A mold insert and an injection mold

Abstract

This invention provides a mold insert and an injection mold. The mold insert includes an insert body and an elastic element. A mounting groove is provided on the peripheral side of one end of the insert body. The elastic element is embedded in the mounting groove and extends back and forth along the length and depth of the mounting groove. A first bend is formed at the bend of the elastic element near the opening of the mounting groove, extending out of the mounting groove. When a metal insert is fitted onto the end of the insert body with the mounting groove, the first bend elastically abuts against the inner wall of the metal insert. This invention embeds a wavy elastic element in the mounting groove of the insert body, with the first bend extending out of the mounting groove. When the metal insert is fitted onto the end of the insert body with the elastic element, the first bend provides contact and positioning for the metal insert, thereby ensuring that the metal insert does not fall off the insert body during injection molding and mold closing.

Description

Technical Field

[0001] The present invention relates to the field of injection molding technology, and in particular to a mold insert and an injection mold. Background Technology

[0002] In the field of new energy vehicles, more and more functional components are being injection molded by inserting metal inserts into plastic molds. The traditional way to position the metal rolled / busher inserts and the plastic mold is to have a metal insert fitted onto a mold insert pin. Due to the machining tolerance of the metal insert, the metal insert is loose when it is fitted onto the mold insert pin. As a result, the metal insert is prone to falling off during the injection molding and mold closing process due to vibration, which can lead to defective products or even damage to the injection mold, resulting in huge waste. Summary of the Invention

[0003] The purpose of this invention is to provide a mold insert and an injection mold, which aims to solve the problem that existing metal inserts are prone to falling off when installed in the mold insert, thereby causing damage to the injection mold.

[0004] To solve the above-mentioned technical problems, embodiments of the present invention provide a mold insert pin, comprising:

[0005] The pin body has a mounting groove on one side of its peripheral surface.

[0006] An elastic element is embedded in the mounting groove. The elastic element extends back and forth along the length direction and depth direction of the mounting groove. A first bending portion is formed at the bending point of the elastic element near the opening of the mounting groove. The first bending portion extends out of the mounting groove from the opening of the mounting groove.

[0007] When the metal insert is fitted onto the end of the pin body that has the mounting groove, the first bent portion elastically abuts against the inner sidewall of the metal insert.

[0008] Preferably, in the mold insert, the bend of the elastic element forming the first bend is provided with an arc-shaped transition.

[0009] Preferably, in the mold insert, the elastic element is arranged in a W shape.

[0010] Preferably, in the mold insert, the elastic element forms a first bent portion.

[0011] Preferably, in the mold insert, both ends of the elastic element in the extension direction of the elastic element are located within the mounting groove.

[0012] Preferably, in the mold insert, the two ends of the elastic element in the extension direction of the elastic element respectively abut against the two sidewalls of the mounting groove in the length direction of the mounting groove.

[0013] Preferably, in the mold insert, the mounting groove has a first groove sidewall and a second groove sidewall opposite to each other in the length direction of the mounting groove. The elastic member is provided with a first elastic arm and a second elastic arm at both ends in the extension direction of the elastic member. One end of the first elastic arm abuts against the first groove sidewall, and the first elastic arm is inclined toward the groove opening or the groove bottom in the direction away from the first groove sidewall. One end of the second elastic arm abuts against the second groove sidewall, and the second elastic arm is inclined toward the groove opening or the groove bottom in the direction away from the second groove sidewall.

[0014] Preferably, in the mold insert, the elastic element forms a second bend near the bottom of the mounting groove, and the second bend abuts against the bottom wall of the mounting groove.

[0015] Preferably, in the mold insert, a plurality of mounting grooves are provided at intervals along the circumference of the insert body, and an elastic element is embedded in each mounting groove.

[0016] Preferably, in the mold insert, the mounting groove is arranged to extend axially along the insert body.

[0017] Preferably, in the mold insert, two mounting grooves are symmetrically arranged on the insert body, and a connecting hole is provided inside the insert body. The connecting hole is located between the two mounting grooves, and the bottoms of the two mounting grooves are connected through the connecting hole. An abutment limiting member is embedded in the connecting hole.

[0018] The two elastic elements are respectively embedded in the two mounting grooves, and the two elastic elements respectively abut against the abutment limiting member on both sides in the depth direction of the mounting groove.

[0019] To achieve the above objectives, the present invention also provides an injection mold including the mold insert described above.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The present invention has a wave-shaped elastic element embedded in the mounting groove of the insert body. The first bent part of the elastic element extends out of the mounting groove. When the metal insert is fitted on the end of the insert body where the elastic element is embedded, the first bent part contacts and positions the metal insert, thereby ensuring that the metal insert will not fall off the insert body during the injection molding process. The mold insert adopts a structural design that can prevent the metal insert from falling off, and the test has verified that it is reliable and feasible. Attached Figure Description

[0022] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0023] Figure 1 This is a schematic diagram of the structure of the mold insert and metal insert assembly in an embodiment of the present invention;

[0024] Figure 2 for Figure 1 A cross-sectional view of the assembly of the die insert and metal insert;

[0025] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0026] Figure 4 for Figure 1 Schematic diagram of the structure of the insert pin in the middle mold;

[0027] Figure 5 for Figure 4 A schematic diagram of the structure of the insert pin after removing the main body of the insert pin.

[0028] Explanation of reference numerals in the accompanying drawings of this invention:

[0029] Mold insert 100, insert body 1, mounting groove 11, first groove sidewall 111, second groove sidewall 112, connecting hole 12, annular abutment surface 13, elastic element 2, first bending part 21, first elastic arm 22, second elastic arm 23, second bending part 24, abutment limiting element 3, metal insert 200.

[0030] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0032] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0033] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0034] To prevent metal inserts from falling off during the injection molding process, this invention provides a mold insert pin that can be applied to injection molded products with metal inserts containing rolled / busher inserts. Figures 1 to 5 A preferred embodiment of the mold insert provided by the present invention is shown.

[0035] Please see Figures 1 to 5 In this embodiment, the mold insert 100 includes an insert body 1 and an elastic member 2. An installation groove 11 is provided on the peripheral side of one end of the insert body 1. The elastic member 2 is embedded in the installation groove 11. The elastic member 2 is arranged to bend back and forth along the length direction and the depth direction of the installation groove 11. The bend of the elastic member 2 near the groove opening of the installation groove 11 forms a first bend portion 21. The first bend portion 21 extends from the groove opening of the installation groove 11 to the outside of the installation groove 11. When the metal insert 200 is sleeved on the end of the insert body 1 where the installation groove 11 is provided, the first bend portion 21 elastically abuts against the inner sidewall of the metal insert 200.

[0036] Specifically, the material of the insert body 1 can be metal, etc., that is, the insert body 1 can be a metal insert. One end of the insert body 1 is usually set on the upper or lower mold of the injection mold. The following description uses the example of the insert body 1 being set on the lower mold of the injection mold. The axis of the insert body 1 is vertical, and the lower end of the insert body 1 is set on the lower mold of the injection mold. The metal insert 200 can be fitted onto the upper end of the insert body 1 from directly above. The shape of the upper end of the insert body 1 and the shape of the metal insert 200 are usually adapted to each other. For example, please refer to... Figures 1 to 5 In this embodiment, the upper end of the pin body 1 is cylindrical, while the metal insert 200 is cylindrical.

[0037] During the injection molding process of the injection molded product, the metal insert 200 is first fitted onto the upper end of the insert body 1, and then injection molding is performed. At this time, the outer wall of the metal insert 200 is covered by the injection molding material to form a plastic part (not shown in the figure) on the outside of the metal insert 200. The outer wall of the metal insert 200 is tightly bonded to the plastic part, thereby forming the metal insert injection molded product.

[0038] A mounting groove 11 is provided on the circumferential side of the upper end of the pin insert body 1. The extending direction of the mounting groove 11 (i.e., the length direction of the mounting groove 11) can be the axial direction of the pin insert body 1, the circumferential direction of the pin insert body 1, a direction inclined at a certain angle relative to the axial direction of the pin insert body 1, or a direction inclined at a certain angle relative to the circumferential direction of the pin insert body 1. Optionally, please refer to Figures 1 to 5 In this embodiment, the mounting groove 11 extends along the axial direction of the pin insert body 1, that is, the length direction of the mounting groove 11 is vertical, and the depth direction of the mounting groove 11 is usually radial to the pin insert body 1. The following description will take the case where the length direction of the mounting groove 11 is vertical and the depth direction of the mounting groove 11 is radial to the pin insert body 1 as an example.

[0039] An elastic element 2 is embedded in the mounting groove 11 of the pin body 1. The elastic element 2 is formed by bending a metal or other elastic material back and forth along the length and depth of the mounting groove 11. For example, the elastic element 2 can be formed by bending a metal wire or metal sheet back and forth along the length and depth of the mounting groove 11. The elastic element 2, which bends back and forth along the length and depth of the mounting groove 11, is generally arranged in a wavy shape, and the wavy elastic element 2 has one or more bends. When the elastic element 2 has one bend, the elastic element 2 is arranged in a V-shape, and the one bend of the elastic element 2 forms the first bend portion 21. When the elastic element 2 has multiple bends, the bends of the elastic element 2 closest to the opening of the mounting groove 11 are the crests of the elastic element 2, and the bends of the elastic element 2 closest to the opening of the mounting groove 11 are the troughs of the elastic element 2.

[0040] The elastic element 2 may have one or more crests. When the elastic element 2 has one crest, that crest extends beyond the mounting groove 11 to form a first bend 21. When the elastic element 2 has multiple crests, all crests may extend beyond the mounting groove 11 to form multiple first bends 21; alternatively, only some crests may extend beyond the mounting groove 11 to form first bends 21, while the remaining crests remain within the mounting groove 11. Optionally, please refer to... Figures 1 to 5 In this embodiment, the elastic member 2 has a first bend 21, that is, the elastic member 2 has only one crest extending out of the mounting groove 11.

[0041] The elastic element 2 is arranged in a wave-like shape, and the specific number of crests and troughs in the elastic element 2 can be set according to the actual situation. Optionally, please refer to Figures 1 to 5 In this embodiment, the elastic member 2 is W-shaped. The W-shaped elastic member 2 has three bends. When the W-shaped elastic member 2 is installed upright in the mounting groove 11, the three bends of the elastic member 2 form one peak and two troughs, respectively. When the W-shaped elastic member 2 is installed upside down in the mounting groove 11, the three bends of the elastic member 2 form two peaks and one trough, respectively. The following description will take the case where the elastic member 2 is W-shaped and installed upright in the mounting groove 11 as an example. In this case, the elastic member 2 forms a first bend 21.

[0042] During the process of fitting the metal insert 200 onto the upper end of the insert body 1, the inner wall of the metal insert 200 will abut against the first bent portion 21 of the elastic member 2, causing the first bent portion 21 to deform toward the bottom of the mounting groove 11. After the metal insert 200 is installed in place, the deformed first bent portion 21 will elastically abut against the inner wall of the metal insert 200, thereby achieving contact positioning of the metal insert 200 through the first bent portion 21, so as to ensure that the metal insert 200 will not fall off the insert body 1 during the injection molding process.

[0043] The present invention has a wave-shaped elastic element 2 embedded in the mounting groove 11 of the insert body 1. The first bending part 21 of the elastic element 2 extends out of the mounting groove 11. When the metal insert 200 is fitted on the end of the insert body 1 where the elastic element 2 is embedded, the first bending part 21 contacts and positions the metal insert 200, thereby ensuring that the metal insert 200 will not fall off the insert body 1 during the injection molding process. The mold insert 100 adopts a structural design that can prevent the metal insert 200 from falling off. The design has been tested and verified to be reliable and feasible.

[0044] Optionally, please refer to Figures 1 to 5 In this embodiment, the bend of the first bending portion 21 formed by the elastic member 2 is provided in an arc shape. The first bending portion 21 is set in an arc shape, and the protruding direction of the first bending portion 21 is the direction away from the bottom of the mounting groove 11. In this way, when the metal insert 200 is installed downward and contacts the first bending portion 21, the metal insert 200 can be fitted onto the upper end of the pin body 1 with less effort.

[0045] The pin body 1 may be provided with one or more elastic elements 2. Optionally, please refer to Figures 1 to 5 In this embodiment, a plurality of mounting grooves 11 are provided at intervals along the circumference of the pin body 1, and an elastic member 2 is embedded in each mounting groove 11. In this way, the metal insert 200 is contacted and positioned by a plurality of elastic members 2, which helps to ensure the coaxiality between the metal insert 200 and the pin body 1.

[0046] Further, please refer to Figures 1 to 5 In this embodiment, two mounting grooves 11 are symmetrically arranged on the pin body 1, and two elastic members 2 are respectively embedded in the two mounting grooves 11.

[0047] Specifically, the two mounting slots 11 are arranged correspondingly about the central axis of the insert body 1, and the included angle between the two mounting slots 11 is 180°. Two elastic elements 2 are provided, and the two elastic elements 2 are respectively embedded in the two mounting slots 11. In this way, the metal insert 200 is positioned by contacting the two elastic elements 2, which not only helps to ensure the coaxiality between the metal insert 200 and the insert body 1, but also makes the structure of the mold insert 100 simpler. The following will be introduced with the example of the insert body 1 having two mounting slots 11 and two elastic elements 2.

[0048] Both ends of the elastic element 2 in the extension direction of the elastic element 2 can be located inside the mounting groove 11; both ends of the elastic element 2 in the extension direction of the elastic element 2 can also be located outside the mounting groove 11; one end of the elastic element 2 in the extension direction of the elastic element 2 can also be located outside the mounting groove 11 and the other end is located inside the mounting groove 11.

[0049] Optionally, please refer to Figures 1 to 5 In this embodiment, both ends of the elastic member 2 in its extending direction are located within the mounting groove 11. This avoids the problem of the elastic member 2's ends extending outside the mounting groove 11, interfering with the installation of the metal insert 200, and thus increasing the difficulty of installing the metal insert 200.

[0050] Optionally, please refer to Figures 1 to 5 In this embodiment, the two ends of the elastic member 2 in the extension direction of the elastic member 2 respectively abut against the two sidewalls of the mounting groove 11 in the length direction of the mounting groove 11.

[0051] Specifically, the two ends of the elastic element 2 abut against the upper and lower side walls of the mounting groove 11, respectively, so as to achieve the installation and positioning of the elastic element 2 in the vertical direction.

[0052] Further, please refer to Figures 1 to 5 In this embodiment, the mounting groove 11 has a first groove sidewall 111 and a second groove sidewall 112 that are opposite each other in the length direction of the mounting groove 11. The elastic member 2 is provided with a first elastic arm 22 and a second elastic arm 23 at both ends in the extension direction of the elastic member 2. One end of the first elastic arm 22 abuts against the first groove sidewall 111 and the first elastic arm 22 is inclined toward the groove opening or the bottom of the mounting groove 11 in the direction away from the first groove sidewall 111. One end of the second elastic arm 23 abuts against the second groove sidewall 112 and the second elastic arm 23 is inclined toward the groove opening or the bottom of the mounting groove 11 in the direction away from the second groove sidewall 112.

[0053] Specifically, the first groove sidewall 111 is the upper groove sidewall of the mounting groove 11, while the second groove sidewall 112 is the lower groove sidewall of the mounting groove 11. The first elastic arm 22 and the second elastic arm 23 are located inside the mounting groove 11. When the W-shaped elastic element 2 is installed upright in the mounting groove 11, the first elastic arm 22 is inclined downwards towards the bottom of the mounting groove 11, and the second elastic arm 23 is inclined upwards towards the bottom of the mounting groove 11. When the W-shaped elastic element 2 is installed upside down in the mounting groove 11, the first elastic arm 22 is inclined downwards towards the opening of the mounting groove 11, and the second elastic arm 23 is inclined upwards towards the opening of the mounting groove 11.

[0054] When the elastic element 2 is installed in the mounting groove 11, the first elastic arm 22 elastically abuts against the lower side of the first groove sidewall 111, while the second elastic arm 23 elastically abuts against the upper side of the second groove sidewall 112, thus fixing the elastic element 2 in the mounting groove 11.

[0055] Optionally, please refer to Figures 1 to 5 In this embodiment, the second bend 24 is formed at the bend of the elastic member 2 near the bottom of the mounting groove 11, and the second bend 24 abuts against the bottom wall of the mounting groove 11.

[0056] Specifically, a second bend 24 is formed at the trough of the elastic member 2, and the bend (i.e., the trough) at which the elastic member 2 forms the second bend 24 is usually also arc-shaped. When the elastic member 2 is installed into the mounting groove 11, the second bend 24 abuts against the bottom wall of the mounting groove 11, thus enabling the elastic member 2 to be installed and positioned in the depth direction of the mounting groove 11.

[0057] As described above, the pin holder body 1 has two symmetrically arranged mounting slots 11, the bottoms of which may or may not be connected. Optionally, please refer to... Figures 1 to 5 In this embodiment, the main body 1 of the pin is provided with a connecting hole 12, which is located between two mounting grooves 11. The bottoms of the two mounting grooves 11 are connected through the connecting hole 12. The connecting hole 12 is embedded with an abutting limiting member 3. Two elastic members 2 abut against the abutting limiting member 3 on both sides in the depth direction of the mounting groove 11.

[0058] Specifically, the shape of the connecting hole 12 is adapted to the shape of the mounting groove 11, and the connecting hole 12 penetrates the bottom wall of the two mounting grooves 11, so that the bottoms of the two mounting grooves 11 are connected through the connecting hole 12. The shape of the abutting limiting member 3 is adapted to the shape of the connecting hole 12, and the abutting limiting member 3 is fixed to the connecting hole 12 by embedding. The elastic members 2 at both mounting grooves 11 abut against the abutting limiting member 3, thus the abutting limiting member 3 forms the bottom wall of the two mounting grooves 11. In this way, a through groove can be processed on the pin insert body 1, which is the combination of the two mounting grooves 11 and the connecting hole 12, thereby reducing the processing difficulty of processing the two mounting grooves 11 on the pin insert body 1.

[0059] Optionally, please refer to Figures 1 to 5 In this embodiment, the pin body 1 and the metal insert 200 are in a clearance fit.

[0060] Specifically, the upper end of the pin body 1 and the metal insert 200 are in a clearance fit, meaning the diameter of the upper end of the pin body 1 is slightly smaller than the inner diameter of the metal insert 200. This results in a gap between the peripheral side surface of the upper end of the pin body 1 and the inner sidewall of the metal insert 200, preventing them from contacting each other. The gap between the upper end of the pin body 1 and the metal insert 200 can be appropriately enlarged. The metal insert 200 and the pin body 1 are positioned by the flexibility of the elastic element 2. For example, the gap between the pin body 1 and the metal insert 200 can be increased based on the preset machining tolerance of the metal insert 200.

[0061] Optionally, please refer to Figures 1 to 5 In this embodiment, an annular abutment surface 13 facing the elastic member 2 is formed on the peripheral side of the needle body 1; when the metal insert 200 is sleeved outside the end of the needle body 1 where the mounting groove 11 is provided, the annular abutment surface 13 abuts against one end of the metal insert 200.

[0062] Specifically, an upward-facing annular abutment surface 13 is formed on the peripheral side of the pin body 1, and the annular abutment surface 13 is located below the mounting groove 11. During the assembly process of the metal insert 200 and the pin body 1, the annular abutment surface 13 is used to abut against the lower end face of the metal insert 200 to limit the metal insert 200 in the vertical and upward directions.

[0063] Optionally, please refer to Figures 1 to 5 In this embodiment, the connection between the upper end face of the pin body 1 and the peripheral side face of the pin body 1 is provided with a rounded corner, so that the connection can be prevented from contacting the metal insert 200 during the assembly process of the metal insert 200 and the pin body 1.

[0064] This invention also provides an injection mold that can be used to produce metal insert injection molded products, primarily for metal insert injection molded products with rolled / busher inserts. The injection mold includes a mold insert pin, which, because it employs the technical solution described in the above embodiments, possesses the beneficial effects brought about by the technical solution described in the above embodiments.

[0065] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural transformations made using the contents of the specification and drawings of the present invention under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the scope of patent protection of the present invention.

Claims

1. A mold insert pin, characterized in that, include: The pin body has a mounting groove on one side of its peripheral surface. An elastic element is embedded in the mounting groove. The elastic element is arranged in a wave-like shape, bending back and forth along the length and depth of the mounting groove. A first bend is formed at the bend near the opening of the mounting groove, extending beyond the groove. The two ends of the elastic element in its extension direction abut against two sidewalls of the mounting groove in its length direction. A second bend is formed at the bend near the bottom of the mounting groove, abutting against the bottom wall of the groove. The elastic element is W-shaped, with one first bend and two second bends formed at its three bends. When the metal insert is fitted onto the end of the pin body that has the mounting groove, the first bent portion elastically abuts against the inner wall of the metal insert. The pin body is symmetrically provided with two mounting grooves, and the pin body is provided with a connecting hole. The connecting hole is located between the two mounting grooves, and the bottoms of the two mounting grooves are connected through the connecting hole. An abutment limiting member is embedded in the connecting hole. Two elastic members are respectively embedded in the two mounting grooves, and the two elastic members abut against the abutment limiting member on both sides in the depth direction of the mounting groove.

2. The mold insert as described in claim 1, characterized in that, The bend in the elastic element forming the first bend is provided with an arc-shaped transition.

3. The mold insert as described in claim 1, characterized in that, Both ends of the elastic element in the extension direction of the elastic element are located within the mounting groove.

4. The mold insert as described in claim 1, characterized in that, The mounting groove has a first groove sidewall and a second groove sidewall opposite to each other in the length direction of the mounting groove. The elastic member has a first elastic arm and a second elastic arm respectively provided at both ends in the extension direction of the elastic member. One end of the first elastic arm abuts against the first groove sidewall. The first elastic arm is inclined towards the groove opening or the groove bottom in the direction away from the first groove sidewall. One end of the second elastic arm abuts against the second groove sidewall. The second elastic arm is inclined towards the groove opening or the groove bottom in the direction away from the second groove sidewall.

5. The mold insert as described in claim 1, characterized in that, The pin body has a plurality of mounting grooves spaced apart along its circumference, and each mounting groove is fitted with an elastic element; and / or, The mounting groove is provided to extend along the axial direction of the pin body.

6. An injection mold, characterized in that, Includes the mold insert as described in any one of claims 1-5.

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