Environment-friendly hollow injection molding machine for preparing cycling helmet shell

Abstract

The application discloses an environmentally-friendly hollow injection molding machine for preparing a cycling helmet shell in the field of helmets. The helmet is provided with layered environmentally-friendly materials and new materials, and the new materials are arranged on the outer layer outside the environmentally-friendly materials. Compared with traditional mixed materials, the proportion of environmentally-friendly materials in the helmet can be increased, the environmental protection effect is further improved, the overall strength of the helmet is improved, the helmet can pass various tests, the new materials of the outer layer are integrally formed and wrapped outside the environmentally-friendly materials through the manufacturing of the hollow injection molding machine, compared with traditional suction molding process manufacturing, the cutting process is reduced, the cutting surface of the environmentally-friendly layer is avoided from being exposed, the integrality of the helmet is improved, the structural strength of the helmet is increased, and the proportion of the new materials and the environmentally-friendly materials can be quickly and conveniently adjusted by adjusting the discharging amount of the existing new material extrusion pipe and the environmentally-friendly material extrusion pipe, so that the overall practical effect of the equipment is further improved.

Description

TECHNICAL FIELD

[0001] The application relates to the field of helmets, in particular to a hollow injection molding machine for preparing an environmentally-friendly cycling helmet shell. BACKGROUND

[0002] A bicycle helmet is generally made of PP material, which is a recyclable material. After a series of crushing, cleaning, screening, modification and granulation processes, waste PC products are made into recycled particles, which are then extruded into a film or a plate, and are used in the production of bicycle helmets, and can pass the relevant cycling helmet physical property test and safety test.

[0003] The environmentally-friendly material (recycled PP material) cannot be used alone to make bicycle helmets, but needs to be mixed with part of new material (unused PP material) for making. If the two are simply mixed together to make a helmet, the appearance and strength cannot meet the relevant requirements.

[0004] Most solutions are to divide the helmet into three layers, with the outer layer and the inner layer being new material, and the middle layer being environmentally-friendly material. After being used together, the appearance and strength can meet the requirements. However, the production process of the helmet with this structure is a plastic suction process, that is, a three-layer plastic plate is prepared in advance, and then the excess plastic plate is cut off to complete the production.

[0005] The processing technology of plastic suction has some disadvantages. The middle layer of the cutting part is exposed outside, that is, the environmentally-friendly material is exposed outside. It cannot guarantee the integrity of the helmet, and the appearance is also affected to a certain extent. Therefore, further improvement is needed. SUMMARY

[0006] The purpose of the application is to improve the proportion of environmentally-friendly material in the helmet while ensuring the strength and other parameters of the helmet. Compared with the prior art, a hollow injection molding machine for preparing an environmentally-friendly cycling helmet shell is provided. The hollow injection molding machine comprises a movable mold and a fixed mold. The upper side and the lower side of the inside of the fixed mold are respectively provided with a new material pipe and an environmentally-friendly material pipe. The outer side wall of the fixed mold close to the new material pipe and the environmentally-friendly material pipe is respectively fixedly connected with a new material extrusion pipe and an environmentally-friendly material extrusion pipe. The new material extrusion pipe and the environmentally-friendly material extrusion pipe are respectively connected with the new material pipe and the environmentally-friendly material pipe. The side of the movable mold close to the fixed mold is provided with a pressure changing cavity. The opening end of the pressure changing cavity is fixedly connected with an elastic sheet. The hollow injection molding machine is used for preparing a helmet shell. The helmet shell is composed of an outer cladding layer and a filling layer. The outer cladding layer completely wraps the filling layer. The helmet shell not only increases the proportion of environmentally-friendly material in the helmet, but also improves the overall strength of the helmet.

[0007] Further, the inner part of the movable mold is provided with a gas cavity, and the outer side wall of the movable mold close to the gas cavity is fixedly connected with an outer pipe, and the outer pipe is communicated with the gas cavity, through the above setting, the inside of the variable pressure cavity can be inflated or pumped through the gas cavity and the outer pipe, so that the elastic sheet is raised or restored to its original state.

[0008] Further, the use method of the hollow injection molding machine comprises the following steps:

[0009] S1, the movable mold and the fixed mold are closed, and the new material is injected into the mold cavity between the movable mold and the fixed mold through the new material extrusion pipe and the new material pipe, and the volume of the injected new material is one third of the volume of the mold cavity;

[0010] S2, inflate the inside of the variable pressure cavity through the outer pipe and the gas cavity, so that the elastic sheet is raised and extrudes the new material, at this time the new material is adhered to the inner wall of the mold cavity;

[0011] S3, the gas in the variable pressure cavity is discharged outward, the elastic sheet is restored to its original state, and the new material is cooled and solidified, and a hollow layer is formed inside;

[0012] S4, fill the hollow layer between the new material with the environmental protection material through the environmental protection material extrusion pipe and the environmental protection material pipe, and open the mold after cooling to take out the helmet shell.

[0013] Optionally, one end of the environmental protection material pipe is fixedly connected with an electric heating pipe, and the electric heating pipe is located at the discharge end of the environmental protection material pipe, through the above setting, the discharge port of the environmental protection material pipe is prevented from being blocked during injection.

[0014] Optionally, a pressure supply pipe is arranged on one side of the movable mold, and a gas pipe is fixedly connected between the bottom end of the pressure supply pipe and the outer pipe.

[0015] Optionally, the top end of the pressure supply pipe is fixedly connected with an electric telescopic rod, and the movable end of the electric telescopic rod extends to the inner side of the pressure supply pipe and is fixedly connected with a piston.

[0016] Optionally, the piston is sealingly and slidably connected with the inner wall of the pressure supply pipe, and the gas pipe is made of flexible material, through the above setting, the inside of the variable pressure cavity can be inflated to make the elastic sheet raised, and the gas in the variable pressure cavity can be pumped out to make the elastic sheet restored to its original state.

[0017] Further, one end of the new material extrusion pipe is fixedly connected with a new material storage tank, and one end of the environmental protection material extrusion pipe is fixedly connected with an environmental protection material storage tank.

[0018] Optionally, the inside of the new material storage tank is filled with new material, and the inside of the environmental protection material storage tank is filled with environmental protection material, through the above setting, the corresponding raw materials are provided for the operation of the new material pipe and the environmental protection material pipe.

[0019] Optionally, the volume of a single injection of the new material pipe is one third of the total volume, and the volume of a single injection of the environment-friendly material pipe is two thirds of the total volume, through the above setting, not only the proportion of the environment-friendly material can be increased, but also the strength of the helmet can be ensured.

[0020] Compared with the prior art, the advantages of the present application are:

[0021] (1) The helmet is provided with layered environment-friendly material and new material, and the new material is arranged in the outer layer and wrapped outside the environment-friendly material. Compared with the traditional mixed material manufacturing, not only the proportion of the environment-friendly material in the helmet can be increased, and the environmental protection effect can be further improved, but also the overall strength of the helmet can be improved, so that the helmet can pass various tests. The helmet is manufactured by a hollow injection molding machine, so that the new material in the outer layer is integrally formed and wrapped outside the environment-friendly material. Compared with the traditional use of a suction process, not only the cutting process is reduced, but also the cutting surface of the environment-friendly layer is avoided from being exposed, the integrality of the helmet is improved, the structural strength of the helmet is increased, and the proportion of the new material and the environment-friendly material can be quickly and conveniently adjusted by adjusting the amount of discharge of the existing new material extrusion pipe and the environment-friendly material extrusion pipe, so that the overall practical effect of the equipment is further improved.

[0022] (2) The gas cavity is arranged in the movable mold, the outer pipe is fixedly connected to the outer side wall of the movable mold close to the gas cavity, and the outer pipe is in communication with the gas cavity. Through the above arrangement, the gas cavity and the outer pipe can be used to inflate or exhaust the inside of the pressure changing cavity, so that the elastic sheet is raised or restored to the original state.

[0023] (3) The environment-friendly material pipe is fixedly connected with the electric heating pipe at one end, and the electric heating pipe is located at the discharge end of the environment-friendly material pipe. Through the above arrangement, the discharge port of the environment-friendly material pipe is avoided from being blocked during material injection.

[0024] (4) The piston is sealingly and slidably connected to the inner wall of the pressure supply pipe, and the gas pipe is made of flexible material. Through the above arrangement, the inside of the pressure changing cavity can be inflated to raise the elastic sheet, and the gas in the pressure changing cavity can be exhausted to restore the elastic sheet to the original state.

[0025] (5) The new material storage tank is filled with new material, and the environment-friendly material storage tank is filled with environment-friendly material. Through the above arrangement, corresponding raw materials are provided for the operation of the new material pipe and the environment-friendly material pipe.

[0026] (6) The volume of a single injection of the new material pipe is one third of the total volume, and the volume of a single injection of the environment-friendly material pipe is two thirds of the total volume. Through the above arrangement, not only the proportion of the environment-friendly material can be increased, but also the strength of the helmet can be ensured. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is an appearance view of the helmet shell of the present application;

[0028] Figure 2The cross-sectional structure of the outer layer and the filling layer of the present application;

[0029] Figure 3 The front view cross-sectional diagram of the movable mold and the fixed mold of the present application;

[0030] Figure 4 The state diagram of the present application when the new material pipe injects the material into the mold cavity;

[0031] Figure 5 The state diagram of the present application when the elastic sheet is protruded;

[0032] Figure 6 The state diagram of the present application when the new material is adhered to the inner wall of the mold cavity;

[0033] Figure 7 The state diagram of the present application when the environmental protection material is filled into the hollow layer;

[0034] Figure 8 The enlarged structure diagram of A in the air cavity of the present application;

[0035] Figure 9 The front view cross-sectional diagram of the pressure supply pipe of the present application;

[0036] Figure 10 The front view cross-sectional diagram of the new material storage tank and the environmental protection material storage tank of the present application.

[0037] Explanation of the figure mark:

[0038] 1, helmet shell; 101, outer layer; 102, filling layer; 2, movable mold; 201, pressure changing cavity; 202, elastic sheet; 3, fixed mold; 301, new material pipe; 302, environmental protection material pipe; 4, new material extrusion pipe; 5, environmental protection material extrusion pipe; 6, pressure supply pipe; 601, electric telescopic rod; 602, piston; 603, air pipe; 7, air cavity; 8, outer pipe; 9, electric heating pipe; 10, new material storage tank; 11, environmental protection material storage tank. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application. Embodiment 1

[0040] Please refer to Figures 1-10The application discloses an environment-friendly hollow injection molding machine for preparing a cycling helmet shell, which comprises a movable mold 2 and a fixed mold 3, the upper side and the lower side of the fixed mold 3 are respectively provided with a new material pipe 301 and an environment-friendly material pipe 302, the outer side walls of the fixed mold 3 close to the new material pipe 301 and the environment-friendly material pipe 302 are respectively fixedly connected with a new material extrusion pipe 4 and an environment-friendly material extrusion pipe 5, the new material extrusion pipe 4 and the environment-friendly material extrusion pipe 5 are respectively connected with the new material pipe 301 and the environment-friendly material pipe 302, the side of the movable mold 2 close to the fixed mold 3 is provided with a pressure changing cavity 201, the opening end of the pressure changing cavity 201 is fixedly connected with an elastic sheet 202, the inside of the movable mold 2 is provided with a gas cavity 7, the outer side wall of the movable mold 2 close to the gas cavity 7 is fixedly connected with an outer pipe 8, and the outer pipe 8 is connected with the gas cavity 7, through the above arrangement, the inside of the pressure changing cavity 201 can be inflated or exhausted through the gas cavity 7 and the outer pipe 8, so that the elastic sheet 202 is protruded or restored to the original state, the hollow injection molding machine is used for preparing a helmet shell 1, and the helmet shell 1 is composed of an outer cladding layer 101 and a filling layer 102, and the outer cladding layer 101 completely wraps the filling layer 102.

[0041] The use method of the hollow injection molding machine comprises the following steps:

[0042] S1, the movable mold 2 and the fixed mold 3 are closed, the gap between the movable mold 2 and the fixed mold 3 is called a mold cavity, new material is injected into the mold cavity between the movable mold 2 and the fixed mold 3 through the new material extrusion pipe 4 and the new material pipe 301, and the volume of the injected new material is one third of the volume of the mold cavity;

[0043] S2, the inside of the pressure changing cavity 201 is inflated through the outer pipe 8 and the gas cavity 7, so that the elastic sheet 202 is protruded and extrudes the new material, at this time, the new material is adhered to the inner wall of the mold cavity;

[0044] S3, the gas in the inside of the pressure changing cavity 201 is discharged outward, so that the elastic sheet 202 is restored to the original state, and the new material is cooled and solidified, and a hollow layer is formed in the inside of the new material;

[0045] S4, environment-friendly material is injected into the hollow layer of the new material through the environment-friendly material extrusion pipe 5 and the environment-friendly material pipe 302 for filling, and the mold is opened after cooling, and the helmet shell is taken out;

[0046] The new material is arranged outside the outer layer and wrapped outside the environment-friendly material. Compared with the traditional mixed material manufacturing, not only the proportion of the environment-friendly material in the helmet can be increased, the environmental protection effect can be further improved, but also the overall strength of the helmet can be improved, so that the helmet can pass various tests. The hollow injection molding machine is manufactured, so that the outer layer of the new material is integrally formed and wrapped outside the environment-friendly material. Compared with the traditional use of the suction process manufacturing, not only the cutting process flow is reduced, but also the cutting surface of the environment-friendly layer is avoided to be exposed outside, the integrality of the helmet is improved, the structural strength of the helmet is increased, and the proportion of the new material and the environment-friendly material can be quickly and conveniently adjusted by adjusting the discharging amount of the new material extrusion pipe 4 and the environment-friendly material extrusion pipe 5, so that the overall practical effect of the equipment is further improved. Embodiment 2

[0047] Please refer to Figures 7-8 The same or corresponding parts as in embodiment 1 are denoted by the same reference numerals as in embodiment 1. For the sake of simplicity, only the differences between embodiment 2 and embodiment 1 will be described below. Embodiment 2 differs from embodiment 1 in that:

[0048] One end of the environment-friendly material pipe 302 is fixedly connected with the electric heating pipe 9, and the electric heating pipe 9 is located at the discharging end of the environment-friendly material pipe 302. After the new material is cooled and solidified, the environment-friendly material is injected into the hollow layer. Before the environment-friendly material pipe 302 injects the environment-friendly material into the hollow layer, the electric heating pipe 9 is started to heat the solidified new material around the discharging port of the environment-friendly material pipe 302. Then the environment-friendly material pipe 302 injects the environment-friendly material into the hollow layer. Through the above arrangement, the discharging port of the environment-friendly material pipe 302 is avoided to be blocked when injecting the material. The single injection volume of the new material pipe 301 is one third of the total volume, and the single injection volume of the environment-friendly material pipe 302 is two thirds of the total volume. The total volume refers to the sum of the single injection volumes of the new material pipe 301 and the environment-friendly material pipe 302, that is, the total material volume required for the injection molding helmet. Through the above arrangement, not only the proportion of the environment-friendly material can be increased, but also the strength of the helmet 1 can be ensured.

[0049] Please refer to Figures 4-5 The movable die 2 is provided with a pressure supply pipe 6. The bottom end of the pressure supply pipe 6 is fixedly connected with the air pipe 603 between the outer pipe 8. The top end of the pressure supply pipe 6 is fixedly connected with the electric telescopic rod 601. The movable end of the electric telescopic rod 601 extends to the inside of the pressure supply pipe 6 and is fixedly connected with the piston 602. The piston 602 is in sealing sliding connection with the inner wall of the pressure supply pipe 6. The air pipe 603 is made of flexible material. Through the above arrangement, when the movable end of the electric telescopic rod 601 moves downward, the piston 602 can be pushed to move downward, and the inside of the variable pressure cavity 201 can be inflated through the air pipe 603 to make the elastic sheet 202 protrude. Similarly, when the piston 602 moves upward, the gas in the inside of the variable pressure cavity 201 can be extracted to restore the original state of the elastic sheet 202.

[0050] Please refer to Figure 10The one end of the new material extrusion pipe 4 is fixedly connected with a new material storage tank 10, the one end of the environmental protection material extrusion pipe 5 is fixedly connected with an environmental protection material storage tank 11, the inside of the new material storage tank 10 is provided with new material, the inside of the environmental protection material storage tank 11 is provided with environmental protection material, through the above setting, the corresponding raw materials are provided for the operation of the new material pipe 301 and the environmental protection material pipe 302.

[0051] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the improvement concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. An environmentally friendly hollow injection molding machine for preparing a cycling helmet shell, characterized by, The hollow injection molding machine comprises a movable mold (2) and a fixed mold (3), the upper side and the lower side of the inside of the fixed mold (3) are respectively provided with a new material pipe (301) and an environmental protection material pipe (302), the outer side wall of the fixed mold (3) close to the new material pipe (301) and the environmental protection material pipe (302) is respectively fixedly connected with a new material extrusion pipe (4) and an environmental protection material extrusion pipe (5), the new material extrusion pipe (4) and the environmental protection material extrusion pipe (5) are respectively communicated with the new material pipe (301) and the environmental protection material pipe (302), the side of the movable mold (2) close to the fixed mold (3) is provided with a variable pressure cavity (201), the opening end of the variable pressure cavity (201) is fixedly connected with an elastic sheet (202), the hollow injection molding machine is used for preparing a helmet shell (1); the helmet shell (1) is composed of an outer cladding layer (101) and a filling layer (102), the outer cladding layer (101) completely wraps the filling layer (102).

2. The hollow injection molding machine for preparing an environmentally friendly cycling helmet shell according to claim 1, characterized in that, The inside of the movable mold (2) is provided with an air cavity (7), the outer side wall of the movable mold (2) close to the air cavity (7) is fixedly connected with an outer pipe (8), and the outer pipe (8) is communicated with the air cavity (7).

3. The hollow injection molding machine for preparing an environmentally friendly cycling helmet shell according to claim 2, characterized in that, The use method of the hollow injection molding machine comprises the following steps: S1, the movable mold (2) and the fixed mold (3) are closed, the new material is injected into the mold cavity between the movable mold (2) and the fixed mold (3) through the new material extrusion pipe (4) and the new material pipe (301), and the volume of the injected new material is one third of the volume of the mold cavity; S2, the inside of the variable pressure cavity (201) is inflated through the outer pipe (8) and the air cavity (7), so that the elastic sheet (202) is protruded and extrudes the new material, at this time, the new material is adhered to the inner wall of the mold cavity; S3, the gas in the inside of the variable pressure cavity (201) is discharged outward, so that the elastic sheet (202) returns to the original state, and the new material is cooled and solidified, and a hollow layer is formed in the inside of the new material; S4, the environmental protection material is injected into the hollow layer of the new material through the environmental protection material extrusion pipe (5) and the environmental protection material pipe (302) for filling, and the helmet shell is taken out after cooling and opening.

4. The hollow injection molding machine for preparing an environmentally friendly cycling helmet shell according to claim 1, characterized in that, One end of the environmental protection material pipe (302) is fixedly connected with an electric heating pipe (9), and the electric heating pipe (9) is located at the discharging end of the environmental protection material pipe (302).

5. The hollow injection molding machine for preparing an environmentally friendly cycling helmet shell according to claim 2, characterized in that, One side of the movable mold (2) is provided with a pressure supply pipe (6), and the bottom end of the pressure supply pipe (6) is fixedly connected with an air pipe (603) between the outer pipe (8).

6. The hollow injection molding machine for preparing an environmentally friendly cycling helmet shell according to claim 5, characterized in that, The top end of the pressure supply pipe (6) is fixedly connected with an electric telescopic rod (601), and the movable end of the electric telescopic rod (601) extends to the inside of the pressure supply pipe (6) and is fixedly connected with a piston (602).

7. The hollow injection molding machine for preparing an environmentally friendly cycling helmet shell according to claim 6, characterized in that, The piston (602) is in sealing sliding connection with the inner wall of the pressure supply pipe (6), and the air pipe (603) is made of flexible material.

8. The hollow injection molding machine for preparing an environmentally friendly cycling helmet shell according to claim 1, characterized in that, One end of the new material extrusion pipe (4) is fixedly connected with a new material storage tank (10), and one end of the environmental protection material extrusion pipe (5) is fixedly connected with an environmental protection material storage tank (11).

9. The hollow injection molding machine for preparing an environmentally friendly cycling helmet shell according to claim 8, characterized in that, The inside of the new material storage tank (10) is filled with new material, and the inside of the environmental protection material storage tank (11) is filled with environmental protection material.

10. The hollow injection molding machine for preparing an environmentally friendly cycling helmet shell according to claim 3, characterized in that, The volume of single injection of the new material pipe (301) is one third of the total volume, and the volume of single injection of the environmental protection material pipe (302) is two thirds of the total volume.

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