CN112427260B - Moisture curing polyurethane hot melt adhesive storage tank, anti-sticking adhesive applicator and adhesive coating method - Google Patents
Moisture curing polyurethane hot melt adhesive storage tank, anti-sticking adhesive applicator and adhesive coating method Download PDFInfo
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- CN112427260B CN112427260B CN202011369844.5A CN202011369844A CN112427260B CN 112427260 B CN112427260 B CN 112427260B CN 202011369844 A CN202011369844 A CN 202011369844A CN 112427260 B CN112427260 B CN 112427260B
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- Prior art keywords
- glue
- scraper
- coating roller
- gluing
- adhesive
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- 238000000576 coating method Methods 0.000 title claims abstract description 120
- 239000004831 Hot glue Substances 0.000 title claims abstract description 49
- 229920002635 polyurethane Polymers 0.000 title claims abstract description 47
- 239000004814 polyurethane Substances 0.000 title claims abstract description 47
- 238000003860 storage Methods 0.000 title claims abstract description 27
- 238000013008 moisture curing Methods 0.000 title claims abstract description 19
- 239000000853 adhesive Substances 0.000 title claims abstract description 17
- 230000001070 adhesive effect Effects 0.000 title claims abstract description 17
- 239000003292 glue Substances 0.000 claims abstract description 154
- 239000011248 coating agent Substances 0.000 claims abstract description 114
- 230000007246 mechanism Effects 0.000 claims abstract description 91
- 238000004026 adhesive bonding Methods 0.000 claims abstract description 62
- 230000000181 anti-adherent effect Effects 0.000 claims abstract description 54
- 239000000463 material Substances 0.000 claims abstract description 36
- 238000003825 pressing Methods 0.000 claims abstract description 24
- 238000007789 sealing Methods 0.000 claims abstract description 21
- 238000002347 injection Methods 0.000 claims abstract description 19
- 239000007924 injection Substances 0.000 claims abstract description 19
- 239000007788 liquid Substances 0.000 claims abstract description 7
- 239000004809 Teflon Substances 0.000 claims description 9
- 229920006362 Teflon® Polymers 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 238000003892 spreading Methods 0.000 claims description 9
- 230000007480 spreading Effects 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 7
- 239000010410 layer Substances 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 6
- 230000009467 reduction Effects 0.000 claims description 4
- 239000002344 surface layer Substances 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 13
- 229910052757 nitrogen Inorganic materials 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 238000001125 extrusion Methods 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 238000001723 curing Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000010073 coating (rubber) Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- -1 isocyanate compound Chemical class 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 210000003437 trachea Anatomy 0.000 description 2
- 229920001730 Moisture cure polyurethane Polymers 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009924 canning Methods 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
- B05C11/1042—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material provided with means for heating or cooling the liquid or other fluent material in the supplying means upstream of the applying apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
- B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
- B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
- B05C1/0808—Details thereof, e.g. surface characteristics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
- B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
- B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
- B05C1/0817—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line characterised by means for removing partially liquid or other fluent material from the roller, e.g. scrapers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/11—Vats or other containers for liquids or other fluent materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C13/00—Means for manipulating or holding work, e.g. for separate articles
Landscapes
- Coating Apparatus (AREA)
Abstract
The invention discloses a moisture curing polyurethane hot melt adhesive storage tank, a cleaning-free anti-sticking adhesive coating machine and an adhesive coating method. The glue preheating mechanism is utilized to heat the glue into a liquid state, and when the glue on the glue injection mechanism is used up, the preheated glue can be quickly and directly replaced, so that continuous glue coating operation is ensured. The gluing mechanism and the gluing pressing mechanism are matched to coat glue on materials, and the gluing quantity and thickness adjusting mechanism can adjust the gluing quantity and thickness. In particular, the anti-adhesive coating roller, the first scraper, the second scraper and all sealing elements adopt high-temperature-resistant anti-adhesive materials, and the glue is not adhered to the surface after being solidified, so that the problems that the glue is adhered to the surface after being stopped, is not easy to fall off and is difficult to clean are avoided.
Description
Technical Field
The invention relates to the technical field of glue spreading machines, in particular to a moisture curing polyurethane hot melt adhesive anti-sticking glue spreading machine.
Background
Moisture-curable polyurethane hot melt adhesives (hereinafter referred to as glues) are a type of high performance hot melt adhesive products in great use today. The main component of the hot melt adhesive is isocyanate-terminated polyurethane prepolymer formed by reacting polyester or polyether glycol with isocyanate compound. The prepolymer has thermal fluidity, is coated on the surface of an adherend after heating, and is crosslinked and solidified by means of moisture in the air to form adhesion.
Since the moisture-curable polyurethane hot melt adhesive is protected from contact with air before coating, the coating process requires the aid of an air-insulated coater. The using process of the existing glue spreader is as follows: firstly, cutting off the bag of the moisture curing polyurethane hot melt adhesive in the sealed bag, then putting the bag into a heating chamber of a gluing machine, firstly vacuumizing the heating chamber, then filling nitrogen, and isolating air by the actions of vacuumizing and filling nitrogen so as to prevent the moisture curing polyurethane hot melt adhesive from contacting with moisture in the air. And spraying the coating water onto the object to be glued by using a glue spreader or a spray gun to finish the gluing operation.
The existing gumming machine is complex in structure, needs to be equipped with a vacuumizing machine, a nitrogen charging machine and the like, and is large in size, heavy, difficult to move, inconvenient to use and high in manufacturing cost.
Disclosure of Invention
In view of the above, the present invention aims at overcoming the disadvantages of the prior art, and its main object is to provide a moisture curing polyurethane hot melt adhesive anti-sticking glue applicator which has simple structure, small volume and low cost, thereby overcoming the disadvantages of the prior art.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the anti-sticking adhesive machine for moisture cured polyurethane hot melt adhesive comprises a frame provided with
The storage tank opening mechanism is provided with a threaded opening corresponding to the storage tank opening, a triangular bayonet is fixed in the middle of the threaded opening and pushed by a tank opening cylinder, the storage tank opening is fixed by internal and external threads, and a tank opening cylinder switch is opened to push out the triangular bayonet so as to pierce the storage tank opening;
The glue preheating mechanism is arranged at a preheating station of the machine and is provided with a preheating container for heating glue to be used;
the glue injection mechanism is provided with a pressing type extruder, the pressing type extruder is provided with a heater, the pressing type extruder is connected with a rotary cylinder through a connecting rod, and the rotary cylinder drives the extruder to move to a preheating station or a glue injection station;
The glue coating mechanism is arranged below the glue injection mechanism and comprises an anti-adhesive coating roller, anti-adhesive first scrapers and second scrapers which are positioned on two sides of the anti-adhesive coating roller, the anti-adhesive coating roller is driven by a reduction gearbox driven by a motor, the first scrapers are driven by a first driver, the second scrapers are driven by a second driver, and when coating is carried out, the first scrapers and the second scrapers are respectively driven by the first driver and the second driver to be attached to the surface of the anti-adhesive coating roller;
and the gluing and compacting mechanism is arranged below the gluing mechanism and is used for bearing and dragging the coated material and propping the coated material against the anti-sticking glue coating roller.
A gluing method comprises the following steps
Step 1, placing a sealed canned moisture-curing polyurethane hot melt adhesive into a preheating container, wherein the moisture-curing polyurethane hot melt adhesive is changed from a solid state to a liquid state;
Step 2, opening a storage tank opening by using a storage tank opening mechanism, and mounting the anti-overflow glue outlet nozzle at the storage tank opening; pulling the preheated canned moisture-curable polyurethane hot melt adhesive open the top sealing cover, exposing the inner layer piston cover, putting the sealing cover into the extruder, and introducing positive pressure into the extruder, wherein the positive pressure can extrude the inner layer piston cover to push the piston cover so that the moisture-curable polyurethane hot melt adhesive is extruded from the adhesive outlet;
Step 3, the moisture cured polyurethane hot melt adhesive flows onto an anti-adhesive coating roller, the anti-adhesive coating roller rolls, and then the scraper is used for uniformly distributing the adhesive on the anti-adhesive coating roller;
And 4, moving the gluing and compacting mechanism to the lower part of the gluing mechanism, so that a channel for gluing materials is formed between the anti-gluing coating roller and the compacting roller, when the materials enter the anti-gluing coating roller from the channel, under the power traction of the anti-gluing coating roller, the materials move on one side and are coated with glue on the surface contacted with the anti-gluing coating roller, and meanwhile, the compacting roller always pushes the materials to the anti-gluing coating roller, so that the materials are contacted with the anti-gluing coating roller as much as possible, and the glue coating is completed after the materials are sent out.
The utility model provides a holding vessel of moisture curing polyurethane hot melt adhesive, includes a jar body, and there is anti-overflow to leak out the gluey head bottom of this jar body, and the top of this jar body is the opening, and the opening seals and is provided with a sealed lid in top, is equipped with the piston lid in this jar body, and the piston lid is divided into two with the inner space of jar body, and the part that is used for storing moisture curing polyurethane hot melt adhesive towards out the gluey head is sealed the gluey chamber, and the part that is towards the piston lid is the cavity.
Compared with the prior art, the invention has obvious advantages and beneficial effects, and in particular, the technical scheme can be as follows:
The first one, a moisture curing polyurethane hot melt adhesive antiseized spreading machine, including holding vessel mouth opening mechanism, glue preheating mechanism, glue injection mechanism, rubber coating mechanism, rubberizing volume thickness adjustment mechanism, rubber coating hold-down mechanism. The glue is solid when not used, the glue can be heated to be liquid by the glue preheating mechanism, so that the glue injection mechanism is ready for use, and when the glue on the glue injection mechanism is used up, the tank opening of the glue tank can be opened by the storage tank opening mechanism, so that the preheated glue can be quickly and directly filled into the glue injection mechanism, and continuous gluing operation is ensured. The gluing mechanism and the gluing pressing mechanism are matched to coat glue on materials, and the materials can be plastic, paper, board and the like. The thickness and uniformity of the glue can be controlled by designing the glue thickness adjusting mechanism, and particularly, the anti-glue-sticking coating roller, the first scraper and the second scraper adopt high-temperature-resistant anti-sticking materials, and the glue is not stuck on the surface after being solidified, so that the problems that the glue is attached on the surface after being stopped, is not easy to fall off and is difficult to clean are avoided. Besides, the machine omits a vacuumizing device and a nitrogen charging device, thereby having simple structure, small volume and low manufacturing cost.
Secondly, according to the gluing method, based on the moisture curing polyurethane hot melt adhesive anti-sticking gluing machine disclosed by the invention, the steps of vacuumizing and filling nitrogen can be omitted, and the glue can not be directly contacted with air in the whole gluing process, so that curing is prevented.
Thirdly, a storage tank of moisture curing polyurethane hot melt adhesive utilizes the piston lid to keep apart glue and air, prevents to contact air and solidifies, even the disposable not used of glue finishes, also can continue to use next time, avoids extravagant. In addition, the design of piston lid still makes this kind of holding vessel can utilize atmospheric pressure to extrude glue, convenient operation.
In order to more clearly illustrate the structural features and efficacy of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and examples.
Drawings
FIG. 1 is a schematic view of a dispenser according to an embodiment of the present invention.
Fig. 2 is a schematic view of a glue injection mechanism according to an embodiment of the invention in a stop state.
Fig. 3 is a schematic view of the glue hold-down mechanism in a stopped state according to an embodiment of the present invention.
FIG. 4 is a schematic view of a tank opening mechanism according to an embodiment of the present invention.
Fig. 5 is a schematic view of a glue application mechanism according to an embodiment of the invention.
Fig. 6 is an exploded view of fig. 5.
Fig. 7 is an enlarged schematic view of the first glue thickness adjusting mechanism in fig. 5.
Fig. 8 is a schematic view of two doctor blades in a rubberized state of an anti-stiction coating roll according to an embodiment of the invention.
FIG. 9 is a schematic view of two doctor blades in a shutdown state of an anti-stiction coating roller according to an embodiment of the invention.
Fig. 10 is a schematic view of a glue hold down mechanism according to an embodiment of the invention.
Fig. 11 is an exploded view of fig. 10.
FIG. 12 is a schematic of a reservoir for moisture curable polyurethane hot melt adhesive in accordance with an embodiment of the present invention.
FIG. 13 is a cross-sectional view of a reservoir of moisture-curable polyurethane hot melt adhesive in accordance with an embodiment of the present invention.
The attached drawings are used for identifying and describing:
10. Frame 11, vertical support plate
20. Glue preheating mechanism 21 and preheating container
22. Connecting seat 30 and glue injection mechanism
31. Extruder 311, flip cover
312. Glue outlet 313 and air tube
32. Connecting rod 33, rotary cylinder
40. Glue spreading mechanism 41 and coating tool sealing box
411. Inlet hole 42, anti-sticking coating roller
421. Motor 422 and reduction gearbox
423. Heating wire 424 and teflon
425. Fine grain 43, first scraper
431. First driver 432, first tool holder
433. First glue thickness adjusting mechanism 4331 and fine adjustment head
4332. Adjusting seat 4333 and triangular sliding block
4334. Swing arm 44, second scraper
441. Second driver 442, second tool apron
443. Second gluing thickness adjusting mechanism 50 and gluing compacting mechanism
51. Guide seat 52 and sliding block
53. Base 54, movable seat
55. Pinch roller 56, spring
60. Storage tank 61 and tank body
62. Glue outlet head 63 and top sealing cover
64. Piston cap 65 and sealant chamber
66. Cavity 70, storage tank opening mechanism
71. Screw thread mouth 72, triangular bayonet
73. And (5) opening a cylinder.
Detailed Description
Referring to fig. 1 to 11, a specific structure of a preferred embodiment of the present invention is shown, which is a moisture-curable polyurethane hot-melt adhesive anti-sticking machine for applying adhesive to articles (such as midsole, cloth, paper, board, metal parts, etc.) requiring adhesive.
The structure of the moisture curing polyurethane hot melt adhesive anti-sticking glue applicator comprises a frame 10, wherein the frame 10 is provided with a glue preheating mechanism 20, a glue injection mechanism 30, a glue applying mechanism 40, a glue applying compacting mechanism 50 and a storage tank opening mechanism 70.
The frame 10 is placed on a working platform, so that the height of each mechanism is convenient for personnel to carry out gluing operation, the frame 10 can be supported on the ground by the support legs, and the lockable pulleys are also preferably arranged on the support legs, so that the moving and carrying of the gluing machine are convenient.
As shown in fig. 4, the tank opening mechanism 70 is provided with a threaded opening 71 corresponding to the tank opening, an internal and external screw thread for matching with the tank opening is provided on the threaded opening 71, a triangular bayonet 72 is fixed in the middle of the threaded opening, the triangular bayonet is pushed by a tank opening cylinder, the tank opening is fixed by the internal and external screw thread, and the tank opening cylinder 73 is opened to open and close, so that the triangular bayonet can be pushed out to pierce the tank opening.
The glue preheating mechanism 20 is arranged at a preheating station of the machine, and the glue preheating mechanism 20 is provided with a preheating container 21 for heating glue to be used. In this embodiment, the glue preheating mechanism 20 has a connection seat 22, a preheating container 21 is disposed on the connection seat 22, the preheating container 21 is cylindrical, and a heater, for example, a sheet-shaped heater or a heating wire, is disposed on the preheating container 21. Since the moisture-curable polyurethane hot melt adhesive is solid before use, it is put into the preheating vessel 21 and then heated to be liquid. The process of completely changing the moisture-curing polyurethane hot melt adhesive from solid state to liquid state is time-consuming, so that the glue preheating mechanism 20 is designed to enable the glue to be slowly melted in the preheating container 21, and when the glue on the glue injection mechanism 30 is used up, the glue can be taken out from the glue preheating mechanism 20 at any time to be supplied to the glue injection mechanism 30, so that continuous operation of the machine is ensured.
The glue injection mechanism 30 has a pressing extruder 31, and a heater is disposed on the extruder 31, the pressing extruder 31 is connected to a rotary cylinder 33 through a connecting rod 32, and the rotary cylinder 33 drives the extruder 31 to move to a preheating station or a glue injection station.
Inside the extruder 31 is a cavity for placing the canned glue, the cavity is of a sealing structure, and is provided with a flip 311, and the whole can of the canned glue can be placed into the cavity by opening the flip 311. The lower extreme of cavity has a glue outlet 312, and the upper end of colloid is connected trachea 313, and trachea 313 connects the press, when letting in the air (here only need let in the air can, need not let in nitrogen gas) to the cavity, then positive pressure can extrude the piston lid 64 of canning glue to extrude glue. And because the glue is isolated by the piston cover 64 and does not contact the air creating positive pressure, no nitrogen is required during extrusion and no glue curing problems occur.
The extruder 31 is directly above the glue station when the glue application operation is performed, and the extruder 31 is rotated directly above the preheating vessel 21 when the operation is stopped or the glue storage tank is replaced. Specifically, the rotary cylinder 33 performs two functions, namely, the first step of raising and lowering the driving link 32 and the second step of rotating the driving link 32. The whole action process is as follows: in the initial state, the extruder 31 is located right above the preheating station, when the operation is needed, the rotary cylinder 33 ventilates to drive the connecting rod 32 to rise, then drives the connecting rod 32 to rotate, and when the glue injection station is reached, the connecting rod 32 descends, so that the glue outlet 312 of the extruder 31 is just aligned with the inlet hole 411 on the coating tool sealing box 41, the glue is ensured to flow into the coating tool sealing box 41, and pollution and waste caused by the glue flowing to the outside are avoided.
The glue spreading mechanism 40 is disposed below the glue injecting mechanism 30, and includes a glue-preventing coating roller 42, a glue-preventing first scraper 43 and a second scraper 44 disposed on two sides of the glue-preventing coating roller 42. The anti-adhesive coating roller 42 is driven by a motor 421 to drive a reduction gearbox 422, and the anti-adhesive coating roller 42 is used for contacting the surface of a product and simultaneously coating adhesive. The first scraper 43 is driven by a first driver 431 and the second scraper 44 is driven by a second driver 441. When coating is performed, the first doctor blade 43 and the second doctor blade 44 are respectively driven by the first driver 431 and the second driver 441 to be attached to the surface of the anti-adhesive coating roller 42 (see fig. 8). The first scraper 43 and the second scraper 44 are used for scraping and leveling excessive glue on the anti-adhesive coating roller, so that the glue is homogenized on the anti-adhesive coating roller. When the operation is stopped, the first blade 43 and the second blade 44 are rotated and then no longer contact the anti-adhesive coating roller (as shown in fig. 9).
The glue spreading and pressing mechanism 50 is disposed below the glue spreading mechanism 40, and is used for supporting the coated material and pressing the coated material against the anti-adhesive coating roller 42, so that the glued material contacts the anti-adhesive coating roller as much as possible, and the surface of the material can be coated with glue, thereby preventing the unstable adhesion and degumming problems caused by uneven glue coating.
And, the center of the anti-adhesive coating roller 42 is further provided with a heating wire 423 in a penetrating way, so that the whole anti-adhesive coating roller is heated, and the glue coating process is ensured not to be solidified due to contacting common air.
The surface of the anti-sticking coating roller 42 is sprayed with teflon 424 to form an anti-sticking surface layer on the surface. The traditional anti-adhesive coating roller is a metal cylinder body or high-temperature resistant plastic. The surface of the anti-adhesive coating roller also has fine grains 425, and the fine grains 425 are staggered to form countless small pits, and the small pits are penetrated by glue, so that the glue is transferred to the material when the glue contacts the coated material. The surface of the anti-adhesive coating roll is not suitable to be smooth because the surface which is too smooth has anti-fog property (hydrophobicity), and the glue is not uniformly attached on a smooth plane, so that the glue cannot be uniformly coated on the surface of a material, and the anti-adhesive coating roll with smooth inner eyes and countless small pits is required. The teflon 424 is sprayed on the anti-adhesive coating roller, and as the teflon 424 material has anti-adhesive property, even if the glue solidifies in small pits on the anti-adhesive coating roller after the gluing operation is stopped, the residual glue can be dropped after being lightly smeared. The first scraper 43 and the second scraper 44 can be used for gently scraping after the machine is started, so that the anti-sticking cleaning-free effect is realized.
In addition, in order to further obtain a better anti-sticking effect, the first doctor blade 43 and the second doctor blade 44 are teflon anti-sticking doctor blades. Thus, three components in direct contact with the glue: the anti-adhesive coating roller, the first scraper 43 and the second scraper 44 are all anti-adhesive, so that the problem that adhesion is caused by curing of the adhesive after shutdown and a large amount of time is required for cleaning is completely avoided. The invention has no glue coating groove, the coating tool sealing box 41 is arranged above the three parts of the anti-adhesive coating roller, the first scraper 43 and the second scraper 44, and the main functions of the coating tool sealing box 41 are dust prevention and sputtering which can be generated in the glue coating process and external pollution prevention. The space can be prevented from being directly contacted before glue is applied. However, the coating tool sealing box 41 does not serve as a glue groove because the coating tool sealing box 41 is located above the anti-adhesive coating roller, not below, and a large amount of glue is not stored inside the coating tool sealing box 41. The glue extruded by the extruder 31 is directly flowed onto the anti-adhesive coating roller, and the extrusion pressure can be controlled so that the current extrusion flow speed and quantity are not suitable for overflowing caused by the condition that excessive glue is not used up in one-time extrusion.
The first doctor blade 43 is mounted on the first blade holder 432, the second doctor blade 44 is mounted on the second blade holder 442, the first blade holder 432 and the second blade holder 442 are made of metal materials, and the teflon 424 is sprayed on the surface to form an anti-sticking surface layer on the surface. The device that constitutes the glue hold-down mechanism 50 that may come into contact with the glue is thus also anti-adhesive, facilitating subsequent quick cleaning.
The first driver 431 for driving the first doctor blade 43 is a first cylinder, the second driver 441 for driving the second doctor blade 44 is a second cylinder, the first doctor blade 43 is further provided with a first paste amount thickness adjusting mechanism 433, and the second doctor blade 44 is provided with a second paste amount thickness adjusting mechanism 443. The first glue thickness adjusting mechanism 433 and the second glue thickness adjusting mechanism 443 can control the swing angles of the first scraper 43 and the second scraper 44, and are used for clutching the gaps between the first scraper, the second scraper and the anti-adhesive coating roller, so as to adjust the thickness and uniformity of the glue on the anti-adhesive coating roller. The structure of the device comprises a fine adjustment head 4331 with a micrometer, an adjustment seat 4332, a triangular sliding block 4333 and a swinging arm 4334. The adjusting seat 4332 is fixed on the vertical supporting plate 11 of the frame 10, the sliding block 52 is movably installed on the adjusting seat 4332, the fine adjusting head 4331 passes through the adjusting seat 4332 and then is connected with the sliding block 52, the sliding block 52 is contacted with the swinging arm 4334 by the slope of the sliding block 52, the swinging arm 4334 is installed on the transmission shaft of the first scraper/the second scraper, and when the fine adjusting head 4331 is fine-adjusted, the swinging arm 4334 slides on the slope of the triangular sliding block, so as to control the rotation of the transmission shaft of the first tool apron 432 and/or the transmission shaft of the second tool apron 442, and realize the swinging angle of the first scraper 43 and the second scraper 44, so as to achieve the purpose of fine adjustment. In general, the first and second blades 43 and 44 are driven to rotate by the first and second cylinders, and the first and second glue thickness adjusting mechanisms 433 and 443 can be selected to further control the rotation of the blades before coating if necessary, and the gap between the blades and the coating roller is controlled by the angle to control the thickness of the glue.
As shown in fig. 10 and 11, the glue pressing mechanism 50 includes a guide seat 51, a sliding block 52, a base 53, a movable seat 54, and a pressing roller 55. The guide seat 51 is fixedly arranged on the frame 10, the sliding block 52 is movably matched with the guide seat 51 to form a mutual sliding structure, the base 53 is fixedly arranged on the sliding block 52, the base 53 is provided with a spring 56, the movable seat 54 is arranged on the base 53 and supports against the spring 56, the pressing roller 55 is arranged on the movable seat 54 in an erected mode, and the pressing roller 55 is parallel to the anti-adhesive coating roller. Because the guide seat 51 and the seat moving block of the gluing and compressing mechanism 50 are matched with each other, the compressing roller 55 can move out of the lower part of the anti-adhesive coating roller, and when the anti-adhesive coating roller does not work, the compressing roller 55 cannot be contacted with the anti-adhesive coating roller, so that the compressing roller 55 is prevented from being stuck with glue. When working is required, the pinch roller 55 can be moved directly under the anti-adhesive coating roller, and the design of the spring 56 allows the processed material to be uneven, for example, when the inclined midsole is glued, the head end (corresponding to the toe end) of the midsole is thinner, and the rear end (corresponding to the heel end) is thicker, and in this case, the spring 56 absorbs the uneven height difference, so that the gluing surface of the midsole always contacts the surface of the anti-adhesive coating roller.
The invention also discloses a gluing method based on the moisture curing polyurethane hot melt adhesive anti-sticking gluing machine, which comprises the following steps of
Step 1, placing a sealed and canned moisture-curable polyurethane hot melt adhesive into a preheating container 21, wherein the moisture-curable polyurethane hot melt adhesive is changed from a solid state to a liquid state in the preheating container 21;
Step 2, opening a storage tank mouth of the preheated canned moisture-curable polyurethane hot melt adhesive by using a storage tank mouth opening mechanism, and then mounting an anti-overflow glue outlet nozzle at the storage tank mouth; pulling the top sealing cover 63 open to expose the inner layer piston cover 64, putting the inner layer piston cover 64 into the extruder 31, and leading positive pressure to the inside of the extruder 31, wherein the positive pressure can squeeze the inner layer piston cover 64 to push the piston cover 64 so as to enable the moisture curing polyurethane hot melt adhesive to be extruded from the adhesive outlet 312;
Step 3, the moisture cured polyurethane hot melt adhesive flows onto an anti-adhesive coating roller, the anti-adhesive coating roller rolls, and then the scraper is used for uniformly distributing the adhesive on the anti-adhesive coating roller;
And 4, moving the gluing pressing mechanism 50 to the lower part of the gluing mechanism 40, forming a channel for gluing materials between the anti-gluing coating roller and the pressing roller 55, when the materials enter the anti-gluing coating roller from the channel, and under the power traction of the anti-gluing coating roller, the materials move along with the surface contacted with the anti-gluing coating roller to be coated with glue, and meanwhile, the pressing roller 55 always pushes the materials to the anti-gluing coating roller, so that the materials are contacted with the anti-gluing coating roller as much as possible, and the glue coating is completed after the materials are sent out.
After the gluing and stopping are finished in the above way, the anti-sticking coating roller, the scraper and the like of the gluing machine do not need to be cleaned. The glue spreading and pressing mechanism 50 can be integrally moved to the side in the treatment process, and then a glue waste collection box is placed under the anti-sticking glue coating roller, and excessive glue can flow to the glue waste collection box due to the anti-sticking property of the anti-sticking glue coating roller and the scraper, and the residual glue residues can fall off after being dried thoroughly by lightly wiping. The step of cleaning with a cleaning agent before the next gluing operation can be avoided.
Furthermore, based on the above-mentioned moisture-curable polyurethane hot-melt adhesive anti-sticking glue applicator, the invention also discloses a storage tank 60 for moisture-curable polyurethane hot-melt adhesive, as shown in fig. 12 and 13, comprising a tank body 61, wherein the bottom of the tank body 61 is provided with an anti-overflow glue outlet head 62, the top of the tank body 61 is provided with an opening, the opening is provided with a top sealing cover 63 in a sealing manner, a piston cover 64 is arranged in the tank body 61, the piston cover 64 divides the inner space of the tank body 61 into two parts, the part facing the glue outlet head 62 is a sealing glue cavity 65 for storing the moisture-curable polyurethane hot-melt adhesive, and the part facing the piston cover 64 is a cavity 66. The design of the piston cap 64 ensures that the glue is isolated from the outside air and does not contact the air to cure even if the top sealing cap 63 is opened. Additionally, the cavity 66 allows the glue to be extruded by the pressure generated by the air pressure acting on the piston rod when positive pressure is applied.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical principles of the present invention are still within the scope of the technical solutions of the present invention.
Claims (7)
1. A moisture curing polyurethane hot melt adhesive antiseized spreading machine which characterized in that: comprises a frame (10), wherein the frame (10) is provided with
A storage tank opening mechanism (70) provided with a threaded opening (71) corresponding to the storage tank opening, wherein a triangular bayonet (72) is fixed in the middle of the threaded opening, and is pushed by a tank opening cylinder (73) to fix the storage tank opening by internal and external threads, and a tank opening cylinder switch is opened to push the triangular bayonet out so as to pierce the storage tank opening;
The glue preheating mechanism (20) is arranged at a preheating station of the machine, and the glue preheating mechanism (20) is provided with a preheating container (21) for heating glue to be used;
the glue injection mechanism (30) is provided with a pneumatic extruder (31), the extruder (31) is provided with a heater, the pneumatic extruder (31) is connected with a rotary cylinder (33) through a connecting rod (32), and the rotary cylinder (33) drives the extruder (31) to move to a preheating station or a glue injection station; the inside of the extruder (31) is a cavity for placing canned glue, the cavity is of a sealing structure, the lower end of the cavity is provided with a glue outlet (312), and the upper end of the glue is connected with an air pipe (313);
The glue coating mechanism (40) is arranged below the glue injection mechanism (30) and comprises a glue-preventing coating roller (42), a first glue-preventing scraper (43) and a second glue-preventing scraper (44) which are positioned on two sides of the glue-preventing coating roller (42), wherein the glue-preventing coating roller (42) is driven by a motor (421) to drive a reduction gearbox (422), the first glue-preventing coating roller (43) is driven by a first driver (431), the second glue-preventing scraper (44) is driven by a second driver (441), and when coating is carried out, the first glue-preventing coating roller (43) and the second glue-preventing coating roller (44) are respectively driven by the first driver (431) and the second driver (441) to be attached to the surface of the glue-preventing coating roller (42); a glue coating thickness adjusting mechanism (433, 443) is arranged between the first scraper (43) and the anti-adhesive coating roller (42) and between the second scraper (44) and the anti-adhesive coating roller (42) and is used for clutching gaps among the first scraper, the second scraper and the anti-adhesive coating roller so as to adjust the thickness and uniformity of glue on the anti-adhesive coating roller;
The gluing and compacting mechanism (50) is arranged below the gluing mechanism (40) and is used for supporting the coated materials and propping the coated materials against the anti-adhesive coating roller (42); the gluing and pressing mechanism (50) comprises a guide seat (51), a sliding block (52), a base (53), a movable seat (54) and a pressing roller (55), wherein the guide seat (51) is fixedly arranged on a frame (10), the sliding block (52) is movably matched with the guide seat (51) to form a mutual sliding structure, the base (53) is fixedly arranged on the sliding block (52), a spring (56) is arranged on the base (53), the movable seat (54) is arranged on the base (53) and presses against the spring (56), the pressing roller (55) is arranged on the movable seat (54), and the pressing roller (55) is parallel to the anti-adhesive coating roller (42).
2. The moisture curable polyurethane hot melt adhesive release applicator of claim 1, wherein: and the surface of the anti-sticking coating roller (42) is sprayed with teflon (424), and an anti-sticking surface layer is formed on the surface.
3. The moisture curable polyurethane hot melt adhesive release applicator of claim 1, wherein: the first scraper (43) and the second scraper (44) are embedded teflon anti-sticking scraper blades.
4. The moisture curable polyurethane hot melt adhesive release applicator of claim 1, wherein: the first scraper (43) is arranged on the first scraper seat (432), the second scraper (44) is arranged on the second scraper seat (442), the first scraper seat (432) and the second scraper seat (442) are made of metal materials, and teflon (424) is sprayed on the surface of the scraper, so that an anti-sticking surface layer is formed on the surface of the scraper.
5. The moisture curable polyurethane hot melt adhesive release applicator of claim 1, wherein: the glue preheating mechanism (20) is provided with a connecting seat (22), a preheating container (21) is arranged on the connecting seat (22), the preheating container (21) is cylindrical, and a heater is arranged on the preheating container (21).
6. The moisture curable polyurethane hot melt adhesive release applicator of claim 1, wherein: the gluing amount and thickness adjusting mechanism is a first gluing amount and thickness adjusting mechanism (433) for driving a transmission shaft of the first scraper (43) and a second gluing amount and thickness adjusting mechanism (443) for driving a transmission shaft of the second scraper (44); one end of a swinging arm of the gluing thickness adjusting mechanism is arranged on a transmission shaft of the scraper, the other end of the swinging arm contacts with the triangular sliding block, and a fine adjustment head with a micrometer is used for adjusting the triangular sliding block so as to control the angle of the transmission shaft to clutch the gap between the scraper and the anti-sticking coating roller.
7. A glue application method, characterized in that: a moisture-curable polyurethane hot melt adhesive release applicator based on one of claims 1 to 6, comprising the steps of
Step 1, placing a sealed and canned moisture-curable polyurethane hot melt adhesive into a preheating container (21), wherein the moisture-curable polyurethane hot melt adhesive is changed from a solid state to a liquid state in the preheating container (21);
Step 2, opening a storage tank opening by using a storage tank opening mechanism, and mounting the anti-overflow glue outlet nozzle at the storage tank opening; pulling the preheated canned moisture-curable polyurethane hot melt adhesive off the top sealing cover (63), exposing the inner-layer piston cover (64), putting the sealing cover into the extruder (31), and introducing positive pressure into the extruder (31), wherein the positive pressure can squeeze the inner-layer piston cover (64), and pushing the piston cover (64) to extrude the moisture-curable polyurethane hot melt adhesive from the adhesive outlet (312);
step 3, the moisture cured polyurethane hot melt adhesive flows onto an anti-adhesive coating roller (42) which is anti-adhesive, the anti-adhesive coating roller rolls, and then a scraper is used for uniformly distributing the adhesive on the anti-adhesive coating roller;
And 4, moving a gluing pressing mechanism (50) to the lower part of the gluing mechanism (40) to form a channel for gluing materials between the anti-gluing coating roller (42) and the pressing roller (55), when the materials enter the anti-gluing coating roller from the channel, coating glue on the surface of the anti-gluing coating roller, which is contacted with the anti-gluing coating roller, while moving the materials, under the power traction of the anti-gluing coating roller, and simultaneously, pushing the materials to the anti-gluing coating roller by the pressing roller (55) all the time, so that the materials are contacted with the anti-gluing coating roller as much as possible, and coating the glue after the materials are sent out.
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| CN202011369844.5A CN112427260B (en) | 2020-11-30 | 2020-11-30 | Moisture curing polyurethane hot melt adhesive storage tank, anti-sticking adhesive applicator and adhesive coating method |
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| CN202011369844.5A CN112427260B (en) | 2020-11-30 | 2020-11-30 | Moisture curing polyurethane hot melt adhesive storage tank, anti-sticking adhesive applicator and adhesive coating method |
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| CN112427260B true CN112427260B (en) | 2024-08-16 |
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| CN213967393U (en) * | 2020-11-30 | 2021-08-17 | 广东力高树脂新材料有限公司 | Moisture-cured polyurethane hot melt adhesive anti-sticking gluing machine |
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| JP2010058440A (en) * | 2008-09-05 | 2010-03-18 | Kyodo Seiki:Kk | Gluing apparatus |
| CN104475297B (en) * | 2014-12-23 | 2017-01-18 | 广州圣夫瑞实业有限公司 | Multi-roll coating system |
| CN108237047A (en) * | 2018-02-10 | 2018-07-03 | 振德医疗用品股份有限公司 | A kind of glue spreading apparatus and its method of ventilative medical dressing |
| CN111058297B (en) * | 2019-12-31 | 2022-07-19 | 无锡诺尔特机械有限公司 | PUR hot melt adhesive full-coating equipment and full-coating process thereof |
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| CN213967393U (en) * | 2020-11-30 | 2021-08-17 | 广东力高树脂新材料有限公司 | Moisture-cured polyurethane hot melt adhesive anti-sticking gluing machine |
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