摘要:
A molding apparatus comprising a rigid mold flask adapted to contain a mold pattern and sand, and when containing sand, having a combined center of gravity, a support for resiliently supporting the mold flask for horizontal movement only of the mold flask as a whole body, and a vibrator for shaking the mold flask to provide horizontal vibrational forces directed in a horizontal plane extending approximately through the combined center of gravity.
摘要:
A mold pattern is held in position in a mold flask in an unconnected relation to the mold flask. Sand is supplied to the mold flask to surround the mold pattern while the mold flask is vibrated to compact the sand around the mold pattern.
摘要:
Disclosed herein is an internal combustion engine including a reactor including opposed first and second ends, an outer shell extending between the opposed ends, and a flow path extending between the opposed ends and including an entry opening at the first end, and a discharge opening at the second end, and an engine member including a plurality of spaced combustion chamber portions each including an exhaust port, an exhaust manifold communicating with the exhaust ports and with the entry opening and including a generally vertically extending open side including a portion closed by the reactor outer shell, and an outer wall spaced from the open side of the manifold and also engaging the outer shell of the reactor.
摘要:
A method of molding an integrated structure, the method comprising the steps of (a) using at least first and second mold parts to define a primary mold cavity, (b) placing first molding material in the primary mold cavity to form a primary structure, (c) removing the second mold part from the first mold part, (d) using the first mold part and at least a third mold part to define a secondary mold cavity partially filled by the primary structure, and (e) placing second molding material in the remainder of the secondary mold cavity to form the integrated structure including the primary structure and the second molding material.
摘要:
A method for casting a housing and insert assembly including a housing and a cast-in-place insert. The casting method comprises the steps of providing a prefabricated insert, surrounding the insert with an evaporable foam pattern to form a pattern and insert assembly, and utilizing the pattern and insert assembly in a lost foam casting process wherein the pattern is replaced by a material to form the housing and insert assembly.
摘要:
Disclosed herein is an outboard motor comprising a steerable and tiltable propulsion unit including a lower unit including a vertically extending drive shaft housing, a drive shaft extending vertically in the drive shaft housing and located in a plane extending in a fore and aft direction, and a propeller shaft driven by the drive shaft and extending in the fore and aft plane, and a powerhead comprising a four stroke engine including a vertically extending crankshaft located forwardly of the drive shaft and in laterally spaced relation to the fore and aft plane, a cylinder extending horizontally and radially from the crankshaft and at an acute angle to the fore and aft plane, a camshaft extending generally vertically in the fore and aft plane and in vertical alignment with and in driving connection with the drive shaft, and a gear set drivingly connecting the crankshaft and the camshaft for rotatably driving the camshaft at a rotational speed which is one-half of the rotational speed of the crankshaft.
摘要:
A lost foam pattern for an engine block includes a cylinder and an axially extending transfer passage defined by spaced side walls and an inner wall which is outwardly convex. The pattern further includes a first pattern piece including a wall defining a portion of a cylindrical bore having an axis, and a passage recess extending in the direction of the axis of the cylindrical bore and communicating with the cylindrical bore, which passage recess is defined by opposed walls extending axially with respect to the cylindrical bore and forming the spaced side walls of the transfer passage, a second pattern piece located in the passage recess, having a first arcuate wall forming a continuation of the cylindrical bore portion in the first pattern piece, having a second arcuate wall forming the inner wall of the transfer passage and being outwardly convex, and additional recesses and portions on the first and second pattern pieces for locating the pattern pieces relative to each other and for preventing relative movement therebetween except in the direction opposite the direction of assembly of the pattern pieces.
摘要:
Disclosed herein is a die member for forming a lost foam pattern for casting a cylinder block having a cylindrical bore with an axis and a helical transfer passage including a first portion permitting die member separation in a direction along the axis of the cylindrical bore and a second undercut portion preventing one-piece die member separation in the direction along the axis of the cylindrical bore, which die member comprises a projection forming a first cavity corresponding to a first part of the first portion of the transfer passage, and a core carried by the die member and movable relative to the die member between an extended position forming a second cavity corresponding to a second part of the first portion of the transfer passage and the undercut portion of the transfer passage, and a retracted position affording separation of said core through the second part of the first portion of the transfer passage and in common with separation of said projection from the first portion of the transfer passage in the direction along the axis of the cylindrical bore.
摘要:
The apparatus has a generally cylindrically shaped rotating collar for sealing the chamber after casting material has been poured into it. The apparatus has a slidable plunger mechanism with an enlarged tip for forcing casting material through a shot sleeve toward the die. A flat annular collar retainer plate is located at right end of the collar. A sleeve seal tube is attached to the collar retainer plate adapted to receive the plunger tip. A seal housing is carried by and is slidable on the plunger stem, has an enlarged left end portion in which a sleeve seal is located so that when the plunger mechanism is moved to the left, the plunger tip enters the chamber and the seal housing and plunger stem move to the left until the seal engages the seal tube during leftward movement of the plunger. Further movement of the plunger stem results in the stem sliding relative to the seal housing while the plunger tip forces material in the chamber toward the die cavity. A vacuum is produced behind the plunger tip during movement which prevents premature flow of casting material into the die cavity.
摘要:
Disclosed herein is a lost foam pattern assembly comprising a crankcase section including first and second planar surfaces intersecting at an angle defined therebetween, a port cylinder section fixed to the first surface of the crankcase section, and a starboard cylinder section fixed to the second surface of the crankcase section, which port and starboard cylinder sections are fixed to each other along a glue face located in a plane bisecting the angle.