CN116118379A - Processing method of water transfer printing product based on hollowed-out parts - Google Patents
Processing method of water transfer printing product based on hollowed-out parts Download PDFInfo
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- CN116118379A CN116118379A CN202310329315.XA CN202310329315A CN116118379A CN 116118379 A CN116118379 A CN 116118379A CN 202310329315 A CN202310329315 A CN 202310329315A CN 116118379 A CN116118379 A CN 116118379A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/025—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet
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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
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
The invention relates to the technical field of film water transfer printing, and discloses a processing method of a water transfer printing product based on hollowed-out parts, which comprises the following steps: manufacturing a 3D product, manufacturing a 3D film, manufacturing hollowed holes or reserved holes, combining the film covers of the 3D product, removing the film covers, running a water transfer printing device and forming a transfer printing film; can make the water transfer printing that has the 3D product of fretwork or leaving the blank area, this water transfer printing adopts 3D product fretwork or leaving the blank area to cover and has water-soluble glue water protection layer, after this glue dries, form a safety cover, in the water transfer printing in-process, make the transfer printing membrane atress balanced, difficult emergence transfer printing membrane's damage and fold warp etc., after the water transfer printing is accomplished, use clear water to dissolve water-soluble glue water protection layer, make the water transfer printing membrane of fretwork or leaving the blank area break away from, water-soluble glue water protection layer can flexible smooth and the dissolution under the molecule/atom at the dissolving in-process, can avoid the pattern of water transfer printing membrane to produce defects such as burr, guarantee the imaging effect of water transfer printing membrane.
Description
Technical Field
The invention relates to the technical field of film water transfer printing, in particular to a processing method of a water transfer printing product based on hollowed-out parts.
Background
Currently, the water transfer printing technology is a printing technology that uses water pressure to hydrolyze polymer on transfer paper/plastic film with color patterns. Along with the improvement of the requirements of people on product packaging and decoration, the water transfer printing has wider application, and is widely applied to the fields of automobile products, electronic products, living room products, daily necessities, indoor buildings and the like.
Conventional water transfer is a well known technique for transferring color images to the surface of a three-dimensional object. The method comprises the steps of printing an ink image on a polyvinyl alcohol (PVA) film by using a traditional ink-jet printer, placing the PVA color film carrying the ink image on a water surface, spraying a chemical activator on the PVA film to soften the color PVA film so as to enable the color PVA film to be easily stretched, activating the color PVA film, slowly immersing an object to be patterned in water, and stretching the floating film after the floating film contacts the object, wrapping the surface of the object and attaching the object to the surface of the object.
In the water transfer printing processing process, the part of the product covered by the pattern is transferred with the pattern, in actual production, a plurality of products are provided with hollowed-out areas or empty areas, the areas do not need to be transferred with the pattern, the traditional mode is to fill the hollowed-out areas with a plurality of fillers, the fillers are fully distributed in the hollowed-out areas, then the water transfer printing is carried out on the fillers, and then the fillers are taken out, so that the transfer printing film is greatly damaged, burrs appear and the like; the method also has the advantages that the hollowed-out area of the transfer printing film is yielded, so that the design cost, the design time and the like of the transfer printing film are required to be increased; the method has the advantages that the masking tape is stuck to the reserved area, and is torn off after the water transfer printing is finished, but the method has the defects that after the masking tape is torn off, a plurality of burrs are formed at the edges of the patterns, so that the attractiveness of the product is affected, and the like; in addition, the water transfer printing method can influence the adhesive force between the transfer printing film and the object to be transferred, so that the transfer printing film is not durable, is not easy to use and the like.
Accordingly, for the above-described problems, the existing water transfer technique is required to be further improved.
Disclosure of Invention
The invention aims to overcome the defects of the existing water transfer printing technology: the effect of water transfer printing is not good, very easily appears deckle edge, deckle edge is uneven, very easily influences the pleasing to the eye and the use of transfer printing membrane, still can make transfer printing membrane and object very easily drop and overlap phenomenon, cause the increase of cost and result in use effect not good etc. in addition, it is that the required transfer printing membrane process of preparation is comparatively complicated and the precision requirement is higher to appear in the water transfer printing (if the fretwork area is yielded and can appear the fretwork that size and shape are different, this can make the transfer printing membrane need special production of stepping down etc.), and complicated fretwork or the water transfer printing operation of leaving aside is yielded etc..
In order to solve the technical problems, the invention provides the following technical scheme:
a processing method of a water transfer printing product based on hollowed-out parts, comprising the following steps:
step one: fabrication of 3D products
Selecting a 3D printer, and printing out a 3D product after 3D modeling input is carried out on the 3D printer; or an injection mold is selected, injection liquid is injected into the injection mold through an injection molding machine, and a 3D product is formed through cooling and solidification, wherein the 3D product is selected as a 3D product with a hollowed-out area or a 3D product with a reserved area;
step two: 3D (three-dimensional) film coating manufacture
Selecting the 3D product in the first step, manufacturing a film, and manufacturing a film matched with the 3D product according to the appearance of the 3D product, wherein the film is a complete film for wrapping the 3D product;
step three: making hollow holes or holes
Selecting a covering film in the second step, observing the shape of the covering film, selecting a 3D product in the first step, observing the shape of the covering film, selecting a hollowed-out area and a hollowed-out shape or a hollowed-out area and a hollowed-out shape, matching the hollowed-out area and the hollowed-out shape with the corresponding position of the covering film, and drilling a hollowed-out hole in the corresponding position of the covering film;
step four: film covering combination of 3D product
The third step of covering film and 3D product is selected, the covering film with hollowed-out holes is covered on the 3D product, water-soluble glue is smeared at the hollowed-out holes of the covering film, a water-soluble glue smearing area is formed at the hollowed-out parts or the reserved parts of the 3D product, the hollowed-out parts or the reserved parts of the 3D product are fully smeared with the water-soluble glue, after the hollowed-out parts or the reserved parts of the 3D product are fully smeared with the water-soluble glue, the 3D product is dried at room temperature, and a water-soluble glue protection layer is formed at the hollowed-out parts or the reserved parts of the 3D product;
step five: mantle removal
Selecting the cover film and the 3D product in the fourth step, removing the cover film, and selecting sand paper to polish the polyvinyl alcohol protection layer at the hollowed-out part or the reserved part of the 3D product so as to ensure that the polyvinyl alcohol protection layer at the hollowed-out part or the reserved part meets the protection layer requirement of the hollowed-out part or the reserved part of the 3D product;
step six: operation of the Water transfer device
Selecting a square device support, installing a transverse sliding rod on the square device support, installing a sliding manipulator on the transverse sliding rod, selecting a sucker manipulator which moves in a three-dimensional space and rotates freely, arranging a water tank and an objective table below the square device support, accommodating water and a transfer film in the water tank, accommodating a 3D product in the fifth step on the objective table, sliding the manipulator above the objective table on the transverse sliding rod, moving down and rotating freely to ensure that the 3D product in the fifth step is clamped stably, lifting the manipulator and sliding the manipulator above the transfer film, slowly lowering the manipulator, and uniformly attaching the 3D product in the fifth step to the transfer film, lifting the manipulator after transfer is completed, and conveying the 3D product in the fifth step to the objective table;
step seven: transfer film forming
And D, selecting the 3D product in the step six, airing and solidifying the transfer film at room temperature, putting the 3D product into purified water, cleaning the 3D product by using the purified water, dissolving the polyvinyl alcohol protective layer at the hollowed-out part or the reserved part on the 3D product by water, and taking away the transfer film on the dissolved polyvinyl alcohol protective layer, so as to form the final 3D product.
Further, the water-soluble glue is water-soluble polyvinyl alcohol glue or water-soluble polyvinyl alcohol glue added with additives; the additives are selected from phenolic additives which are used for enhancing the hydrophilicity of the water-soluble polyvinyl alcohol glue, so that the dissolution rate of the water-soluble polyvinyl alcohol glue is accelerated.
Further, the water-soluble polyvinyl alcohol glue is a viscous aqueous solution of polyvinyl alcohol resin, and the water-soluble polyvinyl alcohol is a polar-OH group with high density, and can be combined with water to be dissolved.
Further, the additive in the water-soluble polyvinyl alcohol glue added with the additive is selected from phenol (carbolic acid), catechol (catechol) or pyrogallol (pyrogallol).
Further, for the additive-free water-soluble polyvinyl alcohol glue, the polymerization degree of the water-soluble polyvinyl alcohol glue is selected to be 500-2600.
Further, for the additive-free water-soluble polyvinyl alcohol glue, the alcoholysis degree of the water-soluble polyvinyl alcohol glue is 86% -90%.
Further, for the water-soluble polyvinyl alcohol glue without additives, the solid content of the water-soluble polyvinyl alcohol glue is 10% -30%.
Further, the thickness of the polyvinyl alcohol protective layer is 5-40 μm.
Further, the moisture content of the polyvinyl alcohol protective layer after being dried is 0-50%.
Further, the cover film is a plastic film, a metal film or a gypsum film.
Advantageous effects
The invention carries out water transfer printing on the 3D product in the hollowed-out or hollow area, and the effective water transfer printing of the 3D product in the hollowed-out or hollow area can be realized by adopting the technological process of the figure 1; the water-soluble glue protective layer is covered on the hollowed or left area of the 3D product, after the glue is dried, a protective cover can be formed, in the water transfer process, the stress of the transfer film is balanced, the damage, the fold deformation and the like of the transfer film are not easy to occur, after the water transfer is finished and the transfer film is dried, the clear water is used for dissolving the water-soluble glue protective layer, so that the water transfer film in the hollowed or left area is separated, meanwhile, the water-soluble glue protective layer can be flexibly and smoothly dissolved and dissolved under the molecular/atomic conditions in the dissolving process, the defects of burrs, burrs and the like generated by patterns of the water transfer film can be avoided, and the imaging effect of the water transfer film is ensured; and the water-soluble adhesive has the advantages that the water-soluble adhesive can realize the affinity of different water-soluble adhesives to water by adopting the presence or absence of additives and additive types, so that the imaging effect of the water transfer film is more optimized, and the like. The method can be widely applied to water transfer printing production.
Drawings
Fig. 1 is a schematic flow chart of a processing method of a water transfer printing product based on hollowed-out parts.
Fig. 2 is a schematic diagram of a 3D product to be water-transferred according to the processing method of the water-transferred product based on hollowed-out parts.
Fig. 3 is a schematic diagram of a 3D product after water transfer according to the processing method of the hollow-out-based water transfer product of the present invention.
Fig. 4 is a schematic diagram of a 3D product of the processing method of the hollow-out-based water transfer product according to the present invention.
Fig. 5 is a schematic equipment structure diagram of a processing method of a water transfer printing product based on hollowed-out parts.
Fig. 6 is a schematic diagram showing hydrophilicity of polyvinyl alcohol dry films of different additives in the processing method of the hollow-out-based water transfer printing product.
Description of the drawings: 01. transferring the 3D product to be water; 02. a hollowed-out area; 03. a transfer film; 04. a 3D product; 05. square device support; 06. a water tank; 07. a transverse slide bar; 08. and a sliding manipulator.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the present invention, the term "plurality" means two or more. "and/or": the association relationship describing the association object may represent that there are three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.
Referring to fig. 1-6, a processing method of a water transfer printing product based on hollowed-out parts (shown in fig. 1) includes the following steps:
step one: fabrication of 3D products
Selecting a 3D printer, and printing out a 3D product after 3D modeling input is carried out on the 3D printer; or an injection mold is selected, injection liquid is injected into the injection mold through an injection molding machine, and is cooled and solidified to form a 3D product, as shown in fig. 2, the 3D product is selected as a 3D product with a hollowed-out area or a 3D product with a hollowed-out area, as shown in fig. 4, and the 3D product is a 3D product 01 to be subjected to water transfer printing and a hollowed-out area 02;
step two: 3D (three-dimensional) film coating manufacture
Selecting the 3D product in the first step, manufacturing a film matched with the 3D product according to the appearance of the 3D product, and selecting a complete film for wrapping the 3D product by the film;
step three: making hollow holes or holes
Selecting the covering film in the second step, observing the shape of the covering film, selecting the 3D product in the first step, observing the shape of the covering film, selecting a hollowed-out area and a hollowed-out shape or a hollowed-out area and a hollowed-out shape, matching the hollowed-out area and the hollowed-out shape with the corresponding position of the covering film, and drilling a hollowed-out hole in the corresponding position of the covering film;
step four: film covering combination of 3D product
The third step of covering film and 3D product, covering the covering film with hollowed-out holes on the 3D product, coating water-soluble glue on the hollowed-out holes of the covering film, forming a water-soluble glue coating area on the hollowed-out parts or the reserved parts of the 3D product, coating the hollowed-out parts or the reserved parts of the 3D product with the water-soluble glue, airing at room temperature after the hollowed-out parts or the reserved parts of the 3D product are coated with the water-soluble glue, and forming a water-soluble glue protection layer on the hollowed-out parts or the reserved parts of the 3D product;
step five: mantle removal
Selecting the cover film and the 3D product in the fourth step, removing the cover film, and selecting sand paper to polish the polyvinyl alcohol protection layer at the hollowed-out part or the reserved part of the 3D product so as to ensure that the polyvinyl alcohol protection layer at the hollowed-out part or the reserved part meets the protection layer requirement of the hollowed-out part or the reserved part of the 3D product;
step six: operation of the Water transfer device
Referring to fig. 5, a square device support 05 is selected, a lateral sliding rod 07 is mounted on the square device support 05, a sliding manipulator 08 is mounted on the lateral sliding rod 07, the sliding manipulator 08 selects a sucker manipulator which moves in three-dimensional space and rotates freely, a three-jaw manipulator is further mounted on the sucker manipulator, a water tank 06 and an objective table 09 are arranged below the square device support 05, water and a transfer film 03 are contained in the water tank 06, a 3D product 04 in the step five is contained on the objective table 09, the sliding manipulator 08 slides to the upper side of the objective table 09 on the lateral sliding rod 07, the sliding manipulator 08 moves downwards and rotates freely to ensure that the 3D product 04 in the step five is clamped stably, the sliding manipulator 08 is lifted and slides to the upper side of the transfer film 03, the sliding manipulator 08 is slowly lowered, the 3D product 04 in the step five is uniformly attached to the transfer film 03, and after transfer is completed, the sliding manipulator 08 is lifted, and the 3D product in the step five is sent to the objective table 09;
step seven: transfer film forming
And D, selecting the 3D product in the step six, airing and solidifying the transfer film at room temperature, putting the 3D product into purified water, cleaning the 3D product by using the purified water, dissolving the polyvinyl alcohol protective layer at the hollowed-out part or the reserved part on the 3D product by water, and taking away the transfer film on the dissolved polyvinyl alcohol protective layer, so as to form the final 3D product.
Wherein, the mantle is a gypsum film.
The experiments were performed on water-soluble glues as follows:
1. the water-soluble glue is water-soluble polyvinyl alcohol glue, and the preparation process is as follows: selecting 80 parts of pure water according to parts by weight, heating the pure water to 90 ℃, slowly adding 20 parts of polyvinyl alcohol resin into the pure water, stirring and dissolving the polyvinyl alcohol resin at a constant speed, and preparing an aqueous solution of water-soluble polyvinyl alcohol glue after two hours;
2. the water-soluble glue is water-soluble polyvinyl alcohol glue added with phenol, and the preparation process is as follows: selecting 80 parts of pure water according to parts by weight, heating the pure water to 90 ℃, then slowly adding 20 parts of polyvinyl alcohol resin into the pure water, stirring and dissolving the pure water at a constant speed, preparing an aqueous solution of water-soluble polyvinyl alcohol glue after two hours, adding 3 parts of phenol additive into the aqueous solution of water-soluble polyvinyl alcohol glue, and stirring the aqueous solution of water-soluble polyvinyl alcohol glue at room temperature for two hours to prepare the water-soluble polyvinyl alcohol glue added with phenol;
3. the water-soluble glue is water-soluble polyvinyl alcohol glue added with catechol, and the preparation process is as follows: selecting 80 parts of pure water according to parts by weight, heating the pure water to 90 ℃, then slowly adding 20 parts of polyvinyl alcohol resin into the pure water, stirring and dissolving the pure water at a constant speed, preparing an aqueous solution of water-soluble polyvinyl alcohol glue after two hours, adding 3 parts of catechol additive into the aqueous solution of water-soluble polyvinyl alcohol glue, and stirring the mixture at room temperature for two hours to prepare the water-soluble polyvinyl alcohol glue added with catechol;
4. the water-soluble glue is water-soluble polyvinyl alcohol glue added with pyrogallol, and the preparation process is as follows: according to the mass portion, 80 portions of pure water are selected, heated to 90 ℃, then 20 portions of polyvinyl alcohol resin are slowly added into the pure water, and uniformly stirred and dissolved, after two hours, an aqueous solution of water-soluble polyvinyl alcohol glue is prepared, then 3 portions of pyrogallol additive are added into the aqueous solution of water-soluble polyvinyl alcohol glue, and stirring is carried out at room temperature for two hours, thus preparing the water-soluble polyvinyl alcohol glue added with pyrogallol.
The four water-soluble glues are selected: the water-soluble polyvinyl alcohol glue (one), the water-soluble polyvinyl alcohol glue (two) added with phenol, the water-soluble polyvinyl alcohol glue (three) added with catechol and the water-soluble polyvinyl alcohol glue (four) added with pyrogallol are respectively smeared on a 3D product with a hollowed-out area or a reserved area, are subjected to glue drying, and then hydrophilic measurement is carried out on the dried four kinds of glue, and referring to fig. 6, it can be found that: the contact angle of the water-soluble polyvinyl alcohol glue (I) is 82.3 degrees, the contact angle of the water-soluble polyvinyl alcohol glue (II) added with phenol is 75.4 degrees, the contact angle of the water-soluble polyvinyl alcohol glue (III) added with catechol is 61.8 degrees, and the contact angle of the water-soluble polyvinyl alcohol glue (IV) added with pyrogallol is 49.6 degrees, the smaller the contact angle, the stronger the hydrophilicity, and the easier the water-soluble polyvinyl alcohol glue (II) added with catechol is used as a protective layer for rapid hydrolysis.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The processing method of the water transfer printing product based on the hollowed-out is characterized by comprising the following steps of:
step one: fabrication of 3D products
Selecting a 3D printer, and printing out a 3D product after 3D modeling input is carried out on the 3D printer; or an injection mold is selected, injection liquid is injected into the injection mold through an injection molding machine, and a 3D product is formed through cooling and solidification, wherein the 3D product is selected as a 3D product with a hollowed-out area or a 3D product with a reserved area;
step two: 3D (three-dimensional) film coating manufacture
Selecting the 3D product in the first step, manufacturing a film, and manufacturing a film matched with the 3D product according to the appearance of the 3D product, wherein the film is a complete film for wrapping the 3D product;
step three: making hollow holes or holes
Selecting a covering film in the second step, observing the shape of the covering film, selecting a 3D product in the first step, observing the shape of the covering film, selecting a hollowed-out area and a hollowed-out shape or a hollowed-out area and a hollowed-out shape, matching the hollowed-out area and the hollowed-out shape with the corresponding position of the covering film, and drilling a hollowed-out hole in the corresponding position of the covering film;
step four: film covering combination of 3D product
The third step of covering film and 3D product is selected, the covering film with hollowed-out holes is covered on the 3D product, water-soluble glue is smeared at the hollowed-out holes of the covering film, a water-soluble glue smearing area is formed at the hollowed-out parts or the reserved parts of the 3D product, the hollowed-out parts or the reserved parts of the 3D product are fully smeared with the water-soluble glue, after the hollowed-out parts or the reserved parts of the 3D product are fully smeared with the water-soluble glue, the 3D product is dried at room temperature, and a water-soluble glue protection layer is formed at the hollowed-out parts or the reserved parts of the 3D product;
step five: mantle removal
Selecting the cover film and the 3D product in the fourth step, removing the cover film, and selecting sand paper to polish the polyvinyl alcohol protection layer at the hollowed-out part or the reserved part of the 3D product so as to ensure that the polyvinyl alcohol protection layer at the hollowed-out part or the reserved part meets the protection layer requirement of the hollowed-out part or the reserved part of the 3D product;
step six: operation of the Water transfer device
Selecting a square device support, installing a transverse sliding rod on the square device support, installing a sliding manipulator on the transverse sliding rod, selecting a sucker manipulator which moves in a three-dimensional space and rotates freely, arranging a water tank and an objective table below the square device support, accommodating water and a transfer film in the water tank, accommodating a 3D product in the fifth step on the objective table, sliding the manipulator above the objective table on the transverse sliding rod, moving down and rotating freely to ensure that the 3D product in the fifth step is clamped stably, lifting the manipulator and sliding the manipulator above the transfer film, slowly lowering the manipulator, and uniformly attaching the 3D product in the fifth step to the transfer film, lifting the manipulator after transfer is completed, and conveying the 3D product in the fifth step to the objective table;
step seven: transfer film forming
And D, selecting the 3D product in the step six, airing and solidifying the transfer film at room temperature, putting the 3D product into purified water, cleaning the 3D product by using the purified water, dissolving the polyvinyl alcohol protective layer at the hollowed-out part or the reserved part on the 3D product by water, and taking away the transfer film on the dissolved polyvinyl alcohol protective layer, so as to form the final 3D product.
2. The processing method of the hollowed-out water transfer printing product according to claim 1, wherein the water-soluble glue is water-soluble polyvinyl alcohol glue or water-soluble polyvinyl alcohol glue added with additives.
3. The method for processing a hollowed-out water transfer printing product according to claim 2, wherein the water-soluble polyvinyl alcohol glue is a viscous aqueous solution of polyvinyl alcohol resin.
4. The method for processing a hollowed-out water transfer printing product according to claim 2, wherein the additive in the water-soluble polyvinyl alcohol glue added with the additive is phenol, catechol or pyrogallol.
5. The method for processing a hollow-out-based water transfer printing product according to claim 3, wherein the polymerization degree of the polyvinyl alcohol glue is 500-2600.
6. The method for processing a hollowed-out water transfer printing product according to claim 3, wherein the alcoholysis degree of the polyvinyl alcohol glue is 86% -90%.
7. The method for processing a hollowed-out water transfer printing product according to claim 3, wherein the solid content of the water-soluble polyvinyl alcohol glue is 10% -30%.
8. A method of processing a hollowed-out water transfer printing product according to claim 3, wherein the thickness of the polyvinyl alcohol protective layer is 5-40 μm.
9. The method for processing a hollowed-out water transfer printing product according to claim 3, wherein the moisture content of the polyvinyl alcohol protective layer after airing is 0-50%.
10. The method for processing a hollowed-out water transfer printing product according to claim 1, wherein the cover film is a plastic film, a metal film or a gypsum film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310329315.XA CN116118379A (en) | 2023-03-30 | 2023-03-30 | Processing method of water transfer printing product based on hollowed-out parts |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310329315.XA CN116118379A (en) | 2023-03-30 | 2023-03-30 | Processing method of water transfer printing product based on hollowed-out parts |
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| CN116118379A true CN116118379A (en) | 2023-05-16 |
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- 2023-03-30 CN CN202310329315.XA patent/CN116118379A/en active Pending
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