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DE-102020207413-B4 - Resin structure

DE102020207413B4DE 102020207413 B4DE102020207413 B4DE 102020207413B4DE-102020207413-B4

Abstract

Resin structure (1), comprising: a resin element (10) having a through-hole that penetrates in an orthogonal direction perpendicular to a horizontal direction; and a collar (20) that is fitted into the through-hole, wherein the resin element (10) is formed by laminating several base materials in the orthogonal direction which are made of a resin containing reinforcing fibers, characterized in that the resin element (10) exhibits: an outer resin section (11) in which the reinforcing fibers are aligned in the horizontal direction; and an inner resin section (12) which is arranged in the horizontal direction between the outer resin section (11) and the collar; wherein a mean value of a fiber orientation angle of the inner resin section (12) with respect to a side surface (22) of the collar (20) is smaller than a mean value of a fiber orientation angle of the outer resin section (11) with respect to the side surface (22) of the collar (20), the resin element (10) by pressing the several base materials and causing the multiple base materials to flow to reach the side surface (22) of the collar (20) is producible, the inner resin section (12) has a boundary between the multiple base materials on a surface in the orthogonal direction of the inner resin section (12), the collar (20) has a flange section (24) which extends from an end section in an orthogonal direction in the horizontal direction, and the flange section (24) covers the boundary between the multiple base materials in an orthogonal direction.

Inventors

  • Takahisa Egawa
  • Masatomo Teshima
  • Masahiro Kitagawa

Assignees

  • SUZUKI MOTOR CORPORATION
  • TEIJIN LIMITED

Dates

Publication Date
20260513
Application Date
20200616
Priority Date
20190618

Claims (7)

  1. Resin structure (1) comprising: a resin element (10) having a through-hole penetrating in an orthogonal direction perpendicular to a horizontal direction; and a collar (20) fitted into the through-hole, wherein the resin element (10) is formed by laminating several base materials in the orthogonal direction, which are made of a resin containing reinforcing fibers, characterized in that the resin element (10) has: an outer resin section (11) in which the reinforcing fibers are aligned in the horizontal direction; and an inner resin section (12) arranged in the horizontal direction between the outer resin section (11) and the collar; wherein a mean value of a fiber orientation angle of the inner resin section (12) with respect to a side surface (22) of the collar (20) is smaller than a mean value of a fiber orientation angle of the outer resin section (11) with respect to the side surface (22) of the collar (20), the resin element (10) can be produced by pressing the multiple base materials and causing the multiple base materials to flow to reach the side surface (22) of the collar (20), the inner resin section (12) has a boundary between the multiple base materials on a surface in the orthogonal direction of the inner resin section (12), the collar (20) has a flange section (24) extending from an end section in the orthogonal direction in the horizontal direction, and the flange section (24) covers the boundary between the multiple base materials in the orthogonal direction.
  2. Resin structure (1) according to Claim 1 , characterized in that the mean value of the fiber orientation angle of the inner resin section (12) with respect to the side surface (22) of the collar (20) is 0° to 30°.
  3. Resin structure (1) according to Claim 1 or 2 , characterized in that the mean value of the fiber orientation angle of the inner resin section (12) with respect to the side surface (22) of the collar (20) decreases continuously in the inward direction in the inner resin section (12).
  4. Resin structure (1) according to one of the Claims 1 until 3 , characterized in that the collar (20) has the flange section (24) which extends from the end section in an orthogonal direction in the horizontal direction, and the flange section (24) covers the inner resin section (12) in an orthogonal direction.
  5. Resin structure (1) according to one of the Claims 1 until 4 , characterized in that the side surface (22) of the collar (20) is in contact with the inner resin section (12) and is inclined with respect to the orthogonal direction; the inner resin section (12) has: an upper layer forming one surface in the orthogonal direction; and a lower layer forming the other surface in the orthogonal direction; wherein the upper layer is in contact with the side surface (22) over a larger area than the lower layer; and the thickness of the collar (20) increases in the horizontal direction from a central axis of the collar (20) to the side surface (22) from the upper layer to the lower layer.
  6. Resin structure (1) according to one of the Claims 1 until 4 , characterized in that the side surface (22) of the collar (20) is in contact with the inner resin section (12) and is inclined with respect to the orthogonal direction; the inner resin section (12) comprises: an upper layer forming one surface in the orthogonal direction; and a lower layer forming the other surface in the orthogonal direction; wherein the upper layer is in contact with the side surface (22) of the collar (20) over a larger area than the lower layer; and the thickness of the collar (20) decreases in the horizontal direction from a central axis of the collar (20) to the side surface (22) from the upper layer to the lower layer.
  7. Resin structure (1) according to one of the Claims 1 until 4 , characterized in that the side surface (22) of the collar (20) is in contact with the inner resin section (12) and is parallel to the orthogonal direction.

Description

Technical field The present invention relates to a resin structure according to the preamble of claim 1. State of the art In the JP 2015- 86 942 A A resin structure is disclosed, comprising a resin element having a through-hole penetrating in an orthogonal direction and a collar fitted into the through-hole. The resin structure is attached to a metallic fastener by means of a bolt (screw) and a nut inserted into the collar. The resin element is made of a composite material in which reinforcing fibers, such as carbon fibers or glass fibers, are cured with the resin. The reinforcing fibers are aligned in a horizontal direction along the length of the resin element, thereby improving its strength. The DE 10 2016 222 467 A1 Disclosing a method for producing a fiber structure, at least one fiber layer is aligned in a predetermined position, and a positioning device is inserted into the fiber layer at a predetermined location within the fiber structure. The positioning device penetrates the fiber structure in an insertion direction, displacing the fibers within the structure substantially in a plane perpendicular to the insertion direction of the positioning device. The DE 11 2017 001 652 T5 Disclosing a method for inserting an insert into a composite panel, wherein the composite panel comprises a thermoplastic polymer material and reinforcing fibers embedded in the thermoplastic polymer material. The fibers are pushed apart in a radial direction. This creates fiber bundles around the insert without the fibers breaking. The DE 10 2017 111 146 A1 Disclosing a method for manufacturing a molded part with a fiber-reinforced carrier and a connecting bushing attached to it, the bushing having at least one mounting opening, involves inserting a fiber-reinforced mat between the respective embossing surfaces of two tool components, which are in an open position. The mat can consist of natural fibers or synthetic fibers, such as glass fibers or plastic fibers. The connecting bushing is positioned on a positioning dome located on at least one tool component. After the fiber-reinforced mat is inserted and the connecting bushing is positioned, the tool components are closed, so that the mat is compressed and pressed to produce the fiber-reinforced carrier. The positioning dome creates an opening in the mat by punching out a waste piece from the mat. Summary of the invention Technical problem When the resin structure is secured with a fastener (or attached element), the stress (or strain) concentrates around the collar, and a force acts in one direction, pressing the resin element against a side surface of the collar. If the resin element cannot withstand the force acting on the side surface of the collar, a force acts on one surface (e.g., the top surface) of the resin element in one direction (e.g., upwards) along the side surface of the collar, and a force acts on the other surface (e.g., the bottom surface) of the resin element in the opposite direction (e.g., downwards) along the side surface of the collar. If the resin element is formed by laminating several base materials in an orthogonal direction, which are made from a resin containing reinforcing fibers, the strength between the base materials is weak compared to the strength in the base material in which the reinforcing fibers are aligned, which is why there is a risk of delamination, in which the base materials in the resin element are separated from each other around the collar. One object of the present invention is therefore to prevent the occurrence of delamination in a resin structure formed by laminating several base materials in an orthogonal direction, which are made from a resin containing reinforcing fibers. Means to solve the problem A resin structure according to one aspect comprises: a resin element having a through-hole penetrating in an orthogonal direction perpendicular to a horizontal direction; and a collar fitted into the through-hole, the resin element being formed by laminating several base materials in the orthogonal direction The collar is formed from a resin containing reinforcing fibers. The resin structure is characterized in that the resin element comprises: an outer resin section in which the reinforcing fibers are aligned in the horizontal direction; and an inner resin section arranged in the horizontal direction between the outer resin section and the collar; wherein the mean value of a fiber alignment angle of the inner resin section with respect to a side surface of the collar is smaller than the mean value of a fiber alignment angle of the outer resin section with respect to the side surface of the collar; wherein the resin element can be produced by pressing the multiple base materials and causing the multiple base materials to flow to reach the side surface of the collar; wherein the inner resin section has a boundary between the multiple base materials on a surface in the orthogonal direction of the inner resin section; the colla