DE102022130853A1 - Multi-channel nozzle device for additive product manufacturing - Google Patents

Abstract

In a device (100) for carrying out additive product manufacturing, with at least one nozzle with an inner bore for conveying a curable substance for application first to a base substrate (200) and subsequently to a structure made of curable substance, increased stability compared to the prior art is achieved in that a plurality of identically aligned nozzles (110) are combined in a block (120), the direction of movement of which can be controlled when beads (210) are applied, and which is simultaneously mounted so as to be displaceable by a predetermined amount at right angles to the direction of movement.

Description

The invention relates to a device for carrying out additive product manufacturing, with at least one nozzle with an inner bore for conveying a curable substance for application first to a base substrate and subsequently to a structure made of curable substance.

Devices of the type mentioned above are used in the prior art to produce products of various shapes, particularly those with concave/convex surface structures, by means of numerically controlled 3D printing. However, the known devices all have the disadvantage that the mutual adhesion of successively applied layers of substance is too low for some applications.

The object of the invention is therefore to provide a device with the aid of which the mutual adhesion of successively applied substance layers is significantly increased compared to the devices known in the prior art.

For a device of the type mentioned at the outset, this object is achieved according to the invention in that a plurality of identically aligned nozzles are combined in a block, the direction of movement of which can be controlled when applying strands of substance called beads, and which is simultaneously mounted so as to be displaceable by a predetermined amount at right angles to the direction of movement.

Preferred embodiments of the invention are the subject of the subclaims, the elements of which act in the sense of a further improvement of the approach to solving the problem underlying the invention.

In the device according to the invention, by means of the combination of features that a plurality of equally aligned nozzles are combined in a block, the direction of movement of which can be controlled when beads are applied, and which is simultaneously mounted so as to be displaceable by a predetermined amount at right angles to the direction of movement, the mutual adhesion of successively applied substance layers is increased compared to the devices known in the prior art in that a plurality of beads arranged next to one another and thus forming a wave field can be produced during product production, wherein during successive application the production substance emerging through the nozzles can be positioned in such a way that a wave crest is applied to a wave trough, whereby a mutual and thus stability-providing interlocking of wave crests and wave troughs can be produced.

According to a first preferred embodiment of the device according to the invention, it is provided that the nozzles are arranged equidistantly.

According to another preferred embodiment of the device according to the invention, a plurality of nozzles are provided, each aligned linearly in a line and aligned parallel to one another.

The majority of nozzles are combined in a single, one-piece block that is mounted for linear movements to form straight beads arranged side by side.

In addition to the above design, the block is movably mounted and controllable to execute concentric arcs to form adjacent curved tracks.

The nozzles preferably, but not necessarily, have mutually differently shaped lower surfaces. The lower surfaces of the nozzles can be convexly curved and in particular circularly curved.

In particular, the lower surfaces of the nozzles can be provided with an undercut and be concavely curved.

Alternatively, the lower surfaces of the nozzles can also have individually stochastically formed different shapes.

According to an important preferred embodiment of the device according to the invention, the predetermined amount of movement of the block at right angles to the direction of movement or conveying direction is dimensioned to the width of the caterpillars, each of which has an equal width.

Furthermore, the block can be mounted so as to oscillate at right angles to the direction of movement by a predetermined amount, in particular the width of a caterpillar.

The device according to the invention can be operated using very different substances. For example, the following substances are suitable for use: thermoplastic polyurethanes, polyamide, polylactide, liquid bisphenol diphenyl phosphates, polypropylene, polycarbonates, polyethylene terephthalate glycol, acrylonitrile butadiene styrene.

• 1 eine bevorzugte Ausführungsform des Blocks der erfindungsgemäßen Vorrichtung in einer Seitenansicht;
• 2 die Spur eines Auftrags einer Substanz in Form eines Stranges (Raupe) auf ein Grundsubstrat mittels der in 1 dargestellten bevorzugten Ausführungsform der erfindungsgemäßen Vorrichtung in einer Ansicht von schräg oben;
• 3 eine weitere bevorzugte Ausführungsform des Blocks der erfindungsgemäßen Vorrichtung in einer Querschnittsansicht.

The device according to the invention is explained below using a preferred embodiment, which is shown in the figure of the drawing. Therein show:

• 1 a preferred embodiment of the block of the device according to the invention in a side view;
• 2 the trace of an application of a substance in the form of a strand (bead) onto a base substrate by means of the 1 illustrated preferred embodiment of the device according to the invention in a view obliquely from above;
• 3 a further preferred embodiment of the block of the device according to the invention in a cross-sectional view.

The 1 to 3 The device 100 according to the invention shown is intended for carrying out additive product manufacturing and contains a plurality of nozzles 110, each with an inner bore for conveying a curable substance for application first to a base substrate 200 and subsequently to a structure made of curable substance.

The plurality of nozzles 110 are aligned in the same direction and combined in a block 120, the direction of movement of which can be controlled when beads 210 are applied, and which is simultaneously mounted so as to be displaceable by a predetermined amount at right angles to the direction of movement.

The predetermined amount of movement of the block 120 at right angles to the direction of movement or conveying direction is dimensioned to the width of the tracks 210, each of which has the same width.

The nozzles 110 of the block 120 are arranged equidistantly, with the plurality of nozzles 110 being parallel to one another and linearly aligned in a line.

The block 120 is mounted and controllable both for linear movements in order to form straight caterpillars 210 arranged next to one another, and is also movably mounted and controllable in order to execute concentric arcs in order to form curved caterpillars 210 arranged next to one another.

The lower surfaces 111 of the nozzles 110 are concavely curved.

Alternatively, the block 120 is mounted so as to be oscillatable at right angles to the direction of movement by an amount corresponding to the width of a respective track 210.

The embodiment of the invention explained above serves only for the purpose of a better understanding of the inventive teaching specified by the claims, which as such is not limited by the embodiment.

List of reference symbols

100

contraption

110

jet

111

Bottom surface

120

block

200

Base substrate

210

Caterpillar

Claims (10)

Device (100) for carrying out additive product manufacturing, with at least one nozzle with an inner bore for conveying a curable substance for application first to a base substrate (200) and subsequently to a structure made of curable substance, characterized in that a plurality of identically aligned nozzles (110) are combined in a block (120), the direction of movement of which can be controlled when applying beads (210), and which is simultaneously mounted so as to be displaceable by a predetermined amount at right angles to the direction of movement. Device (100) according to Claim 1 , characterized in that the nozzles (110) are arranged equidistantly. Device (100) according to one of the Claims 1 or 2 , characterized in that a plurality of nozzles (110) are provided, each aligned linearly in a line and aligned parallel to one another. Device (100) according to one of the Claims 1 or 2 , characterized in that the plurality of nozzles (110) are combined in a block (120) which is mounted for linear movements to form rectilinear beads (210) arranged side by side. Device (100) according to one of the Claims 1 or 2 , characterized in that the plurality of nozzles (110) are combined in a block (120) which is movably mounted to execute concentric arcs to form curved beads (210) arranged side by side. Device (100) according to one of the Claims 1 or 2 , characterized in that the plurality of nozzles (110) are combined in a block (120) which is mounted both for linear movements to form juxtaposed straight beads (210) and movably mounted to execute concentric arcs to form juxtaposed curved beads (210). Device (100) according to one of the Claims 1 until 4 , characterized in that the nozzles (110) have differently shaped lower surfaces (111). Device (100) according to one of the Claims 1 until 4 , characterized in that the lower surfaces (111) of the nozzles (110) are convexly curved. Device (100) according to one of the Claims 1 until 4 , characterized in that the lower surfaces (111) of the nozzles (110) are circularly curved. Device (100) according to one of the Claims 1 until 4 , characterized in that the lower surfaces (111) of the nozzles (110) each have individually stochastically formed different shapes.

Images