Point pouring type high-efficiency and high-accuracy injection mold

Abstract

The invention discloses a point pouring type high-efficiency and high-accuracy injection mold. The point pouring type high-efficiency and high-accuracy injection mold comprises a plate frame. A hydraulic rod, a fixed mold and an injection device are installed on the plate frame. A movable mold is fixedly connected with the right end of the hydraulic rod and located on the exactly left side of thefixed mold. The fixed mold comprises a base plate, wherein the base plate is located at the bottom of the fixed mold. Three point pouring gates and three mold inlets are formed in the right side and the top surface of the base plate correspondingly, and connected through circular channels. The injection device comprises a rod sleeve. A feeding hopper is connected with the top side of the rod sleeve, an air pressure rod is arranged on the right side of the rod sleeve, and an injection port is formed in the left end of the rod sleeve. The air pressure rod is inserted into the rod sleeve, and a piston sleeve is connected with the outer side of the air pressure rod. A main material pipe is connected with the left end of the injection port and connected with three branch material pipes, and theleft ends of the branch material pipes are inserted into the three point pouring gates correspondingly. The feeding speed is high, feeding is stable, the production efficiency is high, a mold cavitycan be filled with raw material solutions, precision machining of products can be accomplished, and the machining quality of the products is high.

Description

technical field [0001] The invention relates to the technical field of high-resolution materials, in particular to a point-casting high-efficiency and high-precision injection mold. Background technique [0002] Injection molds are divided into thermosetting plastic molds, automobile molds and thermoplastic plastic molds according to the molding characteristics. Compression molds can be divided into three types: overflow type, semi-overflow type and non-overflow type according to the overflow method. The injection mold can be divided into two types: cold runner mold and hot runner mold according to the gating system. Type and fixed type. [0003] Advantages of the point gate of the mold: because the gate is small, the mold is automatically broken after the product is formed, and there is no need for post-processing of the gate, which is less post-processing than the side gate. Its disadvantages are: because the gate is very small, it is not suitable for large products and ...

AI Technical Summary

Problems solved by technology

[0005] (1) Due to the limited amount of raw material solution entering the point gate and the slow feeding speed, the product often does not fill the mold, resulting in missing corners or edges after the product is released from the mold, the product quality is not good, and the drip pouring method from top to bottom Not only will the raw material solution be doped with air, so that air bubbles will be generated in the molded product, but the dripping solution will splash on the bottom surface of the mold cavity, resulting in uneven raw material solution in the mold cavity, greatly reducing product quality, and The mechanical strength is also unqualified

[0006] (2) The fluid channel of the existing injection mold adopts a rectangular channel or a trapezoidal channel. When the fluid passes through the corners of the rectangular or trapezoidal channels, the force on the corners is greater than that of the surface, causing the corners to be easily broken and affecting the feed rate. , which in turn affects the quality of mold processing products

[0007] (3) The injection device of the existing injection mold usually drives the screw to rotate through the rotation of the motor, so that the screw pushes the piston to make the solution flow into the mold cavity, but the friction of the screw rotation is relatively large, the wear is large, and the speed of the piston sleeve is relatively high. Slow, it is difficult to provide a certain pressure and speed to the solution, it is difficult for the solution to fill the cavity, and the product quality is poor

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