Sand mill for coating production

Abstract

The invention discloses a sand mill for coating production, and relates to the technical field of sand mills for coating production, and the sand mill for coating production comprises a fixed table. When the sand mill for coating production rotates through a driving motor, a rotating shaft can drive a fixing disc and a limiting column to rotate, and the limiting column is extruded by inclined planes of the bottom surfaces of an upper shell and a lower shell and a first spring to drive a grinding cylinder and a filter plate to do up-down reciprocating motion; a dredging plate which is fixed up and down but rotates along with the grinding cylinder is matched to dredge the filter plate, so that the filter plate is prevented from being blocked, the ground coating is favorably filtered and screened, and the product quality is improved; and a collecting plate is driven to move up and down while the fixing disc moves up and down in a reciprocating mode, the collecting plate extrudes a hinge rod to enable the hinge rod to rotate, meanwhile, the hinge rod drives the collecting plate to move towards the center, coating particles falling after being ground are gathered and collected, and material taking is more convenient.

Description

Technical Field

[0001] The invention relates to the technical field of sand mills for coating production, in particular to a sand mill for coating production. Background Art

[0002] Sand mill is a key equipment in paint production, mainly used to grind pigments and fillers to make the paint reach the required fineness, glossiness and stability. In the early paint production process, the grinding process was inefficient. With the development of the paint industry, the requirements for paint quality are getting higher and higher, including smaller particle size, narrower particle size distribution and higher color saturation. The emergence of sand mill has solved these problems well.

[0003] Patent announcement number CN216025298U is a sand mill for paint production, which includes a support plate, a sand mill barrel, and a stirring shaft. The support plate is provided with a first support roller, a second support roller, a third support roller, and a fourth support roller. The sand mill barrel is stacked with a first rotation groove and a second rotation groove. The sand mill barrel is rotatably arranged on the first support roller and the second support roller through the first rotation groove, and is rotatably arranged on the third support roller and the fourth support roller through the second rotation groove. A feed and discharge pipe is arranged on the top of the sand mill barrel. It will not cause paint accumulation and has a good sanding effect.

[0004] In the above-mentioned patent, the paint is directly discharged after being ground by multi-support rollers, and the ground paint is not filtered or screened, so the quality of the paint grinding cannot be guaranteed, and it is inevitable that the ground paint contains larger particles, which may affect the use effect after output. Simply adding a filter screen or filter plate also has a greater risk of clogging in actual use. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a sand grinder for coating production, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above purpose, the present invention is implemented through the following technical solutions: a sand mill for paint production includes a fixed table, a mounting frame is detachably mounted on the upper surface of the fixed table, an upper shell is slidably mounted on the inner wall of the mounting frame, a lower shell is attached to the upper shell, the outer wall of the lower shell is slidably connected to the inner wall of the mounting frame, the upper shell and the lower shell are fixed by bolts, a feed port is provided on the upper shell, a rotating shaft is passed through the upper surfaces of the upper shell and the lower shell, and the penetration is slidably connected, the upper end of the rotating shaft is fixedly connected to the output end of the driving motor, when the driving motor is started, its output end drives the rotating shaft to rotate, the rotating shaft passes through the fixed plate, The fixing plate is fixedly connected at the penetration point, and the rotation of the rotating shaft drives the fixed plate to rotate. A first spring is fixed on the upper surface of the upper fixed plate, and the first spring is compressed when the fixed plate moves upward. A limiting column is fixed on the bottom surface of the lower fixed plate, and the limiting column fits the bottom surface of the inner wall of the upper shell and the lower shell, and the bottom surface of the inner wall of the upper shell and the lower shell is a slope relative to the side wall. When the limiting column fits its bottom surface and rotates, it drives the fixed plate, the rotating shaft and the motor to move up and down. The rotating shaft is provided with an anti-blocking device for conveniently filtering the ground paint, and the anti-blocking device is provided with an auxiliary device for convenient intermittent feeding. The rotating shaft is provided with a stirring device for conveniently breaking up the paint and promoting sanding work;

[0007] Among them, the anti-blocking device includes a grinding cylinder, a filter plate, a limit block, a limit plate, a limit rod, a dredging plate, a connecting frame, a hinge rod, a hinge block, a collecting plate and a second spring, the grinding cylinder is fixedly connected to the outer wall of the rotating shaft, the filter plate is fixed on the bottom surface of the grinding cylinder, and the filter plate filters the ground paint particles, the limit block is fixed on the inner wall of the lower shell body, the bottom end of the limit block is slidably connected to the limit plate, the limit block is fixed, and the limit plate is fixed relative to the shell body, the limit rod is fixed on the bottom surface of the limit plate, and the limit plate fixes the limit rod relative to the shell body, the limit rod passes through the grinding cylinder and is slidably connected at the penetration point, the limit rod will rotate with the grinding cylinder and drive the limit plate to rotate at the same time, the dredging plate is fixed on the end of the limit rod away from the limit plate, the dredging plate rotates with the limit rod, but is fixed relative to the shell, the rotating shaft passes through the dredging plate and is rotatably connected at the penetration point.

[0008] According to the above technical solution, a connecting frame is fixed to the bottom surface of the dredging plate, and the dredging plate fixes the connecting frame relative to the shell. The outer wall of the connecting frame is hinged with a hinged rod, and the end of the hinged rod away from the connecting frame is hinged with a hinged block, and the hinged rod is driven to rotate when the hinged block moves up and down. A collecting plate is slid at the end of the hinged block away from the hinged rod, and the hinged block and the collecting plate are driven to slide when the hinged rod rotates.

[0009] According to the above technical solution, the bottom surface of the collecting plate and the upper surface of the lower fixed plate are slidably connected, and a second spring is fixed to the upper surface of the hinge block. The second spring is stretched when the hinge block slides, and one end of the second spring away from the hinge block is fixedly connected to the upper surface of the inner wall of the collecting plate. The second spring applies a pulling force to the hinge block so that the hinge block is always at the highest point within the sliding range.

[0010] According to the above technical solution, the auxiliary device includes a wave groove, an auxiliary cylinder, a sliding rod, a guide strip, a baffle, a push rod and a third spring. The wave groove is opened on the outer wall of the grinding cylinder, and the auxiliary cylinder is slidably installed on the outer wall of the grinding cylinder.

[0011] According to the above technical solution, a sliding rod is fixed to the inner wall of the auxiliary cylinder, and the outer wall of the sliding rod is slidably connected to the inner wall of the wave groove. When the grinding cylinder rotates, the sliding rod is driven to reciprocate up and down. A guide bar is fixed to the inner wall of the upper shell body, and the guide bar is slidably connected to the outer wall of the auxiliary cylinder. When the sliding rod reciprocates up and down, it drives the auxiliary cylinder to slide up and down.

[0012] According to the above technical solution, a baffle is slidingly provided on the outer wall of the guide strip, and a push rod is fixed on the bottom surface of the baffle. When the auxiliary tube slides upward, the push rod can be pushed upward, and the push rod slides upward to drive the baffle to slide upward. A third spring is fixed on the upper surface of the baffle, and the third spring is compressed when the baffle slides upward. When the push rod is not subjected to the thrust of the auxiliary tube, the baffle is subjected to the thrust of the third spring to drive the push rod to slide downward.

[0013] According to the above technical solution, the stirring device includes a limiting groove, a positioning cylinder, a rotating rod and a stirring plate. The inner wall of the baffle is provided with a limiting groove, and the limiting groove moves up and down with the baffle.

[0014] According to the above technical solution, the rotating shaft passes through the positioning cylinder and is rotatably connected at the penetration point. A rotating rod passes through the positioning cylinder and is rotatably connected at the penetration point. The end of the rotating rod away from the positioning cylinder is slidably connected to the limiting groove. When the limiting groove moves up and down, it drives the rotating rod to rotate. A stirring plate is fixed to the outer wall of the rotating rod. When the rotating rod rotates, it drives the stirring plate to swing.

[0015] The present invention provides a sand mill for coating production, which has the following beneficial effects:

[0016] 1. When the driving motor of the invention rotates, the rotating shaft drives the fixed disk and the limiting column to rotate. The limiting column is squeezed by the inclined surfaces of the bottom surfaces of the upper shell and the lower shell and the first spring to drive the grinding cylinder and the filter plate to reciprocate up and down, and cooperates with the dredging plate that is fixed up and down but rotates with the grinding cylinder to dredge the filter plate to prevent the filter plate from being blocked, which is beneficial to filtering and screening the ground paint and improving product quality. At the same time, while the fixed disk reciprocates up and down, it drives the collecting plate to move up and down, and the collecting plate squeezes the hinged rod to rotate the hinged rod. At the same time, the hinged rod drives the collecting plate to move toward the center, so that the paint particles that fall after grinding are gathered and collected, which is more convenient for material collection.

[0017] 2. The invention can drive the auxiliary cylinder to slide up and down through the rotation of the grinding cylinder in conjunction with the wave groove and the sliding rod. When the auxiliary cylinder slides up and down, it can lift up the incompletely ground paint, so that the paint falls into the grinding cylinder along the inclined surface of the top of the auxiliary cylinder along with the new paint and is ground again, thereby improving the yield and reducing costs; the auxiliary cylinder cooperates with the push rod and the third spring to make the baffle slide up and down repeatedly, so that the feed port can be fed intermittently, avoiding the influence of excessive paint in the grinding cylinder on grinding, and avoiding the accumulation of large particles of paint causing blockage, reducing the steps of manual feeding, making feeding more convenient and quick, and improving production efficiency.

[0018] 3. The invention positions the end of the rotating rod away from the baffle by sliding the baffle up and down in cooperation with the positioning cylinder, thereby driving the sliding connection between the rotating rod and the baffle to rotate. When the rotating rod rotates, it drives the stirring plate to swing, stirring the paint and the grinding medium to break them up, making the paint and the grinding medium more evenly distributed, thereby improving the grinding efficiency during grinding. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the internal top view structure of the present invention;

[0021] Figure 3 For the present invention Figure 2 A schematic diagram of the local enlarged structure of area A;

[0022] Figure 4 It is a schematic diagram of the internal front view structure of the present invention;

[0023] Figure 5 This is a schematic diagram of the internal structure of the present invention when viewed from above;

[0024] Figure 6 It is a schematic diagram of a half-section structure of the present invention;

[0025] Figure 7 This is a schematic diagram of the structure of the anti-blocking device of the present invention;

[0026] Figure 8 It is a schematic diagram of the shell structure of the present invention;

[0027] Fig. 9 It is a schematic diagram of the structure of the internal bottom part of the present invention;

[0028] Fig.10 It is a schematic diagram of the internal cross-sectional structure of the present invention.

[0029] In the figure: 1, fixed table; 2, mounting frame; 3, upper shell; 4, lower shell; 5, feed port; 6, rotating shaft; 7, driving motor; 8, fixed plate; 9, first spring; 10, limiting column; 11, anti-blocking device; 111, grinding cylinder; 112, filter plate; 113, limiting block; 114, limiting plate; 115, limiting rod; 116, dredging plate; 117, connecting frame; 118, hinged rod; 119, hinged block; 1110, collecting plate; 1111, second spring; 12, auxiliary device; 121, wave groove; 122, auxiliary cylinder; 123, sliding rod; 124, guide strip; 125, baffle; 126, top rod; 127, third spring; 13, stirring device; 131, limiting groove; 132, positioning cylinder; 133, rotating rod; 134, stirring plate. DETAILED DESCRIPTION

[0030] 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.

[0031] See also Figure 1-Figure 10 , one embodiment of the present invention is:

[0032] A sand grinder for paint production includes a fixed table 1, on the upper surface of which a mounting frame 2 is detachably mounted, an upper shell 3 is slidably mounted on the inner wall of the mounting frame 2, and a lower shell 4 is fitted onto the upper shell 3. The mounting frame 2 fixes the upper shell 3 and the lower shell 4 obliquely on a placement surface, which facilitates feeding and prevents the ground paint from remaining in a grinding chamber and being unable to be discharged, causing the paint to accumulate in the grinding chamber, thereby affecting grinding efficiency and long-term use.

[0033] Among them, the outer wall of the lower shell 4 is slidably connected to the inner wall of the mounting frame 2, the upper shell 3 and the lower shell 4 are fixed by bolts, the upper shell 3 and the lower shell 4 can be disassembled, which is convenient for regular cleaning of the sand mill, the upper shell 3 is provided with a feed port 5, and the feed port 5 can be connected to the bottom of the storage bin, which is convenient for automatic feeding at any time, the upper surface of the upper shell 3 and the lower shell 4 is penetrated by a rotating shaft 6, and the penetration is slidably connected, the upper end of the rotating shaft 6 is fixedly connected to the output end of the driving motor 7, the driving motor 7 is started, and the output end of the driving motor 7 drives the rotating shaft 6 to start unidirectional rotation, the rotating shaft 6 penetrates the fixed disk 8, and the penetration is fixedly connected, when the rotating shaft 6 rotates unidirectionally, it drives the fixed disk 8 fixed on its outer wall to rotate, and the upper surface of the upper fixed disk 8 is fixed with a first spring 9, When the upper fixed disk 8 moves upward, the first spring 9 is compressed, so that the first spring 9 stores elastic potential energy. When the limiting column 10 passes the highest point of the bottom surface of the upper shell 3 and the lower shell 4, an elastic force is applied to the fixed disk 8 to push the fixed disk 8, the rotating shaft 6 and the limiting column 10 to slide downward for reset. The limiting column 10 is fixed to the bottom surface of the lower fixed disk 8. When the fixed disk 8 rotates, the limiting column 10 is driven to rotate with the fixed disk 8 around the central axis of the rotating shaft 6. Since the bottom surfaces of the upper shell 3 and the lower shell 4 are sloped, the limiting column 10 will slide upward along the bottom surfaces of the upper shell 3 and the lower shell 4 when the fixed disk 8 rotates. The rotating shaft 6 is provided with an anti-blocking device 11 for filtering the ground paint, and the rotating shaft 6 is provided with a stirring device 13 for breaking up the paint and promoting sanding.

[0034] Among them, the anti-blocking device 11 includes a grinding cylinder 111, a filter plate 112, a limit block 113, a limit plate 114, a limit rod 115, a dredging plate 116, a connecting frame 117, a hinge rod 118, a hinge block 119, a collecting plate 1110 and a second spring 1111. The grinding cylinder 111 is fixedly connected to the outer wall of the rotating shaft 6. When the rotating shaft 6 is rotated by the power of the driving motor 7, it will also drive the grinding cylinder 111 to rotate synchronously to provide power for grinding. When the grinding cylinder 111 rotates, the grinding medium and the paint in the cylinder collide and rub in the cylinder, so that the particles of the paint gradually become smaller. The rotating shaft 6 will slide up and down when it rotates, so the grinding cylinder 111 will also move up and down with the rotating shaft 6. The bottom surface of the grinding cylinder 111 is fixed with a filter plate 11 2. The filter plate 112 retains the paint particles whose particle diameters after grinding do not reach the filter hole range, and the paint particles whose particle diameters after grinding reach the filter hole range can fall into the lower layer through the filter plate 112. The inner wall of the lower shell 4 is fixed with a limit block 113, and the bottom end of the limit block 113 is slidably connected to the limit plate 114. Since the limit block 113 is fixed to the inner wall of the lower shell 4, and the upper surface of the limit plate 114 slides in contact with the limit block 113, the limit plate 114 will not move up and down when rotating. The bottom surface of the limit plate 114 is fixed with a limit rod 115, and the limit plate 114 fixes the limit rod 115. The limit rod 115 penetrates the grinding cylinder 111 and is slidably connected at the penetration point. The limit rod 115 will rotate together with the grinding cylinder 111 and drive the limit plate 114 together The dredging plate 116 is fixed to one end of the limit rod 115 away from the limit plate 114. The dredging plate 116 will not move up and down with the rotation of the driving motor 7, but will rotate with the grinding cylinder 111. Therefore, the protrusion of the dredging plate 116 can always be aligned with the filter holes of the filter plate 112. Therefore, when the grinding cylinder 111 rotates, it will drive the limit plate 114, the limit rod 115 and the dredging plate 116 to rotate together. The rotating shaft 6 passes through the dredging plate 116, and the penetration is rotatably connected. The position of the dredging plate 116 changes back and forth relative to the filter plate 112. Therefore, the protrusion on the upper surface of the dredging plate 116 can repeatedly insert into the filter holes of the filter plate 112, and the paint that may cause blockage in the filter holes is pushed out to dredge the filter plate 112. A connecting frame 117 is fixed, and the dredging plate 116 drives the connecting frame 117 to rotate together when it rotates. The outer wall of the connecting frame 117 is hinged with a hinge rod 118, and the end of the hinge rod 118 away from the connecting frame 117 is hinged with a hinge block 119. When the hinge block 119 moves up and down, it will drive the hinge rod 118 to rotate around the hinge of the hinge rod 118 and the connecting frame 117. A collecting plate 1110 is slidably connected to the end of the hinge block 119 away from the hinge rod 118. The bottom surface of the collecting plate 1110 is slidably connected to the upper surface of the lower fixed plate 8. When the fixed plate 8 rises, it drives the collecting plate 1110 to rise. When the collecting plate 1110 rises, it drives the end of the hinge rod 118 away from the connecting frame 117 to rise, causing the hinge rod 118 to rotate around the hinge with the connecting frame 117.When the hinge rod 118 rotates around the hinge, the collecting plate 1110 is pushed and pulled. A second spring 1111 is fixed on the upper surface of the hinge block 119. The end of the second spring 1111 away from the hinge block 119 is fixedly connected to the upper surface of the inner wall of the collecting plate 1110. The second spring 1111 always applies a pulling force to the hinge block 119, so that the hinge block 119 is always at the highest point within the sliding range, so as to avoid that when the connecting frame 117 moves relative to the fixed plate 8, the hinge rod 118 and the hinge block 119 are directly driven to move without rotating. The position of the hinge block 119 relative to the rotating shaft 6 changes, driving the collecting plate 1110 to slide, so that the collecting plate 1110 is on the fixed plate 8. The anti-blocking device 11 drives the internal rotating shaft 6, fixed disk 8, grinding cylinder 111, filter plate 112 to move up and down together through the operation of the driving motor 7, and these components are in relative motion with the components fixed on the shell and cannot move. Therefore, when the driving motor 7 rotates, the dredging plate 116 can move up and down relative to the filter plate 112 with the rotation to dredge the filter plate 112. At the same time, the connecting frame 117 can drive the hinge rod 118, the hinge block 119 and the collecting plate 1110 to move relative to the fixed disk 8, so that the collecting plate 1110 repeatedly collects and gathers the paint around the fixed disk 8 to the center, which is convenient for subsequent material collection.

[0035] When the present embodiment is working, the driving motor 7 is started, and the output end of the driving motor 7 drives the rotating shaft 6 to start unidirectional rotation. When the rotating shaft 6 rotates unidirectionally, it drives the fixed disk 8 fixed on its outer wall to rotate. When the fixed disk 8 rotates, it drives the limiting column 10 to rotate together with the fixed disk 8 around the central axis of the rotating shaft 6. Since the bottom surfaces of the upper shell 3 and the lower shell 4 are sloped, the limiting column 10 will slide upward along the bottom surfaces of the upper shell 3 and the lower shell 4 when the fixed disk 8 rotates. When the limiting column 10 slides upward, it drives the fixed disk 8 and the rotating shaft 6 to slide upward together. The upper fixed disk 8 compresses the first spring 9 when moving upward, so that the first spring 9 stores elastic potential energy. When the limiting column 10 passes the highest point of the bottom surfaces of the upper shell 3 and the lower shell 4, an elastic force is applied to the fixed disk 8 to push the fixed disk 8, the rotating shaft 6 and the limiting column 10 to slide downward for resetting.

[0036] When the rotating shaft 6 is rotated by the power of the driving motor 7, it will also drive the grinding cylinder 111 to rotate synchronously to provide power for grinding. When the grinding cylinder 111 rotates, the grinding medium and the paint in the cylinder collide and rub in the cylinder, so that the particles of the paint gradually become smaller, and the ground paint particles can fall into the lower layer through the filter plate 112. The rotating shaft 6 will slide up and down when rotating, so the grinding cylinder 111 will also move up and down with the rotating shaft 6, and the limit rod 115 penetrates the grinding cylinder 111. Therefore, when the grinding cylinder 111 rotates, it will drive the limit plate 114, the limit rod 115 and the dredging plate 116 to rotate together. The limit block 113 is fixed to the inner wall of the lower shell 4, and the limit plate 114 slides in contact with the limit block 113, so the limit plate 114 will not move up and down when rotating, and the dredging plate 116 changes its position back and forth relative to the filter plate 112, so the protrusion on the upper surface of the dredging plate 116 can repeatedly insert into the filter hole of the filter plate 112, The blocked paint is ejected and the filter plate 112 is unblocked. The unblocking plate 116 drives the connecting frame 117 to rotate together when rotating. When the fixed plate 8 rises relative to the connecting frame 117, the fixed plate 8 drives the collecting plate 1110 to rise. When the collecting plate 1110 rises, it drives the hinge rod 118 to rise away from the end of the connecting frame 117, causing the hinge rod 118 to rotate around the hinge with the connecting frame 117. When the hinge rod 118 rotates around the hinge, it pushes and pulls the collecting plate 1110. At the same time, the second spring 1111 always applies a pulling force to the hinge block 119, so that the hinge block 119 is always at the highest point within the sliding range, to prevent the connecting frame 117 from directly driving the hinge rod 118 and the hinge block 119 to move without rotating when the connecting frame 117 moves relative to the fixed plate 8. The position of the hinge block 119 relative to the rotating shaft 6 changes, driving the collecting plate 1110 to slide, so that the collecting plate 1110 gathers and collects the ground paint on the fixed plate 8.

[0037] See also Figure 1-Figure 10On the basis of the above embodiment, in another embodiment of the present invention, an auxiliary device 12 for intermittent feeding is provided in the anti-blocking device 11, and the auxiliary device 12 includes a wave groove 121, an auxiliary cylinder 122, a sliding rod 123, a guide bar 124, a baffle 125, a push rod 126 and a third spring 127. The wave groove 121 is provided on the outer wall of the grinding cylinder 111, and the auxiliary cylinder 122 is slidably mounted on the outer wall of the grinding cylinder 111. The sliding rod 123 is fixed to the inner wall of the auxiliary cylinder 122. The outer wall of the sliding rod 123 is slidably connected to the inner wall of the wave groove 121, and the sliding rod 123 fixedly connected to the auxiliary cylinder 122 is stuck in the The auxiliary cylinder 122 is in the wave groove 121, so when the grinding cylinder 111 rotates, the sliding rod 123 slides along the wave groove 121, driving the auxiliary cylinder 122 to slide up and down. A guide bar 124 is fixed to the inner wall of the upper shell 3. When the grinding cylinder 111 rotates together with the rotating shaft 6, the auxiliary cylinder 122 is restricted by the guide bar 124 and cannot rotate with the grinding cylinder 111. When the auxiliary cylinder 122 slides upward, the incompletely ground paint is lifted up by the auxiliary cylinder 122, slides down along the slope of the upper surface of the auxiliary cylinder 122, and falls into the grinding cylinder 111 for secondary grinding. The guide bar 124 is slidably connected to the outer wall of the auxiliary cylinder 122, and the guide bar 124 is connected to the outer wall of the auxiliary cylinder 122. A baffle 125 is slidably mounted on the outer wall of the strip 124, and a push rod 126 is fixed to the bottom surface of the baffle 125. When the auxiliary cylinder 122 slides upward, the push rod 126 is also lifted. After the push rod 126 is pushed by the auxiliary cylinder 122, it applies a push force upward to the baffle 125 to lift the baffle 125. A third spring 127 is fixed to the upper surface of the baffle 125. When the baffle 125 is lifted, the third spring 127 is compressed. After the baffle 125 is lifted, the material can be fed again. When the auxiliary cylinder 122 falls along with the wave groove 121, the baffle 125 is pushed down by the third spring 127, blocking the feed port 5 and stopping the feeding. 12 The rotation of the grinding cylinder 111 drives the auxiliary cylinder 122 to slide up and down. When the auxiliary cylinder 122 slides up and down, it can lift up the paint that has not been completely ground, so that the paint falls into the grinding cylinder 111 together with the new paint and is ground again, thereby improving the yield rate and reducing costs. The auxiliary cylinder 122 drives the push rod 126 and the baffle 125 to slide up and down repeatedly, so that the feed port 5 can be fed intermittently, avoiding excessive paint in the grinding cylinder 111, causing large particles of paint to be blocked and affecting grinding, and also avoiding the need for the staff to manually perform feeding operations multiple times after the grinding of the paint in the grinding cylinder 111 is completed, which affects the grinding efficiency.

[0038] The stirring device 13 includes a limiting groove 131, a positioning cylinder 132, a rotating rod 133 and a stirring plate 134. The inner wall of the baffle 125 is provided with a limiting groove 131, the rotating shaft 6 passes through the positioning cylinder 132, and is rotatably connected at the penetration point. The positioning cylinder 132 is penetrated by a rotating rod 133, and is rotatably connected at the penetration point. The positioning cylinder 132 rotates on the upper surface of the limiting plate 114, and one end of the rotating rod 133 away from the positioning cylinder 132 is slidably connected to the limiting groove 131. One end of the rotating rod 133 away from the positioning cylinder 132 is inserted into the limiting groove 131, and moves up and down with the baffle 125. Because the distance between the baffle 125 and the positioning cylinder 132 is different at different locations, the baffle 125 is moved up and down together with the baffle 125. When the rotating rod 133 slides up and down, the end thereof away from the positioning cylinder 132 will also slide in the limiting groove 131. A stirring plate 134 is fixed to the outer wall of the rotating rod 133. When the rotating rod 133 slides in the limiting groove 131, the angle of the center plane thereof will change, driving the angle of the stirring plate 134 to change, so that the stirring plate 134 will swing, and the paint and the grinding medium entering from the feed port 5 will be scattered. The stirring device 13 can drive the rotating rod 133 to rotate by the up and down sliding of the baffle plate 125. When the rotating rod 133 rotates, it drives the stirring plate 134 to swing, so as to stir the paint and the grinding medium, and break them up, so that the paint and the grinding medium are distributed more evenly, thereby improving the grinding efficiency.

[0039] When the present embodiment is working, when the grinding cylinder 111 rotates together with the rotating shaft 6, the auxiliary cylinder 122 is restricted by the guide bar 124 and cannot rotate together with the grinding cylinder 111. Because the sliding rod 123 fixedly connected to the auxiliary cylinder 122 is stuck in the wave groove 121, when the grinding cylinder 111 rotates, the sliding rod 123 slides along the wave groove 121, driving the auxiliary cylinder 122 to slide up and down. When the auxiliary cylinder 122 slides upward, the paint that is not completely ground is lifted up by the auxiliary cylinder 122 and moves along the auxiliary cylinder 122. The material slides down the slope of the upper surface and falls into the grinding cylinder 111 for secondary grinding. While the auxiliary cylinder 122 slides upward, it also lifts the push rod 126. After the push rod 126 is pushed by the auxiliary cylinder 122, it applies a thrust to the baffle 125 upward to lift the baffle 125 and compresses the third spring 127 at the same time. After the baffle 125 is lifted, material can be fed again. When the auxiliary cylinder 122 falls along with the wave groove 121, the baffle 125 falls under the thrust of the third spring 127, blocks the feed port 5, and stops feeding.

[0040] When the baffle 125 slides up and down with the rotation of the driving motor 7, the end of the rotating rod 133 away from the positioning cylinder 132 is inserted into the limiting groove 131, and moves up and down together with the baffle 125. Because the distance between the baffle 125 and the positioning cylinder 132 is different at different locations, when the baffle 125 slides up and down, the end away from the positioning cylinder 132 will also slide in the limiting groove 131. When the rotating rod 133 slides in the limiting groove 131, the angle of its center plane will change, driving the angle of the stirring plate 134 to change, causing the stirring plate 134 to swing, and the paint and grinding medium entering from the feed inlet 5 will be dispersed.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sand grinder for coating production, comprising a fixed table (1), characterized in that: The upper surface of the fixed platform (1) is detachably mounted with a mounting frame (2), the inner wall of the mounting frame (2) is slidably mounted with an upper shell (3), the upper shell (3) is fitted with a lower shell (4), the outer wall of the lower shell (4) is slidably connected to the inner wall of the mounting frame (2), the upper shell (3) and the lower shell (4) are fixedly connected by bolts, the upper shell (3) is provided with a feed port (5), the upper surfaces of the upper shell (3) and the lower shell (4) are penetrated by a rotating shaft (6), and the penetration is slidably connected, the upper end of the rotating shaft (6) and the driving The output end of the motor (7) is fixedly connected, the rotating shaft (6) passes through the fixed disk (8), and the connection is fixed at the penetration point, a first spring (9) is fixed on the upper surface of the upper fixed disk (8), and a limiting column (10) is fixed on the bottom surface of the lower fixed disk (8), the rotating shaft (6) is provided with an anti-blocking device (11) for facilitating filtering of the ground paint, the anti-blocking device (11) is provided with an auxiliary device (12) for facilitating intermittent feeding, and the rotating shaft (6) is provided with a stirring device (13) for facilitating breaking up the paint and promoting sanding; The anti-blocking device (11) comprises a grinding cylinder (111), a filter plate (112), a limit block (113), a limit plate (114), a limit rod (115), a dredging plate (116), a connecting frame (117), a hinge rod (118), a hinge block (119), a collecting plate (1110) and a second spring (1111); the grinding cylinder (111) is fixedly connected to the outer wall of the rotating shaft (6); the filter plate (112) is fixedly provided on the bottom surface of the grinding cylinder (111); A limiting block (113) is fixed on the inner wall of the lower shell (4); the bottom end of the limiting block (113) is slidably connected to a limiting plate (114); a limiting rod (115) is fixed to the bottom surface of the limiting plate (114); the limiting rod (115) passes through the grinding cylinder (111) and is slidably connected at the penetration point; a dredging plate (116) is fixed to one end of the limiting rod (115) away from the limiting plate (114); the rotating shaft (6) passes through the dredging plate (116) and is rotatably connected at the penetration point.

2. A sand mill for coating production according to claim 1, characterized in that: A connecting frame (117) is fixed to the bottom surface of the dredging plate (116); a hinged rod (118) is hingedly connected to the outer wall of the connecting frame (117); a hinged block (119) is hingedly connected to one end of the hinged rod (118) away from the connecting frame (117); and a collecting plate (1110) is slidably connected to one end of the hinged block (119) away from the hinged rod (118).

3. A sand mill for coating production according to claim 2, characterized in that: The bottom surface of the collecting plate (1110) is slidably connected to the upper surface of the lower fixed plate (8), and a second spring (1111) is fixed to the upper surface of the hinge block (119), and one end of the second spring (1111) away from the hinge block (119) is fixedly connected to the upper surface of the inner wall of the collecting plate (1110).

4. A sand mill for coating production according to claim 3, characterized in that: The auxiliary device (12) comprises a wave groove (121), an auxiliary cylinder (122), a sliding rod (123), a guide strip (124), a baffle (125), a push rod (126) and a third spring (127); the wave groove (121) is formed on the outer wall of the grinding cylinder (111); and the auxiliary cylinder (122) is slidably mounted on the outer wall of the grinding cylinder (111).

5. A sand mill for coating production according to claim 4, characterized in that: A sliding rod (123) is fixed on the inner wall of the auxiliary tube (122), and the outer wall of the sliding rod (123) is slidably connected to the inner wall of the wave groove (121). A guide bar (124) is fixed on the inner wall of the upper shell (3), and the guide bar (124) is slidably connected to the outer wall of the auxiliary tube (122).

6. A sand mill for coating production according to claim 5, characterized in that: A baffle (125) is slidably disposed on the outer wall of the guide strip (124), a top rod (126) is fixed to the bottom surface of the baffle (125), and a third spring (127) is fixed to the upper surface of the baffle (125).

7. A sand mill for coating production according to claim 6, characterized in that: The stirring device (13) comprises a limiting groove (131), a positioning cylinder (132), a rotating rod (133) and a stirring plate (134), and the limiting groove (131) is provided on the inner wall of the baffle plate (125).

8. A sand mill for coating production according to claim 7, characterized in that: The rotating shaft (6) passes through the positioning cylinder (132) and is rotatably connected at the penetration point. A rotating rod (133) passes through the positioning cylinder (132) and is rotatably connected at the penetration point. One end of the rotating rod (133) away from the positioning cylinder (132) is slidably connected to the limiting groove (131), and an agitating plate (134) is fixed to the outer wall of the rotating rod (133).

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