A mold for an apparatus to produce plastic pipe and method to use it

A mold for an apparatus to produce plastic pipe that has been adapted for the production of the plastic pipe that rotates in the production process and that mold consists of:

• a body that has been supported to its place;
• the roll like roll organs that have been supported to the body by support organs and that have been set to move the plastic pipe axially in its production process;
• at least four chain organs the chains of which consist of the mentioned roll organs and the joints between them, and where;
• each chain has been set to go round at least two chain wheels;
• each joint has been supported to its axis by two conductors that have been set to conduct the mentioned rotation movement of the chain wherein:
• the mold has been set not to rotate with the plastic pipe in production,
• the mold has been set to function inside or outside the plastic pipe,
• the conductors of each chain organ consist of at least one essentially mold center axis direction part and the center axes of the roll organs that are at the location of these parts are parallel to the center axis of the mold and the mentioned roll organs have been set to be in contact with the inside surface or the outside surface of the plastic pipe and to rotate round its center axes during the production of the mentioned pipe,
• at least one chain wheel of each chain organ has been set to be powered to move the chain and to rotate by the motor power around its axis at such a speed and in such a direction that the roll organs in the chain in such a place as defined in the position h) are able to move into the production direction of the plastic pipe in its production speed and as not gliding against the sur-face of the mentioned pipe can thus move the plastic pipe.

The mold to produce plastic pipe consisting of:

• a body that has been supported to its place;
• the roll like roll organs, that have been supported to the body by support organs and that have been set to move the plastic pipe axially in the production process;
• at least four chain organs the chains of each of which consist of the mentioned roll organs and the joints between them, and where:
• each chain has been set to go round at least two chain wheel;
• each joint has been supported with its axis at the ends of the mentioned axis with at least two conductors that have been set to conduct the mentioned chain circular motion, wherein;
• the mold has been set not to rotate with the plastic pipe in production,
• the mold has been set to function inside or outside the plastic pipe;
• there has been set a support layer on the outside diameter or inside diameter of the mold;
• that consists at least of two loop like ribbons side by side that have been set to rotate on the mold with such a rise that it produces a sufficiently tight layers concerning the support of the surface of the mold;
• and
• which ribbons have been set to return during the production process of the plastic pipe from the second end of the mold through the return organs via the opening in the body back to the first end of the mold in order to be fed tangentially back to the mold outside or inside;
• the conductors of each chain organ consist essentially at least of one part that has the same direction as mold center axis and the center axes of the roll organs that are in the places of these parts are parallel to the center axis of the mold and the mentioned roll organs have been set to be in contact against the ribbons during the production of the mentioned pipe;
• at least one chain wheel of each chain organ has been set to be a powered wheel to move the chain to rotate the wheel by motor around its center axis at such a speed and in such a direction that the roll organs that have been defined in the previous position are able to move into the production direction of the plastic pipe at the production speed and thus make the plastic pipe move.