Oblique core-pulling structure of fixed die of automobile instrument front cover forming die

Abstract

An inclined core pulling structure of a fixed die of an automobile instrument front cover forming die comprises a cavity piece and a core piece, the cavity piece is provided with a forming hole, the inner surface of the forming hole is matched with an outer ring, an insert is arranged on the cavity piece, an inclined channel is formed in the insert, the direction of the channel is parallel to the inner inclined face of the rear side of the inner ring, and the channel is communicated with the forming hole. The core piece is arranged in the channel in a sliding mode, the peripheral face of the lower portion of the core piece is matched with the inner ring, a restraining structure used for restraining the core piece to move in the channel direction is arranged between the core piece and the channel, the upper end face of the core piece is a horizontal plane, and an inverted-L-shaped first hook body and an L-shaped second hook body located on the rear side of the first hook body are arranged on the upper end face of the core piece. The vertical part of the first hook body is connected with the upper end face of the mold core piece, the transverse part of the first hook body and the transverse part of the second hook body are vertically hooked, and the vertical part of the second hook body is connected with a hot runner plate. According to the utility model, the demoulding can be realized under the conditions that the product is not strained and the demoulding direction is not changed.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile instruments, in particular to an oblique core-pulling structure of a fixed die of a molding die for a front cover of an automobile instrument. Background Art

[0002] Since the front cover of the car instrument directly faces the user, the requirements for its shape and appearance are relatively high. Figure 5 As shown, the rear portion of the inner ring 22 of the designed front cover 2 is an inner inclined surface 22a. Since the instrument assembly has many assembled parts and involves safety regulations and ergonomic requirements of the entire vehicle, the special shape of the front cover 2 must be achieved by the mold structure. However, the existing mold structure cannot achieve demolding without damaging the product and changing the demolding direction (vertical to the horizontal plane). Utility Model Content

[0003] Based on this, in order to solve the above technical problems, an oblique core-pulling structure of the fixed mold of the automobile instrument front cover forming mold is provided.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] An oblique core-pulling structure for a fixed mold of a front cover mold for an automobile instrument panel is characterized by comprising a cavity member for molding the outer ring of the front cover and a core member for molding the inner ring of the front cover, the cavity member having a molding hole, the inner surface of the molding hole being adapted to fit the outer ring, the cavity member being provided with an insert having an inclined channel, the direction of the channel being parallel to the rear inner inclined surface of the inner ring and communicating with the molding hole, the core member being slidably disposed within the channel, the outer peripheral surface of the lower portion being adapted to fit the inner ring, a restraining structure being provided between the core member and the channel for restraining the core member from moving along the channel direction, the upper end surface of the core member being horizontal, and having an inverted L-shaped first hook and an L-shaped second hook located behind the first hook, the vertical portion of the first hook being connected to the upper end surface of the core member, the transverse portion of the first hook being vertically hooked with the transverse portion of the second hook, and the vertical portion of the second hook being connected to the hot runner plate.

[0006] The utility model discloses an oblique core-pulling structure for a fixed mold of a molding die for a front cover of an automobile instrument. The fixed mold of the molding die for the front cover of an automobile instrument is improved so that the fixed mold has an oblique core-pulling function. Based on this function, when opening the mold, the core piece can be firstly pulled out obliquely to completely separate it from the inner circle area of ​​the front cover, and then conventional demoulding in the vertical and horizontal directions can be performed, thereby realizing demoulding without damaging the product and without changing the demoulding direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 This is a schematic diagram of the top view of the structure of the utility model;

[0008] Figure 2 for Figure 1 AA section view;

[0009] Figure 3 for Figure 1 BB cross-sectional view;

[0010] Figure 4 This is a schematic diagram of a molding die for a front cover of an automobile instrument panel according to the present invention;

[0011] Figure 5 This is a structural schematic diagram of the automobile instrument front cover of the present utility model. DETAILED DESCRIPTION

[0012] The following will illustrate the implementation of the present utility model in conjunction with the drawings in the specification. It should be noted that the implementation methods involved in this specification are not exhaustive and do not represent the only implementation methods of the present utility model. The following corresponding embodiments are only for the purpose of clearly illustrating the utility model content of the utility model patent and are not intended to limit its implementation methods. For ordinary technicians in this field, different forms of changes and modifications can be made on the basis of the description of this embodiment. All obvious changes or modifications that belong to the technical concept and utility model content of the present utility model are also within the scope of protection of the present utility model.

[0013] like Figure 1-3 As shown, an embodiment of the present invention provides an oblique core-pulling structure of a fixed mold of a front cover forming mold for an automobile instrument, comprising a cavity part 1100 , an insert 1200 and a core part 1300 .

[0014] The cavity part 1100 is used to form the outer ring 21 of the front cover 2 of the automobile instrument. It has a forming hole, and the inner surface of the forming hole is adapted to the outer ring 21. Figure 2 、 3 and 5.

[0015] The cavity part 1100 is made of metal, such as iron.

[0016] like Figure 2 and Figure 3 As shown, the insert 1200 is disposed on the cavity part 1100 , and its upper surface is a plane.

[0017] The insert 1200 has an inclined channel, the direction of which is parallel to the rear inner inclined surface 22 a of the inner ring 22 of the front cover 2 to be formed, and communicates with the forming hole of the cavity part 1100 .

[0018] Exemplarily, the above-mentioned channel has an inclination angle of 22° (68° to the horizontal plane).

[0019] The core piece 1300 is used to form the inner ring 22. It is slidably arranged in the channel, and the outer peripheral surface of the lower part is adapted to the inner ring 22. Figure 2 、 3 and 5.

[0020] Among them, a constraint structure is provided between the core piece 1300 and the channel for constraining the core piece 1300 to move along the channel direction, such as Figure 1 As shown, the constraint structure includes three guide blocks 1310 and three sliding grooves corresponding to the three guide blocks. The cross sections of the guide blocks 1310 and the sliding grooves are both T-shaped.

[0021] The guide blocks 1310 are connected to the core piece 1300 by screws. Two guide blocks 1310 are symmetrically arranged on the left and right sides of the core piece 1300 , and the remaining guide block 1310 is arranged on the front side of the core piece 1300 .

[0022] The chute is formed on the wall of the channel.

[0023] The guide block 1310 is constrained in a corresponding slide groove, and the direction of the slide groove is the same as the direction of the channel, so that the core piece 1300 can move obliquely along the direction of the channel when subjected to an external force in the vertical direction.

[0024] like Figure 1 As shown, the upper end surface of the core piece 1300 is a horizontal plane, on which is provided an inverted L-shaped first hook body 1321 and an L-shaped second hook body 1322 located at the rear side of the first hook body 1321. The vertical portion of the first hook body 1321 is connected to the upper end surface of the core piece 1300 by bolts, and the transverse portion is hooked with the transverse portion of the second hook body 1322 up and down, and the vertical portion of the second hook body 1322 is connected to the hot runner plate 3 by bolts.

[0025] A plurality of wear-resistant blocks 31 are fixed to the area on the lower surface of the hot runner plate 3 corresponding to the upper end surface of the cavity part 1300 by bolts. The plurality of wear-resistant blocks 31 are arranged in sequence and spaced apart in the left-right direction. The hardness of the wear-resistant blocks 31 is relatively high (HRC48-52).

[0026] The mold opening process after the injection molding of the automobile instrument front cover mold is completed is as follows:

[0027] like Figure 4As shown, first, under the action of the mold opening stroke controller 4, the mold realizes a parting action (the fixed mold 1 and the hot runner plate 3 are opened). At this time, the hot runner plate 3 moves vertically upward, and drives the core piece 1300 through the first hook 1321 and the second hook 1322. At the same time, under the action of the above-mentioned constraint structure, the core piece 1300 moves obliquely along the direction of the channel. In this process, the core piece 1300 produces a horizontal displacement (front side). Since the first hook 1321 and the second hook 1322 are only hooked up and down, the first hook 1321 can follow the trend from Figure 2 and Figure 3 The first position shown moves forward to the second position (without separating from the second hook 1322 ), and the multiple wear-resistant blocks 31 on the lower surface of the hot runner plate 3 can prevent the core piece 1300 from scratching the hot runner plate 3 (generally made of mild steel).

[0028] The core piece 1300 slides upward along the inclined channel on the insert 1200 to realize a core pulling action at an angle of 22°. When the core piece 1300 is completely separated from the inner ring area of ​​the front cover 2, the stroke of the mold opening stroke controller 4 ends, and the mold realizes a secondary parting action (the movable mold 5 and the fixed mold 1 are opened) under the action of the mold opening force of the injection molding machine. At this point, the oblique core pulling action of the mold is completed, and the subsequent conventional demolding actions such as ejection and removal are not described in detail here.

[0029] In the above process, the oblique core pulling action is performed first, and after the core piece 1300 is completely separated from the inner circle area of ​​the front cover 2, conventional demoulding in the vertical and horizontal directions is performed. The demoulding direction is not changed, and it is ensured that the product is not damaged.

[0030] The mold closing process is as follows:

[0031] First, under the action of the mold closing stroke controller 6, the mold first closes the primary parting surface when the mold is opened (the fixed mold 1 and the hot runner plate 3 are closed), and the core part 1300 will be reset obliquely. The specific process is the reverse process of the mold opening process, and the details will not be repeated. During this process, the first hook body 1321 can move from the second position to the rear side and return to the first position.

[0032] Continue to close the mold to reset the mold closing stroke controller 6 structure, close the secondary parting surface when opening the mold (the movable mold 5 and the fixed mold 1 are closed), and complete the mold closing action.

[0033] In this way, a molding cycle is realized based on the core-pulling structure, and the product can be produced smoothly.

[0034] From the above, it can be seen that the embodiment of the utility model provides an oblique core pulling structure of the fixed mold of the automobile instrument front cover molding mold, which improves the fixed mold of the automobile instrument front cover molding mold so that it has an oblique core pulling function. Based on this function, when opening the mold, the core piece can be first pulled out obliquely to completely separate it from the inner circle area of ​​the front cover, and then conventional demolding in the vertical and horizontal directions can be performed, thereby achieving demolding without damaging the product and changing the demolding direction.

[0035] Obviously, those skilled in the art should realize that the above embodiments are only used to illustrate the present invention and are not used to limit the present invention. As long as they are within the spirit of the present invention, any changes or modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. An oblique core-pulling structure for a fixed die of a front cover forming die for an automobile instrument panel, characterized in that: The invention also provides a method for the molding of the mold core, wherein the mold core comprises a mold cavity part for molding the outer ring of the front cover and a mold core part for molding the inner ring of the front cover, the mold cavity part has a molding hole, the inner surface of the molding hole is adapted to the outer ring, the mold cavity part is provided with an insert, the insert has an inclined channel, the direction of the channel is parallel to the inner inclined surface of the rear side of the inner ring, and is connected to the molding hole, the core part is slidably arranged in the channel, the outer peripheral surface of the lower part is adapted to the inner ring, a constraint structure for constraining the core part to move along the channel direction is provided between the core part and the channel, the upper end surface of the core part is a horizontal plane, and is provided with an inverted L-shaped first hook body and an L-shaped second hook body located at the rear side of the first hook body, the vertical portion of the first hook body is connected to the upper end surface of the core part, the transverse portion and the transverse portion of the second hook body are hooked up and down, and the vertical portion of the second hook body is connected to the hot runner plate.

2. The oblique core-pulling structure of the fixed mold of the automobile instrument front cover forming mold according to claim 1 is characterized in that: The constraint structure includes a plurality of guide blocks connected around the core member and a plurality of slide grooves formed on the wall of the channel. The cross-sections of the guide blocks and the slide grooves are both T-shaped. The plurality of guide blocks are constrained one by one in the plurality of slide grooves, and the direction of the slide grooves is the same as that of the channel.

3. The oblique core-pulling structure of the fixed mold of the automobile instrument front cover forming mold according to claim 2, characterized in that: There are three guide blocks, two of which are symmetrically arranged on the left and right circumferences of the core piece, and the remaining guide block is arranged on the front circumference of the core piece.

4. The oblique core-pulling structure of the fixed mold of the automobile instrument front cover forming mold according to claim 2, characterized in that: The guide block is connected to the core piece through screws.

5. The oblique core-pulling structure of the fixed mold of the automobile instrument front cover forming mold according to claim 1, characterized in that: A plurality of wear-resistant blocks are provided in the area of ​​the lower surface of the hot runner plate corresponding to the upper end surface of the cavity part.

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