A self-erecting compensation type rotational molding thin cover product shaping device

Abstract

The utility model discloses a self -vertical compensation formula rotation -moulding thin type cover class product setting device, and product includes the cover body with the open mouth of bottom, the setting device includes the bottom support and the week side setting mechanism, the bottom support has for holding the upper end of cover body, the bottom support upper end outer surface profile with cover body inboard wall profile matching arrangement is set, and the inboard of cover body is with the clearance fit or transition fit of bottom support upper end, distinguish from prior art, the bottom support in the application can support the inboard of cover body and be shaped, so that the cover body does not appear the phenomenon of recess when cooling, simultaneously, when using, a plurality of week side positioning member and top positioning member mainly play the role of the pressure to the outer surface of cover body, and effectively avoid the distortion phenomenon of cover body because of the uneven cooling under the cooperation of each other.

Description

Technical Field

[0001] This utility model relates to the field of rotational molding product manufacturing technology, specifically to a self-draping compensation type rotational molding thin cover product shaping device. Background Technology

[0002] Rotational molding is a process particularly suitable for producing hollow, large, or structurally complex products. The basic process involves adding plastic powder into a mold, which is heated and rotated along two axes, causing the plastic to melt and adhere evenly to the inner wall of the mold cavity. After cooling and solidification, the product is demolded. The advantages of this process include seamless, one-piece molding, good edge strength, and relatively low mold costs.

[0003] However, for products like single-layer thin casings, rotational molding also has the following limitations: During the molding process, uneven cooling can generate uneven internal stress within the product. When the product is removed from the mold, this internal stress is released, causing warping, bending, and other deformations, especially at the top of the product, where the structure is often relatively simple and has less support, making it prone to deformation under its own weight and internal stress.

[0004] Therefore, how to overcome the shortcomings of the existing technology mentioned above has become the subject of this utility model. Utility Model Content

[0005] The purpose of this invention is to provide a self-draping compensation type rotational molding thin cover product shaping device.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A self-draping, rotomolded thin cover product shaping device is disclosed. The product includes a cover body with an open bottom. The shaping device includes a base support and a peripheral shaping mechanism. The base support has an upper end for supporting the cover body. The outer contour of the upper end of the base support matches the contour of the inner wall of the cover body. The inner wall of the cover body and the upper end of the base support have a clearance fit or a transition fit. The peripheral shaping mechanism covers the outside of the base support. Through the cooperation between the base support and the peripheral shaping mechanism, the cover body is positioned between the base support and the peripheral shaping mechanism. The peripheral shaping mechanism includes multiple peripheral positioning members and a top positioning member. Each peripheral positioning member corresponds to each surface of the cover body's periphery and is configured to apply pressure to the corresponding surface of the cover body's periphery. The top positioning member is located directly above the cover body and has a pressure surface. The top positioning member is configured to use gravity to apply pressure evenly to all parts of the top outer surface of the cover body.

[0007] In the above solution, pressure can be applied to the periphery and top of the cover by the cooperation of multiple peripheral positioning parts and top positioning parts to prevent the cover from deforming. Specifically, the cover is first placed on the upper end of the base support. After the upper end of the base support is fully attached to the inner wall of the cover, the peripheral shaping mechanism is then placed on the outer side of the base support. At this time, all peripheral positioning parts will be aligned with the corresponding outer peripheral surface of the cover and apply pressure. At the same time, the top positioning part will also be aligned with the outer surface of the top of the cover, and gravity will be used to apply pressure evenly to all parts of the outer surface of the top of the cover.

[0008] In the above solution, unlike the prior art, the bottom support in this application can support and shape the inner side of the cover so that the cover will not sink when it cools. At the same time, during use, multiple peripheral positioning parts and top positioning parts mainly play the role of applying pressure to the outer surface of the cover. With their cooperation, they can effectively prevent the cover from twisting due to uneven cooling, so as to ensure the dimensional accuracy and appearance quality after molding.

[0009] In a further technical solution, the peripheral shaping mechanism also includes a fixing frame, which is mounted on the outside of the base; all peripheral positioning components and the top positioning components are positioned and connected to the fixing frame.

[0010] With the above design, the mounting bracket can move together with the peripheral positioning component and the top positioning component. That is, when disassembling and installing, simply lift or lower the mounting bracket to align or detach the peripheral positioning component and the top positioning component from the periphery and top of the cover, respectively.

[0011] A further technical solution is that the peripheral positioning component includes a peripheral pressure plate and a reciprocating drive that is positioned and connected to the fixed frame. The movable end of the reciprocating drive is positioned and connected to the peripheral pressure plate. The peripheral pressure plate is directly opposite any peripheral outer surface of the cover. The length and width of the peripheral pressure plate are both less than or equal to the length and width of the peripheral outer surface of the cover.

[0012] With the above design, the reciprocating drive can drive the peripheral pressure plate to reciprocate radially, thereby completing the operation of applying pressure or detaching from the outer surface of the cover.

[0013] The radial direction is described with reference to the center of the cover, which is positioned between the base and the peripheral shaping mechanism.

[0014] In a further technical solution, the reciprocating actuator is a cylinder, and at least one reciprocating actuator is provided on each of the peripheral pressure plates. This design allows multiple reciprocating actuators to operate simultaneously.

[0015] A further technical solution is that the top positioning component includes a gravity pressure plate and a fixing plate fixedly mounted on the fixing frame and located directly above the upper end of the bottom support, with multiple sliding columns passing through the fixing plate; The lower end of the sliding column is directly opposite the upper end of the base, and the lower ends of all the sliding columns are positioned and connected to the upper surface of the gravity pressure plate. The upper end of the sliding column serves as the load-bearing end (it should be noted that the upper end faces of multiple sliding columns will be combined to form a load-bearing end face). The lower surface of the gravity plate serves as the pressure application surface; When the cover is positioned between the base and the peripheral shaping mechanism, the lower surface of the gravity plate abuts against the outer surface of the top of the cover.

[0016] With the above design, different amounts of gravity can be applied to the top of the enclosure.

[0017] A further technical solution is to provide an anti-detachment plate on the upper end face of the sliding column to restrict the axial sliding of the sliding column from detaching from the fixing plate.

[0018] With the above design, when the top positioning component detaches from the cover, the detachment action of the top positioning component can be achieved simply by moving the fixing bracket.

[0019] A further technical solution is that the base includes a bracket with an open bottom surface, and the inner side wall of the bracket has multiple elongated holes; The outer side wall and top edge of the bracket are recessed to form a step around the bracket.

[0020] The above design allows the gas inside the cover to escape through the elongated holes during the shrinking process, preventing the cover from bulging due to untimely gas expulsion.

[0021] The steps are mainly designed to support the cover, preventing it from sagging when it contracts or is under pressure. Meanwhile, the recessed sections on the outer side walls and top edge of the bracket match the contour of the inner side wall of the cover (i.e., the contour of the upper outer surface of the base).

[0022] A further technical solution is that the outer edge of the open end of the cover is provided with a flange that surrounds the periphery of the cover.

[0023] With the above design, the flange can abut against and be restrained by the step, thereby ensuring the stability of the cover's position during assembly and preventing displacement or slippage due to uneven force. At the same time, the presence of the flange enhances the structural strength of the cover's edges, which helps maintain the integrity of its shape during compression molding.

[0024] The terms "first," "second," etc., used in this article do not specifically refer to order or sequence, nor are they intended to limit this case; they are merely used to distinguish components or operations described using the same technical terms.

[0025] The terms "connection" or "positioning" as used in this article can refer to two or more components or devices making direct physical contact with each other, or making indirect physical contact with each other, or to two or more components or devices operating or moving with each other.

[0026] The terms “include,” “including,” and “have” used in this article are all open-ended, meaning they include but are not limited to.

[0027] Unless otherwise specified, the terms used herein generally have their ordinary meaning in the context of the art, the subject matter, and the specific context. Certain terms used to describe this case will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing this case.

[0028] The terms “front,” “back,” “up,” “down,” “left,” and “right” used in this article are directional terms. In this case, they are only used to describe the positional relationship between the structures and are not intended to limit the specific direction of the protection scheme or its actual implementation.

[0029] The working principle and advantages of this utility model are as follows: This utility model uses the cooperation of multiple peripheral positioning parts and top positioning parts to apply pressure to the periphery and top of the cover to prevent deformation of the cover. Specifically, the cover is first placed on the upper end of the base. After the upper end of the base is fully attached to the inner wall of the cover, a peripheral shaping mechanism is then placed on the outer side of the base. At this time, all peripheral positioning parts will be aligned with the outer peripheral surface of the corresponding side of the cover and apply radial pressure. At the same time, the top positioning part will also be aligned with the outer surface of the top of the cover, and gravity will be used to apply pressure evenly to all parts of the outer surface of the top of the cover.

[0030] Unlike existing technologies, the base support in this application can support and shape the inner side of the cover, preventing the cover from denting during cooling. Simultaneously, during use, multiple peripheral and top positioning components primarily apply pressure to the outer surface of the cover, effectively preventing distortion caused by uneven cooling and ensuring dimensional accuracy and appearance quality after molding. Attached Figure Description

[0031] Appendix Figure 1 This is a schematic diagram of the overall structure in an embodiment of the present utility model; Appendix Figure 2 This is a schematic diagram of the top positioning component structure in an embodiment of the present utility model; Appendix Figure 3 This is a schematic diagram of the overall longitudinal section structure in an embodiment of this utility model; Appendix Figure 4 This is a schematic diagram of the peripheral positioning component structure in an embodiment of the present utility model; Appendix Figure 5 This is a schematic diagram of the base structure in an embodiment of the present utility model.

[0032] In the above attached diagrams: 1. Cover; 2. Base support; 3. Peripheral shaping mechanism; 4. Peripheral positioning component; 5. Top positioning component; 6. Pressure surface; 7. Fixing frame; 8. Reciprocating drive; 9. Peripheral pressure plate; 10. Fixing plate; 11. Sliding column; 12. Anti-detachment plate; 13. Bracket; 14. Long slot; 15. Step; 16. Flanged edge; 17. Gravity pressure plate. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings and embodiments: Example: The present invention will be clearly described below with illustrations and detailed description. Any person skilled in the art who understands the examples of the present invention can make changes and modifications based on the technology taught in the present invention without departing from the spirit and scope of the present invention.

[0034] The terminology used herein is for the purpose of describing specific embodiments only and is not intended to limit the scope of this work. Singular forms such as “a,” “this,” “this,” “the,” and “the” as used herein also include plural forms.

[0035] See appendix Figure 1 - Figure 5 As shown, a self-draping compensation type rotational molding thin cover product shaping device is disclosed. The product includes a cover 1 with an open bottom. The shaping device includes a base 2 and a peripheral shaping mechanism 3. The base 2 has an upper end for supporting the cover 1. The outer contour of the upper end of the base 2 matches the inner sidewall contour of the cover 1. The inner side of the cover 1 and the upper end of the base 2 are in clearance fit or transition fit. The peripheral shaping mechanism 3 covers the outside of the base 2. Through the cooperation between the base 2 and the peripheral shaping mechanism 3, the product is shaped to achieve the desired shape. The cover 1 is positioned between the base 2 and the peripheral shaping mechanism 3; the peripheral shaping mechanism 3 includes a plurality of peripheral positioning members 4 and a top positioning member 5, each peripheral positioning member 4 is provided in a one-to-one correspondence with each surface of the periphery of the cover 1, and the peripheral positioning member 4 is configured to apply pressure to the corresponding surface of the periphery of the cover 1; the top positioning member 5 is located directly above the cover 1, and the top positioning member 5 has a pressure surface 6, and the top positioning member 5 is configured to use gravity to make the pressure surface 6 apply pressure evenly to all parts of the top outer surface of the cover 1.

[0036] In this application, the inner side of the cover 1 and the upper end of the base 2 are generally selected to be in clearance fit to facilitate the assembly of the cover 1 and the upper end of the base 2.

[0037] It should be noted that after the cover 1 and the upper part of the base 2 are assembled, the base 2, the cover 1, and the peripheral shaping mechanism 3 are installed sequentially from the inside to the outside.

[0038] In this application, the length and width of the pressure surface 6 are greater than or equal to the length and width of the upper end of the base 2. The purpose is that by cooperating with the upper end face of the base 2, each area of ​​the top of the cover 1 can be clamped, thereby reducing the probability of deformation.

[0039] This utility model can apply pressure to the periphery and top of the cover 1 through the cooperation of multiple peripheral positioning parts 4 and top positioning parts 5 to prevent the cover 1 from deforming. Specifically, the cover 1 is first placed on the upper end of the base 2. After the upper end of the base 2 is fully attached to the inner wall of the cover 1, the peripheral shaping mechanism 3 is then placed on the outside of the base 2. At this time, all the peripheral positioning parts 4 will be aligned with the outer peripheral surface of the corresponding side on the periphery of the cover 1 and apply radial pressure. At the same time, the top positioning parts 5 will also be aligned with the outer surface of the top of the cover 1, and gravity will be used to make the pressure surface 6 apply pressure evenly to all parts of the outer surface of the top of the cover 1.

[0040] Unlike existing technologies, the base support 2 in this application can support and shape the inner side of the cover 1 so that the cover 1 will not dent during cooling. At the same time, during use, multiple peripheral positioning parts 4 and top positioning parts 5 mainly apply pressure to the outer surface of the cover 1. With their cooperation, they effectively prevent the cover 1 from twisting due to uneven cooling, so as to ensure the dimensional accuracy and appearance quality after molding.

[0041] Preferably, the peripheral shaping mechanism 3 further includes a fixing frame 7, which is covered on the outside of the base 2; all the peripheral positioning members 4 and the top positioning members 5 are positioned and connected to the fixing frame 7.

[0042] With the above design, the fixing frame 7 can move together with the peripheral positioning component 4 and the top positioning component 5. That is, when disassembling and installing, simply lift or lower the fixing frame 7 to make the peripheral positioning component 4 and the top positioning component 5 align with or detach from the periphery and top of the cover 1, respectively.

[0043] Preferably, the peripheral positioning component 4 includes a peripheral pressure plate 9 and a reciprocating driver 8 positioned and connected to the fixed frame 7. The movable end of the reciprocating driver 8 is positioned and connected to the peripheral pressure plate 9. The peripheral pressure plate 9 is directly opposite any peripheral outer surface of the cover 1. The length and width of the peripheral pressure plate 9 are both less than or equal to the length and width of the peripheral outer surface of the cover 1.

[0044] Typically, the length and width of each peripheral pressure plate 9 are slightly smaller than the length and width of the corresponding side surface on the outer periphery of the cover 1, but are usually greater than or equal to the length and width of the corresponding side surface at the upper end of the base 2. This design does not affect the pressing action of adjacent peripheral pressure plates 9, and can effectively apply pressure to the corresponding side surface of the cover 1.

[0045] For example, the length and width of the peripheral pressure plate 9 corresponding to the outer peripheral surface in the length direction of the cover 1 should be slightly smaller than the length and width of the outer peripheral surface in the length direction of the cover 1, so as to avoid blocking the peripheral pressure plates 9 corresponding to the two outer peripheral surfaces in the width direction of the cover 1, while ensuring that it does not interfere with the pressure surface 6. For details of the specific structure, see Figure 1 and Figure 2 .

[0046] With the above design, the reciprocating drive 8 can drive the peripheral pressure plate 9 to reciprocate radially, thereby completing the operation of applying pressure or detaching from the outer surface of the cover 1.

[0047] Specifically, when pressure is required, the moving end of the reciprocating driver 8 is directly driven to work, so that it carries the peripheral pressure plate 9 to press against the outer surface of the corresponding side of the outer periphery of the cover 1, thus completing the pressure application operation.

[0048] Once the moving end of the reciprocating drive 8 pulls the peripheral pressure plate 9 away from the outer surface of the corresponding side of the outer periphery of the cover 1, the disengagement operation is completed.

[0049] Preferably, the reciprocating actuator 8 is a cylinder, and at least one reciprocating actuator 8 is provided on each of the peripheral pressure plates 9. With the above design, multiple reciprocating actuators 8 can work simultaneously.

[0050] Specifically, during operation, an external air injection device is connected to all cylinders via a rubber hose. Then, air is injected into all cylinders through the external air injection device so that all cylinders simultaneously push the corresponding peripheral pressure plate 9 to move.

[0051] It should be noted that each of the peripheral pressure plates 9 is provided with at least one reciprocating drive 8, which means that when encountering a long peripheral pressure plate 9, two or more cylinders can be provided on the peripheral pressure plate 9.

[0052] Preferably, the top positioning component 5 includes a gravity pressure plate 17 and a fixing plate 10 fixedly mounted on the fixing frame 7 and located directly above the upper end of the base support 2. A plurality of sliding columns 11 are mounted on the fixing plate 10. The lower end of each sliding column 11 faces the upper end of the base support 2, and the lower ends of all sliding columns 11 are positioned and connected to the upper surface of the gravity pressure plate 17. The upper end of each sliding column 11 serves as the load-bearing end (it should be noted that the upper end faces of multiple sliding columns 11 will be combined to form a load-bearing end face). The lower surface of the gravity pressure plate 17 serves as the pressure surface 6. When the cover 1 is positioned between the base support 2 and the peripheral shaping mechanism 3, the lower surface of the gravity pressure plate 17 abuts against the outer surface of the top of the cover 1.

[0053] With the above design, different amounts of gravity can be applied to the top of the cover 1.

[0054] Specifically, under normal circumstances, once the fixing frame 7 is installed outside the base 2, the gravity plate 17 will press on the top outer surface of the cover 1. However, sometimes it is found that the gravity is insufficient, so the weight is increased.

[0055] At this point, a heavy object can be placed directly on the bearing end face of the heavy object, that is, the pressure is increased by adding a heavy object, thereby ensuring that the top of the cover 1 is stably pressed. The addition or removal of the heavy object can be flexibly adjusted according to the actual assembly requirements, and the design of the sliding column 11 not only plays a guiding role, but also ensures the stability of the gravity pressure plate 17 during the up and down movement, avoiding uneven loading or jamming.

[0056] Preferably, the upper end face of the sliding column 11 is provided with an anti-detachment plate 12 to restrict the sliding column 11 from sliding axially away from the fixing plate 10.

[0057] With the above design, when the top positioning component 5 is detached from the cover 1, the detachment action of the top positioning component 5 can be achieved simply by moving the fixing bracket 7.

[0058] Preferably, the base 2 includes a bracket 13 with an open bottom surface, and the inner side wall of the bracket 13 has a plurality of elongated holes 14. The outer side wall and top edge of the bracket 13 are recessed to form a step 15 around the bracket 13.

[0059] With the above design, the gas inside the cover 1 will be discharged through the elongated hole 14 during the shrinking process, preventing the cover 1 from bulging due to untimely gas discharge.

[0060] The step 15 is mainly used to support the cover 1 so that the cover 1 will not sag when it contracts or is compressed.

[0061] Preferably, the outer edge of the open end of the cover 1 is provided with a flange 16 that surrounds the periphery of the cover 1.

[0062] With the above design, the flange 16 can abut against and be restrained by the step 15, thereby ensuring the stability of the cover 1 during assembly and preventing displacement or slippage due to uneven force. At the same time, the presence of the flange 16 enhances the structural strength of the edge of the cover 1, which is beneficial to maintaining the integrity of the shape during compression molding.

[0063] Working principle: For reference Figure 1 - Figure 5 ; During the shaping process, the cover 1 is first placed on the upper end of the base 2. After the upper end of the base 2 is fully attached to the inner wall of the cover 1, the circumferential shaping mechanism 3 is then placed on the outside of the base 2.

[0064] Specifically, since the cover 1 has four outer peripheral surfaces, namely two in the length direction and two in the width direction, once the fixing frame 7 moves together with the peripheral positioning parts 4 and the top positioning parts 5 and covers the bottom support 2, the peripheral positioning parts 4 will be aligned with the periphery of the cover 1 and the top positioning parts 5 will be aligned with the top of the cover 1. At this time, the gravity pressure plate 17 will press on the top outer surface of the cover 1, and the four peripheral pressure plates 9 will be aligned with the four outer peripheral surfaces of the cover 1 respectively.

[0065] Taking the outer circumferential surface of one length direction of the cover body 1 as an example, when pressure needs to be applied, all cylinders are directly driven to move together. At this time, the moving end of the cylinder in that direction works and presses the peripheral pressure plate 9 onto the outer circumferential surface of the cover body 1 along the length direction, thus completing the pressure application operation. Once the moving end of the driving cylinder pulls the peripheral pressure plate 9 away from the outer surface of the corresponding side of the outer circumference of the cover body 1, the detachment operation is completed.

[0066] If insufficient gravity is found, a weight can be placed directly on the bearing end face of the weight, that is, the pressure is increased by adding weight, thereby ensuring that the top of the cover 1 is stably pressed. The addition or removal of weights can be flexibly adjusted according to actual assembly needs, and the design of the sliding column 11 not only plays a guiding role, but also ensures the stability of the gravity pressure plate 17 during the up and down movement, avoiding uneven loading or jamming.

[0067] Once the mounting bracket 7 is removed, the gravity plate 17 slides down with the sliding column 11 until the anti-detachment plate 12 abuts against the mounting plate 10, preventing the gravity plate 17 from detaching. Subsequently, the mounting bracket 7 is removed, and the peripheral positioning member 4 and the top positioning member 5 are removed together.

[0068] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A self-draping, rotomolded thin cover product shaping device, the product comprising a cover body (1) with an open bottom end; characterized in that: The shaping device includes a base (2) and a peripheral shaping mechanism (3). The base (2) has an upper end for supporting the cover (1). The outer surface contour of the upper end of the base (2) matches the inner wall contour of the cover (1). The inner wall of the cover (1) and the upper end of the base (2) are in clearance fit or transition fit. The peripheral shaping mechanism (3) is installed on the outside of the base (2). Through the cooperation between the base (2) and the peripheral shaping mechanism (3), the cover (1) is positioned between the base (2) and the peripheral shaping mechanism (3). The peripheral shaping mechanism (3) includes a plurality of peripheral positioning elements (4) and a top positioning element (5). Each peripheral positioning element (4) is provided in a one-to-one correspondence with each surface of the periphery of the cover (1). The peripheral positioning element (4) is configured to apply pressure to the corresponding surface of the periphery of the cover (1). The top positioning element (5) is positioned directly above the cover (1). The top positioning element (5) has a pressure surface (6). The top positioning element (5) is configured to use gravity to apply pressure evenly to the pressure surface (6) on the top outer surface of the cover (1).

2. The self-draping compensation type rotational molding thin cover product shaping device according to claim 1, characterized in that: The peripheral shaping mechanism (3) also includes a fixing frame (7), which is covered on the outside of the base (2); All of the peripheral positioning elements (4) and the top positioning element (5) are positioned and connected to the fixing frame (7).

3. The self-draping compensation type rotational molding thin cover product shaping device according to claim 2, characterized in that: The peripheral positioning component (4) includes a peripheral pressure plate (9) and a reciprocating driver (8) positioned and connected to the fixed frame (7). The movable end of the reciprocating driver (8) is positioned and connected to the peripheral pressure plate (9). The peripheral pressure plate (9) is directly opposite any peripheral outer surface of the cover (1). The length and width of the peripheral pressure plate (9) are both less than or equal to the length and width of the peripheral outer surface of the cover (1).

4. The self-draping compensation type rotational molding thin cover product shaping device according to claim 3, characterized in that: The reciprocating drive (8) is a cylinder, and at least one reciprocating drive (8) is provided on each of the peripheral pressure plates (9).

5. The self-draping compensation type rotational molding thin cover product shaping device according to claim 2, characterized in that: The top positioning component (5) includes a gravity pressure plate (17) and a fixing plate (10) fixedly mounted on the fixing frame (7) and located directly above the upper end of the bottom support (2). Multiple sliding columns (11) are provided on the fixing plate (10). The lower end of the sliding column (11) is directly opposite the upper end of the base (2), and the lower ends of all the sliding columns (11) are positioned and connected to the upper surface of the gravity plate (17). The upper end of the sliding column (11) serves as the load-bearing end. The lower surface of the gravity plate (17) serves as the pressure surface (6). When the cover (1) is positioned between the base (2) and the peripheral shaping mechanism (3), the lower surface of the gravity pressure plate (17) abuts against the top outer surface of the cover (1).

6. The self-draping compensation type rotational molding thin cover product shaping device according to claim 5, characterized in that: The upper end face of the sliding column (11) is provided with an anti-detachment plate (12) to restrict the sliding column (11) from sliding axially away from the fixing plate (10).

7. The self-draping compensation type rotational molding thin cover product shaping device according to claim 1, characterized in that: The base (2) includes a bracket (13) with an open bottom surface, and the inner side wall of the bracket (13) has multiple elongated holes (14). The outer side wall and top edge of the bracket (13) are recessed to form a step (15) around the bracket (13).

8. The self-draping compensation type rotational molding thin cover product shaping device according to claim 1, characterized in that: The outer edge of the open end of the cover (1) is provided with a flange (16) that surrounds the periphery of the cover (1).

Images