Spliced ejector sleeve reinforcing mechanism
By connecting an extension rod to the ejector sleeve to achieve a T-type connection, the problems of easy damage and high replacement cost of the ejector sleeve are solved, thereby improving the service life of the ejector sleeve and production efficiency.
Patent Information
- Application Number
- CN202423054991.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-12-11
AI Technical Summary
Existing plastic molds often have sleeves that are easily damaged, and replacement costs are high. They are also inconvenient to disassemble and assemble, which affects production stability and efficiency.
The splice-type sleeve reinforcement mechanism is adopted. By connecting the sleeve extension rod to the sleeve, a T-type connection is achieved, which reduces the stress on the sleeve and allows for standardized interchangeability between the sleeve and the extension rod.
It increases the service life of the ejector sleeve, reduces replacement costs and disassembly difficulty, and improves production stability and product quality.
Smart Images
Figure CN223478249U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of automotive injection molds, specifically relating to a spliced sleeve reinforcement mechanism. Background Technology
[0002] For conventional ejector sleeve structures in plastic molds, the welded column depth is approximately 12mm. Due to limitations in mold gate design, an inverted mold design is required, resulting in an ejector sleeve length exceeding 730mm. If a double-section ejector sleeve is used directly in an inverted mold, the long sleeve, deep column, and numerous welded columns due to product structural features lead to significant clamping forces. During long-term mold production, the ejector sleeve is prone to damage due to stress, and the replacement cost and cycle time for double-section ejector sleeves are high. Therefore, during trial molding and production, a stable, easily disassembled, and interchangeable standard structure is needed to reduce the ejector sleeve length. Utility Model Content
[0003] To address the aforementioned problems in the existing technology, this utility model provides a spliced ejector sleeve reinforcement mechanism, which connects an extension rod to the ejector sleeve to reduce the susceptibility of the original double-section ejector sleeve, achieve standardization, and meet mold interchangeability requirements, thereby improving production stability and facilitating maintenance.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a spliced ejector sleeve reinforcement mechanism, comprising an ejector sleeve, an extended ejector sleeve rod, an ejector sleeve guide sleeve, an ejector sleeve needle, and an ejector sleeve pressure plate. The bottom end of the ejector sleeve is installed inside the extended ejector sleeve rod, the ejector sleeve guide sleeve is sleeved outside the extended ejector sleeve rod, the ejector sleeve needle passes through the middle of the ejector sleeve and the extended ejector sleeve rod and slides on the ejector sleeve needle, and the ejector sleeve pressure plate is fixed to the bottom of the ejector sleeve needle.
[0005] Furthermore, a protrusion is provided at the bottom of the sleeve, and a T-slot that matches the protrusion is provided inside the top of the sleeve extension rod.
[0006] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model adopts an extended sleeve rod. Since the sleeve and the extended sleeve rod are T-shaped connection structures, all the extended sleeve rods in a mold are of the same standard length and can be interchanged in a standardized manner. When the sleeve is damaged, there is no need to replace the whole sleeve; only the upper sleeve needs to be replaced, which saves replacement costs. Moreover, disassembly is convenient, saving replacement time. In addition, the extended sleeve rod has a diameter of 20mm, which improves the stress on the sleeve, increases the service life of the sleeve, ensures balanced ejection of the sleeve, stabilizes the structure, improves product quality, greatly reduces the risks in the production process, and reduces the cost of the mold. Attached Figure Description
[0007] Figure 1 This is a schematic diagram of the existing technology structure;
[0008] Figure 2 This is a schematic diagram of the structure of this utility model;
[0009] Figure 3 This is an exploded view of the present invention;
[0010] Figure 4 for Figure 2 Sectional view at point AA;
[0011] Figure 5 for Figure 4 Enlarged view at point B in the middle;
[0012] Figure 6 This is a schematic diagram of the existing technology and the working structure of this utility model. Detailed Implementation
[0013] 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.
[0014] Please see Figure 1 and 6 In the existing technology, when the product 1 has a large drop and the mold has an inverted structure with one or more welded pillars or screw pillars, a double-section ejector sleeve 7 is generally used. First, the double-section ejector sleeve 7 is installed into the needle plate 8 and the needle plate fixing plate 9 and fixed with screws. The ejector needle 5 is fixed on the base plate 10 and installed into the mold. At this time, the ejector needle 5 penetrates the double-section ejector sleeve 7 and is inserted into the product 1. When the mold is ejected, the ejector needle 5 remains fixed and gradually detaches from the product 1. The double-section ejector sleeve 7, together with the needle plate 8 and the needle plate fixing plate 9, ejects the product 1. Because the double-section ejector sleeve 7 is relatively long and the pillars of the product 1 are relatively deep, and it is constrained by the number of pillars of the product 1, the clamping force of the product 1 is relatively large. During long-term production of the mold, the double-section ejector sleeve 7 is easily damaged after being subjected to concentrated force multiple times. Moreover, after damage, the entire double-section ejector sleeve 7 needs to be replaced. On the one hand, the replacement cost is high, and on the other hand, disassembly and assembly are inconvenient and the replacement cycle is long.
[0015] Please see Figure 2-6 The present invention provides the following technical solution: a spliced ejector sleeve reinforcement mechanism, including an ejector sleeve 2, an ejector sleeve extension rod 3, an ejector sleeve guide sleeve 4, an ejector sleeve needle 5, and an ejector sleeve pressure plate 6. The bottom end of the ejector sleeve 2 is installed inside the ejector sleeve extension rod 3. The ejector sleeve guide sleeve 4 is sleeved on the outside of the ejector sleeve extension rod 3. The ejector sleeve guide sleeve 4 has the function of guiding and lubricating the ejector sleeve extension rod 3. The ejector sleeve needle 5 passes through the middle of the ejector sleeve 2 and the ejector sleeve extension rod 3, and the ejector sleeve 2 and the ejector sleeve extension rod 3 slide on the ejector sleeve needle 5. The ejector sleeve pressure plate 6 is fixed to the bottom of the ejector sleeve needle 5.
[0016] Specifically, the bottom end of the sleeve 2 is provided with a protrusion 21, and the top end of the sleeve extension rod 3 is provided with a T-slot 31 that matches the protrusion 21. The protrusion 21 on the sleeve 2 is installed in the T-slot 31 inside the sleeve extension rod 3, so that the sleeve 2 and the sleeve extension rod 3 are reliably connected.
[0017] The installation and movement process of this utility model is as follows: First, install the protrusion 21 at the bottom of the ejector sleeve 2 into the T-groove 31 inside the top of the ejector sleeve extension rod 3. Then, pass the ejector sleeve extension rod 3 through the ejector sleeve guide sleeve 4 fixed on the moving mold. Next, insert the bottom of the ejector sleeve extension rod 3 into the needle plate 8. At this time, the needle plate 8 and the needle plate fixing plate 9 are locked with screws and the top plate of the mold is covered and fixed to the mold with screws. Then, the ejector sleeve needle 5 is installed into the mold through the bottom plate 10. At this time, the ejector sleeve needle 5 passes through the middle of the ejector sleeve 2 and the ejector sleeve extension rod 3. Finally, the ejector sleeve pressure plate 6 fixes the ejector sleeve needle 5 from the bottom of the bottom plate 10 and the ejector sleeve pressure plate 6 is also locked and fixed with screws. This is how it is installed. At this time, the top of the ejector sleeve needle 5 is inserted into the welding column or screw column of the product 1, and the top of the ejector sleeve 2 is in contact with the surface of the product 1. During the ejection process, the ejector sleeve 2 and the ejector sleeve extension rod 3 push the product 1 together with the needle plate 8 and the needle plate fixing plate 9. At this time, the ejector needle 5 is fixed by the base plate 10 and does not move with it. The ejector sleeve 2 and the ejector sleeve extension rod 3 push the product 1 out and separate it from the top of the ejector needle 5. During the upward movement of the ejector sleeve 2 and the ejector sleeve extension rod 3, the ejector sleeve guide sleeve 4 is fixed by the passive mold. The ejector sleeve extension rod 3 moves in the ejector sleeve guide sleeve 4. The ejector sleeve guide sleeve 4 has the function of guiding and lubricating the ejector sleeve extension rod 3. Since the diameter of the ejector extension rod 3 is 20mm, which is larger than the existing double-section ejector 7 with a diameter of 12mm, and the ejector extension rod 3 and ejector 2 are connected by a T-type connection, the injection force of product 1 on ejector 2 can be reduced during ejection, thus improving the stress on ejector 2 and increasing its service life. At the same time, since the ejector extension rod 3 and ejector 2 are connected by a T-type connection, all ejector extension rods 3 in a mold are of the same standard length, which can achieve standardized interchangeability. When ejector 2 is damaged, only ejector 2 needs to be replaced, without replacing ejector extension rod 3, which reduces replacement costs and makes disassembly convenient, saving replacement cycles.
[0018] When the product 1 has a large drop and the mold is an inverted structure with one or more welded pillars or screw pillars, this utility model can solve the problems of concentrated force on the ejector sleeve 2 during ejection, which can easily cause damage, product positioning pillar eccentricity, and mouth damage, as well as avoid expensive costs such as mold modification in the later stage.
[0019] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A spliced sleeve reinforcement mechanism, characterized in that, The device includes a syringe (2), a syringe extension rod (3), a syringe guide sleeve (4), a syringe needle (5), and a syringe pressure plate (6). The bottom end of the syringe (2) is installed inside the syringe extension rod (3). The syringe guide sleeve (4) is sleeved on the outside of the syringe extension rod (3). The syringe needle (5) passes through the middle of the syringe (2) and the syringe extension rod (3), and the syringe (2) and the syringe extension rod (3) slide on the syringe needle (5). The syringe pressure plate (6) is fixed to the bottom of the syringe needle (5).
2. The spliced sleeve reinforcement mechanism according to claim 1, characterized in that, The bottom end of the sleeve (2) is provided with a protrusion (21), and the top end of the sleeve extension rod (3) is provided with a T-shaped groove (31) that matches the protrusion (21).