WO2020113813A1 - Manufacturing method for multi-layer product hot-melt connection structure and application thereof - Google Patents

Abstract

A manufacturing method for a multi-layer product hot-melt connection structure and an application thereof. By means of hot-melt connection between a first connector (10) and a hot-melt connector (30), single-layer or multi-layer intermediates (20) are sandwiched therebetween to achieve the purpose of one-step connection and combination. Different structural layers can be bonded without a complicated bonding process, thereby improving the production efficiency of multi-layer product combination; moreover, further simplification and further improvement of the production efficiency can be achieved in combination with an injection process.

Description

Manufacturing method and application of multi-layer product hot-melt connection structure Technical field

The invention belongs to the technical field of hot melt injection molding machine manufacturing, and particularly relates to a manufacturing method and application of a multi-layer product hot melt connection structure.

Background technique

With the improvement of living standards, people have a greater demand for the diversity of daily necessities and industrial supplies; most of the products are composed of multi-layer structures; such as cushions, outer skin decoration, inner elastic foam , Bottom support plate, etc.; under normal conditions, these multi-level structures are connected by bonding, stitching and other processes; for example, in the field of shoe manufacturing, including soles and uppers; soles may also include outsoles and midsoles Wait, the outsole needs to be bonded to the midsole to form the sole, and the sole needs to be bonded to the upper to form; this traditional shoe bonding process not only needs to connect the two together, but also needs to ensure that there is a certain degree between the connection layers The connection strength is not easy to peel, so the process is more complicated; for example, the bonding of traditional shoes needs to be treated on the bonding surface, drying, brushing glue, drying, brushing glue, pressing, shaping, cooling, ,, etc. long processes; high labor costs and low production capacity; and in the development of modernization, labor costs will become higher and higher, efficiency, speed, automation will become the most demanded mainstream; in this form, traditional The connection structure of multi-level products makes the connection process complicated, and is no longer suitable for future development.

Plastic injection molding technology, in the existing application, can inject an object of a certain shape into one body; it can also inject a hot-melt liquid in a molten state onto the surface of another solid material. After the hot-melt liquid is cooled, the formed The hot-melt solid is directly shaped and attached to another solid material. The surface of the solid material melts at a high temperature, and the part in contact with the hot-melt liquid achieves a chemical fusion connection; the above-mentioned integrated molding processing method and the attached connection method are in a certain way To a certain extent, the injection process is used to improve production efficiency, but the above-mentioned plastic injection molding process connection structure is only used to directly inject the object 1 and attach it to the object 2 to form a product; Multi-level connection combination; as shown in Figure 1, for example, a product is a combination of structural layer 1, structural layer 2, and structural layer 3. Using the existing injection process, you can select structural layer 1 for injection molding and make the structural layer 1 is directly attached to the structural layer 2 and the connection between the other structural layer 3 and the structural layer 1 or 2 still needs to be connected by another injection or bonding process; the structural layer 1 cannot be reached by one injection , 2, 3 connection purpose; What's more, in a product, the structure layer 2 may be a multi-layer structure, then the existing injection process method, it is impossible to connect them into a whole through a single injection.

Summary of the invention

In order to overcome the shortcomings of the existing technology, one of the objectives of the present invention is to provide a method for manufacturing a multi-layer product hot-melt connection structure, through the hot-melt connection of the first connector and the hot-melt connector, the intermediate is locked in In the middle, through this structure, the purpose of the first connection body, the hot-melt connection body, the intermediate body, and the multi-layer structure are connected at one time, thereby improving the production efficiency of the combination of multi-layer products.

The present invention solves one of the objectives of the invention, and the technical solutions adopted are:

The manufacturing method of the multi-layer product hot-melt connection structure is characterized in that it includes a first connection body, an intermediate body, and a hot-melt connection body; the intermediate body is provided with a through connection hole; and the first connection body is provided with a connection The plug teeth corresponding to the holes; the hot-melt connection is defined as a meltable material, the material is heated above the melting point to melt into a liquid hot melt liquid, the material is cooled below the melting point and cooled to a solid state Hot melt connector; the manufacturing method includes the following steps,

Step A: Insert the plug teeth of the first connector into the connection hole of the intermediate body correspondingly, so that the first connector and the intermediate body form a plug body;

Step B, providing a mold, the mold including a shaping cavity, a coupling opening is provided on one side of the shaping cavity, and the shaping cavity is preset with an injection channel;

Step C, the side of the intermediate body away from the first connecting body is combined with the side of the opening of the shaping cavity, so that the end of the plug tooth away from the first connecting body communicates with the shaping cavity or extends into the cavity space of the shaping cavity ;

Step D, inject hot melt liquid into the shaping cavity through the injection channel, the hot melt liquid contacts the plug teeth, and cools the hot melt connection body shaped into a preset shape in the shaping cavity;

The plug teeth are hot-melt connected with the hot-melt connector, the intermediate body is sandwiched between the first connector and the hot-melt connector; the first connector, intermediate body and hot-melt connector are between the hot-melt connector and the plug-in teeth Connected into a multi-level product.

A method for manufacturing a multi-layer product hot-melt connection structure in the above technical solution includes a first connector, a hot-melt connector, and an intermediate body; a plug-in tooth on the first connector body, and a connection hole for the plug-in intermediate body; The hot melt adhesive connector is connected to the plug teeth inserted into the connection hole on the other side of the intermediate body, and the intermediate body can be clamped from both sides, so that the first connector, the intermediate body, and the hot melt adhesive body are connected at Together, the intermediate can be not only a single-layer structure, but also a stacked multilayer structure. The multilayer intermediate can also be controlled by the clamping force of the first connector on both sides and the hot-melt adhesive connector Close to the force; and the hot melt adhesive connector can be manually molded by mold injection molding or hot melt machine injection molding, the hot melt liquid can be cooled and formed after contact with the plug teeth, the connection structure of the process is simple, the structure is simple, no matter The number of layers and the structure of the intermediate body can be formed into an integrated connection structure through the connection of the hot-melt adhesive connector and the first connector, the overall connection time is greatly shortened; the connection efficiency is high, the connection strength is high; the first connection The shape and size of the body, intermediate, and hot-melt adhesive connector can be designed according to actual needs and application fields. It has a wide range of industrial applications and can be widely used in the field of shoe manufacturing, bicycle seat cushion manufacturing, bicycle handle manufacturing, , Etc. In the technical field that requires the combination of multiple structural layers, a lot of production costs are saved.

The second object of the invention of the present application is also to provide the above-mentioned method for manufacturing a multi-layer product hot-melt connection structure, an application in the field of seat cushion manufacturing,

A seat cushion, characterized in that the seat cushion includes an intermediate elastic layer as an intermediate body and a surface ornament layer of the first connector, the intermediate elastic layer is provided with a connecting hole, and the surface ornament layer is provided with plug teeth for insertion The teeth are inserted into the connection holes, and at the bottom of the middle elastic layer, there is a hot-melt connection body as a support structure of the seat cushion; the seat cushion is carried out by the manufacturing method of the multi-layer product hot-melt connection structure described in any of the above embodiments produce.

The third object of the invention of the present application also provides an application of the above-mentioned method for manufacturing a multi-layer product hot-melt connection structure in the field of bicycle handle manufacturing,

A bicycle grip, characterized in that: the bicycle grip includes a hard supporting body as an intermediate body, the intermediate body is a hollow cylindrical structure; a surface decoration layer structure as a first connecting body; an intermediate body A number of connecting holes are provided, and the first connecting body is provided with a number of plug-in teeth; the plug-in teeth are inserted into the connecting holes; the bicycle grip is connected by the hot-melt of the multi-layer product according to any one of claims 1-15 In the process of production, the hot-melt connector is placed inside the intermediate body of the hollow cylindrical structure.

The beneficial effects of the present invention are as follows: The present invention discloses a method for manufacturing a multi-layer product hot-melt connection structure, including a first connector, a hot-melt connector, an intermediate of a single-layer or multi-layer structure; Teeth, plug the connection hole of the intermediate body; the hot melt adhesive connector forms a physical hot melt connection and/or chemical hot melt connection with the plug teeth inserted into the connection hole on the other side of the intermediate body; Multi-layer intermediates are sandwiched from both sides, so that the first connector, single-layer or multi-layer intermediates, and hot-melt adhesive are connected together. Multi-layer intermediates can also pass through the first connectors on both sides The clamping force with the hot-melt adhesive connector controls the adhesion strength of the multilayer structure; and the hot-melt adhesive connector can be manually formed by mold injection molding or hot melt machine injection molding, which is cooled by the hot melt liquid contacting the plug teeth It can be formed simply. The process of the connection structure is simple and the structure is simple. No matter how many layers the intermediate body has or what structure it is, it can form an integrated connection structure through the connection of the hot melt adhesive connector and the first connector. The overall connection The time is greatly shortened; the connection efficiency is high and the connection strength is high; the shape and size of the first connector, intermediate body, and hot melt adhesive connector can be designed according to actual needs and application fields, and the industrial application is wide and can be widely used in shoes In the manufacturing field, the manufacturing field of bicycle seat cushions, the manufacturing field of bicycle handlebars, and the like, which require multiple layers of structural layers to be combined, a large amount of production cost is saved. Compared with manual bonding and other methods, this manufacturing method has shorter time consumption and higher production efficiency, and is suitable for industrial production of large quantities of products.

The technical solution of the present application can be applied to the connection of multi-level products, such as the field of shoemaking, cushion manufacturing, bicycle grips, etc., thereby reducing the processing time of products in various fields and greatly reducing the manufacturing cost; It has great market application prospects and can greatly improve the overall productivity level of society.

BRIEF DESCRIPTION

The present invention will be further described below with reference to the drawings and embodiments.

1 is a schematic diagram of a connection structure of multi-level products in the prior art described in this application;

2 is a schematic diagram of a hot-melt connection structure of a multi-layer product described in an embodiment of this application;

3 is a structural diagram of another multi-layer product hot-melt connection described in an embodiment of this application;

4 is a schematic structural diagram of a physical hot-melt connection structure of a plug tooth and a hot-melt connection body according to an embodiment of the present application;

FIG. 5 is a schematic structural view of connecting a plurality of plug teeth and a hot-melt connector according to an embodiment of the present application;

6 is a schematic structural view of a physical hot-melt connection structure of an intermediate body and a hot-melt connection body according to an embodiment of the present application;

7 is a schematic diagram of a structure of a receiving groove described in an embodiment of the present application;

8 is a schematic structural view of a shoe manufactured in the application of the manufacturing method of the multi-layer product hot-melt connection structure of the present application in the field of shoe manufacturing;

9 is a schematic structural diagram of an example of a mold in an embodiment of the present application;

10 is a schematic structural view of a top view of an explosion structure of an example of a mold in an embodiment of the present application;

11 is a schematic structural view of an explosion structure of an example of a mold in an embodiment of the present application looking up;

FIG. 12 is an enlarged schematic structural view of area A in FIG. 11;

FIG. 13 is a schematic structural view of a mold inner kernel in an embodiment of the present application.

detailed description

The present invention will now be described in further detail with reference to the drawings. These drawings are simplified schematic diagrams and only illustrate the basic structure of the present invention in a schematic manner, so they only show the configuration related to the present invention.

In the description of this application, it should be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "left", "right", " The orientation or positional relationship indicated by "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be construed as a limitation of the present invention. In the description of this application, unless otherwise stated, the meaning of "plurality" is two or more.

In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be fixed connection or detachable Connected, or connected integrally; either mechanically or electrically; directly connected, or indirectly connected through an intermediary, or internally connected between two components. For those of ordinary skill in the art, the specific meaning of the above terms in this application can be understood in specific situations.

First of all, this application will explain the problems in the prior art mentioned in the background art with reference to the drawings;

As shown in Figure 1, a product has three structural layers. The figure only shows the structural layer 1, structural layer 2, and structural layer 3 in a schematic way; here, the shape of the three structural layers, The size is not specifically limited. When applied to a specific technical field, a person skilled in the art can adapt the design according to the characteristics required in each field and then use it; under normal conditions, when a product has multiple structural layers , We generally bond or seam the structural layer 1, structural layer 2, structural layer 3, there will be lines in the seam, in some occasions that have special requirements for appearance, it is not applicable, and the general bonding application is more In the case of bonding, in order to ensure the bonding strength, the bonding process is complicated, see the description in the background technology, and no more detailed description is given here;

With the advancement of technology, the hot melt injection process is produced; through the injection process, a certain structural layer can be directly formed and attached to another structural layer, such as the melting point of structural layer 1 and structural layer 2 in some fields Similar, then when the structural layer 1 is injected, the surface of the structural layer 2 melts and the structural layer 1 can form a chemical thermal fusion connection, the structural layer 1 can be directly injected on the structural layer 2; but the combination of the structural layer 1 and the structural layer 2 After that, when connecting with the structural layer 3 again, the prior art still needs to be bonded or stitched, or injected again to connect the structural layer 3 to the side of the structural layer 2 away from the structural layer 1; that is, the current In the injection process, when forming a product with a multi-layer structure of more than 3 levels, multiple bonding or multiple injections are required; at the same time, the hot melt injection process structure in the prior art generally only uses chemical hot melt Connection; the structural layer of the hot melt connection, the general melting point needs to be similar, so that the surface layer can be melted, and then the hot melt connection can be performed through the injection process, which also has many restrictions on the product material;

The following describes the hot-melt connection structure of the multi-layer products that can be produced by the manufacturing method of the present application in detail through multiple embodiments and multiple figures in FIGS. 2-7;

As shown in FIG. 2, a hot-melt connection structure of a multi-layer product, the product may be any product or object in any application technology field; including a first connection body 10, a hot-melt connection body 30, and a single-layer structure intermediate 20; the intermediate body 20 is provided with a through connection hole 21; the first connection body 10 is provided with a plug tooth 11 corresponding to the connection hole 21; the intermediate body 20 is located in the first connection body 10 and the hot melt connection body 30 Between; the plug teeth 11 and the connection hole 21 are plugged; the hot-melt connector 30 and the plug teeth 11 are away from the first connector 10 at the end, physical hot-melt connection or chemical hot-melt connection;

As long as the size of the hot melt connection body and the size of the connection hole form a limiting relationship, the hot melt connection body 30 is not easy to come out from the connection hole 21, and the connection structure is not easy to loosen; of course, in some application fields, When the applied material is an elastic material, the connection hole 21 may become larger, or the first connection body 10 and the hot-melt connection body 30 may be smaller; the size of the cross-section is adjusted according to the amount of deformation of the respective material characteristics, even if the hot-melt connection Under the maximum deformation amount, the body 30 or the connecting hole 21 still needs to meet the requirement of not easy to loosen.

It should be noted here that the intermediate body 20 and the first connecting body 10 in FIG. 2 are both a single-layer structure formed by integral molding; in some embodiments, as shown in FIG. 3, the intermediate body 20 may be composed of multiple The layer structure is laminated, and the first connector 10 may be a single layer structure made of the same material (the “layer” in this application does not specifically refer to a layered structure, but means a certain level of structure, which may be Arbitrary shape); each layered intermediate structure layer 20 can be the same material or different materials; the thickness and shape of each layer can also be adjusted according to actual needs, and can be different; The laminated adhesive can also be glued or stitched first. At the same time, the present application is not limited to this. In some embodiments, the intermediate body 20 may have a single-layer structure, and the first connector 10 may have a multilayer structure; the first connector 10 may have a multilayer structure. It is inevitable that the first connection body 10 of the multi-layer structure is first connected into one body by adhesive, stitching or other connection methods. In some embodiments, the first connector 10 and the intermediate body 20 may both have a multilayer structure. In addition to the stacked multilayer structure in FIG. 3, in some embodiments, it may also be a wrapped multilayer structure; for example, it includes an inner layer and an outer layer, and the outer layer wraps the inner layer; the inner layer is made of the same or different Material layers are laminated.

In some embodiments, the radial cross-section of the plug teeth 11 may be cylindrical, triangular, square, arc-shaped, or elongated, of course, any other Non-specific shape.

In this embodiment, the plug teeth 11 and the connecting hole 21 are in clearance fit. However, this application is not limited to this. In other embodiments, an interference fit may also be used, and the interference fit may be used to increase the connection strength accordingly. The plug-in teeth are located in the connection hole, and the physical hot-melt connection can be carried out only with the clearance fit.

In this embodiment, as shown in FIGS. 2 and 3, the plug teeth 11 and the hot-melt connector 30 are chemically and hot-melted, and the hot-melt connector 30 must be a type that can be melted into a liquid and after cooling Form a solid material; chemical hot-melt connection means that when the temperature of the material of the plug teeth 11 is lower than or equal to the temperature of the hot-melt liquid, the hot-melt liquid contacts the plug teeth 11 and the surface material of the plug teeth 11 is made After the molten liquid and the surface of the plug teeth 11 are cooled, the formed hot melt connector 30 can directly form a chemical hot melt connection with the plug teeth 11.

However, in some embodiments, physical hot melt connection may also be used; for example, in some technical fields, when the melting point of the first connector 10 is much higher than the temperature of the hot melt liquid, physical Hot-melt connection; a physical hot-melt connection structure is provided on the end of the plug teeth 11 away from the first connection body 10; the physical hot-melt connection structure may be a counterbore or a wave pattern, or as shown in FIG. 4 The drawing (intermediate structure is invisible, not shown) is provided in the connecting through-hole 12 on the side of the end of the plug tooth 11. Because 12 is a through-hole, the hot melt liquid flows and cools to form a physical The connection structure improves the connection strength. The connection through hole 12 may also be in the form of a counterbore or a blind hole, or may have a physical connection effect. The physical hot melt connection structure of this application breaks the current situation that the hot melt injection process can only be applied in the field of chemical hot melt connection. The physical hot melt connection structure also breaks the restrictions on the material requirements of each structural layer, making the application field more widely.

In FIGS. 1 and 2, the plug teeth 11 show a state where the end away from the first connecting body 10 protrudes the connecting hole 21 and connects with the hot melt connecting body 30, which can increase the plug teeth 11 and the hot melt connection The connection area of the body 30 enhances the strength of the chemical hot-melt connection; but in some embodiments, even with an interference fit, it is still possible for the insertion teeth 11 to be located in the connection hole 21, but only the connection with the hot-melt connection If the surface area is reduced, the connection strength will be reduced accordingly; but even if the connection strength of a single plug tooth is reduced, the connection strength can be increased by adding multiple plug teeth 11;

As in the structure shown in FIG. 5 in an embodiment, in an embodiment, the first connecting body 10 may be provided with a plurality of insertion teeth 11, and only three insertion teeth 11 are shown in FIG. 5; the same middle The body 20 is provided with a plurality of connection holes 21; the hot melt connection body 30 is a single one; the hot melt connection body 30 is solidified after cooling by the hot melt liquid, and it is in a fluid state when it is not solidified, so even if it is inserted The end of the connection tooth 11 is located in the connection hole 21, and the fluid can still enter the connected connection hole 21 to contact the surface of the connection tooth 11 and be chemically and thermally connected to the connection tooth 11; in this case, If it is necessary to increase the area of the chemical hot-melt connection, the plug teeth 11 and the connection holes 21 can also be set into a gap fit; in this way, the hot melt liquid in a fluid state can flow into the gap between the plug teeth 11 and the connection holes 21, thereby Contact with the side of the plug teeth 11; increase the connection area, thereby improving the connection strength;

In some cases, the chemical hot-melt connection and the physical hot-melt connection may exist at the same time, so that the connection strength is higher and it is less likely to be peeled or separated.

In some embodiments, when the melting points of the three materials are all similar, it is also possible for the three to produce a chemical fusion connection structure; in this embodiment 2, when the plug teeth 11 are located in the connection holes 21, The material 3 of the plug tooth 11, the connection hole 21, and the hot melt connection body 30 all produce chemical fusion connection, and the connection hole 21 can even form a whole in a molten state, and the combination connection strength of the three is higher; in Example 1, The structure of the chemical fusion connection between the interface of the intermediate body 20 and the hot melt connection body 30 can also be formed; in addition to the chemical thermal fusion connection, the intermediate body 20 can also form a physical thermal fusion connection with the hot melt connection body, such as in FIG. 6 20 is provided with a channel 22, the channel 22 communicates with the connection hole 22 and the lower surface from the side of the connection hole 21, so that after the hot melt liquid is poured and cooled, the formed hot melt connection body 30 can form a physical hot melt connection with the intermediate body 30 Of course, in the structure in FIG. 6, the channel 22 is a counterbore or a blind hole provided on the inner side of the connection hole 21, and the intermediate body 20 and the hot-melt connector 30 may also form a physical hot-melt connection.

The above-mentioned multiple embodiments illustrate that the connecting hole 21 and the plug-in teeth 11 are provided with a plurality, corresponding to all the connecting holes 21, a hot-melt connector 30 is provided, and all the plug-in teeth in the connecting holes 21 11 The case of simultaneous connection. However, the present application is not limited to this. In some embodiments, the connection hole 21 and the plug teeth 11 are provided with several; corresponding to each connection hole 21 is a hot melt connection body 30 and It is also possible to connect the plug teeth 11 in the connecting hole 21, and the structural drawing is not shown. In some embodiments, there are several connection holes 21 and plug teeth 11; one or more than two plug teeth 11 form a connection group, and each connection group is provided with a hot-melt connector 30. It is also possible that the hot-melt connection body 30 is connected to one or more plug teeth 11 in the connection group, and the structural drawing is not shown.

In some embodiments, as shown in FIG. 7, a side of the intermediate body 20 near the hot melt connection body 30 is provided with a receiving groove 23 corresponding to the hot melt connection body 30, and the hot melt connection body 30 is placed in the receiving groove Within 23, the side of the intermediate body 30 is kept flat. The shape of the accommodating groove 23 can be preset in advance, so that its shape and size are adapted to the hot-melt connecting body 30.

As mentioned above, through a number of embodiments, the hot-melt connection structure of a multi-layer product that can be produced by the manufacturing method of the present application has been described; the specific structural description of the above-mentioned hot-melt connection structure can be fed back and incorporated into the following In the manufacturing method of the layered product hot-melt connection structure, confirm with the manufacturing method;

Take the shoe in FIG. 8 as an example, which is a shoe manufactured by the manufacturing method of the multi-layer product hot-melt connection structure of the present application, combined with the manufacturing method of FIGS. 9-13, including the following steps,

Step A: Insert the insertion teeth 11 of the upper 10 into the connection holes 21 of the sole 20, so that the upper 10 and the sole 20 form a connector; (the upper is the first connector and the sole is the intermediate body)

Step B, providing a mold 4 (here, mold 4 is a broad definition of mold 4, the mold 4 shown in FIGS. 9-13 can be applied here, but the mold 4 here is not limited to the drawings 9 shows the mold 4), the mold 4 used in the method includes a shaping cavity 41, the shaping cavity 41 is provided with a joint opening, the shaping cavity 41 is preset with an injection channel; (the shaping cavity 41 is mainly used In order to inject hot melt liquid and shape, because the hot melt connection body 30 is cooled and shaped through the shaping cavity 41, the shape, number, and size of the shaping cavity 41 can be designed to obtain various shapes, quantities, and sizes. There are one hot melt connection 30 in FIG. 8, but in different embodiments, the shape, number, size, etc. of the hot melt connection 30 can be changed accordingly according to the designer's requirements).

Step C, the side of the sole 20 far away from the upper 10 is combined with the side of the coupling opening of the shaping cavity 41, so that the end of the plug tooth 11 away from the upper 1 communicates with the shaping cavity 41 or extends into the cavity of the shaping cavity 41 In the space; (combination opening refers to the structure where the side of the shaping cavity 41 and the sole 20 are combined to be open, which facilitates the removal of the hot-melt connector 3 after cooling. In different embodiments, the coupling opening may be For direct bonding with the sole 20, a compression plate 42 can also be provided between the sole 20 and the shaping cavity 41, so as to avoid direct contact between the sole 20 and the shaping cavity 41 or the hot-melt liquid, which will be described in detail later Description)

Step D, the hot melt liquid is injected into the shaping cavity 41 through the injection channel, the hot melt liquid contacts the plug teeth 11, and the hot melt connection body 30 shaped into a preset shape is cooled in the shaping cavity 41; (because the plug teeth 11 is in communication with the shaping cavity 41 or inserted into the shaping cavity 41, so after the hot melt liquid is injected, the hot melt liquid will flow to fill the space of the shaping cavity 41 with the fluidity of the liquid, and contact the plug teeth 11; Then the hot-melt liquid is cooled and shaped, so that the hot-melt connection body 3 can form a chemical hot-melt connection with the plug teeth 11, or a physical hot-melt connection, or both connection methods exist at the same time.)

The radial cross-sectional length of the hot-melt connection body 30 is greater than the radial cross-sectional length of the connection hole 21; the plug teeth 11 are hot-melt connected to the hot-melt connection body 30, and the upper 10 and the sole 20 are inserted into the hot-melt connection body 30 The teeth 11 are connected to form shoes. When we design, we only need to ensure that the size of the hot melt connection body 30 is larger than the size of the connection hole 21, more accurately, let them form a limit relationship; so that the hot melt connection body 30 will not be easily inserted into the teeth The pulling force of 11 is released from the connecting hole 21, so that the effect that the upper 10 and the sole 20 are not easy to separate is achieved, and the shoe is formed.

Of course, in some embodiments, the hot-melt connection 30 has a particularly large elasticity, or the sole 20 has a particularly large elasticity, then the size of the hot-melt connection 30 and the size of the connection hole 21 need to be considered in design In order to prevent the hot-melt connection body 30 or the connection hole 21 from being elastically deformed, they may be separated from each other.

In the above description, the shoe manufacturing method of the present application is provided with a mold 4, but it is not to say that it cannot be produced without an external mold 4, the sole 20 itself is designed with a receiving groove of a hot-melt connection body 30 on the bottom surface as a finalized shape In the cavity 41, the connecting hole 21 is provided in the accommodating groove, and the insertion teeth 11 are correspondingly located therein, then the sole 20 itself can be used as a mold 4 in an unconventional sense, and then the hot-melt liquid is poured manually, the hot-melt The connection body 30 fills the accommodating groove and cools naturally, and can also form the hot-melt connection body 30; the mold 4 in this unconventional sense also has a shaping cavity 41, namely the accommodating groove; It also has a joint opening, but in this embodiment the joint opening and the sole 20 itself have been joined together from the beginning, which is a non-conventional joint opening. This method of manual production is not suitable for large-scale industrial production, and the labor cost is too high.

In some embodiments, the mold 4 further includes a compression plate 42 made of a hard material. The compression plate 42 has a melting point temperature higher than that of the hot-melt liquid. The compression plate 42 is provided for the plug teeth 11. There is a compression hole; the elastomer material of the sole 20 is compressed, so that the insertion teeth 11 are correspondingly inserted into the compression hole, and then communicated with the shaping cavity 41; the compression plate 42 is assembled by more than two plates, the compression hole They are all set on the assembly seam.

In this embodiment, the role of the hard compression plate 42 is to prevent the irregular shape of the hot melt connection body 30 after cooling; for example, the hot melt liquid is injected through a hot melt injection machine (not shown). It has an impulsive force during injection. If the liquid is injected directly against the surface of the sole 20, it is possible that the elastomer sole 20 will be deformed by impact, making the shape of the shaping cavity 41 unstable, and finally the shape of the hot melt connection 30 that is cooled out There will be discrepancies with the pre-designed shapes, which appear uneven. The hard compression plate 42 is provided to separate the sole 20 from the shaping cavity 41, so that the deformation of the hot-melt connection body 30 can be avoided. It is suitable for the side of the sole 20 near the hot-melt connection body 30 made of elastic material, and will It affects the formation of the hot-melt connection 30. The melting point temperature of the compression plate 42 is higher than the temperature of the hot melt liquid, then the hot melt liquid will not be chemically hot-melted with the compression plate 42; because there are many plug teeth 11, they must all communicate with the shaping cavity 41 or extend into In the shaping cavity 41, at the same time, the hot-melt connection 30 must be removable, so the compression plate 42 must not hinder the occurrence of these two effects, so the applicant designed the compression plate 42 as a detachable structure, and compressed The holes are provided on the assembly seam, and the disassembly and assembly of the compression plate 42 will not interfere due to the number of plug teeth 11; before combining the shaping cavity 41 with the plug teeth 11, the compression plate 42 can be assembled to cover the sole 20 and pass through The method of applying pressure allows the plug teeth 11 to enter the compression hole; and after the hot melt liquid is cooled, the hot melt connection body 30 can also be removed without interfering with the disassembly.

In the present application, a physical hot-melt connection structure (not shown in the figure) is provided on the plug teeth 11, for example, a connection counterbore, a wavy tooth pattern, or a connection through hole are provided on the end side of the plug teeth 11. Then, when the hot-melt liquid fills the connection sink hole, the wavy tooth pattern depression, and the connection through hole, it will be shaped according to the shape of these areas, thereby directly forming a limiting relationship with the plug teeth 11.

In some embodiments, the upper 10 can be integrally injection molded by an injection molding machine, and the sole 20 can be manufactured by other processes; in some embodiments, the sole 20 can be integrally injection molded, and the upper 10 can be formed by other processes. Manufacturing; in some embodiments, both can be integrated injection molding of the injection machine, and can be selected according to design requirements and cost requirements, in the case that the hot melt connection body 30 is also integrated injection molded by the injection machine Next, you can further shorten the time cost of shoemaking and reduce labor costs.

The sole 20 may be a single-layer injection structure, or may be a laminate of a multi-layer structure, which is produced by the method of the present application, and the layers do not even need to be adhered to each other, and can be connected to the shoe through the hot melt connection 30 Face 10 is locked in the middle.

The corresponding way of the plug teeth 11 and the hot-melt connection body 30 can also be varied, we can set a mold cavity 41 on the mold 4, or a plurality of mold cavity 41, in some embodiments, a separate It is possible that the plug teeth 11 correspond to a single shaping cavity 41; in some embodiments, more than two plug teeth 11 form a connection group; a single connection group corresponds to a single shaping cavity 41, so It is also possible that the shaping cavity 41 is connected to all the plug teeth 11 in the corresponding connection group; in some embodiments, the mold 4 may also be provided with only one shaping cavity 41, and the shaping cavity 41 is connected to all The plug teeth 11 are connected at the same time. This situation just corresponds to the shoe structure shown in FIG. 1, and one hot-melt connecting body 30 corresponds to connect all the plug teeth 11. When a hot-melt connector 30 connects a plurality of plug teeth 11 at the same time, the hot-melt connector 30 will no longer slip out of the connection hole 21 in such a connection method in which a plurality of I-shaped structures are combined. At the same time, the more plug-in teeth 11 corresponding to one shaping cavity 41, the less the number of disconnecting shaping cavity 41 is, to a certain extent, the number of injection holes in the shaping cavity 41 can be reduced. Simplify the structure.

As mentioned above, the shape of the upper 10 and the shape of the sole 20 can be adjusted according to design needs. In the embodiment shown in FIG. 8, the lower end of the upper 10 is provided for fitting with the sole 20 Upper fitting portion 12 (the upper fitting portion 20, which is the first connecting body fitting portion 20), and the lower surface of the upper fitting portion 12 is provided with insertion teeth for inserting into the connecting hole 21 of the sole 20 11; the upper fitting portion 12, provided on the inner side of the lower end of the wall of the upper 10, presents a closed ring structure or a discontinuous ring structure adapted to the shape of the sole 20; the insertion teeth 11 are provided at equal intervals on the upper The lower surface of the bonding part 12. What is shown in FIG. 1 is a closed-loop structure of the upper fitting portion 12; in some embodiments, the upper fitting portion 12 of FIG. 1 may also be set to be intermittent, and then each intermittent shoe Corresponding plug teeth 11 are provided on the surface bonding portion 12. The upper 10 of the upper fitting portion 12 with different structural designs has different appearances, which is convenient for satisfying the public's demand for diverse aesthetics.

Correspondingly, the sole 20 is provided with a vamp accommodating groove 22 for accommodating the vamp fitting portion 12 (the vamp accommodating groove, that is, the first connecting body is accommodated) Groove), the connection hole 21 is located in the shoe receiving groove 22. After the vamp fitting portion 12 is inserted and placed in the vamp accommodating groove 22, the flatness can be maintained, so that the shoe wearer has a better experience effect.

As shown in FIG. 8, the side of the sole 20 in contact with the hot-melt connection body 3 is provided with an injection accommodating groove 23 corresponding to the hot-melt connection body 30, and the injection accommodating groove 23 is used for placing a corresponding hot-melt connection体30. This arrangement can make the sole 20 flatter, not only make walking more stable, but also the hot melt connection 30 is not easy to wear and has a longer service life; of course in other embodiments, according to the needs of shoe design, the hot melt can also be made The connecting body 30 protrudes from the side of the sole 20, which belongs to the protection category of the present application.

If, in our actual application, the melting temperature of the surface material of the end of the plug teeth 11 away from the first connecting body 10 is greater than the temperature of the hot melt liquid; then the physical hot melt connection method can be used for setting; A physical connection structure is provided at an end of the insertion teeth 11 away from the first connecting body 10, and the insertion teeth 11 and the hot-melt connecting body 30 are connected by physical hot-melting connection. The physical connection structure is a connection counterbore provided on the side of the end of the insertion tooth 11 or a connection through hole 12 provided on the side of the end of the insertion tooth 11. Of course, this application is not limited to this, and other physical connection structures may also be used, not a detailed list.

If, in our actual application, the melting temperature of the surface material of the end of the plug teeth 11 away from the first connecting body 10 is less than or equal to the temperature of the hot-melt liquid, it can be connected by chemical hot-melt. Specifically, in some cases, physical hot-melt connection and chemical hot-melt connection can also coexist, only need to set the corresponding physical connection structure on the plug teeth 11 in advance in the manufacturing process;

The intermediate body 20 is a single-layer structure integrally formed by the third hot melt injection machine; in this case, the production efficiency can be greatly improved. As in the shoemaking field described above, the upper serves as the first connector 10 , The sole is used as the intermediate 20; the first connector and the intermediate are separately injection-molded, and then the hot melt adhesive is injected as the hot-melt connector 30 through the injection machine; forming an integrated shoe; the connection strength is high and the production efficiency is low There is no need to bond the first connecting body to the intermediate body in an adhesive manner; compared with the traditional shoe-making process, the cost and efficiency of shoe production can be greatly reduced.

In some embodiments, the intermediate body 20 is a stack of multiple single-layer structures integrally injection-molded with a third hot melt injection machine. For multiple single-layer structures, the materials of each layer may be different or the same. Preferably, the connection holes 21 are stacked first, and then the connection holes 21 may be punched first and then stacked.

In the actual manufacturing process, when designing the mold, each plug tooth 11 corresponds to a separate shaping cavity 41, and a structure in which a separate hot-melt connector 30 and a single plug tooth 11 are connected can be achieved.

In the actual manufacturing process, when designing the mold, the shaping cavity 41 may be designed in multiples, and the plug teeth 11 have one plug tooth 11 as a connection group or more than two plug teeth 11 as one The connection group, the plug tooth 11 of each connection group corresponds to a shaping cavity 41. In this way, a structure in which one or more than two plug teeth 11 are connected to a hot-melt adhesive connecting body 30 can be formed;

In the actual manufacturing process, when designing the mold, the shaping cavity 41 is one, and communicates with the plug teeth 11 in all the connecting holes 21 at the same time. In some embodiments, the mold is not involved, and the hot-melt liquid is poured into the intermediate holding tank only manually, and the hot-melt connection can be formed after cooling.

In the above three situations, in the first case, a shaping cavity 41 is separately provided for each plug tooth 11, then an injection port needs to be provided for each shaping cavity 41. In the second and third types, the shaping cavity 41 is reduced, and the injection port can also be reduced accordingly; according to the structure of the pre-set hot melt connection body, the shape and size of the shaping cavity 41 can be set, and then according to the shape of the shaping cavity 41 The size of the injection port can be adjusted appropriately. The injection machine and the shape of the shaping cavity 41 corresponding to the shape of the hot-melt connection body are provided with an injection port in the shaping cavity 41, which are all existing technologies in the art and belong to conventional technical means and need not be described in detail.

However, in some special technical fields, when the intermediate body 20 is an elastomer, or the side of the intermediate body 20 away from the first connection body is an elastomer material; when the hot melt connection body is injected through an injection process , The injection pressure of the intermediate body 20 will be generated, and the intermediate body 20 will correspond to the position of the injection point. Under the action of the injection force, passive compression will occur; this passive compression deformation will cause the injection liquid to increase and the hot melt after cooling The connection body is in a deformed state. When the injection is completed, the injection force disappears and the intermediate elastic force recovers, which will squeeze the hot-melt connection body in the deformed state, making the connection of the hot-melt connection body uneven; such In some cases, in certain application areas that require leveling, special treatment is required;

For example, the following method is adopted: the first mold is provided with a compression plate (not shown) made of a hard material, the melting point temperature of the compression plate is higher than the temperature of the hot-melt liquid, and the compression plate is provided with corresponding plug teeth A compression hole, the compression plate compresses the intermediate body in the direction of the first connecting body, so that the insertion teeth are correspondingly inserted into the compression hole to communicate with the shaping cavity 41. The compression plate first compresses the elastic intermediate body 20 and then ejects it; after success, the compression plate can be removed, the elastic intermediate body returns to elasticity, and the hot-melt connection body and the plug teeth form a connection and are not easily deformed. The compression plate can be assembled by multi-part plates, and the assembly seam passes through each compression hole, that is, the compression hole can be said to be assembled by multiple plates together, so that a compression plate with a detachable structure can be formed.

The compression plate compresses the intermediate body 20 in the direction of the first connecting body 10, the degree of compression is less than 50% of the thickness of the elastic material layer of the intermediate body 20, and is designed according to the actual required compression ratio of 10%, 20%, 30%, Any value such as 40% is acceptable.

The structure of the mold 4 illustrated in FIGS. 9-13 can be applied in the shoe production process described above. The mold 4 includes an upper mold component and a lower mold component; the lower mold component is provided with a shoe space The shoe space is used to place and fix the plug body of the upper 10 and the sole 20, and the side of the sole 20 away from the upper 10 faces the upper mold assembly; the upper mold assembly is close to the lower mold A shaping cavity 41 is provided on one side, and an injection channel for injecting hot melt liquid is preset in the shaping cavity 41;

In the mold clamping state, the plug teeth 11 communicate with the shaping cavity 41 or the plug teeth 11 extend into the space of the shaping cavity 41; the injection channel injects the hot melt liquid, the hot melt liquid contacts the plug teeth 11, and the hot melt liquid is in accordance with the shaping cavity 41 The shape in the mold-clamped state is cooled and fixed to form a hot-melt connection body 30, and the hot-melt connection body 30 is hot-melt-connected with the plug teeth 11.

In some embodiments, the mold 4 may not be provided with the shoe last inner member 5, and only by designing the shoe space, it is possible to achieve the structure that limits the insertion body; however, as shown in FIGS. 9-13 In order to better position the plug body of the mold 4 in the embodiment shown, the inventor designed a shoe last inner member 5 which is detachably fixed on the lower mold assembly The shoe last inner member 5 is used to detachably assemble the upper 10 and the sole 20 to the shoe last inner member 5 in a disassembled state; the shoe last inner The kernel assembly 5 is used to indirectly fix the plug body on the lower mold assembly in a state of being assembled with the lower mold assembly. By fixing the plug body on the shoe last inner member 5 and then positioning it through the shoe last inner member 5 and the shoe space, the positioning can be more precise;

Of course, according to the different structural characteristics of different shoe types, the shoe last inner member 5 needs to be adapted accordingly. For example, the shoe to be produced in FIG. 1 is a kind of slippers, and the slippers have front and rear Both ends are open structure; then we can make the following structural design of the last component 5 of the shoe last to adapt to the assembly structure of the slippers;

As shown in FIG. 13, the shoe last inner member 5 includes a slippers inner member 51, a left fixing block 52, and a right fixing block 53; the slippers inner member 51 is used to be inserted into the insertion body of the shoe upper 1 and the shoe sole 2 , The front and rear ends of the slippers inner 51 are provided with fixing pieces 511 protruding from the plug body; the left fixing block 52 and the right fixing block 53; the corresponding fixing pieces 511 are provided with matching grooves 57, the left and right sides of the fixing pieces 511 The bolt holes are respectively provided. The left fixing block 52 corresponds to the bolt hole on the left side of the fixing piece 511 and has corresponding up-and-down through-holes, and the right fixing block 53; the bolt hole on the right side of the corresponding fixing piece 511 has corresponding up-and-down through-holes Bolt hole; left fixing block 52 and right fixing block 53; from the left and right sides of the plug body of upper 1 and sole 2 are closed, the fixing block is located in the fitting groove 57, and the left fixing block is inserted into the bolt hole through the bolt 54 52 and the right fixing block 53; the front and rear ends are fixed to the fixing pieces 511 at the front and back ends of the inner 51 of the slippers, the side of the sole 2 is fit to the left fixing block 52 and the right fixing block 53; the inner side is fit; the left fixing block 52. The outer side wall of the right fixing block 53; and the inner side wall of the shoe-shaped space of the lower mold assembly are adapted to limit. Through the structural design of the shoe last inner member 5, the shoe last inner member 5 and the lower mold assembly can be detachably positioned, so that the shoe and the shoe last inner member 5 can be detached and positioned. Make positioning more precise and process-oriented.

In some embodiments, the front end of the slippers inner kernel 51 illustrated in FIG. 13 is provided with a brace hole, and the rear end of the slippers inner kernel 51 is provided with a brace heel hole; the insole of the shoe space The wall is provided with a brace bar 55 corresponding to the brace hole, and a brace bar 56 is provided with a corresponding brace hole. Of course, this application is not limited to this. The arrangement of the brace bar 55 and the brace bar 56 is only one embodiment of positioning support. In the actual mold 4 design, the inner bottom surface of the shoe space can also be realized by other means. Positioning support with the inner component 5 of the shoe last.

In some embodiments, the lower template assembly includes a lower template one 61, a lower template two 62;, foot block one 63, foot block two 64, lower template three 65, lower template four 66, guide rod 621, end Cylinder one 67, end cylinder two 68; the lower end surfaces of the foot block one 63 and the foot block two 64 are respectively fixed on both sides of the upper surface of the lower template one 61, the lower template two 62; located in the foot block one 63 and the foot block Between two 64 and fixed on the upper surface of the lower template one 61; the lower surface of the lower template three 65 is fixed on both sides of the foot block one 63 and the foot block two 64 away from the upper surface of the lower template one 61; the lower template two 62; with a guide rod 621, the lower template four 66 is provided on the upper side of the lower template two 62; on the upper side, the lower template four 66 is provided with a guide hole for sliding fit connection with the guide rod 621; the end cylinder one 67 is fixed At one end of the lower template four 66, the end cylinder two 68 is fixed to the other end of the lower template four 66, the end cylinders of the end cylinder one 67 and the end cylinder two 68 are fixed to the lower template two 62; upper; the lower template four 66 The upper surface constitutes the inner bottom wall of the shoe-shaped space, the lower template three 65 is a hollow structure, the foot block one 63, the foot block two 64, and the lower template three 65 constitute the side wall of the shoe type space, and the hollow structure of the lower template three 65 is a shoe The opening of the molding space; the lower template four 66 moves up and down by the pushing and pulling of the end cylinder one 67 and the end cylinder two 68, guided by the guide rod 621. Through the arrangement of this structure, the depth of the shoe space can be adjusted, because when the compression plate 42 is structurally matched, the compression force on the sole 20 can also be adjusted.

The structure of the compression plate 42 is also various. In some embodiments, the lower mold assembly includes a compression plate block 421, a compression plate block 422, a compression plate block 423, a sliding slot block 424, and a sliding slot block 425 , Side cylinder one 426, side cylinder two 427; chute base one 424 and chute base two 425 are respectively relatively fixed on the upper end surfaces of the side walls of the shoe-shaped space; chute base one 424 and chute base two The opposite inner surfaces of the 425 are provided with a chute along the length direction; the compression plate one 421 and the compression plate two 422 are located between the chute seat one 424 and the chute seat two 425, and the compression plate one 421 and the compression plate two 422 are both The ends are slidably connected to the chute of the chute base one 424 and the chute base two 425; the side cylinder one 426 is fixed on the upper end of the side wall of both sides of the shoe space, and the push rod of the side cylinder one 426 is connected to the compression plate One 421; the side cylinder two 427 is fixed on the upper end of the other side wall on both sides of the shoe space; the push rod of the side cylinder two 427 is connected to the compression plate two 422; the role of the side cylinder one 426 and the side cylinder two 427 Next, the compression plate one 421 and the compression plate two 422 move along the chute to separate or close together. The compression plate three 423 is a free part. When the compression plate one 421 and the compression plate two 422 are closed, the compression plate three 423 is filled into the compression plate Between the one 421 and the compression plate two 422, the assembly of the compression plate one 421, the compression plate two 422 and the compression plate three 423 is possible for the compression plate 42, and the shape, size and position of the insertion teeth 11 are provided on the assembly seam Compression holes corresponding to the plug teeth 11. With this arrangement, the mechanical control of the opening and closing of the compression plate can be achieved, and the efficiency of industrial production can be improved.

In some embodiments, the compression holes are arranged in a ring shape, the compression plate three 423 is located in the middle, the compression plate one 421 and the compression plate two 422 are located on both sides; the edge of the compression plate three 423 is provided with a position for clamping and positioning against the top The first positioning groove 4231; the shaping cavity 41 is an annular channel provided corresponding to the compression hole; the shaping cavity 41 is provided with a positioning block 412 having an inner positioning end 4122, an outer positioning end 4123, and a middle shape The cavity adaptation part 4121; the shaping cavity 41 is provided with a notch corresponding to the middle shaping cavity adaptation part 4121, and the middle shaping cavity adaptation part 4121 is correspondingly located in the notch to supplement the annular channel into a continuous channel; The shaping cavity 41 is combined with the compression plate 42, the inner positioning end abuts against the first positioning groove 4231 of the compression plate three 423, and the outer positioning end is used to abut the compression plate one 421 or the compression plate on the left and right sides of the compression plate three 423 On plate two 422. Improve positioning accuracy during mold clamping.

In some embodiments, as shown in FIGS. 9-13, the upper die assembly includes an upper die top plate 71, an upper die pull nail plate 72, an upper die nozzle plate 73, and an upper die shaping cavity plate 74 The upper mold cavity plate 74 is provided on the side of the upper mold assembly close to the lower mold component; the upper mold cavity plate 74 is located on the lower side of the upper die nozzle plate 73, and the upper die nozzle plate 73 is located on the upper die pull nail The lower side of the plate 72, the upper die pull nail plate 72 is located on the lower side of the upper die top plate 71; the upper end surface of the upper die top plate 71 is provided with an injection counter interface 75 for communicating with the hot melt liquid delivery pipeline of the injection machine, and the upper die shaping cavity plate 74 A shaping cavity 41 is provided on the side close to the lower mold assembly. The shaping cavity 41 is provided with an injection hole penetrating through the shaping cavity plate 74 of the upper mold. The upper mold nozzle plate 73 is provided with an injection channel 76. The injection hole and the injection channel 76 Communication; the injection interface 75 passes through the upper die plate 71 and the upper die pull nail plate 72 to communicate with the injection channel 76, the external hot melt liquid enters the injection channel 76 through the injection interface 75 and is injected into the shaping cavity 41 through the injection hole.

The specific mold structure in the above technical solution is only an example of a usable mold applied in the field of shoe manufacturing, but this application is not limited to this; in different product production processes, the specific structure of the mold is different Some adjustments need to be made; this application will not be described in detail.

In some embodiments, it can also be applied in the field of cushions. The cushions generally have a bottom support, an intermediate elastomer, and a leather decoration layer on the surface; then when applying the technical solution of the present application, the bottom support can be set as The hot melt connector of tpu uses the middle elastomer as the intermediate, and the surface decoration layer is set as the first connector; now the intermediate and the surface decoration layer are made, and then the insertion teeth are inserted into the connection hole, and finally injected The bottom support body of the shape required by the seat cushion; the production process is simpler, which can increase the capacity and manufacturing cost of the seat cushion; and so on, and can be applied in many technical fields; even if the first connector, the intermediate is a hard material such as metal It can still be connected by physical hot-melt connection of the hot-melt connector, and the multilayer intermediate body is clamped and connected together through the first connector and the hot-melt connector.

In addition to injecting the hot-melt connector through the hot-melt injection machine, in some embodiments, it is also possible to manufacture a mold and perform manual pouring. After cooling, a hot-melt connector can also be formed. The hot-melt connector can be a hot-melt adhesive, or It can be other materials that can be converted into solid-liquid; the specific situation is analyzed and selected according to the actual application.

In addition to seat cushions, in the field of bicycle grips or other motorcycle grips, the middle layer can also be set to a hollow cylindrical structure with connecting holes in the cylindrical wall; and then the elastic layer of the surface decoration can be used as the surface layer The first connector has a better feel and beauty; the surface ornament layer is sleeved on the ring-shaped middle layer, and the plug teeth are inserted into the connection hole. Inside the ring-shaped middle layer, the hot-melt connector is made by the mold design of the injection machine Injection; this is completely achievable; in some embodiments, it can also be that the first connector is inside the ring-shaped intermediate body, and the hot-melt adhesive connector is outside; in short, the first connector, the ring-shaped intermediate body The shape of the hot-melt connection is indefinite, and it can be changed according to the applied technical field. The seat cushion structure and grip structure described in this application are not shown in the drawings, but the text description is already very clear. Those skilled in the art of seat cushion technology or those in the bicycle technology field can use the description of the text of this application , You can clearly know the specific structural design.

The invention discloses a multi-layer product hot-melt connection structure, manufacturing process and multiple applications; mainly through the hot-melt connection of the first connector and the hot-melt connector, sandwiching a single layer or multiple layers of intermediates Through this structure, the purpose of the first connection body, the hot melt connection body, the single-layer or multi-layer intermediate connection and connection is achieved at one time, so that the structural layers do not need to be bonded through a complex bonding process, which improves The production efficiency of the combination of hierarchical products; a wide range of applications, and can be combined with the injection process to further simplify and improve production efficiency, creating another major application route for the hot melt injection process, and providing multiple hot melt connection structures using this application And the process can improve the production efficiency of multiple application products; this application can greatly reduce the processing time of products in various fields, can greatly reduce manufacturing costs; wide application fields, has great market application prospects, and can greatly improve the overall productivity of society Level.

Taking the above-mentioned ideal embodiment according to the present invention as a revelation, through the above description, the relevant staff can make various changes and modifications without departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the contents of the description, and the technical scope must be determined according to the scope of the claims.

Claims (17)

1. The manufacturing method of the multi-layer product hot-melt connection structure is characterized in that it includes a first connection body, an intermediate body, and a hot-melt connection body; the intermediate body is provided with a through connection hole; and the first connection body is provided with a connection The plug teeth corresponding to the holes; the hot-melt connection is defined as a meltable material, the material is heated above the melting point to melt into a liquid hot melt liquid, the material is cooled below the melting point and cooled to a solid state Hot melt connector; the manufacturing method includes the following steps,

   Step A: Insert the plug teeth of the first connector into the connection hole of the intermediate body correspondingly, so that the first connector and the intermediate body form a plug body;

   Step B, providing a mold, the mold including a shaping cavity, a coupling opening is provided on one side of the shaping cavity, and the shaping cavity is preset with an injection channel;

   Step C, the side of the intermediate body away from the first connecting body is combined with the side of the opening of the shaping cavity, so that the end of the plug tooth away from the first connecting body communicates with the shaping cavity or extends into the cavity space of the shaping cavity ;

   Step D, inject hot melt liquid into the shaping cavity through the injection channel, the hot melt liquid contacts the plug teeth, and cools the hot melt connection body shaped into a preset shape in the shaping cavity;

   The plug teeth are hot-melt connected with the hot-melt connector, the intermediate body is sandwiched between the first connector and the hot-melt connector; the first connector, intermediate body and hot-melt connector are between the hot-melt connector and the plug-in teeth Connected into a multi-level product.
2. The method for manufacturing a multi-layer product hot-melt connection structure according to claim 1, characterized in that: the mold further includes a compression plate made of a hard material, the melting point temperature of the compression plate is higher than the heat The temperature of the molten liquid, the compression plate is provided with compression holes corresponding to the plug teeth; the intermediate elastomer material is compressed so that the plug teeth are correspondingly inserted into the compression holes, and then communicates with the shaping cavity; the compression plate is composed of more than two The plates are assembled, and the compression holes are all set on the assembly seam.
3. The method for manufacturing a multi-layer product hot-melt connection structure according to claim 1, characterized in that a physical hot-melt connection structure is provided at an end of the plug teeth away from the first connecting body.
4. The method for manufacturing a multi-layer product hot-melt connection structure according to claim 3, characterized in that the physical connection structure is a connection counterbore provided on the side of the end of the plug tooth, or a wave tooth pattern, or Connect through holes.
5. The method for manufacturing a multi-layer product hot-melt connection structure according to claim 1, characterized in that the first connecting body is integrally injection-molded by an injection machine, or the intermediate body is integrally injection-molded by an injection machine, or The first connecting body and the intermediate body are integrally injection molded by the injection machine.
6. The method for manufacturing a multi-layer product hot-melt connection structure according to claim 1, characterized in that the radial cross section of the plug teeth is cylindrical, or triangular, or square, or arc, or long shape.
7. The method for manufacturing a multi-layer product hot-melt connection structure according to claim 1, wherein the intermediate body is a multilayer structure formed by lamination.
8. The method for manufacturing a multi-layer product hot-melt connection structure according to claim 1, characterized in that a single plug tooth corresponds to a single shaping cavity.
9. A method for manufacturing a multi-layer product hot-melt connection structure according to claim 1, characterized in that: more than two plug teeth form a connection group; a separate connection group corresponds to a separate shaping cavity, said The shaping cavity is connected with all the plug teeth in the corresponding connection group.
10. The method for manufacturing a multi-layer product hot-melt connection structure according to claim 1, wherein the mold is provided with only one shaping cavity, and the shaping cavity is simultaneously connected with all the plug teeth.
11. The method for manufacturing a multi-layer product hot-melt connection structure according to claim 1, wherein the intermediate body is a hollow cylindrical structure, and a plurality of connection holes are provided on the wall of the cylindrical structure.
12. The method for manufacturing a multi-layer product hot-melt connection structure according to claim 1, characterized in that: the lower end of the first connection body is provided with a first connection body bonding portion for bonding with an intermediate body, the first The lower surface of a connecting body fitting portion is provided with insertion teeth for inserting an intermediate body connecting hole; the first connecting body fitting portion is provided inside the lower end of the first connecting body wall and is adapted to the shape of the intermediate body The closed ring structure or the intermittent ring structure; the insertion teeth are arranged at equal intervals on the lower surface of the fitting portion of the first connecting body.
13. The method for manufacturing a multi-layer product hot-melt connection structure according to claim 12, characterized in that the intermediate body is provided with a side surface for accommodating the first connection body bonding portion for accommodating the first connection The first connecting body accommodating groove of the body fitting portion, the connecting hole is located in the first connecting body accommodating groove.
14. The method for manufacturing a multi-layer product hot-melt connection structure according to any one of claims 1-13, wherein a side surface of the intermediate body in contact with the hot-melt connection body is provided with an injection corresponding to the hot-melt connection body The receiving groove is used for inserting the corresponding hot-melt connecting body.
15. A method for manufacturing a multi-layer product hot-melt connection structure according to any one of claims 1-13, wherein the mold in step B is an injection mold, and the hot-melt connection body is injection molded by an injection machine.
16. A seat cushion, characterized in that the seat cushion includes an intermediate elastic layer as an intermediate body and a surface ornament layer of the first connector, the intermediate elastic layer is provided with a connecting hole, and the surface ornament layer is provided with plug teeth for insertion The teeth are inserted into the connection hole, and at the bottom of the middle elastic layer, there is a hot-melt connection body as a support structure for the cushion; the cushion is manufactured using the multi-layer product hot-melt connection structure according to any one of claims 1-15 Method for production.
17. A bicycle grip, characterized in that: the bicycle grip includes a hard supporting body as an intermediate body, the intermediate body is a hollow cylindrical structure; a surface decoration layer structure as a first connecting body; an intermediate body A number of connecting holes are provided, and the first connecting body is provided with a number of plug-in teeth; the plug-in teeth are inserted into the connecting holes; the bicycle grip is connected by the hot-melt of the multi-layer product according to any one of claims 1-15 In the process of production, the hot-melt connector is placed inside the intermediate body of the hollow cylindrical structure.

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