Shell cleaning and crushing device after casting of precision investment casting

Abstract

The invention relates to the technical field of metal casting, in particular to a shell cleaning and crushing device after pouring of a precision investment casting, which comprises a mold hanging mechanism, the mold hanging mechanism comprises a hanging frame and a hook, a feeding mechanism comprises a conveying belt and a material rail, a shifting frame is fixed on the conveying belt, a shell crushing mechanism comprises knocking seats, the knocking seats are arranged on a slag receiving box in pairs, and the knocking seats are arranged on the slag receiving box. Each knocking seat is provided with a plurality of knocking heads, the driving device is used for driving the slag receiving box to do linear reciprocating motion and the slag receiving box of the shell breaking mechanism to do reciprocating motion, so that the knocking heads are continuously close to or far away from a non-demoulded casting, a shell on the non-demoulded casting is broken through the knocking heads to fall off, and the non-demoulded casting rotates in the knocking process of the knocking heads; and a shifting frame arranged on the conveying belt is used for pushing each hanging frame and the non-demolding casting to penetrate through the space between the two knocking seats and the multiple knocking heads in a one-to-one correspondence mode, and continuous demolding of the multiple castings can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of metal casting, and particularly relates to a device for cleaning and breaking a shell mold after casting of a precision investment casting. Background Art

[0002] Investment casting, also known as lost-wax casting, generally refers to a casting process in which a pattern is made of a fusible material, a shell mold is made by coating several layers of refractory materials on the surface of the pattern, then the pattern is melted and discharged from the shell mold to obtain a mold without a parting surface, and after high-temperature roasting, it can be filled with sand for casting. After the investment casting is completed, the shell mold needs to be removed from the casting. The removed shell mold needs to go through processes such as sand cleaning, shakeout, breaking, and sorting, and finally realize the recycling of the molding sand, but it is difficult to completely remove the shell mold at one time.

[0003] A device for cleaning and breaking a shell mold after casting of a precision investment casting with the patent literature publication number of CN112024852A, a base, on which a motor A is fixedly installed, and a hanging rack is fixedly connected to the output shaft of the motor A. The hanging rack is used for hanging the casting and the shell mold. By adopting the technical solution of the present invention, when the casting and the shell mold are hung on the hanging rack, the hanging rack is driven by the motor to rotate, so that the shell mold rotates accordingly. At this time, the operator does not need to hold a high-pressure water gun or pick up the shell mold. The high-pressure water gun can move up and down along the vertical direction under the drive of the motor and aim at the shell mold, so that the shell mold is completely broken and completely cleaned from the casting. However, this patent still has some deficiencies: it is impossible to continuously remove the shell mold from multiple castings. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: to solve the problem that it is difficult to continuously remove the shell mold from multiple castings, the present invention provides a device for cleaning and breaking a shell mold after casting of a precision investment casting to solve the above problem.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a device for cleaning and breaking a shell mold after casting of a precision investment casting, including a mold hanging mechanism, a feeding mechanism, and a shell breaking mechanism. The mold hanging mechanism includes a hanging rack and a hook installed on the hanging rack for hoisting the casting. The feeding mechanism includes a conveyor belt and a pair of material tracks. The two ends of the hanging rack are slidably installed on the material tracks. A plurality of pushing frames for pushing the hanging rack are fixedly arranged at equal intervals on the conveyor belt. The shell breaking mechanism includes a knocking seat, a slag receiving box, and a driving device. The slag receiving box is fixed below the conveyor belt. The knocking seats are arranged in pairs on the inner walls of both sides of the slag receiving box. A plurality of knocking heads are installed on each knocking seat. The driving device is used to drive the slag receiving box to move linearly back and forth, and the moving direction of the slag receiving box is perpendicular to the moving direction of the conveyor belt.

[0006] Preferably, a rack is further erected above the material rail. A shaft seat is fixed in the middle of the hanging bracket. A shaft rod is rotatably installed at the center of the shaft seat. The hook is fixed to the bottom of the shaft rod. A horizontally arranged transmission rod is rotatably installed on one side of the shaft seat. A worm and gear mechanism is further installed on the top of the shaft seat. The worm gear of the worm and gear mechanism is coaxially and fixedly connected to the shaft rod. The worm of the worm and gear mechanism is coaxially and fixedly connected to the transmission rod. Gears are fixed to both ends of the transmission rod, and the gears can mesh with the rack.

[0007] Preferably, chain belt grooves are formed at both ends of the material rail, and a feeding chain belt is installed in the chain belt grooves. The feeding chain belt is used to drive the hanging bracket to approach or move away from below the conveyor belt.

[0008] Preferably, the knocking head is slidably installed on the knocking seat through a knocking rod. A buffer spring is sleeved on the knocking rod, and both ends of the buffer spring are respectively abutted against the knocking head and the knocking seat.

[0009] Preferably, slag dropping grids are formed at the bottom of the slag receiving box. A waste box is arranged below the slag dropping grids, and the waste box is inserted into the outer bottom of the slag receiving box.

[0010] Preferably, the driving device includes a rodless cylinder, a bracket and a slide rail. The bracket is fixed at both ends of the slag receiving box. The bracket is slidably connected to the slide rail. The bottom of the slag receiving box is fixedly connected to the slider of the rodless cylinder. The rodless cylinder is used to drive the slag receiving box to move linearly back and forth.

[0011] Preferably, a sand blasting seat is further fixed on the inner wall of the slag receiving box. A plurality of sand blasting nozzles are fixed on the sand blasting seat, and the sand blasting nozzles are used to blast sand on the surface of the casting.

[0012] Preferably, the plurality of knocking heads on each pair of knocking seats are arranged staggeredly in the vertical direction. The axes of the knocking rods on each pair of knocking seats are located in the same plane and are parallel to each other.

[0013] The beneficial effects of the present invention are as follows: the slag receiving box of the shell breaking mechanism moves back and forth, so that the knocking seats and knocking heads on both sides of the inner wall of the slag receiving box continuously approach or move away from the non-demolded casting. The shell on the non-demolded casting is knocked and broken by the knocking head, and the shell drops. During the knocking process of the knocking head, the shaft rod will also drive the non-demolded casting to rotate, so as to perform all-round knocking on the non-demolded casting. The broken shell is peeled off from the casting under vibration, realizing automatic demolding of the casting. When continuous demolding operations need to be performed on multiple non-demolded castings, the non-demolded castings are hooked by a plurality of hanging brackets respectively, and each hanging bracket and the non-demolded casting are respectively pushed through between the two knocking seats and the plurality of knocking heads by a plurality of dialing brackets arranged on the conveyor belt, so as to realize continuous demolding of multiple castings. Description of the Drawings

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary, and for those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained based on the provided drawings.

[0015] Figure 1 It is a schematic structural diagram of the optimal embodiment of a device for cleaning and breaking the shell of a precision investment casting after pouring of the present invention;

[0016] Figure 2 It is a schematic structural diagram of the dialing frame of a device for cleaning and breaking the shell of a precision investment casting after pouring of the present invention;

[0017] Figure 3 It is a schematic structural diagram of the hanging frame of a device for cleaning and breaking the shell of a precision investment casting after pouring of the present invention;

[0018] Figure 4 It is a schematic structural diagram of the material rail of a device for cleaning and breaking the shell of a precision investment casting after pouring of the present invention;

[0019] Figure 5 is Figure 4 The enlarged view of part A in;

[0020] Figure 6 It is a schematic structural diagram of the slag receiving box of a device for cleaning and breaking the shell of a precision investment casting after pouring of the present invention;

[0021] Figure 7 It is a schematic structural diagram of the knocking head of a device for cleaning and breaking the shell of a precision investment casting after pouring of the present invention.

[0022] Reference numerals: 1, mold hanging mechanism; 2, feeding mechanism; 3, sandblasting nozzle; 4, shell breaking mechanism; 5, sandblasting seat; 6, hanging frame; 7, hanging hook; 8, conveyor belt; 9, material rail; 10, dialing frame; 11, knocking seat; 12, slag receiving box; 13, driving device; 14, knocking head; 15, rack; 16, shaft seat; 17, shaft rod; 18, transmission rod; 19, worm and worm gear mechanism; 20, gear; 21, chain belt groove; 22, feeding chain belt; 23, knocking rod; 24, buffer spring; 25, slag falling grid; 26, waste box; 27, rodless cylinder; 28, bracket; 29, slide rail. Specific embodiments

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] First, the concepts related to the present application will be described below with reference to the accompanying drawings. It should be noted here that the descriptions of the following concepts are only for making the content of the present application easier to understand and do not represent a limitation on the protection scope of the present application; at the same time, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0025] As Figures 1 to 7 shown, an embodiment of a device for cleaning and breaking the shell of a precision investment casting after casting is provided by the present invention, including a mold hanging mechanism 1, a feeding mechanism 2 and a shell breaking mechanism 4. The mold hanging mechanism 1 includes a hanging rack 6 and a hook 7 installed on the hanging rack 6 for hoisting the casting. Before demolding the non-demolded casting, first lift the hanging rack 6 by a crane, hook the non-demolded casting with the hook 7, and then hoist the hanging rack 6 and the non-demolded casting together to the feeding mechanism 2 by the crane.

[0026] The feeding mechanism 2 includes a conveyor belt 8 and a pair of material rails 9. The two ends of the hanging rack 6 are slidably installed on the material rails 9. A plurality of pushing frames 10 for pushing the hanging rack 6 are fixedly arranged at equal intervals on the conveyor belt 8. A rack 15 is also erected above the material rails 9. A shaft seat 16 is fixed in the middle of the hanging rack 6. A shaft rod 17 is rotatably installed at the center of the shaft seat 16. The hook 7 is fixed to the bottom of the shaft rod 17. A horizontally arranged transmission rod 18 is rotatably installed on one side of the shaft seat 16. A worm and gear mechanism 19 is also installed on the top of the shaft seat 16. The worm gear of the worm and gear mechanism 19 is coaxially fixedly connected with the shaft rod 17, and the worm of the worm and gear mechanism 19 is coaxially fixedly connected with the transmission rod 18. Gears 20 are fixed at both ends of the transmission rod 18, and the gears 20 can mesh with the rack 15.

[0027] Chain belt grooves 21 are opened at both ends of the material rails 9, and a feeding chain belt 22 is installed in the chain belt grooves 21. The feeding chain belt 22 is used to drive the hanging rack 6 to approach or move away from the lower part of the conveyor belt 8.

[0028] The working principle of the feeding mechanism 2 is as follows: The crane hoists the hanging rack 6 and the non-demolded casting to the feeding end of the material rail 9, and makes the two ends of the hanging rack 6 fall on the feeding chain belt 22. The hanging rack 6 is conveyed to the lower part of the conveyor belt by the feeding chain belt 22, avoiding the collision between the lifting rope and the conveyor belt 8 during the hoisting process. During the rotation of the conveyor belt 8, the shifting frame 10 is driven to move. When the shifting frame 10 moves to the position of the hanging rack 6, it will push the hanging rack 6 to continue moving forward along the material rail 9, so that the hanging rack 6 and the transmission rod 18 enter between the material rail 9 and the rack 15. The axis height of the transmission rod 18 and the gear 20 is greater than the height of the material rail 9. Therefore, the gears 20 at both ends of the transmission rod 18 can mesh with the rack 15 above the material rail 9. When the hanging rack 6 continues to move forward, the transmission rod 18 rotates and drives the shaft rod 17 to rotate. The rotation of the shaft rod 17 drives the hook 7 and the non-demolded casting to rotate, so that the subsequent shell-breaking mechanism 4 can knock and demold each position of the casting.

[0029] The shell-breaking mechanism 4 includes a knocking seat 11, a slag receiving box 12 and a driving device 13. The slag receiving box 12 is fixed below the conveyor belt 8. The knocking seats 11 are arranged in pairs on the inner walls on both sides of the slag receiving box 12. A plurality of knocking heads 14 are installed on each knocking seat 11. The knocking heads 14 are slidably installed on the knocking seat 11 through knocking rods 23. A buffer spring 24 is sleeved on the knocking rod 23. The two ends of the buffer spring 24 are respectively abutted against the knocking head 14 and the knocking seat 11. When the knocking head 14 contacts the casting, the buffer spring 24 is compressed, so that the plurality of knocking heads 14 can adapt to non-demolded castings of different shapes. The plurality of knocking heads 14 on each pair of knocking seats 11 are arranged staggeredly in the vertical direction. The axes of the knocking rods 23 on each pair of knocking seats 11 are located in the same plane and are parallel to each other. When the non-demolded casting rotates, each knocking head 14 can knock the positions at different heights from top to bottom on the non-demolded casting to ensure that the mold shells at all positions can be knocked and fallen off.

[0030] The driving device 13 is used to drive the slag receiving box 12 to move linearly in a reciprocating manner. The moving direction of the slag receiving box 12 is perpendicular to the moving direction of the conveyor belt 8. The driving device 13 includes a rodless cylinder 27, a bracket 28 and a slide rail 29. The bracket 28 is fixed at both ends of the slag receiving box 12. The bracket 28 is slidably connected with the slide rail 29. The bottom of the slag receiving box 12 is fixedly connected with the slider of the rodless cylinder 27. The rodless cylinder 27 is used to drive the slag receiving box 12 to move linearly in a reciprocating manner.

[0031] When the non-demolded casting moves along the material rail 9 to between the pair of knocking seats 11, the rodless cylinder 27 of the driving device 13 drives the slag receiving box 12 to reciprocate, so that the knocking seats 11 and the knocking heads 14 on both sides of the inner wall of the slag receiving box 12 continuously approach or move away from the non-demolded casting. The mold shell on the non-demolded casting is broken by the knocking heads 14, causing the mold shell to fall off. During the knocking process of the knocking heads 14, the shaft rod 17 will also drive the non-demolded casting to rotate, so as to knock the non-demolded casting in all directions. The broken mold shell is vibrated and peeled off from the casting, realizing the automatic demolding of the casting, and falling to the bottom of the slag receiving box 12 for collection. When continuous demolding operations need to be performed on multiple non-demolded castings, the non-demolded castings are respectively hooked by multiple hanging brackets 6, and each hanging bracket 6 and the non-demolded casting are respectively pushed through between the two knocking seats 11 by multiple pushing brackets 10 arranged on the conveyor belt 8, so as to realize the continuous demolding of multiple castings.

[0032] A slag dropping grid 25 is provided at the bottom of the slag receiving box 12, and a waste box 26 is arranged below the slag dropping grid 25. The waste box 26 is inserted into the outer bottom of the slag receiving box 12. During the reciprocating movement of the slag receiving box 12, the mold shell fragments at the bottom can pass through the slag dropping grid 25 and enter the waste box 26 for centralized collection. When the waste box 26 is full, the waste box 26 can be pulled out from the bottom of the slag receiving box 12 for cleaning.

[0033] A sand blasting seat 5 is also fixed on the inner wall of the slag receiving box 12. Multiple sand blasting nozzles 3 are fixed on the sand blasting seat 5. The sand blasting nozzles 3 are used to sand blast the surface of the casting. After the casting is demolded, there may still be a small amount of mold shell debris adhered to its surface. At this time, by sand blasting the surface of the casting with the sand blasting nozzles 3, the remaining mold shell on the surface of the casting and the mold shell in the dead corners can be peeled off, improving the demolding effect of the casting. The position of the spraying nozzle is lower than the height of the side walls on both sides of the slag receiving box 12, which can prevent the spraying and splashing range from being too large. In actual production, the precision investment casting pouring and mold shell cleaning and crushing device of this embodiment is generally arranged in a relatively enclosed production workshop.

[0034] In this article, specific examples are used to elaborate on the principles and implementation methods of this application. The descriptions of the above embodiments are only used to help understand the method and its core idea of this application. The above are only the preferred implementation methods of this application. It should be noted that due to the limited nature of language expression and the objectively infinite specific structures, for those of ordinary skill in the art in this technical field, without departing from the principle of this application, several improvements, refinements or changes can be made, or the above technical features can be combined in an appropriate manner; these improvements, refinements, changes or combinations, or directly applying the inventive concept and technical solution to other occasions without improvement, should all be regarded as the protection scope of this application.

Claims

1. A cleaning and crushing device for the shell of a precision investment casting after pouring, characterized in that: It includes a mold hanging mechanism (1), a feeding mechanism (2) and a shell breaking mechanism (4). The mold hanging mechanism (1) includes a hanging rack (6) and hooks (7) installed on the hanging rack (6) for hoisting castings. The feeding mechanism (2) includes a conveyor belt (8) and a pair of material tracks (9). The two ends of the hanging rack (6) are slidably installed on the material tracks (9). A plurality of pushing frames (10) for pushing the hanging rack (6) are fixedly arranged at equal intervals on the conveyor belt (8). The shell breaking mechanism (4) includes a knocking seat (11), a slag receiving box (12) and a driving device (13). The slag receiving box (12) is fixed below the conveyor belt (8). The knocking seats (11) are arranged in pairs on the inner walls of both sides of the slag receiving box (12). A plurality of knocking heads (14) are installed on each knocking seat (11). The driving device (13) is used to drive the slag receiving box (12) to move linearly back and forth. The moving direction of the slag receiving box (12) is perpendicular to the moving direction of the conveyor belt (8).

2. The cleaning and crushing device for the shell after casting of a precision investment casting as described in claim 1, wherein: A rack (15) is also erected above the material tracks (9). A shaft seat (16) is fixed in the middle of the hanging rack (6). A shaft rod (17) is rotatably installed at the center of the shaft seat (16). The hook (7) is fixed to the bottom of the shaft rod (17). A horizontally arranged transmission rod (18) is rotatably installed on one side of the shaft seat (16). A worm and gear mechanism (19) is also installed on the top of the shaft seat (16). The worm wheel of the worm and gear mechanism (19) is coaxially and fixedly connected to the shaft rod (17). The worm of the worm and gear mechanism (19) is coaxially and fixedly connected to the transmission rod (18). Gears (20) are fixed to both ends of the transmission rod (18). The gears (20) can mesh with the rack (15).

3. The post-casting shell cleaning and crushing device for precision investment castings according to claim 1, wherein: Chain belt grooves (21) are formed at both ends of the material tracks (9). A feeding chain belt (22) is installed in the chain belt grooves (21). The feeding chain belt (22) is used to drive the hanging rack (6) to approach or move away from below the conveyor belt (8).

4. The post-casting shell cleaning and crushing device for precision investment castings according to claim 1, characterized in that: The knocking heads (14) are slidably installed on the knocking seats (11) through knocking rods (23). A buffer spring (24) is sleeved on the knocking rods (23). Both ends of the buffer spring (24) are respectively abutted against the knocking heads (14) and the knocking seats (11).

5. The cleaning and crushing device for the shell after pouring of a precision investment casting as described in claim 1, wherein: A slag dropping grid (25) is formed at the bottom of the slag receiving box (12). A waste box (26) is arranged below the slag dropping grid (25). The waste box (26) is inserted into the outer bottom of the slag receiving box (12).

6. The post-casting shell cleaning and crushing device for precision investment castings according to claim 1, wherein: The driving device (13) includes a rodless cylinder (27), a bracket (28) and a slide rail (29). The brackets (28) are fixed at both ends of the slag receiving box (12). The brackets (28) are slidably connected to the slide rail (29). The bottom of the slag receiving box (12) is fixedly connected to the slider of the rodless cylinder (27). The rodless cylinder (27) is used to drive the slag receiving box (12) to move linearly back and forth.

7. The deburring and crushing device for the shell of a precision investment casting after pouring according to claim 1, wherein: On the inner wall of the slag receiving box (12), a sand blasting seat (5) is further fixed, and a plurality of sand blasting nozzles (3) are fixed on the sand blasting seat (5), and the sand blasting nozzles (3) are used for sand blasting on the surface of the casting.

8. The post-casting shell cleaning and crushing device for precision investment castings according to claim 4, wherein: The plurality of knocking heads (14) on each pair of knocking seats (11) are arranged staggeredly in the vertical direction, and the axes of the knocking rods (23) on each pair of knocking seats (11) are located in the same plane and are parallel to each other.

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