Precision mold for multiple times of injection of single melt

A technology of multiple injections and precision molds, applied in the field of injection molding molds, rubber and plastic injection molding molds, can solve problems such as difficulty in adapting to small batch production, high mold cost, long manufacturing cycle, etc., to achieve precision and automatic control, Save equipment and mold costs and achieve the effect of precise size control

CN107738409AActive Publication Date: 2018-02-27AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2018-02-27

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Abstract

The invention belongs to the technical field of rubber and plastic injection molding molds, and relates to an injection molding mold, in particular to a precision mold for multiple times of injectionof single melt. According to the mold, insert guide rails of an outer drive mold are adopted for indirectly controlling the change of the size of a mold cavity; a sprue cutoff device is adopted by themold and can cut off a cold sprue of the single time of injection of the single melt, and it is guaranteed that a runner is smooth at next time of injection; and the insert guide rails cooperate withthe sprue cutoff device, multiple times of injection molding of the single melt can be completed, and size precision control of an ultralarge-thickness or variable-thickness product is achieved. According to the precision mold for multiple times of injection of the single melt, the melt filling and densification process of the ultralarge-thickness or variable-thickness precision product can be effectively achieved, research and development of related new products are facilitated, and a multi-color injection molding machine is not needed; and the mold structure is simple, the equipment and mold cost is saved, and the mold is suitable for production of multiple varieties and small batches of products.
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Description

technical field

[0001] The invention belongs to the technical field of rubber and plastic injection molding molds, and relates to an injection molding mold, in particular to a precision mold for multiple injections of a single melt. Background technique

[0002] Observation windows in the deep sea exploration and aerospace fields, oil pipeline fittings in the petroleum and petrochemical field, and large water treatment filter plates in the environmental protection field are all relatively thick (the thickest can reach nearly 100 mm). The shrinkage rate is large, and defects such as surface sink marks, local vacuum bubbles, and warping deformation often occur during the injection molding process, which requires comprehensive consideration from product design, process optimization, and mold design. It is technically difficult to produce the above-mentioned ultra-thick-walled products by traditional injection molding, and the corresponding manufacturing cycle is long and the mo...

Examples

Embodiment Construction

[0017] Attached below Figure 1 ~ Figure 4 The present invention will be further elaborated through specific examples, wherein the examples are descriptive and not restrictive, and cannot limit the scope of protection of the present invention.

[0018] figure 1 For the overall schematic diagram of the precision mold proposed by the present invention, as figure 1 As shown, the precision mold consists of the following parts from top to bottom: positioning ring 1, fixed template 2, fixed mold hot runner plate 3, fixed mold support plate 4, fixed mold insert adjustment plate 7, gate removal plate 8, The movable mold insert adjustment plate 9, the movable mold support plate 10, the ejector pin 11, the ejector plate 12, the movable mold back plate 13, the insert position adjustment servo cylinder 5 and the gate removal hydraulic cylinder 6. This embodiment focuses on the part of the precision mold that involves the realization of multiple injections of a single melt, omitting othe...