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OwnerMathias Kottinventor
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The invention relates to a bonded seam, a method, and a device for joining material webs (10) by means of a thermally activatable adhesive, in particular a hot-melt adhesive (11), wherein the material webs (10) are joined between impact elements (2, 4) along a bonded seam (12). According to the invention, an impact pulse is applied to the material webs or material sheets (10), arranged one above the other between a pair of unheated impact elements (2, 4), between which the adhesive (11) is located. The bonded seam (12) is formed by this impact pulse, wherein the impact pulse penetrates at least partially into the adhesive (11) and thereby activates the adhesive, wherein the activation is restricted to the region of the extension of the bonded seam (12), and wherein a height of the bonded seam (12) results which is less than the height of both material webs or material sheets (10), and wherein all of the liquefied adhesive (11) participates in the formation of the bonded seam (12) and the region of the liquefied adhesive (11) remains limited to the bonded seam (12). The invention also relates to the use of an impact press.
A bonded seam for joining material webs or material sheets (10) by means of a thermally activatable adhesive (11), characterized in that an impact pulse, in the form of a stroke movement of at least one of a pair of unheated impact elements (2, 4), acts perpendicularly on the material webs or material sheets (10) arranged one above the other, between which the adhesive (11) is located, wherein the penetration time of at least one of the impact elements (2, 4) into the material webs or material sheets (10) is less than 10 ms, wherein the bonded seam (12) is formed by the impact pulse penetrating at least partially into the adhesive (11) and thermally activating the adhesive (11), wherein the thermal activation is limited to the area of the bonded seam (12), wherein the resulting height of the bonded seam (12) is less than the height of both material webs or material sheets (10), and wherein all liquefied adhesive (11) participates in the formation of the bonded seam (12), and the area of the liquefied adhesive (11) remains limited to the bonded seam (12).
A method for joining material webs or material sheets (10) by means of a thermally activatable adhesive (11), the material webs or material sheets (10) being joined along a bonded seam (12), characterized in that an impact pulse, as a stroke movement of at least one of a pair of unheated impact elements (2, 4) arranged one above the other, acts perpendicularly on the material webs or material sheets (10), with a penetration time of at least one of the impact elements (2, 4) into the material webs or material sheets (10) and the adhesive (11) being less than 10 ms, by which the adhesive (11) is activated and the bonded seam (12) is formed, followed by the return stroke of at least one of the impact elements (2, 4).
A device for joining material webs or material sheets (10) by means of a thermally activatable adhesive (11) along a bonded seam (12),
(canceled)
Dependencies are inferred from the claim text.