CN121004701A - A method for 3D printing customized pet shoes and pet shoes - Google Patents

Abstract

A method for 3D printing customized pet shoes includes the steps of obtaining three-dimensional data of feet of a pet and constructing a first three-dimensional data model, outwards hollowing out the model to form a shell structure, removing a top cover, arranging a plurality of sewing holes and ventilation holes to obtain a second three-dimensional data model, carrying out Boolean difference processing on the first three-dimensional data model and the second three-dimensional data model to form a third three-dimensional data model, 3D printing out shoe tree models and combined models which correspond to the first three-dimensional data model and the third three-dimensional data model respectively, carrying out multistage turnover on the shoe tree models and the combined models to obtain corresponding male dies and female dies, assembling the male dies and the female dies, and manufacturing the pet shoes through an injection molding process. According to the method, the mold is rapidly customized through 3D printing and multistage mold turning processes, the non-gluing and integrated injection molding production of the pet shoes is realized, the limitations of high cost and long period of the traditional steel mold are broken through, key comfort structures such as arch support and ventilation holes are reserved, and personalized appearance customization can be realized.

Description

Method for customizing pet shoes through 3D printing and pet shoes

Technical Field

The application relates to the technical field of shoemaking, in particular to a method for customizing pet shoes by 3D printing and the pet shoes.

Background

With the rapid penetration of 3D printing technology in consumer, medical and industrial fields, the manufacturing requirements of personalized, small-lot, complex structures are replacing the traditional large-scale, standardized production modes. In the context of sustained warming of pet economies, the pet wear market is expanding rapidly, with ever increasing demands on functionality and comfort of pet footwear. The traditional shoe manufacturing technology has difficulty in meeting the emerging requirements of single customization, quick iteration, no toxicity and environmental protection, and 3D printing is introduced into the manufacturing process of the pet shoes, so that the manufacturing process becomes a key break for upgrading the industrial chain.

The main flow manufacturing process of the pet shoes still stays in two traditional routes of cold bonding and injection molding at present, wherein the cold bonding process depends on benzene-containing adhesives, VOC (volatile organic compounds) emission is high, the bonding strength is suddenly reduced under the low-temperature condition, the falling risk exists, the injection molding process is limited by the steel mold cost, a single set of mold is about 8000 dollars and is only suitable for a single size, CNC (computer numerical control) processing is required for fine adjustment of any size or curved surface, and the cycle is as long as 120-150 hours. In addition, the traditional mould generally loses complicated structures such as arch support, air holes and the like for facilitating the demolding, so that the comfort level of the finished product is insufficient.

In summary, a novel process based on 3D printing, capable of rapidly customizing a pet shoe mold with low cost and thoroughly discarding toxic adhesives is developed, and has very important practical significance for breaking through the technical bottleneck of the existing pet shoe manufacture. The method can eliminate environmental protection and health hidden trouble brought by the traditional process, improves comfort and safety of wearing of pets, can provide an efficient and green production paradigm for the pet article industry, promotes deep fusion and continuous innovation of the 3D printing technology in a vertical scene of a consumer product, and further promotes high-quality development of a pet economic industry chain.

Disclosure of Invention

Aiming at the technical problems of toxic benzene contained in cold bonding technology, high customization cost of injection mold and long period in the prior art, the application provides a method for customizing pet shoes by 3D printing and the pet shoes.

According to one aspect of the present invention, there is provided a method of 3D printing customized pet shoes, comprising the steps of:

s1, acquiring three-dimensional data of a pet foot, and constructing a first three-dimensional data model;

S2, forming a shell structure through outward hollowed-out operation based on the first three-dimensional data model, removing a top cover of the shell structure, and arranging a plurality of sewing holes and ventilation holes on the shell structure to obtain a second three-dimensional data model;

s3, carrying out Boolean difference set processing on the first three-dimensional data model and the second three-dimensional data model to form a third three-dimensional data model;

S4, respectively preparing a shoe tree model corresponding to the first three-dimensional data model and a combined model corresponding to the third three-dimensional data model through a 3D printing technology;

S5, turning the last model to obtain a male die, and turning the combined model to obtain a female die;

S6, assembling the male die and the female die to form an injection cavity, injecting thermoplastic polymer materials into the injection cavity, solidifying, and demolding to obtain the pet shoe.

According to the method, based on real foot type three-dimensional data of the pet, a shell structure is generated through accurate outward expansion and hollowed-out, so that the curved surface of the sole is closely attached to fine anatomical features such as arch, toe seams and the like, heat dissipation, perspiration and fabric fixation are realized through the ventilation holes and glue-free seaming holes, and the chemical stimulation and low-temperature degumming risks of a cold bonding process are thoroughly eliminated.

Preferably, the height of the upper edge of the second three-dimensional data model is lower than the top of the first three-dimensional data model. The design can enable a circle of smooth parting steps to be naturally formed between the second three-dimensional data model (shell structure) and the first three-dimensional data model (shoe tree) and serve as accurate positioning surfaces of subsequent metal molds.

Preferably, the step S2 further comprises adding a decorative pattern to the outer surface of the shell structure. The design can realize that the pattern and the shoe body are integrally formed in the 3D data stage.

Preferably, the specific step of the S4 is that the first three-dimensional data model and the third three-dimensional data model are imported into slicing software to be sliced in layers to form slicing files, and then the slicing files are imported into an LCD 3D printer to be solidified and molded layer by layer to obtain the shoe tree model and the combined model.

Further preferably, the layered layer has a thickness of 0.05-0.1mm.

The method utilizes the micrometer precision of LCD printing technology and the rapid curing characteristic of photosensitive resin to compress the mould prototype making time to about 6 hours, solves the problems of high direct printing cost and long CNC processing period of the traditional metal mould, simultaneously ensures the accurate reduction of the fine structures such as the arch curved surface of the shoe last, the sewing holes/ventilation holes and the like by high-resolution lamination forming, provides a bubble-free and deformation-free reference master mould for the subsequent mould turning process, and ensures the complete realization of the functional structure and the personalized design of the final pet shoe from the source.

Preferably, the multi-stage turnover mould at least comprises 3 stages, and the heat-resistant temperature of the turnover mould material at each stage is sequentially increased. The design ensures that the turnover mould material of each stage only bears the temperature load of the corresponding working procedure, thereby preventing the early low heat-resistant material from deforming or ablating at high temperature, and avoiding the waste performance of the later high heat-resistant material at low temperature stage, further ensuring the progressive transmission of shape and position precision and reducing the internal stress and the size deviation.

The concrete step of S5 is that silica gel turning is carried out on the shoe last model to obtain a silica gel shoe last female mold, casting wax is injected into the silica gel shoe last female mold to obtain a wax shoe last male mold, gypsum turning is carried out on the wax shoe last male mold to obtain a gypsum shoe last female mold, metal materials are injected into the gypsum shoe last female mold to obtain a metal shoe last male mold, sectional silica gel turning is carried out on the combined model to obtain a silica gel female mold I and a silica gel female mold II, the silica gel female mold I and the silica gel female mold II are combined to form a complete combined model female mold, gypsum is filled into the silica gel male mold I and the silica gel male mold II to obtain a gypsum male mold I and a gypsum female mold II, and metal is poured into the gypsum male mold I and the gypsum male mold II to obtain a metal female mold I and a metal female mold II.

According to the scheme, high-fidelity details of the 3D printing prototype are completely copied to the metal mold through a multistage turnover mold process, and the accurate sizes of arch curvature, stitching holes and ventilation holes are ensured. The sectional turnover of the combined model is to leave an openable assembly channel for the metal shoe last male die, avoid the risk that the integral female die cannot be put into or is forced to be pressed into a damaged die due to the structural interference of the shoe last male die, and simultaneously, the design can obviously improve the demolding efficiency and avoid scraping and tearing of the product during demolding.

Further preferably, the first metal die and the second metal die are provided with one or more groups of corresponding first positioning bolts and first positioning holes.

Preferably, a second positioning bolt is arranged on the metal shoe tree male die, and a second positioning hole matched with the second positioning bolt is arranged on the combined female die.

According to a second aspect of the present invention, a pet shoe is presented, made using the method of 3D printing customized pet shoes.

Compared with the prior art, the application has the following beneficial effects:

(1) The method for 3D printing customized pet shoes takes digital scanning and LCD photo-curing 3D printing as starting points, combines a multi-stage turnover mould process, simplifies the traditional multi-procedure and long-procedure mould manufacture into a continuous and rapid digital closed loop, and realizes rapid conversion from data to finished products;

(2) According to the method for 3D printing customized pet shoes, the soles and the vamps are molded at one time through injection molding, no gluing process is needed, benzene solvents are removed from the root, the reserved stitching holes of the shoe bodies can be used for mechanical stitching of subsequent fabrics, no additional chemical bonding agent is introduced, the zero emission of the full-flow VOC is realized, and the reliability is maintained in a low-temperature environment;

(3) According to the method for 3D printing customized pet shoes, disclosed by the application, complex geometric characteristics such as arch support, ventilation holes and suture holes are synchronously reserved through Boolean difference set and one-time injection molding, so that the structural simplification caused by demolding constraint of a traditional mold is avoided, and the wearing comfort and biomechanical suitability are obviously improved;

(4) According to the method for 3D printing customized pet shoes, disclosed by the application, the decorative patterns and the shoe bodies can be modeled conformally in a three-dimensional data stage, the whole process of printing, mold turning and injection molding is free of additional post-treatment, the personalized appearance of one pet and one mold is realized, and the patterns and the matrix are integrated uniformly, so that the method is wear-resistant, water-resistant and does not fade.

Drawings

The accompanying drawings are included to provide a further understanding of the embodiments and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments and together with the description serve to explain the principles of the application. Many of the intended advantages of other embodiments and embodiments will be readily appreciated as they become better understood by reference to the following detailed description. The elements of the drawings are not necessarily to scale relative to each other. Like reference numerals designate corresponding similar parts.

FIG. 1 shows a method flow diagram of 3D printing a customized pet shoe, according to one embodiment of the application;

FIG. 2 is a block diagram illustrating a last model according to an embodiment of the present application;

FIG. 3 illustrates a block diagram of a combined model in accordance with a specific embodiment of the present application;

FIG. 4 shows a block diagram of a first metal die according to an embodiment of the application;

FIG. 5 shows a block diagram of a second metal die in accordance with one embodiment of the present application;

FIG. 6 shows a schematic diagram of the male and female mold assembly according to an embodiment of the application;

fig. 7 shows a schematic diagram of a finished pet shoe according to an embodiment of the present application.

The reference numerals are as follows:

The novel shoe comprises a 1-shoe tree model, a 2-combined model, a 3-shell structure, a 4-sewing hole, 5-ventilation holes, a 6-metal female die I, a 7-metal female die II, an 8-first positioning hole and a 9-two-stage ladder structure.

Detailed Description

The application is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be noted that, for convenience of description, only the portions related to the present application are shown in the drawings.

Embodiments of the application and features of the embodiments may be combined with each other without conflict. The application will be described in detail below with reference to the drawings in connection with embodiments.

Fig. 1 is a flow chart illustrating a method of 3D printing customized pet shoes according to an embodiment of the present invention, fig. 2 is a last model manufactured according to the method, fig. 3 is a combination model manufactured according to the method, and fig. 4 and 5 are a first metal negative mold and a second metal negative mold, respectively, manufactured according to the method.

Referring to fig. 1, a method for 3D printing customized pet shoes comprises the following specific steps:

s1, acquiring three-dimensional data of a pet foot, and constructing a first three-dimensional data model;

S2, forming a shell structure 3 through outward hollowed-out operation based on the first three-dimensional data model, removing a top cover of the shell structure, arranging a plurality of sewing holes 4 and ventilation holes 5 on the shell structure, and adding decorative patterns or constructing textures on the shell structure 3 according to requirements to obtain a second three-dimensional data model;

s3, carrying out Boolean difference set processing on the first three-dimensional data model and the second three-dimensional data model to form a third three-dimensional data model;

S4, importing the first three-dimensional data model and the third three-dimensional data model into slicing software to conduct layered slicing, wherein the thickness of the layers is 0.05-0.1mm, forming slicing files, importing the slicing files into an LCD 3D printer to conduct layer-by-layer solidification molding, and obtaining a shoe tree model 1 (shown in figure 2) and a combined model 2 (shown in figure 3);

s5, turning the last model to obtain a male die, and turning the combined model to obtain a female die:

The method comprises the steps of coating a mold release agent on a shoe last mold, fixing the mold in a container, reserving a pouring gate, pouring prepared silica gel, vacuum defoaming, waiting for solidification of the silica gel to obtain a silica gel shoe last female mold with a cavity, cutting off outer layer solidified silica gel according to a W shape, taking out an inner shoe last mold, tightly closing the silica gel shoe last female mold, injecting casting wax into the reserved pouring gate, taking out the wax after cooling the wax to obtain a wax shoe last male mold, fixing the wax shoe last male mold in the container, reserving a dewaxing gate and the pouring gate, pouring gypsum into the container, transferring into a roasting furnace after defoaming is completed, letting the wax flow out to obtain a gypsum shoe last female mold, and finally injecting metal materials into the gypsum pouring gate to obtain a metal shoe last male mold;

After the mold release agent is smeared on the combined mold, half of the side surface is fixed in a container by using the oil sludge, the oil sludge is smoothed, supporting bolts are placed around the combined mold, the prepared silica gel is poured, after vacuum defoaming, the silica gel is waited for solidification, half of the silica gel turning mold is obtained, namely, a silica gel female mold I is obtained by using the same method, a silica gel female mold II is obtained by using the same method, gypsum is filled into the silica gel female mold I and the silica gel female mold II, after defoaming, the two halves of a gypsum male mold I and a gypsum male mold II are smoothed, and a metal female mold I6 (shown in figure 4) and a metal female mold II 7 (shown in figure 5) are poured on the gypsum male mold I and the gypsum male mold II.

S6, referring to FIG. 6, assembling the male die and the female die to form an injection cavity, injecting thermoplastic polymer material into the injection cavity, curing and demolding to obtain the pet shoe (shown in FIG. 7).

The method utilizes the Boolean difference set to generate the combined model once, and is matched with the LCD 3D printing technology, the prototype can be manufactured in about 6 hours, and patterns can be added, modified or the size can be finely adjusted at any time, so that low-cost personalized rapid iteration of 'one pet one model' is realized. Meanwhile, the high-precision male die and the high-precision female die which are obtained by turning the die for a plurality of times can form the reusable injection molding cavity through quick assembly of the positioning bolts/holes. The pet shoe manufactured by the method has both strength and flexibility, breaks through the bottleneck of single size, long period and high cost of the traditional steel mould, and provides a high-efficiency, green and sustainable brand new solution for small-batch flexible manufacturing of the pet shoe.

Specifically, the first metal die 6 and the second metal die 7 are provided with one or more sets of corresponding first positioning pins (not shown in the figure) and first positioning holes 8. By the jogging of the first positioning bolt and the first positioning hole 8, the two half female molds can be automatically aligned when being clamped.

In a specific embodiment, the first positioning bolt and the first positioning hole 8 can be designed into a threaded structure, and can lock the first metal female die 6 and the second metal female die 7 while achieving accurate positioning, so that the integral consistency of an injection cavity is ensured, and dislocation and flash caused by high-pressure injection are avoided.

Specifically, the metal shoe tree male die is provided with a second positioning bolt, and the combined female die is provided with a second positioning hole matched with the second positioning bolt. The second positioning bolt and the second positioning hole are additionally arranged, so that the tight fit degree between the male die and the female die can be increased, the injection molding pressure can be resisted while the positioning effect is improved, the male die is prevented from rotating or floating in the closed die cavity, and the injection molding thickness is ensured to be uniform and the hole position is ensured to be accurate.

Specifically, in step S2, the shell structure 3 is removed from the top cover to obtain a second three-dimensional data model, and the height of the upper edge of the second three-dimensional data model is lower than the top of the first three-dimensional data model, so that a two-stage stepped structure 9 is formed on the contact surface of the female die and the male die. The design can realize the effects of automatic guiding and accurate positioning during mold closing, and can form double guarantees in cooperation with the second positioning bolt and the second positioning hole, and in the high-pressure material injection stage, the secondary table top can bear lateral shearing force together, so that the dislocation of the mold is prevented, the correct positions and the structural integrity of the sewing holes and the ventilation holes are ensured, meanwhile, the injection molding flash can be prevented, the material waste is reduced, and the product quality is improved.

In a specific embodiment, decorative patterns can be directly added on the outer surface of the shell structure 3, so that the real personalized customization of 'one pet one mode' is realized, the secondary silk screen printing or labeling process is omitted, and the problems of complex process, high cost and easy pattern falling caused by the dependence on later processing in the personalized customization of the traditional pet shoes are solved. The final pattern is permanently embedded into the vamp in the form of embossment or texture, is wear-resistant and water-resistant, does not fall off or fade after long-term use, and is attractive and durable.

In a specific embodiment, after the sectional turning of the combined mold 2, a first metal female mold 6 and a second metal female mold 7 of the left half and the right half can be obtained.

In other embodiments, the combined mold may be segmented and turned to form two front and back halves of the female mold, or may be segmented to facilitate assembly of the male and female molds.

In a specific embodiment, the stitching holes 4 can be customized in shape and size to meet the stitching requirements of different fabrics, and the air holes 5 can be changed in position and size and shape on the shell structure according to the requirements, so as to meet the personalized requirements and the heat dissipation effect.

In particular embodiments, the material of the pet shoe may be rubber, TPU, TPE, or TPR. The selected materials belong to nontoxic thermoplastic elastomers, have the characteristics of flexibility, wear resistance, recoverability and easy molding of injection molding, and can completely reproduce complex details such as arch curves, ventilation holes, suture holes and the like in one-time injection molding, thereby ensuring the comfort and safety of wearing of pets, conforming to the green manufacturing concept and realizing the unification of safe, comfortable, environment-friendly and efficient production.

While the application has been described with reference to specific embodiments, the scope of the application is not limited thereto, and any changes or substitutions can be easily made by those skilled in the art within the scope of the application disclosed herein, and are intended to be covered by the scope of the application. Therefore, the protection scope of the application is subject to the protection scope of the claims.

In the description of the present application, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application. The word 'comprising' does not exclude the presence of elements or steps not listed in a claim. The word 'a' or 'an' preceding an element does not exclude the presence of a plurality of such elements. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage. Any reference signs in the claims shall not be construed as limiting the scope.

Claims (10)

1. A method of 3D printing customized pet shoes, comprising the steps of:

s1, acquiring three-dimensional data of a pet foot, and constructing a first three-dimensional data model;

S2, forming a shell structure through outward hollowed-out operation based on the first three-dimensional data model, removing a top cover of the shell structure, and arranging a plurality of sewing holes and ventilation holes on the shell structure to obtain a second three-dimensional data model;

s3, carrying out Boolean difference set processing on the first three-dimensional data model and the second three-dimensional data model to form a third three-dimensional data model;

S4, respectively preparing a shoe tree model corresponding to the first three-dimensional data model and a combined model corresponding to the third three-dimensional data model through a 3D printing technology;

s5, performing multistage turnover on the shoe tree model to obtain a male die, and performing multistage turnover on the combined model to obtain a female die;

S6, assembling the male die and the female die to form an injection cavity, injecting thermoplastic polymer materials into the injection cavity, solidifying, and demolding to obtain the pet shoe.

2. The method of 3D printing a customized pet shoe of claim 1, wherein the second three-dimensional data model has a top edge that is lower in height than the top of the first three-dimensional data model.

3. The method of 3D printing a customized pet shoe of claim 1, wherein S2 further comprises adding a decorative pattern to an outer surface of the shell structure.

4. The method for 3D printing customized pet shoes according to claim 1, wherein the specific step of S4 is to import the first three-dimensional data model and the third three-dimensional data model into slicing software to perform layered slicing to form slicing files, and then import the slicing files into an LCD 3D printer to perform layer-by-layer curing molding to obtain the last model and the combined model.

5. The method of 3D printing a customized pet shoe of claim 4, wherein the layered layer is 0.05-0.1mm thick.

6. The method of 3D printing a customized pet shoe of claim 1, wherein the multi-stage overmolding comprises at least 3 stages, and the heat resistant temperature of the overmolded material at each stage increases in sequence.

7. The method for 3D printing customized pet shoes according to claim 6, wherein the specific step of S5 is that silica gel turning is carried out on the shoe last model to obtain a silica gel shoe last female mold, casting wax is injected into the silica gel shoe last female mold to obtain a wax shoe last male mold, gypsum turning is carried out on the wax shoe last male mold to obtain a gypsum shoe last female mold, metal materials are injected into the gypsum shoe last female mold to obtain a metal shoe male mold, sectional silica gel turning is carried out on the combined model to obtain a silica gel female mold I and a silica gel female mold II, the silica gel female mold I and the silica gel female mold II are combined to form a complete combined model female mold, gypsum is filled into the silica gel male mold I and the silica gel female mold II to obtain a gypsum male mold I and a gypsum male mold II, and metal male mold I and metal female mold II are poured into the gypsum male mold I and the gypsum male mold II to obtain a metal female mold I and a metal female mold II.

8. The method of 3D printing a customized pet shoe of claim 7, wherein the first metal negative mold and the second metal negative mold are provided with one or more sets of corresponding first positioning pegs and first positioning holes.

9. The method of 3D printing customized pet shoes according to claim 1, wherein a second positioning pin is provided on the metal last male mold, and the combined female mold is provided with a second positioning hole matched with the second positioning pin.

10. A pet shoe manufactured using the method of 3D printing a customized pet shoe as claimed in any one of claims 1 to 9.