CN117301459A - Self-sealing strip production device and production method - Google Patents
Self-sealing strip production device and production method Download PDFInfo
- Publication number
- CN117301459A CN117301459A CN202311174916.4A CN202311174916A CN117301459A CN 117301459 A CN117301459 A CN 117301459A CN 202311174916 A CN202311174916 A CN 202311174916A CN 117301459 A CN117301459 A CN 117301459A
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- self
- sealing strip
- coating
- roller
- chain
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- 238000007789 sealing Methods 0.000 title claims abstract description 233
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 36
- 238000000576 coating method Methods 0.000 claims abstract description 188
- 239000011248 coating agent Substances 0.000 claims abstract description 187
- 239000003973 paint Substances 0.000 claims abstract description 47
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 238000001125 extrusion Methods 0.000 claims abstract description 35
- 238000003825 pressing Methods 0.000 claims abstract description 25
- 229920003023 plastic Polymers 0.000 claims abstract description 16
- 239000004033 plastic Substances 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 238000001035 drying Methods 0.000 claims description 44
- 238000001816 cooling Methods 0.000 claims description 18
- 238000007667 floating Methods 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 18
- 238000004804 winding Methods 0.000 claims description 14
- 238000001514 detection method Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 9
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 5
- 238000007664 blowing Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 229920001577 copolymer Polymers 0.000 claims description 3
- 229920006242 ethylene acrylic acid copolymer Polymers 0.000 claims description 3
- 239000012208 gear oil Substances 0.000 claims description 3
- 229920000058 polyacrylate Polymers 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000007493 shaping process Methods 0.000 claims 1
- 238000012545 processing Methods 0.000 abstract description 2
- 239000000123 paper Substances 0.000 description 25
- 238000004806 packaging method and process Methods 0.000 description 9
- 238000005096 rolling process Methods 0.000 description 5
- 239000011247 coating layer Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000002655 kraft paper Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 239000012775 heat-sealing material Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000007665 sagging Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000009974 thixotropic effect Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
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
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0021—Combinations of extrusion moulding with other shaping operations combined with joining, lining or laminating
-
- 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
- B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
- B29C37/0092—Drying moulded articles or half products, e.g. preforms, during or after moulding or cooling
-
- 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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
-
- 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
- B29C65/52—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 way of applying the adhesive
- B29C65/526—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 way of applying the adhesive by printing or by transfer from the surfaces of elements carrying the adhesive, e.g. using brushes, pads, rollers, stencils or silk screens
-
- 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
- B29C66/024—Thermal pre-treatments
- B29C66/0242—Heating, or preheating, e.g. drying
-
- 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
- B29C66/90—Measuring or controlling the joining process
- B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
- B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
- B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
- B29C66/91231—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature of the joining tool
-
- 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
- B29L2031/712—Containers; Packaging elements or accessories, Packages
- B29L2031/7128—Bags, sacks, sachets
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Coating Apparatus (AREA)
Abstract
The invention discloses a self-sealing strip production device and a production method, which belong to the technical field of self-sealing strip processing and manufacturing, wherein the self-sealing strip production device comprises: a frame; the extrusion mechanism is arranged on the frame and is used for extruding the plastic raw materials to form a self-sealing strip male chain with a protrusion and a self-sealing strip female chain with a groove; the pressing mechanism is arranged on the frame and is used for pressing the cooled self-sealing strip male chain and the cooled self-sealing strip female chain to form a complete self-sealing strip; the coating mechanism is arranged on the frame and is used for coating water-based paint on two sides of the seal, the coating mechanism comprises two coating rollers, the two coating rollers are respectively positioned on two sides of the seal, the coating rollers are communicated with the paint warehouse through a conveying pipeline, a paint conveying pump is arranged on the conveying pipeline, the coating rollers are hollow cylindrical, and a plurality of coating through holes are uniformly distributed along the circumferential direction of the coating rollers.
Description
Technical Field
The invention relates to the technical field of self-sealing strip processing and manufacturing, in particular to a self-sealing strip production device and a self-sealing strip production method.
Background
The plastic packaging bag has various forms, the packaging bag with the self-sealing strip is firm in self-sealing, good in tightness and convenient to carry, and the opening of the packaging bag can be repeatedly opened and sealed due to the sealing property of the self-sealing strip, so that the plastic packaging bag with the self-sealing strip is one of the popular and widely used packaging bags.
Along with the enhancement of people's environmental protection consciousness, the wrapping bag is changing from plastic substrate to paper substrate fast transition, with the wrapping bag body that has from the strip of paper to the paper base after, because the paper base does not possess the heat-seal, can not realize the heat-seal between the bag body of paper base and the self-seal strip, has restricted the development of the self-sealing bag of paper base bag body.
The solution in the prior art is to apply water-based paint on the paper-based bag body, and heat sealing between the bag body and the self-sealing strip with heat sealing property is realized by using the water-based paint as a bridge. However, the existing self-sealing strip is not made of heat-sealing materials, and a considerable part of the self-sealing strip is not made of heat-sealing materials, so that the heat-sealing strength of the self-sealing strip and the paper-based bag body is poor, the whole sealing performance of the packaging bag is crossed, and the self-sealing strip is easy to fall off.
Disclosure of Invention
The invention aims at solving at least one of the technical problems in the prior art, and therefore, the invention provides a self-sealing strip production device and a production method, which can produce a self-sealing strip with a coating layer at low cost, are beneficial to realizing large-scale and continuous production of the self-sealing strip with the coating layer, and improve the heat sealing strength of the self-sealing strip and a paper-based packaging bag.
An apparatus for producing a self-sealing strip according to an embodiment of the first aspect of the present invention includes: a frame; the extrusion mechanism is arranged on the frame and is used for extruding the plastic raw materials to form a self-sealing strip male chain with a protrusion and a self-sealing strip female chain with a groove; the cooling mechanism is arranged on the frame and used for cooling the self-sealing strip male chain and the self-sealing strip female chain extruded from the extrusion mechanism; the pressing mechanism is arranged on the frame and is used for pressing the cooled self-sealing strip male chain and the cooled self-sealing strip female chain to form a complete self-sealing strip; the coating mechanism is arranged on the frame and used for coating water-based paint on two sides of the self-sealing strip, the coating mechanism comprises two coating rollers, the two coating rollers are respectively positioned on two sides of the self-sealing strip, the coating rollers are communicated with the paint warehouse through a conveying pipeline, a paint conveying pump is arranged on the conveying pipeline, the coating rollers are hollow cylindrical, and a plurality of coating through holes are uniformly distributed along the circumferential direction of the coating rollers; the drying mechanism is arranged on the frame and is used for drying the water-based paint on two sides of the self-sealing strip; the winding mechanism is arranged on the frame and is used for winding the dried self-sealing strip.
The self-sealing strip production device provided by the embodiment of the first aspect of the invention has at least the following beneficial effects: the self-sealing strip is extruded and shaped, and then the water-based paint is used for continuous coating, so that the self-sealing strip has the heat sealing or bonding performance, and the technical problems that most of the self-sealing strip materials in the prior art do not have heat sealing and bonding performance and cannot be subjected to heat sealing molding and firm bonding with widely used paper-based bags are solved.
According to some embodiments of the invention, the coating device further comprises a coating detection mechanism arranged between the coating mechanism and the drying mechanism, wherein the coating detection mechanism is used for detecting uniformity and integrity of the coating of the water-based paint on two sides of the sealing strip.
According to some embodiments of the invention, the coating roll comprises: the roller body is hollow cylindrical, and the coating through holes are uniformly distributed on the side wall surface of the roller body along the circumferential direction of the roller body; the conveying pipe is arranged in the roller body in a penetrating mode along the axis of the roller body, the conveying pipe is connected with the roller body through a bearing, connecting nozzles are arranged at two ends of the conveying pipe, the conveying pipe is communicated with the conveying pipe through the connecting nozzles, and the water-based paint is input into the roller body through the conveying pipe and is coated on the outer side of the self-sealing strip through rotation of the roller body.
According to some embodiments of the invention, the inner side of the roller body is provided with a temperature measuring piece and a heat exchanging piece, the temperature measuring piece is used for detecting the temperature of the paint in the roller body, and the heat exchanging piece is used for heating and cooling according to the temperature detected by the temperature measuring piece, so that the paint in the roller body keeps good fluidity and is coated on the self-sealing strip under proper temperature conditions.
According to some embodiments of the invention, the coating mechanism further comprises a floating support movably arranged on the frame, the coating roller is rotatably arranged on the floating support, and the distance and the angle of the coating roller relative to the self-sealing strip are adjusted through the floating support.
According to some embodiments of the invention, a floating mount comprises: the base is connected with the conveying pipe; the two push rods can be arranged on the frame in a back-and-forth movement mode, the two push rods are respectively connected with the left end and the right end of the base in a rotatable mode, the synchronous back-and-forth movement of the two push rods is controlled to adjust the distance between the coating roller and the self-sealing strip, and the back-and-forth movement of one push rod is independently controlled to adjust the angle of the coating roller relative to the self-sealing strip.
According to some embodiments of the invention, the floating support further comprises a plurality of positioning pulleys rotatably arranged on the base, wherein the positioning pulleys are tangential to the roller body, and the positioning pulleys are used for guaranteeing the rotation stability of the roller body.
According to some embodiments of the invention, the applicator roll is made of stainless steel material.
According to some embodiments of the invention, the paint delivery pump is a gear oil pump, a pneumatic diaphragm pump, or a screw pump.
According to some embodiments of the invention, the diameter of the coating through holes is 0.5mm to 1mm, and the distance between adjacent coating through holes is 1mm to 2mm.
According to some embodiments of the invention, the device further comprises a plurality of tensioning rollers respectively arranged between the pressing mechanism and the coating mechanism and between the drying mechanism and the winding mechanism.
According to some embodiments of the invention, the extrusion mechanism comprises a screw extruder, a feed end of the screw extruder is provided with a feed head, a discharge end of the screw extruder is provided with an extrusion die, and the screw extruder is in transmission connection with a screw driver.
According to some embodiments of the invention, the cooling mechanism comprises a cold air box, the cold air box is a hollow box body, one end of the cold air box is connected with the extrusion die, the other end of the cold air box is connected with the pressing mechanism, a self-sealing strip male chain and a self-sealing strip female chain formed in the extrusion die penetrate through the cold air box to reach the pressing mechanism, and the cold air box is communicated with the blowing piece.
According to a second aspect of the present invention, a self-sealing strip production method, to which the first aspect of the present invention is applied, includes:
step 1: putting plastic raw materials into an extrusion mechanism, and operating the extrusion mechanism to output a self-sealing strip male chain with a bulge and a self-sealing strip female chain with a groove;
step 2: the self-sealing strip male chain and the self-sealing strip female chain pass through a cold bellows to be cooled and shaped, and the cooled self-sealing strip male chain and the cooled self-sealing strip female chain are pressed by a pressing mechanism to form a complete self-sealing strip;
step 3: the self-sealing strip passes through the space between the two coating rollers, and the coating rollers are used for coating water-based paint on the two sides of the self-sealing strip;
step 4: the self-sealing strip with the water-based paint coated on two sides is used for drying the water-based paint on two sides of the self-sealing strip through a drying mechanism;
step 5: and the rolling mechanism rolls the dried self-sealing strip.
According to some embodiments of the invention, in step 3, the aqueous coating is applied in an amount of 0.5-3.5g/m2 and at a coating speed of 200-400m/min.
According to some embodiments of the present invention, in step 4, a hot air inlet type drying device is adopted, a high wind power air suction and exhaust system is arranged in the drying device, the drying temperature is 80-130 ℃, and the drying time is 2-12s.
According to some embodiments of the invention, the plastic material is PLA, PE, PP, PVC, TPU or PGA.
According to some embodiments of the invention, the aqueous coating is one or more of an ethylene acrylic acid copolymer, an acrylate polymer, a styrene/acrylate copolymer.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 is a schematic view of a self-sealing strip production device according to an embodiment of the present invention;
FIG. 2 is a schematic view of the coating mechanism of FIG. 1;
FIG. 3 is a front view of FIG. 2;
FIG. 4 is a cross-sectional view of the applicator roll of FIG. 2;
fig. 5 is a flow chart of a method of producing a self-sealing strip according to an embodiment of the present invention.
Reference numerals illustrate:
a frame 100;
an extrusion mechanism 200; a screw extruder 210; a feed block 220; an extrusion die 230; a screw driver 240;
a cooling mechanism 300; a cold wind box 310; a blowing member 320;
a press-fit mechanism 400;
a coating mechanism 500; a coating roller 510; coating the through hole 511; a roller 512; a feed conduit 513; a bearing 514; a connection nozzle 515; temperature measurement member 516; a heat exchange member 517; a floating mount 520; a base 521; a push rod 522; a positioning pulley 523;
a drying mechanism 600;
a winding mechanism 700;
a coating detection mechanism 800;
tensioning roller 900.
Detailed Description
Reference will now be made in detail to the present embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present invention, but not to limit the scope of the present invention.
In the description of the present invention, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present invention and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present invention can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
A self-sealing tape producing apparatus and a producing method according to an embodiment of the present invention are described with reference to fig. 1 to 5.
As shown in fig. 1 to 5, the self-sealing strip production apparatus according to an embodiment of the present invention includes: a frame 100; the extrusion mechanism 200 is arranged on the frame 100, and the extrusion mechanism 200 is used for extruding plastic raw materials to form a self-sealing strip male chain with a protrusion and a self-sealing strip female chain with a groove; the cooling mechanism 300 is arranged on the rack 100, and the cooling mechanism 300 is used for cooling the self-sealing strip male chain and the self-sealing strip female chain extruded from the extrusion mechanism 200; the pressing mechanism 400 is arranged on the frame 100, and the pressing mechanism 400 is used for pressing the cooled self-sealing strip male chain and the cooled self-sealing strip female chain to form a complete self-sealing strip; the coating mechanism 500 is arranged on the frame 100, the coating mechanism 500 is used for coating water-based paint on two sides of the self-sealing strip, the coating mechanism 500 comprises two coating rollers 510, the two coating rollers 510 are respectively positioned on two sides of the self-sealing strip, the coating rollers 510 are communicated with a paint warehouse through a conveying pipeline, a paint conveying pump is arranged on the conveying pipeline, the coating rollers 510 are hollow cylindrical, and a plurality of coating through holes 511 are uniformly distributed along the circumferential direction of the coating rollers 510; the drying mechanism 600 is arranged on the frame 100, and the drying mechanism 600 is used for drying the water-based paint on two sides of the self-sealing strip; the winding mechanism 700, winding mechanism 700 sets up on frame 100, and winding mechanism 700 is used for the reel after the drying from the strip.
Therefore, the water-based paint coating is additionally arranged on the self-sealing strip, so that the self-sealing strip can be heat-sealed or bonded with the paper-based packaging bag body widely used in the prior art no matter whether the self-sealing strip has heat-sealing property or not. And after the self-sealing strip is rapidly extruded and molded, continuous coating production is carried out. The sagging property and thixotropic property of single or multiple water-based paint can be satisfied by using the coating roller 510 and the matched device, and the coating uniformity of the self-sealing strip is improved. The coating device has the advantages of simple structure, quick assembly and disassembly, convenient replacement and assembly, accurate positioning, accurate metering, reduced water-based paint consumption and capability of meeting the requirement of continuous high-speed operation of a production line.
As shown in fig. 1, the present apparatus further includes a coating detection mechanism 800, wherein the coating detection mechanism 800 is disposed between the coating mechanism 500 and the drying mechanism 600, and the coating detection mechanism 800 is used for detecting the uniformity and integrity of the coating of the aqueous coating on both sides of the self-sealing strip. Therefore, the water-based paint is used as a bridge to realize the heat sealing of the paper bag body and the self-sealing strip, and the integrity and uniformity of the water-based paint coating directly influence the tightness between the self-sealing strip and the paper bag body and the connection firmness. The thickness and uniformity of the coating on two sides of the self-sealing strip are detected through the coating detection mechanism, so that the complete uniformity of the coating is ensured, the thickness reaches the standard, the sealing performance of the finished paper packaging bag can be ensured, and the durability of the self-sealing strip can be ensured.
As shown in fig. 2 to 4, the coating roller 510 includes: the roller body 512, the roller body 512 is in a hollow cylinder shape, and the coating through holes 511 are uniformly distributed on the side wall surface of the roller body 512 along the circumferential direction of the roller body 512; the conveying pipe 513, the conveying pipe 513 wears to establish in the roll body 512 along the axle center of roll body 512, is connected through bearing 514 between conveying pipe 513 and the roll body 512, and the both ends of conveying pipe 513 all are provided with connecting mouth 515, and conveying pipe 513 passes through connecting mouth 515 and conveying pipe intercommunication, and aqueous coating passes through conveying pipe 513 to input into the roll body 512 to pass through the rotation coating of roll body 512 and to the self-sealing strip outside. Thus, the aqueous coating material is continuously fed into the roller body 512 through the feed pipe 513, and the roller is rotated with respect to the feed pipe 513, so that the aqueous coating material in the roller body 512 is uniformly coated on both sides of the self-sealing strip through the coating through holes 511. The left and right ends of the delivery pipe 513 are both communicated with the delivery pipe through the connection nozzles 515, and the delivery pipe can synchronously supply the aqueous coating into the roller body 512 from the left and right sides, so that the speed and pressure of the supply are ensured to be constant, and the thickness of the coating layer finally formed outside the self-sealing strip is controlled.
As shown in fig. 4, a temperature measuring member 516 and a heat exchanging member 517 are disposed on the inner side of the roller body 512, the temperature measuring member 516 is used for detecting the temperature of the coating in the roller body 512, and the heat exchanging member 517 heats and cools according to the temperature detected by the temperature measuring member 516, so that the coating in the roller body 512 maintains good fluidity and is coated on the self-sealing tape under a proper temperature condition. During the coating process, temperature affects the coating flow and thus the thickness of the aqueous coating application, as well as the uniformity of the application. Therefore, by arranging the temperature measuring member 516 inside the roller 512, the temperature of the aqueous coating in the roller 512 is monitored in real time, and the temperature of the coating is regulated by the heat exchanging member 517, so that the coating maintains good fluidity and proper temperature, and the uniformity and the integrity of the coating formed on the self-sealing strip are further improved.
As shown in fig. 2 and 3, the coating mechanism 500 further includes a floating support 520, the floating support 520 is movably provided on the frame 100, the coating roller 510 is rotatably provided on the floating support 520, and the distance and angle of the coating roller 510 with respect to the self-sealing tape are adjusted by the floating support 520. Floating mount 520 includes: a base 521, the base 521 being connected to a feed conduit 513; the two push rods 522 are arranged on the frame 100 in a back-and-forth movement manner, the two push rods 522 are respectively and rotatably connected with the left end and the right end of the base 521, the distance between the coating roller 510 and the self-sealing strip can be adjusted by controlling the synchronous back-and-forth movement of the two push rods 522, and the angle of the coating roller 510 relative to the self-sealing strip can be adjusted by independently controlling the back-and-forth movement of one push rod 522. For example, when the coating detection mechanism 800 detects that the coating on the self-sealing strip is thinner, the two push rods 522 move forward synchronously, so that the roller body 512 approaches the self-sealing strip, and more water-based coating is coated on the self-sealing strip, thereby increasing the thickness of the coating on the self-sealing strip; when the coating detection mechanism 800 detects that the coating on the seal is thick on one side and thin on the other side, the push rod 522 corresponding to the thinner side of the coating moves forwards independently, the angle of the roller body 512 is adjusted, and the coating thickness on the side is increased.
As shown in fig. 2 and 3, the floating support 520 further includes a plurality of positioning pulleys 523, wherein the plurality of positioning pulleys 523 are rotatably disposed on the base 521, the plurality of positioning pulleys 523 are tangential to the roller 512, and the plurality of positioning pulleys 523 are used for ensuring the rotation stability of the roller 512. The positioning pulley 523 makes the rotation of the roller 512 more temperature, and prevents the roller 512 from shaking during rotation, which results in uneven water coating of the self-sealing strip.
In some embodiments of the present invention, the applicator roll 510 is made of a stainless steel material. Stainless steel is selected as the material of the coating roller 510 to ensure that the surface thereof does not adsorb or absorb the coating. In addition, stainless steel can reduce temperature variation during coating, thereby improving uniformity.
In some embodiments of the invention, the paint delivery pump is a gear oil pump, a pneumatic diaphragm pump, or a screw pump.
In some embodiments of the present invention, the diameter of the coating through holes 511 is 0.5mm to 1mm, and the pitch of the adjacent coating through holes 511 is 1mm to 2mm. A suitable diameter and spacing ensures a uniform distribution of the coating on the roller surface.
As shown in fig. 1, the device further includes a plurality of tensioning rollers 900, where the plurality of tensioning rollers 900 are respectively disposed between the pressing mechanism 400 and the coating mechanism 500, and between the drying mechanism 600 and the winding mechanism 700. The tensioning roller 900 can ensure that the self-sealing strip is fully attached to the coating roller 510, and further improves the quality of the water-based paint coating.
As shown in fig. 1, the extrusion mechanism 200 includes a screw extruder 210, a feed end of the screw extruder 210 is provided with a feed head 220, a discharge end of the screw extruder 210 is provided with an extrusion die 230, and the screw extruder 210 is in transmission connection with a screw driver 240.
As shown in fig. 1, the cooling mechanism 300 includes a cold air box 310, the cold air box 310 is a hollow box body, one end of the cold air box 310 is connected with the extrusion die 230, the other end of the cold air box 310 is connected with the pressing mechanism 400, a self-sealing strip male chain and a self-sealing strip female chain formed in the extrusion die 230 pass through the cold air box 310 to reach the pressing mechanism 400, and the cold air box 310 is communicated with a blowing piece 320.
In sum, the self-sealing strip is extruded and shaped, and then the water-based paint is used for continuous coating, so that the self-sealing strip has the heat sealing or bonding performance, and the technical problems that most of the self-sealing strip materials in the prior art do not have the heat sealing and bonding performance and cannot be subjected to heat sealing molding and firm bonding with widely used paper-based bags are solved.
The self-sealing strip production method of the embodiment of the invention comprises the following steps:
step 1: putting plastic raw materials into an extrusion mechanism 200, and operating the extrusion mechanism 200 to output a self-sealing strip male chain with protrusions and a self-sealing strip female chain with grooves;
step 2: the self-sealing strip male chain and the self-sealing strip female chain pass through the cold air box 310 to be cooled and shaped, and the cooled self-sealing strip male chain and the cooled self-sealing strip female chain are pressed by the pressing mechanism 400 to form a complete self-sealing strip;
step 3: the self-sealing strip passes through the space between the two coating rollers 510, and the coating rollers 510 are used for coating the water-based paint on the two sides of the self-sealing strip; the coating weight of the water-based paint is 0.5-3.5g/m < 2 >, and the coating speed is 200-400m/min.
Step 4: the self-sealing strip with the water-based paint coated on the two sides is dried by the drying mechanism 600; a hot air inlet type drying device is adopted, a high-wind-force air suction and exhaust system is arranged in the drying device, the drying temperature is 80-130 ℃, and the drying time is 2-12s.
Step 5: the rolling mechanism 700 rolls the dried self-sealing tape.
In some embodiments of the invention, the plastic material is PLA, PE, PP, PVC, TPU or PGA.
In some embodiments of the invention, the aqueous coating is one or more of an ethylene acrylic acid copolymer, an acrylate polymer, a styrene/acrylate copolymer.
The following describes the present self-sealing tape production method with three application examples and their comparative application examples:
application example 1
Putting plastic raw materials into an extrusion mechanism 200, and operating the extrusion mechanism 200 to output a self-sealing strip male chain with protrusions and a self-sealing strip female chain with grooves; the self-sealing strip male chain and the self-sealing strip female chain pass through the cold air box 310 to be cooled and shaped, and the cooled self-sealing strip male chain and the cooled self-sealing strip female chain are pressed by the pressing mechanism 400 to form a complete self-sealing strip; the self-sealing strip passes through the space between the two coating rollers 510, and the coating rollers 510 are used for coating the water-based paint on the two sides of the self-sealing strip; the coating weight of the aqueous coating was 3g/m2 and the coating speed was 300m/min. The self-sealing strip with the water-based paint coated on the two sides is dried by the drying mechanism 600; a hot air inlet type drying device is adopted, a high-wind power air suction and exhaust system is arranged in the drying device, and the drying temperature is 120 ℃. The rolling mechanism 700 rolls the dried self-sealing tape.
The same aqueous coating was applied to the surface of white paper with a coating weight of 1.5g/m2. The self-seal was heat sealed to the white kraft paper using a heat sealing machine. The heat-sealing temperature is 130 ℃, the heat-sealing pressure is 0.2MPa, and the heat-sealing time is 0.2s. After cooling, the paper strips were cut into strips 15mm wide, and heat seal strength was measured on a tensile tester, for specific operation, reference QB/T2358-98.
Application example 2
Putting plastic raw materials into an extrusion mechanism 200, and operating the extrusion mechanism 200 to output a self-sealing strip male chain with protrusions and a self-sealing strip female chain with grooves; the self-sealing strip male chain and the self-sealing strip female chain pass through the cold air box 310 to be cooled and shaped, and the cooled self-sealing strip male chain and the cooled self-sealing strip female chain are pressed by the pressing mechanism 400 to form a complete self-sealing strip; the self-sealing strip passes through the space between the two coating rollers 510, and the coating rollers 510 are used for coating the water-based paint on the two sides of the self-sealing strip; the coating amount of the aqueous coating material was 1.5g/m2, and the coating speed was 300m/min. The self-sealing strip with the water-based paint coated on the two sides is dried by the drying mechanism 600; a hot air inlet type drying device is adopted, a high-wind power air suction and exhaust system is arranged in the drying device, and the drying temperature is 100 ℃. The rolling mechanism 700 rolls the dried self-sealing tape.
The same aqueous coating was applied to the surface of white paper with a coating weight of 1.5g/m2. The self-seal was heat sealed to the white kraft paper using a heat sealing machine. The heat-sealing temperature is 130 ℃, the heat-sealing pressure is 0.2MPa, and the heat-sealing time is 0.2s. After cooling, the paper strips were cut into strips 15mm wide, and heat seal strength was measured on a tensile tester, for specific operation, reference QB/T2358-98.
Application example 3
Putting plastic raw materials into an extrusion mechanism 200, and operating the extrusion mechanism 200 to output a self-sealing strip male chain with protrusions and a self-sealing strip female chain with grooves; the self-sealing strip male chain and the self-sealing strip female chain pass through the cold air box 310 to be cooled and shaped, and the cooled self-sealing strip male chain and the cooled self-sealing strip female chain are pressed by the pressing mechanism 400 to form a complete self-sealing strip; the self-sealing strip passes through the space between the two coating rollers 510, and the coating rollers 510 are used for coating the water-based paint on the two sides of the self-sealing strip; the coating amount of the aqueous coating material was 0g/m2, and the coating speed was 300m/min. The self-sealing strip with the water-based paint coated on the two sides is dried by the drying mechanism 600; a hot air inlet type drying device is adopted, a high-wind power air suction and exhaust system is arranged in the drying device, and the drying temperature is 80 ℃. The rolling mechanism 700 rolls the dried self-sealing tape.
The same aqueous coating was applied to the surface of white paper with a coating weight of 1.5g/m2. The self-seal was heat sealed to the white kraft paper using a heat sealing machine. The heat-sealing temperature is 130 ℃, the heat-sealing pressure is 0.2MPa, and the heat-sealing time is 0.2s. After cooling, the paper strips were cut into strips 15mm wide, and heat seal strength was measured on a tensile tester, for specific operation, reference QB/T2358-98.
Comparative application examples 1, 2, 3 were different from application examples 1, 2, 3 in that the coating amount of the aqueous coating on the surface of the white paper heat-sealed with the self-sealing tape was 3.0g/m2.
The test results of each application example and comparative application example are as follows:
the above results show that the present invention provides a self-sealing strip production apparatus and method, which can satisfy sagging property and thixotropic property of single or multiple aqueous coating materials by using the coating roller 510 and the matching device, improve coating uniformity of the self-sealing strip, and heat-seal or bond the self-sealing strip material with the existing widely used paper-based bag body no matter whether the self-sealing strip material has heat-sealing property or not. When in use, the coating amount of the surface of the paper-based bag body can be reduced, and the self-sealing strip and the paper-based material can be bonded by hot pressing under the condition of low coating amount, and the heat sealing strength is not lower than 3.5N/15mm.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present invention.
Claims (18)
1. A self-sealing strip production device, comprising:
a frame (100);
the extrusion mechanism (200) is arranged on the frame (100), and the extrusion mechanism (200) is used for extruding plastic raw materials to form a self-sealing strip male chain with a protrusion and a self-sealing strip female chain with a groove;
-a cooling mechanism (300), said cooling mechanism (300) being provided on said frame (100), said cooling mechanism (300) being adapted to cool a self-sealing strip male chain and a self-sealing strip female chain extruded from said extrusion mechanism (200);
the pressing mechanism (400) is arranged on the frame (100), and the pressing mechanism (400) is used for pressing the cooled self-sealing strip male chain and the cooled self-sealing strip female chain to form a complete self-sealing strip;
the coating mechanism (500), coating mechanism (500) is arranged on frame (100), coating mechanism (500) are used for carrying out the coating of aqueous coating to the both sides of self-sealing strip, coating mechanism (500) include two coating roller (510), two coating roller (510) are located respectively from the both sides of strip, coating roller (510) are through pipeline and coating storehouse intercommunication, are provided with the coating delivery pump on the pipeline, coating roller (510) are the cavity cylindric, have a plurality of coating through-holes (511) along coating roller (510) circumference equipartition;
the drying mechanism (600) is arranged on the frame (100), and the drying mechanism (600) is used for drying the water-based paint on two sides of the self-sealing strip;
the winding mechanism (700), winding mechanism (700) are arranged on the frame (100), and winding mechanism (700) is used for winding the dried self-sealing strip.
2. The self-sealing strip production device according to claim 1, further comprising a coating detection mechanism (800), wherein the coating detection mechanism (800) is arranged between the coating mechanism (500) and the drying mechanism (600), and the coating detection mechanism (800) is used for detecting the uniformity and the integrity of the coating of the water-based paint on both sides of the self-sealing strip.
3. The self-sealing strip production device according to claim 2, wherein the coating roller (510) comprises:
the coating device comprises a roller body (512), wherein the roller body (512) is hollow cylindrical, and the coating through holes (511) are uniformly distributed on the side wall surface of the roller body (512) along the circumferential direction of the roller body (512);
conveying pipeline (513), conveying pipeline (513) are worn to establish along the axle center of roll body (512) in roll body (512), conveying pipeline (513) with be connected through bearing (514) between roll body (512), conveying pipeline (513) both ends all are provided with connecting mouth (515), conveying pipeline (513) are passed through connecting mouth (515) and conveying pipeline intercommunication, aqueous coating passes through conveying pipeline (513) input to in roll body (512), and pass through the rotation coating of roll body (512) is from the seal outside.
4. A self-sealing strip production device according to claim 3, wherein a temperature measuring member (516) and a heat exchanging member (517) are arranged on the inner side of the roller body (512), the temperature measuring member (516) is used for detecting the temperature of the paint in the roller body (512), and the heat exchanging member (517) is used for heating and cooling according to the temperature detected by the temperature measuring member (516), so that the paint in the roller body (512) keeps good fluidity and is coated on the self-sealing strip under the proper temperature condition.
5. The self-sealing strip production device according to claim 4, wherein the coating mechanism (500) further comprises a floating support (520), the floating support (520) is movably arranged on the frame (100), the coating roller (510) is rotatably arranged on the floating support (520), and the distance and the angle of the coating roller (510) relative to the self-sealing strip are adjusted through the floating support (520).
6. The self-sealing strip production device according to claim 5, wherein said floating support (520) comprises:
-a base (521), said base (521) being connected to said feed duct (513);
the two push rods (522) are arranged on the frame (100) in a back-and-forth movement mode, the two push rods (522) are respectively connected with the left end and the right end of the base (521) in a rotatable mode, the distance between the coating roller (510) and the self-sealing strip can be adjusted by controlling the two push rods (522) to synchronously move back and forth, and the angle of the coating roller (510) relative to the self-sealing strip can be adjusted by independently controlling the back-and-forth movement of one push rod (522).
7. The self-sealing strip production device according to claim 6, wherein the floating support (520) further comprises a plurality of positioning pulleys (523), the positioning pulleys (523) are rotatably arranged on the base (521), the positioning pulleys (523) are tangential to the roller body (512), and the positioning pulleys (523) are used for guaranteeing the rotation stability of the roller body (512).
8. The self-sealing strip production device according to claim 7, characterized in that the coating roller (510) is made of stainless steel material.
9. The self-sealing strip production device according to claim 8, wherein the paint delivery pump is a gear oil pump, a pneumatic diaphragm pump or a screw pump.
10. The self-sealing strip production device according to claim 9, wherein the diameter of the coating through holes (511) is 0.5-1 mm, and the distance between adjacent coating through holes (511) is 1-2 mm.
11. The self-sealing strip production device according to claim 10, further comprising a plurality of tensioning rollers (900), wherein a plurality of tensioning rollers (900) are respectively arranged between the pressing mechanism (400) and the coating mechanism (500) and between the drying mechanism (600) and the winding mechanism (700).
12. The self-sealing strip production device according to claim 11, wherein the extrusion mechanism (200) comprises a screw extruder (210), a feed end of the screw extruder (210) is provided with a feed head (220), a discharge end of the screw extruder (210) is provided with an extrusion die (230), and the screw extruder (210) is in transmission connection with a screw driver (240).
13. The self-sealing strip production device according to claim 12, wherein the cooling mechanism (300) comprises a cold air box (310), the cold air box (310) is a hollow box body, one end of the cold air box (310) is connected with the extrusion die (230), the other end of the cold air box (310) is connected with the pressing mechanism (400), and a self-sealing strip male chain and a self-sealing strip female chain formed in the extrusion die (230) penetrate through the cold air box (310) to reach the pressing mechanism (400), and the cold air box (310) is communicated with a blowing piece (320).
14. A method of producing a self-sealing strip using the self-sealing strip production apparatus of claim 13, the method comprising:
step 1: putting plastic raw materials into the extrusion mechanism (200), and operating and outputting a self-sealing strip male chain with a bulge and a self-sealing strip female chain with a groove by the extrusion mechanism (200);
step 2: the self-sealing strip male chain and the self-sealing strip female chain pass through the cold air box (310) for cooling and shaping, and the cooled self-sealing strip male chain and the cooled self-sealing strip female chain are pressed by the pressing mechanism (400) to form a complete self-sealing strip;
step 3: the self-sealing strip passes through the space between the two coating rollers (510), and the coating rollers (510) are used for coating water-based paint on two sides of the self-sealing strip;
step 4: the self-sealing strip with the water-based paint coated on the two sides is used for drying the water-based paint on the two sides of the self-sealing strip through the drying mechanism (600);
step 5: the winding mechanism (700) winds the dried self-sealing strip.
15. The method of producing a self-sealing tape according to claim 14, wherein in the step 3, the coating amount of the aqueous coating material is 0.5 to 3.5g/m2 and the coating speed is 200 to 400m/min.
16. The method of claim 14, wherein in step 4, a hot air inlet type drying device is used, a high-wind air suction and exhaust system is arranged in the device, the drying temperature is 80-130 ℃, and the drying time is 2-12s.
17. The method of claim 14, wherein the plastic material is PLA, PE, PP, PVC, TPU or PGA.
18. The method of claim 14, wherein the aqueous coating is one or more of an ethylene acrylic acid copolymer, an acrylate polymer, and a styrene/acrylate copolymer.
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