Three-plate mold injection mold
By introducing limit pins and limit rings into the three-plate injection mold, the instability caused by the springback of the rear platen was solved, achieving stability and safety in the mold opening process, avoiding interference and collisions from the robotic arm, and reducing maintenance costs.
Patent Information
- Application Number
- CN202423323609.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-12-30
AI Technical Summary
In traditional three-plate injection molds, the collision between the rear platen and the locating pin during the mold opening process causes unstable thrust, resulting in a long rebound even after the rear platen has moved into place. This may interfere with or collide with the robot arm, increasing maintenance costs and downtime.
Design a limiting structure including a limiting pin and a limiting ring. The limiting ring has a guide hole and a through hole. The through hole contains a limiting steel ball and an elastic structure to buffer the rebound force of the rear template and ensure that the rear template is stably positioned.
Through the design of the limiting structure, the rear template is stably positioned during the mold opening process, avoiding interference and collision with the robot arm, thereby improving production safety and reducing maintenance costs.
Smart Images
Figure CN223589978U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to three board mould injection mould field especially three board mould injection mould. BACKGROUND
[0002] Three board mould is a mould needing two stage mould opening, and is suitable for processing some more complex workpieces.
[0003] In the mould opening process of the traditional three board mould injection mould, the rear mould plate needs to be pushed away from the front mould plate, and the rear mould plate is limited by the limiting peg, but the rear mould plate and the limiting peg usually collide to generate unstable thrust, so that the rear mould plate still shakes back and forth after moving to the position. This situation can cause the rear mould plate to interfere with and collide with the manipulator when the manipulator clamps the material head formed by the cold runner of the mould, and safety accidents. Therefore, during the mould production process, more manpower is needed to monitor the movement process of the mould plate. The mould production speed is fast, and once the rear mould plate rebounds for a long distance, the manipulator will collide with the rear mould plate, the manipulator will malfunction and need to be repaired, and the maintenance cost of the manipulator and the mould and the time cost due to shutdown are increased.
[0004] Therefore, it is an urgent problem to design a three board mould injection mould which can avoid the rear mould plate from rebounding for a long distance at the end of the limiting peg and colliding with the manipulator after moving to the position during the mould opening process. CONTENT OF THE UTILITY MODEL
[0005] The purpose of the present application is to solve the problem of rebounding of the rear mould plate during the mould opening process in the prior art.
[0006] To achieve the above purpose, the present application provides a three board mould injection mould with a limiting structure, which comprises a fixed front mould plate, a rear mould plate moving relative to the front mould plate, and a limiting structure for limiting the rear mould plate, wherein the limiting structure comprises a limiting peg and a limiting ring matched therewith.
[0007] One end of the limiting peg is fixed on the front mould plate, and the other end is provided with a limiting groove;
[0008] The limiting ring is fixed on the rear mould plate and has a guide hole for inserting the limiting peg, a plurality of through holes are arranged in the side wall of the guide hole in a ring shape, a limiting steel ball is arranged in the through hole, and an elastic structure is arranged to embed the limiting steel ball partially into the limiting groove.
[0009] Further specifically, the elastic structure comprises a sealing groove connecting the plurality of through holes, and an elastic sealing ring arranged in the sealing groove.
[0010] Further specifically, the elastic structure comprises a spring arranged in the through hole, and a spring cap connected with the spring, and the spring cap is fixed on the limiting ring.
[0011] Further, the limiting pin comprises a fixed end and a limiting end, the fixed end is fixed to the front mold plate, the cross-sectional area of the limiting end is larger than that of the main body of the limiting pin, and the limiting groove is arranged on the limiting end.
[0012] Further, the plurality of through holes are annularly and uniformly distributed on the side wall of the limiting ring.
[0013] Further, the three-plate mold injection mold further comprises a material stirring plate, and the material stirring plate is connected to the rear mold plate through a mold locking structure.
[0014] Further, the material stirring plate is provided with a cold mold back plate on the side away from the rear mold plate.
[0015] Further, a spacer plate is further arranged between the material stirring plate and the cold mold back plate.
[0016] Further, the front mold plate is provided with a guide column, and the rear mold plate is provided with a guide hole corresponding to the guide column.
[0017] Further, the guide hole is provided with a cavity plate guide sleeve.
[0018] The beneficial effects of the present application are:
[0019] The present application greatly buffers the rebound force of the rear mold plate during mold opening by arranging the limiting ring for auxiliary limiting in the rear mold plate. After the rear mold plate is opened to the position, the elastic structure will partially embed the limiting steel ball in the limiting ring into the limiting groove, which can solve the problem that the rear mold plate is still unstable after being opened to the position and shakes back and forth. The three-plate mold injection mold designed in the present application is safe and reliable during mold opening, and the mold opening control is stable, and safety accidents such as interference and collision between the mechanical hand and the unstable rear mold plate will not occur. BRIEF DESCRIPTION OF DRAWINGS
[0020] Figure 1 is a sectional view of the limiting pin and the limiting ring in the present application;
[0021] Figure 2 is a three-dimensional schematic view of the limiting ring in the present application;
[0022] Figure 3 is a front view and a sectional view of the limiting ring in the present application;
[0023] Figure 4 is a schematic view of the limiting end of the limiting pin in the present application;
[0024] Figure 5 is a schematic view of the three-plate mold injection mold in the present application.
[0025] In the figure: 1, front template; 2, rear template; 3, material pushing plate; 4, backing plate; 5, cold mold back plate; 6, guide column; 7, cavity plate guide sleeve; 10, limiting nail; 11, fixed end; 12, limiting end; 13, limiting groove; 20, limiting ring; 21, guide hole; 22, through hole; 23, sealing groove; 24, limiting steel ball. DETAILED DESCRIPTION
[0026] The technical solutions of the present application will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.
[0027] In the description of the present application, it should be pointed out that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0028] In the description of the present application, it should be pointed out that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.
[0029] The present application provides a three-plate mold injection mold. Figure 5 As shown in the figure, the three-plate mold injection mold comprises a fixed front template 1 (also referred to as A plate), a rear template 2 (also referred to as B plate) moving opposite to the front template, a material pushing plate 3 (also referred to as C plate) for pushing material, and a limiting structure for solving the shaking of the rear template 2 after the mold is opened to position. Figure 1As shown, the limiting structure includes a limiting pin 10 and a cooperating limiting ring 20. Among them, the fixed end 11 of the limiting pin 10 is fixed on the front mold plate 1. The fixed end 11 can be fixed on the front mold plate 1 by setting a threaded connection, or can be fixed on the front mold plate 1 by other structures or by welding and the like. The other end of the limiting pin 10 is a limiting end 12. As shown Figure 4 The limiting end 12 is the head part of the limiting pin 10. The cross-sectional area of the limiting end 12 is larger than that of the shank of the limiting pin 10. The limiting end 12 is provided with a limiting groove 13. The limiting ring 20 is fixed on the rear mold plate 2 and has a guide hole 21 corresponding to the limiting pin 10. When the rear mold plate 2 moves during mold opening, it drives the limiting ring 20 to move on the limiting pin 10.
[0030] As shown Figure 2 The curved side wall of the limiting ring 20 is provided with a plurality of through holes 22 arranged in a ring shape, each of which is provided with a limiting steel ball 24 and an elastic structure for embedding the limiting steel ball 24 partially in the limiting groove 13. The through hole 22 communicates the guide hole 21 of the limiting ring 20 with the outside from the side. The end of the through hole 22 close to the guide hole 21 has a structure that is gathered inward to prevent the limiting steel ball 24 from falling out. The number of through holes 22 can be 4, 5, 6, 7, 8 or more. In order to ensure stable limiting effect, preferably, the through holes 22 are evenly distributed in a ring shape on the curved side wall of the limiting ring 20. During the opening movement of the rear mold plate 2, when the rear mold plate 2 moves to the position, the elastic structure partially embeds the limiting steel ball 24 in the limiting groove 13. At this time, the rear mold plate 2 is further limited to shake, greatly reducing the rebound distance, and can solve the problem of interference or collision between the rear mold plate 2 and the mechanical hand during mold opening.
[0031] As shown Figure 2 And Figure 3 In some embodiments, the elastic structure includes a sealing groove 23 connecting a plurality of through holes 22, and an elastic sealing ring arranged in the sealing groove 23. When the rear mold plate 2 moves to the position corresponding to the limiting groove 13 of the limiting pin 10, the elastic sealing ring can partially embed the limiting steel ball 24 in the limiting groove 13.
[0032] In some embodiments, the elastic structure includes a spring arranged in the through hole 22, and a spring cap connected with the spring. The spring cap is fixed on the limiting ring. The spring cap and the through hole 22 can be fixedly connected by a threaded structure. When the rear mold plate 2 moves to the position corresponding to the limiting groove 13 of the limiting pin 10, the spring can partially embed the limiting steel ball 24 in the limiting groove 13.
[0033] As shown Figure 5As shown, in some specific embodiments, the material stirring plate 3 is connected with the back mold plate 2 through the mold locking structure, and the material stirring plate 3 is provided with a cold mold back plate 5 on the side away from the back mold plate 2. A gasket 4 is further arranged between the material stirring plate 3 and the cold mold back plate 5. In some specific embodiments, the front mold plate 1 is provided with a guide column 6, and the back mold plate 2 is provided with a guide hole corresponding to the guide column 6. A cavity plate guide sleeve 7 is arranged on the guide hole, and in the mold opening process, the back mold plate 2 moves on the guide column 6 by means of the cavity plate guide sleeve 7.
[0034] In the mold opening process of the traditional three-plate mold injection mold, the rebound force of the back mold plate 2 is completely offset by the friction force between the guide sleeve and the guide column 6, but the rebound force cannot be completely offset by the friction force between the guide sleeve and the guide column 6. The structure of the limiting pin 10 is improved, and the limiting ring 20 is added to the back mold plate 2, and the limiting groove 13 in the limiting pin 10 is matched with the limiting ring 20. In the mold opening process, when the back mold plate 2 moves to the corresponding position of the limiting groove 13, the limiting steel ball 24 in the limiting ring 20 fixed in the back mold plate 2 is embedded in the limiting groove 13 by the elastic structure part, at this time, the rebound force of the back mold plate 2 is well offset by the limiting steel ball 24 and the elastic structure, and the problem that the back mold plate 2 may interfere with the mechanical hand is solved.
[0035] The embodiments of the utility model are described in detail above, but the utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, replacements and modifications can be made to these embodiments without departing from the principles and spirits of the utility model, and still fall within the protection scope of the utility model.
Claims
1. A three-plate injection mold, characterized in that, It includes a fixed front template, a rear template that moves relative to the front template, and a limiting structure for limiting the rear template. The limiting structure includes a limiting pin and a matching limiting ring. One end of the limiting pin is fixed to the front template, and the other end is provided with a limiting groove; The limiting ring is fixed to the rear template and has a guide hole for the insertion of the limiting pin. The side wall of the guide hole has several through holes distributed in a ring, a limiting steel ball disposed in the through hole, and an elastic structure that partially embeds the limiting steel ball into the limiting groove.
2. The three-plate injection mold according to claim 1, characterized in that, The elastic structure includes a sealing groove that connects a plurality of the through holes, and an elastic sealing ring disposed within the sealing groove.
3. The three-plate injection mold according to claim 1, characterized in that, The elastic structure includes a spring disposed in the through hole and a spring cap connected to the spring, the spring cap being fixed on the limiting ring.
4. The three-plate injection mold according to claim 1, characterized in that, The limiting pin includes a fixed end and a limiting end. The fixed end is fixed to the front template, and the cross-sectional area of the limiting end is larger than the cross-sectional area of the limiting pin body. The limiting groove is provided on the limiting end.
5. The three-plate injection mold according to claim 1, characterized in that, Several through holes are evenly distributed in a ring on the side wall of the limiting ring.
6. The three-plate injection mold according to claim 1, characterized in that, It also includes a material-pulling plate, which is connected to the rear template via a mold-locking structure.
7. The three-plate injection mold according to claim 6, characterized in that, A cold mold back plate is provided on the side of the material feeding plate away from the rear template.
8. The three-plate injection mold according to claim 7, characterized in that, A pad is also provided between the material feeding plate and the cold mold back plate.
9. The three-plate injection mold according to claim 1, characterized in that, The front template is provided with guide posts, and the rear template is provided with guide holes corresponding to the guide posts.
10. The three-plate injection mold according to claim 9, characterized in that, A cavity plate guide sleeve is provided on the guide hole.