WO2022110735A1

WO2022110735A1 - Powder coating production process and production line thereof

Info

Publication number: WO2022110735A1
Application number: PCT/CN2021/097247
Authority: WO
Inventors: 李宏伟; 蔡荣; 李嘉诚; 廖叶根
Original assignee: 德清县金秋塑粉有限公司
Priority date: 2020-11-25
Filing date: 2021-05-31
Publication date: 2022-06-02
Also published as: CN112454790B; CN112454790A

Abstract

The invention relates to the technical field of powder coating production, in particular to a powder coating production process and a production line thereof. The powder coating production process comprises the steps of: s1, mixing and stirring the raw materials to form a mixed material; s2, heating and melting the mixed material; s3, tabletting-forming the molten mixed material by means of a tabletting device; s4, cooling a tablet by means of a cooling roller; s5, crushing the cooled tablet for the first time to form fragments; and s6, after crushing the fragments, filtering and collecting a powder, so that the quality of the powder coating can be improved.

Description

A kind of powder coating production process and its production line

technical field

The invention relates to the technical field of powder coating production, in particular to a powder coating production process and a production line thereof.

Background technique

There are many equipment, production processes and production lines for the production of existing powder coatings. For example, the Chinese patent with the application number of 201610110297.6 discloses a powder coating production line, which sequentially includes a mixer, a mixer, a tablet press and a powder coating collection device. , The material is transferred between the mixer and the mixer through a moving hopper, and the moving hopper can be installed on the mixer for mixing, and the tablet press and the powder coating collection device are transferred through a lifting hopper. materials.

The existing production line and the corresponding production process make the quality of the finished product not good enough, especially in the way of tablet cooling.

technical solutions

The purpose of the present invention is to provide a powder coating production process and a production line thereof that can improve the quality of the powder coating.

The above-mentioned technical purpose of the present invention is achieved through the following technical solutions: a powder coating production process, comprising steps: s1, mixing and stirring raw materials to form a mixed material; s2, heating and melting the mixed material; s3, melting the molten material The mixed material is formed into tablets by a tableting device; s4, the tablet is cooled by a cooling roller; s5, the cooled tablet is first pulverized to form fragments; s6, the fragments are pulverized and filtered to collect powder.

As a preference of the present invention, in step s1, the material is sanded while the material is being stirred.

As a preference of the present invention, in step s3, the surface of the pressed tablet is pressed to form a fluted structure distributed at left and right intervals.

As a preference of the present invention, in step s4, the outer cylinder wall of the cooling roller is equipped with annular reinforced cooling blocks arranged at left and right intervals, and a space for increasing cooling is formed between two adjacent annular reinforced cooling blocks. The cooling limit groove that contacts the surface and can be inserted into the convex part of the upper surface of the pressing piece.

A powder coating production line applied to the aforementioned powder coating production process, comprising a stirring device for producing powder coatings, a tablet guiding device, a tablet extrusion molding device, a cooling device, and a coarse pulverizer, which are sequentially arranged along the flow sequence of the production line. , a fine pulverizer, a filter device, the cooling device includes a conveyor belt for receiving the tablet formed by the tablet extrusion molding device and conveying it forward, and a front and rear spacer arranged above the conveying path of the conveyor belt. A cooling roller that presses against the upper surface of the tablet for rolling and cooling.

As a preference of the present invention, the stirring device includes a stirring barrel, a stirring shaft extending up and down and extending into the stirring barrel, and a stirring blade fixed on the stirring shaft for stirring the raw materials, and the stirring shaft also A frosted body that can rotate with the stirring shaft is connected.

As a preference of the present invention, a three-dimensional bracket that can rotate together with the stirring shaft is fixed on the side of the stirring shaft, and a plurality of the abrasive bodies are assembled on the three-dimensional bracket.

As a preference of the present invention, the tableting guide device includes a feeding hopper, a material conveying device located under the feeding hopper, and a heating device located at the outlet of the material conveying device, characterized in that the outlet of the heating device is A guide for guiding the melted flow is arranged below the duct, the guide includes a guide plate extending obliquely forward and downward, and a number of left and right spaced guide grooves are opened on the upper surface of the guide plate.

As a preference of the present invention, a V-shaped collection groove is formed on the guide plate and communicated with the inlets of all guide grooves on the upper side for receiving the molten material flowing down from above.

As a preference of the present invention, the tablet extrusion forming device includes a rear extrusion roller and a front extrusion roller located in front of and above the rear extrusion roller, the rear extrusion roller and the front extrusion roller. The pressing rollers are arranged at intervals and form a compression gap for the molten material to flow in and be extruded into a sheet structure. The outer wall of the front extrusion roller is formed with annular raised blocks arranged at intervals between the left and right. The adjacent two said An annular groove is formed between the annular raised blocks.

beneficial effect

Beneficial effects of the present invention:

1. Improve production efficiency;

2. The product quality of powder coatings is improved.

Embodiments of the present invention

The following specific examples are only to explain the present invention, but not to limit the present invention. Those skilled in the art can make modifications without creative contribution to the present examples as needed after reading this specification, but as long as the rights of the present invention are used All claims are protected by patent law.

Embodiment 1, as shown in Figure 1, a stirring device for producing powder coatings, comprising a stirring barrel a, a stirring shaft a1 extending up and down and extending into the stirring barrel a, and a stirring shaft a1 fixed on the stirring shaft a1 for The stirring blade a2 that stirs the raw materials, the stirring shaft a1 is also connected with a grinding body a3 that can rotate with the stirring shaft a1. The biggest improvement of this embodiment is that while the material is stirred, grinding can also be performed. The surface of the raw material has a more detailed matte surface, so that the fit between the broken raw materials is better, and it is more conducive to subsequent processing, such as the process of heating and pressing after mixing. The stirring tank a, the stirring blade a2, and the stirring shaft a1 only need to adopt the existing structure.

Further, a three-dimensional bracket a4 that can rotate together with the stirring shaft a1 is fixed on the side of the stirring shaft a1, and a plurality of the abrasive bodies a3 are assembled on the three-dimensional bracket a4. The three-dimensional bracket a4 can improve the strength of the structure, which is used for the abrasive body a3 and has better strength. At the same time, the three-dimensional bracket a4 itself and the abrasive body a3 can also stir the raw materials, and cooperate with the stirring blade a2 to stir, Efficiency has also improved.

Preferably, the three-dimensional support a4 includes an annular fixing ring a41 surrounding the periphery of the stirring shaft a1, and a plurality of linear reinforcing connections distributed in a circular array between the annular fixing ring a41 and the stirring shaft a1. rod a42. The annular fixing ring a41 and the stirring shaft a1 can be made of steel, and the fixing method involved is preferably realized by welding. Of course, it can also be installed and fixed by a detachable structural method such as bolts and nuts.

At least one of the annular fixing ring a41 and the linear reinforcing connecting rod a42 is sleeved with the frosted body a3.

At least two circumferential limit plates a5 distributed at intervals are fixed on the annular fixed ring a41, and a pair of frosted bodies a3 are formed between the two adjacent circumferential limit plates a5 on the upper circumference of the annular fixed ring a41. Limit interval for moving. The design of the circumferential limit plate a5 enables the abrasive body a3 to have the ability to move within a certain range, and it will be restricted to play a better effect. Here, the two adjacent circumferential limit plates a5 The circumferential distance between them is preferably larger than the size of the abrasive body a3 in the circumferential direction, so that the abrasive body a3 can have a certain ability to move. Similarly, at least two linear limit plates a6 distributed at intervals are fixed on the linear reinforcement connecting rod a42, and a pair of frosted bodies a3 are formed between the two adjacent linear limit plates a6 on the linear reinforcement connecting rod The limit interval of linear movement on a42.

Preferably, the linear reinforcing connecting rod a42 is inclined downward from the stirring shaft a1 to the direction away from the stirring shaft a1, so as to further optimize the structure. The cross-sections of the annular fixing ring a41 and the linear reinforcing connecting rod a42 may both be circular.

The grinding body a3 can be a grinding wheel or a grinding disc.

The stirring device of this embodiment can be used in a production line for producing powder, and can be used as a solution for a powder coating production line, including the aforementioned stirring device for producing powder coatings. Of course, the production line also needs to include other production lines. The process device will be introduced in detail later. Here, the bottom or side of the mixing barrel a should have a discharge port that can be opened and closed, so that the mixed material can be directly put into the receiving parts such as the feeding hopper b of the tableting guide device. , the subsequent embodiments of the tableting guide device will be introduced in detail.

Embodiment 2, as shown in Figure 2, a tableting guide device for producing powder coatings, comprising a feeding hopper b, a material conveying device b1 located below the feeding hopper b, and an outlet of the material conveying device b1 The heating device b2 and the feeding hopper b can receive the mixed material from the stirring device. The material transmission device b1 and the heating device b2 can be carried out by using the existing common equipment, and the mixed material can be melted to form a liquid or a colloid. The particularity of this embodiment lies in that a guide for guiding the molten stream is provided below the outlet of the heating device b2, and the guide includes a guide plate b3 that extends obliquely forward and downward, so The upper surface of the guide plate b3 is provided with a number of guide grooves b01 arranged at left and right intervals. By effectively guiding the molten material, the molten material can be more evenly spaced when entering the tablet forming device. , the synchronization is good, which is conducive to the production of a tablet with grooves and protrusions on the upper surface of the tablet.

Preferably, the guide plate b3 is formed with a V-shaped collecting groove b02 which communicates with the inlets of all the guide grooves b01 on the upper side and is used for receiving the molten material flowing down from above. The guide plate b3 is formed with a guide protrusion b4 which is arched upward in an arc shape in the middle region of the V-shaped collecting groove b02 . It can make the feeding material flow into the guide plate b3 to better convey the material to each guide groove b01. Due to the design of the groove shape, the paths of the guide grooves b01 on both sides are relatively long, so after passing through the diversion protrusion b4 The upper arc edge can guide the material to the left and right sides for downstream flow first, and there will be left in the middle to guide to the lower area of the diversion b4 and then fall down. The upper blanking position should be in the guide. The arc-shaped arched side of the flow protrusion b4.

In addition, in view of the difference in the raw materials of different powder coatings, the fluidity after melting will be different. For materials with poor fluidity, the following design can be made: the middle area of the guide b4 is formed with a guide plate b3. The middle fast flow channel b40 of the guide groove b01 where the middle area is located can ensure that the material flow in the middle will not be too slow and cause the problem that the middle thickness of the tablet is too thin.

Further, a lifting device b5 for lifting and lowering the guide plate b3 is installed and connected to the lower surface of the guide plate b3. The lifting device b5 can adopt the structure of a lifting screw, a pneumatic cylinder and the like. The lifting device b5 and the guide plate b3 can be detachably connected, and the detachable connection can also adopt the existing threaded connection and other easily detachable structures, which are convenient for replacement, so as to meet the requirements of different compositions of materials, or to meet different powder materials. product, can be adjusted. Further, the lifting device b5 is also connected with a traverse device b6 for moving in the horizontal direction. The traverse device b6, that is, the equipment that can move in the horizontal direction, can adopt the existing structures such as pneumatic cylinders.

Preferably, the upper side of the guide groove b01 of the guide plate b3 is covered with a cover plate b7 that can cover at least a part of the guide groove b01. The cover plate b7 can effectively protect the material in the guide groove b01 and prevent the material from overflowing situation occurs. The cover plate b7 is detachably mounted on the guide plate b3.

The tableting guide device of this embodiment can also be applied to a powder coating production line, that is, a powder coating production line includes a tableting guiding device for producing powder coating of this embodiment, the tableting guiding device It can be used in conjunction with the equipment on the production line in other embodiments.

Embodiment 3, as shown in Figure 3, a tablet extrusion molding device for producing powder coatings, comprising a rear extrusion roller c1 and a front extrusion roller c2 located above the rear extrusion roller c1 , the rear squeezing roller c1 and the front squeezing roller c2 are arranged at intervals and form a compression gap for the molten material to flow into and extrude into a sheet structure, and the outer cylinder wall of the front squeezing roller c2 is formed There are annular raised blocks c3 arranged at intervals on the left and right, and an annular groove c4 is formed between two adjacent annular raised blocks c3. In the tableting guide device in Example 2, molten material will flow out through the guide groove b01, and the molten material flowing out is facing the compression gap formed between the rear extrusion roller c1 and the front extrusion roller c2. , that is, the gap of extrusion molding, this molten material will be extruded to form a relatively stable original tablet, of course, the tablet requires subsequent cooling and further solidification, but the difference in this application from the prior art is that , the shape of the gap is different, because the front extrusion roller c2 is set by the annular convex block c3 to form a sequential structure of the concave and convex structure between the left and right, so it will affect the shape of the pressed sheet after the molten material is extruded. The design of the roller c2, and the conveyor belt is conveyed forward, the pressing side of the front extrusion roller c2 will become the upper surface of the tablet, so the upper surface of the tablet will also be formed with the front extrusion roller c2. The concave-convex structure corresponding to the external structure, that is, the annular groove c4 of the front extrusion roller c2 is the protrusion of the tablet, and the annular raised block c3 is the groove of the tablet. What is the benefit of this for the tablet? This structure makes the contact area of the tablet larger in the subsequent cooling process, which is more conducive to cooling, and is more conducive to smooth transportation, and the cooling effect is better. With the subsequent crushing structure, crushing will be easier and more uniform.

Preferably, the height of the front extrusion roller c2 can be adjusted up and down. The height of the rear extrusion roller c1 can be adjusted up and down. All these lifting adjustments can be realized after installation and connection of existing lifting devices.

Protruding reinforcing strips c5 extending left and right are formed on the outer cylinder wall of the front extrusion roller c2 at the annular groove c4. Improve the effectiveness of extrusion molding, but also increase the contact area, which is also conducive to the crushing of subsequent tableting. The radial thickness of the raised reinforcing bar c5 is smaller than the radial thickness of the annular raised block c3, and the raised reinforcing bar c5 should be retracted in the annular groove c4, and the effect will be better.

Further, a dust collecting device c6 is provided in the regions on the left and right sides of the front squeezing roller c2, and the dust collecting device c6 may use existing dust collecting equipment. The vacuum cleaner c6 on the left draws air to the left, and the vacuum cleaner c6 on the right draws air to the right. On the one hand, this setting can clean up dust, etc., to ensure cleanliness, and on the other hand, can use the wind force to press the tablet with a certain tensile force in the left and right directions, so that the tablet pressing effect is better, and the fusion of raw materials is better for subsequent crushing.

Preferably, a corrugated surface c30 is formed on the outer peripheral surface of the annular raised block c3. The surface area can be further increased, which is also conducive to the transportation of the cooling process.

The tablet extrusion molding device in this embodiment can also be better integrated into a powder coating production line in cooperation with other devices, that is, a powder coating production line includes a tablet extrusion device for producing powder coatings according to this embodiment. The molding device, of course, also includes other devices such as a tableting guide device for draining the molten material to the tableting extrusion molding device. The various devices in this specification can be used in combination or collectively. Sex is also good.

Embodiment 4, as shown in FIG. 4 , a cooling device for producing powder coatings, comprising a conveyor belt d1 for receiving the pressed tablets formed by the tablet extrusion molding device and conveying them forward, and a conveying path of the conveyor belt d1 A cooling roller d2, which is arranged at intervals in front and back, is arranged above the upper surface of the tablet for rolling and cooling. The particularity of this embodiment lies in the fact that it is realized by rolling the cooling roller d2, which is more efficient than the air cooling in the prior art, and has a better cooling effect, and the combination of the raw materials is tighter, which is beneficial to the subsequent crushing. .

Specifically, the outer cylinder wall of the cooling roller d2 is equipped with annular reinforced cooling blocks d3 arranged at left and right intervals, and two adjacent annular reinforced cooling blocks d3 are formed to increase the cooling contact area and The cooling limit groove d4 inserted into the convex part on the upper surface of the pressing piece. This structural design is designed to match the concave-convex structure of the tablet, so that the cooling roller d2 and the tablet can be perfectly abutted and combined to conduct heat conduction, and the cooling roller d2 has high rolling heat transfer efficiency and can speed up the transportation of the tablet. .

For other practical design structures, the cooling roller d2 is provided with a cooling water pipe, and the cooling water pipe adopts a reciprocating structure, etc., and the cooling roller structure in the prior art can be used. The height of the cooling roller d2 can be adjusted up and down, that is, it can be realized by connecting with the existing lifting device, and the height can be adjusted according to the needs.

Preferably, the conveyor belt d1 is a steel crawler structure that circulates back and forth between the front and rear. The steel crawler belt can effectively cool the lower side of the pressing sheet, but the heat will still accumulate. Further, a tension roller d5 is arranged under the conveyor belt d1 to press up against the lower part of the conveyor belt d1. A cooling water pipe is provided, and the tensioning roller d5 can not only tension the conveyor belt, but also serve as a cooling roller to cool the conveyor belt and improve the overall cooling effect. Of course, the height of the tensioning roller d5 is preferably adjustable up and down.

Preferably, the left and right sides of the conveyor belt d1 are provided with limit guide wheels d6 for limiting and guiding the pressing sheet. Due to the design of the above-mentioned concave-convex structure, the requirements for positioning are relatively high, so that the guide can be better inserted and guided. Therefore, the limit guide wheel d6 can better ensure that the position of the pressing piece is relatively accurate. The limit guide wheel The d6 can use steel rollers, which can be used to dissipate heat on the side.

The cooling device of this embodiment is also an important part of powder coating production, that is, a powder coating production line, including a cooling device for producing powder coating of this embodiment, which can also be used in cooperation with other devices.

Embodiment 5, as shown in FIG. 5, a powder coating production process includes steps: s1, mixing and stirring raw materials to form a mixed material; s2, heating and melting the mixed material; s3, compressing the molten mixed material by tableting The device is used for tablet forming; s4, the tablet is cooled by a cooling roller; s5, the cooled tablet is first pulverized to form fragments; s6, the chips are pulverized and filtered to collect powder. The first four steps involved can be implemented by the device in this specification, which has very good effect. Steps s5 and s6 can be implemented by using the existing structure, and steps s1, s2 and s3 can also be implemented by using the existing structure. However, in step s4, the cooling of the tablet through the cooling roller is a special point of this process. Compared with the existing air-cooled structure, this cooling method has better efficiency and better fusion of raw materials. It will also be easier to smash.

Further improvement of the process: in step s1, the material is sanded while stirring the material; in step s3, the surface of the tablet is pressed to form a fluted structure with left and right intervals; in step s4, the cooling roller d2 The outer cylinder wall is equipped with annular reinforced cooling blocks d3 arranged at intervals on the left and right, and between two adjacent annular reinforced cooling blocks d3 are formed to increase the cooling contact area and can be inserted into the convex part of the upper surface of the pressing sheet. Cooling limit slot d4. This design is all achievable when using the devices in the previous embodiments.

Correspondingly, a powder coating production line applied to the powder coating production process is provided for the above-mentioned process, including a stirring device for producing powder coatings, a tableting guiding device, a tableting extrusion molding device, A cooling device, a coarse pulverizer m1, a fine pulverizer m2, and a filtering device m3, the cooling device includes a conveyor belt d1 for receiving the pressed tablets formed by the tablet pressing device and conveying them forward, and the conveying of the conveyor belt d1 Above the path, there are cooling rollers d2 which are arranged at intervals and are used to press against the upper surface of the tablet for rolling and cooling. The main feature is also the design of the cooling device, which can all adopt the technical features in the previous embodiments, and for the coarse pulverizer, fine pulverizer, and filter device, it is recommended to use the existing equipment, because these equipment The existing technology is relatively mature. The coarse pulverizer is a machine and equipment that is initially pulverized into particles. Generally, the millimeter level is almost the same, while the fine pulverizer can pulverize the millimeter level or even the micrometer level, which is to form a relatively fine powder coating. The devices are more diverse and can be applied to this production line.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited to this. Any person skilled in the art can easily think of various equivalents within the technical scope disclosed by the present invention. Modifications or substitutions should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

A powder coating production process is characterized in that, comprising the steps of: s1, mixing and stirring raw materials to form a mixed material; s2, heating and melting the mixed material; s3, pressing the molten mixed material into a tablet by a tableting device; s4 , the tablet is cooled by a cooling roller; s5, the cooled tablet is first pulverized to form fragments; s6, the fragments are pulverized and filtered to collect powder.
A powder coating production process according to claim 1, characterized in that, in step s1, the material is sanded while the material is being stirred.
A powder coating production process according to claim 1, characterized in that, in step s3, the surface of the tablet is pressed to form a fluted structure distributed at left and right intervals.
A powder coating production process according to claim 1, characterized in that, in step s4, the outer cylinder wall of the cooling roller (d2) is equipped with annular reinforced cooling blocks (d3) arranged at intervals on the left and right sides, Between two adjacent annular reinforced cooling blocks (d3), a cooling limiting groove (d4) is formed for increasing the cooling contact area and can be inserted into the convex portion on the upper surface of the pressing sheet.
A powder coating production line applied to the powder coating production process described in any one of claims 1-4, characterized in that it comprises a stirring device, a tableting guide device, a pressing device for producing powder coatings, which are arranged in sequence along the flow sequence of the production line. A tablet extrusion molding device, a cooling device, a coarse pulverizer, a fine pulverizer, and a filtering device, the cooling device includes a conveyor belt (d1) for receiving the tablet formed by the tablet extrusion molding device and conveying it forward, and the Above the conveying path of the conveyor belt (d1), there are cooling rollers (d2) that are arranged at intervals in front and back and are used to press against the upper surface of the tablet for rolling and cooling.
The powder coating production line according to claim 5, wherein the stirring device comprises a stirring barrel (a), a stirring shaft (a1) extending up and down and extending into the stirring barrel (a), and the stirring shaft (a1) A stirring blade (a2) for stirring the raw material is fixed on the stirring shaft (a1), and a grinding body (a3) that can rotate with the stirring shaft (a1) is also connected to the stirring shaft (a1).
A powder coating production line according to claim 6, characterized in that a three-dimensional bracket (a4) that can rotate together with the stirring shaft (a1) is fixed on the side of the stirring shaft (a1), and the three-dimensional support (a4) is fixed on the side of the stirring shaft (a1). A plurality of the abrasive bodies (a3) are assembled on the bracket (a4).
A powder coating production line according to claim 5, characterized in that, the tableting guide device comprises a feeding hopper (b), a material conveying device (b1) located under the feeding hopper (b), and a material conveying device (b1) located under the feeding hopper (b). The heating device (b2) at the outlet of the material conveying device (b1) is characterized in that a guide for guiding the molten stream is provided below the outlet of the heating device (b2), the guide A guide plate (b3) extending obliquely forward and downward is included, and a plurality of guide grooves (b01) are arranged on the upper surface of the guide plate (b3) at intervals.
A powder coating production line according to claim 8, characterized in that, the guide plate (b3) is formed with inlets connected to the upper side of all guide grooves (b01) for receiving the molten material flowing down from above. The V-shaped collection tank (b02).
A powder coating production line according to claim 5, characterized in that, the tablet extrusion molding device comprises a rear extrusion roller (c1) and a front extrusion roller (c1) located in front of and above the rear extrusion roller (c1). The extrusion roller (c2), the rear extrusion roller (c1) and the front extrusion roller (c2) are arranged at intervals and form a compression gap for the molten material to flow in and be extruded into a sheet structure, the The outer cylinder wall of the front extrusion roller (c2) is formed with annular raised blocks (c3) spaced from left to right, and an annular groove (c4) is formed between two adjacent annular raised blocks (c3).