Multi-point needle valve type pouring mechanism of plastic storage box injection mold

Abstract

The utility model belongs to the technical field of molds, and relates to a multi-point needle valve type pouring mechanism of a plastic storage box injection mold. The injection mold comprises an upper forming mold plate, and an injection molding main plate is arranged above the upper forming mold plate. Molten materials are injected into the cavity in a multi-point needle valve mode through the injection molding main plate and the multi-point needle valve type pouring structure, the injection molding area is large, the injection molding speed is high, the splicing type embedded molding ejection assembly is used for synchronously injecting a main body structure of a plastic part, mold opening is conducted after injection molding is completed, and the injection molding efficiency is improved. The middle ejection part and the splicing type embedded forming ejection assembly are moved downwards, the formed plastic part is demolded from top to bottom in an upper demolding mode, on one hand, large-area ejection demolding can be carried out through the splicing type embedded forming ejection assembly, and on the other hand, large-area ejection demolding can be carried out through the splicing type embedded forming ejection assembly; and on the other hand, the position not making contact with the splicing type embedded forming ejection assembly can be ejected out through the middle ejection piece, demolding dead angles are avoided, and demolding is smoother.

Description

Technical Field

[0001] The utility model belongs to the technical field of molds and relates to a multi-point needle valve type pouring mechanism of an injection mold for a plastic storage box. Background Art

[0002] An injection mold is a tool for producing plastic products; it is also a tool that gives plastic products a complete structure and precise dimensions. Injection molding is a processing method used in the mass production of certain parts with complex shapes. Specifically, it refers to the high-pressure injection of heated and melted plastic into the mold cavity by an injection molding machine, and after cooling and solidification, a molded product is obtained. Plastic storage boxes are injection molded using injection molds. During the injection molding process, existing plastic storage box molds generally adopt an ejection structure from bottom to top, requiring a large number of ejector rods to eject the plastic parts from the mold. Once the number of ejector rods increases, the precision requirements for the mold become more stringent, and the complexity of the mold also increases. At the same time, demolding dead angles are prone to occur, resulting in uneven demolding. Therefore, there is an urgent need to design a multi-point needle valve type pouring mechanism for a plastic storage box injection mold that can overcome the above defects.

[0003] In order to overcome the shortcomings of the existing technology, people have proposed various solutions through continuous exploration. For example, a Chinese patent discloses a car storage box production mold [application number: 202120616745.6], which includes a base, and the four corners of the top of the base are fixedly connected to sliding rods. The other ends of the four sliding rods are commonly fixedly connected to an upper mold. A lower mold is provided at the bottom of the upper mold, and an injection cavity is provided between the lower mold and the upper mold. An inner cooling cavity is provided inside the upper mold, an outer cooling cavity is provided inside the lower mold, and a second injection tube is provided on the top of the upper mold. Summary of the Invention

[0004] The purpose of the utility model is to solve the above problems and provide a multi-point needle valve type pouring mechanism for an injection mold of a plastic storage box.

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

[0006] A multi-point needle valve type pouring mechanism for an injection mold for a plastic storage box includes a molding upper template, an injection molding main board is provided above the molding upper template, an upper ejection sliding plate is provided between the injection molding main board and the molding upper template, a multi-point needle valve type pouring structure is provided between the upper ejection sliding plate and the injection molding main board, a middle ejector piece extending into the molding upper template is provided at the bottom of the upper ejection sliding plate, a spliced ​​inline molding ejector assembly is provided in the molding upper template, and the spliced ​​inline molding ejector assembly and the middle ejector piece are arranged alternately.

[0007] In the multi-point needle valve type pouring mechanism of the above-mentioned plastic storage box injection mold, the multi-point needle valve type pouring structure includes an injection diverter plate arranged between the upper ejection sliding plate and the injection main board, and a plurality of needle valve pouring pipes are provided at the bottom of the injection diverter plate.

[0008] In the multi-point needle valve type pouring mechanism of the above-mentioned plastic storage box injection mold, the spliced ​​embedded molding ejection component includes a central embedded part and an edge embedded part arranged in the molding upper template, and the central embedded part and the edge embedded part are respectively staggered with the central ejection part.

[0009] In the multi-point needle valve type pouring mechanism of the above-mentioned plastic storage box injection mold, the central embedded component includes a central embedded molding plate and two side embedded molding plates, and the central embedded molding plate and the side embedded molding plates are slidably matched.

[0010] In the multi-point needle valve type pouring mechanism of the above-mentioned plastic storage box injection mold, the central embedded molding plate is provided with a plurality of first injection holes and a middle rib molding part, and the side embedded molding plates are provided with a plurality of second injection holes and middle side rib molding parts.

[0011] In the multi-point needle valve pouring mechanism of the above-mentioned plastic storage box injection mold, the upper molding template has a central cavity, the central embedded molding plate and the side embedded molding plates are located in the central cavity, and the central embedded molding plate is located between the two side embedded molding plates.

[0012] In the multi-point needle valve type pouring mechanism of the above-mentioned plastic storage box injection mold, the edge inlay includes several side edge inlay molding plates and end edge inlay molding plates, and the side edge inlay molding plates and end edge inlay molding plates have edge rib molding parts.

[0013] In the multi-point needle valve type pouring mechanism of the above-mentioned plastic storage box injection mold, the upper molding plate has an edge cavity, and the side edge embedded molding plates and the end edge embedded molding plates are both located in the edge cavity.

[0014] In the multi-point needle valve type pouring mechanism of the above-mentioned plastic storage box injection mold, the middle ejector includes a straight ejector plate and an inclined ejector plate arranged on the upper ejector sliding plate, and the straight ejector plate and the inclined ejector plate are respectively staggered with the side edge embedded molding plates.

[0015] In the multi-point needle valve type pouring mechanism of the above-mentioned plastic storage box injection mold, the straight top plate and the inclined top plate are slidably matched with the molding upper template.

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

[0017] 1. During the injection molding process, the utility model cooperates with the upper and lower molding templates, and the molten material is injected into the mold cavity in the form of a multi-point needle valve through the injection main board and the multi-point needle valve feeding structure. The injection area is large and the injection rate is fast. The spliced ​​embedded molding ejector assembly is used to synchronously inject the main structure of the plastic part. After the injection is completed, the mold is opened, and the middle ejector and the spliced ​​embedded molding ejector assembly are moved downward. The molded plastic part is demolded from top to bottom in the form of upper demolding. On the one hand, the spliced ​​embedded molding ejector assembly can be used for large-area ejection and demolding. On the other hand, the middle ejector can be used to eject the position that is not in contact with the spliced ​​embedded molding ejector assembly, avoiding the occurrence of demolding dead angles and making demolding smoother.

[0018] 2. In the injection molding process of the present invention, the side edge embedded molding plate and the end edge embedded molding plate are used to mold the side edge structure and end edge structure of the plastic part, and the edge rib molding part is used to mold the edge rib structure of the plastic part.

[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 structural diagram of the present utility model.

[0021] Figure 2 It is a structural diagram of a multi-point needle valve pouring structure.

[0022] Figure 3 It is a structural diagram of the utility model in another direction.

[0023] Figure 4 It is a partial structural diagram of the utility model.

[0024] Figure 5 It is a structural diagram of the middle ejector.

[0025] In the figure: molding upper template 1, injection molding main board 2, upper ejection sliding plate 3, multi-point needle valve type pouring structure 4, middle ejector 5, spliced ​​embedded molding ejector assembly 6, injection molding diverter plate 7, needle valve pouring pipe 8, middle embedded part 9, edge embedded part 10, central embedded molding plate 11, side embedded molding plate 12, first injection molding hole 13, middle rib molding part 14, second injection molding hole 144, middle side rib molding part 15, middle cavity 16, side edge embedded molding plate 17, end edge embedded molding plate 18, edge rib molding part 19, edge cavity 20, straight top plate 21, inclined top plate 22. DETAILED DESCRIPTION

[0026] The present invention will be further described below with reference to the accompanying drawings.

[0027] like Figure 1-5 As shown, a multi-point needle valve type pouring mechanism of a plastic storage box injection mold includes a molding upper template 1, an injection molding main board 2 is provided above the molding upper template 1, an upper ejection sliding plate 3 is provided between the injection molding main board 2 and the molding upper template 1, a multi-point needle valve type pouring structure 4 is provided between the upper ejection sliding plate 3 and the injection molding main board 2, a middle ejector 5 extending into the molding upper template 1 is provided at the bottom of the upper ejection sliding plate 3, a spliced ​​in-line molding ejector assembly 6 is provided in the molding upper template 1, and the spliced ​​in-line molding ejector assembly 6 and the middle ejector 5 are staggered.

[0028] In this embodiment, during the injection molding process, the upper molding template 1 cooperates with the lower molding template, and the molten material is injected into the mold cavity in the form of a multi-point needle valve through the injection molding main board 2 and the multi-point needle valve feeding structure 4. The injection area is large and the injection rate is fast. The spliced ​​embedded molding ejector assembly 6 is used to synchronously inject the main structure of the molded part. After the injection molding is completed, the mold is opened, and the middle ejector 5 and the spliced ​​embedded molding ejector assembly 6 are moved downward. The molded plastic part is demolded from top to bottom in the form of upper demolding. On the one hand, the spliced ​​embedded molding ejector assembly 6 can be used for large-area ejection and demolding. On the other hand, the middle ejector 5 can be used to eject the position that is not in contact with the spliced ​​embedded molding ejector assembly 6, avoiding the occurrence of demolding dead angles and making demolding smoother.

[0029] Combine Figure 1-5 As shown, the multi-point needle valve type pouring structure 4 includes an injection molding diverter plate 7 arranged between the upper ejection sliding plate 3 and the injection molding main board 2, and a plurality of needle valve pouring pipes 8 are provided at the bottom of the injection molding diverter plate 7.

[0030] Specifically, during the injection molding process, the upper molding template 1 cooperates with the lower molding template, and the molten material is injected into the mold cavity in the form of a multi-point needle valve through the injection molding main board 2, the injection molding diverter plate 7 and the needle valve inlet pipe 8, with a large injection area and a fast injection rate.

[0031] Combine Figure 3 、 Figure 5 As shown, the spliced ​​inline molding ejection assembly 6 includes a central inline component 9 and an edge inline component 10 arranged in the molding upper template 1, and the central inline component 9 and the edge inline component 10 are respectively staggered with the central ejection component 5.

[0032] In this embodiment, during the injection molding process, the central insert 9 and the edge insert 10 are used to form the central structure and edge structure of the plastic part. After the injection molding is completed, the molded plastic part can be ejected and demolded over a large area by moving the central insert 9 and the edge insert 10.

[0033] The central embedded component 9 includes a central embedded molding plate 11 and two side embedded molding plates 12 , and the central embedded molding plate 11 and the side embedded molding plates 12 are slidably matched.

[0034] In this embodiment, during the injection molding process, the central embedded molding plate 11 and the side embedded molding plates 12 are used to simultaneously mold the central region structure of the plastic part.

[0035] Combine Figure 3 As shown, the central embedded molding plate 11 is provided with a plurality of first injection holes 13 and a middle rib molding portion 14 , and the side embedded molding plates 12 are provided with a plurality of second injection holes 144 and a middle side rib molding portion 15 .

[0036] In this embodiment, during injection molding, the molten material is injected into the mold cavity through the first injection hole 13 and the second injection hole 144, and the middle rib molding part 14 and the middle side rib molding part 15 can simultaneously mold the middle and middle side ribs of the plastic part.

[0037] The upper molding template 1 has a central cavity 16 therein, the central embedded molding plate 11 and the side embedded molding plates 12 are located in the central cavity 16 , and the central embedded molding plate 11 is located between the two side embedded molding plates 12 .

[0038] In this embodiment, the middle cavity 16 is used to place the central embedded molding plate 11 and the side embedded molding plates 12 to achieve an embedded structure and reduce the thickness of the mold.

[0039] The edge inlay 10 includes a plurality of side edge inlay molding plates 17 and end edge inlay molding plates 18 , each of which has an edge rib molding portion 19 therein.

[0040] In this embodiment, during the injection molding process, the side edge embedded molding plate 17 and the end edge embedded molding plate 18 are used to form the side edge structure and end edge structure of the plastic part, and the edge rib molding part 19 is used to form the edge rib structure of the plastic part.

[0041] Combine Figure 3-4 As shown, the upper molding template 1 has an edge cavity 20 therein, and the side edge embedded molding plate 17 and the end edge embedded molding plate 18 are both located in the edge cavity 20 .

[0042] In this embodiment, the edge cavity 20 is used to place the side edge embedded molding plate 17 and the end edge embedded molding plate 18 to achieve an embedded structure and reduce the thickness of the mold.

[0043] Combine Figure 3 、 Figure 5As shown, the middle ejector 5 includes a straight ejector plate 21 and an inclined ejector plate 22 arranged on the upper ejector sliding plate 3, and the straight ejector plate 21 and the inclined ejector plate 22 are respectively staggered with the side edge embedded forming plate 17, and the straight ejector plate 21 and the inclined ejector plate 22 are slidably matched with the forming upper template 1.

[0044] In this embodiment, after the injection molding is completed, the position that is not in contact with the spliced ​​embedded molding ejection assembly 6 can be ejected through the straight ejector plate 21 and the inclined ejector plate 22, thereby avoiding the occurrence of demoulding dead angles and making demoulding smoother.

[0045] The working principle of this utility model is:

[0046] During the injection molding process, the upper molding template 1 cooperates with the lower molding template, and the molten material is injected in the form of a multi-point needle valve through the injection molding main board 2, the injection molding diverter plate 7 and the needle valve inlet pipe 8, and then injected into the mold cavity through the first injection hole 13 and the second injection hole 144. The injection area is large and the injection rate is fast. The central embedded molding plate 11 and the side embedded molding plate 12 are used to synchronously mold the central area structure of the plastic part. The central rib molding part 14 and the central side rib molding part 15 can synchronously mold the central and central side ribs of the plastic part. The side edge embedded molding plate 17 and the end edge embedded molding plate 18 are used to mold the side edge structure and end edge structure of the plastic part. The edge rib molding part 19 is used to mold The edge rib structure of the plastic part, the middle cavity 16 is used to place the central embedded molding plate 11 and the side embedded molding plate 12, to realize the embedded structure and reduce the thickness of the mold, the edge cavity 20 is used to place the side edge embedded molding plate 17 and the end edge embedded molding plate 18, to realize the embedded structure and reduce the thickness of the mold. After the injection molding is completed, the position that is not in contact with the spliced ​​embedded molding ejection component 6 can be ejected through the straight top plate 21 and the inclined top plate 22 to avoid the occurrence of demolding dead angles and make demolding smoother. The middle embedded part 9 and the edge embedded part 10 are moved downward, and the molded plastic part is demolded from top to bottom in the form of upper demolding, which can be ejected over a large area.

[0047] 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 with similar methods, without departing from the spirit of the present invention.

[0048] Although this document frequently uses terms such as molding upper template 1, injection molding main plate 2, upper ejection sliding plate 3, multi-point needle valve type pouring structure 4, middle ejector 5, spliced ​​embedded molding ejector assembly 6, injection molding manifold 7, needle valve pouring pipe 8, middle insert 9, edge insert 10, center embedded molding plate 11, side embedded molding plate 12, first injection molding hole 13, center rib molding part 14, second injection molding hole 144, center side rib molding part 15, center cavity 16, side edge embedded molding plate 17, end edge embedded molding plate 18, edge rib molding part 19, edge cavity 20, straight top plate 21, and inclined top plate 22, the possibility of using other terms is not excluded. The use of these terms is only for the purpose of more conveniently describing and explaining the essence of the present invention. Interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. A multi-point needle valve type pouring mechanism for a plastic storage box injection mold, comprising a molding upper mold plate (1), characterized in that: An injection molding main board (2) is provided above the molding upper template (1), an upper ejection sliding plate (3) is provided between the injection molding main board (2) and the molding upper template (1), a multi-point needle valve type pouring structure (4) is provided between the upper ejection sliding plate (3) and the injection molding main board (2), a middle ejection piece (5) extending into the molding upper template (1) is provided at the bottom of the upper ejection sliding plate (3), a spliced ​​embedded molding ejection assembly (6) is provided in the molding upper template (1), and the spliced ​​embedded molding ejection assembly (6) and the middle ejection piece (5) are staggered.

2. The multi-point needle valve type pouring mechanism of the plastic storage box injection mold according to claim 1, characterized in that: The multi-point needle valve type pouring structure (4) comprises an injection molding diverter plate (7) arranged between an upper ejection sliding plate (3) and an injection molding main plate (2), and a plurality of needle valve pouring pipes (8) are provided at the bottom of the injection molding diverter plate (7).

3. The multi-point needle valve type pouring mechanism of the plastic storage box injection mold according to claim 2, characterized in that: The spliced ​​embedded molding ejection assembly (6) includes a central embedded component (9) and an edge embedded component (10) arranged in the molding upper template (1), and the central embedded component (9) and the edge embedded component (10) are respectively arranged in an alternating manner with the central ejection component (5).

4. The multi-point needle valve type pouring mechanism of the plastic storage box injection mold according to claim 3, characterized in that: The central embedded component (9) comprises a central embedded forming plate (11) and two side embedded forming plates (12), and the central embedded forming plate (11) and the side embedded forming plates (12) are slidably matched with each other.

5. The multi-point needle valve type pouring mechanism of the plastic storage box injection mold according to claim 4, characterized in that: The central embedded molding plate (11) is provided with a plurality of first injection molding holes (13) and a central rib molding portion (14), and the side embedded molding plate (12) is provided with a plurality of second injection molding holes (144) and a central side rib molding portion (15).

6. The multi-point needle valve type pouring mechanism of the plastic storage box injection mold according to claim 5, characterized in that: The upper molding template (1) has a central cavity (16), the central embedded molding plate (11) and the side embedded molding plates (12) are located in the central cavity (16), and the central embedded molding plate (11) is located between the two side embedded molding plates (12).

7. The multi-point needle valve type pouring mechanism of the plastic storage box injection mold according to claim 6, characterized in that: The edge inlay (10) comprises a plurality of side edge inlay molding plates (17) and end edge inlay molding plates (18), wherein the side edge inlay molding plates (17) and the end edge inlay molding plates (18) have edge rib molding parts (19).

8. The multi-point needle valve type pouring mechanism of the plastic storage box injection mold according to claim 7, characterized in that: The upper molding template (1) has an edge cavity (20) therein, and the side edge embedded molding plate (17) and the end edge embedded molding plate (18) are both located in the edge cavity (20).

9. The multi-point needle valve type pouring mechanism of the plastic storage box injection mold according to claim 8, characterized in that: The middle ejection member (5) comprises a straight ejection plate (21) and an inclined ejection plate (22) arranged on the upper ejection sliding plate (3), and the straight ejection plate (21) and the inclined ejection plate (22) are respectively arranged in an interlaced manner with the side edge embedded molding plate (17).

10. The multi-point needle valve type pouring mechanism of the plastic storage box injection mold according to claim 9, characterized in that: The straight top plate (21) and the inclined top plate (22) are in sliding cooperation with the upper forming template (1).

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