CN113798130A - Integrated equipment and method for preparing and coating hot melt adhesive - Google Patents
Integrated equipment and method for preparing and coating hot melt adhesive Download PDFInfo
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- CN113798130A CN113798130A CN202111193966.8A CN202111193966A CN113798130A CN 113798130 A CN113798130 A CN 113798130A CN 202111193966 A CN202111193966 A CN 202111193966A CN 113798130 A CN113798130 A CN 113798130A
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- coating
- hot melt
- melt adhesive
- pneumatic switch
- flat nozzle
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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
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
- B05C5/0254—Coating heads with slot-shaped outlet
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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
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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
- B05C11/1002—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves
- B05C11/1005—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves responsive to condition of liquid or other fluent material already applied to the surface, e.g. coating thickness, weight or pattern
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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
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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
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
- B05C5/0245—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work for applying liquid or other fluent material to a moving work of indefinite length, e.g. to a moving web
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- 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
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention relates to the field of medical equipment, in particular to integrated equipment and a method for preparing and coating hot melt adhesive. The apparatus comprises: a stirrer; a melt coating assembly comprising: the hot melt adhesive device comprises a hot melt adhesive container, a pneumatic switch and a flat nozzle slit coating cutter head; wherein the bottom surface of the hot melt adhesive container is provided with a material outlet which is communicated with the flat nozzle slit coating tool bit, and the communicated channel is provided with the pneumatic switch; a coated film assembly comprising: the back glue coating support roller is used for supporting a coating film, and the back glue coating support roller and the flat nozzle slit coating tool bit clamp the coating film in the middle; and a control component. The invention can meet the requirement of small-batch and customized production of the medical patch.
Description
Technical Field
The invention relates to the field of medical equipment, in particular to integrated equipment and a method for preparing and coating hot melt adhesive.
Background
The small-batch manufacturing process of the existing hot melt adhesive patch comprises the following steps: the container for containing the hot melt adhesive material is heated to a preset temperature, the stirrer is used for stirring the uniformly mixed material for a long time, then the hot melt adhesive which is well mixed and stirred is poured into the coating device in a high-temperature state for coating from the release film, a back lining is attached after the coating is finished, and finally the required patch product is obtained by cutting.
In the transfer process of the hot melt adhesive material after stirring and mixing at a high temperature state, the temperature of the material is reduced easily in the operation process, the material is semi-solidified and is not easy to add coating equipment, the high-temperature scalding risk is easily caused in the rapid operation, the whole operation is troublesome, and the material is wasted.
Common coating film coating methods: knife coating, smooth roll coating, mesh roll coating.
The four-side coater device with the flat plate heating function is adopted in scraper type coating, the flat plate is heated to a preset temperature, hot melt adhesive is poured onto the flat plate, and then the push rod is controlled to push the four-side coater to be molded at a constant speed. Problems in the forming process are: the amount of poured glue is not easy to control and form accumulation, the width of the coating forming in the length direction is not uniform, the excessive glue on the flat plate is not easy to recover after one-time action, and the material waste is caused; secondly, the step of: the hot melt adhesive is easy to cool in the process of pouring the adhesive, the accumulated hot melt adhesive is heated on a flat plate to form a material with uneven temperature, and the coating quality defects of material pulling, tearing and the like often occur in the coating and forming at constant speed; ③: the four-side coating tool and the push rod are only connected back to back, the tipping condition is easily generated in the coating process, the coating thickness is not uniform, and a manual auxiliary pressing tool is often needed in the coating process.
The smooth roll coating adopts two or more rolls to rotate, and the gap between the scraper and the smooth roll is adjusted by fine motion, so that high-precision coating is carried out. Problems in the forming process are: the high-temperature hot melt adhesive needs to be poured into a material containing space formed by a scraper and a smooth roller manually, the operation is inconvenient, the required material amount is large, and the small-amount manufacture is not facilitated, namely: the scraper micro-motion adjusting device used frequently changes in high and low temperatures easily causes the precision change and the unstable precision of the glue thickness: the smooth roller and the scraper are directly contacted with a coating material, so that the smooth roller and the scraper need to be cleaned in time after being used every time, the heating device is internally arranged, and the smooth roller and the scraper need to be disassembled and assembled during cleaning, so that challenges are brought to preparations and related operators.
The screen roller coating adopts the anilox roller to carry out gluing, the uniformity of the gluing amount in the width direction is good, the coating amount is accurate, but the gluing thickness is inconvenient to adjust and the miniaturization application is difficult.
Aiming at the manufacturing requirements of small-batch and customized patches, the process device and the mode cannot effectively meet the manufacturing requirements.
Disclosure of Invention
The invention aims to solve the problems that the prior art device cannot continuously complete the preparation of hot melt adhesive and effectively realize the high-precision coating of large-area viscoelastic hot melt materials, and provides equipment and a method capable of integrating automatic continuous hot melt adhesive preparation and high-precision coating, which can meet the requirements of small-batch and customized production of medical patches.
In order to achieve the above object, a first aspect of the present invention provides an integrated hot melt adhesive preparation and coating apparatus, comprising:
the stirrer is used for stirring the materials;
a melt coating assembly comprising: the hot melt adhesive device comprises a hot melt adhesive container, a pneumatic switch and a flat nozzle slit coating cutter head; the top surface of the hot melt adhesive container is provided with an opening, a stirring head of the stirrer is placed in the hot melt adhesive container in a suspended mode, the bottom surface of the hot melt adhesive container is provided with a material outlet, the material outlet is communicated with the flat nozzle slit coating tool bit, and the communicated channel is provided with the pneumatic switch;
a coated film assembly comprising: the back glue coating support roller is used for supporting a coating film, and the back glue coating support roller and the flat nozzle slit coating tool bit clamp the coating film in the middle; and the number of the first and second groups,
and the control assembly is used for controlling the operation of each component in the equipment.
In one example, the control assembly includes one or more of the following modules: right the hot melt adhesive container carries out temperature control's hot melt adhesive container temperature control module, right the flat mouth slit coating tool bit carries out temperature control's flat mouth slit coating tool bit temperature control module, right the back glue coating backing roll carries out temperature control's back glue coating backing roll temperature control module, control pneumatic switch's the air supply process's of back glue coating backing roll pneumatic switch air feed module, control the coating air feed module of the coating air feed process of flat mouth slit coating tool bit.
In one example, the coating gas supply module comprises: a coating air supply switch, a coating glue extrusion precise pressure reducing valve and a coating glue extrusion gas pressure gauge.
In one example, the pneumatic switch is internally provided with a feeding channel, the A end of the feeding channel is opened at the side close to one end of the strip-shaped pneumatic switch 3, and the B end of the feeding channel is opened at the top surface of the other end of the pneumatic switch and is further directly or indirectly connected with the feeding hole of the flat nozzle slit coating cutter head.
In one example, in the state that the pneumatic switch is opened, the A end of the feeding channel is positioned inside the hot melt adhesive container, so that the hot melt adhesive can enter the feeding channel, and the adhesive is supplied to the flat nozzle slit coating cutter head in a one-step mode; under the state that pneumatic switch closed, feed channel's A end is linked together with second air supply mouth, second air supply mouth has adjustable air feed speed for control hot melt adhesive passes through feed channel to the speed that the flat mouth slit coating tool bit flows and the play of flat mouth slit coating tool bit glues.
In one example, the flat nozzle slit coating tool bit comprises a coating tool bit body and a mounting reference block, wherein the mounting reference block is used for controlling the distance between the coating tool bit body and the back glue coating support roller, namely the coating thickness.
In one example, the flat-mouth slit coating tool bit further comprises a coating head spring for controlling the extrusion force of the installation reference block on the coating film and the back glue coating support roller.
In one example, the slot coating tool bit further comprises a slot forming block, and a fixed slot is formed between the slot forming block and the slot coating tool bit, so that a hot melt adhesive storage space is formed, and effective pressure throttling is guaranteed.
In one example, the coated film assembly further includes an adhesive backing platform for holding the coated film and attaching a backing thereto.
In one example, the tape backing platform comprises: the device comprises a rolling rod for supporting the coating film, a clamp for fixing the rolling rod and the coating film, a driver for dragging the coating film to advance, a reverse pressure wheel for tensioning the coating film, and a mechanical stop block for controlling the coating length.
In one example, the coating film assembly further comprises a coating film storage roller for carrying an uncoated coating film and continuously conveying the coating film to the back adhesive coating support roller.
In a second aspect, the present invention provides a method for continuously preparing and coating a hot melt adhesive, which is performed using the apparatus of the first aspect, the method comprising:
heating the hot melt adhesive in a hot melt adhesive container and stirring the hot melt adhesive through a stirrer;
and moving the coating film, opening a pneumatic switch, and discharging the hot melt adhesive through the flat nozzle slit coating tool bit to form an adhesive layer on the coating film.
In one example, the method includes controlling, by a control component, one or more of:
controlling the temperature of the hot melt adhesive container through a hot melt adhesive container temperature control module to enable the hot melt adhesive to reach and keep a molten state;
the temperature control module of the flat nozzle slit coating cutter head is used for controlling the temperature of the flat nozzle slit coating cutter head, so that the hot melt adhesive can be maintained in a molten state when passing through the flat nozzle slit coating cutter head;
controlling the air supply process of the pneumatic switch through an air supply module of the pneumatic switch, so that the hot melt adhesive leaves the hot melt adhesive container at a preset amount and/or speed;
the coating air supply process of the flat nozzle slit coating cutter head is controlled through the coating air supply module, so that the hot melt adhesive leaves the coating cutter head body of the flat nozzle slit coating cutter head at a preset amount and/or speed;
and controlling the temperature of the back glue coating supporting roller by a back glue coating supporting roller temperature control module.
In one example, the process of opening the pneumatic switch to make the hot melt adhesive flow out through the flat nozzle slit coating cutter head to form the adhesive layer on the coating film comprises the following steps:
controlling the first air supply port to supply air to open the pneumatic switch, enabling the hot melt adhesive in the hot melt adhesive container to enter the flat nozzle slit coating cutter head for storage, controlling the pneumatic switch to be closed after a preset storage capacity is reached, setting the precise pressure reducing valve to a preset pressure reducing parameter, and controlling the coating air supply switch to be opened to enable the hot melt adhesive to flow out of the coating cutter head at a preset speed; and controlling air pressure through the second air supply port to enable the glue discharging speed to be uniform or according to a preset curve.
In one example, the method further comprises: on the back lining platform, the rolling rod and the coating film are clamped through a clamp, the coating film is dragged to move forward by a driver, and the moving speed is adjusted through an air inlet throttle valve and an air outlet throttle valve; the back pressure wheel is adjusted to tension the coating film, and the position of the mechanical stop block is adjusted to realize the control of the coating length.
In one example, the method comprises the steps of:
s1, adding materials into the hot melt adhesive container, setting the temperature of the hot melt adhesive container, and stirring until the materials are molten;
s2, setting the temperature of the coating cutter head and the temperature of the back glue coating support roller; turning on a pneumatic switch, maintaining the T1 time to enable the glue amount to be enough for one-time coating, and turning off the pneumatic switch;
s3, opening a coating air supply switch, observing the air pressure value of a coating glue extrusion air pressure gauge, and adjusting a pressure reducing valve if necessary to enable the glue outlet speed V1 to be matched with the coating film moving speed V2;
s4, coating an air supply switch, attaching a backing, and cutting the formed patch.
Through the technical scheme, compared with the prior art, the invention at least has the following advantages:
(1) a glue film with small thickness deviation and uniform width can be formed;
(2) the preparation and high-precision coating of the hot melt adhesive can be automatically completed;
(3) the patch can flexibly meet the requirements of technical research and development, small-batch and customized patch preparation, and the cost of technical development materials is saved;
(4) materials can be put in at one time, the hot melt adhesive preparation and coating operation can be directly completed, the operation time is saved, and the risk of scalding personnel in the high-temperature material transfer process is avoided;
(5) can be through coating tool bit benchmark block structure, quick adjustment coating thickness, coating glue thickness uniformity can be guaranteed in multiple operation.
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.
Drawings
FIG. 1 is a schematic diagram of an apparatus according to an embodiment of the present invention.
FIG. 2 is a schematic external view of the melt coating assembly of FIG. 1.
FIG. 3 is a cross-sectional view of the melt coated module and partially coated module of FIG. 1.
Fig. 4 is a cross-sectional view of the melt coating assembly of fig. 2.
Fig. 5 is a cross-sectional view of the component of fig. 4 in a state where the pneumatic switch is opened to supply the adhesive to the cutter head.
FIG. 6 is a schematic cross-sectional view of the device of FIG. 4 with the tip coated with a coating under pressure-controlled venting.
Fig. 7 is a schematic representation of a tape backing platform, fig. 7a is a front view, and fig. 7b is a top view.
Detailed Description
The present invention will be described in detail below by way of examples. The described embodiments of the invention are only some, but not all embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An integrated hot melt adhesive preparation and coating apparatus according to one embodiment is shown in fig. 1 to 7.
As shown in fig. 1, an example integrated hot melt adhesive preparation and coating apparatus includes at least an agitator 1, a melt coating assembly (including at least a hot melt adhesive container 2, a pneumatic switch 3, and a slot die 4), a coating film assembly (including at least a backing adhesive coating backup roll 5), and a control assembly 8.
The structure of the stirrer 1 is not particularly limited, and may include an upper drive member and a lower stirring paddle as shown in fig. 1, wherein the stirring paddle is placed in suspension inside the hot melt adhesive container 2.
The hot melt adhesive container 2 is used to provide space for melting and storing the adhesive material, and is not particularly limited in shape and structure, and may be in the form of a cylindrical barrel with an open top as shown in fig. 1. The bottom surface of the hot melt adhesive container 2 is provided with a material outlet which is communicated with the flat nozzle slit coating tool bit 4, and the communicated channel is provided with the pneumatic switch 3.
FIG. 2 is a schematic drawing of the melt coating assembly of FIG. 1 in profile. The external configuration of the hot melt adhesive container 2 and the external configuration of the slot coating blade 4 are visible from the figure, and the pneumatic switch 3 is located inside the intermediate connecting member, which is not visible from figure 2.
Fig. 3 to 6 show the internal structure and the operation of the melt coating module.
In one example, the pneumatic switch 3 is in the form of a strip (e.g., cylindrical) that is capable of sliding, in a piston-like manner, air-tight, inside the connecting member between the hot melt adhesive container 2 and the flatmouth slit-coating blade 4 shown in fig. 2. In order to achieve gas tightness, gas sealing can be carried out by means of a sealing ring.
In one example, a spring 31 is provided in the pneumatic switch 3, as shown in fig. 4, for controlling the up and down movement of the pneumatic switch 3.
In one example, the pneumatic switch 3 is internally provided with a feed channel, the end a of the feed channel is opened at the side close to one end of the bar-shaped pneumatic switch 3, and the end B of the feed channel is opened at the top surface of the other end of the bar-shaped pneumatic switch 3 and is further directly or indirectly connected with the feed port of the flat nozzle slit coating tool bit 4.
In one example, a fixedly connected first end face having a diameter larger than that of the portion of the pneumatic switch 3 which performs the piston movement is provided at that end of the pneumatic switch 3 which is adjacent to the a-end of the conduit path, so as to fix the end point of the downward movement of the pneumatic switch 3 (i.e., when the pneumatic switch 3 is closed, placed in the state shown in fig. 4), and to enable the hot melt adhesive container 2 to be completely divided without material leakage.
In one example condition, as shown in FIG. 5, the first air supply port 21 is communicated, the pneumatic switch 3 is opened (moved upwardly to the top), and the first end port located within the hot melt adhesive container 2 is raised upwardly so that the A port of the feed passageway is moved upwardly into the hot melt adhesive container 2 so that hot melt adhesive can enter the feed passageway and one-shot adhesive supply occurs. The process can utilize the self weight to supply glue for the coating cutter head, and can also adopt gas pressure to push the glue supply according to different material characteristics. When the glue supply reaches a predetermined amount (e.g., the amount required for one application), the pneumatic switch 3 is moved downwardly until the first end surface engages the bottom surface of the hot melt adhesive container 2, which is now the condition shown in FIG. 4.
In one example condition, as shown in FIG. 6, the pneumatic switch 3 is closed (moved downwardly to the bottom so that the first end surface is in engagement with the bottom surface of the hot melt adhesive container 2), and the A port of the feed passage is communicated with the second air supply port 22. Through the adjustment the air feed speed of second air supply port 22 to control hot melt adhesive pass through feed channel to the speed that flat mouth slit coating tool bit 4 flows and flat mouth slit coating tool bit 4 goes out to glue. Preferably, the glue outlet speed of the cutter head is recorded as V1.
Preferably, the glue discharging speed V1 matches the moving speed V2 of the driver 76.
In one example, as shown in fig. 3, the flat nozzle slit coating tool includes a coating tool body 43 and a mounting reference block 42, wherein the mounting reference block 42 is used for controlling the slit distance, i.e., the coating thickness, between the coating tool body 43 and the back adhesive coating support roller 5. Through control installation reference block 42 height, form coating thickness t with gum coating backing roll 5, can be simple in the use just can adjust the rubber coating thickness through changing installation reference block 42, the rubber coating thickness passes through tool bit support reference block automatic control reliable and stable, avoids fine setting structure to receive the temperature influence long-term accuracy after using to lose the problem.
In one example, the flat-mouth slit coating tool bit 4 further comprises a coating head spring 44 for controlling the extrusion force of the coating tool bit body 43 on the gum coating support roller 5 through the installation reference block 42, so that the friction damage in the coating process is effectively solved.
In one example, the flatmouth slot coating blade further comprises a slot forming block 45, as shown in fig. 4, which slot forming block 45 forms a fixed slot (e.g. by screwing) with the flatmouth slot coating blade 4, and functions as: (1) the rectangular cross section with the forming width B and the slit delta ensures that pressure throttling is effectively formed, so that the hot melt adhesive is smoothly extruded only after pressure control gas is introduced, the situation that the hot melt adhesive flows out through gravity to cause that a coating film with uniform width cannot be formed, and then the glue solution is not controlled to cause that equipment is not easy to clean is avoided; (2) a hot melt adhesive storage space is formed, and the materials supplied for 1 coating after the pneumatic switch 3 is turned on can be effectively stored. The width B and the slit δ adjust the relevant structure dimensions according to the characteristics of the material and the coating width requirements.
In one example, the coating head body 43 interfaces with the hot melt adhesive container 2 by connecting the seal shaft 41, which may also be sealed with a gasket or a slip fit, depending on the hot melt adhesive material.
According to one embodiment, the coating film assembly of the apparatus of fig. 1 comprises at least a backing-adhesive coating support roller 5, the backing-adhesive coating support roller 5 being adapted to support the coating film. The back adhesive coating support roller 5 has a roller and a roller having the roller as an axis, and the coating film is placed on the upper surface of the roller in an expanded state and is in movable line contact with the roller. The roller can reduce friction with the coating film in a rolling manner.
In one example, the back glue coating support roller 5, the coating film and the flat nozzle slit coating tool tip 4 are arranged in sequence from bottom to top, the back glue coating support roller 5 is in close line contact with the coating film, a slit distance is left between the flat nozzle slit coating tool tip 4 and the coating film, and the thickness of the coating can be controlled by controlling the slit distance.
In one example, the trial-application back-adhesive coating support roller 5 is provided with a heating device and can be controlled by the control component 8, and the temperature-controlled flat-nozzle slit coating cutter head and the temperature-controlled back-adhesive coating support roller form effective control on the adhesive temperature environment of the coating area.
In one example, as shown in fig. 1, the coating film assembly further comprises a coating film storage roll 6, and the coating film storage roll 6 is used for bearing the uncoated coating film and continuously conveying the coating film to the back adhesive coating support roll. The coating film storage roll 6 may have a roller and a roller having the roller as an axis, and the uncoated coating film may be wound on the coating film storage roll 6 in multiple layers for storage.
The material of the coating film is not particularly limited, and may be, for example, a release film.
In one example, as shown in fig. 1, the coated film assembly further includes an adhesive backing platform 7 for holding the coated film and attaching a backing thereto.
In one example, as shown in fig. 7, the tape backing platform may comprise: a rolling rod 77 for supporting the coating film, a clamp 75 for fixing the rolling rod and the coating film, a driver 76 for pulling the coating film forward (for example, a rodless cylinder drive, other cylinder forms or a motor can be adopted as a drive mode), a counter-pressure wheel 73 for tensioning the coating film, and a mechanical stop 74 for controlling the coating length. And (4) sticking the back lining on a back lining sticking platform by the coating film coated with the hot melt adhesive.
According to a specific embodiment, the various components of the apparatus are controlled by a control assembly.
In one example, as shown in FIG. 1, the control components include, but are not limited to, one or more of the following modules: it is right the hot melt adhesive container carries out temperature control's hot melt adhesive container temperature control module 81, right the flat mouth slit coating tool bit carries out temperature control's flat mouth slit coating tool bit temperature control module 82, right the back gum coating backing roll carries out temperature control's back gum coating backing roll temperature control module 83, control pneumatic switch's air supply process's pneumatic switch air feed module 84, control the coating air feed module of the coating air feed process of flat mouth slit coating tool bit.
In one example, the coating gas supply module comprises: a coating gas supply switch 85, a coating glue extrusion precision pressure reducing valve 86 and a coating glue extrusion gas pressure gauge 87.
In one example, the hot melt adhesive container temperature control module 81 is in the form of a control panel.
In one example, the flatmouth slot coating bit temperature control module 82 is in the form of a control panel.
In one example, the adhesive-backed backup roll temperature control module 83 is in the form of a control panel.
In one example, the pneumatic switch air supply module 84 is in the form of a switch.
In one example, the control assembly further includes a power switch 88 and a power outlet 89.
In one example, the apparatus further comprises heating and/or insulating components, such as a heater 9 and an insulating sleeve 10 as shown in FIG. 4. For example, the coating can be heated by 36V safe voltage, and the temperature control is arranged at the coating glue outlet, so that the coating temperature of the material can be stably kept constant.
In this document, the terms "first", "second" (e.g., first gas supply port, second gas supply port), etc. containing numbers are used only for distinguishing different components and are not used to limit the order.
The continuous preparation and coating of the hot melt adhesive can be carried out using the apparatus, and the coating process can be carried out in the following manner.
The method is carried out, for example, on the apparatus described in fig. 1 to 7.
In one example, the method comprises:
heating the hot melt adhesive in a hot melt adhesive container 2 and stirring the hot melt adhesive through a stirrer 1;
and moving the coating film, opening a pneumatic switch, and discharging the hot melt adhesive through the flat nozzle slit coating tool bit to form an adhesive layer on the coating film.
And covering the adhesive layer with a backing on the backing platform.
In one example, the method includes controlling, by a control component, one or more of:
the temperature of the hot melt adhesive container 2 is controlled by a hot melt adhesive container temperature control module 81, so that the hot melt adhesive reaches and keeps a molten state;
the flat nozzle slit coating tool bit temperature control module 82 is used for controlling the temperature of the flat nozzle slit coating tool bit 4, so that the hot melt adhesive can be maintained in a molten state when passing through the flat nozzle slit coating tool bit;
the air supply process of the pneumatic switch 3 is controlled by means of a pneumatic switch air supply module 84, so that the hot melt adhesive leaves the hot melt adhesive container 2 in a preset amount and/or speed;
the coating air supply process of the flat nozzle slit coating tool bit 4 is controlled by a coating air supply module, so that the hot melt adhesive leaves the coating tool bit body 43 of the flat nozzle slit coating tool bit 4 at a preset amount and/or speed;
the temperature of the back glue coating support roller 5 is controlled by a back glue coating support roller temperature control module 83.
In one example, the process of opening the pneumatic switch 3 to make the hot melt adhesive flow out through the flat nozzle slit coating cutter head 4 to form the adhesive layer on the coating film comprises the following steps:
controlling the first air supply port 21 to supply air to open the pneumatic switch 3, so that the hot melt adhesive in the hot melt adhesive container 2 enters the coating cutter head 4 to be stored, and the state is shown in fig. 5; after the preset storage capacity is reached, the pneumatic switch 3 is controlled to be closed, the precise pressure reducing valve 86 is set to the preset pressure reducing parameter, the coating air supply switch 85 is controlled to be opened, and the hot melt adhesive flows out of the coating cutter head at the preset speed, wherein the state is shown in fig. 6; the air pressure is controlled through the second air supply port 22, so that the glue discharging speed is uniform or according to a preset curve. The glue discharging speed V1 is matched with the moving speed V2 of the driver 76, and effective coating is formed.
In one example, the method further comprises: on the back lining platform 7, a rolling rod 77 and a coating film are clamped by a clamp 75, the coating film is dragged to move forwards by a driver 76, and the moving speed V2 is adjusted by an air inlet and air outlet throttle valve; the coating film is tensioned by adjusting the counter-pressure wheel 73, and the position of the mechanical stop 74 is adjusted to realize the control of the coating length. As shown in fig. 7, the coating area of the a × B standard is formed. After coating, the glue 7.a is naturally and rapidly cooled, and a backing 7.b backing with the AxB specification is attached. Cutting to obtain the patch with preset size.
In one example, the method comprises the steps of:
s1, adding materials into the hot melt adhesive container 2, setting the temperature of the hot melt adhesive container 2, and stirring until the materials are molten;
s2, setting the temperature of the coating cutter head body 43 and the gum coating support roller 5; turning on the pneumatic switch 3 and keeping the T1 time to ensure that the glue amount is enough for one-time coating use, and then turning off the pneumatic switch;
s3, opening a coating air supply switch 85, observing the air pressure value of a coating glue extrusion air pressure gauge 87, and adjusting a pressure reducing valve 86 if necessary to enable the glue outlet speed V1 to be matched with the coating film moving speed V2;
s4, closing the coating air supply switch 85, attaching the backing and cutting the formed patch.
In one example, the equipment and the method can coat the hot melt adhesive with the thickness of 0.1-1.5 mm, the width of 10-176 mm and the length of 10-350 mm in a single time, and the formed adhesive film has small thickness deviation and uniform width.
Example 1
The target is as follows: 5 parts of patch with the coating thickness of 0.1mm, the width of 170mm and the length of 350mm are required to be obtained according to the forming specification.
Using the apparatus shown in figures 1 to 7.
The method comprises the following steps:
1. adding materials into a hot melt adhesive container 2 with the temperature controlled at 150 ℃, continuously stirring by using a stirrer 1 for a long time, uniformly mixing the colors of the stirred materials, and enabling the adhesive to reach a molten state;
2. setting the flat nozzle slit coating tool bit 4 and the gum coating support roller 5 at 150 ℃, and adopting a digital temperature controller to control the temperature stably to be +/-0.5 ℃;
3. the pneumatic switch 3 is opened by ventilation, the glue flows into the coating cutter head 4 after 3 minutes depending on the glue amount of 5.95ml of gravity, and the pneumatic switch 3 is closed;
4. adjusting the pressure value of the precision pressure reducing valve 86 to 0.1bar, pressing the air supply switch 85 for 10s, and finishing one coating action;
5. sticking a back lining, cutting a formed patch, pressing a button, reversely supplying air by a rodless cylinder, returning to an initial position, and clamping a rolling rod and a release film (coating film) by a clamp;
6. the pneumatic switch is turned on again for 3 minutes, the glue flows into the coating cutter head after the glue amount of 5.95ml of gravity, and then the pneumatic switch is turned off;
7. and performing subsequent action circulation to obtain the required quantity of patches.
With the above-described embodiments, the apparatus and method have the following advantages:
(1) a glue film with small thickness deviation and uniform width can be formed;
(2) the preparation and high-precision coating of the hot melt adhesive can be automatically completed;
(3) the patch can flexibly meet the requirements of technical research and development, small-batch and customized patch preparation, and the cost of technical development materials is saved;
(4) materials can be put in at one time, the hot melt adhesive preparation and coating operation can be directly completed, the operation time is saved, and the risk of scalding personnel in the high-temperature material transfer process is avoided;
(5) can be through coating tool bit benchmark block structure, quick adjustment coating thickness, coating glue thickness uniformity can be guaranteed in multiple operation.
The preferred embodiments of the present invention have been described above in detail, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications can be made to the technical solution of the invention, including combinations of various technical features in any other suitable way, and these simple modifications and combinations should also be regarded as the disclosure of the invention, and all fall within the scope of the invention.
Claims (10)
1. The utility model provides a hot melt adhesive preparation and coating integration equipment which characterized in that, this equipment includes:
the stirrer is used for stirring the materials;
a melt coating assembly comprising: the hot melt adhesive device comprises a hot melt adhesive container, a pneumatic switch and a flat nozzle slit coating cutter head; the top surface of the hot melt adhesive container is provided with an opening, a stirring head of the stirrer is placed in the hot melt adhesive container in a suspended mode, the bottom surface of the hot melt adhesive container is provided with a material outlet, the material outlet is communicated with the flat nozzle slit coating tool bit, and the communicated channel is provided with the pneumatic switch;
a coated film assembly comprising: the back glue coating support roller is used for supporting a coating film, and the back glue coating support roller and the flat nozzle slit coating tool bit clamp the coating film in the middle; and the number of the first and second groups,
and the control assembly is used for controlling the operation of each component in the equipment.
2. The apparatus of claim 1, wherein the control assembly comprises one or more of the following modules: the device comprises a hot melt adhesive container temperature control module for controlling the temperature of the hot melt adhesive container, a flat nozzle slit coating cutter head temperature control module for controlling the temperature of the flat nozzle slit coating cutter head, a back adhesive coating support roller temperature control module for controlling the temperature of the back adhesive coating support roller, a pneumatic switch air supply module for controlling the air supply process of a pneumatic switch, and a coating air supply module for controlling the coating air supply process of the flat nozzle slit coating cutter head;
preferably, the coating gas supply module includes: a coating air supply switch, a coating glue extrusion precise pressure reducing valve and a coating glue extrusion gas pressure gauge.
3. The apparatus according to claim 1 or 2, wherein the pneumatic switch is internally provided with a feed channel, the A end of the feed channel is opened at the side close to one end of the strip-shaped pneumatic switch 3, the B end of the feed channel is opened at the top surface of the other end of the pneumatic switch and is further directly or indirectly connected with the feed port of the flat nozzle slit coating tool bit;
preferably, in the state that the pneumatic switch is opened, the end A of the feeding channel is positioned inside the hot melt adhesive container, so that the hot melt adhesive can enter the feeding channel, and the adhesive is supplied to the flat nozzle slit coating cutter head in a one-step mode;
under the state that pneumatic switch closed, feed channel's A end is linked together with second air supply mouth, second air supply mouth has adjustable air feed speed for control hot melt adhesive passes through feed channel to the speed that the flat mouth slit coating tool bit flows and the play of flat mouth slit coating tool bit glues.
4. The apparatus of claim 1 or 2, wherein the flatmouth slot coating blade comprises a coating blade body and a mounting reference block, wherein the mounting reference block is used for controlling the distance between the coating blade body and the back adhesive coating support roller, namely the coating thickness;
preferably, the flat nozzle slit coating tool bit further comprises a coating head spring for controlling the extrusion force of the mounting reference block to the coating film and the back glue coating support roll;
preferably, the flat nozzle slit coating tool bit further comprises a slit forming block, and a fixed slit is formed between the slit forming block and the flat nozzle slit coating tool bit and is used for forming a space for storing hot melt adhesive and ensuring effective formation of pressure throttling.
5. The apparatus of claim 1 or 2, wherein the coated film assembly further comprises an adhesive backing platform for holding the coated film and attaching a backing thereto;
preferably, the tape backing platform comprises: the device comprises a rolling rod for supporting the coating film, a clamp for fixing the rolling rod and the coating film, a driver for dragging the coating film to advance, a reverse pressure wheel for tensioning the coating film, and a mechanical stop block for controlling the coating length;
preferably, the coating film assembly further comprises a coating film storage roller for carrying an uncoated coating film and continuously conveying the coating film to the back adhesive coating support roller.
6. A method for the continuous preparation and application of hot melt adhesives, characterized in that it is carried out using the apparatus according to any one of claims 1 to 5, and in that it comprises:
heating the hot melt adhesive in a hot melt adhesive container and stirring the hot melt adhesive through a stirrer;
and moving the coating film, opening a pneumatic switch, and discharging the hot melt adhesive through the flat nozzle slit coating tool bit to form an adhesive layer on the coating film.
7. The method of claim 6, wherein the method comprises controlling, by a control assembly, one or more of:
controlling the temperature of the hot melt adhesive container through a hot melt adhesive container temperature control module to enable the hot melt adhesive to reach and keep a molten state;
the temperature control module of the flat nozzle slit coating cutter head is used for controlling the temperature of the flat nozzle slit coating cutter head, so that the hot melt adhesive can be maintained in a molten state when passing through the flat nozzle slit coating cutter head;
controlling the air supply process of the pneumatic switch through an air supply module of the pneumatic switch, so that the hot melt adhesive leaves the hot melt adhesive container at a preset amount and/or speed;
the coating air supply process of the flat nozzle slit coating cutter head is controlled through the coating air supply module, so that the hot melt adhesive leaves the coating cutter head body of the flat nozzle slit coating cutter head at a preset amount and/or speed;
and controlling the temperature of the back glue coating supporting roller by a back glue coating supporting roller temperature control module.
8. The method of claim 6 or 7, wherein the step of opening the pneumatic switch to make the hot melt adhesive flow out from the coating film through the flat nozzle slit coating knife head to form the adhesive layer on the coating film comprises the following steps:
controlling the first air supply port to supply air to open the pneumatic switch, enabling the hot melt adhesive in the hot melt adhesive container to enter the flat nozzle slit coating cutter head for storage, controlling the pneumatic switch to be closed after a preset storage capacity is reached, setting the precise pressure reducing valve to a preset pressure reducing parameter, and controlling the coating air supply switch to be opened to enable the hot melt adhesive to flow out of the coating cutter head at a preset speed; and controlling air pressure through the second air supply port to enable the glue discharging speed to be uniform or according to a preset curve.
9. The method of claim 6 or 7, wherein the method further comprises: on the back lining platform, the rolling rod and the coating film are clamped through a clamp, the coating film is dragged to move forward by a driver, and the moving speed is adjusted through an air inlet throttle valve and an air outlet throttle valve; the back pressure wheel is adjusted to tension the coating film, and the position of the mechanical stop block is adjusted to realize the control of the coating length.
10. The method according to claim 6 or 7, wherein the method comprises the steps of:
s1, adding materials into the hot melt adhesive container, setting the temperature of the hot melt adhesive container, and stirring until the materials are molten;
s2, setting the temperature of the coating cutter head and the temperature of the back glue coating support roller; turning on a pneumatic switch, maintaining the T1 time to enable the glue amount to be enough for one-time coating, and turning off the pneumatic switch;
s3, opening a coating air supply switch, observing the air pressure value of a coating glue extrusion air pressure gauge, and adjusting a pressure reducing valve if necessary to enable the glue outlet speed V1 to be matched with the coating film moving speed V2;
s4, coating an air supply switch, attaching a backing, and cutting the formed patch.
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| CN113798130B (en) | 2022-05-17 |
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