CN116475032A - PVC plastic dropping efficient dispensing process - Google Patents
PVC plastic dropping efficient dispensing process Download PDFInfo
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- CN116475032A CN116475032A CN202310343368.7A CN202310343368A CN116475032A CN 116475032 A CN116475032 A CN 116475032A CN 202310343368 A CN202310343368 A CN 202310343368A CN 116475032 A CN116475032 A CN 116475032A
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- dispensing
- glue
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- pvc
- preheating
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- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000004033 plastic Substances 0.000 title claims abstract description 17
- 239000003292 glue Substances 0.000 claims abstract description 212
- 239000000243 solution Substances 0.000 claims description 64
- 239000002245 particle Substances 0.000 claims description 29
- 238000002347 injection Methods 0.000 claims description 15
- 239000007924 injection Substances 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 12
- 238000004321 preservation Methods 0.000 claims description 7
- 238000000465 moulding Methods 0.000 claims description 5
- 238000007664 blowing Methods 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 230000001678 irradiating effect Effects 0.000 claims 2
- 238000007711 solidification Methods 0.000 abstract description 16
- 230000008023 solidification Effects 0.000 abstract description 16
- 230000001070 adhesive effect Effects 0.000 abstract description 7
- 239000000853 adhesive Substances 0.000 abstract description 6
- 238000004026 adhesive bonding Methods 0.000 abstract description 6
- 238000002360 preparation method Methods 0.000 abstract description 3
- 238000001816 cooling Methods 0.000 abstract description 2
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 239000004831 Hot glue Substances 0.000 description 11
- 239000007789 gas Substances 0.000 description 10
- 239000007788 liquid Substances 0.000 description 10
- 238000002156 mixing Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 238000005034 decoration Methods 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000000693 micelle Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 150000004756 silanes Chemical class 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 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
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/26—Processes for applying liquids or other fluent materials performed by applying the liquid or other fluent material from an outlet device in contact with, or almost in contact with, the surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0218—Pretreatment, e.g. heating the substrate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
- B05D3/061—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation using U.V.
- B05D3/065—After-treatment
- B05D3/067—Curing or cross-linking the coating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The invention relates to a PVC plastic dropping high-efficiency dispensing process, which relates to the technical field of dispensing processes and comprises the following steps: step one, glue solution preparation, step two, workpiece preheating and conveying, carry out laser preheating to the position that the workpiece needs to be glued, and carry out conveying through the conveyer, step three, the fixed point, step four, glue dispensing, the position of fixed point is discerned, and glue dispensing is carried out, step five, solidification, utilize ultraviolet lamp and low temperature gas to carry out solidification to glue dispensing position, accomplish the spot gluing processing, through preheating the workpiece, improve the adhesive strength between glue solution and the workpiece, and when glue dispensing is carried out, carry out the fixed point first to the workpiece, conveniently carry out accurate spot coating glue solution in the settlement position, through adding the UV glue in the inside of glue solution, and when solidifying, through ultraviolet irradiation and low temperature cooling, be convenient for carry out fast curing to glue dispensing position, improve glue dispensing efficiency, and then be convenient for carry out fast accurate high-efficient and carry out glue dispensing processing.
Description
Technical Field
The invention relates to the technical field of dispensing processes, in particular to a PVC plastic dropping efficient dispensing process.
Background
The drop molding technology utilizes the characteristic that a thermoplastic polymer material has state-variable property, namely has viscosity under certain conditions, can recover solid state at normal temperature, uses a proper method and special tools for spraying, forms a designed form according to requirements under the viscous state, then is solidified and molded under normal temperature, adopts PVC colloidal particles for drop molding, namely PVC drop molding, and sometimes uses a dispensing process to spot-coat PVC glue on a workpiece for completing a specific shape and achieving an effect when the drop molding is carried out, forms the specific shape or achieves the specific requirements after the curing, and is widely used in more fields at present.
The publication number is: CN114602748A, a hot melt adhesive dispensing process. Which comprises the following steps: heating the modified silane hot melt adhesive and the PUR hot melt adhesive in dispensing equipment; according to the product requirements, setting dispensing parameters in dispensing equipment, firstly dispensing PUR hot melt adhesive on a dispensing path of a frame of a backlight module, and then intermittently dispensing modified silane hot melt adhesive; after the hot melt adhesive is dispensed, the glass cover plate is attached to the backlight module, and then the pressure is maintained for 30 seconds, so that the hot melt adhesive is fully contacted with the product; and standing the finished product for 30min for testing the working capacity, and if the finished product needs to be assembled, standing for 2h. The invention mainly provides the hot melt adhesive dispensing process which reduces the influence of a high-temperature high-humidity environment on the adhesive property of the hot melt adhesive, increases the contact area of the hot melt adhesive and a product, improves the adhesive strength of the hot melt adhesive, reduces the adhesive opening risk of the product and can meet the existing narrow-frame adhesive dispensing requirement.
And the publication number is as follows: CN109826851B, a dispensing process, comprising the following steps: s1, dispensing a decoration piece; s2, bonding the decorating part and the touch screen to form a first assembly part; s3, pressing the first assembly part; s4, dispensing the front shell; s5, bonding the front shell and the first assembly to form a second assembly; s6, pressing the second assembly part; s7, curing the second assembly. Compared with the prior art, the bonding sequence of the decoration, the touch screen and the front shell is changed, the vacuum adsorption fixture is used for dispensing the decoration, the decoration is glued with the touch screen and then glued with the front shell, the fixture usage amount is small, and the finished product precision can be improved.
But when using, there is the precision that the point was glued lower to after gluing, the connectivity between glue solution and the work piece is relatively poor, and after gluing, the solidification rate is slower, is inconvenient for carrying out quick high-efficient processing of gluing.
Disclosure of Invention
In order to overcome the technical defects in the prior art, the invention provides the PVC plastic dropping high-efficiency dispensing process, when the PVC plastic dropping high-efficiency dispensing process is operated, the workpiece is preheated, so that the adhesive strength between glue solution and the workpiece is improved, the precise dispensing is convenient to perform through fixed points, the precision of dispensing is improved, the UV glue is added into the glue solution, and then the UV glue is cured through an ultraviolet lamp, so that the curing speed is improved, the rapid and high-efficiency processing is convenient, and the use is convenient.
The technical scheme adopted by the invention is as follows: the PVC plastic dropping high-efficiency dispensing process comprises the following steps of:
step one, preparing glue solution, conveying the melted glue solution into an injection type glue dispenser, fully mixing PVC colloidal particles and UV glue when melting, and controlling the proportion in a weight ratio when mixing: 80-95 parts by weight of PVC colloidal particles and 0.1-0.23 part by weight of UV glue are stirred and mixed, so that the UV glue is coated on the surfaces of the PVC colloidal particles, then the PVC colloidal particles and the UV glue are heated by a heater, so that glue liquid is formed by melting the PVC colloidal particles and the UV glue, the glue liquid is injected into an injection type glue dispenser for standby, and the glue liquid is in a heat-preserving state when in standby, so that the glue liquid is not solidified.
Step two, the workpiece is preheated and conveyed, the position where the workpiece needs to be glued is preheated by a conveyor, the workpiece is firstly fixed when preheated, the workpiece is fixed on the conveyor through an external fixing device, locating points for locating are uniformly arranged on the conveyor belt of the conveyor, the position on the workpiece is conveniently located, after the workpiece is fixed, the workpiece is conveyed by the conveyor, and when the workpiece and the environment on the conveyor are conveyed, blowing cleaning is carried out pneumatically, impurities are avoided, the whole environment is in a dust-free environment when operation is carried out, dust is avoided at the position where the workpiece needs to be glued, the gluing effect is influenced, and the workpiece is preheated by laser, when preheating is carried out, a plurality of laser beams are adopted to irradiate the workpiece at the irradiation position, hot spots are formed on the workpiece, when laser preheating is carried out, the position of glue is not in the preheating range, the conveyor is convenient to improve glue dispensing efficiency, and the workpiece is convenient to move.
And thirdly, fixing points, and marking the positions of the workpiece needing to be subjected to glue dispensing at fixed points, wherein when the positions are marked, a coordinate system is formed by taking the locating points on the conveyor in the second step as the original points, so that the positions of the workpiece needing to be subjected to glue dispensing are conveniently positioned, data coordinates are formed, the positions needing to be subjected to glue dispensing are conveniently pre-judged in advance, and the positions needing to be subjected to glue dispensing are conveniently pre-fixed in advance.
And in the second step, the workpiece is preheated, a plurality of lasers are adopted to heat, so that a preheating range of hot spot distribution is formed, and when the dispensing is performed, a temperature difference exists between a hot spot and a non-preheating position on the workpiece in the dispensing position, so that the connection strength between the glue spot and the workpiece is further improved, and the glue is conveniently fixed on the workpiece.
Step five, solidifying, utilizing ultraviolet lamp and low temperature gas to solidify the dispensing position, accomplish the dispensing processing, and when solidifying, carry the work piece after the dispensing to the position of ultraviolet lamp through the conveyer, when carrying out transportation, carry out ultraviolet lamp and shine, carry out ultraviolet curing to the UV glue in the glue solution, and then after solidifying, make the glue solution form semi-curing state, improve the solidification rate, and after semi-curing, the conveyer continues to carry the work piece, make the work piece pass through low temperature gas position, cool down the solidification to the glue solution, make the PVC glue solidify, and then improve the solidification efficiency, be convenient for carry out high-efficient processing, facilitate the use.
Preferably, in the first step, when the glue solution is prepared, the PVC colloidal particles and the UV glue are stirred and mixed, and when the glue solution is mixed, the temperature is controlled to be 50-70 ℃ so that the UV glue is coated on the surface of the PVC colloidal particles, after the glue solution is fully stirred, the PVC colloidal particles mixed with the UV glue are placed into the heating container, stirring and heating are carried out, the heating temperature is controlled to be 190-200 ℃, the UV glue and the PVC colloidal particles are melted to form the glue solution, the glue solution is conveyed into the injection type glue dispenser for glue dispensing standby, and when the glue solution is in the injection type glue dispenser, the heat preservation temperature is 180-190 ℃, the UV glue adopts a liquid form, when the glue solution is stirred, the UV glue is conveniently and uniformly coated on the surface of the PVC colloidal particles, when the glue solution is heated and melted, the UV glue is fully fused, and the UV glue adopts a colorless form, after the glue solution is formed, the glue solution is slowly stirred, the mixing effect is improved, and when the glue solution is stirred, the glue solution is vibrated, the glue solution is prevented from remaining to the inside the glue solution when the glue solution is stirred, and the glue solution is conveniently and the glue is filled into the injection type glue dispenser after the glue dispenser for dispensing.
Preferably, in the second step, when the workpiece is preheated, the workpiece is fixedly placed on the conveyor, and is fixedly irradiated by laser, and after preheating, the workpiece is conveyed and conveyed by the conveyor, so that the workpiece moves, and when the workpiece is heated by laser, the position needing dispensing is preheated in a range, the preheating temperature is 35-50 ℃, when the waste heat is carried out, the irradiation position of the laser moves along with the movement of the workpiece, and when the preheating is carried out, the workpiece keeps in a uniform motion state on the conveyor, so that the local heating is prevented from being too high or the dispensing efficiency is prevented from being influenced.
Preferably, in the third step, during the fixed point, the glue dispensing position of the workpiece transported on the conveyor is precisely positioned, the glue dispensing pad on the workpiece is confirmed according to the fixed point on the conveyor as an origin, the digital marking is performed at the position where the glue dispensing is required, the transverse coordinates and the longitudinal coordinates of the mark are recorded, the coordinate data are transmitted to the data center, the data center processes the data, the digital marking position is positioned in the preheating range of the laser preheating, and after the fixed point is performed, the conveyor continuously conveys the workpiece, and the workpiece is transported to the lower end of the glue dispensing machine for glue dispensing processing.
Preferably, in the fourth step, after the data center receives the digital mark, the position of the dispensing head on the dispensing machine is adjusted, and when the workpiece is transported to the position of the dispensing machine, the dispensing head is enabled to coincide with the transverse coordinate and the longitudinal coordinate data of the digital mark according to the positioning point on the conveyor, and further the dispensing position and the positioning point position are enabled to coincide, the glue solution is extruded through the dispensing machine, dispensing is carried out, the extruded quantity is controlled through the data center, accurate dispensing is carried out, the temperature on the workpiece is not lower than 30 ℃ when dispensing is carried out, and the dispensing position is located within the preheating range.
Preferably, when curing, the position where the glue is dispensed is irradiated with ultraviolet rays, so that the UV glue is cured quickly, and after the ultraviolet rays are irradiated, low-temperature gas is blown into the workpiece, so that the curing speed is increased, and the temperature of the low-temperature gas is lower than the room temperature by not more than 10 ℃, so that the PVC glue is cured completely, and the glue dispensing processing is completed.
The beneficial effects of the invention are as follows: through preheating the work piece, improve the adhesive strength between glue solution and the work piece, and when gluing to carry out, carry out the fixed point to the work piece earlier, conveniently carry out accurate with the glue solution point scribble in the settlement position, through adding the UV glue in the inside of glue solution to when solidifying, through ultraviolet irradiation and low temperature cooling, be convenient for carry out quick solidification to the point glue position, improve the point and glue efficiency, and then be convenient for carry out quick accurate efficient and carry out the point and glue processing, convenient operation.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
example 1
The embodiment provides a PVC plastic dropping high-efficiency dispensing process, which comprises the following steps:
the preparation of glue solution, and carry the glue solution that melts to the inside of injection formula point gum machine, and when melting, carry out intensive mixing with PVC micelle and UV glue, when mixing, the proportion is controlled according to weight ratio: the PVC glue is characterized in that the PVC glue comprises 80 parts by weight of PVC glue particles and 0.1 part by weight of UV glue, the PVC glue particles and the UV glue are stirred and mixed, the UV glue is coated on the surfaces of the PVC glue particles, then the PVC glue particles and the UV glue are heated by a heater, the PVC glue particles and the UV glue are melted to form glue liquid, the glue liquid is injected into an injection type glue dispenser for standby, and when the glue liquid is in a heat preservation state, and the glue liquid is not solidified.
The workpiece is preheated and conveyed, the workpiece is required to be subjected to laser preheating at the position where glue dispensing is required, the workpiece is conveyed through the conveyor, the workpiece is firstly fixed when the workpiece is preheated, the workpiece is fixed on the conveyor through an external fixing device, locating points for locating are uniformly arranged on the conveyor belt of the conveyor, the workpiece is conveniently located at the position where glue dispensing is required, after the workpiece is fixed, the workpiece is conveyed through the conveyor, and when the workpiece is conveyed, the workpiece and the conveyor are subjected to blowing cleaning through the pneumatic operation, impurities are avoided, the whole environment is in a dust-free environment when the workpiece is operated, dust is prevented from being present at the position where glue dispensing is required of the workpiece, the sticking effect is influenced, the workpiece is preheated through laser, the workpiece is irradiated by multiple beams of laser when the workpiece is preheated, hot spots are formed at the irradiation positions on the workpiece, the laser preheating is avoided when the laser is preheated, the glue dispensing positions are not in the preheating range, the glue dispensing efficiency is conveniently improved, and the workpiece is conveniently moved.
Fixed point, carry out the fixed point mark to the position that the work piece needs to carry out the point and glue, and when marking, through adopting the setpoint on the conveyer in step two as the origin, form the coordinate system, be convenient for carry out the location to the position that needs to carry out the point and glue on the work piece, form data coordinates, conveniently advance the judgement need the position of point and glue, be convenient for advance the fixed point.
And in the second step, when the workpiece is preheated, a plurality of lasers are adopted to heat, so that a preheating range of hot spot distribution is formed, and when the glue is dispensed, a temperature difference exists between a hot spot and a non-preheating position on the workpiece, so that the connection strength between the glue spot and the workpiece is further improved, and the glue is convenient to fix on the workpiece.
Curing, utilize ultraviolet lamp and low temperature gas to carry out the solidification to the dispensing position, accomplish the processing of dispensing, and when solidifying, carry the position to ultraviolet lamp through the work piece after the conveyer will be glued, when carrying out transportation, carry out ultraviolet lamp and shine, carry out ultraviolet curing to the UV glue in the glue solution, and then after the solidification, make the glue solution form semi-curing state, improve the cure rate, and after semi-curing, the conveyer continues to carry the work piece, make the work piece pass through low temperature gas position, cool down the solidification to the glue solution, make the PVC glue solidify, and then improve the solidification efficiency, be convenient for carry out high-efficient processing, facilitate the use.
When glue solution is prepared, firstly, PVC colloidal particles and UV glue are stirred and mixed, when the glue solution is mixed, the temperature is controlled to be 50-70 ℃ so that the UV glue is coated on the surface of the PVC colloidal particles, after the glue solution is fully stirred, the PVC colloidal particles mixed with the UV glue are placed into the heating container and are stirred and heated, the heating temperature is controlled to be 190-200 ℃ so that the UV glue and the PVC colloidal particles are melted to form glue solution, the glue solution is conveyed into an injection type glue dispenser for standby, when the glue solution is in the injection type glue dispenser, the heat preservation is carried out, the heat preservation temperature is 180-190 ℃, the UV glue adopts a liquid form, when the glue solution is stirred, the UV glue is conveniently and uniformly coated on the surface of the PVC colloidal particles, when the glue solution is heated and melted, the UV glue adopts a colorless form, after the glue solution is melted and mixed, forming glue solution, slowly stirring after forming the glue solution, vibrating while stirring to avoid bubbles remained in the glue solution, vibrating the bubbles, injecting the glue solution into an injection type glue dispenser for standby, conveniently dispensing glue in the fourth step, fixing the workpiece on a conveyor, fixing the workpiece, preheating by laser irradiation, conveying the workpiece by the conveyor after preheating, moving the workpiece, preheating the position where dispensing is needed by laser, preheating the position at 35-50 ℃, moving the laser irradiation position along with the movement of the workpiece when waste heat is performed, and preheating, the workpiece keeps a uniform motion state on the conveyor, so that the phenomenon that local heating is too high or the dispensing efficiency is affected is avoided.
When the fixed point is carried out, the glue dispensing position of the workpiece transported on the conveyor is accurately positioned, the glue dispensing pad on the workpiece is confirmed according to the original point of the positioning point on the conveyor, the digital marking is carried out at the position where the glue dispensing is needed, the transverse coordinates and the longitudinal coordinates of the mark are recorded, the coordinate data are transmitted to the data center, the data center processes the data, the position of the digital marking is positioned in the preheating range of the laser preheating, after the fixed point is carried out, the conveyor continuously conveys the workpiece, and the workpiece is transported to the lower end of the glue dispensing machine for glue dispensing processing.
When dispensing, the data center receives the digital mark, the position of the dispensing head on the dispensing machine is adjusted, when the workpiece is transported to the position of the dispensing machine, the positioning point on the conveyor is used as the origin, the dispensing head coincides with the transverse coordinate and the longitudinal coordinate data of the digital mark, the dispensing position coincides with the positioning point, the glue solution is extruded by the dispensing machine, dispensing is carried out, the extruded quantity is controlled by the data center, precise dispensing is carried out, the temperature on the workpiece is not lower than 30 ℃ when dispensing is carried out, the position of dispensing is positioned in the preheating range, when curing is carried out, the position of dispensing is irradiated with ultraviolet rays, so that UV glue is accelerated to be cured, and after the ultraviolet rays are irradiated, the workpiece is blown with low-temperature gas, the curing speed is accelerated, the low-temperature gas is lower than 10 ℃ below the room temperature, the PVC glue is completely cured, and the dispensing processing is completed.
The embodiment provides a PVC plastic dropping high-efficiency dispensing process, which comprises the following steps:
the preparation of glue solution, and carry the glue solution that melts to the inside of injection formula point gum machine, and when melting, carry out intensive mixing with PVC micelle and UV glue, when mixing, the proportion is controlled according to weight ratio: 95 parts by weight of PVC colloidal particles and 0.23 part by weight of UV glue are stirred and mixed, so that the UV glue is coated on the surfaces of the PVC colloidal particles, then the PVC colloidal particles and the UV glue are heated by a heater, so that the PVC colloidal particles and the UV glue are melted to form glue solution, the glue solution is injected into an injection type glue dispenser for standby, and when the glue solution is in a heat preservation state, so that the glue solution is not solidified.
The workpiece is preheated and conveyed, the workpiece is required to be subjected to laser preheating at the position where glue dispensing is required, the workpiece is conveyed through the conveyor, the workpiece is firstly fixed when the workpiece is preheated, the workpiece is fixed on the conveyor through an external fixing device, locating points for locating are uniformly arranged on the conveyor belt of the conveyor, the workpiece is conveniently located at the position where glue dispensing is required, after the workpiece is fixed, the workpiece is conveyed through the conveyor, and when the workpiece is conveyed, the workpiece and the conveyor are subjected to blowing cleaning through the pneumatic operation, impurities are avoided, the whole environment is in a dust-free environment when the workpiece is operated, dust is prevented from being present at the position where glue dispensing is required of the workpiece, the sticking effect is influenced, the workpiece is preheated through laser, the workpiece is irradiated by multiple beams of laser when the workpiece is preheated, hot spots are formed at the irradiation positions on the workpiece, the laser preheating is avoided when the laser is preheated, the glue dispensing positions are not in the preheating range, the glue dispensing efficiency is conveniently improved, and the workpiece is conveniently moved.
Fixed point, carry out the fixed point mark to the position that the work piece needs to carry out the point and glue, and when marking, through adopting the setpoint on the conveyer in step two as the origin, form the coordinate system, be convenient for carry out the location to the position that needs to carry out the point and glue on the work piece, form data coordinates, conveniently advance the judgement need the position of point and glue, be convenient for advance the fixed point.
And in the second step, when the workpiece is preheated, a plurality of lasers are adopted to heat, so that a preheating range of hot spot distribution is formed, and when the glue is dispensed, a temperature difference exists between a hot spot and a non-preheating position on the workpiece, so that the connection strength between the glue spot and the workpiece is further improved, and the glue is convenient to fix on the workpiece.
Curing, utilize ultraviolet lamp and low temperature gas to carry out the solidification to the dispensing position, accomplish the processing of dispensing, and when solidifying, carry the position to ultraviolet lamp through the work piece after the conveyer will be glued, when carrying out transportation, carry out ultraviolet lamp and shine, carry out ultraviolet curing to the UV glue in the glue solution, and then after the solidification, make the glue solution form semi-curing state, improve the cure rate, and after semi-curing, the conveyer continues to carry the work piece, make the work piece pass through low temperature gas position, cool down the solidification to the glue solution, make the PVC glue solidify, and then improve the solidification efficiency, be convenient for carry out high-efficient processing, facilitate the use.
Through embodiment one and embodiment two, can both satisfy the technology demand to PVC micelle and UV glue according to weight ratio, carry out the high-efficient quick point and glue processing to accelerate solidification efficiency and speed.
While the basic principles and main features of the invention and advantages of the invention have been shown and described, it will be understood by those skilled in the art that the invention is not limited by the foregoing embodiments, which are described in the foregoing description merely illustrate the principles of the invention, and that various changes and modifications may be made therein without departing from the spirit and scope of the invention, which is defined in the appended claims and their equivalents.
Claims (9)
- PVC plastic dropping efficient dispensing process is characterized in that: the method comprises the following steps:step one, preparing glue solution, and conveying the melted glue solution into an injection type glue dispenser;step two, preheating and conveying the workpiece, preheating the workpiece at the position where dispensing is required, and conveying the workpiece through a conveyor;thirdly, fixing points, and marking the positions of the workpiece needing to be subjected to dispensing at fixed points;fourthly, dispensing, identifying the position of the fixed point, and dispensing;and fifthly, curing, namely curing the dispensing position by utilizing ultraviolet lamps and low-temperature gas, and finishing the dispensing processing.
- 2. The efficient dispensing process for PVC plastic drop according to claim 1, wherein the process comprises the following steps: in the first step, when the glue solution is prepared, the PVC colloidal particles and the UV glue are stirred and mixed, and when the glue solution is mixed, the temperature is controlled at 50-70 ℃ to enable the UV glue to be coated on the surface of the PVC colloidal particles, after the glue solution is fully stirred, the PVC colloidal particles mixed with the UV glue are placed into the heating container, stirring and heating are carried out, the heating temperature is controlled between 190-200 ℃ to enable the UV glue and the PVC colloidal particles to melt, the glue solution is formed, and is conveyed into the injection type glue dispenser for glue dispensing standby, and when the glue solution is in the injection type glue dispenser, heat preservation is carried out, and the heat preservation temperature is 180-190 ℃.
- 3. The efficient dispensing process for PVC plastic drop according to claim 1, wherein the process comprises the following steps: in the second step, when the workpiece is preheated, the workpiece is fixedly placed on a conveyor and is fixed, the workpiece is preheated by laser irradiation, and after the workpiece is preheated, the workpiece is conveyed by the conveyor to be conveyed, so that the workpiece is moved.
- 4. A PVC drip molding efficient dispensing process according to claim 3, wherein: when heating is carried out by laser, the position needing dispensing is preheated in a range, and the preheating temperature is 35-50 ℃.
- 5. The efficient dispensing process for PVC plastic drop according to claim 1, wherein the process comprises the following steps: in the third step, when the fixed point is carried out, the glue dispensing position of the workpiece transported on the conveyor is accurately positioned, the glue dispensing pad on the workpiece is confirmed according to the original point of the positioning point on the conveyor, the position where the glue dispensing is required is digitally marked, the transverse coordinate and the longitudinal coordinate of the mark are recorded, the coordinate data are transmitted to the data center, and the data are processed by the data center.
- 6. The efficient PVC plastic dispensing process according to claim 5, wherein the process is characterized by: the position of the digital mark is positioned in the preheating range of the laser preheating, and after the fixed point is carried out, the workpiece is continuously conveyed by the conveyor and conveyed to the lower end of the dispensing machine for dispensing processing.
- 7. The efficient dispensing process for PVC plastic drop according to claim 6, wherein: in the fourth step, when dispensing is performed, after the data center receives the digital mark, the position of a dispensing head on the dispensing machine is adjusted, when a workpiece is transported to the position of the dispensing machine, the dispensing head is enabled to coincide with the transverse coordinate and the longitudinal coordinate data of the digital mark according to the positioning point on the conveyor, the dispensing position is enabled to coincide with the positioning point, the glue solution is extruded through the dispensing machine, dispensing is performed, and the extruded quantity is controlled through the data center, so that precise dispensing is performed.
- 8. The efficient dispensing process for PVC plastic drop according to claim 7, wherein: when dispensing is performed, the temperature on the workpiece is not lower than 30 ℃, and the dispensing position is within the preheating range.
- 9. The efficient dispensing process for PVC plastic drop according to claim 1, wherein the process comprises the following steps: when curing, firstly irradiating ultraviolet rays on the position where the glue is dispensed to accelerate curing of the UV glue, and after irradiating the ultraviolet rays, blowing low-temperature gas into the workpiece to accelerate curing speed, wherein the low-temperature gas is lower than room temperature by not more than 10 ℃ to completely cure the PVC glue, thereby completing the glue dispensing processing.
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