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Work steps and precautions in injection molding workshop

Work steps and precautions in injection molding workshop

  • Categories:Industry News
  • Author:
  • Origin:
  • Time of issue:2020-04-07
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(Summary description)Work steps and precautions in injection molding workshop

1. Preparation before starting

1. purpose:

Ensure that the machine can operate normally after being turned on to avoid accidents.

2. Steps and methods

1> The operator first checks the machine to ensure that the machine is clean and free of foreign objects blocking the machine and work station.

2> Whether the electrical installation is clean and whether there is leakage in the insulation facilities. If there is any problem, it must be solved first.

3> Check whether the lubrication system and cooling system are smooth and leak-free.

4> Check whether the mechanical safety device is malfunctioning, check whether the fastening screw of the safety device is loose, whether the fastening nut of the mold is loose, whether the parameter setting of mold opening on the display is abnormal, and whether the selected automatic and semi-automatic modes are normal.

5> If the above is normal, you can start the motor, respectively open the front and rear safety doors, manually operate the machine, check whether there is mold clamping action, if there is any abnormality, you must first repair and eliminate the fault.

2. Start-up trial operation

1. purpose:

Check whether the machine can work normally.

2. Steps and methods

1> Turn on the power and start the motor.

2> During the formal operation, the operator should also pay attention to whether the oil pump motor sound is normal, whether there is noise, whether the machine moving part (such as machine winch, crank, crosshead, etc.) and whether the mold is opened or locked or other abnormalities sound.

3> Only when the machine and mold are operating normally, can the machine be officially started.

3. Precautions

1> Once the operator finds a machine failure or an electrical failure, he should immediately stop the oil pump motor, cut off the power supply, and immediately report to the workshop management personnel.

Third, start production

1. purpose:

Ensure that qualified products that meet the requirements are manufactured.

2. Steps and methods

1〉 Preparation before formal production

○ 1 The operator must first prepare packaging materials (such as carton, pearl cotton, blister tray, etc.) and processing tools (such as nozzle pliers, blades, etc.) according to the products produced before production.

○ 2 Prepare work bench and processing position.

2〉 Turn on

○ 1 The operator should be in place immediately after receiving the start-up instruction.The operator should use the left hand to support the safety door.When the mold is opened, the left hand of the operator opens the safety door and the right hand is ready to take the product. (If you need to take the spout, you should take the spout first ) When the product is ejected, use your right hand to remove the product.Some products need to be taken in the direction.The operator should take it correctly under the guidance of the technical staff to avoid straining the product (when taking the product, the hand must not touch the mold To avoid bruising or burns).

○ 2 After taking out the product, immediately close the front safety door with the left hand, and the machine performs the next cycle.

3〉 Check the product

○ 1 After closing the safety door, the robot should perform a self-check on the product and compare it with the sample provided by the customer or the quality inspection department. (1) Is there any obvious difference in color;

(2) Whether there is lack of glue (not full), shrinkage, and whether there is obvious joint line;

(3) Whether there is crack, top height, top white, broken column, blind hole;

(4) Whether there are obvious draping, dragging, splashing, and air lines;

(5) Whether there are obvious color lines and color points.

(6) If there is no abnormality, the product can be submitted to QC for confirmation. If it is confirmed as qualified, the packaging process can be carried out.

(7) If the operator finds that the product is inconsistent with the model, he must immediately report it to the technical staff or management personnel for processing until the product is qualified.

4〉 Processed products

○ 1 For products with spouts, use pliers. During the process, care should be taken to ensure that the nozzle is cut flat and the product is not damaged.

○ 2 Process the products with a sharp edge (a small amount of colloid in the product edge or empty hole position and thimble position).

(1) If the appearance requirements of the location where Pi Feng is located are not strict, you can use a knife to gently flatten it, and do not scratch the product.

(2) If the appearance of the location of Pi Feng is high, and it is the edge of the product, only lightly press with a smooth surface metal rod (such as a thimble, copper rod, etc.). The pressed product must keep the edge smooth, flat, and not Jagged).

(3) If the product is stained with oil, use nylon gloves and sprinkle with liquid to gently scrub, try to wipe in one direction

Work steps and precautions in injection molding workshop

(Summary description)Work steps and precautions in injection molding workshop

1. Preparation before starting

1. purpose:

Ensure that the machine can operate normally after being turned on to avoid accidents.

2. Steps and methods

1> The operator first checks the machine to ensure that the machine is clean and free of foreign objects blocking the machine and work station.

2> Whether the electrical installation is clean and whether there is leakage in the insulation facilities. If there is any problem, it must be solved first.

3> Check whether the lubrication system and cooling system are smooth and leak-free.

4> Check whether the mechanical safety device is malfunctioning, check whether the fastening screw of the safety device is loose, whether the fastening nut of the mold is loose, whether the parameter setting of mold opening on the display is abnormal, and whether the selected automatic and semi-automatic modes are normal.

5> If the above is normal, you can start the motor, respectively open the front and rear safety doors, manually operate the machine, check whether there is mold clamping action, if there is any abnormality, you must first repair and eliminate the fault.

2. Start-up trial operation

1. purpose:

Check whether the machine can work normally.

2. Steps and methods

1> Turn on the power and start the motor.

2> During the formal operation, the operator should also pay attention to whether the oil pump motor sound is normal, whether there is noise, whether the machine moving part (such as machine winch, crank, crosshead, etc.) and whether the mold is opened or locked or other abnormalities sound.

3> Only when the machine and mold are operating normally, can the machine be officially started.

3. Precautions

1> Once the operator finds a machine failure or an electrical failure, he should immediately stop the oil pump motor, cut off the power supply, and immediately report to the workshop management personnel.

Third, start production

1. purpose:

Ensure that qualified products that meet the requirements are manufactured.

2. Steps and methods

1〉 Preparation before formal production

○ 1 The operator must first prepare packaging materials (such as carton, pearl cotton, blister tray, etc.) and processing tools (such as nozzle pliers, blades, etc.) according to the products produced before production.

○ 2 Prepare work bench and processing position.

2〉 Turn on

○ 1 The operator should be in place immediately after receiving the start-up instruction.The operator should use the left hand to support the safety door.When the mold is opened, the left hand of the operator opens the safety door and the right hand is ready to take the product. (If you need to take the spout, you should take the spout first ) When the product is ejected, use your right hand to remove the product.Some products need to be taken in the direction.The operator should take it correctly under the guidance of the technical staff to avoid straining the product (when taking the product, the hand must not touch the mold To avoid bruising or burns).

○ 2 After taking out the product, immediately close the front safety door with the left hand, and the machine performs the next cycle.

3〉 Check the product

○ 1 After closing the safety door, the robot should perform a self-check on the product and compare it with the sample provided by the customer or the quality inspection department. (1) Is there any obvious difference in color;

(2) Whether there is lack of glue (not full), shrinkage, and whether there is obvious joint line;

(3) Whether there is crack, top height, top white, broken column, blind hole;

(4) Whether there are obvious draping, dragging, splashing, and air lines;

(5) Whether there are obvious color lines and color points.

(6) If there is no abnormality, the product can be submitted to QC for confirmation. If it is confirmed as qualified, the packaging process can be carried out.

(7) If the operator finds that the product is inconsistent with the model, he must immediately report it to the technical staff or management personnel for processing until the product is qualified.

4〉 Processed products

○ 1 For products with spouts, use pliers. During the process, care should be taken to ensure that the nozzle is cut flat and the product is not damaged.

○ 2 Process the products with a sharp edge (a small amount of colloid in the product edge or empty hole position and thimble position).

(1) If the appearance requirements of the location where Pi Feng is located are not strict, you can use a knife to gently flatten it, and do not scratch the product.

(2) If the appearance of the location of Pi Feng is high, and it is the edge of the product, only lightly press with a smooth surface metal rod (such as a thimble, copper rod, etc.). The pressed product must keep the edge smooth, flat, and not Jagged).

(3) If the product is stained with oil, use nylon gloves and sprinkle with liquid to gently scrub, try to wipe in one direction

  • Categories:Industry News
  • Author:
  • Origin:
  • Time of issue:2020-04-07
  • Views:0
Information
Work steps and precautions in injection molding workshop
 
1. Preparation before starting
 
1. purpose:
 
Ensure that the machine can operate normally after being turned on to avoid accidents.
 
2. Steps and methods
 
1> The operator first checks the machine to ensure that the machine is clean and free of foreign objects blocking the machine and work station.
 
2> Whether the electrical installation is clean and whether there is leakage in the insulation facilities. If there is any problem, it must be solved first.
 
3> Check whether the lubrication system and cooling system are smooth and leak-free.
 
4> Check whether the mechanical safety device is malfunctioning, check whether the fastening screw of the safety device is loose, whether the fastening nut of the mold is loose, whether the parameter setting of mold opening on the display is abnormal, and whether the selected automatic and semi-automatic modes are normal.
 
5> If the above is normal, you can start the motor, respectively open the front and rear safety doors, manually operate the machine, check whether there is mold clamping action, if there is any abnormality, you must first repair and eliminate the fault.
 
2. Start-up trial operation
 
1. purpose:
 
Check whether the machine can work normally.
 
2. Steps and methods
 
1> Turn on the power and start the motor.
 
2> During the formal operation, the operator should also pay attention to whether the oil pump motor sound is normal, whether there is noise, whether the machine moving part (such as machine winch, crank, crosshead, etc.) and whether the mold is opened or locked or other abnormalities sound.
 
3> Only when the machine and mold are operating normally, can the machine be officially started.
 
3. Precautions
 
1> Once the operator finds a machine failure or an electrical failure, he should immediately stop the oil pump motor, cut off the power supply, and immediately report to the workshop management personnel.
 
Third, start production
 
1. purpose:
 
Ensure that qualified products that meet the requirements are manufactured.
 
2. Steps and methods
 
1〉 Preparation before formal production
 
○ 1 The operator must first prepare packaging materials (such as carton, pearl cotton, blister tray, etc.) and processing tools (such as nozzle pliers, blades, etc.) according to the products produced before production.
 
○ 2 Prepare work bench and processing position.
 
2〉 Turn on
 
○ 1 The operator should be in place immediately after receiving the start-up instruction.The operator should use the left hand to support the safety door.When the mold is opened, the left hand of the operator opens the safety door and the right hand is ready to take the product. (If you need to take the spout, you should take the spout first ) When the product is ejected, use your right hand to remove the product.Some products need to be taken in the direction.The operator should take it correctly under the guidance of the technical staff to avoid straining the product (when taking the product, the hand must not touch the mold To avoid bruising or burns).
 
○ 2 After taking out the product, immediately close the front safety door with the left hand, and the machine performs the next cycle.
 
3〉 Check the product
 
○ 1 After closing the safety door, the robot should perform a self-check on the product and compare it with the sample provided by the customer or the quality inspection department. (1) Is there any obvious difference in color;
 
(2) Whether there is lack of glue (not full), shrinkage, and whether there is obvious joint line;
 
(3) Whether there is crack, top height, top white, broken column, blind hole;
 
(4) Whether there are obvious draping, dragging, splashing, and air lines;
 
(5) Whether there are obvious color lines and color points.
 
(6) If there is no abnormality, the product can be submitted to QC for confirmation. If it is confirmed as qualified, the packaging process can be carried out.
 
(7) If the operator finds that the product is inconsistent with the model, he must immediately report it to the technical staff or management personnel for processing until the product is qualified.
 
4〉 Processed products
 
○ 1 For products with spouts, use pliers. During the process, care should be taken to ensure that the nozzle is cut flat and the product is not damaged.
 
○ 2 Process the products with a sharp edge (a small amount of colloid in the product edge or empty hole position and thimble position).
 
(1) If the appearance requirements of the location where Pi Feng is located are not strict, you can use a knife to gently flatten it, and do not scratch the product.
 
(2) If the appearance of the location of Pi Feng is high, and it is the edge of the product, only lightly press with a smooth surface metal rod (such as a thimble, copper rod, etc.). The pressed product must keep the edge smooth, flat, and not Jagged).
 
(3) If the product is stained with oil, use nylon gloves and sprinkle with liquid to gently scrub, try to wipe in one direction until clean.
 
5〉 Packaging
 
○ 1Understand the specific requirements of the "Packaging Operation Guide" for the products that need to be packaged.
 
○ 2 Prepare corresponding packaging materials (such as carton, cardboard, plastic tray, packaging rope, etc.).
 
○ 3 When packaging, according to the packaging specifications of different products, use the packaging rope to form a "ten" character frame and fasten it.
 
○ 4 The packaged products are labeled by the operator, and the identification content includes: product name, model, quantity, color, production date, operator, and plan number. The label paper must be uniformly attached to the upper right corner of the cartoon box.
 
○ 5 The packaged and marked product boxes should be neatly placed in the “waiting inspection area” specified by the workshop.
 
6> Disposal of nozzle material, plastic head and waste products
 
○ 1 Nozzle material, plastic head, and waste products must be packed separately for reuse.
 
○ 2 Ensure that spout materials and scrap products are not contaminated and not mixed with other debris.
 
7〉 Precautions
 
○ 1Once the operator finds a machine failure or electrical failure, he should immediately stop the oil pump motor, cut off the power supply, and immediately report to the workshop management personnel.
 
○ 2 During the injection molding process, the operator must take the product from the front safety door. Do not directly touch the high temperature device such as the heating tube with your hands to prevent burns.
 
○ 3 Operators cannot change any injection molding process parameters without permission. .
 
○ 4In the process of injection molding machine, the operator should not leave the job position without permission, and must not talk with people about non-work-related topics.
 
○ 5 In the first ten minutes of starting up (or picking up the machine), the operator must carefully observe whether the lubrication blocks and thimble of the mold are operating normally and whether there is a lack of lubricating oil; if there is any abnormality, report it to the workshop management personnel immediately.
 
○ 6 During the operation, the operator must obey the quality inspector's instructions on the quality. The self-inspected defective products can only be placed in the waste box after final confirmation by the workshop quality inspector.
 
○ 7 When handing over the shift, the operator should clearly inform the successor about the important things that happened on the shift.
 
4. Drying of plastic
 
1> Purpose: To ensure that the plastic can be fully dried as required, and can produce qualified products. 2> Scope of application: suitable for the drying of ABS, PC + ABS and PC raw materials in the injection workshop. 3〉 Steps and methods
 
○ 1 Check whether there is any residual material in the hopper before feeding. If there is, please confirm whether the type and color of the residual material are consistent with the raw materials required for production. If there is any abnormality, the dust outside the material needs to be checked. Scrub.
 
(1) Blow the dust out of the hopper with an air gun, then open the hopper and scrub with a rag.
 
(2) If there are stains in the bucket that are difficult to clean, it can be cleaned with de-stained water until it is clean.
 
○ 2 Cleaning the melted rubber cylinder
 
(1) While cleaning the hopper, turn on the heating power of the melt barrel to make its temperature reach (PC + ABS) 260 ℃ -290 ℃; PC material 290 ℃ -350 ℃.
 
(2) When cleaning the melt tube, the nozzle material with the same color as the product to be produced or a lighter nozzle material can be used, preferably with acrylic nozzle material.
 
(3) Repeat the manual injection of the glue slowly and slowly until it is cleaned, and the color of the material injected in the barrel is consistent with the material to be produced.
 
(4) It is difficult to clean the melted rubber cylinder, you can add 1% screw cleaning agent to the nozzle material for cleaning.
 
(5) After cleaning the hopper and the melt barrel, add the plastic to be dried to the hopper, do not fill it too full, leave a space of 5-10cm (or set the feeding line for easy observation) to facilitate the removal of water vapor. Then turn on the power and adjust the thermostat to (PC + ABS) about 95 ℃, bake for more than 3.5 hours before production, but not more than 6 hours; PC material temperature can be adjusted to about 110 ℃, bake for more than 4 hours, It can be produced, but not more than 6 hours.
 
4〉 Precautions
 
○ 1 When starting production, the operator must shoot the overheated material in the melt barrel until the injected fluid material does not foam, and it looks like it is moist and clean before it can formally form a beer and plastic product. The residual material will degrade and carbonize due to overheating, resulting in product cracking.
 
○ 2 During production, if there is color deviation or color mixing, repeat 4.3.2.2 and 4.3.2.3.
 
5. Mold installation
 
1> Purpose: To ensure that the mold can run normally, and the mouth is not leaking glue.
 
2〉 Installation steps
 
○ 1 The operator finds the corresponding mold according to the arrangement of the “Injection Production Planning List”, and uses the mold car to pull the mold to the designated injection molding machine.
 
○ 2 Check the mold.
 
(1) Whether the model number is consistent with that required by the "Injection Production Plan".
 
(2) Whether the thimble and spring are broken, if there is any problem, it should be repaired.
 
(3) Whether the lubrication of thimble and guide column slider is sufficient. If the lubrication is insufficient, the thimble position needs to be filled with thimble oil, and the slider position should be filled with grease.
 
(4) Check whether there is any debris in the waterway. If it is cleaned with an air gun, the waterway should be clear and then put on the mold.
 
(5) Check if the screw holes of the rings are centered. If it is eccentric, the front and back molds need to be attached to the rings at the same time.
 
○ 3 mold
 
(1) The mold rises to about 1.1-1.3 meters, and the operator installs the copper water pipe under the mold according to the actual situation. (Note: The tooth pattern of the copper water pipe must be the same as that of the mold, otherwise it will damage the tooth pattern of the copper water pipe).
 
(2) The operator should not stand under the mold during the up and down process of the mold to ensure personal safety.
 
(3) When the mold is hung between the head plate, the second plate, and the left and right Golin columns of the injection molding machine, and then slowly lowered, the mold nozzle and the injection nozzle of the injection molding machine basically coincide, and the oil pump of the injection molding machine starts to start In order to test the mold clamping, the motor can be used to slow down the mold opening speed of the injection molding machine.
 
(4) If the thickness of the mold does not match the distance between the head plate and the second plate of the injection molding machine, the operator must start the mold adjustment motor on the injection molding machine. Select the mold advance and retreat key to make the size between the head plate and the second plate basically match the thickness of the mold. At the same time, pay attention to the total pressure gauge on the injection molding machine, which must reach 50kgf / cm2.
 
(5) The operator chooses manual operation, moves the shooting table, and observes whether the nozzle of the mold matches the injection nozzle of the injection molding machine.
 
(6) If they are completely matched, tighten the code screws of the front and rear molds.
 
(7) Connect the water transport of the front and back molds, and check for water leaks.
 
3〉 Precautions
 
○ 1 Both the front and back molds of the company's molds must be connected to a 70 ℃ -180 ℃ mold temperature machine for heating.
 
○ 2 When disassembling and assembling the water pipe of the mold temperature machine, be careful to avoid burns.
 
Injection molding machine operation method and matters needing attention
 
1. Choose semi-automatic or fully-automatic functions according to work needs (be familiar with the function symbols of injection molding machine first).
 
2. When the semi-automatic function is selected, the operator is responsible for taking the product, and conducts self-inspection on the product, focusing on inspection.
 
1> Whether the color has obvious color difference.
 
2> Are there any lack of glue, shrinkage, and fusion wiring.
 
3> With or without cracks, top height, top white, broken columns, and small holes.
 
4> With or without mantle, scratches, and air lines.
 
5> Whether there are obvious color lines and mixed color points.
 
3. Pay special attention to the following points during the production process:
 
1> Take the spout first. Do not take the product without putting it out in the carton.
 
2> Take the product again, and pay attention to the tightness of the product in the mold when taking the product.
 
3> Close the safety door. After the safety door is closed, pay special attention to whether the thimble is retracted. If the thimble is not retracted, open the safety door immediately and report to the foreman assistant or workshop manager.
 
4> The speed of taking the spout, taking the product, and closing the safety door seriously affects the output of the day, so the action must be consistent.
 
5> Too many die strikes, pressure nozzles, and production waste products affect the interests of the company and the company. The original nozzle has not dropped, the product has not been taken out, the thimble has not been returned to its original position, do not close the safety door, the product must be carried out every 10 minutes A self-test.

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