Multi-station neck forming equipment for ring-pull cans

A multi-station neck forming equipment for ring-pull cans comprising:

• at least two necking stations, each further comprising a main shaft turret assembly, a drive shaft turret assembly, a tailstock support assembly and a frame assembly for supporting the main shaft turret assembly, the drive shaft turret assembly and the tailstock support assembly, wherein
• each main shaft turret assembly includes a main turret shaft, a mold turret assembly, a push plate turret assembly, and a main shaft turret planetary gear located between the mold turret assembly and the push plate turret assembly,
• the mold turret assembly is composed of a group of mold end sleeve assemblies, which are evenly spaced around the main turret shaft in a circumferential direction and positioned relative to the main turret shaft,
• the push plate turret assembly is composed of a group of push plate end push rod assemblies, which are evenly spaced around the main turret shaft in the circumferential direction and positioned relative to the main turret shaft,
• a number of the group of mold end sleeve assemblies is the same as that of the group of push plate end push rod assemblies, the group of mold end sleeve assemblies is located at one end of the main turret shaft in a longitudinal direction, the group of push plate end push rod assemblies is located at the other end of the main turret shaft in the longitudinal direction, and the positions of the group of mold end sleeve assemblies correlate with the positions of the group of push plate end push rod assemblies in the circumferential direction of the main turret shaft,
• the mold end sleeve assembly comprises a mold end sleeve, a mold end push rod, a necking external mold, a necking internal mold and two mold end follower bearings,
• the mold end sleeve is fixedly positioned relative to the main turret shaft, and the mold end sleeve is provided with an inner cylinder surface for slide-and-guide,
• the mold end push rod is of a rod structure, which is inserted into the inner cylinder surface of the mold end sleeve and is axially slidably fitted relative to the inner cylinder surface of the mold end sleeve,
• the necking external mold is fixed on a head of the mold end sleeve for working, the necking internal mold is fixed on a head of the mold end push rod for working, the necking internal mold is located in the necking external mold and able to slide relative to the necking external mold following the sliding of the mold end push rod,
• one of the mold end follower bearing is of a rolling bearing structure, and the two mold end follower bearings are rotationally positioned at a tail of the mold end push rod;
• rotation axes of the two mold end follower bearings are perpendicular to an axis of the mold end push rod;
• the two mold end follower bearings are arranged at intervals in an axial direction of the tail of the mold end push rod to clamp a mold end cam that drives the mold end push rod to slide, wherein:
• one mold end follower bearing is fixedly positioned and connected with the mold end push rod, and the other mold end follower bearing is elastically positioned relative to the mold end push rod in a direction of clamping the mold end cam, thereby constituting a driving structure for elastically clamping the mold end cam,
• the group of push plate end push rod assemblies comprises a linear guide type push plate end push rod assembly or a sleeve type push plate end rod assembly, each including a push plate end push rod, a push plate, and two push plate end follower bearings configured to clamp a push plate end cam with one push plate end follower bearing fixed and the other push plate end follower bearing elastically positioned, thereby forming a driving structure for elastically clamping the push plate end cam,
• a push plate end sleeve assembly comprises a push plate end slider and a push plate end bolt, and
• a bushing is disposed between the push plate end bolt and the push plate end slider, the bushing is fixed in a through hole of the push plate end slider, and the push plate end bolt is slidably fitted with the bushing.