The difference between white mold silicone and translucent mold silicone

Translucent mold silica gel is mainly filled with fumed silica, white silica gel is mainly filled with calcium carbonate, silica powder, titanium dioxide, zinc oxide, part of which contains precipitation silica, due to the meteorological silica market ** is generally 30 yuan a kilogram, imports can reach more than 100, ordinary calcium carbonate filler 15-20 yuan is already good, the main difference between the two is that the filling ingredients are different, except that part of the translucent mold glue itself is added with color powder to become white. In terms of strength, the glue filled with silica is generally stronger, mainly because the silica particle size is relatively small, with a good reinforcing effect, and the glue filled with ordinary filler is mainly used to reduce costs. I'm a glue maker, so I can continue to ask if I don't understand.

Translucent mold silicone: Translucent mold silicone is a mold glue with high tensile and tear resistance. Mold silicone is white and translucent, all belong to the mold silicone, the mold silicone is translucent, and the white mold silicone is made of powder on the basis of translucency.

Translucent mold silicone is more tensile and tear resistant than white mold silicone.

White mold silica gel: white silica gel is mainly filled with calcium carbonate, silica powder, titanium dioxide, zinc oxide, part of which contains precipitation silica, due to the meteorological silica market ** is generally 30 yuan a kilogram, the import can reach more than 100, ordinary calcium carbonate filler 15-20 yuan is already good, the main difference between the two is that the filling ingredients are different.

Plastic mold is an abbreviation for a combined plastic mold used for compression molding, extrusion, injection, blow molding and low foaming molding. It mainly comprises the die with variable cavity that is made up of die combination substrate, die assembly and die combination clamping plate, and punch with variable core that is made up of punch combination base plate, punch assembly, punch combination card plate, cavity truncation assembly and side section combination plate. Coordinated changes in mold convex, concave mold and auxiliary molding system.

It can process a series of plastic parts of different shapes and sizes.

Injection mold is one of the types of plastic molds, plastic molds include: injection molds, extrusion molds, blister molds. Like the injection mold production, the method of injecting plastic material is used, and the mold is opened and then the product is formed.

The injection mold can also be understood as a mold with an empty middle and then a fixed hole on the body, through which plastic material is injected into it, and the product is obtained by heating and forming at high temperature, opening the mold, and obtaining the product.

The silicone mold material itself is soft, with good strength and easy demoulding, and the molded silicone mold has good resilience, good tensile force and strong tear resistance. It is very important for the production process of silicone mold, the selection of mold opening form and the selection of mold line, one is for the convenience of molding; Second, the mold line should be selected without affecting the overall effect of the product; Third, it does not affect the quality of the product, because after the silicone soft mold is made, gypsum or FRP jacket must be made to support the silicone soft mold. Therefore, the silicone mold is still very good, and the commonly used silicone mold model:

HF-308 and HF-318!

Hongfeng silicone engineer said that if it is food-grade silicone, it is necessary to pay attention to anti-poisoning (not to contact with environmentally friendly materials and objects).

The component silica gel should be fully stirred evenly, otherwise it will not cure.

3.The curing agent should be added and blended according to the proportion.

Components A and B must be fully mixed to avoid unevenness, otherwise the performance of the mold glue will be affected.

Components A and B are stored separately, and they must be used up in a short time after being prepared and prepared.

When the original model is made of glass, ceramics or coated with paint, the original model is evenly coated with shampoo solution or soapy water, and after the water volatilizes, the mold glue is poured or brushed, which is conducive to better film removal.

If you need to reduce the hardness of the rubber material, you can add 5-10% of the weight part of group A silicone oil for thin release packaging and storage.

Clear crystal drill liquid mold silicone operation method:

1. Mixing: The base glue and the curing agent are mixed according to the weight ratio of 10:1 or 1:1, and the mixing can be done manually or using equipment.

2. Degassing: The mixed glue should be degassed before filling. When used in small quantities, it can be carried out in a vacuum dryer, under vacuum, the volume of rubber can be increased by 4-5 times (foaming), therefore, the volume of the degassed container should be 4-5 times larger than the volume of the glue, and the volume of the glue will return to normal after a few minutes, and it will be completed when there are no bubbles escaping on the surface (about 10 minutes).

3. Surface treatment: liquid paraffin can be used as a release agent on the surface of the mold or the surface of the potting material to be contacted.

4. Vulcanization and demoulding: the mixed degassed rubber material is cured at 120 5 °C for 30 minutes, 60-70 °C for 2-3 hours, and the curing time at room temperature is 24hr, and the curing temperature and time can be determined according to the process conditions.