Tag Archives: SMT consumbles

How to use SMT filter to ensure the quality of SMT products?

SMT Filter

SMT filter cotton is usually replaced in three months, otherwise it will be blocked, affecting the use effect.

Filter has the following characteristics.

1.Is a high performance and high efficiency filter cotton non-woven processing using organic hot-melt synthetic fiber and;

2, increasing structure, using gradually encrypted multi-layer technology, that is, the fiber density in the direction of pure air will increase gradually, and the higher filtration efficiency can be blocked at different levels of density according to the size of dust, which will more effectively accommodate more dust.

3, efficient filter cotton sticky treatment, filter material after full dipping, because the adhesive penetrated the media completely, so that the dust particles can not pass through, so that the overall filtered air flow evenly diffused, forming laminar flow state, to achieve the best spraying effect.

 

 

 

 

Does anyone need SMT filter cotton? Factory price.

Please feel free to contact us if necessary.

info@smthelp.com

ming@smthelp.com

 

JUKI nozzle :Which is the most used?

JUKI nozzle

Use black material Seiko forming – wear long life

German technology to create high precision – beyond the original quality

  1. Applicable models: JUKI placement machine

KE2000 series KE2010 KE2020 KE2030 KE2040 KE2050 KE2060 KE2070 KE2080 KE-3010A KE3010ACL KE3020VA JX series JX-100 JX-200 JX-300LED JX-100LED JX-350 , FX series FX-1, FX-2, FX-3, FX-3R, FX-3RA.

  1. Using nano-aviation materials, through ultra-precision machining and grinding, the nozzle will not wear out and become white. It can be durable.

 

 

JUKI nozzle JUKI nozzle JUKI nozzle JUKI nozzle

JUKI nozzle

JUKI nozzle

 

JUKI nozzle

 

● our advantages:

Production advantages: the use of close CNC / milling machine, lathe, grinder, line cutting 35 world first-line brand processing equipment, to make Seiko quality. Non-standard nozzles and the workpiece can be quickly customized, 2-3 working days can be delivered, ultra-rush orders can be shipped the same day.

Long-term inventory, a large number of conventional suction nozzle stock, immediately after the order can be shipped, order to reach 1,000 US dollars can be shipped for free
Price advantage: Suction nozzle and SMT placement machines are a variety of peripheral equipment accessories are sold at preferential prices. Truly Seiko quality, the Chinese price, used to repay customers. We only do Seiko quality, low-end high-margin products do not do!
Team advantage: We have a group of 20 years of experience with automatic insertion machine, SMT machine service engineer team
Payment advantages: As long as you are a factory customer, we can do monthly payment

JUKI nozzle

Buy now for just $ 25, please click on the link for more details

 

We also sell all kinds of brand accessories, such as JUKI,universal, panasonic, yamaha, samsung, Fuji, Siemens, TDK

If you have any needs, please feel free to contact us:

info@smthelp.com

ming@smthelp.com

JUKI nozzle

FUJI XP142/143 2.5/3.7# Nozzle

 SAMSUNG nozzle  CP45FV/SM420 CN065 CN040 CN220 CN400 TN220 TN065

Panasonic nozzle Panasert- smt nozzle for pick and place machine

 

SMT Nozzle Cleaning Machine Operation Manual




Nozzle Cleaning Machine

Operation Manual


Please read the instructions carefully before user operation

Preface

First of all, we sincerely thank you for choosing the SMT peripheral automation machine produced by our company. This company specialized production: conveyor, automatic feeding detection machine, vacuum suction machine, stacked on the machine, parallel transfer, angle conveyor, turning machine,machine, double buffer for the same reflow furnace system, a series of automated production machine. According to the customer’s requirements, we can develop and design a series of automation machine, in order to meet the customer’s high efficiency, energy saving, downsizing and other production needs. This manual describes the use of methods and machine maintenance and precautions, in front of the machine, please carefully read this manual, and it will be properly preserved, wrong operation may cause the device does not operate normally or damaged parts. Due to man-made machine failure or parts damage, will not apply to the company’s exemption free warranty service range. Without permission of the company, please do not disassemble or replace the machine parts, nor applicable to the company’s free warranty warranty service range. As to the improvement and partial renewal of the product, we will not make further instructions. If you have any doubts, please contact our company for consultation.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Important matters and safety instructions

When using this Cleaning Machine, you must abide by these safety devices.

All attention should be taken to avoid accidents and damage to the instrument.

1. please read and understand the user’s manual carefully before using or operating this machine.

2. non – instrument maintenance personnel and untrained personnel should not use this machine at will.

3. please avoid the use of this machine in the vicinity of the strong electromagnetic interference source.

4. please avoid the use of this machine in the environment with high humidity.

5. maintenance, please turn off the power, to prevent damage to components.

6. instruments are used, they should be kept stable to prevent falling.

二、Appearance introduction

 

 

1Liquid storage tank

When the cleaning liquid is completely unused, the liquid can be added, and the addition method is referred to the addition of the solution step.

2Emergency switch

After pressing the emergency switch, PLC is out of power and the equipment stops working

6Storage tank

Store the cleaned liquid and put out of the liquid in time.

Step: the tank is pulled out, carefully put out the liquid.

三、Operation steps

1. connect the power supply (220V, 50HZ) and gas supply (0.6MPa), turn on the power switch.

2.Check whether there is a liquid on the left level (the grooves pipe), if its no,then add liquid (detailed please refer the step of adding the liquid).

3. Switch is normal opening , and the touch screen appears as the Figure 3.1 interface


Figure 3.1

4. Click Figure 3.1 [into system], and appear on the interface, such as Figure 3.2. If you need to set parameters, enter the manual tool interface for parameter settings (detailed please refer the parameter settings).When you set it up, Hit [save parameter].


Figure 3.2

Note: first use the parameters set first ( refer parameter settings) and then do the next step.

5. When nozzle is placed well,closed the door tightly ,and set the parameters(can skip). Confirm that the suitable angle is adjusted well, that is, the nozzle is aligned with the suction nozzle center, otherwise it can’t be cleaned.

6. Click Figure 3.2 [reversion], then click Figure 3.2 [auto start] (after click finish is displayed as automatic stop) or press the boot button of the device

 

四、Parameter setting

1. click the [manual tool] as shown in Figure 4.1, as shown in Figure 4.2

Figure 4.3

Input signal monitor(click the interface of Figure 4.2 [ input and monitor].)

Figure 4.4

Manual control interface(click the interface of Figure 4.2 [ control debug].)

Use in manual debugging


Figure 4.1


Figure 4.2

 


Figure 4.3


Figure 4.4

2. click on Figure 4.2 [parameter settings], appear as shown in Figure 4.5, according to actual needs, set up relevant parameters, click figure 4.5 [bottom parameter], the password is 4 “8888”, and then appear as shown in Figure 4.6.

Figure 4.5

1) nozzle: set the number of nozzle (according to the jig can install the number of nozzle to set)

2) clean time: setting up a single nozzle cleaning time (according to the actual situation)

3) air-dry time: setting the time to complete the air-dry of a single nozzle (according to the actual situation)

4) save parameter: after setting the complete parameter, you need to click the [save parameter].

Figure 4.6

1) Original correction: to confirm the suitable angle, that is, the angle of the nozzle and the nozzle center to be rearranged, and the setting is set up.

2) Power on air storage time: set according to the actual situation

3) Air storage time before clean: it refers to the setting of the gas storage time before each cleaning, according to the actual situation.

4) Interval air storage time: express the later that later chose not to select the display as “yes”, For example, the clean time is 3 S, and interval air storage time is set to 1S, after cleaning 1S, gas storage for 1 S, and then clean for 1 S.

5) Impulse quantity: it express the impulse quantity for the turn of the turntable to 1o. If the device is not at its origin, it will increase the impulse quantity if it arrives at the origin. If it is found that the device is not at its origin, if it exceeds the origin, it will increase or decrease.

6) Continuous jet: express choose whether to continue the actual situation as yes” no choice later, shown as “no” is that he has chosen to continue.

 

五、Adding liquid steps

1. after the start of the machineenter the standby state and enter the interface shown in Figure 5.1.

Figure 5.1

2. click [pressure relief] has been holding down the nozzle, until no gas ejected and then release the hand off power.

3. open the tank cover, a funnel into the washing solution until close to the reservoir until canful.

4. closed storage tank cover, power off, re-work.

Note: the cleaning solution will never be allowed to splash into the equipment, otherwise the controller will burn out.

 

 

 

 

 

 

 

六、Daily maintenance project

Time

Maintenance project

Daily the water must be emptied after each use.
the water must be cleaned up on the platform after each use.
Weekly check whether there is water leakage in the pneumatic cabinet and electrical cabinet.
check the looseness of the screws in each movement mechanism.
check whether the external electrical connector is loose.
cleaning the dust and debris in the electric cabinet and the pneumatic cabinet.
check the air leakage of the pneumatic components and the joint of the trachea.
Monthly check the oil mist special oil in the oil mist is too small, less is added.
check whether the internal joint of the electric cabinet is loose.
check the entrainment wheel, whether the belt wear out.
lubricating grease for all bearings of each device.

S -1688 Stencil Cleaner Machine USER MANUAL for PCB Assembly

Meet the Needs of the SMT Age

 

 

Please read this user manual carefully before running

 

 

 

 

 

 

 

 

S-1688 Stencil Cleaner Machine

 

 

 

USER MANUAL

 

 

 

 

 

 

 

 

 

 

 

 

TEL : 0755-83203237

FAX : 0755-23240492

ADD : Room 1806, Block 3, Jinyun COFCO, Qianjin 2nd Road ,Baoan District,
Shenzhen City, China

 

 

CONTENTS

 

1.0 safety warning……………………………………………………………………………….3

 

2.0 product presentation
…………………………………………………………………3

 

3.0 installation requirements……………………………………………………………….4

 

4.0 Operations Guide……………………………………………..…….………………………………..5

 

5.0 The cleaning of the solvent is added, platoon and storage tank………………………………………………………..………….…………………………………………..13

 

6.0 Replacement of filter element………………………………………………………15

 

7.0 Product use precautions……………………………….…………..……………….…………………………………..16

 

8.0 working principle………………………………………….………………………………………..16

 

9.0 Maintenance, fault handling ……………………….………………………………………16

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.0 safety warning

1.1 Please read this manual carefully.

 

1.2 Please strictly follow the installation requirements in this instruction and the guide to operation. The installation and use of this equipment.

 

1.3 Please equip a person to operate the equipment

 

1.4 The operator must wear protective glasses, protective gloves, protective respirators and other protective products.

 

2.0 product presentation

 

2.1 Name: full pneumatic steel net cleaning machine

 

2.2 model: S-1688

 

2.3 Product features

 

1)
Use full pneumatic logic control, one-click operation, easy to finish cleaning and drying

 

2) No power supply, no fire hazard.

 

3) The cleaning frequency system is automatically counted to facilitate the replacement of consumables in time to ensure the quality of cleaning work.

 

4) The cleaning pressure can be adjusted according to the need to ensure the stability of steel mesh tension, thus ensuring the longer service life of the steel net.

 

5) The whole operation process is completely closed, avoiding the direct contact between the workers and the cleaning fluid

 

6) Various types of cleaning fluid can be used for efficient cleaning

 

7)
Can effectively remove solder paste, such as red glue residue and more from steel mesh, wire mesh, copper mesh, microporous network, scraper, fixture, PCB, etc.

 

8) The three – level filtration device ensures the recycling of cleaning fluid, and realizes the minimal loss of cleaning fluid.

 

9)
Asymmetric rotating spray arm: ensure the cleaning of fine PCB holes.

 

10)
Digital free setting cleaning and drying time

 

 

2.5. Main technical parameters:

 

Application stencil, glue screen , copper screen
Stencil size Standard 29 inch and below
Clean liquid capacity Max 50L , Min 20 L
Cleaning fluid volume 40L
Cleaning method  Rotary double-sided pressure injection and
high-pressure air spraying ( cleaning and drying )
Clean time 2~4 min (stencil and copper net)
Rinse time 2~4 min (stencil and copper net )
Dry time 2~5 min
External air supply 0.4Mpa~0.6Mpa
Air consumption 400~600L/Min*2
Air outlet size ?125*25mm
Weight  320Kg
Dimension  980mm(L)*700mm(W)*1730mm(H)
Tin filter method Three class filter (10?m,5?m,1?m)

 

3.0 installation requirements…

 

3. 1. Installation site

 

In order to ensure safe production and prevent possible damage to the equipment, the equipment should be installed in a place that meets the following environmental conditions

 

1) Stay away from sources and heat sources

 

2?The air is dry and well ventilated

 

3) Clean, clean, flat and unshaken ground

 

3. 2. Installation accessories, required energy and precautions

 

1) The source pressure is : 0.4Mpa~0.6Mpa

 

2)Taken the air over diameter for ?: 12mm, a quick joint is needed

 

3) The top of the equipment is designed ?: The 125mm exhaust port shall be connected to the outside by independent air duct

 

 

4) matters need attention: In order to ensure safe production, customers must ensure that the following security measures are installed in place. Otherwise, the company does not assume any responsibility for security

?It is at least 3 meters away from the electric equipment, away from fire source and heat source

 

?The ground wire must be connected, and the earth shall not be connected to any other electrified equipment

 

?The exhaust duct of this equipment shall not be connected to any equipment that can produce heat source. (such as reflow soldering wave soldering of SMT, etc.)

 

3.3 installation space

 

To facilitate the maintenance and replacement of spare parts for equipment operation, please leave more than one meter space around the equipment

 

4.0 Operations Guide

 

A Preparation before operation

 

4.1.1 connect the air source to the machine, the gas source is connected well, the display lamp is highlighted and the subsequent work can be continued

 

4.1.2 check if air pressure in the standard rating (04-0.6 MPa) range. Lower than 0.4mpa will affect the cleaning effect and reduce production efficiency (too low will not activate the machine).

Higher than 0.6mpa can result in damage to the mechanical gas system and all parts of the system.

Adjust the pressure method: pull upward gently to adjust the knob and rotate to the right————- Increase pressure

Go to the right ————– reduce stress

After reaching the required pressure, press the adjusting knob, air pressure lock and pressure to complete the gas connection, and the lamp is highlighted





 

 

4.1.3 check whether the top exhaust duct is unblocked or unblocked, which will result in damage to the environment and other consequences of the cleaning effect


 

 

 

 

4.1.4 check the glass viewport of the door panel through the liquid road to check the solvent reserves. The normal state is above the M position, and the machine can meet the various cleaning effects. The amount of liquid stored in this model is the maximum amount (40L).


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4.1.5 if the solvent is not enough, please add adding method in time: see adding solvent method

 

4.1.6 the pump access panel is opened with a randomly attached triangle key to check whether the ball valves are in normal condition

Ball (the ball valve of pump outlet filter) A ball valve D (pump inlet connection of the reservoir fluid Xiang ball valve) opens, B ((the ball) of white PE tube pump discharge ball valve C (white PE tube pump inlet ball valve) closed


 

 

 

 

 

 

 

 

 

 

 

 

 

 

4.2 time setting

 

4.2.1The setting of the cleaning time (see figure below), gently rotate the timer protection cap to the left and pull up the cover.

 

General cleaning time is

Minutes, depending on the actual situation, will be different.

This timer is measured in seconds (S) with a range of 10-999 seconds (S).

It can be set to 0, otherwise the machine will not start and may damage the timer and other components.

 


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4.2.2 setting of drying time

Operation method and cleaning time setting.

The general drying time is 4-6 minutes depending on the actual situation.There will be an elongation of the aqueous solvents.

 

4.2.3The cleaning and drying time are automatic reset.

That is, one set, multiple times (N times).

When the pressure is less than the required number, the timer can be reset and the device cannot be started.

At this point, the black reset button on the upper row of the timer can be reset manually.

 

 

 


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4.2.4The counter’s use of this counter is the increment counter, each cleaning a steel net, automatically into the system,

One of them is going up.

The count range is 0-999999.

Mainly used for cleaning work statistics, timely replacement of consumables (filter element), etc.

The filter cartridge should be changed when cleaning up to 1500.

Specific visual cleaning products are different and different.

When the counter displays the number to reach the target number, press the 4.2.3 method to open the cover, then press the black reset button on the left of the timer and the counter is reset.

 

4.3 placement of steel mesh

4.3.1 press the inner door safety button to open the cleaning room


 

 

 

 

 

 

 

4.3.2 lift the steel net with http://topmednorx.com both hands, gently place the front in the cleaning room chute roller and push it gently forward to the sliding channel steel

Fixed fixture on the net.

The steel net is in the middle of the fixture and chute. The top of the steel net is at the top of the cleaning room

Steel mesh fixture middle.(see below.)


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4.3.3 when placing the steel mesh, the steel mesh shall not be in contact with the door to avoid damaging the steel net and sealant


 

 

 

 

 

 

 

 

 

 

 

 

 

4.3.4After the steel net is placed, close the cleaning door.

The inner door should be kept in good condition, otherwise, the solvent will be expelled outside, causing machine damage or environmental damage, more likely to cause personal injury



 

 

 

 

 

 

 

 

 

 

 

 

4.3.5 after the inside door is closed, continue to close the outer security door.

The security door is closed and the light is on, so that the following operation can be continued.

If the security door is not closed, the lamp will be retracted and the machine will not be able to start.

After closing the door again, the machine can be started

 


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4.4 the start of the machine

 

4.4.1 press the start button lightly and the machine will start to run.

The machine will be automatically restored until the cleaning is completed


 

 

 

 

 

 

 

 

4.4.2 use the emergency stop button to press the emergency stop button when the emergency situation is in place. The machine will stop running.

The emergency situation is eliminated and the machine is restarted



 

 

 

 

 

 

 

4.5 adjustment of cleaning pressure

After the machine starts, pay attention to the pump input air source pressure and output cleaning pressure.

In order to achieve the best cleaning effect and maintain the tension of the steel mesh, the pressure should be adjusted


 

 

 

 

 

 

 

4.5.1 pump input air source pressure is generally maintained at about 0.4mpa

 

4.5.2 cleaning pressure is generally maintained at about 0.2-0.3MPa


 

 

 

 

 

 

 

 

 

4.5.3 adjustment of pump pressure: gently pull the adjusting knob of the pressure-reducing valve and turn the pressure on the right to increase the pressure to the left.

After adjusting well, press the adjusting knob to lock and adjust the work.

Note: this valve is the pressure reducing valve, the pressure adjustment will not be higher than the air source


 

 

 

 

 

 

 

 

4.6 the setting time is terminated and the machine is automatically stopped.

A cleaning cycle is over

 

5. Add, drain, and container for the solvent

 

5.1 addition of solvent

5.1.1 let the machine stop and open the access panel.

5.1.2 close ball valve B, D, open ball valve A, C.

Insert the “IN” pipe IN the ball valve C into the container containing the solvent.

Control the “IN” tube and start the machine until the machine drains the solvent.

 


 

 

 

 

 

 

 

 

 

 

 

 

 

5.2 discharge solvent and storage tank cleaning

5.2.1 open the liquid access panel and start the machine according to the normal procedure.

Close the ball valve D, open the ball valve C, and leave the machine idle for 1 minute.

In order to take out the solvent in the filter.

5.2.2 Open 8 screws on the tank and remove the reservoir cover..

 

5.2.3 press the stop switch to stop the machine.

Close the ball valve A and C, insert the “OUT” pipe of ball valve B into the container and slowly open the ball valve D.

Take care to control the “OUT” pipe at this time so as not to cause an accident.

 

5.2.4 when the solvent location of the reservoir is lower than the outlet filter of the reservoir, close the ball valve C and open the ball valve D.

Insert the white PE tube into the storage tank to remove the remaining solution

 

5.2.5When the solvent is removed, loosen the filter to fix the wire, remove the filter bag, remove the filter of the outlet and clean it with water or other means.

When the storage tank is cleaned and reloaded, cover the tank and lock the container

 

 

5.2.6 the liquid storage tank shall be cleaned and the solvent shall be drained and the machine shall be turned off.

Use a shovel knife to clean up the thick residues, leaving the small residue with a cloth strip

 

5.3 precautions for solvents

 

5.3.1 please wear protective equipment, such as protective gloves, protective glasses, protective masks, etc. to avoid direct contact with the human body and affect health and other safety accidents.

When operating, please pay special attention to the “IN” and “OUT” piping that controls the activity so as not to cause unnecessary security

 

6. Replacement of filter element

Replace the filter cartridge when cleaning a certain amount of steel net, the filter element needs to be replaced to satisfy the cleaning effect.

The replacement method is as follows

 

6.1. Remove the bottom of the filter with the left hand of the filter and remove the wrench into the disassembly hole, rotate the wrench to the left, remove the filter, then remove the filter element


 


 

 

 

 

 

 

 

 

 

 

6.2 installation of filter element

Wipe the filter clean and put in the new filter. (note that you can install a 5-micron filter on the outside by installing a 1-micron filter.

Then the left hand holds the bottom of the filter, and the right hand moves the filter nut.

When the hands are wrung, remove the wrench and hold it until it is unscrewed.

Pay attention to the filter cartridge when operating, the position of the filter should be put in place, for the positive

 

6.3 Replacement of seal rings

The sealing ring of the filter shall be soaked in the solvent for a long time because the chemical function will become larger. When the filter is removed, it will be difficult to install again.

The sealing ring should be removed at this time, with the spare ring installed.

Close the sealing ring after getting bigger, and substitute elastic back for backup

 

7. Use precautions

7.1. The installation site of the equipment is strictly prohibited near the source of fire, heat source and power supply.

The ground wire and exhaust duct must be installed and installed completely independently. It shall not be connected or connected with any other equipment

 

7.2. Replace the solvent, add, discharge the solvent, change the filter core, and when the steel net is taken, please wear protective equipment.To ensure the operator’s health and safety accidents.

 

7.3. Require strict access, adjustment and use of air source pressure according to the rated standard.Operate the machine according to the operating instructions and procedures of the machine.

 

7.4. It is not possible to bring cloth, paper scraps or other sundries into the machine cleaning room, or leave it in the storage tank, or it may cause blockage of the pipe and damage to the machine.

 

7.5. When operating the machine, please pay attention to the moderate intensity to avoid damage to the machine components.

 

7.6. No solvent cleaning machine surface or other non-stainless steel components shall be used to ensure the service life of the machine

 

8. Working principle

 

S-1688 Stencil Cleaner Machine

9.0 maintenance and fault handling

 

9.1 maintenance

 


 

 

 

 

 

 

 

 

 

 

 

9.2 fault handling

 


 

 

 

 

 

 

 

 

 

 

 


How to use Bowl vibration feeder for Bulk Electronic components for PCBA

For the last 20 years any odd-form components that did not come pre-packaged have been assembled BY HAND. Any PCB Assembly in today’s market can gain quick advantages by automating their assembly line. Huge costs are spent unnecessarily on labor and import fees.
If you are considering automation of odd-form components in your PCBA, consider these questions:
  1. Does your desired component come available in a package?
  2. Is your lead to hole ratio appropriate for automating?
  3. Is the quality and repeatability of the component suitable for automation?
  4. Does your component require lead preparation prior to insertion?
  5. Does your process require that the component is clinched?
Need help with these questions? Let us know and we will help design your Odd-Form Assembly tailored to your needs!

 

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Reflow oven technology and precautions

Reflow oven technology and precautions

Far infrared reflow again

In 80s the use of far infrared reflow has the characteristics of fast heating, energy saving, stable operation, but because the printed circuit board and various components for different material, color and thermal radiation absorption rate to have very big difference, caused by a variety of different components and different parts of the circuit temperature is not uniform, the local temperature difference. For example, the black plastic package of integrated circuit will be overheated due to the high radiant absorption rate, and the welding part of it will lead to false welding on the silver lead instead of low temperature. In addition, the heat radiation blocked on printed boards, such as welding pins or small components in the shadow parts of big (high) components, will cause poor welding due to insufficient heating.

1.2 full hot air reflow again

Full hot air reflow oven  is a welding method by which the flow of airflow is forced through a convective nozzle or a heat-resistant fan, so that the welded parts are heated. This kind of equipment began to rise in 90s. Due to the adoption of this heating mode, the temperature of PCB and components is close to the temperature of the given heating area, which completely overcomes the temperature difference and shadowing effect of infrared reflow soldering, so it is widely applied now. In all hot air reflow oven  equipment, the convection velocity of the circulating gas is very important. In order to ensure that the circulating gas acts on any area of the printed board, the air flow must have a fast enough speed. To a certain extent, it is easy to cause the jitter of the printed board and the displacement of the components. In addition, in terms of heat exchange, the efficiency is poor and the power consumption is more.

1.3 infrared hot air reflow again

This kind of reflow oven is a more ideal heating method, which is based on the IR oven with hot air to make the temperature even more uniform insaide the oven. The characteristics of this kind of equipment to make full use of the infrared penetration, high thermal efficiency, energy saving, and effectively overcome the temperature difference of infrared reflow soldering and shadowing effect, and make up the influence of hot air reflow on gas flow caused by excessive demand, therefore  at international this kind of IR+Hot reflow is used most commonly  at present .

With the increase of assembly density and the appearance of fine spacing assembly technology, a reflow oven  furnace with nitrogen protection has appeared. Welding under nitrogen protection conditions can prevent oxidation, improve welding wetting power and speed up wetting speed. It is more suitable for uncleaning process to reduce the welding force and reduce welding beads.

2  The establishment of  temperature curve

The temperature curve is the curve of the temperature of a point on the SMA will change over time when SMA through the reflow oven. The temperature curve provides an intuitive method to analyze the temperature change of a component during the whole reflow process. This is very useful for obtaining the best weldability, avoiding damage to the components due to overheating, and ensuring the quality of the welding.

The following is a brief analysis of the preheating section.

2.1 preheating section

The purpose of this section is to put PCB at room temperature as soon as possible heating, to achieve second specific targets, but the heating rate should be controlled in the appropriate range, if excessive, will produce thermal shock, circuit boards and components may be damaged; if too slow, will not fully solvent, affecting the welding quality. Due to the rapid heating rate, the temperature difference in the rear section of the temperature zone is larger than that in the SMA. In order to prevent the damage of thermal shock to the component, the maximum speed is 4℃/s. However, the normal rise rate is set to 1-3℃/s. The typical heating rate is 2℃/s.

2.2 heat preservation section

The heat preservation section is the area where the temperature rises from 120℃-150℃ to the melting point of the solder paste. Its main purpose is to make the temperature of each element in the SMA stable and minimize the temperature difference.In this area, the temperature of the larger components can have enough time to catch up with the smaller components and ensure that the flux in the solder paste is fully volatile. The oxide of the soldering plate, the solder ball and the pin of the element is removed, and the temperature of the entire circuit board is balanced until the end of heat preservation section. It should be noted that all elements on the SMA should have the same temperature at the end of heat preservation section, otherwise, entering the reflux section will cause various bad welding phenomena due to the uneven temperature of each part.

2.3 reflow  section

In this area, the temperature of the heater is set to the highest, which makes the temperature of the component up to the peak temperature. In reflow sectionthe,the different of peak temperature is according to the solder paste to change, the general recommendation for solder melting point temperature plus 20-40℃. For 63Sn/37Pb solder paste with melting point of 183℃ and Sn62/Pb36/Ag2 solder paste with melting point of 179℃, the peak temperature is generally 210-230℃. Reflow time should not be too long to prevent adverse effects on SMA. The ideal temperature curve is the smallest area covered by the “tip zone” of the solder melting point.

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Reflow oven process principle and introduction

The reflow oven process principle and introduction

As we know,reflow oven is the most important welding technology in surface mount technology. It has been widely used in many industries including mobile phones, computers, automotive electronics, control circuits, communications, LED lighting and many other industries. More and more electronic devices are converted from through hole to surface mount, and reflow oven  replaces wave  soldering is a obvious  trend in welding industry.

So what is the role of reflow oven equipment in the increasingly mature lead-free SMT process? Let’s take a look at the whole SMT surface mount line:

The whole SMT surface mounting line consists of three parts, such as steel mesh solder paste printing machine, SMT machine and reflow oven furnace. For the machine, and compared with lead free, and no new demands on the equipment itself; for screen printing machine, and a lead-free solder paste in the physical properties there are some differences, so put forward some improvement on the device itself, but there is no qualitative change. the key of lead-free  is  in the reflow oven.

The lead paste (Sn63Pb37) melting point of 183 degrees, if you want to form a good weld must have the thickness of 0.5-3.5um intermetallic compounds in welding, intermetallic compound formation temperature is above the melting point of 10-15, the lead welding is 195-200. The maximum withstand temperature of the electronic device on the circuit board is generally 240 degrees. Therefore, for lead welding, the ideal welding process window is 195-240 degrees.

Because of the change of melting point of lead-free solder paste, lead-free welding has brought great changes for welding process. At present, the lead-free solder paste is Sn96Ag0.5Cu3.5 and the melting point is 217-221 degrees. Good lead-free solder must also be formed 0.5-3.5um thickness intermetallic compounds, intermetallic compound formation temperature is also above the melting point of 10-15 degrees, for lead-free welding, that is, 230-235 degrees. Since the highest temperature of lead-free solder electronic device will not change, therefore, for lead-free soldering, ideal welding process window is 230-245 degrees.
The substantial reduction of process window brings great challenge to ensure welding quality, and also brings higher requirements to stability and reliability of lead-free wave soldering equipment. Because the equipment itself is coupled with the electronic device transverse temperature difference, due to differences in size of heat capacity will produce temperature difference in the heating process, so in the process control of lead-free reflow oven can be adjusted in the process of welding temperature window becomes very small, this is the real lead-free reflow to the difficulty.

 

PCB Loader/Unloader The latest introduction to 2017

PCB  loader/unloader

The latest introduction of PCB loader/unloader 2017

Characteristics of the equipment.

PCB Automatic UNloader PCB conveyor

1.Special aluminum alloy mechanism to better understand the operation status of magazines.

  1. Stable casting platform structure design, improve the stability of equipment 0.3. Panasonic PLC control, multi-function circuit and program design, performance stability, ensure the smooth and smooth production line.
  2. Humanized programming, 4 kinds of PITCH selection, can set the step distance of receiving/transmitting PCB.

  3. Standard SMEMA communication interface, which can communicate with other automation equipment.

  4. The material box shall be transported by the engineering plate.

  5. Adjustable push plate speed control.

  6. Three-point positioning type upper and lower pneumatic clamping, ensure the location of the material box is accurate.

  7. Push plate protection system to ensure that PCB board is not crushed, reducing process loss. This equipment adopts SMT circuit board production line operation

PCB size: (mm):   50 x50~330 x445
Working height (mm): 900 + 20 (STD)
groove Change time:   bout 6 seconds
The machine size :1650(L)845(W)1250(H)
Step selection:  10.20.30.40 mm
Power supply:  AC 110/220v plus or minus 10V, 50/60hz knife bank
Dimensions (L * W * H, MM) : 355 (L) * 320 (W) * 565 (H)
Air pressure and gas flow : 4-6bar / 10 litres/min
Weight (KG):140 kg

自动装载机 PCB loader
loader

 

This equipment is used SMT circuit board production line operating upper and lower plates

PCB SIZE:(mm):50×50~330×250
Working height (mm):900±20(std)
Tank replacement time: about 6 seconds
Machine dimensions:1920(L)845(W)1250(H)

Step Select: 10.20.30.40 mm
Power Supply: AC 110/220V±10V, 50/60HZ
Magazine size (LWH,MM):355(L)320(W)565(H)
Barometric pressure and gas flow rate: 4-6bar/up to 10 l / min
Weight (KG):260KG

PCB Automatic UNloader
PCB Automatic UNloader

PCB

SMT loader

SMT loader
This equipment is used SMT circuit board production line operating upper and lower plates
AI smt线
AI smt line           

If you want to get more product introductions, please contact us:
www.smthelp.com
ming@smthelp.com
jasonwu@smthelp.com

 

AI, Auto Insertion : Axial Inserter; Radial Inserter; JW (Jumper Wire) Inserter; Odd form Inserter; PIN inserter; Eyelet Inserter; Terminal Inserter IM, Insertion Mount, MI,Manual Insertion, DIP, Wave soldering

6 Key Technologies for LED Pick & Place Machines