Garbage can outer can cover injection mold with assembly hole site core-pulling mechanism

Abstract

The utility model belongs to the technical field of molds, and particularly relates to a garbage can outer can cover injection mold with an assembly hole site core-pulling mechanism. The forming die comprises a lower forming die for the outer can cover of the garbage can and an upper forming die for the outer barrel of the garbage can. In the injection molding process, the garbage can outer barrel cover forming lower mold and the garbage can outer barrel forming upper mold are close to each other, so that the forming protrusions are matched with the forming concave cavities in an abutting mode, molten materials are injected into the cavities through the injection molding pieces, and the side assembly plate forming concave parts can synchronously form the side assembly plate structures of the injection molding pieces; the assembly hole site core-pulling structure can synchronously form assembly hole sites at assembly plates on the side portions of the plastic parts, the connecting shaft synchronous forming structure can synchronously form connecting shaft structures of the plastic parts, secondary machining treatment is not needed, the machining procedure is shortened, the assembly hole site core-pulling structure can avoid damage to the assembly hole sites during core-pulling demolding, and the production efficiency is improved. The integrity of assembly hole sites is ensured, and the quality and precision of plastic parts are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of molds and relates to an injection mold for a trash can outer cover with an assembly hole core pulling mechanism. Background Art

[0002] Plastic trash cans are generally assembled from a barrel body and a barrel cover, and the barrel body and the barrel cover are respectively injection molded by injection molds. The existing outer barrel cover of the trash can generally requires the use of assembly holes and connecting shaft structures during assembly to facilitate assembly with the barrel body. During the injection molding process, the current mold for the outer barrel cover of the trash can is difficult to synchronously mold the assembly holes and connecting shaft structure of the barrel cover, and secondary processing is required. There are many processing steps and it is easy to damage the plastic parts. Therefore, it is urgent to design an injection mold for the outer barrel cover of the trash can with an assembly hole core pulling mechanism that can overcome the above defects.

[0003] In order to overcome the shortcomings of the prior art, people have proposed various solutions through continuous exploration. For example, a Chinese patent discloses an injection mold for a square-top hat-shaped trash can cover [application number: 202220118477.X], which includes a molding bottom mold and a molding upper mold. A lower cavity is arranged on the upper side of the molding bottom mold, and an upper cavity whose opening matches the shape of the lower cavity is arranged at the bottom of the molding upper mold. A rear mold insert is fixedly installed on the lower cavity of the molding bottom mold, and the space between the outer wall of the rear mold insert and the inner wall of the molding bottom mold and the molding upper mold forms an injection molding cavity of the injection molding bucket cover body. Connector lower mold cavities matching the shape of the connector of the bucket cover body are arranged on both sides of the top of the rear mold insert, and the connector upper mold cavities arranged on both sides of the upper cavity of the molding upper mold form an injection molding cavity of the connector. Utility Model Content

[0004] The utility model aims to solve the above problems and provides an injection mould for a trash can outer cover with an assembly hole core pulling mechanism.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A garbage can outer cover injection mold with an assembly hole core pulling mechanism, comprising a garbage can outer cover molding lower mold and a garbage can outer tube molding upper mold, the garbage can outer cover molding lower mold is provided with a molding protrusion and a side assembly plate molding recess, the garbage can outer tube molding upper mold is provided with a molding cavity and an assembly hole core pulling structure, a connecting shaft synchronous molding structure is provided between the molding protrusion and the molding cavity, the side assembly plate molding recess is arranged opposite to the assembly hole core pulling structure, and an injection molded part is provided above the garbage can outer tube molding upper mold.

[0007] In the above-mentioned trash can outer barrel cover injection mold with an assembly hole core-pulling mechanism, the assembly hole core-pulling structure includes a plurality of assembly hole forming rods arranged in the upper mold of the trash can outer barrel, and the assembly hole forming rods are arranged opposite to the side assembly plate forming recess.

[0008] In the above-mentioned trash can outer lid injection mold with an assembly hole core pulling mechanism, the assembly hole molding rod body consists of a hole rod portion and a hole cap rod portion, and the diameter of the hole rod portion is smaller than the diameter of the hole cap rod portion.

[0009] In the above-mentioned trash can outer cover injection mold with assembly hole core pulling mechanism, the side assembly plate molding recess includes a plurality of side assembly plate molding cavities arranged on the trash can outer cover molding lower mold, and the side assembly plate molding cavities and molding protrusions are arranged alternately.

[0010] In the above-mentioned trash can outer lid injection mold with assembly hole core pulling mechanism, the connecting shaft synchronous molding structure includes two end alignment protrusions arranged on the molding protrusion, and the connecting shaft molding lower groove is arranged in the end alignment protrusion.

[0011] In the above-mentioned injection mold for the outer lid of the trash can with an assembly hole core-pulling mechanism, two end alignment cavities are provided in the molding cavity, a connecting shaft molding upper groove is provided in the alignment cavity, the end alignment cavities are arranged opposite to the end alignment protrusions, and the connecting shaft molding upper groove is arranged opposite to the connecting shaft molding lower groove.

[0012] In the above-mentioned trash can outer barrel cover injection mold with assembly hole core pulling mechanism, the injection molded part includes an injection molded main board arranged above the trash can outer barrel molding upper mold.

[0013] In the above-mentioned trash can outer barrel cover injection mold with assembly hole core pulling mechanism, an ejection demolding piece is provided below the trash can outer barrel cover molding lower mold, and the ejection demolding piece is slidably matched with the trash can outer barrel cover molding lower mold.

[0014] In the above-mentioned trash can outer cover injection mold with assembly hole core pulling mechanism, the ejection demolding part includes an ejector rod fixing plate arranged below the trash can outer cover molding lower mold, and the ejector rod fixing plate is provided with a plurality of ejector straight rods.

[0015] In the above-mentioned trash can outer lid injection mold with an assembly hole core-pulling mechanism, anti-deflection irons are provided on both sides of the ejector rod fixing plate, and the ejector rod fixing plate is slidably matched with the anti-deflection irons.

[0016] Compared with the existing technology, the advantages of the utility model are:

[0017] 1. During the injection molding process, the utility model brings the trash can outer cover molding lower mold and the trash can outer cylinder molding upper mold close to each other, so that the molding protrusion and the molding cavity are abutted and matched, and the molten material is injected into the cavity through the injection molded part. The side assembly plate molding concave portion can synchronously mold the side assembly plate structure of the plastic part, the assembly hole core pulling structure can synchronously mold the assembly hole at the side assembly plate of the plastic part, and the connecting shaft synchronous molding structure can synchronously mold the connecting shaft structure of the plastic part. No secondary processing is required, which shortens the processing steps. The assembly hole core pulling structure can avoid damage to the assembly hole during core pulling and demoulding, thereby ensuring the integrity of the assembly hole and improving the quality and precision of the plastic part.

[0018] 2. The end alignment cavity in the utility model cooperates with the end alignment protrusion, and the upper groove for forming the connecting shaft cooperates with the lower groove for forming the connecting shaft, so that the connecting shaft structure of the plastic part can be formed synchronously without the need for secondary processing, thus shortening the processing steps. In addition, the open groove structure is adopted, which will not affect the ejection of the connecting shaft position after the mold is opened, thereby ensuring the integrity of the connecting shaft.

[0019] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the utility model.

[0021] Figure 2 It is a partial structural schematic diagram of the utility model.

[0022] Figure 3 It is a schematic diagram of the structure of the ejector.

[0023] Figure 4 It is a structural schematic diagram of the upper die for forming the outer tube of a trash can.

[0024] In the figure: the lower mold 1 for forming the outer cover of the trash can, the upper mold 2 for forming the outer tube of the trash can, the molding protrusion 3, the molding concave part 4 of the side assembly plate, the molding cavity 5, the core-pulling structure 6 of the assembly hole, the synchronous molding structure 7 of the connecting shaft, the injection molded part 8, the assembly hole molding rod body 9, the hole rod part 10, the hole cap rod part 11, the molding cavity 12 of the side assembly plate, the end alignment protrusion 13, the connecting shaft molding lower groove 14, the end alignment cavity 15, the connecting shaft molding upper groove 16, the injection molded main board 17, the ejection demolding part 18, the ejection rod fixing plate 19, the ejection straight rod 20, and the anti-deflection iron 21. DETAILED DESCRIPTION

[0025] The utility model is further described below in conjunction with the accompanying drawings.

[0026] like Figure 1-4As shown, an injection mold for a trash can outer barrel cover with an assembly hole core-pulling mechanism comprises a trash can outer barrel cover molding lower mold 1 and a trash can outer barrel molding upper mold 2, the trash can outer barrel cover molding lower mold 1 is provided with a molding protrusion 3 and a side assembly plate molding recess 4, the trash can outer barrel molding upper mold 2 is provided with a molding cavity 5 and an assembly hole core-pulling structure 6, a connecting shaft synchronous molding structure 7 is provided between the molding protrusion 3 and the molding cavity 5, the side assembly plate molding recess 4 is arranged opposite to the assembly hole core-pulling structure 6, and an injection molded part 8 is provided above the trash can outer barrel molding upper mold 2.

[0027] In this embodiment, during the injection molding process, the trash can outer cover molding lower mold 1 and the trash can outer tube molding upper mold 2 are brought close to each other, so that the molding protrusion 3 is abutted against the molding cavity 5, and the molten material is injected into the cavity through the injection molded part 8. The side assembly plate molding recess 4 can synchronously mold the side assembly plate structure of the plastic part, the assembly hole core pulling structure 6 can synchronously mold the assembly hole at the side assembly plate of the plastic part, and the connecting shaft synchronous molding structure 7 can synchronously mold the connecting shaft structure of the plastic part. There is no need for secondary processing, which shortens the processing steps, and the assembly hole core pulling structure 6 can avoid damage to the assembly hole during core pulling and demolding, thereby ensuring the integrity of the assembly hole and improving the quality and precision of the plastic part.

[0028] Combination Figure 1-4 As shown, the assembly hole core-pulling structure 6 includes a plurality of assembly hole forming rods 9 arranged in the trash can outer cylinder forming upper mold 2, and the assembly hole forming rods 9 are arranged opposite to the side assembly plate forming recess 4.

[0029] Specifically, during the injection molding process, the assembly hole forming rod 9 cooperates with the side assembly plate forming recess 4 to simultaneously form the assembly hole at the side assembly plate of the plastic part.

[0030] The assembly hole forming rod body 9 is composed of a hole rod portion 10 and a hole cap rod portion 11 . The diameter of the hole rod portion 10 is smaller than the diameter of the hole cap rod portion 11 .

[0031] In this embodiment, the hole rod 10 is used to form the hole at the side assembly plate of the plastic part, and the hole cap rod 11 is used to form the cap hole at the side assembly plate of the plastic part. The diameter of the hole rod 10 is smaller than the diameter of the hole cap rod 11. When the core is pulled out and demolded, damage to the assembly hole can be avoided, and jamming will not occur, thereby ensuring the integrity of the assembly hole and improving the quality and precision of the plastic part.

[0032] Combination Figure 2 , Figure 4 As shown, the side assembly plate forming recess 4 includes a plurality of side assembly plate forming cavities 12 arranged on the trash can outer barrel cover forming lower mold 1, and the side assembly plate forming cavities 12 and the forming protrusions 3 are arranged alternately.

[0033] In this embodiment, the side assembly plate forming cavity 12 is used to assist in forming the side assembly plate of the plastic part.

[0034] The connecting shaft synchronous forming structure 7 includes two end alignment protrusions 13 arranged on the forming protrusion 3, and a connecting shaft forming lower groove 14 is arranged in the end alignment protrusion 13, and two end alignment cavities 15 are arranged in the forming cavity 5, and a connecting shaft forming upper groove 16 is arranged in the alignment cavity 15, and the end alignment cavity 15 is arranged opposite to the end alignment protrusion 13, and the connecting shaft forming upper groove 16 is arranged opposite to the connecting shaft forming lower groove 14.

[0035] In this embodiment, the end alignment cavity 15 cooperates with the end alignment protrusion 13, and the upper groove 16 for forming the connecting shaft cooperates with the lower groove 14 for forming the connecting shaft, so that the connecting shaft structure of the plastic part can be formed synchronously without the need for secondary processing, thereby shortening the processing steps. In addition, the open groove structure is adopted, which will not affect the ejection of the connecting shaft position after the mold is opened, thereby ensuring the integrity of the connecting shaft.

[0036] The injection molded part 8 includes an injection molded main board 17 disposed above the upper mold 2 for molding the outer cylinder of the trash can.

[0037] In this embodiment, the molten material is injected into the mold cavity through the injection molding main board 17 .

[0038] Combination Figure 1-3 As shown, an ejector demolding member 18 is provided below the trash can outer barrel cover forming lower mold 1, and the ejector demolding member 18 is slidably matched with the trash can outer barrel cover forming lower mold 1, and the ejector demolding member 18 includes an ejector rod fixing plate 19 arranged below the trash can outer barrel cover forming lower mold 1, and a plurality of ejector straight rods 20 are provided on the ejector rod fixing plate 19.

[0039] In this embodiment, after the injection molding is completed and the mold is opened, the ejector rod fixing plate 19 is moved, and the molded plastic part is ejected by the ejector straight rod 20 .

[0040] Combination Figure 1-3 As shown, anti-deflection irons 21 are provided on both sides of the ejector rod fixing plate 19, and the ejector rod fixing plate 19 is slidably matched with the anti-deflection irons 21.

[0041] In this embodiment, during the ejection process, the anti-deflection iron 21 can prevent the ejection rod fixing plate 19 from angular deviation, thereby improving the ejection accuracy.

[0042] The working principle of the utility model is:

[0043] During the injection molding process, the trash can outer cover molding lower mold 1 and the trash can outer barrel molding upper mold 2 are brought close to each other, so that the molding protrusion 3 is abutted against the molding cavity 5, and the molten material is injected into the cavity through the injection molding main board 17. The side assembly plate molding cavity 12 can synchronously mold the side assembly plate structure of the plastic part. The assembly hole molding rod body 9 cooperates with the side assembly plate molding recess 4 to synchronously mold the assembly hole position at the side assembly plate of the plastic part. The hole position rod 10 is used to mold the hole position at the side assembly plate of the plastic part, and the hole cap rod 11 is used to mold the cap hole at the side assembly plate of the plastic part. The diameter of the hole position rod 10 is smaller than the diameter of the hole cap rod 11. When the core is pulled out and demolded, damage to the assembly hole position can be avoided, and jamming will not occur, thereby ensuring the integrity of the assembly hole position and improving the quality and precision of the plastic part.

[0044] The end alignment cavity 15 cooperates with the end alignment protrusion 13, and the upper groove 16 for forming the connecting shaft cooperates with the lower groove 14 for forming the connecting shaft, so that the connecting shaft structure of the plastic part can be formed synchronously without the need for secondary processing, thus shortening the processing steps. In addition, the open groove structure is adopted, which will not affect the ejection of the connecting shaft position after the mold is opened, thus ensuring the integrity of the connecting shaft.

[0045] After the injection molding is completed and the mold is opened, the ejector rod fixing plate 19 is moved, and the molded plastic part is ejected through the ejector straight rod 20. During the ejection process, the anti-deflection iron 21 can prevent the ejector rod fixing plate 19 from angular deviation, thereby improving the ejection accuracy.

[0046] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways without departing from the spirit of the present invention.

[0047] Although this article uses more terms such as the trash can outer cover molding lower mold 1, trash can outer barrel molding upper mold 2, molding protrusion 3, side assembly plate molding concave 4, molding cavity 5, assembly hole core pulling structure 6, connecting shaft synchronous molding structure 7, injection molded part 8, assembly hole molding rod body 9, hole rod 10, hole cap rod 11, side assembly plate molding cavity 12, end alignment protrusion 13, connecting shaft molding lower groove 14, end alignment cavity 15, connecting shaft molding upper groove 16, injection molding main board 17, ejection demoulding part 18, ejection rod fixing plate 19, ejection straight rod 20, anti-deflection iron 21, etc., it does not exclude the possibility of using other terms. The use of these terms is only to more conveniently describe and explain the essence of the utility model, and interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. An injection mold for a trash can outer barrel cover having an assembly hole core pulling mechanism, comprising a trash can outer barrel cover molding lower mold (1) and a trash can outer barrel molding upper mold (2), characterized in that: The trash can outer barrel cover molding lower mold (1) is provided with a molding protrusion (3) and a side assembly plate molding recess (4), the trash can outer barrel molding upper mold (2) is provided with a molding cavity (5) and an assembly hole core pulling structure (6), a connecting shaft synchronous molding structure (7) is provided between the molding protrusion (3) and the molding cavity (5), the side assembly plate molding recess (4) and the assembly hole core pulling structure (6) are arranged opposite to each other, and an injection molded part (8) is provided above the trash can outer barrel molding upper mold (2).

2. The injection mold for the outer cover of the trash can with the assembly hole core pulling mechanism according to claim 1, characterized in that: The assembly hole core pulling structure (6) comprises a plurality of assembly hole forming rods (9) arranged in the upper mold (2) of the outer tube of the trash can, and the assembly hole forming rods (9) are arranged opposite to the side assembly plate forming recess (4).

3. The injection mold for the outer cover of the trash can with the assembly hole core pulling mechanism according to claim 2, characterized in that: The assembly hole forming rod body (9) is composed of a hole rod portion (10) and a hole cap rod portion (11), and the diameter of the hole rod portion (10) is smaller than the diameter of the hole cap rod portion (11).

4. The injection mold for the outer cover of the trash can with the assembly hole core pulling mechanism according to claim 3, characterized in that: The side assembly plate forming recess (4) comprises a plurality of side assembly plate forming cavities (12) arranged on a lower forming die (1) of a trash can outer cover, and the side assembly plate forming cavities (12) and the forming protrusions (3) are arranged alternately.

5. The injection mold for the outer cover of the trash can with the assembly hole core pulling mechanism according to claim 4, characterized in that: The connecting shaft synchronous forming structure (7) comprises two end alignment protrusions (13) arranged on the forming protrusion (3), and a connecting shaft forming lower groove (14) is arranged in the end alignment protrusion (13).

6. The injection mold for the outer cover of the trash can with the assembly hole core pulling mechanism according to claim 5, characterized in that: Two end alignment cavities (15) are arranged in the molding cavity (5), and a connecting shaft molding upper groove (16) is arranged in the alignment cavity (15). The end alignment cavities (15) are arranged opposite to the end alignment protrusions (13), and the connecting shaft molding upper groove (16) is arranged opposite to the connecting shaft molding lower groove (14).

7. The injection mold for the outer cover of the trash can with the assembly hole core pulling mechanism according to claim 1, characterized in that: The injection molded part (8) comprises an injection molded main board (17) arranged above the upper mold (2) for molding the outer cylinder of the garbage can.

8. The injection mold for the outer cover of the trash can with the assembly hole core pulling mechanism according to claim 1, characterized in that: An ejection demoulding member (18) is provided below the trash can outer barrel cover forming lower mold (1), and the ejection demoulding member (18) is slidably matched with the trash can outer barrel cover forming lower mold (1).

9. The injection mold for the outer cover of the trash can with the assembly hole core pulling mechanism according to claim 8, characterized in that: The ejection demoulding member (18) comprises an ejection rod fixing plate (19) arranged below the lower mold (1) for forming the outer cover of the trash can, and a plurality of ejection straight rods (20) are arranged on the ejection rod fixing plate (19).

10. The injection mold for the outer cover of the trash can with the assembly hole core pulling mechanism according to claim 9, characterized in that: Anti-deflection irons (21) are provided on both sides of the ejector rod fixing plate (19), and the ejector rod fixing plate (19) and the anti-deflection irons (21) are slidably matched.

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