DD153771A1 - DEVICE FOR FIXING PRESSING PLATES I PLATE MATERIAL PRESSES - Google Patents

Abstract

The invention relates to an attachment of press plates or Praegematrizen of ferritic stainless steels or other magnetic materials to hotplates of presses, as they are used in particular for the surface formation and refinement of plates in the wood, paper, plastics processing and rubber industry. The aim of the invention is to achieve by a significant reduction of the material stresses in the surface forming or finishing elements to extend the life and maintain the quality of the products made with them over a longer period. The object of the invention is to achieve this goal by dispensing with the previously known tensioning devices and by the complete elimination of even with the use of tensioning devices of the usual kind still existing hanging of said elements. According to the invention, the objective is achieved by the incorporation of permanent magnetic and / or electromagnetic adhesive elements in the underside of the upper heating plate or the press die of suitable presses. The adhesive elements are preferably concentrated in the region of the maximum deflection of the press plate. Their magnetic flux is predominantly directed to the press plate. The device is also suitable for holding deformed press plates, provided that their use is advantageous.

Description

Description of the invention

Title of the invention

Device for fastening press plates in plate material press,

Field of application of the invention

The invention relates to a device for fastening press plates made of ferritic stainless steels to the hot plates of various, the surface formation or »finishing serving presses, as they are preferably for the production of particleboard and fiberboard and other sheet products of the wood industry but also the paper and The rubber industry, as well as plastics processing, including the smoothing, embossing or structuring of products, find use

- Characteristics of the known technical solutions

It is known that in the presses of the wood industry, pulp, paper and Guromi industry to obtain high-quality "Oberflächeagualitätea with respect to particular smoothness or texture effects, vorgewieseweiae at the top of the machined 'Werkstücke odex * materials, press plates of the desired ⁱ surface quality used according ^wex% DEA had η φ it is also known that these press plates .from different materials such as aluminum of different degrees of hardness, hard chrome plating, brass with 3owie

Stainless steels are used both in the form of ferritic microstructures and other magnetic materials

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While it is known and is also handled in the company practice that aluminum sheets are used at a greater thickness than other materials only a sheet metal suspension without., Or with only low clamping effect, press plates made of other materials due to their smaller thickness and rigidity and their higher Mass .. due to the unavoidable press-sheet slack with span in the? ichtuagea provided, The Oberblechspanneinrichtungen.Aiggestaltster design bring as. Significant disadvantage to the already existing voltages from constantly. Changing thermal expansion u? ad the specific pressing pressures through the material to be pressed, in addition to considerable stresses in the press plates into it, without thereby completely avoid a detrimental slack z \ i can ₀

Especially in the wood industry, it comes through, the resulting air in the Pressgutwechsel to Staubab * ». deposits in the sinks of the upper sheets which can develop in the course of a relatively short time - to harmful cakes of considerable thickness _- which must be considered as a further considerable fraction.11 * ^L

Another known solution provides that the upper:. Preßbleche .fertigungstechnisch ¹ .eine, .einseitige-Vor .- .. ^; get tension so as to substantially reduce the slack »...- -..-. .... ·.-....: -.: ..:.: ...:. .....: ..: ... ^:

These sheets have the disadvantage that they can not be turned over easily and, on the other hand, the tensioning effect due to the constant change in temperature is rapidly acheived.

Internationally, it is customary to treat damaged or, otherwise worn out, press plates by Naohschleifeo., To regeae- rierea, to associate with them. occurring Blechdickenverrißgerungen and not completely to be '~

seitigeadea Materi-alermüduü-gserscheiaungea have the part of the stream to make ¹ regenerated sheet unusable in ever shorter times «·

'· Goal of BrfinduQg ....;., ... ^;

The aim of the invention is to remedy the shortage of the state of the art with comparatively little technical effort. With the invention, a substantial increase in service life of the press plates fastened to heating plates is to be achieved by omitting mechanical spaoa devices on the press plate edge, nevertheless a mass-dependent and stability-influencing effect.

almost completely eliminated, and thus the danger of harmful discharges of dust particles between sheets and press plates is effectively counteracted _e

, Furthermore, a cost reduction should be achieved, which results from the following FaJktorea kanas ..: ..-.

«• Reduction of the use of materials of high-grade steels through the possibility of using thinner sheets _{i (}

- possibility eiüer yet multiple Eegenerieruag no longer usable ges by natural wear press plates to the limit of iü.den Herstellerbe · »r exaggerated potential Dickeabearbeituag with this Incoming put Y / erkzeugmaschinea _s. , · ''

- · Significant reduction of dismantling and downtimes:. by, simpler attachment or * bracket of the press plates /

»Verx'ing the yield loss by increasing the quality of the finished products bzv / V. the quality that can be garatted over a longer period of time »

Presentation of the essence of Brfinduag

Task .aez invention is it, -, doa in several ways ^: harmful Preßblechdixrc & slope opposite the Heizplatiren «

Bottom with the application of ferritic stainless steels or other magnetic materials through the insert '. ρ dimension magnet is more likely and / or electromagnetic adhesive elements when used simultaneously or without the use of additional simplest suspension devices of a type known per se _. ate the edges of the press plates to be worn or opened. to reduce the maximum values due to the slightest bending undulations *

The adhesive magnetic or electromagnetic adhesive elements should be designed so that their maximum magnetic holding force is oriented in the direction of the press plates . , .., ..,. - ..., ...;.:. ...: .....:

Next, it is an object of the invention? to get along with the least possible number of adhesive elements to the strength of these elements the mass of the press plate ßichtf or not substantially exceed, Brfiadungsgemäß this requirement is met by: ·· the arrangement-the Haft el an ate is made so _s that at 11o the positions of the greatest deflection of a flat, rectangular plate of uniform thickness held on the bands, the majority of the elements is placed "- ^; The adhesive element © körmea also in the .Herstellung three -... dimensional verfor-mth hz \ v ^_e: find oberflächenveredelter.Preßkörper using ₉ provided press plates as inserts of "advantage are _e - ·..

Furthermore, it is possible stamping die * ^ which preferably consist of laminate and a direct, '- transferring the respective Origiaal ^ Holzstrulctur made-12o to stick handy _$ with unalloyed steel sheet and ebeßfalls to fixing in the press by Haftelemeate

embodiment

The invention will be explained in more detail aa embodiment, v / er the _e

" ⁵ " 224 Oll

Show it: '..._

1 shows a cross section through a part of the heating plate with embedded adhesive element.

2 shows the underside of a heating plate with arrangement of the adhesive elements.

13o In a hot plate or a ram 1 with or without drilled heating channels or heating elements 2 are particularly oriented in their adhesion permanentmag-. netic adhesive elements 3 used in a suitable manner, which can be applied directly to die.Heizplatte or to the ram the respective ferrite chrome steel sheet or made of other magnetic materials Preßstempel · To secure the position and suspension on the ^: edges can be known per se, simple, not here suspension elements shown are used. :, ^:

The arrangement of the permanent magnetic and / or electromagnetic adhesive elements over the plate is preferably concentrated in the region 5 of the maximum deflection of a flat, rectangular plate of the same thickness placed on the edges

Claims (5)

invention claim 1e device for .Festigung of press plates made of ferritic stainless steel, which may be flat or deformed, on Heiaplatten or Stempelia of presses, which serve the surface formation or refinement of flat or even, three-dimensionally deformed materials, characterized in that in the underside of a Upper press plate (1) or a press die Adhesive elements (3) are a gelassea _o ' 2 * device üaoh point 1, characterized in that the adhesive elements have a predominantly on the Preßbleoh (4) directed magnetic flux 3 · ¹ . Device according to item 1 and 2, characterized in that the adhesive elements are permanent magnetic or / and electromagnetically designed «   4-e device according to the points 1 to 3, characterized in that the Haftelemeate are preferably concentrated in the region of the maximum deflection of the press plate. 5 »Device after the points. 1 to 4 characterized.-characterized in that when using non-ferric matrices for the production of surface structures, these structures are made adhesive by bonding with ferritischoa press plates _e