Heat Sink Assembly Press
Designed for volume assembly of heat sinks to their components.
Pneumatic Press Tooling uses an automated heat sink assembly press specifically designed for volume assembly of heat sinks to their components. The pneumatic heat sink assembly press consists of three parts, the main base, and two piston storage racks. Once the storage racks are attached to the press, the pistons can be installed into these racks. There are eight large pistons on one side and eight small pistons on the other side. Pistons are installed into the storage rack by simply placing the plunger pad into the slot, aligning it with the cut-out, turning one-quarter turn, and then dropping the lock down so the top lock is engaged and the pistons cannot be removed. Pistons can then be attached to the manifold. Standard shop air (80 psi) can also be attached. Datum Dymanics provides the fittings, however, if you have your own fittings they can be swapped out.
Pneumatic press tooling heat sink assembly also has adjustments that can be made on the fixture. There is a downward speed which is usually preset to create a slower approach to for the piston to engage on top of the heat sink. Adjustments can be made on each individual manifold block as we have a split system with 2 pressure regulators which can be engaged separately with the 2 pressure gauges that are supplied. Once the pistons are engaged we have a timer which can be set for the appropriate length of time the pressure is kept on the heat sink.
The heat sink assembly press has a start button and an emergency stop button. The load cell, which is supplied and can fit into the storage rack, is then used to set the piston schedule. The load cell is placed exactly underneath the piston. When we power on the start button, the piston will come down and read the pressure. If more or less pressure is required then the appropriate manifold block can be adjusted. Once the preset is engaged then we can install the heat sink kit which consists of a base, an alignment jig, and a top plate. The top plate has two rails so it can slide in like a drawer. When this drawer assembly is slid in all the way, there are two safety catches that lock the plate in place. The base plate is then installed which has three locating pins. Once the base plate is installed there are 3 more locating pins for 3 separate PCBs. Once the boards are placed upon the pins, the alignment jig is placed over the boards and the heat sinks are placed on top of the board.
Pneumatic Press Tooling operation can commence when the pistons have been selected, installed, and attached to the manifold. To start the operation, the drawer has to be fully closed and the start button set. Twin start buttons allow the top plate to lower allowing any number of weights to pre-load each individual heat sink. When the drawer is closed, it is locked in position by a pneumatic actuator. When the start button is pressed and the pistons engage, the door cannot be opened. A timer prevents the drawer from being opened until the preset adhesive curing time has been reached. Once the cycle is complete the door can be opened and then the operation can be repeated. However at any time, if needed, the emergency stop button can be pressed and the drawer can be opened.
The drawer assembly allows convenient access to:
Load the pcb.
Apply thermal adhesive.
Accurately locate the heat sinks.
When the drawer is closed it is locked in position by a pneumatic actuator.
Twin start buttons allow the top plate to lower allowing any number of weights to pre-load each individual heat sink.
A timer prevents the drawer from being opened until the preset adhesive curing time has been reached.
Safety Features:
Fully enclosed design.
Twin start buttons.
Manual reset.
Safety valves locking the top weighted plate in position upon loss of air supply.