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CN-122002732-A - Foam sealing element and use method thereof

CN122002732ACN 122002732 ACN122002732 ACN 122002732ACN-122002732-A

Abstract

The invention relates to a foam sealing element with a material-saving design structure and a use method thereof. The foam sealing piece comprises a strip-shaped foam main body and a sectional tangent line, wherein the sectional tangent line penetrates through the foam main body in the thickness direction and forms a first side face and a second side face on two sides of the tangent line respectively, a first abduction hole and a second abduction hole are formed in two ends of the sectional tangent line respectively, and a first adduction groove and a second adduction groove are formed in the first side face and the second side face respectively. When the foam sealing piece is used, the foam main body is firstly opened from the sectioning tangent line, the first side surface and the second side surface which are positioned at the first abduction position holes and the second abduction position holes are oppositely bent, the first side is bent along the first inward-folding groove, the second side is bent along the second inward-folding groove, and then the foam sealing piece is adhered to the outside of the flange opening to be sealed. Compared with the prior art, the foam sealing piece has high material utilization rate, no splicing part and good sealing performance.

Inventors

  • ZHOU QIAN
  • CHEN HUA
  • MAO XIPING

Assignees

  • 上海昊佰智造精密电子股份有限公司

Dates

Publication Date
20260508
Application Date
20241104

Claims (10)

  1. 1. The foam sealing piece is characterized by comprising a strip-shaped foam main body and a sectional tangent line (1), wherein the sectional tangent line (1) penetrates through the foam main body along the thickness direction and forms a first side surface and a second side surface on two sides of the tangent line respectively; The sectioning tangent line (1) extends along the length direction of the foam main body, and a first abduction hole (2) and a second abduction hole (3) are respectively arranged at two ends, Along the thickness direction, a first adduction groove (4) and a second adduction groove (5) are respectively formed on the first side surface and the second side surface, the distance X between the first abduction hole (2) and the first adduction groove (4), and the distance Y between the second abduction hole (3) and the second adduction groove (5) meet X=Y; When the strip-shaped foam main body is opened from the subsection tangent line (1), a first side face and a second side face which are positioned at the first abduction position hole (2) and the second abduction position hole (3) are bent relatively, the first side face is bent along the first adduction groove (4), the second side face is bent along the second adduction groove (5) to form a corner, and a foam sealing piece (10) is formed, and the foam sealing piece (10) is used for being adhered outside a flange opening which needs sealing.
  2. 2. Foam sealing element according to claim 1, characterized in that the foam sealing element (10) is a square frame-shaped foam sealing element, comprising a first foam sealing edge (6), a second foam sealing edge (7), a fourth foam sealing edge (9) and a third foam sealing edge (8) which are connected in sequence, wherein the first foam sealing edge (6) is opposite to the fourth foam sealing edge (9), and the second foam sealing edge (7) is opposite to the third foam sealing edge (8).
  3. 3. Foam seal according to claim 2, characterized in that the foam seal (10) has an annular width (13) a, a width B and a length C, the foam body has a length d, d = z X C + Y X a = C + B +2*a, wherein B = X = Y, X, Y, z are constants related to the density of the foam body, and a, B, C are the annular width (13), width and length, respectively, of the foam seal before deformation.
  4. 4. The foam seal of claim 1, wherein the foam body has a density of 100-500kg/m 3 .
  5. 5. The foam seal of claim 4, wherein x = 0.98, y = 1.02, and z = 1.02 for a density of 100-300kg/m 3 for the foam body.
  6. 6. The foam seal of claim 4, wherein x = 0.98, y = 1.04, z = 1.04 for a density of the foam body of 300-500kg/m 3 .
  7. 7. The foam seal of claim 1, wherein the foam body is selected from any one of IXPE foam, PU foam, conductive foam, aluminum foil foam, EPE foam, EVA foam, or CR foam.
  8. 8. Foam seal according to claim 1, characterized in that the foam seal (10) is attached by means of an adhesive to the outside of the flange mouth to be sealed.
  9. 9. The foam seal of claim 8, wherein the adhesive is selected from any one of pressure sensitive adhesive, acrylic glue, hot melt glue, polyurethane glue, or neoprene glue.
  10. 10. A method for using a foam sealing element according to any one of claims 1 to 9, comprising the steps of opening a foam main body along a breaking tangent line (1), bending a first side surface and a second side surface at the positions of a first abduction hole (2) and a second abduction hole (3) relatively, bending the first side surface along a first inner collecting groove (4) to form a first foam sealing edge (6) and a second foam sealing edge (7), bending the second side surface along a second inner collecting groove (5) to form a third foam sealing edge (8) and a fourth foam sealing edge (9), connecting the first foam sealing edge (6) with the third foam sealing edge (8), connecting the second foam sealing edge (7) with the fourth foam sealing edge (9) to form the foam sealing element (10), aligning the first foam sealing edge (6) with a flange opening to be sealed, and pasting the first foam sealing edge (6) and the third foam sealing edge (7) and the fourth foam sealing edge (9) on the outer flange opening to be sealed sequentially.

Description

Foam sealing element and use method thereof Technical Field The invention belongs to the technical field of foam, relates to a foam sealing member and a using method thereof, and in particular relates to a foam sealing member with a material-saving design structure and a using method thereof. Background Along with the continuous development of technology, electronic products are gradually thinned and miniaturized, corresponding die-cut products for the electronic products are also becoming smaller and smaller, and the technical requirements of the die-cut industry are also becoming higher and higher. At present, when more and more miniaturized foam products are processed by adopting a traditional one-step punching process, the problems of glue overflow, difficult waste discharge, more product falling sheets and the like appear, and a plurality of troubles are caused for subsequent processing and application, and direct economic loss is caused. In addition, the world has increasingly stringent environmental requirements, cost pressures and daily increases, and requirements for material utilization are increasingly stringent. However, when the sealing foam is manufactured at present, the material utilization rate is low, a large amount of materials are wasted and the cost is wasted, a certain burden is also caused to the environment due to serious material waste, and some methods are used for carrying out die cutting by combining and splicing blanks, however, the problem of reduced sealing performance possibly exists at the splicing position, and in addition, the problem of reduced strength or uneven strength possibly exists at the splicing position, so that the overall performance is influenced. Disclosure of Invention The invention aims to provide a foam sealing piece with a material-saving design structure and a use method thereof, wherein the foam sealing piece comprises a strip-shaped foam main body and a sectional tangent line, when in use, the foam main body is opened along the sectional tangent line, and the foam sealing piece is directly formed through deformation, so that the problems of low material utilization rate, high cost and reduced sealing performance caused by combined and spliced embryo materials are solved. The aim of the invention can be achieved by the following technical scheme: The invention provides a foam sealing piece, which comprises a strip-shaped foam main body and a sectional tangent line, wherein the sectional tangent line penetrates through the foam main body along the thickness direction and forms a first side surface and a second side surface on two sides of the tangent line respectively; The sectioning tangent line extends along the length direction of the foam main body, and a first abduction hole and a second abduction hole are respectively arranged at two ends, Along the thickness direction, a first inward groove and a second inward groove are respectively formed on the first side surface and the second side surface, the distance X between the first abduction hole and the first inward groove, and the distance Y between the second abduction hole and the second inward groove meet X=Y; When the strip-shaped foam body is opened from the section tangent line, the first side surface and the second side surface which are positioned at the first abduction position hole and the second abduction position hole are bent relatively, the first side surface is bent along the first adduction groove, the second side surface is bent along the second adduction groove to form a corner part, and forming a foam sealing element which is used for being adhered to the outside of the flange opening to be sealed. Further, the sizes of the first adduction groove and the second adduction groove are matched with the size of the rounding angle in the unfolded foam sealing piece. Further, the foam sealing piece is a square foam sealing piece and comprises a first foam sealing edge, a second foam sealing edge, a fourth foam sealing edge and a third foam sealing edge which are sequentially connected, wherein the first foam sealing edge is opposite to the fourth foam sealing edge, and the second foam sealing edge is opposite to the third foam sealing edge. Further, the foam sealing element has an annular width A, a width B and a length C, the foam main body has a length d, d=z+c+y+b+x a=c+b+a, b=x=y, X, Y and z are constants related to the density of the foam main body, and a, B and C are the annular width, width and length before the foam sealing element is deformed. Further, the density of the foam body is 100-500kg/m 3. Further, when the density of the foam body is 100-300kg/m 3, x=0.98, y=1.02, and z=1.02. Preferably, when the density of the foam body is 120-240kg/m 3, x=0.98, y=1.02, and z=1.02. Further, when the density of the foam body is 300-500kg/m 3, x=0.98, y=1.04, and z=1.04. Preferably, when the density of the foam body is 320-400kg/m 3, x=0.98, y=1.04, and z=1.04. Further, the foam body is