Demolding mechanism for forming inverted buckle on inner side of product

Abstract

The utility model relates to a demolding mechanism for molding an inverted buckle on the inner side of a product, which comprises an inner core-pulling structure arranged in a mold frame, and the inner core-pulling structure is communicated with an injection molding cavity of the mold frame and is used for molding an inverted buckle part on the end surface of the inner side of the product and demolding the inverted buckle part; the inner core pulling structure at least comprises a sliding seat capable of being driven by the upper die plate, the sliding seat is provided with a pulling core through a connecting rod, and the side end face of the pulling core is matched with the shape of an inverted buckling part of a product. And the sliding seat drives the loose core to laterally withdraw from the reverse buckling part through the connecting rod. Compared with the prior art, the inner core-pulling structure has the beneficial effects that the inner core-pulling structure is arranged to form the back-off part of the side wall, and then the back-off part is demoulded through lateral movement, so that the risk that the back-off part is strained during mould opening is avoided, and the yield of products is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to a demoulding mechanism for inner undercutting of molded products. Background Art

[0002] Injection molds can form complex product structures, so injection products are widely used in industrial product manufacturing. In the processing of injection molded products, it is often encountered that the product has an "undercut" structure that is inconsistent with the mold opening direction, such as inward buckle, outward buckle, upward convexity, downward concave, side concave, and side convexity, which affects the complete mold opening of the product. The solution is usually to make a mold opening plan, and two common structures such as "inclined ejector" and "slider" are commonly used.

[0003] In particular, in some product designs, especially in the shell structure of automobile headlights, in order to install the lamp body inside the headlight, undercuts are usually set on the inner wall of the shell. The demolding direction of such undercuts is at right angles to the mold opening direction. The simple mold opening method in the prior art cannot completely demold the undercut parts, which leads to the need to change the product structure design plan, reduces product innovation, and increases product manufacturing costs. Utility Model Content

[0004] In order to solve the above problems existing in the prior art, the utility model provides a demoulding structure for undercutting the inner side of a molded product.

[0005] The above-mentioned problem of the utility model is solved by the following technical solutions:

[0006] A demoulding mechanism for the inner undercut of a molded product, comprising an inner core pulling structure arranged in a mold frame, the inner core pulling structure being connected to an injection molding cavity of the mold frame, and being used for the undercut part on the inner end surface of the molded product, and demoulding the undercut part;

[0007] The inner core-pulling structure at least comprises a slide seat that can be driven by the upper template, the slide seat is provided with a core-pulling device through a connecting rod, and the side end surface of the core-pulling device matches the shape of the undercut part of the product;

[0008] The slide seat drives the core pulling device to withdraw laterally from the undercut position through the connecting rod.

[0009] The above technical solution is further configured as follows: the lower end of the connecting rod is slidably connected to the core pulling device, and the core pulling device has an inclined sliding path relative to the connecting rod.

[0010] The above technical solution is further configured as follows: a first slide groove is provided at the lower end of the connecting rod, a first slide rail cooperating with the first slide groove is provided on the core pulling device, the first slide groove is inclined, and the upper end of the first slide groove is close to one side of the undercut part.

[0011] The further setting of the above technical solution is: the upper end of the connecting rod is movably connected to the end of the sliding seat, and the sliding seat can move horizontally on the upper template, driving the connecting rod to move in the vertical direction.

[0012] The further setting of the above technical solution is: a second sliding groove is provided at the end of the sliding seat, and a second sliding rail matching with the second sliding groove is provided at the end of the connecting rod.

[0013] The further setting of the above technical solution is: a guiding component is embedded in the upper template, and a guiding hole for limiting the connecting rod is opened on the guiding component;

[0014] The connecting rod is arranged through the guiding hole.

[0015] The further setting of the above technical solution is: a stop portion is provided on the connecting rod, and the stop portion forms interference with the guiding component to stop the movement of the guiding component on the connecting rod.

[0016] The further setting of the above technical solution is: the sliding seat is driven by a cylinder, and the cylinder is arranged on the side of the upper template.

[0017] The further setting of the above technical solution is: a plurality of anti-wear blocks are embedded on the outer wall of the sliding seat.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0019] 1. An internal core-pulling structure is provided to form the undercut part on the side wall, and then the undercut part is demolded through lateral movement, avoiding the risk of the undercut part being scratched during mold opening and improving the product yield;

[0020] 2. An inclined sliding groove and sliding rail driving structure is provided. By utilizing the displacement characteristics of the inclined structure, the setting of transmission components is saved, the unstable factors generated during the transmission process are avoided, and the cost is saved at the same time. Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of the present utility model.

[0022] Figure 2 It is a schematic separation structure diagram of the internal core-pulling structure and the undercut part.

[0023] Figure 3 It is a schematic exploded structure diagram of the internal core-pulling structure.

[0024] Figure 4 It is a top view of the internal core-pulling structure.

[0025] Figure 5 It is in the injection molding state Figure 4Schematic diagram of the cross-sectional structure of the AA part.

[0026] Figure 6 When demoulding the undercut part Figure 4 Schematic diagram of the cross-sectional structure of the AA part.

[0027] Marking on the attached drawings: 100, upper template;

[0028] 200, slide seat; 201, second slide slot;

[0029] 300, connecting rod; 310, second slide rail; 301, first slide groove; 320, stopper;

[0030] 400, core pulling; 410, first slide rail;

[0031] 500, cylinder;

[0032] 600, guide components;

[0033] 700, anti-wear block;

[0034] 1. Product; 1.1. Undercut part. DETAILED DESCRIPTION

[0035] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0036] like Figures 1-6 As shown, this embodiment discloses a demoulding structure for undercutting the inner side of a molded product.

[0037] A demoulding mechanism for the inner side undercut of a molded product, comprising an inner core pulling structure arranged in a mold frame, the inner core pulling structure being connected to an injection molding cavity of the mold frame, and being used for the undercut portion 1.1 on the inner side end surface of the molded product 1, and demoulding the undercut portion 1.1;

[0038] The inner core-pulling structure at least comprises a slide 200 that can be driven by the upper template 100, and the slide 200 is provided with a core-pulling 400 through a connecting rod 300, and the side end surface of the core-pulling 400 matches the shape of the undercut portion 1.1 of the product 1;

[0039] The slide 200 drives the core puller 400 to withdraw laterally from the undercut portion 1.1 through the connecting rod 300.

[0040] The above is the basic solution of this embodiment.

[0041] Specific reference Figure 1 and Figure 2As shown, the upper template 100 and the lower template are closed to form an injection cavity. The injection plastic enters the injection cavity through the injection runner to form a product 1 that is consistent with the injection cavity. When the mold is opened, the upper template 100 and the lower template are separated. Since in this embodiment, the undercut part 1.1 is located in the inner side wall of the product 1, pulling the undercut part 1.1 during the mold opening process will damage the undercut part 1.1. Therefore, an internal core-pulling structure 400 is provided on the upper template 100 to perform the demolding of the undercut part 1.1 before the mold is opened; the side end face of the core-pulling 400 of the internal core-pulling structure matches the shape of the undercut part 1.1, and the outer shape of the undercut part 1.1 is formed during the injection process. Before the mold is opened, the internal core-pulling structure is first withdrawn laterally from the undercut part 1.1 to separate the undercut part 1.1 from the core-pulling 400, and then the upper template 100 and the lower template are opened, avoiding the risk of the undercut part 1.1 being damaged during the mold opening process and improving the yield of the product 1.

[0042] The mold base structure in this embodiment is the same as the mold base structure of conventional molds in the prior art and will not be elaborated here.

[0043] In order to prevent the sliding block 200 from rubbing against the upper template 100 during the sliding process and causing wear, in this embodiment, a plurality of anti-wear blocks 700 are embedded on the outer wall of the sliding block 200.

[0044] Specifically, in this embodiment, the lower end of the connecting rod 300 is slidably connected to the core-pulling 400, and the core-pulling 400 has an inclined sliding path relative to the connecting rod 300.

[0045] Setting the sliding path of the core-pulling 400 as an inclined structure has the advantage that when the connecting rod 300 drives the core-pulling 400 in the vertical or horizontal direction, the core-pulling 400 can move in an inclined direction relative to the connecting end of the connecting rod 300. That is to say, the core-pulling 400 has not only a displacement in the same direction as the movement direction of the connecting rod 300 but also a displacement perpendicular to this direction, that is, it has two displacements at the same time; using this feature, one movement direction of the connecting rod 300 can be converted into another movement direction of the core-pulling 400, thereby performing lateral demolding.

[0046] Compared with setting multiple transmission structures to convert the movement direction of the core-pulling 400, the setting of this embodiment saves the setting of transmission components, avoids unstable factors generated during the transmission process, and saves costs at the same time.

[0047] Among them, a first chute 301 is provided at the lower end of the connecting rod 300, and a first slide rail 410 that cooperates with the first chute 301 is provided on the core-pulling 400. The first chute 301 is inclined, and the upper end of the first chute 301 is close to the undercut part 1.1 side.

[0048] Specific referenceFigure 3 As shown, the first slide groove 301 is inclined, and the lower end is far away from the undercut part 1.1 in the horizontal direction; in the mold closing state, the first slide rail 410 is located at the upper end of the first slide groove 301, that is, close to the undercut part 1.1 side, see Figure 5 As shown; after forming the undercut part 1.1; the slide seat 200 drives the connecting rod 300 to move upward, so that the first slide groove 301 also moves upward, and the first slide rail 410 is limited in the vertical direction. Therefore, when the first slide groove 301 moves upward, the first slide rail 410 slides to the lower end of the first slide groove 301. Since the lower end of the first slide groove 301 is far away from the undercut part 1.1 in the horizontal direction, the first slide rail 410 drives the core puller 400 to also move away from the undercut part 1.1. For details, refer to Figure 6 shown.

[0049] In this embodiment, the connecting rod 300 moves vertically in the upper template 100 under the driving action of the slide 200, and is specifically configured as follows: the upper end of the connecting rod 300 is movably connected to the end of the slide 200, and the slide 200 can move horizontally on the upper template 100, driving the connecting rod 300 to move vertically.

[0050] The upper mold plate 100 is provided with an embedding groove capable of accommodating the movement of the slide 200 . The slide 200 can slide back and forth along the embedding groove under the action of the driving component, thereby driving the connecting rod 300 and the core pulling 400 .

[0051] Specifically, in this embodiment, a second slide groove 201 is disposed at the end of the slide seat 200 , and a second slide rail 310 matched with the second slide groove 201 is disposed at the end of the connecting rod 300 .

[0052] Similar to the driving principle of the first slide groove 301 on the first slide rail 410, in this embodiment, the second slide groove 201 is also configured as an inclined slide groove, and the position of the outer end is higher than the position of the inner end;

[0053] When the slide 200 is in the first position, that is, the unpulled position, the second slide rail 310 is located at the inner end of the second slide groove 201. At this time, the connecting rod 300 is in a low position; when the slide 200 moves outward under the action of the driving component, the connecting rod 300 cannot move therewith. At this time, the second slide rail 310 slides to the outer end of the second slide groove 201. At this time, the upper end position of the connecting rod 300 rises, thereby causing the entire connecting rod 300 to move upward.

[0054] Preferably, in this embodiment, the first slide groove 301 is configured to have an inclined path on the yz plane, and the second slide groove 201 is configured to have an inclined path on the xz plane.

[0055] Preferably, in this embodiment, the first slide groove 301 and the second slide groove 201 are both configured as T-shaped slide grooves, and the first slide rail 410 and the second slide rail 310 are also configured as T-shaped slide rails. The T-shaped slide rails are automatically limited to the T-shaped slide groove and can only escape from the end of the slide groove during sliding.

[0056] In order to ensure the position of the connecting rod 300 during the movement, in this embodiment, a guide component 600 is embedded in the upper template 100, and a guide hole for limiting the position of the connecting rod 300 is opened on the guide component 600;

[0057] The connecting rod 300 is disposed through the guide hole.

[0058] Specific reference Figure 3 As shown, in this embodiment, the guide component 600 is a block-shaped component, and the inner diameter of the guide hole is consistent with the diameter of the connecting rod 300, which can accommodate the connecting rod 300 to pass through;

[0059] In addition to ensuring that the connecting rod 300 moves in the vertical direction, the guide component 600 is also provided with a stopper 320 on the connecting rod 300 . The stopper 320 interferes with the guide component 600 , thereby stopping the movement of the guide component 600 on the connecting rod 300 .

[0060] Specifically, in this embodiment, a cutting edge is provided on the upper periphery of the connecting rod 300 so that the outer diameter of the lower part of the connecting rod 300 is larger than the outer diameter of the upper part. The stop portion 320 is a step surface formed at the boundary between the two parts, and the guide hole cooperates with the upper part of the connecting rod 300. When the connecting rod 300 slides, the guide component 600 can only slide in the upper area. When the guide component 600 is stopped by the stop portion 320, it slides to the highest position.

[0061] Preferably, the slide 200 is driven by a cylinder 500 , and the cylinder 500 is disposed on a side of the upper template 100 .

[0062] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A demoulding mechanism for undercutting the inner side of a molded product, comprising an inner core pulling structure arranged in a mold frame, the inner core pulling structure being connected to an injection molding cavity of the mold frame, and being used for undercutting a portion (1.1) on an inner side end surface of a molded product (1), and demoulding the undercutting portion (1.1); Features: The inner core-pulling structure at least comprises a slide seat (200) that can be driven by the upper template (100), the slide seat (200) being provided with a core-pulling (400) via a connecting rod (300), and the side end surface of the core-pulling (400) matches the shape of the undercut portion (1.1) of the product (1); The slide seat (200) drives the core puller (400) to withdraw laterally from the undercut portion (1.1) via the connecting rod (300).

2. The demoulding mechanism for inner undercut of molded products according to claim 1, characterized in that: The lower end of the connecting rod (300) is slidably connected to the core puller (400), and the core puller (400) has an inclined sliding path relative to the connecting rod (300).

3. The demoulding mechanism for inner undercut of molded products according to claim 2, characterized in that: A first slide groove (301) is arranged at the lower end of the connecting rod (300), and a first slide rail (410) cooperating with the first slide groove (301) is arranged on the core pulling device (400). The first slide groove (301) is arranged at an angle, and the upper end of the first slide groove (301) is close to the side of the undercut part (1.1).

4. The demoulding mechanism for inner undercut of molded products according to claim 1, characterized in that: The upper end of the connecting rod (300) is movably connected to the end of the slide seat (200), and the slide seat (200) can move horizontally on the upper template (100) to drive the connecting rod (300) to move in the vertical direction.

5. The demoulding mechanism for inner undercut of molded products according to claim 4, characterized in that: A second slide groove (201) is provided at the end of the slide seat (200), and a second slide rail (310) matched with the second slide groove (201) is provided at the end of the connecting rod (300).

6. The demoulding mechanism for inner undercut of a molded product according to any one of claims 1 to 5, characterized in that: A guide component (600) is embedded in the upper template (100), and a guide hole for limiting the position of the connecting rod (300) is provided on the guide component (600); The connecting rod (300) is arranged through the guide hole.

7. The demoulding mechanism for inner undercut of molded products according to claim 6, characterized in that: The connecting rod (300) is provided with a stopper portion (320), and the stopper portion (320) interferes with the guide component (600), thereby forming a stopper for the movement of the guide component (600) on the connecting rod (300).

8. The demoulding mechanism for inner undercut of molded products according to claim 1, characterized in that: The slide seat (200) is driven by a cylinder (500), and the cylinder (500) is arranged on the side of the upper template (100).

9. The demoulding mechanism for inner undercut of molded products according to claim 1, characterized in that: A plurality of anti-wear blocks (700) are embedded on the outer wall of the sliding seat (200).

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