CN113665068A

CN113665068A - Injection mold and fixing structure thereof

Info

Publication number: CN113665068A
Application number: CN202110957776.2A
Authority: CN
Inventors: 胡东波; 许明南; 梁春龙; 薛坤超
Original assignee: Jiangmen Rongsheng Industrial Co ltd
Current assignee: Jiangmen Rongsheng Industrial Co ltd
Priority date: 2021-08-19
Filing date: 2021-08-19
Publication date: 2021-11-19

Abstract

The invention relates to the technical field of injection molds, and discloses a fixed structure and an injection mold, wherein the fixed structure includes a fixed mold and a fixed template for being installed on an injection molding machine; the fixed mold has a gate, and the fixed mold has a gate. The template has positioning holes; at least one positioning groove is formed on the bottom side of the lower part of the fixed mold, and the two sides of the positioning groove along the thickness direction of the fixed mold are respectively penetrated on opposite sides of the fixed mold; the fixed template At least one positioning portion protruding outward is provided on the side opposite to the fixed mold; when the fixed mold is attached to the fixed platen, each of the positioning grooves is buckled on each of the positioning portions, so that the The gate and the positioning hole are aligned and communicated with each other. The invention utilizes the positioning groove of the fixed mold and the positioning part of the fixed template to be mutually buckled, so that the gate and the positioning hole are aligned and communicated with each other, which overcomes the problem of large errors in the alignment of the gate and the nozzle manually observed by the naked eye in the later stage. defect.

Description

Injection mold and fixing structure thereof

Technical Field

The invention relates to the technical field of injection molds, in particular to an injection mold and a fixing structure thereof.

Background

The injection mold comprises a fixed mold and a movable mold, the fixed mold is fixed on the injection molding machine and is stationary, and the movable mold transversely moves under the hydraulic drive of the injection molding machine to be matched with the fixed mold. Typically, the mold cavity is on a stationary mold, the core is on a movable mold, and the sprue is typically located at the bottom of the stationary mold and aligned with the nozzle of the injection molding machine so that the melt enters the mold cavity along the nozzle and sprue.

In the prior art, a fixed mold or a movable mold is fixed on an injection molding machine through a mold plate, wherein a positioning hole matched with an inlet gate is formed in the fixed mold plate connected with the fixed mold, and the inlet gate is communicated with the positioning hole of the fixed mold plate through a positioning sleeve. However, in the die adjusting process, as the movable die moves transversely through hydraulic pressure, friction is easy to occur between the positioning sleeve and the positioning hole of the fixed die plate, and the positioning hole deforms after long-time use, so that a gap exists between the positioning sleeve and the positioning hole, and the position between the sprue and the positioning hole deviates. The injection nozzle of the injection molding machine can be aligned with the sprue of the fixed die only by naked eyes at the later stage, so that large assembly errors exist, the melt flowing out of the injection nozzle cannot accurately and directly enter the cavity from the positioning hole, the glue leakage phenomenon occurs, and the product quality is influenced.

Disclosure of Invention

In order to solve the technical problem that a large assembly error exists between a sprue of a fixed die and an injection nozzle of an injection molding machine after a positioning hole of a fixed die plate is abraded, the invention provides a fixing structure which comprises the fixed die and the fixed die plate, wherein the fixed die plate is used for being installed on the injection molding machine; the fixed die is provided with a gate, and the fixed die plate is provided with a positioning hole;

at least one positioning groove is formed in the bottom side of the lower portion of the fixed die, and two sides of the positioning groove in the thickness direction of the fixed die respectively penetrate through two opposite sides of the fixed die;

the side surface of the fixed die plate, which is opposite to the fixed die, is provided with at least one positioning part protruding outwards;

when the fixed die is attached to the fixed die plate, the positioning grooves are buckled on the positioning parts, so that the inlet gates and the positioning holes are aligned and communicated with each other.

Furthermore, the number of the positioning grooves is two, and the two positioning grooves are arranged at intervals along the length direction of the bottom side of the lower part of the fixed die;

the number of the positioning parts is two, and the two positioning parts and the two positioning grooves are arranged in a one-to-one correspondence mode.

Further, the constant head tank include the arc bottom surface and two respectively the smooth connection in the connection face of arc bottom surface both sides, connect the face edge the arc bottom surface is past toward the slope setting gradually outward in the opening direction of constant head tank.

Furthermore, the positioning part is of a cylindrical structure, and one end of the positioning part, which is in a plane shape, is in threaded connection with the side surface of the fixed die plate;

when the positioning groove is buckled on the positioning part, the curved surface part of the positioning part is attached to the arc-shaped bottom surface.

Furthermore, a plurality of through holes for pins to pass through are formed in the fixed die, a plurality of pin holes are formed in the fixed die plate, and the through holes correspond to the pin holes in a one-to-one mode.

In addition, the invention also provides an injection mold which comprises a fixed mold and a movable mold, wherein the fixed mold is arranged on an injection molding machine by adopting the fixed structure.

Furthermore, a plurality of guide posts are arranged on one side, facing the fixed die, of the movable die, a plurality of guide sleeves are arranged on one side, facing the movable die, of the fixed die, and the guide posts are matched with the guide sleeves to slide respectively.

Further, one side of the movable mold, which faces the fixed mold, is provided with a plurality of return springs.

Compared with the prior art, the injection mold and the fixing structure thereof have the beneficial effects that:

the invention utilizes the mutual fastening of the positioning groove of the fixed die and the positioning part of the fixed die plate to ensure that the sprue and the positioning hole are aligned and communicated with each other, thereby avoiding the position deviation caused by the clearance between the positioning sleeve and the positioning hole of the fixed die plate in the prior art and overcoming the defect of large error caused by the later manual observation of the alignment of the sprue and the injection nozzle by naked eyes. In addition, the location portion on the fixed die plate plays a supporting role, prevents that insufficient pressure of the hydraulic die clamping device or magnetic attraction loss of the injection molding machine template from causing the risk that the die falls to damage the injection molding machine base, and is convenient for the assembly of other location structures on the fixed die and the fixed die plate.

The positioning part of the invention has small abrasion degree after long-time use, and the positioning part can be detachably connected with the fixed template, thereby being convenient for replacing the abraded positioning part and ensuring the assembly precision of the sprue and the injection nozzle of the injection molding machine.

Drawings

FIG. 1 is a schematic view of the attachment of the fixation structure of the present invention;

FIG. 2 is a schematic structural diagram of a stationary mold of the present invention;

FIG. 3 is a front view of FIG. 2;

FIG. 4 is a schematic structural view of a stationary platen according to the present invention;

FIG. 5 is a schematic structural view of the injection mold of the present invention;

in the figure, the position of the upper end of the main shaft,

1. fixing a mold; 11. a gate is arranged; 12. positioning a groove; 121. an arcuate bottom surface; 122. a connecting surface; 13. a through hole; 14. a guide sleeve;

2. fixing a template; 21. positioning holes; 22. a positioning part;

3. moving the mold; 31. a guide post;

4. a pin.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Referring to fig. 1-4, fig. 1 is a schematic connection diagram of a fixing structure according to the present invention; FIG. 2 is a schematic structural diagram of a stationary mold of the present invention; FIG. 3 is a front view of the stationary mold; FIG. 4 is a schematic structural diagram of a fixed die plate of the present invention. Specifically, the fixing structure comprises a fixed die 1 and a fixed die plate 2 which is used for being installed on an injection molding machine; the fixed die 1 is provided with an inlet gate 11, and the fixed die plate 2 is provided with a positioning hole 21; at least one positioning groove 12 is formed at the bottom side of the lower part of the fixed die 1, and two sides of the positioning groove 12 along the thickness direction of the fixed die 1 respectively penetrate through two opposite sides of the fixed die 1; the side surface of the fixed die plate 2 relative to the fixed die 1 is provided with at least one positioning part 22 protruding outwards; when the fixed mold 1 is attached to the fixed mold plate 2, the positioning grooves 12 are fastened to the positioning portions 22, so that the gate 11 and the positioning hole 21 are aligned with each other and communicate with each other.

The number of the positioning grooves 12 is not limited to a specific number, for example, the number of the positioning grooves 12 may be one, two, or three, and the number of the positioning portions 22 is the same as the number of the positioning grooves 12. Illustratively, the number of the positioning grooves 12 is two, and the two positioning grooves 12 are arranged at intervals along the length direction of the bottom side of the lower part of the fixed die 1; the number of the positioning portions 22 is two, and the two positioning portions 22 are arranged in one-to-one correspondence with the two positioning grooves 12.

Further, the present invention also does not limit the specific structure of the positioning groove 12 or the positioning portion 22, the positioning groove 12 may be a U-shaped groove, a V-shaped groove, a square groove, or the like, and the positioning portion 22 may be a cylinder, a cone, a square cylinder, or the like, and is adaptively designed according to the embodiment. The opening of the positioning groove 12 should have a transverse dimension larger than the transverse length dimension of the positioning portion 22, so that the positioning portion 22 can smoothly enter the positioning groove 12.

Referring to fig. 2-3, in the embodiment of the present invention, the positioning slot 12 includes an arc-shaped bottom surface 121 and two connecting surfaces 122 smoothly connected to two sides of the arc-shaped bottom surface 121, and the connecting surfaces 122 are gradually inclined outward along the arc-shaped bottom surface 121 toward the opening of the positioning slot 12, so that a figure-of-eight shape is formed between the two connecting surfaces 122, that is, the opening size of the positioning slot 12 is larger than the diameter size of the arc-shaped bottom surface 121, which is convenient for the positioning portion 22 to smoothly slide into the positioning slot 12 and make the surface of the positioning portion abut against the arc-shaped bottom surface 121, thereby ensuring the connection stability between the positioning portion 22 and the positioning slot 12.

Further, referring to fig. 4, the positioning portion 22 of the embodiment of the present invention is a cylindrical structure, and one end of the positioning portion 22, which is in a plane shape, is in threaded connection with the side surface of the fixed die plate 2; when the positioning groove 12 is fastened to the positioning portion 22, the curved surface portion of the positioning portion 22 is attached to the arc-shaped bottom surface 121. Specifically, threaded fasteners such as screws or bolts are used to penetrate through the positioning portions 22 and be connected to the side surfaces of the fixed die plate 2, so that the worn positioning portions 22 can be replaced conveniently. Referring to fig. 1, the curved surface portion of the positioning portion 22 and the arc-shaped bottom surface 121 of the positioning groove 12 are in contact with each other, so that the contact area is large and the stability of bearing load is high.

Further, referring to fig. 2-3, a plurality of through holes 13 are formed on the fixed mold 1, a plurality of pin holes are formed on the fixed mold plate 2, and the plurality of through holes 13 correspond to the plurality of pin holes one to one. In the assembling process of the fixed die 1 and the fixed die plate 2, the pins 4 penetrate through the through holes 13 to be connected in the pin holes, so that the fixed die 1 and the fixed die plate 2 are limited in all directions through the pins 4, and the fixed die 1 and the fixed die plate 2 are firmly connected.

The assembling process between the fixed mold 1 and the fixed mold plate 2 of the invention is as follows: firstly, the fixed die 1 is hoisted by a lifting appliance and moved above the fixed die plate 2, then the fixed die 1 vertically moves downwards relative to the fixed die plate 2, so that the positioning groove 12 is buckled on the positioning part 22, the positioning part 22 plays a supporting role on the fixed die 1, the injection gate 11 is aligned and communicated with the positioning hole 21, so that the injection nozzle of the injection molding machine is aligned and communicated with the injection gate 11 directly through the positioning hole 21, and finally, the pin 4 penetrates through the through hole 13 to be connected with the pin hole, so that the fixed die 1 and the fixed die plate 2 are fixed.

To sum up, the embodiment of the present invention provides a fixing structure, in which the positioning groove 12 of the fixed mold 1 is fastened to the positioning portion 22 of the fixed mold plate 2, so that the gate 11 is aligned and communicated with the positioning hole 21, thereby avoiding the position deviation between the positioning sleeve and the positioning hole 21 of the fixed mold plate 2 caused by the gap, and overcoming the defect of large error in later manual alignment between the gate 11 and the nozzle.

In addition, the fixing structure of the invention has the following advantages:

(1) the positioning part 22 on the fixed die plate 2 plays a supporting role, the risk that the die falls to break the injection molding machine base due to insufficient pressure of the hydraulic die clamping device or magnetic attraction loss of the injection molding machine die plate is prevented, and meanwhile, the fixed die 1 and the fixed die plate 2 are convenient to assemble other positioning structures.

(2) The abrasion degree of the positioning part 22 of the invention is small after long-time use, and the positioning part 22 can be detachably connected with the fixed die plate 2, so that the abraded positioning part 22 is convenient to replace, and the assembly precision of the sprue 11 and the injection nozzle of the injection molding machine is ensured.

(3) The inclination that the mould exists at the in-process of lifting by crane can be solved, make mould and injection molding machine be in mutual balance, can prevent to lead to injection molding machine ejector pin and mould thimble hole off normal jamming problem because the mould slope.

(4) The problem that the mold slightly sinks due to insufficient fastening force of the mold stacking cambered plate, and the problem that the sprue 11 and the injection nozzle of the injection molding machine are deviated is solved.

Referring to fig. 5, an embodiment of the present invention further provides an injection mold, including a fixed mold 1 and a movable mold 3, wherein the fixed mold 1 is mounted on an injection molding machine by using the above-mentioned fixing structure.

Further, one side of the fixed die 1 is provided with a plurality of guide posts 31, one side of the fixed die 1 facing the movable die 3 is provided with a plurality of guide sleeves 14, and the plurality of guide posts 31 are respectively matched with the plurality of guide sleeves 14 for sliding. The movable die 3 moves towards the fixed die 1 transversely under the hydraulic drive, and the sliding stability of the movable die 3 is improved through the guide columns 31 and the guide sleeve 14.

Further, the movable mold 3 is provided with a plurality of return springs on a side facing the fixed mold 1. When the movable die 3 is driven by hydraulic pressure to move towards the fixed die 1 transversely, the reset spring is pressed to deform so as to generate elastic potential energy, after the injection mold completes the injection molding process, the hydraulic pressure is cancelled, and the reset spring releases the elastic potential energy to drive the movable die 3 to reset, so that the movable die 3 and the fixed die 1 are separated from each other, and the labor is saved and the efficiency is high.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A fixed structure is characterized by comprising a fixed die and a fixed die plate which is used for being installed on an injection molding machine; the fixed die is provided with a gate, and the fixed die plate is provided with a positioning hole;

2. The fixed structure of claim 1, wherein the number of the positioning grooves is two, and the two positioning grooves are spaced apart along the length of the bottom side of the lower portion of the fixed mold;

3. The fixing structure according to claim 1, wherein the positioning groove includes an arc-shaped bottom surface, and two connecting surfaces which are smoothly connected to both sides of the arc-shaped bottom surface, respectively, and are inclined gradually outward along the arc-shaped bottom surface toward the opening of the positioning groove.

4. The fixing structure according to claim 3, wherein the positioning portion is a cylindrical structure, and one end of the positioning portion, which is planar, is in threaded connection with the side surface of the fixed die plate;

5. The fixing structure according to claim 1, wherein the fixed die is formed with a plurality of through holes for passing pins therethrough, and the fixed die plate is formed with a plurality of pin holes corresponding one-to-one to the plurality of pin holes.

6. An injection mold comprising a fixed mold and a movable mold, wherein the fixed mold is mounted on an injection molding machine using the fixing structure according to any one of claims 1 to 5.

7. An injection mold according to claim 6, wherein a side of the movable mold facing the fixed mold is provided with a plurality of guide posts, a side of the fixed mold facing the movable mold is provided with a plurality of guide sleeves, and the plurality of guide posts are respectively matched and slide with the plurality of guide sleeves.

8. An injection mold according to claim 6, wherein a side of the movable mold facing the fixed mold is provided with a plurality of return springs.