CN112007829B

CN112007829B - Fishtail-shaped feeding structure and foaming layer coating device

Info

Publication number: CN112007829B
Application number: CN201910469903.7A
Authority: CN
Inventors: 潘煜标; 董振礼
Original assignee: Autofoam Systems Ltd
Current assignee: Autofoam Systems Ltd
Priority date: 2019-05-31
Filing date: 2019-05-31
Publication date: 2022-02-22
Anticipated expiration: 2039-05-31
Also published as: CN112007829A

Abstract

The invention provides a fishtail-shaped feeding structure and a foaming layer coating device using the same. The fish-tail-shaped feeding structure is suitable for guiding the foaming material generated by the foaming device into a liquid storage tank of the foaming layer coating device. The fishtail-shaped feeding structure comprises a body, wherein the body is provided with a flow channel, a first opening and a second opening, the first opening and the second opening are respectively positioned at two ends of the flow channel, the first opening is used for receiving foaming materials generated by a foaming device, the second opening is used for connecting a liquid storage tank of the foaming layer coating device, and the width of the section of the flow channel gradually expands from the first opening to the second opening.

Description

Fishtail-shaped feeding structure and foaming layer coating device

Technical Field

The invention relates to a fishtail-shaped feeding structure and a foaming layer coating device.

Background

The specifications and drawings of the conventional foaming layer coating device, such as the british GB2466067A patent applied by the applicant on 12.12.2008 and the chinese CN201406570Y utility model applied on 26.3.2009, are fully incorporated in the present application.

Please refer to fig. 1, which is a schematic processing diagram of a conventional foam layer coating apparatus disclosed in patent nos. GB2466067A and CN 201406570Y. The foaming layer coating device is used for coating a foaming material (such as a foaming PU material) on the surface of the cloth 1 so as to make the cloth 1 achieve waterproof or hydrophobic effects, wherein the foaming material is generated by the foaming device shown in fig. 2 of GB2466067A and CN201406570Y patents. The foaming device, after generating the foaming material, delivers the foaming material to the manifold 12 via the foam delivery pipe 11 and then injects it into the tank 10 via the extrusion die 7, directly contacting the upper surface of the cloth 1 passing under the tank 10. When the cloth 1 is pulled under the applicator 5, the foaming material is absorbed into the upper surface of the cloth 1.

Fig. 2 and fig. 3 are a schematic diagram of a defect of a cloth processed by a conventional foam layer coating apparatus and a schematic diagram of a conventional foam layer coating apparatus in a three-dimensional manner. The surface of the cloth material 1 coated by the conventional foam layer coating apparatus disclosed in GB2466067A and CN201406570Y is apt to form two macroscopic defects D1 similar to a threadlike shape extending substantially along the conveying direction of the cloth material 1 when conveyed on the foam layer coating apparatus (200). The two defects D1 on the surface of the cloth were studied because the foam was injected into the tank 10 through three manifolds 12A to 12C as shown in fig. 3. As a result, when three streams of foamable material from the three manifolds 12A to 12C meet in the reservoir 10, the two sides of foamable material from the manifold 12B contact the two streams of foamable material from the

manifolds

12A and 12C, respectively, to form two contact interfaces. As the three strands of foam are continuously injected into the tank 10, the three strands of foam may relatively translate or rotate at the two interfaces, causing the foam at the two interfaces to break. When the whole of the foamed material is further applied to the surface of the cloth 1, two defects D1 are formed.

Disclosure of Invention

In view of the above, one embodiment of the present invention provides a fish-tail feeding structure for guiding a foaming material generated by a foaming device into a liquid storage tank of a foaming layer coating device, wherein: the fishtail-shaped feeding structure comprises a body, wherein the body is provided with a flow channel, a first opening and a second opening, the first opening and the second opening are respectively positioned at two ends of the flow channel, the first opening is used for receiving foaming materials generated by the foaming device, the second opening is used for connecting a liquid storage tank of the foaming layer coating device, and the width of the cross section of the flow channel is expanded from the first opening to the second opening.

In one embodiment, the height of the cross section at any one of the flow channels of the above-described fishtail feed structure increases from the center of the cross section to both sides of the cross section.

In one embodiment, the cross-sectional area of the cross-section at any one of the flow channels of the fishtail feed structure is the same.

In one embodiment, among cross-sectional areas of any two positions of the flow passage of the fishtail feed structure, a height of a center of a cross-section closer to the second opening is smaller than a height of a center of a cross-section closer to the first opening.

In one embodiment, the body of the fish-tail feeding structure further includes a fixing member disposed at a periphery of the second opening for fixedly connecting the body to the liquid storage tank of the foaming layer coating device.

In addition, one embodiment of the present invention provides a foam layer coating apparatus, adapted to coat a foam layer on a surface of a cloth, the foam layer coating apparatus including a liquid storage tank for storing a foam material generated by the foam layer coating apparatus, wherein: the foaming layer coating device further comprises a fishtail-shaped feeding structure used for guiding the foaming material generated by the foaming device into the liquid storage tank, the fishtail-shaped feeding structure comprises a body, the body is provided with a flow channel, a first opening and a second opening, the first opening and the second opening are respectively positioned at two ends of the flow channel, the first opening is used for receiving the foaming material generated by the foaming device, the second opening is connected with the liquid storage tank, so that the foaming material generated by the foaming device is injected into the liquid storage tank through the second opening, and the width of the cross section of the flow channel is expanded from the first opening to the second opening.

Drawings

FIG. 1 is a schematic view of a conventional foam layer coating apparatus disclosed in patent Nos. GB2466067A and CN 201406570Y;

FIG. 2 is a schematic diagram showing a defect of a cloth processed by a conventional foaming layer coating apparatus;

FIG. 3 is a perspective view of a conventional foam layer coating apparatus;

FIG. 4 is a schematic perspective view of a foam layer coating apparatus according to the present invention;

FIG. 5 is a schematic perspective view of a fishtail feed structure of the invention;

FIG. 6 is a front view of the fishtail feed structure of the invention;

FIG. 7 is a rear view of the fishtail feed structure of the invention;

FIG. 8 is a cross-sectional view of the flow channel taken along section line AA of FIG. 5;

fig. 9 is a schematic cross-sectional view of the flow channel along section line BB of fig. 5.

Wherein the reference numerals

100 traditional foaming layer coating device

1 cloth

5 coater

7 extrusion die

10 liquid storage tank

11 foam delivery pipe

12/12A-12C manifold

200 foaming layer coating device

29 fishtail-shaped feeding structure

291 noumenon

292 flow passage

292A first opening

292B second opening

293 fixing piece

D1 defect

Height of center of HC1 section

Height of center of HC2 section

Height of two sides of HS1 section

Height of two sides of HS2 section

Width of W1 section

Width of the W2 cross-section.

Detailed Description

It has been found that injecting the foamable material into the reservoir 10 through each of the plurality of manifolds 12A-12C will cause the foamable material from the different manifolds to form a contact interface when in contact with each other, and the foam at the contact interface will break up as a result of shearing movement of the foam relative to each other, resulting in visible defects on the surface of the coated fabric.

In order to solve the above problems, the present invention provides a fish tail-shaped feeding structure, and the fish tail-shaped feeding structure is applied to a foaming layer coating device. As shown in fig. 4, the foam layer coating apparatus 200 shown in the figure eliminates the conventional manifolds 12A-12C and uses a fish tail feed structure 29 to connect the foam delivery pipe 11 and the tank 10, respectively, thereby solving the problem of contact interface between the multiple foam materials meeting in the tank 10.

Referring to fig. 5 to 7, a schematic perspective view, a front view and a rear view of the fishtail feeding structure 29 of the present invention are shown. The fishtail feed structure 29 includes a body 291, the body 291 has a flow passage 292, and a first opening 292A and a second opening 292B respectively located at two ends of the flow passage 292. The first opening 292A is used to connect the foam delivery conduit 11 to receive the foaming material generated from the foaming device. The second opening 292B is used to connect to the liquid tank 10 of the foaming layer coating device 200, so that the foaming material generated by the foaming device is injected into the liquid tank 10 through the second opening 292B. It is particularly emphasized that the cross-sectional width of the flow passage 292 extends from the first opening 292A toward the second opening 292B.

Referring to fig. 8 and 9, cross-sectional views of the flow channel 292 along the AA section line and the BB section line of fig. 5 are respectively shown, wherein the cross-section defined by the AA section line is closer to the second opening 292B, and the cross-section defined by the BB section line is closer to the first opening 292A, so that the width W1 of the cross-section defined by the AA section line is greater than the width W2 of the cross-section defined by the BB section line. It should be noted that, in order to facilitate the description of the sectional shape of the flow passage 292 by the drawings, the sectional shape of the flow passage 292 in fig. 8 and 9 is different from the actual one. In real circumstances, the cross-sectional shape of the flow channel 292 is more narrow and flat, and if it is drawn on a real scale, the lines in the figure will overlap and the cross-sectional shape of the flow channel cannot be shown.

As shown in fig. 8 and 9, in one embodiment, the height of the cross section of the flow passage 292 gradually increases from the center of the cross section to both sides of the cross section, i.e., the heights HC1 and HC2 at the center of the cross section are smaller than the heights HS1 and HS2 at both sides of the cross section, respectively. This is because the flow velocity of the fluid in the center of the flow passage 292 is relatively high, and the foam can be more uniformly dispersed in the flow passage 292 along the sectional shape of the flow passage 292 by widening both sides of the sectional surface of the flow passage 292. Therefore, the foaming material fed into the fishtail feed structure 29 at the same time can be injected into the tank 10 at the same time point, and the problem that the old foaming material accumulates on both sides of the tank 10, resulting in uneven foam layer applied to the cloth 1, can be avoided. Especially when the foam layer has color, the non-uniformity of the foam layer can cause the color at the center of the foam layer to be different from the color at the edge of the foam layer, thereby causing the defect of color difference in edges.

In one embodiment, the height HC1 at the center of the cross-section defined by section line AA in FIG. 8 is less than the height HC2 of the cross-section defined by section line BB in FIG. 9. That is, of the cross-sectional areas of the flow passage 292 at any two locations of the fishtail feed structure 29, the height of the center of the cross-section closer to the second opening 292B is less than the height of the center of the cross-section closer to the first opening 292A. In addition, in one embodiment, the height HS1 on both sides of the cross-section defined by the AA section line shown in FIG. 8 is less than the height HS2 on both sides of the cross-section defined by the BB section line shown in FIG. 9. That is, in the cross-sectional area of the flow passage 292 at any two locations of the fishtail feed structure 29, the height of the two sides of the cross-section closer to the second opening 292B is smaller than the height of the two sides of the cross-section closer to the first opening 292A.

In one embodiment, the cross-sectional area of the cross-section at any of the flow channels 292 of the fishtail feed structure 29 is the same. Therefore, the foaming material can be continuously conveyed in the flow passage 292 at a stable rate, so that the quality of the foaming layer coated on the cloth 1 is more uniform.

In one embodiment, the body 291 of the fish-tail feeding structure 29 further includes a fixing member 293 disposed at the periphery of the second opening 292B for fixing the body 291 on the outer wall of the liquid tank 10 of the foam layer coating apparatus 200.

Although the present invention has been described with reference to the above embodiments, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention, and it is intended to cover all such changes and modifications as fall within the scope of the appended claims.

Claims

1. A fish tail-shaped feeding structure adapted to guide a foaming material produced by a foaming device into a liquid sump of a foaming layer coating device, characterized in that: the fishtail-shaped feeding structure comprises a body, wherein the body is provided with a flow channel and a first opening and a second opening which are respectively positioned at two ends of the flow channel, the first opening is used for receiving foaming materials generated by the foaming device, the second opening is used for connecting a liquid storage tank of the foaming layer coating device, the width of the section of the flow channel is expanded from the first opening to the second opening, the first opening is positioned between two ends of the second opening in the width direction of the second opening, the height of a section at any position of the flow channel is increased from the center of the section to two sides of the section, and in the section areas of any two positions of the flow channel, the height of the center of the section closer to the second opening is smaller than the height of the center of the section closer to the first opening.

2. The fishtail feed structure of claim 1, wherein: the cross-sectional area of the cross-section at any position of the flow passage is the same.

3. The fish tail feed structure of any one of claims 1 to 2, wherein: the body further comprises a fixing piece arranged on the periphery of the second opening and used for fixedly connecting the body with the liquid storage tank of the foaming layer coating device.

4. A foaming layer coating device is suitable for coating a foaming layer on the surface of a cloth, and comprises a liquid storage tank for storing a foaming material generated by a foaming device, and is characterized in that: the foaming layer coating device further comprises a fishtail-shaped feeding structure for guiding the foaming material generated by the foaming device into the liquid storage tank, the fishtail-shaped feeding structure comprises a body, the body is provided with a flow channel and a first opening and a second opening which are respectively positioned at two ends of the flow channel, the first opening is used for receiving the foaming material generated by the foaming device, the second opening is connected with the liquid storage tank, so that the foaming material generated by the foaming device is injected into the liquid storage tank through the second opening, the width of the cross section of the flow channel is expanded from the first opening to the second opening, in the width direction of the second opening, the first opening is positioned between two ends of the second opening, the height of a cross section at any position of the flow channel is increased from the center of the cross section to two sides of the cross section, and the cross section at any two positions of the flow channel is in the cross section, the height of the center of the cross section closer to the second opening is smaller than the height of the center of the cross section closer to the first opening.

5. The foam layer coating apparatus according to claim 4, wherein: the cross-sectional area of the cross-section at any position of the flow passage is the same.

6. A device for applying a foamed layer according to any one of claims 4 to 5, wherein: the body of the fish-tail-shaped feeding structure further comprises a fixing piece which is arranged on the periphery of the second opening and fixedly connected to the liquid storage tank.