Movable mold core-pulling mechanism of mold
By adopting a dual guide mechanism of the guide rod and the guide foot in the mold core extraction mechanism, combined with the height sensor and buffer spring, the problems of unstable core extraction and inaccurate core position are solved, and the regularity and depth of the cavity on the injection molded parts are guaranteed.
Patent Information
- Application Number
- CN202420555090.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-20
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-03-20
AI Technical Summary
When the existing mold core extraction mechanism controls the movement of the core, there are problems such as unstable core extraction or inaccurate core reaching the core in the mold cavity, resulting in irregular cavity or insufficient depth on the injection molded parts.
A mold moving mold core extraction mechanism is designed, using a dual guide mechanism of the guide rod and the guide foot, combined with a height sensor and a buffer spring to ensure the stability and accuracy of the core in the mold cavity.
Through the cooperation of the dual-guiding mechanism and the height sensor, the stable movement and precise position of the core in the mold cavity are ensured, and the problems of irregular cavity and insufficient depth are avoided.
Smart Images
Figure CN222571502U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of mold structures, in particular to a core-pulling mechanism for a movable mold. Background Art
[0002] Mold core pulling is a technique in the plastic injection molding process used to produce plastic parts with complex internal structures. In this process, the core pulling mechanism can remove the core in the mold during or after injection to form the internal cavity or complex shape of the plastic part.
[0003] The core pulling process is usually carried out in the following two situations:
[0004] Core pulling during molding: During the injection process, when the plastic begins to fill the mold cavity, the core pulling mechanism acts to move the core outward, so that the gap inside the cavity is filled with plastic. This method is often used to manufacture plastic parts with nested structures or hidden cavities.
[0005] Core pulling after molding: After injection molding is completed, the plastic part cools and solidifies. At this time, the core pulling mechanism is activated to remove the core and take out the complete plastic part. This method is mostly used in the production of plastic parts with more complex internal structures.
[0006] The design and operation of the core pulling mechanism are of great significance to ensure the quality of plastic parts, improve production efficiency, and reduce mold and production costs. The core pulling process requires precise control to ensure the dimensional accuracy, surface quality and internal structural integrity of plastic parts.
[0007] The core pulling mechanism of the mold generally includes a core body and a driving part that controls the movement of the core body. When the core body moves, the accuracy of its position in the mold cavity and the stability of its exit are very important. At present, some core pulling mechanisms have problems such as unstable core pulling or inaccurate position of the core body in the mold cavity when controlling the movement of the core body. If the core body is unstable, it is easy to cause irregular cavity problems on the injection molded part. If the core body is inaccurately positioned in the mold cavity, it is easy to have a problem of insufficient cavity depth on the injection molded part. Utility Model Content
[0008] The utility model aims to solve the defects in the prior art and provide a core pulling mechanism for a movable mold.
[0009] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:
[0010] A core pulling mechanism for a movable mold of a mold, comprising a core body arranged in a mold cavity, a supporting foot connected to the core body, a fixed block arranged at one side of the supporting foot and connected to a fixed mold, a guide groove being arranged on the fixed block, and a guide foot corresponding to the guide groove being arranged at the end of the supporting foot, the guide foot being suitable for being inserted into the guide groove;
[0011] The core body comprises a core body main body part and a core body connecting part, the peripheral surface of the core body main body part is an arc surface, and the core body main body part is arranged in the mold cavity;
[0012] A placement opening is arranged on the side of the core body connection part, one end of the support foot away from the guide foot is fixedly connected to the inner wall of the placement opening, a height sensor is arranged in the placement opening, and the core body is suitable for lifting and lowering in the mold cavity.
[0013] Furthermore, the fixed mold is arranged at the bottom of the mold cavity, a plurality of guide rods are arranged on the fixed mold, a plurality of guide holes corresponding to the guide rods are arranged on the core body, and the ends of the guide rods pass through the guide holes.
[0014] Furthermore, a driving member connected to the core body is provided on the fixed mold.
[0015] Furthermore, arc-shaped guide grooves are provided on both sides of the guide foot, and arc-shaped guide flanges matching the arc-shaped guide grooves are provided on the inner walls of the guide grooves.
[0016] Furthermore, a fixing rod is connected to the fixing block, and an end of the fixing rod is connected to the fixed mold via a first buffer spring.
[0017] Furthermore, the side surface of the fixed block is connected to the second buffer spring, and the end of the second buffer spring is connected to the fixed mold.
[0018] Furthermore, the core body portion and the core body connecting portion are integrally formed.
[0019] Furthermore, the extending direction of the guide groove is consistent with the lifting direction of the core body in the mold cavity.
[0020] The beneficial effects of the utility model are as follows: when the core pulling mechanism provided by the application is in use, the driving member controls the core body to extend into the mold cavity. During the movement of the core body, the guide rods penetrated through the core body guide the core body. At the same time, the guide feet at the ends of the supporting feet on the side of the core body are inserted into the guide grooves of the fixed blocks. The sliding cooperation between the guide grooves and the guide feet also guides the moving core body stably, thereby ensuring the stability of the movement of the core body. The guide feet on the side of the core body have both a guiding role and a stable supporting role. As the core body enters the mold cavity After that, it is located at the end of the guide rod. The axial limit strength of the guide rod on the core body is not high. When the molten material is injected into the mold cavity, the core body will be squeezed. At this time, the support feet and guide feet on the side of the core body can use the fixed block to apply axial support force to the core body to ensure the stability and placement strength of the core body in the mold cavity. Similarly, when the driving part controls the core body to withdraw from the mold cavity, under the dual guiding action of the guide feet and the guide rod, the core body will not shake when it withdraws from the mold cavity, avoiding the problem of irregular cavity on the injection molded part in the mold cavity.
[0021] In addition, an installation opening is provided on the side of the core connection part, and a height sensor is provided in the installation opening. When the core is extended into the mold cavity, the height sensor can detect the height position of the core, and the problem of inaccurate arrival of the core in the mold cavity will not occur. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 This is a schematic diagram of the structure of the utility model from a first perspective;
[0023] Figure 2 This is a schematic diagram of the structure of the utility model from a second viewing angle;
[0024] Figure 3 This is a schematic diagram of the structure of the utility model from a third viewing angle;
[0025] Figure 4 It is a partial structural schematic diagram of the utility model.
[0026] Explanation of the accompanying drawings: 1. core body; 11. core body main body; 12. core body connecting part; 2. supporting foot; 3. fixing block; 4. guide groove; 5. guide foot; 6. height sensor; 7. guide rod; 8. guide hole; 9. arc-shaped guide groove; 10. arc-shaped guide flange; 20. fixing rod; 21. first buffer spring; 22. second buffer spring. DETAILED DESCRIPTION
[0027] Reference Figures 1 to 3 A core pulling mechanism for a movable mold of a mold, comprising a core body 1 arranged in a mold cavity, a supporting foot 2 connected to the core body 1, a fixed block 3 arranged at one side of the supporting foot 2 and connected to a fixed mold, a guide groove 4 being arranged on the fixed block 3, a guide foot 5 corresponding to the guide groove 4 being arranged at the end of the supporting foot 2, the guide foot 5 being suitable for being inserted into the guide groove 4, and a driving member connected to the core body being arranged on the fixed mold;
[0028] The core body 1 comprises a core body main body portion 11 and a core body connecting portion 12. The peripheral surface of the core body main body portion 11 is an arc surface, and the core body main body portion 11 is arranged in the mold cavity;
[0029] A placement opening 13 is provided on the side of the core body connection part 12, and one end of the support foot 2 away from the guide foot 5 is fixedly connected to the inner wall of the placement opening 13. A height sensor 6 is provided in the placement opening 13, and the core body 1 is suitable for lifting and lowering in the mold cavity.
[0030] Furthermore, the fixed mold is arranged at the bottom of the mold cavity, a plurality of guide rods 7 are arranged on the fixed mold, a plurality of guide holes 8 corresponding to the guide rods 7 are arranged on the core body 1 , and the ends of the guide rods 7 pass through the guide holes 8 .
[0031] Further, refer to Figure 4Arc-shaped guide grooves 9 are provided on both sides of the guide foot 5, and an arc-shaped guide flange 10 that matches the arc-shaped guide groove 9 is provided on the inner wall of the guide groove 4. When the guide foot 5 slides in the guide groove 4, the surface of the arc-shaped guide groove 9 and the arc-shaped guide flange 10 slide in cooperation with each other, thereby improving the sliding stability of the guide foot 5 in the guide groove 4 and preventing the guide foot 5 from shaking.
[0032] Furthermore, a fixing rod 20 is connected to the fixing block 3, and the end of the fixing rod 20 is connected to the fixed mold through a first buffer spring 21. The side of the fixing block 3 is connected to a second buffer spring 22, and the end of the second buffer spring 22 is connected to the fixed mold. The first buffer spring 21 mainly plays a buffering role for the longitudinal space of the fixing block 3, and the second buffer spring 22 mainly plays a buffering role for the lateral space of the fixing block 3.
[0033] In this embodiment, the core body 11 and the core connecting part 12 are integrally formed, and the extension direction of the guide groove 4 is consistent with the lifting direction of the core 1 in the mold cavity. When the core 1 moves in the mold cavity, the guide foot 5 can slide smoothly in the guide groove 4.
[0034] When the core pulling mechanism provided by the present application is in use, the driving member controls the core body 1 to extend into the mold cavity. During the movement of the core body 1, the guide rod 7 penetrated through the core body 1 guides the core body 1. At the same time, the guide foot 5 at the end of the supporting foot 2 on the side of the core body 1 is inserted into the guide groove 4 of the fixed block 3. The sliding cooperation between the guide groove 4 and the guide foot 5 also plays a role of stabilizing the guide of the moving core body 1, thereby ensuring the stability of the movement of the core body 1. The guide foot 5 on the side of the core body 1 has both a guiding role and a stabilizing support role. After the core body 1 enters the mold cavity, it is located At the end of the guide rod 7, the axial limit strength of the guide rod 7 on the core 1 is not high. When the molten material is injected into the mold cavity, the core 1 will be squeezed. At this time, the support foot 2 and the guide foot 5 on the side of the core 1 can apply axial support force to the core 1 with the help of the fixed block 3 to ensure the stability and placement strength of the core 1 in the mold cavity. Similarly, when the driving part controls the core 1 to be pulled out of the mold cavity, under the dual guiding action of the guide foot 5 and the guide rod 7, the core 1 will not shake when it withdraws from the mold cavity, avoiding the problem of irregular cavity on the injection molded part in the mold cavity.
[0035] In addition, an installation opening 13 is provided on the side of the core connecting part 12, and a height sensor 6 is provided in the installation opening 13. When the core 1 is extended into the mold cavity, the height sensor 6 can detect the height position of the core 1, and the problem of inaccurate arrival of the core in the mold cavity will not occur.
[0036] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.
Claims
1. A core pulling mechanism for a movable mold, comprising a core body arranged in a mold cavity, a support foot connected to the core body, and a fixed block arranged on one side of the support foot and connected to a fixed mold, characterized in that: The fixing block is provided with a guide groove, and the end of the supporting foot is provided with a guide foot corresponding to the guide groove, and the guide foot is suitable for being inserted into the guide groove; The core body comprises a core body main body part and a core body connecting part, the peripheral surface of the core body main body part is an arc surface, and the core body main body part is arranged in the mold cavity; A placement opening is provided on the side of the core body connection part, one end of the support foot away from the guide foot is fixedly connected to the inner wall of the placement opening, a height sensor is provided in the placement opening, and the core body is suitable for lifting and lowering in the mold cavity.
2. A mold core pulling mechanism according to claim 1, characterized in that: The fixed mold is arranged at the bottom of the mold cavity, a plurality of guide rods are arranged on the fixed mold, a plurality of guide holes corresponding to the guide rods are arranged on the core body, and the ends of the guide rods pass through the guide holes.
3. A mold core pulling mechanism according to claim 2, characterized in that: The fixed mold is provided with a driving member connected with the core body.
4. A mold core-pulling mechanism according to claim 2, characterized in that: Arc-shaped guide grooves are arranged on both sides of the guide foot, and arc-shaped guide flanges matching the arc-shaped guide grooves are arranged on the inner wall of the guide groove.
5. The mold movable mold core pulling mechanism according to claim 2, characterized in that: The fixing block is connected with a fixing rod, and the end of the fixing rod is connected to the fixed mold through a first buffer spring.
6. A mold core-pulling mechanism according to claim 2, characterized in that: The side surface of the fixing block is connected to the second buffer spring, and the end of the second buffer spring is connected to the fixed mold.
7. A mold core-pulling mechanism according to claim 2, characterized in that: The core body portion and the core connecting portion are integrally formed.
8. The mold movable mold core pulling mechanism according to claim 2, characterized in that: The extending direction of the guide groove is consistent with the lifting direction of the core body in the mold cavity.