CN114434769A - PVC heat shrinkage film preparation system and method - Google Patents
PVC heat shrinkage film preparation system and method Download PDFInfo
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- CN114434769A CN114434769A CN202210134747.0A CN202210134747A CN114434769A CN 114434769 A CN114434769 A CN 114434769A CN 202210134747 A CN202210134747 A CN 202210134747A CN 114434769 A CN114434769 A CN 114434769A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000001125 extrusion Methods 0.000 claims abstract description 93
- 238000004140 cleaning Methods 0.000 claims abstract description 59
- 239000002994 raw material Substances 0.000 claims abstract description 53
- 229920001169 thermoplastic Polymers 0.000 claims abstract description 25
- 239000004416 thermosoftening plastic Substances 0.000 claims abstract description 25
- 230000001681 protective effect Effects 0.000 claims abstract description 24
- 239000007921 spray Substances 0.000 claims abstract description 13
- 230000005389 magnetism Effects 0.000 claims abstract description 10
- 229920006257 Heat-shrinkable film Polymers 0.000 claims abstract description 7
- 238000007790 scraping Methods 0.000 claims description 36
- 239000010865 sewage Substances 0.000 claims description 14
- 239000011347 resin Substances 0.000 claims description 9
- 229920005989 resin Polymers 0.000 claims description 9
- 229920006300 shrink film Polymers 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 6
- 239000012760 heat stabilizer Substances 0.000 claims description 4
- 239000000314 lubricant Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000010408 film Substances 0.000 description 32
- 239000007788 liquid Substances 0.000 description 17
- 230000000694 effects Effects 0.000 description 6
- 238000007664 blowing Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 238000004806 packaging method and process Methods 0.000 description 4
- 238000005406 washing Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 230000005347 demagnetization Effects 0.000 description 2
- 230000003670 easy-to-clean Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000010096 film blowing Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009740 moulding (composite fabrication) Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 239000012745 toughening agent Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- 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
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/27—Cleaning; Purging; Avoiding contamination
- B29C48/2715—Cleaning; Purging; Avoiding contamination of plasticising units
-
- 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
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
- B29K2027/06—PVC, i.e. polyvinylchloride
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention belongs to the technical field of PVC thermoplastic film preparation, and particularly relates to a PVC heat shrinkable film preparation system and a method, which comprises a protective shell, a machine barrel, an extrusion screw and a cleaning unit, wherein the cleaning unit comprises a high-pressure spray head, a support plate and scrapers; according to the invention, the magnetic block is fixedly connected to the bottom of the scraper, and the magnetism generated by electrifying the electromagnet is the same as that of the magnetic block on the opposite surface, so that the magnetism generated by electrifying the electromagnet generates repulsion force on the magnetic block, the scraper moves upwards to be contacted with the outer wall of the extrusion blade on the extrusion screw, the adhered raw materials on the extrusion blade are scraped, the raw materials which are difficult to clean are prevented from being adhered on the extrusion blade, and therefore, a person does not need to wipe the extrusion blade independently, the cleaning efficiency is improved, and the hand of the person is prevented from being scratched by the extrusion blade.
Description
Technical Field
The invention belongs to the technical field of PVC thermoplastic film preparation, and particularly relates to a PVC heat shrinkable film preparation system and method.
Background
The PVC heat shrinkable film is a thin film, is formed by mixing ethylene PVC resin with more than ten auxiliary materials and then blowing for the second time, has the characteristics of good transparency, easy shrinkage, high strength, free adjustment of shrinkage rate according to the needs of users and strong operability, and is widely applied to the packaging fields of wine, food, sports goods, sterilized tableware, electronic and electric appliances, daily necessities and the like;
the current PVC thermoplastic film manufacturing process mainly comprises the following steps: the preparation method comprises the steps of raw material mixing, high-temperature melt extrusion, primary film forming, heating, blowing, formed film winding, slitting, folding and packaging, wherein the PVC film can be completely prepared from the raw materials through the steps, and the high-temperature melt extrusion is one of important process flows in the preparation process of the PVC thermoplastic film.
Before the existing extruder processes PVC mixed raw materials and after the extruder processes the PVC mixed raw materials, the internal processing area of the extruder needs to be strictly checked and cleaned, so that impurities such as foreign matters or metals existing in the processing area are prevented from causing damage to an internal extrusion screw rod when the extruder works, and the quality of a prepared PVC thermoplastic film is also influenced due to the fact that the foreign matters are mixed in the raw materials; at present, the processing area of the extruder is mainly cleaned manually, because the extruder is internally provided with an extrusion screw, the manual cleaning is time-consuming and labor-consuming under the interference of the extrusion screw, and the condition of unclean cleaning also exists.
In view of the above, the present invention provides a PVC heat shrinkable film preparation system and method to solve the above technical problems.
Disclosure of Invention
The invention provides a PVC heat shrinkage film preparation system and method, aiming at making up for the defects of the prior art and solving the technical problems of difficult cleaning, time and labor waste and the like of an extruder adopted in the existing PVC heat shrinkage film preparation process.
The technical scheme adopted by the invention for solving the technical problem is as follows:
the invention relates to a PVC heat shrinkage film preparation system, which comprises:
the protection shell is an inherent protection device of the existing extruder;
the driving unit is used for driving the extruder to operate for processing;
the outer side of the protective shell is fixedly connected with a feeding pipe and a discharging pipe respectively;
the machine barrel is fixedly connected to the inner wall of the protective shell, an extrusion screw is rotatably connected to the interior of the machine barrel, and extrusion blades are uniformly distributed on the extrusion screw;
further comprising:
the cleaning unit is arranged on the outer side of the machine barrel and is used for cleaning the interior of the machine barrel and the extrusion screw.
The cleaning unit includes:
the high-pressure spray head is fixedly connected to the outer wall of the upper side of the machine barrel;
the supporting plate is movably connected to the bottom of the machine barrel in a sealing mode;
the bottom of backup pad has linked firmly the telescopic link, the telescopic link is used for driving the backup pad to reciprocate.
Preferably, the joints of the two ends of the supporting plate and the bottom of the machine barrel are stepped.
Preferably, the inside of the supporting plate is fixedly connected with an electromagnet, and a circuit of the electromagnet and the telescopic rod is in a series mode.
Preferably, scrapers are connected to the inner part of the supporting plate in a sliding manner, and two adjacent scrapers are located on two sides of the extrusion blade on the extrusion screw;
the width of a gap between every two adjacent scraping plates is adapted to the thickness of an extrusion blade on the extrusion screw;
the bottom of the scraper is fixedly connected with a magnetic block, and the outer walls of two sides of the scraper are made of plastic materials;
the magnetism generated by electrifying the electromagnet is the same as that of the magnetic block on the opposite surface.
Preferably, a scraping groove is formed in one surface of the scraping plate, which is adjacent to the extrusion blade on the extrusion screw;
the scraper blade and the surface which is vertical to the scraper groove are provided with a discharge hole.
Preferably, the scraping grooves are uniformly formed in the outer wall of one side of the scraping plate.
Preferably, the high-pressure spray head is positioned between adjacent extrusion blades on the extrusion screw;
the magnetic sheet is rotatably connected inside the high-pressure nozzle;
the magnetic sheet with the inner wall top of high pressure nozzle is provided with the stopper, makes the magnetic sheet only can to the delivery port direction of high pressure nozzle rotates.
Preferably, a sewage discharge pipe is fixedly connected to the bottom of the protective shell adjacent to the discharge pipe;
the plane of the bottom of the protective shell is in an inclined state, and the inclined direction points to the sewage discharge pipe.
Preferably, crushing rods are arranged on two sides of the machine barrel and are in rotating connection with the inner wall of the protective shell.
A preparation method of a PVC heat shrinkage film is suitable for the PVC thermoplastic film preparation system, and comprises the following steps:
s1: firstly, starting a cleaning unit by personnel to clean the interior of a machine barrel by parts in the cleaning unit, discharging the cleaned sewage through a blow-off pipe, and after cleaning is finished, starting the machine barrel by the personnel and heating an extrusion screw to dry the interior of the machine barrel;
s2: weighing and selecting 10kg of PVC resin particles, 0.4-0.5kg of flexibilizer, 0.1-0.25kg of heat stabilizer, 0.25kg of ACR resin and 0.5kg of lubricant, then mixing the weighed and selected raw materials and pouring the mixture into a feeding pipe in an extruder;
s3: then, starting the extruder by personnel, so that the raw materials in the machine barrel are melted and mixed by the extrusion screw under the driving of the driving unit, and extruding the melted raw materials through the discharge pipe;
s4: then, the personnel start the cleaning unit again, so that the parts in the cleaning unit clean the interior of the machine barrel, and the interior of the machine barrel can be kept clean without processing;
s5: the extruded raw materials are subjected to inflation molding through the existing inflation equipment, then transferred to the next procedure for rolling, and are subjected to slitting and folding, and finally, the prepared PVC thermoplastic film is packaged by personnel, so that the preparation of the PVC thermoplastic film is completed.
The invention has the following beneficial effects:
1. according to the PVC thermal contraction film preparation system and method, high-pressure cleaning liquid is released through the high-pressure spray head to wash the machine barrel and the extrusion screw, meanwhile, the telescopic rod drives the supporting plate to be separated from the bottom of the machine barrel, so that residual raw materials on the machine barrel and the extrusion screw flow out from the bottom of the machine barrel along with cleaning liquid, the extruder is prevented from not running for a long time, the mixed raw materials residual on the machine barrel and the extrusion screw corrode the inside, meanwhile, the PVC thermal contraction film preparation system and method are convenient for subsequent processing, more mixed raw materials cannot remain in the machine barrel, the quality of a PVC thermoplastic film is influenced, and the problem that a worker is difficult to manually operate and clean is solved.
2. According to the PVC heat shrinkage film preparation system and method, the magnetic blocks are fixedly connected to the bottoms of the scraping plates, and the magnetism generated by electrifying the electromagnets is the same as that of the magnetic blocks on the opposite surfaces, so that the magnetism generated by electrifying the electromagnets generates repulsion force on the magnetic blocks, the scraping plates move upwards, the gap width between every two adjacent scraping plates is matched with the thickness of the extruding blade on the extruding screw, the outer walls of the upwards-moved scraping plates are in contact with the outer walls of the extruding blades on the extruding screw, the scraping plates scrape the adhesion raw materials on the extruding blades, the adhesion raw materials which are not easy to clean on the extruding blades are prevented, personnel do not need to wipe the extruding blades independently, and the cleaning effect of the extruding screw is improved.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a perspective view of the device of the present invention;
FIG. 2 is a partial cutaway perspective view of the device of the present invention;
FIG. 3 is a schematic perspective view of the cleaning unit of the present invention in connection with a barrel;
FIG. 4 is a schematic perspective view of the connection of the support plate and the extrusion screw of the present invention;
FIG. 5 is a schematic perspective view of the squeegee movement of the present invention;
FIG. 6 is a cross-sectional view of a high pressure showerhead of the present invention;
FIG. 7 is a perspective view of the squeegee of the invention;
FIG. 8 is a flow chart of the method for preparing the PVC thermoplastic film of the present invention.
In the figure: 1. a protective shell; 11. a drive unit; 12. a feeding pipe; 13. a discharge pipe; 14. a blow-off pipe; 2. a cleaning unit; 21. a barrel; 22. extruding a screw; 23. a high pressure spray head; 231. a magnetic sheet; 24. a support plate; 241. a telescopic rod; 25. a squeegee; 251. scraping the groove; 252. a discharge hole; 3. the straw is crushed.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
The embodiment of the invention provides a PVC heat shrinkable film preparation system and a method, and solves the technical problems that an extruder adopted in the existing PVC heat shrinkable film preparation process is difficult to clean, time-consuming and labor-consuming and the like;
in order to solve the technical problems, the technical scheme in the embodiment of the invention has the following general idea: high-pressure cleaning liquid is released through the high-pressure spray head 23 to wash the machine barrel 21 and the extrusion screw 22, meanwhile, the telescopic rod 241 drives the supporting plate 24 to be separated from the bottom of the machine barrel 21, so that residual raw materials on the machine barrel 21 and the extrusion screw 22 flow out from the bottom of the machine barrel 21 along with the cleaning liquid, the extruder is prevented from not running for a long time, the residual mixed raw materials on the machine barrel 21 and the extrusion screw 22 corrode the inside, meanwhile, more mixed raw materials cannot be remained in the machine barrel 21 during subsequent processing, the quality of a PVC thermoplastic film is influenced, and the problem that a worker is difficult to manually operate and clean is solved;
in order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
As shown in fig. 1 to 8, an embodiment of the present invention provides a PVC heat shrink film preparation system, including:
the extruder protection device comprises a protection shell 1, wherein the protection shell 1 is an inherent protection device of the existing extruder;
the driving unit 11 is used for driving the extruder to run for processing;
the outer side of the protective shell 1 is fixedly connected with a feeding pipe 12 and a discharging pipe 13 respectively;
the machine barrel 21 is fixedly connected to the inner wall of the protective shell 1, an extrusion screw 22 is rotatably connected to the interior of the machine barrel 21, and extrusion blades are uniformly distributed on the extrusion screw 22;
further comprising:
a cleaning unit 2, the cleaning unit 2 being disposed outside the cylinder 21, the cleaning unit 2 being used for cleaning the inside of the cylinder 21 and the extrusion screw 22.
The cleaning unit 2 includes:
a high pressure spray head 23, wherein the high pressure spray head 23 is fixedly connected to the upper outer wall of the machine barrel 21;
a supporting plate 24, wherein the supporting plate 24 is movably and hermetically connected to the bottom of the machine barrel 21;
the bottom of the supporting plate 24 is fixedly connected with a telescopic rod 241, and the telescopic rod 241 is used for driving the supporting plate 24 to move up and down.
In this embodiment, firstly, the person selects the appropriate amount of the PVC thermoplastic film raw material, and selects: 10kg of PVC resin particles, 0.4-0.5kg of toughening agent, 0.1-0.25kg of heat stabilizer, 0.25kg of ACR resin and 0.5kg of lubricant; meanwhile, a person starts the cleaning unit 2 in the extruder to operate, so that the high-pressure spray head 23 in the cleaning unit 2 is opened, high-pressure cleaning liquid is released to wash the machine barrel 21 and the extrusion screw 22, the driving unit 11 drives the extrusion screw 22 to rotate, extrusion blades on the extrusion screw 22 can be washed by the high-pressure cleaning liquid at each position, the telescopic rod 241 at the arc bottom of the supporting plate 24 is electrified and operates, the telescopic rod 241 contracts to drive the supporting plate 24 to be separated from the bottom of the machine barrel 21, so that the cleaning liquid can flow out from the bottom of the machine barrel 21, and impurities in the machine barrel 21 can be carried to flow together in the flowing process of the cleaning liquid, so that the inside of the machine barrel 21 is cleaned, the protective shell 1 of the extruder does not need to be opened by the person, the inside of the machine barrel 21 is cleaned in a wiping mode, and interference exists in the inside of the machine barrel 21 by the extrusion blades on the extrusion screw 22, the cleaning process of the personnel is difficult, time-consuming and labor-consuming, and the hands of the personnel can be scratched by the extrusion blades on the extrusion screw 22 when the hands of the personnel extend into the position of the extrusion screw 22;
after cleaning, a person starts a heating device arranged in the machine barrel 21 and the extrusion screw 22 to dry, the telescopic rod 241 resets and drives the supporting plate 24 to be attached to the bottom of the machine barrel 21 again, after drying, the person mixes the weighed and selected raw materials and pours the raw materials into the feeding pipe 12 in the extruder, the person starts the driving unit 11 in the extruder, so that the driving unit 11 drives the extrusion screw 22 to rotate, the machine barrel 21 and the extrusion screw 22 heat to melt the mixed raw materials, then the melted raw materials are extruded through the extrusion screw 22, the melted raw materials are pressurized and discharged from the discharging pipe 13, wherein the discharging pipe is connected with a blowing device in the next process, the blowing device is the existing thermoplastic film blowing device, then the extruded raw materials are blown through the blowing device to form thermoplastic films, and then the person winds the formed thermoplastic films, then packaging after slitting and finishing so as to finish the preparation of the PVC thermoplastic film;
after thermoplastic film preparation is accomplished, then personnel start cleaning unit 2 in the extruder again, make high pressure nozzle 23 release high pressure cleaning fluid once more and wash barrel 21 and extrusion screw 22, telescopic link 241 drives the bottom separation of backup pad 24 and barrel 21 simultaneously, make remaining raw materials on barrel 21 and the extrusion screw 22 follow the washing liquid and flow out from the bottom of barrel 21, prevent that the extruder from not operating for a long time, remaining mixed raw materials causes the corruption to inside on barrel 21 and the extrusion screw 22, also make things convenient for during subsequent processing simultaneously, barrel 21 is inside can not remain more mixed raw materials, influence the quality of PVC thermoplastic film, the comparatively difficult problem in personnel manual operation clearance process has been solved.
As shown in fig. 4-5, the junction of the two ends of the support plate 24 and the bottom of the barrel 21 is stepped;
an electromagnet is fixedly connected inside the supporting plate 24, and a circuit of the electromagnet and the telescopic rod 241 is in a series mode;
the width of the gap between two adjacent scraping plates 25 is adapted to the thickness of the extrusion blade on the extrusion screw 22;
the bottom of the scraper 25 is fixedly connected with a magnet, and the outer walls of two sides of the scraper 25 are made of non-magnetic metal;
the magnetism generated by electrifying the electromagnet is the same as that of the magnetic block on the opposite surface.
Furthermore, the connecting part between the two ends of the supporting plate 24 and the bottom of the machine barrel 21 is step-shaped, so that when the supporting plate 24 is attached to the bottom of the machine barrel 21, compared with straight-slit splicing, the mixed raw materials in the machine barrel 21 can be prevented from flowing out from the connecting part between the supporting plate 24 and the machine barrel 21 after being extruded, and the waste of the raw materials is avoided; meanwhile, the supporting plate 24 is fixedly connected with an electromagnet, and a circuit of the electromagnet and the telescopic rod 241 is in a series mode, so when the interior of the machine barrel 21 needs to be cleaned, the telescopic rod 241 is electrified to drive the supporting plate 24 to be separated from the bottom of the machine barrel 21, the electromagnet in the supporting plate 24 is also electrified, the bottom of the scraper 25 is fixedly connected with a magnetic block which can resist high temperature, the demagnetization temperature of the magnetic block is about 750 ℃, and the processing temperature in the extruder is about 200 ℃, so that the high-temperature demagnetization condition cannot occur, the magnetism generated by electrifying the electromagnet is the same as that of the magnetic block on the opposite surface, the magnetism generated by electrifying the electromagnet generates repulsion force on the magnetic block, the scraper 25 moves upwards, the outer walls on the two sides of the scraper 25 are non-magnetic metal, an aluminum plate can be preferably selected, the electromagnet can resist high temperature of about 600 ℃, and can sufficiently bear the temperature generated when the interior of the extruder is processed, therefore, the magnetism generated by the electromagnet cannot influence the outer walls of the two sides of the scraper 25, so that the scraper 25 can move upwards normally; and the width of the gap between every two adjacent scraping plates 25 is matched with the thickness of the extrusion blade on the extrusion screw 22, so that the outer wall of the scraper 25 which moves upwards is contacted with the outer wall of the extrusion blade on the extrusion screw 22, the adhesion raw material on the extrusion blade is scraped by the scraping plates 25, the raw material which is not easy to clean is prevented from being adhered on the extrusion blade, the extrusion blade is not required to be cleaned by personnel independently, and the cleaning effect of the extrusion screw is improved.
As shown in fig. 7, a scraping groove 251 is formed on one surface of the scraping plate 25 adjacent to the extrusion blade on the extrusion screw 2;
the scraper 25 and one surface perpendicular to the scraper groove 251 are provided with a discharge hole 252;
the scraping grooves 251 are uniformly opened on the single-side outer wall of the scraping plate 25.
Furthermore, the scraping plate 25 is provided with a scraping groove 251, after the outer wall of the scraping plate 25 is contacted with the outer wall of the extrusion blade on the extrusion screw 22, after the residual raw materials on the extrusion blade are scraped by the scraping plate 25, some fine raw materials enter the scraping groove 251 under the action of water flow and are then discharged through the discharge hole 252, and the scraping grooves 251 are uniformly formed in the outer wall of one side of the scraping plate 25, so that the raw materials can rapidly enter the scraping groove 251 without accumulation, the residual raw materials are prevented from being mixed between the scraping plate 25 and the extrusion blade, the cleaning effect of the scraping plate 25 is influenced, and hard impurities are prevented from being remained in the raw materials, so that the surface of the extrusion blade is scraped when the raw materials rub against the extrusion blade back and forth; and the outer edge of the scraping groove 251 can scrape the outer wall of the extrusion blade, so that the cleaning effect of the scraping plate 25 is improved.
As shown in fig. 3 and 6, the high pressure nozzle 23 is located between adjacent extrusion blades on the extrusion screw 22;
the magnetic sheet 231 is rotatably connected inside the high-pressure nozzle 23;
the magnetic sheet 231 and the upper portion of the inner wall of the high-pressure nozzle 23 are provided with limiting blocks, so that the magnetic sheet 231 can only rotate towards the direction of the water outlet of the high-pressure nozzle 23.
In this embodiment, when the normal thermoplastic film preparation during operation that carries out of extruder, magnetic sheet 231 in the high pressure nozzle 23 adsorbs on the stopper, make magnetic sheet 231 only can rotate to the delivery port direction of high pressure nozzle 23, when can preventing to mix raw materials melt extrusion in barrel 21, the raw materials enters into the inside of high pressure nozzle 23 through the delivery port of high pressure nozzle 23, cause high pressure nozzle 23 to block up, unable normal work, when high pressure nozzle 23 blowout high pressure cleaning liquid, the washing liquid can promote magnetic sheet 231 to rotate to high pressure nozzle 23 delivery port, and do not have the effect of blockking of stopper, guarantee that the washing liquid can normally spout and clear up the inside of barrel 21.
As shown in fig. 2-3, a sewage discharge pipe 14 is fixedly connected to the bottom of the protective shell 1 adjacent to the discharge pipe 13;
the plane at the bottom of the protective shell 1 is in an inclined state, and the inclined direction points to the sewage discharge pipe 14;
crushing rods 3 are arranged on two sides of the machine barrel 21, and the end parts of the crushing rods 3 are rotatably connected with the inner wall of the protective shell 1.
Further, when the cleaning unit 2 performs cleaning work and the driving unit 11 drives the crushing rod 3 to rotate, when cleaning liquid containing residual raw materials and impurities flows to the bottom of the protective shell 1 through the bottom of the machine barrel 21, the crushing rod 3 rotates to crush the residual raw materials with larger diameter in the liquid, so that the residual raw materials with larger diameter remained in the liquid are prevented from blocking the sewage discharge pipe 14; and the plane of the bottom of the protective shell 1 is in an inclined state, and the inclined direction points to the sewage discharge pipe 14, so that the discharged liquid can flow to the sewage discharge pipe 14 more easily, and the situation of liquid accumulation at the bottom of the protective shell 1 is avoided.
A preparation method of a PVC heat shrinkage film is suitable for the PVC thermoplastic film preparation system, and comprises the following steps:
s1: firstly, starting a cleaning unit 2 by a person, cleaning the interior of a machine barrel 21 by parts in the cleaning unit 2, discharging the cleaned sewage through a sewage discharge pipe 14, and after cleaning is finished, starting the machine barrel 21 and an extrusion screw 22 by the person for heating to dry the interior of the machine barrel 21;
s2: weighing and selecting 10kg of PVC resin particles, 0.4-0.5kg of flexibilizer, 0.1-0.25kg of heat stabilizer, 0.25kg of ACR resin and 0.5kg of lubricant, then mixing the weighed and selected raw materials and pouring the mixture into a feeding pipe 12 in an extruder;
s3: then, the person starts the extruder, so that the extrusion screw 22 performs melt mixing on the raw materials in the machine barrel 21 under the driving of the driving unit 11, and extrudes the melted raw materials through the discharge pipe 13;
s4: then, the personnel start the cleaning unit 2 again, so that the parts in the cleaning unit 2 clean the interior of the machine barrel 21, and the interior of the machine barrel 21 can be kept clean without processing;
s5: and (3) performing inflation molding on the extruded raw materials through the existing inflation equipment, then transferring the raw materials to the next procedure for rolling, splitting and folding, and finally packaging the prepared PVC thermoplastic film by personnel to finish the preparation of the PVC thermoplastic film.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are merely intended to facilitate the description of the present invention and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the scope of the present invention.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A PVC heat shrink film production system comprising:
the extruder comprises a protective shell (1), wherein the protective shell (1) is an inherent protective device of an existing extruder;
the driving unit (11) is used for driving the extruder to run for processing;
the outer side of the protective shell (1) is fixedly connected with a feeding pipe (12) and a discharging pipe (13) respectively;
the machine barrel (21) is fixedly connected to the inner wall of the protective shell (1), an extrusion screw (22) is rotatably connected to the interior of the machine barrel (21), and extrusion blades are uniformly distributed on the extrusion screw (22);
it is characterized by also comprising:
a cleaning unit (2), the cleaning unit (2) being arranged outside the barrel (21), the cleaning unit (2) being used for cleaning the inside of the barrel (21) and the extrusion screw (22).
The cleaning unit (2) comprises:
the high-pressure spray head (23) is fixedly connected to the outer wall of the upper side of the machine barrel (21);
the supporting plate (24), the supporting plate (24) is movably and hermetically connected to the bottom of the machine barrel (21);
the bottom of backup pad (24) has linked firmly telescopic link (241), telescopic link (241) are used for driving backup pad (24) and reciprocate.
2. The PVC heat shrink film preparation system of claim 1, wherein: the joints of the two ends of the supporting plate (24) and the bottom of the machine barrel (21) are step-shaped.
3. The PVC heat shrink film preparation system of claim 2, wherein: the inside of backup pad (24) is linked firmly the electro-magnet, the electro-magnet with the circuit of telescopic link (241) is the series connection mode.
4. The PVC heat shrink film preparation system of claim 1, wherein: scrapers (25) are connected to the inner part of the supporting plate (24) in a sliding manner, and two adjacent scrapers (25) are positioned on two sides of an extrusion blade on the extrusion screw (22);
the width of a gap between two adjacent scraping plates (25) is adapted to the thickness of an extrusion blade on the extrusion screw (22);
the bottom of the scraper (25) is fixedly connected with a magnetic block, and the outer walls of two sides of the scraper (25) are made of non-magnetic metal;
the magnetism generated by electrifying the electromagnet is the same as that of the magnetic block on the opposite surface.
5. The PVC heat shrink film preparation system of claim 4, wherein: a scraping groove (251) is formed in one surface, adjacent to the extrusion blade on the extrusion screw (2), of the scraping plate (25);
the scraper (25) is provided with a discharge hole (252) on the surface perpendicular to the surface provided with the scraping groove (251).
6. The PVC heat shrinkable film preparation system of claim 5, wherein: the scraping grooves (251) are uniformly formed in a plurality on the outer wall of one side of the scraping plate (25).
7. The PVC heat shrink film preparation system of claim 1, wherein: the high-pressure spray head (23) is positioned between adjacent extrusion blades on the extrusion screw (22);
the inside of the high-pressure nozzle (23) is rotatably connected with a magnetic sheet (231);
the magnetic sheet (231) and the upper portion of the inner wall of the high-pressure spray head (23) are provided with limiting blocks, so that the magnetic sheet (231) can only rotate towards the direction of a water outlet of the high-pressure spray head (23).
8. The PVC heat shrink film preparation system of claim 1, wherein: a sewage discharge pipe (14) is fixedly connected to the bottom of the protective shell (1) adjacent to the discharge pipe (13);
the plane at the bottom of the protective shell (1) is in an inclined state, and the inclined direction points to the sewage discharge pipe (14).
9. The PVC heat shrink film preparation system of claim 1, wherein: the crushing rod (3) is arranged on two sides of the machine barrel (21), and the end part of the crushing rod (3) is rotatably connected with the inner wall of the protective shell (1).
10. A preparation method of a PVC heat shrinkage film is characterized by comprising the following steps: the method is applicable to the PVC thermoplastic film preparation system of any one of claims 1 to 9, and comprises the following steps:
s1: firstly, a person starts the cleaning unit (2) to clean the interior of the machine barrel (21) by parts in the cleaning unit (2), the cleaned sewage is discharged through the sewage discharge pipe (14), and the person starts the machine barrel (21) and the extrusion screw (22) to heat and dry the interior of the machine barrel (21) after cleaning;
s2: weighing and selecting 10kg of PVC resin particles, 0.4-0.5kg of flexibilizer, 0.1-0.25kg of heat stabilizer, 0.25kg of ACR resin and 0.5kg of lubricant, then mixing the weighed and selected raw materials and pouring the mixture into a feeding pipe (12) in an extruder;
s3: then, starting the extruder by a person, so that the extrusion screw (22) is driven by the driving unit (11) to melt and mix the raw materials in the cylinder (21), and extruding the melted raw materials through the discharge pipe (13);
s4: then, the personnel start the cleaning unit (2) again, so that the parts in the cleaning unit (2) clean the interior of the machine barrel (21) and ensure that the interior of the machine barrel (21) can be kept clean without processing;
s5: the extruded raw materials are subjected to inflation molding through the existing inflation equipment, then transferred to the next procedure for rolling, and are subjected to slitting and folding, and finally, the prepared PVC thermoplastic film is packaged by personnel, so that the preparation of the PVC thermoplastic film is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210134747.0A CN114434769B (en) | 2022-02-14 | PVC (polyvinyl chloride) heat-shrinkable film preparation system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210134747.0A CN114434769B (en) | 2022-02-14 | PVC (polyvinyl chloride) heat-shrinkable film preparation system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114434769A true CN114434769A (en) | 2022-05-06 |
| CN114434769B CN114434769B (en) | 2024-07-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115179525A (en) * | 2022-09-14 | 2022-10-14 | 张家港市弗兰德机械有限公司 | Plastic granulator capable of avoiding formation of condensation state |
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| CN106827277A (en) * | 2017-04-07 | 2017-06-13 | 宜兴市光辉包装材料有限公司 | Static mixer and PVC heat shrink films blow molding preparation methods |
| CN113878838A (en) * | 2021-09-28 | 2022-01-04 | 北京工商大学 | Double-screw extruder with automatic cleaning device |
| CN215703889U (en) * | 2021-07-07 | 2022-02-01 | 苏州恒则成精密橡塑有限公司 | Environment-friendly nitrile rubber extrusion molding device |
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106827277A (en) * | 2017-04-07 | 2017-06-13 | 宜兴市光辉包装材料有限公司 | Static mixer and PVC heat shrink films blow molding preparation methods |
| CN215703889U (en) * | 2021-07-07 | 2022-02-01 | 苏州恒则成精密橡塑有限公司 | Environment-friendly nitrile rubber extrusion molding device |
| CN113878838A (en) * | 2021-09-28 | 2022-01-04 | 北京工商大学 | Double-screw extruder with automatic cleaning device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115179525A (en) * | 2022-09-14 | 2022-10-14 | 张家港市弗兰德机械有限公司 | Plastic granulator capable of avoiding formation of condensation state |
| CN115179525B (en) * | 2022-09-14 | 2022-11-29 | 张家港市弗兰德机械有限公司 | Plastic granulator capable of avoiding formation of condensation state |
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