Rotational molding apparatus

Claim 2

A synthetic resin molding apparatus comprising a first guide track extended between a molded article withdrawal station and a material feeding station, a plurality of second guide tracks arranged substantially in parallel relation with said first guide track and respectively passing through heating furnaces and cooling chambers, and third guide Tracks provided on the both sides of said first and second guide tracks mounted with carriages capable of reciprocating in the direction substantially perpendicular to said first and second guide tracks and having rack carrying tracks capable of joining said first and second guide tracks, aforesaid tracks forming together a plurality of circulating paths consisting of the material feeding station, the heating furnace, the cooling chamber, and the molded article withdrawal station arranged successively while utilizing said material feeding station and said molded article withdrawal station in common, and a plurality of racks having drive means thereon for rotating the mold and moving the racks along said circulating paths through a plurality of stations to thereby melt and mold the synthetic resin while moving said molds and racks along said circulating paths.

Claim 3

A rotational synthetic resin molding apparatus as defined in claim 1 having heating furnaces and racks characterized in that said racks are provided with driving source mechanisms for the rotation of molds and self travelling at the side thereof, said driving source mechanism and said molds properly spaced apart, said heating furnaces provided with notched channels in the horizontal direction over the entire length of their side walls so that the racks carrying said molds can pass through the furnaces while the molds and the driving source mechanisms are located inside and outside of the furnaces respectively.

Claim 4

A heating furnace as defined in claim 2 characterized in that a plurality of heat shield plates parallel to each other are provided over the entire length of the both of the opposing faces of the notched portions formed in the heating furnace, said heat shield plates being parallel to said notched portions.

Claim 5

A rack as defined in claim 2 characterized in that a plurality of heat shield plates parallel to each other are provided on the locations corresponding to the notched portions of the heat furnace and parallel thereto in an overlapping arrangement.

Claim 6

A synthetic resin molding apparatus comprising; a first guide track extended between a molded article withdrawal station and a material feeding station, a plurality of second guide tracks arranged substantially in parallel with said first guide track and respectively passing through heating furnaces and cooling chambers, and third guide tracks provided on the both sides of said first and second guide tracks mounted with carriages capable of reciprocating in the direction substantially perpendicular to said first and second guide tracks and having rack carrying tracks capable of joining said first and second guide tracks, aforesaid tracks forming together a plurality of circulating paths consisting of the material feeding station, the heating furnace, the cooling chamber, and the molded article withdrawal station arranged successively while utilizing said material feeding station and said molded article withdrawal station in common, a plurality of racks for rotating with and moving the molds along said circulating paths to thereby melt and mold the synthetic resin while moving said molds and racks along said circulating paths, wherein said molds are rotatably supported on the racks, one of two splittable mold parts constituting said molds detachable from the rotating racks at the time of splitting and the other part is supported as it is on the racks, a split mold mounting platform located for up and downward movement below the rotary molds supported by said racks, said split mold mounting platform adapted to move in the direction away from said the other split mold part supported on the racks after placing thereon the splitted molds, a molded article mounting platform located for up and downward movement below said other split mold part after the movement of said split mold mounting platform, and said molded article mounting platform adapted to move in the direction away from the other split mold part.

Claim 7

A synthetic resin molding apparatus comprising; a first guide track extended between a molded article withdrawal station and a material feeding station, a plurality of second guide tracks arranged substantially in parallel with said first guide track and respectively passing through heating furnaces and cooling chambers, and third guide tracks provided on the both sides of said first and second guide tracks mounted with carriages capable of reciprocating in the direction substantially perpendicular to said first and second guide tracks and having rack carrying tracks capable of joining said first and second guide tracks, aforesaid tracks forming together a plurality of circulating paths consisting of the material feeding station, the heating furnace, the cooling chamber, and the molded article withdrawal station arranged successively while utilizing said material feeding station and said molded article withdrawal station in common, a plurality of racks for rotating with and moving the molds along said circulating paths to thereby melt and mold the synthetic resin while moving said molds and racks along said circulating paths, wherein said molds are rotatably supported on the racks, one of two splittable mold parts constituting said molds detachable from the rotating racks at the time of splitting and the other part is supported as it is on the racks, a split mold mounting platform located for up and downward movement below the rotary molds supported by said racks, said split mold mounting platform adapted to move in the direction away from said the other split mold part supported on the racks after placing thereon the splitted molds, a molded article mounting platform located for up and downward movement below said other split mold part after the movement of said split mold mounting platform, and said molded article mounting platform adapted to move in the direction away from the other split mold part.

Claim 8

A synthetic resin moldIng apparatus comprising; a first guide track extended between a molded article withdrawal station and a material feeding station, a plurality of second guide tracks arranged substantially in parallel with said first guide track and respectively passing through heating furnaces and cooling chambers, and third guide tracks provided on the both sides of said first and second guide tracks mounted with carriages capable of reciprocating in the direction substantially perpendicular to said first and second guide tracks and having rack carrying tracks capable of joining said first and second guide tracks, aforesaid forming together a plurality of circulating paths consisting of the material feeding station, the heating furnace, the cooling chamber, and the molded article withdrawal station arranged successively while utilizing said material feeding station and said molded article withdrawal station in common, a plurallity of racks for rotating with and moving the molds along said circulating paths to thereby melt and mold the synthetic resin while moving said molds and racks along said circulating paths, wherein said mold comprises two mold parts capable of splitting and closing, one of said two mold parts having at the back to back outer sides thereof projected plates provided with engaging rods projecting in parallel with the direction of closing said mold parts, the other mold part having stop portions respectively projecting outwardly provided with engaging holes capable of inserting said engaging rods therethrough, said stop portions being respectively apertured with the locking rod insertion holes which intersect said engaging holes, said locking rod insertion holes being inserted with locking rods formed with engaging rod insertion notches aligning with said engaging holes, and the locking rod stopping notches being provided on the said engaging rod at the faces opposed to said locking rods.

Claim 9

A synthetic resin moldIng apparatus comprising; a first guide track extended between a molded article withdrawal station and a material feeding station, a plurality of second guide tracks arranged substantially in parallel with said first guide track and respectively passing through heating furnaces and cooling chambers, and third guide tracks provided on the both sides of said first and second guide tracks mounted with carriages capable of reciprocating in the direction substantially perpendicular to said first and second guide tracks and having rack carrying tracks capable of joining said first and second guide tracks, aforesaid forming together a plurality of circulating paths consisting of the material feeding station, the heating furnace, the cooling chamber, and the molded article withdrawal station arranged successively while utilizing said material feeding station and said molded article withdrawal station in common, a plurallity of racks for rotating with and moving the molds along said circulating paths to thereby melt and mold the synthetic resin while moving said molds and racks along said circulating paths, wherein said mold comprises two mold parts capable of splitting and closing, one of said two mold parts having at the back to back outer sides thereof projected plates provided with engaging rods projecting in parallel with the direction of closing said mold parts, the other mold part having stop portions respectively projecting outwardly provided with engaging holes capable of inserting said engaging rods therethrough, said stop portions being respectively apertured with the locking rod insertion holes which intersect said engaging holes, said locking rod insertion holes being inserted with locking rods formed with engaging rod insertion notches aligning with said engaging holes, and the locking rod stopping notches being provided on the said engaging rod at the faces opposed to said locking rods.

Claim 10

A synthetic resin molding apparatus comprising; a first guide track extended between a molded article withdrawal station and a material feeding station, a plurality of second guide tracks arranged substantially in parallel with said first guide track and respectively passing through heating furnaces and cooling chambers, and third guide tracks provided on the both sides of said first and second guide tracks mounted with carriages capable of reciprocating in the direction substantially perpendicular to said first and second guide tracks and having rack carrying tracks capable of joining said first and second guide tracks, aforesaid tracks forming together a plurality of circulating paths consisting of the material feeding station, the heating furnace, the cooling chamber, and the molded article withdrawal station arranged successively while utilizing said material feeding station and said molded article withdrawal station in common, a plurality of racks for rotating with and moving the molds along said circulating paths to thereby melt and mold the synthetic resin while moving said molds and racks along said circulating paths, wherein said racks are provided with driving source mechanisms for the rotation of molds and self moving at the side thereof, said driving source mechanism and said molds properly spaced apart, said heating furnaces provided with notched channels in the horizontal direction over the entire length of their side walls so that the racks can pass through the furnaces while the molds and the driving source mechanisms are located inside and outside of the furnaces respectively and liquid reservoir recesses for the cooling are provided in each of the bearing portions for the wheel shaft and rotating shaft of the racks.

Claim 11

A synthetic resin molding apparatus comprising; a first guide track extended between a molded article withdrawal station and a material feeding station, a plurality of second guide tracks arranged substantially in parallel with said first guide track and respectively passing through heating furnaces and cooling chambers, and third guide tracks provided on the both sides of said first and second guide tracks mounted with carriages capable of reciprocating in the direction substantially perpendicular to said first and second guide tracks and having rack carrying tracks capable of joining said first and second guide tracks, aforesaid tracks forming together a plurality of circulating paths consisting of the material feeding station, the heating furnace, the cooling chamber, and the molded article withdrawal station arranged successively while utilizing said material feeding station and said molded article withdrawal station in common, a plurality of racks for rotating with and moving the molds along said circulating paths to thereby melt and mold the synthetic resin while moving said molds and racks along said circulating paths, wherein said racks are provided with driving source mechanisms for the rotation of molds and self moving at the side thereof, said driving source mechanism and said molds properly spaced apart, said heating furnaces provided with notched channels in the horizontal direction over the entire length of their side walls so that the racks can pass through the furnaces while the molds and the driving source mechanisms are located inside and outside of the furnaces respectively and liquid reservoir recesses for the cooling are provided in each of the bearing portions for the wheel shaft and rotating shaft of the racks.