Injection mold cavity extraction device

Abstract

The utility model relates to injection mold maintenance and inspection technical field discloses a kind of injection mold cavity extraction devices, tooling hole is provided on cavity, tooling hole is with thread, including base, handle and connecting screw rod, the through hole for connecting screw rod to pass through is opened on the base, connecting screw rod can be screwed into tooling hole after passing through through hole and cooperate with tooling hole thread, handle is fixed on the side of base deviating from cavity. The utility model is according to the structural features of cavity, the base that can be fixedly connected with cavity is set outside cavity, handle is twisted and pulled on the base, so that the stress balance of cavity can be guaranteed, and the base is smoothly extracted.

Description

Technical Field

[0001] This utility model relates to the field of injection mold maintenance and inspection technology, and in particular to an injection mold cavity removal device. Background Technology

[0002] Injection molding is a method of producing molded plastic products, which commonly uses injection molding machines and molds. The injection molding machine injects molten plastic material into the mold cavity under high pressure, and after cooling and solidification, the molded plastic product is obtained.

[0003] During the use of injection molds, the mold cavity is a key component for directly molding plastic products. Due to long-term exposure to high temperature, high pressure, and the scouring effect of molten plastic, the cavity is prone to wear, cracks, and other damage, requiring timely replacement.

[0004] For cavities in injection molds that use a countersunk mounting method, as shown in the attached... Figure 1 As shown, the cavity 2 has four fixing holes 21. Four bolts pass through the fixing holes 21 and are screwed into the mold body 1 to install the cavity 2 onto the mold body 1. When the cavity 2 is damaged and needs to be removed, after loosening and removing the four bolts one by one, due to the installation position and structural characteristics of the cavity 2, it is not possible to directly use conventional clamps to remove the cavity 2 from the mold body 1. Therefore, two threaded tooling holes 22 are specially made on the cavity 2. The traditional manual removal method uses two long bolts that are threaded into the tooling holes 22. By continuously screwing the long bolts into the tooling holes 22, the reaction force of the long bolts on the cavity 2 is used to gradually push the cavity 2 out of the mold body 1.

[0005] This method is not only labor-intensive and inefficient, but also prone to further damage to cavity 2 due to uneven force exerted by the two long bolts during operation. Furthermore, because there is a certain friction and fitting precision between cavity 2 and mold body 1, simply relying on the long bolts for ejection may encounter difficulties, leading to an unsmooth removal process. Therefore, a specialized device needs to be designed to solve the problem of removing the countersunk cavity 2, in order to improve the efficiency and quality of cavity 2 removal. Utility Model Content

[0006] To address the problems existing in the prior art, where countersunk cavity installations are difficult to remove from the mold body when damaged and needing replacement, the purpose of this utility model is to provide a cavity removal device for injection molds. Based on the structural characteristics of the cavity, a base that can be fixedly connected to the cavity is set on the outside of the cavity. The base has a handle that can be twisted and pulled, thereby ensuring that the cavity is subjected to balanced force and the base can be removed smoothly.

[0007] To achieve the above objectives, the technical solution of this utility model is as follows: A device for removing a cavity from an injection mold includes a tooling hole on the cavity, the tooling hole having a thread, a base, a handle, and a connecting screw. The base has a through hole for the connecting screw to pass through, and the connecting screw can be screwed into the tooling hole after passing through the through hole and threaded into the tooling hole. The handle is fixed on the side of the base away from the cavity.

[0008] The present invention is further configured such that: at least two tooling holes are provided on the cavity, and the tooling holes are symmetrically or evenly distributed on the cavity about the center position of the cavity; the position and number of through holes on the base correspond to the position and number of tooling holes on the cavity; and the number of connecting screws is consistent with the number of tooling holes.

[0009] The present invention is further configured to include a positioning pin, which is fixed on the side of the base away from the handle. The cavity is also provided with a fixing hole. When the positioning pin can be inserted into the fixing hole, the through hole on the base is aligned with the tooling hole on the cavity.

[0010] The present invention is further configured such that: four fixing holes are evenly distributed on the cavity, and the position and number of the positioning pins correspond to the position and number of the fixing holes on the cavity.

[0011] The present invention is further configured such that: the handle is a long rod-shaped structure, and the middle position of the handle along its length is fixedly connected to the center position of the base.

[0012] The present invention is further configured to include a connecting column, the axis of which passes through the center line of the base, and the two ends of the connecting column are fixedly connected to the handle and the base, respectively.

[0013] The present invention is further configured such that one side of the base facing the cavity can be completely fitted with the surface of the cavity.

[0014] In summary, the beneficial effects achieved by this utility model are as follows: The extraction device in this invention employs a combination of a connecting screw, a positioning pin, and a handle. The positioning pin quickly and accurately positions the extraction device against the cavity, ensuring that the connecting screw can pass through the through hole on the base and screw into the threaded hole of the cavity. The connecting screw, through its engagement with a threaded tooling hole, secures the base to the cavity, allowing workers to directly pull the handle or reciprocate by twisting it to extract the cavity. This ensures the smoothness and accuracy of the extraction process and avoids damage and difficulty in extraction caused by uneven force on the cavity. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the specification will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0016] Figure 1 This is a schematic diagram of the structure of the mold body and the cavity in the background art of this utility model; Figure 2 This is a front view of the injection mold cavity removal device of this utility model; Figure 3 This is a side view of the connecting screw and the injection mold cavity removal device in this utility model; Figure 4 This is a top view of the injection mold cavity removal device of this utility model; Figure 5 This is a bottom view of the injection mold cavity removal device of this utility model.

[0017] In the diagram: 1. Mold body; 2. Cavity; 21. Fixing hole; 22. Tooling hole; 3. Base; 31. Through hole; 4. Positioning pin; 5. Handle; 51. Connecting post; 6. Connecting screw. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. For ease of explanation, the terms "vertical", "horizontal", "left", "right", "upper", "lower", "inner", "outer", "bottom", etc., used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0019] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] As attached Figure 1-5 As shown, a cavity removal device for injection molds is used to remove a cavity 2 that is installed and fixed on a mold body 1 from the mold body 1. The removal device includes a base 3, a positioning pin 4, a handle 5, and a connecting screw 6.

[0021] Both the mold body 1 and the cavity 2 are existing equipment, and their structures will not be described in detail here. The mold body 1 in the attached figure is a part of the structure of the injection mold.

[0022] In the prior art, the cavity 2 is provided with four fixing holes 21. Four bolts pass through the fixing holes 21 and are screwed into the mold body 1 to install the cavity 2 onto the mold body 1. Simultaneously, the cavity 2 also has two tooling holes 22 for removing the cavity 2 from the mold body 1. The tooling holes 22 are threaded. The two tooling holes 22 are symmetrically distributed about the center of the cavity 2. In some other embodiments, the number of tooling holes 22 may be three, four, or more, in which case all tooling holes 22 are evenly distributed around the center of the cavity 2.

[0023] The base 3 is a rectangular plate structure, with the positioning pin 4 and the handle 5 respectively located on the two sides of the base 3.

[0024] Two vertical through holes 31 are provided on the base 3, and the positions of the two through holes 31 correspond to the positions of the two tooling holes 22 on the cavity 2.

[0025] During the process of removing cavity 2, the side of the base 3 with positioning pin 4 faces cavity 2, and this side of the base 3 can completely fit the surface of cavity 2.

[0026] The number of connecting screws 6 is the same as the number of tooling holes 22, and the connecting screws 6 can be screwed into the tooling holes 22 and threaded into the tooling holes 22. When the base 3 is in contact with the cavity 2, the connecting screws 6 pass through the cavity 2 and are screwed into the tooling holes 22, thereby completing the fixed connection between the base 3 and the cavity 2.

[0027] Before removing cavity 2, the four bolts in the fixing holes 21 need to be loosened one by one and removed. After that, the fixing holes 21 can be used to insert the positioning pins 4. The positioning pins 4 are cylindrical columnar structures, vertically fixed to the bottom surface of the base 3. The position and number of positioning pins 4 correspond to the position and number of fixing holes 21 on cavity 2. In this embodiment, when all four positioning pins 4 are inserted into the fixing holes 21, it indicates that the through hole 31 on the base 3 and the tooling hole 22 on the cavity 2 have been aligned. The two connecting screws 6 can then be inserted into the tooling hole 22 and tightened to complete the connection and fixation between the base 3 and the cavity 2.

[0028] The handle 5 is a long rod-shaped structure. The middle position of the handle 5 along its length is fixedly connected to the center position of the base 3 through a connecting post 51. The axis of the connecting post 51 passes through the center line of the base 3, and the two ends of the connecting post 51 are fixedly connected to the handle 5 and the base 3 respectively.

[0029] After the connecting screw 6 is inserted into the tooling hole 22 and tightened, the base 3 and the cavity 2 are tightly fitted and fixed together. At this time, the worker can hold the handle 5 and pull the base 3 away from the cavity 2, thereby pulling the cavity 2 out simultaneously. Due to the certain friction and fitting precision between the cavity 2 and the mold body 1, the torque can be transmitted to the base 3 by repeatedly rotating the handle 5 during the pulling process. The torque is then transmitted from the base 3 to the cavity 2 through the four positioning pins 4 inserted into the fixing holes 21 and the connecting screw 6 inserted into the tooling holes 22. This causes the cavity 2 to rotate relative to the mold body 1, facilitating the smooth removal of the cavity 2. After the cavity 2 is removed, the connecting screw 6 is rotated in the opposite direction to separate the base 3 from the cavity 2.

[0030] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the present invention. Clearly, those skilled in the art can make various alterations and modifications to the present invention without departing from its spirit and scope. Thus, if such modifications and modifications fall within the scope of the claims of the present invention and their equivalents, the present invention also intends to include such modifications and modifications.

Claims

1. A device for removing a cavity from an injection mold, wherein a tooling hole (22) is provided on the cavity (2), and the tooling hole (22) is threaded, characterized in that, The device includes a base (3), a handle (5), and a connecting screw (6). The base (3) has a through hole (31) through which the connecting screw (6) passes. After passing through the through hole (31), the connecting screw (6) can be screwed into the tooling hole (22) and threaded into the tooling hole (22). The handle (5) is fixed on the side of the base (3) away from the cavity (2).

2. The injection mold cavity removal device according to claim 1, characterized in that, The cavity (2) is provided with at least two tooling holes (22), and the tooling holes (22) are symmetrically or evenly distributed on the cavity (2) about the center position of the cavity (2). The position and number of through holes (31) on the base (3) correspond to the position and number of tooling holes (22) on the cavity (2). Furthermore, the number of connecting screws (6) is consistent with the number of tooling holes (22).

3. The injection mold cavity removal device according to claim 1 or 2, characterized in that, It also includes a positioning pin (4), which is fixed on the side of the base (3) away from the handle (5). The cavity (2) is also provided with a fixing hole (21). When the positioning pin (4) can be inserted into the fixing hole (21), the through hole (31) on the base (3) is aligned with the tooling hole (22) on the cavity (2).

4. The injection mold cavity removal device according to claim 3, characterized in that, The cavity (2) has four fixing holes (21) evenly distributed on it, and the position and number of the positioning pins (4) correspond to the position and number of the fixing holes (21) on the cavity (2).

5. The injection mold cavity removal device according to claim 1, characterized in that, The handle (5) is a long rod-shaped structure, and the middle position of the handle (5) along its length is fixedly connected to the center position of the base (3).

6. The injection mold cavity removal device according to claim 5, characterized in that, It also includes a connecting post (51), the axis of which passes through the center line of the base (3), and the two ends of the connecting post (51) are fixedly connected to the handle (5) and the base (3) respectively.

7. The injection mold cavity removal device according to claim 1, characterized in that, The side of the base (3) facing the cavity (2) can be completely fitted with the surface of the cavity (2).

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