Injection molding device for plastic shell of stationery

Abstract

The utility model belongs to the technical field of injection molds, and particularly relates to a stationery plastic shell injection molding device which comprises a lower mold base and an upper mold base, the upper mold base is located over the lower mold base and has the moving freedom degree in the vertical direction, a forming mold cavity is formed in the lower mold base, an injection opening is formed in the upper mold base, and the injection opening is communicated with the forming mold cavity. The system further comprises a cold water tank, a second centrifugal pump, a water return pipe and a cold water pipeline. A flow channel is formed in the lower die base, a water inlet and a water outlet are fixed to two ports of the flow channel respectively, one end of the water return pipe is connected to the cold water tank, the other end of the water return pipe is connected to the water outlet, a water inlet port of the second centrifugal pump is connected to the cold water tank, and a water outlet port of the second centrifugal pump is connected to the water inlet through a cold water pipeline. And through arrangement of a flow channel, a cold water tank, a second centrifugal pump, a water return pipe and a cold water pipeline, the lower mold base can be rapidly cooled, the plastic shell can be rapidly cooled and solidified conveniently, safe and timely demolding and discharging are facilitated, and the machining efficiency is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection molds, and in particular relates to an injection molding device for a plastic shell of a stationery product. Background Art

[0002] Stationery refers to cultural tools, that is, basic tools for daily life and study management. With the continuous development and progress of science and technology, the types of stationery are becoming more and more, thus meeting people's higher and higher requirements. The plastic shell of stationery needs to be manufactured by stationery plastic shell injection molding device.

[0003] In the prior art, a Chinese utility model patent with authorization announcement number CN207156367U discloses "a stationery plastic shell injection molding device", including a frame, a lower mold base is welded at the top center position of the frame, a placement groove is opened at the top center position of the lower mold base, and the placement groove is a rectangular structure, a sliding groove is opened on the bottom inner wall of the placement groove, two placement circular holes are opened on the inner walls on both sides of the placement groove, and a fixed cylinder is fixed on the inner wall of each placement circular hole, a sliding plate is slidably connected to the inner wall of the fixed cylinder, and a first connecting rod is horizontally welded at the center position of one side of the sliding plates located on both sides of the placement groove close to each other, and a sliding block is welded at the end of the first connecting rod away from the sliding plate.

[0004] Although the injection molding device of the prior art is easy to demould, in actual use, the hot plastic solution still has residual temperature after molding, and it is necessary to wait for the blank to cool before safe demoulding. The mold cannot be demoulded in time, so the processing efficiency needs to be further improved.

[0005] In order to solve the above problems, the present application proposes a stationery plastic shell injection molding device. Utility Model Content

[0006] In order to solve the above problems existing in the prior art, the utility model provides a stationery plastic shell injection molding device, which has the characteristics of easy use and high processing efficiency.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a stationery plastic shell injection molding device, comprising a lower mold base and an upper mold base, wherein the upper mold base is located directly above the lower mold base and has a degree of freedom of movement in the vertical direction, a molding cavity is provided on the lower mold base, an injection port is provided on the upper mold base, and further comprises a cold water tank, a No. 2 centrifugal pump, a return pipe and a cold water pipeline;

[0008] A flow channel is opened in the lower mold base, and a water inlet and a water outlet are respectively fixed at the two ends of the flow channel. One end of the return pipe is connected to the cold water tank, and the other end is connected to the water outlet. The water inlet port of the No. 2 centrifugal pump is connected to the cold water tank, and the water outlet port is connected to the water inlet via a cold water pipe.

[0009] Preferably, it also includes a hot water tank, a No. 1 centrifugal pump and a hot water pipe, one end of the hot water pipe is connected to the water outlet port of the No. 1 centrifugal pump, and the other end is connected to the water inlet, and the water inlet port of the No. 1 centrifugal pump is connected to the hot water tank.

[0010] Preferably, it also includes a base, and the hot water tank, the cold water tank, the first centrifugal pump and the second centrifugal pump are all fixed on the base.

[0011] Preferably, a support box is fixed on the base, and the lower mold base is fixed on the top of the support box.

[0012] Preferably, it also includes a lifting cylinder, a lifting plate, a lifting rod and a lifting plate, the lifting cylinder is fixed in the support box, the lifting plate is fixed to the top of the piston rod of the lifting cylinder, the lifting rod is fixed to the lifting plate, a through hole for the lifting rod to pass through is opened on the lower mold base, and the lifting plate is located in the molding cavity and fixed to the top of the lifting rod.

[0013] Preferably, the outer wall of the lifting plate fits tightly against the inner wall of the molding cavity.

[0014] Preferably, it also includes a support column, a top plate and a vertical cylinder, wherein the top plate is supported and fixed on the base by the support column, the vertical cylinder is fixed on the top plate, and the piston rod of the vertical cylinder passes through the top plate and is fixedly connected to the upper mold base for controlling the lifting and lowering of the upper mold base.

[0015] Preferably, a guide column penetrating the top plate is fixed on the top surface of the upper die seat.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] In the utility model, the lower die seat can be quickly cooled by the provided flow channel, cold water tank, No. 2 centrifugal pump, return pipe and cold water pipeline, so as to facilitate the rapid cooling and solidification of the plastic shell, facilitate safe and timely demoulding and material removal, and greatly improve the processing efficiency.

[0018] Other additional advantages and beneficial effects of the present application will be given in part in the following description, and in part will become apparent from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 It is a structural schematic diagram of the utility model;

[0021] Figure 2 It is a schematic diagram of the cross-sectional structure of the lower die base in the utility model;

[0022] Figure 3 It is a schematic diagram of the cross-sectional structure of the support box in the utility model.

[0023] In the figure: 1. lower mold base; 101. molding cavity; 102. runner; 103. water inlet; 104. water outlet; 105. through hole; 2. upper mold base; 201. injection port; 3. base; 4. hot water tank; 5. cold water tank; 6. No. 1 centrifugal pump; 7. No. 2 centrifugal pump; 8. hot water pipe; 9. return pipe; 10. cold water pipe; 11. support box; 12. support column; 13. top plate; 14. vertical cylinder; 15. guide column; 16. lifting cylinder; 17. lifting plate; 18. lifting rod; 19. lifting plate. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-Figure 3 The utility model provides the following technical solutions: a stationery plastic shell injection molding device, comprising a lower mold base 1 and an upper mold base 2, the upper mold base 2 is located directly above the lower mold base 1 and has the freedom of movement in the vertical direction, the lower mold base 1 has a molding cavity 101, the upper mold base 2 is provided with an injection port 201, and also includes a cold water tank 5, a second centrifugal pump 7, a return pipe 9 and a cold water pipeline 10;

[0026] Depend on Figure 1 and Figure 2As shown, in the present embodiment, a flow channel 102 is opened in the lower mold base 1, and a water inlet 103 and a water outlet 104 are respectively fixed at the two ports of the flow channel 102, one end of the return pipe 9 is connected to the cold water tank 5, and the other end is connected to the water outlet 104, the water inlet port of the No. 2 centrifugal pump 7 is connected to the cold water tank 5, and the water outlet port is connected to the water inlet 103 by the cold water pipe 10. Therefore, when in use, the upper mold base 2 moves down and fits with the lower mold base 1 to achieve mold closing, and an external machine is used to inject the plastic solution into the molding cavity 101 at the injection port 201 for molding. After the injection molding is completed, the No. 2 centrifugal pump 7 is started, and the cooling water in the cold water tank 5 is extracted by the No. 2 centrifugal pump 7, and enters the flow channel 102 through the cold water pipe 10 to cool the lower mold base 1, so as to facilitate rapid cooling and solidification of the plastic shell, which is conducive to safe and timely demolding and unloading, and the processing efficiency is greatly improved. The used cooling water returns to the cold water tank 5 from the return pipe 9.

[0027] Preferably, by Figure 1 As shown, in this embodiment, a hot water tank 4, a No. 1 centrifugal pump 6 and a hot water pipe 8 are also included. One end of the hot water pipe 8 is connected to the water outlet port of the No. 1 centrifugal pump 6, and the other end is connected to the water inlet 103. The water inlet port of the No. 1 centrifugal pump 6 is connected to the hot water tank 4. An appropriate amount of preheated water is injected into the hot water tank 4. During injection molding, the No. 1 centrifugal pump 6 is first started to extract the preheated water in the hot water tank 4. The preheated water enters the flow channel 102 through the hot water pipe 8, and the lower mold base 1 is preheated first to avoid excessive temperature difference between the lower mold base 1 and the plastic solution affecting the molding.

[0028] It should be noted that Figure 1 It can be seen that the top end of the cold water pipe 10 is connected to the hot water pipe 8. During cooling, the cooling water first passes through the rear section of the hot water pipe 8 and then enters the flow channel 102. As common sense, due to the pressure inside the hot water pipe 8, the cooling water will not flow back after entering the hot water pipe 8. Under normal circumstances, it will only enter the flow channel 102 from the water inlet 103.

[0029] Preferably, by Figure 1 As shown, in this embodiment, a base 3 is also included, and the hot water tank 4, the cold water tank 5, the first centrifugal pump 6 and the second centrifugal pump 7 are all fixed on the base 3 for stably supporting the hot water tank 4, the cold water tank 5, the first centrifugal pump 6 and the second centrifugal pump 7.

[0030] Preferably, by Figure 1 As shown, in this embodiment, a support box 11 is fixed on the base 3 , and the lower mold base 1 is fixed on the top of the support box 11 to stably support the lower mold base 1 .

[0031] Preferably, by Figure 1 and Figure 3As shown, in this embodiment, it also includes a lifting cylinder 16, a lifting plate 17, a lifting rod 18 and a lifting plate 19. The lifting cylinder 16 is fixed in the support box 11, the lifting plate 17 is fixed to the top of the piston rod of the lifting cylinder 16, the lifting rod 18 is fixed on the lifting plate 17, and a through hole 105 for the lifting rod 18 to pass through is opened on the lower mold base 1. The lifting plate 19 is located in the molding cavity 101 and fixed to the top of the lifting rod 18. In the demolding stage, the lifting cylinder 16 is started, and the lifting plate 17 is pushed upward by the piston rod of the lifting cylinder 16. The lifting plate 17 uses the lifting rod 18 to push the lifting plate 19 upward, so that the blank can be safely demolded.

[0032] Preferably, by Figure 1 and Figure 3 As shown, in this embodiment, the outer wall of the lifting plate 19 is tightly attached to the inner wall of the molding cavity 101 to prevent the solution from entering the gap between the lifting plate 19 and the molding cavity 101.

[0033] Preferably, by Figure 1 As shown, in this embodiment, it also includes a support column 12, a top plate 13 and a vertical cylinder 14. The top plate 13 is supported and fixed on the base 3 by the support column 12. The vertical cylinder 14 is fixed on the top plate 13. The piston rod of the vertical cylinder 14 passes through the top plate 13 and is fixedly connected to the upper mold base 2 for controlling the lifting and lowering of the upper mold base 2. The vertical cylinder 14 provides power for the lifting and lowering of the upper mold base 2.

[0034] Preferably, by Figure 1 As shown, in this embodiment, a guide column 15 penetrating the top plate 13 is fixed on the top surface of the upper die base 2 to guide the upper die base 2 and improve the stability of the upper die base 2 .

[0035] Working principle and use process of the utility model: When using the stationery plastic shell injection molding device of the utility model, first inject a proper amount of preheated water into the hot water tank 4, and inject a proper amount of cooling water into the cold water tank 5;

[0036] Start the vertical cylinder 14 to move the upper mold base 2 downward to fit with the lower mold base 1 to achieve mold closing. First, start the No. 1 centrifugal pump 6 to extract the preheated water in the hot water tank 4. The preheated water enters the flow channel 102 through the hot water pipe 8 to preheat the lower mold base 1 first to avoid the temperature difference between the lower mold base 1 and the plastic solution being too large to affect the molding. The hot water used for preheating will return to the cold water tank 5 through the return pipe 9, and the hot water will become cold at this time.

[0037] Use an external machine to inject the plastic solution into the molding cavity 101 at the injection port 201 for molding;

[0038] After the injection molding is completed, the second centrifugal pump 7 is started, and the cooling water in the cold water tank 5 is extracted by the second centrifugal pump 7, and enters the flow channel 102 through the cold water pipe 10 to cool the lower mold base 1, so as to facilitate the rapid cooling and solidification of the plastic shell, which is conducive to safe and timely demoulding and material removal, and greatly improves the processing efficiency. The used cooling water returns to the cold water tank 5 from the return pipe 9;

[0039] During the demoulding stage, the lifting cylinder 16 is started, and the lifting plate 17 is pushed upward by the piston rod of the lifting cylinder 16. The lifting plate 17 uses the lifting rod 18 to push the lifting plate 19 upward, so that the blank can be safely demoulded.

[0040] It should be noted that centrifugal pump No. 1 6, centrifugal pump No. 2 7, vertical cylinder 14 and lifting cylinder 16 are all conventional commercially available equipment with built-in power switches. Technical personnel in this field can make routine selections according to usage requirements. Their working principles are common knowledge known to technical personnel in this field and have been fully disclosed in the prior art, so they will not be elaborated in this article.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A stationery plastic shell injection molding device, comprising a lower mold base (1) and an upper mold base (2), wherein the upper mold base (2) is located directly above the lower mold base (1) and has a degree of freedom of movement in the vertical direction, the lower mold base (1) has a molding cavity (101), and the upper mold base (2) is provided with an injection port (201), characterized in that: It also includes a cold water tank (5), a second centrifugal pump (7), a return pipe (9) and a cold water pipeline (10); A flow channel (102) is provided in the lower die base (1), and a water inlet (103) and a water outlet (104) are respectively fixed at two ends of the flow channel (102); one end of the return water pipe (9) is connected to the cold water tank (5), and the other end is connected to the water outlet (104); the water inlet port of the second centrifugal pump (7) is connected to the cold water tank (5), and the water outlet port is connected to the water inlet (103) via a cold water pipe (10).

2. The stationery plastic shell injection molding device according to claim 1, characterized in that: It also comprises a hot water tank (4), a first centrifugal pump (6) and a hot water pipe (8), one end of the hot water pipe (8) is connected to the water outlet port of the first centrifugal pump (6), and the other end is connected to the water inlet (103), and the water inlet port of the first centrifugal pump (6) is connected to the hot water tank (4).

3. The stationery plastic shell injection molding device according to claim 2, characterized in that: It also comprises a base (3), and the hot water tank (4), the cold water tank (5), the first centrifugal pump (6) and the second centrifugal pump (7) are all fixed on the base (3).

4. The stationery plastic shell injection molding device according to claim 3, characterized in that: A support box (11) is fixed on the base (3), and the lower mold base (1) is fixed on the top end of the support box (11).

5. The stationery plastic shell injection molding device according to claim 4, characterized in that: It also includes a lifting cylinder (16), a lifting plate (17), a lifting rod (18) and a lifting plate (19); the lifting cylinder (16) is fixed in the support box (11); the lifting plate (17) is fixed to the top of the piston rod of the lifting cylinder (16); the lifting rod (18) is fixed on the lifting plate (17); a through hole (105) for the lifting rod (18) to pass through is opened on the lower mold base (1); and the lifting plate (19) is located in the molding cavity (101) and fixed to the top of the lifting rod (18).

6. The stationery plastic shell injection molding device according to claim 5, characterized in that: The outer wall of the lifting plate (19) is tightly fitted to the inner wall of the molding cavity (101).

7. The stationery plastic shell injection molding device according to claim 3, characterized in that: It also includes a support column (12), a top plate (13) and a vertical cylinder (14), wherein the top plate (13) is supported and fixed on the base (3) by the support column (12), the vertical cylinder (14) is fixed on the top plate (13), and the piston rod of the vertical cylinder (14) passes through the top plate (13) and is fixedly connected to the upper die base (2) for controlling the lifting and lowering of the upper die base (2).

8. The stationery plastic shell injection molding device according to claim 7, characterized in that: A guide column (15) is fixed on the top surface of the upper die seat (2) and is arranged to penetrate the top plate (13).

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