Novel active feed shrinkage mold structure

Abstract

The utility model discloses a novel active feed shrinkage mould structure, which relates to the technical field of injection moulds, and comprises a female mould and a male mould which can move up and down relative to the female mould and can be combined with the female mould, a mould cavity is concavely arranged on a mould combining surface of the female mould, and a mould core matched with the mould cavity in shape is convexly arranged on a mould combining surface of the male mould. The top of the male mold is further provided with a pouring gate used for injecting sizing materials into a forming space formed after the male mold and the female mold are assembled, and an insert capable of entering or exiting from the forming space is arranged in the male mold in a sealed mode. The tail end of the insert enters the forming space; and when the pouring gate stops injecting the sizing material into the forming space, the tail end of the insert retreats from the forming space. According to the utility model, the sizing material can be effectively guided to uniformly fill the forming space, and the problems of generation of air holes and incomplete filling are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection mold technical field, especially a kind of novel active feed shrinkage mold structure. BACKGROUND

[0002] With the continuous development of electronic product technology, consumers' requirements for product appearance design and quality are higher and higher, especially higher standards for the meticulous degree and delicate degree of appearance. As an important manufacturing process, injection molding has been widely used in the production of electronic products.

[0003] In the traditional injection molding process, the glue starts to fill from the glue inlet, and gradually solidifies in the mold cavity. Ideally, the glue thickness of the injection molded part should be consistent, usually 2.5 to 3 mm. However, for some specifically designed products, especially electronic products with complex structure or larger glue position, the glue position can reach 7 to 8 mm. Because the glue position is large, the injection molded part will experience a longer flow during filling, which may cause significant glue shrinkage in the area of the mold cavity far from the glue inlet. This shrinkage usually manifests as a smaller glue position at the end of the product than at the beginning, resulting in bubbles and pores on the surface of the molded product. Not only will this affect the appearance of the product, making it look rough and poor in quality, but it may also affect the strength, durability and functional performance of the product, and even reduce the service life of the product.

[0004] Therefore, how to improve the uniformity of glue filling and avoid bubbles on the surface of the product is a technical problem that needs to be solved. INVENTION CONTENTS

[0005] The utility model provides a kind of novel active feed shrinkage mold structure, to solve the technical problems proposed in the above background technology.

[0006] To solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A kind of novel active feed shrinkage mold structure, including female die and the male die that can be moved up and down relative to female die and can be combined with female die, the combined surface of the female die is concave and provided with mold cavity, the combined surface of the male die is convex and provided with with the shape of the mold cavity Mould core, and the top of the male die is also provided with sprue for injecting glue into the forming space formed after the male die is combined with the female die, the inside of the male die is sealed and provided with insert that can enter or exit the forming space, when the sprue starts to inject glue into the forming space, the end of the insert enters the forming space;When the sprue stops injecting glue into the forming space, the end of the insert exits the forming space.

[0008] Further, the public mold is internally provided with a first driving unit, and an output end of the first driving unit is provided with the insert.

[0009] Further, the insert comprises a base connected with the first driving unit, and at least one insert rod is vertically arranged on one side of the base away from the first driving unit.

[0010] Further, the insert rod is rectangular, circular or multi-shaped.

[0011] Further, the first driving unit is sequentially concavely provided with a first sealing groove, a second sealing groove and a third sealing groove from top to bottom, and the first sealing groove, the second sealing groove and the third sealing groove are respectively correspondingly provided with a first sealing ring, a second sealing ring and a third sealing ring.

[0012] Further, the first driving unit is a pneumatic cylinder.

[0013] From the description of the structure of the utility model, the utility model has the following advantages:

[0014] The utility model discloses a mold structure, which comprises a public mold and an insert. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the whole structure schematic diagram of the utility model.

[0016] Figure 2 It is the structure schematic diagram of the first driving unit and the insert of the utility model.

[0017] Figure 3 It is the position structure schematic diagram of the insert rod when the pouring gate starts to inject glue.

[0018] Figure 4 It is the position structure schematic diagram of the insert rod when the pouring gate injects glue halfway.

[0019] Figure 5 It is the position structure schematic diagram of the insert rod when the pouring gate injects glue.

[0020] Reference Signs: 10-pouring gate; 20-insert; 21-base; 22-insert rod; 30-first driving unit; 31-first sealing groove; 32-second sealing groove; 33-third sealing groove. DETAILED DESCRIPTION

[0021] The technical scheme of the utility model will be described clearly and completely in connection with the drawings below, obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments.

[0022] Referring to Figures 1 to 5 A novel active feeding mold structure, comprising a female mold (not shown in the figure) and a male mold (not shown in the figure) which can move up and down relative to the female mold and can be combined with the female mold, the combined surface of the female mold is concavely provided with a mold cavity, the combined surface of the male mold is convexly provided with a core which is in shape with the mold cavity, and the top of the male mold is further provided with a runner 10 for injecting rubber into the forming space formed after the male mold is combined with the female mold, the inside of the male mold is hermetically provided with an insert 20 which can enter or exit the forming space, when the runner 10 starts to inject rubber into the forming space, the end of the insert 20 enters the forming space, referring to Figure 3 , the flow direction of the rubber is shown by the arrow in the figure; when the runner 10 starts to inject rubber into the forming space, the end of the insert 20 gradually exits the forming space, referring to Figure 4 ; when the runner 10 stops injecting rubber into the forming space, the end of the insert 20 completely exits the forming space, referring to Figure 5 .

[0023] By setting the insert 20 which can enter or exit the forming space in the mold, the flow direction and filling process of the rubber can be effectively controlled, when injecting rubber, the end of the insert 20 first enters the forming space and forms a gap between the end of the insert 20 and the bottom wall of the mold cavity of the female mold for the flow of the rubber, with the progress of the injection process, the insert 20 gradually exits the forming space, thereby guiding the rubber to uniformly fill the forming space, avoiding the problems of air hole generation or incomplete filling, and improving the forming precision of the final product.

[0024] Referring to Figures 1 to 5 , the inside of the male mold is provided with a first driving unit 30, the output end of the first driving unit 30 is provided with the insert 20, the insert 20 comprises a base 21 connected with the first driving unit 30, one side of the base 21 away from the first driving unit 30 is vertically provided with two spaced-apart insert rods 22, the insert rods 22 can be rectangular, circular or multi-shaped, through this design, the insert 20 can enter or exit the forming space flexibly in the injection process according to the driving of the first driving unit 30, thereby effectively controlling the flow and filling of the rubber, optimizing the forming process, improving the quality and precision of the final product, and the design of the multi-shaped insert rods 22 can also be applied to different types of injection molding requirements, greatly improving the flexibility and adaptability of the mold.

[0025] Referring to Figures 1 to 3In the embodiment, the first driving unit 30 is a cylinder, and the outer wall of the first driving unit 30 is concave with a first sealing groove 31, a second sealing groove 32 and a third sealing groove 33 from top to bottom in sequence, and the first sealing groove 31, the second sealing groove 32 and the third sealing groove 33 are respectively provided with a first sealing ring (not shown in the figure), a second sealing ring (not shown in the figure) and a third sealing ring (not shown in the figure) correspondingly, the sealing performance of the first driving unit 30 in the running process can be ensured by setting the multiple sealing grooves and the sealing rings, and the stability of the glue injection process is improved.

[0026] With reference to Figures 1 to 5 The utility model discloses a mould insert 20 that can enter or exit the forming space is arranged in the mould, and the flowing direction and filling process of the glue material can be effectively controlled, the glue material is uniformly filled in the forming space by setting the mould insert 20, the problems of air hole generation and incomplete filling are avoided, and the forming precision of the final product is improved, and the stability and consistency of the forming quality are ensured.

[0027] The above is only the specific embodiment of the utility model, but the design concept of the utility model does not limit to this, and the non-essential change of the utility model by using this concept should belong to the act of infringing the protection scope of the utility model.

Claims

1. A novel active feed shrinkage mold structure, comprising a female mold and a male mold which can move up and down relative to the female mold and can be combined with the female mold, a mold cavity is concavely arranged on the combined surface of the female mold, a mold core which is consistent with the shape of the mold cavity is convexly arranged on the combined surface of the male mold, and a runner for injecting rubber into the forming space formed after the male mold is combined with the female mold is further arranged on the top of the male mold, characterized in that: The inside of the male mold is provided with an insert piece which can enter or exit the molding space, and the end of the insert piece enters the molding space before the runner starts to inject rubber into the molding space; When the runner stops injecting rubber into the molding space, the end of the insert piece exits the molding space.

2. The novel active feedblock die structure according to claim 1, characterized in that: The inside of the male mold is provided with a first driving unit, and the output end of the first driving unit is provided with the insert piece.

3. The novel active feedblock die structure of claim 2, wherein: The insert piece comprises a base connected with the first driving unit, and at least one insert rod is vertically arranged on the side of the base away from the first driving unit.

4. The novel active feedblock die structure of claim 3, wherein: The insert rod is rectangular, circular or multi-shaped.

5. The novel active feedblock die structure according to claim 2 or 3, characterized in that: The first driving unit is sequentially provided with a first sealing groove, a second sealing groove and a third sealing groove from top to bottom, and the first sealing groove, the second sealing groove and the third sealing groove are respectively provided with a first sealing ring, a second sealing ring and a third sealing ring.

6. The novel active feedblock die structure of claim 5, wherein: The first driving unit is a pneumatic cylinder.

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