Casting device for hydraulic actuator production

Abstract

A casting device for hydraulic actuator production comprises a base, a rotating body is arranged on the base, a lower die and a hydraulic cylinder are arranged on the rotating body, the output end of the hydraulic cylinder is fixedly connected with a movable plate, and an upper die is fixed to the movable plate; symmetrical clamping pieces are arranged at the runner of the lower mold, an ejection frame is arranged at the runner, and the ejection frame can be jacked up; sliding columns are arranged at the bottoms of the clamping pieces, a linkage piece is arranged between the symmetrical clamping pieces, symmetrical sliding grooves are formed in the linkage piece, the sliding columns are arranged in the sliding grooves, the linkage piece is fixedly connected with an ejector rod, a boss is fixedly arranged on the ejection frame, and the ejector rod penetrates through the boss; a first spring arranged outside the ejector rod in a sleeving mode is arranged between the linkage piece and the bearing protrusion, and the first spring is fixedly connected with the linkage piece and the bearing protrusion and is in a stretching deformation state all the time. An abutting block is fixed to the base, and the ejector rod abuts against the abutting block downwards. The device acts in a mechanical connection and linkage mode, and can stably work in a high-temperature environment of a casting process.

Description

Technical Field

[0001] The invention relates to the field of casting, and in particular to a casting device for producing a hydraulic actuator. Background Art

[0002] The working principle of gravity casting equipment is to use the gravity field to make the casting alloy flow naturally into the mold cavity, fill the entire mold cavity and form a casting. Specifically, the molten alloy is poured into the mold, and under the action of gravity, the alloy will fill to the bottom of the mold and solidify to form a metal part.

[0003] Gravity casting equipment has the following advantages: high production efficiency, gravity casting equipment can achieve mass production and improve production efficiency; good casting quality, by precisely controlling the filling and solidification process of liquid metal, it can produce metal parts with high precision, good quality and smooth surface; simple operation, the operation of gravity casting equipment is relatively simple, easy to master and maintain; wide range of application, gravity casting equipment is suitable for the casting of a variety of metal materials, such as aluminum alloy, copper alloy, etc.

[0004] After casting is completed, the material needs to be removed. The existing technology generally sets a hydraulic actuator under the lower mold to push the cooled casting out of the lower mold. However, in practice, the push rod of the hydraulic actuator penetrates the lower mold, which will affect the integrity of the lower mold and thus affect the surface accuracy of the casting. At the same time, when the hydraulic actuator pushes the casting out of the lower mold, it will leave an indentation on the object, thus affecting the surface accuracy of the casting. Summary of the invention

[0005] According to the problems raised in the background technology, the present invention provides a casting device for producing a hydraulic actuator to solve the problems. The present invention will be further explained below.

[0006] The hydraulic cylinder is connected with the hydraulic cylinder to form a vertical cam, and the hydraulic cylinder is connected with the hydraulic cylinder to form a vertical cam, and the hydraulic cylinder is connected with the hydraulic cylinder to form a horizontal cam.

[0007] Preferably, the clamping member and the ejector frame are connected by a connecting rod, the clamping member can slide on the connecting rod, and the clamping member, the ejector frame and the connecting rod form an equal-height linkage whole. In the removal stage, the ejector bar loses its constraint, and the clamping members approach each other under the pulling linkage of the first spring, enter a clamping state to clamp the casting, and simultaneously rise synchronously with the ejector frame to bring out the casting in the lower mold.

[0008] Preferably, the bottom of the ejector frame is connected to a connecting frame, which passes through the movable plate through a suspension rod, and a clamp is provided at the end of the suspension rod passing through the movable plate; the bottom of the swivel is connected to a spring sleeve column, which passes through the connecting frame and is provided with a second spring, which is compressed and abuts between the swivel and the connecting frame and is always in a compressed state. By utilizing the characteristic that the power output direction of the hydraulic cylinder is consistent with the casting removal direction, the casting can be removed in linkage without introducing an independent power source.

[0009] Preferably, a guide rail and a motor are provided on the base, a receiving rack is slidably provided on the guide rail, a shifting head is connected to the side of the receiving rack, a screw rod is connected to the output of the motor, the screw rod penetrates the receiving rack and is threadedly matched with the receiving rack; a shifting rod is pivotally connected to the ejection rack on a side different from the hopper. The receiving rack is driven by the motor to move, and the clamping parts are pried open by the action of the shifting rod, so that the released clamped casting falls on the receiving rack just to take out the casting.

[0010] Beneficial effects: Compared with the prior art, the casting device of the present invention is operated by mechanical connection and linkage, can work stably under the high temperature environment of the casting process, and has only two independent power sources, the hydraulic cylinder and the motor. By reserving a snap fit with the clamping part on the casting during the rotation stage, it saves materials while ensuring the clamping effect and avoiding the problem of affecting the surface accuracy of the casting due to direct clamping on the casting. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0012] Figure 2 It is a schematic diagram of the three-dimensional structure of the swivel, hydraulic cylinder, upper mold and lower mold of the present invention.

[0013] Figure 3 It is a sectional view of the three-dimensional structure of the clamping member, ejection frame and other components of the present invention.

[0014] Figure 4 It is another three-dimensional structural cross-sectional view of the clamping member, ejection frame and other components of the present invention.

[0015] Figure 5 It is a schematic diagram of the three-dimensional structure of the material receiving rack, motor, screw rod and other components of the present invention.

[0016] Figure 6It is a structural schematic diagram of the functions of the moving part and the receiving frame of the present invention.

[0017] Figure 7 It is a schematic diagram of the three-dimensional structure of the material receiving rack and the tray of the present invention.

[0018] The marks in the accompanying drawings are: base 1, swivel 2, lower mold 3, hopper 301, runner 302, hydraulic cylinder 4, movable plate 5, upper mold 6, clamping part 7, sliding column 701, ejector frame 8, platform boss 801, linkage part 9, slide groove 901, ejector rod 10, first spring 11, block 12, connecting rod 13, connecting frame 14, suspension rod 15, clamping part 151, spring sleeve column 16, second spring 17, guide rail 18, motor 19, material receiving frame 20, screw 21, lever 22, reset torsion spring 23, tray 24, lever head 25. DETAILED DESCRIPTION

[0019] Next, combine with Figure 1-7 A specific embodiment of the present invention is described in detail.

[0020] Reference Figure 1-2 A casting device for producing hydraulic actuators includes a base 1 as a bearing body, a swivel 2 is provided on the base 1, and the swivel 2 is pivotally connected to the base 1 through a shaft. The shaft is located above the base. The swivel 2 rotates around the shaft as the center of rotation under the drive of a driving device. The driving device is a prior art and is not described in this embodiment.

[0021] The casting device of the present invention is a gravity casting device, and the range of the forced rotation of the swivel is 0-90°. In the initial state, that is, before pouring, the bottom of the swivel 2 just contacts the base 1. During pouring, the swivel is forced to rotate 90°, and the liquid metal in the hopper 301 is poured into the mold cavity after the upper and lower molds are closed under the action of its own weight, thereby completing the casting of the casting.

[0022] The swivel 2 is fixed with a lower mold 3 and a hydraulic cylinder 4. The output of the hydraulic cylinder 4 is fixedly connected to a moving plate 5. The moving plate 5 is fixed with an upper mold 6. The upper mold 6 moves with the moving plate 5 to perform a lifting action under the action of the hydraulic cylinder 4. When it moves downward to be pressed against the lower mold 3, the mold closing operation is completed, and a mold cavity for pouring castings is formed in the upper and lower molds. The lower mold 3 is provided with a hopper 301 connected to the mold cavity for containing liquid metal. When containing liquid metal, it is in a horizontal state. When the swivel is forced to rotate 90°, the hopper will be in a vertical state, and the liquid metal contained therein will enter the mold cavity through the flow channel 302 at the connection between the hopper 301 and the mold cavity under its own weight.

[0023] As described in the background technology, after the casting is completed, the casting in the lower mold 3 needs to be taken out. This embodiment abandons the prior art solution of using a hydraulic actuator to eject the casting from the lower mold. Considering that in practice, the molten metal contained in the hopper 301 for casting the target casting is excessive, in order to ensure that the molten metal can fill the mold cavity, it will be cooled at the flow channel 302 to form an excess part that is integrated with the casting, which needs to be cut off in the subsequent process. This embodiment is intended to use this excess part as a clamping part and clamp it vertically upwards through a clamping assembly to take it out, so that the wear caused by clamping the excess part is cut off in the subsequent process and has no effect on the casting.

[0024] Reference Figure 2-4 The specific scheme is as follows: the lower mold 3 is provided with a symmetrically movable clamping member 7 at the flow channel 302, and the clamping member 7 can slide synchronously toward or away from the flow channel, and can be lifted up to separate from the flow channel to remove the clamped casting from the lower mold 3. The flow channel 302 is also provided with an ejector frame 8, and the ejector frame 8 can be lifted up to eject the solidified casting from the lower mold; a sliding column 701 is provided at the bottom of the clamping member 7, and a linkage member 9 is provided between the symmetrical clamping members 7. A symmetrical slide groove 901 is provided on the linking member 9, and the slide column 701 is arranged in the slide groove 901. A push rod 10 is fixedly connected to the linking member 9, and a convex 801 is fixedly provided on the ejection frame 8. The push rod 10 passes through this convex 801, and a first spring 11 is provided between the linking member 9 and the bearing convex 801 and is sleeved outside the push rod 10. The first spring 11 is welded or preferably hooked and fixedly connected to the linking member 9 and the bearing convex 801, and is always in a tensile deformation state.

[0025] When the ejector rod 10 is constrained, the first spring 11 is in a tensile deformation state, and the slide column 701 is arranged in a position in the slide groove 901 away from the ejector rod 10; when the ejector rod 10 loses its constraint, based on the premise that the ejector frame 8 is in a fixed position when the symmetrical clamping member 7 is active, the first spring 11 pulls the linkage member 9 downward under the elastic force generated by the contraction deformation, and the symmetrical clamping members 7 move toward each other through the cooperation of the slide groove 901 and the slide column 701, thereby achieving the purpose of clamping the casting. It should be noted that the first spring 11 clamps the casting by contraction, but the first spring 11 is still in a tensile deformation state in the clamping state, that is, the first spring mentioned above is always in a tensile deformation state.

[0026] In the present invention, the sliding of the slide column 701 in the slide groove 901 corresponds to the movement stroke of the clamping member 7. During the pouring process, the excess molten metal will form an excess part for clamping and subsequent process removal at the runner. In order to reserve space for the sliding of the clamping member 7 at the runner, the clamping member 7 needs to be moved to the runner 302 before the molten metal solidifies. This embodiment adopts the following technical solution: a stop block 12 is fixed on the base 1, and the ejector rod 10 is pressed downward against the stop block 12. The interval between the stop block 12 and the ejector frame 8 is sufficient to prevent the stop block 12 from colliding during the rotation of the swivel 2.

[0027] The power source for driving the clamping member 7 to move in the present invention comes from the rotation of the swivel 2, and does not rely on an independently set power source. The specific actions are as follows: in the initial state, the push rod 10 abuts against the abutment block 12, and the molten metal is loaded into the hopper 301 of the horizontal lower mold 3. Thereafter, the swivel 2 gradually rotates 90° to a vertical state. During the rotation, the molten metal in the hopper 301 enters the mold cavity through the flow channel 302 under its own weight. At the same time, the push rod 10 no longer abuts against the abutment block 12 after the rotation action. After the push rod 10 loses its constraint, the clamping members 7 approach each other under the pulling linkage of the first spring 11 to achieve a clamping state; after a period of time, that is, after the molten metal at the flow channel 302 solidifies, the swivel 2 rotates and resets. During the rotation and reset process, the push rod 10 contacts the abutment block 12 after the rotation action, and then gradually pushes the push rod 10 to stretch the first spring 11, and the linkage clamping members 7 move away from each other and reset, and the push rod 10 returns to the constrained state, completing the action of the rotation stage.

[0028] It can be seen that during the first rotation stage, the molten metal has not yet solidified, and the clamping member 7 can be moved to the runner. During the casting process, the runner 302 solidifies first. The purpose of the rotation stage is to pour the molten metal into the mold cavity while linking the clamping member 7 to move to the runner 302. On the one hand, displacement space for the clamping member 7 is reserved at the runner, and the casting can be clamped thereafter to be taken out of the lower mold 3; on the other hand, after the clamping member 7 is moved to the runner 302, it occupies a certain space, which can reduce the amount of molten metal poured, reduce the amount of molten metal used, and also reduce the workload of subsequent cutting; on another hand, a bayonet adapted to the clamping member 7 can be formed after the molten metal solidifies at the runner, so that the casting has higher stability when clamped subsequently.

[0029] After the rotation stage is completed, the mold will remain in the closed state for a period of time to ensure that the alloy liquid is fully solidified and formed in the mold, and then enter the removal stage. The ejector frame 8 is lifted to eject the solidified casting from the lower mold. The specific plan is as follows: the clamping member 7 and the ejector frame 8 are connected by a connecting rod 13, and the clamping member 7 can slide on the connecting rod 13. The function of the connecting rod 13 is to make the clamping member 7, the ejector frame 8, and the connecting rod 13 form an equal-height linkage whole.

[0030] After the mold is kept in the mold-closing state for a period of time, the hydraulic cylinder 4 moves the movable plate 5 upward, and the upper mold 6 follows the movable plate 5 to separate from the lower mold, completing the mold opening operation. After the ejector frame 8 is lifted, the ejector rod 10 loses its constraint, and the clamping parts 7 approach each other under the pulling linkage of the first spring 11, enter the clamping state to clamp the casting, and simultaneously lift up with the ejector frame 8 to bring out the casting in the lower mold 3.

[0031] In the prior art, the ejector frame 8 is generally lifted up by the drive of a hydraulic device. In this embodiment, based on the existence of the hydraulic cylinder 4 and the fact that the power output direction is consistent with the casting removal direction, the following scheme is adopted to achieve the purpose of removing the casting without introducing an independent hydraulic device: a connecting frame 14 is connected to the bottom of the ejector frame 8, and the connecting frame 14 passes through the movable plate 5 through a suspension rod 15. A clamp 151 is provided at the end of the suspension rod 15 passing through the movable plate 5; a spring sleeve column 16 is connected to the bottom of the swivel 2, and the spring sleeve column 16 passes through the connecting frame 14, and a second spring 17 is provided on the outside. The second spring 17 is compressed and pressed between the swivel 2 and the connecting frame 14, and is always in a compressed state.

[0032] The function of the second spring 17 is to keep the ejector frame 8 always pressed against the runner of the lower mold during the rotation stage. During the removal stage, the hydraulic cylinder 4 moves upward to the first height, during which the upper mold 6 follows the moving plate 5 to separate from the lower mold, and the moving plate 5 just contacts the clamp 151 at the end of the suspension rod 15; then, the hydraulic cylinder 4 continues to move upward to the second height, at which time the moving plate 5 pulls the suspension rod 15 upward through the clamp 151, and at the same time, the connecting frame 14 moves upward, compressing the second spring 17 during this process, and the connecting frame 14 and the clamp 7, the ejector frame 8, and the rod 13, which are linked to form an equal-height linkage, move upward as a whole, so as to achieve the purpose of removing the casting clamped by the clamp 7 from the lower mold.

[0033] Reference Figure 5-6 , the clamping piece 7 clamps the casting and separates it from the lower mold and is located above the lower mold. Thereafter, the casting needs to be removed. The present embodiment adopts the following scheme: a guide rail 18 and a motor 19 away from the swivel 2 are also provided on the base 1, a material receiving rack 20 is slidably provided on the guide rail 18, the output of the motor 19 is connected to a screw rod 21, the screw rod 21 penetrates the material receiving rack 20 and is threadedly matched therewith, and a dial head 25 is connected to the side of the material receiving rack 20; a dial rod 22 is pivotally connected to the ejector frame 8 on a side different from the hopper 301, and a reset torsion spring 23 is also provided at the pivot joint, and the reset torsion spring 23 is respectively connected to the ejector frame 8 and the dial rod 22.

[0034] When the hydraulic cylinder 4 moves upward to the second height and stops, the clamping member 7 clamps the casting and is above the lower mold 3 and stops. Thereafter, the motor 19 starts to drive the screw rod 21 to rotate, and the receiving rack 20 is driven to move through the cooperation of the screw rod 21 and the guiding effect of the guide rail 18; when the receiving rack 20 moves to the bottom of the casting, it is just close to the bottom surface, and the shifting head 25 on its side hits one end of the shifting rod 22 at the same time, forcing the shifting rod 22 to rotate slightly, and the other end of the shifting rod 22 forces the clamping member 7 to move back to release the clamped casting, and the casting just falls on the receiving rack 20 below.

[0035] The lever 22 is below the top surface of the ejector frame 8. Its function is that when the ejector frame 8 is reset to the flow channel 302, the flow channel can be kept closed, and the lever can be below the flow channel. The lever 22 is at a distance from the top surface of the ejector frame 8, and the lever head 25 has a certain length in the vertical direction. Its function is that when the lever head 25 hits the lever 22 to force the clamping clamp 7 to release the clamped casting, and the casting falls on the receiving frame 20 below, the hydraulic cylinder 4 starts to move the moving plate 5 downward, and the clamp 7 moves downward in linkage. The length of the lever head 25 and the distance between the lever 22 and the top surface of the ejector frame 8 make the lever head 25 and the lever 22 continue to act for a period of time to maintain the clamp 7 in a loose state; when the clamp 7 moves down to the point where the lever head 25 is separated from the lever 22, the clamp 7 is below the receiving frame 20 and above the lever head 25. At this time, the motor 19 starts to reset the receiving frame 20 to take out the casting.

[0036] The function of the reset torsion spring 23 is to reset the lever 22 to ensure the certainty of its state.

[0037] Reference Figure 7 A tray 24 is provided on the receiving rack 20, and the tray 24 is made of heat-insulating material. After the receiving rack 20 is reset, the casting can be directly taken away together with the tray. After replacing the tray, the material taking operation of the next casting can be directly started.

[0038] The casting device according to the present invention, except for the motor 19 which is an electronically controlled component, the other components are all high-temperature resistant components, which are operated by mechanical connection and linkage, and can work stably under the high-temperature environment of the casting process. There are only two independent power sources, the hydraulic cylinder and the motor, and the motor is also set away from the mold to avoid the influence of high temperature on the motor.

[0039] The present invention realizes the automatic operation of casting and taking out the casting through the rotation stage and the material taking stage. The overall workflow is as follows:

[0040] Rotation phase;

[0041] (1) The hydraulic cylinder 4 is started to move the movable plate 5 downward, and the upper mold 6 moves downward with the movable plate 5 until it is tightly pressed against the lower mold 3, completing the mold closing operation. The hopper 301 is in a horizontal state, and the molten metal is poured into the hopper 301;

[0042] (2) The swivel 2 rotates under the drive of the driving device, and the rotation range is 0-90°. During the rotation process, the molten metal contained in the hopper 301 will enter the mold cavity through the runner 302 under its own weight; during the rotation process, the push rod 10 is separated from the stop block 12 and loses its restraint, and the first spring 11 contracts and deforms to generate elastic force to pull the linkage member 9 downward. Through the cooperation of the slide groove 901 and the slide column 701, the symmetrical clamping member 7 slides toward each other on the rod 13, and the clamping member 7 moves to the runner 302 before the molten metal solidifies;

[0043] (3) After a period of time, when the molten metal in the flow channel 302 solidifies, the swivel 2 rotates and resets. During the rotation and reset process, the push rod 10 contacts the stop block 12 after the rotation action, and then gradually pushes the push rod 10 to stretch the first spring 11, and the linkage clamping parts 7 move away from each other and reset. The push rod 10 returns to the restrained state, completing the action of the rotation stage.

[0044] Pick-up stage;

[0045] (4) After the mold is kept in the closed state for a period of time, the hydraulic cylinder 4 moves upward to the first height. During this process, the upper mold 6 follows the moving plate 5 to separate from the lower mold 3, completing the mold opening operation. The moving plate 5 just contacts the clamp 151 at the end of the suspension rod 15.

[0046] (5) The hydraulic cylinder 4 continues to move upward to the second height, and the movable plate 5 pulls the suspension rod 15 upward through the clamp 151, and at the same time, the connecting frame 14 moves upward. During this process, the second spring 17 is compressed, and the connecting frame 14 and the clamping member 7, the ejection frame 8, and the rod 13, which are linked to form an equal-height linkage, move upward as a whole; during the process of the equal-height linkage moving upward as a whole, the ejector rod 10 again breaks away from the stop block 12 and loses its constraint, and the first spring 11 links the symmetrical clamping members 7 to slide toward each other on the rod 13 to clamp the casting, thereby achieving the purpose of removing the casting from the lower mold;

[0047] (6) The upper mold is stationary at the second height, and the motor 19 starts to drive the screw rod 21 to rotate, thereby driving the receiving rack 20 to move. When the receiving rack 20 moves to the bottom of the casting, it is just close to the bottom surface. The shifting head 25 hits one end of the shifting rod 22, forcing the shifting rod 22 to rotate slightly. The other end of the shifting rod 22 forces the clamping member 7 to move backwards, releasing the clamped casting, and the casting falls onto the receiving rack 20 below.

[0048] (7) The hydraulic cylinder 4 starts to move downward, and after the shifting head 25 is disengaged from the shifting rod 22, the motor 19 starts to reset the receiving rack 20 to remove the casting, and then the hydraulic cylinder 4 continues to start to reset the clamping member 7.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A casting device for producing a hydraulic actuator, comprising a base (1), a swivel (2) being provided on the base (1), a lower mold (3) and a hydraulic cylinder (4) being fixedly provided on the swivel (2), an output of the hydraulic cylinder (4) being fixedly connected to a movable plate (5), an upper mold (6) being fixed on the movable plate (5); characterized in that: The lower mold (3) is provided with symmetrical clamping members (7) at the flow channel (302), and an ejector frame (8) is provided at the flow channel (302), and the ejector frame (8) can be lifted; a slide column (701) is provided at the bottom of the clamping member (7), a linking member (9) is provided between the symmetrical clamping members (7), and a symmetrical slide groove (901) is provided on the linking member (9), the slide column (701) is arranged in the slide groove (901), and the linking member (9) is fixedly connected to the ejector rod (10 ), a platform protrusion (801) is fixedly provided on the ejection frame (8), and the ejector rod (10) passes through the platform protrusion (801); a first spring (11) is provided between the linking member (9) and the bearing protrusion (801) and is sleeved outside the ejector rod (10), and the first spring (11) is fixedly connected to the linking member (9) and the bearing protrusion (801), and is always in a stretched deformation state; a stop block (12) is fixed on the base (1), and the ejector rod (10) is pressed downward against the stop block (12).

2. The casting device for producing a hydraulic actuator according to claim 1, characterized in that: The clamping member (7) and the ejection frame (8) are connected via a connecting rod (13); the clamping member (7) can slide on the connecting rod (13); the clamping member (7), the ejection frame (8) and the connecting rod (13) form an equal-height linkage whole.

3. The casting device for producing a hydraulic actuator according to claim 2, characterized in that: The bottom of the ejection frame (8) is connected to a connecting frame (14), the connecting frame (14) passes through the movable plate (5) via a suspension rod (15), and a clamp (151) is provided at the end of the suspension rod (15) passing through the movable plate (5); the bottom of the swivel (2) is connected to a spring sleeve column (16), the spring sleeve column (16) passes through the connecting frame (14), and a second spring (17) is provided outside, the second spring (17) is compressed and abuts between the swivel (2) and the connecting frame (14), and is always in a compressed state.

4. The casting device for producing a hydraulic actuator according to claim 1, characterized in that: The base (1) is provided with a guide rail (18) and a motor (19); a material receiving frame (20) is slidably provided on the guide rail (18); a shifting head (25) is connected to the side of the material receiving frame; an output of the motor (19) is connected to a screw rod (21); the screw rod (21) penetrates the material receiving frame (20) and is threadedly engaged with the material receiving frame (20); and a shifting rod (22) is pivotally connected to the ejection frame (8) on a side different from the hopper (301).

5. The casting device for producing a hydraulic actuator according to any one of claims 1 to 4, characterized in that: There is a gap between the stop block (12) and the ejection frame (8), and the gap is sufficient to prevent the swivel (2) from colliding with the stop block (12) during the rotation process.

6. The casting device for producing a hydraulic actuator according to claim 4, characterized in that: A return torsion spring (23) is provided at the pivot joint, and the return torsion spring (23) is respectively connected to the ejection frame (8) and the shifting rod (22).

7. The casting device for producing a hydraulic actuator according to claim 4, characterized in that: The motor (19) is far away from the rotating body (2).

8. The casting device for producing a hydraulic actuator according to claim 6, characterized in that: A tray (24) is provided on the material receiving rack (20), and the tray is made of heat insulating material.

Images