Injection mold and injection molding method for automobile headlight light guide strip
A technology of automobile headlights and light guide strips, applied in the field of injection molding, can solve problems such as low yield rate, unsatisfactory filling, damage during demoulding and ejection, and achieve high yield rate and simple and reliable structure
Active Publication Date: 2016-05-25
宁波雷邦机械科技有限公司
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Problems solved by technology
[0003] The purpose of the present invention is to overcome defects such as mold dissatisfaction, shrinkage, damage during demoulding and ejection of the current automobile headlight light guide strips that are easily produced by injection molding with traditional injection molds, and have the disadvantages of low yield rate. To provide an injection mold and injection molding method for an automobile headlight light guide strip, which is not prone to defects such as filling dissatisfaction, sinkage, demoulding, and ejection damage after injection molding, and has a high yield rate
Method used
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[0017] The present invention will be further described below with reference to the drawings.
[0018] As attached figure 1 , Attached figure 2 , Attached image 3 Shown: an injection mold for the light guide strip of an automobile headlight, including a fixed mold 3 with an upper composite plate 1, a lower composite plate 4, a mold foot 23 and a movable mold 5 connected by screws in turn, a refill device; a fixed mold 3 It is enclosed with the movable mold 5 to form a cavity 2; the fixed mold 3 is provided with three needle valve hot runners 31 arranged along the length of the cavity 2 and injected into the cavity 2 in order during operation; a lower composite plate 4 A secondary ejector assembly is provided between the movable mold 5 and the movable mold 5.
[0019] The secondary ejector assembly includes an upper ejector plate 6 provided with three secondary ejector pins 61, and a lower ejector plate 7 provided with four primary ejector pins 71 passing through the upper ejecto...
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Relating to the field of injection molds, the invention aims to provide an automobile headlight light guide strip injection mold and an injection molding method. The automobile headlight light guide strip injection mold comprises an upper compound plate equipped fixed mold, and a lower compound plate, a mold foot and a movable mold that are connected in order. A cavity is formed between the fixed mold and the movable mold. The fixed mold is equipped with at least two needle valve type hot runners that are arranged along the length direction of the cavity and perform injection molding to the cavity sequentially during work. A two-time ejection assembly is disposed between the lower compound plate and the movable mold. With the automobile headlight light guide strip injection mold, insufficient mold filling, shrinkage depression, demolding, damage during ejection and other defects are not easy to appear in the injection molded automobile headlight light guide strip, and the yield is high. And the injection molding method of the injection mold can satisfy the requirements of difficult generation of insufficient mold filling, shrinkage depression, demolding, damage during ejection and other defects to the injection molded automobile headlight light guide strip and high yield.
Description
Technical field [0001] The invention relates to the field of injection moulds, in particular to an injection mould and an injection method for an automobile headlight light guide strip. Background technique [0002] Attached Figure 4 Shown is a light guide strip for automobile headlights. Due to the long length and complicated shape of the light guide strip for automobile headlights, one end surface has a zigzag refracting curved surface; the light guide strip for automobile headlights is injection-molded by a traditional injection mold. It is easy to produce defects such as filling dissatisfaction, shrinkage, demoulding and damage during ejection, and has the disadvantage of low yield. Therefore, designing a car headlight light guide after injection molding is not easy to produce filling dissatisfaction, shrinkage, Defects such as damage during demolding and ejection, and injection molds and injection methods for automotive headlight light guides with high yield have become prob...
Claims
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IPC IPC(8): B29C45/26B29C45/40
CPCB29C45/0025B29C45/2602B29C45/401B29C2045/4063B29C2045/4084
Inventor 张振岳
Owner 宁波雷邦机械科技有限公司