Secondary mould pressing in-mould decorating injection forming method
A technology of in-mold decoration and injection molding, applied in coating and other directions, can solve the problem of low degree of adhesion between processed sheets and plastic materials, and achieve the effect of improving quality
Active Publication Date: 2012-07-25
东莞亿东机器有限公司
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Problems solved by technology
[0003] The purpose of the present invention is to overcome the disadvantage of the low bonding degree between the processing sheet and the plastic material in the prior art, and to provide a secondary molding injection molding method for in-mold decoration that can effectively improve the quality of in-mold decoration products
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[0023] The present invention will be further described below in conjunction with accompanying drawing:
[0024] The present invention adopts traditional hydroforming mold, such as figure 1 As shown, the hydraulic mold used in the present invention is also composed of a movable mold 1 and a fixed mold 4. There is a concave part 7 at the center of the side where the movable mold 1 contacts with the fixed mold 4, and the fixed mold 4 is in contact with the movable mold 1. One side is provided with a convex portion 9 matching the above-mentioned concave portion 7 . In order to implement the present invention effectively, the movable mold 1 is provided with a pressure plate 3 whose tension can be adjusted. figure 2 Shown is a schematic structural diagram of the movable mold 1 and the pressing plate 3, image 3 Shown is a cross-sectional view of the structure A-A of the movable mold 1 and the pressing plate 3. see figure 2 , image 3 It can be seen that the pressing plate 3 i...
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The invention discloses a secondary mould pressing in-mould decorating injection forming method, belonging to the technical field of in-mould decoration. The method comprises the following steps of: preparing processing sheets and separating a fixed mould from a moving mould; placing the processing sheets between the moving mould and the fixed mould by using a manipulator; primarily locking mould: tightening and tightly attaching the processing sheets to a protruded part of the fixed mould by using an upper pressure plate of the moving mould to press four sides of the processing sheets; secondarily locking mould: further closing the moving mould and the fixed mould, compressing plastic materials in the die to generate extra flow and ensuring that the plastic materials can be filled into sharp parts and fine vacancy to tightly attach the processing sheets to the plastic materials; and keeping pressure, cooling and forming in a certain time. By adopting secondary mould pressing forming,the processing sheets can be fully attached to the plastic materials and the sheets have high finished product rate and favorable quality.
Description
Technical field: [0001] The invention belongs to the technical field of in-mold decoration injection molding, in particular to a secondary molding method for injection molding of in-mold decoration. Background technique: [0002] In-mold decoration technology (English name In-Mold Decoration, referred to as IMD) is to put the pre-made processed sheet into the injection mold, and then inject the plastic material into the mold to integrate the plastic material and the processed sheet into one. craft. In-mold decoration technology is currently a popular plastic surface decoration technology in the world. It is a technology that combines screen printing, molding and injection molding. It is printed on the surface of the film, high-pressure formed, punched, and finally combined with plastic. Molding is the best new process to replace spray painting and electroplating of plastic products. It reduces the follow-up processing procedures of injection molding. It can be popularized i...
Claims
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IPC IPC(8): B29C45/14B29C45/56B29C45/76B29C45/80B29C45/77
Inventor 刘纪明
Owner 东莞亿东机器有限公司