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Dear TPE raw material purchasers, hello! I am Zhang Huimin, and today is December 30, 2017. 2017 is nearing its end, but it cannot prevent me from sharing TPE/TPR material information with you. So let's share the problem of TPE/TPR material molding today. When TPE/TPR soft rubber is molded, there will be the problem of sticking the mold, which will have certain influence on the products to be molded. Especially when overmolding ABS,PC and other plastics, besides TPE material (base material and compound) factors, the mold and molding process should be properly adjusted, and can also be improved and solved. The following will introduce how to solve the TPE|TPR soft adhesive molding die.
First, the mold:
1. Carry out electric discharge machining on the gate bushing to retain certain thickness of electric discharge lines and reduce the adsorption force of the runner;
2. As soft glue, the runner thimble adopts the inverted shape of runner pin to increase the strength of runner pulling. The angle of inversion can be started from a small age and tested slowly. If a general Z-shaped needle is used, the pulling force may not be enough, resulting in the flow passage sticking to the master mold;
3. The male mold should be polished to mirror surface as much as possible to increase the adsorption force, which is also the opposite of hard glue resin.
4. The draft angle of the male mold can be made small in an appropriate amount, or not at all. If allowed, even reverse draft can be made.
5. Cross ribs can be added to the head of the thimble.
Second, we can also start with the molding process:
1. The mother mold can be connected with high mold temperature and the male mold with low mold temperature.
2, on the male mold release agent, pay attention to the dosage of release agent, so as not to affect the appearance of products.
3. TPE material is an important part. The formula should reduce the oil filling ratio as much as possible. The essence is to make the oil filling ratio appropriate and paraffin grade oil will be better. It is also very important to select SEBS and SBS of appropriate brand.
4. Adjust the TPE compounding system properly to reduce the adhesion between the product and the mold and facilitate demolding.
The above is based on two main points to introduce TPE,TPR material (soft glue) how to solve the adhesive mold, hope to be able to help you, if you have any questions, please contact our online customer service. If you are developing TPE/TPR raw material related products and need one-on-one technical guidance, please call at any time: 13827209711 (ms Zhang) and we will serve you wholeheartedly!
