Coaming injection mold

Abstract

The utility model relates to a coaming injection mold which comprises a horizontally arranged fixed mold and a movable mold arranged above the fixed mold, a cavity is arranged on the upper surface of the fixed mold, a mold core in sliding fit with the cavity is arranged on the lower surface of the movable mold, a sprue penetrating through the movable mold is arranged on the movable mold, and a detachable plug is arranged in the sprue. The lower surface of the plug is flush with the lower surface of the mold core; the movable mold is connected with a lifting mechanism. Before injection, the lifting mechanism drives the movable mold to move upwards by a proper distance, so that the depth of the cavity is larger than the thickness of the coaming to be prepared, the volume of the cavity is enlarged, and during injection, larger flow can be adopted for injection, the injection time is saved, and the injection molding efficiency is improved. When the plastic injection amount reaches the set amount, the lifting mechanism drives the movable mold to move downwards, the mold core is used for extruding molten plastic, a cavity can be filled with the molten plastic faster and more evenly, and the quality of the coaming is guaranteed. Therefore, the injection molding efficiency can be improved, and the coaming quality can be ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to injection molding technical field especially, it is a kind of coaming injection mold. BACKGROUND

[0002] Coaming box is commonly used packaging box, usually plastic material, plastic coaming generally adopts injection molding process to produce, and the injection molding equipment used generally includes mould, the barrel for melting plastic raw material, the injection head for injecting plastic into mould and the conveying mechanism for conveying plastic in the barrel to injection head.The traditional mould is usually vertically and fixedly arranged, and the plastic is injected from the top of the mould, and the mold cavity is filled by using injection pressure and the gravity of plastic itself, which is low in efficiency, and since the thickness of coaming is small, plastic material is difficult to uniformly fill the mold cavity, affecting the strength of coaming. Since a larger injection pressure is required to fill the mold cavity with molten plastic, the injection head and the sprue must have good sealing to prevent molten plastic from leaking out through the sprue, increasing the difficulty of injection molding. SUMMARY

[0003] The utility model provides a kind of coaming injection mold to solve the technical problems that it provides, improve injection efficiency, and make molten plastic quickly, uniformly fill mold cavity.

[0004] To solve the above problems, the utility model adopts the technical scheme that: a coaming injection mold, including the horizontal setting fixed mould and the dynamic mould being arranged above the fixed mould, the upper surface of the fixed mould is provided with a mold cavity, the lower surface of the dynamic mould is provided with a mold core that is slidably matched with the mold cavity, the dynamic mould is provided with a sprue that penetrates the dynamic mould, the sprue is provided with a detachable plug, the lower surface of the plug is flush with the lower surface of the mold core;The dynamic mould is connected with a lifting mechanism.

[0005] Further, the sidewall of the mold cavity is provided with a plurality of exhaust grooves extending downward from the top of the sidewall, and the distance from the lower end of the exhaust groove to the bottom wall of the mold cavity is equal to the thickness of the coaming.

[0006] Further, the bottom sidewall of the fixed mould is provided with a horizontal positioning plate, the upper surface of the positioning plate is provided with a vertical guide shaft, the guide shaft penetrates the dynamic mould and is slidably matched with the dynamic mould.

[0007] Further, the lifting mechanism is installed on the positioning plate.

[0008] Further, the lifting mechanism is a hydraulic cylinder.

[0009] Further, the upper end of the gate is provided with a limiting slot, the top of the limiting slot is provided with two horizontal limiting plates, the two limiting plates are respectively located on the two sides of the gate, the plug is rotationally matched with the gate, the two sides of the plug are provided with horizontal supporting plates, the supporting plates are located in the limiting slot, and when the plug is rotated, the supporting plates can be rotated to below the limiting plates.

[0010] Further, the gate and the plug are both circular truncated cones with diameters gradually decreasing from top to bottom.

[0011] Further, the outer wall of the plug is provided with a sealing gasket.

[0012] The beneficial effects of the utility model are as follows: before injection, the lifting mechanism drives the movable mold to move upwards by a proper distance, so that the depth of the cavity is greater than the thickness of the surrounding plate to be prepared, the volume of the cavity is expanded, during injection, a greater flow can be used for injection, injection time is saved, and injection molding efficiency is improved. When the plastic injection amount reaches the set amount, the lifting mechanism drives the movable mold to move downwards, and the molten plastic is extruded by the mold core, so that the molten plastic can be filled in the cavity faster and more uniformly, and the quality of the surrounding plate is ensured. It can be seen that the utility model can improve the injection molding efficiency and ensure the quality of the surrounding plate. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is the front view schematic diagram of the utility model;

[0014] Figure 2 is Figure 1 the enlarged schematic diagram of part A in the figure;

[0015] Figure 3 is Figure 2 the sectional view schematic diagram of B-B;

[0016] Figure 4 is the top view schematic diagram of the gate;

[0017] Mark: 11 - limiting slot; 12 - plug; 13 - fixed mold; 14 - movable mold; 15 - cavity; 16 - mold core; 17 - gate; 18 - exhaust groove; 19 - lifting mechanism; 110 - positioning plate; 111 - guide shaft; 112 - limiting plate; 113 - supporting plate; 114 - sealing gasket. DETAILED DESCRIPTION

[0018] The utility model is further described below in combination with the drawings and examples.

[0019] The utility model discloses a fence injection mold, including the horizontal setting fixed mould 13 and setting dynamic mould 14 in fixed mould 13 top, the upper surface of fixed mould 13 is provided with the cavity 15, and the profile size of cavity 15 is same with the profile size of the fence to be prepared, and the total depth of cavity 15 is greater than the thickness of the fence to be prepared, specifically, the total depth (that is the distance between the bottom wall of cavity 15 and the upper end of cavity 15) of cavity 15 is at least 1.5 times of the thickness of the fence. The lower surface of dynamic mould 14 is provided with the mould core 16 of sliding fit with cavity 15, and cavity 15 has good seal with mould core 16, to avoid the molten plastic material from entering the fit gap between cavity 15 and mould core 16. Dynamic mould 14 is provided with the gate 17 of penetrating dynamic mould 14, and the gate 17 is used to inject the molten plastic to cavity 15, and the gate 17 is provided with the detachable plug 12, after injection, the gate 17 is closed by the plug 12, to prevent the plastic in cavity 15 from entering the gate 17, and the lower surface of plug 12 is flush with the lower surface of mould core 16. Dynamic mould 14 is connected with the lifting mechanism 19, and the lifting mechanism 19 is used to drive dynamic mould 14 to lift as a whole, and the depth of cavity 15 can be adjusted when dynamic mould 14 lifts. When the lower surface of dynamic mould 14 contacts the upper surface of fixed mould 13 during the downward movement of dynamic mould 14, the depth of cavity 15 is equal to the thickness of the fence to be prepared.

[0020] The utility model discloses a fence injection mold, including the horizontal setting fixed mould 13 and setting dynamic mould 14 in fixed mould 13 top, the upper surface of fixed mould 13 is provided with the cavity 15, and the profile size of cavity 15 is same with the profile size of the fence to be prepared, and the total depth of cavity 15 is greater than the thickness of the fence to be prepared, specifically, the total depth (that is the distance between the bottom wall of cavity 15 and the upper end of cavity 15) of cavity 15 is at least 1.5 times of the thickness of the fence. The lower surface of dynamic mould 14 is provided with the mould core 16 of sliding fit with cavity 15, and cavity 15 has good seal with mould core 16, to avoid the molten plastic material from entering the fit gap between cavity 15 and mould core 16. Dynamic mould 14 is provided with the gate 17 of penetrating dynamic mould 14, and the gate 17 is used to inject the molten plastic to cavity 15, and the gate 17 is provided with the detachable plug 12, after injection, the gate 17 is closed by the plug 12, to prevent the plastic in cavity 15 from entering the gate 17, and the lower surface of plug 12 is flush with the lower surface of mould core 16. Dynamic mould 14 is connected with the lifting mechanism 19, and the lifting mechanism 19 is used to drive dynamic mould 14 to lift as a whole, and the depth of cavity 15 can be adjusted when dynamic mould 14 lifts. When the lower surface of dynamic mould 14 contacts the upper surface of fixed mould 13 during the downward movement of dynamic mould 14, the depth of cavity 15 is equal to the thickness of the fence to be prepared.

[0021] In the process that mould core 16 extrudes plastic, the plug 12 closes the gate 17, prevents plastic from entering the gate 17, and because the lower surface of the plug 12 is flush with the lower surface of the mould core 16, the upper surface of the fence obtained can be ensured to be flat.

[0022] The utility model discloses a mould for injection molding the surrounding board of the vehicle, which comprises a fixed mould 13 and a movable mould 14, wherein the fixed mould 13 is provided with a cavity 15, and the movable mould 14 is provided with a core 16, which is arranged in the cavity 15 and is capable of moving up and down.

[0023] Before injecting the plastic, the cavity 15 is filled with air, in order to prevent the air from entering the plastic and causing bubbles in the surrounding board, the utility model is provided with a plurality of exhaust grooves 18 extending downward from the top of the side wall of the cavity 15, and the distance from the lower end of the exhaust groove 18 to the bottom wall of the cavity 15 is equal to the thickness of the surrounding board. In the process of the core 16 extruding the molten plastic downward, the air in the cavity 15 can be discharged through the exhaust groove 18. When the lower surface of the movable mould 14 reaches the upper surface of the fixed mould 13, the movable mould 14 stops moving downward, the exhaust groove 18 is covered by the core 16, and thus the communication with the cavity 15 is disconnected, at this time, the depth of the cavity 15 is consistent with the thickness of the required surrounding board, and the required surrounding board is obtained.

[0024] The bottom side wall of the fixed mould 13 is provided with a horizontal positioning plate 110, the upper surface of the positioning plate 110 is provided with a vertical guide shaft 111, and the guide shaft 111 penetrates through the movable mould 14 and is in sliding fit with the movable mould 14. The guide shaft 111 can play the role of guiding and positioning, and can ensure that the movable mould 14 moves up and down stably and that the movable mould 14 and the fixed mould 13 are accurately closed.

[0025] A support can be arranged above the movable mould 14, and the lifting mechanism 19 is installed on the support, preferably, the lifting mechanism 19 is installed on the positioning plate 110, and the volume of the whole mould can be reduced.

[0026] In the utility model, the lifting mechanism 19 is a hydraulic cylinder, and other commonly used power equipment such as a pneumatic cylinder can also be used.

[0027] In order to facilitate the disassembly and assembly of the plug 12, the upper end of the sprue 17 is provided with a limiting groove 11, the limiting groove 11 is a circular groove, the top of the limiting groove 11 is provided with two horizontal limiting plates 112, the limiting plates 112 can be sector-shaped plates, the two limiting plates 112 are located on the two sides of the sprue 17 respectively, the plug 12 is in rotary fit with the sprue 17, the two sides of the plug 12 are provided with horizontal supporting plates 113, the supporting plates 113 can also be sector-shaped plates, the supporting plates 113 are located in the limiting groove 11, and when the plug 12 is rotated, the supporting plates 113 can be rotated to below the limiting plates 112.

[0028] When the plug 12 is installed, the plug 12 is inserted into the gate 17, the support plate 113 is aligned with the gap between the two limiting plates 112, so that the support plate 113 is located between the two limiting plates 112, after the lower surface of the support plate 113 abuts the groove bottom of the limiting groove 11, the plug 12 is rotated to drive the support plate 113 to rotate to the lower surface of the limiting plate 112, the limiting plate 112 and the groove bottom of the limiting groove 11 can limit the support plate 113 in the up-down direction, preventing the plug 12 from being separated from the gate 17. When the plug 12 is disassembled, the plug 12 is rotated so that the support plate 113 is rotated between the two limiting plates 112, and then the plug 12 can be pulled out.

[0029] In order to facilitate the plug 12 to be inserted into the gate 17, the gate 17 and the plug 12 are both circular truncated cones with diameters gradually decreasing from top to bottom. In order to improve the sealing performance and prevent molten plastic from entering the gap between the plug 12 and the gate 17 during extrusion, the outer wall of the plug 12 is provided with a sealing gasket 114, which can be made of common sealing materials such as rubber pads.

[0030] The above only describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can be variously changed and modified. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A wraparound injection mold characterized by: The mold includes a fixed mold (13) and a movable mold (14) arranged above the fixed mold (13), the upper surface of the fixed mold (13) is provided with a cavity (15), the lower surface of the movable mold (14) is provided with a mold core (16) in sliding fit with the cavity (15), the movable mold (14) is provided with a gate (17) penetrating the movable mold (14), the gate (17) is provided with a detachable plug (12), the lower surface of the plug (12) is flush with the lower surface of the mold core (16), and the movable mold (14) is connected with a lifting mechanism (19).

2. The enclosure injection mold of claim 1, wherein: The side wall of the cavity (15) is provided with a plurality of exhaust grooves (18) extending downward from the top of the side wall, and the distance from the lower end of the exhaust groove (18) to the bottom wall of the cavity (15) is equal to the thickness of the enclosing plate.

3. The enclosure injection mold of claim 1, wherein: The bottom side wall of the fixed mold (13) is provided with a horizontal positioning plate (110), the upper surface of the positioning plate (110) is provided with a vertical guide shaft (111), the guide shaft (111) penetrates the movable mold (14) and is in sliding fit with the movable mold (14).

4. The enclosure injection mold of claim 3, wherein: The lifting mechanism (19) is installed on the positioning plate (110).

5. The enclosure injection mold of claim 1, wherein: The lifting mechanism (19) is a hydraulic cylinder.

6. The enclosure injection mold of claim 1, wherein: The upper end of the gate (17) is provided with a limiting groove (11), the top of the limiting groove (11) is provided with two horizontal limiting plates (112), the two limiting plates (112) are respectively located on both sides of the gate (17), the plug (12) is in rotational fit with the gate (17), the plug (12) is provided with a horizontal supporting plate (113) on both sides, the supporting plate (113) is located in the limiting groove (11), and when the plug (12) is rotated, the supporting plate (113) can be rotated to below the limiting plate (112).

7. The enclosure injection mold of claim 6, wherein: The gate (17) and the plug (12) are both circular truncated cones with diameters gradually decreasing from top to bottom.

8. The enclosure injection mold of claim 7, wherein: The outer wall of the plug (12) is provided with a sealing gasket (114).

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