Foam mold for forming soft instrument panel with air bag frame

Abstract

The invention provides a foaming mold for forming a soft instrument board with an air bag frame, wherein the air bag frame comprises an air bag door the back of which is provided with a weakening groove, wherein the foaming mold comprises a core pulling mechanism; the core pulling mechanism comprises a base, a plurality of matching blocks, a plurality of adjusting sheets and supporting bars, wherein the plurality of matching blocks are arranged on the surface of the base so as to be fit with the back of the air bag door; the plurality of adjusting sheets are respectively positioned between the matching blocks and the base; the supporting bars are arranged among at least part of the matching blocks corresponding to the weakening groove. According to the invention, the matching between the core pulling mechanism and the back of the air bag door is optimized through the plurality of matching blocks arranged on the surface of the base as well as the adjusting sheets arranged between the matching blocks and the base, and the flatness of the surface of the instrument board is prevented from being affected because of the interference or the clearance between the core pulling mechanism and the back of the air bag door; the weakening groove is supported through the supporting bars which are arranged among at least part of the matching blocks corresponding to the weakening groove; a weakening area is prevented from protruding because of the clearance of the weakening groove; the adjustment is rapid and convenient; the attractiveness of a product visible surface is ensured.

Description

technical field [0001] The invention belongs to the field of moulds, and in particular relates to a foaming mould, which is used for forming a soft instrument panel with an airbag frame. Background technique [0002] Automotive dashboards can be divided into hard dashboards and soft dashboards according to their surface texture. Among them, the soft dashboard is a plastic dashboard with a foam layer, which is generally composed of a body skeleton, a middle foam layer, and a skin layer. . In terms of safety, dashboards can be divided into dashboards without airbags and dashboards with airbags (for the co-pilot). With the deepening of lightweight and low-cost concepts in the automotive field, the soft instrument panel 1' with a built-in airbag frame 12' (such as figure 1 ) and soft instrument panel 2' with integrated air bag frame 22' (eg figure 2 ) applied trend frequently. [0003] like figure 1 As shown, the soft instrument panel 1' is composed of a body frame 11', a ...

AI Technical Summary

Problems solved by technology

Taking the foaming mold of a soft instrument panel 1' with a built-in airbag frame 12' as an example, there are the following problems: (1) During injection molding, the airbag frame 12' itself will produce inherent deformation, especially when it is made of TPO (Polyolefin thermoplastic elastomer) or TPE (thermoplastic elastomer) material injection molding built-in airbag frame 12', its inherent deformation is relatively large, while the integral core pulling mechanism 5' (such as Figure 4 ) is usually composed of an integral matching block and a transmission mechanism such as a core-pulling cylinder. When in use, the fit between the integral matching block and the back of the airbag door 121' can only be adjusted by repairing the integral matching block. The mechanism 5' does not match well with the back of the airbag door 121', so there is interference or space avoidance. After foaming and mold opening, these interference or space avoidance parts with internal stress protrude, thus causing the visible surface of instrument panel 1' to be uneven ; (2) There is a weakening groove 123' on the back of the airbag door 121' (such as Figure 4 ), the existing core-pulling mechanism 5' is actively set up to avoid more interference and undercuts in the corresponding part of the weakening groove 123', but this makes the weakening groove 123' have no corresponding filling structure, and the foaming process In the process, the internal pressure of the foaming material causes the weakened groove to sag, and after the foaming is completed, the internal pressure is released to cause deformation and rebound, and the weakened area on the surface of the instrument panel 1' protrudes, causing the weakened mark to appear

Due to the above two main reasons, after foaming, uneven waves (such as Figure 5 shown by the dotted line in the center), affecting the aesthetics of the visible surface of the instrument panel

Images