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What are the common problems in the injection molding industry?

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Note: One current contactor of temperature is broken, and the other is connected to control.

1. If there is a flower, try to increase the temperature of the baking material.
2. If there is a material flower, increase the back pressure above 25bar.
3. One current contactor of temperature is broken, and the other is connected to control.
4. The front and back molds transport water in series to connect.
5. Turn off the cooling water of the machine and start production.
6. The electric heating is not turned off when the nozzle is removed.
7. The mold is hung in the air, standing below to collect water.
8. Use an iron rod to hit the nozzle.



9. Sharpen the thimble to knock it into the water.
10. The high pressure is raised when the machine is stopped, and the mold cannot be opened when it is re-production.
11. Do not turn off the power supply, turn off the motor, or hang warning signs during equipment maintenance!
12.In the low pressure alarm, increase the high pressure position.
13. When the manual clamping cannot be closed, increase the operating intensity of your hand (tighten the switch or poke the button hard.)
14. In order to make the material go down faster, use a hard object to poke the feed opening when the screw returns!
15. Coveting convenience and saving time, the press block is not upright when the mold is loaded!
16. When the screw temperature is not reached, lower the temperature and return the material, causing the screw to break!
17. Use a crane to lift the mold without removing the pressure plate
18. The main runner sticks to the mold without using a copper rod to knock it with an iron rod.
19. The main flow channel sticks to the mold. When the mold is not closed, the main flow channel is directly hard "squeezed out" by the injection action.
20. The product is too full and sticks to the movable mold. It is pressed for many times with full pressure and full speed, the thimble is broken, and the ejector is deformed;
21. The gate is too small, the product is not full, the barrel temperature rises sharply, and the material decomposes;
22. The drawing pin is worn and the runner material is not easy to fall off. Use the high pressure and low speed at the end of the mold to harden or pull the ring to force it;
23. The product is fixed to the mold, and the mold is directly closed to try to pull the product out.
24. Remove the water pipe from the mold up and down to leak water into the electric box, causing the computer to black screen and the motherboard to burn out;
25. The motor start protection is set improperly, it will act immediately as long as it is started, there is no corresponding delay time, and the motor will be damaged;
26. Short-circuit the security door card system, and the door can be locked even when the door is opened;
27. Clamp the mold with paper pad on one side of the mold (the parts have burrs), which will cause deformation of the clamping mechanism and even breakage of the pillars;
28. The front mold of the product is stuck with hot glue and the clamping mold is hard pulled out
29. The barrel temperature is not enough (or the set temperature does not match the required temperature of the material), start the melt screw
30. Used in raw material (recycled material) without magnet holder.
31. The cooling water pipe of the barrel is not connected or not opened, even in use.
32. Production of easily decomposable and corrosive materials such as PVC; Bakelite, the material in the barrel, stop until it is emptied
33. If the hot runner mold thermostat does not heat up, replace the control table (do not check whether the mold and thermostat are faulty) and burn the table repeatedly
34. Pull the plug on the mold when the thermostat power is turned off
35. If the machine motor is not turned off or the power supply is turned off, it will work in the mold
36. After the mold is loaded, the mold is opened without the anti-opening piece (steel bars that are not allowed to be opened before and after fixing)
37. After the mold is placed, the mold will be opened if the crown block is not lowered
38. The oil pipeline of the oil pump is leaking or slightly cracked, and it is tied up with tape or other cloth strips and used barely;
39. The wires are bare, bundle them with transparent tape and leave them wherever they are;
40. The abnormal alarm is high-pressure mold clamping without finding the cause
41. After a short shutdown, the machine will not be glued and the machine will start directly.
42. When the nozzle leaks, use paper or iron pads;
43. After the hot runner mold is loaded, turn on the electric heating switch first, and then turn on the water (the hot runner is heated by leaking water)
44. The upper mold is unbalanced, and the low pressure lock is increased when the mold cannot be closed
45. When trying out molds or producing small batches, in order to save troubles, only 4 die sets are used or no water is connected.
46. In order to be cheap, short-circuit the safety switch of the rear safety door.
47. Ineffective use or non-use of mechanical safety gates, it is estimated that 80% of factories have done so.
48. The mold that needs to be heated for mold trial is directly burned with a fire gun to heat the mold cavity
49. The safety stick is broken and tied with a rope. Continue production without processing
50. Many times the thimble does not drop the product. When it is fully automatic, forcibly take samples from above, be careful!
51. When the hydraulic oil is insufficient, continue production. The lower limit of the hydraulic oil will last for a long time. It is easy to damage the quantitative pump. If it does not work, open the circulating water pipe and add some water.
52. Before the mold is loaded, the ejector pins are installed on the machine, and the ejector pin pressure is increased suddenly if the ejector pin cannot be ejected, resulting in...
53. The product's thimble position is oily, use a gun to burn the thimble directly
54. When the mold is forced to reset, be lazy and don't install it!
55. There are safety protection devices, be lazy, don't install!
56. Do not meet the requirements and force high-pressure mold clamping and injection!
57. The core-pulling tubing is too long, short the card switch and do not close the safety door!
58. In order to save effort in opening and closing the door, the mechanical safety block should be hung with a rope, or simply not used!
59. Remove the plastic injection protective cover and use it to facilitate the removal of the plastic block;
60. Lift the mold without opening the mold and hoist the machine.
61. For molds with core pulls, open the mold regardless of the order, and the mold will be broken
62. Product demoulding is not good, polish the EDM surface;
63. The thin-walled product card die is drawn with copper wire, but when the copper wire is knocked flat, it is directly knocked on the pillar
64. Upper and lower molds, hoist the mold to the machine to set the position, do not press it with the pressure plate in time, do other things, others open the mold without knowing it, and the mold falls.
65. The product is stuck to the fixed mold, and the copper rod is not found. Knock it with an iron rod to break the mold
66. When the hot runner mold is flowing glue, because the hot nozzle is too deep, the temperature will increase without confirming the decomposition temperature of the raw material, and try to melt the cold glue;
67. When hoisting the mold, it does not check whether the lifting ring is installed properly, and the mold is dropped during operation;
68. The mold is hung in the air to adjust the mold thickness.
69. The core-pulling setting is reversed, directly semi-automatically, the mold hits.
70. Externally rotate the injection molding machine nozzle to reduce the length of the thread and extend the nozzle (when the injection molding machine nozzle is not long enough).
71. If the ejector plate of the mold has a micro switch, it will be produced without wiring
72. Both the ejector and the slider are actuated by the oil cylinder. There is an ejector rod under the slider, and the neutron tubing is not connected according to the mark, or the tubing is connected at the same time (the slider is damaged).
73. Use a hook or a sling, the ring is not tightened, the hook or sling rotates with the mold, the ring and the mold are easy to fall off;
74. If the hot mouth is blocked, knock it with a copper rod.
75. The material is leaking. Increase the pressure speed of the shooting seat and hit the mold.
Exception handling
76. If the nozzle heating ring is broken, use a gun to burn it.
77. Mold clamping is not smooth, use high pressure and high speed to rush (not confirm whether the mold is incorrect or lack of lubrication);
78. The screw speed is slow, use high pressure and high speed to rotate (not to confirm whether the temperature is appropriate);
79. If the product is dissatisfied, use high pressure and hard press (not to confirm whether the temperature is appropriate);
80. The nozzle and flange cannot be removed, so use an afterburner to knock it hard;
81. When the mold is lowered, the positioning ring is stuck and the hard top is seated;
82. The product is glued to the mold, and a copper rod is used to hard pry;
83. The nozzle is clogged, and the product is not full enough to put pressure on --- do not remove the nozzle;
84. When loading a large mold, be afraid that the mold is not safe --- Use a particularly long afterburner to press hard;
85. During production, if the oil temperature or material temperature deviation is adjusted, the upper and lower limit range will be increased-the reason is not checked;
86. During normal operation, if there is a problem with the product, adjust the parameters --- do not analyze the reason: such as the mold temperature rise;
87. Turn off the alarm function when the manipulator always alarms---do not eliminate the fault;
88. Pull out the thermocouple if the machine oil temperature is too high
89. When the slider does not slide smoothly, just loosen the slider screw and continue production without checking!
90. The mold core is not well sealed, and a slight water gushes out. Due to the small batch size, it is barely produced, which causes the etched surface to rust;
91. The mold core parts are loose or damaged, because the quantity to be produced is not too much, and the production is reluctant, resulting in damage to other modules and increasing the difficulty of repair.
92. The product sticks to the mold and burns directly on the mold with a fire gun;
93. The upper die does not confirm the thimble reset confirmation switch
94. In the case of no flash on the product, a higher clamping force is used;
95. When trying a new mold, the first mold fills up the product.
96. If you are dissatisfied, you will desperately add materials.
97. In order to increase the cycle time, desperately increase the pressure and speed of mold opening and closing!
98. The power cord is not tied up after changing the heating coil.
99. Press and hold the safety door switch by hand to operate the machine without stop rod;
100. If the hopper is difficult to discharge, no magnetic stand is needed;
101, injection molding machine, reverse operation side operation
102. If the mold is not closed, the shooting table moves forward.
103. There is no low-voltage protection or failure of low-voltage protection for mold clamping.
104. The safety door fails, and production continues with danger.
105. For equipment with a two-hand brake switch, short-circuit one and complete it with one hand (such as a vertical injection molding machine).
106. Many people operate the machine at the same time.
107. When the motor is just started, press the operation key to do the action.
108. Use a grinder on the machine to exhaust.

 
 
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