Long-life die for the manufacturing of elongate bodies

A machine for producing heads on elongated bodies, the machine comprising:

• at least one die comprising
• a body with a top surface provided with a through-going groove to receive and hold an elongate body longitudinally in said groove,
• a recess at one end of the groove configured to form the heads on the elongate bodies,
• a side surface comprising a first portion with a curved shaped configured for press fit by contact with a curved portion of an inner surface of a bore or hole in the associated die holder, and
• a stop surface configured to engage a stop part in the hole or bore of the associated die holder, so as to determine a height of the die in relation to the associated die holder,
• wherein the side surface further comprises a second portion configured to engage with a corresponding portion of the inner surface of the bore or hole in the associated die holder to guide angular orientation of the groove relative to the associated die holder, and
• a die holder comprising
• a body having a surface part, and
• a plurality of holes or bores in the surface part, wherein each of the plurality of holes or bores has a first inner side surface portion with a curved shaped and configured for receiving a die and for press fit engagement with the die by contact with a side surface of the die, wherein each of the holes or bores has a second inner side surface portion are configured to engage with a corresponding side surface portion of the die to fix angular orientation of the die relative to the die holder, and
• wherein in each of the holes or bores has a stop part configured to fix a height of a top surface of the die in relation to the surface part of the die holder.

Manufacturing a head on an elongate body using at least one of:

• a die comprising
• a body with a top surface provided with a through-going groove to receive and hold an elongate body longitudinally in said groove,
• a recess at one end of the groove configured to form the heads on the elongate bodies,
• a side surface comprising a first portion with a curved shaped configured for press fit by contact with a curved portion of an inner surface of a bore or hole in the associated die holder, and
• a stop surface configured to engage a stop part in the hole or bore of the associated die holder, so as to determine a height of the die in relation to the associated die holder,
• wherein the side surface further comprises a second portion configured to engage with a corresponding portion of the inner surface of the bore or hole in the associated die holder to guide angular orientation of the groove relative to the associated die holder, and
• a ring-shaped die holder comprising
• a body having a surface part, and
• a plurality of holes or bores in the surface part, wherein each of the plurality of holes or bores has a first inner side surface portion with a curved shaped and configured for receiving a die and for press fit engagement with the die by contact with a side surface of the die, wherein each of the holes or bores has a second inner side surface portion are configured to engage with a corresponding side surface portion of the die to fix angular orientation of the die relative to the die holder, and
• wherein in each of the holes or bores has a stop part configured to fix a height of a top surface of the die in relation to the surface part of the die holder.

A method of manufacturing nails comprising:

• press fitting, by contact, a first side surface portion with a curved shape of the die with a curved second inner surface portion of a hole or bore in a die holder,
• engaging a stop surface of the die with a stop part in the hole or bore of the die holder, so as to determine a height of the die in relation to the die holder,
• fixing angular position of the die relative to the die holder by engaging a second side surface portion, such as a plane side surface portion, of the die with a corresponding second inner surface portion of the hole or bore in the die holder, and
• receiving and holding an elongate body longitudinally in a groove on a top surface of a die, and
• forming a head on an elongate body via a recess at one end of the groove of the die.