Multilayer runner spreader plate with insert, hot runner system and insert manufacture method

Abstract

The invention relates to the technical field of hot runner system, and discloses a multilayer runner spreader plate with insert, a hot runner system of the spreader plate and an insert manufacture method. The spreader plate comprises a main spreader plate and at least a layer of insert set. The spreader plate and inserts of the insert set are sequentially overlapped to form a spreader plate with a multilayer structure. The main spreader plate is equipped with a main runner, and the insert set is equipped with sub-runners capable of communicating with the main runner. The spreader plate of the invention is disassembled into the main spreader plate and multilayer insert sets, and is comprised of a plurality of small units, so that a complicated runner of the spreader plate can be disassembled into a plurality of simple sub-runners to make the manufacture of the spreader plate easy and reduce manufacture costs. The runner consists of a plurality of simple sub-runners, so as to reduce a flow approach of a plastic melt in the runner, reduce injection moulding pressure, lower costs, and avoid glue leakage during spreader plate working process and material waste in spreader plate manufacture.

Description

technical field [0001] The invention relates to the technical field of a hot runner system in injection molding, in particular to a method for manufacturing a multi-layer flow channel splitter plate and an insert with low cost and simple manufacture of an insert combination. Background technique [0002] The multi-layer runner manifold is the central component of the whole hot runner system. The manifold is in a heated state, and the plastic melt passes through each runner in the manifold, diverted and transmitted to each nozzle, and then reaches the cavity of the mold. [0003] In the hot runner system, the shape of the manifold depends on the flow direction of the plastic melt in the runner and the number and distribution of the nozzles, so the shape of most manifolds is irregular. In the traditional processing technology, the manifold is usually It is made by taking a piece of monolithic steel, forming it through a machining center or wire cutting, and then drilling it wi...

AI Technical Summary

Problems solved by technology

When manufacturing the manifold of a multi-cavity product mold, it is necessary to make the injection volume of each cavity consistent, so it is necessary to design the flow channel in the manifold into multiple layers. The conventional method is to use two independent layers. or multi-layer splitter boards are superimposed, so that several splitter boards need to be manufactured. This method has the following defects: First, the manufacturing cost of the splitter board is greatly increased, and the manufacturing cost of the mold is also greatly increased. At the same time, the thickness of the mold has also increased a lot. In this way, the tonnage of the injection molding machine that pours the plastic melt into the manifold is also greatly increased, the cost of purchasing the machine is increased, and the electricity bill is increased; secondly, the difficulty of manifold assembly is increased. , it is easy to leak glue during use, causing heavy losses, and the manifold is formed by wire cutting and then processed by deep hole drilling. In this way, it is necessary to cut steel other than the shape of the manifold, which is easy to cause waste, increase processing difficulty, and lead to an increase of more than 50% in processing costs; thirdly, the flow channel in the existing manifold is processed by gun drilling, so that the corners inside the manifold and the intersecting parts of multiple flow channels cannot be polished , it is easy to produce sharp edges and sharp corners, which is often said to be the "dead corner area" where the melt is easy to stay. When the plastic melt passes through this area, the remnants of the plastic melt are easy to deposit here, and it is difficult to purify and clean thoroughly. , easy to cause color mixing, unable to meet the color change requirements of injection molded products

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