A polyurethane casting device for mining screen plates

Abstract

The present application relates to polyurethane sieve plate manufacturing technology field, specifically disclose a kind of mining sieve plate polyurethane pouring device, including track frame, tank, pouring mold and pouring assembly, pouring mold is along the upper end of track frame and is moved to be arranged, pouring assembly is arranged in the just above of pouring mold moving path and is connected with tank by feeding device, rack is arranged in the just below of track frame downstream of pouring assembly, rack is arranged on the above of rack and is provided with moving frame, and rack is provided with the drive assembly that realizes the reciprocating movement of moving frame along the above of rack, the lower end of moving frame is rotatably connected with the rotation body perpendicular to rack;Pouring device disclosed in the application not only realizes the continuous pouring of polyurethane sieve plate, improves the production efficiency of sieve plate, and simultaneously solves the problem that bubble exists in pouring raw material and residual material is left on the upper surface of die piece or module in mold, its structure design is novel, and operation effect is excellent.

Description

Technical Field

[0001] This invention relates to the field of polyurethane screen plate manufacturing technology, and specifically discloses a polyurethane casting device for mining screen plates. Background Technology

[0002] Mining screens are mesh structural elements used for screening and filtration. To improve their long-term wear resistance, they are often molded from polyurethane using appropriate molds. Currently, polyurethane screen casting still employs the traditional manual method. Workers use a casting gun or discharge pipe to evenly pour raw materials from a container into a mold, which then cures and is demolded. However, this manual method is inefficient, labor-intensive, and cannot guarantee the consistency of the resulting polyurethane screens.

[0003] Utility model patent application number 2022232173409 discloses a polyurethane screen casting machine, including a base plate, a polyurethane casting machine, a casting hose, a casting platform, a casting pipe, and casting heads. The polyurethane casting machine and the casting platform are both located on the top of the base plate. The output end of the polyurethane casting machine is connected to one end of the casting hose, and the other end of the casting hose is connected to the output end of the casting pipe. Multiple sets of discharge ports are provided at the bottom of the casting pipe, and each set of discharge ports is equipped with a casting head. The machine also includes a moving mechanism, which is located on the top of the casting platform. The casting pipe is mounted on the moving mechanism. This polyurethane screen casting machine injects raw material into the casting pipe through the casting hose. The raw material entering the casting pipe flows evenly onto the casting platform through multiple sets of casting heads. Simultaneously, the moving mechanism is activated, causing the casting pipe to move left and right above the casting platform, thus achieving uniform casting of raw material onto the casting platform. The entire process can be operated by one person. However, the polyurethane screen casting machine still has some shortcomings in the casting process: First, due to the fixed setting of the casting platform, the raw material still needs a period of time to solidify and form before demolding after casting, which makes continuous casting impossible and seriously affects the production efficiency of mining polyurethane screen plates; Second, during the casting process, the air inside the mold cannot be effectively discharged, resulting in a certain amount of air bubbles in the cast material, which affects the quality of the screen plate after solidification; Third, during the automatic casting process, some raw material will remain on the upper surface of the mold pieces or modules in the mold, which still needs to be scraped off by operators after casting, increasing the workload of operators. Based on the above-mentioned shortcomings of the existing polyurethane screen casting machine, this application proposes a polyurethane casting device for mining screen plates that can effectively solve the above-mentioned technical problems. Summary of the Invention

[0004] The present invention aims to provide a polyurethane casting device for mining screen plates, so as to solve three shortcomings of existing polyurethane screen casting machines in the process of manufacturing mining polyurethane screen plates.

[0005] This invention is achieved through the following technical solution:

[0006] A polyurethane casting device for mining screen plates includes a track frame, a material tank, a casting mold, and a casting assembly. The casting mold is movable along the upper end of the track frame, and the casting assembly is located directly above the moving path of the casting mold and is connected to the material tank through a feeding device.

[0007] A rack is located directly below the track frame downstream of the casting assembly. A movable frame is located on the track frame above the rack, and a drive assembly is provided on the track frame to enable the movable frame to reciprocate along the top of the rack. The lower end of the movable frame is rotatably connected to a rotating body perpendicular to the rack, and a gear meshing with the rack is provided on the roller shaft at the end of the rotating body. A magnetic element is provided on the outer circumference of the rotating body. A push rod acting on the lower surface of the casting mold is inserted on the movable frame directly above the rotating body. A magnetic attraction element interacting with the magnetic element is provided at the lower end of the push rod, and a spring is connected between the magnetic attraction element and the movable frame. A second telescopic drive element is provided at the upper end of the movable frame, and a scraper extending into the casting mold is connected to the lower end of the second telescopic drive element.

[0008] The polyurethane casting device for mining screens disclosed in this invention moves the casting mold along the track frame at a constant speed during operation. When the casting mold moves to the position of the casting component, the feeding device is activated to uniformly pour the raw material in the material tank into the casting mold from the casting component.

[0009] After the casting mold is completed and moved directly above the rack, it is fixed in place. At this time, another casting mold can perform the previous casting action to achieve continuous operation. Simultaneously, the drive assembly drives the moving frame to move along the rack. During the movement of the moving frame, the meshing transmission between the gear and the rack causes the rotating body to rotate. During the rotation of the rotating body, the magnetic components on its outer surface first approach the magnetic attraction component and then move away from it. Through the magnetic attraction, the impact rod moves downward and stretches the spring. After the magnetic force disappears, the impact rod is launched upward under the action of the spring potential energy. The launched impact rod continuously impacts the lower surface of the casting mold after casting, thereby causing the casting mold to vibrate at high frequency, quickly eliminating air bubbles inside and achieving automatic leveling of the raw material in the casting mold. At the same time, during the movement of the moving frame, the scraper extends into the casting mold to scrape off the excess material remaining on the surface of the mold pieces or modules, preventing the excess material from solidifying on the mold pieces or modules and affecting the quality of the final screen plate.

[0010] As a further feature of the above scheme, multiple impact rods inserted on the movable frame are arranged in a row, and the lower ends of the multiple impact rods are connected to a base strip. The spring is arranged between the base strip and the movable frame. The magnetic component is a magnetic strip arranged on the lower surface of the base strip, and the magnetic component is a magnetic strip arranged along the axis of the rotating body.

[0011] As a further provision of the above solution, the multiple impact rods inserted on the movable frame are arranged in a row, the magnetic attraction component is a magnetic block set at the lower end of the impact rod, the spring is set between the magnetic block and the movable frame, and the magnetic component is multiple magnets, which are arranged in a spiral shape on the outer surface of the rotating body, and the multiple magnets are respectively set to correspond to the magnetic blocks at the lower end of the multiple impact rods.

[0012] As a further feature of the above scheme, the movable frame includes side strips arranged on the front and rear outer sides of the track frame. The rollers at both ends of the rotating body are rotatably connected to the lower ends of the two side strips respectively. A longitudinal plate is connected between the two side strips. The longitudinal plate has through holes that match multiple impact rods, and sliding hole protrusions and screw hole protrusions are fixed on the longitudinal plate.

[0013] As a further provision of the above solution, the drive assembly includes a screw connected to the screw hole protrusion, and one end of the screw is connected to a screw motor. A slide rod passes through the slide hole protrusion, and both ends of the slide rod are fixedly connected to the track frame.

[0014] As a further feature of the above scheme, the track frame includes two rows of supports, each row of supports is connected to a wheel groove track at its top, and the front and rear sides of the casting mold are provided with a row of rollers that match the wheel groove track.

[0015] As a further provision of the above scheme, the casting assembly includes a fixedly mounted stand, a vertical slot is provided on the side of the stand, a movable block is provided in the vertical slot, a first telescopic drive member connected to the movable block is provided at the upper end of the stand, a casting pipe is connected to the movable block and is arranged perpendicular to the movement path of the casting mold, and a plurality of casting nozzles facing the casting mold are arranged at intervals on the lower surface of the casting pipe.

[0016] As a further provision of the above scheme, the feeding device includes a conveying pump connected to the bottom of the material tank, and a conveying pipe is connected between the discharge end of the conveying pump and the pouring pipe.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] The polyurethane casting device for mining screens disclosed in this invention moves the casting mold on the track frame during operation. After the raw material in the casting mold is poured, the next casting mold can be pushed to the casting station immediately, thereby realizing continuous casting of polyurethane screens and greatly improving the production efficiency of polyurethane screens for mining.

[0019] In this invention, after the raw material is poured, the casting mold moves along the track frame. During the movement of the moving frame, the rotation of the rotating body is achieved through the meshing transmission between gears and racks. This causes the magnetic components on the rotating body to first approach the magnetic attracting components and then move away from them. Through the aforementioned magnetic force, the impact rod continuously strikes the lower surface of the casting mold, causing the casting mold to vibrate at high frequency, quickly eliminating internal air bubbles and achieving automatic leveling of the raw material in the casting mold. At the same time, during the movement of the moving frame, the scraper can simultaneously scrape off the excess material remaining on the surface of the mold pieces or modules in the mold, improving the final product quality. The above structural design solves the problems of air bubbles in the poured raw material and excess material remaining on the surface of the mold pieces or modules in the mold. Its structural design is novel and its operation is excellent. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention from a first angle;

[0022] Figure 2 This is a schematic diagram of the second-angle three-dimensional structure of the present invention;

[0023] Figure 3 This is a three-dimensional structural diagram of the material tank, support, wheel groove track, etc. in this invention.

[0024] Figure 4 This is a three-dimensional structural diagram of the casting mold in this invention;

[0025] Figure 5 For the present invention Figure 3 Enlarged structural diagram at point A;

[0026] Figure 6 This is a schematic diagram of the three-dimensional structure of the movable frame, rotating body, etc. in Embodiment 1 of the present invention;

[0027] Figure 7 This is a schematic diagram of the three-dimensional structure of the movable frame, rotating body, etc. in Embodiment 2 of the present invention. Detailed Implementation

[0028] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The following will refer to the appendix... Figures 1-7 This application will be described in detail with reference to the embodiments. Example 1

[0030] Example 1 discloses a polyurethane casting device for mining screen plates, see attached figure. Figure 1-5 The system includes a base plate 1, a material tank 2, and a casting mold 3. Two rows of parallel supports 4 are provided on the upper surface of the base plate 1. Wheel groove tracks 5 are welded to the upper ends of the two supports 4. The casting mold 3 is then placed between the front and rear wheel groove tracks 5. A row of rollers 301 matching the wheel groove tracks 5 is provided on the front and rear sides of the casting mold 3.

[0031] The length of the entire groove track 5 is greater than the lateral length of the two casting molds 3. The material tank 2 is placed on the base plate 1 behind the left side of the groove track 5. A filling pipe is provided on one side of the upper end of the material tank 2 to allow for timely replenishment of raw materials. A material pump 6 is connected to the lower end of the material tank 2, and a material conveying pipe 7 is connected to the discharge end of the material pump 6. A stand 8 is fixed on the base plate 1 behind the left side of the groove track 5. A vertical slot is opened on the upper side of the stand 8 facing the casting mold 3, and a moving block 9 is set in the vertical slot. A first telescopic drive 10 is set on the upper end of the stand 8 and connected to the moving block 9. A casting pipe 11 is connected to the outer side of the moving block 9, which is perpendicular to the two groove tracks 5. The end of the material conveying pipe 7 is connected to the casting pipe 11. Multiple casting nozzles 12 facing the casting mold 3 are arranged at intervals on the lower surface of the casting pipe 11. During the casting operation, the casting mold 3 can be pushed manually or by other driving components (not shown in the figure) to move slowly and uniformly from left to right along the direction of the wheel groove track 5. At the same time, the material pump 6 draws the raw material from the material tank 2 and then delivers it to the casting pipe 11. Finally, multiple casting nozzles 12 evenly pour the raw material into the casting mold 3, so as to achieve uniform pouring of raw material in the casting mold 3.

[0032] Reference Appendix Figure 1 Appendix Figure 2and attached Figure 4 Two racks 13 parallel to the wheel groove track 5 are fixed on the upper surface of the base plate 1 directly below the right side of the wheel groove track 5, and the length of the racks 13 is not less than the transverse length of the casting mold 3. Longitudinal plates 14 are fixed between the front and rear supports 4 directly above the two ends of the racks 13. Parallel sliding rods 15 and screws 16 are arranged between the two longitudinal plates 14, and a screw motor 17 is connected to one end of the screw 16.

[0033] Reference Appendix Figure 1 and attached Figure 5 The movable frame 18 above the rack 13 includes side strips 181 arranged on the outer sides of the front and rear rows of brackets 4. A connecting strip 182 is arranged in the middle of the two side strips 181. A row of through holes is opened on the connecting strip 182. Then, an impact rod 183 acting on the lower surface of the casting mold 3 is inserted into each through hole. Then, a bottom strip 184 arranged perpendicular to the rack 13 is connected to the lower end of the row of impact rods 183. A spring 185 is arranged between the bottom strip 184 and the connecting strip 182. Then, a magnetic strip 188 is arranged on the lower surface of the bottom strip 184. Meanwhile, two protrusions 186 are fixedly installed on the side strip 181. One of the protrusions 186 has a slider that matches the slide bar 15, and the other protrusion 186 has a threaded hole that matches the screw 16. This allows the moving frame 18 to move laterally above the rack 13 through the interaction between the screw 16 and the threaded hole during the rotation of the screw 16 driven by the screw motor 17.

[0034] A rotating body 19 is provided between the lower ends of the two side strips 181. Both ends of the rotating body 19 are provided with rollers 20 that are rotatably connected to the lower ends of the movable frame 18. Gears 21 that mesh with corresponding racks 13 are provided on the rollers 20. Simultaneously, magnetic strips 22 are provided on the outer circumference of the rotating body 19, arranged along its axial direction. In this embodiment, two magnetic strips 22 are provided on the rotating strip 19, located at the upper and lower ends of the outer circumference of the rotating body 19, respectively.

[0035] Finally, a second telescopic drive member 23 is provided at the upper end of each side strip 181, and a scraper strip 24 is connected to the lower end of the two second telescopic drive members 23. A scraper 25 that can extend into the casting mold 3 is fixed on the lower surface of the scraper strip 24, and the length of the scraper 25 is slightly smaller than the inner width of the casting mold 3.

[0036] In the polyurethane casting device for mining screens disclosed in Embodiment 1, during the production process of casting polyurethane screens, the casting mold 3 is raised to be flush with the two wheel groove tracks 5 by a lifting device, and then sent into the two wheel groove tracks 5. Subsequently, the casting mold 3 is moved slowly and uniformly from left to right by manual pushing or other driving components. When the right end of the casting mold 3 reaches the position of the casting pipe 11, the feed pump 6 is started to extract the raw material from the material tank 2, and then the raw material is evenly poured into the casting mold 3 by the pouring nozzle 12 on the casting pipe 11 until the left end of the casting mold 3 reaches the position of the casting pipe 11, at which point the feed pump 6 is directly turned off to stop the casting.

[0037] After the casting mold 3 is completed, it is pushed along the wheel groove track 5 to a position aligned vertically with the rack 13. At this time, the next set of casting mold 3 can be cast. Simultaneously, the screw motor 17 is started. Under the action of the screw 17 and the threaded hole on the protrusion 186, the moving frame 18 moves along the direction of the rack. During the movement of the moving frame 18, due to the meshing transmission between the gear 21 and the rack 13, the rotating body 19 will rotate synchronously in the moving frame 18. During the rotation of the rotating body 19, the magnetic strip 22 will first approach the magnetic suction strip 188 to attract and pull all the impact rods 183 downward and overcome the action of the spring 185. Then, after the magnetic strip 22 moves away from the magnetic suction strip 188 to one side, under the action of the potential energy of the spring 185, all the impact rods 183 will be instantly pushed upward and hit the lower surface of the casting mold 3, thereby causing the raw material poured inside the casting mold 3 to vibrate, effectively eliminating internal air bubbles and achieving automatic leveling. Meanwhile, during the movement of the moving frame 18, the scraper 25 will extend into the casting mold 3 to scrape off the residual raw material on the surface of the mold or module inside the casting mold 3, so as to avoid affecting the surface quality of the final formed polyurethane screen plate. Example 2

[0038] Example 2 discloses a polyurethane casting device for mining screen plates based on the technical solution in Example 1, with local optimization design. The similarities between Example 2 and Example 1 will not be described again.

[0039] Reference Appendix Figure 7 In this embodiment 2, a movable frame 18 is located above the rack 13. The movable frame 18 includes side strips 181 arranged on the outer sides of the front and rear rows of supports 4. A connecting strip 182 is provided at the middle position of the two side strips 181. A row of through holes is formed on the connecting strip 182, and an impact rod 183 acting on the lower surface of the casting mold 3 is inserted into each through hole. A magnetic block 187 is connected to the lower end of each impact rod 183, and a spring 185 is placed between the magnetic block 187 and the connecting strip 182.

[0040] A rotating body 19 is provided between the lower ends of the two side strips 181. Both ends of the rotating body 19 are provided with rollers 20 that are rotatably connected to the lower end of the movable frame 18, and gears 21 that mesh with the corresponding racks 13 are provided on the rollers 20. Magnets 26 corresponding to each magnetic block 187 are evenly provided on the rotating body 19, and the multiple magnets 26 are arranged in a spiral shape on the outer circumference of the rotating body 19.

[0041] In this embodiment 2, through the above-mentioned improved design, the moving frame 18 drives the rotating body 19 to rotate during the movement through the meshing action between the gear 21 and the rack 13. During the rotation of the rotating body 19, the magnets 26 arranged in a spiral shape on the rotating body 19 will attract the corresponding magnetic blocks 187 to move downward and stretch the spring 185 to store its potential. Then, after the magnets 26 move away from the magnetic blocks 187, the impact rods 183 will be pushed upward instantly under the action of the potential energy of the spring 185 and impact the lower surface of the casting mold 3. Furthermore, a row of impact rods 183 can impact the casting mold 3 in a row. In addition, the lateral movement process can quickly eliminate the air bubbles inside the raw material through the high-frequency impact action of each part and achieve automatic leveling.

[0042] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A mining screen deck polyurethane casting device, characterized by, Including track frame, material tank, pouring mold and pouring assembly, the pouring mold is arranged along the upper end of the track frame, the pouring assembly is arranged above the moving path of the pouring mold and is connected with the material tank through the feeding device; The rack is arranged below the track frame downstream of the pouring assembly, the moving frame is arranged above the rack, the driving assembly for realizing the reciprocating movement of the moving frame above the rack is arranged on the track frame, the lower end of the moving frame is rotatably connected with the rotating body perpendicular to the rack, the roller shaft at the end of the rotating body is provided with the gear engaged with the rack, the outer circular surface of the rotating body is provided with the magnetic member, the moving frame above the rotating body is provided with the ejector rod acting on the lower surface of the pouring mold, the lower end of the ejector rod is provided with the magnetic attraction member acting with the magnetic member, the magnetic attraction member and the moving frame are connected with the spring, the upper end of the moving frame is provided with the second telescopic driving member, the lower end of the second telescopic driving member is connected with the scraper extending into the pouring mold.

2. The mining screen deck polyurethane pouring apparatus of claim 1, wherein, The multiple ejector rods arranged on the moving frame are arranged in rows, the lower ends of the multiple ejector rods are connected with the bottom strip, the spring is arranged between the bottom strip and the moving frame, the magnetic attraction member is the magnetic attraction strip arranged on the lower surface of the bottom strip, and the magnetic member is the magnetic strip arranged along the axis direction of the rotating body.

3. The mining screen deck polyurethane pouring apparatus of claim 1, wherein, The multiple ejector rods arranged on the moving frame are arranged in rows, the magnetic attraction member is the magnetic attraction block arranged at the lower end of the ejector rod, the spring is arranged between the magnetic attraction block and the moving frame, and the magnetic member is the multiple magnets arranged in a spiral on the outer circular surface of the rotating body.

4. A polyurethane casting device for mine screens according to claim 2 or 3, characterised in that, The moving frame includes the side strips arranged on the front and rear outer sides of the track frame, the roller shafts at the two ends of the rotating body are rotatably connected with the lower ends of the two side strips, the longitudinal strip plate is connected between the two side strips, the through holes matched with the multiple ejector rods are formed in the longitudinal strip plate, and the slide hole protrusion and the screw hole protrusion are fixed on the longitudinal strip plate.

5. The mining screen deck polyurethane pouring apparatus of claim 4, wherein, The driving assembly includes the screw rod connected with the screw hole protrusion, one end of the screw rod is connected with the screw rod motor, the slide rod penetrates through the slide hole protrusion, and the two ends of the slide rod are fixedly connected with the track frame.

6. The mining screen deck polyurethane pouring apparatus of claim 1, wherein, The track frame includes the front and rear rows of supports, the top ends of each row of supports are connected with the wheel groove tracks, and the front and rear sides of the pouring mold are provided with the rows of rollers matched with the wheel groove tracks.

7. The mining screen deck polyurethane pouring apparatus of claim 1, wherein, The pouring assembly includes the fixedly arranged vertical seat, the vertical slot is formed in the side surface of the vertical seat, the moving block is arranged in the vertical slot, the upper end of the vertical seat is provided with the first telescopic driving member connected with the moving block, the moving block is connected with the pouring pipe arranged perpendicular to the moving path of the pouring mold, and the lower surface of the pouring pipe is provided with the multiple pouring nozzles arranged towards the pouring mold.

8. The mining screen deck polyurethane pouring apparatus of claim 7, wherein, The feeding device includes the material conveying pump connected with the bottom of the material tank, and the material conveying pipe is connected between the discharge end of the material conveying pump and the pouring pipe.

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