referring to fig1 , the inventive muffle 10 comprises a pressing channel 12 , several connection channels 14 and several mold cavities 16 . three press blanks 18 are arranged side by side in the pressing channel 12 of the muffle 10 , said press blanks being pressurized with the aid of a press stamp 20 . as can be immediately seen from fig1 , the plurality of press blanks 18 arranged side by side , covers a large bottom surface 26 of the muffle 10 . in contrast to this , the inlet apertures 22 into the connection channels 14 are considerably smaller , for example by the factor 20 or 50 . thus , the press stamp 20 has to exert a high pressure on the press blanks 18 in the pressing channel 12 , in order to squeeze the molten blank material out of the press blanks 18 into the connection channels 14 and in order to overcome the resistance of the blank material to deformation . due to the narrow inlet , the connection channels 14 act so to speak as a barrier against an insufficient free - flowing blank material that possibly still comprises air bubbles . if the material due to its fluidity or low viscosity , respectively , has been well intermixed and air bubbles have been squeezed out of the molten blank material , the material ist so thin fluid that it enters the connection channels 14 . as a result , the molten blank material entering the mold cavities 16 , is more homogeneous so that less cracks form upon curing the ceramic dental restoration component . with the aid of a skillful arrangement of the connection channels 14 , the intermixing of the molten material from the blanks 18 can be further improved . effective results can already be achieved with a cross - sectional ratio between the connection channel 14 and the pressing channel 12 of approximately 1 : 100 ; the best results can be achieved with a cross - sectional ratio of approximately 1 : 2500 . fig2 shows measures how the turbulence of the blank material can be influenced by the inlet aperture 22 . a sudden transition between the pressing channel 12 and the connection channel 14 can be achieved with the aid of sharp edges 32 at the inlet aperture 22 , thus effecting a more intensive shearing stress or effect . alternatively , it is possible that the inlet aperture 22 has rounded edges 28 or chamfered edges 30 between the connection channel 14 and the pressing channel 12 . in this case , the inlet apertures of the individual connection channels 14 act as funnels that further compress the molten blank material . thus , it is intended to squeeze out air pockets in the material when it enters the connection channel 14 , if possible . fig3 shows a further exemplary embodiment of the inventive muffle 10 , however not to scale . features that have already been discussed with reference to fig1 , have the same reference numerals and are not discussed once again . the muffle 10 comprises a bottom area 40 and a wall 42 . the thickness of the bottom area 40 is selected such that it approximately amounts to 0 . 5 to 1 . 5 times the depth h 1 of the pressing channel 12 . the wall 42 of the muffle 10 is also embodied in such a manner that it has a thickness of 0 . 5 to 1 . 5 times the width of the pressing channel 12 . preferably , the thickness of the bottom area 40 is identical to the depth of the pressing channel . similarly , the thickness of the wall 42 corresponds to the width of the pressing channel 12 . in the present exemplary embodiment , the muffle 10 comprises a sloping edge 46 whose height ha corresponds to more than 10 % and preferably more than 20 % of the total height h of the muffle 10 , thus rendering the muffle 10 more flexible and enabling it to better absorb the stresses on the muffle material that result from pressing the press blanks 18 . as it is illustrated in fig4 , the pressing channel 12 of the muffle 10 in principle can be constructed to have oval shape such that two press blanks 18 can be received side by side . with a muffle of this kind , the pressing channel 12 is capable of taking or holding comparatively large amounts of blank material . nevertheless , the stroke required for processing the blank material to be pressed , is comparatively small such that the inventive muffle 10 can be used in a standard press oven without any problems . since according to fig4 the pressing channel 12 of the muffle 10 is concave and is formed without points of discontinuity , it has a comparatively small periphery . this offers little working surface for the press stamp 20 such that the friction between the press stamp 20 and the wall of the pressing channel 12 ist small , and the press stamp 20 can exert a comparatively high pressure on the molten blank material . in order to keep gaps 44 between the individual press blanks 18 as small as possible , press blanks 18 of various sizes can be used , as it is shown in fig5 . as a result , the processing time of the blank material in the muffle 10 is reduced and the quality of the dental restoration component to be produced is increased . the deformation of the press blank 18 by means of the press stamp 20 first leads to the filling of the gaps 44 between the press blanks 18 . these gaps 44 can have an extremely small volume if the press blanks 18 according to fig6 have a square cross - section , and if the pressing channel has a square construction , too . while a preferred form of this invention has been described above and shown in the accompanying drawings , it should be understood that applicant does not intend to be limited to the particular details described above and illustrated in the accompanying drawings , but intends to be limited only to the scope of the invention as defined by the following claims . in this regard , the term “ means for ” as used in the claims is intended to include not only the designs illustrated in the drawings of this application and the equivalent designs discussed in the text , but it is also intended to cover other equivalents now known to those skilled in the art , or those equivalents which may become known to those skilled in the art in the future .
the invention proposes a muffle with a pressing channel and at least one mold cavity that is coupled to the pressing channel via at least one connection channel . in this case , in order to increase the pressing pressure and to improve the intermixing of the blank material , it is proposed to arrange at least two blanks side by side in the pressing channel .