Low-pressure casting machine

Abstract

The utility model relates to the technical field of casting machines, in particular to a low-pressure casting machine. A low-pressure casting machine comprises a working table, an upper die and two lower dies are arranged on the working table, the upper die is arranged over the lower dies, the two lower dies are symmetrically arranged on the working table with the upper die as the symmetry axis, the upper die slides in a positionable and reciprocating mode in the vertical direction, and the lower dies are arranged on the working table. The two lower dies are synchronously and mutually close to or away from each other in the horizontal direction and are connected to the workbench in a sliding mode, and the two lower dies are detachably connected with the workbench. The die has the following effects that when castings of different shapes and sizes are cast, only the lower die on the workbench needs to be detached and replaced with the lower die meeting the size requirements of the castings, the castings of different shapes and sizes can be conveniently cast, and the casting efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of casting machines, and in particular to a low-pressure casting machine. Background Art

[0002] A low-pressure casting machine is required during the research and development process of high-precision machining technology for low-pressure casting.

[0003] For example, a low-pressure casting machine is disclosed in a Chinese utility model patent with the authorization announcement number CN214720461U, which includes a holding furnace. A sealing cover and an inlet pipe are provided on the holding furnace. A lifting pipe is provided inside the holding furnace. The lifting pipe penetrates through the sealing cover. A cooling table is provided on the sealing cover. A liquid passage hole is opened on the cooling table. The liquid passage hole is communicated with the inside of the lifting pipe. A cooling pipe is provided inside the cooling table. Both ends of the cooling pipe penetrate through the cooling table. A lower mold is slidably connected to the cooling table. A liquid injection hole for communicating with the liquid passage hole is opened on the lower mold. A lower hydraulic cylinder is provided on the cooling table. The piston rod of the lower hydraulic cylinder is connected to the lower mold. A support rod is provided on the cooling table. A top plate is provided on the support rod. An upper hydraulic cylinder is provided on the top plate. The piston rod of the upper hydraulic cylinder penetrates through the top plate. The piston rod of the upper hydraulic cylinder is connected with an upper mold.

[0004] However, when casting castings with different shapes and sizes, different low-pressure casting machines need to be replaced to cast castings with different shapes and sizes, which is rather troublesome and the casting efficiency is relatively low. Utility Model Content

[0005] In order to facilitate the casting of castings with different shapes and sizes and improve the casting efficiency, the present application provides a low-pressure casting machine.

[0006] A low-pressure casting machine provided by the present application adopts the following technical scheme: It includes a workbench, an upper mold and two lower molds are arranged on the workbench. The upper mold is arranged directly above the lower molds. The two lower molds are symmetrically arranged on the workbench with the upper mold as the symmetry axis. The upper mold can be reciprocally slid in a positionable manner in the vertical direction. The two lower molds are slidably connected to the workbench so as to approach or move away from each other synchronously in the horizontal direction. The two lower molds are detachably connected to the workbench.

[0007] By adopting the above technical scheme, when casting castings with different shapes and sizes, only the lower mold on the workbench needs to be disassembled and replaced with a lower mold adapted to the size requirements of the casting, which is convenient for casting castings with different shapes and sizes and improves the casting efficiency.

[0008] Preferably, a dovetail slide bar is arranged on the lower mold. The length direction of the dovetail slide bar is parallel to the sliding direction of the lower mold. A dovetail groove for the dovetail slide bar to slide and be embedded is opened on the upper surface of the workbench. The depth direction of the dovetail groove is opened in the vertical direction. The length direction of the dovetail groove is parallel to the sliding direction of the lower mold.

[0009] By adopting the above technical solution, the dovetail slide bar is slidably embedded in the dovetail groove to provide a guiding function for the sliding of the lower mold, and the shapes of the dovetail slide bar and the dovetail groove limit other relative movements of the lower mold except in the sliding direction, which improves the casting accuracy to a certain extent.

[0010] Preferably, the dovetail groove penetrates through one side wall of the workbench along the sliding direction of the lower mold. Two mounting plates are perpendicularly arranged on both sides of the workbench with respect to the upper surface of the workbench. The two mounting plates are symmetrically arranged on both sides of the workbench. A driving cylinder for driving the lower mold to slide is arranged on the mounting plate, and the mounting plate is reciprocally slidably connected to the workbench in a vertically positionable manner.

[0011] By adopting the above technical solution, the dovetail groove penetrates through one side wall of the workbench, and the lower mold can slide along the dovetail groove to be disassembled from the workbench. The setting of the mounting plate hinders the sliding of the lower mold. When the lower mold needs to be disassembled, the mounting plate is slid upward in the vertical direction to provide an avoidance for the sliding of the lower mold.

[0012] Preferably, a T-shaped push block is arranged on the workbench. The piston rod of the driving cylinder vertically passes through the mounting plate and is perpendicularly connected to the T-shaped push block. A T-shaped groove for the T-shaped push block to slide and be embedded is formed on one side wall of the lower mold away from the workbench, and the T-shaped groove penetrates through the upper surface of the lower mold in the vertical direction.

[0013] By adopting the above technical solution, during the upward sliding process of the mounting plate, the driving cylinder and the T-shaped push block slide upward accordingly. After the lower mold is installed, the mounting plate slides downward to drive the T-shaped push block to slide and insert into the T-shaped groove. Since the T-shaped push block is embedded in the T-shaped groove, the reciprocating movement of the piston rod of the driving cylinder drives the lower mold to slide together.

[0014] Preferably, it further includes a material receiving and transporting member. The material receiving and transporting member is located on one side of the workbench. The material receiving and transporting member is used to receive the castings after casting. A pushing member is arranged on the workbench. The pushing member and the material receiving and transporting member are respectively located on opposite sides of the workbench. The pushing member is used to push the castings after casting onto the material receiving and transporting member.

[0015] By adopting the above technical solution, the pushing member pushes the castings after casting on the workbench onto the material receiving and transporting member, and the material receiving and transporting member facilitates transporting the castings after casting to the next process.

[0016] Preferably, the material receiving and transporting member includes a material receiving table and a transport vehicle. The material receiving table is disposed directly above the transport vehicle. The material receiving table is used for receiving the castings that have completed casting. The material receiving table and the transport vehicle are connected by an elastic member. Four universal wheels are provided at the bottom of the transport vehicle, and the four universal wheels are distributed in a rectangular shape at the bottom of the transport vehicle.

[0017] By adopting the above technical solution, the elastic member between the material receiving table and the transport vehicle provides buffering for the castings that have completed casting and are transported to the material receiving table. The four universal wheels distributed in a rectangular shape improve the convenience of the transport vehicle.

[0018] Preferably, at least one cooling fan is provided on the workbench. A plurality of the cooling fans are arranged on the workbench at equal angular intervals along the circumferential direction of the central axis of the workbench, and the cooling fans face the upper surface of the workbench.

[0019] By adopting the above technical solution, the plurality of cooling fans provide a good cooling effect for the castings that have completed casting.

[0020] Preferably, an adjusting block is provided on the workbench. The adjusting block corresponds to the cooling fan one by one. The adjusting block can be positioned and reciprocally slid in the vertical direction. One end of the cooling fan is provided with an adjusting ball. An adjusting ball sleeve is provided on the adjusting block. The adjusting ball is embedded in the adjusting ball sleeve, and the adjusting ball is rotationally connected to the adjusting ball sleeve with damping.

[0021] By adopting the above technical solution, the height and the orientation angle of the cooling fan can be adjusted.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. When casting castings of different shapes and sizes, only the lower mold on the workbench needs to be disassembled and replaced with a lower mold adapted to the size requirements of the castings, which is convenient for casting castings of different shapes and sizes and improves the casting efficiency;

[0024] 2. The dovetail slide bar is slidably embedded in the dovetail groove to provide a guiding function for the sliding of the lower mold;

[0025] 3. The pushing member pushes the castings that have completed casting on the workbench onto the material receiving and transporting member, and the material receiving and transporting member is convenient for transporting the castings that have completed casting to the next process. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of the overall structure of the present application;

[0027] Figure 2 is Figure 1 a partial enlarged schematic diagram of part A in

[0028] Figure 3 is a partial structural schematic diagram of the present application;

[0029] Figure 4 is an overall structural schematic diagram of another perspective of the present application;

[0030] Figure 5 is Figure 4 a partially enlarged schematic diagram of part B in;

[0031] Figure 6 is Figure 4 a partially enlarged schematic diagram of part C in;

[0032] Figure 7 is Figure 1 a partially enlarged schematic diagram of part D in.

[0033] Explanation of reference numerals: 110, workbench; 111, holding furnace; 112, liquid through hole; 113, upper mold; 114, lower mold; 115, upper hydraulic cylinder; 116, top plate; 117, liquid injection hole; 120, mounting plate; 121, mounting column; 122, driving cylinder; 123, slider; 124, chute; 125, adjusting screw rod; 126, screw rod motor; 130, dovetail slide bar; 131, dovetail groove; 140, T-shaped push block; 141, T-shaped groove; 150, cooling fan; 151, adjusting block; 152, bolt hole; 153, adjusting bolt; 154, adjusting ball; 155, adjusting ball sleeve; 160, material receiving and transporting member; 161, material receiving table; 162, transport vehicle; 163, universal wheel; 170, pushing member; 171, pushing cylinder; 172, pushing plate; 173, pushing mounting plate; 180, connecting spring. Detailed Description of the Invention

[0034] The present application will be further described in detail below with reference to the accompanying drawings.

[0035] The present application discloses a low-pressure casting machine, which is used to facilitate the casting of castings with different shapes and sizes and improve the casting efficiency.

[0036] Refer to Figure 1 、 Figure 2, a low-pressure casting machine, comprising a workbench 110, a holding furnace 111 is arranged below the workbench 110, a liquid passage hole 112 runs through the workbench 110 in the vertical direction, the liquid passage hole 112 is communicated with the holding furnace 111, an upper mold 113 and two lower molds 114 are arranged on the workbench 110, the upper mold 113 is arranged directly above the lower molds 114, the two lower molds 114 are symmetrically arranged on the workbench 110 with the upper mold 113 as the axis of symmetry, an upper hydraulic cylinder 115 and a top plate 116 for installing the upper hydraulic cylinder 115 are arranged on the workbench 110, the top plate 116 is installed directly above the workbench 110 through four mounting columns 121, the four mounting columns 121 are rectangularly distributed between the top plate 116 and the workbench 110, the upper hydraulic cylinder 115 is vertically arranged at the center position above the top plate 116, the piston rod of the upper hydraulic cylinder 115 passes through the top plate 116 and is connected to the upper mold 113, and the upper hydraulic cylinder 115 drives the upper mold 113 to reciprocate and slide vertically in a positionable manner; two mounting plates 120 are arranged perpendicular to the upper surface of the workbench 110 on both sides of the workbench 110, the two mounting plates 120 are symmetrically arranged on both sides of the workbench 110, in this embodiment, the two ends of the mounting plate 120 are respectively attached to the two mounting columns 121, a driving cylinder 122 for driving the lower mold 114 to slide is arranged on the mounting plate 120, the two lower molds 114 are slidably connected to the workbench 110 in a synchronous manner approaching or separating from each other in the horizontal direction, a liquid injection hole 117 is formed in the lower mold 114, the liquid injection hole 117 formed in each lower mold 114 is semicircular, when the two lower molds 114 approach each other to fit, the liquid injection holes 117 on the two lower molds 114 are spliced into a complete circular liquid injection hole 117.

[0037] When manufacturing a casting using the low-pressure casting machine, start the upper hydraulic cylinder 115 and the driving cylinder 122, the piston rod of the upper hydraulic cylinder 115 drives the upper mold 113 to move downward, the piston rod of the driving cylinder 122 drives the lower mold 114 to slide on the workbench 110, when the upper mold 113 and the lower mold 114 are joined together, the liquid injection hole 117 and the liquid passage hole 112 are aligned, compressed air is introduced into the holding furnace 111 through the air inlet pipe, under the pressure of the compressed air, the molten metal in the holding furnace 111 rises and enters the cavity between the upper mold 113 and the lower mold 114 through the liquid passage hole 112 and the liquid injection hole 117, and the casting can be formed when the cavity is filled with the molten metal.

[0038] Since different low-pressure casting machines need to be replaced to cast castings of different shapes and sizes, which is rather troublesome and the casting efficiency is low, in this embodiment, the two lower molds 114 are detachably connected to the workbench 110. When casting castings of different shapes and sizes, only need to remove the lower mold 114 on the workbench 110 and replace it with a lower mold 114 adapted to the size requirements of the casting, which is convenient for casting castings of different shapes and sizes and improves the casting efficiency.

[0039] Specifically, referring to Figure 2 and Figure 3 , a dovetail slide bar 130 is provided on the lower mold 114. The length direction of the dovetail slide bar 130 is parallel to the sliding direction of the lower mold 114. A dovetail groove 131 for the dovetail slide bar 130 to slide and be embedded is formed on the upper surface of the workbench 110. The depth direction of the dovetail groove 131 is arranged in the vertical direction. The length direction of the dovetail groove 131 is parallel to the sliding direction of the lower mold 114. The dovetail groove 131 penetrates through one side wall of the workbench 110 along the sliding direction of the lower mold 114. In this embodiment, two dovetail slide bars 130 are provided at the bottom of each lower mold 114. The two dovetail slide bars 130 are arranged in parallel at the bottom of the lower mold 114. Correspondingly, four dovetail grooves 131 are formed on the upper surface of the workbench 110. The lower mold 114 can slide along the dovetail groove 131 to be disassembled from the workbench 110.

[0040] However, referring to Figure 4 and Figure 5 , the settings of the mounting plate 120 and the driving cylinder 122 will limit the sliding disassembly of the lower mold 114. Therefore, the mounting plate 120 is connected to the workbench 110 in a reciprocating sliding manner that can be positioned in the vertical direction. Specifically, sliders 123 extend from both ends of the mounting plate 120. A sliding groove 124 is formed on the side wall of each mounting column 121 close to the mounting plate 120. The length direction of the sliding groove 124 is arranged in the vertical direction. The slider 123 is embedded in the sliding groove 124 and can slide reciprocally and be positioned along the length direction of the sliding groove 124. An adjusting screw rod 125 is provided on each mounting column 121. The adjusting screw rod 125 is embedded in the sliding groove 124 and the length direction of the adjusting screw rod 125 is parallel to the length direction of the sliding groove 124. Four screw rod motors 126 are provided on the top plate 116. The four screw rod motors 126 and the four adjusting screw rods 125 are in one-to-one correspondence. One end of the adjusting screw rod 125 passes through the groove wall of the sliding groove 124 and the top plate 116 and is coaxially connected to the output shaft of the screw rod motor 126. The other end of the adjusting screw rod 125 passes through the slider 123 and is axially fixed and circumferentially rotatably connected to the other side groove wall of the sliding groove 124.

[0041] Referring to Figure 3 and Figure 6A T-shaped push block 140 is provided on the workbench 110, and the piston rod of the driving cylinder 122 passes vertically through the mounting plate 120 and is vertically connected to the T-shaped push block 140. A T-shaped slot 141 for the T-shaped push block 140 to slide and be embedded is provided on the side wall of the lower mold 114 away from the workbench 110. The T-shaped slot 141 passes through the upper surface of the lower mold 114 in the vertical direction. During the upward sliding of the mounting plate 120, the driving cylinder 122 and the T-shaped push block 140 slide upward accordingly. After the lower mold 114 is installed, the mounting plate 120 slides downward, driving the T-shaped push block 140 to slide and insert into the T-shaped slot 141. Since the T-shaped push block 140 is embedded in the T-shaped slot 141, the reciprocating motion of the piston rod of the driving cylinder 122 drives the lower mold 114 to slide together.

[0042] refer to Figure 1 、 Figure 7 , the casting needs to be cooled after casting, so at least one cooling fan 150 is provided on the workbench 110. In this embodiment, a total of four cooling fans 150 are provided, and the four cooling fans 150 are respectively provided on the four mounting columns 121. An adjustment block 151 is provided on the workbench 110. The adjustment block 151 can be positioned and reciprocated along the vertical direction. The adjustment block 151 and the cooling fan 150 correspond one to one. The adjustment block 151 is sleeved on the mounting column 121, and a plurality of screws are provided on the side wall of the mounting column 121 away from the slide groove 124. Bolt hole 152, multiple bolt holes 152 are opened at equal distances in the vertical direction, and an adjusting bolt 153 is passed through the adjusting block 151, and the adjusting bolt 153 is threadedly embedded in the bolt hole 152 after passing through the adjusting block 151. Furthermore, an adjusting ball 154 is provided at one end of the cooling fan 150, and an adjusting ball sleeve 155 is provided on the adjusting block 151. The adjusting ball 154 is embedded in the adjusting ball sleeve 155, and the adjusting ball 154 and the adjusting ball sleeve 155 are connected in a damping rotation, so that the cooling fan 150 can be adjusted in height and direction angle.

[0043] Further, refer to Figure 1 、 Figure 2 and Figure 4 The above-mentioned low-pressure casting machine also includes a material receiving and transporting part 160, which is located on one side of the workbench 110. The material receiving and transporting part 160 is used to receive the completed castings. A pushing part 170 is provided on the workbench 110. The pushing part 170 and the material receiving and transporting part 160 are respectively located on opposite sides of the workbench 110. The pushing part 170 is used to push the completed castings onto the material receiving and transporting part 160. The pushing part 170 pushes the completed castings on the workbench 110 onto the material receiving and transporting part 160. The material receiving and transporting part 160 facilitates the transportation of the completed castings to the next process.

[0044] Specifically, the pushing member 170 includes a pushing cylinder 171 and a pushing plate 172. A pushing mounting plate 173 is vertically arranged on the workbench 110. The pushing cylinder 171 is vertically arranged on the side of the pushing mounting plate 173 away from the workbench 110. The piston rod of the pushing cylinder 171 vertically passes through the pushing mounting plate 173 and is vertically connected to the pushing plate 172. The material receiving and transporting member 160 includes a material receiving table 161 and a transport vehicle 162. The material receiving table 161 is arranged directly above the transport vehicle 162. The material receiving table 161 is used to receive the castings that have completed casting. The material receiving table 161 and the transport vehicle 162 are connected by elastic members. In this embodiment, the elastic members are four connecting springs 180. One end of the connecting spring 180 is connected to the material receiving table 161, and the other end of the connecting spring 180 is connected to the transport vehicle 162. The four connecting springs 180 are distributed in a rectangle. Four universal wheels 163 are arranged at the bottom of the transport vehicle 162. The four universal wheels 163 are distributed in a rectangle at the bottom of the transport vehicle 162.

[0045] The implementation principle of a low-pressure casting machine according to an embodiment of the present application is as follows: The two lower molds 114 are detachably connected to the workbench 110. When casting castings of different shapes and sizes, only the lower mold 114 on the workbench 110 needs to be disassembled and replaced with a lower mold 114 adapted to the size requirements of the casting, which is convenient for casting castings of different shapes and sizes and improves the casting efficiency.

[0046] The embodiments of the specific implementation manners are all preferred embodiments of the present application, and do not limit the protection scope of the present application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A low-pressure casting machine, comprising a workbench (110), an upper mold (113) and two lower molds (114) are arranged on the workbench (110), the upper mold (113) is arranged directly above the lower molds (114), the two lower molds (114) are symmetrically arranged on the workbench (110) with the upper mold (113) as the axis of symmetry, the upper mold (113) can be reciprocally slid vertically and positioned, and the two lower molds (114) are slidably connected to the workbench (110) in a synchronous manner and move closer to or away from each other horizontally, and it is characterized in that: The two lower molds (114) are detachably connected to the workbench (110).

2. A low-pressure casting machine according to claim 1, characterized in that: The lower mold (114) is provided with a dovetail slide bar (130), the length direction of the dovetail slide bar (130) is parallel to the sliding direction of the lower mold (114), a dovetail groove (131) for the dovetail slide bar (130) to slide and be embedded is formed on the upper surface of the workbench (110), the depth direction of the dovetail groove (131) is arranged in the vertical direction, and the length direction of the dovetail groove (131) is parallel to the sliding direction of the lower mold (114).

3. The low-pressure casting machine according to claim 2, wherein: The dovetail groove (131) penetrates through one side wall of the workbench (110) along the sliding direction of the lower mold (114), two mounting plates (120) are perpendicularly arranged on both sides of the workbench (110) and perpendicular to the upper surface of the workbench (110), the two mounting plates (120) are symmetrically arranged on both sides of the workbench (110), and a driving cylinder (122) for driving the lower mold (114) to slide is arranged on the mounting plate (120), and the mounting plate (120) is reciprocally slidably connected to the workbench (110) in a vertically positionable manner.

4. The low-pressure casting machine according to claim 3, characterized in that: A T-shaped push block (140) is arranged on the workbench (110), the piston rod of the driving cylinder (122) vertically passes through the mounting plate (120) and is perpendicularly connected to the T-shaped push block (140), a T-shaped groove (141) for the T-shaped push block (140) to slide and be embedded is formed on the side wall of the lower mold (114) away from the workbench (110), and the T-shaped groove (141) penetrates through the upper surface of the lower mold (114) in the vertical direction.

5. A low-pressure casting machine according to claim 1, characterized in that: It further includes a material receiving and transporting member (160), the material receiving and transporting member (160) is located on one side of the workbench (110), the material receiving and transporting member (160) is used for receiving the castings completed in casting, a pushing member (170) is arranged on the workbench (110), the pushing member (170) and the material receiving and transporting member (160) are respectively located on the opposite sides of the workbench (110), and the pushing member (170) is used for pushing the castings completed in casting onto the material receiving and transporting member (160).

6. A low-pressure casting machine according to claim 5, characterized in that: The material receiving and transporting member (160) includes a material receiving table (161) and a transport vehicle (162), the material receiving table (161) is arranged directly above the transport vehicle (162), the material receiving table (161) is used for receiving the castings completed in casting, the material receiving table (161) and the transport vehicle (162) are connected by an elastic member, and four universal wheels (163) are arranged at the bottom of the transport vehicle (162), and the four universal wheels (163) are distributed in a rectangle at the bottom of the transport vehicle (162).

7. A low-pressure casting machine according to claim 1, characterized in that: At least one cooling fan (150) is arranged on the workbench (110), and a plurality of the cooling fans (150) are circumferentially and equally angularly spaced on the workbench (110) along the central axis of the workbench (110), and the cooling fans (150) face the upper surface of the workbench (110).

8. A low-pressure casting machine according to claim 7, characterized in that: An adjustment block (151) is provided on the workbench (110). The adjustment blocks (151) correspond to the cooling fans (150) one by one. The adjustment block (151) can be positioned and reciprocally slid in the vertical direction. One end of the cooling fan (150) is provided with an adjustment ball (154). An adjustment ball sleeve (155) is provided on the adjustment block (151). The adjustment ball (154) is embedded in the adjustment ball sleeve (155), and the adjustment ball (154) is rotatably connected to the adjustment ball sleeve (155) with damping.

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