CN113334658A - Production process of ceramic bead wear-resistant conveying belt - Google Patents
Production process of ceramic bead wear-resistant conveying belt Download PDFInfo
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- CN113334658A CN113334658A CN202110617707.7A CN202110617707A CN113334658A CN 113334658 A CN113334658 A CN 113334658A CN 202110617707 A CN202110617707 A CN 202110617707A CN 113334658 A CN113334658 A CN 113334658A
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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
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
- B29C39/10—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. casting around inserts or for coating articles
-
- 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
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/22—Component parts, details or accessories; Auxiliary operations
-
- 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
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/22—Component parts, details or accessories; Auxiliary operations
- B29C39/44—Measuring, controlling or regulating
-
- 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
- B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
- B29C67/24—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 characterised by the choice of material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/709—Articles shaped in a closed loop, e.g. conveyor belts
- B29L2031/7092—Conveyor belts
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Delivering By Means Of Belts And Rollers (AREA)
- Belt Conveyors (AREA)
Abstract
The invention relates to a production process of a ceramic bead wear-resistant conveying belt, which comprises the following steps: preparing, namely cleaning, drying and dip-coating the ceramic beads with the same ball diameter with an adhesive: placing the adhesive tape in an oven for heating: pouring ceramic beads coated with the adhesive, and drying for later use; taking a polyurethane prepolymer, adding mocha and ceramic beads at the same time, and uniformly stirring to obtain a pre-injected body: vacuumizing the pre-injection body and pouring the pre-injection body on the surface of the adhesive tape through a mould to form a ceramic bead polyurethane wear-resistant layer: carrying out primary vulcanization on the obtained conveying belt, grooving the joint of the ceramic bead polyurethane wear-resistant layer, and cleaning with trichloroethylene: carrying out secondary vulcanization on the conveying belt; polishing the surface of the vulcanized ceramic bead polyurethane wear-resistant layer to finish the manufacture; the invention has the advantages of simple process, high flexibility, uniform wear resistance and long service life.
Description
Technical Field
The invention belongs to the technical field of belt conveyor belts, and particularly relates to a production process of a ceramic bead wear-resistant conveyor belt.
Background
The rubber belt conveyor is widely applied to various industries such as household appliances, electronics, electrical appliances, machinery, tobacco, injection molding, post and telecommunications, printing, food and the like, the assembly, detection, debugging, packaging, transportation and the like of objects are realized, the conveying capacity is strong, the conveying distance is long, the structure is simple and easy to maintain, the programmed control and the automatic operation can be conveniently realized, the continuous or intermittent motion of a conveying belt is used for conveying the objects below 100KG or powdery and granular objects, the operation is high-speed, stable and low in noise, and the objects can be conveyed up and down a slope, but the service life of the rubber belt is greatly shortened due to the frequent abrasion of an overflow-proof apron plate of a guide chute in the working process of the rubber belt conveyor with short conveying distance, and the waste in the aspects of equipment investment, maintenance and shutdown is caused to enterprises; in the prior art, a ceramic block or a ceramic wafer is usually additionally arranged on a rubber coating layer for prolonging the service life of an adhesive tape, a filling framework or other modes are adopted for enhancing the connection strength of the ceramic block or the ceramic wafer and the adhesive tape to change the internal structure of the adhesive tape, and most of the adhesive tape has a large number of layers, so that the problems of complex structure, complex process, low flexibility, difficult coating on the roller, even breakage of a wear-resistant layer and the like are caused; therefore, the invention provides a production process of the ceramic bead wear-resistant conveying belt, which has the advantages of simple process, high flexibility, uniform wear resistance and long service life.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a production process of a ceramic bead wear-resistant conveying belt, which has the advantages of simple process, high flexibility, uniform wear resistance and long service life.
The technical scheme of the invention is as follows: a production process of a ceramic bead wear-resistant conveying belt comprises the following steps:
step 1): preparing, cleaning, drying and dip-coating the ceramic beads with the same ball diameter with an adhesive, wherein continuous stirring and heating are alternately carried out until the adhesive is completely dried when the adhesive is dip-coated, and the heating temperature is 70-80 ℃; preparing a polyurethane prepolymer and baking the polyurethane prepolymer in an oven; roughening and cleaning the surface of the adhesive tape;
step 2): heating the cleaned adhesive tape in an oven at 70-80 deg.C for 15-25 min;
step 3): pouring ceramic beads coated with the adhesive, and drying at 75-85 ℃ for standby, wherein the drying time is 0.5-1.5 h; taking a polyurethane prepolymer, simultaneously adding a moka and the heated ceramic beads, and uniformly stirring to obtain a pre-injection body;
step 4): vacuumizing the pre-injection body obtained in the step, pouring the pre-injection body on the surface of the adhesive tape through a mold, uniformly scraping ceramic beads by using a flattening device, forming a polyurethane wear-resistant layer of the ceramic beads on the surface of the adhesive tape, and ensuring the flatness of the whole conveying belt by using a flatness tester in the scraping process;
step 5): carrying out primary vulcanization on the conveyor belt obtained in the step, wherein the vulcanization time is 50-70min, the vulcanization temperature is 100-;
step 6): carrying out secondary vulcanization on the conveyer belt obtained in the step, wherein the vulcanization temperature is 100 ℃, and the vulcanization time is 10-16 h;
step 7): and (3) polishing the surface of the ceramic bead polyurethane abrasion-resistant layer vulcanized in the step, and ensuring the flatness of the conveying belt by using a flatness tester in the polishing process to finish the manufacturing.
The ceramic beads are alumina ceramic beads, and the sphere diameter of the ceramic beads is phi 1-phi 3 mm.
In the step 1), the stirring and heating time is 30-40 min.
In the step 3), the weight ratio of the polyurethane prepolymer to the ceramic beads is 1: 2.5.
In the step 4), the flattening device is a lime scraping knife, and when the lime scraping knife is used for scraping the ceramic beads, the thickness of the ceramic beads is ensured to be 5-7 mm.
In the step 5), a tool used for beveling is a wallpaper cutter.
The vulcanization in step 5) or step 6) is carried out in an oven.
The invention has the following advantages: according to the invention, the ceramic beads with the same ball diameter are adopted, and when the ceramic bead polyurethane wear-resistant layer is formed by pouring, the ceramic beads are scraped by using a flattening device, and the flatness of the surface of the conveying belt is ensured by using a flatness tester, so that the wear-resistant uniformity of the ceramic bead wear-resistant conveying belt can be greatly improved; the ceramic bead polyurethane wear-resistant layer obtained by uniformly mixing and stirring the ceramic beads and the polyurethane prepolymer is only coated on the surface of the ceramic bead wear-resistant conveyer belt, the structure and the process are simple, the weight ratio of the polyurethane prepolymer to the ceramic beads is 1:2.5, the ball diameter of the ceramic beads is controlled to be phi 1-phi 3mm, the wear resistance of the conveyer belt is improved, and compared with the prior art, the ceramic bead wear-resistant conveyer belt produced by the invention has better flexibility; the invention has the advantages of simple process, high flexibility, uniform wear resistance and long service life.
Detailed Description
The present invention will be further described with reference to the following examples.
Example 1
A production process of a ceramic bead wear-resistant conveying belt comprises the following steps:
step 1): preparing, namely cleaning, drying and dip-coating adhesive on ceramic beads with the ball diameters of phi 2mm, wherein continuous stirring and heating are alternately carried out until the adhesive is completely dried when the adhesive is dip-coated, and the heating temperature is 75 ℃; preparing a polyurethane prepolymer and baking the polyurethane prepolymer in an oven; roughening and cleaning the surface of the adhesive tape;
step 2): heating the cleaned adhesive tape in an oven at 75 deg.C for 20 min;
step 3): pouring ceramic beads coated with the adhesive into the ceramic beads, and drying the ceramic beads at the temperature of 80 ℃ for standby, wherein the drying time is 1 h; adding a moka and the heated ceramic beads into a polyurethane prepolymer and uniformly stirring to obtain a pre-injected body, wherein the weight ratio of the polyurethane prepolymer to the ceramic beads is 1: 2.5;
step 4): vacuumizing the pre-injection body obtained in the step, pouring the pre-injection body on the surface of the adhesive tape through a mold, uniformly scraping the ceramic beads by using an ash scraping cutter, ensuring that the laying thickness of the ceramic beads is 6mm, forming a polyurethane wear-resistant layer of the ceramic beads on the surface of the adhesive tape, and ensuring the flatness of the whole conveying belt by using a flatness tester in the scraping process;
step 5): carrying out primary vulcanization on the conveyor belt obtained in the step, wherein the vulcanization time is 60min, the vulcanization temperature is 110 ℃, beveling is carried out on the joint of the ceramic bead polyurethane wear-resistant layer by using a wallpaper cutter, and the surface of the poured conveyor belt is cleaned by using trichloroethylene;
step 6): carrying out secondary vulcanization on the conveyer belt obtained in the step, wherein the vulcanization temperature is 100 ℃, and the vulcanization time is 13 h;
step 7): and (3) polishing the surface of the ceramic bead polyurethane abrasion-resistant layer vulcanized in the step, and ensuring the flatness of the conveying belt by using a flatness tester in the polishing process to finish the manufacturing.
Specifically, the ceramic beads are alumina ceramic beads.
Specifically, the vulcanization in step 5) or step 6) is carried out in an oven.
Example 2
A production process of a ceramic bead wear-resistant conveying belt comprises the following steps:
step 1): preparing, namely cleaning, drying and dip-coating adhesive on ceramic beads with the ball diameters of phi 3mm, wherein continuous stirring and heating are alternately carried out until the adhesive is dried completely when the adhesive is dip-coated, and the heating temperature is 80 ℃; preparing a polyurethane prepolymer and baking the polyurethane prepolymer in an oven; roughening and cleaning the surface of the adhesive tape;
step 2): heating the cleaned adhesive tape in an oven at 80 deg.C for 15 min;
step 3): pouring ceramic beads coated with the adhesive into the ceramic beads, and drying the ceramic beads at 85 ℃ for standby, wherein the drying time is 0.5 h; adding a moka and the heated ceramic beads into a polyurethane prepolymer and uniformly stirring to obtain a pre-injected body, wherein the weight ratio of the polyurethane prepolymer to the ceramic beads is 1: 2.5;
step 4): vacuumizing the pre-injection body obtained in the step, pouring the pre-injection body on the surface of the adhesive tape through a mold, uniformly scraping the ceramic beads by using an ash scraping cutter, ensuring that the laying thickness of the ceramic beads is 6mm, forming a polyurethane wear-resistant layer of the ceramic beads on the surface of the adhesive tape, and ensuring the flatness of the whole conveying belt by using a flatness tester in the scraping process;
step 5): carrying out primary vulcanization on the conveyor belt obtained in the step, wherein the vulcanization time is 50min, the vulcanization temperature is 120 ℃, beveling is carried out on the joint of the ceramic bead polyurethane wear-resistant layer by using a wallpaper cutter, and the surface of the poured conveyor belt is cleaned by using trichloroethylene;
step 6): carrying out secondary vulcanization on the conveyer belt obtained in the step, wherein the vulcanization temperature is 100 ℃, and the vulcanization time is 10 hours;
step 7): and (3) polishing the surface of the ceramic bead polyurethane abrasion-resistant layer vulcanized in the step, and ensuring the flatness of the conveying belt by using a flatness tester in the polishing process to finish the manufacturing.
Specifically, the ceramic beads are alumina ceramic beads.
Specifically, the vulcanization in step 5) or step 6) is carried out in an oven.
Example 3
A production process of a ceramic bead wear-resistant conveying belt comprises the following steps:
step 1): preparing, namely cleaning, drying and dip-coating adhesive on ceramic beads with the ball diameters of phi 1mm, wherein continuous stirring and heating are alternately carried out until the adhesive is dried completely when the adhesive is dip-coated, and the heating temperature is 70 ℃; preparing a polyurethane prepolymer and baking the polyurethane prepolymer in an oven; roughening and cleaning the surface of the adhesive tape;
step 2): heating the cleaned adhesive tape in an oven at 70 deg.C for 25 min;
step 3): pouring ceramic beads coated with the adhesive into the ceramic beads, and drying the ceramic beads at the temperature of 75 ℃ for standby, wherein the drying time is 1.5 h; adding a moka and the heated ceramic beads into a polyurethane prepolymer and uniformly stirring to obtain a pre-injected body, wherein the weight ratio of the polyurethane prepolymer to the ceramic beads is 1: 2.5;
step 4): vacuumizing the pre-injection body obtained in the step, pouring the pre-injection body on the surface of the adhesive tape through a mold, uniformly scraping the ceramic beads by using an ash scraping cutter, ensuring that the laying thickness of the ceramic beads is 6mm, forming a polyurethane wear-resistant layer of the ceramic beads on the surface of the adhesive tape, and ensuring the flatness of the whole conveying belt by using a flatness tester in the scraping process;
step 5): carrying out primary vulcanization on the conveyor belt obtained in the step, wherein the vulcanization time is 70min, the vulcanization temperature is 100 ℃, beveling is carried out on the joint of the ceramic bead polyurethane wear-resistant layer by using a wallpaper cutter, and the surface of the poured conveyor belt is cleaned by using trichloroethylene;
step 6): carrying out secondary vulcanization on the conveyer belt obtained in the step, wherein the vulcanization temperature is 100 ℃, and the vulcanization time is 16 h;
step 7): and (3) polishing the surface of the ceramic bead polyurethane abrasion-resistant layer vulcanized in the step, and ensuring the flatness of the conveying belt by using a flatness tester in the polishing process to finish the manufacturing.
Specifically, the ceramic beads are alumina ceramic beads.
Specifically, the vulcanization in step 5) or step 6) is carried out in an oven.
Comparative example 1
Unlike example 1, the ceramic beads having a diameter of 2mm were replaced with ceramic blocks having a length, width and thickness of 2 mm.
Comparative example 2
The conveyor belt is simply a tape.
The conveying belt samples with the same size in the above examples and comparative examples are tested by one of the following national standards GB/T7986-:
each sample is passed around the roller at a wrap angle of 180 degrees, the surface to be tested is contacted with the roller, one end of the sample is firmly fixed on a drawing device of the roller friction tester, and a 343N tensile force is applied to the sample.
The tester was started and the drum started to rotate at (200 + -5) r/min and a rotational direction (i.e. the same direction as the conveyor drive) that caused the specimen to move away from its fixed end, maintaining a tensile force of 343N for 1h or until the specimen broke.
The maximum temperature of the surface of the cylinder during the test was recorded.
During and after the test, the specimens were observed for evidence of flame or glowing.
If the test specimen is not broken in the test 1h, the test specimen is removed from the drum, and the contact portion of the test specimen with the drum is examined for incandescence under a weak light.
The following test results are obtained by the above method:
according to the test results, the highest temperature of the production process of the ceramic bead wear-resistant conveyor belt in the embodiment 1, the embodiment 2 and the embodiment 3 is not much different from the highest temperature of the ceramic block in the comparative example 1, and no fracture occurs, so that the wear resistance and the flame retardant effect of the conveyor belt are improved compared with the conveyor belt in the comparative example 2, the problem of separation of the ceramic block and the rubber can be seen in the column of the fracture condition of the comparative example 1, and the separation of the ceramic block and the rubber can seriously reduce the wear resistance and the flame retardant property of the conveyor belt in the actual long-term use process.
Therefore, the ceramic beads with the same ball diameter are adopted, the ceramic beads are strickled off by using a flattening appliance when the ceramic bead polyurethane wear-resistant layer is formed by pouring, the flatness of the surface of the conveying belt is ensured by using a flatness tester, and the wear-resistant uniformity of the ceramic bead wear-resistant conveying belt can be greatly improved; the ceramic bead polyurethane wear-resistant layer obtained by uniformly mixing and stirring the ceramic beads and the polyurethane prepolymer is only coated on the surface of the ceramic bead wear-resistant conveyer belt, the structure and the process are simple, the weight ratio of the polyurethane prepolymer to the ceramic beads is 1:2.5, the ball diameter of the ceramic beads is controlled to be phi 1-phi 3mm, the wear resistance of the conveyer belt is improved, and compared with the prior art, the ceramic bead wear-resistant conveyer belt produced by the invention has better flexibility; the invention has the advantages of simple process, high flexibility, uniform wear resistance and long service life.
Claims (7)
1. A production process of a ceramic bead wear-resistant conveying belt is characterized by comprising the following steps: it comprises the following steps:
step 1): preparing, cleaning, drying and dip-coating the ceramic beads with the same ball diameter with an adhesive, wherein continuous stirring and heating are alternately carried out until the adhesive is completely dried when the adhesive is dip-coated, and the heating temperature is 70-80 ℃; preparing a polyurethane prepolymer and baking the polyurethane prepolymer in an oven; roughening and cleaning the surface of the adhesive tape;
step 2): heating the cleaned adhesive tape in an oven at 70-80 deg.C for 15-25 min;
step 3): pouring ceramic beads coated with the adhesive, and drying at 75-85 ℃ for standby, wherein the drying time is 0.5-1.5 h; taking a polyurethane prepolymer, simultaneously adding a moka and the heated ceramic beads, and uniformly stirring to obtain a pre-injection body;
step 4): vacuumizing the pre-injection body obtained in the step, pouring the pre-injection body on the surface of the adhesive tape through a mold, uniformly scraping ceramic beads by using a flattening device, forming a polyurethane wear-resistant layer of the ceramic beads on the surface of the adhesive tape, and ensuring the flatness of the whole conveying belt by using a flatness tester in the scraping process;
step 5): carrying out primary vulcanization on the conveyor belt obtained in the step, wherein the vulcanization time is 50-70min, the vulcanization temperature is 100-;
step 6): carrying out secondary vulcanization on the conveyer belt obtained in the step, wherein the vulcanization temperature is 100 ℃, and the vulcanization time is 10-16 h;
step 7): and (3) polishing the surface of the ceramic bead polyurethane abrasion-resistant layer vulcanized in the step, and ensuring the flatness of the conveying belt by using a flatness tester in the polishing process to finish the manufacturing.
2. The production process of the ceramic bead wear-resistant conveyor belt according to claim 1, wherein: the ceramic beads are alumina ceramic beads, and the sphere diameter of the ceramic beads is phi 1-phi 3 mm.
3. The production process of the ceramic bead wear-resistant conveyor belt according to claim 1, wherein: in the step 1), the stirring and heating time is 30-40 min.
4. The production process of the ceramic bead wear-resistant conveyor belt according to claim 1, wherein: in the step 3), the weight ratio of the polyurethane prepolymer to the ceramic beads is 1: 2.5.
5. The production process of the ceramic bead wear-resistant conveyor belt according to claim 1, wherein: in the step 4), the flattening device is a lime scraping knife, and when the lime scraping knife is used for scraping the ceramic beads, the thickness of the ceramic beads is ensured to be 5-7 mm.
6. The production process of the ceramic bead wear-resistant conveyor belt according to claim 1, wherein: in the step 5), a tool used for beveling is a wallpaper cutter.
7. The production process of the ceramic bead wear-resistant conveyor belt according to claim 1, wherein: the vulcanization in step 5) or step 6) is carried out in an oven.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114854295A (en) * | 2022-04-14 | 2022-08-05 | 山西维力固科技股份有限公司 | Polyurethane-based wear-resistant composite material and construction process |
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