CN217123800U

CN217123800U - Gas-assisted forming mold core for handrail mold

Info

Publication number: CN217123800U
Application number: CN202122933866.6U
Authority: CN
Inventors: 张曦
Original assignee: Chongqing Jindi Auto Decorating Co ltd
Current assignee: Chongqing Jindi Auto Decorating Co ltd
Priority date: 2021-11-26
Filing date: 2021-11-26
Publication date: 2022-08-05
Anticipated expiration: 2031-11-26

Abstract

The utility model discloses a gas-assisted forming handrail mold core, which comprises an upper mold core, a plurality of cooling flow channels are arranged in the upper mold core, an upper mold cavity is arranged on the upper mold core, and a pouring channel of the upper mold core is communicated with the upper mold cavity; the lower mold core is also provided with a plurality of cooling runners, a cooling pipe is fixed in each cooling runner, a lower mold cavity is arranged in each lower mold core, an air passage is also arranged in each lower mold core, a blowing assembly is connected in each air passage, and each blowing assembly is communicated with the corresponding lower mold cavity. The mold core can save raw materials of the handrail during injection molding, improve the utilization rate of plastics by more than 50 percent, and effectively improve the market competitiveness of products.

Description

Gas-assisted forming mold core for handrail mold

Technical Field

The utility model belongs to the field of moulding plastics, concretely relates to fashioned handrail mold core is assisted to gas for mould.

Background

The automobile handrail is generally an injection molding, and when the automobile handrail is produced by injection molding, the injection molding machine is heated to a certain temperature by plastic, and can be melted into liquid, the molten liquid is injected into a closed die cavity by high pressure (the molten liquid is filled into a compact die cavity completely), and after cooling and shaping, the required plastic product is obtained by ejection after die opening, and the mode has the following defects and shortcomings:

1. the molten liquid is completely filled in the compact die cavity by high-pressure injection, so that more plastic is used and the product is heavy;

2. the material consumption is large, the molten liquid is ensured to be completely filled in the compact die cavity, the injection pressure is large, and the product is easy to warp and deform;

3. sink marks are easy to appear on the surfaces of wall thickness products and products with large wall thickness difference;

4. in order to ensure the size and the appearance quality of the product, the forming period is long.

SUMMERY OF THE UTILITY MODEL

In order to solve one or more technical problem among the prior art, the utility model discloses a fashioned mould core for handrail mould is assisted to gas, this mould core can make the handrail save raw materials when moulding plastics, improves the plastics utilization ratio and reaches more than 50%, has effectively improved product market competition.

In order to achieve the above object, the utility model provides a fashioned handrail mold core is assisted to gas, include:

the cooling device comprises an upper die core, a plurality of cooling runners are arranged in the upper die core, an upper die cavity is arranged on the upper die core, and a pouring channel of the upper die core is communicated with the upper die cavity;

the lower mold core is also provided with a plurality of cooling runners, a cooling pipe is fixed in each cooling runner, a lower mold cavity is arranged in each lower mold core, an air passage is also arranged in each lower mold core, a blowing assembly is connected in each air passage, and each blowing assembly is communicated with the corresponding lower mold cavity.

Furthermore, the air blowing assembly is communicated with a cavity at the free end of the tail part of the handrail.

Furthermore, the upper die cavity and the lower die cavity both comprise two die cavities.

Furthermore, the blowing assembly comprises a blowing pipe and a blowing needle, the tail end of the blowing pipe is connected with the blowing needle, the blowing needle comprises a needle sleeve and a needle tube, and the needle tube is fixed in the needle sleeve.

Further, the needle cover comprises a thin cover portion and a thick cover portion, the thin cover portion is connected with a sealing ring, the air passage comprises an air blowing pipeline and a needle cover channel, the needle cover channel comprises a thick channel and a thin channel, and the thin cover portion is in interference connection with the thin channel.

The utility model has the advantages that:

firstly, the mold core can save raw materials during injection molding of the handrail, the utilization rate of plastic is improved by more than 50%, the product is cooled in a mold for a period of time, the demolding speed is high, the market competitiveness of the product is effectively improved, and meanwhile the light weight of the product is realized;

secondly, a cavity can be blown out of the center of the handrail through the blowing action of the blowing assembly, so that the use of raw materials is effectively reduced, and after the handrail is solidified and demoulded, the strength of the handrail can still meet the relevant standards and requirements;

thirdly, when the air is blown, the air continues to provide the holding pressure, so that the problem of contraction or warping of the handrail is reduced to the minimum, and the appearance quality of the product is better.

Drawings

Fig. 1 is a schematic cross-sectional view of the present invention;

fig. 2 is a perspective view of the present invention;

FIG. 3 is a schematic view of the blowing assembly of the present invention connected to the upper mold core;

fig. 4 is a schematic structural view of the lower die core of the present invention;

fig. 5 is a schematic view of the structure of the blowing needle.

In the figure, 1, an upper mold core; 2. an upper mold cavity; 3. a lower mold core; 4. a lower die cavity; 5. an air blowing pipe; 6. a thin sleeve portion; 7. a coarse sleeve portion; 8. a seal ring; 9. a needle tube; 10. a gas blowing needle; 11. a coarse diameter path; 12. a small diameter channel; 13. air blowing pipeline

Detailed Description

The invention will be further explained with reference to the following figures and examples:

referring to fig. 1 to 5, the core for the gas-assisted handrail mold comprises:

the cooling device comprises an upper die core 1, wherein a plurality of cooling runners are formed in the upper die core 1, cooling pipes are fixed in the cooling runners, an upper die cavity 2 is formed in the upper die core 1, and a pouring channel of the upper die core 1 is communicated with the upper die cavity 2;

the lower mold core 3 is also provided with a plurality of cooling flow channels, cooling pipes are fixed in the cooling flow channels, and a lower mold cavity 4 is arranged in the lower mold core 3, so that the lower mold core 3 is also provided with an air passage, the air passage is connected with an air blowing assembly 5, and the air blowing assembly 5 is communicated with the lower mold cavity 4.

The utility model discloses the process is as follows when using, will go up mold core 1 and install on the cope match-plate pattern of mould, lower mold core 3 is installed on the lower bolster of mould, the product is in the time of moulding plastics molten material through the runner on the cope match-plate pattern with water and flow into in the last die cavity 2 of last mold core 1 and the die cavity of the lower die cavity 4 formation of lower mold core 3, wait for after the completion of molten material packing (need keep the short material state, do not need to fill out the die cavity completely promptly), at this moment, blow subassembly 5 and blow, to in the middle of the leading-in melting material of nitrogen gas through high-pressure compression, in this step, mainly divide into following several stages:

the first stage is as follows: the molten material enters the cavity, and then meets the mold wall of the cavity with lower temperature to form a thinner solidified layer;

and a second stage: high-pressure gas is injected, inert (nitrogen) gas enters molten plastic, the unset plastic in the center is pushed to enter a cavity which is not filled yet, the gas flows to a low-pressure area and a high-temperature area of a product along the direction with the minimum resistance, when the gas flows in the handrail, the thick-wall section is hollowed by replacing the molten material, and the replaced material fills the rest part in the handrail and keeps the wall thickness uniform;

and a third stage: after the gas incidence is finished, the gas continuously pushes the plastic melt to flow until the melt is filled in the whole cavity;

a fourth stage: and (3) maintaining the pressure of the gas, wherein the gas continuously compresses the melt under the pressure maintaining state, the part which is short of materials in the handrail is filled, the strength of the handrail is ensured, and the problem of shrinkage or warping of an ejected product is minimized.

Furthermore, the air blowing assembly 5 is communicated with a cavity at the free end of the tail part of the handrail. Specifically, because the intensity requirement of handrail head is than higher, so need fill completely, the utility model discloses a subassembly 5 of blowing gas is the free end that directly pours into the handrail afterbody into, forms a gas injection hole at the handrail afterbody to satisfy the product strength requirement.

Further, the upper die cavity 2 and the lower die cavity 4 both comprise two cavities. Because last die cavity 2 and lower die cavity 4 all include two die cavities, so can two handrails of one shot forming, the production efficiency of product is higher.

Furthermore, the air blowing assembly comprises an air blowing pipe 5 and an air blowing needle 10, the tail end of the air blowing pipe 5 is connected with the air blowing needle 10, the air blowing needle 10 comprises a needle sleeve and a needle tube 9, and the needle tube 9 is fixed in the needle sleeve. Specifically, the air blowing pipe 5 of the utility model is fixedly connected to the air passage of the lower mold core, the end of the air blowing pipe 5 is connected with an air blowing needle 10, and high-pressure nitrogen enters the handrail cavity after being blown into the air blowing needle 10 through the air blowing pipe 5.

Further, the needle cover comprises a thin sleeve part 6 and a thick sleeve part 7, the thin sleeve part 6 is connected with a sealing ring 8, the air passage comprises an air blowing pipeline and a needle sleeve channel, the needle sleeve channel comprises a thick diameter channel 11 and a thin diameter channel 12, and the thin sleeve part 6 is in interference connection with the thin diameter channel. The utility model discloses a needle cover of air blow needle includes thin cover portion 6 and thick cover portion 7, and the air flue comprises needle pipeline and needle cover way, and wherein the needle cover way includes that thick footpath says 11 and thin footpath way 12, and the thin cover portion 6 interference of needle cover is connected in the thin footpath that the needle was said and is said 12, is fixed with a sealing ring 8 on the step between thin cover portion 6 and thick cover portion 7, prevents when the air flue pours into high-pressure gas into, and gaseous edge from the air flue hole overflows.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims

1. The utility model provides a fashioned handrail mould core is assisted to gas for mould which characterized in that includes:

the cooling device comprises an upper die core, a plurality of cooling runners are arranged in the upper die core, cooling pipes are fixed in the cooling runners, an upper die cavity is arranged on the upper die core, and a pouring channel of the upper die core is communicated with the upper die cavity;

2. The mold core for a gas-assisted handrail mold according to claim 1, wherein the blowing assembly is in communication with the cavity at the free end of the tail portion of the handrail.

3. The core for a gas assist molded handrail mold of claim 2, wherein the upper mold cavity and the lower mold cavity each comprise two cavities.

4. The mold core for the gas-assisted forming handrail mold according to claim 3, wherein the blowing component comprises a blowing pipe and a blowing needle, the end of the blowing pipe is connected with the blowing needle, the blowing needle comprises a needle sleeve and a needle tube, and the needle tube is fixed in the needle sleeve.

5. The mold core for a gas-assisted forming handrail mold according to claim 4, wherein the needle sleeve comprises a thin sleeve part and a thick sleeve part, the thin sleeve part is connected with a sealing ring, the air channel comprises an air blowing pipeline and a needle sleeve channel, the needle sleeve channel comprises a thick diameter channel and a thin diameter channel, and the thin sleeve part is connected in the thin diameter channel in an interference manner.