Exchangable screw part

0001Planetary gear extruder having at least one roller part, wherein the roller part of an outer segment, an internally toothed roller cylinder, a driven main spindle and several around the main spindle arranged planetary spindles is formed.

0002are known for the system planetary roller extruder (PWE) in so-called modular design, the modularity relates it, that rolling parts in the design and interpretation of different Roll portion length, divided or undivided, with possibilities of degassing equipped or injection and other process variants will.

0003But the modularity refers not to the fact that individual segments a rolling part are mutually fitted. particularly well do not insist that the roller portions are rotatable, that is, that the inlet and outlet of each rolling subsegment are designed equal. This but would ensure that assembly, handling and lifetime extension be substantially improved.

0004The essential disadvantage of the above described embodiment is that the previously known and exported rolled parts incompatible are. That is, in particular to the design and interpretation carried out the individual parts of the rolling part with each other can not be exchanged are. It would be desirable, however, that individual segments particularly with changing process requirements or different advanced Wear of individual segments were absolutely interchangeable. Benefits would also result for assembly by parts not can be reversed mounted more.

0005The <b>task</b> the invention it is, the previous design or the concept behind remodel so the absolute ensure modularity.

0006The <b>solution</b> the task is in conjunction with the preamble of claim 1 characterized in that the rolling part has a having region that is symmetrical about an axis of symmetry.

0007Training is provided according to that this symmetry axis a forms a right angle to the direction of extrusion. This symmetry are the complete or the roller member (s) or segments of a rolling part interchangeable and even rotate.

0008This also leads in particular to an absolute freedom in compiling of individual components and their positioning in the course the rolling part.

0009Several such elements may be connected by means of a connecting ring will. These connecting rings are again equal constructed so that a wrong installation position is prevented.

0010At the end viewed in the extrusion direction, a closure ring is arranged, in turn in relation to the roller part in the corresponding area has the same geometry as the connection rings.

0011The connecting rings may be varied in the inside diameter, so that the function of the known or congestion enables Dispergierringe becomes. The connecting rings have also at various planetary roller extruder sizes the same width, so that the planetary spindles within different planetary roller extruder sizes in future are interchangeable. A planetary roller extruder with continuous planetary spindles can also be realized with split roll cylinders by the connecting ring in the inside diameter of the planetary roller extruder, having typical helical internal gearing.

0012The roller parts are designed in the outer region such that the external Access to the connecting ring is possible. This ensures that the connecting rings designed as a combination rings can be. It is thus possible to via the connecting rings to ensure degassing or a colorant addition.

0013In the drawing is schematically shown an example, it shows the Figure a planetary roller extruder with a plurality of rolling parts 1, which Connecting rings 9 are assembled. Each roll is part 1 of an outer segment 2 and an internally toothed roller cylinder 3. All three shown here, rolled parts 1 have a common Main spindle 4. In each roll part 1 are the main spindle 4 planetary spindles 5 arranged, shown here only in the central part of the roll. Each roller portion has a region 6, to which the connecting ring 9 comes to rest. This region 6 each roll part is over the axis of symmetry 7 symmetrically, wherein the symmetry axis 7 perpendicular is the extrusion direction. 8 It is thus possible, the roller part completely replace 1 or example, only the rolling cylinders 3 to change. The symmetric region 6 is the mounting position irrelevant, since the connection geometry to the connecting ring 9 in is any point identical. Thus, even the position, that is the situation a roll member variable in the extrusion direction. The first roller member for example, can be replaced by the third roller part because the connection dimensions are in the range 6 of the roll portion to match the End ring 11. In the connecting rings 9 pins 12 are arranged, which are used for example for degassing or the damming of the melt can. On the first roller part is an example of a heating element 10 arranged. Hereby it becomes possible, the temperature 13, referred to herein as Water cycle is shown to influence. It is for example conceivable to heat the roller part 1 by means of the heating element 10 and at too high a temperature by means of the water cycle occurrence 13, the roller part 1 to cool quickly to overheating Materials to avoid. Of course, it is also conceivable for the heating elements 10 to be attached to the other rolling parts. 1 The heating element 10 is also available via the connection elements shown with the machine control in connection, resulting in an exact temperature control is made possible.

0014The invention described and exemplified in the figure invention combines all the possibilities of a modern planetary roller extruder system. The planetary roller system is fully modular systems, the individual Roll members are rotatable and exchangeable and by means of the heating elements is an improved temperature control possible.

LIST OF REFERENCE NUMBERS

0015<dl tsize="2"><dt>1</dt><dd>rolling part</dd><dt>2</dt><dd>outer segment</dd><dt>3</dt><dd>rolling cylinders</dd><dt>4</dt><dd>main spindle</dd><dt>5</dt><dd>planetary spindle</dd><dt>6</dt><dd>symmetrical range of 1</dd><dt>7</dt><dd>axis of symmetry</dd><dt>8th</dt><dd>extrusion direction</dd><dt>9</dt><dd>connecting ring</dd><dt>10</dt><dd>tempering</dd><dt>11</dt><dd>end ring</dd><dt>12</dt><dd>pen</dd><dt>13</dt><dd>Cooling circuit</dd></dl>