Injection mold for wall-hanging stove key

Abstract

The utility model relates to an injection mold for a wall-hanging stove key, which comprises an upper mold base, a lower mold base, a shaping rod, a mold core, a demolding plate and an ejector rod, and mainly aims to improve the friction force between a key plastic part and the lower mold base through the structure of a shaping groove after the injection molding of the key plastic part is finished. The key plastic part is prevented from being clamped into the upper mold base when the mold is split, then the ejector rod is controlled through the demolding plate to eject out the key plastic part, demolding is completed in cooperation with the demolding air pump, the overall structural design is reasonable, the design defects of the mold cavity structure are reduced, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of injection molds, and in particular to an injection mold for a wall-hung boiler button. Background Technology

[0002] Injection molds typically consist of two sets of mating upper and lower mold bases, and an ejector structure located within the lower mold base. The two mold bases together form a cavity. Molten plastic particles are injected into the cavity under high pressure. After cooling and solidification, the upper mold base is opened to obtain the molded injection part. The injection part is then demolded through the ejector structure of the lower mold base. However, when designing molds for small injection parts, most of the cavity needs to be located within the upper mold base. This causes some injection parts to become stuck in the upper mold base due to friction during demolding. Since the upper mold base lacks an ejector structure, the injection parts inside the upper mold base cannot be demolded. This design flaw seriously affects production progress. Utility Model Content

[0003] To overcome the shortcomings of the prior art, the technical solution adopted by this utility model is as follows: an injection mold for a wall-hung boiler button, comprising an upper mold base, a lower mold base, a shaping rod, a mold core, a ejector plate, and an ejector rod. The upper mold base is provided with an injection port and an upper mold cavity. The upper mold base is connected to the shaping rod at both ends of the upper mold cavity. The lower mold base is provided with a sprue corresponding to the injection port and an installation cavity connected to the sprue. The installation cavity is fitted with a mold core corresponding to the upper mold cavity. The mold core is provided with side cavities at both ends that, together with the shaping rod, form a hook structure for the button. The lower mold base is slidably connected to the ejector plate. The ejector plate is fixedly connected to an ejector rod extending to the mold core. The ejector rod is provided with a shaping groove at one end near the upper mold cavity for forming a contact structure for the button.

[0004] Using the above technical solution, after the button plastic part is injection molded, the structure of the shaping groove increases the friction between the button plastic part and the lower mold base, preventing the button plastic part from getting stuck in the upper mold base when the mold is separated. Then, the ejector rod of the ejector plate is used to eject the button plastic part, and the ejector air pump is used to complete the demolding. The overall structure design is reasonable, reduces the design defects of the mold cavity structure, and improves production efficiency.

[0005] The present invention is further configured such that the push rod has a stepped surface and a frustum portion, the stepped surface is coplanar with the upper surface of the mold core, the shaping groove is located at the center of the frustum portion, and the upper mold cavity has a cylindrical cavity coaxially distributed with the frustum portion.

[0006] Furthermore, the shaping groove is a cross groove extending into the interior of the top rod.

[0007] By adopting the above technical solution, the friction between the button plastic part and the push rod is increased by the cross groove, without affecting the height and structural strength of the button's contact structure.

[0008] The present invention is further configured such that the mold core is provided with a sliding groove adapted to the ejector pin, and a limiting surface is provided on one side of the sliding groove that is perpendicular to the cross groove.

[0009] By adopting the above technical solution, the orientation of the push rods is the same through the limiting surface, so that the cross contact structure of each button is the same.

[0010] The present invention is further configured such that the two ends of the mounting cavity are provided with rectangular grooves corresponding to the shaping rod, a part of the shaping rod abuts against the rectangular groove, and the other part extends into the side cavity.

[0011] Furthermore, the upper mold cavity has a first demolding surface at both ends, and the shaping rod has a second demolding surface that is coplanar with the first demolding surface.

[0012] By adopting the above technical solution, the parting surface of the hook structure is set in the lower mold base by the shaping rod, which reduces the amount of machining of the upper mold cavity of the upper mold base and the material used for the mold core, making the mold design reasonable and the processing cost low.

[0013] The present invention is further configured such that the sprue is I-shaped and has four sets of branch channels, and the lower mold base has symmetrically distributed mold cores at each set of branch channels.

[0014] Using the above technical solution, plastic particles enter the mold through the injection port and are diverted into the mold cavity through the sprue, enabling the injection mold to produce eight parts at a time, thus improving the production efficiency of buttons.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] After the button plastic part is injection molded, the structure of the shaping groove increases the friction between the button plastic part and the lower mold base, preventing the button plastic part from getting stuck in the upper mold base when the mold is separated. Then, the ejector rod of the ejector plate is used to eject the button plastic part, and the demolding is completed with the help of the demolding air pump. The overall structure design is reasonable, reduces the design defects of the mold cavity structure, and improves production efficiency.

[0017] The embodiments of this utility model will be further described below with reference to the accompanying drawings. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of the present invention;

[0019] Figure 2 This is a front view of the upper mold base of this utility model;

[0020] Figure 3 This is a front view of the lower mold base of this utility model;

[0021] Figure 4 This is a partial enlarged view of the push rod of this utility model;

[0022] Figure 5 For the present utility model Figure 1 A magnified view of the central A-direction view;

[0023] Wherein: 1-Upper mold base, 2-Lower mold base, 3-Shaping rod, 4-Mold core, 5-Ejector plate, 6-Ejector pin, 11-Injection port, 12-Upper mold cavity, 13-Cylindrical cavity, 14-First ejector surface, 21-Gateway, 22-Mounting cavity, 23-Rectangular groove, 24-Branch runner, 31-Second ejector surface, 41-Side cavity, 42-Slide groove, 43-Limiting surface, 61-Shaping groove, 62-Step surface, 63-Frustum section; Detailed Implementation

[0024] like Figure 1-3 As shown, this embodiment provides an injection mold for a button on a wall-hung boiler, including an upper mold base 1, a lower mold base 2, a shaping rod 3, a mold core 4, a ejector plate 5, and an ejector rod 6. The upper mold base 1 is provided with an injection port 11 and an upper mold cavity 12. The upper mold base 1 is connected to the shaping rod 3 at both ends of the upper mold cavity 12. The lower mold base 2 is provided with a sprue 21 corresponding to the injection port 11 and an installation cavity 22 connected to the sprue 21. The installation cavity 22 is fitted with the mold core 4 corresponding to the upper mold cavity 12, and both ends of the mold core 4 are provided with side cavities 41 that combine with the shaping rod 3 to form a hook structure for the button. The lower mold base 2 is slidably connected to the ejector plate 5, and the ejector plate 5 is fixedly connected to the ejector rod 6 extending to the mold core 4. The end of the ejector rod 6 near the upper mold cavity 12 is provided with a shaping groove 61 for forming a contact structure for the button.

[0025] Combination Figure 4 As shown, in this embodiment, the ejector rod 6 is provided with a stepped surface 62 and a frustum 63. The stepped surface 62 is coplanar with the upper surface of the mold core 4. The shaping groove 61 is located at the center of the frustum 63. The upper mold cavity 12 is provided with a cylindrical cavity 13 coaxially distributed with the frustum 63. The shaping groove 61 is a cross groove extending into the interior of the ejector rod 6. The cross groove increases the friction between the button plastic part and the ejector rod 6 without affecting the height and structural strength of the button's contact structure.

[0026] Combination Figure 5 As shown, in this embodiment, the mold core 4 is provided with a sliding groove 42 that is adapted to the ejector rod 6. One side of the sliding groove 42 is provided with a limiting surface 43 that is perpendicular to the cross groove. The two ends of the mounting cavity 22 are provided with rectangular grooves 23 corresponding to the shaping rod 3. A part of the shaping rod 3 abuts against the rectangular groove 23, and the other part extends to the side cavity 41. The two ends of the upper mold cavity 12 are provided with a first demolding surface 14, and the shaping rod 3 is provided with a second demolding surface 31 that is coplanar with the first demolding surface 14.

[0027] like Figure 3As shown, in this embodiment, the sprue 21 is I-shaped and has four sets of branch channels 24. The lower mold base 2 is provided with symmetrically distributed mold cores 4 at each set of branch channels 24. Plastic particles enter the mold through the injection port 11 and are diverted to the mold cavity through the sprue 21, so that the injection mold produces eight parts at a time.

[0028] The working principle of this utility model is as follows: when the upper mold base 1 and the lower mold base 2 are closed, the upper mold cavity 12 and the mold core 4 combine to form the main structure of the button, the cylindrical cavity 13 forms the touch structure of the button, the cross groove forms the contact structure of the button, and the shaping rod 3 and the side cavity 41 form the hook structure of the button. After the button plastic part is injection molded, the friction between the button plastic part in the cross groove and the lower mold base 2 prevents the button plastic part from getting stuck in the upper mold base 1 when the mold is separated. After the upper mold base 1 and the lower mold base 2 are separated, the ejector plate 5 controls the ejector rod 6 to eject the button plastic part, and then the ejector air pump completes the demolding. The overall structure design is reasonable.

[0029] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An injection mold for a button on a wall-hung boiler, characterized in that, The mold includes an upper mold base (1), a lower mold base (2), a shaping rod (3), a mold core (4), a demolding plate (5), and an ejector pin (6). The upper mold base (1) is provided with an injection port (11) and an upper mold cavity (12). The upper mold base (1) is connected to the shaping rod (3) at both ends of the upper mold cavity (12). The lower mold base (2) is provided with a sprue (21) corresponding to the injection port (11) and an installation cavity (22) connected to the sprue (21). 22) A mold core (4) corresponding to the upper mold cavity (12) is snapped in place, and the two ends of the mold core (4) are provided with side cavities (41) that combine with the shaping rod (3) to form a button hook structure. The lower mold base (2) is slidably connected with a stripping plate (5), and the stripping plate (5) is fixedly connected with a push rod (6) extending to the mold core (4), and the end of the push rod (6) near the upper mold cavity (12) is provided with a shaping groove (61) for forming a contact structure of the button.

2. The injection mold for a wall-hung boiler button according to claim 1, characterized in that: The push rod (6) has a stepped surface (62) and a frustum (63). The stepped surface (62) is coplanar with the upper surface of the mold core (4). The shaping groove (61) is located at the center of the frustum (63). The upper mold cavity (12) has a cylindrical cavity (13) coaxially distributed with the frustum (63).

3. The injection mold for a wall-hung boiler button according to claim 2, characterized in that: The shaping groove (61) is a cross groove that extends into the top rod (6).

4. The injection mold for a wall-hung boiler button according to claim 3, characterized in that: The mold core (4) is provided with a slide groove (42) that is adapted to the push rod (6), and a limiting surface (43) is provided on one side of the slide groove (42) that is perpendicular to the cross groove.

5. The injection mold for a wall-hung boiler button according to claim 1, characterized in that: The mounting cavity (22) has rectangular grooves (23) at both ends corresponding to the shaping rod (3). A part of the shaping rod (3) abuts against the rectangular groove (23), and the other part extends to the side cavity (41).

6. The injection mold for a wall-hung boiler button according to claim 5, characterized in that: The upper mold cavity (12) has a first demolding surface (14) at both ends, and the shaping rod (3) has a second demolding surface (31) that is coplanar with the first demolding surface (14).

7. The injection mold for a wall-hung boiler button according to claim 1, characterized in that: The sprue (21) is I-shaped and has four sets of branch channels (24). The lower mold base (2) has symmetrically distributed mold cores (4) at each set of branch channels (24).

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