Rubber and plastic pipe double-layer co-extrusion mold

Abstract

The invention provides a rubber and plastic pipe double-layer co-extrusion mold. The rubber and plastic pipe double-layer co-extrusion mold comprises a mold tube. The mold tube is internally providedwith a blowing cavity. The outer side of the mold tube is sleeved with a first extrusion part and a second extrusion. The first extrusion part is internally provided with a first mold cavity. The second extrusion part is internally provided with a second mold cavity. The inner wall of the front end of the mold tube is provided with an internal thread. The outer sidewall of the front end of the mold tube is provided with a first conical boss. The front end of the first extrusion part is provided with a first groove. The bottom of the first groove is provided with a first conical groove. The first conical groove communicates with the first mold cavity. The rear end of the first extrusion part is provided with a second conical boss. The second conical boss is provided with a first outlet communicating with the first mold cavity. The front end of the second extrusion part is provided with a second groove. The bottom of the second groove is provided with a second conical groove. The rear end of the second extrusion part is provided with a second outlet communicating with the second mold cavity. The rubber and plastic pipe double-layer co-extrusion mold has the characteristics that an inner layer and a filling layer are bonded closely, and the rubber and plastic pipe double-layer co-extrusion mold is high in overall structure mechanical strength and distortion resistance and easy toinstall.

Description

technical field [0001] The invention relates to the technical field of rubber and plastic pipes, in particular to a double-layer co-extrusion die for rubber and plastic pipes. Background technique [0002] Various rubber and plastic pipes have more and more applications in many industries, such as gas stove pipes used in the home, water heater pipes, etc. Generally speaking, the inner layer of rubber and plastic pipes belongs to the functional layer, which determines the performance of rubber and plastic pipes. In the field of application, the other layers other than the inner layer are to increase other series parameters of the rubber and plastic pipe. The material of the inner layer is often the best, so the cost is higher. In order to reduce the production cost, on the premise of ensuring the quality, the inner layer The outer side is wrapped with a padding layer. [0003] The existing technology of wrapping the filling layer mainly has the following problems: first, the...

AI Technical Summary

Problems solved by technology

[0003] The existing technology of wrapping the filling layer mainly has the following problems: first, the method of wrapping the filling layer is mostly to produce the inner layer first, and then glue the filling layer to the outside of the inner layer. Such a wrapping method is not strong enough and is not resistant to twisting , the separation between the inner layer and the filling layer is easy to occur, which affects the product quality; the second is that some parts are wrapped by double-layer extrusion, and the structure of the double-layer extrusion mold used is complex and not easy to install

Images