Full Product Manual

27
Fixture
3M #670 tape cut
after cement is cured
Fill level will
shrink when
cured
Processing Steps
1. Use PS-30 or Weld-On 40 or 42.
2. Cut must be sharp (sawn or routed).
If material is stress free, no annealing necessary.
3. Cement against saw or rout cut surface.
Cellophane tape (try tape to see if
cement cures against adhesives)
Use a hypodermic needle, eye dropper,
or other convenient dispenser.
Parts should fit without forcing or flexing
before cementing. There should be no
visible gaps.
Clamping pressure used to
hold pieces being cemented
together should not exceed
1 psi. Joint should set in 2 to
5 minutes.
Cementing technique for inside joints that cannot be routed
and finished.
3M #670 Tape
(Reinforced
cellophane)
Outside open
V-joint which may be
routed
Cemented area
1. Thin PS-30 or Weld-On 40 or 42 15% with MMA.
2. Mix with component "B"– degas cement and pour in area left by
#670 tape which is to be cemented.
3. Float vertical piece on cement. (If heavy, support weight with a fixture.)
4. Clean off excess cement with a spatula that has a radius on tip to
create a radius of cement.
5. Let cure and cut carefully along tape edge and remove tape.
Thick Section Butt Joint Techniques
Capillary Action Cementing with Unthickened
Cements
Do not attempt to cement
parts when the temperature
is less than 65
° F.
Technique for Inside Joints
FIGURE 13
FIGURE 15
FIGURE 14
1
⁄
16
" Keep tape back so
a radius of cement is
left.