Lateral buckle demolding method for automobile auxiliary instrument rear storage box mold

Abstract

The invention belongs to the technical field of injection molds, and particularly relates to an automobile auxiliary instrument rear storage box mold lateral buckle demolding method, a used mold comprises a cavity frame and a core plate, a cavity insert is arranged in the cavity frame, a core insert and a side wall forming insert are arranged on the core plate, and a core pulling sliding block is arranged on the side wall forming insert in a sliding mode. A core pulling guide block is arranged on the core pulling sliding block and penetrates through the side wall forming insert, a demolding panel and a buckle insert are arranged in the side wall forming insert in a sliding mode, during demolding, the mold core plate and the mold cavity frame are subjected to mold opening, in the mold opening process, the side pulling mechanism drives the core pulling sliding block to slide outwards on the side wall forming insert, and the core pulling sliding block drives the core pulling guide block to slide outwards; and under the action of the inclined sliding guide mechanism, the demolding panel and the buckle insert are driven to slide upwards and outwards, so that the buckle insert is separated from the lateral buckle, and then the outer sliding oil cylinder drives the side wall forming insert and the core-pulling sliding block to slide outwards together, so that the side wall forming insert and the side wall of the product are demolded.

Description

Technical Field

[0001] This invention belongs to the field of injection mold technology, specifically relating to a side-clamping demolding method for a mold of a rear storage box for automotive auxiliary instruments. Background Technology

[0002] In the production of automotive instrument cluster rear storage boxes, injection molding is generally used for integral molding. The assembly structure of these boxes varies depending on the vehicle model. This application specifically relates to an automotive instrument cluster rear storage box with a side-clamping mechanism. The side-clamping mechanism facilitates the assembly of the rear storage box with the vehicle body, ensuring a secure and reliable connection. Based on product structure and shape analysis, existing technologies use an internal ejector plate ejection structure for the side-clamping mechanism in mold design. This involves a secondary ejection structure on the ejector plate of the mold. The oblique sliding ejection action of the secondary ejection structure causes the clip on the secondary ejector pin to disengage from the side-clamping mechanism. However, this design has several drawbacks: 1. The secondary ejection structure can easily interfere with the mold's cooling water channel layout, affecting product molding quality; 2. In actual production, the stability of the secondary ejector pin in the secondary ejection structure is poor. After a period of production (approximately six months), bending deformation or even breakage may occur, requiring frequent downtime for maintenance and replacement, severely impacting production efficiency. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a method for lateral snap-on demolding of automotive auxiliary instrument panel rear storage box molds. This method uses a combined slider for lateral translation and guides the snap-on inserts to slide vertically for demolding. The action is stable, the guidance is precise, it does not interfere with the cooling water circuit layout, and the product molding quality is good.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A method for demolding a rear storage box mold for an automotive instrument cluster using lateral snap-fit ​​fasteners. The mold includes a cavity frame and a core plate. Cavity inserts are provided in the cavity frame, and core inserts are provided on the core plate. Sidewall forming inserts are slidably mounted on the four sides of the core inserts, forming a cavity for filling the rear storage box. Lateral snap-fit ​​fasteners are formed on two corresponding outer walls of the rear storage box. A core-pulling slider is slidably mounted on the outer walls of the two sidewall forming inserts corresponding to the lateral snap-fit ​​fasteners. The core-pulling slider is driven outward by a side-pulling mechanism. A core-pulling guide block is provided on the core-pulling slider, passing through the sidewall forming inserts and forming the sidewall. A corresponding demolding strip is slidably set in the insert, and a snap-fit ​​insert is set on the demolding strip. The snap-fit ​​insert cooperates with the side snap. The demolding strip cooperates with the core-pulling guide block through the oblique sliding guide mechanism. An external sliding cylinder is set at the bottom of each side wall forming insert. During demolding, the core plate and the cavity frame open the mold. During the mold opening process, the side pulling mechanism first drives the core-pulling slider to slide outward on the side wall forming insert. The core-pulling slider drives the core-pulling guide block to slide outward. Under the action of the oblique sliding guide mechanism, the demolding strip and the snap-fit ​​insert slide upward and outward, so that the snap-fit ​​insert is disengaged from the side snap. Then, the external sliding cylinder drives the side wall forming insert and the core-pulling slider to slide outward together, so that the side wall forming insert is demolded from the side wall of the rear storage box of the car's auxiliary instrument.

[0005] Preferably, the side-pulling mechanism includes an oblique guide hole on the core-pulling slider and an oblique guide rod connected below the cavity frame, the oblique guide rod cooperating with the oblique guide hole.

[0006] Preferably, the oblique sliding guide mechanism includes an oblique dovetail guide strip on the core-pulling guide block and an oblique dovetail guide groove on the demolding insert, wherein the oblique dovetail guide strip and the oblique dovetail guide groove cooperate with each other.

[0007] Preferably, a U-shaped wear-resistant plate is provided in the sidewall molding insert, and a U-shaped slide bar is provided on the demolding insert. The U-shaped slide bar slides in contact with the U-shaped wear-resistant plate, and the core-pulling guide block passes through the U-groove of the U-shaped wear-resistant plate.

[0008] Preferably, a fixing groove is provided in the core plate, the external hydraulic cylinder is fixed in the fixing groove, a 7-shaped connecting block is provided on the side wall forming insert, and the cylinder rod of the external hydraulic cylinder is connected to the 7-shaped connecting block.

[0009] The present invention provides a side-clamping demolding method for a rear storage box mold for automotive auxiliary instruments. Compared with existing demolding structures using an internal ejector plate, this method has the following advantages: This solution utilizes the working principle of an external sliding block driving a slanted guide mechanism for demolding. This causes the demolding insert and snap-fit ​​block to slide upwards and outwards, thereby disengaging the snap-fit ​​block from the side snap-fit. Then, the sidewall forming insert drives the external sliding block to slide out as a whole, demolding the product's sidewall. The sliding block combination and linkage demolding is compact, does not affect the mold's cooling water channel layout, provides precise guidance without vibration, and ensures stable and reliable operation. In particular, the sliding contact between the U-shaped slide bar and the U-shaped wear-resistant plate makes the demolding insert slide more smoothly. The U-shaped wear-resistant plate is wear-resistant, provides a tighter fit, reduces maintenance frequency, and extends service life. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of a mold structure for a rear storage box for an automotive auxiliary instrument panel according to the present invention; Figure 2 This is a three-dimensional schematic diagram of the assembly relationship between the sidewall molding insert and the core plate of the present invention; Figure 3 This is a three-dimensional schematic diagram of the assembly relationship between the sidewall molding insert and the outer sliding block of the present invention; Figure 4 This is a cross-sectional schematic diagram of the assembly relationship between the sidewall forming insert and the outer sliding block of the present invention; Figure 5 This is a schematic diagram of the assembly relationship between the demolding insert and the core-pulling guide block of the present invention.

[0011] The diagram shows: 1. Cavity frame; 2. Core plate; 3. Cavity insert; 4. Core insert; 5. Side wall forming insert; 6. Car auxiliary instrument panel rear storage box; 7. Mold cavity; 8. Side buckle; 9. Core-pulling slider; 10. Core-pulling guide block; 11. Demolding strip; 12. Buckle insert; 13. External hydraulic cylinder; 15. Angled guide hole; 16. Angled guide rod; 17. Angled dovetail guide bar; 18. Angled dovetail guide groove; 19. Fixing groove; 20. 7-shaped connecting block; 21. U-shaped wear-resistant plate; 22. U-shaped slide bar; 23. Ejector pin base plate; 24. Ejector pin panel; 25. Ejector pin; 26. Mold foot; 27. Core cover plate; 28. Through hole; 29. ​​Ejector rod; 30. Cavity cover plate; 31. Gate. Detailed Implementation

[0012] The present invention will be described in detail below with reference to specific implementation examples. These examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way.

[0013] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left" and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the position or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations of this invention.

[0014] In the description of this invention, unless otherwise explicitly specified and limited, terms such as "connection" and "fixation" should be interpreted broadly. For example, "fixation" can mean a fixed connection, a detachable connection, or an integral part; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0015] like Figure 1 — Figure 5 As shown, this invention relates to a method for demolding a rear storage box mold for an automotive instrument cluster using lateral snap-fit ​​fasteners. The mold includes a cavity frame 1 and a core plate 2. A cavity insert 3 is disposed within the cavity frame 1, and a core insert 4 is disposed on the core plate 2. Side wall forming inserts 5 are slidably disposed on the four sides of the core insert 4, forming a cavity 7 for filling the rear storage box 6 for the automotive instrument cluster. Lateral snap-fit ​​fasteners 8 are formed on two corresponding outer outer walls of the rear storage box 6. A core-pulling slider 9 is slidably disposed on the outer walls of the two side wall forming inserts 5 corresponding to the lateral snap-fit ​​fasteners 8. The core-pulling slider 9 is driven outward by a side-pulling mechanism, and a core-pulling guide block 10 is disposed on the core-pulling slider 9. The core-pulling guide block 10 passes through the side wall forming insert 5. A corresponding demolding strip 11 is slidably set in the side wall forming insert 5. A snap-fit ​​insert 12 is set on the demolding strip 11. The snap-fit ​​insert 12 cooperates with the side snap 8. The demolding strip 11 and the core-pulling guide block 10 cooperate through the oblique sliding guide mechanism. An external oil cylinder 13 is set at the bottom of each side wall forming insert 5. The side pulling mechanism includes an oblique guide hole 15 set on the core-pulling slider 9. An oblique guide rod 16 is connected to the cavity frame 1. The oblique guide rod 16 cooperates with the oblique guide hole 15. The oblique sliding guide mechanism includes an oblique dovetail guide strip 17 set on the core-pulling guide block 10. An oblique dovetail guide groove 18 is set on the demolding strip 11. The oblique dovetail guide strip 17 cooperates with the oblique dovetail guide groove 18.

[0016] Cavity frame 1 and cavity insert 3 are fixed on the mold frame of the injection molding machine. During demolding, the injection molding machine drives the core plate 2, core insert 4, side wall forming insert 5, core-pulling slider 9, and the rear storage box 6 of the automotive auxiliary instrument panel to move downwards, separating from the cavity frame 1 and cavity insert 3. The top outer wall of the rear storage box 6 of the automotive auxiliary instrument panel is released. During the mold opening process, since the inclined guide rod 16 is connected to the bottom of the cavity frame 1, with the cooperation of the inclined guide rod 16 and the inclined guide hole 15, the core-pulling slider 9 is first driven to slide outwards on the side wall forming insert 5, so that the core-pulling slider 9 drives the core-pulling guide block 10 outwards. When the core is pulled outward by the core-pulling guide block 10, the oblique dovetail guide strip 17 and oblique dovetail guide groove 18 cooperate to drive the demolding insert 11 and the snap-fit ​​insert 12 to slide upward and outward, so that the snap-fit ​​insert 12 is disengaged from the side snap-fit ​​8. Then, the outer sliding cylinder 13 drives the side wall forming insert 5 and the core-pulling slider 9 and other components on it to slide outward together, so that the side wall forming insert 5 is demolded from the side wall of the rear storage box 6 of the vehicle's auxiliary instrument panel. Finally, the ejection mechanism of the mold ejects the rear storage box 6 of the vehicle's auxiliary instrument panel from the core insert 4, and it is removed manually or by a robot arm. The demolding is completed.

[0017] The ejection mechanism generally consists of an ejector base plate 23, an ejector panel 24, and ejector pins 25, and is located below the core plate 2. The ejector pins 25 pass through the core plate 2 and the core insert 4 to contact the rear storage box 6 of the vehicle's auxiliary instrument panel. A cavity cover plate 30 is provided on the cavity frame 1, and a gate 31 is provided on the cavity cover plate. A hot runner system is provided in the cavity frame 1. The gate, the hot runner system, and the mold cavity are connected for injection and filling of the mold cavity. A mold foot 26 and a core cover plate 27 are also provided below the core plate 2. A perforation 28 is made in the core cover plate 27. A push rod 29 is provided on the injection molding machine. During the mold opening process, the push rod 29 passes through the perforation 28 and abuts against the ejector base plate 23, which in turn drives the ejector base plate 23, the ejector panel 24, and the ejector pins 25 to rise, thereby causing the ejector pins 25 to eject the rear storage box 6 of the vehicle's auxiliary instrument panel from the core insert 4.

[0018] Preferably, a U-shaped wear-resistant plate 21 is provided in the sidewall forming insert 5, and a U-shaped slide bar 22 is provided on the demolding insert 11. The U-shaped slide bar 22 slides in contact with the U-shaped wear-resistant plate 21. The U-shaped wear-resistant plate 21 is wear-resistant, and the U-shaped slide bar 22 slides more smoothly in cooperation with it. The core-pulling guide block 10 passes through the U-groove of the U-shaped wear-resistant plate 21 and can guide the sliding of the core-pulling guide block 10 to ensure accurate core-pulling action.

[0019] Preferably, a fixing groove 19 is provided in the core plate 2, and the external hydraulic cylinder 13 is fixed in the fixing groove 19. A 7-shaped connecting block 20 is provided on the side wall molding insert 5. The cylinder rod of the external hydraulic cylinder 13 is connected to the 7-shaped connecting block 20. That is, the external hydraulic cylinder is installed upside down in the fixing groove, which is not only securely installed, but also not placed on the outer side wall of the mold, reducing the mold volume and facilitating transportation. In particular, it is suitable for assembly in small and medium-sized injection molding machines.

[0020] The above specific embodiments are used to explain and illustrate the present invention, but not to limit the present invention. Any modifications and changes made to the present invention within the spirit and scope of the claims shall fall within the protection scope of the present invention.

Claims

1. A method for lateral snap-on demolding of a mold for a rear storage box of an automotive auxiliary instrument panel, characterized in that: The mold used by it includes the cavity frame (1) and the core plate (2) which are correspondingly arranged. The cavity insert (3) is arranged in the cavity frame (1), the core insert (4) is arranged on the core plate (2), the four sides of the core insert (4) are slidably arranged with the side wall forming inserts (5) which are mutually spliced, each side wall forming insert (5) and the core insert (4) and the cavity insert (3) form a mold cavity (7) for filling the automobile instrument rear storage box (6), two corresponding outer side walls of the automobile instrument rear storage box (6) are provided with lateral buckles (8), the outer walls of the two side wall forming inserts (5) corresponding to the lateral buckles (8) are each slidably provided with a core pulling slider (9), the core pulling slider (9) is driven to slide out by a side pulling mechanism, the core pulling slider (9) is provided with a core pulling guide block (10), the core pulling guide block (10) penetrates through the side wall forming insert (5), the corresponding demolding insert (11) is slidably arranged in the side wall forming insert (5), the demolding insert (11) is provided with a buckle insert (12), the buckle insert (12) is matched with the lateral buckle (8), the demolding insert (11) and the core pulling guide block (10) are matched through an inclined sliding guide mechanism, the bottom of each side wall forming insert (5) is provided with an outer sliding oil cylinder (13), during demolding, the core plate (2) and the cavity frame (1) are opened, during the opening process, the core pulling slider (9) is first driven to slide out on the side wall forming insert (5) by the side pulling mechanism, the core pulling slider (9) drives the core pulling guide block (10) to slide out, and under the action of the inclined sliding guide mechanism, the core pulling guide block (10) drives the demolding insert (11) and the buckle insert (12) to slide out upward, so that the buckle insert (12) is separated from the lateral buckle (8), and then the side wall forming insert (5) and the core pulling slider (9) are driven to slide out by the outer sliding oil cylinder (13), so that the side wall forming insert (5) is demolded from the side wall of the automobile instrument rear storage box (6).

2. The side snap demolding method of a rear storage box mold for an automobile auxiliary instrument as claimed in claim 1, wherein The side pulling mechanism includes an inclined guide hole (15) arranged on the core pulling slider (9), and an inclined guide rod (16) connected to the cavity frame (1), the inclined guide rod (16) is matched with the inclined guide hole (15).

3. The side snap demolding method of a rear storage box mold for an automobile auxiliary instrument as claimed in claim 1, wherein The inclined sliding guide mechanism includes an inclined dovetail guide strip (17) arranged on the core pulling guide block (10), and an inclined dovetail guide groove (18) arranged on the demolding insert (11), the inclined dovetail guide strip (17) is matched with the inclined dovetail guide groove (18).

4. The method of claim 1 wherein the side action snap demolding of an automotive instrument cluster rear storage box mold is characterized by The side wall forming insert (5) is provided with a U-shaped wear plate (21), the demolding insert (11) is provided with a U-shaped sliding strip (22), the U-shaped sliding strip (22) is in sliding contact with the U-shaped wear plate (21), and the core pulling guide block (10) penetrates through the U groove of the U-shaped wear plate (21).

5. The method of claim 1 wherein the side action snap demolding of an automotive instrument cluster rear storage box mold is characterized by The core plate (2) is provided with a fixed groove (19), the outer sliding oil cylinder (13) is fixed in the fixed groove (19), and the side wall forming insert (5) is provided with a 7-shaped connecting block (20), the oil cylinder rod of the outer sliding oil cylinder (13) is connected with the 7-shaped connecting block (20).

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