Abstract A pneumatic-hydraulic control system for an apparatus for molding a shoe sole, in which a mold cavity is formed by a first fixed mold and a second mold movable relative to the first mold for opening and closing the mold cavity includes a mold operating cylinder with an operating piston movable therein, a piston rod connecting the operating piston to the second mold and a line connecting one side of the operating piston to a source of operating fluid for moving the second mold towards the first mold. A control cylinder with a control piston therein has one end in fluid communication with the operating cylinder and another end in fluid communication with the source of operating fluid, whereby the control piston moves in unison with the operating piston. A valve is provided in the line connecting the source of operating fluid to the operating cylinder for preventing the return of fluid to the reservoir from the operating cylinder when the second mold and operating piston are moving away from the first mold. An adjustable stop in the form of a knurled nut is connected to the piston rod of the control piston for limiting movement of such piston and consequently of the operating piston and the second mold away from the first mold.
A control system for a molding apparatus, in which a mold cavity is formed by a first fixed mold and a second mold movable relative to the first mold for opening and closing the mold cavity, the control system comprising a mold operating cylinder with an operating piston movable therein; a piston rod connecting the operating piston to the second mold; supply means for connecting said operating cylinder on one side of the operating piston to a source of operating fluid for moving the second mold towards the first mold; a control cylinder with a control piston therein having one end in fluid communication with the operating cylinder and another end in fluid communication with the source of operating fluid, whereby the control piston moves in unison with the operating piston; a valve in said supply means for preventing the return of fluid to the reservoir from the operating cylinder when the second mold and operating piston are moving towards the first mold; and an adjustable stop means connected to the control piston for directly limiting movement thereof and consequently of the operating piston and the second mold away from the firsT mold.
Claim 2
Dependent Claim
193 words
A control system for a molding apparatus, in which a mold cavity is formed by a first fixed mold and a second mold movable relative to the first mold for opening and closing the mold cavity, the control system comprising a mold operating cylinder with an operating piston movable therein; a piston rod connecting the operating piston to the second mold; supply means for connecting said operating cylinder on one side of the operating piston to a source of operating fluid for moving the second mold towards the first mold; a control cylinder with a control piston therein having one end in fluid communication with the operating cylinder and another end in fluid communication with the source of operating fluid, whereby the control piston moves in unison with the operating piston; a valve in said supply means for preventing the return of fluid to the reservoir from the operating cylinder when the second mold and operating piston are moving towards the first mold; and an adjustable stop means connected to the control piston for directly limiting movement thereof and consequently of the operating piston and the second mold away from the firsT mold.
Claim 3
Dependent Claim
37 words
A control system according to claim 1, including switch means associated with said first and second molds for closing said valve in the supply means in response to movement of one mold relative to the other mold.