Drum type old sand recovery device and recovery method

Abstract

The present invention discloses a drum-type old sand recovery device and recovery method, comprising a sand mill, a frame, and a sand mixing drum device, wherein the sand mill is arranged on the top of the frame, the bottom outer wall of the sand mill is fixedly connected to the top outer wall of the frame, the sand mixing drum device is arranged inside the frame, the bottom outer wall of the sand mixing drum device is fixedly connected to the bottom of the inner wall of the frame, a screen is fixedly connected to the top of the frame, a sand adding device is fixedly connected to the top of the inner wall of the frame, and the sand mixing drum device comprises a drum bracket, which is welded between the inner walls of the frame. The drum is driven by a motor to rotate at high speed, and the sand moves at high speed inside the drum, and the sand mixing uniformity is high. The drum is designed with a block inside, and the blocks are all mechanical mounting parts, which are wear-resistant, not easy to damage, easy to replace, convenient to repair, and low in maintenance cost. Finally, the old sand recovery is integrated to improve the sand circulation efficiency, the sand mixing uniformity, and the printing quality.

Description

Technical Field

[0001] The invention belongs to the technical field of 3D printers, and in particular relates to a drum-type used sand recovery device and a recovery method. Background Art

[0002] At present, in the process of printing the whole box of molds, the sand spreaders in front and behind the printer working box will release sand, and the sand cleaning station will also release sand during the sand cleaning process. However, some of the released sand is mixed with sand agglomerates and cannot be used directly. They all need to be sintered by thermal method before they can be used, which is inefficient.

[0003] During each sand mixing process, after sand and curing agent are added into the sand mixing tank, the sand in the lower layer of the sand mixing tank is mixed vigorously and evenly, while the sand in the upper layer of the sand mixing tank is mixed unevenly, which affects the quality of sand mold printing; secondly, the drum stirring blades are driven by motors, which are prone to failure, inconvenient to maintain, and the maintenance cost is also high. In response to this situation, this patent proposes a drum-type old sand recovery device. Summary of the invention

[0004] The purpose of the present invention is to provide a drum-type used sand recovery device and a recovery method to solve the problems in the above-mentioned background technology that the existing drum-type used sand recovery device is unevenly mixed in the upper part of the sand mixing tank and the stirring blades are prone to malfunction during use, thereby affecting the sand mold printing quality and making the machine inconvenient to repair.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a drum-type used sand recovery device, comprising a sand mill, a frame, and a sand mixing drum device, wherein the sand mill is arranged on the top of the frame, and the bottom outer wall of the sand mill is fixedly connected to the top outer wall of the frame; the sand mixing drum device is arranged inside the frame, and the bottom outer wall of the sand mixing drum device is fixedly connected to the bottom of the inner wall of the frame; a screen is fixedly connected to the top of the frame, and a sand adding device is fixedly connected to the top of the inner wall of the frame.

[0006] The sand mixing drum device includes a drum bracket, which is welded between the inner walls of the frame, a motor is fixedly connected to the side plate of the drum bracket, a cylinder guide component is fixedly connected to the outer wall of the drum, the cylinder guide component includes a cylinder, the bottom of the outer wall of the cylinder is fixedly connected to the outer wall of the drum, a sand adding leakage prevention plate is fixedly connected to the outer wall of the cylinder, a sand baffle plate is fixedly connected to one end of the cylinder, guide mounting plates are fixedly connected to the inner walls of both sides of the sand adding leakage prevention plate, and a sand receiving leakage prevention port is fixedly connected to the bottom of the inner wall of the drum bracket and located below the drum.

[0007] Preferably, a sand pipe 1 and a sand pipe 2 are fixedly connected to an outer wall of one side of the sand mill, and one end of the sand pipe 1 and the sand pipe 2 away from the sand mill are connected to a sand cleaning station and a printer respectively.

[0008] Preferably, the sand adding device includes a lower sand hopper, which is welded to the inner wall of the frame, a curing agent adding pipe is fixedly connected to the outer wall of the lower sand hopper, a lower sand leakage prevention plate is welded to the bottom of the lower sand hopper, and a through hole is opened on the lower sand leakage prevention plate for placing the curing agent adding pipe.

[0009] Preferably, a sliding groove for the sand retaining plate to slide is provided in the guide mounting plate, and the sand retaining plate is slidably connected to the guide mounting plate via the sliding groove.

[0010] Preferably, a cylinder guide sealing strip is fixedly connected to the bottom of the sand retaining plate.

[0011] Preferably, a connecting shaft is fixedly connected to the inner wall of the drum, the drum is fixedly connected to the output shaft of the motor via the connecting shaft, and stirring baffles are fixedly connected to the outer walls on both sides of the connecting shaft.

[0012] A recycling method of a drum-type used sand recycling device comprises the following steps:

[0013] S1. The sand mill extracts a certain amount of old sand from the printer and the sand cleaning station. The sand mill screens the sand inside the remaining sand, and grinds the small lumps into granular sand, and then adds it into the sand mixing drum device through the screen and the lower sand hopper. Before adding sand, the cylinder guide component is rotated and positioned to the bottom of the lower sand hopper through the motor and encoder. The lower sand leakage prevention plate is opposite to the sand adding leakage prevention plate, and the gap is matched to prevent sand from leaking sideways.

[0014] S2. The cylinder ventilation drives the sand baffle, the guide mounting plate guides, the sand adding port is opened, the lower sand hopper is filled with sand, and the curing agent is added at the same time. Since the curing agent remains in the old sand from the sand cleaning station and the printer, but the curing agent has crystallized, the sand is still acidic. During the sand mixing process, the amount of curing agent added is lower than the amount of curing agent added to the new sand, but a certain amount of curing agent still needs to be added.

[0015] S3. After adding sand, the cylinder drives the sand baffle to close along the guide mounting plate, and the drum rotates at high speed driven by the motor. The cylinder guide sealing strip acts as a seal during the rotation process to prevent sand leakage. After the sand is mixed evenly, the motor and encoder are used to rotate and position the cylinder guide component to the top of the sand receiving anti-leakage port. The sand receiving anti-leakage port is directly opposite to the sand adding anti-leakage plate, and the gap is matched.

[0016] S4. The cylinder drives the sand baffle to open along the guide mounting plate, and the sand enters the sand storage container through the sand receiving and anti-leakage port. The above actions are repeated in this cycle.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The drum-type old sand recovery device provided by the present invention is mainly used for recovering old sand from sand cleaning stations and printers. It can directly recover the old sand in the sand cleaning stations and printers. During the old sand recovery process, it is convenient to crush the agglomerated old sand into sand particles, which can be directly mixed with sand and convenient to add curing agent.

[0019] 2. The present invention drives the drum to rotate at high speed through a motor, and the sand moves at high speed inside the drum. The sand mixing is highly uniform. The drum is designed with blocks inside, and the blocks are all mechanical mounting parts, which are wear-resistant and not easy to damage. They are easy to replace and maintain, with low maintenance costs. Finally, old sand recovery is integrated to improve sand circulation efficiency, sand mixing uniformity, and printing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure of the frame of the present invention;

[0022] Figure 3 It is a structural schematic diagram of the sand adding device of the present invention;

[0023] Figure 4 It is a partial structural schematic diagram of the sand mixing drum device of the present invention;

[0024] Figure 5 It is a partial structural schematic diagram of the drum of the present invention;

[0025] Figure 6 It is a structural schematic diagram of the cylinder guide component of the present invention;

[0026] Figure 7 It is a side view of the sand mixing drum device of the present invention;

[0027] Figure 8 It is a front view of the sand mixing drum device of the present invention.

[0028] In the figure: 100, sand mill; 101, sand pipe 1; 102, sand pipe 2; 200, frame; 210, screen; 220, sand adding device; 221, lower sand hopper; 222, curing agent adding pipe; 223, lower sand leakage prevention plate; 300, sand mixing drum device; 310, motor; 320, cylinder guide component; 321, cylinder; 322, sand retaining plate; 323, guide mounting plate; 324, sand leakage prevention plate; 325, cylinder guide sealing strip; 330, drum; 331, connecting shaft; 332, stirring baffle; 340, sand leakage prevention port; 350, drum bracket. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-8 The present invention provides a technical solution: a drum-type used sand recovery device, comprising a sand mill 100, a frame 200, and a sand mixing drum device 300. The sand mill 100 is arranged on the top of the frame 200, and the bottom outer wall of the sand mill 100 is fixedly connected to the top outer wall of the frame 200. The sand mixing drum device 300 is arranged inside the frame 200, and the bottom outer wall of the sand mixing drum device 300 is fixedly connected to the bottom of the inner wall of the frame 200. A screen 210 is fixedly connected to the top of the frame 200, and a sand adding device 220 is fixedly connected to the top of the inner wall of the frame 200. The sand mixing drum device 300 includes a drum bracket 350, and the drum bracket 350 is fixedly connected to the inner wall of the frame 200. The frame 350 is welded between the inner walls of the frame 200, the motor 310 is fixedly connected to the side plate of the drum bracket 350, the cylinder guide component 320 is fixedly connected to the outer wall of the drum 330, the cylinder guide component 320 includes a cylinder 321, the bottom of the outer wall of the cylinder 321 is fixedly connected to the outer wall of the drum 330, the outer wall of the cylinder 321 is fixedly connected to a sand adding leak-proof plate 324, one end of the cylinder 321 is fixedly connected to a sand retaining plate 322, the inner walls of both sides of the sand adding leak-proof plate 324 are fixedly connected to guide mounting plates 323, and the bottom of the inner wall of the drum bracket 350 and located below the drum 330 is fixedly connected to a sand receiving leak-proof port 340.

[0031] This embodiment directly recycles the old sand in the sand cleaning station and the printer through the combined arrangement of the sand grinding machine 100, the frame 200, the sand mixing drum device 300 and other devices, and re-mixes the sand for printing. During the old sand recovery process, the agglomerated old sand is crushed into sand particles, which can be directly mixed for use.

[0032] Specifically, a sand pipe 101 and a sand pipe 2 102 are fixedly connected to an outer wall of one side of the sand mill 100, and one end of the sand pipe 101 and the sand pipe 2 102 away from the sand mill 100 is connected to a sand cleaning station and a printer respectively.

[0033] In this embodiment, by setting the sand pipe 1 101 and the sand pipe 2 102, the sand mill 100 can extract a certain amount of old sand from the printer and the sand cleaning station.

[0034] Specifically, the sand adding device 220 includes a lower sand hopper 221, which is welded to the inner wall of the frame 200, and the outer wall of the lower sand hopper 221 is fixedly connected with a curing agent adding pipe 222, and the bottom of the lower sand hopper 221 is welded with a lower sand leakage-proof plate 223, and the lower sand leakage-proof plate 223 is provided with a through hole for placing the curing agent adding pipe 222.

[0035] In this embodiment, the sand adding device 220 is provided to facilitate adding sand and other auxiliary materials into the sand mixing drum device 300 .

[0036] Specifically, a sliding groove for the sand retaining plate 322 to slide is provided in the guide mounting plate 323 , and the sand retaining plate 322 is slidably connected to the guide mounting plate 323 via the sliding groove.

[0037] In this embodiment, the air cylinder 321 pushes the sand retaining plate 322 to move in the guide mounting plate 323 .

[0038] Specifically, a cylinder guide sealing strip 325 is fixedly connected to the bottom of the sand retaining plate 322 .

[0039] In this embodiment, in order to increase the sealing performance of the cylinder guide component 320 , a cylinder guide sealing strip 325 is provided at the place where the sand retaining plate 322 contacts the wall of the drum 220 .

[0040] Specifically, a connecting shaft 331 is fixedly connected to the inner wall of the drum 330 , and the drum 330 is fixedly connected to the output shaft of the motor 310 via the connecting shaft 331 . Stirring baffles 332 are fixedly connected to the outer walls on both sides of the connecting shaft 331 .

[0041] In this embodiment, a stirring baffle 332 is designed inside the drum 330 to play a stirring role during the rotating sand mixing process of the sand mixing drum device 300, so that the sand mixing is more uniform; the stirring baffles 332 are all mechanical mounting parts, which are wear-resistant, not easy to damage, easy to replace, convenient to maintain, and low in maintenance cost.

[0042] A recycling method of a drum-type used sand recycling device comprises the following steps:

[0043] S1. The sand mill 100 extracts a certain amount of old sand from the printer and the sand cleaning station. The sand mill 100 screens the sand inside the remaining sand, and grinds the small lumps into granular sand, and then adds the sand mixing drum 330 device through the screen 210 and the lower sand hopper 221. Before adding sand, the cylinder guide component 320 is rotated and positioned to the bottom of the lower sand hopper 221 through the motor 310 and the encoder, and the lower sand leakage prevention plate 223 is opposite to the sand adding leakage prevention plate 324, and the gap is matched to prevent sand from leaking sideways.

[0044] S2, the cylinder 321 is ventilated to drive the sand baffle 322, the guide mounting plate 323 is guided, the sand adding port is opened, the lower sand hopper 221 is filled with sand, and the curing agent is added at the same time. Since the curing agent remains in the old sand from the sand cleaning station and the printer, but the curing agent has crystallized, the sand is still acidic. During the sand mixing process, the amount of curing agent added is lower than the amount of curing agent added to the new sand, but a certain amount of curing agent still needs to be added.

[0045] S3. After the sand adding is completed, the cylinder 321 drives the sand baffle plate 322 to close along the guide mounting plate 323. The drum 330 rotates at high speed driven by the motor 310. The cylinder guide sealing strip 325 acts as a seal during the rotation process to prevent sand leakage. After the sand is mixed evenly, the motor 310 and the encoder are used to rotate and position the cylinder guide component 320 to be directly above the sand receiving anti-leakage port 340. The sand receiving anti-leakage port 340 is directly opposite to the sand adding anti-leakage plate 324, and the clearance is matched.

[0046] S4, the cylinder 321 drives the sand baffle plate 322 to open along the guide mounting plate 321, and the sand enters the sand storage container through the sand receiving and leak-proof opening 340, and the above actions are repeated in this cycle.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A drum-type waste sand recovery device, comprising a sand mill (100), a frame (200), and a sand mixing drum device (300), characterized in that: The sand mill (100) is arranged on the top of the frame (200), the bottom outer wall of the sand mill (100) is fixedly connected to the top outer wall of the frame (200), the sand mixing drum device (300) is arranged inside the frame (200), the bottom outer wall of the sand mixing drum device (300) is fixedly connected to the bottom of the inner wall of the frame (200), the top of the frame (200) is fixedly connected with a screen (210), and the top of the inner wall of the frame (200) is fixedly connected with a sand adding device (220); The sand mixing drum device (300) comprises a drum bracket (350), the drum bracket (350) is welded between the inner walls of the frame (200), a motor (310) is fixedly connected to the side plate of the drum bracket (350), a cylinder guide component (320) is fixedly connected to the outer wall of the drum (330), the cylinder guide component (320) comprises a cylinder (321), the outer wall bottom of the cylinder (321) is fixedly connected to the outer wall of the drum (330), a sand adding leak-proof plate (324) is fixedly connected to the outer wall of the cylinder (321), one end of the cylinder (321) is fixedly connected to a sand retaining plate (322), the inner walls of both sides of the sand adding leak-proof plate (324) are fixedly connected to guide mounting plates (323), and a sand receiving leak-proof port (340) is fixedly connected to the inner wall bottom of the drum bracket (350) and located below the drum (330); One side outer wall of the sand mill (100) is fixedly connected with a sand pipe 1 (101) and a sand pipe 2 (102), and one end of the sand pipe 1 (101) and the sand pipe 2 (102) away from the sand mill (100) is connected to a sand cleaning station and a printer respectively; The sand adding device (220) comprises a lower sand hopper (221), the lower sand hopper (221) is welded to the inner wall of the frame (200), a curing agent adding pipe (222) is fixedly connected to the outer wall of the lower sand hopper (221), a lower sand leakage prevention plate (223) is welded to the bottom of the lower sand hopper (221), and a through hole for placing the curing agent adding pipe (222) is opened on the lower sand leakage prevention plate (223).

2. The drum-type used sand recovery device according to claim 1, characterized in that: A sliding groove for the sand retaining plate (322) to slide is provided in the guide mounting plate (323), and the sand retaining plate (322) is slidably connected to the guide mounting plate (323) via the sliding groove.

3. The drum-type used sand recovery device according to claim 1, characterized in that: The bottom of the sand retaining plate (322) is fixedly connected to a cylinder guide sealing strip (325).

4. The drum-type used sand recovery device according to claim 1, characterized in that: The inner wall of the drum (330) is fixedly connected to a connecting shaft (331), and the drum (330) is fixedly connected to the output shaft of the motor (310) via the connecting shaft (331). Stirring partitions (332) are fixedly connected to the outer walls on both sides of the connecting shaft (331).

5. A drum-type used sand recovery device according to any one of claims 1 to 4, characterized in that: A recycling method of a drum-type used sand recycling device comprises the following steps: S1, the sand mill (100) extracts a certain amount of old sand from the printer and the sand cleaning station, the sand mill (100) screens the sand inside the remaining sand, and grinds the small lumps into granular sand, and then adds the sand to the sand mixing drum 330 device through the screen (210) and the lower sand hopper (221). Before adding the sand, the cylinder guide component (320) is rotated and positioned to the bottom of the lower sand hopper (221) by the motor (310) and the encoder, and the lower sand leakage prevention plate (223) and the sand adding leakage prevention plate (324) are aligned with each other, and the clearance is matched to prevent the sand from leaking sideways; S2, the air cylinder (321) drives the sand baffle (322) through ventilation, the guide mounting plate (323) guides, the sand adding port is opened, the lower sand hopper (221) adds sand, and at the same time, a curing agent is added. Since the curing agent remains in the old sand from the sand cleaning station and the printer, but the curing agent has crystallized, the sand is still acidic. During the sand mixing process, the amount of curing agent added is lower than the amount of curing agent added to the new sand, but a certain amount of curing agent still needs to be added; S3. After the sand addition is completed, the cylinder (321) drives the sand retaining plate (322) to close along the guide mounting plate (323). The roller (330) rotates at high speed under the drive of the motor (310). The cylinder guide sealing strip (325) plays a sealing role during the rotation process to prevent sand leakage. After the sand is mixed evenly, the motor (310) and the encoder rotate the cylinder guide component (320) to the position directly above the sand receiving anti-leakage port (340). The sand receiving anti-leakage port (340) is aligned with the sand adding anti-leakage plate (324) with clearance fit. S4, the cylinder (321) drives the sand retaining plate (322) to open along the guide mounting plate (323), and the sand enters the sand storage container through the sand receiving and leak-proof opening (340), and the above actions are repeated in this cycle.

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