CN114131832A

CN114131832A - Injection mold for injection molding product with insert

Info

Publication number: CN114131832A
Application number: CN202111456794.9A
Authority: CN
Inventors: 任健; 黄身忠; 柳阳明
Original assignee: Shanghai Fl Dai Ichi Automotive Controllers Co ltd
Current assignee: Shanghai Fl Dai Ichi Automotive Controllers Co ltd
Priority date: 2021-12-01
Filing date: 2021-12-01
Publication date: 2022-03-04
Anticipated expiration: 2041-12-01

Abstract

The invention relates to an injection mold for an injection product with an insert, which comprises a lower mold base, a lower mold core, an upper mold base and an upper mold core, wherein the upper mold core is fixed on the upper mold base, the lower mold core is fixed on the lower mold base, the injection mold also comprises an insert and a positioning and fastening mechanism, the insert comprises a positioning block and an injection molding working block fixedly connected to the positioning block, the injection molding working block is provided with a first cavity part, the insert is provided with a connecting structure for fixing the insert, and the insert is positioned in the first cavity part when being installed and fixed on the connecting structure; the lower die core is provided with a second cavity part, a positioning block of the insert is arranged in the lower die seat, the injection molding working block is positioned in the lower die core, the positioning and fastening mechanism can fix the insert in the lower die seat, and the first cavity part is connected with the second cavity part; and the upper die core is provided with a third cavity part, and the first cavity part, the second cavity part and the third cavity part form an injection molding cavity during die assembly.

Description

Injection mold for injection molding product with insert

Technical Field

The invention relates to the technical field of injection molding, in particular to an injection mold for an injection molding product with an insert.

Background

In the production of automobile wire harness products, injection molding products with inserts are often required to be produced, while in the injection molding process of common injection molding products with inserts, the inserts are required to be placed in a specified position of a mold after mold opening, and then mold closing, injection molding, mold opening and injection molding are carried out, wherein the existing mold has the following defects: 1. the insert is required to be placed after the injection molding is finished and the mold is opened, if the insert is small, a mold has multiple cavities for injection molding at the same time, and the time for placing the insert is long; 2. some precision injection molding needs to keep the constant temperature of a mold cavity, and when an insert is small, a glove is not convenient to hold, and fingers need to be directly used, the high-temperature mold cavity is unsafe to contact with the fingers; 3. in order to make the placement of the insert convenient and stable, the injection molding with the insert is generally completed on a vertical injection molding machine, because the mold opening height of the mold is limited, the placement speed of the insert in a narrow space between an upper mold and a lower mold is not fast, because the edge of the table top of the injection molding machine has a certain distance from the position of the insert placed in the center of the mold cavity of the mold, a person placing the insert needs to lean forward to the body and extend the arm, the working time is long, the labor intensity is high, and the working speed cannot be improved.

Disclosure of Invention

In view of the above-mentioned shortcomings of the prior art, the present invention provides an injection mold for injection products with inserts, which is capable of facilitating the installation of inserts and the removal of injection products, reducing labor intensity, and improving work efficiency and injection quality.

In order to achieve the purpose, the invention provides an injection mold for an injection molding product with an insert, which comprises a lower mold base, a lower mold core, an upper mold base and an upper mold core, wherein the upper mold core is fixed on the upper mold base, the lower mold core is fixed on the lower mold base, the injection mold further comprises an insert and a positioning and fastening mechanism, the insert comprises a positioning block and an injection molding working block fixedly connected to the positioning block, the injection molding working block is provided with a first cavity part, the insert is provided with a connecting structure for fixing the insert, and the insert is positioned in the first cavity part when being installed and fixed on the connecting structure; the lower die core is provided with a second cavity part, a positioning block of the insert is arranged in the lower die seat, the injection molding working block is positioned in the lower die core, the positioning and fastening mechanism can fix the insert in the lower die seat, and the first cavity part is connected with the second cavity part; and the upper die core is provided with a third cavity part, and the first cavity part, the second cavity part and the third cavity part form an injection molding cavity during die assembly.

Furthermore, a vertical pre-positioning groove is formed in the lower die base, and a positioning block of the insert is inserted into the pre-positioning groove.

Furthermore, a first pressing inclined plane is arranged at the upper end of a positioning block of the insert, first guide inclined planes are arranged on two sides of the injection molding working block, the positioning and fastening mechanism comprises a pressing structure arranged on the upper die base and positioned above the first pressing inclined plane and a guide limiting groove arranged in the lower die core, second guide inclined planes are arranged on two sides of the guide limiting groove, and the injection molding working block is positioned in the guide limiting groove; when the upper die base moves downwards, the pressing structure presses against the first pressing inclined plane and can push the insert to move towards the lower die core, when the die is completely closed, the positioning block abuts against the side edge of the lower die core or the lower die base, and the first guide inclined planes on two sides of the injection molding working block are attached to the second guide inclined planes on two sides of the guide limiting groove.

Furthermore, the pressing structure comprises a second pressing inclined plane, and the second pressing inclined plane is pressed and attached to the first pressing inclined plane during die assembly.

Furthermore, the mold insert is provided with a plurality of injection molding working blocks, the lower mold core is provided with a plurality of second cavity parts which are respectively matched with the injection molding working blocks, and the upper mold core is provided with a plurality of third cavity parts which are respectively matched with the injection molding working blocks.

Furthermore, a plurality of lower die cores are arranged in the lower die base.

Further, the mold insert is used for injection molding of an injection molding product with an inner cavity, and the mold insert further comprises an inner cavity forming block located in the injection molding working block and used for forming the inner cavity of the injection molding product during injection molding.

Furthermore, the positioning block and the injection molding working block of the insert are integrated.

Furthermore, a lower die mounting cavity is arranged on the lower die base, and the lower die core is mounted in the lower die mounting cavity

As described above, the injection mold according to the present invention has the following advantageous effects:

through setting up mold insert and location fastening device, during the use, take out the mold insert earlier, with the mold insert fixed mounting on the mold insert outside, inserts simple to operate then puts into the mould together to utilize location fastening device to fix the mold insert. When the die is closed, the second cavity part and the third cavity part form an injection molding cavity, and the insert is positioned in the injection molding cavity; and forming a plastic part in the injection molding cavity during injection molding and wrapping the insert to obtain the injection molding product with the insert. And after the mold is opened, taking out the mold insert and the injection molding product on the mold insert together. And a plurality of inserts can be arranged in the injection mold in a matched manner, and after the injection product is taken out along with the inserts, the other insert provided with the insert can be arranged in the mold for injection molding, so that the utilization rate of the mold is improved. The injection mold disclosed by the invention can be used for installing the insert outside the mold, cooling and demolding the product outside the mold, is convenient to use, can reduce the operation difficulty of personnel, reduce the labor intensity and improve the working efficiency, and can improve the use efficiency of the injection mold and the overall production efficiency.

Drawings

Fig. 1 is a schematic structural view of an injection mold of the present invention.

Fig. 2 is a schematic structural view of the injection mold of the present invention, in which the upper mold base is omitted.

Fig. 3 is a schematic view of the installation of the lower core and insert of the present invention in the lower die base.

FIG. 4 is a schematic view of a lower mold core according to the present invention.

Fig. 5 is a top view of fig. 4.

Fig. 6 is a schematic structural view of the insert of the present invention.

Fig. 7 is a top view of fig. 6.

FIG. 8 is a schematic view of the mating of the lower mold core and the insert of the present invention.

Description of the element reference numerals

1 lower die holder

11 pre-positioning groove

12 lower die mounting cavity

2 lower mold core

21 second cavity part

22 guide limit groove

221 second guide slope

3 mould kernel

4 upper die base

5 insert

51 positioning block

511 first pressure inclined plane

52 injection molding working block

521 first chamber part

522 first guide ramp

53 lumen forming block

6 insert

7 Plastic part

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

It should be understood that the structures, proportions, and dimensions shown in the drawings and described herein are for illustrative purposes only and are not intended to limit the scope of the present invention, which is defined by the claims, but rather by the claims. In addition, the terms such as "upper", "lower", "left", "right" and "middle" used in the present specification are for convenience of description only, and are not intended to limit the scope of the present invention, and changes or modifications of the relative relationship thereof may be regarded as the scope of the present invention without substantial changes in the technical contents.

Referring to fig. 1 to 8, the present invention provides an injection mold for an insert-molded product including an insert 6 and a plastic member 7 wrapping the insert 6. The injection mold comprises a lower mold base 1, a lower mold core 2, an upper mold base 4 and an upper mold core 3, wherein the lower mold core 2 is fixed on the lower mold base 1, the upper mold core 3 is fixed on the upper mold base 4 and moves up and down along with the upper mold base 4 to carry out mold closing and mold opening, the injection mold also comprises an insert 5 and a positioning and fastening mechanism, the insert 5 comprises a positioning block 51 and an injection work block 52 fixedly connected to the positioning block 51, a first cavity part 521 is arranged on the injection work block 52, a connecting structure for fixing an insert 6 is arranged on the insert 5, and the insert 6 is positioned in the first cavity part 521 when being fixedly installed on the connecting structure; the lower die core 2 is provided with a second cavity part 21, a positioning block 51 of the insert 5 is arranged in the lower die base 1, an injection molding working block 52 is positioned in the lower die core 2, the insert 5 can be fixed in the lower die base 1 by a positioning and fastening mechanism, and the first cavity part 521 is connected with the second cavity part 21; the upper mold core 3 is provided with a third cavity part (not shown in the drawing), and when the mold is closed, the first cavity part 521, the second cavity part 21 and the third cavity part form an injection mold cavity for injection molding of the plastic part 7. The connecting structure on the insert 6 may be any suitable structure, such as a socket, a clamping member, a screw hole, etc., and the insert 6 can be fixed on the insert 5 without affecting the injection molding.

The basic working principle of the injection mold provided by the invention is as follows: referring to fig. 1, 2 and 3, when in use, the insert 5 is taken out firstly, and the insert 6 is fixedly arranged on the insert 5 outside the mold, so that the insert 6 is convenient to install, low in labor intensity, safe and reliable; after the insert 6 is mounted on the insert 5, the insert 6 is placed into a mold together, and the insert 5 is fixed by using a positioning and fastening mechanism, wherein a positioning block 51 of the insert 5 is used for mounting and positioning the insert 5, is located outside the lower mold core 2 and does not participate in injection molding, and an injection molding working block 52 extends into the lower mold core 2. When the die is closed, the upper die base 4 drives the upper die core 3 to move downwards to be completely folded with the lower die core 2, at the moment, the first cavity part 521, the second cavity part 21 and the third cavity part form an injection molding cavity, and the insert 6 is positioned in the injection molding cavity; and then, performing injection molding to form a plastic part 7 in the injection molding cavity, wrapping the insert 6 to obtain an injection molding product with the insert 6, after the injection molding is finished, operating to open the mold, and taking out the insert 5 and the injection molding product on the insert 5 together after the mold is opened. And, can form a complete set and set up a plurality of mold inserts 5 in the injection mold, the injection moulding product takes out along with mold insert 5, when external cooling and drawing of patterns, can install another mold insert 5 of installing inserts 6 in the mould simultaneously and mould plastics to improve injection mold's utilization ratio, promote work efficiency.

The injection mold disclosed by the invention can be used for mounting the insert 6 outside the mold, cooling and demolding the product outside the mold, is convenient to use, can reduce the operation difficulty of personnel, reduce the labor intensity, improve the working efficiency, improve the use efficiency of the injection mold and improve the overall production efficiency.

Referring to fig. 1 to 8, the present invention is further illustrated in a specific embodiment as follows:

in this embodiment, referring to fig. 2 and 3, as a preferred design, a vertical pre-positioning groove 11 is provided on the lower die holder 1, and a positioning block 51 of the insert 5 is inserted into the pre-positioning groove 11, specifically, in this embodiment, the positioning block 51 of the insert 5 is substantially square, and the pre-positioning groove 11 is also substantially square, and has a size slightly larger than that of the positioning block 51, when the insert 5 is installed, the insert 5 is vertically placed into the pre-positioning groove 11, which is convenient for operation, and will not interfere with the lower die core 2 and the lower die holder 1 during installation and removal. The pre-positioning groove 11 can restrain the position of the insert 5, plays a role in pre-positioning, and is fixed well through the positioning and fastening mechanism.

In this embodiment, as a preferable design, referring to fig. 6 and 7, the upper end of the positioning block 51 of the insert 5 is provided with a first pressing slope 511, and the two sides of the injection molding working block 52 are provided with first guiding inclined planes 522, the positioning and fastening mechanism comprises a pressing structure (not shown in the figures) arranged on the upper die holder 4 and positioned above the first pressing inclined plane 511, and a guiding and limiting groove 22 arranged in the lower die core 2, referring to fig. 4 and 5, the two sides of the guiding and limiting groove 22 are provided with second guiding inclined planes 221, the rear side port of the guiding and limiting groove 22 extends to the side edge of the lower die core 2, and towards the positioning block 51, the guide limit groove 22 gradually narrows from back to front, the injection molding working block 52 is positioned in the guide limit groove 22, one end of the injection molding working block 52 close to the positioning block 51 is the rear end thereof, and the rear end is wider and the front end is narrower, that is, the distance between the rear ends of the two first pressure-acting slopes 511 is larger and the distance between the front ends is smaller. After the insert 5 is placed in the pre-positioning groove 11, when the upper die base 4 moves downwards, the pressing structure presses against the first pressing inclined surface 511 and can push the insert 5 to move towards the lower die core 2, and the insert 5 is guided to move forwards by the cooperation of the first guiding inclined surface 522 and the second guiding inclined surface 221, when the die is completely closed, the positioning block 51 abuts against the side edge of the lower die core 2 (no blocking wall exists between the pre-positioning groove 11 and the lower die core 2 at this time), and of course, the positioning block 51 can also abut against the lower die base 1 (no blocking wall exists between the pre-positioning groove 11 and the lower die core 2 at this time), so as to realize the positioning and locking of the front and back direction of the insert 5, see fig. 3 and 8, at this time, the first guiding inclined surfaces 522 at both sides of the injection molding work block 52 abut against the second guiding inclined surfaces 221 at both sides of the guiding limiting groove 22, so as to realize the positioning and locking of the left and right direction of the insert 5, thereby fixing and positioning the position of the insert 5, in this case, the first cavity 521 and the second cavity 21 are secured to be in the required fitting and design abutment, and the insert 5 is secured to be stable during injection molding. In this embodiment, the pressing structure may adopt a structure such as a pressing rod and a pressing block, and preferably, the pressing structure includes a second pressing inclined plane, and the second pressing inclined plane presses and adheres to the first pressing inclined plane 511 during mold closing, so that the insert 5 is pushed and pressed effectively. By adopting the positioning and fastening mechanism in the embodiment, the insert 5 can be conveniently and quickly positioned and fixed, stably and reliably by utilizing the pressing power of the upper die base 4 and the matching of the first guide inclined surface 522 and the second guide inclined surface 221. Of course, in other embodiments, the positioning and fastening mechanism may also adopt other existing structures, and the position of the insert 5 can be well positioned and locked without affecting the injection molding.

In the present embodiment, referring to fig. 1, 6 and 7, as a preferred design, a plurality of pre-positioning grooves 11 are provided in the lower die holder 1, a plurality of inserts 5 can be installed, a plurality of injection molding working blocks 52 are provided on the inserts 5, correspondingly, a plurality of second cavity portions 21 and guide limiting grooves 22 are provided on the lower die core 2 for matching with the plurality of injection molding working blocks 52 one by one, and a plurality of third cavity portions are provided on the upper die core 3 for matching with the plurality of injection molding working blocks 52 one by one, so that a plurality of products can be simultaneously injection molded. Wherein, the lower mould benevolence 2 can be the monoblock setting, also can be the setting of piecemeal, and in this embodiment, the lower mould benevolence 2 is two, is equipped with two lower mould installation cavities 12 on the die holder 1, is used for two lower mould benevolence 2 of location installation respectively, can make things convenient for the installation location of lower mould benevolence 2.

For a part of the injection molded product, which will have an internal cavity therein, when the injection molded product has an internal cavity therein, referring to fig. 8, the insert 5 further comprises, as a preferred design, an internal cavity forming block 53 located in the injection work block 52, the internal cavity forming block 53 being located in the first cavity portion 521 and, when closed, being located in the injection mold cavity, the internal cavity forming block 53 being used to form the internal cavity of the injection molded product during injection molding.

In the present embodiment, referring to fig. 1, 6 and 7, as a preferred design, the positioning block 51 and the injection working block 52 of the insert 5 are integrated and integrally manufactured, but in other embodiments, the positioning block 51 and the injection working block 52 may also be separated and fixedly connected by welding or the like, or may also be fixedly connected by a detachable connection. In addition, the cavity forming block 53 may be integrated with the positioning block 51 and the injection working block 52, or may be separately manufactured and then fixedly connected.

In conclusion, the present invention effectively overcomes various disadvantages of the prior art and has high industrial utilization value.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. The utility model provides an injection mold for taking inserts injection moulding product, includes die holder (1), lower mould benevolence (2), upper die base (4) and upper die benevolence (3), upper die benevolence (3) are fixed in upper die base (4), lower die benevolence (2) are fixed in die holder (1), its characterized in that: the mold insert comprises a positioning block (51) and an injection molding working block (52) fixedly connected to the positioning block (51), a first cavity part (521) is arranged on the injection molding working block (52), a connecting structure for fixing the insert (6) is arranged on the mold insert (5), and the insert (6) is positioned in the first cavity part (521) when being installed and fixed on the connecting structure; the lower die core (2) is provided with a second cavity part (21), a positioning block (51) of the insert (5) is installed in the lower die base (1), the injection molding working block (52) is positioned in the lower die core (2), the positioning and fastening mechanism can fix the insert (5) in the lower die base (1), and the first cavity part (521) is connected with the second cavity part (21); and a third cavity part is arranged on the upper die core (3), and when the die is closed, the first cavity part (521), the second cavity part (21) and the third cavity part form an injection molding cavity.

2. An injection mold according to claim 1, characterized in that: the die is characterized in that a vertical pre-positioning groove (11) is formed in the lower die base (1), and a positioning block (51) of the insert (5) is inserted into the pre-positioning groove (11).

3. An injection mould according to claim 1 or 2, characterized in that: the upper end of a positioning block (51) of the insert (5) is provided with a first pressing inclined plane (511), two sides of an injection molding working block (52) are provided with first guide inclined planes (522), the positioning and fastening mechanism comprises a pressing structure which is arranged on an upper die holder (4) and is positioned above the first pressing inclined plane (511), and a guide limiting groove (22) which is arranged in a lower die core (2), two sides of the guide limiting groove (22) are provided with second guide inclined planes (221), and the injection molding working block (52) is positioned in the guide limiting groove (22); when the upper die holder (4) moves downwards, the pressing structure presses against the first pressing inclined plane (511) and can push the insert (5) to move towards the lower die core (2), and when the die is completely closed, the positioning block (51) abuts against the side edge of the lower die core (2) or against the lower die holder (1), and the first guide inclined planes (522) on two sides of the injection molding working block (52) are attached to the second guide inclined planes (221) on two sides of the guide limiting groove (22).

4. An injection mold according to claim 3, characterized in that: the pressing structure comprises a second pressing inclined plane, and the second pressing inclined plane is pressed and attached to the first pressing inclined plane (511) during die assembly.

5. An injection mold according to claim 1, characterized in that: the mold insert (5) is provided with a plurality of injection molding working blocks (52), the lower mold core (2) is provided with a plurality of second cavity parts (21) which are respectively matched with the injection molding working blocks (52), and the upper mold core (3) is provided with a plurality of third cavity parts which are respectively matched with the injection molding working blocks (52).

6. An injection mold according to claim 1, characterized in that: a plurality of lower die cores (2) are arranged in the lower die base (1).

7. An injection mold according to claim 1, characterized in that: for injection molding an injection molded product having an inner cavity, the insert (5) further comprises an inner cavity forming block (53) located in the injection work block (52) for forming the inner cavity of the injection molded product at the time of injection molding.

8. An injection mold according to claim 1, characterized in that: the positioning block (51) and the injection molding working block (52) of the insert (5) are integrated.

9. An injection mold according to claim 1, characterized in that: the lower die is characterized in that a lower die mounting cavity (12) is formed in the lower die base (1), and the lower die core (2) is mounted in the lower die mounting cavity (12).