Understand several key methods for the production of silicone products!baby pacifier clips Vendor

　　Nowadays, the production process of silicone products can be said to be the most common type of molding vulcanization process. Its production method is simple, the product quality is good, and it is the most convenient and fast process for mass production. There will also be some in our production process. Common problems need to be dealt with, and it is also a basic understanding for the production of the molding process. The following introduces some key production points in the molding process. You can also find a way to solve the problems encountered in the future production. We You can learn from the following points: pressure, temperature, time, material, material, weight!

　　1. The pressure of the molding machine refers to the set pressure of the molding vulcanizer. It is controlled by a pressure gauge and a computer. The sufficient pressure can make the rubber material completely press into the mold when the mold is closed, and prevent the vulcanization of the rubber during vulcanization. The material produces a small amount of moisture to generate air bubbles, and the product air bubbles can be controlled with exhaust. The hardness of the rubber compound is high and the fluidity is poor, so the selected pressure should be large. If the pressure is too high, it is easy to crush the die edge. The size of the pressure is related to the size of the die. If the die is small, the pressure should be reduced accordingly to prevent the die and vulcanization. Machine plate deformation. When adjusting the pressure of the vulcanizer, the maximum pressure of the vulcanizer should not exceed the maximum pressure of the vulcanizer, otherwise the machine will be damaged. The empty mold is not pressurized (except for the injection mold), which is an effective measure to protect the mold edge and prolong the life of the mold.

　　2. The temperature of the machine is controlled, and the molding temperature: when the formula is fixed, the temperature is the basis for the vulcanization and immaturity. The vulcanization speed is slow, and the time must be extended; the temperature is higher than 180 degrees, the vulcanization speed is very fast, and the output is high, but it is easy to cause mold dirty, shiny, product deformation, small size, thin thickness exceeding the standard, brittle burrs, etc.

　　3. The control of molding vulcanization time, time is the most important in the production process of silicone products, and the length of vulcanization time directly affects the quality of the product. The vulcanization time is short, the product is not fully cooked, the deformation is large, it is easy to turn white, and the product is not durable; if the time is too long, the product will be over-sulfurized, the strength and hardness will deteriorate, resulting in brittleness or sticky surface; the relationship between temperature and time must be It is formulated according to the thickness of the product and the type of rubber. Thick products must be vulcanized at low temperature for a long time. If it is found that the time is not enough after the mold is released, the product is not cooked and sticks to the mold, and it is difficult to remove the mold and wash the mold. Vulcanization, which basically sticks the material down. One of the biggest problems in molding is that the employees adjust the machine without permission and cause waste.

　　4. Operation speed: refers to the operation speed of the vulcanizer when placing the glue and taking the product. Rubber vulcanization is a chemical reaction. The rubber compound will begin to vulcanize when it is placed on a hot mold. For a product with multiple cavities, from the first piece of glue to the last piece of glue, the shorter the time of placing the glue, the better. The mold should be closed immediately, otherwise, various abnormalities such as mold dirty, rubber burning, thick burrs, deformation, etc. may occur easily. When picking up the product, it is easy to blow out the product with pneumatic assistance, but it will reduce the temperature of the mold. If the operation is not skilled, it is most likely that the mold temperature is getting lower and lower, resulting in unfamiliar products and sticking to the mold. Novices are most likely to have this problem. In the production of glossy plastic sheets, the speed of gluing, mold clamping and mold opening has the most obvious impact on the quality of the glossy surface. Why some products with strict appearance requirements choose to hang the mold operation, one of the main principles is also here!

　　5. Product placement problem: refers to the pre-formed shape of the rubber compound, which can be a long strip, a small square, or a circle. The thickness, length and width of the rubber must be close to the product. The closer the shape of the rubber is to the shape of the product, the shorter the flow time of the rubber in the mold, the shorter the flow distance, the thinner the burr, and the greater the amount of rubber used. less, the higher the qualified rate of the product;

　　6. Compound weight: The weight of the compound must be greater than the weight of the product, otherwise there will be a lack of glue. However, the more sizing material is put, the thicker the burrs of the product will be, and the size will become larger. The weight of the compound is directly related to the shape of the compound. How to use the least amount of glue and produce in the most reasonable shape without lack of glue is the embodiment of the technical level of the molding staff. The weight of the rubber compound is enough, but the length is longer than that of the mold, and there will also be a lack of glue. The problem of glue and thick burrs on one side. The shape of the rubber compound is suitable and the total weight is suitable, but the thickness and width of the cut are not uniform, or the glue filling is not uniform, which will also cause a lack of glue. When there is a lack of glue in the product, do not rush to increase the glue material. First, you should take a complete mold including burrs, check the weight, and then see if the thickness of the product is uniform, and finally decide whether to add material. The technical content and experience of the forming foreman is very important!

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