CN216506474U - Children bicycle front support injection mold - Google Patents
Children bicycle front support injection mold Download PDFInfo
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- CN216506474U CN216506474U CN202123217187.5U CN202123217187U CN216506474U CN 216506474 U CN216506474 U CN 216506474U CN 202123217187 U CN202123217187 U CN 202123217187U CN 216506474 U CN216506474 U CN 216506474U
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Abstract
The utility model discloses a child bicycle front support injection mold, which comprises an upper mold assembly and a lower mold assembly, wherein cavities are formed in the upper mold assembly and the lower mold assembly; the upper die assembly is provided with an injection molding hole which is communicated with the cavity for injection molding of the sizing material; the lower die assembly is provided with a beam sliding block assembly for forming the end part of the upper beam of the front support and a steering sliding block assembly for forming the end part of the steering support rod on the front support; the lower die assembly is provided with a gas blowing hole connected with the air pump, and the gas blowing hole is communicated with the cavity so as to enable the interior of a product formed in the cavity to be hollow; the lower die assembly is provided with a front flash groove, and the front flash groove is positioned on the side surface of the beam sliding block assembly and is communicated with the cavity; a rear flash groove is arranged on the steering slide block component and communicated with the cavity. The advantages are that: the utility model can effectively save cost and avoid sink marks on the outer surface of the molded product.
Description
Technical Field
The utility model belongs to the technical field of injection molds, and particularly relates to an injection mold for a front bracket of a children bicycle.
Background
At present, a front bracket (a structure shown in fig. 1) of a child bicycle is generally formed by stamping and welding metal materials, so that a front steering support rod and a cross beam are integrated to achieve a high-strength effect; however, because the weight of the metal material is heavier, the child bicycle made of metal has heavier weight and is more laborious to carry, and the cost of the metal material is higher, so that the existing child bicycle has higher manufacturing cost; in order to solve the above problems, the existing front bracket is generally made of plastic for injection molding, in order to make the interior of a product hollow, a core is mostly arranged on an injection mold for assistance (the outer diameter of the core is the inner diameter of the hollow portion of the product), the injection mold with such a structure wastes much plastic (the core is made of plastic), and after the core is pulled out, the surface of the product has sink marks due to pressure, which affects the appearance and strength of the molded product; there is a need for improvement.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art, and provides the injection mold for the front bracket of the children bicycle, which has the characteristics of effectively saving cost and avoiding the appearance of sink marks on the outer surface of a formed product.
In order to achieve the purpose, the utility model adopts the technical scheme that: a front bracket injection mold for a children bicycle comprises an upper mold component and a lower mold component, wherein cavities for forming plastics into products are formed in the upper mold component and the lower mold component; the upper die component is provided with an injection molding hole which is communicated with the cavity for injection molding of the sizing material; the lower die assembly is provided with a beam sliding block assembly for forming the end part of the upper beam of the front support and a steering sliding block assembly for forming the end part of the steering support rod on the front support; the lower die assembly is provided with a gas blowing hole connected with the air pump, and the gas blowing hole is communicated with the cavity so as to enable the interior of a product formed in the cavity to be hollow; the lower die assembly is provided with a front flash groove, the front flash groove is positioned on the side surface of the beam sliding block assembly and communicated with the cavity and is used for accommodating rubber materials overflowing during the molding of the hollow part of the beam; the steering slide block assembly is provided with a rear flash groove which is communicated with the cavity and used for containing rubber materials overflowing during molding of the hollow part of the steering support rod.
The lower die component is provided with a front flash channel, one end of the front flash channel is communicated with the die cavity, and the other end of the front flash channel is communicated with the front flash groove; the steering slide block assembly is provided with a rear flash channel, one end of the rear flash channel is communicated with the cavity, and the other end of the rear flash channel is communicated with a rear flash groove; and the front flash channel and the rear flash channel are respectively provided with a cut-off device for opening or closing the channel port.
The cut-off device consists of a lifting cut-off rod and a pneumatic control valve, and the lifting cut-off rod is connected with the pneumatic control valve and is controlled by the pneumatic control valve to lift up and down.
After adopting the structure, compared with the prior art, the utility model has the advantages that: the blowing holes can input inert gas to enable the interior of a molded product to be hollow, and then blown excess materials are collected through the front flash groove and the rear flash groove respectively.
Drawings
Fig. 1 is a schematic structural view of a front support (product) of a children's bicycle.
Fig. 2 is a schematic structural diagram of the present invention.
Fig. 3 is a schematic structural view of a lower mold assembly of the present invention.
Fig. 4 is a schematic view of the structure of the steering slider of the present invention.
Detailed Description
The following description is only a preferred embodiment of the present invention, and does not limit the scope of the present invention, and the present invention is further described with reference to the accompanying drawings and embodiments.
Examples, see fig. 2-4: a child bicycle front support injection mold comprises an upper mold component 10 and a lower mold component 20, wherein the upper mold component 10 and the lower mold component 20 are mutually matched in an opening and closing mode to perform injection molding on a product; the upper die assembly 10 and the lower die assembly 20 are provided with a cavity 30 for molding plastic into a product, the upper die assembly is provided with an injection molding hole 21, and the injection molding hole 21 is communicated with the cavity 30 through a drainage groove 25 on the lower die assembly 20 for performing glue injection molding. The lower die assembly 20 is provided with a beam slide block assembly 40 for forming the end part of the upper beam of the front support and a steering slide block assembly for forming the end part of a steering support rod on the front support, the beam slide block assembly 40 comprises a beam slide block I41, a beam slide block II 42, an insert 43 and a beam cylinder, the beam slide block I is fixed on the lower die 20, the insert 43 is connected to the beam slide block II 42 and moves along with the beam slide block II 42 and is used for forming the inner surface of the end part of the beam, and the beam slide block II 42 is opposite to the beam slide block I41 and is connected with the beam cylinder and slides in or out under the driving of the beam cylinder. In use, when the cavity 30 is filled with rubber, the intersection of the insert 43 and the cavity 30 can be hollowed due to the insert 43, and after cooling, the second beam slider 42 can drive the insert 43 to be drawn out from the cavity 30 under the driving of the beam cylinder, so that the hollow forming of the end is completed. The steering slide block assembly comprises two steering slide blocks 53 and a steering cylinder which are opposite in position, a cavity 30 is formed in each steering slide block 53 to form a steering support rod part, and each steering slide block 53 is connected with the steering cylinder and driven by the steering cylinder to move; when the steering support rod molding machine works, the two steering sliding blocks 53 are folded, and when the glue cools down, the two steering sliding blocks 53 respectively withdraw outwards, and then the steering support rod molding is completed. A blowing hole 22 connected with an air pump is formed in the lower die assembly 20, an air inlet of the blowing hole 22 is connected with an external air pump, and an air outlet of the blowing hole 22 is communicated with the die cavity 30 so that the interior of a product formed in the die cavity 30 is hollow; during operation, inert gas (generally nitrogen) discharged from the air pump enters the cavity 30 through the blowing holes 22, and then pressure is maintained and excess glue material overflows under the action of air pressure. A front flash groove 23 is arranged on the lower die assembly 20, the front flash groove 23 is positioned on the side surface of the beam sliding block assembly 40 and communicated with the cavity 30 and used for receiving rubber materials overflowing during the molding of the hollow part of the beam, a front flash channel 24 is arranged on the lower die assembly 20, one end of the front flash channel 24 is communicated with the cavity 30, and the other end of the front flash channel is communicated with the front flash groove 23; in operation, when the cavity 30 is filled with gas, under the action of air pressure, the rubber in the cavity 30 flows into the front flash groove 23 through the front flash channel 24 to be collected. A rear flash tank 51 is arranged on the steering slide block assembly, and the rear flash tank 51 is positioned in any one steering slide block 53, is communicated with the cavity 30 and is used for containing glue overflowing during the molding of the hollow part of the steering support rod; a rear flash channel 52 is arranged on the steering slide block 53, one end of the rear flash channel 52 is communicated with the cavity 30, and the other end is communicated with a rear flash groove 51; in operation, when the cavity 30 is filled with gas, the rubber in the cavity 30 flows into the back flash channel 23 through the back flash channel 52 under the action of gas pressure to be collected. Cut-off devices for opening or closing the channel openings are arranged on the front flash channel 24 and the rear flash channel 52, each cut-off device is composed of a lifting cut-off rod 60 and a pneumatic control valve, and the lifting cut-off rods 60 are connected with the pneumatic control valves and controlled by the pneumatic control valves to lift up and down. Before the material overflows, the end part of the lifting intercepting rod 60 extends into the material overflow channel to seal the material overflow channel so as to intercept the material overflow and prevent the rubber material from flowing into the material overflow channel; after the mold is filled with gas, the lifting cutoff rod 60 is controlled to move downwards, so that the flash channel is in a smooth state, and the rubber extruded by the air pressure can flow into the flash tank to be collected.
Other components of the upper mold assembly 10 and the lower mold assembly 20 are widely used at present, and the structure and principle thereof are the same as those of the prior art, and are not described herein again.
Claims (3)
1. A front bracket injection mold for a child bicycle comprises an upper mold component (10) and a lower mold component (20), wherein a cavity (30) for molding plastic into a product is formed in the upper mold component (10) and the lower mold component (20); the upper die component is provided with an injection molding hole (21), and the injection molding hole (21) is communicated with the cavity (30) to perform glue injection molding; the lower die assembly (20) is provided with a beam slide block assembly (40) for forming the end part of the upper beam of the front support and a steering slide block assembly for forming the end part of the steering support rod on the front support; the method is characterized in that: the lower die assembly (20) is provided with a gas blowing hole (22) connected with a gas pump, and the gas blowing hole (22) is communicated with the die cavity (30) so that the interior of a product formed in the die cavity (30) is hollow; a front flash groove (23) is formed in the lower die assembly (20), the front flash groove (23) is located on the side face of the beam sliding block assembly (40), is communicated with the cavity (30) and is used for containing rubber materials overflowing during the forming of the hollow portion of the beam; the steering slide block assembly is provided with a rear flash groove (51), the rear flash groove (51) is communicated with the cavity (30) and is used for containing rubber materials overflowing during molding of the hollow part of the steering support rod.
2. The injection mold for a front support of a children's bicycle according to claim 1, wherein: the lower die component (20) is provided with a front flash channel (24), one end of the front flash channel (24) is communicated with the die cavity (30), and the other end of the front flash channel is communicated with a front flash groove (23); a rear flash channel (52) is arranged on the steering slide block assembly, one end of the rear flash channel (52) is communicated with the cavity (30), and the other end of the rear flash channel is communicated with a rear flash groove (51); and the front flash channel (24) and the rear flash channel (52) are provided with cut-off devices for opening or closing channel openings.
3. The injection mold for a front support of a children's bicycle according to claim 2, wherein: the cut-off device consists of a lifting cut-off rod (60) and a pneumatic control valve, wherein the lifting cut-off rod (60) is connected with the pneumatic control valve and is controlled by the pneumatic control valve to lift up and down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123217187.5U CN216506474U (en) | 2021-12-17 | 2021-12-17 | Children bicycle front support injection mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123217187.5U CN216506474U (en) | 2021-12-17 | 2021-12-17 | Children bicycle front support injection mold |
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| Publication Number | Publication Date |
|---|---|
| CN216506474U true CN216506474U (en) | 2022-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123217187.5U Active CN216506474U (en) | 2021-12-17 | 2021-12-17 | Children bicycle front support injection mold |
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| CN (1) | CN216506474U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115139462A (en) * | 2022-05-26 | 2022-10-04 | 东风柳州汽车有限公司 | Reaction injection molding die and preparation method of reaction injection molding product |
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2021
- 2021-12-17 CN CN202123217187.5U patent/CN216506474U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115139462A (en) * | 2022-05-26 | 2022-10-04 | 东风柳州汽车有限公司 | Reaction injection molding die and preparation method of reaction injection molding product |
| CN115139462B (en) * | 2022-05-26 | 2023-12-15 | 东风柳州汽车有限公司 | Reaction injection molding die and preparation method of reaction injection molding product |
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