Automobile instrument panel body and whole structure injection mold and demolding method for co-driver airbag part

Abstract

The application discloses a kind of automobile instrument panel body and whole structure injection mould and demoulding method of co-driver airbag part.It includes front mould and back mould, front mould ejector block mechanism and back mould inclined ejector mechanism arranged between front mould and back mould, the front mould ejector block mechanism includes the row position seat arranged between front mould and back mould, row position pull hook, back mould pull hook, nitrogen gas spring, the row position pull hook is fixed in row position seat bottom, the back mould pull hook is connected with row position pull hook, the lower end of nitrogen gas spring is fixed in row position seat, the upper end of nitrogen gas spring is connected with front mould contact;The back mould inclined ejector mechanism includes slide base, ejector pin plate, inclined ejector rod and inclined ejector, the bottom end of slide base is fixed with ejector pin plate, the upper end of slide base is slidably connected with inclined ejector rod, the bottom end of inclined ejector rod passes through slide base and is fixed, and the inclined ejector is fixed with the top end of inclined ejector rod.The application guarantees that automobile interior automobile instrument panel body and co-driver airbag part are combined to form whole structure normal demoulding, and stability is good.

Description

Technical Field

[0001] This invention belongs to the field of injection mold technology, specifically relating to the injection mold and demolding method for the integrated structure of an automotive dashboard body and a passenger-side airbag. Background Technology

[0002] Injection molds are tools used to produce plastic products, and they also give plastic products a complete structure and precise dimensions. Injection molding is a processing method used to mass-produce certain complex-shaped parts. Specifically, it refers to injecting heated and molten plastic into the mold cavity under high pressure by an injection molding machine, and then obtaining the molded product after cooling and solidification.

[0003] Currently, in automotive interior design, customers often combine the dashboard and passenger airbag components into a single structure to reduce injection mold development costs. After this integration, the cavity and core are interlocked, making conventional methods of mold release impossible. Therefore, designing a unique mold and release method is essential. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the aforementioned background technology and provide an injection mold and demolding method for an integral structure of an automotive dashboard body and a passenger-side airbag area. This reduces development costs and improves production efficiency.

[0005] The technical solution adopted in this invention is: an injection mold for an integral structure of an automotive dashboard body and a passenger-side airbag, including a front mold and a rear mold, a front mold spring block mechanism and a rear mold inclined ejector mechanism disposed between the front mold and the rear mold, the front mold spring block mechanism including a sliding seat disposed between the front mold and the rear mold, a sliding hook, a rear mold hook, and a nitrogen spring, the sliding hook being fixed to the bottom of the sliding seat, the rear mold hook being engaged with the sliding hook, the lower end of the nitrogen spring being fixed inside the sliding seat, and the upper end of the nitrogen spring being in contact with the front mold; the rear mold inclined ejector mechanism includes a slide block, The system comprises an ejector plate, an angled ejector rod, and an angled ejector. The bottom end of the slide block is fixed to the ejector plate, and the upper end of the slide block is slidably connected to the angled ejector rod. The bottom end of the angled ejector rod passes through the slide block and is fixed. The angled ejector is fixed to the top end of the angled ejector rod. The back of the angled ejector is provided with a first spring-loaded mechanism and a second spring-loaded mechanism, a spring, and an anti-sticking mold spring block. The first spring-loaded mechanism and the second spring-loaded mechanism are arranged at intervals. The spring is located between the first spring-loaded mechanism and the second spring-loaded mechanism and is fixed inside the angled ejector. The anti-sticking mold spring block is located on the front of the angled ejector and is connected to the spring. The front of the anti-sticking mold spring block is in contact with the undercut structure of the cavity.

[0006] In a further preferred configuration, the slide seat is provided with a guide groove, and the front mold is provided with a first slide rail that cooperates with the guide groove.

[0007] In a further preferred configuration, the lower end of the nitrogen spring is fixed to the position seat by a nitrogen spring fixing screw.

[0008] In a further preferred configuration, the upper edge of the rear mold is provided with a clearance groove, and the sliding hook and the rear mold hook are located within the clearance groove.

[0009] In a further preferred configuration, an insert that contacts the bottom surface of the slide seat is installed in the clearance groove, and the insert is fixed to the rear mold by bolts.

[0010] In a further preferred configuration, the upper end face of the slide block is provided with a second slide rail, and the bottom end of the inclined push rod is provided with a slider that is slidably connected to the second slide rail.

[0011] In a further preferred configuration, the rear mold corresponding to the inclined top is provided with a T-shaped guide rail, and the first pressure bar mechanism and the second pressure bar mechanism are inserted into the T-shaped guide rail of the rear mold to form a slide rail structure together with the T-shaped guide rail.

[0012] In a further preferred configuration, the T-shaped guide rail is fixed to the rear mold side by a first guide rail screw, a second guide rail screw, and a third guide rail screw; the first pressure strip mechanism and the second pressure strip mechanism are fixed to the back of the inclined top by pressure strip screws.

[0013] In a further preferred configuration, the angle range of the inclined push rod is 9°; and the angle range of the slide block is 22°.

[0014] A method for ejecting an injection mold for an integral structure of an automotive dashboard body and a passenger-side airbag includes the following steps: A rear mold hook pulls onto a sliding seat, causing the guide groove of the sliding seat to move along the first slide rail on the front mold until the rear mold hook and the sliding hook are misaligned. The sliding seat continues to move until the nitrogen spring between the front mold and the sliding seat is fully released, causing the sliding seat to completely disengage. An ejector plate pushes upward, driving the slide, the angled ejector rod, and the angled ejector to move upward. Simultaneously, the angled ejector rod moves laterally and downward within the second slide rail of the slide via a slider. Guided by the angled ejector rod, the angled ejector moves upward, compressing the spring through the first and second spring pin mechanisms on the back side. This compresses the spring, causing the anti-sticking mold block to output ejection force to the cavity undercut structure, moving synchronously with the angled ejector to further press against the cavity undercut structure until the angled ejector is completely ejected and disengaged from the cavity undercut structure. During ejection, the angled ejector moves upward, and through the slide rail structure formed by the first and second pressure bar mechanisms and the T-shaped guide rail, the angled ejector is stably and completely ejected.

[0015] This invention effectively solves problems such as difficult demolding, product sticking to the mold, and excessively high mold temperature. It ensures that the automotive interior dashboard body and the passenger airbag part are properly demolded to form an integrated structure, optimizes product quality, enhances mold life, improves production efficiency, has good stability, and greatly reduces costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention;

[0017] Figure 2 This is a top view of the present invention;

[0018] Figure 3 for Figure 2 Cross-sectional view at point DD;

[0019] Figure 4 for Figure 2 Cross-sectional view at CC;

[0020] Figure 5 for Figure 2 Cross-sectional view at the EE section;

[0021] Figure 6 for Figure 2 Cross-sectional view at point AA;

[0022] Figure 7 for Figure 2 Cross-sectional view at point BB;

[0023] Figure 8 This is a schematic diagram of the slide block structure;

[0024] Figure 9 This is a schematic diagram of the rear mold undercutting out of the mold in an embodiment of the present invention;

[0025] Figure 10 This is a schematic diagram illustrating the adjustment of the angle of the inclined rod and the angle of the slide block in an embodiment of the present invention.

[0026] In the diagram, 1-front mold; 101-first slide rail; 2-rear mold; 201-rear mold hook; 202-T-shaped guide rail; 203a-first guide rail screw, 203b-second guide rail screw, 203c-third guide rail screw; 204-clearance groove; 205-insert; 206-bolt; 3-cavity undercut structure; 4-slide seat; 401-guide groove; 402-slide hook; 403-nitrogen spring; 404-nitrogen spring fixing screw; 5-slanted ejector; 501a-first spring pin mechanism, 501b-second spring pin mechanism; 502-spring; 503-anti-stick mold spring block; 504a-first pressure bar mechanism, 504b-second pressure bar mechanism; 505-pressure bar screw; 6-slanted ejector rod; 601-slider; 7-slide seat; 701-second slide rail; 8-ejector plate. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments to facilitate a clear understanding of the present invention, but these descriptions do not constitute a limitation on the present invention.

[0028] Reference Figures 1-5As shown, the present invention includes a front mold 1, a rear mold 2, and a front mold spring block mechanism and a rear mold inclined ejector mechanism disposed between the front mold 1 and the rear mold 2. The front mold spring block mechanism includes a sliding seat 4, a sliding hook 402, a rear mold hook 201, and a nitrogen spring 403 disposed between the front mold 1 and the rear mold 2. The sliding hook 402 is fixed to the bottom of the sliding seat 4, and the rear mold hook 201 is connected to the sliding hook 402. The lower end of the nitrogen spring 403 is fixed in the sliding seat 4 by a nitrogen spring fixing screw 404, and the upper end of the nitrogen spring 403 is in contact with the front mold 1. The sliding seat 4 is provided with a guide groove 401, and the front mold 1 is provided with a first slide rail 101 that cooperates with the guide groove 401. During operation, the rear mold hook 201 pulls the slide seat 4, causing the guide groove 401 of the slide seat 4 to move along the direction of the first slide rail 101 on the front mold 1 until the rear mold hook 201 and the slide hook 402 are misaligned. The slide seat 4 continues to move until the nitrogen spring 403 between the front mold 1 and the slide seat 4 is fully released, causing the slide seat 4 to completely disengage. The upper edge of the rear mold 2 is provided with a clearance groove 204. The slide hook 402 and the rear mold hook 201 are located in the clearance groove 204. An insert 205 that contacts the bottom surface of the slide seat 4 is installed in the clearance groove 204. The insert 205 is fixed to the rear mold 2 by bolts 206.

[0029] Reference Figures 6-8 As shown, the slide 7 adopts a double-angle ejection mechanism, and the bottom end of the slide 7 is fixed to the ejector plate 8. (Refer to...) Figure 9 As shown, the upper surface of the slide block 7 is provided with a second slide rail 701, and the bottom end of the inclined ejector rod 6 is provided with a slider 601 that is slidably connected to the second slide rail 701. The bottom end of the inclined ejector rod 6 passes through the slide block 7 and is fixed by a nut. The inclined ejector 5 is fixed to the top end of the inclined ejector rod 6. The back of the inclined ejector 5 is provided with a first spring needle mechanism 501a and a second spring needle mechanism 501b, a spring 502, and an anti-sticking mold spring block 503. The first spring needle mechanism 501a and the second spring needle mechanism 501b are arranged at intervals. The spring 502 is located between the first spring needle mechanism 501a and the second spring needle mechanism 501b and is fixed inside the inclined ejector 5. The anti-sticking mold spring block 503 is located on the front of the inclined ejector 5 and is connected to the spring 502. The front of the anti-sticking mold spring block 503 contacts the cavity undercut structure 3. The ejector plate 8 faces upward. The ejector pushes out, causing the slide block 7, the angled ejector rod 6, and the angled ejector 5 to move upwards. Simultaneously, the angled ejector rod 6 moves laterally and downwards within the second slide rail 701 of the slide block 7 via the slider 601. Guided by the angled ejector rod 6, the angled ejector 5 moves upwards. Through the first spring pin mechanism 501a and the second spring pin mechanism 501b on the back side, the spring 502 is compressed, causing the anti-sticking mold spring block 503 to output ejection force to the cavity undercut structure 3. It moves synchronously with the angled ejector 5, further pressing against the cavity undercut structure 3 until the angled ejector 5 is completely ejected and disengaged from the cavity undercut structure 3. This mechanism solves the problem of the undercut structure sticking to the mold.

[0030] The rear mold 2 corresponding to the inclined ejector 5 is equipped with a T-shaped guide rail 202. The T-shaped guide rail 202 is fixed to the side of the rear mold 2 by a first guide rail screw 203a, a second guide rail screw 203b, and a third guide rail screw 203c. The first pressure bar mechanism 504a and the second pressure bar mechanism 504b are fixed to the back of the inclined ejector 5 by pressure bar screws 505. The first pressure bar mechanism 504a and the second pressure bar mechanism 504b are inserted into the T-shaped guide rail 202 of the rear mold 2 and together with the T-shaped guide rail 202, they form a slide rail structure. When the inclined ejector 5 is ejected, the inclined ejector 5 moves upward, and through the slide rail structure, the inclined ejector 5 is stably and completely ejected. This mechanism solves the problem of uneven movement of the inclined ejector 5.

[0031] In this embodiment, refer to Figure 10 As shown, the ejection space of the inclined ejector 5 is very narrow, with a space distance of only 22.5mm. By adjusting the movement angle of the inclined ejector rod 6 by 9° and the movement angle of the slide block 7 by -22° (the angle with the horizontal direction), the inclined ejector 5 moves backward while ejecting upward, forming a double-angle movement, thereby reducing the ejection space and enabling the inclined ejector 5 to exit the mold normally.

[0032] Because the sloping top 5 is quite large, the ribs in the airbag frame area are too deep and too dense. Using conventional steel would not provide effective cooling, increasing the production cycle. To improve the cooling effect in this area, beryllium copper was used for the main structure, and water channels were incorporated.

[0033] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

Claims

1. An injection mold for an integral structure of an automotive dashboard body and a passenger-side airbag, comprising a front mold (1) and a rear mold (2), characterized in that: It also includes a front mold spring block mechanism and a rear mold inclined ejector mechanism disposed between the front mold (1) and the rear mold (2). The front mold spring block mechanism includes a slide seat (4) disposed between the front mold (1) and the rear mold (2), a slide hook (402), a rear mold hook (201), and a nitrogen spring (403). The slide hook (402) is fixed to the bottom of the slide seat (4), and the rear mold hook (201) is engaged with the slide hook (402). The lower end of the nitrogen spring (403) is fixed inside the slide seat (4). The upper end of the sliding block (7) is in contact with the front mold (1); the rear mold inclined ejector mechanism includes a slide block (7), an ejector plate (8), an inclined ejector rod (6), and an inclined ejector (5). The bottom end of the slide block (7) is fixed to the ejector plate (8), the upper end of the slide block (7) is slidably connected to the inclined ejector rod (6), the bottom end of the inclined ejector rod (6) passes through the slide block (7) and is fixed. The inclined ejector (5) is fixed to the top end of the inclined ejector rod (6). The back of the inclined ejector (5) is provided with a first spring needle mechanism (501a) and a second spring needle mechanism (501b), a spring (502), and an anti-stick mold. The spring block (503), the first spring pin mechanism (501a) and the second spring pin mechanism (501b) are arranged at intervals, the spring (502) is located between the first spring pin mechanism (501a) and the second spring pin mechanism (501b) and is fixed in the inclined top (5), the anti-sticking spring block (503) is provided on the front of the inclined top (5) and is connected to the spring (502), the front of the anti-sticking spring block (503) is in contact with the cavity undercut structure (3); the sliding seat (4) is provided with a guide groove (401), and the front mold (1) is provided with a guide groove (401). A first slide rail (101) is provided to cooperate with a guide groove (401); the guide groove (401) of the slide seat (4) moves along the direction of the first slide rail (101) on the front mold (1) until the rear mold hook (201) and the slide hook (402) are misaligned; the upper end face of the slide seat (7) is provided with a second slide rail (701), and the bottom end of the inclined push rod (6) is provided with a slider (601) which is slidably connected to the second slide rail (701); the inclined push rod (6) moves to the side and downward in the second slide rail (701) of the slide seat (7) through the slider (601).

2. The injection mold for the integral structure of the automotive dashboard body and the passenger-side airbag area according to claim 1, characterized in that: The row seat (4) is provided with a guide groove (401), and the front mold (1) is provided with a first slide rail (101) that cooperates with the guide groove (401).

3. The injection mold for the integral structure of the automotive dashboard body and the passenger-side airbag area according to claim 1, characterized in that: The lower end of the nitrogen spring (403) is fixed inside the row seat (4) by a nitrogen spring fixing screw (404).

4. The injection mold for the integral structure of the automotive dashboard body and the passenger-side airbag area according to claim 1, characterized in that: The upper edge of the rear mold (2) is provided with a clearance groove (204), and the sliding hook (402) and the rear mold hook (201) are located in the clearance groove (204).

5. The injection mold for the integral structure of the automotive dashboard body and the passenger-side airbag area according to claim 4, characterized in that: An insert (205) that contacts the bottom surface of the slide seat (4) is installed in the clearance groove (204), and the insert (205) is fixed to the rear mold (2) by bolts (206).

6. The injection mold for the integral structure of the automotive dashboard body and the passenger-side airbag area according to claim 1, characterized in that: The upper end of the slide block (7) is provided with a second slide rail (701), and the bottom end of the inclined rod (6) is provided with a slider (601) which is slidably connected to the second slide rail (701).

7. The injection mold for the integral structure of the automotive dashboard body and the passenger-side airbag area according to claim 1, characterized in that: The rear mold (2) corresponding to the inclined top (5) is provided with a T-shaped guide rail (202). The first pressure bar mechanism (504a) and the second pressure bar mechanism (504b) are inserted into the T-shaped guide rail (202) of the rear mold (2) and together with the T-shaped guide rail (202) form a slide rail structure.

8. The injection mold for the integral structure of the automotive dashboard body and the passenger-side airbag area according to claim 7, characterized in that: The T-shaped guide rail (202) is fixed to the rear mold (2) side by the first guide rail screw (203a), the second guide rail screw (203b), and the third guide rail screw (203c); the first pressure strip mechanism (504a) and the second pressure strip mechanism (504b) are fixed to the back of the inclined top (5) by the pressure strip screw (505).

9. The injection mold for the integral structure of the automotive dashboard body and the passenger-side airbag area according to claim 1, characterized in that: The angle range of the inclined rod (6) is 9°; the angle range of the slide (7) is 22°.

10. The molding method for the injection mold of the integral structure of the automobile dashboard body and the passenger-side airbag as described in claim 1, characterized in that: Includes the following steps: The rear mold hook (201) pulls the slide seat (4), causing the guide groove (401) of the slide seat (4) to move along the first slide rail (101) on the front mold (1) until the rear mold hook (201) and the slide hook (402) are misaligned. The slide seat (4) continues to move until the nitrogen spring (403) between the front mold (1) and the slide seat (4) is fully released, causing the slide seat (4) to completely disengage. The ejector plate (8) pushes upward, driving the slide seat (7), the inclined ejector rod (6), and the inclined ejector (5) to move upward. At the same time, the inclined ejector rod (6) moves to the side and downward in the second slide rail (701) of the slide seat (7) through the slider (601), and moves through the inclined ejector rod. (6) Guide, the inclined ejector (5) moves upward, and through the first spring needle mechanism (501a) and the second spring needle mechanism (501b) on the back, the spring (502) is compressed, which drives the anti-sticking mold block (503) to output ejection force to the cavity undercut structure (3), and moves synchronously with the inclined ejector (5), further pressing against the cavity undercut structure (3) until the inclined ejector (5) is completely ejected and disengaged from the cavity undercut structure (3); when the inclined ejector (5) is ejected, the inclined ejector (5) moves upward, and through the slide rail structure formed by the first pressure bar mechanism (504a) and the second pressure bar mechanism (504b) and the T-shaped guide rail (202), the inclined ejector (5) is stably and completely ejected.

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