EP3489017A1 - Universal adapter having a clamping part for connecting templates of different tensioning systems with the same tensioning frame - Google Patents

Abstract

Universal adapter for connecting templates (110; 110A; 110B) of different clamping systems with the same clamping frame (150) with a strip-shaped adapter body (122) with an essentially rectangular cross-section, which has a recess (124) on its underside for receiving the clamping device of the clamping frame , and with different clamping inserts (114; 114A) which are adapted to different clamping systems and wherein the upper side of the adapter body (122) comprises a further recess (128) for receiving these clamping inserts (114; 114A) adapted to the different clamping systems, the template ( 110; 110A; 110B), adapter body (122) and clamping insert (114; 114A) are held together by a clamping part (112), and the clamping part (112) is designed as an elongated strip in one piece with the adapter body (122), with which it is connected a cross-sectionally U-shaped web (131) is connected.

Description

I. Field of application

The present invention relates to a universal adapter for connecting templates of different clamping systems with the same clamping frame.

II. Technical background

The present invention is particularly applicable to screen printing apparatus for making printed circuits. Here, inter alia, quick-clamping templates are used, by means of which in the screen printing paste, in particular solder paste, are applied to circuit carriers. For this purpose, the stencils, before they can be inserted into the screen printing machine, must be mounted in a, for the hole edge corresponding Schnellspannrahmen. For such SMD quick-clamping templates, there are various recording systems on the market, the respective template fits only in this associated recording system. These differ in that different apertures (round, oval, rectangular or oblong-rectangular) of different sizes are used for clamping the stencils on the template outer edges. As a result, the template can only be used with the corresponding clamping frame of the respective manufacturer. It is thus not possible to clamp stencils of different types on a standard tenter. The clamping frames are then again placed on the respective printing press, so that the user of a corresponding printing machine clamping frame system is forced to always use the same templates of its own manufacturer. Of course, this is logistically very complex and tedious.

III. Presentation of the invention a) Technical task

It is therefore the object of the present invention to provide an adapter for receiving existing quick-clamping templates from different manufacturers in one and the same fixed frame available. The problem here is that the existing quick-release templates of different manufacturers have different perforation geometries, as stated above. For the embodiment of the present invention, the VectorGuard fixed frame has been exemplified as the frame, as it is the most widely used in the world. However, the invention can also be used with all other fixed frame systems if the geometry is adapted accordingly. According to the invention, therefore, a universal adapter is to be created which can accommodate different perforation geometries of quick-action templates of different manufacturers in one and the same fixed frame and allow it to be clamped therein.

The universal adapter according to the invention is intended in particular to be able to accommodate at least four different perforation geometries from different manufacturers, which enable the inclusion of these existing SMD stencils, preferably in a VektorGuard fixed frame, which clamp the SMD stencils as evenly as possible, can be used several times, which comprise corners of the SMD stencils be retrofitted on-site in existing printing presses and be produced as inexpensively as possible.

b) Solution of the task

According to the invention this object is achieved by a universal adapter comprising a strip-shaped adapter body having a substantially rectangular cross-section having on its underside a recess for receiving the clamping device of the clamping frame, while its upper side another recess for receiving various clamping inserts and its outer side a third recess for receiving the edge of a suitable clamping part, wherein the clamping part is provided as an elongated rail with a flat-rectangular cross section and on its underside adapted to the respective clamping systems projections.

In certain types of stencils, it is preferred to provide a clamping insert which is also formed as an elongated rail with a flat-rectangular cross-section, and on its upper side one or more longitudinal slots for receiving the projections of the clamping part.

Preferably, the clamping part is made of thermosetting plastic.

To adapt to the currently known stencil systems, the present invention provides various clamping parts with projections in the form of round, oval or square pins of different diameters or in the form of elongated, rectangular strips. Depending on any template systems that may appear on the market in the future, further geometries of the protrusions may be used in future.

For better adaptation to the VektorGuard fixed frame used in the exemplary embodiment, the adapter body is preferably provided with a chamfer on its inner lower edge.

According to an advantageous embodiment of the present invention, the universal adapter is further developed so that it can be produced by inexpensive mass production and still with the required dimensional stability by again a strip-shaped adapter body is provided with a substantially rectangular cross-section, on its underside a recess for receiving the clamping device of the clamping frame, while its upper side comprises a further recess for receiving different, adapted to the different clamping systems clamping inserts, wherein template, adapter body and clamping insert are held together by a clamping part.

In this case, the clamping part is preferably formed as an elongate strip integral with the adapter body, with which it is connected via a cross-sectionally U-shaped web.

To ensure sufficient stability and dimensional stability of the universal adapter, the glue pads are preferably made as elongated strips of stainless steel, in which tongues are punched, the shape of which is adapted to the recesses of the templates of the various clamping systems.

For mass production, it is particularly preferred if the adapter body is made of an aluminum profile. In this way, a cheap mass production can be realized.

It is particularly preferred if the U-shaped web is provided in the arc of the U with a groove extending in the longitudinal direction. In this way, either the elasticity of the clamping member can be improved, but on the other hand, the groove can also be designed so that a multiple use of the same universal adapter system is not possible, since in a re-bending of the clamping member this then breaks off.

The groove is in this case preferably arranged on the inside of the U.

The recess for receiving the clamping device of the clamping frame preferably has the shape of an elongated rectangle whose short sides are formed as semicircular arcs.

In order to form a suitable clamping frame, four adapter bodies are preferably connected by corner elements.

The corner elements are preferably provided with tongues whose shape is adapted to the shape of the recesses, that engage in the recesses fit.

It is particularly preferred if the corner elements are provided with snap-on lid, which engage over the corners of the template.

These corner elements are preferably made of plastic.

c) embodiments

Fig. 1:

Eine dreidimensionale Schnittdarstellung eines VektorGuardRahmenprofils mit einem erfindungsgemäßen Adapter für die Becktronic-100-Schablone "BEC100";

Fig. 2:

Eine Detaildarstellung des Zusammenwirkens von Klemmteil, Klemmeinlage und Schablone der Figur 1;

Fig. 3:

Das Zusammenwirken von Klemmteil und Klemmeinlage für eine Quattroflex-Schablone;

Fig. 4:

Die Gestaltung des Klemmteils für eine MicroMount- oder Alpha-Tetra-Schablone (hier ist keine Klemmeinlage erforderlich).

Fig. 5

eine Schnittdarstellung eines erfindungsgemäßen Universaladapters mit einer QuattroFlex-Schablone mit Bördelkante;

Fig. 6

eine Schnittdarstellung des erfindungsgemäßen Universaladapters mit einer Becktronic-BEC100-Schablone mit Bördelkante;

Fig. 7.

eine Schnittdarstellung eines erfindungsgemäßen Universaladapters mit einer MicroMount-Schablone mit Bördelkante;

Fig. 8

eine erfindungsgemäße Klemmeinlage für die Becktronic-BEC100- und MicroMount-Schablonensysteme in Draufsicht;

Fig. 9

eine erfindungsgemäße Klemmeinlage für QuattroFlex-Schablonen;

Fig. 10

den Schnitt A - A der Fig. 9;

Fig. 11

den Schnitt A - A der Fig. 8;

Fig. 12

ein erfindungsgemäßes Eckelement in Draufsicht;

Fig. 13

den Schnitt A - A der Fig. 12;

Fig. 14

das Eckelement der Figur 12 von der Seite;

Fig. 15

das Eckelement der Fig. 12 von hinten/unten;

Fig. 16

den Zusammenbau aus dem Eckelement der Fig. 12 mit einem entsprechenden Deckel; und

Fig. 17

den Schnitt A - A der Figur 16.

The present invention is explained in more detail below with reference to the embodiment shown in the drawings:
It shows:

Fig. 1:

A three-dimensional sectional view of a VektorGuard frame profile with an adapter according to the invention for the Becktronic 100 template "BEC100";

Fig. 2:

A detailed representation of the interaction of the clamping part, clamping insert and template of FIG. 1 ;

3:

The interaction of clamping part and clamping insert for a Quattroflex stencil;

4:

The design of the clamp for a MicroMount or Alpha Tetra template (no clamp insert required here).

Fig. 5

a sectional view of a universal adapter according to the invention with a QuattroFlex template with flanged edge;

Fig. 6

a sectional view of the universal adapter according to the invention with a Becktronic BEC100 template with flanged edge;

Fig. 7.

a sectional view of a universal adapter according to the invention with a MicroMount template with flanged edge;

Fig. 8

a clamping insert according to the invention for the Becktronic BEC100 and MicroMount stencil systems in plan view;

Fig. 9

a clamping insert according to the invention for QuattroFlex stencils;

Fig. 10

the section A - A of Fig. 9 ;

Fig. 11

the section A - A of Fig. 8 ;

Fig. 12

an inventive corner element in plan view;

Fig. 13

the section A - A of Fig. 12 ;

Fig. 14

the corner element of FIG. 12 of the page;

Fig. 15

the corner element of Fig. 12 from behind / below;

Fig. 16

the assembly of the corner element of Fig. 12 with a corresponding lid; and

Fig. 17

the section A - A of FIG. 16 ,

FIG. 1 shows a universal adapter according to the invention for connecting a template of Becktronic BEC100 clamping system with a clamping frame of the type "VektorGuard". The template 10 has at its outer edge a parallel to the edge extending row of rectangular, preferably square openings, which encloses a closely spaced therefrom extending inner row of circular openings. Accordingly, the template 10 is received between a clamping member 12 and a clamping insert 14 such that the clamping member 12 has corresponding projections 16 which extend downwardly through the template 10 into the clamping insert 14. In order for the projections 16 to find room there, the clamping insert 14 is provided on its upper side with two longitudinal groove-like recesses 17. The clamping part 12 is arranged above the template 10, while the clamping insert 14 is arranged underneath. The clamping part 12 is advantageously made of duroplastic, has the shape of an elongated rail or strip with a flat-rectangular cross-section and surrounds the template 10 outside with a "C" -shaped by 180 ° down and inwardly bent edge 18th

The clamping member 12 may be composed of several clamping member segments, which are interconnected by self-retaining tongue and groove elements.
In order to receive the clamping insert 14 and to hold the clamping part 12 and to establish the connection to the clamping frame 20, an adapter body 22 is provided. This is also rail or strip-shaped with a substantially rectangular cross-section. He has on its underside a recess 24 for receiving a clamping device 26 of the clamping frame 20. Next, it has on its outer side an outer recess 27 for receiving the edge 18 of the clamping part 12. Further, the adapter body 22 is provided on its upper side with a further recess 28 for receiving a clamping insert (for example 14) and / or the projections 16 of the clamping part 12. Finally, the adapter body may be provided with a chamfer 30 at its inner lower edge.

The design of the clamping frame 20 with the clamping device 26 corresponds to the usual design of a VektorGuard clamping frame and is therefore not explained in detail.

• Figur 2 stellt die auch in Figur 1 dargestellte Anpassung einer Becktronic-BEC100-Schablone auf den hier als Rahmenmuster dienenden VektorGuard-Spannrahmen nochmals in einer Explosionszeichnung dar. Figur 2 zeigt nochmals detailliert, wie das Klemmteil 18 für die Becktronic-Schablone 10 in diese eingesetzt ist und sodann der Klemmteil 14 aufgesetzt wird. Diese Kombination kann sodann mittels des Adapterkörpers 22 in den normalen VektorGuard-Spannrahmen 20 eingesetzt und mit der dortigen Spannvorrichtung 26 gespannt werden.
• Figur 3 zeigt die Umrüstung des erfindungsgemäßen Universaladapters für eine Quattroflex-Schablone 10A. Hierfür dient ein entsprechend angepasster Klemmteil 12A mit einer entsprechend angepassten Klemmeinlage 14A. Hier ist entsprechend der Ausbildung der Quattroflex-Schablone mit nur einer Reihe ovaler Öffnungen am Rand lediglich eine Reihe Vorsprünge 16A in Form von wesentlich dickeren runden Stiften vorgesehen. Entsprechend weist die Klemmeinlage 14A hier auch nur eine Ausnehmung 17A auf. Diese ist dafür breiter als in der Ausführungsform gemäß Figur 2.
• Figur 4 schließlich zeigt das Klemmteil 12B, wie es erfindungsgemäß zum spannen einer MicroMount-Schablone 10B oder einer Alpha-Tetra-Schablone vorgesehen ist. Da die MicroMount- oder Alpha-Tetra-Schablonen an ihrem Rand eine Reihe länglicher rechteckiger Schlitze zum spannen aufweisen, sind hier entsprechende Vorsprünge 16B in Form von länglich rechteckigen Streifen an dem Klemmteil 12B angebracht. Da diese bereits selbst die weitere Ausnehmung 28 selbstständig ausfüllen, bedarf es hier keiner Klemmeinlage.

The FIGS. 2, 3 and 4 each show different adaptations of the universal adapter according to the invention to different stencil systems:

• FIG. 2 also puts in FIG. 1 illustrated adaptation of a Becktronic BEC100 template on the here serving as a frame pattern VektorGuard tenter again in an exploded view. FIG. 2 shows again in detail how the clamping part 18 is inserted for the Becktronic template 10 in this and then the clamping part 14 is placed. This combination can then be inserted by means of the adapter body 22 in the normal VektorGuard clamping frame 20 and clamped with the clamping device 26 there.
• FIG. 3 shows the conversion of the universal adapter according to the invention for a Quattroflex stencil 10A. For this purpose, a correspondingly adapted clamping part 12A with a correspondingly adapted clamping insert 14A serves. Here, according to the design of the Quattroflex template with only a series of oval openings on the edge only a series of projections 16 A is provided in the form of much thicker round pins. Accordingly, the clamping insert 14A here also has only one recess 17A. This is wider than in the embodiment according to FIG. 2 ,
• FIG. 4 Finally, the clamping part 12B shows how it is provided according to the invention for tensioning a MicroMount template 10B or an Alpha-Tetra template. Since the MicroMount or Alpha-Tetra templates have at their edge a series of elongated rectangular slots for clamping, corresponding projections 16B in the form of oblong rectangular strips are here attached to the clamping part 12B. This one Even self-fill the additional recess 28, it requires no clamping insert here.

When looking at the FIGS. 2, 3, and 4 It is noticeable that the edge 18 bent downwardly and inwardly on the outside "C" in a shape of 180 ° in each case has the same design, since it must cooperate with the adapter body 22, which is also the same, in order to form the respective templates in the VektorGuard frame 20 to be able to tension.

Thus, according to the present invention, not only a VektorGuard template can be stretched with a VektorGuard frame (this, of course, still works without adapters), but Becktronic templates of the type BEC100 as well as templates of the types Quattroflex, Alpha-Tetra and MicroMount be tense. By appropriate adaptation of the clamping part 12 and optionally the clamping insert 14, the present invention can also be adapted for any other (possibly not yet known on the market) templates.

Fig. 5 shows a further universal adapter according to the invention, which is particularly suitable for mass production in which a template 110A of the system QuattroFlex is stretched in the universal adapter according to the invention. In the same way stencils of the systems "Tensoframe" or "Stencilman" can be stretched. In the illustration, the squeegee side is up, the template is provided with a flanged edge 100A. The universal adapter according to the invention is shown here cut vertically. This clearly shows that it comprises an adapter body 122 with a substantially rectangular cross-section, which has on its underside a recess 124 for receiving the clamping device of a printing press, not shown here. The recess 124 extends in the longitudinal direction of the adapter body 122 and has the shape of a flat rectangle whose narrow sides are dovetail-shaped. On the lower outer side, the adapter body 122 has a bevel 125.

On the lower inner side of the adapter body 122 is provided with a corresponding cutout 127 which serves to adapt to the printing press. The top of the adapter body 122 is flat and smooth and has approximately in the middle of a flat-rectangular recess 128, which for receiving various clamping inserts 114; 114A can serve. Outside this recess 128, a deeper recess 129 is provided here, which can accommodate a flanged edge 100A of the template 110A. Formed on the upper outer edge of the adapter body 122 by a continuous U-shaped web 131 is a clamping part 112 which extends inwards above the adapter body 122 and in its downwardly bent state (as shown) the template 110A and the clamping insert 114A in FIG holds her position. For this purpose, the clamping part 112 has an inner thickened end 133 with a flat underside and a beveled inner upper edge. In the region of the U-shaped web 131, a groove 135 extending parallel to the longitudinal direction of the adapter body 122 may be provided. This is arranged here on the inside in the bottom of the U. This groove can be used on the one hand to increase the elasticity of the web 131, on the other hand, but also as a predetermined breaking point, if a multiple use of the universal adapter should be excluded.

Fig. 6 shows the universal adapter according to the invention in conjunction with a template 110 of the Becktronic BEC100 clamping system. According to the invention, the same adapter body 122 already described above can be used. From a new description of the adapter body 122 is therefore omitted here. For use with the Becktronic BEC 100 template 110, only one other clamping insert 114 must be used here. The description of the detailed embodiment of the various clamping inserts 114; 114A is below with respect to FIGS. 8 to 11 ,

Fig. 7 shows how a template 110B of the MicroMount system or a similar template of the Alpha-Tetra bonding system can be clamped with the universal adapter according to the invention. Advantageously, here not only the same adapter body 122, but also the same clamping insert 114 as in Fig. 6 be used for a Becktronic template. The only difference here is that part of the clamping holes 111B formed in the MicroMount or Alpha Tetra stencils as elongated slots remain visible in the template 110B as openings outside. This does not bother us, however.

Fig. 8 shows the clamping insert 114 according to the invention for Becktronic, MicroMount or Alpha-Tetra templates 110; 110B. These templates have rectangular clamping openings. Accordingly, narrow rectangular tongues 141 are punched out in the clamping insert 114 and project upwards. As in Fig. 8 As can be seen, the punched-out tongues 141 do not extend over the entire length of the clamping insert 114. Rather, the edge regions, in which the templates are not provided with recesses, are also not provided with corresponding tongues 141.

In the Fig. 8 holes 143 shown are manufacturing-related, and may be omitted.

Fig. 9 shows a clamping insert 114A, with which the universal adapter according to the invention can be adapted to QuattroFlex templates 110A. Since these QuattroFlex templates have oval or circular clamping holes, the punched-out tongues 141A here are punched out substantially larger and semicircular, with the punched-out portions each drawn inwards a small distance after the semicircle has been completed in order to allow the tongues 141A to stand up sufficiently far , Again, the tongues 141 A are not guided to the extreme ends of the clamping insert 114 A, but already stop a piece before, as well as the corresponding Stencils are not provided with corresponding openings up to the edge.

Here, too, there are further holes 143A which, however, are also production-related, and according to the invention can also be omitted.

Fig. 10 shows the section A - A of Fig. 9 , Here it is very clear how the tongues 141A are punched out, and how they then stand up to engage in the corresponding holes in the template 110A. It should be noted that the tongues are slightly higher than the thickness of the clamping insert 114A.

Fig. 11 shows the section A - A of Fig. 8 Here, too, the section is guided by the corresponding tongue 141, so that it is also nicely recognizable here how the respective tongues project upwards by slightly less than the thickness of the clamping insert 114.

The FIGS. 12 to 16 show the construction of the corner elements 150, with which four adapter bodies 122 according to the invention can be connected to form a tenter.

Fig. 12 shows a corresponding corner element 150 from above. Preferably, the corner element 150 has the same cross-section as the adapter body 122. In this case, it comprises two straight connecting pieces, which are connected by a quarter-circle arc. The connection with the two adjoining adapter bodies 122 takes place via tongues 152 whose cross-section is chosen so that they fit exactly into the recesses 124 of the adapter body 122 for receiving the tensioning devices. Next, the corner elements recesses 154 for receiving the different protruding ends of the clamping inserts 114, 114A. The two differently long recesses 154 and 156 serve to lock the two different clamping inserts 114 and 114A. Next point the corner elements 150 receiving openings 158 for snap fasteners, with the aid of a corresponding cover 160 can be placed on the corner members 150 (see below).

Fig. 13 shows the enlarged section A - A of Fig. 12 , Here are the images 158 including the associated undercuts, which are visible here as widening levels at the top, clearly visible. At these undercuts of the passage openings 158 corresponding locking elements of lids 160 for the corner elements 150 can lock.

Fig. 14 shows the corner element 150 of Fig. 12 of the page. Particularly clear is the cross-sectional shape of the tongue 152 adapted to the cross section of the recess 124 of the adapter body 122.

Fig. 15 shows the corner element 150 of Fig. 12 from the back. Clearly visible are the passage openings 158 for the locking elements of a lid 160 and the associated undercuts.

Fig. 16 shows the corner element 150 of Fig. 12 with attached lid 160. The lid 160 serves for additional attachment and stabilization of the template and the clamping inserts. The two-part corner construction was chosen only for manufacturing reasons (Kunststoffgießprobleme). "Without cover" would disassemble the entire construct of the corner joint.

Fig. 17 shows the section A - A of Fig. 16 , It is easy to see how the latching elements 162 of the cover 160 engage here in the openings 158 and lock on the widened steps.

The universal adapter according to the invention is composed of four strip-shaped adapter bodies 122, four clamping inserts 114 or 114A, depending on the respective clamping system of the stencil to be clamped, and four corner elements 150 including the associated lid 160 constructed. The following steps are recommended:
The template 110 to be adapted; 110A or 110B is covered on one of its sides with a clip liner 114 or 114A (depending on the type of template) so that the tongues 141 or 141A fit into the corresponding openings of the template 110; 110A or 110B intervene.

Subsequently, a strip-shaped adapter body 122 is pushed onto this combination.

At the end of a corner element 150 is attached.

These steps are repeated for all four sides of the stencil to be adapted. In the last corner element, a special design is required, in which one of the tongues in the manner of a bolt in the longitudinal direction of the adapter body 122 is slidably inserted into the corner element. This pluggable and removable tongue is now completely inserted into the last adapter body first, then the corner element is inserted with the fixed tongue in the other adapter body. Now, the movable tongue is pushed back so far from the adapter body 122 in the corner element until a final anchoring is done.

Now, the corner elements 150 can still be completed by snapping appropriate cover 1 60.

In this way, a universal adapter according to the invention can be constructed with little work and of very simple components without much effort. With a single type of adapter body and corner elements with a lid and only two strip-shaped clamping inserts, templates from the QuattroFlex, BEC-100, MicroMount, Stencilman, Tensoframe and Alpha-Tetra systems can be adapted to a single clamping device.

Claims (9)

Universal adapter for connecting templates (110, 110A, 110B) of different clamping systems with the same clamping frame with a strip-shaped adapter body (122) having a substantially rectangular cross section, which has on its underside a recess (124) for receiving the clamping device of the clamping frame, and with various clamping inserts (114; 114A) adapted to different clamping systems and wherein the upper side of the adapter body (122) comprises a further recess (128) for receiving these clamping inserts (114; 114A) adapted to the different clamping systems,
characterized in that
Template (110, 110A, 110B), adapter body (122) and clamping insert (114, 114A) by a clamping part (112) are held together, and the clamping part (112) is formed as an elongated strip integral with the adapter body (122) with the it is connected via a cross-sectionally U-shaped web (131). Universal adapter according to claim 1, characterized in that
the clamping inserts (114; 114A) are made as elongated strips of stainless steel from which tongues (141; 141A) are stamped, the shape of which is adapted to the recesses of the templates (110; 110A; 110B) of the various clamping systems. Universal adapter according to claim 1 or 2, characterized in that the adapter body (122) is made of an aluminum profile. Universal adapter according to claim 1, 2 or 3, characterized in that the U-shaped web (131) is provided in the arc of the U with a longitudinally extending groove (135). Universal adapter according to claim 4, characterized in that
the groove (135) is arranged on the inside of the U. Universal adapter according to one of claims 1 to 5, characterized in that
the recess (124) has the shape of an elongate rectangle whose short sides are dovetail-shaped. Universal adapter according to one of claims 1 to 6, characterized in that
four adapter bodies (122) are connected by corner elements (150), thus forming a tenter frame. Universal adapter according to claim 7, characterized in that
the corner elements (150) are provided with tongues (152) whose form is adapted to the shape of the recesses (124) in such a way that they fit precisely into the recesses (124). Universal adapter according to claim 7 or 8, characterized in that
the corner elements (150) are provided with snap-on lids (160) which engage over the corners of the template (110; 110A; 110B).

Images