CN214491500U - Injection mould - Google Patents

Abstract

The application discloses an injection mold, which comprises a mold body, an exhaust part and a shape following waterway; the die body is provided with a cavity; the exhaust piece is formed in the mould body and communicated with the cavity, an exhaust channel is formed in the mould body, one end of the exhaust channel is communicated with the exhaust piece, and the other end of the exhaust channel is communicated with the outside; the shape following waterway is formed in the die body, and the shape of the shape following waterway is matched with the die cavity and is close to the die cavity. The mould body and the inside exhaust part and the water path in the injection mould are of an integrated structure, the water path is in a form of a following water path, the shape of the water path is adapted to the shape of the cavity, the water path is prepared by adopting an additive manufacturing technology, the cooling and exhaust effects are good, the manufacturing process is simple, the manufacturing period is short, the cost is low, the strength of the mould is not influenced, and the effect is obvious.

Description

Injection mould

Technical Field

The application relates to the field of injection molding, in particular to an injection mold.

Background

For a complex mold, in the prior art, a conformal water channel of the mold and air-permeable steel are separately processed, and an air-permeable steel insert and a water channel structural member are respectively used at a position needing air exhaust and a position needing cooling. However, since the permeable steel is mainly manufactured by the powder metallurgy technology, the permeable steel only has permeability, and the structure is loose; the water channel obtained by machining cannot be adapted to the shape of the cavity, so that the cooling effect is poor, the use requirement cannot be met, and the die has the advantages of long manufacturing period, high manufacturing cost and low production efficiency.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present application provides an injection mold to solve the above problems.

The application provides an injection mold, which comprises a mold body, an exhaust part and a shape following waterway;

the die body is provided with a cavity;

the exhaust piece is formed in the mould body and communicated with the cavity, an exhaust channel is formed in the mould body, one end of the exhaust channel is communicated with the exhaust piece, and the other end of the exhaust channel is communicated with the outside;

the shape following waterway is formed in the die body, and the shape of the shape following waterway is matched with the die cavity and is close to the die cavity.

In some embodiments, the mold comprises a male mold and a female mold which are matched, the male mold and the female mold form the cavity after being matched, the shape following waterway is formed in the male mold and/or the female mold, and the exhaust part is formed in the male mold and/or the female mold.

In some embodiments, the male and/or female dies are integrally formed with the conformal waterway by an additive manufacturing technique.

In some embodiments, the male and/or female dies are integrally formed with the gas permeable steel by additive manufacturing techniques.

In some embodiments, the additive manufacturing technique is integrally formed by means of laser melting.

In some embodiments, the conformal waterway is of a spiral structure and has an inlet and an outlet so as to communicate with the outside to form a circulation loop.

In some embodiments, the vent is made of a gas permeable steel material.

In some embodiments, the exhaust passage is machined by electrical discharge machining.

In some embodiments, the vent is annular.

In some embodiments, the vent is located at an end of the cavity.

The mould body and the inside exhaust part and the water path in the injection mould are of an integrally formed structure, the water path is in a shape following water path form, the shape of the water path is adapted to the shape of the cavity, the water path is prepared by adopting an additive manufacturing technology, the manufacturing process is simple, the cooling and exhausting effects are good, the manufacturing period is short, the cost is low, the strength of the mould is not influenced, and the effect is obvious.

Drawings

Fig. 1 is a schematic perspective view of an injection mold according to an embodiment of the present application.

FIG. 2 is a schematic cross-sectional view of an injection mold taken along line I I-I I according to an embodiment of the present application.

FIG. 3 is a perspective view of an injection mold provided by embodiments of the present application.

Fig. 4 is a cross-sectional view of the male mold shown in fig. 1 taken along the direction IV-IV.

Description of the main elements

Injection mold 100

Die body 10

Die cavity 11

Exhaust passage 12

Mother die 13

Male die 14

Exhaust member 20

Conformal waterway 30

Inlet 31

An outlet 32

The following detailed description will further illustrate the present application in conjunction with the above-described figures.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It will 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 an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, an embodiment of the present application provides an injection mold 100, which can achieve the effects of rapidly exhausting cavity gas during an injection process of the mold and rapidly and uniformly cooling an injection-molded product during a molding process. Not only can overcome various product defects caused by poor exhaust in the injection molding process of products (complicated in deep cavity and the like), but also can shorten the molding period and improve the production efficiency and the product quality, thereby realizing the aims of improving the quality, reducing the cost and improving the efficiency. The method has a good reference function for other projects under development and subsequent newly developed injection molds, and also has a good reference function for the design and manufacture of cooling and lubricating parts of equipment.

Referring to fig. 2, the injection mold 100 includes a mold body 10, an exhaust member 20, and a shape-following waterway 30.

The mold body 10 has a cavity 11. The exhaust member 20 is formed in the mold body 10 and is communicated with the cavity 11, the exhaust channel 12 is further formed in the mold body 10, one end of the exhaust channel 12 is communicated with the exhaust member 20, and the other end of the exhaust channel 12 is communicated with the outside. The shape following waterway 30 is formed in the mold body 10, and the shape of the shape following waterway 30 is adapted to the cavity 11 and is arranged close to the cavity 11. The shape-following waterway 30 is a waterway whose shape is adapted to the shape of the cavity, i.e. the product to be molded, and in this embodiment, the shape of the cavity is a frustum shape whose upper end is small and lower end is large, and the shape enclosed by the shape-following waterway is also a frustum shape whose upper end is small and lower end is large.

The mold body 10 includes a male mold half 14 and a female mold half 13.

The male mold 14 and the female mold 13 are substantially rectangular plate-shaped and fit with each other. The male mold 14 and the female mold 13 are closed to form the cavity 11, that is, a part of the cavity 11 is disposed in the male mold 14, and the other part is disposed in the female mold 13. In the illustrated embodiment, the male mold 14 is provided with the relief water passage 30, the female mold 13 is provided with the relief water passage 30, and the air vent 20 is formed in the male mold 14 and located at an end of the cavity.

It is understood that in other embodiments, the conformal waterway 30 may be formed only in the female mold 13 or the male mold 14.

It is understood that in other embodiments, the vent member 20 may be molded only into the female mold half 13, or both the male mold half 14 and the female mold half 13 may be provided with the vent member 20.

The exhaust passage 12 is machined by means of electric discharge machining.

The electric spark machining means that any conductive material can be machined in a medium which meets a set value through the electric erosion effect of pulse discharge between a tool electrode and a workpiece electrode, the surface of the electric spark machining consists of countless pits and hard convex edges, the hardness of the electric spark machining is higher than that of the machining surface, the electric spark machining is beneficial to protecting lubricating oil, the surface lubricity and the wear resistance of the electric spark machining are better than those of the machining surface under the same surface roughness, and the electric spark machining is particularly suitable for manufacturing a die.

In the present embodiment, the exhaust passage 12 is straight, and it is understood that in other embodiments, the exhaust passage 12 may be L-shaped, wave-shaped or arc-shaped according to the processing requirement.

The male die 14, the female die 13, the air exhaust member 20 and the conformal water channel 30 are integrally formed by an additive manufacturing technology.

It should be noted that the additive manufacturing technology, commonly known as 3D printing, combines computer aided design, material processing and molding technology, and is a manufacturing technology for manufacturing solid objects by stacking dedicated metal materials, non-metal materials and medical biomaterials layer by layer through software and a numerical control system based on a digital model file in manners of extrusion, sintering, melting, photocuring, injection, etc. Through the injection mold of additive manufacturing, can make the shape of water route and the shape of die cavity adapt to at first, the maximum increase radiating efficiency, it is especially obvious to the irregular mould of die cavity. And adopt the mould of vibration material disk, exhaust spare and mould integrated into one piece, the coincidence is inseparable and even between the two each other, does not have stress between its exhaust spare and the mould, has increased the life of mould. The existing structure that the exhaust piece is embedded into the mold after being manufactured has the problems that large stress exists between the exhaust piece and the mold, cracks are easy to generate and the like.

It is understood that in other embodiments, the male mold 14, the vent 20 and the satellite waterway 30 are integrally formed by additive manufacturing techniques, and the female mold 13 is obtained by other processing methods, such as casting and forging.

It is understood that in other embodiments, the female mold 13, the vent 20 and the satellite water path 30 are integrally formed by additive manufacturing technology, and the male mold 14 is obtained by other processing methods, such as casting and forging.

Wherein the additive manufacturing technology is integrally formed by means of laser melting.

It should be noted that laser melting is a main technical approach in the additive manufacturing of metal materials. The technology selects laser as an energy source, scans layer by layer on a metal powder bed layer according to a planned path in a three-dimensional CAD slicing model, achieves the effect of metallurgical bonding by melting and solidifying the scanned metal powder, and finally obtains the metal part designed by the model.

The exhaust member 20 has a ring shape. The exhaust member 20 is located at an end of the cavity 11 and is made of a gas permeable steel material.

It is understood that in other embodiments, the exhaust member 20 may be made of other air-permeable materials, and is not limited thereto, as long as the structure is capable of exhausting air.

Referring to fig. 3, the conformal water channel 30 has a spiral structure and has an inlet 31 and an outlet 32, both of which are linear and are communicated with the outside to form a circulation loop.

In this embodiment, referring to fig. 4, the number of the shape following waterway 30 is two, the cavity 11 is a substantially circular cavity, one of the shape following waterways 30 is disposed in the female mold 13, and the shape following waterway 30 is located outside the cavity; and the other form following waterway 30 is wound in the male die 14 and is positioned at the inner side of the die cavity 11. Specifically, the cavity 11 is in the shape of a frustum with a small upper end and a large lower end, and the shape surrounded by the conformal water channel 30 is also in the shape of a frustum with a small upper end and a large lower end.

It is understood that in other embodiments, the water follower path 30 may be one, or disposed inside the cavity 11, or disposed around the outside of the cavity 11.

It is understood that, in other embodiments, there may be a plurality of the water paths 30, and a plurality of the water paths 30 are disposed around the outer side of the cavity 11.

It is understood that in other embodiments, the shape of the follower waterway 30 may be other shapes, and only needs to be adapted to the shape of the cavity, such as a U shape, and the structure is not limited thereto, as long as the structure can achieve cooling, and is within the scope of the present application.

In the injection molding process of the mold, the polymer material is injected into the cavity 11 of the injection mold 100 through the injection molding machine, and the gas in the cavity 11 enters the exhaust channel 12 through the exhaust member 20, so that the gas in the cavity 11 of the injection mold 100 is exhausted. After injection, injection mold 100 gets into the cooling state, and cooling liquid accomplishes injection mold 100 internal cooling circulation through import 31 and export 32, takes away the heat energy in injection mold 100 part, because the shape of water route is adapted with the shape of die cavity, for following the shape water route, consequently cooling rate is fast and even, and the cooling effect is good.

The mold body 10, the exhaust member 20 inside the mold body, and the conformal water channel 30 in the injection mold 100 are integrally formed, and are manufactured by adopting an additive manufacturing technology, so that the manufacturing process is simple, the manufacturing period is short, the cost is low, the strength of the mold is not affected, and the effect is remarkable.

The injection mold 100, the exhaust part 20 and the conformal waterway 30 can be integrally formed; the density of the parts reaches 99.9 percent, the strength is good, a cooling water path (oil path) has no leakage, and the uniform and quick cooling of the injection molding parts can be met; the manufacturing does not need a die, and the device has the advantages of high efficiency, perfect functions, controllable structure, high precision, strong consistency and low cost.

In addition, other changes may be made by those skilled in the art within the spirit of the application, and such changes are, of course, encompassed within the scope of the invention as claimed.

Claims (10)

1. An injection mold is characterized by comprising a mold body, an exhaust part and a conformal waterway;

the die body is provided with a cavity;

the exhaust piece is formed in the mould body and communicated with the cavity, an exhaust channel is formed in the mould body, one end of the exhaust channel is communicated with the exhaust piece, and the other end of the exhaust channel is communicated with the outside;

the shape following waterway is formed in the die body, and the shape of the shape following waterway is matched with the die cavity and is close to the die cavity.

2. The injection mold of claim 1, wherein the mold body comprises a male mold and a female mold which are matched, the male mold and the female mold form the cavity after being matched, the shape following waterway is formed in the male mold and/or the female mold, and the exhaust member is formed in the male mold and/or the female mold.

3. An injection mould according to claim 2, wherein the male and/or female mould is integrally formed with the shape-following waterway by additive manufacturing.

4. An injection mould according to claim 2, wherein the male and/or female mould part and the venting member are formed integrally by additive manufacturing.

5. The injection mold of claim 1, wherein the conformal waterway is of a spiral structure and has an inlet and an outlet to communicate with the outside to form a circulation loop.

6. The injection mold of claim 1, wherein the cavity is shaped as a frustum with a small upper end and a large lower end, and the shape defined by the water path is also shaped as a frustum with a small upper end and a large lower end.

7. The injection mold of claim 1, wherein the body of the conformal waterway is of a spiral configuration, and the inlet end and the outlet end are both linear.

8. The injection mold of claim 1, wherein the vent is made of a gas permeable steel material.

9. The injection mold of claim 1, wherein the vent is annular.

10. The injection mold of claim 1, wherein the vent is located at an end of the cavity.

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