TASK 70-36-04-360-501 Moulding Process For Silicon Rubber Compound

DMC:V2500-00-70-36-04-00A-621A-D|Issue No:002.00|Issue Date:2020-05-01

Export Control

EAR Export Classification: Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3), except for the following Service Bulletins which are currently published as EAR Export Classification 9E991: SBE70-0992, SBE72-0483, SBE72-0580, SBE72-0588, SBE72-0640, SBE73-0209, SBE80-0024 and SBE80-0025.

Copyright

© IAE International Aero Engines AG (2001, 2014 - 2021) The information contained in this document is the property of © IAE International Aero Engines AG and may not be copied or used for any purpose other than that for which it is supplied without the express written authority of © IAE International Aero Engines AG. (This does not preclude use by engine and aircraft operators for normal instructional, maintenance or overhaul purposes.).

Applicability

All

Common Information

TASK 70-36-04-360-501 Moulding Process For Silicon Rubber Compound

Safety Precautions

General

This TASK gives the procedure to mould and the quality necessary for CoMat 08-036 SILICONE RUBBER COMPOUND.

The silicone rubber compound is used for vibration damping of assemblies and is applied at temperatures of up to 350 deg F (176 deg C).

The compound must only be used when it is specified in the Engine Manual.

NOTE

To identify the consumable materials refer to the PCI.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NONE

Consumables, Materials and Expendables

NameManufacturerPart Number / IdentificationQuantityRemark
CoMat 01-076 METHYL ETHYL KETONELOCALCoMat 01-076
CoMat 08-032 PRIMERLOCALCoMat 08-032
CoMat 08-036 SILICONE RUBBER COMPOUNDLOCALCoMat 08-036

Spares

NONE

Safety Requirements

WARNING

IT IS THE RESPONSIBILITY OF THE OPERATOR TO OBTAIN AND OBSERVE THE MANUFACTURERS MATERIAL SAFETY DATA SHEETS FOR CONSUMABLE MATERIALS INFORMATION SUCH AS, HAZARDOUS INGREDIENTS, PHYSICAL/CHEMICAL CHARACTERISTICS, FIRE EXPLOSION, REACTIVITY, HEALTH HAZARD DATA, PRECAUTIONS FOR SAFE HANDLING, USE AND CONTROL MEASURES AND ALSO TO TAKE LOCAL REGULATIONS INTO CONSIDERATION.

Procedure

    1. SUBTASK 70-36-04-360-001 Prepare the Parts

    1. NOTE

      The dry blasting must only be done when it is specified in the Engine Manual.

      Dry abrasive blast in accordance with the Engine Manual when necessary.

    2. Clean the moulding surfaces with a clean cloth made moist with CoMat 01-076 METHYL ETHYL KETONE.

    3. Dry the moulding surfaces by air for a minimum of 15 minutes.

    4. NOTE

      Primer thickness: Pale pink color.

      Within eight hours after cleaning, apply a thin layer of CoMat 08-032 PRIMER to the moulding surfaces with a clean cloth.

    5. Dry at room temperature for a minimum of 2 hours and a maximum of 24 hours at moisture level equivalent to 20 - 90 percent relative humidity at 77 deg F (25 deg C).

    2. SUBTASK 70-36-04-360-002 Make-up of CoMat 08-036 Silicone Rubber Compound

    1. Mix 9.5 to 10.5 parts by weight of the base material with 0.8 to 1.2 parts by weight of the curing agent in 8 to 10 minutes at 70 to 80 deg F (21 to 27 deg C) until the material is a constant colour.

    2. Remove all the air in a vacuum of 1 to 5 mm of mercury for 5 to 10 minutes.

    3. SUBTASK 70-36-04-360-003 Apply and Cure the Silicone Rubber Compounds

    1. Apply CoMat 08-036 SILICONE RUBBER COMPOUND into the mould areas using air pressure type dispenser or equivalent.

    2. NOTE

      More detailed instructions are given in the Engine Manual.

      Cure the compound at room temperature for 16 hours followed by it being kept at 290 to 310 deg F (143 to 154 deg C) for one hour with the moulding fixture installed.

    4. SUBTASK 70-36-04-220-001 Examine the Moulded Areas

    1. Examine the moulded areas to make sure they are free from defects such as voids, recesses, cracks, bubbles, foreign inclusions, peeling and discoloration. More inspection checks and the dimension checks must be done when specified in the Engine Manual.

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Revised step. (19VC637)

Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:LOCAL
Supply Number:CoMat 01-076
Type:sp01
Supply Short Name:CoMat 01-076 METHYL ETHYL KETONE
Supply Name:CoMat 01-076 METHYL ETHYL KETONE
Specification Groups:
Doc NumberType
METHYL ETHYL KETONE, TECHNICAL GRADE, CERTIFIED TO BSI BS 1940 OR ASTM D740, OR TT-M-261
Suppliers:
ManufacturerRemarks
LOCAL
Manufacturer Code:X222X
Supply Number:CoMat 08-032
Type:sp01
Supply Short Name:CoMat 08-032 PRIMER
Supply Name:CoMat 08-032 PRIMER
Specification Groups:
Doc NumberType
DELETED. USE ONE OF THE COMAT 08-032 LETTER SUFFIX ALTERNATIVE MATERIALS.
Suppliers:
ManufacturerRemarks
X222X
Manufacturer Code:71984
Supply Number:CoMat 08-036
Type:sp01
Supply Short Name:CoMat 08-036 SILICONE RUBBER COMPOUND
Supply Name:CoMat 08-036 SILICONE RUBBER COMPOUND
Specification Groups:
Doc NumberType
SILASTIC RUBBER J RTV
Suppliers:
ManufacturerRemarks
71984
K6835
KG699
B1571
V277V