Heat dispersion device and repair and joining methods

• US 10,336,020 B2
• Filed: 12/12/2014
• Issued: 07/02/2019
• Est. Priority Date: 01/31/2014
• Status: Active Grant

• Current Assignee: Mitsubishi Aircraft Corporation (Mitsubishi Heavy Industries, Ltd.)
• Original Assignee: Mitsubishi Aircraft Corporation (Mitsubishi Heavy Industries, Ltd.)
• Inventors: Shigetomi, Toshikazu, Suhara, Masayoshi, Ishida, Morimasa, Muto, Shuhei
• Primary Examiner(s): Tucker, Philip C
• Assistant Examiner(s): Slawski, Brian R
• Application Number:
  US14/568,279
• Publication Number:
  US 20150217523A1
• Time in Patent Office: 1,663 Days
• Field of Search: 156 60, 156 64, 156 94, 156 98, 156145, 156146, 156285, 156286, 156293, 156297, 156298, 1563031, 1563071, 1563073, 156349, 156378, 156499, 156580, 1565831, 1565833, 219200, 219221, 219227, 219228, 219243, 219520, 219528, 219529, 219530, 219535, 219538, 219540, 392339, 392441, 392443, 165168, 165169, 16510411, 16510419, 16510428, 16510431, 165 46
• CPC Class Codes: B29C 2035/043 oil
• CPC Class Codes: B29C 35/041 using liquids
• CPC Class Codes: B29C 65/18 using heated tools
• CPC Class Codes: B29C 65/4835 Heat curing adhesives
• CPC Class Codes: B29C 66/81455 being a fluid inflatable bag or bladder, a diaphragm or a vacuum bag for applying isostatic pressure inflatable element positioned between the joining tool and a backing-up part B29C66/82421
• CPC Class Codes: B29C 66/8183 characterised by the thermal conducting constructional aspects
• CPC Class Codes: B29C 66/87 Auxiliary operations or devices
• CPC Class Codes: B29C 66/91431 the temperature being kept constant over time
• CPC Class Codes: B29C 66/91631 the heat or the thermal flux being kept constant over time
• CPC Class Codes: B29C 73/02 using liquid or paste-like material B29C73/16 takes precedence
• CPC Class Codes: B29C 73/10 using patches sealing on the surface of the article B29C73/14 takes precedence
• CPC Class Codes: B29C 73/34 for local heating
• CPC Class Codes: B29L 2031/3076 Aircrafts blades, propellers B29L2031/08
• CPC Class Codes: Y10T 156/10 Methods of surface bonding and/or assembly therefor

Abstract

The present invention provides a device which can uniformize heat distribution by using an existing heater mat for repairing or joining members. A heat dispersion device includes a bag with a fluid sealed inside, and is disposed on a second surface of a heater mat which has a first surface to be directed toward an object to be heated and the second surface opposite to the first surface. The fluid inside the bag is preferably heated with a heat source.

Claims

1. A heating apparatus for heating an object that comprises:

a heater mat;

a heat dispersion device comprising a bag with a fluid sealed inside of the bag;

an internal heat source inside the bag which heats the fluid; and

a flow forcing part which forces the fluid to flow,

wherein the heat dispersion device is disposed on a surface of the heater mat.

2. The heating apparatus according to claim 1, wherein the bag includes a circuit in which the fluid circulates.

3. The heating apparatus according to claim 2, wherein the circuit has a spiral shape, and forms a flow which moves toward an inner peripheral side while circling inside the bag, and a flow which moves toward an outer peripheral side while circling inside the bag.

4. The heating apparatus according to claim 2, wherein the bag comprises:

one or more outer walls that define an enclosure in which the fluid resides, and

an inner wall provided within the enclosure,

wherein the inner wall and the one or more outer walls at least partially define the circuit in which the fluid circulates.

5. The heating apparatus according to claim 1, wherein the bag has a plate-like outline, and is placed over substantially the entire surface of the heater mat.

6. The heating apparatus according to claim 1, wherein the object to be heated is an aircraft member constituting an aircraft or a repair material used for repairing the aircraft member.

7. The heating apparatus according to claim 1, wherein the bag includes a circuit in which the fluid circulates and the internal heat source is provided so as to meander along the circuit.

8. The heating apparatus according to claim 1, wherein the heater mat is connected to a control unit configured to energize the heater mat to generate heat.

9. The heating apparatus according to claim 1, wherein the heater mat has an opposite surface that is opposite to the surface of the heater mat, the opposite surface being directed toward an object to be heated.

10. The heating apparatus according to claim 1, further comprising a temperature sensor disposed between the heater mat and the heat dispersion device.

11. The heating apparatus according to claim 10, further comprising a control system connected to the heater mat and heat dispersion device and configured to adjust an output of the heater mat and heat dispersion device based on a temperature measured by the temperature sensor.

12. The heating apparatus according to claim 1, wherein the flow forcing part includes an inlet passage and an outlet passage, and suctions the fluid from the inside of the bag through the outlet passage and pushes the suctioned fluid through the inlet passage to the inside of the bag so that the fluid is forced to flow.

16. A repair method using the heating apparatus according to claim 1, comprising the steps of:

disposing a repair material containing a resin, which is cured by heating, on a member which is an object to be repaired;

disposing the heat dispersion device on the surface of the heater mat;

insert directing another surface of the heater mat toward the repair material and covering the repair material with the heater mat; and

heating the repair material with the heater mat.

17. The repair method according to claim 16, wherein, in the step of heating the repair material:

the fluid is heated with the internal heat source, and

the fluid is forced to flow.

18. The repair method according to claim 16, wherein the repair material includes a prepreg formed from a thermosetting resin and a fiber base material.

19. The repair method according to claim 16, wherein the member is an aircraft member constituting an aircraft.

20. A joining method using the heating apparatus according to claim 1, comprising the steps of:

disposing an adhesive containing a resin, which is cured by heating, between a first member and a second member to be joined together;

disposing the heater mat on at least one of the first member and the second member;

disposing the heat dispersion device on the surface of the heater mat; and

heating the adhesive with the heater mat.

13. A heating apparatus for heating an object that comprises:

a heater mat;

a heat dispersion device comprising a bag with a fluid sealed inside of the bag; and

an internal heat source inside the bag which heats the fluid,

wherein the heat dispersion device is disposed on a surface of the heater mat, and

wherein the bag extends along a plane and an inside of the bag is divided into a central region located near a center of the plane and a surrounding region located outside of the central region along the plane, further wherein the heat dispersion device is configured such that a temperature of the fluid is controlled based on at least one of a temperature of the central region and a temperature of the surrounding region.

14. A heating apparatus for heating an object that comprises:

a heater mat;

a heat dispersion device comprising a bag with a fluid sealed inside of the bag;

an internal heat source inside the bag which heats the fluid; and

a pump which forces the fluid to flow,

wherein the heat dispersion device is disposed on a surface of the heater mat.

15. The heating apparatus according to claim 14, wherein the pump is connected to one end of the bag and suctions the fluid from an inside of the bag and pushes the suctioned fluid to the inside of the bag so that the fluid is forced to flow.