An automatic sand mixing device for hardware casting

Abstract

The present invention relates to the field of sand mixing equipment, and in particular to an automatic sand mixing device for hardware casting, comprising a sand mixer, the sand mixer comprising a body, wherein a middle mixing component, a side mixing component and a material outlet component are arranged inside the body; the middle mixing component is used to mix the molding material in the middle; the side mixing component is used to mix the molding material at the side; the material outlet component is used to outlet the mixed molding material; the middle mixing component comprises a swivel seat, and a plurality of main scrapers are fixedly connected to the lower part of the outer periphery of the swivel seat. The present invention constructs a three-dimensional mixing system through the coordinated operation of the main scraper, the auxiliary scraper, the rake claw and the stirring blade, which can process the molding material from the bottom to the edge without dead angles. Compared with the single stirring mode of the traditional sand mixer, the mixing efficiency of this invention is significantly improved, and it can ensure that various molding materials are evenly blended, providing stable performance molding sand for casting.

Description

Technical Field

[0001] The invention relates to the field of sand mixing equipment, in particular to an automatic sand mixing device for hardware casting. Background Art

[0002] In the foundry industry, sand mixers are the core equipment for preparing molding sand, but the existing technology has many pain points. Traditional sand mixers, such as the grinding wheel type and the pendulum wheel type, have a single stirring structure, which makes it difficult to mix the molding materials in all directions, easily leading to insufficient mixing of the materials at the bottom and sides of the sand mold, resulting in uneven molding sand performance, and then causing defects such as pores and sand holes in the castings. At the same time, the traditional equipment has a fixed feeding mode and cannot flexibly adjust the feeding sequence and ratio according to different sand mold process requirements, which greatly limits the flexibility and adaptability of production. In the discharging link, there is a lack of an effective cleaning mechanism, and the molding materials are easy to adhere to the stirring parts, 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 modern foundry industry's demand for efficient and high-quality production. Therefore, we propose an automatic sand mixing device for hardware casting to solve the above-mentioned problems. Summary of the Invention

[0003] The purpose of the present invention is to solve the shortcomings of the background technology and to propose an automatic sand mixing device for hardware casting.

[0004] To achieve the above objectives, the present invention adopts the following technical solutions: an automatic sand mixing device for hardware casting, comprising a sand mixer, wherein the sand mixer comprises a body, wherein a middle mixing component, a side mixing component and a material outlet component are arranged inside the body;

[0005] The middle mixing component is used to mix the molding material in the middle;

[0006] The edge mixing assembly is used to mix the molding material of the edge;

[0007] The material export component is used to export the mixed modeling material;

[0008] The central mixing assembly includes a swivel seat, a plurality of main scrapers are fixedly connected to the lower portion of the outer periphery of the swivel seat, a mounting frame is installed on the upper portion of the outer periphery of the swivel seat, a plurality of auxiliary scrapers are fixedly connected to the bottom of the mounting frame, the auxiliary scrapers are alternately distributed with the main scrapers, the top of the main scraper is fixedly connected to a fixed seat on the side away from the swivel seat, the middle of one end of the fixed seat is fixedly connected to a fixed rod, the other end of the fixed rod is fixedly connected to the middle of the outer periphery of the swivel seat, the outer periphery of the fixed rod is rotatably connected to a rotating sleeve, the bottom of the outer periphery of the rotating sleeve is fixedly connected to a rake claw, and part of the interior of the rotating sleeve is connected to the fixed rod through a coil spring;

[0009] The edge mixing assembly includes multiple groups of stirring blades, each group of stirring blades includes two upper and lower stirring blades, and the stirring blades are all arranged on the inner side of the machine body, and a cavity is opened inside the side wall of the machine body.

[0010] Preferably, the edge mixing assembly also includes a rotating ring, and an annular tooth groove is opened in the middle of the outer circumference of the rotating ring, and the outer circumference of the annular tooth groove is meshed with a gear, and the middle of the gear is fixedly connected to a rotating shaft 1, and the rotating shaft 1 is rotatably installed in the lower part of the side wall cavity of the machine body through a fixed block, and the upper part of the outer circumference of the rotating shaft 1 is fixedly connected to a gear column 1, and one side of the gear column 1 is meshed with a gear disk 1, and the middle part of the gear disk 1 is fixedly connected to a telescopic sleeve 1, and the telescopic sleeve 1 passes through the side wall of the machine body and is rotatably connected to the machine body.

[0011] Preferably, one side of the upper part of the gear disc one is meshed with a gear column two, the middle part of the gear column two is fixedly connected to a rotating shaft two, the rotating shaft two is rotatably installed on the upper part of the side wall cavity of the machine body through a fixed block, the upper part of the outer periphery of the rotating shaft two is fixedly connected with a gear column three, one side of the gear column three is meshed with a gear disc two, the middle part of the gear disc two is installed with a telescopic sleeve two, the telescopic sleeve two passes through the side wall of the machine body, the telescopic sleeve two is rotatably connected to the machine body, and stirring blades are installed on the outer periphery of the telescopic end of the telescopic sleeve two and the telescopic sleeve one.

[0012] Preferably, a reciprocating thread groove is provided on the lower part of the outer periphery of the rotating shaft, and the lower part of the outer periphery of the rotating shaft is connected to a lifting sleeve through the reciprocating thread groove. The lower part of the lifting sleeve is slidably connected to a limit frame, and the limit frame is installed inside the side wall cavity of the machine body. The bottom of the lifting sleeve is fixedly connected to a piston disk, and a piston cylinder is provided at the lower part of the lifting sleeve. The piston cylinder is fixedly connected to the bottom of the side wall cavity of the machine body, and the piston disk is slidably connected to the inside of the piston cylinder.

[0013] Preferably, the material discharge assembly includes a discharging flap, which is connected to one side of the bottom of the machine body through a hinge, and the bottom of the discharging flap is rotatably connected to an electric push rod, and the end of the electric push rod away from the discharging flap is rotatably connected to a fixed frame, and the fixed frame is fixedly connected to one side of the middle part of the bottom end of the machine body, and a material guide frame is provided at the lower part of the discharging flap, and the material guide frame is set to an inclined state.

[0014] Preferably, a servo motor is installed in the middle of the bottom end of the body, and evenly distributed supporting feet are fixedly connected to the outer side of the bottom end of the body.

[0015] Preferably, a connecting tube is installed on one side of the bottom of the piston cylinder, and a conduit 1 and a conduit 2 are installed on one end of the connecting tube away from the piston cylinder through a three-way joint.

[0016] Preferably, the ends of the fixing seats are fixedly connected to the inner side of the swivel, and the swivel is rotatably connected to the lower part of the inner side wall of the machine body.

[0017] Preferably, one end of the catheter 1 away from the connecting pipe is connected to the telescopic sleeve 1 through a rotary joint, and one end of the catheter 1 away from the connecting pipe is connected to the telescopic sleeve 2 through a rotary joint.

[0018] 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.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention constructs a three-dimensional mixing system through the coordinated operation of the main scraper, auxiliary scraper, rake claw and stirring blades. The main and auxiliary scrapers achieve comprehensive coverage and mixing of the molding material at the bottom of the machine body, and the rake claw deflects under the resistance of the molding material, further enhancing the stirring effect; the upper and lower stirring blades rotate in coordination, processing the molding material 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 the uniform blending of various molding materials and provide stable performance molding sand for casting.

[0021] The present invention aims to solve the problem of edge accumulation of molding materials that 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 materials accumulated 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 spillage problem caused by excessively high edge materials, ensuring the efficiency and stability of the sand mixing process, and improving the sand mixing quality and the cleanliness of the production environment.

[0022] 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 molding material is smoothly discharged. At the same time, the rake claws and 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 the materials attached to themselves, effectively avoiding material residue and ensuring thorough discharging, which greatly improves the discharging efficiency and reduces the cost and labor intensity of manual cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic front view of the three-dimensional structure of an automatic sand mixing device for hardware casting according to the present invention;

[0024] Figure 2 This is a schematic top view of the internal structure of an automatic sand mixing device for hardware casting according to the present invention;

[0025] Figure 3 This 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;

[0026] Figure 4 This is a schematic cross-sectional view of the internal structure of an automatic sand mixing device for hardware casting according to the present invention;

[0027] Figure 5 This is a partial structural diagram of the stirring blade of an automatic sand mixing device for hardware casting according to the present invention;

[0028] Figure 6 This is a partial structural diagram of a toothed disc of an automatic sand mixing device for hardware casting according to the present invention;

[0029] Figure 7 for Figure 5 Enlarged view of point A in the middle.

[0030] 1. Sand mixer; 101. Machine body; 102. Side bin; 103. Support legs; 104. Material guide rack; 105. Rotating seat; 106. Discharge flap; 107. Mixing blade; 108. Rotating ring; 109. Fixed seat; 110. Fixed rod; 111. Auxiliary scraper; 112. Main scraper; 113. Electric push rod; 114. Fixed rack; 115. Servo motor; 116. Connecting pipe; 117. Second gear disc; 118. Piston cylinder ; 119. Annular tooth groove; 120. Gear column two; 121. Rotating shaft two; 122. Rotating sleeve; 123. Rake claw; 124. Mounting frame; 125. Telescopic sleeve two; 126. Gear column three; 127. Piston disc; 128. Gear column one; 129. Gear disc one; 130. Conduit one; 131. Conduit two; 132. Lifting sleeve; 133. Limiting frame; 134. Gear; 135. Telescopic sleeve one; 136. Rotating shaft one. DETAILED DESCRIPTION

[0031] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are merely examples, and those skilled in the art may conceive of other obvious variations.

[0032] like Figure 1-Figure 7 The automatic sand mixing device for hardware casting shown in the figure includes a sand mixer 1, which includes a body 101, a servo motor 115 is installed in the middle of the bottom end of the body 101, and evenly distributed support legs 103 are fixedly connected to the outer side of the bottom end of the body 101;

[0033] The middle mixing component is used to mix the molding material in the middle;

[0034] The edge mixing component is used to mix the molding material of the edge;

[0035] The material export component is used to export the mixed modeling materials;

[0036] The middle mixing assembly includes a rotating seat 105, a plurality of main scrapers 112 are fixedly connected to the lower part of the outer periphery of the rotating seat 105, a mounting frame 124 is installed on the upper part 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, the top of the main scraper 112 away from the side of the rotating seat 105 is fixedly connected to the fixed seat 109, the middle part of one end of the fixed seat 109 is fixedly connected to the fixed rod 110, and the other end of the fixed rod 110 is fixedly connected to the fixed rod 110. The fixed base 105 is fixedly connected to the middle of the outer periphery, and the outer periphery of the fixed rod 110 is rotatably connected to the rotating sleeve 122. The outer periphery bottom of the rotating sleeve 122 is fixedly connected to the rake claw 123. Part of the interior of the rotating sleeve 122 is connected to the fixed rod 110 through a coil spring. The ends of the fixed base 109 are fixedly connected to the inner side of the rotating ring 108. The rotating ring 108 is rotatably connected to the lower part of the inner wall of the body 101. The body 101 is provided with a middle mixing component, a side mixing component and a material outlet component.

[0037] Furthermore, in specific implementation, people can use the sand mixer 1 to fully mix and evenly mix various molding materials such as raw sand, clay, water, etc. When performing the 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 mixing requirements. The servo motor 115 can drive the rotating seat 105 to rotate, and the rotating seat 105 can drive each main scraper 112 and the mounting frame 124 to rotate synchronously. The main scraper 112 and the auxiliary scrapers 111 fixed on the outside of the mounting frame 124 are rotated. The auxiliary scraper 111 can cooperate with the main scraper 112 to achieve non-dead-angle contact with the bottom of the body 101, thereby fully mixing various molding materials. When the main scraper 112 rotates, it will continuously contact the molding material. Under the resistance of the molding material, the rake claw 123 will have hysteresis, causing the rake claw 123 and the rotating sleeve 122 to deflect on the fixed rod 110. The rake claw 123 can further mix the molding material, which is beneficial to practical use.

[0038] Furthermore, in a specific implementation, during the discharge process, as the molding material inside the body 101 gradually becomes less, the rake claw 123 can gradually droop, so that the rake claw 123 will continue to contact the molding material. When the molding material is basically discharged, under the action of the coil spring inside the partially rotating sleeve 122, the rake claw 123 of this part will be quickly brought back, so that the bottom of the rake claw 123 of this part will collide with one side of the main scraper 112, causing the main scraper 112 to vibrate, thereby being able to pass through the instantaneous strong force. The vibration will shake off part of the modeling material attached to the main scraper 112, which is convenient for the discharging work of the sand mixer 1. During the vibration of the main scraper 112, the rake claw 123 without a coil spring in the other part of the rotating sleeve 122 will be vibrated, so that the rake claw 123 of this part can be swung up and continue to vibrate the main scraper 112 at a low frequency, which is beneficial to continuous discharging work. When discharging, the modeling material attached to the stirring blade 107 can be shaken off through the lateral movement of the upper and lower stirring blades 107, which is beneficial to actual use.

[0039] The side mixing assembly includes a plurality of stirring blades 107, each group of stirring blades 107 includes two stirring blades 107, and the stirring blades 107 are arranged on the inner edge of the body 101. A cavity is provided inside the side wall of the body 101. The side mixing assembly also includes a rotating ring 108. The middle part of the outer periphery of the rotating ring 108 is provided with an annular tooth groove 119. The outer periphery of the annular tooth groove 119 is meshed with a gear 134. The middle part of the gear 134 is fixedly connected to a rotating shaft 136. The rotating shaft 136 is rotatably installed in the lower part of the side wall cavity of the body 101 through a fixed block. The upper part of the outer periphery of the rotating shaft 136 is fixedly connected to a gear column 128. One side of the gear column 128 is meshed with a gear disc 129. The middle part of the gear disc 129 is fixedly connected to a telescopic sleeve 13 5. The telescopic sleeves 135 all pass through the side wall of the body 101, and the telescopic sleeves 135 are rotatably connected to the body 101. One side of the upper part of the gear plate 129 is meshed with the gear column 2 120, and the middle part of the gear column 2 120 is fixedly connected with the rotating shaft 2 121. The rotating shaft 2 121 is rotatably installed on the upper part of the side wall cavity of the body 101 through a fixed block. The upper part of the outer periphery of the rotating shaft 2 121 is fixedly connected with the gear column 3 126, and one side of the gear column 3 126 is meshed with the gear plate 2 117. The middle part of the gear plate 2 117 is installed with the telescopic sleeve 2 125. The telescopic sleeve 2 125 all passes through the side wall of the body 101, and the telescopic sleeve 2 125 is rotatably connected to the body 101. The outer periphery of the telescopic end of the telescopic sleeve 2 125 and the telescopic sleeve 1 135 is installed with a stirring blade 107.

[0040] Furthermore, in a specific implementation, the fixing seat 109 at the end of the main scraper 112 can drive the rotating ring 108 to rotate synchronously, and the ring tooth groove 119 opened on the outer periphery of the rotating ring 108 can drive the various gears 134 engaged therewith to rotate, thereby driving the rotating shaft 136 to rotate. When the rotating shaft 136 rotates, it will drive the toothed disc 129 to rotate through the toothed column 128 on the upper part, and further drive the toothed column 2 120 engaged on the upper part of the toothed disc 129 to rotate synchronously. The gear column 126 is driven to rotate in step, thereby driving the gear column 3 126 coaxial with the gear column 2 120 to rotate, and the gear plate 2 117 is driven to rotate through the gear plate 2 117 and the gear plate 1 129. The telescopic sleeve 2 125 and the telescopic sleeve 1 135 at the upper and lower parts can be driven to rotate synchronously. The stirring blades 107 installed at the ends of the telescopic sleeve 2 125 and the telescopic sleeve 1 135 can stir and mix the molding material on the inner edge of the body 101, which is beneficial to practical use.

[0041] Among them, the lower part of the outer periphery of the rotating shaft 136 is provided with a reciprocating thread groove, the lower part of the outer periphery of the rotating shaft 136 is connected to the lifting sleeve 132 through the reciprocating thread groove, the lower part of the lifting sleeve 132 is slidably connected to the limit frame 133, the limit frame 133 is installed inside the side wall cavity of the body 101, the bottom of the lifting sleeve 132 is fixedly connected to the piston disk 127, the lower part of the lifting sleeve 132 is provided with a piston cylinder 118, the piston cylinder 118 is fixedly connected to the bottom of the side wall cavity of the body 101, and the piston disk 127 is slidably connected to the piston cylinder 118. A connecting pipe 116 is installed on one side of the bottom of the piston cylinder 118. A conduit 130 and a conduit 2 131 are installed on the end of the connecting pipe 116 away from the piston cylinder 118 through a tee joint. The end of the conduit 130 away from the connecting pipe 116 is connected to the telescopic sleeve 135 through a rotary joint. The end of the conduit 130 away from the connecting pipe 116 is connected to the telescopic sleeve 2 125 through a rotary joint. The conduit 130 and the conduit 2 131 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 body 101.

[0042] Furthermore, in a specific implementation, when the rotating shaft 136 rotates, the reciprocating thread groove at the lower part of its outer circumference will drive the lifting sleeve 132 to move up and down, and the piston disc 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, thereby realizing continuous extraction and pumping of the liquid inside the piston cylinder 118. Under the connection between the conduit 130 and the conduit 2 131, the liquid will enter the interior of the telescopic sleeve 2 125 and the telescopic sleeve 1 135 respectively, and under the action of the front end part of the piston cylinder 118, the telescopic sleeve 2 125 and the telescopic sleeve 1 135 will be continuously extended and retracted, thereby Instead, the stirring blade 107 will move laterally inside the machine body 101, thereby increasing the range of influence of the stirring blade 107, and in this process, the modeling material accumulated on the inner edge of the machine body 101 under the action of centrifugal force can be pushed down, so that the modeling material can contact the auxiliary scraper 111 and the main scraper 112 in the middle of the machine body 101, avoiding the local concentration of the modeling material inside the machine body 101, resulting in the mixing effect not being fully exerted, and at the same time, it can avoid the situation where some modeling materials continue to pile up at the edge, which is easy to spill later, which is conducive to the continuous mixing of more modeling materials. When the modeling materials are mixed, people can further start the electric push rod 113.

[0043] The material discharge assembly includes a discharge flap 106, which is connected to one side of the bottom of the body 101 by a hinge. The bottom of the discharge flap 106 is rotatably connected to an electric push rod 113. The 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 body 101. A material guide frame 104 is provided at the lower part of the discharge flap 106, and the material guide frame 104 is set to an inclined state.

[0044] Furthermore, in the specific implementation, the contraction of the electric push rod 113 can drive the discharge flap 106 to flip, so that the discharge port can be opened. At this time, under the continuous operation of the auxiliary scraper 111 and the main scraper 112, the molding material inside the body 101 will be continuously pushed to the discharge port, so that the mixed molding material can be discharged. The discharged molding material will fall onto the guide rack 104, and the guide rack 104 can further guide the molding material, and the electric push rod 113 can realize the automatic closure of the discharge port.

[0045] Working principle:

[0046] In actual use, people can use the sand mixer 1 to fully mix and evenly mix various molding materials such as raw sand, clay, water, etc. When performing the 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 servo motor 115 can drive the swivel seat 105 to rotate, and the swivel seat 105 can drive each main scraper 112 and the mounting frame 124 to rotate synchronously. The main scraper 112 and the auxiliary scraper 111 fixed outside the mounting frame 124 can achieve mixing of the molding materials at the bottom of the machine body 101. The auxiliary scraper 111 can cooperate with the main scraper 112 to achieve dead-angle contact with the bottom of the machine body 101, so that various The molding material is fully mixed. When the main scraper 112 rotates, it will continuously contact the molding material. Under the resistance of the molding material, the rake claw 123 will have hysteresis, causing the rake claw 123 and the rotating sleeve 122 to deflect on the fixed rod 110. The molding material can be further mixed by the rake claw 123, which is beneficial to practical use. In this process, the fixed seat 109 at the end of the main scraper 112 can drive the rotating ring 108 to rotate synchronously, and the annular tooth groove 119 opened on the outer periphery of the rotating ring 108 can drive the various gears 134 engaged with it to rotate, thereby driving the rotating shaft 136 to rotate. When the rotating shaft 136 rotates, it drives the toothed disc 129 to rotate through the upper tooth column 128. The movement will further drive the gear column 2 120 meshing with the upper part of the gear plate 129 to rotate synchronously, thereby driving the gear column 3 126 coaxial with the gear column 2 120 to rotate, and the gear plate 2 117 will be driven to rotate through the gear column 3 126, and the telescopic sleeve 2 125 and the telescopic sleeve 1 135 at the upper and lower parts can be driven to rotate synchronously through the gear plate 2 117 and the gear plate 1 129. The stirring blade 107 installed at the end of the telescopic sleeve 2 125 and the telescopic sleeve 1 135 can achieve the stirring and mixing of the molding material on the inner edge of the body 101, which is beneficial to actual use. In this process, when the rotating shaft 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 periphery. The piston disc 127 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, thereby realizing continuous extraction and pumping of the liquid inside the piston cylinder 118. Under the connection between the conduit 130 and the conduit 2 131, the liquid will enter the interior of the telescopic sleeve 2 125 and the telescopic sleeve 1 135 respectively. Under the action of the front end piston cylinder 118, the telescopic sleeve 2 125 and the telescopic sleeve 1 135 will be continuously extended and retracted, thereby causing the stirring blade 107 to move laterally inside the body 101, thereby increasing the range of influence of the stirring blade 107, and in this process, the molding material accumulated on the inner edge of the body 101 under the action of centrifugal force can be pushed down.The molding material can be in contact with the auxiliary scraper 111 and the main scraper 112 in the middle of the machine body 101, so as to avoid the local concentration of the molding material inside the machine body 101, which may cause the mixing effect to not be fully exerted. At the same time, it can avoid the situation that some molding materials continue to pile up at the edge, which may cause them to spill easily later, which is conducive to the continuous mixing of more molding materials. When the molding materials are mixed, people can further start the electric push rod 113, and the contraction of the electric push rod 113 can drive the discharge flap 106 to flip, so that the discharge port can be opened. 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 that the mixed molding material can be discharged. The discharged molding material will fall onto the guide rack 104, which can further guide the molding material through the guide rack 104, and the electric push rod 113 can realize the automatic closing of the discharge port. When the material is basically discharged, the rake claw 123 of this part will be quickly brought back under the action of the coil spring inside the part rotating sleeve 122, so that the bottom of the rake claw 123 of this part will collide with one side of the main scraper 112, causing the main scraper 112 to vibrate, thereby shaking off part of the modeling material attached to the main scraper 112 through instantaneous strong vibration, facilitating the discharging work of the sand mixer 1. During the vibration of the main scraper 112, the rake claw 123 without the coil spring in the other part rotating sleeve 122 will be vibrated, so that the rake claw 123 of this part can be swung up and continue to vibrate the main scraper 112 at a low frequency, which is conducive to continuous discharging work. When discharging, the modeling material attached to the stirring blade 107 can be removed through the lateral movement of the upper and lower stirring blades 107, which is conducive to practical use. ,

[0047] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions merely illustrate the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed 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 component is used to mix the molding material in the middle; The edge mixing assembly is used to mix the molding 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 scraper (112) away from the rotating seat (105) is fixedly connected to a fixed scraper. A seat (109), wherein the middle portion of one end of the fixed seat (109) is fixedly connected to a fixed rod (110), the other end of the fixed rod (110) is fixedly connected to the middle portion 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 part of the interior of the rotating sleeve (122) is connected to the fixed rod (110) via a coil spring; The edge mixing assembly includes multiple groups of stirring blades, each group of stirring blades includes two stirring blades (107) on the upper and lower sides, the stirring blades (107) are arranged on the inner side of the body (101), and a cavity is provided inside the side wall of the body (101). The edge mixing assembly also includes a rotating ring (108), and a ring tooth groove (119) is provided in the middle of the outer periphery of the rotating ring (108). The outer periphery of the ring tooth groove (119) is meshed with a gear (134), and the middle of the gear (134) is fixedly connected to a rotating shaft (136). The rotating shaft (136) is rotatably installed in the lower part of the cavity of the side wall of the body (101) through a fixed block, and the upper part of the outer periphery of the rotating shaft (136) is fixedly connected to a gear column (134). (128), one side of the tooth column one (128) is meshedly connected with a tooth disc one (129), the middle of the tooth disc one (129) is fixedly connected with a telescopic sleeve one (135), the telescopic sleeve one (135) passes through the side wall of the body (101), the telescopic sleeve one (135) is rotatably connected to the body (101), one side of the upper part of the tooth disc one (129) is meshedly connected with a tooth column two (120), the middle of the tooth column two (120) is fixedly connected with a rotating shaft two (121), the rotating shaft two (121) is rotatably mounted on the upper part of the side wall cavity of the body (101) through a fixed block, the upper part of the outer periphery of the rotating shaft two (121) is fixedly connected with a tooth column three (126), one side of the tooth column three (126) The two gear discs (117) are meshed and connected, and the middle of the two gear discs (117) is installed with a telescopic sleeve (125), and the telescopic sleeve (125) passes through the side wall of the body (101). The two telescopic sleeves (125) are rotatably connected to the body (101), and the outer peripheries of the telescopic ends of the two telescopic sleeves (125) and the telescopic sleeve (135) are installed with stirring blades (107). The lower periphery of the rotating shaft (136) is provided with a reciprocating thread groove, and the lower periphery of the rotating shaft (136) is connected to the lifting sleeve (132) through the reciprocating thread groove. The lower part of the lifting sleeve (132) is slidably connected to the limit frame (133), and the limit frame (133) is installed in the cavity of the side wall of the body (101). The bottom of the lifting sleeve (132) is fixedly connected to a piston disc (127), the lower part of the lifting sleeve (132) is provided with a piston cylinder (118), the piston cylinder (118) is fixedly connected to the bottom of the side wall cavity of the body (101), the piston disc (127) is slidably connected to the inside of the piston cylinder (118), a connecting pipe (116) is installed on one side of the bottom of the piston cylinder (118), the end of the connecting pipe (116) away from the piston cylinder (118) is installed with a conduit 1 (130) and a conduit 2 (131) through a three-way head, the end of the fixed seat (109) is 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 body (101).The end of the conduit 1 (130) away from the connecting pipe (116) is connected to the telescopic sleeve 1 (135) through a rotary joint, and the end of the conduit 1 (130) away from the connecting pipe (116) is connected to the telescopic sleeve 2 (125) through a rotary joint. The conduit 1 (130) and the conduit 2 (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 body (101).

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

3. The automatic sand mixing device for hardware casting according to claim 1, 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).

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