Apparatus for lubricating moulds for blanks
AssigneeIng. C. Olivetti & C., S.p.A.
InventorRenzo Fedrigo
Life of this patent
Estimating the term…
Abstract
An apparatus for lubricating the internal wall of moulds for blanks comprises a corona charger for charging electrically the lubricant which is then injected into the mould. This latter is maintained at an electric potential such as to attract the lubricant and cause it to be deposited on the inside walls of the mould.
Claims8
In a press for compacting powdered material for sintered parts of high density, comprising a mould and at least one plunger adapted to be actuated by a cyclic shaft to effect a preliminary compacting, an electrodynamic unit for the high density compacting and including an apparatus for lubricating the mould comprising a reservoir for mixing the lubricant with dry air, a corona charger connected to said reservoir for charging electrostatically the mixture of said lubricant and dry air, a distributor connected to said corona charger actuatable for injecting said mixture into said mould, means operative to maintain the mould at an electric potential such as to attract the lubricant and cause it to be deposited on the inside walls of the mould, an element carried by the said shaft for actuating said injecting distributor in a predetermined time relationship with respect to said compactings, and a recycling blower connected between said distributor and said reservoir so as to keep said mixture in circulation.
An apparatus for lubricating a mould for blanks, comprising:
- a reservoir for mixing the lubricant with dry air,
- a corona charger connected to said reservoir for charging electrostatically the mixture of said lubricant and dry air,
- a distributor connected to said corona charger for injecting said mixture into said mould,
- means operative to maintain the mould at an electric potential such as to attract the lubricant and cause it to be deposited on the inside walls of the mould, and
- a recycling blower connected between said distributor and said reservoir so as to keep said mixture in circulation.
An apparatus for lubricating moulds for blanks comprising a reservoir for mixing dry air with the lubricant, a corona charger for electrically charging the mixture of air and lubricant, said reservoir being connected to the corona charger, injecting means for injecting said mixture of air and lubricant inside the mould, said injecting means including a distributor connected to said corona, a valve connected to the distributor and actuatable to control the injection of the mixture, means operative to maintain the mould at an electric potential such as to attract the lubricant and cause it to be deposited on the inside walls of the mould, a recycling blower connected between the distributor and the reservoir, and actuating means for actuating said valve so as to cause said blower to keep the dry air and lubricant mixture continuously in circulation when the valve is not actuated, while the mixture is injected into the mould when the valve is actuated.
Dependencies are inferred from the claim text.