WO2023010627A1

WO2023010627A1 - Two-section composite shoe last and preparation method therefor

Info

Publication number: WO2023010627A1
Application number: PCT/CN2021/114910
Authority: WO
Inventors: 斋藤胜雄; 黄展宏
Original assignee: 富士優你科技有限公司
Priority date: 2021-08-04
Filing date: 2021-08-27
Publication date: 2023-02-09
Also published as: CN113519984A; CN113519984B

Abstract

A two-section composite shoe last, comprising an aluminum last core, a plastic last housing, and a connection assembly. The aluminum last core comprises a first last core and a second last core, the first last core and the second last core being connected by means of the connection assembly; the plastic last housing wraps the aluminum last core, a partition piece is provided at the connection of the first last core and the second last core, and the partition piece extends out of the connection and divides the plastic last housing into two portions. Also provided is a preparation method for the two-section composite shoe last, comprising five steps of last core preparation, assembling, injection molding, cooling and shaping, and finishing.

Description

Two-section composite shoe last and its preparation method

Cross-references to related applications.

This application claims the priority of the Chinese patent application with the application number "202110891706.1" and the title of the invention "two-section composite shoe last and its preparation method" submitted to the China Patent Office on August 4, 2021, the entire contents of which are incorporated by reference incorporated in this application.

technical field

The invention relates to the technical field of shoemaking, in particular to a two-section composite shoe last and a preparation method thereof.

Background technique

Shoe last is the matrix of shoes and the forming mold of shoes. The shoe last not only determines the shape and style of the shoe, but also determines whether the shoe fits and protects the foot. At present, the production of shoe lasts is made by mechanical processing, and the strength is stable and can be reused. However, at present, a specific shoe last is specified for a shoe size and shoe shape. The higher the accuracy and shape requirements of the last, the higher the processing accuracy and difficulty, the higher the cost, but the trend of people's aesthetics changes rapidly, and the replacement of shoe lasts is also very fast, which has resulted in the replacement of a large number of shoe lasts, cost Increase.

technical problem

Nowadays, the production of shoe lasts is generally divided into forefoot and heel by cutting. During the division, the cutting surface will be uneven and the size will change, and only shoes with fixed styles and sizes can be produced. Once the shoe last is cut After that, secondary processing can no longer be performed to change the size and style.

technical solution

According to various embodiments of the present application, a two-section composite shoe last is provided, which can effectively save the processing cost of the shoe last blank and improve the integrity of the shape and size of the shoe last.

A two-part composite shoe last, comprising an aluminum last core, a plastic last shell and a connecting assembly, the aluminum last core includes a first last core and a second last core, the first last core and the second last core Connected through the connection assembly; the plastic last core wraps the first last core and the second last core, and a separator is provided at the connection between the first last core and the second last core; A separator protrudes from the junction and divides the plastic last shell into two parts.

In one embodiment, the outer surface of the separator is coated with a non-stick layer.

In one of the embodiments, the two-section composite shoe last further includes a clamping piece and a fastener; the clamping piece is provided with a first shaft hole, and the aluminum last core is provided with a first screw hole; the The fastener passes through the first shaft hole and the first screw hole in sequence; the fastener installs the clamping member on the upper end surface of the aluminum last core.

In one of the embodiments, the clamping member is provided with a second shaft hole.

Alternatively, the clamping member is provided with a dovetail groove.

In one embodiment, the aluminum last core is an open-cap last, the connecting assembly includes a pin, and the first core last is arranged at the instep of the second core through the pin.

The second core has the first screw hole, and the fastener connects the clamping piece with the second core.

In one of the embodiments, the aluminum last core is a spring last, and the connection assembly includes an elastic member, the elastic member is bent into a hook shape, one end of the elastic member is connected to the first last core, and the The other end of the elastic member is connected with the second last core.

The connection between the first core and the second core is provided with a V-shaped groove, and the clamping part is provided with a snap-in block matching the V-shaped groove; the first core has the the first screw hole.

When the clamping block is inserted into the V-shaped groove, the fastener connects the clamping piece with the first core.

In one of the embodiments, the spacer includes a first spacer and a second spacer, the upper part of the first spacer is arranged between the first core and the clamping piece, the The lower part of the first separator is arranged between the first core and the second core; the second separator is arranged between the second core and the clamping piece.

In one of the embodiments, the aluminum last core is a spring last, the connecting assembly includes an elastic member, a connecting piece and a pin, and the two ends of the connecting piece are connected to the first core and the second through the pin. The last core is connected; the elastic piece is bent into a hook shape, one end of the elastic piece hooks the connecting piece, and the other end of the elastic piece is connected to the second last core through a pin.

The second last core is provided with a second screw hole, and the first last core is provided with a third screw hole; the fastener passes through the first shaft hole, the second screw hole and the third screw hole in turn, so that The fastener locks the clip, the first last core and the second last core.

According to various embodiments of the present application, a method for preparing the above-mentioned two-section composite shoe last is also provided, which is simple to operate and lower in cost.

A method for preparing a two-section composite shoe last, comprising the following steps: preparing a last core: heating aluminum or an aluminum alloy to form molten aluminum, pouring the molten aluminum into the inner core mold of a die-casting machine, and cooling the molten aluminum After the mold is solidified, the mold is released to obtain the first core and the second core; assembly: the separator is sandwiched between the first core and the second core, and the first core and the second core are connected through the connecting component Assemble the aluminum last core; injection molding: add the plastic material to the injection molding machine for heating and dissolving, put the aluminum last core into the mold of the injection molding machine for injection molding; cooling and setting: cool the injection molded mold so that the plastic in the mold Shaping, the shaped shoe last is demolded and then cooled twice to obtain the rough shoe last; finishing: Assemble the clamping part and the rough shoe last, and install the rough shoe last on the engraved last through the clamping part On the machine, the plastic on the outer surface of the rough shoe last is cut and finished, and the cut shoe last rough exposes the separator, and a two-section composite shoe last can be obtained.

In one of the embodiments, before assembly, the separator is treated with non-adhesive glue, and the outer surface of the separator is coated with Teflon.

Beneficial effect

The two-section composite shoe last of this application is designed as a composite structure with two layers of inner and outer layers. By wrapping the aluminum last core with a plastic last shell, the aluminum last core is not easy to damage and can be used repeatedly; and the plastic last shell can be processed into shoes of different sizes. Last, the aluminum last core can also be detached by hot melting, which has low utilization cost and simple steps, effectively saving the processing cost of the shoe last blank; in addition, there are separators on the first last core and the second last core, which are convenient for subsequent processing. During the cutting process, the plastic last shell is separated, and its cross-section can be separated by a separator. The cut surface is complete, which improves the integrity of the shape and size of the shoe last, and makes the manufactured shoes more comfortable and fit the shape of the foot.

The preparation method of the two-part composite shoe last of the present application has uncomplicated procedures, simple operation and low cost.

Description of drawings

In order to better describe and illustrate embodiments and/or examples of the inventions disclosed herein, reference may be made to one or more of the accompanying drawings. Additional details or examples used to describe the drawings should not be considered limitations on the scope of any of the disclosed inventions, the presently described embodiments and/or examples, and the best mode of these inventions currently understood.

Fig. 1 is a three-dimensional schematic diagram of a two-section composite shoe last of the first embodiment.

Fig. 2 is an exploded schematic diagram of the two-section composite shoe last in Fig. 1 .

Fig. 3 is an exploded schematic view from another angle of the two-section composite shoe last in Fig. 2 .

Fig. 4 is a schematic cross-sectional view of the two-section composite shoe last in Fig. 1 cut along the movable assembly.

Fig. 5 is a schematic cross-sectional view of the two-section composite shoe last in Fig. 1 cut along the center of the second shaft hole.

Fig. 6 is a schematic cross-sectional view of the two-section composite shoe last cut along the center of the second shaft hole of the second embodiment.

Fig. 7 is an exploded schematic view of the two-section composite shoe last of the second embodiment.

Fig. 8 is a three-dimensional schematic diagram of a two-section composite shoe last of the third embodiment.

Embodiments of the present invention

In order to facilitate the understanding of the present invention, the following will describe the present invention more fully. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention.

Please refer to FIG. 1 to FIG. 5 , which are the two-section composite shoe last according to the first embodiment of the present invention, which is a conventional two-section spring last. The shoe last is designed as a composite structure with two layers of inner and outer layers. By wrapping the aluminum last core with a plastic last shell, the aluminum last core is not easy to damage and can be used repeatedly; while the plastic last shell can be processed into shoe lasts of different sizes, and can also be processed by heating The aluminum last core is detached by melting, which has low cost and simple steps, which effectively saves the processing cost of the shoe last blank; in addition, there are separators on the first last core and the second last core, which are convenient for the plastic in the subsequent cutting process. The last shell is separated, and its cross-section can be separated by a separator. The cut surface is complete, which improves the integrity of the shape and size of the shoe last, and makes the manufactured shoes more comfortable and fit the shape of the foot.

Specifically, as shown in Figures 1 to 5, the two-section composite shoe last 100 of the first embodiment of the present invention includes an aluminum last core 10, a plastic last shell 20, a connecting assembly 50, a clamping member 30 and a fastening 40; the aluminum last core 10 includes a first last core 11 and a second last core 12; the first last core 11 and the second last core 12 are connected by a connecting assembly 50; the aluminum last core 10 has an upper end surface, and the plastic last core 20 passes through The injection molding method wraps the area of the aluminum last core 10 except the upper end surface.

The aluminum last core 10 is put into the injection molding machine and fixed with the injection mold, and the plastic last shell 20 wraps the aluminum last core 10 through injection molding;

A separator 60 is provided at the joint of the first last core 11 and the second last core 12 , and the separator 60 protrudes from the joint and divides the plastic last shell 20 into two parts.

In order to prevent the separator 60 from being bonded to the plastic last shell 20 and affect the neatness of the separation section of the plastic last shell 20, the outer surface of the separator 60 is coated with a non-stick layer (not shown in the figure), which facilitates the separation of the plastic last shell 20 and the separator. Separation between 60 sheets. In this embodiment, the non-stick layer is a Teflon layer.

The number of separators 60 is one, of course, multiple separators 60 can be overlapped and clamped between the first core 11 and the second core 12 . The two separator sheets 60 closest to the first core 11 and the second core 12 may be coated with a non-stick layer. More than two separators 60, the two separators 60 closest to the first core 11 and the second core 12 may not be coated with a non-stick layer, and the first core 11 and the second core 12 are directly glued. Next, the rest of the separators 60 are all coated with a non-stick layer.

In this embodiment, the rear part of the first last core 11 and the front part of the second last core 12 have cross-sections that coincide with each other, and the cross-sections are stepped; Between the cross-sections of the core 12, the separator 60 matches the cross-sections, forming a stepped structure. The position is limited by the step-shaped section. On the one hand, the separator 60 can be better clamped between the first core 11 and the second core 12, and both the first core 11 and the second core 12 It forms a snap-fit clamping relationship, which is not easy to fall off or shift; on the other hand, it can effectively prevent the first last core 11 and the second last core 12 from being misaligned up and down, and can match the first last core 11 and the second last core 12 for quick assembly Positioning improves the efficiency of shoemaking.

In this embodiment, the first last core 11 is provided with a first positioning hole 110 , and the second last core 12 is also provided with a second positioning hole 120 . The number of the first positioning hole 110 and the second positioning hole 120 is at least one, the first last core 11 has one first positioning hole 110 , and the second last core 12 has one second positioning hole 120 . The shape and distribution of the first positioning holes 110 and the second positioning holes 120 are random.

In this embodiment, the connection assembly 50 includes an elastic member 51, a connecting piece 52 and a pin 53; a first groove 111 is provided inside the first core 11, and a second groove is also provided inside the second core 12. 121; the separator 60 is provided with a perforation 61 matching the elastic piece 51 and the connecting piece 52; the two ends of the elastic piece 51 and the connecting piece 52 respectively pass through the perforation 61 and extend into the first groove 111 and the second groove 121, Both ends of the elastic member 51 and the connecting piece 52 are respectively connected with the first last core 11 and the second last core 12 through bolts 53 .

The first groove 111 and the second groove 121 form a chamber (not marked), and the elastic member 51 and the connecting piece 52 move in the chamber; the elastic member 51 is bent into a hook shape, and one end of the elastic member 51 hooks the connecting piece 52 One end of the elastic member 51 is connected to the second last core 12 through a pin 53; the connecting piece 52 supports the relative sliding and closing of the first last core 11 and the second last core 12, and the elastic member 51 provides damping for sliding and closing.

In this embodiment, the section of the first last core 11 is provided with a first installation groove 112, and the section of the second last core 12 is also provided with a second installation groove 122, and the two sides of the separator 60 are respectively installed in the first installation groove. 112 and the second installation groove 122, the separator 60 is connected with the first last core 11 and the second last core 12 by bolts. In order to prevent the installation of the separator 60 from affecting the assembly of the aluminum last core 10 and the final molding of the shoe last, the cross section of the second last core 12 is provided with engaging grooves 13 that match the bolts. Of course, the first mounting groove 112 can also be provided only on the first core 11, or the second mounting groove 122 can only be provided on the second core 12; Both the first last core 11 and the second last core 12 are provided.

In this embodiment, the clamping member 30 is provided with a first shaft hole 32, and the first shaft hole 32 is inclined; the clamping member 30 is provided with a second shaft hole 33 on both sides of the first shaft hole 32, and the two second The shaft holes 33 are arranged vertically and parallelly; the second last core 12 is provided with a second screw hole 14 matching the first shaft hole 32 , and the first last core 11 is provided with a third screw hole 15 matching the second screw hole 14 The fastener 40 passes through the first shaft hole 32, the second screw hole 14 and the third screw hole 15 in turn; the fastener 40 locks the clamping part 30, the first last core 11 and the second last core 12 tight.

The clamping part 30 does not need to be divided into two parts because the shoe last is a two-section structure. It only needs to be provided with the second screw hole 14 and the third screw hole 15 connected to the first last core 11 and the second last core 12. The fastener 40 sequentially passes through the first shaft hole 32 , the second screw hole 14 and the third screw hole 15 to lock the clip 30 , the first last core 11 and the second last core 12 . This connection mode not only saves the manufacturing cost of the clamping member 30, but also facilitates the installation. The machine equipment is connected with the clamping member 30 through the second shaft hole 33; thereby realizing the fixation of the shoe last, this indirect clamping method can reduce the damage to the shoe last during the moving or clamping process.

In this embodiment, the fastener 40 is a bolt, and the fastener 40 is screwed to the aluminum last core 10 after passing through the clamping member 30 .

The preparation method of the two-section composite shoe last in this embodiment includes six steps of preparing the last core, non-sticking treatment, assembly, injection molding, cooling and shaping, and finishing.

In this embodiment, the steps of preparing the last core are as follows: heating aluminum or aluminum alloy to 650-700 degrees to melt the aluminum liquid, then pouring the aluminum liquid into the inner core mold of the die-casting machine, and cooling the aluminum liquid After the mold is solidified for 60 seconds, the mold is released to obtain the first last core and the second last core.

In this embodiment, the step of non-adhesive treatment is: coating the outer surface of the separator with Teflon.

In this embodiment, the assembling step is as follows: clamp the separator between the first last core and the second last core, and assemble the first last core and the second last core through a connecting component to obtain an aluminum last core.

In this embodiment, the steps of injection molding are as follows: first, start the injection molding machine to preheat, add the plastic material PE into the injection molding machine and heat and dissolve for 2 hours; put the aluminum last core into the mold of the injection molding machine, when the temperature of the die head Reach 180-200 degrees, then carry out injection molding wrapping.

In this embodiment, the step of cooling and shaping is as follows: cooling the injection-molded mold with cold water for 2 minutes, so that the plastic in the mold is shaped, and after the shaped shoe last is demoulded, put it into cold water or warm water for secondary cooling. Obtain the shoe last rough embryo.

In this embodiment, the steps of finishing are: assembling the clamping piece with the rough shoe last, installing the rough shoe last on the last engraving machine through the clamping piece, and finishing the plastic on the outer surface of the rough shoe last. After cutting and finishing, the rough shoe last after cutting is exposed to the separator, and a two-section composite shoe last can be obtained.

Please refer to FIG. 6 and FIG. 7 , which is a two-section composite shoe last 100a according to the second embodiment of the present invention. The shoe last 100a is a V-shaped two-section spring last. The shoe last 100a includes an aluminum last core (not marked), a plastic last shell 20a, a connecting component (not marked), a clamping piece 30a and a fastener 40a; the aluminum last core includes a first last core 11a and a second last core 12a, The first last core 11a and the second last core 12a are connected by connecting components; the aluminum last core has an upper end surface, and the plastic last shell 20a wraps the area of the aluminum last core except the upper end surface by injection molding; the clamping part 30a is passed through a fastener 40a is detachably installed on the upper end surface of the aluminum last core.

A separator 60a is provided at the connection between the first last core 11a and the second last core 12a, and the separator 60a protrudes from the connection and divides the plastic last shell 20a into two parts.

In this embodiment, the separator 60 a includes a first separator 62 and a first separator 63 . The upper part of the first separator 62 is arranged between the first last core 11a and the clamping member 30a, and the lower part of the first separator 62 is arranged between the first last core 11a and the second last core 12a; the first partition The sheet 63 is arranged between the second core 12a and the clamp 30a.

The outer surfaces of the first separator 62 and the first separator 63 are coated with a non-stick layer (not shown).

In this embodiment, the first last core 11a is provided with a first positioning hole 110a, and the second last core 12a is also provided with a second positioning hole 120a. The number of the first positioning hole 110a and the second positioning hole 120a is at least one, the first last core 11a has one first positioning hole 110a, and the second last core 12a has one second positioning hole 120a. The shape and distribution of the first positioning holes 110a and the second positioning holes 120a are random.

In this embodiment, the connection assembly includes an elastic member 51a; a first groove 111a is provided inside the first last core 11a, and a second groove (not shown) is also provided inside the second last core 12a; the first The separator 62 is provided with a perforation 61a matching the elastic member 51a; two ends of the elastic member 51a pass through the perforation 61a and extend into the first groove 111a and the second groove respectively.

In this embodiment, the clip 30a is provided with a first shaft hole 32a, and the first shaft hole 32a is arranged obliquely; the clip 30a is provided with a second shaft hole 33a on both sides of the first shaft hole 32a, and the two second shaft holes The shaft holes 33a are arranged vertically and parallelly; the first last core 11a is provided with a first screw hole 16 matching the second shaft hole 32a; the fastener 40a passes through the first shaft hole 32a and the first screw hole 16 in sequence, The piece 40a locks the clamping piece 30a and the first last core 11a.

The connection between the first last core 11a and the second last core 12a is provided with a V-shaped groove, and the clip 30a is provided with a clamping block 34 matching the V-shaped groove; the clamping block 34 is inserted into the V-shaped groove; the second A shaft hole 32a extends obliquely from the top of the clamping member 30a toward the front of the engaging block 34 .

The scheme for preparing the two-section composite shoe last of this embodiment is basically the same as that of the first embodiment, and will not be repeated here.

Please refer to FIG. 8 , which is a two-section composite shoe last 100b according to the third embodiment of the present invention, and the shoe last 100b is a spring last. The shoe last 100b includes an aluminum last core 10b, a plastic last shell 20b, a connecting assembly (not shown), a clamping part 30b and a fastener (not shown); the aluminum last core 10b includes a first last core 11b and a second last The core 12b, the first last core 11b and the second last core 12b are connected by connecting components; the connection between the first last core 11b and the second last core 12b is provided with a separator (not shown in the figure), and the separator protrudes from the connection And the last shell 20b is divided into two parts.

In this embodiment, the clamping member 30b is provided with a first shaft hole 32b, and the first shaft hole 32b is arranged obliquely; the second last core 12b is provided with a first screw hole matching the first shaft hole 32b (not shown in the figure). ), the first last core 11b is provided with a second screw hole (not shown) that matches the first screw hole; the fastener passes through the first shaft hole 32b, the first screw hole and the second screw hole in sequence, and tightens The firmware locks the clip 30b, the first last core 11b and the second last core 12b.

In this embodiment, the two sides of the top of the clamping piece 30b are provided with dovetail grooves 31, and the machine equipment clamps and fixes the clamping piece 30b through the dovetail grooves 31, thereby realizing the fixing of the shoe last. This indirect clamping The method can reduce the damage to the shoe last during the moving or clamping process.

In order to facilitate the separation between the plastic last shell and the separator, the outer surface of the separator is coated with a non-stick layer. In this embodiment, the non-stick layer is a Teflon layer.

In this embodiment, the structure of the connecting component may refer to the first embodiment or the second embodiment, and details are not repeated here.

In the fourth embodiment of the two-part composite shoe last of the present invention, the shoe last is an open-lid last. The shoe last includes an aluminum last core, a plastic last shell, a connecting component, a clamp and a fastener; the aluminum last core includes a first last core and a second last core, and the first last core and the second last core are connected through a connecting component; The second last core has an upper end surface, and the plastic last core wraps the area of the first last core and the second last core except the upper end surface by injection molding; the clamping part is installed on the upper end surface of the second last core by fasteners; the second last core A separator is provided at the connection between the first last core and the second last core, and the separator protrudes from the connection and divides the last shell into two parts.

In this embodiment, the connection assembly includes a pin, and the first core is arranged at the instep of the second core through the pin.

In this embodiment, the first last core is provided with a first positioning hole, and the second last core is also provided with a second positioning hole. The number of the first positioning hole and the second positioning hole is at least one, and the shape and distribution of the first positioning hole and the second positioning hole are random.

The number of separators is one, and of course a plurality of separators can be overlapped, and the plurality of separators are overlapped and clamped between the first core and the second core. The two separator sheets closest to the first core and the second core can be coated with a non-stick layer. For more than two separators, the two separators closest to the first core and the second core may not be coated with a non-stick layer, and the first core and the second core may be directly bonded, and the rest of the separators shall be Apply a non-stick layer.

In the above embodiments, the aluminum last core can be made of aluminum, aluminum alloy or other light-weight metals; and the fasteners used for connection and fastening can be bolts, and the bolts pass through the clamping parts Finally, it is screwed with the aluminum last core. Of course, the fasteners can also be replaced by screws or rivets.

The above-mentioned embodiment only expresses one implementation mode of the present invention, and its description is relatively specific and detailed, but it should not be understood as limiting the patent scope of the invention. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims

A two-part composite shoe last, comprising an aluminum last core, a plastic last shell and a connecting assembly, the aluminum last core includes a first last core and a second last core, the first last core and the second last core Connected through the connection assembly; the aluminum last shell wraps the plastic aluminum last core, and a separator is provided at the connection between the first last core and the second last core; the separator protrudes from the connection And the plastic last shell is divided into two parts.
According to the two-section composite shoe last according to claim 1, the outer surface of the separator is coated with a non-stick layer.
According to the two-section composite shoe last according to claim 2, the two-section composite shoe last also includes a clamping piece and a fastener; the clamping piece is provided with a first shaft hole, and the aluminum last core is provided with a There is a first screw hole; the fastener passes through the first shaft hole and the first screw hole in sequence; the fastener installs the clamping piece on the upper end surface of the aluminum last core.
According to the two-part composite shoe last according to claim 3, the clamping part is provided with a second shaft hole or a dovetail groove.
According to the two-section composite shoe last according to claim 4, the aluminum last core is an open-cover last, the connecting assembly includes a pin, and the first last core is arranged at the instep position of the second last core through the pin ; The second last core has the first screw hole, and the fastener connects the clamping piece with the second last core.
According to the two-part composite shoe last according to claim 4, the aluminum last core is a spring last, the connecting assembly includes an elastic piece, the elastic piece is bent into a hook shape, and one end of the elastic piece is connected to the second A last core is connected, and the other end of the elastic member is connected to the second last core; a V-shaped groove is provided at the connection between the first last core and the second last core, and the clamping part is provided with A clamping block matching the V-shaped groove; the first last core has the first screw hole; when the clamping block is inserted into the V-shaped groove, the fastener will The clip is connected to the first core.
According to the two-section composite shoe last according to claim 5, the separator comprises a first separator and a second separator, and the upper part of the first separator is arranged between the first core and the clip. Between the holders, the lower part of the first spacer is set between the first core and the second core; the second spacer is set between the second core and the clip between the holders.
According to the two-section composite shoe last according to claim 4, the aluminum last core is a spring last, the connecting assembly includes an elastic member, a connecting piece pasted with a bolt, and the two ends of the connecting piece are connected to the first shoe through the bolt. The last core is connected to the second last core; the elastic member is bent into a hook shape, one end of the elastic member hooks the connecting piece, and the other end of the elastic member is connected to the second last core through a pin; The second last core is provided with a second screw hole, and the first last core is provided with a third screw hole; the fastener passes through the first shaft hole, the second screw hole and the third screw hole in turn, so that The fastener locks the clip, the first last core and the second last core.
A method for preparing a two-section composite shoe last, comprising the following steps: preparing a last core: heating aluminum or an aluminum alloy to form molten aluminum, then pouring the molten aluminum into the inner core mold of a die-casting machine, and cooling the molten aluminum After the mold is solidified, the mold is released to obtain the first core and the second core; assembly: the separator is sandwiched between the first core and the second core, and the first core and the second core are connected through the connecting component Assemble the aluminum last core; injection molding: add the plastic material to the injection molding machine for heating and dissolving, put the aluminum last core into the mold of the injection molding machine for injection molding; cooling and setting: cool the injection molded mold so that the plastic in the mold Shaping, the shaped shoe last is demolded and then cooled twice to obtain the rough shoe last; finishing: Assemble the clamping part and the rough shoe last, and install the rough shoe last on the engraved last through the clamping part On the machine, the plastic on the outer surface of the rough shoe last is cut and finished, and the cut shoe last rough exposes the separator, and a two-section composite shoe last can be obtained.
According to the method according to claim 9, before assembling, the separator is subjected to non-adhesive treatment, and the outer surface of the separator is coated with Teflon.