Demoulding machine for core mould demoulding

Abstract

The invention discloses a demolding machine for demolding a core mold, which belongs to the technical field of demolding machines and comprises workpiece lifting equipment, traction equipment, a plurality of force transmission devices and a fixed heavy frame. The traction equipment comprises a guide rail, a movable tractor and a plurality of hydraulic oil cylinders. The force transmission device comprises a fixed base, a turning plate, a force transmission mandrel and a first execution mechanism. And the fixed force bearing frame is arranged between the workpiece lifting equipment and the plurality of force transmission devices. The turning plate can turn over relative to the fixed base, and when the turning plate is not turned up, the movable tractor can avoid the force transmission mandrel to move on the guide rail; and after the turning plate is turned up, the piston rod of the hydraulic oil cylinder can transmit the force to the force transmission core shaft. The operation of automatically extending the connecting rod of the hydraulic oil cylinder is realized through the automatic overturning of the overturning plate and the movement of the movable tractor, the increased labor amount of manual debugging is avoided, and the demolding efficiency of the core mold is improved.

Description

Technical Field

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

[0002] The launch tube and other composite shells are hollow products, and the core mold is located in the hollow part of the product. The demoulding of composite products requires overcoming adhesion and adsorption forces. The adhesion force is generated after the resin matrix and the mold bonding surface are cured and formed, and the adsorption force is the adsorption force generated under atmospheric pressure when the interface is in a nearly vacuum state when the prepreg is laid on the mold. Therefore, the demoulding of composite products must rely on external forces to overcome the adhesion and adsorption forces of the product on the mold.

[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 force transmission and hydraulic force transmission. Screw force 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, and the demoulding efficiency is low. Summary of the invention

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

[0005] Provided is a demoulding machine for ejecting a core mold, comprising:

[0006] Workpiece lifting equipment;

[0007] The traction equipment comprises a guide rail, a movable tractor and a plurality of hydraulic cylinders, wherein the movable tractor is slidably connected to the guide rail, and the plurality of hydraulic cylinders are respectively arranged on both sides of the movable tractor;

[0008] A plurality of force transmission devices, wherein the plurality of force transmission devices are arranged on both sides of the moving path of the movable tractor, the force transmission devices include a fixed base, a flap, a force transmission mandrel and a first actuator, the force transmission mandrel is arranged at one end of the flap, the other end of the flap is hinged to the fixed base, and the fixed base and the flap are connected by transmission through the first actuator;

[0009] A fixed load-bearing frame is arranged between the workpiece lifting equipment and a plurality of force transmission devices.

[0010] As a further solution of the present invention: the force transmission core shaft and the flap are slidably connected, and when the flap close to one end of the fixed load-bearing frame rotates to an extreme angle toward the movable tractor, the force transmission core shaft on the flap and the fixed load-bearing frame can contact each other.

[0011] As a further solution of the present invention: when the flap is rotated to a limit angle in the direction of the movable tractor, a plurality of the force transmission core shafts are coaxially arranged, and the piston rod of the hydraulic cylinder is coaxially arranged with the force transmission core shaft.

[0012] As a further solution of the present invention: at least one second actuator is provided on the side wall of the fixed base, and when the flap is rotated to an extreme angle in the direction of the movable tractor, a pin hole is opened at the relative position of the flap and the second actuator, and the output shaft of the second actuator respectively movably passes through the fixed base and the pin hole.

[0013] As a further solution of the present invention: the guide rail extends to the workpiece lifting equipment, the workpiece lifting equipment includes a plurality of workpiece lifting vehicles, the plurality of workpiece lifting vehicles are slidably connected to the guide rail, the workpiece lifting vehicles include a lifting platform and two limit platforms, the two limit platforms are respectively arranged on both sides of the lifting platform, and the two limit platforms form an angle of α degree between them, and the angle α is 60°~120°.

[0014] As a further solution of the present invention: it also includes a core mold lifting device, which includes a fixed core mold lifting vehicle and a plurality of movable core mold lifting vehicles, the fixed core mold lifting vehicle is located near the fixed load-bearing frame close to the side of the traction device, and the plurality of movable core mold lifting vehicles are slidably connected to the guide rail.

[0015] As a further solution of the present invention: a plurality of the hydraulic cylinders are controlled by a hydraulic synchronization valve.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The flap in the present invention can be flipped relative to the fixed base. When the flap is not flipped up, the movable tractor can avoid the force transmission mandrel and move on the guide rail to control the distance between the movable tractor and the core mold; and when the flap is flipped up, the piston rod of the hydraulic cylinder can transmit force to the force transmission mandrel, giving the movable tractor a point of force to remove the core mold. The automatic flipping of the flap and the movement of the movable tractor realize the operation of automatically extending the connecting rod of the hydraulic cylinder, avoiding the labor increased by manual debugging, and improving the demoulding efficiency of the core mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0019] Figure 1It is a structural schematic diagram of a working state 1 of a demoulding machine for ejecting a core mold;

[0020] Figure 2 It is a structural schematic diagram of a demoulding machine for ejecting a core mold in working state 2;

[0021] Figure 3 for Figure 2 A magnified image of area A;

[0022] Figure 4 for Figure 2 Enlarged view of area B;

[0023] Figure 5 for Figure 2 Enlarged view of the middle C area;

[0024] Figure 6 for Figure 2 Enlarged view of area D in the middle;

[0025] Figure 7 A schematic diagram of the structure of a core mold lifting device provided in an embodiment of the present invention;

[0026] Figure 8 A schematic diagram of the structure of a force transmission device provided in an embodiment of the present invention;

[0027] Fig. 9 This is a structural layout diagram of a limit platform provided in an embodiment of the present invention.

[0028] In the figure: 1. workpiece lifting equipment; 11. workpiece lifting vehicle; 111. lifting platform; 112. limiting platform; 2. traction equipment; 21. guide rail; 22. movable traction vehicle; 23. hydraulic cylinder; 3. force transmission device; 31. fixed base; 311. second actuator; 32. flap; 321. pin hole; 33. force transmission mandrel; 34. first actuator; 4. fixed load-bearing frame; 5. core mold lifting equipment; 51. fixed core mold lifting vehicle; 52. movable core mold lifting vehicle. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the embodiments described are only part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0030] 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 claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0031] See also Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, in the embodiment of the present invention, a workpiece lifting device 1, a traction device 2, a plurality of force transmission devices 3 and a fixed load-bearing frame 4 are included. The traction device 2 includes a guide rail 21, a movable tractor 22 and a plurality of hydraulic cylinders 23. The movable tractor 22 is slidably connected to the guide rail 21, and the plurality of hydraulic cylinders 23 are respectively arranged on both sides of the movable tractor 22. The plurality of force transmission devices 3 are arranged on both sides of the moving path of the movable tractor 22. The force transmission device 3 includes a fixed base 31, a flap 32, a force transmission mandrel 33 and a first actuator 34. The force transmission mandrel 33 is arranged at one end of the flap 32, and the other end of the flap 32 is hinged to the fixed base 31. The fixed base 31 and the flap 32 are transmission-connected through the first actuator 34. The fixed load-bearing frame 4 is arranged between the workpiece lifting device 1 and the plurality of force transmission devices 3.

[0032] When the demoulding machine is working, the workpiece with the core mold is placed on the workpiece lifting device 1. After the workpiece passes through the fixed load-bearing frame 4, the shaft end of the core mold is assembled with the clamp on the movable tractor 22 and fixed with a pin. The demoulding retaining ring is fixed on the fixed load-bearing frame 4 to block the end face of the launch tube to ensure that the core mold and the product can slide relative to each other after the core mold is stressed. The fixed load-bearing frame 4 is tightly connected to the base layer, and the base layer can be made into a whole with the foundation using large screws and steel plates to ensure sufficient structural strength.

[0033] At the initial stage of demoulding, the flaps 32 all rotate away from the movable tractor 22 and remain in the unflipped state. The movable tractor 22 drives to the vicinity of the fixed load-bearing frame 4 and pushes the piston rods of the hydraulic cylinders 23 on both sides against the fixed load-bearing frame 4. After the hydraulic system is started, the piston rods on the hydraulic cylinders 23 gradually extend. As the piston rods of the hydraulic cylinders 23 on both sides are pushed out, the movable tractor 22 drives the core mold to gradually escape from the launch tube for a distance. After the piston rods are pushed out to the limit distance, the hydraulic system is paused and the piston rods are retracted. At this time, the piston rods are separated from the fixed load-bearing frame 4 by the distance of a force transmission device 3. The first actuator 34 on the corresponding force transmission device 3 is started, and the first actuator 34 drives the flap 32 to rotate relative to the fixed base 31. After the flap 32 rotates to the limit angle, it stops. At this time, the force transmission mandrel 33 is directly opposite to the piston rod of the hydraulic cylinder 23.

[0034] In one embodiment, the force transmission mandrel 33 is fixedly connected to the flap 32. The hydraulic system is started, and the piston rod of the hydraulic cylinder 23 is pushed out to contact the force transmission mandrel 33. The force transmission mandrel 33 transmits force to the flap 32, and the flap 32 then transmits force to the fixed base 31, and the fixed base 31 is fixed to the ground or other base. The traction force of the movable tractor 22 is balanced by the force of the force transmission device 3 and the ground. When this section of the core mold is released, the hydraulic system is paused and the piston rod is retracted, and the next level of flap 32 is turned over to complete this section of the demoulding process. The above operation is repeated until the core mold is completely released.

[0035] In one embodiment, the force transmission mandrel 33 and the flap 32 are connected by sliding. When the flap 32 near one end of the fixed load-bearing frame 4 rotates to the limit angle in the direction of the movable tractor 22, the force transmission mandrel 33 on the flap 32 and the fixed load-bearing frame 4 can contact each other. Continue to start the hydraulic system, the piston rod of the hydraulic cylinder 23 is pushed out and contacts the force transmission mandrel 33, and a slight sliding occurs between the force transmission mandrel 33 and the flap 32, so that the force transmission mandrel 33 and the fixed load-bearing frame 4 contact each other. This structure transmits the thrust of the piston rod to the fixed load-bearing frame 4 through the force transmission mandrel 33, and the traction of the movable tractor 22 is balanced by the fixed load-bearing frame 4. The fixed load-bearing frame 4 is welded from large profiles and steel plates, and has sufficient strength and rigidity to withstand a demolding force of 500 tons.

[0036] Furthermore, whenever the core mold is pulled out of this section of the force transmission device 3, the hydraulic system is paused and the piston rod is retracted, and the next level flap 32 is turned over. Since the force transmission mandrel 33 can move freely in the axial direction relative to the flap 32, the piston rod can transmit the force to the fixed load-bearing frame 4 step by step through the next section of the force transmission mandrel 33, and repeat this operation until the core mold is completely removed. This structure will not transmit the force to the fixed base 31, thereby greatly reducing the structural strength requirements of the force transmission device 3. The force is finally transmitted to the fixed load-bearing frame 4 through several force transmission mandrels 33, which increases the upper limit of the traction force of the demoulding machine.

[0037] See also Figure 2 and Figure 4 As shown, since the launch tube applies the force to the side of the fixed load-bearing frame 4 away from the force transmission device 3, and the force transmission device 3 applies the force to the other side of the fixed load-bearing frame 4, when the core mold is slowly pulled out, the forces on both sides of the fixed load-bearing frame 4 can be approximately regarded as a pair of balanced forces. Therefore, the force form of the fixed load-bearing frame 4 is approximately compressed on both sides, with only a small bending moment, and the force form distribution is reasonable, which can greatly increase the upper limit of the bearing capacity of the fixed load-bearing frame 4.

[0038] In addition, since the force transmission core shaft 33 and the flap 32 are movable, a force transmission path is provided, and the flipping of the flap 32 is performed automatically, the operation of automatically extending the connecting rod of the hydraulic cylinder 23 is realized, and there is no need for personnel to adjust the position of the movable tractor 22 or fix the vehicle body, which greatly reduces the labor workload in the demolding process.

[0039] The number of force transmission devices 3 used is adjusted accordingly according to the length of the product. Each time a stroke is pulled out, the force transmission device 3 is increased by one unit until the demolding process is completed.

[0040] When the flap 32 rotates to the limit angle in the direction of the movable tractor 22, a plurality of force transmission mandrels 33 are coaxially arranged, and the piston rod of the hydraulic cylinder 23 is coaxially arranged with the force transmission mandrel 33. This arrangement ensures that the force between the force transmission mandrels 33 is axially transmitted, avoiding eccentric transmission. Eccentric force transmission will cause part of the force to be distributed to other components such as the flap 32, which will reduce the service life of the force transmission device 3 at best, and even cause deformation of the components, resulting in collapse and damage, reducing the traction capacity of the demoulding device.

[0041] See also Figure 6 and Figure 8 As shown, at least one second actuator 311 is provided on the side wall of the fixed base 31, and the second actuator 311 can be one of an electric cylinder, a pneumatic cylinder, and a hydraulic cylinder. When the flap 32 rotates to the limit angle in the direction of the movable tractor 22, a pin hole 321 is provided at the relative position between the flap 32 and the second actuator 311, and the output shaft of the second actuator 311 movably penetrates the fixed base 31 and the pin hole 321 respectively. A latch is provided on the output shaft of the second actuator 311, and when the output shaft is extended, the latch passes through the side wall of the fixed base 31 and the pin hole 321 respectively. Through the cooperation of the latch and the pin hole 321, a limiting mechanism is provided between the flap 32 and the fixed base 31 after it is flipped up, so as to prevent the flap 32 from moving under the action of the lateral force and improve the stability.

[0042] See also Figure 3 and Fig. 9As shown, the guide rail 21 extends to the workpiece lifting device 1, and the workpiece lifting device 1 includes a plurality of workpiece lifting vehicles 11, and the plurality of workpiece lifting vehicles 11 are slidably connected to the guide rail 21. The workpiece lifting vehicle 11 is used to support the product to be demolded, and the guide rail 21 is a track for the movement of the plurality of workpiece lifting vehicles 11, and adopts a double ground rail form. The workpiece lifting vehicle 11 includes a lifting platform 111 and two limit platforms 112, and the two limit platforms 112 are respectively arranged on both sides of the lifting platform 111. A lifting device is arranged in the lifting platform 111, and the lifting and lowering are controlled by a motor and an electric screw rod. There is a busbar power supply system on one side of the guide rail 21 to ensure that the motor is powered when the workpiece lifting vehicle 11 moves, and the lifting platform 111 is lifted and lowered to eject the product. There is an angle of α degrees between the two limit platforms 112, and the α angle is 60° to 120°. The limit platforms 112 on both sides are used to limit the lateral freedom of the product.

[0043] Furthermore, the two limiting platforms 112 form an included angle of α degrees, and the angle α is 90 degrees, which can adapt to the demoulding of square workpieces.

[0044] See also Figure 6 and Figure 7 As shown, the demoulding machine also includes a core mold lifting device 5, which includes a fixed core mold lifting vehicle 51 and a plurality of movable core mold lifting vehicles 52. The plurality of movable core mold lifting vehicles 52 are slidably connected to the guide rail 21, and the guide rail 21 is a track for the plurality of movable core mold lifting vehicles 52 to move. The fixed core mold lifting vehicle 51 is located near the side of the fixed bearing frame 4 close to the traction device 2. The movable core mold lifting vehicle 52 can move synchronously with the core mold being ejected, and the fixed core mold lifting vehicle 51 is used to prevent the core mold from tipping over to one end after the core mold is completely ejected.

[0045] In addition, the structures of the fixed core mold lifting vehicle 51 and the movable core mold lifting vehicle 52 may be the same as the workpiece lifting vehicle 11, and will not be described in detail herein.

[0046] The hydraulic cylinders 23 are controlled by hydraulic synchronization valves to ensure synchronous operation of the hydraulic cylinders 23 and avoid uneven demoulding force on both sides.

[0047] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described 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 protection scope of the present invention.

Claims

1. A demoulding machine for removing a core mold, characterized in that: include: Workpiece lifting equipment (1); A traction device (2), comprising a guide rail (21), a movable traction vehicle (22) and a plurality of hydraulic cylinders (23), wherein the movable traction vehicle (22) is slidably connected to the guide rail (21), and the plurality of hydraulic cylinders (23) are respectively arranged on both sides of the movable traction vehicle (22); A plurality of force transmission devices (3), wherein the plurality of force transmission devices (3) are arranged on both sides of the moving path of the movable tractor (22), the force transmission devices (3) comprising a fixed base (31), a flap (32), a force transmission mandrel (33) and a first actuator (34), the force transmission mandrel (33) being arranged at one end of the flap (32), the other end of the flap (32) being hinged to the fixed base (31), and the fixed base (31) and the flap (32) being transmission-connected via the first actuator (34); A fixed load-bearing frame (4) is arranged between the workpiece lifting device (1) and a plurality of force transmission devices (3).

2. A demoulding machine for removing a core mold according to claim 1, characterized in that: The force transmission core shaft (33) and the flap (32) are slidably connected, and when the flap (32) close to one end of the fixed load-bearing frame (4) rotates to a limit angle in the direction of the movable tractor (22), the force transmission core shaft (33) on the flap (32) and the fixed load-bearing frame (4) can contact each other.

3. A demoulding machine for removing a core mold according to claim 2, characterized in that: When the plurality of flaps (32) are rotated to a limit angle in the direction of the movable tractor (22), the plurality of force transmission core shafts (33) are coaxially arranged, and the piston rod of the hydraulic oil cylinder (23) is coaxially arranged with the force transmission core shaft (33).

4. A demoulding machine for removing a core mold according to claim 1, characterized in that: At least one second actuator (311) is disposed on the side wall of the fixed base (31); when the flap (32) rotates to a limit angle in the direction of the movable tractor (22), a pin hole (321) is provided at a relative position between the flap (32) and the second actuator (311); and an output shaft of the second actuator (311) movably penetrates the fixed base (31) and the pin hole (321).

5. A demoulding machine for removing a core mold according to claim 1, characterized in that: The guide rail (21) extends to the workpiece lifting device (1), and the workpiece lifting device (1) includes a plurality of workpiece lifting vehicles (11), and the plurality of workpiece lifting vehicles (11) are slidably connected to the guide rail (21). The workpiece lifting vehicles (11) include a lifting platform (111) and two limit platforms (112), and the two limit platforms (112) are respectively arranged on both sides of the lifting platform (111), and an angle of α degree is formed between the two limit platforms (112), and the angle α is 60° to 120°.

6. A demoulding machine for removing a core mold according to claim 1, characterized in that: It also includes a core mold lifting device (5), which includes a fixed core mold lifting vehicle (51) and a plurality of movable core mold lifting vehicles (52), wherein the fixed core mold lifting vehicle (51) is located near the fixed load-bearing frame (4) on one side close to the traction device (2), and the plurality of movable core mold lifting vehicles (52) are slidably connected to the guide rail (21).

7. A demoulding machine for removing a core mold according to claim 1, characterized in that: The plurality of hydraulic cylinders (23) are controlled by hydraulic synchronization valves.

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