A reciprocating demoulding machine

Abstract

The present invention discloses a reciprocating demoulding machine, which belongs to the technical field of demoulding machines, and comprises a load-bearing frame, a traction mechanism and a demoulding vehicle. A plurality of baffles are provided on both sides of the load-bearing frame along the length direction, and a guide rail is provided inside the load-bearing frame. The traction mechanism comprises a tractor and a hydraulic mechanism, the tractor slides along the guide rail direction, and cylinder plug plates are provided on both sides of the tractor. The demoulding vehicle is fixedly connected to the output end of the hydraulic mechanism, the demoulding vehicle slides along the guide rail direction, and a rotary joint is provided on the end of the demoulding vehicle close to the demoulding plate. During demoulding, the traction mechanism can pull the core mold out for a distance, and then the tractor moves on the guide rail to realize step-by-step demoulding, completing the automated demoulding process. During the traction process of the core mold, the core mold is passively rotated under the action of the rotary joint releasing the rotational freedom, thereby ensuring that the core mold is separated from the rifling of the product. The demoulding machine provided by the present invention realizes the automated demoulding of a firing barrel with rifling and a composite material shell.

Description

Technical Field

[0001] The invention belongs to the technical field of demoulding machines, in particular to a reciprocating demoulding machine. Background Art

[0002] Launch tubes and composite shells are hollow products, with the core mold located within the hollow area. Some products require rifling on the inner wall. Demolding such products requires not only overcoming adhesion and adsorption forces, but also removing the core mold by avoiding the rifling pattern. Adhesion is generated after the resin matrix and the mold interface are cured, while adsorption is generated by the near-vacuum interface created by the prepreg being applied to the mold under atmospheric pressure.

[0003] During the demoulding stage, the product is mainly demoulded by pulling out the core mold through a demoulding machine. Common demoulding machine models are mainly composed of a fixed load-bearing frame and a traction system, of which the traction system can be divided into screw transmission and hydraulic transmission. Screw transmission drives the traction machine to continuously retreat and pull out the core mold through the rotation of the screw. The advantage of this force transmission method is that the pulling process is continuous and uninterrupted, but due to the large length of the screw adapted to the length of the core mold, the strength requirements of the screw are high, and the upper limit of the traction force of the demoulding machine is low. Hydraulic force transmission pulls out the core mold through the piston rod of the hydraulic system. The advantage of this force transmission method is that the traction force is large, but due to the limited length of the piston rod, the traction machine needs to be manually moved and fixed every time a certain distance is pulled, resulting in low demoulding efficiency. Summary of the Invention

[0004] The purpose of the present invention is to provide a reciprocating demoulding machine to solve the problems raised in the above-mentioned prior art.

[0005] A reciprocating demoulding machine is provided, comprising:

[0006] A load-bearing frame, wherein a plurality of baffles are provided on both sides of the load-bearing frame along the length direction, a guide rail is provided inside the load-bearing frame, and a stripping plate is provided at the end of the load-bearing frame;

[0007] The traction mechanism includes a tractor and a hydraulic mechanism, wherein the hydraulic mechanism is fixedly connected to the tractor, the tractor slides along the guide rail, and cylinder plates are respectively provided on both sides of the tractor;

[0008] The demoulding car is fixedly connected to the output end of the hydraulic mechanism, and the demoulding car slides along the guide rail. A rotary joint is provided at one end of the demoulding car close to the demoulding plate.

[0009] As a further solution of the present invention: it also includes a re-mold bracket, which is arranged on the side of the stripping plate away from the load-bearing frame. The re-mold bracket includes a re-mold track and several re-mold trolleys, and several of the re-mold trolleys slide along the re-mold track.

[0010] As a further solution of the present invention: the re-mold trolley includes a screw lifting device, two rolling rollers and a roller adjustment device, the screw lifting device is used to drive the two rolling rollers to rise and fall synchronously, and the roller adjustment device is transmission-connected to at least one rolling roller.

[0011] As a further solution of the present invention: the mold re-forming trolley further comprises a roller rotating motor, and the output shaft of the roller rotating motor is fixedly connected to the axis of one of the rolling rollers.

[0012] As a further solution of the present invention: joint plug plates are respectively provided on both sides of the demoulding vehicle.

[0013] As a further solution of the present invention: the demoulding vehicle also includes a pull rod connecting shaft and a force sensor, one end of the force sensor is fixedly connected to the demoulding vehicle, and the other end of the force sensor is fixedly connected to the output end of the hydraulic mechanism through the pull rod connecting shaft.

[0014] As a further solution of the present invention: a drive motor is provided in the demoulding vehicle, and the drive motor is used to drive the demoulding vehicle to move on the guide rail.

[0015] As a further solution of the present invention: the guide rail includes an upper rail and a lower rail, the wheel systems of the tractor and the demoulding vehicle are guided by the upper rail and the lower rail at the same time, and the upper rail and the lower rail are arranged on the inner side wall of the load-bearing frame.

[0016] As a further solution of the present invention: the guide rail is a channel steel with one side concave inward, a plurality of baffles are arranged on the top of the guide rail, and the wheel systems of the tractor and the demoulding vehicle are both located inside the guide rail.

[0017] As a further solution of the present invention: a plurality of displacement sensors are provided on the load-bearing frame.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] During demoulding, the traction mechanism can pull the core mold out for a certain distance, and then the tractor moves on the guide rail to realize step-by-step demoulding, completing the automated demoulding process. The retractable oil cylinder plug plate abuts against the baffle to provide a reaction force to the traction mechanism, converting the traction force of the traction mechanism into the internal force of the load-bearing frame, reducing the fixing strength requirements between the load-bearing frame and the foundation. During the traction process of the core mold, it rotates passively under the action of the rotary joint releasing the rotational freedom, ensuring that the core mold is separated from the rifling of the product. The demoulding machine provided by the present invention realizes the automated demoulding of the launch barrel with rifling and the composite material shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] To facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0021] Figure 1 It is a schematic diagram of the overall structure of a reciprocating demoulding machine;

[0022] Figure 2 It is a partial structural schematic diagram of a reciprocating demoulding machine in one embodiment;

[0023] Figure 3 for Figure 1 Enlarged view of area A in the middle;

[0024] Figure 4 A schematic structural diagram of a re-mold trolley provided in an embodiment of the present invention;

[0025] Figure 5 It is a partial structural schematic diagram of a reciprocating demoulding machine in another embodiment.

[0026] In the figure: 1. Load-bearing frame; 11. Baffle; 12. Guide rail; 121. Upper rail; 122. Lower rail; 13. Stripping plate; 2. Traction mechanism; 21. Traction vehicle; 22. Hydraulic mechanism; 23. Cylinder plug plate; 3. Stripping vehicle; 31. Rotary joint; 32. Joint plug plate; 33. Pull rod connecting shaft; 34. Force sensor; 4. Re-mold bracket; 41. Re-mold track; 42. Re-mold trolley; 421. Screw lifting device; 422. Rolling roller; 423. Roller adjustment device; 424. Roller rotating motor. DETAILED DESCRIPTION

[0027] In order to make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present invention and are not intended to limit the present invention. That is, the embodiments described herein are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and illustrated in the drawings herein may be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely intended to represent selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0029] See also Figure 1-3As shown, in an embodiment of the present invention, a load-bearing frame 1, a traction mechanism 2 and a demoulding vehicle 3 are included. A plurality of baffles 11 are provided on both sides of the load-bearing frame 1 along the length direction, a guide rail 12 is provided inside the load-bearing frame 1, and a demoulding plate 13 is provided at the end of the load-bearing frame 1. The traction mechanism 2 includes a tractor 21 and a hydraulic mechanism 22. The hydraulic mechanism 22 is fixedly connected to the tractor 21, and the tractor 21 slides along the guide rail 12. Cylinder inserts 23 are respectively provided on both sides of the tractor 21. The demoulding vehicle 3 is fixedly connected to the output end of the hydraulic mechanism 22, and the demoulding vehicle 3 slides along the guide rail 12. A rotary joint 31 is provided at one end of the demoulding vehicle 3 close to the demoulding plate 13.

[0030] During demolding, the product with the core mold is placed on the side of the demolding plate 13 away from the load-bearing frame 1. The product abuts the surface of the demolding plate 13, while the core mold is connected to the demolding vehicle 3, ready to penetrate the demolding plate 13. Because the demolding vehicle 3 is fixedly connected to the traction mechanism 2, the demolding vehicle 3 acts as a transitional structure, capable of transmitting the traction force of the traction mechanism 2 to the core mold through the demolding vehicle 3. The traction force of the traction mechanism 2 is provided by the hydraulic mechanism 22, which includes a hydraulic oil tank, a hydraulic pump, a hydraulic cylinder, and a cylinder tie rod, all mounted on the traction vehicle 21. The output shaft of the cylinder tie rod is fixedly connected to the demolding vehicle 3, and the cylinder tie rod provides traction by retracting the output shaft.

[0031] In this embodiment, the demolding length of the traction mechanism 2 for a single demolding is 1500 mm, which matches the telescopic length of the cylinder pull rod. This distance is also the distance between the center axes of the two front and rear baffles 11 along the length direction of the load-bearing frame 1. The cylinder insert plate 23 on the tractor 21 can achieve telescopic movement under the action of the actuator. During the traction process, the cylinder insert plate 23 extends and contacts the baffle 11, and the traction force is transmitted to the baffle 11 through the cylinder insert plate 23 and converted into the internal force of the load-bearing frame 1. When the traction mechanism 2 completes a traction, the cylinder insert plate 23 retreats and breaks contact with the baffle 11, and the tractor 21 retreats to a distance of 1500 mm along the guide rail 12. During the retreat of the tractor 21, the output shaft of the hydraulic mechanism 22 re-extends. After the tractor 21 retreats to the set position, the cylinder insert plate 23 re-extends and contacts the baffle 11, and then the next cycle of traction is carried out to achieve multiple demolding.

[0032] Furthermore, joint plates 32 are provided on both sides of the demoulding vehicle 3, and the joint plates 32 can realize telescopic movement through the actuator. When the traction mechanism 2 completes a traction, the cylinder plate 23 retracts and disconnects from the baffle 11, and at the same time, the joint plate 32 extends and contacts the baffle 11. After the joint plate 32 contacts the baffle 11, the output shaft of the hydraulic mechanism 22 extends again, and at this time, the demoulding vehicle 3 cannot move due to the restriction of the joint plate 32 and the baffle 11. The thrust of the tractor 21 when retreating is transmitted to the baffle 11 through the demoulding vehicle 3 and converted into the internal force of the load-bearing frame 1, and will not be transmitted to the core mold, thereby preventing the core mold from being subjected to a thrust in the opposite direction of the traction force, causing the core mold to retreat, thereby reducing the traction efficiency. After the tractor 21 retreats to the set position, the joint plate 32 retracts and disconnects from the baffle 11, and at the same time, the cylinder plate 23 extends again and contacts the baffle 11.

[0033] A drive motor is provided in the demoulding vehicle 3, and the drive motor is used to drive the demoulding vehicle 3 to move on the guide rail 12. When the core mold is completely removed, the drive motor can drive the demoulding vehicle 3 to actively retreat to the demoulding plate 13 on the guide rail 12 to achieve automatic movement.

[0034] The rotary joint 31 can rotate relative to the demolding vehicle 3, and has the same function as a bearing. The arc-shaped guide rail on the outer ring of the rotary joint 31 is fixedly connected to the demolding vehicle 3, and the outer periphery of the inner ring rotates and slides with the arc-shaped guide rail. The inner periphery of the inner ring is used to fix to the core mold. During the traction process, the core mold gradually passes through the demolding plate 13 and enters the load-bearing frame 1, while the product outside the core mold stays in place under the restriction of the demolding plate 13. The process of separation between the core mold and the product is affected by the rifling and accompanied by the rotation of the core mold. Therefore, the function of the rotary joint 31 is to provide the core mold with freedom in the direction of rotation, reduce the friction when the core mold rotates, and reduce the traction required for separation.

[0035] See also Figure 1 As shown, the present invention also includes a re-mold support 4, which is positioned on the side of the stripper plate 13 away from the load-bearing frame 1. The re-mold support 4 includes a re-mold track 41 and a plurality of re-mold trolleys 42, which slide along the re-mold track 41. The re-mold support 4 is used to support the product and maintain stability during demolding. The re-mold trolleys 42 are movable on the re-mold track 41 to accommodate products of different lengths.

[0036] See also Figure 4As shown, the mold reloading trolley 42 includes a screw lifting device 421, two rollers 422, and a roller adjustment device 423. The screw lifting device 421 includes a scissor brace structure and a screw assembly. The screw of the screw assembly rotates, driving the slider on the screw, which in turn drives the bottom of the scissor brace structure to control the opening and closing of the scissor brace structure. When the scissor brace structure opens and closes, the upper platform is raised and lowered. The two rollers 422 are installed on the platform. The screw lifting device 421 is used to drive the two rollers 422 to rise and fall synchronously to accommodate products of different diameters for demolding.

[0037] The roller adjustment device 423 is in transmission connection with at least one roller 422. Similarly, through the cooperation of a screw and a motor, at least one roller 422 can be moved on the platform, thereby adjusting the distance between the two rollers 422. Specifically, the motor drives the screw, which in turn drives the slider above it to move, and the slider in turn drives the roller 422 to translate, so as to adapt to products of different diameters for demolding.

[0038] Furthermore, the mold reloading carriage 42 includes a roller rotation motor 424, the output shaft of which is fixedly connected to the axis of one of the rolling rollers 422. Because the rolling roller 422 is in contact with the product, the roller rotation motor 424, when activated, can actively rotate the rolling roller 422 in the direction opposite to the rotation of the mandrel. When the product and mandrel rotate in opposite directions, the mutual stress and friction between them is reduced, reducing the required traction force, protecting the rifling structure from stress damage, and increasing the demolding speed.

[0039] See also Figure 1 and Figure 2 As shown, the demolding vehicle 3 also includes a tie rod coupling 33 and a force sensor 34. One end of the force sensor 34 is fixedly connected to the demolding vehicle 3, while the other end is fixedly connected to the output end of the hydraulic mechanism 22 via the tie rod coupling 33. The tie rod coupling 33 serves as a structural transition, connecting the force sensor 34 to the output shaft of the hydraulic mechanism 22 and transmitting the applied force. The force sensor 34 monitors the force applied to the cylinder tie rod and the demolding vehicle 3, and transmits the monitored force to the display screen for reference.

[0040] In one embodiment, see Figure 1-3As shown, the guide rail 12 includes an upper rail 121 and a lower rail 122. The wheel systems of the tractor 21 and the demoulding vehicle 3 are guided by the upper rail 121 and the lower rail 122 at the same time. The upper rail 121 and the lower rail 122 are arranged on the inner side wall of the load-bearing frame 1. In this embodiment, the guide rail 12 composed of the upper rail 121 and the lower rail 122 is at the same horizontal height as the plurality of baffles 11. The wheels of the tractor 21 and the demoulding vehicle 3 cooperate with the upper rail 121 and the lower rail 122 at the same time, which can improve the stability of the tractor 21 and the demoulding vehicle 3 during operation and prevent the core mold from moving during traction. The upper rail 121 and the lower rail 122 are integrated with the load-bearing frame 1, which can improve the overall strength of the structure and maximize the use of the internal space of the load-bearing frame 1.

[0041] In one embodiment, see Figure 5 As shown, the guide rail 12 is a steel channel with one side recessed inward. Several baffles 11 are positioned atop the guide rail 12. The wheel trains of the tractor 21 and the stripper 3 are both located within the guide rail 12. The wheel trains of the tractor 21 and the stripper 3 move within the steel channel of the guide rail 12. The restraints of the steel channel prevent the tractor 21 and the stripper 3 from swerving sideways during movement, enhancing operational stability. In this embodiment, the guide rail 12 and the baffles 11 are not at the same level, allowing them to avoid the extension and retraction range of the cylinder insert 23, preventing interference.

[0042] A number of displacement sensors are provided on the load-bearing frame 1, which can accurately sense the positions of the demoulding vehicle 3 and the tractor 21 during their operation, and prevent the cylinder insert plate 23 from being positioned inaccurately and causing the cylinder insert plate 23 to collide with the baffle 11 during its extension.

[0043] The reciprocating demoulding machine provided in this application can realize the automation of the entire demoulding process, greatly improving the demoulding efficiency.

[0044] The above content is merely an example and explanation of the structure of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the scope of protection of the present invention.

Claims

1. A reciprocating demoulding machine, characterized in that: include: A load-bearing frame (1), wherein a plurality of baffles (11) are provided on both sides of the load-bearing frame (1) along the length direction, a guide rail (12) is provided inside the load-bearing frame (1), and a stripping plate (13) is provided at the end of the load-bearing frame (1); A traction mechanism (2) comprising a tractor (21) and a hydraulic mechanism (22), wherein the hydraulic mechanism (22) is fixedly connected to the tractor (21), the tractor (21) slides along the guide rail (12), and cylinder insert plates (23) are respectively provided on both sides of the tractor (21); A demoulding vehicle (3), wherein the demoulding vehicle (3) is fixedly connected to the output end of the hydraulic mechanism (22), the demoulding vehicle (3) slides along the guide rail (12), a rotary joint (31) is provided at one end of the demoulding vehicle (3) close to the demoulding plate (13), joint plug plates (32) are provided on both sides of the demoulding vehicle (3), the demoulding vehicle (3) further comprises a tie rod connecting shaft (33) and a force sensor (34), one end of the force sensor (34) is fixedly connected to the demoulding vehicle (3), and the other end of the force sensor (34) is fixedly connected to the output end of the hydraulic mechanism (22) via the tie rod connecting shaft (33); A re-mold support (4), wherein the re-mold support (4) is arranged on a side of the stripping plate (13) away from the load-bearing frame (1), the re-mold support (4) includes a re-mold track (41) and a plurality of re-mold trolleys (42), the plurality of re-mold trolleys (42) slide along the re-mold track (41), the re-mold trolleys (42) include a screw lifting device (421), two rolling rollers (422), a roller adjustment device (423) and a roller rotating motor (424), the screw lifting device (421) is used to drive the two rolling rollers (422) to rise and fall synchronously, the roller adjustment device (423) is transmission-connected to at least one rolling roller (422), and the output shaft of the roller rotating motor (424) is fixedly connected to the axis of one of the rolling rollers (422).

2. A reciprocating demoulding machine according to claim 1, characterized in that, A drive motor is provided in the demoulding vehicle (3), and the drive motor is used to drive the demoulding vehicle (3) to move on the guide rail (12).

3. A reciprocating demoulding machine according to claim 1, characterized in that, The guide rail (12) comprises an upper rail (121) and a lower rail (122); the wheel trains of the tractor (21) and the demoulding vehicle (3) are guided by the upper rail (121) and the lower rail (122); and the upper rail (121) and the lower rail (122) are arranged on the inner side wall of the load-bearing frame (1).

4. A reciprocating demoulding machine according to claim 1, characterized in that: The guide rail (12) is a channel steel with one side concave inward, and a plurality of baffles (11) are arranged on the top of the guide rail (12). The wheel trains of the tractor (21) and the demoulding vehicle (3) are both located inside the guide rail (12).

5. A reciprocating demoulding machine according to claim 1, characterized in that: A plurality of displacement sensors are provided on the load-bearing frame (1).

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