Injection molding mold for pin-point gate hot runner of plastic folding cabinet

Abstract

The utility model belongs to the technical field of molds, and particularly relates to an injection molding mold for a pin-point gate hot runner of a plastic folding cabinet. The folding cabinet plate forming die comprises a folding cabinet plate forming upper die and a folding cabinet plate forming lower die, and two forming concave cavities are formed in the folding cabinet plate forming upper die. In the injection molding process, the molding concave cavity and the molding bulge are close to each other and are matched to form a main body structure of the plastic part, and the rotary shaft part molding concave cavity and the rotary shaft part molding bulge are close to each other and are matched to form a rotary shaft part structure of the plastic part; then the molten material is synchronously fed into the two cavities through the pin-point gate hot runner synchronous injection molding assembly, secondary pressurization in the injection molding process is achieved through a pin-point gate hot runner structure, it is ensured that the molten material can be synchronously and uniformly injected into the two cavities, a plastic part main body structure and a rotating shaft part structure are uniformly filled, the surface quality defects of a plastic part are reduced, and the product quality is improved. The overall quality of plastic parts is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of molds and relates to a point-gate hot runner injection molding mold for a plastic folding cabinet. Background Art

[0002] Plastic folding cabinets are one of the common daily necessities used by households to store clothing and other items. Generally, plastic folding cabinet molds are used for injection molding. In order to improve the efficiency of injection molding, plastic folding cabinet molds generally use multi-cavity synchronous injection molding. During the injection molding process, it is difficult to inject molten materials into multiple cavities synchronously and evenly. When filling, the main structure and the shaft structure of the plastic part are easily not allowed to be filled, resulting in many surface quality defects of the plastic part and the overall quality of the plastic part is relatively average. Therefore, it is urgent to design a plastic folding cabinet point gate hot runner injection molding mold 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 a plastic mold for a household storage cabinet that is easy to quickly form [application number: 202220281085.5], which includes a base, a lifting plate, a mounting rod and a water inlet port. A lifting plate is movably provided at the top of the base, and support frames are slidably provided on both sides of the top of the lifting plate. A left mold seat and a right mold seat are fixed inside the two support frames respectively; the electric hydraulic cylinder of the utility model drives the two support frames to slide toward the middle, so that the left mold seat and the right mold seat are fitted together, and at the same time, the side of the support frame fixes the left mold seat and the right mold seat through the mounting rod and the fixing screw, so that mold seats with different structures are replaced conveniently, thereby casting plastic storage cabinets with different cavities. Utility Model Content

[0004] The utility model aims to solve the above problems and provides a point gate hot runner injection molding die for a plastic folding cabinet.

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

[0006] A point-gate hot runner injection molding mold for a plastic folding cabinet, comprising a folding cabinet panel molding upper mold and a folding cabinet panel molding lower mold, wherein the folding cabinet panel molding upper mold is provided with two molding cavities, and the folding cabinet panel molding lower mold is provided with two molding protrusions, the molding cavities correspond to the positions of the molding protrusions and are matched in shape, an injection molding diverter is provided above the folding cabinet panel molding upper mold, and a point-gate hot runner synchronous injection molding component is also provided in the folding cabinet panel molding upper mold, the point-gate hot runner synchronous injection molding component is connected to the molding cavity, the molding cavity is connected to a rotating shaft molding cavity on the side, the molding protrusion is connected to a rotating shaft molding protrusion on the side, the rotating shaft molding cavity and the rotating shaft molding protrusion are arranged opposite to each other, and a large-area straight top piece that can reciprocate linearly in the vertical direction is provided below the folding cabinet panel molding lower mold.

[0007] In the above-mentioned plastic folding cabinet point gate hot runner injection molding mold, the point gate hot runner synchronous injection molding component includes two point casting ports arranged in the folding cabinet panel molding upper mold, and the bottom of the point casting port is connected to a hot runner diversion part, and the hot runner diversion part is connected to the molding cavity.

[0008] In the above-mentioned hot runner injection molding mold for a plastic folding cabinet, the hot runner diversion part includes a hot flow diversion channel arranged at the bottom of the point casting gate, the cross-section of the hot flow diversion channel is I-shaped, and a large flow channel connecting part is provided between the hot flow diversion channel and the molding cavity.

[0009] In the above-mentioned plastic folding cabinet point gate hot runner injection molding mold, the large runner connecting part includes a large runner through groove arranged between the hot flow diverter runner and the molding cavity, one side of the large runner through groove is connected to the hot flow diverter runner, and the other side is connected to the molding cavity.

[0010] In the above-mentioned plastic folding cabinet point gate hot runner injection molding mold, the injection diverter component includes an injection main board arranged above the folding cabinet panel molding upper mold, and an injection diverter plate is provided at the bottom of the injection main board, and the injection diverter plate is connected to the point casting port.

[0011] In the above-mentioned plastic folding cabinet point gate hot runner injection molding mold, two mold clamping fixing plates are arranged between the injection molding main board and the folding cabinet board molding upper mold, and the mold clamping fixing plates and the injection molding diverter plates are arranged alternately.

[0012] In the above-mentioned plastic folding cabinet point gate hot runner injection molding mold, the large-area straight ejector includes a plurality of straight ejector rods arranged below the folding cabinet panel molding lower mold, and the straight ejector rods pass through the folding cabinet panel molding lower mold and face the molding protrusions.

[0013] In the above-mentioned plastic folding cabinet point gate hot runner injection molding mold, a push rod fixing slide plate is provided below the folding cabinet panel molding lower mold, and the push rod fixing slide plate is fixedly connected to the straight push rod.

[0014] In the above-mentioned plastic folding cabinet point gate hot runner injection molding mold, a plurality of upper mold cooling water pipes parallel to each other are arranged in the folding cabinet panel molding upper mold.

[0015] In the above-mentioned plastic folding cabinet point gate hot runner injection molding mold, a plurality of lower mold cooling water pipes parallel to each other are arranged in the folding cabinet panel molding lower mold.

[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 folding cabinet panel molding upper mold and the folding cabinet panel molding lower mold close to each other, so that the molding cavity and the molding protrusion are close to each other, and cooperate to form the main structure of the plastic part, the shaft molding cavity and the shaft molding protrusion are close to each other, and cooperate to form the shaft structure of the plastic part. The molten material is injected through the injection molding diverter, and then the molten material is synchronously fed into the two cavities through the point gate hot runner synchronous injection molding component. The point gate hot runner structure is adopted to realize secondary pressurization during the injection molding process, ensuring that the molten material can be synchronously and evenly injected into the two cavities, evenly filling the main structure of the plastic part and the shaft structure, reducing the surface quality defects of the plastic part, and improving the overall quality of the plastic part.

[0018] 2. The large flow channel through the groove in the utility model can move the molten material at a large flow rate, further improving the injection molding rate.

[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 partial structural schematic diagram of the utility model in another direction.

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

[0024] In the figure: folding cabinet panel molding upper mold 1, folding cabinet panel molding lower mold 2, molding cavity 3, molding protrusion 4, injection molding diverter 5, point gate hot runner synchronous injection molding component 6, shaft molding cavity 7, shaft molding protrusion 8, large area straight ejector 9, point casting nozzle 10, hot runner diverter 11, hot flow diverter 12, large runner connecting part 13, large runner through groove 14, injection molding main board 15, injection molding diverter plate 16, mold fixing plate 17, straight ejector 18, ejector fixing slide plate 19, upper mold cooling water pipe 20, lower mold cooling water pipe 21. DETAILED DESCRIPTION

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

[0026] like Figure 1-4 As shown, a plastic folding cabinet point gate hot runner injection molding mold comprises a folding cabinet panel molding upper mold 1 and a folding cabinet panel molding lower mold 2, the folding cabinet panel molding upper mold 1 is provided with two molding cavities 3, the folding cabinet panel molding lower mold 2 is provided with two molding protrusions 4, the molding cavities 3 correspond to the positions of the molding protrusions 4 and are matched in shape, an injection molding diverter 5 is provided above the folding cabinet panel molding upper mold 1, and a point gate hot runner synchronous injection molding component 6 is also provided in the folding cabinet panel molding upper mold 1, the point gate hot runner synchronous injection molding component 6 is connected to the molding cavity 3, the molding cavity 3 is connected to a shaft molding cavity 7 on the side, the molding protrusion 4 is connected to a shaft molding protrusion 8 on the side, the shaft molding cavity 7 is arranged opposite to the shaft molding protrusion 8, and a large-area straight top piece 9 which can reciprocate linearly in the vertical direction is provided below the folding cabinet panel molding lower mold 2.

[0027] In this embodiment, during the injection molding process, the folding cabinet panel molding upper mold 1 and the folding cabinet panel molding lower mold 2 are brought close to each other, so that the molding cavity 3 and the molding protrusion 4 are close to each other, and cooperate to form the main structure of the plastic part, and the shaft molding cavity 7 and the shaft molding protrusion 8 are close to each other, and cooperate to form the shaft structure of the plastic part. The molten material is injected through the injection molding diverter 5, and then the molten material is synchronously fed into the two cavities through the point gate hot runner synchronous injection molding component 6. The point gate hot runner structure is adopted to realize secondary pressurization during the injection molding process, ensuring that the molten material can be synchronously and evenly injected into the two cavities, uniformly filling the main structure of the plastic part and the shaft structure, reducing the surface quality defects of the plastic part, and improving the overall quality of the plastic part.

[0028] Combination Figure 1-4 As shown, the point gate hot runner synchronous injection molding component 6 includes two point casting molding ports 10 arranged in the folding cabinet panel molding upper mold 1, and the bottom of the point casting molding port 10 is connected to a hot runner diversion part 11, and the hot runner diversion part 11 is connected to the molding cavity 3.

[0029] Specifically, the molten material is injected through the injection molding diverter 5, and then synchronously fed into the two cavities through the two point casting gates 10 and the hot runner diverter 11. The point casting hot runner structure is adopted to realize secondary pressurization during the injection molding process, ensuring that the molten material can be synchronously and evenly injected into the two cavities, evenly filling the main structure of the plastic part and the shaft structure, reducing the surface quality defects of the plastic part, and improving the overall quality of the plastic part.

[0030] The hot runner shunt portion 11 includes a hot runner shunt 12 disposed at the bottom of the point casting port 10 . The cross section of the hot runner shunt 12 is I-shaped. A large runner connecting portion 13 is disposed between the hot runner shunt 12 and the molding cavity 3 .

[0031] In this embodiment, the molten material is injected through the injection molding diverter 5, and then the molten material is synchronously fed into the two cavities through the two point injection molding gates 10 and the hot flow diverter 12. The point gate hot runner structure is adopted to realize the secondary pressurization during the injection molding process, ensuring that the molten material can be synchronously and evenly injected into the two cavities, uniformly filling the main structure of the plastic part and the shaft structure, reducing the surface quality defects of the plastic part, and improving the overall quality of the plastic part;

[0032] The cross section of the hot flow diverter channel 12 is I-shaped, and the injection molding range is large. The large flow channel connecting portion 13 can move the molten material with a large flow rate, further improving the injection molding rate.

[0033] Combination Figure 2 , Figure 4 As shown, the large flow channel connecting portion 13 includes a large flow channel through groove 14 arranged between the hot flow shunt channel 12 and the molding cavity 3. One side of the large flow channel through groove 14 is connected to the hot flow shunt channel 12, and the other side is connected to the molding cavity 3.

[0034] In this embodiment, the large flow channel through the groove 14 can move the molten material at a large flow rate, further improving the injection molding rate.

[0035] The injection molding diverter 5 comprises an injection molding main board 15 arranged above the folding cabinet panel forming upper mold 1 , and an injection molding diverter plate 16 is arranged at the bottom of the injection molding main board 15 , and the injection molding diverter plate 16 is connected to the point casting port 10 .

[0036] In this embodiment, during the injection molding process, the molten material is injected through the injection molding main board 15, and then diverted by the injection molding diverter plate 16 before being injected into the point casting port 10 for injection molding.

[0037] Combination Figure 1 As shown, two mold fixing plates 17 are arranged between the injection molding main board 15 and the folding cabinet board molding upper mold 1, and the mold fixing plates 17 and the injection molding diverter plates 16 are arranged alternately.

[0038] In this embodiment, the mold clamping fixing plate 17 is used to fix the injection manifold plate 16 .

[0039] The large-area straight top piece 9 includes a plurality of straight top rods 18 disposed below the folding cabinet board forming lower die 2 . The straight top rods 18 penetrate through the folding cabinet board forming lower die 2 and face the forming protrusions 4 .

[0040] In this embodiment, after the injection molding is completed and the mold is opened, the molded plastic part is ejected and demolded by the straight ejector 18, and the ejection area and ejection range are large.

[0041] Combination Figure 1-3 As shown, a push rod fixing slide plate 19 is provided below the folding cabinet panel forming lower mold 2 , and the push rod fixing slide plate 19 is fixedly connected to the straight push rod 18 .

[0042] In this embodiment, the push rod fixing slide plate 19 is used to connect and fix the straight push rod 18 .

[0043] Combination Figure 1-4 As shown, a plurality of upper mold cooling water pipes 20 parallel to each other are arranged in the folding cabinet panel forming upper mold 1.

[0044] In this embodiment, after the injection molding is completed, cooling water is introduced into the upper mold cooling water pipe 20 to cool the upper surface of the plastic part and improve the upper surface quality of the plastic part.

[0045] Combination Figure 1-4 As shown, a plurality of lower mold cooling water pipes 21 parallel to each other are arranged in the folding cabinet panel forming lower mold 2.

[0046] In this embodiment, after the injection molding is completed, cooling water is introduced into the lower mold cooling water pipe 21 to cool the lower surface of the plastic part to improve the lower surface quality of the plastic part.

[0047] The working principle of the utility model is:

[0048] During the injection molding process, the folding cabinet panel molding upper mold 1 and the folding cabinet panel molding lower mold 2 are brought close to each other, so that the molding cavity 3 and the molding protrusion 4 are close to each other, and cooperate to form the main structure of the plastic part, and the shaft molding cavity 7 and the shaft molding protrusion 8 are close to each other, and cooperate to form the shaft structure of the plastic part. The injection is injected through the injection molding main board 15, and then injected into the point casting mold port 10 after being diverted by the injection molding diverter plate 16, and then the molten material is synchronously fed into the two cavities through the two point casting mold ports 10 and the hot flow diverter channel 12. The point gate hot runner structure is adopted to realize secondary pressurization during the injection molding process, ensuring that the molten material can be synchronously and evenly injected into the two cavities, and the main structure of the plastic part and the shaft structure are evenly filled, thereby reducing the surface quality defects of the plastic part and improving the overall quality of the plastic part.

[0049] The cross section of the hot flow diverter 12 is I-shaped, and the injection range is large. The large flow channel connecting part 13 can move the molten material with a large flow rate, further improving the injection rate. The large flow channel through groove 14 can move the molten material with a large flow rate, further improving the injection rate.

[0050] The mold fixing plate 17 is used to fix the injection manifold plate 16. After the injection molding is completed and the mold is opened, the molded plastic parts are ejected and demolded by the straight ejector rod 18. The ejection area is large and the ejection range is wide.

[0051] After the injection molding is completed, cooling water is introduced into the upper mold cooling water pipe 20 to cool the upper surface of the plastic part to improve the upper surface quality of the plastic part.

[0052] After the injection molding is completed, cooling water is introduced into the lower mold cooling water pipe 21 to cool the lower surface of the plastic part and improve the lower surface quality of the plastic part.

[0053] 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.

[0054] Although the terms such as folding cabinet panel forming upper mold 1, folding cabinet panel forming lower mold 2, forming cavity 3, forming protrusion 4, injection molding diverter 5, point gate hot runner synchronous injection molding component 6, shaft molding cavity 7, shaft molding protrusion 8, large area straight ejector 9, point injection molding port 10, hot runner diverter 11, hot runner diverter 12, large runner connecting part 13, large runner through groove 14, injection molding main board 15, injection molding diverter plate 16, mold clamping fixing plate 17, straight ejector 18, ejector fixing slide plate 19, upper mold cooling water pipe 20, lower mold cooling water pipe 21 are used more frequently in this article, 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 utility model, and interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A hot runner injection molding mold for a plastic folding cabinet, comprising an upper mold (1) for forming a folding cabinet panel and a lower mold (2) for forming a folding cabinet panel, characterized in that: The folding cabinet panel forming upper mold (1) is provided with two forming cavities (3), and the folding cabinet panel forming lower mold (2) is provided with two forming protrusions (4). The positions of the forming cavities (3) and the forming protrusions (4) correspond to each other and their shapes match each other. An injection molding diverter (5) is provided above the folding cabinet panel forming upper mold (1). A point gate hot runner synchronous injection molding component (6) is also provided inside the folding cabinet panel forming upper mold (1). The point gate hot runner synchronous injection molding component (6) is connected to the forming cavity (3). The side of the forming cavity (3) is connected to a rotating shaft forming cavity (7). The side of the forming protrusion (4) is connected to a rotating shaft forming protrusion (8). The rotating shaft forming cavity (7) and the rotating shaft forming protrusion (8) are arranged opposite to each other. A large-area straight top component (9) capable of reciprocating linear motion in the vertical direction is provided below the folding cabinet panel forming lower mold (2).

2. The point gate hot runner injection molding mold for plastic folding cabinet according to claim 1, characterized in that: The point-gate hot runner synchronous injection molding component (6) comprises two point-gate molding ports (10) arranged in the folding cabinet panel molding upper mold (1), and the bottom of the point-gate molding port (10) is connected to a hot runner shunt part (11), and the hot runner shunt part (11) is connected to the molding cavity (3).

3. The point gate hot runner injection molding mold for plastic folding cabinet according to claim 2, characterized in that: The hot runner shunt portion (11) comprises a hot runner shunt (12) arranged at the bottom of the point casting port (10), the cross section of the hot runner shunt (12) being I-shaped, and a large runner connecting portion (13) being provided between the hot runner shunt (12) and the molding cavity (3).

4. The point gate hot runner injection molding mold for plastic folding cabinet according to claim 3, characterized in that: The large flow channel connecting portion (13) comprises a large flow channel through groove (14) arranged between the hot flow shunt flow channel (12) and the molding cavity (3); one side of the large flow channel through groove (14) is connected to the hot flow shunt flow channel (12), and the other side is connected to the molding cavity (3).

5. The point gate hot runner injection molding mold for plastic folding cabinet according to claim 4, characterized in that: The injection molding flow divider (5) comprises an injection molding main board (15) arranged above the folding cabinet panel forming upper mold (1), and an injection molding flow divider plate (16) is arranged at the bottom of the injection molding main board (15), and the injection molding flow divider plate (16) is connected to the point casting port (10).

6. The point gate hot runner injection molding mold for plastic folding cabinet according to claim 5, characterized in that: Two mold clamping fixing plates (17) are arranged between the injection molding main board (15) and the folding cabinet board molding upper mold (1), and the mold clamping fixing plates (17) and the injection molding diverter plates (16) are arranged in an alternating manner.

7. The point gate hot runner injection molding mold for plastic folding cabinet according to claim 6, characterized in that: The large-area straight top piece (9) comprises a plurality of straight top rods (18) arranged below the folding cabinet board forming lower die (2); the straight top rods (18) penetrate through the folding cabinet board forming lower die (2) and face the forming protrusions (4).

8. The point gate hot runner injection molding mold for plastic folding cabinet according to claim 7, characterized in that: A push rod fixing slide plate (19) is provided below the folding cabinet panel forming lower die (2), and the push rod fixing slide plate (19) is fixedly connected to the straight push rod (18).

9. The point gate hot runner injection molding mold for plastic folding cabinet according to claim 8, characterized in that: A plurality of upper die cooling water pipes (20) parallel to each other are arranged in the upper die (1) for forming the folding cabinet board.

10. The point gate hot runner injection molding mold for plastic folding cabinet according to claim 9, characterized in that: A plurality of mutually parallel lower mold cooling water pipes (21) are arranged in the folding cabinet board forming lower mold (2).

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