Injection molding part demolding device
The demolding device, which combines a negative pressure chamber and a high pressure chamber, solves the problem of damage to large thin-walled injection molded parts during demolding by suction cups, and achieves a safe and reliable demolding effect.
Patent Information
- Application Number
- CN202520416247.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-11
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2035-03-11
AI Technical Summary
In existing technologies, suction cup devices are prone to damaging or failing to effectively adhere to large, thin-walled injection molded parts during the demolding process, leading to demolding difficulties.
The demolding device uses a combination of negative pressure chamber and high pressure chamber. It forms a suction cup by drawing a vacuum to adsorb the injection molded part, and uses a high pressure support rod to support the injection molded part, so as to avoid deformation caused by excessive suction and enhance the adsorption firmness and safety.
It enables reliable demolding of large, thin-walled injection molded parts, avoids deformation and damage caused by excessive suction, and improves the safety and adhesion of the equipment.
Smart Images
Figure CN223790950U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of injection molding technology, and in particular to a demolding device for injection molded parts. Background Technology
[0002] In existing technologies, after injection molded parts are formed in a mold, they need to be removed from the mold. However, for large products, demolding requires the use of equipment such as suction cups. Negative pressure is used to adhere the product to the suction cup, and then moving the suction cup removes the product. However, for some thin-walled products, strong suction can easily damage the product, while weak suction may fail to hold the product, leading to demolding difficulties. Utility Model Content
[0003] To address the aforementioned technical deficiencies, this invention provides a demolding device for injection molded parts, suitable for demolding large, thin-walled injection molded parts, which can prevent damage to the injection molded parts caused by excessive suction.
[0004] This utility model discloses a demolding device for injection molded parts, including a power drive mechanism. A demolding box is installed on the power drive mechanism. The demolding box is a hollow, closed box. A partition is installed inside the demolding box, which divides the hollow structure inside the demolding box into two independent cavities, one of which is a negative pressure cavity and the other is a high pressure cavity. An annular sealing cover extends outward from the outer periphery of the side wall of the negative pressure cavity away from the high pressure cavity. A through hole is provided on the side wall of the negative pressure cavity within the range of the annular sealing cover, and the through hole extends into the interior of the negative pressure cavity. A plurality of support rods are arranged in an array within the range of the annular sealing cover. The support rods pass through the side wall of the negative pressure cavity and the partition within the range of the annular sealing cover and extend into the high pressure cavity. The support rods are sealed and slidingly connected to the side wall of the negative pressure cavity and the partition. A vacuum tube is installed on the side wall of the negative pressure cavity outside the annular sealing cover, and a high pressure air tube is installed on the side wall of the high pressure cavity.
[0005] The annular sealing cover is made of rubber.
[0006] A conical block is provided at both ends of the support rod. The smaller end of the conical block is fixedly connected to the end of the support rod. The conical block within the annular sealing cover is made of rubber, while the conical block within the high-pressure chamber is made of metal.
[0007] The power drive mechanism includes a transverse slide rail, on which a sliding block is slidably connected. A horizontal lead screw is mounted on the transverse slide rail, parallel to the transverse slide rail and rotatably connected at both ends. A first motor is fixedly mounted at one end of the transverse slide rail and is connected to the horizontal lead screw via a transmission connection. A screw hole is provided on the sliding block, and the lead screw is fitted into the screw hole. A vertical slide rail is slidably mounted on the sliding block. The demolding box is fixed to the lower end of the vertical slide rail. A rack is mounted on the side wall of the vertical slide rail. A second motor is mounted on the sliding block, and a drive gear is mounted on the output shaft of the second motor, which is fitted into the rack.
[0008] The injection molding demolding device of this utility model, after the annular sealing cover is attached to the injection molding part, the vacuum tube draws the negative pressure chamber to a negative pressure, thereby forming a suction cup to adsorb the injection molding part onto the annular sealing cover. At the same time, the high-pressure air pipe inflates the high-pressure chamber to a certain pressure, and under the action of air pressure, the support rod is pushed out to press against the injection molding part, thereby providing uniform support for the injection molding part and avoiding deformation and damage to the middle part of the injection molding part due to excessive suction, thus improving the safety of equipment use. At the same time, it can also appropriately increase the negative pressure degree of adsorption on the injection molding part to improve the adsorption firmness and demolding reliability. Attached Figure Description
[0009] Figure 1 This is a front view of the structure of this utility model;
[0010] Figure 2 This is a side view of the structure of this utility model;
[0011] Figure 3 for Figure 2 Schematic diagram of AA section;
[0012] Figure 4 This is a three-dimensional structural view of the present invention. Detailed Implementation
[0013] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.
[0014] Example 1:
[0015] like Figures 1-4As shown, this utility model discloses a demolding device for injection molded parts, including a power drive mechanism. A demolding box 1 is provided on the power drive mechanism. The demolding box 1 is a hollow, closed box. A partition 3 is provided inside the demolding box 1, which divides the hollow structure inside the demolding box 1 into two independent cavities, one of which is a negative pressure cavity 7 and the other is a high pressure cavity 8. An annular sealing cover 2 extends outward from the outer periphery of the side wall of the negative pressure cavity 7, which is away from the high pressure cavity 8. A through hole 4 is provided on the side wall of the negative pressure chamber 7 within the range of 2. The through hole 4 extends into the interior of the negative pressure chamber 7. Several support rods 5 are arranged in an array within the range of the annular sealing cover 2. The support rods 5 extend through the side wall of the negative pressure chamber 7 and the partition plate 3 within the range of the annular sealing cover 2 and into the high pressure chamber 8. The support rods 5 are sealed and slidingly connected to the side wall of the negative pressure chamber 7 and the partition plate 3. A vacuum tube 17 is provided on the side wall of the negative pressure chamber 7 outside the annular sealing cover 2. A high pressure air tube 18 is provided on the side wall of the high pressure chamber 8.
[0016] The demolding box 1 is divided into two independent cavities by a partition 3: a negative pressure cavity 7 and a high pressure cavity 8. During operation, the power drive mechanism moves the demolding box 1 to the side of the injection molded part, causing the annular sealing cover 2 to align with it. The annular sealing cover 2 and the interior of the injection molded part form a sealed cavity. When the vacuum tube 17 draws the negative pressure cavity 7 to its rated negative pressure, the space between the annular sealing cover 2 and the injection molded part is also drawn to negative pressure, forming a suction cup that adheres the injection molded part to the annular sealing cover 2, since the space between the negative pressure cavity 7 and the interior of the annular sealing cover 2 is connected by a through hole 4. This creates a suction cup that adheres the injection molded part to the annular sealing cover 2. This application primarily targets relatively large, thin-walled injection molded parts. Therefore, the coverage area of the annular sealing cover 2 is relatively large, meaning the area between the annular sealing covers 2 is also large. For larger injection molded parts, a greater suction force is required to hold and demold them. However, a large suction force can easily cause excessive stress and damage to the middle part of the injection molded part. Support rods 5 are arranged within the annular sealing cover 2, and these support rods 5 penetrate the entire negative pressure chamber 7 and extend into the high pressure chamber 8. Therefore, while negative pressure is generated in the negative pressure chamber 7, high pressure is generated in the high pressure chamber 8. This high pressure pushes the support rods 5 closer to the injection molded part, and the ends of the support rods 5 provide support to the injection molded part, preventing deformation and breakage under negative pressure. This improves safety during the injection molded part's adsorption process and facilitates demolding. Of course, the negative pressure and high pressure need to be kept in relative balance; the high pressure should not be too high, pushing the injection molded part outwards, nor too low, failing to provide support.
[0017] The annular sealing cover 2 is made of rubber. The rubber material of the annular sealing cover 2 provides a better seal between it and the injection-molded part.
[0018] A conical block 6 is provided at both ends of the support rod 5. The smaller end of the conical block 6 is fixedly connected to the end of the support rod 5. The conical block 6 within the annular sealing cover 2 is made of rubber, while the conical block 6 within the high-pressure chamber 8 is made of metal. The conical block 6 at the end of the support rod 5 increases the force-bearing area, especially the conical block 6 at the end of the support rod 5 near the annular sealing cover 2, which is made of rubber and has a larger area supporting the injection molded part. Therefore, it can increase the force-bearing area when supporting the injection molded part, protecting the safety of the injection molded part. The conical block 6 at the end of the support rod 5 within the high-pressure chamber 8 increases the force-bearing area for air pressure.
[0019] The power drive mechanism includes a transverse slide rail 9, on which a sliding block 10 is provided, slidably connected to the transverse slide rail 9. A horizontal lead screw 11 is provided on the transverse slide rail 9, parallel to the transverse slide rail 9 and rotatably connected to both ends of the transverse slide rail 9. A first motor 12 is fixedly provided at one end of the transverse slide rail 9, and the first motor 12 is connected to the horizontal lead screw 11. A screw hole is provided on the sliding block 10, and the lead screw 11 is engaged with the screw hole. A vertical slide rail 13 is slidably provided on the sliding block 10. The demolding box 1 is fixed to the lower end of the vertical slide rail 13. A rack 14 is provided on the side wall of the vertical slide rail 13. A second motor 15 is provided on the sliding block 10. A drive gear 16 is provided on the output shaft of the second motor 15, and the drive gear 16 is engaged with the rack 14.
[0020] In practical use, the horizontal slide rail 9 can be fixed to the frame, and the sliding block 10 can move on the horizontal slide rail 9 under the action of the first motor 12 and the lead screw 11. The vertical slide rail 13 is slidably connected to the sliding block 10. The rotation of the drive gear 16 on the output shaft of the second motor 15 can drive the rack 14 and the vertical slide rail 13 to rise and fall, thereby realizing the adjustment of the horizontal and vertical positions of the demolding box 1. The sliding block 10 can be provided with a dovetail-shaped protrusion, and the vertical slide rail 13 is provided with a dovetail-shaped groove. The two are slidably connected, which is firm and stable. An inner groove can be provided on the horizontal slide rail 9, and the lead screw 11 is set in the inner groove. A part of the sliding block 10 extends into the inner groove and is provided with a screw hole to cooperate with the lead screw 11. This driving form is stable and reliable, runs smoothly, and has high efficiency.
[0021] The vacuum tube 17 can be connected to a vacuum pump, which is a commercially available product and is not limited thereto. The high-pressure air tube 18 can be connected to a high-pressure air pump, which is a commercially available product and is not limited thereto. In addition, the support rod 5 and the partition plate 3 and the side wall of the demolding box 1 are connected by a sealed sliding connection. The sealing structure is a known existing structure, such as a packing seal, and is not limited thereto.
[0022] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application 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 application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0023] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the interaction relationship between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0024] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0025] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simplification, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.
Claims
1. An ejection apparatus for injection molded parts, comprising a power drive mechanism, characterized in that: A demolding box is arranged on the power driving mechanism, the demolding box is a closed box with an internal cavity, a partition plate is arranged in the demolding box, the internal cavity of the demolding box is divided into two independent cavities by the partition plate, one of the two cavities is a negative pressure cavity, and the other is a high pressure cavity, an annular sealing cover extends outward from the peripheral wall of the side wall of the negative pressure cavity away from the high pressure cavity, a through hole is arranged on the side wall of the negative pressure cavity in the range of the annular sealing cover, the through hole penetrates to the inside of the negative pressure cavity, a plurality of support rods are arranged in an array in the range of the annular sealing cover, the support rods penetrate the side wall of the negative pressure cavity and the partition plate in the range of the annular sealing cover and extend into the high pressure cavity, the support rods and the side wall of the negative pressure cavity and the partition plate are in sealed sliding connection, a vacuum pipe is arranged on the side wall of the negative pressure cavity outside the annular sealing cover, and a high pressure gas pipe is arranged on the side wall of the high pressure cavity.
2. A device for ejecting an injection molded part according to claim 1, characterized in that: The annular sealing cover is made of rubber.
3. The ejection apparatus of claim 1 wherein said means for moving said ejector pin comprises a hydraulic cylinder. Both ends of the support rod are provided with tapered blocks, the smaller end of the tapered block is fixedly connected with the end of the support rod, the tapered block in the range of the annular sealing cover is made of rubber, and the tapered block in the high pressure cavity is made of metal.
4. A device for ejecting an injection molded part according to claim 1 or 2 or 3, characterized in that: The power driving mechanism comprises a transverse sliding rail, a sliding block is arranged on the transverse sliding rail and in sliding connection with the transverse sliding rail, a horizontal screw rod is arranged on the transverse sliding rail, the horizontal screw rod is parallel to the transverse sliding rail and both ends of the horizontal screw rod are rotationally connected to both ends of the transverse sliding rail, a first motor is fixedly arranged at one end of the transverse sliding rail, the first motor is in transmission connection with the horizontal screw rod, a screw hole is arranged on the sliding block and in matched connection with the horizontal screw rod, a vertical sliding rail is slidably arranged on the sliding block, the demolding box is fixed to the lower end of the vertical sliding rail, a rack is arranged on the side wall of the vertical sliding rail, a second motor is arranged on the sliding block, a driving gear is arranged on the output shaft of the second motor and in matched connection with the rack.