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When making the composite insulator mold, there are a lot of problems we are facing.
Below, we list some representative defects we are facing, and also list out the suggestions for how to solve those defects.
For more detailed solving way, you can contact us for further discussion.
| No. | Defects | Reason | How to correct |
| 1 | Silicone shed has not been solidified | 1. The time of sulfurization is too short | 1. Add the sulfurization time. |
| 2. The temperature is low. | 2. Increase the mold temperature. | ||
| Suggestion: Need to adjust according to the parameter giving by rubber material supplier. | |||
| 2 | Sticking the mold | 1. The time of sulfurization is too short, that shed has not been solidified. | 1. Add the sulfurization time. |
| 2. The temperature is too high, the shed broken off and fall into the cavities. | 2. Lower the mold temperature. | ||
| 3. The mold has not been cleaned. | 3. Clean the mold carefully. | ||
| Suggestion: Need to adjust according to the parameter giving by rubber material supplier. | |||
| 3 | Incompletely filled part | 1. The amount of glue injected is not enough for the product。 | 1. Increasing the amount of gule injected |
| 2. There is glue leakage in the die cavity | 2. Find out the glue leakage place, and fix it to make sure there will be no glue leakage anymore. | ||
| 3. The cold runner temperature is too high, the glue is vulcanized in the cold runner. | 3. Re-cleaning the cold runner, and lower down the cold runner temperature. | ||
| 4 | Cutted shed surface（sheds fracture） | 1. The temperature is too high. | 1、Lowering the temperature. |
| 2. The time of sulfurization is too long. | 2. Reducing the time of sulfurization. | ||
| 5 | Burr | 1. Amount of glue is too much. | 1. Reducing the amount of glue. |
| 2. High injection pressure. | 2. Reducing the injection pressure and increase the clamping pressure | ||
| 3. There are sundries on the parting surface of the mold | 3. Removing mold surface sundries. | ||
| 6 | The rubber is too much in the joint | 1. The amount of glue has not been well controlled. | 1. Control the amount of glue well. |
| 2. The runner damper plug screw is not properly adjusted. | 2. The channel damper plug screw is adjusted upward to reduce this part of the glue | ||
| 7 | Central position incision | 1. Insufficient pressure in the cavity。 | 1.Increase the injection pressure and the amount of glue, so that the rubber inside the mold cavity can be high pressure. |
| The root of the shed and the housing position have confluence trace, do not confluence. | 2. Slow injection speed | 2. Increase the injection pressure, so that the glue quickly into the mold cavity. | |
| 8 | Uneven wrapping along the core road()（Core rod eccentric） | 1. The clamping position is not set properly | 1. Readjust the position of the core pulling chuck |
| 2. The device action is not set properly. | 2. Reset the device action | ||
| 9 | Slider pin cannot retract | 1. Checking the equipment parameters are set correctly or not. | 1. Reset device actions (parameters) |
| 2. Checking the equipment action sequence is set correctly or not. | 2. Reset the device action. | ||
| 10 | The glue comes off at the joint | 1. The interface is not cleaned and there are sundries. | 1. Clean up the interface location |
| 11 | The core rod is damaged in the molding process (the core rod is broken when the product is out of the mold) | 1. Excessive bending when the product is out of the mold | 1. Pay attention to the bending degree of the product when ejecting, and the deviation between high and low should not be more than 100mm. |
| 2. An external force breaks off like a crowbar | 2. The Angle of crowbar should not be greater than 25° | ||
| 12 | Shed overhang slant | 1. The temperature is too high. | 1. Lower the temperature. |
| 2. The time of sulfurization is too long. | 2. Reducing the time of sulfurization. | ||
| Suggestion: Need to adjust according to the parameter giving by rubber material supplier. | |||
| 13 | there are bubbles | 1、The amount of glue is not enough。 | 1、Add the amount of glue. |
| 2. There is no exhaust at the end of injection. | 2. Increase the frequency of equipment exhaust | ||
| 3. The mold has not been cleaned. | 3. Clean the mold carefully. |
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