Active pitched roof inner core-pulling structure

Abstract

The utility model provides an active pitched roof inner core-pulling structure, which belongs to the technical field of injection molds, and comprises a push sleeve and a demolding assembly arranged outside the push sleeve, the demolding assembly comprises a main core, a pitched roof, a core seat, a cylinder, an upper push plate, a lower push plate, a B plate, a support plate, a main core positioning column, a reset step and a gas circuit, the main core is embedded in the push sleeve, and the reset step is embedded in the push sleeve. The push sleeve is embedded in the top opening of the outer wall of the upper push plate, and the pitched roof is sleeved on the outer wall of the top end of the main core. According to the demolding assembly, synchronous demolding is achieved, buckle position damage is avoided, the air cylinder pushes the lower push plate and the upper push plate to move synchronously, synchronous demolding is achieved through the pitched roof and the push sleeve, the active demolding mode avoids the risk that buckle positions are damaged due to the fact that the pitched roof does not move along with a product in traditional passive demolding, and the product yield is remarkably increased; and the push sleeve presses the reset step of the pitched roof when being ejected and returned, so that the pitched roof automatically resets, additional operation is not needed, the operation process of the mold is simplified, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of injection mold technology, specifically relating to an active inclined ejector core-pulling structure. Background Technology

[0002] Injection molds are key tools used in the production of plastic products and are widely used in industries such as automotive, electronics, home appliances, medical, and packaging. Their working principle is to inject molten plastic into the mold cavity, and after cooling and solidification, the plastic product of the required shape is formed. The design and manufacture of injection molds directly affect the quality of the product, production efficiency, and cost.

[0003] The inside of a liquor bottle cap typically has a three-section snap-fit ​​mechanism. To form this snap-fit, the mold will have three internal inclined ejectors for core pulling. The usual demolding method is that when the product is ejected, the product moves the inclined ejectors to disengage from the snap-fit, which is commonly known as the passive method. This method is simple in structure and low in cost, but there is a risk that the inclined ejectors may not move with the product and damage the snap-fit. This risk is even higher in mass production, and if it occurs, the entire batch will be scrapped. Utility Model Content

[0004] The purpose of this invention is to provide an active inclined top inner core pulling structure, which aims to solve the problems raised in the background art.

[0005] An active, angled-top, internal core-pulling structure includes:

[0006] Push the sleeve;

[0007] A demolding assembly is located outside the ejector sleeve, comprising: a main core, an inclined ejector, a core seat, a cylinder, an upper ejector plate, a lower ejector plate, a B-plate, a support plate, a main core positioning post, a reset step, and an air passage. The main core is embedded inside the ejector sleeve, the ejector sleeve is embedded at the top opening of the outer wall of the upper ejector plate, the inclined ejector is fitted at the top outer wall of the main core, the reset step is located at the bottom edge of the outer wall of the inclined ejector, the main core positioning post is located at the bottom of the outer wall of the main core, the core seat is fitted at the outer wall of the main core positioning post, the cylinder is embedded inside the B-plate, the air passage is located on the inner wall of the support plate, the cylinder and the air passage are interconnected, and the core seat is embedded at the opening of the lower ejector plate.

[0008] Furthermore, the inner wall of the main core is threaded with a first screw.

[0009] Furthermore, a second screw is threaded onto the inner wall of the core seat.

[0010] Furthermore, the upper push plate and the lower push plate are matched with each other.

[0011] Furthermore, the push plate is matched with plate B.

[0012] Furthermore, the B plate is matched with the support plate, and the cylinder is matched with the push plate.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] The demolding assembly enables synchronized demolding, preventing damage to the snap-fit ​​mechanism. A cylinder drives the lower and upper push plates to move synchronously, allowing the ejector pin and push sleeve to demold simultaneously. This active demolding method avoids the risk of the ejector pin damaging the snap-fit ​​mechanism due to not moving with the product, a risk common in traditional passive demolding. This significantly improves product yield. The main core is precisely positioned by the main core positioning post and core seat, and secured by the first and second screws, ensuring the stability of the main core and ejector pin within the mold and reducing product defects caused by positioning deviations. During ejection and return, the push sleeve presses against the reset step of the ejector pin, automatically resetting it without additional operation, simplifying the mold operation process and improving production efficiency. The cylinder is connected to a solenoid valve via an air circuit, ensuring stable and controllable power output, ensuring the smooth operation of the lower push... The synchronous movement precision of the platen and the upper push plate is suitable for mass production. The demolding components adopt a modular design, and each component, such as the main core, the angled ejector, and the core seat, can be disassembled and replaced individually, which facilitates maintenance and repair and reduces the maintenance cost of the mold. This structure effectively reduces the problem of batch scrap caused by the angled ejector pulling the snap-fit ​​position through optimized demolding method. It is particularly suitable for mass production scenarios that require high-precision molding, such as liquor bottle caps. Although it adds components such as cylinders and air circuits, the overall production cost is effectively controlled due to the significant reduction in product scrap rate, which has high economic benefits. The number and position of the angled ejectors can be adjusted according to the needs of different products, and it is suitable for a variety of products that require internal core pulling molding, with high versatility and compatibility. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0016] Figure 1 This is a cross-sectional view of the present invention;

[0017] Figure 2 This is an enlarged schematic diagram of A of this utility model;

[0018] Figure 3 This is a perspective view of the present invention.

[0019] In the diagram: 1. Push sleeve; 2. Main core; 3. Sloping top; 4. Core seat; 5. Cylinder; 6. Upper push plate; 7. Lower push plate; 8. B plate; 9. Support plate; 201. Main core positioning post; 202. First screw; 301. Reset step; 401. Second screw; 901. Air passage. Detailed Implementation

[0020] 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.

[0021] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] Please see Figure 1-3 The technical solution provided in this embodiment is as follows:

[0024] An active, angled-top, internal core-pulling structure includes:

[0025] Push sleeve 1;

[0026] The demolding assembly is located outside the push sleeve 1. The demolding assembly includes a main core 2, an inclined ejector 3, a core seat 4, a cylinder 5, an upper push plate 6, a lower push plate 7, a B plate 8, a support plate 9, a main core positioning post 201, a reset step 301, and an air passage 901. The main core 2 is embedded inside the push sleeve 1. The push sleeve 1 is embedded at the top opening of the outer wall of the upper push plate 6. The inclined ejector 3 is fitted at the top outer wall of the main core 2. The reset step 301 is opened at the bottom edge of the outer wall of the inclined ejector 3. The main core positioning post 201 is opened at the bottom of the outer wall of the main core 2. The core seat 4 is fitted at the outer wall of the main core positioning post 201. The cylinder 5 is embedded inside the B plate 8. The air passage 901 is opened at the inner wall of the support plate 9. The cylinder 5 and the air passage 901 are interconnected. The core seat 4 is embedded at the opening of the lower push plate 7.

[0027] In a specific embodiment of this utility model, the demolding assembly performs synchronous demolding to avoid damage to the snap-fit. The cylinder 5 pushes the lower push plate 7 and upper push plate 6 to move synchronously, enabling the inclined ejector 3 and push sleeve 1 to demold synchronously. This active demolding method avoids the risk of the inclined ejector 3 damaging the snap-fit ​​due to not moving with the product, as is common in traditional passive demolding, significantly improving product yield. The main core 2 is precisely positioned with the core seat 4 via the main core positioning post 201 and fixed by the first screw 202 and the second screw 401, ensuring the stability of the main core 2 and the inclined ejector 3 in the mold and reducing product defects caused by positioning deviations. When the push sleeve 1 ejects and returns to its original position, it presses against the reset step 301 of the inclined ejector 3, causing the inclined ejector 3 to automatically reset without additional operation, simplifying the mold operation process and improving production efficiency. The cylinder 5 is connected to the solenoid valve via the air passage 901. The power output is stable and controllable, ensuring the synchronous movement accuracy of the lower push plate 7 and the upper push plate 6, making it suitable for mass production. The demolding assembly adopts a modular design, and each component, such as the main core 2, the inclined ejector 3, and the core seat 4, can be disassembled and replaced individually, facilitating maintenance and repair and reducing mold maintenance costs. This structure effectively reduces the problem of batch scrap caused by the inclined ejector 3 pulling the snap-fit ​​position through optimized demolding method, making it particularly suitable for mass production scenarios that require high-precision molding, such as liquor bottle caps. Although components such as cylinder 5 and air circuit 901 are added, the overall production cost is effectively controlled due to the significant reduction in product scrap rate, resulting in high economic benefits. The number and position of the inclined ejector 3 can be adjusted according to the needs of different products, making it suitable for a variety of products that require internal core pulling molding, and it has high versatility and compatibility.

[0028] Specifically, the inner wall of the main core 2 is threaded with a first screw 202.

[0029] In a specific embodiment of this utility model, the stable installation of the main core 2 can be guaranteed.

[0030] Specifically, the inner wall of the core base 4 is threaded with a second screw 401.

[0031] In a specific embodiment of this utility model, the stable installation of the core base 4 can be guaranteed.

[0032] Specifically, the upper push plate 6 and the lower push plate 7 are matched with each other.

[0033] In a specific embodiment of this utility model, the upper push plate 6 and the lower push plate 7 are matched to avoid interference.

[0034] Specifically, the push plate 7 and the B plate 8 are matched with each other.

[0035] In a specific embodiment of this utility model, the push plate 7 and the B plate 8 are matched to ensure the stability of movement.

[0036] Specifically, plate B8 is matched with support plate 9, and cylinder 5 is matched with push plate 7.

[0037] In a specific embodiment of this utility model, the cylinder 5 and the lower push plate 7 are matched to ensure high precision in driving the lifting.

[0038] Working principle:

[0039] The upper push plate 6 pushes the push sleeve 1. During ejection and demolding, the upper push plate 6 moves forward, pushing the push sleeve 1 forward and beginning to push the product out of the mold. The cylinder 5 drives the lower push plate 7. At the same time, the solenoid valve opens, the air passage 901 is vented, and the cylinder 5 is pushed forward. The cylinder 5 pushes the lower push plate 7 and the upper push plate 6 to move forward synchronously. The inclined ejector 3 demolds synchronously. The inclined ejector 3 is fixed on the upper surface of the lower push plate 7. As the lower push plate 7 moves forward, the inclined ejector 3 is pushed forward and disengages from the product's locking position synchronously with the push sleeve 1. This synchronous movement avoids the risk of the inclined ejector 3 damaging the locking position due to not moving with the product. The product is completely demolded. The push sleeve 1 and the inclined ejector 3 continue to move forward until the product is completely out of the mold, completing the demolding process. The push sleeve 1 presses the inclined ejector 3 to reset. During ejection and return, the push sleeve 1 begins to move backward, pressing the reset step 301 of the inclined ejector 3, causing the inclined ejector 3 to gradually reset and return to its initial position. Under the action of the push sleeve 1, it returns completely to the initial position, ready for the next molding. The upper push plate 6 and the lower push plate 7 reset. Driven by the cylinder 5, the upper push plate 6 and the lower push plate 7 return to the initial position synchronously, completing the entire return process. The main core 2 is precisely positioned. The main core 2 is assembled in the positioning hole of the core seat 4 through the main core positioning post 201 to ensure its precise positioning in the mold. The main core 2 is fixed to the core seat 4. The main core 2 is fixed to the core seat 4 by the first screw 202. The core seat 4 is fixed to the lower push plate 7 by the second screw 401 to ensure the stability of the main core 2 and the inclined ejector 3 in the mold. The cylinder 5 drives the lower push plate 7. The cylinder 5 is connected to the solenoid valve through the air passage 901. When the solenoid valve is open, air is supplied, pushing the cylinder 5 to move forward, thereby pushing the lower push plate 7 and the upper push plate 6 to move synchronously. The cylinder 5 resets. In the return stage, the cylinder 5 pushes the lower push plate 7 back to the initial position through the reverse air passage 901.

[0040] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is 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 positive slope ejector core structure, characterized in that, The utility model relates to a push-in sleeve (1); The demoulding assembly is arranged at the outside of the push-in sleeve (1), wherein: the demoulding assembly comprises a main core (2), an inclined top (3), a core seat (4), a cylinder (5), an upper push plate (6), a lower push plate (7), a B plate (8), a supporting plate (9), a main core positioning column (201), a reset step (301) and a gas circuit (901), the main core (2) is embedded at the inside of the push-in sleeve (1), the push-in sleeve (1) is embedded at the opening at the top of the outer wall of the upper push plate (6), the inclined top (3) is sleeved at the top outer wall of the main core (2), the reset step (301) is arranged at the bottom edge of the outer wall of the inclined top (3), the main core positioning column (201) is arranged at the bottom of the outer wall of the main core (2), the core seat (4) is sleeved at the outer wall of the main core positioning column (201), the cylinder (5) is embedded at the inside of the B plate (8), the gas circuit (901) is arranged at the inner wall of the supporting plate (9), the cylinder (5) and the gas circuit (901) are communicated, and the core seat (4) is embedded at the opening of the lower push plate (7). The inner wall of the main core (2) is screw connected with a first screw (202).

2. The active inclined ejector inner core pulling structure according to claim 1, wherein, The inner wall of the core seat (4) is screw connected with a second screw (401).

3. The active inclined ejector inner core pulling structure according to claim 2, wherein, The upper push plate (6) and the lower push plate (7) are matched with each other.

4. The active inclined ejector inner core pulling structure according to claim 3, wherein, The lower push plate (7) and the B plate (8) are matched with each other.

5. The active inclined ejector inner core pulling structure according to claim 4, wherein, The B plate (8) and the supporting plate (9) are matched with each other, and the cylinder (5) and the lower push plate (7) are matched with each other.

6. The active inclined ejector inner core pulling structure according to claim 5, wherein, ​

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