Automatic sand mixing device for hardware casting

Abstract

The invention relates to the field of sand mixing equipment, in particular to an automatic sand mixing device for hardware casting, which comprises a sand mixer, the sand mixer comprises a machine body, and a middle mixing assembly, an edge mixing assembly and a material leading-out assembly are arranged in the machine body; the middle mixing assembly is used for mixing the molding material in the middle; the edge part mixing assembly is used for mixing molding materials at the edge part; the material guiding-out assembly is used for guiding out the mixed molding material; according to the sand mixer, through cooperative operation of the main scraping plates, the auxiliary scraping plates, the raking claws and the stirring blades, a three-dimensional mixing system is constructed, molding materials can be treated from the bottom to the edge without dead corners, and compared with a single stirring mode of a traditional sand mixer, the sand mixer has the advantages that the stirring efficiency is greatly improved, and the production cost is reduced. The mixing efficiency is remarkably improved, various molding materials can be uniformly blended, and molding sand with stable performance is provided for casting.

Description

Technical Field

[0001] The present invention relates to the field of sand mixing equipment, and particularly to an automatic sand mixing device for the casting of hardware parts. Background Art

[0002] In the casting industry, the sand mixer is the core equipment for preparing molding sand. However, there are many pain points in the existing technology. Traditional sand mixers such as roller type and swing wheel type have a single stirring structure, which is difficult to mix the molding materials comprehensively, easily resulting in insufficient mixing of the materials at the bottom and edges of the sand mold, uneven properties of the molding sand, and thus defects such as pores and sand inclusions in the castings. At the same time, the feeding mode of traditional equipment is fixed and cannot flexibly adjust the feeding sequence and ratio according to the requirements of different sand mold processes, greatly limiting the flexibility and adaptability of production. In the discharging link, there is a lack of an effective cleaning mechanism, and the molding materials are easily adhered to the stirring components, requiring frequent manual cleaning, which not only reduces production efficiency but also increases labor intensity and labor costs. In addition, the existing sand mixers have a low degree of automation and require a lot of manual intervention, making it difficult to ensure the stability of product quality and unable to meet the requirements of modern casting industry for high-efficiency and high-quality production. Therefore, we propose an automatic sand mixing device for the casting of hardware parts to solve the above-mentioned problems. Summary of the Invention

[0003] The purpose of the present invention is to solve the disadvantages existing in the background art, and to propose an automatic sand mixing device for the casting of hardware parts.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is: an automatic sand mixing device for the casting of hardware parts, including a sand mixer, the sand mixer includes a machine body, and a middle mixing component, a side mixing component and a material discharging component are arranged inside the machine body; The middle mixing component is used for mixing the molding materials in the middle; The side mixing component is used for mixing the molding materials at the sides; The material discharging component is used for discharging the mixed molding materials; The middle mixing component includes a rotating base, a plurality of main scraping plates are fixedly connected to the lower part of the outer periphery of the rotating base, a mounting frame is installed on the upper part of the outer periphery of the rotating base, a plurality of auxiliary scraping plates are fixedly connected to the bottom of the mounting frame, the auxiliary scraping plates and the main scraping plates are alternately distributed, a fixed seat is fixedly connected to one side of the top of each main scraping plate far away from the rotating base, a fixed rod is fixedly connected to the middle of one end of each fixed seat, the other end of each fixed rod is fixedly connected to the middle of the outer periphery of the rotating base, a rotating sleeve is rotatably connected to the outer periphery of each fixed rod, a rake claw is fixedly connected to the bottom of the outer periphery of each rotating sleeve, and a part of the rotating sleeves are connected to the fixed rods through torsion springs inside; The side mixing assembly includes multiple groups of stirring paddle groups. Each group of stirring paddle groups includes two stirring paddles, upper and lower. The stirring paddles are all arranged on the inner side of the side of the machine body, and a cavity is formed inside the side wall of the machine body.

[0005] Preferably, the side mixing assembly further includes a swivel ring. Ring tooth grooves are formed in the middle of the outer periphery of the swivel ring. Gears are meshed and connected to the outer periphery of the ring tooth grooves. Shafts I are fixedly connected to the middle of the gears. The shafts I are rotatably installed in the lower part of the cavity of the side wall of the machine body through fixing blocks. Tooth columns I are fixedly connected to the upper part of the outer periphery of the shafts I. Tooth disks I are meshed and connected to one side of the tooth columns I. Telescopic sleeves I are fixedly connected to the middle of the tooth disks I. The telescopic sleeves I all penetrate the side wall of the machine body, and the telescopic sleeves I are rotatably connected to the machine body.

[0006] Preferably, tooth columns II are meshed and connected to one side of the upper part of the tooth disks I. Shafts II are fixedly connected to the middle of the tooth columns II. The shafts II are rotatably installed in the upper part of the cavity of the side wall of the machine body through fixing blocks. Tooth columns III are fixedly connected to the upper part of the outer periphery of the shafts II. Tooth disks II are meshed and connected to one side of the tooth columns III. Telescopic sleeves II are installed in the middle of the tooth disks II. The telescopic sleeves II all penetrate the side wall of the machine body, and the telescopic sleeves II are rotatably connected to the machine body. Stirring paddles are installed on the outer periphery of the telescopic ends of the telescopic sleeves II and the telescopic sleeves I.

[0007] Preferably, reciprocating thread grooves are formed in the lower part of the outer periphery of the shafts I. Lifting sleeves are connected to the lower part of the outer periphery of the shafts I through the reciprocating thread grooves. The lower part of the lifting sleeves is slidably connected to a limit frame. The limit frame is installed inside the cavity of the side wall of the machine body. Piston disks are fixedly connected to the bottoms of the lifting sleeves. Piston cylinders are arranged at the lower parts of the lifting sleeves. The piston cylinders are fixedly connected to the inner bottom of the cavity of the side wall of the machine body. The piston disks are slidably connected inside the piston cylinders.

[0008] Preferably, the material discharging assembly includes a discharging flap. The discharging flap is connected to one side of the bottom of the machine body through a hinge. An electric push rod is rotatably connected to the bottom of the discharging flap. The end of the electric push rod away from the discharging flap is rotatably connected to a fixing frame. The fixing frame is fixedly connected to one side of the middle of the bottom end of the machine body. A material guiding frame is arranged below the discharging flap. The material guiding frame is arranged in an inclined state.

[0009] Preferably, a servo motor is installed in the middle of the bottom end of the machine body, and uniformly distributed supporting feet are fixedly connected to the outside of the bottom end of the machine body.

[0010] Preferably, connecting pipes are installed on one side of the bottom of the piston cylinders. One ends of the connecting pipes away from the piston cylinders are installed with a conduit I and a conduit II through a three-way joint.

[0011] Preferably, the ends of the fixing seats are fixedly connected to the inner side of the rotating ring, and the rotating ring is rotatably connected to the lower part of the inner side wall of the machine body.

[0012] Preferably, one end of the catheter 1 away from the connecting pipe is connected to the telescopic sleeve 1 through a rotating joint, and one end of the catheter 1 away from the connecting pipe is connected to the telescopic sleeve 2 through a rotating joint.

[0013] Preferably, the first and second conduits are both arranged on the inner side of the side bins, and the side bins are both fixedly connected to the outer periphery of the body.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention constructs a three-dimensional mixing system through the coordinated operation of the main scraper, auxiliary scraper, rake claws and stirring blades. The main and auxiliary scrapers achieve comprehensive coverage and mixing of the bottom modeling materials in the machine body. The rake claws deflect under the resistance of the modeling materials to further enhance the stirring effect. The upper and lower stirring blades rotate in coordination to process the modeling materials from the bottom to the edge without dead angles. Compared with the single stirring method of traditional sand mixers, the mixing efficiency of the present invention is significantly improved, which can ensure that various modeling materials are evenly blended, and provide stable performance molding sand for casting.

[0015] The present invention aims at the problem of edge accumulation of modeling materials which is difficult to solve in traditional sand mixers. Through the rotation and telescopic design of the stirring blades, dynamic processing of the edge materials in the machine body is achieved. The stirring blades can fully stir the edge materials when rotating, and the telescopic function can push the accumulated materials under the action of centrifugal force to the middle scraper, which not only avoids the local concentration of materials affecting the mixing effect, but also prevents the spilling problem caused by excessive edge accumulation, thereby ensuring that the sand mixing process is efficient and stable, and improving the sand mixing quality and the cleanliness of the production environment.

[0016] The present invention is different from the traditional sand mixer discharging method. It adopts an electric push rod to control the discharging flap to realize automatic opening and closing of the discharging port. Under the continuous pushing of the scraper, the mixed modeling material is smoothly discharged. At the same time, the rake claws and the stirring blades play a unique role in the discharging process. The rake claws droop and impact to shake off the residual materials on the scraper, and the stirring blades move horizontally to scrape off their own attachments, which effectively avoids material residue and ensures thorough discharging, greatly improves the discharging efficiency, and reduces the manual cleaning cost and labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a front view stereoscopic structural schematic diagram of an automatic sand mixing device for hardware casting according to the present invention; Figure 2 It is a top view schematic diagram of the internal structure of an automatic sand mixing device for hardware casting according to the present invention; Figure 3 It is a schematic diagram of a partial structure of an automatic sand mixing device for hardware casting according to the present invention, viewed from above; Figure 4 The sectional view of the internal structure of an automatic sand mixing device for hardware casting according to the present invention; Figure 5 The partial structure diagram of the stirring paddle of an automatic sand mixing device for hardware casting according to the present invention; Figure 6 The partial structure diagram of a first gear disk of an automatic sand mixing device for hardware casting according to the present invention; Figure 7 is Figure 5 The enlarged view at position A in

[0018] 1. Sand mixer; 101. Machine body; 102. Side bin; 103. Support feet; 104. Feeding guide frame; 105. Rotating base; 106. Discharge flap; 107. Stirring paddle; 108. Rotating ring; 109. Fixed seat; 110. Fixed rod; 111. Sub-scraper; 112. Main scraper; 113. Electric push rod; 114. Fixed frame; 115. Servo motor; 116. Connecting pipe; 117. Second gear disk; 118. Piston cylinder; 119. Ring tooth groove; 120. Second tooth column; 121. Second rotating shaft; 122. Rotating sleeve; 123. Rake claw; 124. Mounting frame; 125. Second telescopic sleeve; 126. Third tooth column; 127. Piston disk; 128. First tooth column; 129. First gear disk; 130. First conduit; 131. Second conduit; 132. Lifting sleeve; 133. Limiting frame; 134. Gear; 135. First telescopic sleeve; 136. First rotating shaft. Detailed implementation manners

[0019] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations.

[0020] As Figures 1-7 shown, an automatic sand mixing device for hardware casting includes a sand mixer 1. The sand mixer 1 includes a machine body 101. A servo motor 115 is installed in the middle of the bottom end of the machine body 101, and uniformly distributed support feet 103 are fixedly connected to the outer side of the bottom end of the machine body 101; The middle mixing assembly is used for mixing the molding materials in the middle; The side mixing assembly is used for mixing the molding materials at the sides; The material discharging assembly is used for discharging the mixed molding materials; The middle mixing assembly includes a turntable 105. A plurality of main scrapers 112 are fixedly connected to the lower part of the outer periphery of the turntable 105. An installation frame 124 is installed on the upper part of the outer periphery of the turntable 105. A plurality of auxiliary scrapers 111 are fixedly connected to the bottom of the installation frame 124. The auxiliary scrapers 111 and the main scrapers 112 are alternately distributed. On one side of the top of the main scraper 112 far from the turntable 105, a fixing seat 109 is fixedly connected. In the middle of one end of the fixing seat 109, a fixing rod 110 is fixedly connected. The other end of the fixing rod 110 is fixedly connected to the middle part of the outer periphery of the turntable 105. A rotating sleeve 122 is rotatably connected to the outer periphery of the fixing rod 110. A harrow claw 123 is fixedly connected to the bottom of the outer periphery of the rotating sleeve 122. The inside of some of the rotating sleeves 122 is connected to the fixing rod 110 through a coil spring. The ends of the fixing seats 109 are fixedly connected to the inside of the rotating ring 108. The rotating ring 108 is rotatably connected to the lower part of the inner side wall of the machine body 101. A middle mixing assembly, a side mixing assembly and a material discharging assembly are arranged inside the machine body 101; Further, in specific implementation, people can use the sand mixer 1 to fully mix and blend various molding materials such as green sand, clay, water, etc. When performing sand mixing work, people can first start the sand mixer 1 and then add various molding materials into the sand mixer 1 in sequence according to the sand mold mixing requirements. The work of the servo motor 115 can drive the turntable 105 to rotate. The turntable 105 can drive each main scraper 112 and the installation frame 124 to rotate synchronously. The mixing of the molding materials at the bottom inside the machine body 101 can be realized through each auxiliary scraper 111 fixed to the outside of the main scraper 112 and the installation frame 124. The auxiliary scraper 111 can cooperate with the main scraper 112 to achieve non-dead-angle contact with the bottom inside the machine body 101, so as to fully mix and blend various molding materials. When the main scraper 112 rotates, it will continuously contact the molding materials. Under the resistance of the molding materials, the harrow claw 123 will show hysteresis, resulting in the deflection of the harrow claw 123 and the rotating sleeve 122 on the fixing rod 110. The harrow claw 123 can further mix the molding materials, which is beneficial to actual use; Further, in specific implementation, during the discharging process, as the molding material inside the machine body 101 gradually decreases, the rake claws 123 can gradually droop, so that the rake claws 123 will continuously contact the molding material. When the molding material is basically discharged, under the action of the coil springs inside some of the rotating sleeves 122, the rake claws 123 in this part will be quickly retracted, so that the bottom of the rake claws 123 in this part will impact one side of the main scraper 112, causing the main scraper 112 to vibrate. Thus, part of the molding material adhering to the main scraper 112 can be shaken off through the instantaneous strong vibration, facilitating the discharging work of the sand mixer 1. During the vibration of the main scraper 112, the rake claws 123 in the other rotating sleeves 122 without coil springs will be vibrated up, so that the rake claws 123 in this part can swing up and continue to vibrate the main scraper 112 at a small frequency, which is beneficial to the continuous discharging work. During discharging, through the lateral movement of the upper and lower stirring blades 107, the molding material adhering to the stirring blades 107 can be removed, which is beneficial to actual use.

[0021] Among them, the side mixing assembly includes multiple groups of stirring blades 107. Each group of stirring blades 107 includes two stirring blades 107, the upper and the lower. The stirring blades 107 are all arranged on the inner side edges of the machine body 101. A cavity is formed inside the side wall of the machine body 101. The side mixing assembly further includes a rotating ring 108. Ring tooth grooves 119 are formed in the middle of the outer periphery of the rotating ring 108. Gear 134 is meshed and connected to the outer periphery of each ring tooth groove 119. A first rotating shaft 136 is fixedly connected to the middle of each gear 134. The first rotating shafts 136 are all rotatably installed in the lower part of the cavity of the side wall of the machine body 101 through fixing blocks. A first tooth column 128 is fixedly connected to the upper part of the outer periphery of each first rotating shaft 136. A first tooth disc 129 is meshed and connected to one side of each first tooth column 128. A first telescopic sleeve 135 is fixedly connected to the middle of each first tooth disc 129. The first telescopic sleeves 135 all penetrate through the side wall of the machine body 101 and are rotatably connected to the machine body 101. A second tooth column 120 is meshed and connected to one side of the upper part of each first tooth disc 129. A second rotating shaft 121 is fixedly connected to the middle of each second tooth column 120. The second rotating shafts 121 are all rotatably installed in the upper part of the cavity of the side wall of the machine body 101 through fixing blocks. A third tooth column 126 is fixedly connected to the upper part of the outer periphery of each second rotating shaft 121. A second tooth disc 117 is meshed and connected to one side of each third tooth column 126. A second telescopic sleeve 125 is installed in the middle of each second tooth disc 117. The second telescopic sleeves 125 all penetrate through the side wall of the machine body 101 and are rotatably connected to the machine body 101. Stirring blades 107 are installed on the outer peripheries of the telescopic ends of the second telescopic sleeves 125 and the first telescopic sleeves 135; Further, in specific implementation, the fixed seat 109 at the end of the main scraper 112 can drive the rotating ring 108 to rotate synchronously. The annular tooth groove 119 formed on the outer periphery of the rotating ring 108 can drive each gear 134 meshing with it to rotate, thereby driving the first rotating shaft 136 to rotate. When the first rotating shaft 136 rotates, it will drive the first tooth column 128 at the upper part to drive the first tooth disc 129 to rotate. Further, it will drive the second tooth column 120 meshing with the upper part of the first tooth disc 129 to rotate synchronously, thereby driving the third tooth column 126 coaxial with the second tooth column 120 to rotate. The third tooth column 126 will drive the second tooth disc 117 to rotate. The second tooth disc 117 and the first tooth disc 129 can drive the upper and lower second telescopic sleeves 125 and the first telescopic sleeves 135 to rotate synchronously. The stirring blades 107 installed at the ends of the second telescopic sleeves 125 and the first telescopic sleeves 135 can realize the agitation and mixing of the molding materials at the inner edge of the machine body 101, which is beneficial to actual use.

[0022] Wherein, reciprocating thread grooves are formed on the lower parts of the outer peripheries of the first rotating shafts 136. The lower parts of the outer peripheries of the first rotating shafts 136 are connected with lifting sleeves 132 through the reciprocating thread grooves. The lower parts of the lifting sleeves 132 are slidably connected with limit frames 133. The limit frames 133 are installed inside the side wall cavities of the machine body 101. Piston discs 127 are fixedly connected to the bottoms of the lifting sleeves 132. Piston cylinders 118 are arranged at the lower parts of the lifting sleeves 132. The piston cylinders 118 are fixedly connected to the inner bottoms of the side wall cavities of the machine body 101. The piston discs 127 are slidably connected inside the piston cylinders 118. One sides of the bottoms of the piston cylinders 118 are all provided with connecting pipes 116. One ends of the connecting pipes 116 far away from the piston cylinders 118 are all installed with a first conduit 130 and a second conduit 131 through three-way connectors. One ends of the first conduits 130 far away from the connecting pipes 116 are all connected with the first telescopic sleeves 135 through rotary joints. One ends of the first conduits 130 far away from the connecting pipes 116 are all connected with the second telescopic sleeves 125 through rotary joints. The first conduits 130 and the second conduits 131 are all arranged inside the side bins 102. The side bins 102 are all fixedly connected to the outer peripheries of the machine body 101; Further, in specific implementation, when the first rotating shaft 136 rotates, it drives the lifting sleeve 132 to move up and down through the reciprocating thread groove at the lower part of its outer circumference. The piston disk 127 installed at the bottom of the lifting sleeve 132 can perform continuous piston motion inside the piston cylinder 118, thereby driving the liquid inside the piston cylinder 118 to flow along the connecting pipe 116, realizing the continuous derivation and pumping of the liquid inside the piston cylinder 118. Under the connection of the first conduit 130 and the second conduit 131, the liquid will enter the second telescopic sleeve 125 and the first telescopic sleeve 135 respectively. Under the action of the front part of the piston cylinder 118, the second telescopic sleeve 125 and the first telescopic sleeve 135 will perform continuous telescoping, so that the stirring paddle 107 will move horizontally inside the machine body 101, realizing an increase in the influence range of the stirring paddle 107, and being able to push down the molding material piled up at the inner edge of the machine body 101 under the action of centrifugal force during this process, so that the molding material can contact the auxiliary scraper 111 and the main scraper 112 in the middle part of the machine body 101, avoiding the situation that the molding material is locally concentrated inside the machine body 101 resulting in the incomplete exertion of the mixing effect, and at the same time being able to avoid the situation that part of the molding material continues to pile up at the edge and is prone to spilling later, which is beneficial to the continuous mixing work of more molding materials. When the molding material mixing is completed, people can further start the electric push rod 113.

[0023] Among them, the material export component includes a discharge flap 106. The discharge flap 106 is connected to one side of the bottom of the machine body 101 through a hinge. A bottom of the discharge flap 106 is rotatably connected to an electric push rod 113. One end of the electric push rod 113 away from the discharge flap 106 is rotatably connected to a fixing frame 114. The fixing frame 114 is fixedly connected to one side of the middle part of the bottom end of the machine body 101. A guiding frame 104 is arranged below the discharge flap 106. The guiding frame 104 is arranged in an inclined state. Further, in specific implementation, the contraction of the electric push rod 113 can drive the discharge flap 106 to turn over, thereby enabling the discharge port. At this time, under the continuous operation of the auxiliary scraper 111 and the main scraper 112, the molding material inside the machine body 101 will be continuously pushed to the discharge port, so as to realize the export of the mixed molding material. The exported molding material will fall onto the guiding frame 104, and the guiding frame 104 can further guide the molding material. The electric push rod 113 can realize the automatic closing of the discharge port.

[0024] Working principle: In actual use, people can achieve the full mixing of various molding materials such as raw sand, clay, water, etc. through the muller 1. When carrying out the sand mixing work, people can first start the muller 1 and then add various molding materials into the muller 1 in sequence according to the sand mold mixing requirements. Through the work of the servo motor 115, the turntable 105 can be driven to rotate. Through the turntable 105, each main scraper 112 and the mounting frame 124 can be driven to rotate synchronously. Through the main scraper 112 and each auxiliary scraper 111 fixed on the outer side of the mounting frame 124, the mixing of the molding materials at the bottom inside the machine body 101 can be realized. Through the auxiliary scraper 111, it can cooperate with the main scraper 112 to achieve a dead - angle - free contact with the bottom inside the machine body 101, so as to fully mix various molding materials. When the main scraper 112 rotates, it will continuously contact the molding materials. Under the resistance of the molding materials, the rake claw 123 will show hysteresis, resulting in the deflection of the rake claw 123 and the rotating sleeve 122 on the fixed rod 110. Through the rake claw 123, the molding materials can be further mixed, which is beneficial to actual use. During this process, through the fixed seat 109 at the end of the main scraper 112, the rotating ring 108 can be driven to rotate synchronously. Through the ring tooth groove 119 opened on the outer circumference of the rotating ring 108, each gear 134 meshing with it can be driven to rotate, so as to drive the rotating shaft one 136 to rotate. When the rotating shaft one 136 rotates, it will drive the tooth disk one 129 to rotate through the tooth column one 128 at the upper part. Further, the tooth column two 120 meshing with the upper part of the tooth disk one 129 will be driven to rotate synchronously, so as to drive the tooth column three 126 coaxial with the tooth column two 120 to rotate. Through the tooth column three 126, the tooth disk two 117 will be driven to rotate. Through the tooth disk two 117 and the tooth disk one 129, the upper and lower telescopic sleeves two 125 and the telescopic sleeve one 135 can be driven to rotate synchronously. Through the stirring blades 107 installed at the ends of the telescopic sleeve two 125 and the telescopic sleeve one 135, the stirring and mixing of the molding materials at the inner edge of the machine body 101 can be realized, which is beneficial to actual use. During this process, when the rotating shaft one 136 rotates, it will drive the lifting sleeve 132 to move up and down through the reciprocating thread groove at the lower part of its outer circumference. Through the piston disk 127 installed at the bottom of the lifting sleeve 132, continuous piston movement can be carried out inside the piston cylinder 118, so as to drive the liquid inside the piston cylinder 118 to flow along the connecting pipe 116, realizing the continuous derivation and pumping of the liquid inside the piston cylinder 118. Under the connection of the conduit one 130 and the conduit two 131, the liquid will enter the telescopic sleeve two 125 and the telescopic sleeve one 135 respectively. Under the action of the front - end part of the piston cylinder 118, the telescopic sleeve two 125 and the telescopic sleeve one 135 will be continuously telescoped, so that the stirring blade 107 will move horizontally inside the machine body 101, realizing an increase in the influence range of the stirring blade 107, and the molding materials piled up at the inner edge of the machine body 101 under the action of centrifugal force can be pushed down during this process.Enable the molding material to come into contact with the auxiliary scraper 111 and the main scraper 112 in the middle of the machine body 101, avoiding the situation where the molding material accumulates locally inside the machine body 101, resulting in the incomplete exertion of the mixing effect. At the same time, it can avoid the situation where some molding materials continuously pile up at the edge, leading to easy spillage in the follow-up. This is beneficial to the continuous mixing of a large amount of molding materials. When the mixing of the molding materials is completed, people can further start the electric push rod 113. The contraction of the electric push rod 113 can drive the discharge flap 106 to flip, thereby enabling the discharge port. At this time, under the continuous operation of the auxiliary scraper 111 and the main scraper 112, the molding materials inside the machine body 101 will be continuously pushed to the discharge port, so as to realize the discharge of the mixed molding materials. The discharged molding materials will fall onto the material guiding frame 104, and the material guiding frame 104 can further guide the molding materials. The automatic closing of the discharge port can be achieved through the electric push rod 113. During the discharging process, as the molding materials inside the machine body 101 gradually decrease, the rake claws 123 can gradually droop, so that the rake claws 123 will continuously contact the molding materials. When the molding materials are basically discharged, under the action of the coil springs inside some of the rotating sleeves 122, the rake claws 123 of this part will be quickly retracted, causing the bottom of the rake claws 123 of this part to hit one side of the main scraper 112, making the main scraper 112 vibrate. Thus, some of the molding materials adhered to the main scraper 112 can be shaken off through the instantaneous strong vibration, facilitating the discharging work of the sand mixer 1. During the vibration of the main scraper 112, the rake claws 123 in the other part of the rotating sleeves 122 without coil springs will be vibrated up, so that the rake claws 123 of this part can swing up and continue to vibrate the main scraper 112 at a small frequency, which is beneficial to the continuous discharging work. During discharging, through the lateral movement of the upper and lower stirring blades 107, the molding materials adhered to the stirring blades 107 can be removed, which is beneficial to actual use.

[0025] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection required by the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic sand mixing device for hardware casting, comprising a sand mixer (1), characterized in that: The sand mixer (1) comprises a machine body (101), wherein a middle mixing component, a side mixing component and a material outlet component are arranged inside the machine body (101); The middle mixing assembly is used to mix the modeling material in the middle; The edge mixing assembly is used to mix the modeling material of the edge; The material export component is used to export the mixed modeling material; The middle mixing assembly comprises a rotating seat (105), a plurality of main scrapers (112) are fixedly connected to the lower portion of the outer periphery of the rotating seat (105), a mounting frame (124) is installed on the upper portion of the outer periphery of the rotating seat (105), a plurality of auxiliary scrapers (111) are fixedly connected to the bottom of the mounting frame (124), the auxiliary scrapers (111) are alternately distributed with the main scrapers (112), and the top of the main scrapers (112) away from the rotating seat (105) is fixedly connected to a fixed A seat (109), wherein a fixed rod (110) is fixedly connected to the middle of one end of the fixed seat (109), the other end of the fixed rod (110) is fixedly connected to the middle of the outer periphery of the rotating seat (105), the outer periphery of the fixed rod (110) is rotatably connected to a rotating sleeve (122), the outer periphery bottom of the rotating sleeve (122) is fixedly connected to a rake claw (123), and the interior of a part of the rotating sleeve (122) is connected to the fixed rod (110) via a coil spring; The edge mixing assembly comprises a plurality of groups of stirring blades (107), each group of the stirring blades (107) comprising two upper and lower stirring blades (107), the stirring blades (107) being arranged on the inner side edge of the machine body (101), and a cavity being provided inside the side wall of the machine body (101).

2. The automatic sand mixing device for hardware casting according to claim 1 is characterized in that: The edge mixing assembly further comprises a rotating ring (108), wherein an annular tooth groove (119) is provided in the middle of the outer circumference of the rotating ring (108), wherein the outer circumference of the annular tooth groove (119) is meshedly connected with a gear (134), wherein the middle of the gear (134) is fixedly connected with a rotating shaft (136), wherein the rotating shaft (136) is rotatably mounted in the lower part of the side wall cavity of the machine body (101) via a fixed block, wherein the outer circumference of the rotating shaft (136) is fixedly connected with a tooth column (128), wherein one side of the tooth column (128) is meshedly connected with a tooth disk (129), wherein the middle of the tooth disk (129) is fixedly connected with a telescopic sleeve (135), wherein the telescopic sleeve (135) passes through the side wall of the machine body (101), and wherein the telescopic sleeve (135) is rotatably connected to the machine body (101).

3. The automatic sand mixing device for hardware casting according to claim 2 is characterized in that: One side of the upper part of the toothed disc 1 (129) is meshedly connected with a toothed column 2 (120), the middle part of the toothed column 2 (120) is fixedly connected with a rotating shaft 2 (121), the rotating shaft 2 (121) is rotatably mounted on the upper part of the side wall cavity of the machine body (101) through a fixed block, the upper part of the outer periphery of the rotating shaft 2 (121) is fixedly connected with a toothed column 3 (126), one side of the toothed column 3 (126) is meshedly connected with a toothed disc 2 (117), the middle part of the toothed disc 2 (117) is installed with a telescopic sleeve 2 (125), the telescopic sleeve 2 (125) passes through the side wall of the machine body (101), the telescopic sleeve 2 (125) is rotatably connected to the machine body (101), and stirring blades (107) are installed on the outer peripheries of the telescopic ends of the telescopic sleeve 2 (125) and the telescopic sleeve 1 (135).

4. The automatic sand mixing device for hardware casting according to claim 3 is characterized in that: The lower portion of the outer circumference of the rotating shaft (136) is provided with a reciprocating thread groove, and the lower portion of the outer circumference of the rotating shaft (136) is connected to a lifting sleeve (132) via the reciprocating thread groove. The lower portion of the lifting sleeve (132) is slidably connected to a limiting frame (133), and the limiting frame (133) is installed inside the side wall cavity of the machine body (101). The bottom of the lifting sleeve (132) is fixedly connected to a piston disk (127), and the lower portion of the lifting sleeve (132) is provided with a piston cylinder (118), and the piston cylinder (118) is fixedly connected to the bottom of the side wall cavity of the machine body (101), and the piston disk (127) is slidably connected inside the piston cylinder (118).

5. The automatic sand mixing device for hardware casting according to claim 1 is characterized in that: The material discharge assembly comprises a discharge flap (106), the discharge flap (106) being connected to one side of the bottom of the machine body (101) via a hinge, the bottom of the discharge flap (106) being rotatably connected to an electric push rod (113), one end of the electric push rod (113) away from the discharge flap (106) being rotatably connected to a fixing frame (114), the fixing frame (114) being fixedly connected to one side of the middle part of the bottom end of the machine body (101), a material guide frame (104) being arranged at the lower part of the discharge flap (106), the material guide frame (104) being arranged in an inclined state.

6. The automatic sand mixing device for hardware casting according to claim 1 is characterized in that: A servo motor (115) is installed in the middle of the bottom end of the machine body (101), and evenly distributed supporting feet (103) are fixedly connected to the outer side of the bottom end of the machine body (101).

7. The automatic sand mixing device for hardware casting according to claim 4 is characterized in that: A connecting pipe (116) is installed on one side of the bottom of the piston cylinder (118), and a first conduit (130) and a second conduit (131) are installed on one end of the connecting pipe (116) away from the piston cylinder (118) via a three-way connector.

8. The automatic sand mixing device for hardware casting according to claim 1 is characterized in that: The ends of the fixing seat (109) are fixedly connected to the inner side of the rotating ring (108), and the rotating ring (108) is rotatably connected to the lower part of the inner wall of the machine body (101).

9. The automatic sand mixing device for hardware casting according to claim 7 is characterized in that: One end of the conduit 1 (130) away from the connecting pipe (116) is connected to the telescopic sleeve 1 (135) via a rotating joint, and one end of the conduit 1 (130) away from the connecting pipe (116) is connected to the telescopic sleeve 2 (125) via a rotating joint.

10. The automatic sand mixing device for hardware casting according to claim 9, characterized in that: The first conduit (130) and the second conduit (131) are both arranged on the inner side of the side bin (102), and the side bin (102) is fixedly connected to the outer periphery of the machine body (101).

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