Silicone/Rubber Parts Improve The Roughness Of The Mold

Silicone/Rubber Parts Improve the roughness of the mold

In the silicone products will encounter such a problem, that is, when the silicone products just came out (or there are waste heat when Hou) careless hand touch, in the above left after the fingerprints how rub can not erase. But the temperature of the product down to room temperature and then touch up, still will leave a fingerprint, but it is easy to erase. In addition to the product just to do when the product and product contact with the place will also have more than India, the product is dark and dark products and finish is very high, a little impression is easy to expose.

Such a kind of silicone products such as high surface finish, a little finger or prints are seriously affected the appearance of the product, so to solve similar problems such as silicone finger mold is necessary. Here are some suggestions for you:

1. If the product does not require the brightness of the words, you can improve the roughness of the mold or mold surface sandblasting, can solve the above problems.

2. The appropriate reduction in the amount of softener in the formula or the use of reactive softening agent. Silicone products produce bubbles and stomata Main reasons: 1, is the raw materials; 2, is the processing technology.

As the raw material caused by the air bubbles, including raw rubber, with the agent itself contains water, easy to produce and chemical reactions generated by the gas. The most prone to bubbles in the compounding agent is a plasticizer (including a softening agent). Because plasticizers are mostly fats and oils, containing low-temperature volatile substances and water; which pine tar, coal tar more. In order to remove the water, silicone products processing manufacturers often in the mixing before the pine tar, coal tar heating and evaporation. Even so, the volatile and low molecular substances in the plasticizer will still evaporate during the heating or vulcanization, resulting in pores or bubbles.

Carbon black and clay and other reinforcing fillers contain some water and adsorption gas is also one of the reasons for the bubble produced silicone products. Recommended reading: "Carbon black on the effectiveness of rubber and filling the impact of the system"

Fiber and steel cords are also an important factor in causing bubbles, and the fibers and wires themselves have air and moisture. A variety of products do not often produce bubbles, because the compound is dispersed and dissolved in the gas and water, through the skeleton material, to the low pressure direction and the collection caused by the.

In the processing technology, the production process in the bubble more factors; it can be said that most of the silicone products are caused by improper operation of the bubble.