CN219095720U - Insert injection mold and plastic product - Google Patents

Abstract

The utility model discloses an insert injection mold and a plastic product, wherein the insert injection mold comprises a first mold component and a second mold component which are opposite to each other, an injection cavity is formed between the first mold component and the second mold component, a closed annular sealing convex ring and a closed annular fixing convex ring are arranged on opposite surfaces of the second mold component, the height of the sealing convex ring is higher than that of the fixing convex ring, and the sealing convex ring is pressed on a sound absorbing element at the inner side of the fixing convex ring so as to prevent sizing materials from flowing into the surface of the sound absorbing element at the inner side of the sealing convex ring; the fixing convex ring is used for pressing the edge of the sound-absorbing element into the sizing material; in the insert injection mold, the sealing convex ring can prevent the glue material from entering the sound-absorbing element, the fixing convex ring is pressed on the edge of the sound-absorbing element, so that the glue material can be fully wrapped, finally, the glue channeling phenomenon is not easy to occur on the surface of the sound-absorbing element, and the appearance defect that the corners of the sound-absorbing element protrude out of the surface of a plastic product is not easy to occur.

Description

Insert injection mold and plastic product

Technical Field

The utility model relates to an injection mold, in particular to an insert injection mold and a plastic product.

Background

In an automobile air filter system, the function of an air filtering air inlet pipeline comprises two parts, namely, inputting air in the atmosphere into an air filter for filtering, and arranging a silencing element on an air inlet pipe to reduce noise at an air inlet; at present, the comfort requirements of consumers on automobiles are higher and higher, so as to meet the higher NVH requirements, and meanwhile, the cost of parts is reduced, sound absorbing elements made of PET or other materials are arranged on an air inlet pipeline, and the noise of the whole frequency range is reduced by integrally injection molding on the pipeline.

In general, the sound-absorbing element is made of a softer material, and when the sound-absorbing element is placed in a mold for embedding, glue channeling of the sound-absorbing element (namely, glue flowing to the surface of the sound-absorbing element) is easy to occur, so that the sound-absorbing element is invalid; in addition, in the process of embedding in the sound-absorbing element mould, the corners of the sound-absorbing element are easier to protrude from the surface of the sizing material, so that protruding corners of the sound-absorbing element are formed on the surface of the final plastic product, and poor appearance of the product is caused.

Disclosure of Invention

The utility model aims to overcome the defects in the background technology and provides an insert injection mold and a plastic product.

The utility model adopts the following technical scheme to realize the aim:

in one aspect, the utility model discloses an insert injection mold for insert molding a sizing material and a flexible sound absorbing element into a plastic product, wherein the insert injection mold comprises a first mold component and a second mold component which are opposite to each other, and an injection cavity is formed between the first mold component and the second mold component;

the opposite surface of the second die assembly is provided with a closed-loop sealing convex ring and a closed-loop fixing convex ring, the height of the sealing convex ring is higher than that of the fixing convex ring, and the sealing convex ring is pressed on the sound-absorbing element at the inner side of the fixing convex ring so as to prevent sizing materials from flowing into the surface of the sound-absorbing element at the inner side of the sealing convex ring; the fixing convex ring is used for pressing the edge of the sound absorbing element into the sizing material.

Further, the opposite surface of the second die assembly is a core surface, and the opposite surface of the first die assembly is a cavity surface.

Further, the outline of the sealing convex ring is triangle, quadrangle, pentagon, circle, semicircle or ellipse.

Further, the cavity surface is provided with a plurality of pins for penetrating the sound absorbing element, and the upper ends of the pins are in a shuttle-shaped structure with two thin ends and a thick middle part in the axial direction of the pins.

In another aspect, the present utility model provides a plastic article injection molded using the insert injection mold as described above, wherein at least one side surface of the plastic article is embedded with a sound absorbing element.

Further, the sound absorbing element is a sound absorbing sponge.

Further, the surface of the sound absorbing element is provided with a plurality of reinforcing ribs.

Compared with the prior art, the utility model has the following beneficial effects:

according to the insert injection mold disclosed by the utility model, the opposite surface of the second mold component is provided with the sealing convex ring and the fixing convex ring, the sealing convex ring can prevent rubber materials from entering the sound-absorbing element, and the fixing convex ring is pressed at the edge of the sound-absorbing element, so that the rubber materials can be fully wrapped; finally, the surface of the sound-absorbing element on the surface of the plastic product is not easy to generate a glue channeling phenomenon, and the appearance defect that the corners of the sound-absorbing element protrude out of the surface of the plastic product is not easy to generate.

Drawings

FIG. 1 is a schematic diagram of an insert injection mold according to the present utility model;

FIG. 2 is a schematic view of the pin and sound absorbing element assembly principle of the present utility model;

FIG. 3 is a schematic diagram of the function of the sealing collar and the fixing collar of the present utility model;

fig. 4 is a schematic structural diagram of an insert injection mold according to the present utility model:

icon: 1-a first die assembly, 2-pins, 3-sound absorbing elements, 4-point gates, 5-ejector pins, 6-a second die assembly, 60-sealing convex rings, 61-fixing convex rings and 7-nozzle needles.

Detailed Description

The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:

referring to fig. 1 to 4, the present utility model discloses an insert injection mold for insert molding a rubber material and a flexible sound absorbing member 3 into a plastic product so that the plastic product has the functions of absorbing sound and reducing noise.

Embodiment one:

the insert injection mold comprises a first mold component 1 and a second mold component 6 which are opposite to each other, and an injection cavity is formed between the first mold component 1 and the second mold component 6.

It should be noted that: the first mold assembly 1 and the second mold assembly 567 may correspond to an upper mold and a lower mold, a front mold and a rear mold, a male mold and a female mold, a movable mold and a fixed mold, a female mold and a male mold, and the like, according to trade custom names.

In this embodiment, the first mold assembly 1 is a rear mold, the second mold assembly 6 is a front mold opposite to the rear mold, wherein the opposite surface of the second mold assembly 6 is a core surface, and the opposite surface of the first mold assembly 1 is a cavity surface.

Referring to fig. 1 and 4, the second die assembly 6 is provided with a closed annular sealing collar 60 and a closed annular fixing collar 61 on opposite sides thereof.

Referring to fig. 3, the sealing convex ring 60 and the fixing convex ring 61 are both formed on a convex rib on the core surface, and the height of the sealing convex ring 60 is higher than that of the fixing convex ring 61, so that the cross-sectional shapes of the sealing convex ring 60 and the fixing convex ring 61 are in a step shape as shown in fig. 3.

In the insert molding process, the sealing convex ring 60 is pressed on the sound absorbing element 3 inside the fixing convex ring 61, the sound absorbing element 3 is pressed and compressed and deformed, the fixing convex ring 61 is pressed on the surface of the edge side of the sound absorbing element 3, and the compression degree of the sound absorbing element 3 under the sealing convex ring 60 is greater than the compression degree under the fixing convex ring 61 due to the protruding height of the sealing convex ring 60 and the height of the fixing convex ring 61.

Therefore, due to the pressing action of the sealing convex ring 60, the glue can be prevented from flowing into the surface of the sound absorbing element 3 inside the sealing convex ring, and the surface of the sealing convex ring 60 contacted with the sound absorbing element 3 is the sealing surface.

It should be noted that: the fixing protruding ring 61 is used to encapsulate the edge side of the sound-absorbing element 3 in the plastic structure formed by the glue, so that the fixing protruding ring 61 is used to press the sound-absorbing element 3 so that the corners of the sound-absorbing element 3 can be immersed in the glue, and thus, in some embodiments, the sound-absorbing element 3 does not need to be compressed to deform.

The surface of the fixing collar 61 contacting the sound absorbing element 3 is a fixing surface.

The contour of the fixing convex ring 61 may be designed to be matched with various shapes according to the contour of the surface of the sound absorbing member 3, and furthermore, the contour of the sealing convex ring 60 may be designed to be matched with triangle, quadrangle, pentagon, circle, semicircle, ellipse and other irregular shapes according to the contour of the sealing surface on the sound absorbing member 3.

Referring to fig. 1 and 2, in order to facilitate the threading and fixing of the sound absorbing element 3, the cavity surface of the first mold assembly 1 is provided with a plurality of pins 2 for threading the sound absorbing element 3, and in the axial direction of the pins 2, the upper ends of the pins 2 are in a shuttle-like structure with two thin ends and a thick middle, and the sound absorbing element 3 is more easily and firmly fixed on a thicker part of the upper ends of the pins 2.

The pin 2 may be a thimble in the mold or may be a fixed structure on the cavity surface of the first mold component 1.

The second die assembly 6 is provided with a plurality of point gates 4, after the first die assembly 1 and the second die assembly 6 are assembled, the sizing material enters the injection cavity along the point gates 4 and diffuses towards the periphery, and the sizing material stops at the sealing surface, so that the sizing material flows outside the sound absorbing element 3, and the sizing material is prevented from entering the surface of the sound absorbing element 3.

At the same time, the glue flows over the circumference of the fixing surface, encapsulating the edge side of the sound-absorbing element 3 in a plastic structure.

Referring to fig. 4, during demolding, the second mold assembly 6 is acted on the nozzle needle 7 to promote the point gate 4 to withdraw from demolding, and meanwhile, the ejector pin 5 on the second mold assembly 6 pushes against the plastic product to prevent the plastic product from being attached to the second mold assembly 6; finally, the plastic product is removed through the ejector pin in the first die assembly 1.

Embodiment two:

the embodiment provides a plastic product which is injection molded by the insert injection mold of the embodiment.

According to different application scenes, the plastic product can be of different structures, such as a pipeline or a shell with a sound absorption function.

In this embodiment, the plastic product is an air intake duct in an air cleaner system of an automobile, and the sound absorbing element 3 is embedded in the air intake duct

In addition, the sound absorbing element 3 may be made of cotton wool, foam, sponge, etc., and the sound absorbing element 3 is made of a sound absorbing sponge structure.

Furthermore, in one embodiment, the surface of the sound absorbing element 3 is provided with a plurality of reinforcing ribs, and the sealing convex ring 60 and the surface of the reinforcing ribs form a sealing surface.

It should be noted that the positional or positional relationship indicated by the terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the positional and positional relationship shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the scope of the present utility model. It will be apparent that the described embodiments are merely some, but not all, embodiments of the utility model. Based on these embodiments, all other embodiments that may be obtained by one of ordinary skill in the art without inventive effort are within the scope of the utility model.

Claims (8)

1. The inserts injection mold for plastic material and flexible sound absorbing element insert injection molding are plastic products, inserts injection mold includes relative first mould subassembly and second mould subassembly, first mould subassembly with form the chamber of moulding plastics between the second mould subassembly, its characterized in that:

the opposite surface of the second die assembly is provided with a closed-loop sealing convex ring and a closed-loop fixing convex ring, the height of the sealing convex ring is higher than that of the fixing convex ring, and the sealing convex ring is pressed on the sound-absorbing element at the inner side of the fixing convex ring so as to prevent sizing materials from flowing into the surface of the sound-absorbing element at the inner side of the sealing convex ring; the fixing convex ring is used for pressing the edge of the sound-absorbing element into the sizing material.

2. The insert injection mold of claim 1, wherein: the opposite surface of the second die assembly is a core surface, and the opposite surface of the first die assembly is a cavity surface.

3. The insert injection mold according to claim 1 or 2, characterized in that: the outline of the sealing convex ring is triangle, quadrangle, pentagon, circle, semicircle or ellipse.

4. The insert injection mold of claim 2, wherein: the cavity surface is provided with a plurality of pins for penetrating the sound absorbing element, and the upper ends of the pins are in a shuttle-shaped structure with two thin ends and a thick middle part in the axial direction of the pins.

5. A plastic article manufactured by the insert injection mold according to any one of claims 1 to 4, wherein: at least one side surface of the plastic product is embedded with a sound absorbing element.

6. The plastic article of claim 5, wherein: the sound absorbing element is a sound absorbing sponge.

7. The plastic article of claim 5, wherein: the surface of the sound absorbing element is provided with a plurality of reinforcing ribs.

8. The plastic article of claim 5, wherein: the plastic product is an air inlet pipeline in an automobile air filter system, and the sound absorbing element is embedded on the air inlet pipeline.

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