Forming die of plastic assembly part of automobile cigarette lighter
A technology for automobile cigarette lighters and forming molds, applied in the coating and other directions, can solve the problems of easy generation of flash, increase the difficulty of assembling finished products, and skew through holes, and achieve the effect of reducing the possibility of skewing through holes.
Inactive Publication Date: 2013-05-22
SUZHOU INDAL PARK XIELI PLASTIC
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Problems solved by technology
However, such an idealized insert structure design has inherent disadvantages. First, the through hole will be skewed under the action of injection molding stress; finished product quality
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[0014] Such as Figure 4 and Figure 5 Shown is the improved structure of the present invention aimed at the disadvantages of the traditional injection mold of the plastic part during the injection molding process. in Figure 4 With figure 2 The corresponding improved structure schematic diagram, Figure 5 yes Figure 4 The enlarged schematic diagram of part B' in the middle.
[0015] It can be seen from the diagram that the set of injection molds designed by the present invention and its inserts are very similar to traditional injection molds, and the same inserts include the first insert 21b located at the front mold 11 and the inserts located at the rear. The second insert 22b of the mold 12. Such as Figure 5 It can be clearly seen that the difference from before is that the first insert 21 b has an extension section passing through the through hole 31 , and the extension section is positioned and combined with the second insert outside the through hole. After one...
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The invention discloses a forming die of a plastic assembly part of an automobile cigarette lighter. The forming die comprises a front die and a rear die which are switched between a closed state and an opened state, wherein the front die and the rear die are encircled to form a containing cavity matched with the plastic assembly part of the automobile cigarette lighter corresponding to a throughhole in the plastic assembly part of the automobile cigarette lighter; a first insert is arranged on the front die; and a second insert is arranged on the rear die. The forming die is characterized in that the first insert passes through the through hole and is provided with an extension section; and the extension section and the second insert are located and combined outside the through hole. Compared with the prior art, because the forming die disclosed by the invention, in particular to an insert structure, is used, the flash resulted from incomplete closing of the front die, the rear die and the inserts can be effectively avoided; and furthermore, because the first insert is inserted into the second insert to complete the location, the deflective possibility of the through hole in theinjection moulding and forming process can also be reduced.
Description
technical field [0001] The invention relates to an improvement of an injection mold, in particular to an insert structure for improving the quality of through-hole molding in the injection mold. Background technique [0002] The plastic assembly of car cigarette lighter (hereinafter referred to as plastic part) is a core component used to manufacture car cigarette lighter. Its volume and assembly require the plastic part to have high dimensional accuracy and molding interface. Most of the plastic parts are made by injection molding process, and the injection mold must be used for injection molding, which includes a front mold and a rear mold that switch between closed and open states within a process cycle. The front mold and the rear mold are surrounded to form Match the cavity of plastic parts. After the two front molds and the rear mold are closed, the cavity is injection-molded. However, in addition to the main body shape of the plastic part, it also has many small str...
Claims
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IPC IPC(8): B29C45/14B29C45/26
Inventor 刘亚良
Owner SUZHOU INDAL PARK XIELI PLASTIC