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A stretching method and its mold for adjusting the injection molding film in a mold by controlling the timing of glue feeding

A technology of timing adjustment and in-mold injection molding, which is applied in the field of in-mold injection molding, can solve problems such as creases in the in-mold injection molding process, and achieve a practical structural effect

Active Publication Date: 2016-08-10
昆山峰实电子外观应用科技有限公司
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to overcome the problem of creases in the existing in-mold injection molding process, especially the local narrow-edge mouth structure, the present invention provides a stretching method and a mold for controlling the timing sequence of glue feeding and adjusting the in-mold injection molding film.

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  • A stretching method and its mold for adjusting the injection molding film in a mold by controlling the timing of glue feeding
  • A stretching method and its mold for adjusting the injection molding film in a mold by controlling the timing of glue feeding

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0020] figure 1 It is a schematic diagram of the product implemented according to this plan. It is equipped with the main glue point 1 and the narrow side 2 structure of the workpiece; Crease; Narrow side 2 corresponds to the secondary glue point 5 set for adjusting the position of the joint line.

[0021] figure 2 It is a schematic diagram of the mold structure design, including secondary glue point 5 (smaller than the main glue point), main glue point 6, secondary glue point hot runner valve needle 7, main glue point hot runner valve needle 8, air pressure inlet and outlet pipes (3,4).

[0022] The specific steps of controlling the timing of glue feeding to adjust the stretching method of the in-mold injection molding film are as follows:

[0023] 1) Connect the timing controller with the injection signal of the injection machine to conf...

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Abstract

The invention belongs to the field of intra-mould injection molding and particularly relates to an extension method for controlling an adhesive filling time sequence to adjust an intra-mould injection molding thin film and a mould for the method. Hot runner valve needle type multi-point (two-point) adhesive filling is adopted; a timing signal and an injection signal of a time sequence controller are connected and are respectively connected with each runner valve needle, so as to adjust adhesive filling time of a plurality of points to find the best thin film extension process to finally solve a crease line problem of the thin film, caused by extension; the method can solve the crease line problem of the thin film, caused by extension, through adjusting delaying and filling time of adhesive filling; the trouble of discontinuously adjusting parameters in a process of changing the size of an adhesive filling point through redesigning is avoided; and the structure is practical and is particularly suitable for large-piece or narrow-edge intra-mould injection molding products.

Description

technical field [0001] The invention belongs to the field of in-mold injection molding, and in particular relates to a stretching method and a mold for controlling the timing sequence of glue feeding and adjusting an in-mold injection molding film, so as to solve the common crease problem in the in-mold injection molding process. Background technique [0002] At present, in the known in-mold injection molding process, due to the rapid flow of the material flow, the film is stretched in the cavity of the injection mold, especially when multi-point glue is injected or the material flow in two directions is combined, the stretched film will eventually form a fold. Usually, it needs to be solved in the following aspects in the early stage: (1) Adjust the scaling ratio of the film and cavity size; (2) Change the position of the joint line by adjusting the molding parameters; (3) Adjust the flow channel Dimensional control of material flow to improve creases; this will lead to a l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C45/76B29C45/26B29C45/30
Inventor 方幼玲
Owner 昆山峰实电子外观应用科技有限公司
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