Ejection structure mold frame for preventing product from being damaged

Abstract

This utility model relates to the field of mold manufacturing and discloses an ejection structure mold frame to prevent product tearing. This utility model, by setting a sequential mold opening mechanism, precisely controls the mold opening sequence. First, the mold opening between the sprue ejector plate and plate A is completed, achieving early separation of the sprue from the product. Then, the mold opening between plate A and plate B is performed, effectively avoiding tearing problems caused by improper force during mold opening and significantly improving product quality. The sequential mold opening mechanism has a reasonable structural design. Through the cooperation of fixed blocks, connecting rods, limiting parts, and springs, it achieves automatic control of the mold opening sequence without the need for additional power drive, ensuring stable and reliable operation. The design that the stroke of the first connecting rod slide is greater than the length of the second connecting rod slot, and the limitation of the sprue ejector plate mold opening distance by the sliding sleeve, further ensures the orderliness and accuracy of the mold opening process, avoiding over-molding or disordered sequence.

Description

Technical Field

[0001] This utility model relates to the field of mold manufacturing, specifically an ejection structure mold frame to prevent product tearing. Background Technology

[0002] In existing mold structures, there are typically two plates: a fixed plate and a moving plate, as well as a sprue ejector plate. During mold opening, it's common for both the AB plate and the sprue ejector plate to open simultaneously. However, this simultaneous opening method has significant drawbacks: because the product is connected to the sprue, during simultaneous opening, the product experiences tensile forces from multiple directions from the AB plate and the sprue ejector plate, and these forces are difficult to maintain in a balanced manner. This can easily lead to excessive stress on the connection between the product and the sprue, or uneven stretching of the product within the mold, resulting in defects such as scratches and deformation on the product surface. This severely affects product quality, reduces the production yield, and increases production costs and rework rates.

[0003] Therefore, an ejection structure mold frame to prevent product tearing is proposed to address the above problems. Utility Model Content

[0004] This invention overcomes the defect in the prior art where the simultaneous opening of the AB plate and the sprue ejector plate causes the product to be easily damaged by tearing. It provides an ejection structure mold frame that prevents product tearing by controlling the mold opening sequence, opening the sprue ejector plate first, and then opening the AB plate, thereby avoiding product tearing and improving product quality.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an ejection structure mold frame for preventing product tearing, comprising a fixed mold base plate, a sprue ejector plate, an A plate, a B plate, a moving mold pad, and an ejection mechanism. The fixed mold base plate is located at the top, the sprue ejector plate is located below the fixed mold base plate, the A plate is located below the sprue ejector plate, the B plate is located below the A plate, and the moving mold pad is located below the B plate. The fixed mold base plate, the sprue ejector plate, the A plate, the B plate, and the moving mold pad are guided and positioned by guide pillars and can slide relative to each other along the guide pillars. It also includes a sequential mold opening mechanism, which enables the mold opening process to first open the mold between the sprue ejector plate and the A plate, and then open the mold between the A plate and the B plate.

[0006] Preferably, the sequential mold opening mechanism includes a fixed block, a first connecting rod, a fixed plate, a second connecting rod, a limiting part, and a spring. The fixed block is bolted to one side surface of the sprue push plate, and the fixed plate is mounted on the side surface of the fixed mold base plate. The two ends of the first connecting rod are connected to the fixed mold base plate and plate A through mounting parts, and the first connecting rod passes through the fixed block. The two ends of the second connecting rod are connected to the fixed mold base plate and plate B respectively through connecting parts, and the second connecting rod is disposed between the first connecting rod and the fixed plate. The limiting part is installed inside the fixed block, and two protrusions on the limiting part are respectively located between the fixed plate, the second connecting rod, and the first connecting rod. The spring is disposed inside the fixed block, with one end connected to the limiting part and the other end connected to the fixed block. The surface of the second connecting rod has a groove that matches the protrusions on the limiting part, and the surface of the first connecting rod has a sliding groove.

[0007] Preferably, the travel of the groove on the surface of the first connecting rod is greater than the length of the slot on the surface of the second connecting rod.

[0008] Preferably, the limiting part consists of two parts: a base and two trapezoidal protrusions.

[0009] Preferably, the fixing block has a guide groove inside that matches the limiting part, and the base of the limiting part slides in the guide groove.

[0010] Preferably, the other end of the fixing plate is inserted into the fixing block to limit the limiting part.

[0011] Preferably, the guide post is provided with a sliding sleeve, which is located inside the sprue ejector plate and is used to limit the mold opening distance of the sprue ejector plate.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention employs a sequential mold-opening mechanism to precisely control the mold-opening sequence. It first completes the mold opening between the sprue ejector plate and plate A, achieving early separation of the sprue from the product, and then proceeds with the mold opening between plate A and plate B. This effectively avoids product damage caused by improper force during mold opening, significantly improving product quality. The sequential mold-opening mechanism features a rational structural design. Through the cooperation of fixed blocks, connecting rods, limiting parts, and springs, it achieves automatic control of the mold-opening sequence without requiring additional power, ensuring stable and reliable operation. The design of the first connecting rod's slide groove stroke being greater than the second connecting rod's slot length, along with the sliding sleeve's limitation on the sprue ejector plate's mold-opening distance, further ensures the orderliness and accuracy of the mold-opening process, preventing over-opening or sequence errors. All components are detachably connected via bolts and mounting parts, facilitating installation, debugging, and maintenance, reducing production and usage costs. The limiting part adopts a base with a trapezoidal protrusion structure, combined with the limiting effect of the fixed plate, making the limiting effect more stable and ensuring the reliability of the sequential mold-opening mechanism during long-term use. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 In this utility model Figure 1 Enlarged view of the structure at point A; Figure 3 This is a diagram showing the positions and installation of the sliding sleeve and guide post in this utility model; Figure 4 This is a structural installation diagram of the sequential mold opening mechanism in this utility model; Figure 5 In this utility model Figure 4 Enlarged view of the structure at point B.

[0014] In the diagram: 1. Fixed mold base plate; 2. Sprue ejector plate; 3. Plate A; 4. Plate B; 5. Moving mold pad; 6. Guide pillar; 9. Fixing block; 10. First connecting rod; 11. Fixing plate; 12. Second connecting rod; 13. Limiting part; 14. Spring; 15. Sliding sleeve; 16. Slot; 17. Slide groove. Detailed Implementation

[0015] 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, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] like Figures 1 to 5As shown, this utility model provides an ejection structure mold frame to prevent product tearing, including a fixed mold base plate 1, a sprue ejector plate 2, an A plate 3, a B plate 4, a moving mold pad plate 5, an ejection mechanism, and a sequential mold opening mechanism. The fixed mold base plate 1, the sprue ejector plate 2, the A plate 3, the B plate 4, and the moving mold pad plate 5 are arranged sequentially from top to bottom and are guided and positioned by guide posts 6, allowing them to slide relative to each other along the guide posts 6.

[0017] The sequential mold opening mechanism is the core component for realizing sequential mold opening. Its specific composition and connection relationship are as follows: The fixing block 9 is firmly installed on one side surface of the sprue push plate 2 by bolts. The fixing plate 11 is installed on the side surface of the fixed mold base plate 1, and the other end of the fixing plate 11 is inserted into the fixing block 9 to limit the limiting part 13. The two ends of the first connecting rod 10 are connected to the fixed mold base plate 1 and the A plate 3 respectively by mounting parts, and the first connecting rod 10 passes through the fixing block 9, and its surface is provided with a sliding groove 17. The two ends of the second connecting rod 12 are connected to the fixed mold base plate 1 and the B plate 4 respectively through connecting parts. It is set between the first connecting rod 10 and the fixed plate 11. Its surface is provided with a slot 16 that matches the protrusion on the limiting part 13. By setting a sequential mold opening mechanism, the mold opening sequence is precisely controlled. The mold opening between the sprue push plate 2 and the A plate 3 is completed first, realizing the early separation of the sprue from the product. Then the mold opening between the A plate 3 and the B plate 4 is carried out. This effectively avoids the problem of product tearing caused by improper force during the mold opening process, and significantly improves product quality. The sequential mold opening mechanism has a reasonable structural design. Through the cooperation of the fixed block 9, the first connecting rod 10, the second connecting rod 12, the limiting part 13 and the spring 14, the automatic control of the mold opening sequence is realized. No additional power drive is required, and the operation is stable and reliable.

[0018] The limiting part 13 is installed inside the fixing block 9 and consists of a base and two trapezoidal protrusions. The base slides within a matching guide groove inside the fixing block 9, and the two protrusions are located between the fixing plate 11, the second connecting rod 12, and the first connecting rod 10, respectively. A spring 14 is located inside the fixing block 9, with one end connected to the limiting part 13 and the other end connected to the fixing block 9, providing elastic restoring force for the limiting part 13. A sliding sleeve 15 is provided on the guide post 6, located inside the sprue ejector plate 2, to limit the mold opening distance of the sprue ejector plate 2.

[0019] Working principle and process: In the initial stage of mold opening, the mold is subjected to mold opening force. At this time, in the sequential mold opening mechanism, the spring 14 is in a compressed state, the protrusion of the limiting part 13 is engaged in the slot 16 of the second connecting rod 12, and under the limiting action of the fixed plate 11, the sprue ejector plate 2 and the A plate 3 remain in a closed state, while the fixed mold base plate 1 and the sprue ejector plate 2, and the A plate 3 and the B plate 4 begin to have a relative movement tendency. As the mold opening force increases, since the first connecting rod 10 is connected to the fixed mold base plate 1 and the A plate 3, the sliding groove 17 on its surface provides space for the sliding of the fixed block 9. Under the force transmission, the elastic force of the spring 14 is overcome first, causing the protrusion of the limiting part 13 to disengage from the slot 16 of the second connecting rod 12. At this time, the sprue ejector plate 2 and the A plate 3 begin to slide relative to each other, and the mold opens. Under the action of the sliding sleeve 15, the mold opening distance of the sprue ejector plate 2 is limited within a reasonable range, completing the separation of the sprue from the product.

[0020] After the sprue ejector plate 2 and plate A 3 are in place, the travel of the slide groove 17 of the first connecting rod 10 ends, and the fixing block 9 no longer slides relative to the first connecting rod 10. At this time, the mold opening force continues to act, causing plate A 3 and plate B 4 to begin sliding relative to each other, thus opening the mold. Since the sprue has separated at this time, the product is successfully demolded under the action of the ejection mechanism, avoiding damage. During the mold closing process, each component is reset under the guidance of the guide pillar 6, and the limiting part 13 is re-engaged into the slot 16 of the second connecting rod 12 under the action of the spring 14, preparing for the next mold opening.

[0021] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An ejection structure mold frame for preventing product tearing, comprising a fixed mold base plate (1), a sprue push plate (2), an A plate (3), a B plate (4), a moving mold pad (5), and an ejection mechanism, wherein the fixed mold base plate (1) is located at the top, the sprue push plate (2) is located below the fixed mold base plate (1), the A plate (3) is located below the sprue push plate (2), the B plate (4) is located below the A plate (3), and the moving mold pad (5) is located below the B plate (4). The fixed mold base plate (1), the sprue push plate (2), the A plate (3), the B plate (4), and the moving mold pad (5) are guided and positioned by guide posts (6) and can slide relative to each other along the guide posts (6), characterized in that: It also includes a sequential mold opening mechanism, which enables the mold opening process to first open the mold between the sprue push plate (2) and plate A (3), and then open the mold between plate A (3) and plate B (4).

2. The ejection structure mold frame for preventing product tearing according to claim 1, characterized in that: The sequential mold opening mechanism includes a fixed block (9), a first connecting rod (10), a fixed plate (11), a second connecting rod (12), a limiting part (13), and a spring (14). The fixed block (9) is bolted to one side surface of the sprue push plate (2), and the fixed plate (11) is mounted on the side surface of the fixed mold base plate (1). The two ends of the first connecting rod (10) are connected to the fixed mold base plate (1) and plate A (3) through mounting parts. The first connecting rod (10) passes through the fixed block (9). The two ends of the second connecting rod (12) are connected to the fixed mold base plate (1) and plate B (4) respectively through connecting parts. The limiting part (13) is installed inside the fixing block (9) between the first connecting rod (10) and the fixing plate (11). The two protrusions on the limiting part (13) are respectively located between the fixing plate (11), the second connecting rod (12) and the first connecting rod (10). The spring (14) is installed inside the fixing block (9). One end of the spring (14) is connected to the limiting part (13) and the other end of the spring (14) is connected to the fixing block (9). The surface of the second connecting rod (12) is provided with a slot (16) that matches the protrusion on the limiting part (13). The surface of the first connecting rod (10) is provided with a sliding groove (17).

3. The ejection structure mold frame for preventing product tearing according to claim 2, characterized in that: The travel of the groove (17) on the surface of the first connecting rod (10) is greater than the length of the slot (16) on the surface of the second connecting rod (12).

4. The ejection structure mold frame for preventing product tearing according to claim 2, characterized in that: The limiting part (13) consists of a base and two trapezoidal protrusions.

5. The ejection structure mold frame for preventing product tearing according to claim 4, characterized in that: The fixing block (9) has a guide groove inside that is adapted to the limiting part (13), and the base of the limiting part (13) slides in the guide groove.

6. The ejection structure mold frame for preventing product tearing according to claim 2, characterized in that: The other end of the fixing plate (11) is inserted into the fixing block (9) to limit the limiting part (13).

7. The ejection structure mold frame for preventing product tearing according to claim 1, characterized in that: The guide post (6) is provided with a sliding sleeve (15), which is located inside the sprue push plate (2) and is used to limit the mold opening distance of the sprue push plate (2).

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