Hole forming mechanism

Abstract

A hole forming mechanism, comprising a first abutting member (1), a second abutting member (2), and a foaming mold. The foaming mold comprises an upper mold (3), an inner core mold (4), and a lower mold (5). A forming cavity (6) is formed at the space between the upper mold (3) and the inner core mold (4) and between the lower mold (5) and the inner core mold (4). The first abutting member (1) is made of an aluminum alloy. The second abutting member (2) is made of engineering plastic. The first abutting member (1) and the second abutting member (2) are integrally formed in the foaming mold, and thus, the structure of the first abutting member (1) and the second abutting member (2) is more stable, thereby effectively avoiding displacement of the first abutting member (1) and the second abutting member (2) caused by repeated abutment against each other and collision with each other. Integral forming of the second abutting member (2) leads to smaller errors than a manual fitting and mounting mode, and thus, burrs at formed holes on formed shoes in the hole forming process of the shoes can be effectively avoided, thereby ensuring the quality of the formed holes on the shoes, and improving the working efficiency.

Description

A hole forming mechanism Technical Field

[0001] The utility model belongs to the technical field of foaming molding equipment, in particular to a hole-forming mechanism. Background Art

[0002] Shoe molds typically refer to molds for sports shoes, beach shoes, slippers, rubber shoes, and other footwear, with sports shoes being the most common. Molds refer to the various molds and tools used in industrial production to produce the desired product through methods such as injection molding, blow molding, extrusion, die-casting, forging, smelting, stamping, and stretching.

[0003] Crocs, also known as garden shoes, are a type of slippers. The upper has multiple light holes for ventilation. Traditional molds for making Crocs are mostly foaming molds. Specifically, the movable mold core of the foaming mold is provided with a first abutment column protruding and extending into the molding cavity, and the upper position of the shoe is provided with a second abutment column that can abut the first abutment column. After the two groups of abutment columns abut, a column structure of interference foaming material that penetrates the upper molding cavity can be formed. After foaming is completed, light holes are formed at the positions of the two groups of abutment columns.

[0004] There is a utility model patent with announcement number CN216884908U, named "Hole-forming Mechanism and Foaming Mold". The hole-forming mechanism and foaming mold disclosed in this patent drive the upper mold 30 or the inner core mold 20 to move toward the lower mold 10 through a driving source, so that after the upper mold 30 or the inner core mold 20 and the lower mold 10 are closed, the first abutment 41 and the second abutment 42 abut to form a columnar structure that can interfere with the flow of the foaming polymer. The foaming polymer fills the first gap and the second gap and is fixed into shape. The hole-forming part of the molded shoe body is formed with multiple light hole structures through the columnar structure; the foaming mold is reset, and the first abutment 41 and the second abutment 42 move back to back to demold the molded shoe body. The hole-forming mechanism and the second abutment 42 of the foaming mold provided by this patent are fixed on the upper mold or the inner mold by manual inlaying. During the manual inlaying and fixing process, errors are likely to occur, resulting in deviations in the installation position of the second abutment 42. During the hole-forming process of the shoe body, burrs are likely to appear on the shoe body forming holes, which can easily lead to poor shoe body quality and require manual removal of burrs, reducing work efficiency. During operation, the first abutment 41 and the second abutment 42 abut against each other to form a columnar structure that can interfere with the flow of the foamed polymer. Since the second abutment 42 is fixed by inlaying, the first abutment 41 and the second abutment 42 are prone to position deviation under repeated abutment and collision, which can further lead to burrs on the shoe body forming holes, affecting the quality of the shoe body forming holes and reducing work efficiency.

[0005] Utility Model Content

[0006] The purpose of the utility model is to provide a hole-forming mechanism, aiming to solve the technical problems in the prior art that burrs are easily generated in the shoe body forming holes, which easily lead to defective shoe bodies and require manual removal of the burrs, thereby reducing work efficiency.

[0007] To achieve the above-mentioned purpose, an embodiment of the present utility model provides a hole-forming mechanism, including a first abutment member, a second abutment member and a foaming mold, the first abutment member and the second abutment member are both arranged in the foaming mold, the first abutment member and the second abutment member are integrally formed in the foaming mold, the foaming mold includes an upper mold, an inner core mold and a lower mold, the holes between the upper mold and the inner core mold and between the lower mold and the inner core mold form a molding cavity, the ends of the first abutment member and the second abutment member extend into the molding cavity and abut against each other; wherein, the first abutment member is made of metal alloy and the second abutment member is made of engineering plastic.

[0008] As an optional solution of the present invention, a second abutment member forming cavity is provided in the inner core mold, and the second abutment member is integrally formed in the second abutment member forming cavity.

[0009] As an optional solution of the present invention, the first abutting member and the upper mold are integrally formed.

[0010] As an optional solution of the present invention, the cross-section of the first abutment member is larger than that of the second abutment member, and after the first abutment member and the second abutment member abut against each other at their opposite end faces, a step structure is formed between the first abutment member and the second abutment member.

[0011] As an optional solution of the present invention, the first abutting member and the second abutting member are both cylindrical, and the axes of the first abutting member and the second abutting member are on the same straight line.

[0012] As an optional solution of the present invention, the end side walls of the first abutment member and the second abutment member that are opposite to each other are respectively formed with a first chamfered structure and a second chamfered structure. The end side wall of the first abutment member is smoothly connected to the inner wall of the molding cavity through the first chamfered structure, and the end side wall of the second abutment member is smoothly connected to the inner wall of the molding cavity through the second chamfered structure.

[0013] As an optional solution of the present invention, the first abutting member is made of aluminum alloy.

[0014] The above one or more technical solutions in the hole-forming mechanism provided by the embodiment of the present invention have at least one of the following technical effects:

[0015] The present application provides a hole-forming mechanism, in which the first abutment member and the second abutment member are integrally formed in a foaming mold. The structure of the first abutment member and the second abutment member is more stable, which can effectively prevent the first abutment member and the second abutment member from easily shifting in position when they repeatedly abut and collide. The second abutment member is integrally formed, which has smaller errors than the manual inlay installation method, and can effectively prevent burrs from appearing on the shoe body forming holes during the shoe body forming process, thereby ensuring the quality of the shoe body forming holes and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0017] FIG1 is a schematic structural diagram of a hole-forming mechanism provided in Example 1 of the present utility model.

[0018] FIG2 is a schematic structural diagram of a first abutting member and a second abutting member of a hole-forming mechanism provided in Example 1 of the present invention, which are not injection molded.

[0019] FIG3 is a schematic structural diagram of a first abutting member and a second abutting member of a hole-forming mechanism provided in Example 1 of the present utility model.

[0020] FIG4 is a schematic structural diagram of a first abutting member and a second abutting member with a chamfered structure of a hole-forming mechanism provided in Example 1 of the present invention.

[0021] Among them, the reference numerals in the figures are: 1, first abutting member; 2, second abutting member; 3, upper mold; 4, inner core mold; 5, lower mold; 6, molding cavity. DETAILED DESCRIPTION

[0022] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0023] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0025] In the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium; internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0026] Example 1:

[0027] In one embodiment of the present invention, as shown in Figures 1 to 4, a hole-forming mechanism is provided, as shown in Figures 1 to 2, comprising a first abutment 1, a second abutment 2 and a foaming mold, the first abutment 1 and the second abutment 2 are both arranged in the foaming mold, the first abutment 1 and the second abutment 2 are integrally formed in the foaming mold, the foaming mold comprises an upper mold 3, an inner core mold 4 and a lower mold 5, the holes between the upper mold 3 and the inner core mold 4 and the lower mold 5 and the inner core mold 4 form a molding cavity 6, the ends of the first abutment 1 and the second abutment 2 extend into the molding cavity 6 and are abutted; wherein, the first abutment 1 is made of metal alloy, specifically, the first abutment 1 is made of aluminum alloy, and the second abutment 2 is made of engineering plastic, the first abutment 1 is made of hard metal material, and the second abutment 2 is made of soft engineering plastic, and the collision of hard metal material and soft engineering plastic makes it easier to form a columnar structure that can interfere with the flow of foamed polymer. At the same time, engineering plastics have excellent durability, corrosion resistance, and heat resistance, eliminating the need for frequent replacement of the first and second abutment members 1 and 2, reducing maintenance frequency and improving production efficiency. Furthermore, engineering plastics have excellent mechanical ductility, allowing the two sets of abutment members to fit more tightly during impact, effectively reducing burrs and ensuring product quality.

[0028] The present application provides a hole-forming mechanism, as shown in Figures 1 and 2, in which the first abutment 1 and the second abutment 2 are integrally formed in the foaming mold. The structures of the first abutment 1 and the second abutment 2 are more stable, which can effectively prevent the first abutment 1 and the second abutment 2 from easily shifting in position when they repeatedly abut and collide. The second abutment 2 is integrally formed, which has a smaller error than the manual inlay installation method, and can effectively prevent burrs from easily appearing in the shoe body forming holes during the shoe body forming process, thereby ensuring the quality of the shoe body forming holes and improving work efficiency.

[0029] In another embodiment of the present invention, as shown in Figures 1 and 2, a second abutment molding cavity is provided in the inner core mold 4 of the hole-forming mechanism, and the second abutment 2 is integrally molded in the second abutment molding cavity, and the structure is more stable. An injection molding machine is used to inject engineering plastic liquid raw materials into the second abutment molding cavity, and the engineering plastic liquid raw materials enter the second abutment molding cavity and are cooled and molded to form the second abutment 2. The second abutment 2 is more stable and has smaller errors by using an integral injection molding method, which can effectively avoid the burrs that are easy to appear in the shoe body molding hole during the shoe body molding process, thereby ensuring the quality of the shoe body molding hole and improving work efficiency.

[0030] In another embodiment of the present invention, as shown in Figures 1 and 3, the cross-section of the first abutment 1 of the hole-forming mechanism is larger than that of the second abutment 2. After the first abutment 1 and the second abutment 2 abut against each other, a step structure is formed between the first abutment 1 and the second abutment 2. After the first abutment 1 and the second abutment 2 are abutted against each other for many times, even if the end faces of the first abutment 1 and the second abutment 2 are deformed, the end face of one of the abutments will form a groove structure that covers the end of the other abutment, and the fit between the first abutment 1 and the second abutment 2 will still be tight, further improving the durability of the abutments. Furthermore, the first abutment 1 and the second abutment 2 are both cylindrical, and the axes of the first abutment 1 and the second abutment 2 are on the same straight line to ensure that the end faces of the first abutment 1 and the second abutment 2 can abut smoothly.

[0031] In another embodiment of the present invention, as shown in FIG4 , the first and second abutting members 1 and 2 of the hole-forming mechanism have opposing end sidewalls formed with first and second chamfered structures, respectively. The end sidewall of the first abutting member 1 smoothly borders the inner wall of the forming cavity 6 via the first chamfered structure, while the end sidewall of the second abutting member 2 smoothly borders the inner wall of the forming cavity 6 via the second chamfered structure. After the shoe body is formed, the chamfered structure is formed along the edge of the forming hole to prevent the edge of the forming hole from scratching the user's foot.

[0032] Example 2:

[0033] As shown in Figure 2, a hole-forming mechanism provided by an embodiment of the present invention can also directly integrally form a second abutment 2 on the inner core mold 4. The other structures are the same as those in Example 1. In this embodiment, the first abutment 1 and the second abutment 2 are integrally formed. While reducing errors, the strength of the first abutment 1 and the second abutment 2 can also be enhanced, thereby effectively avoiding the occurrence of burrs in the shoe body forming holes during the shoe body forming process.

[0034] The present application provides a hole-forming mechanism, and the working process is as follows: a driving source drives the upper mold 3 or the inner core mold 4 to move toward the lower mold 5, so that the upper mold 3 or the inner core mold 4 and the lower mold are closed 5, and the first abutment 1 and the second abutment 2 form a main structure that can interfere with the flow of the foaming polymer. The foaming polymer fills the molding cavity 6 and is fixed to form. The hole molding part of the molded shoe body is formed with multiple light hole structures through the column structure; the foaming mold is reset, and the first abutment 1 and the second abutment 2 move back to back to demold the molded shoe body.

[0035] The present application provides a hole-forming mechanism, in which the first abutment 1 and the second abutment 2 are integrally formed in the foaming mold. The structure of the first abutment 1 and the second abutment 2 is more stable, which can effectively prevent the first abutment 1 and the second abutment 2 from easily shifting in position when they repeatedly abut and collide. The second abutment 2 is integrally formed, which has a smaller error than the manual inlay installation method, and can effectively prevent burrs from easily appearing in the shoe body forming holes during the shoe body forming process, thereby ensuring the quality of the shoe body forming holes and improving work efficiency.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A hole forming mechanism, characterized in that: It includes a first abutment member, a second abutment member and a foaming mold, wherein the first abutment member and the second abutment member are both arranged in the foaming mold, and the first abutment member and the second abutment member are integrally formed in the foaming mold, and the foaming mold includes an upper mold, an inner core mold and a lower mold, and the holes between the upper mold and the inner core mold and between the lower mold and the inner core mold form a molding cavity, and the ends of the first abutment member and the second abutment member extend into the molding cavity and are abutted; wherein the first abutment member is made of metal alloy, and the second abutment member is made of engineering plastic.

2. A hole forming mechanism according to claim 1, characterized in that: A second abutment member forming cavity is provided in the inner core mold, and the second abutment member is integrally formed in the second abutment member forming cavity.

3. A hole forming mechanism according to claim 1, characterized in that: The first abutment member is integrally formed with the upper mold.

4. A hole forming mechanism according to claim 1, characterized in that: The cross section of the first abutting member is larger than that of the second abutting member. After the end surfaces of the first abutting member and the second abutting member facing each other abut, a step structure is formed between the first abutting member and the second abutting member.

5. A hole forming mechanism according to claim 1, characterized in that: The first abutting member and the second abutting member are both cylindrical, and the axes of the first abutting member and the second abutting member are on the same straight line.

6. A hole forming mechanism according to claim 1, characterized in that: The end side walls of the first abutment member and the second abutment member which are opposite to each other are respectively formed with a first chamfered structure and a second chamfered structure. The end side wall of the first abutment member is smoothly connected to the inner wall of the molding cavity through the first chamfered structure, and the end side wall of the second abutment member is smoothly connected to the inner wall of the molding cavity through the second chamfered structure.

7. A hole forming mechanism according to claim 1, characterized in that: The first abutting member is made of aluminum alloy.

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