EP3780988A1

EP3780988A1 - Production method for producing a foot part

Info

Publication number: EP3780988A1
Application number: EP19720494.4A
Authority: EP
Inventors: Matthias Knoll
Original assignee: Powerslide GmbH
Current assignee: Powerslide GmbH
Priority date: 2018-04-18
Filing date: 2019-04-17
Publication date: 2021-02-24
Also published as: US20210030104A1; DE102018109189A1; WO2019202014A1

Abstract

Production method for producing a foot part (100) for a sports shoe (300), comprising the steps of creating (S101) a flexible shaped part (101) for the shoe upper (105) and shoe sole (107) of the foot part (100); and connecting (S104) the edges (113) of the shaped part (101) along the shoe sole (107) and around the shoe tip (123).

Description

METHOD OF MANUFACTURING A FOOT PART

The present invention relates to a manufacturing method for producing a foot part for a sports shoe and a foot part for a sports shoe.

It is the technical object of the present invention to simplify the manufacture of a foot part for sports shoes.

This task is performed by objects according to the independent

Claims solved. Advantageous embodiments are the subject of the dependent claims, the description and the figures.

According to a first aspect, the object is achieved by

A manufacturing method for manufacturing a foot part for a sports shoe, such as an inline skate shoe or a bicycle shoe, comprising the steps of producing one or more flexible mold parts for the shoe upper and shoe bottom; and joining the edges of the one or more

Moldings along the shoe bottom and around toe. The molded part comprises, for example, a foam-like material. The molded part can be produced from a single-layered or multi-layered layer material or by an injection molding process. Of the

The heel region of the molded part can be pulled up laterally, so that it is adapted to the shape of a hard shell and

Cutouts (Flex Cuts) can be omitted. The process simplifies and accelerates the manufacture of the sports shoe and improves the quality of the sports shoe.

In a technically advantageous embodiment of the

Manufacturing process, the edges of the molding are connected by sewing, welding or gluing. This will For example, the technical advantage achieved that the molding can be closed in an efficient manner in the corresponding areas.

In a further technically advantageous embodiment of the production method, the molding comprises a layer of polyurethane foam. In general, the molding may comprise one or more layers. As a result, for example, the technical advantage is achieved that the foot can be made with an effective padding in the interior.

In a further technically advantageous embodiment of the production method, the molded part is produced by punching out of a material web or by casting in a mold. The molding may be cast from polyurethane, ethylene-vinyl acetate copolymer (EVA), latex or other molding material in any form. The casting is realized for example by an injection molding process.

In a further technically advantageous embodiment of the manufacturing process, additional shoe materials, such as an inner part of EVA foam or a

Air cushion system, doused with the casting material or poured into this. This allows other shoe materials with the

Casting material can be combined and volume and weight saved. When pouring or pouring these shoemaking materials are enclosed by the casting material. For this purpose, the shoe materials are placed in the mold before the casting material is poured.

As a result, further functional layers can be incorporated into the molded part. For example, the strength of the molded article can be increased by pouring a textile layer as a shoe material. The shoe materials can also be laminated or glued on the inside or outside. Will be a hard-wearing

Shoe material attached to the outside of the molding, the shoe produced can also be used as a street shoe.

The outside shoe material may be a stretchable material, such as microfiber, lycra, polyurethane, a thermoplastic polyurethane (TPU) film, kevlar, or woven materials. The inside of the shoe material may be a stretchable material, such as polyester or microfiber textile materials.

In a further technically advantageous embodiment of the manufacturing process, the molding of the casting material, such as polyurethane foam, homogeneous with

consistent hardness to be poured.

In a further technically advantageous embodiment of the production method, the molded part can be cast inhomogeneously, so that different regions of the molded part have a different degree of hardness. In this case, for example, the sole region of the molded part has a higher degree of hardness than the area around the ankle or around the heel (dual density). The sole area and the heel area can be made in one piece.

In a further technically advantageous embodiment of the production method, an air pump system with an inflatable volume is poured into the molded part. The air pumping system thus comprises the inflatable volume, which is formed for example by a bag or balloon. The inflatable volume is enclosed by the casting material. This is for example also achieves the technical advantage that the weight of the shoe is reduced and a thickness and hardness of the molding can be adjusted depending on the pressure in the volume.

By casting, for example, the technical advantage is achieved that the molding can be made quickly and efficiently in any shape.

In a further technically advantageous embodiment of the manufacturing process, the molding is made by casting the

Casting material produced in a hard shell of the shoe. As a result, the technical advantage is achieved, for example, that the hard shell forms a firm connection with the molding.

The molded part comprises the hard shell after curing. The hard shell serves to support the foot and / or to establish a mechanical connection with the rail.

In a further technically advantageous embodiment of the production method, the layer material comprises a layer of polyurethane foam. As a result, for example, the technical advantage is achieved that the molding with a

Upholstery can be made in a simple and fast way.

In a further technically advantageous embodiment of the manufacturing method, the foot part is an inner shoe. As a result, for example, the technical advantage is achieved that more functional shoe parts on the outside of the

Foot part can be attached.

In a further technically advantageous embodiment of the manufacturing method, the foot part is glued to a hard shell. As a result, for example, the technical advantage achieved that the hold of the sports shoe is improved by the hard shell.

In a further technically advantageous embodiment of the manufacturing method, a depression in the region of the ankle is produced in the molded part. As a result, for example, the technical advantage is achieved that pressure points in

Heel area of the foot can be prevented.

In a further technically advantageous embodiment of the manufacturing process, ventilation slits or ventilation openings are produced in the molded part. As a result, for example, the technical advantage is achieved that increases the wearing comfort of the sports shoe.

In a further technically advantageous embodiment of the manufacturing process, the ventilation slots or

Ventilation holes formed in the area of the sole. As a result, for example, the technical advantage is achieved that a formation of sweat can be reduced.

In a further technically advantageous embodiment of the manufacturing method, recess channels or holes are formed in the heel area of the molded part in the area in front of the ankle

formed to increase the flexibility of the molding. As a result, for example, the technical advantage is achieved that the molding can be easily adapted to the shoe last. The recesses also bring the technical advantage of a weight saving and provide more freedom of movement.

In a further technically advantageous embodiment of the manufacturing method, the center of the molding is attached to a Heel section of a shoe last created. As a result, for example, the technical advantage is achieved that the

Interior of the sports shoe can be manufactured with high precision.

In a further technically advantageous embodiment of the manufacturing method, the side sections of the molded part are bent around the heel section in the direction of the toe of the shoe last. As a result, for example, the technical advantage is achieved that can be easier to connect the edges of the molding.

According to a second aspect, the object is achieved by a foot part for a sports shoe, with a flexible molded part, the edges of which are connected along the shoe bottom and around the toe. The molding may be a molded molding formed as previously illustrated.

In a further technically advantageous embodiment of the foot part, the molded part has on one side a

Overlap portion for forming a tab on the other side of the molding.

According to a third aspect, the object is achieved by a

Sports shoe with a foot part solved according to the second aspect.

Embodiments of the invention are illustrated in the drawings and will be described in more detail below.

Show it

Fig. 1 is a schematic view of an in-line skate; 2 is a plan view of a molded part.

Fig. 3 is a schematic view of a shoe last;

Fig. 4 is a schematic view of a shoe last with

applied molding;

5 shows a further schematic view of the shoe last with forwardly bent side sections of the molded part;

6 shows a further schematic view of the molded part with the heel area stitched together;

Fig. 7 is a schematic view of the foot part of the

Molding;

8 shows a schematic view of another foot part from the molded part;

Fig. 9 is another schematic view of the foot part of the

Molding; and

10 is a block diagram of a manufacturing method.

1 shows a schematic view of an in-line skate 300 as a form of a sports shoe 300. The in-line skate 300 comprises a foot part 100 with a hard shell 111, which together form the

Sports shoe 300 form. The hard shell 111 forms the lower part of the sports shoe 300. The sports shoe 300 is connected via the hard shell 111 with a rail 400 with rollers 401. The foot part 100 comprises a shoe upper 105 and a shoe bottom In-line skates 300 are skates in which the rollers 401 are arranged in an in-line. The rail 400 may be made of aluminum and has in parts a reverse U-shaped profile. Transverse bores in the rail 400 are used to mount the ball-bearing rollers 401 by means of screwed axles.

The sports shoe 300 may also be a bicycle shoe. in the

Generally, the athletic shoe 300 may be any athletic shoe in which the foot 100 may be used.

2 shows a plan view of a molded part 101 for producing the foot part 100 for the in-line skate 300. The molded part 101 is manufactured from a foam-like layer material 103 and has a specially adapted shape for producing a shoe upper 105 and a shoe bottom 107 of the foot part 100 on. The molded part 101 may be formed in one piece.

The molding 101 is constructed substantially mirror-symmetrical to the center 109 and comprises two U-shaped or tongue-shaped side portions 115 with a round tip 123, from which the

Shoe bottom is formed together with the surrounding foot 100.

In addition, the molded part 101 comprises two center sections 119 which surround a rear and lateral heel or calf area of the foot. The side portions 115 protrude laterally from the center portions 119. The molding 101 may have on one side an overlapping portion 131 for forming a tab on the other side of the molding 101. As a result, the finished foot part 100 can be closed at the front. The overlapping portion 131 may be formed on one side of the molding 101. By the overlapping portion 131 has the Form part 101 on the one hand a greater width in the region of the center portion 119 than on the other side. Of the

Overlapping portion 131 on one side overlaps the

Molded part 101 on the other side, when the foot part 100 is fully formed.

The molded part 101 is produced in one piece from a layer material 103 which has at least one layer of foam-like

Includes plastic material. However, the molding 101 may also comprise two or more parts which are glued, sewn or welded at a seam.

The layer material 103 comprises, for example, a layer of cushioning polyurethane foam or another cushioning foam, for example in a thickness of 5 mm. The material for the foam can be used in different degrees of hardness.

For softer materials, the focus is on comfort, while harder materials are more for performance. Through a mix of soft and hard layers of material, a compromise in terms of comfort and performance can be achieved.

The molding 101 or the laminate 103 may also comprise a layer of ethylene vinyl acetate (EVA). The EVA layer can be produced by an EVA fuel injection process. The

Molding 101 or sheet material 103 may also comprise a gel padding material. The layer material 103 or the

Molded part 101 has, for example, a thickness of 5 mm.

In addition, the layer material 103 may comprise further layers, such as a firmer outer layer (liner) for the upper shoe. The upper for the upper shoe can be welded on, glued or poured. The firmer outer layer can be made of plastic and to support the foot or serve against wear of the foot part 100. This outer layer may be glued or sewn to the other layers of the molded part 101. In general, the layer material 103 of the molding 101 may be multilayered with different

Functional materials and components be constructed. Various materials are glued, sewn or welded together in several layers for layer construction.

In the molding 101 may additionally recesses 129 or

Elevations are introduced to ensure a comfortable fit

Sport shoe 300 to increase or a certain function of the

Sport shoe 300 support. For example, in the heel or ankle region 117 recesses 129 may be provided in the molding 101 to prevent pressure points on the foot.

In the area of the sole of the foot, the molded part 101 may, for example, have a protrusion to support the arch of the foot or a weighting or cushioning function. However, a separate insole may also be provided. Also in the area of the front sole or in the side area of the foot part 100 can in the

Form part 101 surveys may be provided so that a better adaptation to edges of a hard shell 111 can be made. Other surveys in the molding 101 may be provided for massage or comfort purposes.

The depressions can be impressed or pressed into the molded part 101 by means of appropriate tools. The protrusions can be created by adding material on the inside or the outside of the molding 101, for example, by foaming, sewing or gluing corresponding parts. The molded part 101 is either punched out in the desired shape from a layer material 103 or cast in the desired shape, for example in an injection molding process. The

Form part 101 can adapt to the anatomical conditions of the foot after the spatial shaping. The molded part 101 also has, for example, rounded edges 113 or a rounded outer contour, so that injuries or irritations of the foot can be prevented, such as in the region of the manhole.

In addition, the molded part 101 can have recesses 121 for increasing the flexibility at certain points. For example, recesses 121 may be provided in the region of the heel, which result in that the molded part 101 can be bent in a simpler manner or adapts to a shoe last. In addition, recess channels 125 or holes 127 may be formed to increase the flexibility of the molding.

The recesses can be in a direction or in the course

Cross section be V-shaped or U-shaped. Such recesses 121 for increasing flexibility can be placed anywhere

be provided, where a high flexibility of the molding 101 is required.

Next, the molding 101 with ventilation holes or

Be provided ventilation channels, such as in the area of the shoe sole. The ventilation openings or ventilation channels allow air flow inside the foot part 100 and increase the wearing comfort of the foot part 100. These can

for example, match with corresponding recesses in the hard shell 111 and be provided at the appropriate place. The hard shell 111 is made of solid plastic and may be glued or sewn to the foot part 100.

The manufacture of the foot part 100 can be carried out by the use of a shoe last. In general, however, it is also conceivable, the foot part 100 with the molding 101 without

Manufacture shoe lasts. For example, the molding 101 may be flat and placed in an injection mold and thus joined to the shell and shaped. It is then glued or welded.

Fig. 3 shows a shoe last 200. The shoe last 200 is used to make the foot part 100 and provides a spatial

Replica of the human foot. The shoe last 200 may be one, two or more parts. The shoe last 200 is the forming tool that determines the inner dimensions and shape of the foot 100. Foot length, foot width and ball circumference of the shoe last 200 are in a certain relationship to each other. The shoe last 200 includes, among other things, a heel portion 201 and a tip 203. Of the

Shoe racks 200 can be made of different materials

be made, such as wood or plastic.

FIG. 4 shows a schematic view of a shoe last 200 with a molded part 101 applied. In the case of the bar-based production of the foot part 100, first of all the shaped part 101 is placed in the middle 109 on the heel part 201 of the shoe last 200.

Subsequently, the further shaping of the foot part 100 is performed by applying the molding 101 to the shoe last 200.

5 shows a further schematic view of the shoe last 200 with side portions 115 of the molded part bent forwards 101. For further production of the foot part 100, the

Side sections 115 of the molded part 101 are bent around the heel section 201 in the direction of the tip 203 of the shoe last 200. As a result, a further shaping of the foot part 100 takes place.

FIG. 6 shows a further schematic view of the molded part 101 with the heel area 117 sewn together

Side portions 115 of the molded part 101 have been bent around the shoe last 200, the edges 113 of the molding 101 in the heel region 117 are connected together. This can be done by sewing. However, it is also possible to glue the edges 113 together.

FIG. 7 shows a schematic view of the foot part 100 from the molded part 101. The edges 113 of the molded part 101 are connected along the shoe bottom 107 around the shoe tip 123. The two sides of the molding 101 form a manhole in the middle of the foot part 100. The molded part 101 for the production of the foot part 100 may include an anatomical footbed with an arch in the corresponding area. The shoe last 200 is still in the foot 100 and is then removed.

Fig. 8 shows another schematic view of another foot part

100 of the molded part 101. In this foot part 100, the one side of the molding 101 is formed with the overlapping portion 131. Otherwise, the molding 101 may be the same

Have features such as that shown in Fig. 2.

The overlapping portion 131 on one side of the molding

101 is located on the other side of the molding 131 at the

Surface on. By the overlapping portion 131 is formed at the front of the foot part 100 a tab. Through the tab Ingress of moisture into the foot part 100 can be prevented and the tongue formed integrally in the foot part 100.

FIG. 9 shows a further schematic view of the foot part 100 from the molded part 101. In this view, one recognizes how the edges 113 of the molded part 101 along the shoe bottom 107

sewn together.

Finally, the shoe last 200 can be removed and the foot part 100 thus manufactured glued directly to the hard shell 111 or the shaft of the foot part 100 or by means of a

Velcro fasteners are connected. A tongue of the foot part 100 can be manufactured in the same way. This is sewn into the foot part 100 and riveted. The tongue of the foot part 100 may also be sewn, welded or glued or connected by Velcro or push button. In addition, lace holes can be introduced into the foot part 100.

In this way, shoes 100 for in-line skates can be easily and with little technical effort

produce sheet-like layer materials 103.

10 shows a block diagram of a manufacturing method for an in-line skate. In a first step S101, the one-piece, flexible molding 101 for the shoe upper 105 and shoe bottom 107 of the foot part 100 is produced. In a second step S102, the edges 113 of the molding 101 along the

Shoe bottom 107 and connected around the toe 123 around.

Thereby, the foot part 100 is produced for the sports shoe 300, which can be provided with other components, such as a hard shell, to form the sports shoe 300. The

Foot part 100 may generally be used in each athletic shoe 300 for which it is suitable, such as cycling shoes.

All of the features explained and shown in connection with individual embodiments of the invention may be provided in different combinations in the article according to the invention in order to simultaneously realize their advantageous effects.

All method steps may be implemented by means suitable for carrying out the respective method step. All functions by objective

Characteristics may be a method step of a method. The scope of the present invention is defined by the

Claims given and is by the in the description

explained or the figures shown features not limited.

REFERENCE NUMBERS

100 foot part

101 molding

103 layer material

105 shoe upper

107 shoe bottom

109 middle

111 hard shell

113 edges

115 side sections

117 heel area

119 middle sections

121 recess

123 shoe lace

125 recess channel

127 hole

129 deepening

131 Overlap section

200 shoe lasts

201 heel section

203 tip

300 inline skate / sports shoe

400 rail

401 rollers

Claims

A manufacturing method for manufacturing a foot part (100) for a sports shoe (300), comprising the steps of:

Producing (S101) a flexible molding (101) for the shoe upper (105) and shoe bottom (107) of the foot part (100);

Joining (S102) the edges (113) of the molding (101) along the shoe bottom (107) and around the toe (123).

2. The manufacturing method according to claim 1, wherein the edges (113) of the molding (101) are joined by sewing, welding or gluing.

3. Production method according to one of the preceding

Claims, wherein the molding (101) comprises a layer

Polyurethane foam includes.

4. Production method according to one of the preceding

Claims, wherein the molding (101) is produced by punching out of a layer material (103) or by casting in a mold.

5. A manufacturing method according to claim 4, wherein the

Layer material (103) comprises a layer of polyurethane foam.

6. Production method according to one of the preceding

Claims, wherein the foot part (100) is an inner shoe.

7. Manufacturing method according to one of the preceding claims, wherein the foot part (100) is glued to a hard shell (111).

8. Production method according to one of the preceding

Claims, wherein in the molding (101) a recess (129) is generated in the region of the ankle.

9. Production method according to one of the preceding

Claims, wherein in the molding (101) ventilation slots or ventilation openings are generated.

10. The manufacturing method according to claim 9, wherein the

Ventilation slots or vents are formed in the area of the sole.

11. Production method according to one of the preceding

Claims, wherein in the heel region (117) of the molding (101) or in the area in front of the ankle recess channels (125) or holes (127) are formed in order to increase the flexibility of the molding.

12. Production method according to one of the preceding

Claims wherein the center (109) of the molding (101) is applied to a heel portion (201) of a shoe last (200).

13. Production method according to one of the preceding

Claims wherein the side portions (115) of the molding (101) are bent around the heel portion (201) towards the tip (203) of the shoe lace (200).

A footboard (100) for a sports shoe (300) comprising: a flexible molding (101) whose edges are joined along the shoe bottom (107) and around the toe (123).

15. foot part (100) according to claim 14, wherein the molding (101) on one side an overlapping portion (131) for forming a tab on the other side of the molding (101).

16 sports shoe (300) with a foot part (100) according to claim 14 or 15.