Method and device for processing a teat rubber during production
OwnerWilfried Hatzack, Jakob Maierinventors
Life of this patent
Estimating the term…
Abstract
During the production of teat rubbers, in particular of teat rubbers containing a high percentage of silicone, pressure is applied when the teat rubber preforms are removed, the radial expansion of teat rubber areas being appropriately limited to a maximum value. Hence, the removal can be executed automatically and at a comparatively high temperature without irreversible damage being caused to the material. The removal process can be supported by an appropriate contact surface whose contour corresponds, at least partially, to the outer contour of the preform. Furthermore, an appropriate removal device is provided.
Claims22
Device for removing a preform of a teat rubber which has a head region with a contour and a tube region and is applied at least partially to an element determining the inner shape of the teat rubber, said device comprising:
- a removal unit with a shaped contact face adapted to the contour of the head region which is to be brought at least partially into contact with the head region of the preform,
- a fluid introduction means which is embodied for introducing a pressurized fluid into the tube region, and
- limiting means for limiting the radial expansion of the tube region on introduction of the fluid, wherein the shaped contact face is modelled on the contour of the preform and in that a traction mechanism is provided for exerting a tensile force on the preform via the shaped contact face in the direction of the longitudinal axis of the preform.
Device for removing a preform of a teat rubber which has a head region and a tube region and is applied at least partially to an element determining the inner shape of the teat rubber, said device comprising:
- a removal unit with a contact face which is to be brought at least partially into contact with the preform,
- a fluid introduction means which is embodied for introducing a pressurized fluid into the tube region, and
- limiting means for limiting the radial expansion of the tube region on introduction of the fluid, wherein the contact face is modelled on the contour of the preform and in that a traction mechanism is provided for exerting a tensile force on the preform via the contact face in the direction of the longitudinal axis of the preform,
- wherein the limiting means has a sleeve which at least partially surrounds the tube region to define a gap between the exterior and an inner face of the sleeve for limiting the radial expansion, and
- wherein the sleeve has gas outlets which substantially prevent the production of gas pockets between the inner face of the sleeve and material of the tube region during the radial expansion.
A device for removing a preform of a teat rubber having a head region with a shape and a tube region from a mold having a longitudinal axis comprising:
- a sleeve placed around the tube region forming a radial gap between said sleeve and the tube region limiting radial expansion of the preform;
- a fluid supply adjacent the tube region, wherein pressurized fluid is applied to an interior of the tube region radially expanding the preform away from the mold;
- and
- a removal unit having a shaped contact surface conforming to the shape of the head region and movable along the longitudinal axis,
- whereby the shaped contact surface conforming to the shape of the head region assists in removing the preform from the mold without deforming or damaging the preform when said removal unit is moved along the longitudinal axis.
Dependencies are inferred from the claim text.