WO2021077499A1

WO2021077499A1 - Multi-color rubber belt body and manufacturing method therefor, and wearable device

Info

Publication number: WO2021077499A1
Application number: PCT/CN2019/118564
Authority: WO
Inventors: 李海波
Original assignee: 广东乐心医疗电子股份有限公司
Priority date: 2019-10-22
Filing date: 2019-11-14
Publication date: 2021-04-29
Also published as: CN110696278A

Abstract

A multi-color rubber belt body and a manufacturing method therefor, and a wearable device, relating to the field of rubber product processing. The manufacturing method for the multi-color rubber belt body is suitable for using a mold to manufacture the multi-color rubber belt body that comprises a belt body made of rubber having a first color and a second belt body made of rubber having other colors. The surface of the second belt body has a preset exposed surface and a belt body covering surface. The manufacturing method comprises: the second belt body is placed in a mold cavity of the mold, and a remaining space is formed around the second belt body; the exposed surface is attached to the mold, and the belt body covering surface is exposed in the remaining space; under the action of pressure, the raw material of the belt body is injected into the remaining space, so that the raw material of the belt body is vulcanized and molded to cover the belt body covering surface of the second belt body. By extruding and molding the belt body around the second belt body, the multi-color rubber belt body can be manufactured.

Description

Multicolor rubber belt body, preparation method thereof and wearable device

Cross-references to related applications

This disclosure claims the priority of the Chinese patent application filed with the Chinese Patent Office on October 22, 2019, with the application number 201911009161.6, titled "Multicolor Rubber Belt Body and its Preparation Method and Wearable Device".

Technical field

The present disclosure relates to the field of rubber product processing, and in particular, to a multi-color rubber belt body, a preparation method thereof, and a wearable device.

Background technique

The belts of wearable devices such as high-end smart watches and sports bracelets are generally made of rubber materials. However, due to the difficult molding process of rubber belts with more than two colors, the belts of common high-end smart watches and sports bracelets are commonly used for wearable devices. Single color.

Summary of the invention

The purpose of the embodiments of the present disclosure is, for example, to provide a multi-color rubber belt body, a preparation method thereof, and a wearable device.

The embodiments of the present disclosure are implemented as follows:

The embodiments of the present disclosure provide a method for preparing a multi-color rubber belt body, which is suitable for preparing a multi-color rubber including a belt body made of a first color rubber and a second belt body made of other colors using a mold. Belt body; the surface of the second belt body has a preset exposed surface and a covered surface of the belt body;

The preparation method includes:

Place the second belt body in the cavity of the mold, and there is a remaining space around the second belt body; the exposed surface is attached to the mold, and the cover surface of the belt body is exposed in the remaining space;

Under the action of pressure, the raw material of the belt body is injected into the remaining space, so that the raw material of the belt body is vulcanized and wrapped on the covering surface of the belt body of the second belt body.

By extruding and molding the belt body around the second belt body, a multi-colored rubber belt body can be manufactured. The preparation method is simple and feasible, and the molding effect is good.

Optionally, before the step of placing the second belt body in the cavity of the mold, it further includes: selecting a mold that matches the structure of the second belt body, so that the second belt body is placed in the mold of the mold. When in the cavity, a narrow gap communicating with the remaining space can be formed between a part of the cover surface of the belt body and the bottom wall of the cavity.

By arranging the slit, the pressure can be greatly reduced when a part of the raw material of the belt body squeezed into the cavity moves in the direction close to the second belt body along the slit, thereby avoiding glue overflow, color crossover and the belt body. The problem of deformation.

Optionally, the distance between the covering surface of the belt body forming the slit and the bottom wall of the cavity is 0.05 mm to 3 mm.

The distance between the cover surface of the belt body forming the slit and the inner surface of the mold is 0.05 mm to 3 mm, which can prevent the second belt body from being deformed under the extrusion of the raw material of the belt body and being not straight.

Optionally, the distance from the inlet connecting the narrow slot with the remaining space to the bottom end of the narrow slot is 0.5 mm to 3 mm.

When the belt body is formed, the raw material of the belt body is prone to invade at the junction of the second belt body (soft material) and the mold (steel, hard material), causing glue overflow, color crossover, and sawtooth. The extension distance of the belt body covering surface extending to the entrance of the cavity is 0.5mm~3mm, so that the pressure of the belt body raw material after passing through the slender slit will be greatly reduced, which can improve the undesirable phenomena such as glue overflow, cross color and sawtooth.

Optionally, the bottom wall of the above-mentioned cavity includes a first area and a second area sunk relative to the first area;

When the second belt body is placed in the cavity of the mold, part of the exposed surface is attached to the first area, and part of the belt body covering surface corresponds to the second area with a gap between them to form the slit.

Part of the belt body covering surface extends to the second area and forms a narrow gap with the inner surface of the second area. The exposed surface adjacent to the belt body covering surface is attached to the inner surface of the first area to ensure the final multicolor The two colors of the outer surface of the rubber belt are well connected, and there is no cross-color.

Optionally, the second belt body has a first surface and a second surface opposite to each other, and the exposed surface on the second surface is convex from the first surface to the second surface relative to the adjacent belt body covering surface on the second surface. Out

When the second belt body is placed in the cavity of the mold, a narrow gap is formed between the covering surface of the belt body on the second surface and the inner wall of the cavity; the exposed surface on the second surface is attached to the inner surface of the cavity .

When the second belt body is placed in the cavity of the mold, a narrow gap is formed between the covering surface of the part of the belt body and the inner surface of the cavity; the exposed surface is attached to the inner surface of the cavity to ensure that the final multi-color rubber belt body is obtained The two colors of the outer surface are well connected, and there is no cross-color.

Optionally, before the step of placing the second belt body in the cavity of the mold, the method further includes: selecting a second belt body with a ring-shaped protrusion extending along the periphery of the second belt body on the exposed surface and a second belt body capable of interacting with Moulds for protrusions and grooves;

When the second belt body is placed in the cavity of the mold, the protrusion snaps into the groove.

When forming the belt body, the raw material of the belt body is prone to invade at the junction of the second belt body (soft material) and the mold (steel, hard material), causing glue overflow, color crossover, and sawtooth. By setting the protrusions, the intrusion of the raw material of the belt body can be prevented, thereby improving the undesirable phenomena such as glue overflow, cross color, and sawtooth.

Optionally, the above step of injecting the raw material with the main body into the remaining space includes:

The raw material of the belt body is injected into the remaining space along a direction perpendicular to the side wall of the second belt body and vulcanized to form.

The raw material of the belt body is injected in a direction perpendicular to the side wall of the second belt body, and the belt body can be completely formed around the second belt body.

Optionally, the side wall of the second belt body has a slope;

Optionally, the height of the slope surface is 1/2 to 2/3 of the overall height of the side wall.

By setting the slope, the raw material of the belt body is prevented from directly hitting the side wall of the second belt body, so that the raw material of the belt body is sequentially filled and molded along the slope from top to bottom, and the molding effect is better.

Optionally, the above-mentioned second belt body is provided with a pre-compression amount of 0.05 mm to 0.3 mm high.

By setting the amount of compression, sufficient pre-pressure can be generated after the mold is closed to further prevent the occurrence of glue overflow.

Optionally, the hardness of the second belt body and the belt body after vulcanization are both in the range of 60-80 Shore hardness.

Lower or higher hardness ranges will affect the wearing comfort of the belt body and the belt body forming yield.

Optionally, the pressure for injecting the raw material with the main body into the remaining space and vulcanizing and molding is 30 tons to 100 tons; and the vulcanization time is 4-8 minutes.

Within the above range, the molding effect is good, too much pressure will cause glue overflow; too little pressure can not be molded.

The embodiment of the present disclosure also provides a method for preparing a multi-color rubber belt body, which is suitable for preparing a first belt body made of rubber of a first color and a second belt body made of rubber of a second color by using a mold. The multi-color rubber belt body; the surface of the second belt body has a connected exposed surface and a covering surface of the belt body;

The preparation method includes:

The belt body raw material is injected into the remaining space jointly defined by the belt body covering surface and the inner surface of the mold cavity, so that the belt body raw material is vulcanized and formed and only wrapped outside the belt body covering surface.

In the second aspect, embodiments of the present disclosure provide a multi-color rubber belt body, including:

The second belt body has an exposed surface and a belt body covering surface; and

The belt body is arranged around the second belt body and covers the covering surface of the belt body;

The second belt body has a first surface and an opposite second surface;

The exposed surface is located on the first surface and the second surface; the belt body covering surface includes the side wall of the second belt body, part of the first surface and part of the second surface.

Optionally, the exposed surface on the second surface is flush with the covering surface of the belt body around it, and the covering thickness of the belt body on part of the second surface is 0.05 mm to 3 mm.

Optionally, the second surface has a second protruding portion, the end surface of the second protruding portion facing away from the first surface is a bare surface on the second surface, and the thickness of the belt body covering part of the second surface is 0.05mm~ 3mm.

Optionally, the above-mentioned first surface has a first protruding portion, and an end surface of the first protruding portion facing away from the second surface is an exposed surface on the first surface.

Optionally, the distance covered by the belt body on the second surface from the edge of the side wall of the second belt body inward is 0.5 mm to 3 mm.

Optionally, the side wall of the second belt body has a slope, and the slope is connected to the first surface.

Optionally, the side of the slope surface away from the first surface is spaced from the second surface.

Optionally, the height of the above-mentioned slope surface is 1/2 to 2/3 of the overall height of the side wall of the second belt body.

Optionally, the hardness of the second belt body and the belt body are both in the range of 60-80 Shore hardness.

Optionally, a plurality of through holes are provided on the above-mentioned exposed surface.

Optionally, the first surface has a first protruding part, the first protruding part is provided with a through hole, and the through hole penetrates the first protruding part and the second belt at the same time, and the through hole is located far away from the port of the second belt. The first protruding part is away from the end face of the first surface.

Optionally, the hole walls of the plurality of through holes all protrude from the first surface to form a first protruding part.

In a third aspect, the present disclosure provides a wearable device. The wearable device includes the above-mentioned multi-color rubber belt body and a device body, and the rubber belt body is connected to the device body.

Optionally, the device body includes a watch body or a sports bracelet body, and the multi-color rubber band body is connected to the watch body or the sports bracelet body.

Description of the drawings

In order to explain the technical solutions of the embodiments of the present disclosure more clearly, the following will briefly introduce the drawings that need to be used in the embodiments. It should be understood that the following drawings only show certain embodiments of the present disclosure, and therefore do not It should be regarded as a limitation of the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative work.

FIG. 1 is a schematic view of the structure of a multi-color rubber belt provided by an embodiment of the present disclosure from a first perspective;

2 is a schematic view of the structure of a multi-color rubber belt provided by an embodiment of the present disclosure from a second perspective;

FIG. 3 is a schematic diagram of a process for preparing a second belt provided by an embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of a second belt manufactured according to an embodiment of the present disclosure;

5 is a schematic diagram of the first process of forming a belt body around a second belt body according to an embodiment of the present disclosure;

6 is a schematic diagram of the raw material injection direction of the belt body when the belt body is prepared according to the embodiment of the present disclosure;

7 is a partial schematic diagram of the first process of forming a belt body around a second belt body according to an embodiment of the present disclosure;

8 is a partial schematic diagram of a second process of forming a belt body around a second belt body according to an embodiment of the present disclosure;

FIG. 9 is a partial schematic diagram of a third process of forming a belt body around a second belt body according to an embodiment of the present disclosure.

Icon: 100-multicolor rubber belt body; 110-belt body; 120-second belt body; 121-through hole; 123-first surface; 1231-first protruding part; 124-side wall; 1241-slope 125-protrusion; 126-exposed surface; 127-with body covering surface; 128-second surface; 129-second surface; 1291-second protruding part; 130-first mold; 131-lower mold; 132- Upper mold; 140-second mold; 141-cavity; 1412-first area; 1413-second area; 142-remaining space; 143-slit; 1431-slit entrance; 1432-slit bottom end 144-upper template; 145-lower template; 1451-groove; 146-middle template; 1461-nozzle; 150-raw material with body; 160-preset connection interface; 170-contact gap.

Detailed ways

In order to make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments These are a part of the embodiments of the present disclosure, but not all of the embodiments. The components of the embodiments of the present disclosure generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

Therefore, the following detailed description of the embodiments of the present disclosure provided in the accompanying drawings is not intended to limit the scope of the claimed present disclosure, but merely represents selected embodiments of the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present disclosure.

It should be noted that similar reference numerals and letters indicate similar items in the following figures. Therefore, once a certain item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

In the description of the embodiments of the present disclosure, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, or It is the orientation or positional relationship that the product of the application is usually placed in use, or the orientation or positional relationship that is commonly understood by those skilled in the art, only for the convenience of describing the present disclosure and simplified description, rather than indicating or implying the equipment or The element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure.

In addition, the terms "first", "second", "third", etc. are only used for distinguishing description, and cannot be understood as indicating or implying relative importance.

In the description of the embodiments of the present disclosure, it should also be noted that, unless otherwise clearly specified and limited, the terms “setup”, “installation”, “connected”, and “connected” should be understood in a broad sense, for example, they may be fixed The connection may also be a detachable connection or an integral connection; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above-mentioned terms in the present disclosure can be understood in specific situations.

The present disclosure provides a method for preparing a multicolor rubber belt body, which is suitable for preparing a multicolor rubber belt including a first belt body made of rubber of a first color and a second belt body made of rubber of a second color by using a mold body.

Due to its own performance and structural characteristics, the rubber material can be molded into any shape. Compared with ordinary rubber, fluorine rubber has poor fluidity and requires longer vulcanization time. It is usually extruded by mold.

Therefore, the method for preparing a multi-color rubber belt body provided by the present disclosure is particularly suitable for using a mold to extrude a first belt body made of fluororubber of a first color and a second belt made of fluororubber of a second color. Body with multi-color rubber band body.

It should be noted that the above-mentioned first color is different from the above-mentioned second color. For example, when red is selected as the first color, blue can be selected as the second color, so that a multi-color rubber belt body having at least two colors can be manufactured. The multi-color rubber belt body prepared by the preparation method of the multi-color rubber belt body provided by the present disclosure can be applied to products such as high-end smart watches and sports bracelets, and has a wide range of applications.

In addition, it should be noted that in the present disclosure, the first belt body can also be named the belt body, and the second color can also be named other colors. The colors of the first color and the second color are different. It should be understood that both the first color and the second color may be primary colors, or may be colors formed by a combination of multiple primary colors.

1-9, a method for preparing a multicolor rubber belt 100 provided by the present disclosure includes the following steps:

Step S1: Prepare the second belt body 120.

3 and 4, the first mold 130 is used to prepare the second belt body 120. One color of raw rubber material (for example, blue rubber raw material) is selected, the raw material is placed in the lower mold 131, and the upper mold 132 is closed. The entire first mold 130 is placed on a hydraulic machine to pressurize. Under the action of the pressure, the upper mold 132 and the lower mold 131 are close to each other, and the rubber raw material fills the cavity formed by the upper mold 132 and the lower mold 131 and is vulcanized.

4, in the present disclosure, a plurality of through holes 121 are opened on the second belt body 120, and the hole wall of each through hole 121 protrudes from the first surface 123 of the second belt body 120, and a plurality of protrusions protrude The wall of the hole forms a first protruding portion 1231.

Optionally, referring to FIG. 4, in the present disclosure, the second belt body 120 is a long strip, the second belt body 120 has a first surface 123, and the first surface 123 is provided along the length direction of the second belt body 120. A plurality of first protruding portions 1231 are arranged evenly at intervals. The second belt body 120 is provided with a plurality of through holes 121, the number of the plurality of through holes 121 and the plurality of first protruding portions 1231 are equal in number and one-to-one correspondence, and each through hole 121 penetrates the corresponding first protruding portion 1231 A port of each through hole 121 away from the first surface 123 extends to an end surface of the first protruding portion 1231 away from the first surface 123.

Optionally, when the second belt body 120 is formed, a pre-compressed amount with a height of 0.05 mm to 0.3 mm is set, and the height direction of the pre-compressed amount is perpendicular to the plane where the first surface 123 is located.

Exemplarily, when the second belt body 120 with a preset height of 2 mm is prepared (that is, the cavity height of the first mold 130 configured to extrude the second belt body 120 is 2 mm), the first mold 130 Adding raw material exceeding 2mm height (for example, adding raw material of 2.3mm height) into the cavity, so that the height of the second belt body 120 is 2.3mm, which has a pre-compression amount of 0.3mm height, and the belt body is subsequently formed When the mold is closed, sufficient pre-pressure can be generated to prevent glue overflow.

In the present disclosure, optionally, the above-mentioned second belt body 120 may not be provided with the through hole 121.

Referring to FIGS. 3 to 4, the cavity of the lower mold 131 of the first mold 130 can form a second belt body 120 with a certain slope on the side wall.

Optionally, the side walls 124 around the second belt body 120 are all provided with a slope 1241. In other words, the side walls 124 around the second belt body 120 and the first surface 123 are connected by a slope 1241, so that A chamfer is formed between the side wall 124 and the first surface 123. Optionally, referring to FIGS. 3 to 4, the height of the slope surface 1241 is 1/2 to 2/3 of the overall height of the side wall 124. Exemplarily, the height of the slope 1241 on the peripheral side wall of the second belt body 120 is 1/2, 11/20, 7/12, 3/5 or 2/3 of the overall height of the side wall 124.

With this structure design, when the belt body 110 is subsequently formed around the second belt body 120, the injected belt body raw material 150 can be sequentially filled in the cavity to form the belt body 110 along the slope from top to bottom, avoiding the belt body 110. The main body raw material 150 directly hits the side wall 124 of the second belt 120 from the injection direction, thereby improving the molding quality.

Optionally, referring to FIG. 8, the second surface 129 of the second belt 120 can be shaped into a stepped shape, so that the second surface 129 of the part close to the edge sinks relative to the remaining second surface 129, even if the second surface 129 is The second surface 129 of the part of the belt 120 close to the side wall 124 sinks relative to the remaining second surface 129, and the second surface 129 of the part of the second belt 120 close to the side wall 124 is higher than the other second surfaces 129 height. Optionally, select a suitable mold and follow the aforementioned molding process to form.

Optionally, referring to FIG. 9, a ring of rib-shaped protrusions 125 is formed on the second surface 128 of the second belt body 120. Optionally, select a suitable mold and follow the aforementioned molding process to form.

Optionally in the present disclosure, the above-mentioned second belt 120 may also be obtained through purchase.

Step S2, forming a rubber belt body 110 of the first color (for example, yellow) around the second belt body 120.

Optionally, referring to FIGS. 5 to 9, the second mold 140 configured to form the belt body 110 is selected. The second mold 140 has a cavity 141 capable of accommodating the second belt body 120 and the belt body 110 at the same time.

The second belt body 120 produced in step S1 is placed in the cavity 141 of the second mold 140, and there is a remaining space 142 around the second belt body 120.

Optionally, the surface of the second belt body 120 produced in step S1 has a preset exposed surface 126 and a belt body covering surface 127.

It should be noted that the above-mentioned exposed surface 126 refers to the surface of the second belt body 120 that is not covered by the belt body 110 after the belt body 110 is formed around the second belt body 120; the above-mentioned belt body covering surface 127 refers to the belt body 110 After the body 110 is formed around the second belt body 120, the surface of the second belt body 120 covered by the belt body 110.

Optionally, the exposed surface 126 of the second belt body 120 is attached to the second mold 140, and the belt body covering surface 127 is exposed in the remaining space 142. In other words, the second belt body 120 is placed in the cavity 124. , The exposed surface 126 is attached to the inner surface of the cavity 124 to prevent the belt body raw material 150 from being injected, and the belt body covering surface 127 of the second belt body 120 and the inner surface of the cavity 124 together define a remaining space 142 for the belt The main body raw material 150 is filled and vulcanized and molded on the belt main body covering surface 127. Under the action of the clamping pressure, the belt body raw material 150 is injected into the remaining space 142, so that the belt body raw material 150 is vulcanized and wrapped around the belt body covering surface 127 of the second belt body 120.

5-7, optionally, select a second mold 140 that is compatible with the second belt 120, so that when the second belt 120 is placed in the cavity 141 of the second mold 140, part of the A narrow slit 143 communicating with the remaining space 142 can be formed between the covering surface 127 of the belt body 110 and the inner surface of the cavity 141. The narrow slit 143 is an annular structure surrounding the circumference of the second belt body 120.

At present, when the belt body is molded, the raw material of the belt body is prone to intrusion at the junction of the second belt body (soft material) and the mold (steel, hard material), and defects such as glue overflow, color crossover, and sawtooth occur.

For fluororubber materials, when extrusion molding is used, the extrusion pressure is higher, and defects such as cross-color and glue overflow are more likely to occur. The method for preparing multi-color rubber belts provided in the present disclosure is more suitable for preparing multi-color rubber belts. The rubber belt body can improve the defects such as cross-color, rubber overflow and sawtooth when preparing multi-color fluorine rubber. In other words, by providing the aforementioned slits 143, during the process of extruding the belt body raw material 150 into the remaining space 142 by the clamping force of the mold, the belt body raw material 150 not only covers the second belt body Outside of the side wall 120, it can also enter between the bottom wall of the second belt body 120 and the bottom surface of the cavity 141. After the belt body raw material 150 is combined with the second belt body 120, a part of the second belt body 120 is The main body 110 extends inside, so that when the raw material 150 with the main body fills the remaining space 142, the pressure of the raw material 150 with the main body 150 after passing through the elongated slit 143 is greatly reduced, which can improve the problems of glue overflow, color crossover, and sawtooth. .

Optionally, referring to FIGS. 7 and 8, the distance d1 between the belt body covering surface 127 forming the slit 143 and the inner surface of the second mold 140 is 0.05 mm to 3 mm. Within this range, not only can the undesirable phenomena such as glue overflow, cross-color and jaggedness be effectively improved, but also the second belt body 120 can be prevented from being deformed under the extrusion of the belt body raw material 150 and becoming not straight.

Optionally, the value of the distance d1 between the belt body covering surface 127 forming the slit 143 and the bottom surface of the cavity 141 can be selected to be 0.05 mm to 1 mm; or the belt body covering surface 127 forming the slit 143 and the cavity 141 The value of the distance d1 between the bottom surfaces of the can be selected from 0.05mm to 0.5mm; or the value of the distance d1 between the above-mentioned belt body covering surface 127 forming the slit 143 and the bottom surface of the cavity 141 can be selected from 0.05mm to 0.1mm . Optionally, referring to FIGS. 6-8, the extension distance d2 from the entrance 1431 of the slit to the bottom end 1432 of the slit is 0.5 mm to 3 mm. Within the above range, the pressure after the raw material 150 with the main body is injected can be greatly reduced, and the undesirable phenomena such as glue overflow, color crossover, and sawtooth can be effectively improved.

Optionally, the value of the extension distance d2 from the inlet 1431 of the slit to the bottom end 1432 of the slit can be selected to be 0.5 mm to 1 mm; or the extension distance d2 from the inlet 1431 of the slit to the bottom end 1432 of the slit The value can be selected from 0.6 mm to 2 mm; or the value of the extension distance d2 from the entrance 1431 of the slit to the bottom end 1432 of the slit can be selected from 0.8 mm to 1.5 mm.

Please refer to FIGS. 5 to 7, the second mold 140 that is selected to be compatible with the second belt 120 includes an upper mold 144, a lower mold 145 and a middle mold 146 arranged in sequence. The middle mold plate 146 and the lower mold plate 145 jointly define a cavity 141 in which the second belt body 120 can be placed and the belt body 110 can be formed. The middle mold plate 146 is configured to place the raw material 150 with the main body, and a nozzle 1461 is opened on the middle mold plate 146. The raw material 150 with the main body can be extruded from the nozzle 1461 and then follows the contact gap between the middle mold plate 146 and the lower mold plate 145. 170 is injected into the cavity 141 defined by the lower mold plate 145 and the middle mold plate 146. The upper mold plate 144 can cover the middle mold plate 146 and approach the middle mold plate 146 under the action of external force to squeeze the raw material 150 with the main body on the middle mold plate 146. At this time, the exposed surface 126 of the second belt body 120 is attached to the surface of the middle template 146 facing the lower template 145, that is, the exposed area of the first surface 123 of the second belt body 120 is attached to the middle template 146, and the second belt The exposed area of the second surface 128 of the body 120 is attached to the lower template 145. When the raw material 150 with the main body is squeezed into the cavity 141, the exposed area of the second belt 120 is attached to the middle template 146 and the lower template 145 at the same time. Therefore, the belt body raw material 150 cannot cover the position where the second belt body 120 is attached to the middle template 146 and the lower template 145, so that the outer surface of the finally formed multi-color rubber belt body 100 includes the second belt body 120 The bare face 126. Optionally, the belt body covering surface 127 is exposed in the remaining space 142, that is, the side wall 124 of the second belt body 120 faces the remaining space 142 and is exposed in the remaining space 142, so that when the belt body raw material 150 is squeezed into the cavity 141 When inside, since the side wall 124 of the second belt body 120 is exposed in the remaining space 142, the belt body raw material 150 can directly cover the side wall 124 of the second belt body 120 and the belt body covering surface 127, and finally form Around the circumference of the second belt body 120 and part of the bottom of the second belt body 120, the outer surface of the finally formed multi-color rubber belt body 100 does not include the belt body covering surface 127.

Optionally, the bottom wall of the cavity 141 opened on the lower mold plate 145 is stepped, so that the bottom wall of the cavity 141 includes a first area 1412 and a second area 1413 that is sunken relative to the first area 1412.

When the second belt body 120 is placed in the cavity 141 of the second mold 140, the bottom wall part of the second belt body 120 is attached to the first area 1412, and the remaining part extends to the second area 1413 and forms part of the belt body A slit 143 is formed between the covering surface 127 and the second area 1413. When the belt body raw material 150 is injected into the remaining space 142, it can flow along the narrow slit 143 and cover the surface of the belt body covering surface 127 of the second belt body 120, and finally vulcanize and shape.

Optionally, the sinking distance of the second area 1413 relative to the first area 1412 is 0.05 mm to 3 mm. For example, the sinking distance of the second region 1413 with respect to the first region 1412 is 0.05 mm, 0.1 mm, 1.5 mm, 2.0 mm, 2.5 mm, or 3 mm.

Optionally, the side wall 124 of the second belt body 120 extends toward the inside of the belt body 110, and optionally, the extension distance is 0.5 mm to 3 mm. Since part of the sidewall of the second belt body 120 extends into the belt body 110, the second belt body 120 that extends into the belt body 110 forms a certain barrier, so that the belt body of the multi-color rubber belt body 100 is finally manufactured. The preset connection interface 160 of the 110 and the second belt body 120 does not have such problems as cross-color, glue overflow, and sawtooth.

In the present disclosure, the exposed surface 126 protrudes toward the bottom wall of the cavity 141 relative to the adjacent belt body covering surface 127. When the second belt body 120 is placed in the cavity 141 of the second mold 140, a slit 143 is formed between the part of the belt body covering surface 127 and the inner surface of the cavity 141; the exposed surface 126 is attached to the inner surface of the cavity 141.

By placing the second belt body 120 in the cavity 141 of the second mold 140, a slit 143 is formed between the part of the belt body covering surface 127 and the inner surface of the cavity 141; the exposed surface 126 is attached to the inner surface of the cavity 141, It is ensured that the two colors of the outer surface of the finally obtained multi-color rubber belt body 100 are well connected without cross-color.

Optionally, referring to FIG. 8, the second surface 129 of the second belt body 120 has a second protruding portion 1291. The second protruding portion 1291 protrudes by a height d1 relative to the second surface 129, so that a slit is formed between the second surface 129 of the second belt body 120 where the second protruding portion 1291 is not provided and the inner surface of the cavity 141 143. Optionally, the protrusion height d1 is 0.05 mm to 3 mm. For example, the protrusion height d1 of the second protruding portion 1291 relative to the second surface 129 is 0.05 mm, 0.1 mm, 0.5 mm, 1.0 mm, 2.5 mm, or 3 mm.

Since the second protruding portion 1291 protrudes relative to the second surface 129, a slit 143 is formed between part of the second surface 129 of the second belt body 120 and the inner surface of the cavity 141 of the second mold 140. When the main body raw material 150 is injected, the pressure along the narrow slit 143 is gradually reduced, so that problems such as cross-color and glue overflow after molding can be effectively avoided.

In the present disclosure, a part of the sidewall of the second belt body 120 extends to the inside of the belt body 110. During the process of the belt body raw material 150 being extruded into the cavity 141, the connecting interface 160 of the belt body 110 and the second belt body 120 is directed toward The internal movement of the belt body 110 reduces the impact of the belt body raw material 150 on the second belt body 120. At the same time, since part of the second surface 129 of the second belt body 120 and the inner surface of the cavity 141 have a narrow slit 143, The slit 143 has a buffering effect on the raw material 150 with the main body squeezed into the cavity 141, and avoids problems such as cross-color, glue overflow, and sawtooth on the connection interface 160 preset in the final product.

In the present disclosure, optionally, before the step of placing the second belt 120 in the cavity 141 of the second mold 140, the method further includes: selecting the second belt 120 with protrusions 125 on the exposed surface 126 and The second mold 140 of the groove 1451 engaged with the protrusion 125. Optionally, the protrusion 125 protrudes from the edge of the second belt body 120.

Optionally, the protrusion 125 protrudes from the surface of the second belt body 120 away from the first surface 123 along the thickness direction of the second belt body 120, and a groove 1451 is provided on the inner bottom wall of the lower mold 145.

When the second belt body 120 is placed in the cavity 141 of the second mold 140, the protrusion 125 is locked into the groove 1451.

When forming the belt body, the raw material of the belt body is prone to invade at the junction of the second belt body (soft material) and the mold (steel, hard material), resulting in defects such as glue overflow, color crossover, and sawtooth. By providing the protrusion 125, the intrusion of the raw material 150 with the main body can be prevented, and the extrusion pressure is gradually reduced. When the raw material 150 with the main body reaches the predetermined connection interface 160 of the final product, the pressure is greatly reduced, thereby avoiding the final product The default connection interface 160 has problems such as cross-color, glue overflow, and sawtooth.

9, a ring of rib-shaped protrusions 125 is provided on the edge of the second surface 128 of the second belt body 120. In other words, the second surface 128 of the second belt body 120 is provided with annular protrusions 125. , The protrusion 125 protrudes from the second surface 128 in the direction from the first surface 123 to the second surface 128, and the protrusion 125 extends around the circumference of the second belt 120. Correspondingly, an annular shape is provided on the inner bottom wall of the cavity 141. The groove 1451. Place the second belt body 120 with rib-like protrusions 125 in the cavity 141, the second surface 128 of the second belt body 120 contacts the inner bottom wall of the cavity 141, and a mold with grooves 1451 is selected , So that the rib-shaped protrusion 125 of the second belt body 120 is accommodated in the groove 1451 and is attached to the inner wall of the groove 1451. That is, a groove 1451 is provided on the lower template 145, and the rib-shaped protrusion 125 of the second belt body 120 is clamped into the groove 1451. During molding, the belt body raw material 150 is injected into the cavity 141, and the rib-shaped protrusions 125 are used for sealing, and finally the belt body 110 is vulcanized and molded around the second belt body 120. After the forming is completed, the rib-shaped protrusions 125 of the second belt body 120 are polished off. There will be no rib-shaped protrusions 125 on the final multi-color rubber belt 100, and because the rib-shaped protrusions 125 block the belt body raw material 150 during the extrusion process, the final product is There will be no problems such as cross-color, glue overflow, and sawtooth.

Optionally, the step of injecting the raw material 150 with the main body into the remaining space 142 includes:

The raw material 150 of the belt body is injected into the remaining space 142 of the cavity 141 along a direction perpendicular to the side wall 124 of the second belt body 120 and vulcanized.

In the present disclosure, referring to FIG. 6, when the belt body raw material 150 is injected into the cavity 141, the belt body raw material 150 is perpendicular to the second belt along the contact gap 170 between the middle template 146 and the lower template 145. The direction of the side wall 124 of the body 120 is incident (the direction indicated by the arrow in FIG. 6). Since the side wall 124 of the second belt body 120 is provided with a slope, when the belt body raw material 150 is injected into the cavity 141, it can slide down along the slope of the side wall 124 of the second belt body 120. That is, slide down from the first surface 123 of the second belt body 120 to the second surface 128, so that the belt body raw material 150 can sequentially fill the cavity 141 from top to bottom, so as to prevent the belt body raw material 150 from directly hitting the second belt The side wall 124 of the body 120 can greatly improve the molding quality.

7-9, the raw material 150 with the main body is injected along the direction perpendicular to the side wall 124 of the second belt 120. When the belt body raw material 150 is injected into the cavity 141, the belt body raw material 150 is moved along the contact gap 170 between the middle mold plate 146 and the lower mold plate 145 in a direction perpendicular to the side wall 124 of the second belt body 120 Injection.

Optionally, the side wall 124 of the second belt body 120 shown in FIG. 9 may be provided with a certain slope according to actual needs.

Optionally, the hardness of the second belt body 120 and the belt body 110 after vulcanization are both in the range of 60°-80° (Shore hardness).

Exemplarily, the hardness of the second belt body 120 and the belt body 110 after vulcanization are both 60°; or the hardness of the second belt body 120 and the belt body 110 are both 70° after vulcanization; or the second belt body 120 and the belt body 110 The hardness of 110 after vulcanization is both 60°; or the hardness of the second belt body 120 and the belt body 110 after vulcanization are both 80°.

According to implementation needs, optionally, the hardness of the second belt body 120 and the belt body 110 after vulcanization may be set to be different. For example, the hardness of the second belt body 120 after vulcanization is set to 60°, and the belt body 110 is vulcanized. The later hardness is set to 65°.

By making the hardness of the second belt body 120 and the belt body 110 after vulcanization are in the range of 60°～80°, the hardness of the manufactured multi-color rubber belt body 100 is ensured, and the structural reliability, comfort and molding yield are ensured . Lower or higher hardness ranges will affect the wearing comfort of the belt body and the belt body forming yield.

Optionally, the pressure for injecting the raw material 150 with the main body into the remaining space 142 of the cavity 141 and vulcanizing is 30 tons to 100 tons; the vulcanization time is 4-8 minutes.

Exemplarily, the raw material 150 with the main body is injected into the remaining space 142 of the cavity 141 and the pressure for vulcanization molding is 30 tons, and the curing time is 8 minutes; or the raw material 150 with the main body is injected into the remaining space 142 of the cavity 141 and The vulcanization molding pressure is 100 tons and the vulcanization time is 4 minutes; or the raw material 150 with the main body is injected into the remaining space 142 of the cavity 141 and the vulcanization molding pressure is 50 tons, and the vulcanization time is 5 minutes.

In the present disclosure, the aforementioned step S2 can be repeated, and then a third color rubber belt body can be molded around the outer periphery of the belt body 110, so as to obtain a three-color rubber belt body. Of course, according to actual needs, the aforementioned step S2 can also be repeated multiple times to produce rubber belts of more colors.

The present disclosure also provides a multi-color rubber belt 100, which can be prepared by the method for preparing the multi-color rubber belt provided in the foregoing embodiment.

1 to 7, the multi-color rubber belt body 100 includes: a second belt body 120 and a belt body 110. The second belt body 120 has an exposed surface 126 and a belt body covering surface 127. The belt body 110 is arranged around the second belt body 120 and covers the belt body covering surface 127.

Optionally, the second belt 120 has a first surface 123 and an opposite second surface 128; the exposed surface 126 is located on the first surface 123 and the second surface 128 at the same time.

The belt body covering surface 127 includes a side wall 124 of the second belt body, a part of the first surface 123 and a part of the second surface 128 connected in sequence. In other words, part of the belt body covering surface 127 on the first surface 123 is set as the portion on the first surface 123 that is not occupied by the first protruding portion 1231; the belt body covering surface 127 on the second surface 128 is set as the first The two surfaces 128 and the inner bottom wall of the cavity 141 form a part of the slit 143.

Optionally, the belt body 110 covers the second surface 128 from the edge of the side wall 124 of the second belt body 120 inward by a distance of 0.5 mm to 3 mm, that is, the belt body 110 covers the second surface 128 in a direction perpendicular to the side wall 124. The width on the second surface 128 is 0.5 mm to 3 mm. This distance is the distance indicated by d2 in Figs. 7 and 8, that is, d2=0.5mm-3mm.

Optionally, the side wall 124 of the second belt body 120 has a slope surface 1241, one side of the slope surface 1241 is connected to the first surface 123, and the other side of the slope surface (the side away from the first surface) is connected to the second surface. There is an interval between 128. In other words, one side of the slope surface 1241 intersects the first surface 123, and the opposite side of the slope surface 1241 starts from the intersection and extends toward the second surface 128 in a downslope manner.

Optionally, the height of the slope surface 1241 is 1/2 to 2/3 of the overall height of the side wall 124 of the second belt body 120, wherein the height of the slope surface 1241 and the height of the side wall 124 are perpendicular to the first surface. 123 direction.

In other words, the slope surface 1241 extends from the first surface 123 toward the second surface 128 in a downslope manner and extends from 1/2 to 2/3 of the overall height of the side wall 124 of the entire second belt body 120.

Optionally, the hardness of the second belt body 120 and the belt body 110 are both in the range of 60-80 Shore hardness.

Optionally, the first surface 123 is provided with a plurality of through holes 121.

Optionally, the hole walls of the plurality of through holes 121 all protrude from the first surface 123 to form a first protruding portion 1231. In other words, a plurality of first protruding portions 1231 are provided on the exposed surface 126, and the plurality of first protruding portions 1231 are arranged at even intervals along the length direction of the second belt 120. The numbers of the through holes 121 and the first protruding portions 1231 are equal and one-to-one. Each through hole 121 penetrates the corresponding first protruding portion 1231, and each through hole 121 is away from a port of the first surface 123 Extend to the end surface of the first protruding portion 1231 away from the first surface 123.

With reference to Figure 1, Figure 2, Figure 4 and Figure 7, optionally, the exposed surface 126 on the second surface 128 is flush with the surrounding belt body covering surface 127, and the thickness of the belt body 110 on a part of the second surface 128 It is 0.05mm～3mm. That is, d1=0.05mm～3mm in Fig.7. Optionally, the end surface of the first protruding portion 1231 on the first surface 123 facing away from the first surface 123 (that is, the outer surface of the protruding hole wall of the plurality of through holes 121) is an exposed surface 126.

In the present disclosure, with reference to FIGS. 1, 2, 4, and 8, the second surface 129 has a second protruding portion 1291, and the end surface of the second protruding portion 1291 facing away from the second surface 129 is an exposed surface 126 with a body 110 The covering thickness of part of the second surface 129 is 0.05 mm to 3 mm. Refer to Figure 8, that is, in Figure 8 d1 = 0.05mm ~ 3mm.

The present disclosure also provides a wearable device, which includes a device body and the multi-color rubber belt body provided above. The rubber belt body is connected to the device body.

For example, as a wearable device, a smart watch includes a watch body and a multi-color rubber band body, and the multi-color rubber band body is connected to the watch body; a sports bracelet as a wearable device includes a bracelet body and a multi-color rubber band The body, the multi-color rubber belt body is connected to the body of the bracelet.

The foregoing descriptions are only preferred embodiments of the present disclosure and are not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Industrial applicability:

In summary, the present disclosure provides a multi-color rubber belt body, a preparation method thereof, and a wearable device, and the multi-color rubber belt body has high molding quality.

Claims

A method for preparing a multi-color rubber belt body, characterized in that it is suitable for preparing a multi-color rubber belt body including a belt body made of rubber of a first color and a second belt body made of rubber of other colors by using a mold; The surface of the second belt body has a preset exposed surface and a belt body covering surface;

The preparation method includes:

The second belt body is placed in the cavity of the mold, and there is a remaining space around the second belt body; the exposed surface is attached to the mold, and the cover surface of the belt body is exposed to the The remaining space;

Under the action of pressure, the raw material of the belt body is injected into the remaining space, so that the raw material of the belt body is vulcanized and wrapped on the covering surface of the belt body of the second belt body.
The method for preparing a multicolor rubber belt body according to claim 1, wherein:

Before the step of placing the second belt body in the cavity of the mold, the method further includes: selecting a mold that matches the structure of the second belt body so that the second belt body When placed in the cavity of the mold, part of the belt body covering surface and the bottom wall of the cavity can form a narrow slit communicating with the remaining space.
The method for preparing a multicolor rubber belt body according to claim 2, wherein:

The distance between the covering surface of the belt body forming the slit and the bottom wall of the cavity is 0.05 mm to 3 mm.
The method for preparing a multicolor rubber belt according to claim 2 or 3, characterized in that:

The distance from the inlet of the narrow slot communicating with the remaining space to the bottom end of the narrow slot is 0.5 mm to 3 mm.
The method for preparing a multicolor rubber belt according to any one of claims 2-4, wherein:

The bottom wall of the cavity includes a first area and a second area sunk relative to the first area;

When the second belt body is placed in the cavity of the mold, part of the exposed surface is attached to the first area, and part of the belt body covering surface corresponds to the second area. There is an interval between them to form the slit.
The method for preparing a multicolor rubber belt according to any one of claims 2-5, wherein:

The second belt body has a first surface and a second surface opposite to each other, and the exposed surface on the second surface faces from the first surface to the covering surface of the belt body on the second surface. The direction of the second surface is convex;

When the second belt body is placed in the cavity of the mold, the narrow slit is formed between the covering surface of the belt body on the second surface and the inner wall of the cavity; The exposed surface on the two surfaces is attached to the inner surface of the cavity.
The method for preparing a multicolor rubber belt body according to claim 1, wherein:

Before the step of placing the second belt body in the cavity of the mold, the method further includes: selecting the first belt whose exposed surface has annular protrusions extending along the circumference of the second belt body. Two belt bodies and a mold having a groove capable of engaging with the protrusion;

When the second belt body is placed in the cavity of the mold, the protrusion is locked into the groove.
The method for preparing a multicolor rubber belt according to any one of claims 1-7, characterized in that:

The step of injecting the raw material with the main body into the remaining space includes:

The raw material of the belt body is injected into the remaining space along a direction perpendicular to the side wall of the second belt body and vulcanized to form.
The method for preparing a multicolor rubber belt according to any one of claims 1-8, wherein:

The side wall of the second belt body has a slope;

Optionally, the height of the slope is 1/2 to 2/3 of the overall height of the side wall.
The method for preparing a multicolor rubber belt according to any one of claims 1-9, characterized in that:

The second belt body is provided with a pre-compression amount of 0.05 mm to 0.3 mm high.
The method for preparing a multicolor rubber belt according to any one of claims 1-10, wherein:

The hardness of the second belt body and the belt body after vulcanization are both in the range of 60-80 Shore hardness.
The method for preparing a multicolor rubber belt according to any one of claims 1-11, wherein:

The pressure for injecting the raw material of the belt body into the remaining space and vulcanizing molding is 30 tons to 100 tons; and the vulcanization time is 4-8 minutes.
A method for preparing a multicolor rubber belt, which is characterized in that it is suitable for preparing a multicolor rubber including a first belt made of rubber of a first color and a second belt made of rubber of a second color by using a mold. Belt body; the surface of the second belt body has a connected exposed surface and a covering surface of the belt body;

The preparation method includes:

Inject the belt body raw material into the remaining space jointly defined by the belt body covering surface and the inner surface of the cavity of the mold, so that the belt body raw material is vulcanized and formed and only wrapped outside the belt body covering surface .
A multicolor rubber belt body, which is characterized in that it comprises:

The second belt body has an exposed surface and a belt body covering surface; and

The belt body is arranged around the second belt body and covers the covering surface of the belt body;

The second belt body has a first surface and an opposite second surface;

The exposed surface is located on the first surface and the second surface; the belt body covering surface includes a side wall of the second belt body, a part of the first surface and a part of the second surface.
The multicolor rubber belt body according to claim 14, wherein:

The exposed surface on the second surface is flush with the covering surface of the belt body around it, and the covering thickness of the belt body on the part of the second surface is 0.05 mm to 3 mm.
The multi-color rubber belt according to claim 14 or 15, characterized in that:

The first surface has a first protruding portion, and an end surface of the first protruding portion facing away from the second surface is the exposed surface on the first surface.
The multicolor rubber belt according to any one of claims 14-16, wherein:

The second surface has a second protruding portion, the end surface of the second protruding portion facing away from the first surface is the exposed surface on the second surface, and the belt body is on the part of the The coverage thickness of the second surface is 0.05 mm to 3 mm.
The multicolor rubber belt according to any one of claims 14-17, wherein:

The distance covered by the belt body on the second surface from the edge of the side wall of the second belt body inward is 0.5 mm to 3 mm.
The multicolor rubber belt according to any one of claims 15-18, wherein:

The side wall of the second belt body has a slope surface, and the slope surface is connected to the first surface.
The multicolor rubber belt body according to claim 19, wherein:

The side of the slope surface away from the first surface is spaced from the second surface.
The multicolor rubber belt according to claim 19 or 20, wherein:

The height of the slope is 1/2 to 2/3 of the overall height of the side wall of the second belt body.
The multicolor rubber belt according to any one of claims 14-21, wherein:

The hardness of the second belt body and the belt body are both in the range of 60-80 Shore hardness.
The multicolor rubber belt according to any one of claims 14-22, wherein:

The exposed surface is provided with a plurality of through holes.
The multicolor rubber belt according to claim 14 or 15, characterized in that:

The first surface has a first protruding portion, the first protruding portion is provided with a through hole, and the through hole penetrates the first protruding portion and the second belt at the same time, and the through hole The port away from the second belt body is located on the end surface of the first protruding part away from the first surface.
A wearable device, characterized in that, the wearable device comprises the multi-color rubber belt body according to any one of claims 14-24; and

The device body, the rubber band body is connected to the device body.
The wearable device according to claim 25, wherein the device body comprises a watch body or a sports bracelet body, and the multi-color rubber band body is connected to the watch body or the sports bracelet body.