Large-size cylindrical composite material workpiece demolding supporting device

Abstract

The utility model provides a large-size cylindrical composite material workpiece demolding supporting device. The large-size cylindrical composite material workpiece demolding supporting device comprises a plurality of supporting units. The supporting unit comprises a fixing base, and an ejection block is installed on the fixing base through a tightness adjusting assembly. The tightness adjusting assembly comprises a limiting rod, an elastic piece is installed on the limiting rod, a limiting base is arranged in the ejection block, the limiting rod is fixed to the limiting base, and the limiting rod is connected with the ejection block through an ejection block fixing piece on the fixing base. And when the connection between the ejector block fixing piece and the ejector block is released, the elastic piece pushes the ejector block to one side far away from the center of the mold, so that the polytetrafluoroethylene sliding plate on the outer side of the ejector block is in contact with the inner wall of the workpiece, and the polytetrafluoroethylene sliding plate is in sliding fit with the inner wall of the workpiece in the demolding process. The multiple sets of supporting units are installed on the mold, the mold is dragged into a product through the steel wire rope, the metal mold does not make contact with the inner surface of the workpiece in the demolding process, the polytetrafluoroethylene sliding plate makes contact with the workpiece, and damage to the product is reduced.

Description

Technical Field

[0001] This invention belongs to the technical field of composite material parts production equipment, and in particular relates to a demolding support device for large-size cylindrical composite material workpieces. Background Technology

[0002] Fiber-reinforced composite materials combine advantages such as lightweight, high temperature resistance, sound absorption, moisture resistance, fire resistance, corrosion resistance, and high strength, and are increasingly being used in aerospace and military fields. In actual production, during demolding of large-sized cylindrical composite workpieces, scratches frequently occur between the workpiece and the mold, damaging the product and even affecting its quality, ultimately rendering it unusable and scrapped. Current technology, to avoid losses caused by the workpiece's end sinking, typically involves axially elevating the product during demolding and then using a crane for vertical demolding. However, this operation is limited by space constraints, and many factory facilities cannot meet the requirements for vertical demolding. Therefore, it is necessary to design a device that can assist in horizontal demolding to protect the product from damage. Summary of the Invention

[0003] In view of this, the present invention aims to overcome the defects in the prior art and proposes a demolding support device for large-sized cylindrical composite material workpieces.

[0004] To achieve the above objectives, the technical solution created by this invention is implemented as follows:

[0005] A demolding support device for a large cylindrical composite material workpiece includes several support units arranged at intervals along the circumferential direction on the end face of the mold; each support unit includes a fixed seat, an ejector block is installed on the fixed seat through a tension adjustment component, and an ejector block fixing component is provided between the fixed seat and the ejector block, and a polytetrafluoroethylene sliding plate is installed on the outside of the ejector block.

[0006] The tension adjustment assembly includes a limiting rod with an elastic element installed on it. The ejector block has a limiting seat that floats radially along the mold. The limiting rod extends into the ejector block and is fixed to the limiting seat by the limiting element. The ejector block is connected to the ejector block by the ejector block fixing element on the fixing seat, so as to realize the ejector block storage, that is, to shrink the ejector block within the area covered by the mold, or in other words, the ejector block does not protrude from the outer surface of the mold radially.

[0007] When the connection between the ejector block fixing component and the ejector block is released, the elastic component pushes the ejector block away from the center of the mold, so that the PTFE sliding plate on the outside of the ejector block contacts the inner wall of the workpiece. During the demolding process, the elastic component always holds the ejector block to maintain the sliding fit between the PTFE sliding plate and the inner wall of the workpiece.

[0008] Furthermore, the elastic element includes a spring, which is fitted onto the limiting rod, with one end of the elastic element abutting against the fixed seat and the other end abutting against the ejector block.

[0009] Furthermore, the PTFE slide plate is installed on the ejector block by slide plate connecting screws. The PTFE slide plate has mounting holes, and the outer edge of the slide plate connecting screws is inside the surface of the PTFE slide plate.

[0010] Furthermore, the polytetrafluoroethylene sliding plate has an arc-shaped plate structure.

[0011] Furthermore, a push-out block fixing component is provided on each side of the limiting rod, and these two push-out block fixing components are symmetrically arranged on both sides of the limiting rod.

[0012] Furthermore, the ejector block fixing member adopts a fully threaded screw, the thread of which is screwed into the fixing seat, and a threaded connection hole matching the thread structure of the ejector block fixing member is provided on the end face of the ejector block facing the fixing seat.

[0013] Furthermore, the limiting component includes a limiting pin, and the limiting seat is rotatably mounted on the end of the limiting rod via the limiting pin. The space inside the ejector block for installing the limiting seat has a floating gap along the radial direction of the mold, which not only achieves connection but also ensures that the ejector block has a certain floating ability, good follow-up performance, and minimizes surface damage to the product.

[0014] Furthermore, the fixing seat can be detachably installed on the mold using fixing screws.

[0015] Compared with existing technologies, the present invention has the following advantages:

[0016] This invention utilizes multiple support units installed on a mold. During demolding, the ejector block is released by loosening the ejector block fixing component. As the mold is dragged into the product by a steel wire rope, the PTFE sliding plate on the outside of the ejector block contacts the inner wall of the workpiece. Throughout the demolding process, an elastic element holds the ejector block in place to maintain a sliding fit between the PTFE sliding plate and the inner wall of the workpiece. During demolding, the metal mold does not contact the inner surface of the workpiece; instead, the PTFE sliding plate contacts the workpiece, reducing damage to the product. Attached Figure Description

[0017] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0018] Figure 1 A schematic diagram of the structure created by this invention;

[0019] Figure 2 This is a schematic diagram illustrating the invention when installed in a mold;

[0020] Figure 3 This is a schematic diagram illustrating the application state of the present invention. Detailed Implementation

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0022] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing this invention 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 on this invention. Furthermore, the terms "first," "second," etc., 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, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] The invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] A demolding support device for large-sized cylindrical composite material workpieces, such as Figures 1 to 3 As shown, the mold includes several support units 02 arranged at intervals along the circumferential direction on the end face of the mold 01. Each support unit includes a fixed base 1, on which an ejector block 3 is mounted via a tension adjustment assembly 2. An ejector block fixing member 4 is provided between the fixed base and the ejector block, and a polytetrafluoroethylene sliding plate 5 is mounted on the outside of the ejector block. The tension adjustment assembly includes a limiting rod 6, on which an elastic element is mounted. For example, the elastic element includes a spring 7, which is fitted onto the limiting rod, with one end of the elastic element abutting against the fixed base and the other end abutting against the ejector block. The fixed base is detachably mounted to the mold via fixing screws.

[0026] The ejector block is equipped with a limiting seat 8 that floats radially along the mold. The limiting rod extends into the ejector block and is fixed to the limiting seat by the limiting component. The ejector block is connected to the ejector block by the ejector block fixing component on the fixing seat, keeping the ejector block in the retracted state, that is, retracting the ejector block within the area covered by the mold (the ejector block does not protrude from the outer surface of the mold radially).

[0027] When the connection between the ejector block fixing component and the ejector block is released, the elastic element pushes the ejector block away from the mold center, causing the PTFE sliding plate on the outer side of the ejector block to contact the inner wall of the workpiece. Throughout the demolding process, the elastic element holds the ejector block in place to maintain a sliding fit between the PTFE sliding plate and the inner wall of the workpiece. The PTFE sliding plate is mounted to the ejector block via sliding plate connecting screws 10. The PTFE sliding plate has mounting holes with smoothed edges, and the outer edge of the sliding plate connecting screws is within the surface of the PTFE sliding plate. Typically, the aforementioned PTFE sliding plate has an arc-shaped structure to accommodate the shape of the workpiece.

[0028] A push-out block fixing component is provided on each side of the limiting rod, and the two push-out block fixing components are symmetrically arranged on both sides of the limiting rod. As an example, the push-out block fixing component is a fully threaded screw, the thread of which is screwed into the fixing seat, and a threaded connection hole matching the thread structure of the push-out block fixing component is provided on the end face of the push-out block facing the fixing seat.

[0029] The aforementioned limiting components include a limiting pin 9. A limiting seat is rotatably mounted to the end of the limiting rod via the limiting pin. The space inside the ejector block for installing the limiting seat has a floating clearance along the radial direction of the mold. The limiting pin connects the limiting rod and the limiting seat. The limiting pin not only serves as a connector but also ensures that the limiting seat rotates around the limiting pin, giving the ejector block a certain "oscillating" ability and good follow-up. Therefore, relative to the inner surface of the cylindrical workpiece, the ejector block can float radially along the workpiece and oscillate appropriately around the workpiece center, exhibiting strong self-adaptability and minimizing damage to the product surface during demolding. During demolding, the tightness of the tension adjustment component is adjusted to ensure appropriate support force from the PTFE sliding plate on the inner surface of the product. Then, a steel wire rope is used to pull the mold to complete demolding. It should be noted that since the ejector block has a floating installation structure, there is no need to precisely adjust the tension adjustment components. It is sufficient to roughly adjust the ejector block to the appropriate position. During the demolding process, the ejector block can adaptively adjust its position and posture, resulting in excellent performance and reliability, which greatly avoids damage to the product from the mold.

[0030] When applying, such as Figure 3As shown, first use the ejector block fixing part on the fixed base to connect with the ejector block, and always keep the ejector block in the storage state; after the product is cured, place the product to be demolded on the demolding support frame 04, and pull the mold with the steel wire rope of the demolding equipment to make the support unit part on the mold enter the inside of the product.

[0031] Then, screw on the ejector block fixing part to detach it from the ejector block, allowing the ejector block to be released. Under the elastic force of the elastic element, the PTFE sliding plate on the outside of the ejector block is ensured to contact the inner wall of the product and form effective support. Then, the sliding plate connecting screws can be adjusted appropriately to make the supporting force of the PTFE sliding plate on the product surface moderate.

[0032] The mold is pulled further by the steel wire rope of the demolding device 03 until all the support units on the mold are inside the product. After confirming that the ejector block has no abnormal posture and that the PTFE sliding plate is stably bonded to the product surface, the mold is pulled at a constant speed to complete the demolding.

[0033] This invention utilizes multiple support units installed on a mold. During demolding, the ejector block is released by loosening the ejector block fixing component. As the mold is dragged into the product by a steel wire rope, the PTFE sliding plate on the outside of the ejector block contacts the inner wall of the workpiece. Throughout the demolding process, an elastic element holds the ejector block in place to maintain a sliding fit between the PTFE sliding plate and the inner wall of the workpiece. During demolding, the metal mold does not contact the inner surface of the workpiece; instead, the PTFE sliding plate contacts the workpiece, reducing damage to the product.

[0034] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. 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 demolding support device for large-sized cylindrical composite material workpieces, characterized in that: It includes several support units arranged at intervals along the circumferential direction on the mold end face; The support unit includes a fixed base, on which an ejector block is mounted via a tension adjustment assembly, and an ejector block fixing component is provided between the fixed base and the ejector block. A polytetrafluoroethylene sliding plate is mounted on the outside of the ejector block. The tension adjustment assembly includes a limiting rod with an elastic element installed on it. The ejector block is provided with a limiting seat that floats radially along the mold. The limiting rod extends into the ejector block and is fixed to the limiting seat by the limiting element. The ejector block is connected to the ejector block by the ejector block fixing element on the fixing seat to realize the ejector block storage. When the connection between the ejector block fixing component and the ejector block is released, the elastic component pushes the ejector block away from the center of the mold, so that the PTFE sliding plate on the outside of the ejector block contacts the inner wall of the workpiece. During the demolding process, the elastic component always holds the ejector block to maintain the sliding fit between the PTFE sliding plate and the inner wall of the workpiece.

2. The demolding support device for a large-size cylindrical composite material workpiece according to claim 1, characterized in that: The elastic element includes a spring, which is fitted onto the limiting rod. One end of the elastic element abuts against the fixed seat, and the other end abuts against the ejector block.

3. The demolding support device for a large-size cylindrical composite material workpiece according to claim 1, characterized in that: The PTFE slide plate is installed on the ejector block by slide plate connecting screws. The PTFE slide plate has mounting holes, and the outer edge of the slide plate connecting screws is inside the surface of the PTFE slide plate.

4. The demolding support device for a large-size cylindrical composite material workpiece according to claim 1, characterized in that: The polytetrafluoroethylene sliding plate has an arc-shaped plate structure.

5. The demolding support device for a large-size cylindrical composite material workpiece according to claim 1, characterized in that: A push-out block fixing component is provided on each side of the limiting rod, and the two push-out block fixing components are symmetrically arranged on both sides of the limiting rod.

6. A demolding support device for a large-size cylindrical composite material workpiece according to claim 1 or 5, characterized in that: The ejector block fixing component uses a fully threaded screw, the thread of which is screwed into the fixing seat, and a threaded connection hole matching the thread structure of the ejector block fixing component is provided on the end face of the ejector block facing the fixing seat.

7. The demolding support device for a large-size cylindrical composite material workpiece according to claim 1, characterized in that: The mounting base can be detachably installed on the mold using fixing screws.

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