CN221271890U - Glue feeding structure for injection mold - Google Patents
Glue feeding structure for injection mold Download PDFInfo
- Publication number
- CN221271890U CN221271890U CN202323216965.8U CN202323216965U CN221271890U CN 221271890 U CN221271890 U CN 221271890U CN 202323216965 U CN202323216965 U CN 202323216965U CN 221271890 U CN221271890 U CN 221271890U
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- Prior art keywords
- hot
- die
- hot runner
- cavity
- nozzle
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- 239000003292 glue Substances 0.000 title claims abstract description 24
- 238000002347 injection Methods 0.000 title claims abstract description 15
- 239000007924 injection Substances 0.000 title claims abstract description 15
- 239000000084 colloidal system Substances 0.000 claims abstract description 24
- 238000001746 injection moulding Methods 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000002425 crystallisation Methods 0.000 abstract description 3
- 230000008025 crystallization Effects 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 230000002087 whitening effect Effects 0.000 abstract description 3
- 238000007789 sealing Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005491 wire drawing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The utility model discloses a glue feeding structure for an injection mold, which comprises a cold mold, a hot mold and a gate valve assembly; the cold die and the hot die are arranged oppositely, a cavity is formed after the cold die and the hot die are assembled, a hot runner is arranged in the hot die and communicated with the cavity, and colloid in a molten state is injected into the cavity through the hot runner; the gate valve assembly is arranged on the hot die and positioned on one side of the hot runner, and is used for cutting off the circulation of the molten colloid in the hot runner. The gate valve assembly is used for replacing the traditional needle valve, so that the problems of crystallization, whitening, caking and entering of stress line molten colloid into a cavity caused by the traditional needle valve can be avoided, and the appearance quality of a product is improved; and the hot runner is not blocked by a needle valve, so that molten rubber can quickly flow into the cavity, the injection molding time is shortened, and the production period is prolonged.
Description
Technical Field
The utility model relates to the technical field of manufacturing of PET bottle blanks, in particular to a glue feeding structure for an injection mold.
Background
At present, the most common production of PET by using a needle valve mould in the industry, and in the injection molding process of an injection molding machine, heated PET plastic flows into a runner plate in a molten state and is transferred into a reducing seat with a valve needle, and the needle valve mould has several defects in the use process:
The first point is that the surface of the valve needle is in direct contact with the molten colloid in the flow channel, the temperature of the valve needle is not high, when the molten colloid is in primary contact with the surface of the valve needle, part of the colloid is blocked when encountering cold to cause layering, stress lines are also generated until the whole valve needle is subjected to heat transfer and temperature rise, and the temperature is basically consistent with the temperature of the molten colloid; i.e. the quality of the injection molded product in the initial stage is reduced and the rejection rate is increased.
Secondly, when the PET plastic is injected, the valve needle does not participate in heat transfer, and when the valve needle is injected for sealing, a large number of stress lines can appear on the colloid due to overlarge temperature difference between the valve needle and the molten colloid, and the molten PET is blocked by the valve needle before flowing into the heating seat, so that the PET is crystallized, whitened and caked and hardened at low temperature; when the cold materials contacted with the valve needle enter the die cavity of the die together, stress lines appear on the product to influence the appearance quality; when the bottle is blown, the bottle body has one or more stress lines, which affect the appearance quality and lower the qualification rate.
Disclosure of utility model
In order to overcome the defects in the prior art, the utility model aims to provide a glue feeding structure for an injection mold, which can solve the problems generated by the traditional needle valve and improve the quality.
The first technical scheme of the utility model is as follows:
A glue feeding structure for an injection mold comprises a cold mold, a hot mold and a gate valve assembly; the cold die and the hot die are arranged oppositely, a cavity is formed after the cold die and the hot die are assembled, a hot runner is arranged in the hot die, and the hot runner is communicated with the cavity; the gate valve assembly is arranged on the hot die and positioned on one side of the hot runner, and is used for cutting off the circulation of the molten colloid in the hot runner.
As a preferable scheme, the gate valve assembly comprises a cylinder body, a piston and a valve rod, wherein the cylinder body is arranged on the hot die, the piston valve is arranged in the cylinder body in a sliding manner, one end of the valve rod is fixed on the piston, and the other end of the valve rod penetrates through the cylinder body.
Further, the hot die is provided with a through groove, the through groove is communicated with the hot runner, and the valve rod is arranged in the through groove in a sliding manner.
Further, the through groove is perpendicular to the axis of the hot runner.
As a preferable scheme, the hot die comprises a glue passing nozzle, a runner plate, a reducing seat, a nozzle seat and a nozzle, wherein the glue passing nozzle, the runner plate, the reducing seat, the nozzle seat and the nozzle are sequentially communicated to form the hot runner.
Further, the gate valve assembly is disposed between the nozzle and the cavity.
Compared with the prior art, the utility model has the following beneficial effects:
The gate valve assembly is used for replacing the traditional needle valve, so that the problems of crystallization, whitening, caking and entering of stress line molten colloid into a cavity caused by the traditional needle valve can be avoided, and the appearance quality of a product is improved;
and the hot runner is not blocked by a needle valve, so that molten rubber can quickly flow into the cavity, the injection molding time is shortened, and the production period is prolonged.
The needle-free valve in the hot runner is arranged, after injection molding is finished, the surface of the needle-free valve is not contacted with molten colloid, the needle can be sealed rapidly, the influence of the temperature of the molten colloid in the hot runner is avoided, and the problem of water gap wire drawing during needle sealing caused by high temperature of the needle-free valve is solved.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a glue feeding structure according to the present utility model;
FIG. 2 is a state diagram of the glue feeding structure of the present utility model in circulation;
FIG. 3 is a state diagram of the glue feeding structure of the present utility model when cut;
reference numerals illustrate:
1-cooling;
2-hot die; 21-a glue nozzle; 22-runner plate; 23-reducing seats; 24-nozzle seat; 25-pouring nozzle;
a 3-gate valve assembly; 31-cylinder; 32-a piston; 33-valve stem;
201-a cavity; 202-a hot runner; 203-through grooves.
Detailed Description
For a better understanding of the utility model with objects, structures, features, and effects, the utility model will be described further with reference to the drawings and to the detailed description. It should be noted that the features illustrated in the drawings are not necessarily drawn to scale. Furthermore, the described embodiments are some, but not all, embodiments of the utility model. All other embodiments, which can be made by a person skilled in the art without creative efforts, based on the described embodiments of the present utility model fall within the protection scope of the present utility model.
Unless defined otherwise, technical or scientific terms used in this disclosure should be given the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The terms "first," "second," and the like, as used in this disclosure, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", "front", "rear", etc. are used merely to indicate relative positional relationships, which may also change accordingly when the absolute position of the object to be described changes. Furthermore, in the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.
As shown in fig. 1-3, the embodiment provides a glue feeding structure for an injection mold, which comprises a cold mold 1, a hot mold 2 and a gate valve assembly 3;
The cold die 1 and the hot die 2 are oppositely arranged, a cavity 201 is formed after the cold die 1 and the hot die 2 are assembled, a hot runner 202 is arranged in the hot die 2, the hot runner 202 is communicated with the cavity 201, and colloid in a molten state is injected into the cavity 201 through the hot runner 202; the gate valve assembly 3 is disposed on the hot die 2 and located at one side of the hot runner 202, and the gate valve assembly 3 is used for cutting off the flow of the molten colloid in the hot runner 202.
By using the gate valve assembly 3 to replace the traditional needle valve, the problems of crystallization, whitening, caking and stress line molten colloid entering the cavity 201 caused by the traditional needle valve can be avoided, and the appearance quality of the product is improved;
And the hot runner 202 is not blocked by a needle valve, so that molten rubber can flow into the cavity 201 quickly, the injection time is shortened, and the production period is prolonged.
And after injection molding is finished, the needle valve surface is not contacted with molten colloid, so that the needle can be sealed rapidly, the influence of the temperature of the molten colloid in the hot runner 202 is avoided, and the problem of water gap wire drawing during needle sealing caused by high needle valve temperature is solved.
As a preferred solution, the gate valve assembly 3 includes a cylinder 31, a piston 32 and a valve rod 33, the cylinder 31 is disposed on the hot die 2, the piston 32 is slidably disposed in the cylinder 31, and one end of the valve rod 33 is fixed on the piston 32, and the other end passes through the cylinder 31. By the sliding fit of the cylinder 31 and the piston 32, the valve rod 33 is driven to move, so that the valve rod 33 enters the hot runner 202 to intercept the flow of the molten colloid in the hot runner 202.
Further, the hot die 2 is provided with a through groove 203, the through groove 203 is communicated with the hot runner 202, and the valve rod 33 is slidably disposed in the through groove 203.
Preferably, the through groove 203 is perpendicular to the axis of the hot runner 202.
As a preferable scheme, the hot die 2 includes a glue nozzle 21, a runner plate 22, a reducing seat 23, a nozzle seat 24 and a nozzle 25, where the glue nozzle 21, the runner plate 22, the reducing seat 23, the nozzle seat 24 and the nozzle 25 are sequentially communicated to form the hot runner 202. Since the conventional needle valve is replaced with the gate valve assembly 3, the diameter-variable seat 23 is not provided therein with a needle valve.
Preferably, the valve stem 33 is disposed between the nozzle 25 and the cavity 201.
In this embodiment, as shown in fig. 2, after the cold mold 1 and the hot mold 2 are closed, the injection molding machine uses a nozzle to transfer the molten state colloid into the runner plate 22 through the glue nozzle 21, and then the molten state colloid is transferred into the diameter-variable seat 23 without needle valve, at this time, the valve rod 33 of the gate valve is retracted into the through groove 203 to open the hot runner 202, and the molten colloid is rapidly injected into the cavity 201 in the hot runner 202; as shown in fig. 3, after the injection molding of the cavity 201 is completed, the gate valve piston 32 drives the valve rod 33 to advance, and the gate valve piston enters the hot runner 202, so as to block the molten colloid in the hot runner 202 from entering the cavity 201, thereby realizing sealing; the cold mould 1 is opened, and the product is ejected, which is a period.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (6)
1. The glue feeding structure for the injection mold is characterized by comprising a cold mold (1), a hot mold (2) and a gate valve assembly (3); the cold die (1) and the hot die (2) are oppositely arranged, a cavity (201) is formed after the cold die (1) and the hot die (2) are assembled, a hot runner (202) is arranged in the hot die (2), and the hot runner (202) is communicated with the cavity (201); the gate valve assembly (3) is arranged on the hot die (2) and is positioned on one side of the hot runner (202), and the gate valve assembly (3) is used for cutting off the circulation of molten colloid in the hot runner (202).
2. A glue inlet structure for an injection mold according to claim 1, characterized in that the gate valve assembly (3) comprises a cylinder (31), a piston (32) and a valve rod (33), the cylinder (31) is arranged on the hot mold (2), the piston (32) is arranged in the cylinder (31) in a sliding manner, one end of the valve rod (33) is fixed on the piston (32), and the other end passes through the cylinder (31).
3. The glue feeding structure for an injection mold according to claim 2, wherein the hot mold (2) is provided with a through groove (203), the through groove (203) is communicated with the hot runner (202), and the valve rod (33) is slidably arranged in the through groove (203).
4. A glue inlet structure for an injection mold according to claim 3, characterized in that the through slot (203) is perpendicular to the axis of the hot runner (202).
5. The glue feeding structure for an injection mold according to claim 1, wherein the hot mold (2) comprises a glue nozzle (21), a runner plate (22), a reducing seat (23), a nozzle seat (24) and a nozzle (25), and the glue nozzle (21), the runner plate (22), the reducing seat (23), the nozzle seat (24) and the nozzle (25) are sequentially communicated to form the hot runner (202).
6. A glue inlet structure for an injection mould according to claim 5, characterized in that the gate valve assembly (3) is arranged between the nozzle (25) and the mould cavity (201).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323216965.8U CN221271890U (en) | 2023-11-28 | 2023-11-28 | Glue feeding structure for injection mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323216965.8U CN221271890U (en) | 2023-11-28 | 2023-11-28 | Glue feeding structure for injection mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221271890U true CN221271890U (en) | 2024-07-05 |
Family
ID=91694070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323216965.8U Active CN221271890U (en) | 2023-11-28 | 2023-11-28 | Glue feeding structure for injection mold |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221271890U (en) |
-
2023
- 2023-11-28 CN CN202323216965.8U patent/CN221271890U/en active Active
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