A structure for demolding an inverted hole site product

Abstract

The utility model discloses a structure of inverted buckle hole position product demoulding, including the product mould for product forming in the mould cavity and the demoulding assembly for realizing the demoulding of the product formed on the product mould in the mould cavity, the demoulding assembly includes the slider seat of linear movement along the horizontal direction, and the inner spade base is equipped in the slider seat, and the tail portion of inner spade base is equipped with the needle plate on the upper end, and the needle plate is equipped with the inlay needle of passing through the product mould and being in the outside, and the inlay needle is used for forming the hole body in the forming process of product, wherein, the tail portion of inner spade base and needle plate lower end surface assembly form the inclined guide rail, and when the inner spade base linearly moves horizontally, the needle plate synchronously does the vertical linear movement, and the inlay needle on the needle plate can pass through the product mould to the outside and retract to the product mould, mainly through the design product mould and demoulding assembly, and the smooth demoulding can be completed to the product with inverted buckle hole position.

Description

Technical Field

[0001] This utility model relates to the field of mold demolding technology, specifically a structure for demolding products with undercut holes. Background Technology

[0002] Mold demolding refers to the operation of removing a product from a mold after it has been formed during the manufacturing process. Generally, a product consists of two parts: an upper mold and a lower mold. After being formed in the mold cavity, the molded part is smoothly removed from the mold by mold separation.

[0003] Traditional demolding methods mostly employ simple mold designs, allowing for demolding after a single molding process. However, with increasing product design complexity, especially in the production of certain specific products, traditional demolding methods become inadequate. For instance, in the production of products requiring screw holes, the screw hole design along the demolding direction of the mold may exhibit an undercut. Due to this structural characteristic, conventional sliding block systems cannot successfully complete demolding, leading to demolding difficulties and potentially damaging the product or mold. In such cases, traditional mold designs and demolding methods cannot meet production requirements; therefore, we need to optimize the mold structure to solve this problem. Utility Model Content

[0004] The purpose of this invention is to provide a demolding structure for products with undercut holes, addressing the technical problem that traditional conventional sliders cannot achieve demolding for products with holes.

[0005] This utility model is implemented as follows: a demolding structure for products with undercut holes includes a product mold placed in a mold cavity for product forming, and a demolding assembly in the mold cavity for demolding the product formed on the product mold. The demolding assembly includes a slider seat that moves linearly in the horizontal direction. The slider seat has an inner shovel base. The inner shovel base has a tail extending outward along the back of the slider seat. An ejector plate is assembled at the upper end of the tail of the inner shovel base. The ejector plate has inserts that can pass through the product mold and be located outside the mold. The inserts are used to form holes in the product during the forming process. The tail of the inner shovel base and the lower end face of the ejector plate are assembled to form an inclined guide rail. When the inner shovel base moves horizontally linearly, the ejector plate moves vertically linearly at the same time. The inserts on the ejector plate can pass through the product mold to the outside and retract into the product mold.

[0006] Furthermore, the demolding assembly also includes an inclined guide post, a slider base, and an inner shovel base inside the slider base, which are respectively provided with a first inclined through hole and a second inclined through hole for the inclined guide post to pass through. The first inclined through hole and the second inclined through hole are interconnected. By driving the inclined guide post, the inner shovel base and the slider base can be driven to move linearly in the horizontal direction.

[0007] Furthermore, the horizontal diameter of the second oblique perforation matches the horizontal diameter of the oblique guide post, the horizontal diameter of the first oblique perforation is greater than the horizontal diameter of the oblique guide post, and the inner shovel base can move linearly in the horizontal direction of the slider seat.

[0008] Furthermore, the slider base is provided with a horizontal linear track for the linear movement of the inner shovel base. The horizontal linear track connects the back and front of the slider base, and a stroke limit pin is provided in the horizontal linear track. The inner shovel base is provided with an arc-shaped opening to accommodate the stroke limit pin, and the horizontal diameter of the arc-shaped opening is larger than the horizontal diameter of the stroke limit pin.

[0009] Furthermore, the inner shovel base is provided with a gradually downward-sloping inner guide block at the tail end, and the lower end face of the ejector plate is an upper inclined outer guide rail that is assembled on the lower inclined surface.

[0010] Furthermore, before demolding, the product mold adheres to the back of the slider seat, as well as the tail of the inner spade base and the upper end of the ejector plate.

[0011] Furthermore, a pressure block is provided at the lower end of the ejector plate. The pressure block has an exposed part that is exposed to the outside relative to the ejector plate. The exposed part is fixed to the product mold by screws. A guide post is provided at the upper end of the pressure block that passes through the ejector plate. A guide sleeve that matches the guide post is provided on the ejector plate.

[0012] Furthermore, when the product mold is attached to the back of the slider seat, the upper pin of the ejector plate is outside the mold, and the lower end face of the ejector plate and the pressure block have a gap as the stroke for the ejector plate to move in the vertical direction. As the back of the slider seat gradually detaches from the product mold, the ejector plate gradually moves down to be close to the pressure block, and the upper pin of the ejector plate gradually retracts into the product mold.

[0013] Furthermore, the upper end of the ejector plate is provided with a return spring for buffering, and the lower end of the product mold is provided with a slot to accommodate the return spring.

[0014] Furthermore, the pins on the ejector plate are multiple.

[0015] Compared with the prior art, the beneficial effects of this utility model are: This type of demolding structure for products with undercut holes is mainly achieved by designing the product mold and demolding components, which enables smooth demolding of products with undercut holes.

[0016] This type of demolding structure for products with undercut holes uses a drive inclined guide post to move the inner shovel base horizontally on the sliding seat, thereby completing the up-and-down movement of the insert and the separation of the hole. At the same time, the inclined guide post can synchronously complete the horizontal displacement of the inner shovel base and the sliding seat as a whole, completing the overall separation.

[0017] This type of undercut hole product demolding structure has a return spring on the ejector plate that contacts the product mold. When the mold is closed and demolded, it can serve two purposes: firstly, to position the insert pin for piercing and demolding; secondly, when the ejector plate separates from the lower end face of the product mold, the return spring can improve the demolding effect through its elastic force. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the assembly structure of the insert pin penetrating the product mold to the outside. Figure 2 Based on Figure 1 Schematic diagram of the demolding component structure in the middle state; Figure 3 This is a schematic diagram of the assembly structure of the present invention, showing the pin retracting into the product mold. Figure 4 Based on Figure 3 Schematic diagram of the demolding component structure in the middle state; Figure 5 This is an exploded structural diagram of the present invention; Figure 6 This is a schematic diagram of the slider seat structure; Figure 7 Based on Figure 2 Schematic diagram of a local structure in the middle; Figure 8 This is a schematic diagram of the bottom structure of the product mold; Figure 9 This is a schematic diagram of the installation structure of the ejector plate and the pressure block.

[0019] The labels in the attached figures are as follows: Product mold - 1, demolding assembly - 2, slider base - 3, inner spade base - 4, ejector plate - 5, insert pin - 6 Inclined guide rail-7, inclined guide post-8, pressure block-9; First oblique through hole - 41, arc-shaped opening - 42, lower oblique inner guide block - 43, second oblique through hole - 31, horizontal linear track - 32, travel limit pin - 33, upper oblique outer guide rail - 51, guide sleeve - 52, exposed part - 91, guide post - 92, gap - 53, return spring - 54, slot - 11. Detailed Implementation

[0020] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0022] The following description, in conjunction with the accompanying drawings and specific embodiments, provides further details: See attached document Figure 1 To be continued Figure 9 As shown, a demolding structure for a product with an undercut hole includes a product mold 1 placed in a mold cavity for product forming, and a demolding assembly 2 in the mold cavity for demolding the product formed on the product mold 1. The demolding assembly 2 includes a slider seat 3 that moves linearly in the horizontal direction. The slider seat 3 is provided with an inner spade base 4. The inner spade base 4 has a tail extending outward along the back of the slider seat 3, and an ejector plate 5 is assembled on the upper end of the tail of the inner spade base 4. The ejector plate 5 is provided with insert pins 6 that can pass through the product mold 1 and are located outside the mold. The insert pins 6 are used to form holes in the product during the forming process. The tail of the inner spade base 4 and the lower end face of the ejector plate 5 are assembled to form an inclined guide rail 7. When the inner spade base 4 moves horizontally linearly, the ejector plate 5 moves vertically linearly at the same time. The insert pins 6 on the ejector plate 5 can pass through the product mold 1 to the outside and retract into the product mold 1.

[0023] The design of this technical solution mainly covers the product mold 1 and the demolding component 2. Through careful design of these two key structures, it is ensured that the produced product can accurately form the screw hole positions during the mold closing and injection molding process. At the same time, during the demolding process, the solution effectively solves the problem of the insert pin 6 detaching from the product hole position, thereby realizing the undercut demolding operation method.

[0024] refer to Figure 5 As shown, the product mold 1 is provided with a lower contact part and a side contact part at its bottom and side, which are connected to the demolding component 2. This is to ensure smooth operation during the demolding process. At the same time, the product mold 1 is provided with several clearance holes that pass through the bottom and are connected to the lower contact part.

[0025] The demolding assembly 2 consists of three core parts: the slider base 3, the inner spade base 4, and the ejector plate 5. They work together to ensure an efficient demolding process.

[0026] In the assembly design of the slider base 3 and the inner spade base 4, the inner spade base 4 is precisely installed inside the slider base 3. A dedicated horizontal linear track 32 is designed inside the slider base 3 to allow the inner spade base 4 to move smoothly and linearly along the track. This horizontal linear track 32 runs through the back and front of the slider base 3, ensuring that the inner spade base 4 maintains precise positioning and smooth movement throughout the demolding process. Simultaneously, the horizontal length of the inner spade base 4 is greater than the length of the horizontal linear track 32, allowing both ends of the inner spade base 4 to pass through the back and front of the slider base 3, further enhancing the flexibility and adaptability of the assembly.

[0027] Reference Appendix Figure 7 As shown, in the assembly design of the ejector plate 5 and the inner spade base 4, the inner spade base 4 has a gradually downward-sloping inner guide block 43 at its tail, while the lower end face of the ejector plate 5 is designed as an upper inclined outer guide rail 51 that cooperates with the lower inclined inner guide block 43. Through the cooperation of the lower inclined inner guide block 43 and the upper inclined outer guide rail 51, an inclined guide rail 7 system can be formed between the inner spade base 4 and the ejector plate 5, ensuring the stable movement of the ejector plate 5 and effectively improving the demolding accuracy.

[0028] Reference Appendix Figure 1 Appendix Figure 2 Appendix Figure 9 As shown, in the assembly design of the ejector plate 5 and the product mold 1, the lower end of the ejector plate 5 is also equipped with a pressure block 9. The pressure block 9 can be used to support the ejector plate 5, and the end of the pressure block 9 has an exposed part 91, which is fixedly connected to the product mold 1 by screws. The upper end of the pressure block 9 is provided with a guide post 92 passing through the ejector plate 5, and the ejector plate 5 is equipped with a guide sleeve 52 that matches the guide post 92. Through the cooperation of the guide post 92 and the guide sleeve 52, the ejector plate 5 can move up and down in the vertical direction. The fixed assembly of the pressure block 9 and the product mold 1 allows the ejector plate 5 to move freely up and down between the pressure block 9 and the product mold 1 (a gap 53 is left between the pressure block 9 and the product mold 1 for the ejector plate 5 to move up and down), thereby realizing flexible demolding operation.

[0029] Therefore, when the inner shovel base 4 moves horizontally within the slider seat 3, the ejector plate 5 can move up and down synchronously, achieving a precise demolding process. Multiple insert pins 6 mounted on the upper end of the ejector plate 5 move synchronously within the clearance holes on the product mold 1 as the ejector plate 5 moves up and down. These insert pins 6 can smoothly pass through the product mold 1 and enter the outside during mold closing, forming holes during product molding, or retract from the product holes back into the product mold 1 after demolding, ensuring smooth product demolding and maintaining an efficient production process.

[0030] The above describes the main structural components and working principle for achieving smooth undercut demolding in the product's holes.

[0031] The horizontal movement of the inner shovel base 4 on the sliding seat is achieved by the inclined guide post 8 connected to the external upper mold assembly. At the same time, the inner shovel base 4 inside the slider seat 3 is provided with a first inclined through hole 41 and a second inclined through hole 31 for the inclined guide post 8 to pass through. The first inclined through hole 41 and the second inclined through hole 31 are interconnected. By driving the inclined guide post 8, the inner shovel base 4 and the slider seat 3 can be moved linearly in the horizontal direction. Before demolding, the product mold 1 is attached to the back of the slider seat 3, the tail of the inner shovel base 4, and the upper end of the ejector plate 5. During the demolding process, the inclined guide post 8 will first drive the inner shovel base 4 to move until the inclined guide post 8 contacts the end position of the second inclined through hole 31. This process is the process in which the slider seat 3 does not move and the inner shovel base 4 moves. A travel limit pin 33 is provided in the horizontal linear track 32, and an arc-shaped opening 42 is provided on the inner shovel base 4 to accommodate the travel limit pin 33. The horizontal diameter of the arc-shaped opening 42 is larger than the horizontal diameter of the travel limit pin 33. This design, in conjunction with the movement of the inclined guide post 8 in the second inclined through hole 31, moves by abutting against the travel limit pin 33 through the arc-shaped opening 42, thereby driving the inclined guide post 8 to enable the inner shovel base 4 to move synchronously and stably as an integral unit with the slider seat 3.

[0032] Reference Appendix Figure 1 To be continued Figure 4 The working principle achieved by combining the above structure is as follows: (1) Before initial demolding, the product mold 1 is attached to the left side of the slider seat 3, the tail of the inner spade base 4, and the upper end of the ejector plate 5. The insert pin 6 at the upper end of the ejector plate 5 passes through the product mold 1 and protrudes to the outside to form holes in the product during the molding process. (2) During the mold opening process, the inclined guide post 8 moves upward and drives the inner shovel base 4 to move along the right side of the horizontal linear track 32 in the slider seat 3 through the second inclined through hole 31. At this time, the lower inclined inner guide block 43 at the tail of the inner shovel base 4 moves to the right synchronously. At this time, the ejector plate 5 at the tail of the inner shovel base 4 moves synchronously under the action of the lower inclined inner guide block 43 and the upper inclined outer guide rail 51, as well as the guide sleeve 52 and the pressure block 9 on the ejector plate 5, thereby finally driving the insert pin 6 on the ejector plate 5 to retract from the outside into the product mold 1. At this time, the right end face of the inclined guide post 8 moves to the right end of the first inclined through hole 41 for contact.

[0033] (3) When the inclined guide post 8 moves to the right and contacts the right end of the first inclined through hole 41, the ejector plate 5 moves down to contact the pressure block 9. The pressure block 9 is fixed and assembled with the mold cavity. Thus, the pressure block 9 supports the ejector plate 5.

[0034] (4) As the inclined guide post 8 continues to move to the right, the pressure block 9 supports the ejector plate 5, while the slider seat 3 and the inner shovel base 4 form a whole and continue to move to the right synchronously until the mold opening is completed, and the inclined guide post 8 disengages from the first inclined through hole 41 and the second inclined through hole 31.

[0035] Since the direct mold closing between the upper and lower molds is not the core of this technology, it will not be elaborated upon further.

[0036] Further, see Appendix Figure 2 Appendix Figure 4 Appendix Figure 7 As shown, the upper end of the ejector plate 5 is also provided with a buffer return spring 54, and the lower end of the product mold 1 is provided with a slot 11 to accommodate the return spring 54. When the mold is closed and demolded, it can play a role in positioning the insert pin 6 for perforation and demolding. On the other hand, when the ejector plate 5 separates from the lower end face of the product mold 1, the return spring 54 can effectively improve the demolding effect through its elastic force, making the demolding process smoother and more efficient. The elastic effect of the return spring 54 not only helps to enhance the demolding force, but also effectively reduces the potential damage caused by friction and resistance during the demolding process, ensuring the stability and long-term reliability of the mold.

[0037] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A demolding structure for products with undercut holes, characterized in that, It includes a product mold (1) placed in a mold cavity for product molding, and a demolding assembly (2) placed in the mold cavity for demolding the product molded on the product mold (1). The demolding assembly (2) includes a slider seat (3) that moves linearly in the horizontal direction. The slider seat (3) has an inner spade base (4). The inner spade base (4) has a tail extending outward along the back of the slider seat (3). An ejector plate (5) is assembled on the upper end of the tail of the inner spade base (4). The ejector plate (5) has insert pins (6) that can pass through the product mold (1) and are located on the outside. The insert pins (6) are used to form holes in the product during the molding process. Among them, the tail of the inner shovel base (4) is assembled with the lower end face of the ejector plate (5) to form an inclined guide rail (7). When the inner shovel base (4) moves horizontally and linearly, the ejector plate (5) moves vertically and linearly at the same time. The insert pin (6) on the ejector plate (5) can pass through the product mold (1) to the outside and retract into the product mold (1).

2. The demolding structure for a product with undercut holes according to claim 1, characterized in that, The demolding assembly (2) also includes an inclined guide post (8), a slider seat (3), and an inner shovel base (4) inside the slider seat (3) respectively provided with a first inclined through hole (41) and a second inclined through hole (31) for the inclined guide post (8) to pass through. The first inclined through hole (41) and the second inclined through hole (31) are connected to each other. By driving the inclined guide post (8), the inner shovel base (4) and the slider seat (3) can be driven to move linearly in the horizontal direction.

3. The demolding structure for a product with undercut holes according to claim 2, characterized in that, The horizontal diameter of the second oblique through hole (31) matches the horizontal diameter of the oblique guide post (8), the horizontal diameter of the first oblique through hole (41) is greater than the horizontal diameter of the oblique guide post (8), and the inner shovel base (4) can move linearly in the horizontal direction of the slider seat (3).

4. The demolding structure for a product with undercut holes according to claim 3, characterized in that, The slider seat (3) is provided with a horizontal linear track (32) for the inner shovel base (4) to move linearly. The horizontal linear track (32) connects the back and front of the slider seat (3). The horizontal linear track (32) is provided with a stroke limit pin (33). The inner shovel base (4) is provided with an arc-shaped opening (42) to accommodate the stroke limit pin (33). The horizontal diameter of the arc-shaped opening (42) is larger than the horizontal diameter of the stroke limit pin (33).

5. The demolding structure for a product with undercut holes according to claim 1, characterized in that, The inner shovel base (4) has a gradually downward inclined inner guide block (43) at its tail end, and the lower end face of the ejector plate (5) is an upper inclined outer guide rail (51) that is assembled on the lower inclined surface.

6. The demolding structure for a product with undercut holes according to claim 1, characterized in that, Before demolding, the product mold (1) is attached to the back of the slider seat (3), the tail of the inner shovel base (4), and the upper end of the ejector plate (5).

7. The demolding structure for a product with undercut holes according to claim 6, characterized in that, The lower end of the ejector plate (5) is also provided with a pressure block (9). The pressure block (9) has an exposed part (91) that is exposed to the outside relative to the ejector plate (5). The exposed part (91) is fixed to the product mold (1) by screws. The upper end of the pressure block (9) is provided with a guide post (92) that passes through the ejector plate (5). The ejector plate (5) is provided with a guide sleeve (52) that matches the guide post (92).

8. The demolding structure for a product with undercut holes according to claim 7, characterized in that, When the product mold (1) is attached to the back of the slider seat (3), the upper pin (6) of the ejector plate (5) is outside, and the lower end face of the ejector plate (5) and the pressure block (9) have a gap (53) as the stroke of the ejector plate (5) moving in the vertical direction. As the back of the slider seat (3) gradually detaches from the product mold (1), the ejector plate (5) gradually moves down to be close to the pressure block (9), and the upper pin (6) of the ejector plate (5) gradually retracts into the product mold (1).

9. The demolding structure for a product with undercut holes according to claim 1, characterized in that, The upper end of the ejector plate (5) is also provided with a buffer return spring (54), and the lower end of the product mold (1) is provided with a slot (11) to accommodate the return spring (54).

10. The demolding structure for a product with undercut holes according to claim 1, characterized in that, There are multiple pins (6) on the ejector plate (5).

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