Horizontal bowl-shaped sand mixer and sand mixing method

Abstract

The invention discloses a horizontal bowl-shaped sand mixer and a sand mixing method. The sand mixer comprises a horizontal machine basin, a driving wheel, a driven wheel, a center rod, a connecting rod, coulters, a sand inlet and outlet and a material receiving hopper. The horizontal machine basin is placed on the driving shaft and the driven shaft, and the driving wheel rotates to drive the horizontal machine basin and the driven wheel to rotate; at the rotating center of the horizontal machine basin, one end of the central rod is provided with a fixed structure and is connected with the horizontal machine basin through a bearing, and the other end of the central rod is provided with a sand inlet / outlet; the center rod is located in the rotating center of the horizontal machine basin and connected with the tail end of the coulter through the connecting rod, and the included angle between the connecting line of the tip end of the coulter and the center shaft of the horizontal machine basin and the horizontal plane is 5-10 degrees. The tip of the coulter is attached to the side face of the horizontal machine basin. The scheme has the advantages of high sand mixing efficiency, convenience in cleaning and high safety coefficient.

Description

Technical Field

[0001] The invention belongs to the field of casting machinery, and in particular relates to a horizontal bowl-shaped sand mixer and a sand mixing method. Background Art

[0002] The bowl-shaped sand mixer is flexible and convenient. It is usually used when a small amount of resin sand is needed to repair the sand mold / core, or a small amount of special sand is set to control the solidification temperature field. The mixing amount is usually 5-10kg. The existing bowl-shaped sand mixer is composed of a machine basin, a mixing and stirring device, etc. The mixing and stirring device is generally composed of a central rotor and blades. The mixing is carried out around the mixing and stirring device to stir and mix the materials, such as Figure 1 The existing bowl-shaped sand mixer has the following problems: (1) The blades gradually wear out during use, causing the gap between the blades and the machine bowl to increase, and the material accumulates in the gap, resulting in a decrease in the sand mixing efficiency and quality; (2) The blades and the center rotor are an integral structure, and the replacement cost is high; (3) During the sand mixing process, sand will inevitably stick to the center rotor, blades, and the corners of the sand inlet and outlet, which is difficult to clean and prone to safety accidents. Summary of the invention

[0003] In view of this, the object of the present invention is to provide a horizontal bowl-shaped sand mixer and a sand mixing method. The sand mixer provided by the present invention has high sand mixing efficiency and sand mixing quality, long service life, is easy to clean, and has a high intrinsic safety factor.

[0004] The invention provides a horizontal bowl-shaped sand mixer, comprising: a horizontal machine basin, a driving wheel, a driven wheel, a center rod, a connecting rod, a plow cutter, and a material receiving hopper; the horizontal machine basin is placed on a driving shaft and a driven shaft, and the driving wheel rotates to drive the horizontal machine basin and the driven wheel to rotate; a center rod is installed at one end of the rotation center of the horizontal machine basin, the center rod is a fixed structure, connected to the horizontal machine basin through a bearing, and the other end is a sand inlet and outlet; the center rod is located at the rotation center of the horizontal machine basin, the center rod is connected to the tail end of the plow cutter through a connecting rod, and the angle between the connecting line of the plow cutter tip and the central axis of the horizontal machine basin and the horizontal plane is 5° to 10°; the plow cutter tip is closely fitted to the side surface of the horizontal machine basin.

[0005] Preferably, the angle between the line connecting the tip of the plow blade and the central axis of the horizontal machine basin and the horizontal plane can be 5°, 6°, 7°, 8°, 9° or 10°.

[0006] Preferably, the width of the horizontal machine basin is 150mm to 250mm, specifically 150mm, 160mm, 170mm, 180mm, 190mm, 200mm, 210mm, 220mm, 230mm, 240mm or 250mm; the radius of the horizontal machine basin is 300mm to 400mm, specifically 300mm, 310mm, 320mm, 330mm, 340mm, 350mm, 360mm, 370mm, 380mm, 390mm or 400mm.

[0007] Preferably, the diameter of the sand inlet and outlet is 150 mm to 200 mm, specifically 150 mm, 160 mm, 170 mm, 180 mm, 190 mm or 200 mm.

[0008] Preferably, the diameter of the driving wheel is 80 mm to 120 mm, specifically 80 mm, 90 mm, 100 mm, 110 mm or 120 mm.

[0009] Preferably, the driving wheel is connected to a variable frequency motor and is used to drive the horizontal machine basin and the driven wheel to rotate.

[0010] Preferably, the diameter of the driven wheel is 80 mm to 120 mm, specifically 80 mm, 90 mm, 100 mm, 110 mm or 120 mm.

[0011] Preferably, the cross-section of the plow is a nearly isosceles triangle with a base length of 10 mm to 20 mm, specifically 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm or 20 mm, and a waist that is an inverse parabola to facilitate material diversion.

[0012] Preferably, the length direction of the plow blade is distributed along a spiral line, and the angle between the tangent line at the tail end and the vertical direction is 70° to 80°, specifically 70°, 71°, 72°, 73°, 74°, 75°, 76°, 77°, 78°, 79° or 80°, to facilitate the rolling of materials.

[0013] The present invention provides a sand mixing method of a horizontal bowl-shaped sand mixer, and sand mixing is performed in the horizontal bowl-shaped sand mixer described in the above technical solution, comprising the following steps:

[0014] Load the raw sand and resin into the horizontal machine basin in proportion, start the motor, adjust the rotation speed of the horizontal machine basin, and observe that the material rolls continuously and smoothly in the sand mixer; the material rotates close to the horizontal machine basin under the action of centrifugal force, and after contacting the plowshare, it is diverted by the plowshare under the action of inertia and moves along the guide groove formed by the plowshare until it falls under the action of gravity or falls off the guide groove at the tail end of the plowshare, and the sand mixing is completed in this reciprocating manner; after mixing, extend the receiving hopper from the inlet and outlet to catch the fallen material.

[0015] Preferably, the rotation speed of the horizontal machine basin is 3000rpm~5000rpm, specifically 3000rpm, 3100rpm, 3200rpm, 3300rpm, 3400rpm, 3500rpm, 3600rpm, 3700rpm, 3800rpm, 3900rpm, 4000rpm, 4100rpm, 4200rpm, 4300rpm, 4400rpm, 4500rpm, 4600rpm, 4700rpm, 4800rpm, 4900rpm or 5000rpm.

[0016] Preferably, the sand mixing time is 3 min to 5 min, specifically 3 min, 3.2 min, 3.5 min, 3.7 min, 4 min, 4.2 min, 4.5 min, 4.7 min or 5 min.

[0017] Preferably, the sand mixing method further comprises a sand mixing machine cleaning step, specifically comprising:

[0018] Add the raw sand into the horizontal machine basin from the inlet and outlet, start the motor, adjust the speed of the horizontal machine basin, and observe that the raw sand rolls continuously and smoothly in the sand mixer. The sand mixer is cleaned under the flushing of the raw sand.

[0019] Preferably, in the cleaning step, the rotation speed of the horizontal machine basin is 3000rpm~5000rpm, specifically 3000rpm, 3100rpm, 3200rpm, 3300rpm, 3400rpm, 3500rpm, 3600rpm, 3700rpm, 3800rpm, 3900rpm, 4000rpm, 4100rpm, 4200rpm, 4300rpm, 4400rpm, 4500rpm, 4600rpm, 4700rpm, 4800rpm, 4900rpm or 5000rpm.

[0020] Compared with the prior art, the present invention provides a horizontal bowl-shaped sand mixer and a sand mixing method. The horizontal bowl-shaped sand mixer provided by the present invention comprises a horizontal machine basin, a driving wheel, a driven wheel, a center rod, a connecting rod, a plow cutter, and a receiving hopper; the horizontal machine basin is placed on a driving shaft and a driven shaft, and the driving wheel rotates to drive the horizontal machine basin and the driven wheel to rotate; at the rotation center of the horizontal machine basin, a center rod is installed at one end, the center rod is a fixed structure, connected to the horizontal machine basin through a bearing, and the other end is a sand inlet and outlet; the center rod is located at the rotation center of the horizontal machine basin, and the center rod is connected to the tail end of the plow cutter through a connecting rod, and the angle between the connecting line of the plow cutter tip and the central axis of the horizontal machine basin and the horizontal plane is 5° to 10°; the plow cutter tip is closely fitted to the side of the horizontal machine basin. The distance between the plow blade and the horizontal machine basin in the horizontal bowl-shaped sand mixer provided by the present invention is adjustable, which can reduce the wear of the plow blade and facilitate replacement, thereby extending the service life and improving the sand mixing efficiency and quality; moreover, the plow blade of the sand mixer of the present invention is fixed, and the horizontal machine basin rotates, avoiding the safety risks of rapid rotation of the blades. The technical solution provided by the present invention greatly improves the production efficiency of the sand mixer, can effectively prevent the operator from being scratched by the blades during the process of cleaning the sand mixer, and improves the intrinsic safety factor of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0022] Figure 1 This is a schematic diagram of a traditional bowl-shaped sand mixer;

[0023] Figure 2 It is a schematic diagram of a horizontal bowl-shaped sand mixer of the present invention.

[0024] Attached Figure 2 Marking instructions: 1 is the horizontal machine basin, 2 is the driving wheel, 3 is the driven wheel, 4 is the center rod, 5 is the connecting rod, 6 is the plow blade, 7 is the sand inlet and outlet, and 8 is the receiving hopper. DETAILED DESCRIPTION

[0025] 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.

[0026] Example 1

[0027] This embodiment provides a horizontal bowl-shaped sand mixer, the structure of which is as follows: Figure 2 As shown, it includes: a horizontal machine basin 1, a driving wheel 2, a driven wheel 3, a center rod 4, a connecting rod 5, a plow 6, and a hopper 7; the horizontal machine basin 1 is placed on the driving wheel 2 and the driven wheel 3, and the driving wheel 2 rotates to drive the horizontal machine basin 1 and the driven wheel 3 to rotate; at the rotation center of the horizontal machine basin, a center rod 4 is installed at one end, and the center rod 4 is a fixed structure, connected to the horizontal machine basin 1 through a bearing, and the other end is a sand inlet and outlet 7; the center rod 4 is located at the rotation center of the horizontal machine basin 1, and the center rod 4 is connected to the tail end of the plow 6 through the connecting rod 5, and the angle between the line connecting the tip of the plow 6 and the central axis of the horizontal machine basin 1 and the horizontal plane is 5° to 10°; the tip of the plow 6 The end is closely fitted with the side of the horizontal machine basin 1; the width of the horizontal machine basin 1 is 150mm~250mm, and the radius is 300mm~400mm; the diameter of the sand inlet and outlet 7 is 150mm~200mm; the diameter of the driving wheel 2 is 100mm, which is connected to the frequency conversion motor to drive the horizontal machine basin 1 and the driven wheel 3 to rotate; the diameter of the driven wheel 3 is 100mm; the cross section of the plow 6 is a nearly isosceles triangle, the base length is 10mm~20mm, and the waist is an inverted parabola, which is convenient for material diversion; the length direction of the plow 6 is distributed along the spiral line, and the angle between the tangent at the tail end and the vertical direction is 70°~80°, which is convenient for the material to roll off.

[0028] This embodiment also provides a method for mixing sand in the above-mentioned horizontal bowl-shaped sand mixer, comprising the following steps:

[0029] Load the raw sand and resin into the horizontal machine basin 1 in proportion, start the motor, adjust the speed of the horizontal machine basin 1 to 3000-5000 rpm, and observe that the material rolls continuously and smoothly in the sand mixer; the material rotates close to the horizontal machine basin 1 under the action of centrifugal force, and after contacting the plow 6, it is diverted by the plow under the action of inertia and moves along the guide groove formed by the plow until it falls under the action of gravity or falls off the guide groove at the tail end of the plow 6. The sand mixing is completed in this reciprocating manner, and the sand mixing time is generally 3min-5min; after mixing, extend the receiving hopper 8 from the inlet and outlet 7 to catch the fallen material.

[0030] This embodiment also provides a method for cleaning the above-mentioned horizontal bowl-shaped sand mixer, comprising the following steps:

[0031] Add raw sand into the horizontal machine basin 1 from the inlet and outlet, start the motor, and adjust the rotation speed of the horizontal machine basin 1 to 3000-5000 rpm. It can be observed that the raw sand rolls continuously and smoothly in the sand mixer, and the sand mixer is cleaned under the flushing of the raw sand.

[0032] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A horizontal bowl-shaped sand mixer, characterized in that: include: Horizontal machine basin, driving wheel, driven wheel, center rod, connecting rod, plow cutter and material receiving hopper; the horizontal machine basin is placed on the driving shaft and the driven shaft, and the rotation of the driving wheel drives the horizontal machine basin and the driven wheel to rotate; the center rod is installed at one end of the rotation center of the horizontal machine basin, and the center rod is a fixed structure, which is connected to the horizontal machine basin through a bearing, and the other end is a sand inlet and outlet; the center rod is located at the rotation center of the horizontal machine basin, and the center rod is connected to the tail end of the plow cutter through a connecting rod, and the angle between the line connecting the tip of the plow cutter and the center axis of the horizontal machine basin and the horizontal plane is 5°~10°; the tip of the plow cutter is closely fitted to the side of the horizontal machine basin.

2. The horizontal bowl-shaped sand mixer according to claim 1, characterized in that: The width of the horizontal machine basin is 150 mm to 250 mm, and the radius is 300 mm to 400 mm.

3. The horizontal bowl-shaped sand mixer according to claim 1, characterized in that: The diameter of the sand inlet and outlet is 150 mm to 200 mm.

4. The horizontal bowl-shaped sand mixer according to claim 1, characterized in that: The diameter of the driving wheel is 80 mm to 120 mm.

5. The horizontal bowl-shaped sand mixer according to claim 1, characterized in that: The driving wheel is connected to the variable frequency motor and is used to drive the horizontal machine basin and the driven wheel to rotate.

6. The horizontal bowl-shaped sand mixer according to claim 1, characterized in that: The diameter of the driven wheel is 80 mm to 120 mm.

7. The horizontal bowl-shaped sand mixer according to claim 1, characterized in that: The cross section of the plow is a nearly isosceles triangle, the base is 10 mm to 20 mm long, and the waist is an inverse parabola.

8. The horizontal bowl-shaped sand mixer according to claim 1, characterized in that: The length direction of the plow blade is distributed along a spiral line, and the angle between the tangent line at the tail end and the vertical direction is 70° to 80°.

9. A sand mixing method for a horizontal bowl-shaped sand mixer, characterized in that: The sand mixing in the horizontal bowl-shaped sand mixer according to any one of claims 1 to 8 comprises the following steps: Load the raw sand and resin into the horizontal machine basin in proportion, start the motor, adjust the rotation speed of the horizontal machine basin, and observe that the material rolls continuously and smoothly in the sand mixer; the material rotates close to the horizontal machine basin under the action of centrifugal force, and after contacting the plowshare, it is diverted by the plowshare under the action of inertia and moves along the guide groove formed by the plowshare until it falls under the action of gravity or falls off the guide groove at the tail end of the plowshare, and the sand mixing is completed in this reciprocating manner; after mixing, extend the receiving hopper from the inlet and outlet to catch the fallen material.

10. The sand mixing method according to claim 9, characterized in that: It also includes the cleaning steps of the sand mixer, including: Add the raw sand into the horizontal machine basin from the inlet and outlet, start the motor, adjust the speed of the horizontal machine basin, and observe that the raw sand rolls continuously and smoothly in the sand mixer. The sand mixer is cleaned under the flushing of the raw sand.

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