New energy hydrogen storage tank inner container injection molding mold

Abstract

The invention relates to the technical field of injection molds, and provides a new energy hydrogen storage tank inner container injection molding mold which comprises a lower mold assembly and an upper mold assembly, the upper mold assembly is provided with a cylindrical groove, the lower mold assembly is provided with a molding column, the molding column is used for being arranged in the cylindrical groove to form a molding space, and the molding space is used for containing hydrogen. The upper mold assembly is provided with an injection molding opening, the injection molding opening is communicated with the molding space, the upper mold assembly is provided with an outer cooling passage, the molding column is internally provided with an inner cooling passage, and the inner cooling passage comprises a plurality of sections of cooling branches which are sequentially arranged in the direction far away from the injection molding opening. By means of the technical scheme, the problem that in the prior art, an injection mold is difficult to meet hydrogen storage tank inner container forming and efficient demolding is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of injection molds, and in particular to an injection molding mold for an inner liner of a new energy hydrogen storage tank. Background Art

[0002] With the rapid development of hydrogen fuel cells and high energy density engines, the demand for the development of energy storage and transportation equipment has also increased, especially the storage and transportation equipment of clean and green energy, such as hydrogen storage and transportation equipment. At present, the most mature, lowest cost and safest energy storage and transportation technology in international application is high-pressure gas storage and transportation technology. The most widely used high-pressure gas storage and transportation technology is the storage and transportation bottle. Since the storage and transportation bottle replaces the inner liner with a plastic liner, it has a lower material density, and can obtain a higher gas storage density in terms of storage and transportation, thereby improving economic benefits.

[0003] In the prior art, the inner liner of the storage and transportation bottle is formed by injection molding. However, since the inner liner is long and its inner wall is relatively thin, it is relatively difficult to demold after molding. There is no injection mold in the prior art that can achieve good molding and efficient and complete demolding. Based on the above problems, a new injection mold is needed to solve the above problems. Summary of the invention

[0004] The present invention proposes an injection molding mold for a new energy hydrogen storage tank liner, which solves the problem that the injection mold in the prior art is difficult to meet the requirements of hydrogen storage tank liner molding and efficient demoulding.

[0005] The technical solution of the present invention is as follows: A new energy hydrogen storage tank liner injection molding mold, the injection molding mold includes a lower mold component and an upper mold component, the upper mold component has a cylindrical groove, the lower mold component has a molding column, the molding column is used to be arranged in the cylindrical groove to form a molding space, the upper mold component is provided with an injection port, the injection port is connected to the molding space, the upper mold component is provided with an external cooling passage, and the molding column is provided with an internal cooling passage, wherein the internal cooling passage includes a plurality of cooling branches arranged in sequence in a direction away from the injection port.

[0006] The molding column includes a molding core sleeve, a core top cover and a cooling core body. The cooling core body is arranged on the inner side of the molding core sleeve. A plurality of cooling branches are sequentially arranged on the cooling core body in a direction away from the injection port. The core top cover is arranged on the top of the molding core sleeve and is hemispherical.

[0007] An inner groove is arranged at the center of the core top cover, and the molding column further comprises a plurality of air top units, which are arranged on the top of the cooling core body and are distributed at equal intervals around the circumference. The core top cover is connected to the air top units, and the core top cover can move along the axial direction of the molding core sleeve.

[0008] The lower mold assembly also includes a demoulding unit, which includes a telescopic driving member and a demoulding push plate. The demoulding push plate is sleeved on the forming column, and the upper mold assembly abuts against the demoulding push plate. The telescopic driving member is connected to the demoulding push plate to drive the demoulding push plate to move.

[0009] The demoulding push plate comprises a push plate base and a demoulding collar, wherein the demoulding collar is detachably arranged on the push plate base, the telescopic driving member is connected to the push plate base, and the molding column passes through the demoulding collar.

[0010] The lower mold assembly also includes a lower fixed plate and a lower mold base, the lower mold base is arranged on the lower fixed plate, one end of the telescopic driving member is fixedly arranged on the lower fixed plate or the lower mold base, and the telescopic end of the telescopic driving member is connected to the push plate base.

[0011] The lower mold assembly also includes a positioning pin, a first positioning hole is provided on the side wall of the molding core sleeve, a second positioning hole is provided on the lower mold base, and the positioning pin passes through the second positioning hole and is inserted into the first positioning hole.

[0012] The upper mold assembly includes an upper fixed plate, a first upper mold unit and a second upper mold unit. The first upper mold unit and the second upper mold unit are sequentially arranged on the upper fixed plate in a direction away from the upper fixed plate. The first upper mold unit and the second upper mold unit are both provided with sub-grooves, and the two sub-grooves are connected in series to form the cylindrical groove. The first upper mold unit and the second upper mold unit are both provided with an external cooling passage. The injection port is arranged on the upper fixed plate and is connected to the sub-groove of the first upper mold unit.

[0013] The working principle and beneficial effects of the present invention are: The present invention discloses an injection molding mold for the inner liner of a new energy hydrogen storage tank. A cylindrical groove is arranged on an upper mold assembly, and a molding column is arranged on a lower mold assembly. After the upper mold assembly and the lower mold assembly are molded together, the molding column extends into the cylindrical groove. There is a gap between the inner wall of the cylindrical groove and the molding column to form a molding space. The molding material is injected into the injection molding space at the injection port of the upper mold assembly. In order to enable rapid molding and easy demolding without occupying a connection, an internal cooling passage is arranged on the molding column for cooling. At the same time, an external cooling channel is arranged on the upper mold assembly for cooling, forming double-sided cooling. Further, in order to adapt to the heat dissipation on the inner side, the internal cooling channel on the molding column is sequentially provided with a plurality of cooling branches in a direction away from the injection port, and coolants of different temperatures can be introduced to form cooling areas of different temperatures, so that the inner liner can be cooled and molded synchronously, thus avoiding adhesion and improving the molding quality of the inner liner. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0015] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention; Figure 3 It is a schematic diagram of the internal structure of the present invention; In the figure: 1. lower mold assembly, 2. upper mold assembly, 3. cylindrical groove, 4. molding column, 5. injection port, 6. external cooling passage, 7. internal cooling passage, 8. molding core sleeve, 9. core top cover, 10. cooling core, 11. internal groove, 12. air top unit, 13. telescopic drive member, 14. demoulding push plate, 15. push plate base, 16. demoulding collar, 17. lower fixing plate, 18. lower mold base, 19. positioning pin, 20. first positioning hole, 21. second positioning hole, 22. upper fixing plate, 23. first upper mold unit, 24. second upper mold unit. DETAILED DESCRIPTION

[0016] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] like Figure 1~Figure 3 As shown, this embodiment proposes an injection molding mold for a new energy hydrogen storage tank liner, the injection molding mold includes a lower mold component 1 and an upper mold component 2, the upper mold component 2 has a cylindrical groove 3, the lower mold component 1 has a molding column 4, the molding column 4 is used to be arranged in the cylindrical groove 3 to form a molding space, the upper mold component 2 is provided with an injection port 5, the injection port 5 is connected to the molding space, the upper mold component 2 is provided with an external cooling passage 6, and the molding column 4 is provided with an internal cooling passage 7, wherein the internal cooling passage 7 includes a plurality of cooling branches arranged in sequence along a direction away from the injection port 5.

[0018] In the present embodiment, a new energy hydrogen storage tank liner injection molding mold is disclosed. A cylindrical groove 3 is provided on the upper mold component 2, and a molding column 4 is provided on the lower mold component 1. After the upper mold component 2 and the lower mold component 1 are molded, the molding column 4 extends into the cylindrical groove 3. There is a gap between the inner wall of the cylindrical groove 3 and the molding column 4 to form a molding space. The molding material is injected into the injection space at the injection port 5 of the upper mold component 2. In order to enable rapid molding and easy demolding without occupying the mold, an internal cooling passage 7 is provided on the molding column 4 for cooling. At the same time, an external cooling channel is provided on the upper mold component 2 for cooling to form double-sided cooling. Further, in order to adapt to the heat dissipation on the inner side, the internal cooling channel on the molding column 4 is sequentially provided with a plurality of cooling branches in the direction away from the injection port 5, and coolants of different temperatures can be introduced to form cooling areas of different temperatures, so that the liner can be cooled and molded synchronously, thereby avoiding adhesion and improving the molding quality of the liner.

[0019] The molding column 4 includes a molding core sleeve 8, a core top cover 9 and a cooling core body 10. The cooling core body 10 is arranged on the inner side of the molding core sleeve 8. A plurality of cooling branches are sequentially arranged on the cooling core body 10 in a direction away from the injection port 5. The core top cover 9 is arranged on the top of the molding core sleeve 8 and is hemispherical.

[0020] On the basis of the above embodiment, the cooling core 10 is inserted into the molding core sleeve 8, and then the core top cover 9 is covered on the top of the molding core sleeve 8 to enclose the cooling core 10 inside. The external molding core sleeve 8 and the core top cover 9 form a molding space with the cylindrical groove 3. The core top cover 9 is hemispherical, so that the injection port 5 can inject the molding material more evenly. Multiple cooling branches are arranged on the cooling core 10, which can gradually cool down according to the degree of shaping of the molding material, and gradually reduce the temperature in the direction away from the injection port 5, so that the molding material can be stably molded.

[0021] An inner groove 11 is arranged at the center of the core top cover 9, and the molding column 4 also includes a plurality of air top units 12, which are arranged on the top of the cooling core 10 and are distributed at equal intervals around the circumference. The core top cover 9 is connected to the air top units 12, and the core top cover 9 can move along the axial direction of the molding core sleeve 8.

[0022] In this embodiment, an inner groove 11 is provided at the central upper end of the core top cover 9. When the hydrogen storage tank liner is injection molded, its bottom will also form a thicker molding structure at the part of the inner groove 11. An air cap unit 12 is provided at the upper end of the cooling core 10. The air cap unit 12 can be stretched by pneumatics to push the liner down from the molding column 4 to achieve demolding. The air cap units 12 can be multiple and distributed at equal intervals around the circumference, so that a more stable and uniform thrust can be applied to the bottom of the liner. At the same time, the bottom thickness of the liner is increased, which also improves the reliability of demolding and avoids damage to the liner.

[0023] The lower mold assembly 1 also includes a demoulding unit, which includes a telescopic driving member 13 and a demoulding push plate 14. The demoulding push plate 14 is sleeved on the forming column 4, and the upper mold assembly 2 abuts against the demoulding push plate 14. The telescopic driving member 13 is connected to the demoulding push plate 14 to drive the demoulding push plate 14 to move.

[0024] In this embodiment, in order to further improve the efficiency, stability and quality of demolding, the lower mold assembly 1 also includes a telescopic drive member 13 and a demolding template. The above components constitute a demolding unit. The telescopic drive member 13 can drive the demolding push plate 14 to move up and down. The demolding push plate 14 is sleeved on the molding column 4. Then, after the upper mold assembly 2 and the lower mold assembly 1 are molded together, the bottom of the upper mold assembly 2 abuts against the demolding push plate 14. After injection molding, the upper mold assembly 2 is opened, and the inner liner is demolded under the push of the air top unit 12. At the same time, the demolding push plate 14 located at the bottom end face of the inner liner will also be driven by the telescopic drive member 13 to push the inner liner upward to achieve demolding. It should be noted that the telescopic drive member 13 can be a telescopic cylinder. The installation method and direction can be adjusted according to actual needs. At the same time, multiple telescopic drive members 13 can be set so that the demolding push plate 14 can be raised and lowered smoothly.

[0025] The demoulding push plate 14 includes a push plate base 15 and a demoulding collar 16 . The demoulding collar 16 is detachably disposed on the push plate base 15 . The telescopic driving member 13 is connected to the push plate base 15 . The molding column 4 passes through the demoulding collar 16 .

[0026] In this embodiment, the demoulding push plate 14 passes through the push plate base 15 and the demoulding ring 16. The demoulding ring 16 is detachably installed on the push plate base 15. The demoulding ring 16 can be removed and replaced. The telescopic driving member 13 is connected to the push plate base 15 to drive the up and down movement. The forming column passes through the demoulding ring 16 to achieve position matching.

[0027] The lower mold assembly 1 also includes a lower fixed plate 17 and a lower mold base 18 , the lower mold base 18 is disposed on the lower fixed plate 17 , one end of the telescopic driving member 13 is fixedly disposed on the lower fixed plate 17 or the lower mold base 18 , and the telescopic end of the telescopic driving member 13 is connected to the push plate base 15 .

[0028] In this embodiment, the lower mold assembly 1 is a lower mold base 18 installed on the lower fixed plate 17, wherein one end of the telescopic driving member 13 is fixed, and can be selectively fixed on the lower fixed plate 17 or nailed to the lower mold base 18, and the other end of the telescopic driving member 13 is connected to the push plate base 15.

[0029] The lower mold assembly 1 further includes a positioning pin 19 , a first positioning hole 20 is provided on the side wall of the molding core sleeve 8 , a second positioning hole 21 is provided on the lower mold base 18 , and the positioning pin 19 passes through the second positioning hole 21 and is inserted into the first positioning hole 20 .

[0030] In this embodiment, the molding core sleeve 8 is installed on the lower mold base 18, wherein a second positioning hole 21 is set on the lower mold base 18, and a first positioning hole 20 is set on the molding core sleeve 8. The molding core sleeve 8 is fixed by inserting the positioning pin 19 into the second positioning hole 21 and then into the first positioning hole 20 to improve the stability of its position.

[0031] The upper mold assembly 2 includes an upper fixed plate 22, a first upper mold unit 23 and a second upper mold unit 24. The first upper mold unit 23 and the second upper mold unit 24 are sequentially arranged on the upper fixed plate 22 in a direction away from the upper fixed plate 22. The first upper mold unit 23 and the second upper mold unit 24 are both provided with sub-grooves, and the two sub-grooves are connected in series to form the cylindrical groove 3. The first upper mold unit 23 and the second upper mold unit 24 are both provided with an external cooling passage 6. The injection port 5 is arranged on the upper fixed plate 22 and is connected to the sub-groove of the first upper mold unit 23.

[0032] In this embodiment, the upper mold assembly 2 is composed of an upper fixed plate 22, a first upper mold unit 23 and a second upper mold unit 24. The first upper mold unit 23 and the second upper mold unit 24 are installed in sequence on the bottom surface of the upper fixed plate 22. The first upper mold unit 23 and the second upper mold unit 24 are both provided with sub-grooves. The two upper mold units are combined to form a pass groove. An injection port 5 is installed on the upper fixed plate 22. The injection port 5 is connected to the sub-groove of the first upper mold unit 23, thereby realizing the supply of molding material.

[0033] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A new energy hydrogen storage tank liner injection molding mold, characterized in that: The injection molding mold comprises a lower mold component (1) and an upper mold component (2), the upper mold component (2) having a cylindrical groove (3), the lower mold component (1) having a molding column (4), the molding column (4) being used to be arranged in the cylindrical groove (3) to form a molding space, the upper mold component (2) being provided with an injection port (5), the injection port (5) being connected to the molding space, the upper mold component (2) being provided with an external cooling passage (6), and the molding column (4) being provided with an internal cooling passage (7), wherein the internal cooling passage (7) comprises a plurality of cooling branches arranged in sequence in a direction away from the injection port (5).

2. The new energy hydrogen storage tank liner injection molding mold according to claim 1 is characterized in that: The molding column (4) comprises a molding core sleeve (8), a core top cover (9) and a cooling core body (10); the cooling core body (10) is arranged on the inner side of the molding core sleeve (8); a plurality of cooling branches are arranged in sequence on the cooling core body (10) in a direction away from the injection port (5); the core top cover (9) is arranged on the top of the molding core sleeve (8); and the core top cover (9) is hemispherical.

3. The new energy hydrogen storage tank liner injection molding mold according to claim 2 is characterized in that: An inner groove (11) is arranged at the center of the core top cover (9), and the molding column (4) also includes a plurality of air top units (12). The plurality of air top units (12) are arranged on the top of the cooling core (10) and are distributed at equal intervals around the circumference. The core top cover (9) is connected to the air top units (12), and the core top cover (9) can move along the axial direction of the molding core sleeve (8).

4. The new energy hydrogen storage tank liner injection molding mold according to claim 3 is characterized in that: The lower mold assembly (1) also includes a demoulding unit, which includes a telescopic driving member (13) and a demoulding push plate (14). The demoulding push plate (14) is sleeved on the molding column (4), and the upper mold assembly (2) abuts against the demoulding push plate (14). The telescopic driving member (13) is connected to the demoulding push plate (14) to drive the demoulding push plate (14) to move.

5. The new energy hydrogen storage tank liner injection molding mold according to claim 4 is characterized in that: The demoulding push plate (14) comprises a push plate base (15) and a demoulding collar (16); the demoulding collar (16) is detachably arranged on the push plate base (15); the telescopic driving member (13) is connected to the push plate base (15); and the molding column passes through the demoulding collar (16).

6. The new energy hydrogen storage tank liner injection molding mold according to claim 5 is characterized in that: The lower mold assembly (1) further comprises a lower fixed plate (17) and a lower mold base (18), wherein the lower mold base (18) is arranged on the lower fixed plate (17), one end of the telescopic driving member (13) is fixedly arranged on the lower fixed plate (17) or the lower mold base (18), and the telescopic end of the telescopic driving member (13) is connected to the push plate base (15).

7. The new energy hydrogen storage tank liner injection molding mold according to claim 6 is characterized in that: The lower mold assembly (1) further comprises a positioning pin (19), a first positioning hole (20) is provided on a side wall of the molding core sleeve (8), a second positioning hole (21) is provided on the lower mold base (18), and the positioning pin (19) passes through the second positioning hole (21) and is inserted into the first positioning hole (20).

8. The new energy hydrogen storage tank liner injection molding mold according to claim 1 is characterized in that: The upper mold assembly (2) comprises an upper fixed plate (22), a first upper mold unit (23) and a second upper mold unit (24); the first upper mold unit (23) and the second upper mold unit (24) are arranged on the upper fixed plate (22) in sequence in a direction away from the upper fixed plate (22); the first upper mold unit (23) and the second upper mold unit (24) are both provided with a sub-groove; the two sub-grooves are connected in series to form the cylindrical groove (3); the first upper mold unit (23) and the second upper mold unit (24) are both provided with an external cooling passage (6); the injection port (5) is arranged on the upper fixed plate (22) and is connected to the sub-groove of the first upper mold unit (23).

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