Construction of compacted room in dust - free workshop
Author: Zhuo for air-conditioning purification Electromechanical Engineering Co., Ltd
Published:2017-09-18 15:54:40Views:3318【SML】
Curing is also called curing, is to have a good composite film into the drying room (curing room), so that the main agent of polyurethane adhesive, curing agent and cross-linked composite substrate surface interaction process.
Text label:
Curing is
also called curing, is to have a good composite film into the drying
room (curing room), so that the main agent of polyurethane adhesive,
curing agent and cross-linked composite substrate surface interaction
process. The main purpose of the aging of the dust-free
workshop is to make the main agent and curing agent for a certain period
of time to fully respond to achieve the best composite strength;
followed by the removal of low boiling point residual solvent, such as
ethyl acetate.
1) The higher the curing
temperature, the more favorable to ensure the composite strength,
shorten the curing time, but may lead to film shrinkage deformation,
smoothness deterioration, while energy consumption increased.
2)
The longer the curing time is, it is beneficial to ensure the full
curing of the glue, but too long curing time is unfavorable to the
production, because it increases the risk of waiting time, prolongs the
delivery time, takes up more Working capital, increased energy consumption and so on.
Therefore,
the clean room should be considered a comprehensive balance of aging,
through the experiment to find each product the best curing temperature
and time to improve the process, reduce the curing temperature, reduce
the aging time has great economic significance.
[Analysis and focus]:
Analysis points one:
As
the density of air in the dust-free workshop changes with the
temperature of the air, it greatly affects the air flow direction. 40 ℃ below the air flow direction, can choose to send the next back;
40 ℃ above, should be used to send the level of horizontal or back to
the next way back.
Focus: on the next delivery, prone to air temperature is different,
the formation of the temperature layer is not the same, resulting in
temperature, so that aging products are not uniform.
Analysis points two:
Excessive outlet temperature, filter and lamp variants.
Focus: If the high temperature of the curing room need to pay
attention to the installation of the outlet and lamps must be used high
temperature materials.
Analysis points three:
Large temperature difference between the area, the door must have enough insulation layer. Must be tight.
Focus: the door to heat insulation effect, to prevent the temperature string.
Analysis points four:
Air conditioning equipment configuration
Focus: air conditioning motor due to high temperature gas in the cycle, need to set the external motor.
Analysis points five:
Heat source selection, can choose hot water, hot oil and electric heating.
Focus:
hot water for 40 ℃ below the curing room; hot oil and electric heating
for 40 ℃, but the temperature is too high, need to do double overheating
protection and shutdown protection work. To prevent electrical heating control malfunction, resulting in accidents.
Concerned about