Divided-flow secondary injection flow passage device of ejection forming machine

Abstract

The invention discloses a divided-flow secondary injection flow passage device of an ejection forming machine, which comprises a machine barrel nozzle, an injection cylinder assembly and a flow passage connector connected to the output end of the machine barrel nozzle and the input end of the injection cylinder assembly; an injection rod capable of moving along the axial direction of the injection cylinder assembly is arranged in the injection cylinder assembly; the injection cylinder assembly is internally provided with two storage flow passages corresponding to the end parts of the injection rod; and the output end of the inner cavity of the flow passage connector comprises interfaces matched with the two storage flow passages. The problem of remaining remainder is radically solved, and the quality of the products is effectively ensured. In addition, the process regulating range is wider, and the production efficiency is favorably improved.

Description

technical field [0001] The invention relates to the technical field of injection molding, in particular to a split-flow secondary injection channel device for an injection molding machine. Background technique [0002] Injection molding equipment is a device that makes thermoplastic or thermosetting materials into various shapes of plastic products using plastic molding molds, and is widely used in industrial production. [0003] At present, in order to improve production efficiency, more special-purpose high-performance injection molding equipment adopts two-stage injection technology, so that sequential steps can be carried out simultaneously to achieve higher production capacity than ordinary injection molding equipment, such as figure 1 As shown, it is a longitudinal sectional view of an existing injection molding machine using two-stage injection technology. The molten rubber in the melt rubber cylinder 11 is first injected into the lower injection cylinder 13 through t...

AI Technical Summary

Problems solved by technology

[0003] At present, in order to improve production efficiency, more special-purpose high-performance injection molding equipment adopts two-stage injection technology, so that sequential steps can be carried out simultaneously to achieve higher production capacity than ordinary injection molding equipment, such as figure 1 As shown, it is a longitudinal sectional view of an existing injection molding machine using two-stage injection technology. The molten rubber in the melt rubber cylinder 11 is first injected into the lower injection cylinder 13 through the single flow channel in the flow channel connector 12. , after the mold clamping is completed, the injection rod 14 moves forward to perform the injection action. The flow of the molten rubber material is shown by the arrow. After the injection is completed, a certain amount of rubber material will remain at the front end of the injection rod 14. After repeating the above actions, the residual material at the front of the injection rod 14 stays for a long time, degrades due to the influence of temperature, and mixes into the mold cavity to cause various defects in the product

[0004] Some manufacturers also reduce the temperature of the rubber material, that is, reduce the heating of this part. Although it can reduce the occurrence of the above-mentioned defects to a certain extent, the lower temperature of the rubber material has a negative impact on the injection speed, reduces the production efficiency and cannot fundamentally solve the problem. residual material retention

[0005] For some special molding equipment that requires high production efficiency and strict product quality requirements, the above defects are particularly important, and it often results in unqualified products in the entire batch.

Images