Molding device and molding method

Patent metadata

Field	Value
Publication number	US-12134223-B2
Application number	US-201917634861-A
Country	US
Kind code	B2
Filing date	Nov 11, 2019
Priority date	Nov 11, 2019
Publication date	Nov 5, 2024
Grant date	Nov 5, 2024

Abstract

A molding device is includes a mandrel that has an arc-shaped cross section; a roller that has a round-shaped cross section, is movable along a surface of the mandrel, and applies a pressing force to a material to be molded placed on the mandrel; a gripping unit that grips the material to be molded on an outside of the roller with respect to the mandrel and applies a tensile force to the material to be molded; a roller driving unit that moves the roller along the surface of the mandrel; a gripping-unit driving unit that moves the gripping unit. A control unit synchronizes a position of the roller and a position of the gripping unit with each other to control the roller driving unit and the gripping-unit driving unit so that the material to be molded is arranged in a direction perpendicular to a vertical direction of the mandrel.

First claim

The invention claimed is:

1. A forming method using a forming device that includes a mandrel having an arc-shaped cross section, a roller that has a circular cross section, is movable along a surface of the mandrel, and applies a pressing force to a material to be formed being a composite material placed on the mandrel, a gripping unit that grips the material to be formed on an outer side than the roller with respect to the mandrel and applies a tensile force to the material to be formed, a roller drive unit that moves the roller along the surface of the mandrel, and a gripping unit drive unit that moves the gripping unit, the forming method comprising:
a step of causing the roller to apply a pressing force to the material to be formed placed on the mandrel;
a step of causing the gripping unit to apply a tensile force to the material to be formed;
a step of moving the roller along the surface of the mandrel;
a step of moving the gripping unit;
a step of causing a position of the roller and a position of the gripping unit to be synchronized with each other such that the material to be formed between the roller and the gripping unit is disposed in a direction perpendicular to a vertical direction of the mandrel; and
a step of causing an interlayer slip to occur over the material to be formed, acted on by the forming device, at a certain minute time interval ΔT,
wherein, in the step of causing the interlayer slip, a difference in a peripheral length of the material to be formed shaped along the mandrel in a period from a start of shaping to a certain time T 1 is expressed by Expression (1) below:

π
⁡
(

R
+
t

)

⁢

θ
180

-

π
⁢
R
⁢

θ
180

=

π
⁢
t
⁢

θ
180

(
1
)

a difference in a peripheral length of the material to be formed disposed along the roller at the certain time T 1 is expressed by Expression (2) below:

π
⁡
(

r
+
t

)

⁢

θ
180

-

π
⁢
r
⁢

θ
180

=

π
⁢
t
⁢

θ
180

(
2
)

and
at the certain minute time interval ΔT during the shaping, a difference in a peripheral length of the material to be formed that occurs due to a balance between a difference in a peripheral length of the material to be formed shaped along the mandrel and a difference in a peripheral length of the material to be formed disposed along the roller is expressed by Expression (3) below:

{

π
⁢
R
⁢

Δθ
180

+

π
⁡
(

r
+
t

)

⁢

θ
+
Δθ

180

}

-

{

π
⁡
(

R
+
t

)

⁢

Δθ
180

+

π
⁢
r
⁢

θ
+
Δθ

180

}

=

π
⁢
t
⁢

Assignees

• Mitsubishi Heavy Ind Ltd

Inventors

• Ozaki Ryota
• Kani Yuki

Classifications

• B29C53/82

  Cores or mandrels · CPC title

• B29C53/043

  using rolls or endless belts · CPC title

• Y02T50/40

  Weight reduction · CPC title

• B29C53/80

  Component parts, details or accessories; Auxiliary operations · CPC title

• B29C53/42 Primary

  using internal forming surfaces, e.g. mandrels · CPC title