High-sealing low-stress air cylinder aluminum alloy piston casting demolding device

Abstract

The invention discloses a high-sealing low-stress air cylinder aluminum alloy piston casting demolding device and relates to the technical field of aluminum alloy forging, the high-sealing low-stress air cylinder aluminum alloy piston casting demolding device comprises a rack, a casting table and a supporting frame are fixedly installed at the top of the rack, a guide groove is formed in the surface of the casting table, and the supporting frame is fixedly installed on the side of the top of the rack; a stamping frame is fixedly mounted on the outer surface of the supporting frame, and a hydraulic machine is fixedly mounted at the top of the stamping frame. According to the casting demolding device for the high-sealing low-stress air cylinder aluminum alloy piston, when an attaching block moves downwards along with an external connecting plate, an elastic frame moves to the top of a lifting frame and extrudes the lifting frame, the elastic frame is made of a rubber material, and the elastic frame is extruded to deform and is attached to the outer side of the lifting frame; therefore, when the aluminum alloy piston is cast, the positioning sliding frame is supported from the peripheral side, vibration generated when the positioning sliding frame punches downwards is buffered, and the casting bottom die is prevented from deviating due to vibration during casting.

Description

Technical Field

[0001] The present invention relates to the technical field of aluminum alloy forging, and particularly to a casting and demolding device for a high-sealing and low-stress cylinder aluminum alloy piston. Background Technique

[0002] The aluminum piston alloy uses a low-plasticity cast aluminum alloy as the base material, and its composition adds a rare-earth-rich mixed rare-earth element accounting for 0.8 - 1.4% of the alloy amount and trace metal elements such as Sn, Pb, Zn, Cr, and Ti. During the melting process, the rare-earth elements interact with the alloy elements to generate a variety of rare-earth compound strengthening phases, making the alloy structure uniform, the crystal grains refined, the grain boundaries strengthened, and the linear expansion coefficient reduced, thereby significantly improving the strength, hardness, enhancing the volume stability and machining performance. Its tensile strength ≥ 275 N / mm2, hardness HBS95 - 135, and the volume stability of the made piston ≤ 2%D, which is especially suitable for making medium-convex variable-elliptical aluminum alloy pistons with special requirements.

[0003] During the casting process of the cylinder aluminum alloy piston, demolding is a key link. Traditional demolding methods may cause damage to the piston, affecting its sealing performance and dimensional accuracy. At the same time, it may also generate large stresses, resulting in defects such as cracks in the piston during subsequent use. In addition, existing demolding devices may have problems such as low demolding efficiency and complex operation, and cannot meet the requirements of high-efficiency production. Summary of the Invention

[0004] To achieve the above objectives, the present invention is realized through the following technical solutions: A casting and demolding device for a high-sealing and low-stress cylinder aluminum alloy piston, including: a frame, on the top of the frame, a casting table and a support frame are respectively fixedly installed. A guide groove is opened on the surface of the casting table. The support frame is fixedly installed at the side of the top of the frame. A punching frame is fixedly installed on the outer surface of the support frame. A hydraulic press is fixedly installed on the top of the punching frame. A hydraulic rod is movably installed inside the punching frame. The hydraulic rod is fixedly installed at the side of the top of the casting table;

[0005] A punching assembly, the punching assembly is fixedly installed on the outer surface of the hydraulic rod. The punching assembly is erected above the casting table through the hydraulic rod;

[0006] A casting bottom mold, which is adapted to the punching of the punching assembly to cast the aluminum alloy piston. The casting bottom mold is slidably installed in the middle of the top of the casting table through the guide groove. The casting bottom mold is adapted to the punching assembly;

[0007] The clamping assembly is used for anti-deviating positioning of the casting mold. The clamping assembly is fixedly mounted on both sides of the top of the casting table. The clamping assembly and the casting bottom mold are arranged on the same median line. The clamping assembly is arranged on both sides of the outer surface of the casting bottom mold. When casting the aluminum alloy piston of the cylinder, the staff first installs the casting bottom mold on the top of the casting table, and clamps and fixes the casting bottom mold through the clamping assemblies on both sides, so that the casting bottom mold is installed below the stamping assembly. Then the staff places the aluminum alloy material used for casting above the casting bottom mold and starts the hydraulic press, so that the hydraulic press execution end drives the hydraulic rod to run, so that the stamping assembly performs hot pressing on the aluminum alloy material as the hydraulic rod moves downward, so that the aluminum alloy material is cast and formed in the casting bottom mold and the stamping assembly.

[0008] Preferably, the stamping assembly includes a positioning slide, a connecting block is fixedly installed at the bottom of the positioning slide, a hot press plate is fixedly installed at the bottom of the connecting block, a top mold is opened in the middle of the bottom of the hot press plate, external plates are fixedly installed on both sides of the outer surface of the hot press plate, buffers are fixedly installed on both sides of the bottom of the external plates, four buffers are provided, and the four buffers are symmetrically arranged around the hot press plate. The staff starts the hydraulic press, so that the hydraulic press execution end drives the hydraulic rod to operate, so that the positioning slide drives the hot press plate, the top mold and the buffer to move downward with the hydraulic rod to cooperate with the casting bottom mold to perform hot press casting on the aluminum alloy material, and when the top mold moves downward, the aluminum alloy material is squeezed to squeeze the demolding pressing piece, so that the demolding pressing piece is deformed by force and shrinks downward, and after the casting is completed, the positioning slide moves upward with the hydraulic rod, and at this time, the demolding pressing piece is lifted upward to demold the aluminum alloy piston.

[0009] Preferably, the positioning slide is sleeved and installed on the outer surface of the hydraulic rod, the positioning slide is movably installed under the stamping frame through the hydraulic rod, and the buffer is extrusion-fitted with the casting bottom mold.

[0010] Preferably, the buffer comprises a fitting block, a connecting block is fixedly mounted on the bottom of the fitting block, a bending frame is fixedly mounted on the bottom of the connecting block, and a spring frame is fixedly mounted on the bottom of the bending frame. When the external plate moves downward, the fitting block moves to the top of the lifting frame and is squeezed with the lifting frame. The spring frame is made of rubber material, and is deformed by the squeezing and fits on the outside of the lifting frame, so as to support the positioning slide from the circumferential side during the casting of the aluminum alloy piston, and to buffer the vibration of the positioning slide when it is stamped downward, so as to prevent the bottom mold from being offset by the vibration during the casting.

[0011] Preferably, the fitting block is fixedly mounted on the outer surface of the external plate, the connecting block is fixedly mounted on the bottom of the external plate, and the spring holder is extrusion-fitted with the casting bottom mold.

[0012] Preferably, the clamping assembly includes mounting seats. There are two mounting seats. Hydraulic cylinders are fixedly installed on the outer surfaces of the two mounting seats. A pushing rod is fixedly installed on the surface of the hydraulic cylinder. The pushing rod penetrates through the mounting seat and extends to its outside. A clamping block is fixedly installed on the surface of the pushing rod. A positioning block is fixedly installed on the outer surface of the clamping block. There are two groups of positioning blocks. A protective pad is fixedly installed between the opposite surfaces of the two groups of positioning blocks. Clamping pieces are fixedly installed on the outer surfaces of the positioning blocks. After the staff installs the casting bottom mold above the casting table, the hydraulic cylinders are started so that the execution ends of the hydraulic cylinders drive the pushing rods to move from both sides towards the casting bottom mold. At this time, the clamping pieces and the protective pad move to the surfaces on both sides of the casting bottom mold along with the pushing rods. The protective pad and the clamping pieces squeeze the casting bottom mold and cause deformation to fit on the surface of the casting bottom mold, so as to perform flexible clamping on the casting bottom mold. It can be adjusted according to the size and position of the mold to ensure that the mold can be accurately placed at the designated position and prevent the casting bottom mold from sliding during the casting and demolding process.

[0013] Preferably, the mounting seats are fixedly installed at the side of the top of the casting table. The clamping pieces and the protective pad are adapted to be squeezed with the casting bottom mold. The clamping pieces and the protective pad are both made of flexible materials.

[0014] Preferably, the casting bottom mold includes a sliding seat. A lifting frame is fixedly installed on the top of the sliding seat. A forging groove is fixedly installed in the middle of the top of the lifting frame. A sealing cavity is fixedly installed inside the forging groove. An extrusion pad is fixedly installed on the inner wall of the sealing cavity. A demolding pressing part is fixedly installed at the axis of the sealing cavity. A hydraulic telescopic rod is movably installed at the bottom of the demolding pressing part. A stabilizing support frame is fixedly installed on the outer surface of the hydraulic telescopic rod. The bottom of the hydraulic telescopic rod and the stabilizing support frame are fixedly installed with a round seat. The round seat is fixedly installed inside the sliding seat. The staff places the casting aluminum alloy material in the sealing cavity, and then the staff starts the hydraulic press, so that the execution end of the hydraulic press drives the hydraulic rod to operate, so that the positioning sliding frame drives the hot pressing plate and the top mold to descend to the surface of the forging groove along with the hydraulic rod, and the aluminum alloy material and the demolding pressing part are stamped by the hot pressing plate and the top mold. At this time, the hot pressing plate is adapted to the sealing cavity and seals the sealing cavity, so as to facilitate the casting and forming of the aluminum alloy piston in the sealing cavity.

[0015] Preferably, the sliding seat is slidably installed on the top of the casting table. The sliding seat and the lifting frame are both frictionally adapted to the clamping pieces and the protective pad. The extrusion pad, the demolding pressing part and the top mold are adapted to be squeezed.

[0016] Preferably, the demolding pressing part includes a sleeve shell, a circular arc hollow cover is fixedly installed on the top of the sleeve shell, a limiting ring is fixedly installed on the bottom of the sleeve shell, an inner gasket ring is fixedly installed on the inner wall of the sleeve shell, tilting rings are fixedly installed on both sides of the outer surface of the inner gasket ring, the tilting ring is fixedly connected to the inner wall of the sleeve shell, an inner connecting cavity is fixedly installed inside the tilting ring, the inner connecting cavity is fixedly connected to the limiting ring, an inner push pad is movably installed inside the inner connecting cavity, and the inner push pad is fixedly installed on the top of the hydraulic telescopic rod. When the top die is stamping the aluminum alloy material and the circular arc hollow cover, the aluminum alloy material is adapted to the mold installed in the sealed cavity and is formed, and the circular arc hollow cover is squeezed by the mold, so that the circular arc hollow cover is forced to sink downward and shrink, and the inner cavity is squeezed when the circular arc hollow cover sinks inward and shrinks. The inner pad ring arranged on the outside of the inner cavity improves the balance of the circular arc hollow cover. After the mold casting is completed, the positioning slide is lifted upward, and the circular arc hollow cover rebounds upward after losing pressure and collides with the bottom of the aluminum alloy piston. The aluminum alloy piston is pretreated before demolding. At this time, the aluminum alloy piston is vibrated to reduce the adhesion between the piston and the mold. At this time, the hydraulic telescopic rod drives the inner push pad to lift upward, so that the circular arc hollow cover resets the protrusion to demold the aluminum alloy piston, thereby avoiding damage to the piston during demolding.

[0017] The present invention provides a high-seal and low-stress cylinder aluminum alloy piston casting demoulding device. It has the following beneficial effects:

[0018] 1. The high-seal and low-stress cylinder aluminum alloy piston casting demoulding device is configured such that after the staff installs the casting bottom mold on the top of the casting table, the hydraulic cylinder is started so that the hydraulic cylinder execution end drives the pushing rod to move from both sides toward the casting bottom mold. At this time, the clamping piece and the protective pad move to the surfaces on both sides of the casting bottom mold along with the pushing rod. The protective pad and the clamping piece squeeze the casting bottom mold and deform to fit the surface of the casting bottom mold, so as to flexibly clamp the casting bottom mold and adjust it according to the size and position of the mold to ensure that the mold can be accurately placed in the specified position and prevent the casting bottom mold from sliding during the casting demoulding process.

[0019] 2. The high-seal and low-stress cylinder aluminum alloy piston casting demoulding device is started by a staff member, so that the hydraulic press actuator drives the hydraulic rod to run, so that the positioning slide drives the hot pressing plate, the top mold and the buffer part downward with the hydraulic rod to cooperate with the casting bottom mold to perform hot pressure casting on the aluminum alloy material. When the top mold moves downward, the demoulding pressing piece is squeezed by the aluminum alloy material, so that the demoulding pressing piece is deformed by the force and shrinks downward. After the casting is completed, the positioning slide moves upward with the hydraulic rod, and the demoulding pressing piece is lifted upward to demould the aluminum alloy piston.

[0020] 3. The high-sealing and low-stress cylinder aluminum alloy piston casting demolding device, through the fitting block, as the external plate moves downward, the spring frame moves to the top of the lifting frame and is squeezed with the lifting frame. The spring frame is set to a rubber material, and the spring frame is deformed by the extrusion and fits to the outside of the lifting frame, so as to support the positioning slide from the circumferential side during the casting of the aluminum alloy piston, and cushion the vibration of the positioning slide when the positioning slide is stamped downward, thereby preventing the casting bottom mold from being offset due to vibration during casting.

[0021] 4. The high-sealing and low-stress cylinder aluminum alloy piston casting demolding device is configured such that the staff places the casting aluminum alloy material in the sealing cavity, and then starts the hydraulic press, so that the hydraulic press actuator drives the hydraulic rod to run, so that the positioning slide is driven by the hydraulic rod to drive the hot pressing plate and the top die to move down to the surface of the forging groove, and the aluminum alloy material and the demolding pressing piece are punched through the hot pressing plate and the top die. At this time, the hot pressing plate is relatively adapted to the sealing cavity and seals the sealing cavity, so as to facilitate the casting of the aluminum alloy piston in the sealing cavity.

[0022] 5. The high-sealing and low-stress cylinder aluminum alloy piston casting demolding device, when the aluminum alloy material and the arc hollow cover are stamped by the top die, the aluminum alloy material is adapted to the mold installed in the sealing cavity and formed, and the arc hollow cover is squeezed by the mold, so that the arc hollow cover is forced to sink downward and shrink, and the inner cavity is squeezed when the arc hollow cover sinks inward and shrinks. The inner pad ring arranged on the outer side of the inner cavity improves the balance of the arc hollow cover. After the mold casting is completed, the positioning slide is lifted upward, and the arc hollow cover rebounds upward after losing pressure and collides with the bottom of the aluminum alloy piston. The aluminum alloy piston is pretreated before demolding. At this time, the aluminum alloy piston is vibrated to reduce the adhesion between the piston and the mold. At this time, the hydraulic telescopic rod drives the inner push pad to lift upward, so that the arc hollow cover resets the protrusion to demold the aluminum alloy piston, thereby avoiding damage to the piston during demolding. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the external structure of a high-sealing and low-stress cylinder aluminum alloy piston casting demoulding device of the present invention;

[0024] Figure 2 This is a schematic diagram of the external structure of a high-sealing and low-stress cylinder aluminum alloy piston casting demoulding device of the present invention from another angle;

[0025] Figure 3 It is a schematic diagram of the connection structure between the stamping assembly and the casting table of the present invention;

[0026] Figure 4 It is a structural schematic diagram of the stamping assembly of the present invention;

[0027] Figure 5 It is an enlarged structural schematic diagram of the buffer member of the present invention;

[0028] Figure 6 This is a schematic diagram of the connection structure of the clamping component, casting bottom mold and casting table of the present invention;

[0029] Figure 7 This is a schematic diagram of the structure of the clamping component of the present invention;

[0030] Figure 8 This is a schematic diagram of the connection structure of the casting bottom mold and casting table of the present invention;

[0031] Figure 9 This is a schematic diagram of the structure of the casting bottom mold of the present invention;

[0032] Figure 10 This is a schematic diagram of the structure of the demolding pressing part of the present invention.

[0033] Figure 11 This is an enlarged schematic diagram of the cross-section of the demolding pressing part of the present invention.

[0034] In the figure: 1, hydraulic press; 2, stamping frame; 3, hydraulic rod; 4, stamping component; 41, positioning sliding frame; 42, external connecting plate; 43, connecting block; 44, buffer component; 441, fitting block; 442, connecting clamping block; 443, bending frame; 444, elastic frame; 45, hot pressing plate; 46, top mold; 5, guide groove; 6, clamping component; 61, hydraulic cylinder; 62, pushing rod; 63, mounting seat; 64, positioning block; 65, clamping block; 66, protective pad; 67, clamping piece; 7, casting table; 8, casting bottom mold; 81, sliding seat; 82, forging groove; 83, demolding pressing part; 831, arc-shaped hollow cover; 832, sleeve; 833, limiting ring; 834, inner attaching cushion ring; 835, inner pushing cushion; 836, inner connecting cavity; 837, inclined ring; 84, lifting frame; 85, extrusion pad; 86, sealing cavity; 87, hydraulic telescopic rod; 88, round seat; 89, stable support frame; 9, frame; 10, support frame. Specific embodiments

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0036] The first embodiment is as Figures 1 to 11As shown in the figure, the present invention provides a technical solution: a high-sealing and low-stress cylinder aluminum alloy piston casting and demolding device, including: a frame 9, a casting table 7 and a support frame 10 are fixedly installed on the top of the frame 9 respectively. A guide groove 5 is opened on the surface of the casting table 7. The support frame 10 is fixedly installed at the side of the top of the frame 9. A stamping frame 2 is fixedly installed on the outer surface of the support frame 10. A hydraulic press 1 is fixedly installed on the top of the stamping frame 2. A hydraulic rod 3 is movably installed inside the stamping frame 2. The hydraulic rod 3 is fixedly installed at the side of the top of the casting table 7;

[0037] A stamping assembly 4, the stamping assembly 4 is fixedly installed on the outer surface of the hydraulic rod 3, and the stamping assembly 4 is erected above the casting table 7 through the hydraulic rod 3;

[0038] A casting bottom mold 8, the casting bottom mold 8 is stamping-fitted with the stamping assembly 4 to cast the aluminum alloy piston. The casting bottom mold 8 is slidably installed at the middle of the top of the casting table 7 through the guide groove 5, and the casting bottom mold 8 is adapted to the stamping assembly 4;

[0039] The casting bottom mold 8 includes a sliding seat 81. A lifting frame 84 is fixedly installed on the top of the sliding seat 81. A forging groove 82 is fixedly installed at the middle of the top of the lifting frame 84. A sealing cavity 86 is fixedly installed inside the forging groove 82. An extrusion pad 85 is fixedly installed on the inner wall of the sealing cavity 86. A demolding press piece 83 is fixedly installed at the axis of the sealing cavity 86. A hydraulic telescopic rod 87 is movably installed at the bottom of the demolding press piece 83. A stabilizing support frame 89 is fixedly installed on the outer surface of the hydraulic telescopic rod 87. A round seat 88 is fixedly installed at the bottom of the hydraulic telescopic rod 87 and the stabilizing support frame 89. The round seat 88 is fixedly installed inside the sliding seat 81. The staff places the casting aluminum alloy material in the sealing cavity 86, and then the staff starts the hydraulic press 1, so that the execution end of the hydraulic press 1 drives the hydraulic rod 3 to operate, so that the positioning sliding frame 41 drives the hot pressing plate 45 and the top mold 46 to descend to the surface of the forging groove 82 along with the hydraulic rod 3, and the aluminum alloy material and the demolding press piece 83 are stamped by the hot pressing plate 45 and the top mold 46. At this time, the hot pressing plate 45 is relatively adapted to the sealing cavity 86 and seals the sealing cavity 86, so as to facilitate the casting and forming of the aluminum alloy piston in the sealing cavity 86.

[0040] The sliding seat 81 is slidably installed on the top of the casting table 7. The sliding seat 81 and the lifting frame 84 are both frictionally adapted to the clamping piece 67 and the protective pad 66. The extrusion pad 85, the demolding press piece 83 and the top mold 46 are extrusion-adapted.

[0041] The clamping assembly 6 is used for anti-offset positioning of the casting mold. The clamping assembly 6 is fixedly installed on both sides of the top of the casting table 7. The clamping assembly 6 and the casting bottom mold 8 are arranged on the same median line, and the clamping assembly 6 is arranged on both sides of the outer surface of the casting bottom mold 8. When casting the aluminum alloy piston, the staff first installs the casting bottom mold 8 on the top of the casting table 7, and clamps and fixes the casting bottom mold 8 through the clamping assemblies 6 on both sides, so that the casting bottom mold 8 is installed below the stamping assembly 4. Then, the staff places the aluminum alloy material used for casting above the casting bottom mold 8 and starts the hydraulic press 1, so that the execution end of the hydraulic press 1 drives the hydraulic rod 3 to operate, so that the stamping assembly 4 moves downward along with the hydraulic rod 3 to hot-press the aluminum alloy material, so that the aluminum alloy material is cast and formed between the casting bottom mold 8 and the stamping assembly 4.

[0042] The clamping assembly 6 includes mounting seats 63. There are two mounting seats 63. Hydraulic cylinders 61 are fixedly installed on the outer surfaces of both mounting seats 63. A pushing rod 62 is fixedly installed on the surface of the hydraulic cylinder 61. The pushing rod 62 penetrates through the mounting seat 63 and extends to its outside. A clamping block 65 is fixedly installed on the surface of the pushing rod 62. A positioning block 64 is fixedly installed on the outer surface of the clamping block 65. There are two groups of positioning blocks 64. A protective pad 66 is fixedly installed between the opposite surfaces of the two groups of positioning blocks 64. Clamping pieces 67 are fixedly installed on the outer surfaces of the positioning blocks 64. After the staff installs the casting bottom mold 8 above the casting table 7, the hydraulic cylinder 61 is started so that the execution end of the hydraulic cylinder 61 drives the pushing rod 62 to move from both sides towards the casting bottom mold 8. At this time, the clamping pieces 67 and the protective pad 66 move to the surfaces on both sides of the casting bottom mold 8 along with the pushing rod 62. The protective pad 66 and the clamping pieces 67 squeeze the casting bottom mold 8 and deform to fit on the surface of the casting bottom mold 8, so as to perform flexible clamping on the casting bottom mold 8 and can be adjusted according to the size and position of the mold, ensuring that the mold can be accurately placed at the designated position and preventing the casting bottom mold 8 from sliding during the casting and demolding process.

[0043] The mounting seats 63 are fixedly installed at the side edges of the top of the casting table 7. The clamping pieces 67 and the protective pad 66 are adapted to the casting bottom mold 8 by extrusion. The clamping pieces 67 and the protective pad 66 are both made of flexible materials.

[0044] The stamping assembly 4 includes a positioning slide 41, a connecting block 43 is fixedly installed at the bottom of the positioning slide 41, a hot pressing plate 45 is fixedly installed at the bottom of the connecting block 43, a top mold 46 is opened in the middle of the bottom of the hot pressing plate 45, external plates 42 are fixedly installed on both sides of the outer surface of the hot pressing plate 45, buffer members 44 are fixedly installed on both sides of the bottom of the external plates 42, and four buffer members 44 are provided, and the four buffer members 44 are symmetrically arranged with the hot pressing plate 45 as the center. The staff starts the hydraulic press 1, so that the execution end of the hydraulic press 1 drives the hydraulic rod 3 to run, so that the positioning slide 41 drives the hot pressing plate 45, the top mold 46 and the buffer member 44 downward with the hydraulic rod 3 to cooperate with the casting bottom mold 8 to perform hot pressure casting on the aluminum alloy material. When the top mold 46 moves downward, the demolding pressing piece 83 is squeezed by the aluminum alloy material, so that the demolding pressing piece 83 is deformed by the force and shrinks downward. After the casting is completed, the positioning slide 41 moves upward with the hydraulic rod 3. At this time, the demolding pressing piece 83 is lifted upward to demold the aluminum alloy piston.

[0045] The positioning slide 41 is sleeved and installed on the outer surface of the hydraulic rod 3 . The positioning slide 41 is movably installed below the punching frame 2 through the hydraulic rod 3 . The buffer member 44 is extrusion-fitted with the casting bottom mold 8 .

[0046] The second embodiment is based on the first embodiment. Figures 4 to 5 As shown, the buffer member 44 includes a fitting block 441, a connecting block 442 is fixedly installed at the bottom of the fitting block 441, a bending frame 443 is fixedly installed at the bottom of the connecting block 442, and a spring frame 444 is fixedly installed at the bottom of the bending frame 443. When the fitting block 441 moves downward along with the external plate 42, the spring frame 444 moves to the top of the lifting frame 84 and is squeezed with the lifting frame 84. The spring frame 444 is set to a rubber material, and the spring frame 444 is squeezed to produce deformation and fit to the outside of the lifting frame 84, so as to support the positioning slide 41 from the circumferential side when the aluminum alloy piston is cast, and to buffer the vibration of the positioning slide 41 when it is stamped downward, so as to prevent the casting bottom mold 8 from being offset due to vibration during casting.

[0047] The fitting block 441 is fixedly mounted on the outer surface of the external plate 42 , the connecting block 442 is fixedly mounted on the bottom of the external plate 42 , and the spring holder 444 is extruded and adapted to the casting bottom mold 8 .

[0048] The third embodiment is based on the first and second embodiments. Figures 9 to 11As shown, the demolding pressing part 83 includes a sleeve shell 832, a circular arc hollow cover 831 is fixedly installed on the top of the sleeve shell 832, a limiting ring 833 is fixedly installed on the bottom of the sleeve shell 832, an inner gasket ring 834 is fixedly installed on the inner wall of the sleeve shell 832, and tilting rings 837 are fixedly installed on both sides of the outer surface of the inner gasket ring 834, the tilting ring 837 is fixedly connected to the inner wall of the sleeve shell 832, an inner connecting cavity 836 is fixedly installed inside the tilting ring 837, the inner connecting cavity 836 is fixedly connected to the limiting ring 833, an inner push pad 835 is movably installed inside the inner connecting cavity 836, and the inner push pad 835 is fixedly installed on the top of the hydraulic telescopic rod 87. When the top die 46 punches the aluminum alloy material and the circular arc hollow cover 831, the aluminum alloy material is adapted to the die installed in the sealing cavity 86, and the circular arc hollow cover 831 is squeezed by the die, so that the circular arc hollow cover 831 is forced to sink downward and shrink, and the circular arc hollow cover 831 is squeezed when it sinks inward and shrinks. The inner pad ring 834 arranged on the outside of the inner cavity 836 improves the balance of the circular arc hollow cover 831. After the mold casting is completed, the positioning slide 41 is lifted upward, and the circular arc hollow cover 831 rebounds upward after losing pressure and collides with the bottom of the aluminum alloy piston. The aluminum alloy piston is pretreated before demolding. At this time, the aluminum alloy piston is vibrated to reduce the adhesion between the piston and the mold. At this time, the hydraulic telescopic rod 87 drives the inner push pad 835 to lift upward, so that the circular arc hollow cover 831 is reset to the protrusion, thereby demolding the aluminum alloy piston to avoid damage to the piston during demolding.

[0049] During use, when casting the cylinder aluminum alloy piston, the staff first installs the casting bottom mold 8 on the top of the casting table 7, and clamps and fixes the casting bottom mold 8 through the clamping assemblies 6 on both sides, so that the casting bottom mold 8 is installed below the stamping assembly 4. Then the staff places the aluminum alloy material used for casting on the top of the casting bottom mold 8 and starts the hydraulic press 1, so that the execution end of the hydraulic press 1 drives the hydraulic rod 3 to run, so that the stamping assembly 4 hot presses the aluminum alloy material as the hydraulic rod 3 descends, so that the aluminum alloy material is cast and formed in the casting bottom mold 8 and the stamping assembly 4.

[0050] After the staff installs the casting bottom mold 8 above the casting table 7, the hydraulic cylinder 61 is started so that the actuator end of the hydraulic cylinder 61 drives the pushing rod 62 to move from both sides toward the casting bottom mold 8. At this time, the clamping piece 67 and the protective pad 66 move to the surfaces on both sides of the casting bottom mold 8 with the pushing rod 62. The protective pad 66 and the clamping piece 67 squeeze the casting bottom mold 8 and deform to fit the surface of the casting bottom mold 8, so as to flexibly clamp the casting bottom mold 8 and adjust it according to the size and position of the mold to ensure that the mold can be accurately placed in the specified position and prevent the casting bottom mold 8 from sliding during the casting demolding process.

[0051] The staff starts the hydraulic press 1, so that the execution end of the hydraulic press 1 drives the hydraulic rod 3 to run, so that the positioning slide 41 drives the hot pressing plate 45, the top mold 46 and the buffer member 44 downward with the hydraulic rod 3 to cooperate with the casting bottom mold 8 to perform hot pressure casting on the aluminum alloy material. When the top mold 46 moves downward, the demolding pressing piece 83 is squeezed by the aluminum alloy material, so that the demolding pressing piece 83 is deformed by the force and shrinks downward. After the casting is completed, the positioning slide 41 moves upward with the hydraulic rod 3. At this time, the demolding pressing piece 83 is lifted upward to demold the aluminum alloy piston.

[0052] As the external plate 42 moves downward, the fitting block 441 and the spring frame 444 move to the top of the lifting frame 84 and are squeezed with the lifting frame 84. The spring frame 444 is set to a rubber material. The spring frame 444 is deformed by the squeeze and fits to the outside of the lifting frame 84, thereby supporting the positioning slide 41 from the circumferential side when the aluminum alloy piston is cast, and cushioning the vibration of the positioning slide 41 when it is stamped downward, thereby preventing the casting bottom mold 8 from being offset due to the vibration during casting.

[0053] The staff places the aluminum alloy material for casting in the sealed cavity 86, and then starts the hydraulic press 1, so that the actuator end of the hydraulic press 1 drives the hydraulic rod 3 to run, so that the positioning slide 41 moves down to the surface of the forging groove 82 along with the hot pressing plate 45 and the top die 46 driven by the hydraulic rod 3, and the aluminum alloy material and the demolding pressing piece 83 are stamped by the hot pressing plate 45 and the top die 46. At this time, the hot pressing plate 45 is relatively adapted to the sealed cavity 86 and the sealed cavity 86 is sealed to facilitate the casting of the aluminum alloy piston in the sealed cavity 86.

[0054] When the top die 46 punches the aluminum alloy material and the circular arc hollow cover 831, the aluminum alloy material is adapted to the die installed in the sealing cavity 86, and the circular arc hollow cover 831 is squeezed by the die, so that the circular arc hollow cover 831 is forced to sink downward and shrink, and the circular arc hollow cover 831 is squeezed when it sinks inward and shrinks. The inner pad ring 834 arranged on the outside of the inner cavity 836 improves the balance of the circular arc hollow cover 831. After the mold casting is completed, the positioning slide 41 is lifted upward, and the circular arc hollow cover 831 rebounds upward after losing pressure and collides with the bottom of the aluminum alloy piston. The aluminum alloy piston is pretreated before demolding. At this time, the aluminum alloy piston is vibrated to reduce the adhesion between the piston and the mold. At this time, the hydraulic telescopic rod 87 drives the inner push pad 835 to lift upward, so that the circular arc hollow cover 831 is reset to the protrusion, thereby demolding the aluminum alloy piston to avoid damage to the piston during demolding.

[0055] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variation thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising said element.

[0056] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-sealing and low-stress cylinder aluminum alloy piston casting demoulding device, characterized in that Comprising: A frame (9), on the top of which a casting table (7) and a support frame (10) are respectively and fixedly installed. A guide groove (5) is formed on the surface of the casting table (7). The support frame (10) is fixedly installed at the side of the top of the frame (9). A stamping frame (2) is fixedly installed on the outer surface of the support frame (10). A hydraulic press (1) is fixedly installed on the top of the stamping frame (2). A hydraulic rod (3) is movably installed inside the stamping frame (2). The hydraulic rod (3) is fixedly installed at the side of the top of the casting table (7). A stamping component (4), which is fixedly installed on the outer surface of the hydraulic rod (3). The stamping component (4) is erected above the casting table (7) through the hydraulic rod (3). A casting bottom mold (8), which is adapted to the stamping of the stamping component (4) to cast an aluminum alloy piston. The casting bottom mold (8) is slidably installed at the middle of the top of the casting table (7) through the guide groove (5). The casting bottom mold (8) is adapted to the stamping component (4). A clamping component (6), which is used for anti-offset positioning of the casting mold. The clamping component (6) is fixedly installed on both sides of the top of the casting table (7). The clamping component (6) and the casting bottom mold (8) are arranged on the same median line. The clamping component (6) is arranged on both sides of the outer surface of the casting bottom mold (8).

2. The high-sealing and low-stress cylinder aluminum alloy piston casting demoulding device according to claim 1, wherein: The stamping component (4) includes a positioning slide frame (41). A connecting block (43) is fixedly installed at the bottom of the positioning slide frame (41). A hot pressing plate (45) is fixedly installed at the bottom of the connecting block (43). A top mold (46) is formed at the middle of the bottom of the hot pressing plate (45). Outer connecting plates (42) are fixedly installed on both sides of the outer surface of the hot pressing plate (45). Buffer members (44) are fixedly installed on both sides of the bottom of the outer connecting plates (42). There are four buffer members (44), and the four buffer members (44) are symmetrically arranged with the hot pressing plate (45) as the center.

3. A high-sealing and low-stress cylinder aluminum alloy piston casting demoulding device according to claim 2, characterized in that: The positioning slide frame (41) is sleeved on the outer surface of the hydraulic rod (3). The positioning slide frame (41) is movably installed below the stamping frame (2) through the hydraulic rod (3). The buffer member (44) is adapted to the extrusion of the casting bottom mold (8).

4. A high-sealing and low-stress cylinder aluminum alloy piston casting demoulding device according to claim 3, characterized in that: The buffer member (44) includes a fitting block (441). A connecting clamping block (442) is fixedly installed at the bottom of the fitting block (441). A bent frame (443) is fixedly installed at the bottom of the connecting clamping block (442). A spring frame (444) is fixedly installed at the bottom of the bent frame (443).

5. A high-sealing and low-stress cylinder aluminum alloy piston casting demoulding device according to claim 4, characterized in that: The fitting block (441) is fixedly installed on the outer surface of the outer connecting plate (42). The connecting clamping block (442) is fixedly installed at the bottom of the outer connecting plate (42). The spring frame (444) is adapted to the extrusion of the casting bottom mold (8).

6. The high-sealing and low-stress cylinder aluminum alloy piston casting demolding device according to claim 1, wherein: The clamping assembly (6) includes a mounting base (63). There are two mounting bases (63). Hydraulic cylinders (61) are fixedly installed on the outer surfaces of the two mounting bases (63). A pushing rod (62) is fixedly installed on the surface of the hydraulic cylinder (61). The pushing rod (62) penetrates through the mounting base (63) and extends to its outside. A clamping block (65) is fixedly installed on the surface of the pushing rod (62). A positioning block (64) is fixedly installed on the outer surface of the clamping block (65). There are two groups of positioning blocks (64). A protective pad (66) is fixedly installed between the opposite surfaces of the two groups of positioning blocks (64). Clamping pieces (67) are fixedly installed on the outer surfaces of the positioning blocks (64).

7. A high-sealing and low-stress cylinder aluminum alloy piston casting demoulding device according to claim 6, characterized in that: The mounting base (63) is fixedly installed at the side of the top of the casting table (7). The clamping pieces (67) and the protective pad (66) are adapted to be squeezed against the casting bottom mold (8). The clamping pieces (67) and the protective pad (66) are both made of flexible materials.

8. A high-sealing and low-stress cylinder aluminum alloy piston casting demoulding device according to claim 1, characterized in that: The casting bottom mold (8) includes a sliding base (81). A lifting frame (84) is fixedly installed on the top of the sliding base (81). A forging groove (82) is fixedly installed in the middle of the top of the lifting frame (84). A sealing cavity (86) is fixedly installed inside the forging groove (82). An extrusion pad (85) is fixedly installed on the inner wall of the sealing cavity (86). A demolding pressing part (83) is fixedly installed at the axis of the sealing cavity (86). A hydraulic telescopic rod (87) is movably installed at the bottom of the demolding pressing part (83). A stabilizing support frame (89) is fixedly installed on the outer surface of the hydraulic telescopic rod (87). A round seat (88) is fixedly installed at the bottom of the hydraulic telescopic rod (87) and the stabilizing support frame (89). The round seat (88) is fixedly installed inside the sliding base (81).

9. A high-sealing and low-stress cylinder aluminum alloy piston casting demoulding device according to claim 8, characterized in that: The sliding base (81) is slidably installed on the top of the casting table (7). The sliding base (81) and the lifting frame (84) are both frictionally adapted to the clamping pieces (67) and the protective pad (66). The extrusion pad (85) and the demolding pressing part (83) are adapted to be squeezed against the top mold (46).

10. A high-sealing and low-stress cylinder aluminum alloy piston casting demolding device according to claim 9, characterized in that: The demolding pressing part (83) includes a housing (832). An arc-shaped hollow cover (831) is fixedly installed on the top of the housing (832). A limiting ring (833) is fixedly installed at the bottom of the housing (832). An inner attaching pad ring (834) is fixedly installed on the inner wall of the housing (832). Inclined rings (837) are fixedly installed on both sides of the outer surface of the inner attaching pad ring (834). The inclined rings (837) are fixedly connected to the inner wall of the housing (832). An inner connecting cavity (836) is fixedly installed inside the inclined ring (837). The inner connecting cavity (836) is fixedly connected to the limiting ring (833). An inner pushing pad (835) is movably installed inside the inner connecting cavity (836). The inner pushing pad (835) is fixedly installed on the top of the hydraulic telescopic rod (87).

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