CN110694897A - High-elasticity anti-blocking polyurethane sieve plate, manufacturing method thereof and sieving machine - Google Patents
High-elasticity anti-blocking polyurethane sieve plate, manufacturing method thereof and sieving machine Download PDFInfo
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- CN110694897A CN110694897A CN201910839158.0A CN201910839158A CN110694897A CN 110694897 A CN110694897 A CN 110694897A CN 201910839158 A CN201910839158 A CN 201910839158A CN 110694897 A CN110694897 A CN 110694897A
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- 229920002635 polyurethane Polymers 0.000 title claims abstract description 84
- 239000004814 polyurethane Substances 0.000 title claims abstract description 84
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 238000007873 sieving Methods 0.000 title abstract description 19
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 28
- 239000010959 steel Substances 0.000 claims abstract description 28
- 239000003795 chemical substances by application Substances 0.000 claims description 34
- 238000012216 screening Methods 0.000 claims description 27
- 238000001746 injection moulding Methods 0.000 claims description 10
- 238000004073 vulcanization Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 8
- 238000003466 welding Methods 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 238000005299 abrasion Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 28
- 239000011148 porous material Substances 0.000 description 16
- 239000003245 coal Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
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- 230000002035 prolonged effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
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- 239000010935 stainless steel Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
- B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
- B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
- B07B1/4618—Manufacturing of screening surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
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- Mechanical Engineering (AREA)
- Combined Means For Separation Of Solids (AREA)
Abstract
The invention discloses a high-elasticity anti-blocking polyurethane sieve plate, wherein a rigid frame shaped like a Chinese character 'tian' is arranged inside the sieve plate, a space area of the rigid frame shaped like the Chinese character 'tian' is divided by a steel wire rope, a polyurethane elastic sieve surface is arranged outside the sieve plate, a plurality of strip-shaped sieve holes which are arranged longitudinally and transversely at preset intervals are arranged on the polyurethane elastic sieve surface, openings of the strip-shaped sieve holes are inverted bell mouths with small upper surfaces and large lower surfaces, and when materials are clamped in the sieve holes, the sieve holes on the sieve plate can deform to expand towards two sides through vibration work of a sieving machine, so that the materials fall down, the sieve plate is prevented from being blocked, and the sieving efficiency. The invention also discloses a manufacturing method of the high-elasticity anti-blocking polyurethane sieve plate and a sieving machine.
Description
Technical Field
The invention relates to the technical field of screening machines, in particular to a high-elasticity anti-blocking polyurethane screen plate, a screening machine and a manufacturing method of the high-elasticity anti-blocking polyurethane screen plate.
Background
The coal resources of China are rich, the coal quality can be improved through washing and selecting, the emission of coal-fired pollutants is reduced, the utilization efficiency of the coal is improved, the energy is saved, the product structure is optimized, the product competitiveness is improved, and the transport capacity waste is reduced. The ground coal processing system is mainly composed of coal receiving, screening, crushing, coal dressing, storing, loading and the like. The screening is an operation of dividing the mixed materials with different particle sizes into various particle sizes by using a screen surface with holes.
At present, the grading sieve plates used by screening and grading equipment in the washing and sorting industry are all steel plate punching sieve plates or mesh grid sieve plates, the hole patterns comprise round holes, square holes, long holes and hexagonal holes, and the sieve plates are easy to embed into sieve holes and difficult to fall off automatically after being embedded due to the fact that the screened materials are irregular in shape and size in the actual use process. Over time, the materials blocked in the sieve holes can cause the blockage of the sieve holes of the sieve plate, so that the sieve penetration rate of the sieve plate is reduced, the sieving efficiency is reduced, and huge economic loss is caused.
Thus, there is a need for improvement in this technology.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, one object of the present invention is to provide a high elasticity anti-blocking polyurethane sieve plate, wherein the sieve pores of the sieve plate can deform during the vibrating operation of the sieving machine, so as to shake off the materials clamped in the sieve pores, and improve the sieving efficiency of the sieve plate.
Another object of the present invention is to provide a screening machine.
The invention further aims to provide a manufacturing method of the high-elasticity anti-blocking polyurethane sieve plate.
In order to achieve the above object, an embodiment of the invention provides a high-elasticity anti-blocking polyurethane sieve plate, wherein a rigid frame shaped like a Chinese character tian is arranged inside the sieve plate, a space area of the rigid frame shaped like the Chinese character tian is divided by a steel wire rope, a polyurethane elastic sieve surface is arranged outside the sieve plate, a plurality of strip-shaped sieve holes which are arranged longitudinally and transversely at preset intervals are arranged on the polyurethane elastic sieve surface, and openings of the strip-shaped sieve holes are inverted bell mouths with small upper surfaces and large lower surfaces.
Wherein, the polyurethane elastic screen surface is formed by injection molding through a mold.
According to the high-elasticity anti-blocking polyurethane sieve plate provided by the embodiment of the invention, the polyurethane elastic sieve surface is arranged outside the rigid framework in the shape of the Chinese character tian, and the polyurethane elastic sieve surface is provided with a plurality of strip-shaped sieve pores which are arranged longitudinally and transversely at preset intervals, wherein the openings of the strip-shaped sieve pores are inverted bell mouths with small upper surfaces and large lower surfaces, so that when materials are clamped in the sieve pores, the sieve pores on the sieve plate can deform and expand towards two sides through the vibration work of the sieving machine, so that the materials fall down, the sieve plate is prevented from being blocked, and the sieving efficiency is improved.
According to one embodiment of the invention, the polyurethane elastomeric screen surface is a three-component MDI elastomeric polyurethane screen surface with added abrasion resistance.
According to one embodiment of the invention, the anti-wear agent is NMJ-1 anti-wear agent.
According to one embodiment of the invention, the length-width ratio of the long strip-shaped screen hole is 2.5-3.5: 1.
According to one embodiment of the invention, the elongated holes are rectangular holes.
According to one embodiment of the invention, the taper of the inverted bell mouth is 7-14 degrees.
According to one embodiment of the invention, the rigid skeleton is a flat steel skeleton.
According to one embodiment of the invention, the steel cord is a stainless steel cord.
According to one embodiment of the invention, the sieve plate further comprises hanging lugs matched with the shape of the sieve guide rail seat, the hanging lugs are arranged on two sides of the sieve plate, and the hanging lugs are used for being connected with the guide rail seat in a buckling mode.
In order to achieve the aim, the embodiment of the invention also provides a screening machine which comprises the high-elasticity anti-blocking polyurethane screen plate.
According to the screening machine provided by the embodiment of the invention, the high-elasticity anti-blocking polyurethane screen plate is matched, when materials are clamped in the screen holes, the screen holes on the screen plate can deform and expand towards two sides through the vibration work of the screening machine, so that the materials fall down, the screen plate is prevented from being blocked, and the screening efficiency is improved.
In order to achieve the above object, another embodiment of the present invention further provides a method for manufacturing a highly elastic anti-blocking polyurethane sieve plate, comprising the following steps:
setting the size of a Chinese character 'tian' shape according to the specification of the screening machine, and welding a rigid framework of the Chinese character 'tian' shape;
the middle parts of the space areas of the rigid frameworks shaped like the Chinese character tian are transversely welded with steel wire ropes;
placing the welded steel wire rope-shaped rigid framework in a sieve plate mold, adding a polyurethane agent added with a wear-resisting agent for injection molding, wherein the molding time is 40 minutes, and removing the sieve plate mold to obtain the high-elasticity anti-blocking polyurethane sieve plate;
the wear-resisting agent is NMJ-1 wear-resisting agent, and the polyurethane is three-component MDI high-elasticity polyurethane; and the temperature of the sieve plate mold is 85 ℃, the vulcanization time is 16-24 hours, and the vulcanization temperature is 90 ℃.
According to the manufacturing method of the high-elasticity anti-blocking polyurethane sieve plate provided by the embodiment of the invention, firstly, the size of a Chinese character 'tian' shape is set according to the specification of a sieving machine, and a rigid framework of the Chinese character 'tian' shape is welded; then, transversely welding steel wire ropes at the middle part of the upper half part and the middle part of the lower half part of the T-shaped rigid framework; placing the welded steel wire rope 'tian' -shaped rigid framework into a sieve plate mold, adding a polyurethane agent added with a wear-resisting agent for injection molding, and removing the sieve plate mold after 40 minutes of molding time to obtain the high-elasticity anti-blocking polyurethane sieve plate, wherein the wear-resisting agent is an NMJ-1 wear-resisting agent, and the polyurethane is three-component MDI high-elasticity polyurethane; and the temperature of the sieve plate mold is 85 ℃, the vulcanization time is 16-24 hours, and the vulcanization temperature is 90 ℃. Thereby the wearability of this sieve is better, prolongs the life of sieve to, when the material card was in the sieve mesh, the vibration work of sieve mesh accessible screening machine on the sieve took place to warp to both sides expansion, thereby made the material whereabouts, in order to prevent that the sieve from blockking up, improved screening efficiency.
According to one embodiment of the invention, the ratio of the anti-wear agent to the polyurethane agent is 5: 1000.
Compared with the prior art, the invention has the following beneficial effects: (1) the steel wire ropes and the rigid frameworks are embedded in the sieve plate, so that the elastic sieve surface is divided into independent elastic areas, the appearance of the sieve plate has certain rigidity, and the sieve plate is convenient to support and fixedly mount; (2) the sieve pores are arranged into long strips, so that the relaxation of the sieve pores is easy to deform in the short axis direction in the vibrating working process of the sieving machine, and blocked materials are shaken off to prevent the sieve pores from being blocked; (3) the sieve holes are arranged to be inverted horn mouths, so that blocked materials can fall down only when deformation occurs above the sieve holes, and the screening efficiency of the sieve plate is improved; (4) for the elastic screen surface, three-component polyurethane is selected for injection molding, so that the elasticity of the screen surface is higher; (5) the wear-resistant agent is added into the three-component polyurethane, so that the sieve plate is more wear-resistant, and the service life of the sieve plate is prolonged; (6) because the specific gravity of the polyurethane is only one sixth of that of steel, the weight of the finished product is only one fourth of that of the traditional steel plate punching sieve plate by adding the rigid framework pre-embedded in the polyurethane sieve plate, and the polyurethane has a high elastic noise reduction function, so that the weight of the sieve plate is light, the labor intensity of workers in carrying is reduced, the noise is low, the working environment is improved, the working load of the vibrating sieve is reduced due to the reduction of the weight and the ground, and the running cost is reduced.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which,
FIG. 1 is a top view of a highly resilient anti-clogging polyurethane screen deck according to an embodiment of the present invention;
FIG. 2 is a sectional view taken along line A-A of FIG. 1;
fig. 3 is a partially enlarged view of a portion B in fig. 2;
figure 4 is a block schematic diagram of a screening machine according to an embodiment of the present invention;
fig. 5 is a flow chart of a method of making a highly elastic anti-clogging polyurethane screen panel according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a rigid skeleton structure in the method for manufacturing a high-elasticity anti-blocking polyurethane sieve plate according to the embodiment of the invention;
fig. 7 is a top view of an injection mold for a method of making a highly resilient anti-clogging polyurethane screen deck according to an embodiment of the present invention;
FIG. 8 is a right side view of FIG. 7;
fig. 9 is a front view of fig. 7.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
The following describes a high-elasticity anti-blocking polyurethane sieve plate, a sieving machine comprising the same and a manufacturing method of the high-elasticity anti-blocking polyurethane sieve plate according to embodiments of the invention with reference to the accompanying drawings.
Specifically, as shown in fig. 1-3, on the one hand, the invention provides a high-elasticity anti-blocking polyurethane sieve plate 100, a rigid framework 1 shaped like a Chinese character tian is arranged inside the sieve plate 100, a spatial region of the rigid framework 1 shaped like the Chinese character tian is divided by a steel wire rope 2, a polyurethane elastic sieve surface 3 is arranged outside the sieve plate 100, a plurality of strip-shaped sieve pores 4 arranged longitudinally and transversely at preset intervals are arranged on the polyurethane elastic sieve surface 3, and openings of the strip-shaped sieve pores 4 are inverted bell mouths 5 with small upper parts and large lower parts.
It should be noted that the preset distance (transverse distance) between each strip-shaped sieve pore 4 may be 15mm, the rigid framework 1 may be a flat steel framework, the side length is 610mm, and the steel wire rope 2 is a stainless steel wire rope. Wherein, the polyurethane elastic screen surface is formed by injection molding through a mold. Preferably, the polyurethane elastic screen surface is a three-component MDI high-elasticity polyurethane screen surface added with an anti-wear agent. Preferably, the anti-wear agent is NMJ-1 anti-wear agent. The anti-wear agent is a compound of fluorine and silicon, and may be added to the polyurethane at a ratio of five parts per thousand, for example.
It can be understood that the screen surface 3 is made of high-elasticity three-component polyurethane added with a wear-resistant agent, the frame of the flat steel framework 1 and the longitudinal and transverse stainless steel wire ropes 2 are pre-embedded in the screen surface, the screen surface is divided into 2 or 4 independent elastic areas, so that the screen plate 100 has certain rigidity and is convenient to support, mount and fix, and the screen surface forms 2 or 4 independent elastic screen areas. As shown in fig. 1 and 6, the flat steel framework 1 is divided into 16 independent elastic regions by two transverse steel cables 2 and two longitudinal steel cables 2. The installation adopts the method of the non-bolt snap fastener (as shown in figure 2), and the disassembly and the replacement are convenient and quick. Because the sifter 3 has adopted high-elastic polyurethane injection moulding's rectangular shape sieve mesh 4 to arrange sifter 3, and every rectangular shape sieve mesh 4 is the big 5 types of the big end down of the face, the material whereabouts of being convenient for when the material screening passes through, when meetting the material that blocks the card because the high elasticity of polyurethane makes rectangular shape sieve mesh 4 warp, in addition along with the shale shaker face of screening machine 200 produces the secondary relaxation shake and beats with the material of the face above-mentioned beat and hit and beat the material that will block and shake down to the effect that the screening was passed through the sieve has been played. Avoids the blockage of the screen seams and further improves the screening effect of the materials.
Preferably, the length-width ratio of the elongated screen holes 4 is 2.5-3.5: 1.
Preferably, the elongated screen openings 4 are rectangular screen openings.
Preferably, as shown in fig. 3, the taper of the inverted bell mouth 5 is 7 to 14 degrees.
Further, as shown in fig. 2, the screen plate 100 further includes hanging lugs 6 matching with the shape of the screen guide rail seat, the hanging lugs 6 are disposed on two sides of the screen plate 100, and the hanging lugs 6 are used for being connected with the guide rail seat in a snap-fit manner.
That is, the lugs 6 are also injection molded integrally with the polyurethane during the injection molding of the screen surface 3. In the actual installation process, the hanging lugs 6 are directly buckled on the guide rail seat of the screening machine, and the installation is simple and convenient.
In summary, according to the high-elasticity anti-blocking polyurethane sieve plate provided by the embodiment of the invention, the elastic sieve surface can be arranged on the rigid framework shaped like a Chinese character tian, and the elastic sieve surface is provided with a plurality of strip-shaped sieve pores which are arranged longitudinally and transversely at preset intervals, wherein the openings of the strip-shaped sieve pores are inverted bell mouths with small upper surfaces and large lower surfaces, so that when materials are clamped in the sieve pores, the sieve pores on the sieve plate can deform and expand towards two sides through the vibration work of the sieving machine, so that the materials fall down, the sieve plate is prevented from being blocked, and the sieving efficiency is improved.
In order to achieve the above purpose, as shown in fig. 4, the present invention further provides a screening machine 200, including a high elasticity anti-blocking polyurethane screen plate 100, wherein the screening machine 200 may be a mining vibrating screen machine.
In summary, according to the sieving machine provided by the embodiment of the invention, by matching the high-elasticity anti-blocking polyurethane sieve plate, when the material is clamped in the sieve holes, the sieve holes on the sieve plate can deform and expand towards two sides through the vibration work of the sieving machine, so that the material falls down, the sieve plate is prevented from being blocked, and the sieving efficiency is improved.
In order to achieve the above object, as shown in fig. 5, another embodiment of the present invention provides a method for manufacturing a highly elastic anti-blocking polyurethane screen plate, which includes the following steps:
s1, setting the size of a Chinese character 'tian' shape according to the specification of the screening machine, and welding a Chinese character 'tian' shaped rigid framework, wherein the rigid framework can be a flat steel framework;
s2, transversely welding steel wire ropes in the middle of the upper half part and the middle of the lower half part of the rigid framework in the shape of the Chinese character tian, wherein the steel wire ropes can be stainless steel wire ropes;
s3, placing the welded steel wire rope-shaped rigid framework in a sieve plate mold, adding a polyurethane agent added with a wear-resisting agent for injection molding, wherein the molding time is 40 minutes, and removing the sieve plate mold to obtain a high-elasticity anti-blocking polyurethane sieve plate;
wherein, the wear-resisting agent is NMJ-1 wear-resisting agent, and the polyurethane is three-component MDI high-elasticity polyurethane; and the temperature of the sieve plate mold is 85 ℃, the vulcanization time is 16-24 hours, and the vulcanization temperature is 90 ℃.
Wherein the mold structure of the screen plate is shown in fig. 7-9.
According to one embodiment of the invention, the ratio of anti-wear agent to polyurethane agent is 5: 1000.
In summary, according to the method for manufacturing the high-elasticity anti-blocking polyurethane sieve plate provided by the embodiment of the invention, firstly, the size of a Chinese character tian is set according to the specification of the sieving machine, and a rigid framework of the Chinese character tian is welded; then, transversely welding steel wire ropes at the middle parts of the space areas of the rigid frameworks shaped like the Chinese character tian; placing the welded steel wire rope into a sieve plate mold, adding a polyurethane agent added with a wear-resisting agent for injection molding, and removing the sieve plate mold after 40 minutes of molding time to obtain a high-elasticity anti-blocking polyurethane sieve plate, wherein the wear-resisting agent is an NMJ-1 wear-resisting agent, and the polyurethane is three-component MDI high-elasticity polyurethane; and the temperature of the sieve plate mold is 85 ℃, the vulcanization time is 16-24 hours, and the vulcanization temperature is 90 ℃. Thereby the wearability of this sieve is better, prolongs the life of sieve to, when the material card was in the sieve mesh, the vibration work of sieve mesh accessible screening machine on the sieve took place to warp to both sides expansion, thereby made the material whereabouts, in order to prevent that the sieve from blockking up, improved screening efficiency.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
For this reason, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, etc., unless explicitly specified otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in interactive relationship with each other unless otherwise specifically limited. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a lesser level than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example" or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. The utility model provides a polyurethane sieve is prevented blockking up by high elasticity, its characterized in that, the inside rigidity "field" font skeleton that is equipped with of sieve, and the spatial region of rigidity "field" font skeleton is cut apart by wire rope, the sieve outside is provided with polyurethane elasticity sifting surface, be equipped with on the polyurethane elasticity sifting surface with predetermineeing a plurality of rectangular shape sieve meshes of interval range vertically and horizontally, the opening of rectangular shape sieve mesh is big under little for the higher authority's the horn mouth that falls.
2. The high elasticity anti-clogging polyurethane sieve plate of claim 1, wherein the length-width ratio of the elongated screen holes is 2.5-3.5: 1.
3. The highly elastic anti-clogging polyurethane screen plate according to claim 1 or 2, wherein the elongated screen holes are rectangular screen holes.
4. The highly elastic anti-clogging polyurethane screen plate according to claim 1, wherein the taper of the inverted bell mouth is 7 to 14 degrees.
5. The highly elastic anti-clogging polyurethane screen deck according to claim 1, wherein said rigid frame is a flat steel frame.
6. The highly elastic anti-clogging polyurethane screen panel of claim 1, wherein the wire rope is a stainless steel wire rope.
7. The high elasticity anti-clogging polyurethane sieve plate of claim 1, wherein the sieve plate further comprises lugs matching the shape of the sieve guide rail seat, the lugs are arranged on both sides of the sieve plate, and the lugs are used for being buckled with the guide rail seat.
8. A screening machine comprising the highly elastic anti-clogging polyurethane screen panel of any one of claims 1-7.
9. The manufacturing method of the high-elasticity anti-blocking polyurethane sieve plate is characterized by comprising the following steps of:
setting the size of a Chinese character 'tian' shape according to the specification of the screening machine, and welding a rigid framework of the Chinese character 'tian' shape;
the middle parts of the space areas of the rigid frameworks shaped like the Chinese character tian are transversely welded with steel wire ropes;
placing the welded steel wire rope-shaped rigid framework in a sieve plate mold, adding a polyurethane agent added with a wear-resisting agent for injection molding, wherein the molding time is 40 minutes, and removing the sieve plate mold to obtain the high-elasticity anti-blocking polyurethane sieve plate;
the wear-resisting agent is NMJ-1 wear-resisting agent, and the polyurethane is three-component MDI high-elasticity polyurethane; and the temperature of the sieve plate mold is 85 ℃, the vulcanization time is 16-24 hours, and the vulcanization temperature is 90 ℃.
10. The method of claim 1, wherein the ratio of the abrasion resistant agent to the polyurethane agent is 5: 1000.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN113909110A (en) * | 2021-10-14 | 2022-01-11 | 安徽昊华环保科技有限公司 | High-strength wear-resistant polyurethane sieve plate |
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