CN114055783A - Ultrasonic welding process for injection molding - Google Patents
Ultrasonic welding process for injection molding Download PDFInfo
- Publication number
- CN114055783A CN114055783A CN202111457840.7A CN202111457840A CN114055783A CN 114055783 A CN114055783 A CN 114055783A CN 202111457840 A CN202111457840 A CN 202111457840A CN 114055783 A CN114055783 A CN 114055783A
- Authority
- CN
- China
- Prior art keywords
- injection molding
- ultrasonic welding
- paper
- label paper
- ultrasonic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000003466 welding Methods 0.000 title claims abstract description 127
- 238000001746 injection moulding Methods 0.000 title claims abstract description 90
- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000008569 process Effects 0.000 title claims abstract description 23
- 238000010030 laminating Methods 0.000 claims abstract description 72
- 238000000465 moulding Methods 0.000 claims abstract description 12
- 238000002372 labelling Methods 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims description 58
- 230000007246 mechanism Effects 0.000 claims description 53
- 238000001035 drying Methods 0.000 claims description 39
- 239000010410 layer Substances 0.000 claims description 30
- 239000012528 membrane Substances 0.000 claims description 29
- 239000011248 coating agent Substances 0.000 claims description 26
- 238000000576 coating method Methods 0.000 claims description 26
- 239000007788 liquid Substances 0.000 claims description 21
- 239000004743 Polypropylene Substances 0.000 claims description 19
- 239000004626 polylactic acid Substances 0.000 claims description 18
- 239000007888 film coating Substances 0.000 claims description 15
- 238000009501 film coating Methods 0.000 claims description 15
- 238000005520 cutting process Methods 0.000 claims description 14
- 238000004321 preservation Methods 0.000 claims description 14
- 239000011127 biaxially oriented polypropylene Substances 0.000 claims description 12
- 229920006378 biaxially oriented polypropylene Polymers 0.000 claims description 12
- 238000007731 hot pressing Methods 0.000 claims description 10
- 230000003028 elevating effect Effects 0.000 claims description 2
- 238000002347 injection Methods 0.000 claims 3
- 239000007924 injection Substances 0.000 claims 3
- 238000004806 packaging method and process Methods 0.000 abstract description 4
- 235000013305 food Nutrition 0.000 abstract description 3
- 229920000747 poly(lactic acid) Polymers 0.000 description 17
- 230000009471 action Effects 0.000 description 11
- 239000000853 adhesive Substances 0.000 description 11
- 230000001070 adhesive effect Effects 0.000 description 11
- 230000005520 electrodynamics Effects 0.000 description 7
- 230000015556 catabolic process Effects 0.000 description 6
- 238000006731 degradation reaction Methods 0.000 description 6
- 229920003023 plastic Polymers 0.000 description 6
- 239000004033 plastic Substances 0.000 description 6
- 238000001816 cooling Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 210000002489 tectorial membrane Anatomy 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000000071 blow moulding Methods 0.000 description 2
- 238000010924 continuous production Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 239000004831 Hot glue Substances 0.000 description 1
- 239000004594 Masterbatch (MB) Substances 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 235000014655 lactic acid Nutrition 0.000 description 1
- 239000004310 lactic acid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009967 tasteless effect Effects 0.000 description 1
- 238000009757 thermoplastic moulding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
- B29C65/7802—Positioning the parts to be joined, e.g. aligning, indexing or centring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
- B29C65/7858—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus characterised by the feeding movement of the parts to be joined
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
- B29C66/022—Mechanical pre-treatments, e.g. reshaping
- B29C66/0224—Mechanical pre-treatments, e.g. reshaping with removal of material
- B29C66/02241—Cutting, e.g. by using waterjets, or sawing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
- B29C66/024—Thermal pre-treatments
- B29C66/0242—Heating, or preheating, e.g. drying
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
An ultrasonic welding process for molding an injection molding piece relates to the technical field of food packaging, wherein the injection molding piece automatically runs to one side of ultrasonic welding equipment in an intermittent conveying mode along the same direction, laminating label paper automatically runs to a welding station of the ultrasonic welding equipment in the intermittent conveying mode along the same direction, the ultrasonic welding equipment sequentially and automatically picks up the injection molding piece and puts the injection molding piece into the welding station according to a set speed until the labeling position of the injection molding piece is aligned and attached with the laminating label paper, meanwhile, the ultrasonic welding equipment is started, ultrasonic waves with a set frequency and welding pressure simultaneously act on the surfaces of the injection molding piece and the laminating label paper which are attached with each other at the welding station and keep a certain welding time, after the welding time is timed, the welding station continues to perform ultrasonic welding on the next injection molding piece and the laminating label paper, and the ultrasonic welding equipment realizes the fastening connection between two objects by utilizing an ultrasonic principle, the operation is convenient.
Description
Technical Field
The invention relates to the technical field of food packaging, in particular to an ultrasonic welding process for injection molding.
Background
The PP material is polypropylene which is a non-toxic, odorless and tasteless milky high-crystalline polymer with the density of only 0.90-0.91g/cm3 and is one of the lightest varieties of all plastics at present. It is particularly stable to water, has a water absorption of only 0.01% in water and a molecular weight of about 8 to 15 ten thousand. But the formability is good, but because the shrinkage rate is large (1% -2.5%), thick-wall products are easy to dent, the requirements on parts with higher dimensional precision are difficult to meet, and the surface gloss of the products is good.
Polylactic acid (PLA), also known as polylactide, is a polyester polymer obtained by polymerizing lactic acid as a main raw material, is prepared by using a starch raw material provided by a renewable plant resource (such as corn), and is a novel biodegradable material. The thermal stability is good, the processing temperature is 170-230 ℃, and the mechanical property and the physical property are good. The polylactic acid is suitable for various processing methods such as blow molding, thermoplastic molding and the like, is convenient to process and has wide application.
In the existing food packaging container, with the improvement of living standard of people, products such as plastic containers, paper-plastic containers and the like become necessities of daily life of people, and the labeling mode of the plastic containers and the paper-plastic containers during processing and manufacturing mostly adopts an in-mold label or an adhesive label, namely, the printed trademark label image is directly placed into a mold area in a plastic mold machine, and the label and the container are combined together through blow molding or injection molding to form a complete packaging container. The biggest characteristic of the container using the in-mold label is that the label and the bottle body are on the same surface, the color pictures and texts of the label are sensed as if the label is directly printed on the surface of the bottle body, and the container is natural and integrated, has novel and attractive appearance and is firmly embedded. The adhesive label is formed by firmly adhering label paper on the outer wall of the container through an adhesive, wherein the adhesive can be glue or hot melt adhesive.
However, the existing in-mold label is mostly an in-mold labeling product made of a PP material, the label paper made of PP particles and the PP material is fused and molded by using an injection molding process, and the label paper labeled by using an adhesive is used, so that the whole container is not favorable for degradation and is not environment-friendly enough.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an ultrasonic welding process for molding an injection molding part, and the specific scheme is as follows:
an ultrasonic welding process for molding an injection molding part is specifically as follows:
the injection molding is automatically operated to one side of ultrasonic welding equipment in an intermittent conveying mode along the same direction, the laminating label paper is automatically operated to a welding station of the ultrasonic welding equipment in the intermittent conveying mode along the same direction, the injection molding and the laminating label paper are arranged at intervals, the ultrasonic welding equipment sequentially and automatically grips the injection molding and puts the injection molding into the welding station according to a set speed until the labeling position of the injection molding is aligned and attached to the laminating label paper, meanwhile, the ultrasonic welding equipment is started, ultrasonic waves with a set frequency and welding pressure are simultaneously acted on the surface where the injection molding and the laminating label paper are attached to each other at the welding station, a certain welding time is kept, and after the welding time is timed, the welding station continues to perform ultrasonic welding on the next injection molding and the laminating label paper;
the injection molding with drench membrane label paper and adopt the same material to make, the injection molding adopts PLA, PP or BOPP material.
Furthermore, the power of the ultrasonic welding equipment is 1000w, and the frequency is 15-20 KHZ.
Further, the laminated label paper comprises label base material paper and a laminated layer, before the laminated label paper runs to a welding station, the laminated layer is formed on the label base material paper in real time by the ultrasonic welding equipment, and the prepared laminated label paper is conveyed to the welding station of the ultrasonic welding equipment after being dried for a set drying time.
Furthermore, one side of the ultrasonic welding equipment, which is located at the welding station, is provided with a lifting type film laminating mechanism and an adjustable type drying mechanism, and the adjustable type drying mechanism is close to the welding station.
Further, before the label base paper enters the lifting type film laminating mechanism, a separable single piece of label base paper is formed through an automatic cutting process.
Furthermore, the ultrasonic welding equipment is provided with a hot-pressing cutting mechanism in front of the lifting type laminating mechanism, and breakpoint connecting lines arranged at intervals are formed on the surface of the label base material paper through the hot-pressing cutting mechanism.
Further, when the injection molding piece adopts a PLA material, the working process of the lifting type film covering mechanism is as follows:
pouring the prepared film coating liquid into a heat preservation groove of a lifting type film coating mechanism, setting the heat preservation temperature within the range of 190 plus-minus 195 ℃, forming a layer of film coating liquid on the surface of a coating wheel partially immersed in the heat preservation groove after rotating forward and backward for 5-10 circles, controlling the temperature of the coating wheel at 205 plus-minus 215 ℃, enabling a transfer wheel above the coating wheel to perform lifting motion to press the label base paper to be in contact with the surface of the coating wheel, and gradually forming a continuous film coating layer on one surface of the lower label base paper by pulling external force.
Further, the drying process of the film laminating label paper from the lifting type film laminating mechanism by the adjustable drying mechanism is as follows:
firstly, drying for 3-5 minutes in a uniform motion manner under the environment of a drying temperature of 78-80 ℃, and then drying for 5-8 minutes in a uniform motion manner under the environment of a drying temperature of 63-65 ℃.
Furthermore, the ultrasonic welding equipment is provided with a manipulator for grabbing injection molding parts, and the manipulator can do up-down and left-right reciprocating motion and up-down and left-right overturning motion.
Compared with the prior art, the invention has the following beneficial effects:
(1) when the injection molding and the laminating label paper are both positioned at the welding station, ultrasonic wave of certain frequency generated by the ultrasonic welding equipment acts on the injection molding and the laminating label paper, PLA materials on the surfaces of the injection molding and the laminating label paper are mutually dissolved to generate intermolecular connecting force, and the injection molding and the laminating label paper are adhered together under the action of certain welding pressure, so that labeling can be completed at a specific position of the injection molding, and the next labeling operation can be continued after the ultrasonic welding equipment, so that continuous production is realized, and the working efficiency is higher. In summary, ultrasonic welding equipment utilizes the ultrasonic principle to realize the fastening connection between two objects, and the mode of adhering labels does not need to use adhesives, so that the material cost is saved, the possibility of environmental pollution caused by adhesives is reduced, and the injection molding part and the laminating label paper can be completely and easily separated under the action of smaller external force in the mode of in-mold labeling, so that the possibility of residual stains on the surface of the injection molding part is reduced.
Therefore, ultrasonic welding equipment drenches the combination of membrane tag paper to the injection molding of PLA material and PLA, when the injection molding of BOPP material and the combination that BOPP drenches membrane tag paper carry out weldment work, PLA, BOPP belong to degradable material, whole injection molding can direct processing retrieve, degradation nature and feature for environmental protection are greatly improved, drench the combination of membrane tag paper to the injection molding of PP material and PP, although the PP material is difficult to degrade, but the prior art can drench membrane tag paper earlier PP and separate, also can avoid using the adhesive, degradation nature and feature for environmental protection are improved relatively.
(2) Drench membrane label paper and transport to ultrasonic bonding equipment's welding station after being prepared in real time by ultrasonic bonding equipment, so set up, drench the membrane layer on the membrane label paper and just formed well under the high temperature state, still do not cool off to the state of stabilizing under the normal atmospheric temperature, material mechanical properties this moment can take place fast and mutually dissolve between the injection molding that corresponds under ultrasonic wave and pressure effect, and then make whole surface of drenching membrane label paper produce intermolecular joining power with bigger surface area and injection molding, guarantee adhesive strength.
(3) Through setting up over-and-under type tectorial membrane mechanism, adjustable stoving mechanism, hot pressing cutting mechanism, the longer label substrate paper of length is at first accomplished the setting of breakpoint connecting wire in hot pressing cutting mechanism, both can guarantee that label substrate paper gets into in subsequent over-and-under type tectorial membrane mechanism with continuous, complete state, can realize again that final drench membrane label paper can separate from whole drench membrane label paper under the exogenic action after accomplishing once pasting the mark again, is convenient for shift to other subsequent processes with the injection molding together.
When the lifting type film laminating mechanism works, the film laminating liquid is heated to the temperature capable of working normally in the heat preservation tank, in order to overcome the gravity of the film laminating liquid and the centrifugal action of the coating wheel, the coating wheel improves the uniformity of the film laminating liquid on the surface of the coating wheel in a mode of forward rotation and reverse rotation in sequence, the temperature can be reduced when the outermost film laminating liquid of the coating wheel is contacted with the outside air, the temperature of the film laminating liquid on the whole layer is uneven and can be lower than 170 ℃, the temperature of the coating wheel is higher than that of the heat preservation tank, the film laminating liquid can be at a better working temperature before being transferred to the label base material paper, the film laminating liquid is transferred to the surface of the label base material paper under the jacking action of the coating wheel, and the integrity, the stability and the uniformity of the film laminating layer on the label base material paper are improved.
When the adjustable drying mechanism works, the label base material paper on which the laminating layer is just coated is firstly dried for a short time at 78-80 ℃ with a slightly high temperature and then dried for a long time at 63-65 ℃ with a slightly low temperature, the first section of drying environment is used for quickly carrying out heat exchange and cooling on the laminating layer with the temperature being close to more than 130 ℃, the laminating layer is convenient to form in a short time, the integrity and the stability of the laminating layer on the label base material paper are further improved, the second section of drying environment is used for stably cooling and drying the cooled laminating layer, and the laminating layer is guaranteed to be cured and formed before entering a welding station.
Detailed Description
The present invention will be described in further detail with reference to examples, but the present invention is not limited to these examples.
The utility model provides an ultrasonic welding technology is used in injection molding, specifically is to cooperate the realization jointly with the mechanism that sets up around ultrasonic welding equipment and the ultrasonic welding equipment for accomplish the injection molding and drench the welding operation on the two surfaces of membrane label paper, realize fastening connection, can also guarantee under certain exogenic action that the two can easily separate.
In this embodiment, ultrasonic welding equipment sets up to the device that can produce the ultrasonic wave of certain frequency at the during operation, and the ultrasonic wave specifically produces in ultrasonic welding equipment's welding station department, and the welding station is actually taken effect for the face of weld that two are relative to set up, and ultrasonic welding equipment can carry out ascending elevating movement in vertical direction in welding station department in order to realize being close to of two faces of weld, keeping away from. For the work that reduces the manual work of getting and putting the injection molding, drench membrane label paper, the mechanism that sets up around the ultrasonic bonding equipment includes electrodynamic type conveyer belt, manipulator etc. and the electrodynamic type conveyer belt is the intermittent type formula conveyor that can adjust conveying speed, direction of transportation in real time among the prior art, and the manipulator is for being used for snatching, shifting the device of object.
Place a plurality of injection molding that the interval set up in succession on an electrodynamic type conveyer belt, the longer drenches membrane label paper of length in succession on another electromotive force conveyer belt, parallel arrangement between two electrodynamic type conveyer belts, and one of them electrodynamic type conveyer belt erects in the welding work station, consequently, the concrete process of ultrasonic welding technology is: the injection molding piece automatically moves to one side of the ultrasonic welding equipment along the same direction in an intermittent conveying mode on the electric conveyer belt, the laminating label paper automatically moves to a welding station of the ultrasonic welding equipment along the same direction in the intermittent conveying mode on the electric conveyer belt, the injection molding piece and the laminating label paper are arranged at intervals, a manipulator on the ultrasonic welding equipment sequentially and automatically picks the injection molding piece and puts the injection molding piece into a welding station according to a set speed until the labeling position of the injection molding piece is aligned and attached with the laminating label paper, meanwhile, ultrasonic welding equipment is started, ultrasonic waves with set frequency and welding pressure are simultaneously acted on the surfaces, which are mutually attached, of the injection molding piece and the laminating label paper at a welding station, a certain welding time is kept, after the welding time is timed, and continuously carrying out ultrasonic welding on the next injection molding piece and the laminated label paper at the welding station.
When the injection molding and the laminating label paper are both positioned at the welding station, ultrasonic wave of certain frequency generated by the ultrasonic welding equipment acts on the injection molding and the laminating label paper, PLA materials on the surfaces of the injection molding and the laminating label paper are mutually dissolved to generate intermolecular connecting force, and the injection molding and the laminating label paper are adhered together under the action of certain welding pressure, so that labeling can be completed at a specific position of the injection molding, and the next labeling operation can be continued after the ultrasonic welding equipment, so that continuous production is realized, and the working efficiency is higher. In this embodiment, the power of the ultrasonic welding equipment is 1000w, the frequency is 15-20KHZ, and at this frequency, the welding work generates high-frequency mechanical vibration, and the high-frequency mechanical vibration is applied to the injection molding piece and the laminated label paper, so that the temperature is raised through the friction between the surface and the molecules, when the temperature reaches the melting point of the laminated label paper, the high-frequency mechanical vibration is rapidly melted and then filled in the gap between the injection molding piece and the laminated label paper, and when the vibration stops, the injection molding piece and the laminated label paper are simultaneously cooled and shaped under a certain pressure, and then the ultrasonic welding between the injection molding piece and the laminated label paper can be completed.
Optimized, the conveying speed of two electrodynamic type conveyer belts can be according to the injection molding, the production speed of drenching membrane label paper adjusts, avoid weldment work's confusion, the manipulator on the ultrasonic welding equipment can be about, reciprocating motion and upper and lower, control the upset motion, the manipulator is about, when controlling reciprocating motion, be convenient for adjust the injection molding and drench the position between the membrane label paper, if the position of putting of injection molding electrodynamic type conveyer belt is reversed, or lead to the position slope under the external disturbance, the manipulator is about, control the upset motion, be convenient for adjust the injection molding to the correct position, the angle, thereby guarantee to paste the mark position on the injection molding can aim at with drenching membrane label paper fast.
In this embodiment, the injection molding and drench membrane label paper and adopt the same material to make, and the injection molding adopts PLA, PP or BOPP material, and PLA belongs to degradable material, belongs to degradable material after adding the degradable master batch in the BOPP material, and the PP material belongs to difficult degradation material. Particularly, ultrasonic welding equipment drenches the combination of membrane tag paper to the injection molding of PLA material and PLA, when the injection molding of BOPP material and the combination that BOPP drenches membrane tag paper carry out weldment work, PLA, BOPP belongs to degradable material, whole injection molding can direct processing retrieve, degradation and feature for environmental protection are greatly improved, drench the combination of membrane tag paper to the injection molding of PP material and PP, although the PP material is difficult to degrade, but relative prior art can drench membrane tag paper separation with PP earlier, also can avoid using the adhesive, degradation and feature for environmental protection are improved relatively.
The existing similar process of ultrasonic welding of workpieces generally adopts welding materials which are already processed for a long time, the welding materials are in a state with very stable physical, chemical and mechanical properties, the speed of heating to a state capable of melting the rotary table from a stable state under the action of high-speed friction is slow, the required time is very long, and the working efficiency is influenced. According to the invention, the laminated label paper comprises the label base material paper and the laminated layer, so that compared with the existing welding material, the laminated label paper provided by the invention is formed on the label base material paper in real time by the ultrasonic welding equipment before running to the welding station, and the prepared laminated label paper is subjected to a drying process with set drying time and then conveyed to the welding station of the ultrasonic welding equipment.
Drench membrane label paper and transport to ultrasonic bonding equipment's welding station after being prepared in real time by ultrasonic bonding equipment, so set up, drench the membrane layer on the membrane label paper and just formed well under the high temperature state, still do not cool off to the state of stabilizing under the normal atmospheric temperature, material mechanical properties this moment can take place fast and mutually dissolve between the injection molding that corresponds under ultrasonic wave and pressure effect, and then make whole surface of drenching membrane label paper produce intermolecular joining power with bigger surface area and injection molding, guarantee adhesive strength.
How to realize the real-time preparation of the laminating label paper is concretely as follows: one side of the ultrasonic welding equipment, which is positioned at the welding station, is provided with a lifting type film covering mechanism and an adjustable drying mechanism, and the adjustable drying mechanism is arranged close to the welding station. The lifting film covering mechanism is similar to a device which can realize paint transfer through a rotatable and liftable wheel body in the prior art, and the adjustable drying mechanism is similar to a heat preservation cover which can adjust the temperature and has a longer stroke in the prior art.
Because the softening temperature and the melting point of PLA, PP, and BOPP materials are different, in this embodiment, the PLA material is used as an example, and when the injection molding part is made of the PLA material, the working process of the lifting film covering mechanism is as follows:
pouring the prepared film coating liquid into a heat preservation groove of a lifting type film coating mechanism, setting the heat preservation temperature within the range of 190 plus-minus 195 ℃, enabling the film coating liquid to be gradually softened to a melting state, forming a layer of film coating liquid on the surface of a coating wheel partially immersed in the heat preservation groove after the coating wheel rotates forwards and backwards for 5-10 circles, controlling the temperature of the coating wheel to be 205 plus-minus 215 ℃, enabling a transfer wheel above the coating wheel to do lifting motion to press the label base material paper to be in contact with the surface of the coating wheel, and gradually forming a continuous film coating layer on one surface of the label base material paper pulled by external force.
When the lifting type film laminating mechanism works, the film laminating liquid is heated to the temperature capable of working normally in the heat preservation tank, in order to overcome the gravity of the film laminating liquid and the centrifugal action of the coating wheel, the coating wheel improves the uniformity of the film laminating liquid on the surface of the coating wheel in a mode of forward rotation and reverse rotation in sequence, the temperature can be reduced when the outermost film laminating liquid of the coating wheel is contacted with the outside air, the temperature of the film laminating liquid on the whole layer is uneven and can be lower than 170 ℃, the temperature of the coating wheel is higher than that of the heat preservation tank, the film laminating liquid can be at a better working temperature before being transferred to the label base material paper, the film laminating liquid is transferred to the surface of the label base material paper under the jacking action of the coating wheel, and the integrity, the stability and the uniformity of the film laminating layer on the label base material paper are improved.
After the coating of the laminating layer is finished by the lifting laminating mechanism, the label base material paper immediately enters the adjustable drying mechanism, and the drying process of the laminating label paper from the lifting laminating mechanism by the adjustable drying mechanism is as follows:
firstly, drying for 3-5 minutes in a uniform motion manner under the environment of a drying temperature of 78-80 ℃, and then drying for 5-8 minutes in a uniform motion manner under the environment of a drying temperature of 63-65 ℃.
When the adjustable drying mechanism works, the label base material paper on which the laminating layer is just coated is firstly dried for a short time at 78-80 ℃ with a slightly high temperature and then dried for a long time at 63-65 ℃ with a slightly low temperature, the first section of drying environment is used for quickly carrying out heat exchange and cooling on the laminating layer with the temperature being close to more than 130 ℃, the laminating layer is convenient to form in a short time, the integrity and the stability of the laminating layer on the label base material paper are further improved, the second section of drying environment is used for stably cooling and drying the cooled laminating layer, and the laminating layer is guaranteed to be cured and formed before entering a welding station.
Preferably, before the label base paper enters the lifting type film laminating mechanism, the separable single label base paper is formed through an automatic cutting process. The automatic cutting process is correspondingly arranged as follows, the ultrasonic welding equipment is provided with a hot-pressing cutting mechanism before the lifting type film laminating mechanism, and the surface of the label base paper of the hot-pressing cutting mechanism is provided with breakpoint connecting lines arranged at intervals. The longer label substrate paper of length accomplishes the setting of breakpoint connecting wire at first in hot pressing cutting mechanism, both can guarantee that label substrate paper gets into in subsequent over-and-under type tectorial membrane mechanism with continuous, complete state, can realize again that final drenching membrane label paper can separate from whole drenching membrane label paper under the exogenic action after accomplishing once pasting the mark, is convenient for shift to other subsequent processes with the injection molding together.
Aiming at the temperature setting, the drying time and the rotation number setting which are related to the working of the lifting type film laminating mechanism, the adjustable drying mechanism and the hot-pressing cutting mechanism, the invention can adjust according to the characteristics of materials when PP and BOPP materials are used for preparing injection molding pieces and film label paper without limitation.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (9)
1. The ultrasonic welding process for molding the injection molding part is characterized by comprising the following specific steps of:
the injection molding is automatically operated to one side of ultrasonic welding equipment in an intermittent conveying mode along the same direction, the laminating label paper is automatically operated to a welding station of the ultrasonic welding equipment in the intermittent conveying mode along the same direction, the injection molding and the laminating label paper are arranged at intervals, the ultrasonic welding equipment sequentially and automatically grips the injection molding and puts the injection molding into the welding station according to a set speed until the labeling position of the injection molding is aligned and attached to the laminating label paper, meanwhile, the ultrasonic welding equipment is started, ultrasonic waves with a set frequency and welding pressure are simultaneously acted on the surface where the injection molding and the laminating label paper are attached to each other at the welding station, a certain welding time is kept, and after the welding time is timed, the welding station continues to perform ultrasonic welding on the next injection molding and the laminating label paper;
the injection molding with drench membrane label paper and adopt the same material to make, the injection molding adopts PLA, PP or BOPP material.
2. The ultrasonic welding process for the molding of injection-molded parts according to claim 1, wherein the ultrasonic welding device has a power of 1000w and a frequency of 15-20 KHZ.
3. The ultrasonic welding process for molding the injection molding part according to claim 1, wherein the laminated label paper comprises label base paper and a laminated layer, the laminated layer is formed on the label base paper in real time by the ultrasonic welding equipment before the laminated label paper is moved to a welding station, and the prepared laminated label paper is dried for a set drying time and then conveyed to the welding station of the ultrasonic welding equipment.
4. The ultrasonic welding process for molding the injection molded part according to claim 3, wherein a lifting type film coating mechanism and an adjustable drying mechanism are arranged on one side of the ultrasonic welding equipment, which is positioned at the welding station, and the adjustable drying mechanism is arranged close to the welding station.
5. The ultrasonic welding process for molding injection-molded parts according to claim 4, wherein the label base paper is formed into separable individual pieces by an automatic cutting process before entering the elevating type film coating mechanism.
6. The ultrasonic welding process for molding the injection molding part according to claim 5, wherein the ultrasonic welding equipment is provided with a hot-pressing cutting mechanism before the lifting type laminating mechanism, and breakpoint connecting lines are formed on the surface of the label base paper at intervals through the hot-pressing cutting mechanism.
7. The ultrasonic welding process for molding the injection molding part according to claim 4, wherein when the injection molding part is made of PLA material, the lifting type film covering mechanism works as follows:
pouring the prepared film coating liquid into a heat preservation groove of a lifting type film coating mechanism, setting the heat preservation temperature within the range of 190 plus-minus 195 ℃, forming a layer of film coating liquid on the surface of a coating wheel partially immersed in the heat preservation groove after rotating forward and backward for 5-10 circles, controlling the temperature of the coating wheel at 205 plus-minus 215 ℃, enabling a transfer wheel above the coating wheel to perform lifting motion to press the label base paper to be in contact with the surface of the coating wheel, and gradually forming a continuous film coating layer on one surface of the lower label base paper by pulling external force.
8. The ultrasonic welding process for molding the injection molding part according to claim 7, wherein the adjustable drying mechanism dries the laminated label paper from the lifting laminating mechanism in the following process:
firstly, drying for 3-5 minutes in a uniform motion manner under the environment of a drying temperature of 78-80 ℃, and then drying for 5-8 minutes in a uniform motion manner under the environment of a drying temperature of 63-65 ℃.
9. The ultrasonic welding process for molding injection molded parts according to claim 1, wherein a manipulator is provided on the ultrasonic welding device for grasping the injection molded parts, and the manipulator can reciprocate up and down, right and left, and turn up and down, right and left.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111457840.7A CN114055783A (en) | 2021-12-02 | 2021-12-02 | Ultrasonic welding process for injection molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111457840.7A CN114055783A (en) | 2021-12-02 | 2021-12-02 | Ultrasonic welding process for injection molding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114055783A true CN114055783A (en) | 2022-02-18 |
Family
ID=80228265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111457840.7A Pending CN114055783A (en) | 2021-12-02 | 2021-12-02 | Ultrasonic welding process for injection molding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114055783A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19604063A1 (en) * | 1995-10-02 | 1997-04-10 | Schmalbach Lubeca | Decorative pack with ultrasound seam |
| US20070175591A1 (en) * | 2004-03-09 | 2007-08-02 | Luigi Panzetti | Labelling machine with ultrasound welding device for making a tubular label made of heat-shrinking film and welding process |
| CN206568578U (en) * | 2017-03-17 | 2017-10-20 | 浙江丰明实业有限公司 | A kind of high speed coating machine |
| CN107351372A (en) * | 2017-08-08 | 2017-11-17 | 吴良盛 | A kind of automatic film covering make-up machine |
| CN108312567A (en) * | 2018-01-13 | 2018-07-24 | 青岛威德电子科技有限公司 | Automotive hub sign manufacturing method |
| CN109311236A (en) * | 2016-04-20 | 2019-02-05 | 艾利丹尼森零售信息服务公司 | The method of acoustic tag welding unit and manufacture multilayer notice label |
| US20200134408A1 (en) * | 2018-10-30 | 2020-04-30 | Avery Dennison Retail Information Services, Llc | Ultrasonically welded label systems and methods |
| CN210617333U (en) * | 2019-09-26 | 2020-05-26 | 河南嘉鸿鞋业有限公司 | Laminating equipment for shoe material leather-like negative film |
-
2021
- 2021-12-02 CN CN202111457840.7A patent/CN114055783A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19604063A1 (en) * | 1995-10-02 | 1997-04-10 | Schmalbach Lubeca | Decorative pack with ultrasound seam |
| US20070175591A1 (en) * | 2004-03-09 | 2007-08-02 | Luigi Panzetti | Labelling machine with ultrasound welding device for making a tubular label made of heat-shrinking film and welding process |
| CN109311236A (en) * | 2016-04-20 | 2019-02-05 | 艾利丹尼森零售信息服务公司 | The method of acoustic tag welding unit and manufacture multilayer notice label |
| CN206568578U (en) * | 2017-03-17 | 2017-10-20 | 浙江丰明实业有限公司 | A kind of high speed coating machine |
| CN107351372A (en) * | 2017-08-08 | 2017-11-17 | 吴良盛 | A kind of automatic film covering make-up machine |
| CN108312567A (en) * | 2018-01-13 | 2018-07-24 | 青岛威德电子科技有限公司 | Automotive hub sign manufacturing method |
| US20200134408A1 (en) * | 2018-10-30 | 2020-04-30 | Avery Dennison Retail Information Services, Llc | Ultrasonically welded label systems and methods |
| CN210617333U (en) * | 2019-09-26 | 2020-05-26 | 河南嘉鸿鞋业有限公司 | Laminating equipment for shoe material leather-like negative film |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4660354A (en) | Method of filling and sealing RF-sealable packaging containers | |
| WO2003008176A1 (en) | Biaxial stretch blow molding method and device for wide-mouthed containers | |
| JPH01503130A (en) | Thermoforming method and equipment | |
| CN208649214U (en) | The release carrier band of low temperature moulding | |
| CN102602005A (en) | Method for manufacturing PETG (polyethylene terephthalate glycol) heat-shrink film | |
| CN114055783A (en) | Ultrasonic welding process for injection molding | |
| CN104900143B (en) | A kind of logistic label and its production method | |
| US4895457A (en) | RF-sealable packaging containers | |
| KR101200248B1 (en) | Complex container manufacturing apparatus and method | |
| US4787194A (en) | RF-sealable packaging containers | |
| CN2915470Y (en) | Plastic sheet moulding machine | |
| CN210652218U (en) | Food packaging material and packaging box | |
| CN208118448U (en) | A kind of pearl cotton deep processing Cold Iron patch machine | |
| CN204759914U (en) | Novel commodity circulation label | |
| CN111590936A (en) | Production method of high-shrinkage polyolefin heat-shrinkable film | |
| CN106626324A (en) | Novel injection blow molding processing technique | |
| CN110039694A (en) | Mould internal standard preparation process and its mould internal standard | |
| CN214562880U (en) | Plastic suction device of automatic plastic suction machine | |
| CN212767267U (en) | Ejection type in-mold labeling device | |
| CN212888629U (en) | Injection mold inner labeling for firework product packaging | |
| KR20200107076A (en) | Eco-friendly coating materials for paper cups and method for manufacturing paper cups using the same | |
| CN207078388U (en) | A kind of aluminium-plastic bubble plate packing machine | |
| CN202243251U (en) | Surface treatment system for soft material products | |
| CN218701203U (en) | Reciprocating heating forming device | |
| JP2004195770A (en) | Method for producing in-mold labelled molded article, label for in-mold label molding used in the method, and in-mold labelld molded article |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |