High-efficiency demolding device for antibacterial plastic bottle cap

Abstract

The utility model relates to the technical field of plastic product processing equipment, concretely to an antibacterial plastic bottle lid high -efficient stripping device, including mould body, the bottom of mould body is equipped with base, the inside lower extreme of mould body is equipped with stripping plate through movable slot, the inside middle part of base is equipped with the hydraulic cylinder that drives stripping plate lift activity, and the top of hydraulic cylinder is equipped with a plurality of sleeve that penetrates on stripping hole bottom wall, the top of sleeve is equipped with movable post, the top of movable post is connected with the jacking block that places in stripping hole inside, the top of sleeve, movable post and jacking block constitute a plurality of groups of elastic top rod subassembly in the top of stripping plate, and the top of jacking block is equipped with flexible cushion block, the outside along the mouth department of stripping hole on mould body is equipped with support guide ring.

Description

Technical Field

[0001] This utility model relates to the technical field of plastic product processing equipment, specifically to an efficient demolding device for antibacterial plastic bottle caps. Background Technology

[0002] With the widespread application of antibacterial materials, more and more plastic bottle caps are being injection molded using modified plastic raw materials with antibacterial properties to improve the hygiene and safety level of the products. In the injection molding process, demolding is one of the key steps, directly affecting whether the product can be removed from the mold intact and quickly, while avoiding surface damage or deformation.

[0003] Most existing plastic bottle cap demolding devices use a single mechanical ejector pin structure, relying on a fixed ejector pin to push the bottle cap out of the mold. Although this structure is simple and reliable, the small area of ​​the ejector pin can easily cause excessive local stress on the bottle cap, leading to problems such as jamming, deformation, or even breakage during demolding. Furthermore, the device lacks effective support for the inner edge of the bottle cap, which can easily cause stress concentration at the moment of ejection, resulting in cracking or burrs on the bottle cap edge, affecting the yield and appearance quality. Utility Model Content

[0004] The purpose of this invention is to provide an efficient demolding device for antibacterial plastic bottle caps, in order to solve the problems mentioned in the background art, such as the small effective area and localized stress concentration that lead to easy deformation or breakage of the bottle cap when the current demolding device adopts the ejector pin method, and the lack of effective support for the inner edge of the bottle cap, which easily causes stress concentration and cracking.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an efficient demolding device for antibacterial plastic bottle caps, comprising a mold body, a base at the bottom of the mold body, a demolding template provided inside the lower end of the mold body via a movable groove, a hydraulic cylinder for driving the demolding template to move up and down in the middle of the base, and multiple sleeves penetrating the bottom wall of the demolding hole at the top of the hydraulic cylinder, a movable column movably provided at the top of the sleeve, and a lifting block placed inside the demolding hole connected to the top of the movable column, the sleeve, movable column and lifting block forming several sets of elastic push rod assemblies at the top of the demolding template, and a flexible pad provided at the top of the lifting block, and a support guide ring provided at the outer edge of the demolding hole on the mold body.

[0006] Preferably, the lower end of the movable column extends into the interior of the sleeve, and the top end of the sleeve is provided with a limiting protrusion ring. A spring is connected between the top of the limiting protrusion ring and the bottom of the lifting block, and the spring is also sleeved on the outside of the upper end of the movable column.

[0007] Preferably, the flexible pad is made of rubber material and fits the top structure of the lifting block, and the flexible pad is fixed to the top of the lifting block by adhesive.

[0008] Preferably, the inner wall of the support guide ring is provided with an inclined guide surface, and the inclined guide surface on the inner wall of the support guide ring gradually inclines from the inside to the outside, with an angle of 5°-15°.

[0009] Preferably, a buffer pad is fitted inside the demolding template, and the output end of the hydraulic cylinder is connected to the demolding template through the buffer pad.

[0010] Preferably, the strip-shaped mold plate is strip-shaped, and both sides of the strip-shaped mold plate are slidably connected to the inner wall of the inner movable groove at the lower end of the mold body via sliders.

[0011] Compared with existing technologies, the beneficial effects of this utility model are as follows: This high-efficiency demolding device for antibacterial plastic bottle caps effectively disperses local stress during ejection, reducing the risk of bottle cap deformation and breakage. It also provides additional protection during the demolding process, thereby significantly improving demolding efficiency and product yield. The device utilizes an elastic ejector assembly composed of a sleeve, movable column, and spring to achieve adaptive adjustment and buffering during ejection. Combined with the uniform force distribution characteristics of the flexible pad, it further enhances demolding stability. Simultaneously, the support guide ring effectively guides and supports the bottle cap edges, preventing stress concentration during demolding. The overall structure works synergistically to ensure smooth and damage-free bottle cap demolding. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of an efficient demolding device for antibacterial plastic bottle caps according to the present invention; Figure 2 This is a top view of the mold body of the high-efficiency demolding device for antibacterial plastic bottle caps according to this utility model; Figure 3 This is a schematic diagram of the connection structure between the movable column and the sleeve of the high-efficiency demolding device for antibacterial plastic bottle caps according to this utility model.

[0013] In the diagram: 1. Mold body; 2. Base; 3. Demolding plate; 4. Hydraulic cylinder; 5. Buffer pad; 6. Sleeve; 7. Movable column; 8. Lifting block; 9. Flexible pad; 10. Limiting protrusion ring; 11. Spring component; 12. Support guide ring. Detailed Implementation

[0014] 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.

[0015] Please see Figure 1-3This utility model provides a technical solution: an efficient demolding device for antibacterial plastic bottle caps, including a mold body 1, a base 2 at the bottom of the mold body 1, a demolding plate 3 inside the lower end of the mold body 1 via a movable groove, a hydraulic cylinder 4 in the middle of the base 2 to drive the demolding plate 3 to move up and down, and a plurality of sleeves 6 penetrating the bottom wall of the demolding hole at the top of the hydraulic cylinder 4, rubber rings fixedly fitted at the penetration points of the sleeves 6 on the bottom wall of the demolding hole of the mold body 1, a movable column 7 movably provided at the top of the sleeves 6, a lifting block 8 placed inside the demolding hole connected to the top of the movable column 7, a sealing ring glued and fixed to the edge of the lifting block 8, the sealing ring adhering to the inner wall of the demolding hole on the mold body 1, the sleeves 6, the movable column 7 and the lifting block 8 at the top of the demolding plate 3 The mold body 1 consists of several sets of elastic ejector rod assemblies, and the top of the lifting block 8 is provided with a flexible pad 9. A support guide ring 12 is provided at the outer edge of the demolding hole on the mold body 1. This structure drives the demolding plate 3 to move upward through the hydraulic cylinder 4, which drives the sleeve 6 and the movable column 7 above it to rise synchronously. The upward-moving movable column 7 will drive the lifting block 8 to push the bottle cap out along the demolding hole direction. At this time, the flexible pad 9 first contacts the inner wall of the bottle cap and applies a uniform ejection force. Under the elastic action of the elastic ejector rod assembly, the movable column 7 can flexibly extend and retract within the sleeve 6 to adapt to the demolding requirements of bottle caps of different thicknesses. At the same time, the support guide ring 12 is set at the outer edge of the demolding hole. As the bottle cap gradually leaves the mold, its edge is effectively supported by the support guide ring 12, guiding the bottle cap to rise smoothly and preventing edge damage. The stress concentration caused by the suspended edge is mitigated by the overall device, which achieves uniform force distribution during ejection. This avoids the problem of excessive local stress caused by the small effective area of ​​traditional single ejector pin structures, thus solving defects such as jamming, deformation, breakage, edge cracking, and burrs that easily occur during the demolding process of bottle caps. This significantly improves demolding efficiency and product yield. The lower end of the movable column 7 extends into the interior of the sleeve 6, which is filled with elastic filler. The top of the sleeve 6 is provided with a limiting protrusion ring 10. A spring 11 is connected between the top of the limiting protrusion ring 10 and the bottom of the lifting block 8, and the spring 11 is also sleeved on the outside of the upper end of the movable column 7. When the lifting block 8 contacts the inner wall of the bottle cap, the flexible pad 9 begins to apply ejection force. If at this time, if... For bottle caps of varying thicknesses or uneven surfaces, the spring element 11, through its own compression and reset action, allows the movable column 7 to flexibly extend and retract within the sleeve 6. This ensures that the lifting block 8 always applies uniform pressure to the bottle cap surface. Simultaneously, the limiting ring 10 positions and supports the spring element 11, preventing it from shifting or falling off during operation. This ensures the stable and reliable operation of the elastic ejector assembly. This improves the demolding adaptability while effectively buffering the impact force during ejection, preventing bottle cap deformation or damage due to rigid contact. It significantly enhances the stability and yield of the demolding device. The flexible pad 9, made of rubber, fits the top structure of the lifting block 8 and is fixed to the top of the lifting block 8 by adhesive bonding.In this structure, when the lifting block 8 rises with the movable column 7 and contacts the inner wall of the bottle cap, the flexible pad 9 first contacts the bottle cap surface. Its rubber material has good elasticity and flexibility, effectively buffering the impact force during ejection. Simultaneously, its cooperation with the lifting block 8 ensures that the ejection force is evenly transmitted to the inner surface of the bottle cap, avoiding localized stress concentration caused by rigid contact, which could lead to bottle cap deformation or scratches. The inner wall of the support guide ring 12 has an inclined guide surface, which gradually slopes from the inside to the outside at an angle of 5°-15°. As the bottle cap moves upward with the lifting block 8 and gradually detaches from the mold, the support guide ring 12 forms a progressive contact with the outer edge of the bottle cap through this inclined guide surface. With the demolding action, the inclined guide surface guides the bottle cap edge to smoothly unfold outward and detach smoothly from the mold cavity, avoiding deformation or cracking caused by edge jamming or uneven force. This effectively enhances the support and guidance of the bottle cap edge during demolding, improving demolding stability and yield. A buffer pad 5 is fitted inside the demolding template 3, and the output end of the hydraulic cylinder 4 is connected to the demolding template 3 through the buffer pad 5. This structure effectively absorbs and buffers the impact force applied by the hydraulic cylinder 4 when the demolding template 3 is driven by the hydraulic cylinder 4 for lifting and lowering operations. This reduces the direct impact on the demolding template 3, protects the entire mechanical structure from severe vibration, and prevents wear or damage to device components caused by instantaneous high pressure. This ensures the stability and consistency of the bottle cap during the demolding process. The demolding template 3 has a strip-shaped structure, and both sides of the demolding template 3 are slidably connected to the inner wall of the internal movable groove at the lower end of the mold body 1 via sliders. During the up-and-down movement of the demolding template 3 driven by the hydraulic cylinder 4, this sliding connection structure provides stable guidance and support for the demolding template 3, ensuring it maintains a precise movement trajectory during lifting and lowering, avoiding deviation or jamming. Furthermore, the demolding template 3 is subjected to uniform force, enabling it to better support the synchronous operation of multiple elastic push rod assemblies.

[0016] Working principle: When using this high-efficiency demolding device for antibacterial plastic bottle caps, firstly, when several antibacterial plastic bottle caps inside the mold body 1 have finished injection molding and need to be demolded in the demolding hole, the hydraulic cylinder 4 is activated. Its output end pushes the demolding platen 3 upward along the movable groove inside the lower end of the mold body 1 through the buffer pad 5. The demolding platen 3 is stably raised and lowered by the sliders on both sides. As the demolding platen 3 rises, the multiple sleeves 6 fixed on its top move upward synchronously, driving the movable column 7 to rise together. When the movable column 7 drives the lifting block 8 to contact the inner wall of the bottle cap inside the mold cavity, the flexible pad 9 first contacts the bottle cap surface and opens. When the ejection force is applied, the movable column 7 moves inside the sleeve 6, compressing the spring 11. The limiting ring 10 supports and limits the spring 11. As the lifting block 8 continues to rise, the sealing ring moves with the lifting block 8 and stays in contact with the inner wall of the demolding hole on the mold body 1. At the same time, the edge of the bottle cap gradually separates from the mold cavity and contacts the support guide ring 12 at the outer edge of the demolding hole. The inclined guide surface of the support guide ring 12 gradually tilts from the inside to the outside, guiding the bottle cap to rise smoothly, and finally achieving complete separation of the bottle cap from the mold body 1, thus completing a series of operations.

[0017] Although the present invention 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 the present invention should be included within the protection scope of the present invention.

Claims

1. A high-efficiency demolding device for antibacterial plastic bottle caps, comprising a mold body (1), wherein a base (2) is provided at the bottom of the mold body (1), characterized in that: The mold body (1) has a release plate (3) inside the lower end through a movable groove. The base (2) has a hydraulic cylinder (4) in the middle to drive the release plate (3) to move up and down. The top of the hydraulic cylinder (4) has multiple sleeves (6) that pass through the bottom wall of the release hole. The top of the sleeve (6) has a movable column (7). The top of the movable column (7) is connected to a lifting block (8) placed inside the release hole. The sleeve (6), movable column (7) and lifting block (8) form several sets of elastic push rod assemblies on the top of the release plate (3). The top of the lifting block (8) has a flexible pad (9). The mold body (1) has a support guide ring (12) at the outer edge of the release hole.

2. The high-efficiency demolding device for antibacterial plastic bottle caps according to claim 1, characterized in that: The lower end of the movable column (7) extends into the interior of the sleeve (6), and the top end of the sleeve (6) is provided with a limiting protrusion ring (10). A spring member (11) is connected between the top of the limiting protrusion ring (10) and the bottom of the lifting block (8), and the spring member (11) is also sleeved on the outside of the upper end of the movable column (7).

3. The high-efficiency demolding device for antibacterial plastic bottle caps according to claim 1, characterized in that: The flexible pad (9) is made of rubber material and fits the top structure of the lifting block (8), and the flexible pad (9) is fixed to the top of the lifting block (8) by adhesive bonding.

4. The high-efficiency demolding device for antibacterial plastic bottle caps according to claim 1, characterized in that: The inner wall of the support guide ring (12) is provided with an inclined guide surface, and the inclined guide surface on the inner wall of the support guide ring (12) gradually tilts from the inside to the outside, with an angle of 5°-15°.

5. The high-efficiency demolding device for antibacterial plastic bottle caps according to claim 1, characterized in that: A buffer pad (5) is fitted inside the demolding template (3), and the output end of the hydraulic cylinder (4) is connected to the demolding template (3) through the buffer pad (5).

6. The high-efficiency demolding device for antibacterial plastic bottle caps according to claim 1, characterized in that: The stripping template (3) is a strip-shaped structure, and both sides of the stripping template (3) are connected to the inner wall of the inner movable groove at the lower end of the mold body (1) by a slider.

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