Injection molding technology is widely used in industrial production. It is inevitable that various abnormal problems will occur during the production process. Among them, the sticking of injection molded parts is a common abnormal problem in production. The cause is relatively simple, but if it is dealt with Improper, it will be particularly time-consuming; the phenomenon of sticking will occur during the production process, and failure to pay attention will cause bad batches, which will not only affect the production schedule, but also cause a lot of waste. Guangzhou Aote Engineering Plastics Co., Ltd. has excellent injection mold processing technology and provides plastic parts processing.

The main reasons for the sticking of injection molded parts are as follows:

First, the reason for the mold

The mold cavity or the inner wall of the reinforcing rib is not smooth, and the mold sticking caused by the excessive ejection resistance of the injection molded part;

Second, the reason for the process

The setting of the injection molding process is unreasonable, so that the product sticks to the mold cavity, the sticking place is moving, and the fixed mold is possible;

Among them, it is mainly divided into the following two situations:

1. The injection pressure is too large, the holding force is too large, and the injection time is too long, so that the molten resin is fully injected into the mold cavity, and the resistance of the production of injection molded parts is too large when demolding, and some of the injection molded parts remain in the mold cavity. £»£»£»£»£»£»

2. Insufficient cooling of the injection molded parts, the injection molded parts have not been completely cooled and shaped during demolding, and part of the injection molded parts remain in the mold cavity when the injection molded products are ejected;

Three, when starting up and debugging

When the machine is turned on, the mold temperature is lower than that in normal production, the resin fluidity is poor or the injection is insufficient to fill the mold cavity during debugging, and part of the injection molded part is injected. When the product is ejected, the incomplete product is unbalanced and mold sticking occurs;

In view of the above-mentioned reasons, there are the following improvement plans:

1. The mold sticks to the mold cavity for polishing treatment;

2. The injection molding process is optimized, and the corresponding injection pressure, pressure holding, and injection time are adjusted reasonably;

3. Adjust the cooling time longer, and then slowly reduce the cooling time according to the production situation, and finally fix it;

4. When starting up, when debugging production parts, it is better to adjust about 90% of the injection cavity; secondly, spray some release agent before starting up; especially where the mold is easy to stick;

How to deal with mold sticking in the production of injection molded products:

In the case of mold sticking during production, do not rush to deal with it, observe and analyze it, and proceed with the easy and difficult processing method.

1. When the area of the glued product is large, and the glued product is not misaligned, you can manually close the mold again, (or put a piece of tissue paper, not thick), close the mold tightly, and see if it can be brought out product;

2. Use a soft copper rod to grind, and pry out from the surrounding parting surface in a balanced manner;

3. For deep reinforcing ribs or holes, use a gun or gas to burn the flat strips, insert the iron wire into the sticky mold and cool it out slowly;

4. Disassembling and disassembling the mold cavity and sticking the mold;

Summary: The sticking of injection molded parts is one of the most common abnormalities in injection molding production, which often occurs in production; the operator should continuously summarize experience according to the reasons, and reduce or eliminate the occurrence of sticking of injection molded parts; also continue to summarize Improve the skills in handling the sticky mold of injection molded parts, and reduce the downtime caused by the sticky mold to reduce production time and quality problems. Guangzhou Aote Engineering Plastics Co., Ltd. has excellent injection mold processing technology and provides plastic parts processing.