The clamping force refers to the large clamping force that can be applied to the mold by the mold clamping structure of the injection molding machine. It is set in order to resist the expansion force that occurs when the molten rubber fills the mold under a high injection pressure. During injection molding, the concave and convex molds are tightly closed together, and then the molten plastic is injected into the cavity. In order to avoid the mold parting surface being pushed open by the cavity pressure, it is necessary to apply a clamping force to the mold, otherwise the parting surface will overflow, resulting in flashing of the product and greatly reducing the product yield. However, too much clamping force will not only increase the wear of the mold, reduce the exhaust effect in the cavity, cause the product to scorch or lack of material, but also improve the requirements for the injection molding machine: the machine is added with force, the wear is increased, and the shortened In addition to the mold clamping structure and the life of the hydraulic system, power spoilage will also be formed.

In addition to the unstable clamping force of the machine itself, it will reduce the yield of the product and shorten the service life of the injection molding machine. The processing accuracy of the mold is not good enough, and the parallelism is not high enough. When the partial load is severe, it even causes the injection molding processing rod of the injection molding machine to crack, which stops the production and brings unnecessary losses to the enterprise.