CN219095790U - Mould and injection molding machine - Google Patents

Abstract

The utility model relates to a mold and an injection molding machine, which are used for injection molding of products with annular helical teeth, and comprise a fixed mold assembly and a movable mold assembly which can be close to or far from the fixed mold assembly, wherein a cavity for molding the products can be formed between the fixed mold assembly and the movable mold assembly; the movable die assembly comprises a movable die main body, a movable die insert, a driving piece and a sliding block die; the movable die insert comprises a helical tooth die part for forming annular helical teeth of the die cavity, the movable die insert is rotationally connected with the movable die main body by taking the axis direction of the movable die insert as the center, and the driving part is arranged on the movable die main body and is used for driving one of the movable die insert and a product to move in a direction away from the other along the axis direction of the movable die insert; the end face of one side of the sliding block mold is used for forming the characteristic of the inner wall of the cavity, and the sliding block mold is connected with the movable mold main body in a sliding manner along the direction perpendicular to the end face; the sliding block mold is separated from the product features preferentially, so that the interference of the separation between the follow-up movable mold insert and the product is avoided.

Description

Mould and injection molding machine

Technical Field

The utility model relates to the technical field of injection molds, in particular to a mold and an injection molding machine.

Background

Plastic injection molds are tools for producing plastic products and are very widely used. In injection molding of plastic products, if the molded product has helical teeth, the product and the mold are difficult to be pulled out, and the demolding is difficult.

At present, a movable die insert rotatably connected with a die main body is designed, the movable die insert is used for forming inclined teeth of a product, and when the product is ejected out for demolding, the movable die insert can be driven by the inclined teeth of the product to rotate relative to the die main body, so that the product can be ejected smoothly.

However, if other raised or recessed features (such as holes, grooves, BOSS posts, ribs, etc.) are present on the surface of the product, the mold is engaged with the features to block the rotation of the movable mold insert or to limit the relative movement between the movable mold insert and the product, thereby interfering with the ejection of the mold.

Disclosure of Invention

Based on the above, it is necessary to provide a mold and an injection molding machine suitable for demolding products with features other than helical teeth on the surface, aiming at the problem that the conventional helical tooth demolding structure is disturbed when other features exist on the surface of the product.

The application firstly provides a die for injection molding a product with annular helical teeth, which comprises a fixed die assembly and a movable die assembly which can be close to or far from the fixed die assembly, wherein a cavity for molding the product can be formed between the fixed die assembly and the movable die assembly; the movable die assembly comprises a movable die main body, a movable die insert, a driving piece and a sliding block die; the movable die insert comprises a helical tooth die part for forming annular helical teeth of the die cavity, the movable die insert is rotationally connected with the movable die main body by taking the axis direction of the movable die insert as a center, the driving piece is arranged on the movable die main body and is used for driving one of the movable die insert and the product to move away from the other along the axis direction of the movable die insert so as to enable the product to rotationally deviate from the movable die insert; the end face of one side of the sliding block mold is provided with a characteristic part for forming the inner wall structure of the cavity, and the sliding block mold is in sliding connection with the movable mold main body along the direction perpendicular to the end face.

In one embodiment, the mold further comprises a linkage part connected with the fixed mold assembly and the sliding block mold respectively, wherein the linkage part is used for driving the sliding block mold to slide in a direction away from the cavity when the movable mold assembly and the fixed mold assembly are away from each other and driving the sliding block mold to slide in a direction close to the cavity when the movable mold assembly and the fixed mold assembly are close to each other.

In one embodiment, the axis direction of the movable mold insert is perpendicular to the moving direction of the movable mold assembly, and the sliding block mold is slidingly connected with the movable mold main body along the direction parallel to the first plane; the linkage piece is fixed in the oblique guide pillar of cover half subassembly, the slider mould is close to the guiding hole has been seted up to one side of cover half subassembly, oblique guide pillar with guiding hole sliding connection, just the oblique guide pillar is close to the one end of movable mould subassembly is to keeping away from one side slope setting of die cavity.

In one embodiment, the angle between the oblique guide post and the first plane ranges from 70 degrees to 80 degrees.

In one embodiment, the slide mold is disposed concentrically within the movable mold insert.

In one embodiment, the movable mold assembly further comprises an insert base slidably connected with the movable mold main body, the movable mold insert is rotatably connected to one end of the insert base, which is close to the cavity, the insert base is internally provided with a slide block cavity which is opened to the cavity side along the axial direction of the movable mold insert, and the slide block mold is slidably connected with the inner wall of the slide block cavity.

In one embodiment, a first guiding part is fixedly arranged at one end of the sliding block mold, which is close to the cavity, and a second guiding part is fixedly arranged on the inner wall of the movable mold insert, and the first guiding part can extrude the second guiding part so as to drive the movable mold insert to rotate by taking the axis of the movable mold insert as the center.

In one embodiment, the driving member is an oil cylinder, and a telescopic end of the oil cylinder is fixedly connected with the insert base.

In one embodiment, the slide block mold is provided with a discharge hole in a penetrating manner along the axis direction of the slide block mold, and a core pulling insert is fixedly connected in the discharge hole through a bolt.

A second aspect of the present application provides an injection molding machine comprising the mold described above.

The mold is in sliding connection with the movable mold main body through the sliding block mold, so that after the mold is opened, the sliding block mold can be separated from the product characteristics by sliding to the side far away from the cavity, and the subsequent separation between the movable mold insert and the product is avoided; in addition, the sliding direction of the sliding block mold is vertical to the end face of one side of the inner wall of the cavity formed by the sliding block mold, so that interference between the sliding block mold and a formed product is reduced, and the sliding block mold can be smoothly separated from the product.

Drawings

FIG. 1 is a schematic top view of a mold of the present application;

FIG. 2 is a schematic cross-sectional view of the structure of FIG. 1 in the direction A-A;

FIG. 3 is an enlarged schematic view of the diagonal member, a portion of the movable mold assembly and the product of FIG. 2;

FIG. 4 is a schematic perspective view of the diagonal guide post, movable mold insert and slide mold of FIG. 3;

fig. 5 is a schematic perspective view of the oblique guide post and a part of the movable mold assembly in fig. 3.

Reference numerals: 10. a stationary mold assembly; 13. oblique guide posts; 20. a movable mold assembly; 21. a movable mold main body; 22. a movable mold insert; 221. a helical tooth mold portion; 225. a second guide part; 23. an insert base; 24. a slider mold; 25. an oil cylinder; 241. a guide hole; 242. a first guide part; 243. a discharge hole; 244. core pulling insert; 100. a cavity; 200. a product; 1. a first plane.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

In the description of the present utility model, it should 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", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Referring to fig. 1-3, the present application first provides a mold for injection molding a product 200 with annular helical teeth, comprising a fixed mold assembly 10 and a movable mold assembly 20 capable of being close to or far from the fixed mold assembly 10, wherein a cavity 100 for molding the product 200 can be formed between the fixed mold assembly 10 and the movable mold assembly 20; the movable die assembly 20 includes a movable die main body 21, a movable die insert 22, a driving member, and a slider die 24; the movable mold insert 22 includes a bevel-tooth mold portion 221 for forming an annular bevel tooth of the cavity 100, the movable mold insert 22 is rotatably connected with respect to the movable mold body 21 about its own axis direction, a driving member is provided to the movable mold body 21, and is configured to drive one of the movable mold insert 22 and the product 200 in a direction away from the other in the axis direction of the movable mold insert 22 so that the product 200 can be rotationally removed with respect to the movable mold insert 22; the one side end surface of the slide mold 24 is provided with a feature portion for constituting the inner wall structure of the cavity 100, and the slide mold 24 is slidably connected with respect to the movable mold body 21 in a direction perpendicular to the end surface.

The inner wall structure of the cavity 100 herein refers to a feature protruding or recessed from the inner wall of the cavity 100, and is used to shape a corresponding feature on the surface of the product 200, such as a hole, a groove, a BOSS column, or a stiffener.

It will be appreciated that if features other than helical teeth are present on the surface of the product 200, after the formation is completed, the features will be engaged with corresponding features on the inner wall of the cavity 100, thereby blocking rotation of the movable mold insert 22 or limiting relative movement between the movable mold insert 22 and the product 200, thereby interfering with mold release.

In the present application, the slide mold 24 is slidably connected to the movable mold body 21, so that after the mold is opened, the slide mold 24 can be separated from the product 200 by sliding to the side far away from the cavity 100, so as to avoid interference between the subsequent movable mold insert 22 and the product 200; in addition, the sliding direction of the sliding block mold 24 is perpendicular to the end face of one side of the inner wall of the cavity 100, so as to reduce interference between the sliding block mold 24 and the molded product 200, and ensure that the sliding block mold 24 can be smoothly separated from the product 200.

In some embodiments, the mold further includes a linkage member connected to the fixed mold assembly 10 and the slide mold 24, respectively, the linkage member is configured to drive the slide mold 24 to slide away from the cavity 100 when the movable mold assembly 20 is away from the fixed mold assembly 10, and to drive the slide mold 24 to slide toward the cavity 100 when the movable mold assembly 20 is close to the fixed mold assembly 10.

In the process of moving the movable die assembly 20 to move away from the fixed die assembly 10 for die opening, the linkage piece drives the sliding block die 24 to be automatically separated from the product 200, so that interference can not occur when the following movable die insert 22 is separated from the skewed tooth part of the product 200; in addition, in the process of moving the movable mold assembly 20 to close to the fixed mold assembly 10, the linkage piece drives the slide block mold 24 to automatically reset, so that the next product 200 is formed.

Referring to fig. 2, 3 and 4, in some embodiments, the axial direction of the movable mold insert 22 is perpendicular to the moving direction of the movable mold assembly 20, and the slide mold 24 is slidably connected to the movable mold body 21 along a direction parallel to the first plane 1; the linkage piece is an inclined guide post 13 fixed on the fixed die assembly 10, a guide hole 241 is formed in one side, close to the fixed die assembly 10, of the slide block die 24, the inclined guide post 13 is in sliding connection with the guide hole 241, and one end, close to the movable die assembly 20, of the inclined guide post 13 is obliquely arranged to one side, far away from the cavity 100.

In the process of moving the movable die assembly 20 to open the die in a direction away from the fixed die assembly 10, the inner wall of the guide hole 241 has a pressing force on the inclined guide post 13 along the moving direction of the movable die assembly 20, so that the slide die 24 can receive a reaction force applied by the inclined guide post 13 in an opposite direction;

because the end of the inclined guide post 13 near the movable die assembly 20 is inclined towards the side far away from the die cavity 100, the reaction force applied by the inclined guide post 13 to the slide die 24 can be decomposed into a component force far away from the die cavity 100 along the sliding direction of the slide die 24 and a component force near the fixed die assembly 10 along the length direction of the inclined guide post 13, wherein the component force far away from the die cavity 100 along the sliding direction of the slide die 24 can drive the slide die 24 to move towards the direction far away from the die cavity 100, so that the slide die 24 is automatically separated from the corresponding product 200 characteristics while the movable die assembly 20 is opened, and the subsequent movable die insert 22 is separated from the skewed tooth part of the product 200.

In some embodiments, the angle between the oblique guide post 13 and the first plane 1 ranges from 70 degrees to 80 degrees.

If the included angle is greater than the range, the displacement of the slide mold 24 along the direction of the first plane 1 is smaller in the moving process of the inclined guide post 13, and the length of the inclined guide post 13 required for completely separating the slide mold 24 from the product 200 is longer, so that the mold volume is relatively larger; if the included angle is smaller than the range, it may be difficult for the oblique guide post 13 to drive the slide mold 24 to move, and even self-locking may occur between the oblique guide post 13 and the slide mold 24.

Referring to fig. 2, 3 and 5, in some embodiments, a slide mold 24 is concentrically disposed within the movable mold insert 22 to meet the demolding requirements of a product 200 having other features within the helical tooth feature.

Referring to fig. 2, 3 and 4, in some embodiments, the movable mold assembly 20 further includes an insert base 23 slidably connected to the movable mold main body 21, the movable mold insert 22 is rotatably connected to an end of the insert base 23 near the cavity 100, a slide cavity opening to the cavity 100 side along an axial direction of the movable mold insert 22 is provided in the insert base 23, and the slide mold 24 is slidably connected to an inner wall of the slide cavity; the slider mold 24 has a first guide portion 242 fixed at one end thereof adjacent to the cavity 100, and a second guide portion 225 fixed at an inner wall of the movable mold insert 22, wherein the first guide portion 242 can press the second guide portion 225 to drive the movable mold insert 22 to rotate about its own axis.

It can be appreciated that, in the process of closing the movable mold assembly 20 and the fixed mold assembly 10, the slide mold 24 automatically slides towards the direction approaching to the cavity 100 under the driving of the inclined guide post 13, and the first guide portion 242 and the second guide portion 225 are abutted against each other to drive the movable mold insert 22 to reversely reset, so that the shape of the cavity 100 is restored, and the subsequent forming work is facilitated.

Referring to fig. 2, in some embodiments, the driving member is an oil cylinder 25, and a telescopic end of the oil cylinder is fixedly connected with the insert base 23; compared with a cylinder, a motor or other common driving structures, the driving force of the oil cylinder is relatively large, and the requirement of driving the insert base 23 to move can be met.

Of course, the driving member may be a cylinder, a motor or other conventional driving structure as long as the driving force requirement is satisfied.

Referring to fig. 2, in some embodiments, a discharge hole 243 is formed through the slide mold 24 along the axis direction thereof, and a core pulling insert 244 is fixedly connected in the discharge hole 243 by a bolt; to facilitate replacement of the relatively fragile core insert 244.

A second aspect of the present application provides an injection molding machine comprising the mold described above.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. A mold for injection molding a product (200) with annular helical teeth, characterized by comprising a fixed mold assembly (10) and a movable mold assembly (20) capable of being moved closer to or farther from the fixed mold assembly (10), wherein a cavity (100) for molding the product (200) can be formed between the fixed mold assembly (10) and the movable mold assembly (20);

the movable die assembly (20) comprises a movable die main body (21), a movable die insert (22), a driving piece and a sliding block die (24);

the movable mold insert (22) comprises a helical tooth mold part (211) for forming an annular helical tooth of the cavity (100), the movable mold insert (22) is rotationally connected relative to the movable mold main body (21) by taking the self axis direction as the center, the driving piece is arranged on the movable mold main body (21) and is used for driving one of the movable mold insert (22) and the product (200) to move away from the other along the axis direction of the movable mold insert (22) so as to enable the product (200) to rotate and fall off relative to the movable mold insert (22);

one side end surface of the sliding block mold (24) is provided with a characteristic part for forming an inner wall structure of the cavity (100), and the sliding block mold (24) is in sliding connection relative to the movable mold main body (21) along a direction perpendicular to the end surface.

2. The mold according to claim 1, further comprising a linkage member connected to the stationary mold assembly (10) and the slide mold (24), respectively, the linkage member being configured to drive the slide mold (24) to slide away from the cavity (100) when the movable mold assembly (20) is away from the stationary mold assembly (10), and to drive the slide mold (24) to slide toward the cavity (100) when the movable mold assembly (20) is close to the stationary mold assembly (10).

3. The mold according to claim 2, wherein the axial direction of the movable mold insert (22) is perpendicular to the moving direction of the movable mold assembly (20), and the slide mold (24) is slidably connected to the movable mold body (21) in a direction parallel to the first plane (1);

the linkage piece is fixed in oblique guide pillar (13) of cover half subassembly (10), slider mould (24) are close to one side of cover half subassembly (10) has seted up guiding hole (241), oblique guide pillar (13) with guiding hole (241) sliding connection, just oblique guide pillar (13) are close to one end of movable mould subassembly (20) is to keeping away from one side slope setting of die cavity (100).

4. A mould according to claim 3, characterized in that the angle between the oblique guide post (13) and the first plane (1) ranges from 70 degrees to 80 degrees.

5. The mold according to claim 1, characterized in that the slide mold (24) is arranged concentrically within the movable mold insert (22).

6. The mold according to claim 5, wherein the movable mold assembly (20) further comprises an insert base (23) slidably connected to the movable mold main body (21), the movable mold insert (22) is rotatably connected to an end of the insert base (23) near the cavity (100), a slide cavity (251) opening toward the cavity (100) side along an axial direction of the movable mold insert (22) is provided in the insert base (23), and the slide mold (24) is slidably connected to an inner wall of the slide cavity (251).

7. The mold according to claim 6, wherein a first guiding portion (242) is fixedly arranged at one end of the slide mold (24) close to the cavity (100), a second guiding portion (225) is fixedly arranged at an inner wall of the movable mold insert (22), and the first guiding portion (242) can squeeze the second guiding portion (225) to drive the movable mold insert (22) to rotate around an axis thereof.

8. The die of claim 6, wherein the driving member is an oil cylinder (25), and a telescopic end of the oil cylinder (25) is fixedly connected with the insert base (23).

9. The mold according to claim 1, wherein the slide mold (24) is provided with a discharge hole (243) penetrating along the axis direction thereof, and a core pulling insert (244) is fixedly connected in the discharge hole (243) through a bolt.

10. An injection molding machine comprising a mold according to any one of claims 1 to 9.

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