Rectangular plastic sealing tank injection mold

Abstract

The utility model provides a rectangular plastic sealing tank injection mold, and belongs to the technical field of molds. The mold comprises a mold body, the mold body is composed of an upper mold plate, a middle mold plate, a jacking plate and a lower mold plate which are sequentially arranged from top to bottom, two upper forming grooves with rectangular sections are formed in the middle mold plate, and two forming inserts which are inserted into the upper forming grooves and have rectangular sections are fixedly connected to the lower mold plate. Cooling liquid in the mold body can be synchronously cooled from the inner side and the outer side through the inner and outer synchronous cooling structure, so that the cooling efficiency can be improved, an outer edge structure can be formed on the opening side of the sealing tank through the outer edge forming structure on the jacking plate, and a bottom support structure can be formed at the bottom of the sealing tank through the bottom support forming structure during injection molding of the sealing tank.

Description

Technical Field

[0001] The utility model belongs to the technical field of molds and relates to an injection mold for a rectangular plastic sealed can. Background Art

[0002] Plastic sealed cans are generally molded by injection molding. In the prior art, the cooling structure of the plastic sealed can mold is set in the molding insert, and the coolant in the molding cavity is cooled from the inside to the outside by the coolant, and the cooling efficiency is low.

[0003] For example, a Chinese patent discloses a thick-walled polycarbonate plastic sealed container mold [application number: 202222987887.0], which includes an upper template and a combined lower template structure for forming a molding cavity. The combined lower template structure includes an upper mold, a middle mold, and a lower mold. The upper mold is provided with an outer wall molding groove with a circular cross-section, and the outer wall molding groove passes through the upper mold in the vertical direction. The lower mold is provided with a detachable core mold. The combined lower template structure formed by the upper mold, the middle mold, and the lower mold, and the detachable core mold detachably arranged with the lower mold can reduce the cost of mold maintenance or replacement. The sealing limit assembly can upper-limit the detachable core mold and seal the bottom of the molding cavity. The setting of the tightening assembly can facilitate the installation of the detachable core mold on the lower mold and can tighten and position the detachable core mold. However, this solution does not propose further improvements to the cooling structure. Utility Model Content

[0004] The purpose of the utility model is to provide a rectangular plastic sealed can injection mold in view of the above problems.

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

[0006] A rectangular plastic sealed can injection mold includes a mold body, which is composed of an upper template, an intermediate template, a lifting plate and a lower template arranged in sequence from top to bottom. The intermediate template is provided with two upper molding grooves with rectangular cross-sections, and the lower template is fixedly connected with two molding inserts with rectangular cross-sections inserted into the upper molding grooves. Two lower molding grooves are provided on the lifting plate, and the top periphery of the lower molding grooves is provided with an outer edge molding structure connected to the upper molding grooves. The upper template is also provided with a bottom support molding structure, and the mold body is also provided with an internal and external synchronous cooling structure.

[0007] In the above-mentioned rectangular plastic sealed can injection mold, the internal and external synchronous cooling structure includes an external cooling structure arranged in the middle template and an internal cooling structure arranged in the molding insert.

[0008] In the above-mentioned rectangular plastic sealed can injection mold, the external cooling structure includes several external cooling channels that are recessed inwardly and arranged on the top of the middle template, and several external cooling channels are arranged circumferentially along the upper molding groove. The top of the middle template is also recessed inwardly and provided with an upper connecting channel connecting several external cooling channels.

[0009] In the above-mentioned rectangular plastic sealed can injection mold, the outer cooling channel is vertically arranged.

[0010] In the above-mentioned rectangular plastic sealed can injection mold, the inner cooling structure includes a plurality of inner cooling channels recessed inwardly in the molding insert, and the bottom of the molding insert is also recessed inwardly to provide a lower connecting channel connecting the plurality of inner cooling channels.

[0011] In the above-mentioned rectangular plastic sealed can injection mold, the inner cooling channel is vertically arranged.

[0012] In the above-mentioned rectangular plastic sealed can injection mold, the outer edge molding structure includes an outer edge molding groove which is inwardly recessed and arranged on the top of the lifting plate and has a rectangular ring-shaped cross section.

[0013] In the above-mentioned rectangular plastic sealed can injection mold, the bottom support molding structure includes two top inserts arranged at the bottom of the upper template and inserted into the two upper molding grooves respectively. The bottom of the top insert is against the top of the molding insert. The cross-section of the top insert is rectangular and the bottom edge of the top insert is provided with a bottom support molding groove with a rectangular ring cross-section.

[0014] In the above-mentioned rectangular plastic sealed can injection mold, the top insert is integrally formed with the upper mold plate.

[0015] In the above-mentioned rectangular plastic sealed can injection mold, the molding insert is detachably fixed to the lower mold plate by a plurality of bolts.

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

[0017] 1. The internal and external synchronous cooling structure can cool the coolant in the mold body synchronously from both the inside and outside, thereby improving the cooling efficiency. The outer edge forming structure on the lifting plate can form an outer edge structure on the opening side of the sealed tank, and the bottom support forming structure can form a bottom support structure at the bottom of the sealed tank during injection molding of the sealed tank.

[0018] 2. The external cooling structure and the internal cooling structure can cool the injection molding liquid in the molding cavity from both the inside and outside of the molding cavity at the same time. The coolant can be injected into several external cooling channels through the upper connecting flow channel, and the injection molding liquid in the molding cavity can be cooled from the outside to the inside through the external cooling flow channel. The coolant can be injected into several internal cooling flow channels through the lower connecting flow channel, and the injection molding liquid in the molding cavity can be cooled from the inside to the outside through the internal cooling flow channel.

[0019] Other advantages, objectives and features of the present invention will be reflected 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 schematic diagram of the overall structure of the utility model;

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

[0022] Figure 3 It is a structural diagram of the intermediate template;

[0023] Figure 4 It is a structural diagram of the jacking plate;

[0024] Figure 5 It is a structural diagram of the bottom support molding structure.

[0025] In the figure, the mold body 1, the upper template 2, the middle template 3, the lifting plate 4, the lower template 5, the upper molding groove 6, the molding insert 7, the lower molding groove 8, the outer edge molding structure 9, the bottom support molding structure 10, the external cooling structure 11, the internal cooling structure 12, the external cooling channel 13, the upper connecting channel 14, the internal cooling channel 15, the lower connecting channel 16, the outer edge molding groove 17, the top insert 18, and the bottom support molding groove 19. DETAILED DESCRIPTION

[0026] like Figure 1-Figure 5 As shown, a rectangular plastic sealed can injection mold includes a mold body 1, and the mold body 1 is composed of an upper template 2, an intermediate template 3, a lifting plate 4 and a lower template 5 arranged in sequence from top to bottom. The intermediate template 3 is provided with two upper molding grooves 6 with rectangular cross-sections, and the lower template 5 is fixedly connected with two molding inserts 7 with rectangular cross-sections inserted into the upper molding grooves 6. The lifting plate 4 is provided with two lower molding grooves 8 and the top periphery of the lower molding groove 8 is provided with an outer edge molding structure 9 connected to the upper molding groove 6. The upper template 2 is also provided with a bottom support molding structure 10, and the mold body 1 is also provided with an internal and external synchronous cooling structure.

[0027] In the present invention, the injection molding liquid in the mold body can be cooled synchronously from both the inside and outside sides through the internal and external synchronous cooling structure, thereby improving the cooling efficiency. The outer edge molding structure 9 on the lifting plate 4 can form an outer edge structure on the opening side of the sealed tank, and the bottom support molding structure 10 can form a bottom support structure at the bottom of the sealed tank when the sealed tank is injected.

[0028] Specifically, the internal and external synchronous cooling structure includes an external cooling structure 11 provided in the middle template 3 and an internal cooling structure 12 provided in the molding insert 7. The external cooling structure 11 and the internal cooling structure can cool the injection molding liquid in the molding cavity from both the inside and outside of the molding cavity at the same time.

[0029] Specifically, the external cooling structure 11 includes several external cooling channels 13 recessed inwardly at the top of the intermediate mold plate 3. These channels are arranged circumferentially along the upper molding groove 6. Furthermore, an upper connecting channel 14 is recessed inwardly at the top of the intermediate mold plate 3, connecting these channels. The external cooling channels 13 are arranged vertically. Coolant can be injected into the external cooling channels through the upper connecting channel, cooling the injection molding liquid in the molding cavity from the outside inward.

[0030] Specifically, the internal cooling structure 12 includes a plurality of internal cooling channels 15 recessed inwardly within the molding insert 7. A lower connecting channel 16 is also recessed inwardly at the bottom of the molding insert 7, connecting the plurality of internal cooling channels 15. The internal cooling channels 15 are vertically arranged. Coolant can be injected into the plurality of internal cooling channels through the lower connecting channel, thereby cooling the injection molding liquid in the molding cavity from the inside out.

[0031] Specifically, the outer edge forming structure 9 includes an outer edge forming groove 17 that is recessed inwardly and arranged on the top of the lifting plate 4 and has a rectangular ring-shaped cross section. The outer edge forming groove on the lifting plate 4 can form a rectangular ring-shaped outer edge on the opening side of the sealed can, and the lifting plate can be moved upward to fix the sealed can as a whole through the outer edge.

[0032] Specifically, the bottom support forming structure 10 includes two top inserts 18 disposed at the bottom of the upper mold plate 2 and inserted into the two upper forming grooves 6, respectively. The bottom of the top insert 18 abuts against the top of the forming insert 7. The top insert 18 has a rectangular cross-section, and the bottom edge of the top insert 18 is provided with a bottom support forming groove 19 with a rectangular cross-section. The bottom support forming groove 19 at the bottom of the top insert can form an outwardly protruding rectangular ring bottom support at the bottom of the sealed can.

[0033] Preferably, the top insert 18 and the upper template 2 are integrally formed to facilitate casting.

[0034] Preferably, the forming insert 7 is detachably fixed to the lower template 5 by a plurality of bolts, which can be easily disassembled.

[0035] The working principle of the utility model is that the injection molding liquid in the mold body can be cooled synchronously from both the inside and the outside through the internal and external synchronous cooling structure, thereby improving the cooling efficiency. The outer edge forming structure 9 on the lifting plate 4 can form the outer edge structure on the opening side of the sealed tank, and the bottom support forming structure 10 can form the bottom support structure at the bottom of the sealed tank during the injection molding of the sealed tank.

[0036] The external cooling structure 11 and the internal cooling structure can cool the injection molding liquid in the molding cavity from both the inside and outside of the molding cavity at the same time. The cooling liquid can be injected into the plurality of external cooling channels through the upper connecting channel, and the injection molding liquid in the molding cavity can be cooled from the outside to the inside through the external cooling channels. The cooling liquid can be injected into the plurality of internal cooling channels through the lower connecting channel, and the injection molding liquid in the molding cavity can be cooled from the inside to the outside through the internal cooling channels.

[0037] The outer edge forming groove on the lifting plate 4 can form a rectangular ring-shaped outer edge on the opening side of the sealed tank. The lifting plate can move upward to fix the sealed tank as a whole through the outer edge, and the bottom support forming groove 19 at the bottom of the top insert can form a rectangular ring-shaped bottom support protruding outward at the bottom of the sealed tank.

[0038] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

[0039] Although this article uses the mold body 1, upper template 2, middle template 3, lifting plate 4, lower template 5, upper molding groove 6, molding insert 7, lower molding groove 8, outer edge molding structure 9, bottom support molding structure 10, external cooling structure 11, internal cooling structure 12, external cooling channel 13, upper connecting channel 14, internal cooling channel 15, lower connecting channel 16, outer edge molding groove 17, top insert 18, bottom support molding groove 19, etc. more frequently, these terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. A rectangular plastic sealed can injection mold, comprising a mold body (1), wherein the mold body (1) is composed of an upper mold plate (2), a middle mold plate (3), a lifting plate (4) and a lower mold plate (5) arranged in sequence from top to bottom, characterized in that: The intermediate template (3) is provided with two upper molding grooves (6) with rectangular cross sections, the lower template (5) is fixedly connected with two molding inserts (7) with rectangular cross sections and inserted into the upper molding grooves (6), the lifting plate (4) is provided with two lower molding grooves (8), and the top periphery of the lower molding grooves (8) is provided with an outer edge molding structure (9) connected to the upper molding grooves (6), the upper template (2) is also provided with a bottom support molding structure (10), and the mold body (1) is also provided with an internal and external synchronous cooling structure.

2. The rectangular plastic sealed can injection mold according to claim 1, characterized in that: The internal and external synchronous cooling structure comprises an external cooling structure (11) arranged in the middle template (3) and an internal cooling structure (12) arranged in the forming insert (7).

3. The rectangular plastic sealed can injection mold according to claim 2, characterized in that: The external cooling structure (11) includes a plurality of external cooling channels (13) recessed inwardly and arranged on the top of the intermediate template (3), and the plurality of external cooling channels (13) are arranged circumferentially along the upper forming groove (6). The top of the intermediate template (3) is also recessed inwardly and provided with an upper connecting channel (14) connecting the plurality of external cooling channels (13).

4. The rectangular plastic sealed can injection mold according to claim 3, characterized in that: The outer cooling channel (13) is arranged vertically.

5. The rectangular plastic sealed can injection mold according to claim 4, characterized in that: The inner cooling structure (12) includes a plurality of inner cooling channels (15) recessed inwardly and arranged in the molding insert (7), and the bottom of the molding insert (7) is also recessed inwardly and provided with a lower connecting channel (16) connecting the plurality of inner cooling channels (15).

6. The rectangular plastic sealed can injection mold according to claim 5, characterized in that: The inner cooling channel (15) is arranged vertically.

7. The rectangular plastic sealed can injection mold according to claim 1, characterized in that: The outer edge forming structure (9) comprises an outer edge forming groove (17) which is inwardly recessed and arranged on the top of the lifting plate (4) and has a rectangular ring-shaped cross section.

8. The rectangular plastic sealed can injection mold according to claim 1, characterized in that: The bottom support forming structure (10) includes two top inserts (18) arranged at the bottom of the upper template (2) and inserted into the two upper forming grooves (6) respectively. The bottom of the top insert (18) is against the top of the forming insert (7). The cross section of the top insert (18) is rectangular and the bottom edge of the top insert (18) is provided with a bottom support forming groove (19) with a rectangular ring cross section.

9. The rectangular plastic sealed can injection mold according to claim 8, characterized in that: The top insert (18) is integrally formed with the upper template (2).

10. The rectangular plastic sealed can injection mold according to claim 1, characterized in that: The forming insert (7) is detachably fixed to the lower template (5) by a plurality of bolts.

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