CN113199724A - Method for manufacturing polyester hard thread and method for manufacturing anti-tearing conveying belt by using polyester hard thread - Google Patents
Method for manufacturing polyester hard thread and method for manufacturing anti-tearing conveying belt by using polyester hard thread Download PDFInfo
- Publication number
- CN113199724A CN113199724A CN202110465287.5A CN202110465287A CN113199724A CN 113199724 A CN113199724 A CN 113199724A CN 202110465287 A CN202110465287 A CN 202110465287A CN 113199724 A CN113199724 A CN 113199724A
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- Prior art keywords
- polyester
- hard
- polyester hard
- manufacturing
- conveying belt
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Classifications
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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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/06—Rod-shaped
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D29/00—Producing belts or bands
- B29D29/06—Conveyor belts
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Woven Fabrics (AREA)
Abstract
The invention discloses a method for manufacturing polyester hard threads and a method for manufacturing a tear-proof conveyer belt by using the polyester hard threads, which comprises the following steps: a. preparing polyester hard yarns; b. weaving the prepared polyester hard threads into polyester hard canvas; c. combining the knitted polyester hard canvas with a covering rubber sizing material, and performing one-time calendering to form a semi-finished product of the polyester hard net conveying belt; d. and (3) vulcanizing the semi-finished product of the terylene hard net conveying belt at high temperature by a conveying belt vulcanizing machine, and then performing cold forming to obtain the finished product conveying belt. The problem of current dacron conveyer belt production process generally comparatively complicated, it is lower to produce back rubber adhesion, moreover because the weft brute force of preparation dacron conveyer belt canvas is lower, the condition of tearing appears easily, life is generally shorter.
Description
Technical Field
The invention relates to the field of production and processing of polyester products, in particular to a method for manufacturing polyester hard threads and a method for manufacturing a tear-proof conveying belt by using the polyester hard threads.
Background
The terylene product is a common material, and the terylene thread is also a basic wire material which can be suitable for multiple purposes, is often used for manufacturing a conveyer belt, has good conveying capacity when used as the manufactured conveyer belt, but the rubber adhesive force of the existing terylene thread is generally low after being produced, and the produced terylene thread is easy to be elongated due to overlarge tension force in the use process due to the stretching process.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a method for manufacturing a terylene hard thread and a method for manufacturing a tearing-proof conveyer belt by using the terylene hard thread.
The purpose of the invention is realized by the following technical scheme:
a method for manufacturing polyester hard yarns comprises the following steps: a1, drying the prepared polyester chips, melting and extruding the polyester chips into polyester round bars; a2, stretching the extruded polyester round bar for three times; a3, after the stretching of the polyester round bar is finished, enabling the mixed liquid to be attached to the surface of the stretched polyester round bar; a4, cooling and winding the polyester round strip into the polyester hard thread after final high-temperature shaping.
After the three times of stretching, the tear resistance of the polyester hard threads can be stronger, and the mixed liquid is attached to the surface of the polyester round bar after the third time of stretching, so that the adhesive force between the manufactured polyester hard threads and the rubber material exceeds 30% of that of the similar products, the manufactured polyester hard threads can be used independently, and more than 2 polyester hard threads can be twisted into threads by a rope making machine.
As a further preferred aspect of the present invention, the temperature of the drying in step a1 is controlled at 165-170 ℃.
The moisture in the terylene chips can be dried to the maximum extent at the temperature, the purity is better, no impurities exist in the produced yarn, and the strength is uniform.
As a further preference of the present invention, the drawing in step a2 is carried out three times, namely, the first drawing is carried out in a water tank at 58-62 ℃ according to the proportion of 150-250%, the second drawing is carried out in a water tank at 90-99 ℃ according to the proportion of 200-400%, and the third drawing is carried out in a drying room at 225-250 ℃ according to the proportion of 150-300%.
As a further preferred aspect of the present invention, the mixed solution comprises the following raw materials in parts by mass: 28-32 parts of butadiene-pyridine latex, 30-35 parts of purified water and 18-25 parts of phenolic resin adhesive.
The mixed liquid can be combined with the surface of the polyester round bar to generate adhesive force at a certain temperature after fully reacting, only the polyester round bar is combined with the mixed liquid to generate adhesive force with rubber, and if no mixed liquid participates in the reaction, the adhesive force between the polyester round bar and the rubber is almost zero.
As a further preferred aspect of the present invention, the mixed solution comprises the following raw materials in parts by mass: 30 parts of butyl Pix latex, 30 parts of purified water and 20 parts of phenolic resin adhesive.
In a further preferred embodiment of the present invention, the temperature for high-temperature setting in step a4 is 240 ℃.
The temperature is slightly lower than the melting point of the terylene, so that the fiber directions in the terylene circular strips can be maintained, the terylene circular strips are suitable for shaping without breaking, and if the terylene circular strips are not shaped at the temperature, the fiber directions can be disordered, thereby reducing the strength of the yarn.
A method for manufacturing a tear-proof conveyer belt by using any one of the polyester hard yarns comprises the following steps: b. weaving the prepared polyester hard threads into polyester hard canvas; c. combining the knitted polyester hard canvas with a covering rubber sizing material, and performing one-time calendering to form a semi-finished product of the polyester hard net conveying belt; d. and (3) vulcanizing the semi-finished product of the terylene hard net conveying belt at high temperature by a conveying belt vulcanizing machine, and then performing cold forming to obtain the finished product conveying belt. Compared with the traditional process, the production method is simpler, the production efficiency is effectively improved, the production cost is saved, the energy consumption in the production process is reduced, in addition, the polyester hard threads used by the weft of the woven polyester hard canvas have higher strength than the traditional canvas weft, so the conveying belt has weft tearing resistance, secondly, the polyester hard canvas used by the conveying belt is of a net-shaped structure, the upper covering glue and the lower covering glue of the conveying belt can be penetrated into a whole, the delaminating-free performance is realized, in addition, the structure is compact, the conveying belt is light, and the energy consumption can be greatly saved for a user unit.
As a further preferable mode of the present invention, the weaving process in the step b is to weave the prepared polyester hard yarn into the polyester hard canvas with a weaving machine, wherein the polyester hard yarn has a density of 2 to 6 yarns per centimeter according to the variety in the radial direction, and the warp yarn and the weft yarn are woven together with the weaving machine to have a density of 2 to 6 yarns per centimeter.
In a further preferred embodiment of the present invention, the calendering in step c is performed by putting the knitted dacron hard canvas on a four-roller calender, and combining the covering rubber compound extruded by two rollers on the four-roller calender and the covering rubber compound extruded by two rollers at the bottom of the four-roller calender for one-time calendering.
Traditional conveyer belt semi-manufactured goods are because technology is loaded down with trivial details when the preparation, the condition of smuggleing debris and water is smugglied secretly very easily to appear between conveyer belt layer and the layer, so appear the bubble phenomenon easily when the later process vulcanizes, this dacron stereoplasm net conveyer belt semi-manufactured goods is then one shot forming, the condition of object and water secretly has not appeared in the centre, the dacron stereoplasm net conveyer belt finished product that produces after the vulcanization does not have the bubbling condition, because be network structure again, so cover rubber can be beaten completely and combine as an organic whole from top to bottom, make the dacron stereoplasm net conveyer belt that produces can not delaminating, the quality of dacron stereoplasm net conveyer belt has been promoted greatly.
As a further preference of the invention, the temperature of the high-temperature vulcanization in the step d is 130-155 ℃.
At the temperature, the rubber vulcanization system is most stable, the performance of the vulcanized rubber product is optimal, and the conditions of long vulcanization time, unstable rubber performance or under-vulcanization can occur when the rubber product is not vulcanized at the temperature.
Compared with the prior art, the invention can at least achieve one of the following beneficial effects:
1. the production process is simple and easy to control, the production cost is greatly saved, the energy consumption is reduced, and the adhesive force with rubber exceeds 30 percent of that of similar products.
2. Because the product is stretched for three times, the product is not easy to be lengthened due to overlarge tension force in the using process.
3. Traditional dacron net conveyer belt semi-manufactured goods are because the technology is loaded down with trivial details when the preparation, the condition of smuggleing debris and water secretly very easily appears between conveyer belt layer and the layer, so appear the bubble phenomenon easily when the next technology vulcanizes, this dacron stereoplasm net conveyer belt semi-manufactured goods is then one shot forming, the condition of smuggleing thing and water secretly can not appear in the centre, the dacron stereoplasm net conveyer belt finished product that produces after the vulcanization does not have the foamy condition, because again is network structure, so cover rubber can be beaten thoroughly completely from top to bottom and combine as an organic whole, make the dacron stereoplasm net conveyer belt that produces can not delaminating, the quality of dacron stereoplasm net conveyer belt has been promoted greatly.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention will be described in detail and completely with reference to the accompanying drawings.
Thus, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.
Specific example 1:
a method for manufacturing polyester hard yarns comprises the following steps: a1, drying the prepared polyester chips, melting and extruding the polyester chips into polyester round bars; a2, stretching the extruded polyester round bar for three times; a3, after the stretching of the polyester round bar is finished, enabling the mixed liquid to be attached to the surface of the stretched polyester round bar; a4, cooling and winding the polyester round strip into the polyester hard thread after final high-temperature shaping.
After the three times of stretching, the tear resistance of the polyester hard threads can be stronger, and the mixed liquid is attached to the surface of the polyester round bar after the third time of stretching, so that the adhesive force between the manufactured polyester hard threads and the rubber material exceeds 30% of that of the similar products, the manufactured polyester hard threads can be used independently, and more than 2 polyester hard threads can be twisted into threads by a rope making machine.
Specific example 2:
this example further illustrates the step a1 on the basis of the specific example 1, wherein the temperature of the drying in the step a1 is controlled to be 165-170 ℃.
The moisture in the terylene chips can be dried to the maximum extent at the temperature, the purity is better, no impurities exist in the produced yarn, and the strength is uniform.
Specific example 3:
this example further illustrates step a2 based on specific example 1, wherein the stretching in step a2 is performed three times, that is, the first time is performed in a water tank at 58-62 ℃ according to a ratio of 150-250%, the second time is performed in a water tank at 90-99 ℃ according to a ratio of 200-400%, and the third time is performed in a drying room at 225-250 ℃ according to a ratio of 150-300%.
Stretching three times is milder, and the stretched polyester round bar has stronger tearing-resistant capability and is not easy to deform through adjusting the stretching proportion and the temperature.
Specific example 4:
this example further illustrates a mixed solution obtained by the steps based on specific example 1, where the mixed solution includes the following raw materials in parts by weight: 28-32 parts of butadiene-pyridine latex, 30-35 parts of purified water and 18-25 parts of phenolic resin adhesive.
The mixed liquid can be combined with the surface of the polyester round bar to generate adhesive force at a certain temperature after fully reacting, only the polyester round bar is combined with the mixed liquid to generate adhesive force with rubber, and if no mixed liquid participates in the reaction, the adhesive force between the polyester round bar and the rubber is almost zero.
Specific example 5:
this example further illustrates a mixed solution based on specific example 4, where the mixed solution includes the following raw materials in parts by weight: 30 parts of butyl Pix latex, 30 parts of purified water and 20 parts of phenolic resin adhesive.
Specific example 6:
this example further illustrates the step a4 on the basis of the specific example 1, wherein the temperature for high-temperature setting in the step a4 is 240 ℃.
The temperature is slightly lower than the melting point of the terylene, so that the fiber directions in the terylene circular strips can be maintained, the terylene circular strips are suitable for shaping without breaking, and if the terylene circular strips are not shaped at the temperature, the fiber directions can be disordered, thereby reducing the strength of the yarn.
Specific example 7:
a method for manufacturing a tear-proof conveyer belt by using any one of the polyester hard yarns comprises the following steps: b. weaving the prepared polyester hard threads into polyester hard canvas; c. combining the knitted polyester hard canvas with a covering rubber sizing material, and performing one-time calendering to form a semi-finished product of the polyester hard net conveying belt; d. and (3) vulcanizing the semi-finished product of the terylene hard net conveying belt at high temperature by a conveying belt vulcanizing machine, and then performing cold forming to obtain the finished product conveying belt.
Compared with the traditional process, the production method is simpler, the production efficiency is effectively improved, the production cost is saved, the energy consumption in the production process is reduced, in addition, the polyester hard threads used by the weft of the woven polyester hard canvas have higher strength than the traditional canvas weft, so the conveying belt has weft tearing resistance, secondly, the polyester hard canvas used by the conveying belt is of a net-shaped structure, the upper covering glue and the lower covering glue of the conveying belt can be penetrated into a whole, the delaminating-free performance is realized, in addition, the structure is compact, the conveying belt is light, and the energy consumption can be greatly saved for a user unit.
Specific example 8:
in this embodiment, a step b is further described on the basis of specific example 7, in the weaving process in the step b, the prepared polyester hard yarn is woven into the polyester hard canvas by a weaving machine according to the density of 2 to 6 yarns per centimeter in the radial direction and the density of 2 to 6 yarns per centimeter in the weft yarn.
Specific example 9:
this example further illustrates step c based on specific example 7, in which the step c of calendering and molding is to put the knitted dacron hard canvas on a four-roller calender and combine the covering rubber compound extruded by two rollers on the four-roller calender and the covering rubber compound extruded by two rollers at the bottom to perform one-time calendering and molding.
Traditional conveyer belt semi-manufactured goods are because technology is loaded down with trivial details when the preparation, the condition of smuggleing debris and water is smugglied secretly very easily to appear between conveyer belt layer and the layer, so appear the bubble phenomenon easily when the later process vulcanizes, this dacron stereoplasm net conveyer belt semi-manufactured goods is then one shot forming, the condition of object and water secretly has not appeared in the centre, the dacron stereoplasm net conveyer belt finished product that produces after the vulcanization does not have the bubbling condition, because be network structure again, so cover rubber can be beaten completely and combine as an organic whole from top to bottom, make the dacron stereoplasm net conveyer belt that produces can not delaminating, the quality of dacron stereoplasm net conveyer belt has been promoted.
Specific example 10:
this example further illustrates step d based on the specific example 7, wherein the temperature of the high temperature vulcanization in step d is 130 ℃ to 155 ℃.
At the temperature, the rubber vulcanization system is most stable, the performance of the vulcanized rubber product is optimal, and the conditions of long vulcanization time, unstable rubber performance or under-vulcanization can occur when the rubber product is not vulcanized at the temperature.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (10)
1. The manufacturing method of the polyester hard yarn is characterized by comprising the following steps: the method comprises the following steps: a1, drying the prepared polyester chips, melting and extruding the polyester chips into polyester round bars; a2, stretching the extruded polyester round bar for three times; a3, after the stretching of the polyester round bar is finished, enabling the mixed liquid to be attached to the surface of the stretched polyester round bar; a4, cooling and winding the polyester round strip into the polyester hard thread after final high-temperature shaping.
2. The method for manufacturing the polyester hard yarn according to claim 1, characterized in that: the temperature of the drying in the step a1 is controlled to be 165-170 ℃.
3. The method for manufacturing the polyester hard yarn according to claim 1, characterized in that: the stretching in the step a2 is carried out for three times, namely, the stretching is carried out for the first time according to the proportion of 150-250% in a water tank at the temperature of 58-62 ℃, the stretching is carried out for the second time according to the proportion of 200-400% in a water tank at the temperature of 90-99 ℃, and the stretching is carried out for the third time according to the proportion of 150-300% in a drying room at the temperature of 225-250 ℃.
4. The method for manufacturing the polyester hard yarn according to claim 1, characterized in that: the mixed solution comprises the following raw materials in parts by weight: 28-32 parts of butadiene-pyridine latex, 30-35 parts of purified water and 18-25 parts of phenolic resin adhesive.
5. The method for manufacturing the polyester hard yarn according to claim 4, characterized in that: the mixed solution comprises the following raw materials in parts by weight: 30 parts of butyl Pix latex, 30 parts of purified water and 20 parts of phenolic resin adhesive.
6. The method for manufacturing the polyester hard yarn according to claim 1, characterized in that: the temperature for high-temperature setting in the step a4 is 240 ℃.
7. A method for manufacturing a tear-proof conveyer belt by using the terylene hard thread manufactured by any one of claims 1 to 6, which is characterized in that: the method comprises the following steps: b. weaving the prepared polyester hard threads into polyester hard canvas; c. combining the knitted polyester hard canvas with a covering rubber sizing material, and performing one-time calendering to form a semi-finished product of the polyester hard net conveying belt; d. and (3) vulcanizing the semi-finished product of the terylene hard net conveying belt at high temperature by a conveying belt vulcanizing machine, and then performing cold forming to obtain the finished product conveying belt.
8. The method for manufacturing the anti-tearing conveying belt by using the terylene hard thread manufactured according to any one of claims 1 to 6 according to claim 7, wherein the method comprises the following steps: and c, weaving in the step b, namely weaving the prepared polyester hard yarns into the polyester hard canvas according to the density of 2 to 6 yarns per centimeter in the radial direction and the density of 2 to 6 yarns per centimeter of the wefts by using a weaving machine to weave the warps and the wefts together according to the density of 2 to 6 yarns per centimeter.
9. The method for manufacturing the anti-tearing conveying belt by using the polyester hard yarns as claimed in claim 7, wherein the method comprises the following steps: and c, in the step c, calendering and molding, namely, putting the knitted terylene hard canvas on a four-roller calender, and combining the knitted terylene hard canvas with a covering rubber material extruded by two rollers on the four-roller calender and a covering rubber material extruded by two rollers at the lower part for one-time calendering and molding.
10. The method for manufacturing the anti-tearing conveying belt by using the terylene hard thread manufactured according to any one of claims 1 to 6 according to claim 7, wherein the method comprises the following steps: the temperature of the high-temperature vulcanization in the step d is 130-155 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110465287.5A CN113199724A (en) | 2021-04-28 | 2021-04-28 | Method for manufacturing polyester hard thread and method for manufacturing anti-tearing conveying belt by using polyester hard thread |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110465287.5A CN113199724A (en) | 2021-04-28 | 2021-04-28 | Method for manufacturing polyester hard thread and method for manufacturing anti-tearing conveying belt by using polyester hard thread |
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| CN113199724A true CN113199724A (en) | 2021-08-03 |
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| CN202110465287.5A Pending CN113199724A (en) | 2021-04-28 | 2021-04-28 | Method for manufacturing polyester hard thread and method for manufacturing anti-tearing conveying belt by using polyester hard thread |
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