Plastic article or earthenware shaping or treating: apparatus – Means applying electrical or wave energy directly to work – Electro-static or inductive field
Patent
1985-05-16
1987-06-16
Chiesa, Richard L.
Plastic article or earthenware shaping or treating: apparatus
Means applying electrical or wave energy directly to work
Electro-static or inductive field
425233, 425292, 425550, 425553, B29C 3508
Patent
active
046733450
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to an arrangement for the manufacture of an elongated organ in which a compression arrangement is so executed and arranged as to displace and compress a quantity of material moistened with a bonding agent.
SUMMARY OF THE INVENTION
The present invention relates to apparatus for producing an elongated element, and in particular to such apparatus as those in which fibrous material provided with a binding agent is subjected to compression forces. The apparatus comprises a compression chamber equipped with compressing means, and the fibrous material required to produce the elongated element is introduced into the compression chamber in batches, or all at once. The compressing means are arranged to first subject the fibrous material to compression forces, and to then move the fibrous material along a matrix, whereafter the compressing means are returned and moved out of the compression chamber, which is then filled with a further batch of fibrous material, this further batch then being compressed and displaced along the matrix by the compressing means.
The matrix comprises a plurality of wall sections, of which at least a number are arranged for movement relative to the compressed fibrous material and the aforesaid element, with the relative movement preferably being effected in the direction of the longitudinal axis of said element or in the direction in which it is produced.
The present invention can be applied both in the manufacture of an elongated element having incorporated therein reinforcing rods, bands, wires or like stiffeners, which increase the bending resistance of the element, and also in the manufacture of an elongated element which lacks the inclusion of such stiffeners.
The starting material used to produce the elongated element either comprises a fibre-suspension to which a binder has been added, where the suspension is compressed and then cured to produce a finished element, or a fibrous material which is sprayed or moistened with a binder and the material then subjected to pressure and cured, to form the finished element.
DESCRIPTION OF THE PRIOR ART
Previously disclosed are a large number of different arrangements for the manufacture of an elongated organ in which a compression arrangement is also so arranged as to displace and compress a quantity of material moistened with a bonding agent, in particular an adhesive.
It can thus be mentioned that in German Offenlegungsschrift 1 019 951 is previously disclosed a method of manufacturing an elongated organ by causing a portion of the total quantity of the fibrous material intended for the entire organ to be introduced into a compression chamber where the portion is compressed by a compressing organ. The compressing organ is capable of then being caused to move out of the compression so that a new portion of the fibrous material can be introduced into the compression chamber, which is then compressed once more.
Also previously disclosed in Swedish Patent Specification 416 718 is an arrangement for the manufacture of an elongated organ or product by the compression of a fibrous material to which a bonding agent has been added, in such a way that a portion of the total quantity of the fibrous material intended for the entire organ can be place inside a compression chamber with a compressing organ. The compressing organ is so activated as first to apply compressive force to the portion followed by its displacement into a mould, and then to move in the opposite direction and to be displaced from the compression chamber, which can then be filled once more with a portion of the fibrous material. The new portion is itself compressed and displaced by the compressing organs. It is specifically intended here that the mould shall be so executed as to exhibit a number of wall parts, all of which are caused to move relative to the organ, said relative movement occurring in the longitudinal and/or production sense of the organ.
It is also known, for example from Swedish Patent Specification No. 206 821, in
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