CN209794421U

CN209794421U - Injection mold

Info

Publication number: CN209794421U
Application number: CN201920429292.9U
Authority: CN
Inventors: 姚向楠; 秦观涛; 乔鹏杰
Original assignee: Goertek Techology Co Ltd
Current assignee: Goertek Techology Co Ltd
Priority date: 2019-03-29
Filing date: 2019-03-29
Publication date: 2019-12-17
Anticipated expiration: 2029-03-29

Abstract

The utility model relates to an injection mold, which comprises a mold cavity enclosed by a front mold and a rear mold, wherein the rear mold is provided with a positioning structure for positioning an insert, and the front mold is provided with a hot runner; after the die is closed, the end surface of the front die and the end surface of the rear die are matched together, and the whole inner wall of the front die surrounding the die cavity are configured to form a gap with the insert. The utility model discloses an injection mold's a technological effect does, can overcome the problem that pottery is breakable and difficult processing when moulding plastics.

Description

Injection mold

Technical Field

The utility model relates to a mould field of moulding plastics, more specifically especially relates to an injection mold suitable for ceramic inserts.

Background

Ceramic material is little and the hardness is high to the shielding of signal, and polishing effect is good, and the outward appearance is warm and moist like the jade, and more intelligent product now begins to use ceramic as outward appearance spare, and not only beautifully but also wear-resisting, but ceramic material is breakable and difficult processing. The strength problem of the ceramic can be well improved by bonding the plastic and the ceramic together through mould forming, and in addition, the place with a complex structure can be changed into plastic forming, so that the processing amount of the ceramic is reduced.

The mold structure is a two-plate mold, and before mold closing, a ceramic shell after CNC is taken as an insert and placed into a mold cavity of the mold. Since the ceramic material is fragile, the ceramic is easily extruded in the process of die assembly, so that the ceramic is damaged. In addition, after the injection mold is opened, the product is left on the rear mold and sometimes loosened, so that ejection imbalance can be caused during ejection, and further, the product is interfered with the mold, and the ceramic shell is cracked.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an injection mold.

According to one aspect of the utility model, an injection mold is provided, which comprises a mold cavity enclosed by a front mold and a rear mold, wherein the rear mold is provided with a positioning structure for positioning an insert, and the front mold is provided with a hot runner; after the die is closed, the end surface of the front die and the end surface of the rear die are matched together, and the whole inner wall of the front die surrounding the die cavity are configured to form a gap with the insert.

Optionally, a clearance structure for avoiding the insert is arranged on the side wall of the rear mold, which is located outside the insert.

Optionally, the shape of the sidewall of the rear mold provided with the clearance structure is configured to match the shape of the insert.

Optionally, the positioning structure includes a first positioning column and a second positioning column disposed on the rear mold; the first positioning column and the second positioning column are configured to be matched with the first positioning hole and the second positioning hole on the insert.

Optionally, the first positioning post is different in size and/or shape from the second positioning post.

Optionally, the rear mold is further provided with a cold pin extending into the mold cavity; the cold pin is configured to be integrated with an injection molded body that is injected into a mold cavity.

Optionally, the injection mold further comprises a thimble for ejecting the injection product from the rear mold; the cold material needle is configured to move on the rear die synchronously with the ejector pin, and the moving stroke of the cold material needle is smaller than that of the ejector pin.

Optionally, the cold pin is located in a central position of the mold cavity.

Optionally, the cold pin comprises a rod body which is slidably fitted on the rear mold, and a flange which is located at the end of the rod body and is used for combining with the injection molding body.

Optionally, the injection mold further comprises a heating rod disposed on the front mold and the rear mold.

The embodiment of the utility model provides an injection mold, can be very easy combine plastic and pottery together, can obviously improve porcelainous intensity to can overcome the breakable and difficult problem of processing of pottery. In addition, the ceramic insert cannot be extruded in the die assembly process, and the phenomenon of ceramic breakage in the injection molding process can be avoided.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a schematic structural diagram of an injection mold provided by an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a connection relationship between the rear mold and the insert provided by the embodiment of the present invention.

Fig. 3 is a partially enlarged schematic view illustrating an insert fixed in a mold cavity according to an embodiment of the present invention.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be considered a part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

The embodiment of the utility model provides a pair of injection mold, this injection mold is applicable to and carries out injection moulding to the fragile material that hardness is high, the deflection is little. The injection mold can be a ceramic insert injection mold or other injection molds. For the convenience of description, the ceramic insert is taken as an example to describe the structure of the injection mold in detail.

Referring to fig. 1, an embodiment of the present invention provides an injection mold, including a mold cavity 7 enclosed by a front mold 2 and a rear mold 1. The rear mold 1 is provided with a positioning structure for positioning the insert 3, wherein the insert 3 is a ceramic insert, for example, a ceramic housing. Before the mold is closed, the ceramic shell is firstly put into a mold cavity 7 of the injection mold as an insert 3, and the positioning structure can be used for positioning and fixing the ceramic shell so as to facilitate injection molding.

Referring to fig. 3, when the front mold 2 and the rear mold 1 are clamped together, the end surface of the front mold 2 and the end surface of the rear mold 1 are fitted together, and the entire inner wall of the front mold 2 that participates in enclosing the cavity is configured to form a gap 6 with the insert 3. When ceramic is injection molded, since ceramic materials generally have a relatively high hardness and a relatively small amount of deformation, a ceramic case fixed to a positioning structure is very likely to be crushed or broken when the mold is closed. In order to avoid this, the ceramic insert and the inner wall of the cavity of the injection mold are designed to have a certain gap. Wherein, the space can set up many according to demands such as the shape of inserts, the utility model discloses do not do the restriction to this.

The utility model discloses a have hot runner 20 on front mould 2. Before the die assembly, the ceramic shell is firstly placed into a die cavity enclosed by the front die 2 and the rear die 1 as an insert 3, the back of the ceramic shell is provided with a glue inlet hole in advance, and glue can be fed by adopting an open hot runner 20.

And, the utility model discloses an injection mold still is provided with the heating rod respectively on front mould 2 and back mould 1. The temperature of the heating rod can be controlled to 110 ℃ and 150 ℃ respectively at the time of injection molding. It should be noted that the temperature can be flexibly adjusted according to the specific injection molded product, and the utility model discloses do not limit this. Of course, other heating devices known in the art can be used in the injection molding process, and are not limited to the heating rod described above, and the present invention is not limited thereto.

The embodiment of the utility model provides an injection mold, it has the structure fairly simple to and cost of manufacture advantage such as lower. The injection mould is convenient to use, and only a ceramic insert is placed into an injection mould cavity enclosed by the front mould 2 and the rear mould 1 before mould closing is carried out, and the ceramic insert is positioned and fixed through the positioning structure. The ceramic insert can be obtained by machining methods well known in the art, such as CNC, but the present invention is not limited thereto. The embodiment of the utility model provides an injection mold can bond plastic and pottery together to can reach the purpose that improves ceramic strength. Moreover, the part with a complex structure can be changed into plastic molding, so that the processing amount of the ceramic material can be reduced.

Referring to fig. 3, the injection mold of the present invention is further provided with a clearance structure 5 for avoiding the ceramic insert on the sidewall of the rear mold 1 outside the ceramic insert. The unnecessary friction damage of the inner wall of the rear mold and the ceramic insert of the mold in the using process can be effectively avoided, and the ceramic insert can be protected. In addition, when the injection product is demoulded, the interference between the injection product and the side wall of the rear mould 1 can be avoided.

Wherein, in order to ensure that the ceramic insert can be installed in the cavity of the injection mold, the shape of the side wall of the rear mold 1 provided with the clearance structure 5 is configured to match the shape of the ceramic insert. That is, the shape of the clearance structure 5 is related to the shape of the ceramic insert, and in practical applications, may be adjusted according to the shape, size, and the like of the insert.

Referring to fig. 2, the positioning structure of the present invention includes a first positioning column 11 disposed on the rear mold 1, and a second positioning column 12, wherein the first positioning column 11 and the second positioning column 12 are configured as: used for matching with the first positioning hole and the second positioning hole on the ceramic insert. The ceramic insert can be easily fixed on the rear die 1 through the matching of the positioning column and the positioning hole.

The cross-sectional shapes of the first positioning column 11 and the second positioning column 12 may be circular, oval, square, diamond, triangle, etc. which are well known to those skilled in the art, and the present invention is not limited to this, and can be flexibly adjusted according to actual situations. The insert 3 may be provided with a matching positioning hole according to the shape of the first positioning column 11 and the second positioning column 12.

In order to prevent the ceramic insert from being misplaced when being installed in the cavity of the injection mold, the first positioning column 11 and the second positioning column 12 are different in size or/and shape. The design can realize accurate installation of the ceramic insert so as to stably set the ceramic insert in a mold cavity of an injection mold, thereby facilitating subsequent processing.

Referring to fig. 2, the injection mold of the present invention is further provided with a cold needle 13 extending into the mold cavity on the rear mold 1, wherein the cold needle 13 is configured as: in combination with the injection-molded body 4 being injected into the mold cavity. Wherein the injection molded body 4 is made of plastic material.

The utility model discloses a cold burden needle 13's structure does: with reference to fig. 2, it comprises a rod which is a sliding fit on the rear mould 1, and a flange 130 at the end of the rod for joining with the injection moulded body 4. The flange 130 projects into the interior of the injection-molded body 4 and is joined to the connection 40 provided on the injection-molded body 4. The shape of the connecting part 40 is matched with the shape of the end of the cold material needle 13, and the flange 130 can extend into the connecting part 40. Specifically, the method comprises the following steps: the flange 130 and the connecting part 40 are combined together to play a guiding role for the injection molding product, the injection molding product can be fixed when injection molding is performed, after the injection molding is completed, when the injection molding product needs to be demoulded from the rear mold 1, the injection molding product can be stably separated, the injection molding product cannot shake on the rear mold 1, and therefore the occurrence of the cracking condition of the ceramic insert can be effectively avoided.

The flange 130 may have a circular arc shape, a rectangular shape, a square shape, a trapezoidal shape, etc., which are well known in the art, but the present invention is not limited thereto.

Wherein, cold burden needle 13 is located the central point of die cavity and puts, is favorable to stable connection injection moulding product.

Optionally, the injection mold of the present invention further includes an ejector pin (not shown in the figure) for ejecting the injection product from the rear mold 1. At this time, the cold pin 13 is configured to: and the rear die 1 moves synchronously with the ejector pin, and the moving stroke of the cold material needle 13 is smaller than that of the ejector pin. The ejector pin can be used for ejecting the injection molding product out of the rear mold. In the process of ejecting the injection product, the cold material needle 13 is injected into the injection molding body, so that the cold material needle 13 can play a role in guiding the injection product during demolding. And when the injection product is separated from the rear mold 1, the cold pin 13 stops moving, and the ejector pin continuously moves at the moment, so that the cold pin is separated from the injection body, and finally the demolding of the injection product is finished.

Although some specific embodiments of the present invention have been described in detail by way of illustration, it should be understood by those skilled in the art that the above illustration is only for purposes of illustration and is not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. An injection mold, its characterized in that: the insert positioning device comprises a mold cavity defined by a front mold and a rear mold, wherein the rear mold is provided with a positioning structure for positioning an insert, and the front mold is provided with a hot runner; after the die is closed, the end surface of the front die and the end surface of the rear die are matched together, and the whole inner wall of the front die surrounding the die cavity are configured to form a gap with the insert.

2. An injection mold according to claim 1, characterized in that: and a clearance structure for avoiding the insert is arranged on the side wall of the rear die, which is positioned outside the insert.

3. An injection mold according to claim 2, characterized in that: the shape of the side wall provided with the clearance structure on the rear die is configured to be matched with the shape of the insert.

4. An injection mold according to claim 1, characterized in that: the positioning structure comprises a first positioning column and a second positioning column which are arranged on the rear die; the first positioning column and the second positioning column are configured to be matched with the first positioning hole and the second positioning hole on the insert.

5. An injection mold according to claim 4, wherein: the first positioning column is different from the second positioning column in size or/and shape.

6. An injection mold according to claim 1, characterized in that: the rear die is also provided with a cold material needle extending into the die cavity; the cold pin is configured to be integrated with an injection molded body that is injected into a mold cavity.

7. An injection mold according to claim 6, wherein: the ejection mechanism also comprises an ejector pin used for ejecting the injection product out of the rear mold; the cold material needle is configured to move on the rear die synchronously with the ejector pin, and the moving stroke of the cold material needle is smaller than that of the ejector pin.

8. An injection mold according to claim 6, wherein: the cold material needle is positioned in the center of the die cavity.

9. An injection mold according to claim 6, wherein: the cold material needle comprises a rod body which is in sliding fit with the rear die, and a flange which is positioned at the end of the rod body and is used for being combined with the injection molding body.

10. An injection mold according to claim 1, characterized in that: the heating device also comprises heating rods arranged on the front die and the rear die.