CN219727118U

CN219727118U - Heating assembly for EVA injection molding machine

Info

Publication number: CN219727118U
Application number: CN202321157188.1U
Authority: CN
Inventors: 胡吉升; 邱孝林
Original assignee: Full Fame Fujian Shoemaking Machinery Co ltd
Current assignee: Full Fame Fujian Shoemaking Machinery Co ltd
Priority date: 2023-05-15
Filing date: 2023-05-15
Publication date: 2023-09-22
Anticipated expiration: 2033-05-15

Abstract

The utility model discloses a heating component for an EVA injection molding machine, which comprises a mold, wherein the mold comprises an upper mold and a lower mold, a cavity is formed in the parting surface of the upper mold and the parting surface of the lower mold, a preheating runner is formed in the parting surface of the upper mold and the parting surface of the lower mold in a half-to-half way, the upper mold and the lower mold are clamped to form a complete cavity and the preheating runner, the cavity corresponds to the preheating runner one by one, the preheating runner comprises a circulating section surrounding the cavity, an air inlet section communicated with the circulating section and an air outlet section, a plurality of buffer cavities are distributed in the circulating section along the circulating direction, the air inlet section and the air outlet section are respectively provided with an air inlet and an air outlet, and the air inlet and the air outlet are both positioned on the side surface of the mold and are communicated with external air supply equipment, so that circulating circulation is formed among the air inlet section, the circulating section and the air outlet section. The utility model can preheat the upper die and the lower die and keep constant temperature, thus realizing one-time stable molding.

Description

Heating assembly for EVA injection molding machine

Technical Field

The utility model relates to the technical field of EVA injection molding, in particular to a heating component for an EVA injection molding machine.

Background

EVA is formed by copolymerizing ethylene and acetic acid, the application field is quite wide, the annual market consumption of China is continuously increased, the EVA has the advantages of high rebound resilience and tensile strength, high toughness, good shock resistance, buffer performance, heat insulation, heat preservation, cold prevention, excellent low-temperature performance, cold resistance and solarization resistance, airtight cell structure, no water absorption, moisture resistance, good water resistance, seawater, grease, acid, alkali and other chemical corrosion resistance, and the EVA is widely applied to soles and interior decoration materials, and is generally manufactured by adopting a foaming injection molding process.

EVA is used as foaming plastic, and has thermosetting property, namely chemical change is generated after heating, the EVA is gradually hardened and molded, and the EVA is not softened and can not be dissolved after being heated. At present, the injection mold is directly injected into the mold after being heated by an injection molding machine, and because the temperature of the injection mold is low, the heated plastic is not heated uniformly enough in the mold, and the molding quality of the injected plastic is affected, so that a mold assembly which keeps constant temperature and is molded at one time is needed.

Disclosure of Invention

The utility model aims to solve the defects of the technology and designs a heating component for an EVA injection molding machine.

The utility model designs a heating component for an EVA injection molding machine, which comprises a mold, wherein the mold comprises an upper mold and a lower mold, a cavity is formed in the parting surface of the upper mold and the parting surface of the lower mold, a preheating runner is formed in the parting surface of the upper mold and the parting surface of the lower mold in a half way, the upper mold and the lower mold form a complete cavity and the preheating runner after being assembled, the cavity corresponds to the preheating runner one by one, the preheating runner comprises a circulating section surrounding the cavity, an air inlet section and an air outlet section which are communicated with the circulating section, a plurality of buffer cavities are distributed in the circulating section along the circulating direction, the air inlet section and the air outlet section are respectively provided with an air inlet and an air outlet, and the air inlet and the air outlet are positioned on the side surface of the mold and are communicated with external air supply equipment, so that circulating circulation is formed among the air inlet section, the circulating section and the air outlet section.

The utility model has the technical effects that the preheating channel is additionally arranged in the mould, hot air is injected into the preheating channel, the hot air conducts heat to the upper mould and the lower mould, the preheating of the upper mould and the lower mould is realized, and meanwhile, the upper mould and the lower mould are kept at constant temperature by continuously circulating the hot air in the injection molding process, so that the one-time stable forming is realized; the circulation section of the preheating channel surrounds the cavity, and a plurality of buffer cavities are distributed on the circulation section, so that the hot air flowing speed in the circulation section is slowed down by the buffer cavities, and hot air can stay around the cavity to the greatest extent under the condition of unchanged flow, so that the heat conduction efficiency is improved.

Further preferably, when the number of the cavities is two and the cavities are distributed side by side left and right, the air inlet sections of the two cavities are respectively positioned at the left side and the right side of the die, the air outlet sections of the two cavities are positioned between the two cavities and are communicated with each other, the air outlets of the air outlet sections of the two cavities are respectively extended to the front side and the rear side of the die, and the air outlets of the air outlet sections of the two cavities are correspondingly positioned at the front side and the rear side of the die, so that the preheating channels can be uniformly distributed on the parting surface to improve the heating speed of the die.

Preferably, the air inlet and the air outlet are connected with external air supply equipment through interfaces, and the interfaces are positioned on the side face of the upper die, so that the air inlet and the air outlet are conveniently connected with the external air supply equipment, and the production efficiency is improved.

Further preferably, the buffer cavity is spherical, so that the hot gas can rotate in the sphere to buffer the hot gas, and the inner wall of the sphere can not influence the circulation of the hot gas.

Further preferably, a heat conducting layer is arranged on the inner wall of the preheating flow passage to accelerate heat conductivity.

Preferably, the heat conducting layer is copper or copper alloy, and the copper material has good heat conductivity and is a conventional material, so that the heat conducting layer is very suitable for mass production and easy to realize.

Further optimizing, the parting surface edge of the upper die is provided with positioning teeth, and the corresponding part of the lower die is provided with positioning grooves meshed with the positioning teeth to form self-adaptive meshing, so that the upper die and the lower die can be accurately clamped, and the air tightness of the whole preheating channel after the two preheating channels are combined is ensured.

Preferably, the positioning teeth and the positioning grooves are triangular and distributed on one side of the parting surface in a row, so that the positioning teeth and the positioning grooves can be tightly meshed, the meshing is faster, and the firmness after the meshing is better.

Drawings

FIG. 1 is an exploded view of the overall structure of the present utility model;

FIG. 2 is an enlarged view at A in FIG. 1;

fig. 3 is a diagram of the upper mode structure in the present utility model.

In the figure: 1. an upper die; 2. a lower die; 3. a cavity; 4. a parting surface; 5. a circulation section; 6. an air inlet section; 7. an air outlet section; 8. an air inlet; 9. an air outlet; 10. a buffer chamber; 11. an interface; 12. positioning teeth; 13. a positioning groove; 14. avoiding the groove.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the utility model, fall within the scope of protection of the utility model.

In this embodiment, as shown in fig. 1, the mold comprises an upper mold 1 and a lower mold 2, the upper mold 1 and the lower mold 2 are movably connected through a telescopic column, the upper mold 1 can relatively or reversely move relative to the lower mold 2, a cavity 3 is formed in a parting surface 4 of the upper mold 1 and the lower mold 2, the cavity 3 in the upper mold 1 and the lower mold 2 can be symmetrically arranged or asymmetrically arranged, a complete cavity 3 is formed after the upper mold 1 and the lower mold 2 are clamped, a preheating runner is formed in a half-to-half opening in a parting surface 4 of the upper mold 1 and the lower mold 2, and the number of the cavities 3 and the preheating runners are in one-to-one correspondence after the upper mold 1 and the lower mold 2 are clamped.

The preheating runner comprises a circulating section 5, an air inlet section 6 and an air outlet section 7, wherein the three sections are communicated, the circulating section 5 is annular, is close to and is annularly arranged around the cavity 3, the air inlet section 6 is used for air inlet to the circulating section 5, one end of the air inlet section 6 is communicated with the circulating section 5, the other end of the air inlet section is used as an air inlet 8 to be positioned on the side face of the die, the air outlet section 7 is used for conveying hot air coming out of the circulating section 5, one end of the air outlet section 7 is communicated with the circulating section 5, the other end of the air outlet section is used as an air outlet 9 to be positioned on the side face of the die, the positions of the air inlet 8 and the air outlet 9 can be adjusted according to actual working conditions, and the air inlet 8 and the air outlet 9 are connected with external air supply equipment, so that the air inlet section 6, the circulating section 5 and the air outlet section 7 form hot air circulation.

Of course, the preheating channel is filled with high-temperature gas to heat the die, and low-temperature gas can be filled to rapidly cool the die.

The circulation section 5 is uniformly provided with a plurality of buffer cavities 10 along the circulation direction, and the inner diameter size of the buffer cavities 10 is larger than that of the circulation section 5, so that after the hot gas flows through the buffer cavities 10, part of the hot gas can stay in the buffer cavities 10 for a period of time, the heat conduction time of the hot gas is prolonged, the heat conduction efficiency is improved, the heat conduction of the whole circulation section 5 is prolonged, and the rapid heating of the upper die 1 and the lower die 2 is finally realized.

The preheating channel is arranged in half, so that the circulating section 5, the air inlet section 6, the air outlet section 7, the air inlet 8 and the air outlet 9 are all arranged in half, namely in half on the upper die 1 and the lower die 2. It should be noted that, after the upper die 1 and the lower die 2 are assembled, the air outlet 9 and the air inlet 8 which are located in the lower die 2 are both communicated with the interface 11, because the interface 11 is located on the side surface of the lower die 2, as shown in fig. 3, the upper die 1 is provided with the avoiding groove 14 which is embedded with the interface 11 of the lower die 2, after the upper die 1 moves down and is assembled with the lower die 2, the port surfaces of the air outlet 9 and the air inlet 8 which are located in the half of the upper die 1 are abutted against the end surface of the interface 11 to form a combined splice with the other half of the lower die 2 from top to bottom, so as to form the complete air inlet section 6 and the air outlet section 7.

It should be noted that, the preheating channel is designed in half and half, and the parting surface 4 is only required to be grooved, so that the processing is simple and easy to realize, and the maintenance is convenient.

In another embodiment, when the number of the cavities 3 is two and the cavities are distributed side by side left and right, the air inlet sections 6 of the two cavities 3 are respectively located at the left side and the right side of the die, the air outlet sections 7 of the two cavities 3 are located between the two cavities 3 and are mutually communicated, the air outlets 9 of the two cavities extend to the front side and the rear side of the die respectively, when the hot air coming in from the air inlet sections 6 passes through the circulating sections 5, the hot air coming out from the two circulating sections 5 flows from the left side and the right side in opposite directions, flows from the front side and the rear side in a symmetrical manner after being collected, finally is discharged from the air outlets 9, and is extruded in opposite directions after passing through the circulating sections 5, so that the air is discharged quickly, and the preheating channels on the parting surfaces 4 can be uniformly distributed on the parting surfaces 4, thereby facilitating heat conduction, and the heating efficiency of the upper die 1 and the lower die 2 is better.

In another embodiment, the edge of the parting surface 4 of the upper die 1 is provided with positioning teeth 12, the corresponding part of the lower die 2 is provided with a positioning groove 13, and when the upper die 1 and the lower die 2 are clamped, the positioning teeth 12 are meshed in the positioning groove 13 to form a limit, so that the upper die 1 and the lower die 2 are prevented from mutually shifting, the preheating channels of the upper die 1 and the lower die 2 can be accurately matched, and the air tightness of the preheating channels is ensured.

In another embodiment, the positioning teeth 12 and the positioning grooves 13 are triangular saw-tooth shaped and distributed on one side of the parting surface 4 in a row shape, so that the positioning teeth 12 and the positioning grooves 13 can be tightly meshed, the positioning teeth 12 do not need to be completely aligned after moving down to the positioning grooves 13 along with the upper die 1, the positioning teeth 12 can be adaptively meshed with the positioning grooves 13, positioning is realized more quickly by tightly attaching the positioning teeth 12 to one side of the positioning grooves 13, and the upper die 1 and the lower die 2 are fixed more firmly when the positioning teeth 12 are tightly meshed with the positioning grooves 13.

In another embodiment, as shown in fig. 2, the buffer chamber 10 is spherical, and after the hot gas flows through the spherical chamber, the hot gas rotates on two sides of the spherical chamber in the linear flow direction to form a vortex, so that the hot gas can stay in the spherical chamber for a longer time, and the inner wall is spherical, so that the hot gas flows and rotates more smoothly.

In another embodiment, the buffer cavity 10 may be cylindrical in vertical direction, the bottom surface and the top surface of the buffer cavity are respectively located on the lower die 2 and the upper die 1, and are radially cut into halves from the center, and are respectively disposed on the lower die 2 and the upper die 1, and the inner wall of the cylindrical cavity is a smooth arc surface.

In another embodiment, the inner wall of the preheating runner is provided with a heat conducting layer or is sprayed with a heat conducting paint, such as copper or copper alloy, so that the heat conductivity can be effectively improved, the heat conduction speed can be increased, and the injection molding efficiency can be improved.

The present utility model is not limited to the above-mentioned preferred embodiments, and any person who can obtain other various products under the teaching of the present utility model can make any changes in shape or structure, and all the technical solutions that are the same or similar to the present utility model fall within the scope of the present utility model.

Claims

The heating component for the EVA injection molding machine is characterized by comprising a mold, wherein the mold comprises an upper mold (1) and a lower mold (2), a cavity (3) is formed in a parting surface (4) of the upper mold (1) and the lower mold (2), a preheating runner is formed in a half-way on the parting surface (4) of the upper mold (1) and the lower mold (2), the upper mold (1) and the lower mold (2) are assembled to form a complete cavity (3) and a preheating runner, the cavity (3) corresponds to the preheating runner one by one, the preheating runner comprises a circulating section (5) surrounding the cavity (3), an air inlet section (6) communicated with the circulating section (5) and an air outlet section (7), the circulating section (5) is provided with a plurality of buffer cavities (10) along the circulating direction, the air inlet section (6) and the air outlet section (7) are respectively provided with an air inlet (8) and an air outlet (9), and the air inlet (8) and the air outlet (9) are located on the side surface of the mold and are communicated with an external air supply device, so that the circulating section (5) and the circulating section (7) form a circulation section (7).
2. The heating assembly for the EVA injection molding machine according to claim 1, wherein when the number of the cavities (3) is two and the cavities are distributed side by side in a left-right direction, the air inlet sections (6) of the two cavities (3) are respectively located at the left-right side of the mold, and the air outlet sections (7) of the two cavities (3) are located between the two cavities (3) and are mutually communicated, and the air outlets (9) thereof are respectively extended to the front-rear side of the mold.
3. The heating assembly for the EVA injection molding machine according to claim 2, wherein the air inlet (8) and the air outlet (9) are connected with external air supply equipment through an interface (11), and the interface (11) is positioned on the side surface of the upper die (1).
4. The heating assembly for EVA injection molding machine according to claim 1, wherein the buffer cavity (10) is spherical.
5. The heating module for EVA injection molding machine according to any one of claims 1 to 4, wherein the preheating runner inner wall is provided with a heat conductive layer.
6. The EVA injection molding machine heating assembly of claim 5, wherein the thermally conductive layer is copper or copper alloy.
7. The heating assembly for the EVA injection molding machine according to claim 1, wherein positioning teeth (12) are arranged at the edge of the parting surface (4) of the upper die (1), and positioning grooves (13) meshed with the positioning teeth (12) are arranged at the corresponding positions of the lower die (2).
8. The heating assembly for the EVA injection molding machine according to claim 7, wherein the positioning teeth (12) and the positioning grooves are both triangular and distributed on one side of the parting surface (4) in a row.