CN115583037A - Repairing method of PVC flame-retardant conveying belt - Google Patents

Repairing method of PVC flame-retardant conveying belt Download PDF

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Publication number
CN115583037A
CN115583037A CN202211094229.7A CN202211094229A CN115583037A CN 115583037 A CN115583037 A CN 115583037A CN 202211094229 A CN202211094229 A CN 202211094229A CN 115583037 A CN115583037 A CN 115583037A
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CN
China
Prior art keywords
belt
joint
finger
pvc flame
retardant
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Pending
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CN202211094229.7A
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Chinese (zh)
Inventor
孔令康
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Xingtai Sente Rubber Technology Co ltd
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Xingtai Sente Rubber Technology Co ltd
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Application filed by Xingtai Sente Rubber Technology Co ltd filed Critical Xingtai Sente Rubber Technology Co ltd
Priority to CN202211094229.7A priority Critical patent/CN115583037A/en
Publication of CN115583037A publication Critical patent/CN115583037A/en
Pending legal-status Critical Current

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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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
    • B29C66/022—Mechanical pre-treatments, e.g. reshaping
    • B29C66/0222—Mechanical pre-treatments, e.g. reshaping without removal of material, e.g. cleaning by air blowing or using brushes
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
    • B29C66/022—Mechanical pre-treatments, e.g. reshaping
    • B29C66/0224—Mechanical pre-treatments, e.g. reshaping with removal of material
    • B29C66/02241—Cutting, e.g. by using waterjets, or sawing
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
    • B29C66/022—Mechanical pre-treatments, e.g. reshaping
    • B29C66/0224—Mechanical pre-treatments, e.g. reshaping with removal of material
    • B29C66/02245—Abrading, e.g. grinding, sanding, sandblasting or scraping
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/03—After-treatments in the joint area
    • B29C66/032—Mechanical after-treatments
    • B29C66/0322—Post-pressing without reshaping, i.e. keeping the joint under pressure after joining
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/03—After-treatments in the joint area
    • B29C66/034—Thermal after-treatments
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
    • B29C66/4324—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms for making closed loops, e.g. belts
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J167/00—Adhesives based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Adhesives based on derivatives of such polymers
    • 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
    • B29L2029/00—Belts or bands
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Belt Conveyors (AREA)

Abstract

The invention discloses a method for repairing a PVC flame-retardant conveyor belt, which comprises the following steps: step one, preparing a joint strip; step two, polishing the finger strips; step three, cleaning the finger strips; step four, gluing and butting; step five, pressurizing, heating and curing; step six, polishing the belt surface of the belt; step seven, cleaning the belt surface of the belt; step eight, coating the surface of the belt with a covering adhesive; according to the invention, the finger strips of the joints are manufactured by a specially-made finger strip manufacturing machine, so that the finger seams of the finger strips are uniform, the joint fitting degree is good, and the inclination is consistent, the joints are respectively polished by 120-mesh and 400-mesh grinding wheels and are simultaneously matched with the cleaning of butanone, foreign matters such as dust, coal slag and the like at the joints are effectively removed, the local stress at the joints is reduced, the nylon seal cloth is bonded at the joints, the surface of the nylon seal cloth is coated with the covering glue, the structural strength of the joints is improved, and the surface of the conveying belt is coated with the covering glue, so that the repairing quality of the PVC flame-retardant conveying belt is improved.

Description

Repairing method of PVC flame-retardant conveyor belt
Technical Field
The invention relates to the technical field of conveyor belt repair, in particular to a repair method of a PVC flame-retardant conveyor belt.
Background
At present, mining fields in mining industry are often required to be renewed due to the fact that conveying belts are worn and scrapped, the used PVC flame-retardant conveying belts are generally directly scrapped to greatly waste resources, the performance of the conveying belts is improved, the conveying belts with restoration value are renewed to obtain obvious saving effects, and therefore a method for restoring the PVC flame-retardant conveying belts is needed.
The joint strip of conveyer belt on the market now is the cutting of artifical marking off mostly, fashioned precision is not high after the cutting, it is big to cause the finger joint clearance of butt joint, and the finger joint butt joint is inhomogeneous, it personally submits local bonding to cause the bonding, the outer finger slope of the other turn round is inconsistent, rectify after the butt joint, must form stress concentration, greatly reduced the structural strength who bonds, the back is restoreed to current conveyer belt simultaneously, the wearability of joint position, antistatic nature and fire resistance all can have certain reduction, whole quality after the restoration has been reduced, and at the sticky in-process of concatenation, the very big influence of dust impurity on conveyer belt surface concatenation quality, the stretch-proofing intensity of product after the concatenation has been reduced.
Disclosure of Invention
The invention aims to provide a repairing method of a PVC flame-retardant conveying belt, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a repairing method of a PVC flame-retardant conveying belt comprises the following steps: step one, preparing a joint strip; step two, polishing the finger strips; step three, cleaning the finger strips; step four, gluing and butting; step five, pressurizing, heating and curing; step six, polishing the belt surface of the belt; step seven, cleaning the belt surface of the belt; step eight, coating the surface of the belt with a covering adhesive;
firstly, using conveyor belts to be spliced, blowing off dust and impurities on the surfaces by using an air gun, and then cutting finger strips by using a special finger strip making machine to make the finger strips with uniform size, same gaps and consistent inclination directions;
in the second step, after the finger strips in the first step are manufactured, the surfaces of the two joints are firstly polished by a 120-mesh grinding wheel until dust and coal ash are completely removed, and then polished by a 400-mesh grinding machine, so that the surface roughness of the joints of the conveying belt is qualified, and the finished finger strips are reserved;
in the third step, after the joint of the conveying belt in the second step is polished, cleaning the polished part by using butanone as a cleaning agent, and airing for later use after cleaning;
in the fourth step, after the cleaning of the joint in the third step is finished, uniformly coating joint glue on two surfaces of the joint to be spliced, uniformly splicing the finger strips of the joint, waiting for the joint glue to solidify, coating the joint glue once again, and then adhering nylon sealing cloth to two sides of the joint for later use;
in the fifth step, after the nylon sealing cloth in the fourth step is bonded, the joint of the conveying belt is placed in a press for pressurization, heating and curing, and the conveying belt is reserved after the pressure and heating curing;
in the sixth step, after the pressurization, heating and curing in the fifth step are completed, the surface of the PVC flame-retardant conveyor belt to be repaired is polished by using a grinding wheel, the surface is polished by using a 120-mesh grinding wheel in the polishing process, and then the surface is polished by using a 400-mesh grinding wheel for later use;
in the seventh step, after polishing the surface of the PVC flame-retardant conveyor belt in the sixth step, using acetone as a cleaning agent to clean the surface of the PVC flame-retardant conveyor belt, and drying the PVC flame-retardant conveyor belt for later use after cleaning;
and step eight, after the belt surface of the PVC flame-retardant conveyor belt in the step seven is cleaned, uniformly coating the joint and the belt surface of the PVC flame-retardant belt by using a covering glue brush until the PVC flame-retardant belt is permeated and dried, then performing secondary brush coating by using the covering glue, and performing secondary brush coating on both sides of the PVC flame-retardant conveyor belt until the covering glue is solidified and dried to finish the repair of the PVC flame-retardant conveyor belt.
Preferably, in the first step, the use method of the special finger strip making machine comprises the following steps: firstly, fixing the paired conveying belt joints by using a joint positioning frame to ensure the consistency of the positions of the two joints; secondly, placing a backup plate on the joint, and determining the position and the direction of the finger strip notch by using the backup plate; thirdly, positioning the cutter by utilizing a cutter inclined positioner to ensure the shape of the side surface of the finger strip and accurately match the side surfaces of the male finger and the female finger; and fourthly, cutting along the backup plate and the cutter inclined positioner by using a cutter to form the finger joint.
Preferably, in the third step, the cleaning time of the butanone is 1-2min, and the airing time is 20-30min.
Preferably, in the fourth step, the joint compound is formed by mixing resin particles and methyl ethyl ketone.
Preferably, in the fifth step, the time of pressurizing and heating is 60-120min.
Preferably, in the sixth step, the cover rubber is prepared by mixing a mixture (34.4 parts of sebacic polyester, 13.5 parts of adipic polyester, 4.8 parts of titanium dioxide, 1 part of fumed silica, 0.3 part of hard carbon black, 11.3 parts of toluene diisocyanate, 35 parts of xylene and 0.06 part of benzoyl chloride) with a filler (3 parts of carbon black, 7 parts of ethyl ester, 15 parts of flame retardant, 47 parts of quartz powder, 28 parts of ammonium polyphosphate) and a curing agent (80 parts of ethyl ester and 20 parts of rubber vulcanizing agent).
Compared with the prior art, the invention has the beneficial effects that:
1. the invention manufactures the finger strips of the joints through a specially-made finger strip manufacturing machine tool and a cutter, ensures uniform finger seams of the finger strips, good joint fitting degree and consistent inclination, does not need to be corrected after butt joint, reduces local stress at the joints, is beneficial to improving the bonding firmness of the joints and improves the repair quality;
2. according to the invention, the nylon sealing cloth is bonded at the joint, and the covering glue is coated on the surface of the nylon sealing cloth, so that the structural strength of the joint is greatly improved, the tensile resistance is improved, and the tensile force, wear resistance and antistatic capability of the joint are increased;
3. according to the invention, the joints are respectively polished by using the 120-mesh and 400-mesh grinding wheels and are matched with the cleaning of butanone, so that foreign matters such as dust, coal slag and the like at the joints are effectively removed, the roughness of the joints is qualified, and the adhesive capacity of glue is favorably improved.
4. The surface of the PVC flame-retardant conveyor belt is polished, cleaned and paved with glue for repair, and compared with a new conveyor belt of the same grade, the PVC flame-retardant conveyor belt is more wear-resistant, flame-retardant and antistatic in renovation, and meanwhile, the tensile resistance of the PVC flame-retardant conveyor belt is greatly improved;
drawings
FIG. 1 is a flow chart of the method of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an embodiment of the present invention: a repairing method of a PVC flame-retardant conveying belt comprises the following steps: step one, preparing a joint strip; step two, polishing the finger strips; step three, cleaning the finger strips; step four, gluing and butting; step five, pressurizing, heating and curing; step six, polishing the belt surface of the belt; step seven, cleaning the belt surface of the belt; step eight, coating the surface of the belt with a covering adhesive;
in the first step, firstly, the conveyer belts to be spliced are taken, dust and impurities on the surfaces of the conveyer belts are blown off by an air gun, then, the finger strips are cut by a special finger strip making machine to make the finger strips with uniform size, same gaps and consistent inclination directions, and the using method of the special finger strip making machine comprises the following steps: firstly, fixing the paired conveying belt joints by using a joint positioning frame to ensure the consistency of the positions of the two joints; secondly, placing a backup plate on the joint, and determining the position and the direction of the finger strip notch by using the backup plate; thirdly, positioning the cutter by using a cutter inclination positioner to ensure the shape of the side surface of the finger strip and accurately match the side surfaces of the male finger and the female finger; fourthly, cutting along the backup plate and the cutter inclined positioner by using a cutter to form finger joints;
in the second step, after the finger strips in the first step are manufactured, the surfaces of the two joints are firstly polished by a 120-mesh grinding wheel until dust and coal ash are completely removed, and then polished by a 400-mesh grinding machine, so that the surface roughness of the joints of the conveying belt is qualified, and the finished finger strips are reserved;
in the third step, after the joint of the conveying belt in the second step is polished, cleaning the polished joint by using butanone as a cleaning agent, wherein the cleaning time of the butanone is 1-2min, the airing time is 20-30min, and the polished joint is aired for later use after cleaning;
in the fourth step, after the cleaning of the joint in the third step is finished, uniformly coating joint glue on two surfaces of the joint to be spliced, wherein the joint glue is formed by mixing resin particles and methyl ethyl ketone;
in the fifth step, after the nylon sealing cloth in the fourth step is bonded, the joint of the conveyer belt is placed in a press for pressurization, heating and curing, and the pressurization and heating time is 60-120min, and the nylon sealing cloth is reserved after the pressurization and heating;
in the sixth step, after the pressurization, heating and curing in the fifth step are completed, the surface of the PVC flame-retardant conveyor belt to be repaired is polished by using a grinding wheel, the surface is polished by using a 120-mesh grinding wheel in the polishing process, and then the surface is polished by using a 400-mesh grinding wheel for later use;
in the seventh step, after polishing the surface of the PVC flame-retardant conveyor belt in the sixth step, using acetone as a cleaning agent to clean the surface of the PVC flame-retardant conveyor belt, and drying the PVC flame-retardant conveyor belt for later use after cleaning;
in the eighth step, after the belt surface of the PVC flame-retardant conveyor belt in the seventh step is cleaned, the joint and the belt surface of the PVC flame-retardant belt are uniformly coated by using a covering adhesive brush until the PVC flame-retardant conveyor belt is permeated and dried, then the covering adhesive brush is used for the second time, both sides of the PVC flame-retardant conveyor belt are coated until the covering adhesive is covered, gelled and dried, and the PVC flame-retardant conveyor belt is repaired, wherein the covering adhesive is formed by mixing a mixture (34.4 parts of sebacic polyester, 13.5 parts of adipic polyester, 4.8 parts of titanium dioxide, 1 part of gas-phase white carbon black, 0.3 part of hard carbon black, 11.3 parts of toluene diisocyanate, 35 parts of xylene and 0.06 part of benzoyl chloride), fillers (3 parts of carbon black, 7 parts of ethyl ester, 15 parts of flame retardant, 47 parts of quartz powder, 28 parts of ammonium polyphosphate) and curing agents (80 parts of ethyl ester and 20 parts of rubber vulcanizing agent).
Based on the above, the invention has the advantages that before splicing, the invention utilizes a specially-made finger strip manufacturing machine or manual work to cut the finger strips, the working efficiency is high, the gaps of the cut finger strips are uniform, the inclination is consistent, the laminating degree between the two joints is good, the local stress at the joints is reduced, the bonding firmness of the joints is favorably improved, the repair quality is improved, meanwhile, the joints are respectively polished by 120-mesh and 400-mesh grinding wheels, and simultaneously, the cleaning of butanone is matched, foreign matters such as dust, coal slag and the like at the joints are effectively removed, the roughness of the joints is ensured to be qualified, the adhesive capacity of glue is favorably improved, simultaneously, after the joints are bonded by the joint glue, nylon seal cloth is bonded on the two sides of the joints, the structural strength of the joints is improved, meanwhile, two layers of covering glue are coated on the surfaces of the nylon cloth, the repairing of the PVC flame-retardant conveyor belt is completed by the covering glue, the structural strength of the joints is greatly improved, the stretching resistance is improved, and the tensile resistance, the tension, the static resistance and wear resistance of the PVC conveyor belt are improved.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (6)

1. The repairing method of the PVC flame-retardant conveying belt comprises the following steps: step one, preparing a joint strip; step two, polishing the finger strips; step three, cleaning the finger strips; step four, gluing and butting; step five, pressurizing, heating and curing; step six, polishing the belt surface of the belt; step seven, cleaning the belt surface of the belt; step eight, coating glue on the surface of the belt; the method is characterized in that:
in the first step, firstly, the conveying belts to be spliced are taken, an air gun is used for blowing off dust and impurities on the surfaces, and then a special finger strip manufacturing machine is used for cutting finger strips to manufacture the finger strips with uniform size, same gaps and consistent inclination directions;
in the second step, after the finger strips in the first step are manufactured, the surfaces of the two joints are firstly polished by a 120-mesh grinding wheel until dust and coal ash are completely removed, and then polished by a 400-mesh grinding machine, so that the surface roughness of the joints of the conveying belt is qualified, and the finished finger strips are reserved;
in the third step, after the joint of the conveying belt in the second step is polished, cleaning the polished joint by using butanone as a cleaning agent, and airing for later use after cleaning;
in the fourth step, after the cleaning of the joint in the third step is finished, uniformly coating joint glue on two surfaces of the joint to be spliced, uniformly splicing the finger strips of the joint, waiting for the joint glue to solidify, coating the joint glue once again, and then adhering nylon sealing cloth to two sides of the joint for later use;
in the fifth step, after the nylon sealing cloth in the fourth step is bonded, the joint of the conveying belt is placed in a press for pressurization, heating and curing, and the conveying belt is reserved after the pressure and heating curing;
in the sixth step, after the pressurization, heating and curing in the fifth step are finished, polishing the surface of the PVC flame-retardant conveyor belt to be repaired by using a grinding wheel, wherein in the polishing process, the surface is firstly polished by using a 120-mesh grinding wheel, and then the surface is polished by using a 400-mesh grinding wheel for later use;
in the seventh step, after polishing the surface of the PVC flame-retardant conveyor belt in the sixth step, using acetone as a cleaning agent to clean the surface of the PVC flame-retardant conveyor belt, and drying the PVC flame-retardant conveyor belt for later use after cleaning;
in the eighth step, after the belt surface of the PVC flame-retardant conveyor belt in the seventh step is cleaned, the joint and the belt surface of the PVC flame-retardant belt are uniformly coated by using a covering adhesive brush until the PVC flame-retardant belt is permeated and dried, then the covering adhesive brush is used for the second time, and both sides of the PVC flame-retardant conveyor belt are coated until the covering adhesive is gelled and dried, so that the repair of the PVC flame-retardant conveyor belt is completed.
2. The repairing method of the PVC flame-retardant conveyor belt according to claim 1, characterized in that: in the first step, the using method of the special finger strip manufacturing machine tool comprises the following steps: firstly, fixing the paired conveying belt joints by using a joint positioning frame to ensure the consistency of the positions of the two joints; secondly, placing a backup plate on the joint, and determining the position and the direction of the finger strip notch by using the backup plate; thirdly, positioning the cutter by utilizing a cutter inclined positioner to ensure the shape of the side surface of the finger strip and accurately match the side surfaces of the male finger and the female finger; and fourthly, cutting along the backup plate and the cutter inclined positioner by using a cutter to form the finger joint.
3. The method for repairing the PVC flame-retardant conveyor belt according to claim 1, wherein the method comprises the following steps: in the third step, the cleaning time of the butanone is 1-2min, and the airing time is 20-30min.
4. The method for repairing the PVC flame-retardant conveyor belt according to claim 1, wherein the method comprises the following steps: in the fourth step, the joint adhesive is formed by mixing resin particles and methyl ethyl ketone.
5. The method for repairing the PVC flame-retardant conveyor belt according to claim 1, wherein the method comprises the following steps: in the fifth step, the time of pressurizing and heating is 60-120min.
6. The method for repairing the PVC flame-retardant conveyor belt according to claim 1, wherein the method comprises the following steps: in the sixth step, the cover rubber is formed by mixing a mixture (34.4 parts of sebacic polyester, 13.5 parts of adipic polyester, 4.8 parts of titanium dioxide, 1 part of vapor phase process white carbon black, 0.3 part of hard carbon black, 11.3 parts of toluene diisocyanate, 35 parts of xylene and 0.06 part of benzoyl chloride) with a filler (3 parts of carbon black, 7 parts of ethyl ester, 15 parts of flame retardant, 47 parts of quartz powder, 28 parts of ammonium polyphosphate) and a curing agent (80 parts of ethyl ester and 20 parts of rubber vulcanizing agent).
CN202211094229.7A 2022-09-08 2022-09-08 Repairing method of PVC flame-retardant conveying belt Pending CN115583037A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211094229.7A CN115583037A (en) 2022-09-08 2022-09-08 Repairing method of PVC flame-retardant conveying belt

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211094229.7A CN115583037A (en) 2022-09-08 2022-09-08 Repairing method of PVC flame-retardant conveying belt

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Publication Number Publication Date
CN115583037A true CN115583037A (en) 2023-01-10

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Application Number Title Priority Date Filing Date
CN202211094229.7A Pending CN115583037A (en) 2022-09-08 2022-09-08 Repairing method of PVC flame-retardant conveying belt

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