Reset mechanism for injection mold

Abstract

The reset mechanism comprises a lower mold base, a lower fixed mold is fixedly installed on the upper surface of the lower mold base, positioning holes are formed in the four corners of the outer surface of the lower fixed mold, a first-stage reset spring is fixedly installed at the bottom end of the interior of each positioning hole, and a reset rod is fixedly installed at the top end of each first-stage reset spring. Positioning holes are formed in the upper movable mold and the lower fixed mold, the reset rods are in sliding connection with the positioning holes, a square sliding groove is formed in the position, located on the lower fixed mold, between every two reset rods on the same side, and secondary reset springs are fixedly installed at the four corners of the inner bottom wall of each square sliding groove. The movable mold or the fixed mold is prevented from being collided and damaged in the mold closing process, the service life of the mold is prolonged, the stability is high, the maintenance and use cost of the mold is reduced, the product quality is guaranteed, meanwhile, the elastic jacking reset effect has the auxiliary reset effect, and the auxiliary convenience of mold opening is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection mold technical field, concretely is a kind of reset mechanism for injection mold. BACKGROUND

[0002] Injection mold is a kind of mold for injection molding, mainly used to melt after heating plastic particle injection into mold, and the required shape and size plastic product is formed after cooling. Injection mold plays an important role in industrial production, and is widely used in the fields of automobile, household appliance, electronic communication, daily necessities, etc.;

[0003] The main components of injection mold include mold main body, which is usually made of high-hardness, wear-resistant materials such as steel, aluminum, copper, etc. to ensure the service life of the mold. The injection mold generally includes a movable mold base and a fixed mold base that constitute a mold cavity. During injection, the two mold bases are closed, the raw material enters the mold cavity through the feed hole, and then the two mold bases are separated, and the molded product is taken out from the cavity.

[0004] However, the traditional injection mold has the problem of inconvenient mold opening without auxiliary top reset structure after mold closing and injection, which can easily affect the mold opening quality of the product. At the same time, a large impact force is generated during mold closing, which can easily scratch and damage the mold, increasing the maintenance cost and affecting the injection quality of the product. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a reset mechanism for injection mold to solve the problems raised in the background.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a reset mechanism for injection mold, comprising a lower mold base, a lower fixed mold is fixedly installed on the upper surface of the lower mold base, a positioning hole is formed at the outer surface of the lower fixed mold at four corners, a primary reset spring is fixedly installed at the inner bottom end of each positioning hole, a reset rod is fixedly installed at the top end of the primary reset spring, the reset rod is slidingly connected with the positioning hole, a square sliding groove is formed on the lower fixed mold between the two reset rods on the same side, a secondary reset spring is fixedly installed at the inner bottom wall of the square sliding groove at four corners, a reset convex mold is fixedly installed between the top ends of the four secondary reset springs, the reset convex mold is slidingly connected with the square sliding groove, and an upper movable mold is arranged above the lower fixed mold.

[0007] Preferably, a positioning column is fixedly installed at the lower surface of the upper movable mold at four corners, and the positioning column and the positioning hole are designed in a matching structure.

[0008] Preferably, a square limiting groove matched with the reset convex mold is formed at the lower surface of the upper movable mold.

[0009] Preferably, the lower die cavity is arranged at the center position of the lower surface of the lower fixed die.

[0010] Preferably, the upper die core is fixedly arranged at the center position of the lower surface of the upper movable die.

[0011] Compared with the prior art, the utility model has the beneficial effects that:

[0012] The plurality of first and second reset springs can play a good elastic protection role in the process of pressing the lower movable die to close the mold, have a good elastic buffering protection effect, can effectively avoid rigid collision contact when the upper movable die and the lower fixed die are closed, avoid damage of the movable die or the fixed die caused by collision in the process of closing the mold, prolong the service life of the mold, have high stability, reduce the maintenance and use cost of the mold, and ensure product quality.

[0013] After the injection mold is opened, the upper movable die slowly opens and moves up under the action of the external driving structure, and in the process of opening and moving up of the upper movable die, the plurality of reset springs and the second reset springs in the compressed state can generate upward rebounding forces, so that the elastic forces generated by the compression of the springs can effectively reset and push the upper movable die, thereby assisting the elastic reset opening of the upper movable die, the elastic reset effect has the effect of assisting reset, improves the convenience of opening the mold, and the elastic reset can effectively avoid the problem of poor opening quality caused by hard separation of the mold, improves the product injection quality, has good practicability, and the overall structure is simple, the manufacturing and maintenance cost is low, and the utility model is suitable for popularization and use. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is an overall structure schematic view of the injection mold of the utility model embodiment.

[0015] Figure 2 It is a bottom view structure schematic view of the injection mold of the utility model embodiment.

[0016] Figure 3 It is an internal auxiliary reset structure schematic view of the lower fixed die of the utility model embodiment.

[0017] Figure 4 It is an A area enlarged structure schematic view of the utility model embodiment. Figure 3

[0018] In the drawing: 1, lower die seat; 2, lower fixed die; 3, positioning hole; 4, first reset spring; 5, reset rod; 6, square sliding groove; 7, second reset spring; 8, reset punch; 9, lower die cavity; 10, upper movable die; 11, positioning column; 12, square limiting groove; 13, upper die core. DETAILED DESCRIPTION ​

[0019] The technical solutions in the embodiments of the utility model will be apparently and completely described in connection with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the scope of protection of the utility model.

[0020] In the description of the utility model, it needs to be explained that the directions or position relations indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like are the directions or position relations shown based on the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0021] In the description of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "connection" and the like should be understood broadly, for example, "connection" can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through intermediate medium; can be the communication inside two elements. For the ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0022] Please refer to Figures 1-4 The utility model provides an embodiment: a kind of reset mechanism for injection mold, including lower die seat 1, lower die seat 1 upper surface is fixedly installed with lower fixed die 2, lower fixed die 2 outer surface four corners are all set with positioning hole 3, the inside bottom end of each positioning hole 3 is fixedly installed with first class reset spring 4, the top of first class reset spring 4 is fixedly installed with reset rod 5, reset rod 5 and positioning hole 3 slidingly connect, so when reset rod 5 suffers external pressure, reset rod 5 can be slid down in positioning hole 3 and compress first class reset spring;

[0023] Square chute 6 is set between two reset rods 5 of the same side and on lower fixed die 2, square chute 6 inner bottom wall four corners are all fixedly installed with second class reset spring 7, the top of four second class reset springs 7 is fixedly installed with reset convex die 8, reset convex die 8 and square chute 6 slidingly connect;

[0024] Similarly, when the reset punch 8 is subjected to external pressure, the reset punch 8 can slide downward in the square sliding groove 6, so that in the sliding process of the reset punch 8, the secondary reset spring 7 at the bottom end can be compressed, so that the secondary reset spring 7 is in a compressed state, and the compression condition of the spring is provided for subsequent elastic jacking reset;

[0025] The reset punch 8 adopts a four-corner supporting structure design, so that the stability of the jacking reset of the reset punch 8 can be effectively improved, the four-corner supporting stability is achieved, and the use effect is improved.

[0026] The upper die 10 is arranged above the lower die 2.

[0027] Further, the lower surface of the upper die 10 is fixedly provided with a positioning column 11 at four corners, the positioning column 11 and the positioning hole 3 are in a matched structure design, that is, the positioning column 11 can be inserted into the positioning hole 3, and the lower surface of the upper die 10 is provided with a square limiting groove 12 matched with the reset punch 8 at two sides.

[0028] The structure design can be used in combination with the four positioning holes 3 and the positioning column 11, so that the displacement positioning and guiding of the upper die 10 can be achieved, the displacement guiding effect is good, the position deviation during clamping is avoided, and the product quality is improved.

[0029] In the embodiment, in order to guarantee normal use of the injection mold, the lower die 2 is provided with a lower die cavity 9 at a central position of an upper surface, and the lower surface of the upper die 10 is fixedly provided with an upper die core 13 matched with the lower die cavity 9 at a central position.

[0030] Therefore, when the lower die cavity 9 and the upper die core 13 are clamped, the clamping injection molding process of the product can be completed.

[0031] Working principle: when the lower die 2 is fixedly installed on the external structure, and the upper die 10 is installed on the clamping driving structure for downward pressing;

[0032] When the upper die 10 is driven by the external structure to press downward, the positioning column 11 can be inserted into the positioning hole 3, so that the four positioning holes 3 and the positioning column 11 can be used in combination, the displacement positioning and guiding of the upper die 10 can be achieved, the displacement guiding effect is good, the position deviation during clamping is avoided, and the product quality is improved.

[0033] In the process of pressing the die by the lower die 10, the positioning columns 11 at four corners of the lower die 10 will compress the primary return springs 5 at the bottom end through the return rods 5, and the lower die 10 will also compress the secondary return springs 7 through the return punch 8, so that the primary return springs 5 and the secondary return springs 7 can play a good elastic protection effect in the process of pressing the die by the lower die 10, and have a good elastic buffering protection effect, that is, the rigid collision contact can be effectively avoided when the upper die 10 and the lower die 2 are combined, the movable die or the fixed die is prevented from being damaged in the die combining process, the service life of the die is prolonged, the stability is high, the maintenance and use cost of the die is reduced, and the product quality is ensured.

[0034] After the injection molding die is opened, the upper die 10 slowly opens and moves up under the action of the external driving structure, and in the process of opening and moving up of the upper die 10, the return spring 4 and the secondary return spring 7 in the compressed state can generate upward rebounding force, so that the elastic force generated by the spring compression can effectively elastically reset and push the upper die 10, thereby assisting the upper die 10 to elastically reset and open the die, the elastic resetting and pushing effect has the effect of assisting the resetting, improves the convenience of opening the die, and the elastic resetting and pushing can effectively avoid the problem of poor opening quality caused by hard separation of the die, improves the product injection quality, has good practicability, the overall structure is simple, the manufacturing and maintenance cost is low, and the utility model is suitable for popularization and use.

[0035] It is obvious for those skilled in the art that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the utility model is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any reference signs in the claims should not be regarded as limiting the claims.

Claims

1. A reset mechanism for an injection mold, comprising a lower mold base (1), characterized in that, A lower fixed mold (2) is fixedly installed on the upper surface of the lower mold base (1). Positioning holes (3) are provided at the four corners of the outer surface of the lower fixed mold (2). A first-level reset spring (4) is fixedly installed at the bottom of the interior of each positioning hole (3). A reset rod (5) is fixedly installed at the top of the first-level reset spring (4). The reset rod (5) is slidably connected to the positioning hole (3). A square groove (6) is provided between the two reset rods (5) on the same side and on the lower fixed mold (2). A second-level reset spring (7) is fixedly installed at the four corners of the bottom wall of the square groove (6). A reset punch (8) is fixedly installed between the tops of the four second-level reset springs (7). The reset punch (8) is slidably connected to the square groove (6). An upper moving mold (10) is provided above the lower fixed mold (2).

2. The reset mechanism for an injection mold according to claim 1, characterized in that: Positioning posts (11) are fixedly installed at the four corners of the lower surface of the upper moving mold (10), and the positioning posts (11) and the positioning holes (3) are designed to be compatible.

3. A reset mechanism for an injection mold according to claim 1, characterized in that: The lower surface of the upper moving mold (10) is provided with square limiting grooves (12) that are adapted to the reset punch (8).

4. A reset mechanism for an injection mold according to claim 1, characterized in that: The lower mold cavity (9) is provided at the center of the upper surface of the lower mold (2).

5. A reset mechanism for an injection mold according to claim 1, characterized in that: The upper moving mold (10) has an upper mold core (13) that is adapted to the lower mold cavity (9) fixedly installed at the center of its lower surface.

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