CN219133110U - Injection mold and injection product - Google Patents

Abstract

The utility model provides an injection mold and an injection product, comprising: a first mold having injection molded bumps; the second mould is provided with an injection molding cavity matched with the injection molding lug, and the injection molding lug and the injection molding cavity form an injection molding cavity when being matched; the first die is provided with a positioning bulge which protrudes out of the outer wall surface of the injection molding lug; when the injection molding lug is matched with the injection molding cavity, a preset gap is reserved between the positioning lug and the cavity wall of the injection molding cavity. By the technical scheme provided by the utility model, the technical problem that an injection mold in the prior art is easy to drag an injection product when injecting a part with a through hole can be solved.

Description

Injection mold and injection product

Technical Field

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

Background

At present, the shell structure in the prior art can be subjected to injection molding by adopting an injection mold, molten plastic materials are poured into a mold cavity, and after cooling and solidification, an injection molding finished product is formed. For a shell structure with a through hole, the injection mold comprises a first mold and a second mold, and a corresponding protruding structure is generally arranged at a position of the injection mold corresponding to the through hole, so that the first mold and the second mold are directly abutted through the protruding structure in the injection molding process, and thus a through hole-shaped structure is formed conveniently, and the through hole is generally positioned at the side part of an injection molding product.

However, by adopting the manufacturing mode, the convex structure is easy to rub with the cavity wall of the die to cause abrasion during demolding, so that the abrasion at the cavity can cause dragging damage to the injection molding product, and the appearance of the injection molding product is provided with flaws.

Disclosure of Invention

The utility model mainly aims to provide an injection mold and an injection product, which are used for solving the technical problem that the injection mold in the prior art is easy to drag the injection product when injecting a part with a through hole.

In order to achieve the above object, the present utility model provides an injection mold comprising:

a first mold having injection molded bumps;

the second mould is provided with an injection molding cavity matched with the injection molding lug, and the injection molding lug and the injection molding cavity form an injection molding cavity when being matched;

the first die is provided with a positioning bulge which protrudes out of the outer wall surface of the injection molding lug; when the injection molding lug is matched with the injection molding cavity, a preset gap is reserved between the positioning lug and the cavity wall of the injection molding cavity.

Further, a preset gap between the positioning protrusion and the cavity wall of the injection molding cavity is d;

wherein d is more than or equal to 0.1mm and less than or equal to 0.3mm.

Further, one end of the positioning bulge far away from the injection molding lug is provided with a positioning flange, the positioning flange is arranged at the edge of the positioning bulge, and the positioning flange protrudes out of the positioning bulge.

Further, one end of the positioning protrusion, which is far away from the injection molding protruding block, is provided with a groove, and the positioning flange is arranged around the groove.

Further, one end of the positioning bulge far away from the injection molding lug is provided with a groove, the groove is provided with an arc bottom surface, and the groove depth at the edge of the groove is smaller than the groove depth at the middle part of the groove.

Further, along the extending direction from one end of the positioning protrusion close to the injection molding protruding block to one end of the positioning protrusion far away from the injection molding protruding block, the positioning section of the positioning protrusion is gradually reduced.

Further, the positioning bulge is in a cylindrical structure or a conical structure; and/or the number of the groups of groups,

the positioning bulge is arranged at the side part of the injection molding lug.

Further, the first mold includes:

the main body part comprises a base and a first lug which are connected with each other, the first lug protrudes from the base, and a first inserting hole is formed in the main body part;

the inserting piece comprises an inserting portion and a second protruding block which are connected with each other, the inserting portion is inserted in the first inserting hole, the second protruding block is matched with the first protruding block to form an injection molding protruding block, and the positioning protruding block is arranged on the second protruding block.

Further, the second bump is provided with an arc-shaped matching side surface, the positioning protrusion is arranged on the arc-shaped matching side surface, and the positioning protrusion protrudes out of the arc-shaped matching side surface.

According to another aspect of the present utility model, there is provided an injection molding product, employing the injection mold provided above, the injection molding product including a body portion and a portion to be removed, which are connected to each other, the portion to be removed being formed between a positioning protrusion of the injection mold and a cavity wall of an injection cavity of the injection mold.

By applying the technical scheme of the utility model, the preset gap is reserved between the positioning bulge and the cavity wall of the injection molding cavity, so that the positioning bulge is prevented from being in direct contact with the second mold, burrs are prevented from being generated on the inner wall of the injection molding cavity, and the dragging damage of the burrs to the injection molding product in the process of taking out the injection molding product is further prevented. Therefore, the technical scheme provided by the utility model can solve the technical problem that the injection mold in the prior art is easy to drag the injection product when the part with the through hole is injection molded.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

fig. 1 shows a schematic view of a structure of an injection mold according to an embodiment of the present utility model when injection molding is performed;

fig. 2 is a schematic view showing a structure of an injection mold in an open state after injection molding according to an embodiment of the present utility model;

fig. 3 shows an enlarged schematic view of a partial structure of an injection mold a provided according to an embodiment of the present utility model;

fig. 4 shows an enlarged schematic view of a partial structure at B of an injection mold provided according to an embodiment of the present utility model;

fig. 5 is a schematic view showing a cross-sectional structure of an injection mold according to an embodiment of the present utility model when a positioning protrusion is provided with a positioning flange;

FIG. 6 is a schematic view of an injection mold according to an embodiment of the present utility model with positioning protrusions and positioning flanges and grooves;

fig. 7 shows an exploded view of the overall structure of an injection mold provided according to an embodiment of the present utility model.

Wherein the above figures include the following reference numerals:

10. a first mold; 11. injection molding the protruding block; 12. positioning the bulge; 121. positioning the flange; 122. a groove; 13. a main body portion; 131. a base; 132. a first bump; 133. a first insertion hole; 14. an insert; 141. an insertion portion; 142. a second bump;

20. a second mold; 21. an injection molding cavity;

30. and (5) injection molding of a product.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

Referring to fig. 1 to 7, in an embodiment of the present utility model, there is provided an injection mold including: a first mold 10 and a second mold 20. The first mould 10 has an injection moulding cam 11 and the second mould 20 has an injection moulding cavity 21 adapted to the injection moulding cam 11, the injection moulding cam 11 forming an injection moulding cavity when mated with the injection moulding cavity 21. Wherein, the first mould 10 is provided with a positioning bulge 12, and the positioning bulge 12 protrudes out of the outer wall surface of the injection molding lug 11; when the injection molding protrusion 11 is engaged with the injection molding cavity 21, a predetermined gap is provided between the positioning protrusion 12 and the cavity wall of the injection molding cavity 21.

With such arrangement, the positioning protrusion 12 is arranged on the first mold 10, and a preset gap is formed between the positioning protrusion 12 and the cavity wall of the injection molding cavity 21, so that the positioning protrusion 12 is not contacted with the cavity wall of the injection molding cavity 21 in the injection molding process of the injection molding product 30, and the cavity wall of the injection molding cavity 21 is not scratched, thereby avoiding the occurrence of the situation that burrs generated on the inner wall of the injection molding cavity 21 drag the injection molding product 30. Therefore, the injection mold provided by the embodiment can solve the technical problem that the injection mold in the prior art is easy to drag the injection product 30 when injecting the part with the through hole.

Specifically, the through hole of the injection molding product is mainly arranged at the side part, and the through hole is of a side hole structure. The injection molded product may be a thin-walled shell structure with side holes, and the wall thickness of the thin-walled shell structure may be less than or equal to 2mm. The injection molded product may be provided with a plurality of through hole structures.

Specifically, the body portion of the injection molded product 30 in this embodiment is a thin shell structure of equal wall thickness, d1, and d is smaller than d1 at the positioning boss 12. This allows the molded product 30 to be formed as a portion to be removed where it corresponds to the positioning boss 12. When the injection molding product 30 is taken out, since the wall thickness of the portion to be removed is smaller than d1, a stress concentration phenomenon occurs at the portion, resulting in a smaller structural strength at the portion, and the portion to be removed can be removed from the injection molding product 30 more easily, thereby forming a through hole structure at the portion.

Specifically, the through hole may be formed by breaking a portion where the wall thickness of the portion to be removed is smaller than d1.

In the present embodiment, the predetermined gap between the positioning boss 12 and the cavity wall of the injection molding cavity 21 is d. Wherein d is more than or equal to 0.1mm and less than or equal to 0.3mm. The arrangement can form a certain safety clearance value, thereby avoiding the positioning bulge 12 from being in direct contact with the cavity wall of the injection molding cavity 21, and avoiding the positioning bulge 12 from scratching the cavity wall of the injection molding cavity 21 so as to ensure the clean appearance surface of the injection molding product 30.

The preset gap between the positioning protrusion 12 and the cavity wall of the injection molding cavity 21 corresponds to the wall thickness of the portion to be removed.

Specifically, one end of the positioning boss 12 away from the injection molding boss 11 may be provided with a positioning flange 121, the positioning flange 121 being provided at an edge of the positioning boss 12, the positioning flange 121 being provided protruding from the positioning boss 12. This arrangement allows the injection molded product 30 to be thinner in thickness corresponding to the location flange 121 and more easily broken to form the through hole.

Specifically, the end of the positioning boss 12 remote from the injection molding boss 11 may also be provided with a groove 122, and the positioning flange 121 is provided around the groove 122. Such an arrangement may allow for a lower structural strength of the portion of the injection product 30 to be removed, and more convenient removal, by the engagement of the recess 122 with the locating flange 121. Specifically, the positioning flange 121 may be adapted to the shape of the preformed through hole, so that the wall thickness at the positioning flange 121 is thinner, so that a preset fracture is formed at a position corresponding to the positioning flange 121, so that the through hole structure is smoothly formed after the portion to be removed is removed.

Specifically, the groove 122 provided at the end of the positioning boss 12 remote from the injection molding boss 11 has an arc-shaped bottom surface, and the groove depth at the edge of the groove 122 is smaller than the groove depth at the middle of the groove 122. By adopting the structure, the thickness of the portion to be dismantled corresponding to the edge of the groove 122 can be conveniently and effectively ensured to be smaller than that of the portion to be dismantled corresponding to the middle of the groove 122, so that the peripheral edge of the portion to be dismantled is more conveniently and smoothly separated from the injection molding product 30.

In the present embodiment, the positioning cross section of the positioning boss 12 gradually decreases along the extending direction from the end of the positioning boss 12 near the injection molding boss 11 to the end of the positioning boss 12 far from the injection molding boss 11. Such an arrangement facilitates separation of the injection molded product 30 from the first mold 10 after injection molding is completed, while avoiding damage to the injection molded product 30 during removal.

In particular, the positioning projections 12 may have a cylindrical or tapered configuration, which facilitates the formation of corresponding circular or tapered through-holes in the injection molded product 30, and which also facilitates the separation of the injection molded product 30 from the first mold 10 after the injection molding is completed.

In the present embodiment, the positioning protrusions 12 are disposed at the side portions of the injection molding protrusions 11 to form through holes at corresponding positions of the side edges of the injection molding product 30, so as to meet the requirement for providing side through holes on the injection molding product 30.

In the present embodiment, the first mold 10 includes a main body portion 13 and an insert 14. The main body 13 includes a base 131 and a first bump 132 connected to each other, the first bump 132 protrudes from the base 131, and a first insertion hole 133 is formed in the main body 13. The insert 14 includes an insert portion 141 and a second bump 142 that are connected to each other, the insert portion 141 is inserted into the first insert hole 133, the second bump 142 and the first bump 132 cooperate to form the injection molding bump 11, and the positioning bump 12 is disposed on the second bump 142. With such a configuration, each part can be separated in sequence after injection molding of the injection molding product 30 is completed, and the production efficiency can be improved. Specifically, the first mold 10 in this embodiment is a movable mold, the insert 14 is an inclined top, and the second mold 20 is a fixed mold.

Specifically, the second bump 142 has an arc-shaped mating side, the positioning protrusion 12 is disposed on the arc-shaped mating side, the positioning protrusion 12 protrudes from the arc-shaped mating side, and such a configuration can enable the injection molding product 30 to form an arc-shaped structure, and also facilitates the provision of a through hole structure at the side portion, thereby meeting the use requirements of the injection molding product 30 and improving the aesthetic property.

An injection molding product according to a second embodiment of the present utility model is an injection molding mold according to the first embodiment, wherein the injection molding product 30 includes a body portion and a portion to be removed, which are connected to each other, and the portion to be removed is formed between the positioning protrusion 12 of the injection molding mold and a cavity wall of the injection molding cavity 21 of the injection molding mold. Specifically, after the injection molding product 30 is taken out, the portion to be removed is removed, so that a body portion with a through hole is formed, and the body portion with the through hole is the injection molding finished product to be obtained.

From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects: because the preset gap is arranged between the positioning bulge 12 and the cavity wall of the injection molding cavity 21, the direct contact between the positioning bulge 12 and the second mold 20 is avoided, and burrs are avoided from being generated in the cavity wall of the injection molding cavity 21, so that the technical problem that the injection molding mold in the prior art is easy to drag the injection molding product 30 when the part with the side hole is injected can be solved.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present application, it should be understood that, where azimuth terms such as "front, rear, upper, lower, left, right", "transverse, vertical, horizontal", and "top, bottom", etc., indicate azimuth or positional relationships generally based on those shown in the drawings, only for convenience of description and simplification of the description, these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present application; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are merely for convenience of distinguishing the corresponding components, and unless otherwise stated, the terms have no special meaning, and thus should not be construed as limiting the scope of the present application.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. An injection mold, comprising:

-a first mould (10), the first mould (10) having injection-moulded bumps (11);

the second mould (20) is provided with an injection molding cavity (21) matched with the injection molding lug (11), and the injection molding lug (11) and the injection molding cavity (21) form an injection molding cavity when being matched;

wherein, a positioning bulge (12) is arranged on the first mould (10), and the positioning bulge (12) is protruded out of the outer wall surface of the injection molding lug (11); when the injection molding lug (11) is matched with the injection molding cavity (21), a preset gap is reserved between the positioning protrusion (12) and the cavity wall of the injection molding cavity (21).

2. Injection mold according to claim 1, characterized in that the predetermined gap between the positioning projection (12) and the cavity wall of the injection mold cavity (21) is d;

wherein d is more than or equal to 0.1mm and less than or equal to 0.3mm.

3. Injection mold according to claim 1, characterized in that the end of the positioning projection (12) remote from the injection projection (11) is provided with a positioning flange (121), the positioning flange (121) being provided at the edge of the positioning projection (12), the positioning flange (121) protruding from the positioning projection (12).

4. An injection mould according to claim 3, characterized in that the end of the positioning projection (12) remote from the injection projection (11) is provided with a recess (122), the positioning flange (121) being arranged around the recess (122).

5. Injection mold according to claim 1, characterized in that the end of the positioning projection (12) remote from the injection projection (11) is provided with a groove (122), the groove (122) having an arc-shaped bottom surface, the groove depth at the edge of the groove (122) being smaller than the groove depth at the middle of the groove (122).

6. Injection mold according to claim 1, characterized in that the positioning cross section of the positioning protrusion (12) is gradually reduced along the extension direction from the end of the positioning protrusion (12) close to the injection protrusion (11) to the end of the positioning protrusion (12) remote from the injection protrusion (11).

7. The injection mold of claim 1, wherein the mold comprises a plurality of mold cavities,

the positioning bulge (12) is of a cylindrical structure or a conical structure; and/or the number of the groups of groups,

the positioning protrusions (12) are arranged on the side parts of the injection molding protruding blocks (11).

8. Injection mold according to claim 1, characterized in that the first mold (10) comprises:

a main body part (13), wherein the main body part (13) comprises a base (131) and a first lug (132) which are connected with each other, the first lug (132) is arranged protruding from the base (131), and a first inserting hole (133) is formed in the main body part (13);

insert (14), insert (14) include interconnect insert portion (141) and second lug (142), insert portion (141) insert and establish in first inserting hole (133), second lug (142) with first lug (132) cooperation forms injection molding lug (11), location protruding (12) set up on second lug (142).

9. The injection mold of claim 8, wherein the second projection (142) has an arcuate mating side, the positioning projection (12) being disposed on the arcuate mating side, the positioning projection (12) protruding from the arcuate mating side.

10. Injection product, characterized in that an injection mould according to any one of claims 1 to 9 is used, which comprises a body part and a part to be removed, which are connected to each other, which part to be removed is formed between a positioning projection (12) of the injection mould and a cavity wall of an injection cavity (21) of the injection mould.

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