A horizontal bowl-shaped sand mixer and a sand mixing method

Abstract

This invention discloses a horizontal bowl-shaped sand mixer and a sand mixing method. The sand mixer includes: a horizontal mixing bowl, a drive wheel, a driven wheel, a central rod, a connecting rod, a plow blade, sand inlets and outlets, and a receiving hopper. The horizontal mixing bowl is mounted on the drive shaft and the driven shaft. The rotation of the drive wheel drives the horizontal mixing bowl and the driven wheel to rotate. At the center of rotation of the horizontal mixing bowl, a central rod is installed at one end. The central rod is a fixed structure connected to the horizontal mixing bowl via a bearing, and the other end is the sand inlet and outlet. The central rod is located at the center of rotation of the horizontal mixing bowl and is connected to the tail end of the plow blade via a connecting rod. The angle between the line connecting the tip of the plow blade and the central axis of the horizontal mixing bowl and the horizontal plane is 5° to 10°. The tip of the plow blade is in contact with the side of the horizontal mixing bowl. This solution has the advantages of high sand mixing efficiency, convenient cleaning, and high safety factor.

Description

Technical Field

[0001] This invention belongs to the field of casting machinery, specifically relating to a horizontal bowl-shaped sand mixer and a sand mixing method. Background Technology

[0002] Bowl-shaped sand mixers are flexible and convenient, typically used when sand molds / cores need repair and require a small amount of resin sand, or when a small amount of special sand is needed to control the solidification temperature field. The typical mixing volume is 5-10 kg. Existing bowl-shaped sand mixers consist of a bowl, a mixing and agitating device, etc. The mixing and agitating device generally consists of a central rotor and blades. Mixing takes place around the mixing and agitating device, stirring and mixing the materials. Figure 1 As shown. The existing bowl-shaped sand mixer has the following problems: (1) During use, the blades gradually wear down, which increases the gap between the blades and the bowl, and the material accumulates in the gap, resulting in a decrease in sand mixing efficiency and sand mixing quality; (2) The blades and the central rotor are an integral structure, and the replacement cost is high; (3) Inevitably, sand sticks to the central rotor, blades and the corners of the inlet and outlet sand ports during the sand mixing process, which is difficult to clean and easy to cause safety accidents. Summary of the Invention

[0003] In view of this, the purpose 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] This invention provides a horizontal bowl-shaped sand mixer, comprising: a horizontal bowl, a drive wheel, a driven wheel, a central rod, a connecting rod, a plow blade, and a receiving hopper; the horizontal bowl is mounted on the drive shaft and the driven shaft, and the rotation of the drive wheel drives the horizontal bowl and the driven wheel to rotate; at the rotation center of the horizontal bowl, a central rod is installed at one end, which is a fixed structure connected to the horizontal bowl through a bearing, and the other end is a sand inlet / outlet; the central rod is located at the rotation center of the horizontal bowl, and the central rod is connected to the tail end of the plow blade through a connecting rod, and the angle between the line connecting the tip of the plow blade and the central axis of the horizontal bowl and the horizontal plane is 5° to 10°; the tip of the plow blade is in close contact with the side of the horizontal bowl.

[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 basin is 150mm to 250mm, specifically 150mm, 160mm, 170mm, 180mm, 190mm, 200mm, 210mm, 220mm, 230mm, 240mm or 250mm; the radius of the horizontal 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 / outlet is 150mm to 200mm, specifically 150mm, 160mm, 170mm, 180mm, 190mm or 200mm.

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

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

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

[0011] Preferably, the cross-section of the plow blade is a near-isosceles triangle with a base length of 10mm to 20mm, specifically 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm or 20mm, and the sides are inverted parabolic, which facilitates the diversion of materials.

[0012] Preferably, the length direction of the plow blade is distributed along a spiral, and the angle between the tangent 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°, which facilitates the rolling of materials.

[0013] This invention provides a sand mixing method using a horizontal bowl-shaped sand mixer. The sand mixing process in the horizontal bowl-shaped sand mixer described above includes the following steps:

[0014] The raw sand and resin are loaded into the horizontal mixing bowl in proportion. The motor is started and the speed of the horizontal mixing bowl is adjusted. The material is observed to tumble continuously and smoothly in the sand mixer. Under the action of centrifugal force, the material rotates close to the horizontal mixing bowl. After contacting the plow blade, it is diverted by the plow blade under the action of inertia and moves along the guide channel formed by the plow blade until it falls under the action of gravity or falls off the guide channel at the end of the plow blade. This process is repeated to complete the sand mixing. After mixing, the receiving hopper is extended from the inlet and outlet to catch the falling material.

[0015] Preferably, the rotation speed of the horizontal washing basin is 3000rpm to 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 includes a cleaning step for the sand mixer, specifically including:

[0018] Add the raw sand into the horizontal mixing bowl through the inlet and outlet, start the motor, adjust the speed of the horizontal mixing bowl, and observe the raw sand continuously and smoothly tumbling in the sand mixer. Under the flushing of the raw sand, the sand mixer is cleaned.

[0019] Preferably, in the cleaning step, the rotation speed of the horizontal washing machine basin is 3000rpm to 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 includes a horizontal bowl, a drive wheel, a driven wheel, a central rod, a connecting rod, a plow blade, and a receiving hopper; the horizontal bowl is placed on the drive shaft and the driven shaft, and the rotation of the drive wheel drives the horizontal bowl and the driven wheel to rotate; at the rotation center of the horizontal bowl, a central rod is installed at one end, which is a fixed structure and connected to the horizontal bowl through a bearing, and the other end is a sand inlet / outlet; the central rod is located at the rotation center of the horizontal bowl, and the central rod is connected to the tail end of the plow blade through a connecting rod, and the angle between the line connecting the tip of the plow blade and the central axis of the horizontal bowl and the horizontal plane is 5° to 10°; the tip of the plow blade is in close contact with the side of the horizontal bowl. The horizontal bowl-shaped sand mixer provided by this invention features an adjustable distance between the plow blades and the horizontal mixing bowl, which reduces plow blade wear, facilitates replacement, and extends service life. It also improves sand mixing efficiency and quality. Furthermore, the fixed plow blades and rotating horizontal mixing bowl of this invention avoid the safety risks associated with rapid blade rotation. The technical solution provided by this invention significantly improves the production efficiency of the sand mixer and effectively prevents operators from being scratched by the blades during cleaning, thus enhancing the inherent safety of the equipment. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

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

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

[0024] Appendix Figure 2 Marking explanation: 1 is horizontal machine basin, 2 is drive wheel, 3 is driven wheel, 4 is center rod, 5 is connecting rod, 6 is plow blade, 7 is sand inlet / outlet, and 8 is receiving hopper. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort 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 drive wheel 2, a driven wheel 3, a central rod 4, a connecting rod 5, a plow blade 6, and a receiving hopper 7; the horizontal machine basin 1 is placed on the drive wheel 2 and the driven wheel 3, and the rotation of the drive wheel 2 drives the horizontal machine basin 1 and the driven wheel 3 to rotate; at the rotation center of the horizontal machine basin, one end is equipped with the central rod 4, which is a fixed structure and connected to the horizontal machine basin 1 through a bearing, and the other end is the sand inlet / outlet 7; the central rod 4 is located at the rotation center of the horizontal machine basin 1, and the central rod 4 is connected to the tail end of the plow blade 6 through the connecting rod 5, and the angle between the line connecting the tip of the plow blade 6 and the central axis of the horizontal machine basin 1 and the horizontal plane is 5° to 10°; the tip of the plow blade 6... The end is close to the side of the horizontal machine basin 1; the width of the horizontal machine basin 1 is 150mm to 250mm, and the radius is 300mm to 400mm; the diameter of the sand inlet and outlet 7 is 150mm to 200mm; the diameter of the drive wheel 2 is 100mm, which is connected to the frequency converter motor and is used to drive the horizontal machine basin 1 and the driven wheel 3 to rotate; the diameter of the driven wheel 3 is 100mm; the plow blade 6 has a cross-section of a near isosceles triangle with a base length of 10mm to 20mm and a waist that is an inverse parabola, which facilitates the diversion of materials; the length direction of the plow blade 6 is distributed along a spiral line, and the angle between the tangent at the tail end and the vertical direction is 70° to 80°, which facilitates the rolling of materials.

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

[0029] The raw sand and resin are loaded into the horizontal mixing bowl 1 in proportion. The motor is started and the speed of the horizontal mixing bowl 1 is adjusted to 3000-5000 rpm. The material can be observed to continuously and smoothly roll in the sand mixer. Under the action of centrifugal force, the material rotates close to the horizontal mixing bowl 1. After contacting the plow blade 6, it is diverted by the plow blade under the action of inertia and moves along the guide channel formed by the plow blade until it falls under the action of gravity or falls off the guide channel at the tail end of the plow blade 6. This process is repeated to complete the sand mixing. The sand mixing time is generally 3-5 minutes. After mixing, the receiving hopper 8 is inserted from the inlet / outlet 7 to catch the falling material.

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

[0031] Add the raw sand into the horizontal mixing bowl 1 through the inlet and outlet, start the motor, and adjust the speed of the horizontal mixing bowl 1 to 3000-5000 rpm. You can observe that the raw sand rolls continuously and smoothly in the sand mixer. Under the flushing of the raw sand, the sand mixer is cleaned.

[0032] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A horizontal bowl-shaped sand mixer, characterized in that, include: The machine comprises a horizontal basin, a drive wheel, a driven wheel, a central rod, a connecting rod, a plow blade, and a receiving hopper. The horizontal basin is mounted on the drive wheel and the driven wheel; the rotation of the drive wheel drives the horizontal basin and the driven wheel to rotate. At the center of rotation of the horizontal basin, a central rod is installed at one end. The central rod is a fixed structure connected to the horizontal basin via a bearing, and the other end is a sand inlet / outlet. The central rod is located at the center of rotation of the horizontal basin and is connected to the tail end of the plow blade via a connecting rod. The angle between the line connecting the tip of the plow blade and the central axis of the horizontal basin and the horizontal plane is 5°~10°. The tip of the plow blade is in close contact with the side of the horizontal basin. The cross-section of the plow blade is a nearly isosceles triangle with a base length of 10mm~20mm and a leg that is an inverse parabola. The length direction of the plow blade is distributed along a spiral, and the angle between the tangent at the tail end and the vertical direction is 70°~80°.

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

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

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

5. The horizontal bowl-shaped sand mixer according to claim 1, characterized in that, The drive wheel is connected to a 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 80mm~120mm.

7. A sand mixing method using a horizontal bowl-shaped sand mixer, characterized in that, The sand mixing process in the horizontal bowl-shaped sand mixer according to any one of claims 1 to 6 includes the following steps: The raw sand and resin are loaded into the horizontal mixing bowl in proportion. The motor is started and the speed of the horizontal mixing bowl is adjusted. The material is observed to continuously and smoothly roll in the sand mixer. Under the action of centrifugal force, the material rotates close to the horizontal mixing bowl. After contacting the plow blade, it is diverted by the plow blade under the action of inertia and moves along the guide channel formed by the plow blade until it falls under the action of gravity or falls off the guide channel at the end of the plow blade. This process is repeated to complete the sand mixing. After mixing, the receiving hopper is extended from the sand inlet and outlet to catch the falling material.

8. The sand mixing method according to claim 7, characterized in that, It also includes the cleaning steps for the sand mixer, specifically: Add raw sand into the horizontal mixing bowl through the inlet and outlet, start the motor, adjust the speed of the horizontal mixing bowl, and observe the raw sand continuously and smoothly tumbling in the sand mixer. Under the flushing of the raw sand, the sand mixer is cleaned.

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