Three-layer divided-flow hot runner rack

Abstract

The invention relates to a three-layer divided-flow hot runner rack comprising a hot runner rack in which a main gate is arranged. The invention is characterized in that a layer of first runner, a layer of secondary runner and a layer of third runner are arranged in the hot runner rack, wherein the first runner is communicated with the main gate; first blanking holes are arranged in the first runner and are communicated with the secondary runner in which secondary blanking holes are arranged; the secondary blanking holes are twice or more than twice as many as the first blanking holes; the secondary blanking holes are communicated with the third runner; and discharge holes twice or more than twice as many as the secondary blanking holes are arranged in the third runner. The scheme uses the integration of the three layers of runners and the multi-layer hot runner, outlets in the hot runners progressively increase in a ladder form, and the discharge holes of the third runner are uniformly distributed on the lower surface of the hot runner rack, as well as flow is in balance, thereby causing the arrival time of each point position of a product gate to be consistent so as to cause products to reach smoothness, sufficient injection molding, high intensity and long service life.

Description

technical field [0001] The invention relates to a three-layer diversion type hot runner frame of a plastic mold, which is especially suitable for injection diversion of large-area sewage treatment diaphragms or large plastic trays. Background technique [0002] In the process of environmental sewage treatment, filter membranes are needed. The size of the membrane area determines the sewage treatment area, so the membrane area should be made as large as possible. Due to the large area of ​​the diaphragm, and the surrounding walls of the product are thicker and the middle wall is thinner, the flow of the molten plastic in the existing hot runner structure cannot reach a balance when the diaphragm is injected, and insufficient injection molding is prone to occur, resulting in uneven products. On the other hand, with the development of the logistics industry, it is necessary to use large plastic pallets when unloading or storing. Large plastic pallets have a large area and store...

AI Technical Summary

Problems solved by technology

However, in the production process, due to the large area of ​​the tray, the existing tray adopts a single-layer or double-layer shunt structure during injection molding, which may easily cause insufficient injection molding, reduce the strength of the tray, and shorten the service life.

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