Methods for manufacturing auxiliary tools, and methods for drawing reference lines for shoe openings.

Abstract

This application provides a method for manufacturing an auxiliary tool, an auxiliary tool, and a method for drawing shoe opening reference lines, relating to the field of shoemaking technology. The auxiliary tool manufacturing method includes: obtaining a preset shoe last; scanning the shoe last to construct a first virtual model; obtaining a preset shoe opening reference line and marking reference line positioning points on the first virtual model; creating a second virtual model based on the positioning points; and manufacturing an auxiliary tool based on the second virtual model. This application can draw precise shoe opening auxiliary lines on the shoe last, is simple to operate, reduces manual workload, and is reusable, improving resource utilization.

Description

TECHNICAL FIELD

[0001] The present application relates to the shoe manufacturing technical field, and particularly relates to an auxiliary tool manufacturing method, an auxiliary tool and a shoe opening reference line drawing method. BACKGROUND

[0002] Drawing a shoe opening reference line on a shoe last is an important process in the shoe manufacturing process. The existing shoe opening reference line drawing methods are mainly as follows: one is to connect position points on the shoe last into a line by manual drawing to form a shoe opening reference line. The other is to use a vacuum suction device to adsorb a suction material on the shoe last, draw a line manually after shaping, and then cut it into a sleeve mold manually, which is used repeatedly subsequently. However, the first method has high requirements for the operator, has a large amount of work, and has problems such as measurement error and unsmooth and unattractive hand-drawn lines. The suction material in the second method is soft and easy to deform, and is prone to misalignment after being used for many times. Therefore, the present application provides an auxiliary tool manufacturing method, an auxiliary tool and a shoe opening reference line drawing method. SUMMARY

[0003] Therefore, the present application provides an auxiliary tool manufacturing method, an auxiliary tool and a shoe opening reference line drawing method, which aims to solve the technical problems of complicated and unstable shoe opening reference line drawing in the prior art.

[0004] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows:

[0005] In a first aspect, an auxiliary tool manufacturing method is provided, comprising:

[0006] acquiring a preset shoe last;

[0007] scanning the shoe last to construct a first virtual model;

[0008] acquiring a preset shoe opening reference line and marking a reference line positioning point on the first virtual model;

[0009] manufacturing a second virtual model according to the positioning point;

[0010] manufacturing an auxiliary tool according to the second virtual model.

[0011] In one embodiment of the first aspect, the scanning of the shoe last to construct a first virtual model comprises:

[0012] a laser scanner scans a feature area of the shoe last and transmits scanning information to a processing computer, and the processing computer constructs a first virtual model according to the scanning information.

[0013] In one of the embodiments of the first aspect, the feature area includes at least one of the following areas: a front tip, a rear root, a instep, a waist, a counter, a bottom.

[0014] In one of the embodiments of the first aspect, the scanning the shoe tree and constructing the first virtual model further includes:

[0015] Meanwhile, a plurality of the shoe trees are scanned and the first virtual models corresponding to different shoe trees are constructed respectively to form a shoe tree model set.

[0016] In one of the embodiments of the first aspect, the positioning points include a back counter height control point, an outer waist height control point, a instep outer waist turning point, a instep depth control point, a instep inner waist turning point and a instep inner waist height point.

[0017] In one of the embodiments of the first aspect, the manufacturing the auxiliary tool according to the second virtual model includes:

[0018] The printing material is put into a printing device, the parameters of the second virtual model are imported into the printing device, the printing device performs layer printing according to the parameters of the second virtual model to obtain the auxiliary tool.

[0019] In the second aspect, the embodiments of the present application further provide an auxiliary tool manufactured by the auxiliary tool manufacturing method in any of the above embodiments.

[0020] In one of the embodiments of the second aspect, the auxiliary tool includes a first opening and a second opening, and the first opening and the second opening are used to set the auxiliary tool on a shoe tree.

[0021] In one of the embodiments of the second aspect, the edge line of the second opening coincides with the instep reference line of the shoe tree.

[0022] In the third aspect, the embodiments of the present application further provide an instep reference line drawing method, which uses the auxiliary tool in any of the above embodiments to set the auxiliary tool on a shoe tree and draw an instep reference line on the shoe tree along the edge of the second opening.

[0023] Compared to existing technologies, the advantages of this application are as follows: This application provides a method for manufacturing an auxiliary tool, an auxiliary tool, and a method for drawing shoe opening reference lines, which can be used for drawing shoe opening reference lines in the shoe manufacturing process. This application constructs a first virtual model of the shoe last by pre-scanning shoe last parameters, marks shoe opening reference line positioning points on the first virtual model, and connects them sequentially to form a closed curve. A second virtual model of the auxiliary tool is then constructed in the system and printed. This application uses printing technology to print out the auxiliary tool for drawing shoe opening reference lines. In subsequent use, simply place the auxiliary tool on the shoe last and trace along the edge of the auxiliary tool to draw accurate shoe opening reference lines on the shoe last. The operation is simple, reduces manual workload, and is reusable, improving resource utilization. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A flowchart illustrating the auxiliary tool manufacturing method in some embodiments of this application is shown;

[0026] Figure 2 The following are schematic diagrams illustrating the structure of the shoe last in some embodiments of this application;

[0027] Figure 3 The following are schematic diagrams illustrating the structure of the shoe opening reference line in some embodiments of this application;

[0028] Figure 4 The following are schematic diagrams illustrating the model generation of auxiliary tools in some embodiments of this application;

[0029] Figure 5 The diagram shows the structure of the auxiliary tool in some embodiments of this application.

[0030] Explanation of key component symbols:

[0031] 100 - Auxiliary tools; 110 - First opening; 120 - Second opening;

[0032] 200 - Shoe last; 210 - Toe section; 220 - Heel section; 230 - Opening section; 240 - Waist area; 250 - Back of the last; 260 - Shoe ridge;

[0033] 300 - Shoe opening reference line; A - Heel height control point; B - Outer waist height control point; C - Outer waist turning point of shoe opening; D - Shoe opening depth control point; E - Inner waist turning point of shoe opening; F - Inner waist height point of shoe opening. Detailed Implementation

[0034] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0035] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0037] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0038] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0039] In the production of women's low-cut shoes, the quality of the shoes hinges on the aesthetics of the shoe opening and the accuracy of the technical parameters at various points within the opening. An effective way to ensure consistency between mass-produced products and design samples is to draw reference lines on the shoe last, matching the design sample. This allows for production according to these reference lines during upper molding, guaranteeing the quality of mass-produced products. However, the shoe last is an irregular three-dimensional curved surface, making it difficult to draw standardized reference lines. Furthermore, mass-produced shoe lasts are numerous and vary in size. Drawing lines on each shoe last is an enormous workload.

[0040] The inventors of this application have discovered that in existing methods for drawing reference lines for shoe openings, two main approaches are used: one involves manually measuring multiple key points and then drawing them by hand to connect them into a reference line. The other method uses vacuum forming equipment to adhere material to a shoe last, which is then cooled and shaped before being drawn by hand. A mold is then hand-cut and used to draw the shoe opening line on multiple lasts. However, neither method can fully guarantee the accuracy of the reference line. Inaccurate reference lines can affect the quality of the entire batch of products, posing a significant risk. In the first method, each shoe last requires manual measurement, marking, and drawing, resulting in a large workload and measurement errors, leading to uneven and unattractive hand-drawn lines. In the second method, the vacuum forming material is soft and easily deformed, and the hand-cutting process results in uneven and unattractive hand-drawn lines. While convenient and time-saving, the material is prone to misalignment when drawing lines on the last.

[0041] Therefore, this application provides a method for manufacturing an auxiliary tool 100, and a method for drawing the auxiliary tool 100 and a shoe opening reference line 300, which can be used for drawing the shoe opening reference line 300. The method for manufacturing the auxiliary tool 100 and the method for drawing the shoe opening reference line 300 provided by this application are simple to operate, can reduce manual workload, and can be reused, thus improving resource utilization.

[0042] like Figure 1 As shown, an embodiment of this application provides a method for manufacturing an auxiliary tool 100, including:

[0043] S10, obtain preset shoe last 200.

[0044] Different sizes of shoe lasts 200 can be obtained in advance, and the shoe lasts 200 can be obtained by purchasing or custom ordering. Each shoe last 200 can correspond to a shoe size, which can be used to produce finished shoes of different foot sizes.

[0045] S20, scan shoe last 200 to construct the first virtual model.

[0046] In some embodiments, step S20 includes:

[0047] A laser scanner can be used to scan the feature areas of the shoe last 200, and the scanned information is sent to a processing computer, which then constructs a first virtual model based on the scanned information.

[0048] The laser scanner uses laser light for ranging and is equipped with a reflective target, along with an angle measuring mechanism that rotates around multiple axes, forming a complete spherical coordinate measurement system. It can be used to measure stationary targets, track and measure moving targets, or combinations thereof. A processing computer is electrically connected to the laser scanner to obtain the object parameters scanned by the laser scanner. The processing computer is pre-installed with relevant processing programs, such as 3D modeling software, to construct a first virtual model after obtaining the relevant parameter information.

[0049] Combined Figure 2 As shown, in some embodiments, the feature region includes at least one of the following regions: the front tip 210, the rear root 220, the mouth 230, the waist dimple 240, the back of the last 250, and the bottom ridge 260.

[0050] The shoe last 200 can be a wooden, plastic, or aluminum last. Specifically, the toe section 210 corresponds to the toe area, the heel section to the heel area, the opening 230 to the ankle area, the arch 240 to the arch area, the back 250 to the instep area, and the sole 260 to the edge of the foot. When scanning the shoe last 200, the above-mentioned parts can be selected as reference scanning areas, but are not limited to these parts. Parameters such as the forefoot and heel lift, metatarsal girth, and instep girth of the shoe last 200 can also be selected.

[0051] The distance between the toe section 210 and the heel section is the sole length of the shoe last 200. The length of the shoe last 200 satisfies: sole length = foot length + allowance - rear tolerance. Foot length is the basis for determining shoe size and also the basis for designing the sole length of the shoe last 200. However, regardless of the structure or style of the shoe last 200, its sole length must be greater than the foot length. This is because foot length often varies depending on climate and the intensity of labor. The change in foot length due to thermal expansion and contraction caused by climate changes is generally 3-5mm. Foot length also increases when a person engages in heavy physical labor or walks for extended periods. When walking, the foot must have a certain amount of room to move within the shoe, called "allowance." Generally, the allowance for a plain-toe shoe last 200 is 20mm for men and 16.5mm for women. Furthermore, the allowance varies with the shape of the toe box. Generally, the smaller the toe shape, the sharper and narrower the toe section 210, and the greater the allowance for the toe section 210; conversely, the larger the toe shape, the thicker and wider the toe section 210, and the smaller the allowance. The heel of the shoe last 200 should have an appropriate convexity, i.e., back tolerance, to adapt to the curvature of the heel, so that the leather shoe can fit better.

[0052] In addition, the appropriate foot length can be matched according to the instep and groin circumference of the shoe last 200.

[0053] In some embodiments, step S20 further includes:

[0054] At the same time, multiple shoe lasts 200 are scanned, and a first virtual model corresponding to each shoe last 200 is constructed to form a shoe last 200 model set.

[0055] Since different sizes of shoe lasts 200 correspond to different foot shapes, parameter information of multiple shoe lasts 200 can be obtained during the initial scanning process, and different first virtual models can be constructed and stored to form a shoe last 200 model set. When it is necessary to generate shoes for different foot shapes, only the corresponding shoe last 200 model needs to be retrieved for subsequent auxiliary tool 100 preparation.

[0056] S30, obtain the preset shoe opening reference line 300, and mark the reference line positioning point on the first virtual model.

[0057] Combined Figure 2 and Figure 3 As shown, the shoe opening reference line 300 is an important parameter for generating women's low-cut shoes, ensuring a properly sized shoe opening. The reference line's positioning points include the back heel height control point A, the outer waist height control point B, the outer waist inflection point C, the shoe opening depth control point D, the inner waist inflection point E, and the inner waist height point F.

[0058] The computer's internal program can calculate the optimal positioning points based on the dimensions of different shoe lasts 200, and then mark the back heel height control point A, outer waist height control point B, shoe opening outer waist turning point C, shoe opening depth control point D, shoe opening inner waist turning point E, and shoe opening inner waist height point F on the first virtual model in sequence. Then, the line tool is used to connect each point in sequence to form a closed-loop simulated shoe opening reference line 300.

[0059] S40, create a second virtual model based on the positioning points.

[0060] The computer then uses 3D modeling software to construct a second virtual model of the auxiliary tool 100 along the simulated shoe opening reference line 300 and the outer surface of the first virtual model.

[0061] Understandably, the auxiliary tool 100 for different sizes of shoe lasts 200 will also be different in size, and can correspond to different specifications of the second virtual model.

[0062] S50, manufacture auxiliary tool 100 based on the second virtual model.

[0063] Combined Figure 4 and Figure 5 As shown, in some embodiments, step S50 includes:

[0064] The auxiliary tool 100 is manufactured using 3D printing technology. 3D printing is a type of rapid prototyping technology, also known as additive manufacturing. It is a technology that uses digital model files as a basis and employs powdered metal or plastic and other bondable materials to construct objects by printing layer by layer.

[0065] Specifically, the printing material is placed into the printing equipment, the parameters of the second virtual model are imported into the printing equipment, the printing equipment can obtain the cross-sectional information of the second virtual model, and these cross-sections are printed layer by layer with liquid, powder or sheet material. Then, the cross-sections are glued together in various ways to create a solid, and finally the auxiliary tool 100 is obtained.

[0066] The embodiments of this application also provide an auxiliary tool 100, which is manufactured by the auxiliary tool 100 manufacturing method in any of the above embodiments.

[0067] The auxiliary tool 100 manufactured by the above method can be fitted onto the corresponding shoe last 200 during the shoemaking process, and lines can be drawn along the edge of the auxiliary tool 100 to form a shoe opening reference line 300, thereby improving the preparation accuracy of the shoe opening and improving the product quality.

[0068] like Figure 5As shown, in some embodiments, the auxiliary tool 100 includes a first opening 110 and a second opening 120, which are used to fit the auxiliary tool 100 onto the shoe last 200.

[0069] With the first opening 110 and the second opening 120, the auxiliary tool 100 can be properly fitted onto the corresponding shoe last 200. The area of ​​the second opening 120 is larger than that of the first opening 110. In use, the first opening 110 is fitted onto the opening 230 of the shoe last 200, and the second opening 120 is fitted onto the back 250 of the shoe last 200.

[0070] In some embodiments, the edge of the second opening 120 coincides with the shoe opening reference line 300 of the shoe last 200.

[0071] After the auxiliary tool 100 is fully fitted onto the shoe last 200, the edge line of its second opening 120 becomes the optimal shoe opening reference line 300 for the desired shoe. The edge line of the second opening 120 sequentially connects the heel height control point A, the outer waist height control point B, the outer waist turning point C, the shoe opening depth control point D, the inner waist turning point E, and the inner waist height point F of the shoe opening reference line 300. By tracing the edge line of the second opening 120 on the shoe last 200, a closed-loop shoe opening reference line 300 can be obtained. Compared with manual measurement in existing technologies, the data measurement accuracy can be controlled within 0.2mm, significantly improving accuracy. Compared with vacuum forming molds, the fitting accuracy between the auxiliary tool 100 and the shoe last 200 is even higher, controllable within 0.2mm.

[0072] The embodiments of this application also provide a method for drawing a shoe opening reference line 300. Using the auxiliary tool 100 in any of the above embodiments, the auxiliary tool 100 is placed on the shoe last 200, and the shoe opening reference line 300 is drawn on the shoe last 200 along the edge of the second opening 120.

[0073] After the prepared auxiliary tool 100 is fitted onto the corresponding shoe last 200, the auxiliary tool 100 is adjusted so that its inner wall completely fits the outer wall of the shoe last 200. Then, an oil-based pen is used to trace the edge of the second opening 120 of the auxiliary tool 100, forming a shoe opening reference line 300 on the shoe last 200. During the shoe-making process, after the shoe upper is fitted onto the shoe last 200, it is cut along the shoe opening reference line 300 to obtain a shoe opening of the appropriate size. This ensures that batch products maintain uniform specifications and improves overall quality.

[0074] In summary, the manufacturing method of the auxiliary tool 100, the method for drawing the auxiliary tool 100 and the shoe opening reference line 300 provided in this application can significantly improve the product quality of women's low-cut shoes.

[0075] By using digital technology, key technical parameters such as the heel height control point A, outer waist height control point B, outer waist turning point C, shoe opening depth control point D, inner waist turning point E, and inner waist height of the shoe opening can be accurately captured on the computer. Compared with manual measurement in existing technologies, the data measurement accuracy can be controlled within 0.2mm, and the accuracy is greatly improved.

[0076] The simulated shoe opening reference line 300 prepared using 3D drawing software has smooth lines. Therefore, when drawing lines along the edge of the auxiliary tool 100, a smooth shoe opening reference line 300 can be obtained, which can solve the shortcomings of the shoe opening reference line 300 being uneven and unsightly, and improve the quality of the finished shoe.

[0077] The auxiliary tool 100, created using 3D drawing software, has a higher fitting accuracy with the shoe last 200, which can be controlled within 0.2mm. This solves the problem of the auxiliary tool 100 not fitting the curved surface of the shoe last 200 in the prior art.

[0078] The auxiliary tool 100, which uses 3D printing technology to print hard materials, can effectively solve the shortcomings of the auxiliary tool 100 in the existing technology, which is prone to deformation and misalignment.

[0079] The auxiliary tool 100 provided in this application can quickly position itself on the shoe last 200 without any positional shift. Its technical parameters are accurate, which can effectively solve the shortcomings of existing technologies in mass production where drawing lines is time-consuming and the positioning is inaccurate.

[0080] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0081] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A method for manufacturing an auxiliary tool, characterized in that, include: Get the preset shoe last; Scan the shoe last to construct a first virtual model; The step of scanning the shoe last and constructing a first virtual model includes: a laser scanner scanning the feature areas of the shoe last and transmitting the scanned information to a processing computer, wherein the processing computer constructs a first virtual model based on the scanned information; the feature areas include at least one of the following areas: the toe area, the heel area, the toe box area, the waist area, the back of the last, and the sole edge area. Obtain a preset shoe opening reference line, and mark the reference line positioning points on the first virtual model. The positioning points include the back height control point, the outer waist height control point, the shoe opening outer waist turning point, the shoe opening depth control point, the shoe opening inner waist turning point, and the shoe opening inner waist height point. A second virtual model is created based on the aforementioned positioning points; Manufacturing auxiliary tools based on the second virtual model; The manufacturing auxiliary tool based on the second virtual model includes: placing printing materials into a printing device, importing the parameters of the second virtual model into the printing device, and the printing device performing layered printing according to the parameters of the second virtual model to obtain the auxiliary tool.

2. The auxiliary tool manufacturing method according to claim 1, characterized in that, The step of scanning the shoe last and constructing the first virtual model further includes: Simultaneously, multiple shoe lasts are scanned, and the first virtual model corresponding to each shoe last is constructed to form a shoe last model set.

3. An auxiliary tool, characterized in that, It is produced by the auxiliary tool manufacturing method according to any one of claims 1 or 2.

4. The auxiliary tool according to claim 3, characterized in that, The auxiliary tool includes a first opening and a second opening, which are used to fit the auxiliary tool onto the shoe last.

5. The auxiliary tool according to claim 4, characterized in that, The edge of the second opening coincides with the reference line of the shoe opening of the shoe last.

6. A method for drawing a reference line for a shoe opening, characterized in that, Using any one of the auxiliary tools described in claims 3 to 5, the auxiliary tool is fitted onto the shoe last, and a shoe opening reference line is drawn on the shoe last along the edge of the second opening.

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