A screw thread rotation core pulling mechanism

Abstract

The utility model discloses a screw thread rotation core-pulling mechanism, including mould body, be provided with cavity in the mould body, the one side middle part of mould body is installed with first oil cylinder, just the sliding connection of cavity has the sliding block, the piston rod end of first oil cylinder is fixedly connected with the middle part of the lateral wall of sliding block, both ends of sliding block all are provided with the notching, just both ends of sliding block all are through bearing swing joint with screw thread insert piece. The utility model makes the injection molding of product realize automatic core-pulling stripping, save time and labour, and work efficiency is high, realizes the core-pulling stripping of the internal thread of plastic part through the spin and linear movement of screw thread insert piece, and the structure is simple, convenient operation, and sliding block can configure two screw thread insert pieces, can carry out core-pulling stripping to two plastic parts simultaneously, improves work efficiency, and the occupied space is small, and reduces injection moulding production cost.

Description

Technical Field

[0001] This utility model belongs to the field of injection mold technology, and in particular relates to a threaded rotating core-pulling mechanism. Background Technology

[0002] Plastic parts with internal thread structures are ubiquitous across various industries. The molding and demolding of internal thread structures typically employs an external threaded core with a rotating core-pulling mechanism. The traditional solution involves manually rotating the core to remove it from the product. After injection molding, the insert and product are removed together from the mold, and then the threaded insert is extracted using a jig. This process is cumbersome, physically demanding, and reduces production efficiency. Utility Model Content

[0003] The purpose of this utility model is to provide a threaded rotary core-pulling mechanism to solve the technical problems mentioned in the background art.

[0004] To achieve the above objectives, the specific technical solution of this utility model is as follows: A threaded rotary core-pulling mechanism includes a mold body, a cavity is provided inside the mold body, a first hydraulic cylinder is installed at the middle part of one side of the mold body, and a slider is slidably connected in the cavity. The piston rod end of the first hydraulic cylinder is fixedly connected to the middle part of the side wall of the slider. Notches are provided at both ends of the slider, and threaded inserts are rotatably connected to both ends of the slider through bearings. A second hydraulic cylinder is provided on the upper surface of both ends of the slider. The second hydraulic cylinder drives the threaded inserts to rotate through a gear mechanism. The gear mechanism is located within the notch, and an angle limiting structure is provided between the end of the threaded insert and the slider to limit the rotation angle of the threaded insert.

[0005] Preferably, a support plate is provided at the end of the cavity away from the first oil cylinder, and V-shaped grooves corresponding to the threaded inserts are provided on both sides of the upper surface of the support plate.

[0006] Preferably, the length direction of the first hydraulic cylinder is perpendicular to the length direction of the second hydraulic cylinder.

[0007] Preferably, the gear mechanism includes a gear and a rack. The gear is sleeved on a threaded insert, and the top end of the rack is fixedly connected to the bottom of the piston rod of the second cylinder. The gear and the rack are in rolling connection and mesh with each other.

[0008] Preferably, a limiting groove is provided in the middle part of the side of the rack away from the gear along its vertical direction, and a horizontally distributed limiting rod is provided in the middle part of the slider, and both ends of the limiting rod extend into the limiting groove and slide vertically connected with the limiting groove.

[0009] Preferably, the angle limiting structure includes a rotating block, which is fixedly connected to the end of the threaded insert. The side wall of the slider is provided with an arc-shaped groove for accommodating the rotating block, and a stop is provided on one side of the arc-shaped groove. The side wall of the slider is fixedly connected to a stop block by bolts on one side of the arc-shaped groove.

[0010] The threaded rotary core-pulling mechanism of this utility model has the following advantages:

[0011] 1. This utility model enables automatic core pulling and demolding of injection molding products, saving time and effort, and increasing work efficiency. It achieves core pulling and demolding of the internal threads of the plastic part through the self-rotation and linear movement of the threaded insert. The structure is simple and easy to operate. Moreover, the slider can be equipped with two threaded inserts, which can simultaneously perform core pulling and demolding of two plastic parts, improving work efficiency, occupying little space, and reducing injection molding production costs.

[0012] 2. Through the cooperation between the rotating block, the arc groove, and the stop, when the gear drives the threaded insert to rotate, the rotating block will rotate with the threaded insert. When one end of the rotating block rotates to the stop, the stop will block the rotating block, thereby limiting the rotation angle of the threaded insert. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0014] Fig. 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Fig. 2 This is a top view of the mold body in this utility model;

[0016] Fig. 3 This is a schematic diagram of the gear mechanism in this utility model.

[0017] The markings in the diagram are as follows: 1. Mold body; 2. First oil cylinder; 3. Slider; 4. Second oil cylinder; 5. Notch; 6. Gear; 7. Stop block; 8. Threaded insert; 9. Support plate; 10. Rack; 11. Limiting groove; 12. Limiting rod; 13. Arc groove; 14. Stop; 15. Rotating block. Detailed Implementation

[0018] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0019] In the description of the embodiments of this utility model, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model 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 the embodiments of this utility model.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0022] The following disclosure provides many different implementations or examples for different structures of the embodiments of the present invention. To simplify the disclosure of the embodiments of the present invention, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. Furthermore, reference numerals and / or reference letters may be repeated in different examples of the embodiments of the present invention; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.

[0023] To better understand the purpose, structure, and function of this utility model, the following description, in conjunction with the accompanying drawings, provides a more detailed account of a threaded rotary core-pulling mechanism of this utility model.

[0024] like Figs. 1-3As shown, this utility model discloses a threaded rotary core-pulling mechanism, comprising a mold body 1, a cavity within the mold body 1, a first hydraulic cylinder 2 mounted on the middle of one side of the mold body 1, and a slider 3 slidably connected within the cavity. The piston rod end of the first hydraulic cylinder 2 is fixedly connected to the middle of the side wall of the slider 3. Both ends of the slider 3 are provided with notches 5, and both ends of the slider 3 are rotatably connected to threaded inserts 8 via bearings. A support plate 9 is provided at the end of the cavity away from the first hydraulic cylinder 2. V-shaped grooves corresponding to the threaded inserts 8 are provided on both sides of the upper surface of the support plate 9, and the threaded inserts 8 are provided with threads at the V-shaped grooves. A second hydraulic cylinder 4 is provided on the upper surface of both ends of the slider 3. The second hydraulic cylinder 4 drives the threaded inserts 8 to rotate via a gear mechanism located within the notches 5, and an angle limiting structure is provided between the end of the threaded insert 8 and the slider 3 to limit the rotation angle of the threaded insert 8. The angle limiting structure includes a rotating block 15, which is fixedly connected to the end of the threaded insert 8. The side wall of the slider 3 is provided with an arc-shaped groove 13 for accommodating the rotating block 15, and a stop 14 is provided on one side of the arc-shaped groove 13. A stop 7 is fixedly connected to the side wall of the slider 3 on one side of the arc-shaped groove 13 by bolts. Through the cooperation between the rotating block 15, the arc-shaped groove 13 and the stop 14, when the gear 6 drives the threaded insert 8 to rotate, the rotating block 15 will rotate with the threaded insert 8. When one end of the rotating block 15 rotates to the stop 14, the stop 14 will block the rotating block 15, thereby limiting the rotation angle of the threaded insert 8.

[0025] The gear mechanism includes a gear 6 and a rack 10. The gear 6 is sleeved on the threaded insert 8. The top end of the rack 10 is fixedly connected to the bottom of the piston rod of the second cylinder 4, and the gear 6 and rack 10 are in rolling contact and mesh with each other. A limiting groove 11 is provided vertically in the middle part of the side of the rack 10 away from the gear 6. A horizontally distributed limiting rod 12 is provided in the middle part of the slider 3, and both ends of the limiting rod 12 extend into the limiting groove 11 and slide vertically connected with the limiting groove 11. Through the cooperation between the limiting rod 12 and the limiting groove 11, the rack 10 is effectively limited. The length direction of the first cylinder 2 is perpendicular to the length direction of the second cylinder 4. The first cylinder 2 is used to drive the slider 3 forward or backward, so that the threaded insert 8 moves with the slider 3. The second cylinder 4 is used to drive the rack 10 to move up and down, so that the rack 10 drives the gear 6 to rotate, so that the gear 6 drives the threaded insert 8 to rotate.

[0026] The working principle of the screw thread rotating core pulling mechanism is as follows: After the injection molding machine is formed, the mold is opened and the second oil cylinder 4 is started, so that the rack 10 drives the gear 6 to rotate, thereby causing the screw thread insert 8 to rotate with the gear 6 until it stops at the limit position. At this time, the screw thread forming part rotates and separates from the product. Then, the equipment signal controls the first oil cylinder 2 to pull the entire slider 3, so that the screw thread insert 8 moves with the slider 3 and separates from the entire product.

[0027] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A threaded rotary core-pulling mechanism, characterized in that: The mold body (1) includes a cavity. A first oil cylinder (2) is installed in the middle part of one side of the mold body (1), and a slider (3) is slidably connected in the cavity. The piston rod end of the first oil cylinder (2) is fixedly connected to the middle part of the side wall of the slider (3). Both ends of the slider (3) are provided with notches (5), and both ends of the slider (3) are rotatably connected with threaded inserts (8) through bearings. A second oil cylinder (4) is provided on the upper surface of both ends of the slider (3). The second oil cylinder (4) drives the threaded inserts (8) to rotate through a gear mechanism. The gear mechanism is located in the notch (5), and an angle limiting structure is provided between the end of the threaded inserts (8) and the slider (3) to limit the rotation angle of the threaded inserts (8).

2. The threaded rotary core-pulling mechanism according to claim 1, characterized in that: A support plate (9) is provided at the end of the cavity away from the first oil cylinder (2). V-shaped grooves corresponding to the threaded inserts (8) are provided on both sides of the upper surface of the support plate (9).

3. The threaded rotary core-pulling mechanism according to claim 1, characterized in that: The length direction of the first oil cylinder (2) is perpendicular to the length direction of the second oil cylinder (4).

4. The threaded rotary core-pulling mechanism according to claim 1, characterized in that: The gear mechanism includes a gear (6) and a rack (10). The gear (6) is fitted onto a threaded insert (8). The top of the rack (10) is fixedly connected to the bottom of the piston rod of the second oil cylinder (4). The gear (6) and the rack (10) are in rolling connection and mesh with each other.

5. A threaded rotary core-pulling mechanism according to claim 4, characterized in that: A limiting groove (11) is provided in the middle part of the side of the rack (10) away from the gear (6) along its vertical direction. A limiting rod (12) is provided in the middle part of the slider (3) and both ends of the limiting rod (12) extend into the limiting groove (11) and slide up and down with the limiting groove (11).

6. The threaded rotary core-pulling mechanism according to claim 1, characterized in that: The angle limiting structure includes a rotating block (15), which is fixedly connected to the end of the threaded insert (8). The side wall of the slider (3) is provided with an arc-shaped groove (13) for accommodating the rotating block (15), and a stop (14) is provided on one side of the arc-shaped groove (13). The side wall of the slider (3) is located on one side of the arc-shaped groove (13) and a stop (7) is fixedly connected to it by bolts.

Images