CN212666574U - Injection mold - Google Patents
Injection mold Download PDFInfo
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- CN212666574U CN212666574U CN202021165621.2U CN202021165621U CN212666574U CN 212666574 U CN212666574 U CN 212666574U CN 202021165621 U CN202021165621 U CN 202021165621U CN 212666574 U CN212666574 U CN 212666574U
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Abstract
The utility model relates to the technical field of mold, specifically an injection mold. The utility model discloses an injection mold includes: a first set of forming dies and a second set of forming dies; the first set of forming die comprises a first spot glue feeding structure and a first product cavity, the first spot glue feeding structure comprises a hot nozzle and a first cold runner, and a molten material with a first color flows into the first product cavity from the hot nozzle through the first cold runner to form a semi-finished product; the second set of forming die comprises a second point glue feeding structure and a second product cavity, the second point glue feeding structure comprises a sprue bushing and a second cold runner, and a molten material of a second color flows into the second product cavity through the second cold runner from the sprue bushing to perform injection molding and encapsulation on the semi-finished product. The mold structure of this application not only can reduce manufacturing cost, can also improve production efficiency.
Description
Technical Field
The utility model relates to the technical field of mold, specifically an injection mold.
Background
Currently, in the production process of injection molded articles, the most widely used is an injection mold. Most of the previous injection molds are produced in a single color or made of materials with single hardness, namely, only one plastic raw material can be used for injection molding, so that the appearance and the color of the product cannot be enriched and diversified, the aesthetic requirement of personnel cannot be met, and the double-color mold can better meet the development trend and can produce multi-color products. However, the current two-color mold usually adopts the hot runner plate for injection molding, and the hot runner plate has high cost, and if the hot runner plate is damaged in production, the replacement procedure is complicated, and the cost is high, so that the two-color mold is not suitable for being applied to a mass production line.
SUMMERY OF THE UTILITY MODEL
To the problem that exists, the utility model aims to provide an injection mold, reduction in production cost.
An injection mold comprising: a first set of forming dies and a second set of forming dies;
the first set of forming die comprises a first spot glue feeding structure and a first product cavity, the first spot glue feeding structure comprises a hot nozzle and a first cold runner, and a molten material with a first color flows into the first product cavity from the hot nozzle through the first cold runner to form a semi-finished product;
the second set of forming die comprises a second point glue feeding structure and a second product cavity, the second point glue feeding structure comprises a sprue bushing and a second cold runner, and a molten material of a second color flows into the second product cavity through the second cold runner from the sprue bushing to perform injection molding and encapsulation on the semi-finished product.
Optionally, the first set of forming dies and the second set of forming dies each include at least two product cavities.
Optionally, the first cold runner and the second cold runner are horn-shaped structures.
Optionally, the ox horn structure includes a trunk runner and at least two feeding branch runners, the feeding branch runners with the product cavity is connected.
Optionally, the feeding branch streams are symmetrically arranged on two sides of the main runner by taking the main runner as a symmetry axis.
Optionally, the feeding branch runner of the horn-shaped structure is of a stepped structure with the cross-sectional area sequentially reduced along the melt flow direction.
Optionally, the main inlet channel of the horn-shaped structure and the inlet branch channel are integrally formed.
Optionally, the length of the feeding branch flow channel is 5-10 mm.
Compared with the prior art, the utility model discloses following beneficial effect has: injection mold includes two sets of forming die, first set of forming die moulds plastics out semi-manufactured goods through hot mouth and first cold runner, carry out the moulding plastics of second colour after that, adopt second set former, go into the purt mouth and the double-colored rubber coating of second cold runner realization first time product of glued structure through the second point, it advances gluey mode to realize double-colored injection molding effect to advance gluey structure replacement current hot runner through new point, not only saved manufacturing cost, still promoted production efficiency.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a perspective view of an injection mold provided in an embodiment of the present invention;
fig. 2 is a schematic view of a cold runner injection cavity provided by the embodiment of the present invention.
[ description of figures ]: panel 1, back mould 2, front mould 3, first cold runner 4, second cold runner 5, product die cavity 6
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the embodiments of the present invention are clearly and completely described with reference to the drawings in the embodiments of the present invention, and obviously, the embodiments described below are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
Example one
The utility model provides an injection mold, please refer to fig. 1-2, in order to clarify the technical scheme and technical purpose of the utility model, product cavity 6 is taken as an example to this embodiment, and this product cavity 6 can be the cavity of floor fan casing nut, combines drawing and detailed implementation to make further introduction to the invention.
The injection mold comprises a first set of forming mold and a second set of forming mold, and the first set of forming mold and the second set of forming mold are arranged on the panel 1. The first set of forming die and the second set of forming die both comprise a front die 3 and a rear die 2, a product cavity 6 for forming a product is formed between the front die 3 and the rear die 2, and the product is formed by opening and closing the front die 3 and the rear die 2.
A first set of forming die is used for the first time of shaping, moulds plastics the molten material of a first colour, and a first set of forming die includes that first point advances glued structure and first product die cavity, and first point advances glued structure and includes hot mouth and first cold runner 4, and the nozzle intercommunication of hot mouth and injection molding machine, molten material flow into first product die cavity, shaping semi-manufactured goods through hot mouth through first cold runner 4. The first glue inlet structure further comprises a first glue outlet, and a hot nozzle is arranged at the first glue outlet.
The second set of forming die is used for the secondary molding to the semi-manufactured goods, and the molten material of the second colour of moulding plastics can be used for carrying out double-colored rubber coating to the semi-manufactured goods, and the second set of forming die includes that the second is some to advance gluey structure, and the second is some to advance gluey structure and is included sprue bushing and second cold runner 5, and the sprue bushing is used for communicating with the nozzle of injection molding machine, and the material of moulding plastics flows into the second product die cavity through second cold runner 5 through the sprue bushing. The second dispensing structure further comprises a second dispensing opening, and a sprue is arranged at the second dispensing opening.
In actual operation, the sprue bushing covers the first glue dispensing opening, so that the influence of waste materials generated in the first cold runner 4 during the first molding on the second molding injection is avoided. Injecting a molten plastic material with a first color from a hot nozzle of a first set of forming die and flowing into a product cavity through a first cold runner 4, cooling the molten material for a period of time after the cavity is filled with the molten material, and opening the die after the product is completely cooled to finish the first forming of the product to form a semi-finished product; then, the rear die 2 of the injection mold is rotated, so that the positions of the rear die 2 of the first set of forming mold and the rear die 2 of the second set of forming mold are exchanged, and then the second cold runner 5 of the second set of forming mold is used for carrying out double-color rubber coating on the semi-finished product formed for the first time, so that the injection molding of the whole double-color product is completed.
Near the hot runner in the double-colored mould at present or the center must be provided with heating ring and heating rod, consequently need purchase these equipment alone, and this application adopts first cold runner 4 and the injection molding of hot runner structure realization double-colored product in the present double-colored injection mold of second cold runner 5 replacement for manufacturing cost obviously reduces, and simultaneously, the total thickness of cancellation hot runner back mould reduces, makes the mould stronger to the adaptability of the double-colored injection molding machine of each model. In addition, first cold runner 4 and second cold runner 5 belong to big mouth of a river formula structure, the slender structure of non-hot runner, therefore the cycle of moulding plastics shortens, and product production efficiency promotes greatly.
In a specific embodiment, the first set of forming mold adopts high-melting point plastic during injection molding, and the second set of forming mold adopts low-melting point plastic during injection molding, so that the problem that the spot-feeding runner of the first forming is melted during the second forming, and the mixed color condition is generated can be avoided.
In this embodiment, the first cold runner 4 and the second cold runner 5 include a trunk runner and at least two branch runners, the first set of forming die and the second set of forming die include two product cavities 6, the pan feeding branch runner of the first cold runner 4 corresponds and is provided with four, in order to improve production efficiency, one set of injection mold can realize once producing two products simultaneously, the mould of one play two that this trade field of technical personnel often say promptly, this mould can improve production efficiency to a certain extent. In other alternative embodiments, the first set of forming dies and the second set of forming dies may contain a plurality of product cavities 6, as required by the actual production, which may achieve a greater number of effects.
In the actual production process, the pressure of plastic materials at the glue opening is large, when the glue opening is separated from a product, the glue opening is cut off irregularly, material scraps are easy to generate and are attached to the surface of a mold, an operator is required to clean the mold frequently, and the production efficiency is greatly influenced. Therefore, the first cold runner 4 and the second cold runner 5 are designed into a horn-shaped structure, the horn-shaped structure comprises a plurality of feeding branch runners, the feeding branch runners are connected with the product cavity 6, the feeding branch runners can play a role in partial pressure, the pressure in each runner is reduced, and therefore the generation of waste scraps is reduced. Optionally, the feeding branch runners may be symmetrically disposed on two sides of the main runner with the main runner as a symmetry axis.
Optionally, the feeding branch flow channel of the horn-shaped structure may be a stepped structure with a cross-sectional area decreasing in sequence along the melt flow direction. The sectional area reduces gradually, can avoid runner size sudden change to cause plastic material's pressure fluctuation great, and the one end that sectional area is minimum is connected with product die cavity 6, is favorable to the product shaping back to glue the mouth and cuts off more easily, reduces the production of waste material. In a specific implementation mode, the main glue inlet flow channel and the feeding branch flow channel of the horn-shaped structure can be integrally formed, and the complexity of the process is reduced.
In an alternative embodiment, the length of the feeding branch flow channel is 5-10mm, the injection molding effect is the best, and preferably, the length of the feeding branch flow channel is 8 mm.
In other embodiments, the first and second glue injection structures are further provided with a cold well for storing cold heads generated during the injection interval in the plastic injection molding mold, and the cold well may be disposed at a cold pocket at the end of the main glue injection runner or the branch feed runner. The cold material well is a structure which prevents cold materials from entering the cavity to affect the quality of the plastic parts and enables the melt materials to be smoothly filled in the cavity. If the cold material is mixed into the cavity, internal stress is easily generated in the injection-molded product, the defective rate of the product is greatly increased, and the product is not favorable for sale.
In order to avoid the plastic molten material after the first molding from entering the second molding through the runner, the quality of the product is influenced, the injection mold adopting the hot runner structure at present must adopt a three-plate mold, so that the runner of the first molding is taken out together with the product after the second injection molding is completed, the structure directly adopts a new point glue inlet structure to improve the quality of the product, and the first cold runner 4 and the second cold runner 5 replace the original hot runner, so that the mold is simple in structure.
To sum up, the injection mold structure of this application not only makes the cost greatly reduced of mould, simultaneously, when maintaining the maintenance, this structure is convenient for operating personnel to dismantle hot mouth and purt mouth, makes things convenient for daily maintenance. In addition, the first cold runner 4 and the second cold runner 5 adopt large water gap runners, so that dead corners do not exist, and daily cleaning is easier than the hot runner structure.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (8)
1. An injection mold, comprising: a first set of forming dies and a second set of forming dies;
the first set of forming die comprises a first spot glue feeding structure and a first product cavity, the first spot glue feeding structure comprises a hot nozzle and a first cold runner, and a molten material with a first color flows into the first product cavity from the hot nozzle through the first cold runner to form a semi-finished product;
the second set of forming die comprises a second point glue feeding structure and a second product cavity, the second point glue feeding structure comprises a sprue bushing and a second cold runner, and a molten material of a second color flows into the second product cavity through the second cold runner from the sprue bushing to perform injection molding and encapsulation on the semi-finished product.
2. An injection mold according to claim 1, wherein the first set of forming molds and the second set of forming molds each comprise at least two product cavities.
3. An injection mold as claimed in claim 2, wherein said first and second cold runners are of a bull horn configuration.
4. An injection mold according to claim 3, wherein the horn configuration comprises a main runner and at least two inlet branch runners, the inlet branch runners being connected to the product cavities.
5. An injection mold as claimed in claim 4, wherein said plurality of branch inlet streams are symmetrically disposed on both sides of said main runner about said main runner axis of symmetry.
6. An injection mold according to claim 4, wherein the inlet branch runner of the horn structure is a stepped structure with a gradually decreasing cross-sectional area along the melt flow direction.
7. An injection mold according to claim 4, wherein the main runner of the horn structure is integrally formed with the branch inlet runner.
8. An injection mold according to claim 4, wherein the length of the inlet branch runner is 5-10 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021165621.2U CN212666574U (en) | 2020-06-22 | 2020-06-22 | Injection mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021165621.2U CN212666574U (en) | 2020-06-22 | 2020-06-22 | Injection mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212666574U true CN212666574U (en) | 2021-03-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021165621.2U Active CN212666574U (en) | 2020-06-22 | 2020-06-22 | Injection mold |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212666574U (en) |
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2020
- 2020-06-22 CN CN202021165621.2U patent/CN212666574U/en active Active
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