Injection mold for inner barrel of garbage can

Abstract

The utility model discloses an injection mold for an inner barrel of a garbage can. The injection mold comprises a bottom mold assembly, an upper mold assembly, a side mold assembly and a core mold assembly, as the mold is generally horizontally and transversely placed in an injection molding machine, a bottom mold assembly is arranged on the left side as an example (but not limited to the installation mode) by taking the position relation of the use condition of the mold as description. The bottom die assembly is horizontally arranged, an opening is formed in the right end of the bottom die assembly, and a cavity is formed in the middle. The bottom die assembly comprises an end plate, a die holder and a bottom die; the end plate is vertically arranged at the left end, and the right side is connected with the horizontally arranged die holder; a die cavity is formed in the middle of the die holder; the die cavity comprises a side die cavity used for installing the side die assembly, a bottom die cavity used for installing the bottom die and a core die cavity used for installing the core die assembly. The injection mold for the inner barrel of the garbage can is simple and reasonable in structure and stable and reliable in operation; the outer diameters of the base and the flange at the upper end of the inner barrel are both larger than the radius of the barrel body.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, and particularly relates to an injection mold for an inner barrel of a trash can. Background Art

[0002] At present, with the improvement of living quality, the styles of indoor trash cans have gradually become diversified. They are no longer the products formed by integral injection molding in the past. The styles and compositions of trash cans have also become diversified. Especially for composite trash cans, they include an inner barrel and an outer barrel. When in use, a garbage bag can be sleeved on the inner barrel, and then the outer barrel is sleeved on the inner barrel, so as to ensure that the garbage bag is stably sleeved on the inner barrel. At the same time, the outer edge of the garbage bag and the part sleeved on the outer wall of the trash can cannot be seen, which plays a role in beautifying and stabilizing the garbage bag.

[0003] However, since the structures of the above-mentioned inner barrel and outer barrel are different from those of conventional trash cans, a new type of injection mold is required to facilitate their molding and demolding. Due to the fact that the outer diameters of the base and the upper flange of the above-mentioned inner barrel are both larger than the barrel body in the middle section, the difficulty of its molding and demolding is increased, as shown in Figure 5 , Figure 6 shown. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an injection mold for an inner barrel of a trash can, which has a simple and reasonable structure, stable and reliable operation; can efficiently inject, mold and demold, and mold an inner barrel with the outer diameters of the base and the upper flange both larger than the radius of the barrel body in the middle section.

[0005] In order to solve the above technical problems, the technical solution of the utility model is as follows:

[0006] An injection mold for an inner barrel of a trash can includes a bottom mold assembly, an upper mold assembly, a side mold assembly, and a core mold assembly (named according to the molding part of the inner barrel);

[0007] Since the mold of the present application is generally horizontally placed in an injection molding machine, the position relationship in its use scenario is described. Taking the bottom mold assembly being on the left side as an example (but not limited to this installation method).

[0008] The bottom mold assembly is horizontally arranged, with an opening at its right end and a concave cavity in the middle; the bottom mold assembly includes an end plate, a mold base, and a bottom mold; the end plate is vertically arranged at the left end, and its right side is connected to the horizontally arranged mold base; a mold cavity is provided in the middle of the mold base; the mold cavity includes a side mold cavity for installing the side mold assembly, a bottom mold cavity for installing the bottom mold, and a core mold cavity for installing the core mold assembly.

[0009] The side mold assembly is arranged on the inner wall of the mold cavity of the mold base, the bottom mold is arranged at the left end of the mold cavity (the bottom end when placed vertically), and the core mold assembly is arranged in the middle of the mold cavity; the gap area between the side mold assembly, the bottom mold, the upper mold assembly and the core mold assembly is the forming area of the inner barrel. Therefore, a cylindrical cavity is provided in the middle of the side mold assembly; the core mold assembly is inserted into the cylindrical cavity, and the left end of the core mold assembly is the bottom mold.

[0010] A flange forming ring groove 1 for forming the upper flange of the inner barrel is provided on the right end face of the side mold assembly. A flange forming ring groove 2 for the flange of the inner barrel base is provided on the left end face of the side mold assembly. The design of the upper flange of the inner barrel of the trash can facilitates putting on the trash bag, and the design of the base flange of the inner barrel of the trash can is to support the bottom of the outer barrel of the trash can, so that the combination of the inner barrel and the outer barrel is tight, coordinated and stable.

[0011] Since the outer diameters of the inner barrel base and the upper edge are both larger than the middle barrel body, in order to be able to demold, the side mold assembly is divided into two parts, including two relatively spliced side half molds; chutes and pull rod connection grooves are provided at the top of the side half molds;

[0012] The right end of the core mold assembly is connected to the left side of the upper mold assembly;

[0013] The upper mold assembly includes an upper mold base, a cylinder, and a cylinder mounting seat; a slide rail is provided at the left end of the upper mold base. The side mold assembly fits the upper mold assembly, and the slide rail is arranged in the chute. There are two cylinders, symmetrically fixed on the side wall of the upper mold base through the cylinder mounting seats, and their output shafts are connected to the pull rod connection grooves of the side half molds. During demolding, the side half molds can be pulled to slide along the slide rail, so that the side mold assembly is pulled apart and the diameter becomes larger, enabling the upper edge of the inner barrel to be demolded.

[0014] Guide rods are provided on the bottom mold assembly and the upper mold assembly. Preferably, there are four guide rods, which are respectively arranged in the guide holes at the four corners of the bottom mold assembly and the upper mold assembly.

[0015] An injection molding runner 1 (the flow channel for the molten plastic fluid) is provided in the middle of the upper mold assembly, and an injection molding runner 2 is provided in the middle of the core mold assembly. The injection molding runner 1, the injection molding runner 2, and the forming area are connected in sequence.

[0016] Preferably, the mold cavity is a frustum of a pyramid, which is convenient for demolding and mold closing.

[0017] Preferably, the upper mold assembly further includes a hot nozzle plug-in board, which is attached to the right side of the upper mold base. It is provided with a number of hot runners inside, and hot nozzle sockets are provided on both sides. The hot nozzle sockets communicate with a number of hot runners. The hot runners are connected to the injection molding runner 1.

[0018] Optionally, a hot nozzle socket 2 is provided on the side wall of the upper mold base, and the hot nozzle socket 2 is connected to the injection molding runner 1.

[0019] Preferably, an end plate is further provided on the right side of the hot nozzle plug-in board.

[0020] Preferably, a plurality of condensate flow channels are provided inside the side mold assembly, and the condensate flow channels are arranged around the cylindrical cavity, which is convenient for quickly cooling the inner barrel to form.

[0021] To shorten the stroke of the injection molding runner, the core mold assembly includes an upper core mold and a lower core mold. The upper core mold is fixed above the upper mold assembly. The upper core mold is connected to the lower core mold, and a gap is provided between the upper core mold and the lower core mold. This gap communicates with the second injection molding runner and the molding area, which can facilitate the rapid injection of molten plastic fluid into the upper section of the inner barrel and accelerate the injection molding of the inner barrel.

[0022] The beneficial effects of the present utility model are as follows:

[0023] Its structure is simple and reasonable, and the operation is stable and reliable; it can efficiently perform injection molding and demolding, and form an inner barrel with an outer diameter of the base and the upper flange both larger than the radius of the middle section of the barrel body. Description of the Drawings

[0024] Figure 1 is a schematic structural diagram of an injection mold for an inner barrel of a trash can according to the present utility model;

[0025] Figure 2 is an exploded schematic structural diagram of an injection mold for an inner barrel of a trash can according to the present utility model;

[0026] Figure 3 is a left view of an injection mold for an inner barrel of a trash can according to the present utility model;

[0027] Figure 4 is Figure 3 a cross-sectional view taken along the B-B direction in

[0028] Figure 5 is a schematic structural diagram of the trash can described in this application;

[0029] Figure 6 is a schematic structural diagram of the inner barrel of the trash can described in this application. Detailed Embodiments

[0030] The following further describes the detailed embodiments of the present utility model with reference to the drawings. It should be noted here that the description of these embodiments is for helping to understand the present utility model, but does not constitute a limitation to the present utility model. In addition, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0031] As Figure 1-6 shown, an injection mold for an inner barrel of a trash can includes a bottom mold assembly 1, an upper mold assembly 2, a side mold assembly 3, and a core mold assembly 4 (named according to the forming part of the inner barrel);

[0032] Since the mold of the present application is generally horizontally placed in the injection molding machine, the positional relationship in its usage scenario is described. Taking the bottom mold assembly 1 on the left side as an example (but not limited to this installation method).

[0033] The bottom mold assembly 1 is horizontally arranged, with an opening at its right end and a concave cavity in the middle; the bottom mold assembly 1 includes an end plate 11, a mold base 12, and a bottom mold 13; the end plate 11 is vertically arranged at the left end, and its right side is connected to the horizontally arranged mold base 12; a mold cavity is provided in the middle of the mold base 12; the mold cavity 14 includes a side mold cavity for installing the side mold assembly 3, a bottom mold cavity for installing the bottom mold 13, and a core mold cavity for installing the core mold assembly 4.

[0034] The side mold assembly 3 is arranged on the inner wall of the mold cavity 14 of the mold base 12, the bottom mold 13 is arranged at the left end of the mold cavity 14 (the bottom end when placed vertically), and the core mold assembly 4 is arranged in the middle of the mold cavity 14; the gap area between the side mold assembly 3, the bottom mold 13, the upper mold assembly 2 and the core mold assembly 4 is the forming area 5 of the inner barrel. Therefore, a cylindrical cavity is provided in the middle of the side mold assembly 3; the core mold assembly 4 is inserted into the cylindrical cavity, and the left end of the core mold assembly 4 is the bottom mold 13.

[0035] A first flange forming ring groove 31 for forming the upper flange 61 of the inner barrel 6 is provided on the right end face of the side mold assembly 3. A second flange forming ring groove 32 for the base flange 62 of the inner barrel is provided on the left end face of the side mold assembly 3. The design of the upper flange 61 of the trash can inner barrel facilitates putting on the trash bag, and the design of the base flange 62 of the trash can inner barrel is to support the bottom of the trash can outer barrel, making the combination of the inner barrel and the outer barrel tight, coordinated and stable.

[0036] Since the outer diameters of the base and the upper edge of the inner barrel are both larger than the middle barrel body, in order to be demolded, the side mold assembly 3 is divided into two parts, including two relatively spliced side half molds 30; a sliding groove 33 and a pull rod connection groove 34 are provided at the top of the side half mold 30.

[0037] The right end of the core mold assembly 4 is connected to the left side of the upper mold assembly 2;

[0038] The upper mold assembly 2 includes an upper mold base 20, a cylinder, and a cylinder mounting seat 22; a slide rail 23 is provided at the left end of the upper mold base 20, the side mold assembly 3 fits the upper mold assembly 2, and the slide rail 23 is arranged in the sliding groove 33. There are two cylinders, symmetrically fixed on the side wall of the upper mold base 20 through the cylinder mounting seat 22, and their output shafts are connected to the pull rod connection groove 34 of the side half mold 30. During demolding, the side half mold 30 can be pulled to slide along the slide rail 23, so that the side mold assembly 3 is pulled apart and the diameter becomes larger, enabling the upper edge of the inner barrel to be demolded. The cylinder is installed at the position shown as 220.

[0039] Guide rods 15 are provided on the bottom mold assembly 1 and the upper mold assembly 2. Preferably, there are four guide rods 15, which are respectively arranged in the guide holes 16 at the four corners of the bottom mold assembly 1 and the upper mold assembly 2.

[0040] In the middle of the two groups of the upper die assemblies 2, there is an injection runner one 21 (a flow channel for molten plastic fluid), and in the middle of the core die assembly 4, there is an injection runner two 41. The injection runner one 21, the injection runner two 41, and the molding area 5 are connected in sequence.

[0041] Preferably, the mold cavity 14 is a frustum of a pyramid, which is convenient for demolding and mold closing.

[0042] Preferably, the upper die assembly 2 further includes a hot nozzle plug-in board 7. The hot nozzle plug-in board 7 is attached to the right side of the upper die base 20. There are several hot runners inside it, and there are hot nozzle sockets 71 on both sides of it. The hot nozzle sockets 71 are connected to several hot runners. The hot runners are connected to the injection runner one 21.

[0043] Optionally, there is a second hot nozzle socket 24 on the side wall of the upper die base 20, and the second hot nozzle socket 24 is connected to the injection runner one 21.

[0044] Preferably, there is also an end plate 11 on the right side of the hot nozzle plug-in board 7.

[0045] Preferably, there are several condensate flow channels 35 inside the side die assembly 3. The condensate flow channels 35 are arranged around the cylindrical cavity, which is convenient for quickly cooling and forming the inner barrel 6. There are a condensate inlet hole 36 and an outlet hole on the outer wall of the side die assembly 3.

[0046] To shorten the stroke of the injection runner, the core die assembly 4 includes an upper core die 43 and a lower core die 44. The upper core die 43 is fixed on the upper die assembly. The upper core die 43 is connected to the lower core die 44, and there is a gap between the upper core die 43 and the lower core die 44. This gap is connected to the injection runner two 41 and the molding area 5, which can facilitate the rapid injection of molten plastic fluid into the upper section of the inner barrel 6 and accelerate the injection molding of the inner barrel.

[0047] The above has described the embodiments of the present invention in detail in conjunction with the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, without departing from the principle and spirit of the present invention, various changes, modifications, substitutions, and variations made to these embodiments still fall within the protection scope of the present invention.

Claims

1. An injection mold for a trash can inner barrel, characterized in that: It includes a bottom mold assembly, an upper mold assembly, a side mold assembly, and a core mold assembly; The bottom mold assembly is arranged horizontally, with an opening at the right end and a concave cavity in the middle; the bottom mold assembly includes an end plate, a mold base, and a bottom mold; the end plate is arranged vertically at the left end, and its right side is connected to the mold base arranged horizontally; a mold cavity is arranged in the middle of the mold base; the mold cavity includes a side mold cavity for installing the side mold assembly, a bottom mold cavity for installing the bottom mold, and a core mold cavity for installing the core mold assembly; The side mold assembly is arranged on the inner wall of the mold cavity of the mold base, the bottom mold is arranged at the left end of the mold cavity, and the core mold assembly is arranged in the middle of the mold cavity; the gap area between the side mold assembly, the bottom mold, the upper mold assembly and the core mold assembly is the molding area of ​​the inner barrel; Therefore, a cylindrical cavity is provided in the middle of the side mold assembly; the core mold assembly is inserted into the cylindrical cavity, and the bottom mold is provided at the left end of the core mold assembly; The right end surface of the side mold assembly is provided with a flange forming ring groove 1 for forming the flange at the upper end of the inner barrel; the left end surface of the side mold assembly is provided with a flange forming ring groove 2 for the flange of the inner barrel base.

2. The injection mold for the inner barrel of a trash can according to claim 1, characterized in that: It comprises two side half molds which are relatively assembled and arranged; the top of the side half mold is provided with a slide groove and a pull rod connecting groove; The right end of the core mold assembly is connected to the left side of the upper mold assembly; The upper die assembly includes an upper die seat, a cylinder, and a cylinder mounting seat; a slide rail is provided at the left end of the upper die seat, the side die assembly is attached to the upper die assembly, and the slide rail is provided in the slide groove; There are two cylinders, which are symmetrically fixed on the side wall of the upper mold base through cylinder mounting seats, and their output shafts are connected to the pull rod connecting grooves of the side half molds.

3. The injection mold for the inner barrel of a trash can according to claim 2, characterized in that: The bottom mold assembly and the upper mold assembly are provided with guide rods.

4. The injection mold for the inner bucket of a trash can according to claim 3, characterized in that: An injection channel 1 is provided in the middle of the upper mold assembly, and an injection channel 2 is provided in the middle of the core mold assembly. The injection channel 1, the injection channel 2 and the molding area are connected in sequence.

5. The injection mold for the inner bucket of a trash can according to claim 4, characterized in that: The mold cavity is a trapezoidal body.

6. The injection mold for the inner bucket of a trash can according to claim 5, characterized in that: The upper mold assembly also includes a hot nozzle plug-in plate, which is attached to the right side of the upper mold base. A number of hot runners are arranged inside the hot nozzle plug-in plate, and hot nozzle sockets are arranged on both sides of the hot nozzle plug-in plate. The hot runners are connected to the injection molding runner.

7. The injection mold for the inner bucket of a trash can according to claim 6, characterized in that: The side wall of the upper mold base is provided with a second hot nozzle socket, and the second hot nozzle socket is communicated with the first injection flow channel.

8. The injection mold for the inner bucket of a trash can according to claim 7, characterized in that: An end plate is also arranged on the right side of the hot nozzle plug-in board.

9. The injection mold for the inner bucket of a trash can according to any one of claims 1 to 8, characterized in that: A plurality of condensate flow channels are arranged inside the side mold assembly, and the condensate flow channels are arranged on the periphery of the cylindrical cavity.

10. The injection mold for the inner bucket of a trash can according to any one of claims 4 to 8, characterized in that: The core mold assembly comprises an upper core mold and a lower core mold, wherein the upper core mold is fixedly arranged on the upper mold assembly; the upper core mold is connected to the lower core mold, and a gap is arranged between the upper core mold and the lower core mold, and the gap is connected to the injection runner and the molding area.

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