NL2014455B1 - Punching device for manufacturing pads. - Google Patents

Punching device for manufacturing pads. Download PDF

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Publication number
NL2014455B1
NL2014455B1 NL2014455A NL2014455A NL2014455B1 NL 2014455 B1 NL2014455 B1 NL 2014455B1 NL 2014455 A NL2014455 A NL 2014455A NL 2014455 A NL2014455 A NL 2014455A NL 2014455 B1 NL2014455 B1 NL 2014455B1
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NL
Netherlands
Prior art keywords
punching
heating
heating element
punching device
punch
Prior art date
Application number
NL2014455A
Other languages
Dutch (nl)
Inventor
De Gooijer Gerrit
Original Assignee
Vmi Holland Bv
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vmi Holland Bv filed Critical Vmi Holland Bv
Priority to NL2014455A priority Critical patent/NL2014455B1/en
Priority to PCT/NL2016/050005 priority patent/WO2016148564A1/en
Application granted granted Critical
Publication of NL2014455B1 publication Critical patent/NL2014455B1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/27—Means for performing other operations combined with cutting
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
    • A61K8/0208—Tissues; Wipes; Patches
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/08—Means for treating work or cutting member to facilitate cutting
    • B26D7/10—Means for treating work or cutting member to facilitate cutting by heating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/3846—Cutting-out; Stamping-out cutting out discs or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/40—Cutting-out; Stamping-out using a press, e.g. of the ram type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/44—Cutters therefor; Dies therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/44—Cutters therefor; Dies therefor
    • B26F2001/4427—Cutters therefor; Dies therefor combining cutting and forming operations

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Forests & Forestry (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Birds (AREA)
  • Biomedical Technology (AREA)
  • Epidemiology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Abstract

The invention relates to a punching device and a method for manufacturing pads, wherein the punching device comprises a female die and a male die which are movable towards each other in a punching direction, wherein the male die comprises a punching element and the female die comprises an orifice that is aligned with the punching element in the punching direction, wherein the female die is provided with a first cutting portion and a first pinching portion, wherein the male die is provided with a second cutting portion and a second pinching portion, wherein the punching device is further provided with at least one heating element for heating at least the first pinching portion or the second pinching portion.

Description

NLP196881A
Punching device for manufacturing pads
BACKGROUND
The invention relates to a punching device for manufacturing pads, in particular cosmetic or medical pads.
Known cosmetic and medical pads are typically made fully out of cotton. The circumferential edges of the known pads are compressed with a punching device to stitch or seal the layers of the pad together and to form a circumferential stitch or seal. This has worked fine for full cotton pads for many years. Recently however, there has been in an increase in pads manufactured with alternative materials, such as synthetic fibers or a mixture of cotton and synthetic fibers. These pads have a relatively high shape memory or resilience to deformation, such that after compression, the circumferential stitch or seal is not permanent and thus unreliable. The quality and consistency of the pads can no longer be ensured. Although in some cases a significant increase in the compression force (overloads to 120% of the normal compression force) still provides a reliable seal, this is generally not favorable to the lifespan of the punching device and its associated tooling.
It is an object of the present invention to provide a punching device for manufacturing pads, in particular cosmetic or medical pads, wherein the reliability of the circumferential seal of the pads can be increased.
SUMMARY OF THE INVENTION
According to a first aspect, the invention provides a punching device for manufacturing pads, in particular cosmetic or medical pads, wherein the punching device comprises a female die and a male die which are movable towards each other in a punching direction to punch out the pads, wherein the male die comprises a punching element and the female die comprises an orifice that is aligned with the punching element in the punching direction for receiving said punching element, wherein the female die is provided with a first cutting portion and a first pinching portion surrounding the orifice, wherein the male die is provided with a second cutting portion and a second pinching portion at the punching element, wherein the first cutting portion and the second cutting portion are opposite to each other in the punching direction and are arranged to interact in said punching direction for cutting out the pad and for forming a circumferential edge of the pad, wherein the first pinching portion and the second pinching portion are opposite to each other in the punching direction and are arranged to interact in said punching direction for compressing the cut-out pad to form a circumferential seal at or near the circumferential edge of the cut-out pad, wherein the punching device is further provided with at least one heating element for heating at least the first pinching portion or the second pinching portion.
By heating the region of the cut-out pad where the circumferential seal is formed, the shape memory or resilience to deformation of the material of the cut-out pad can be reduced, thereby improving the reliability of the circumferential seal. Although this may have advantages when sealing full cotton pads, the invention is particularly useful when the pads comprise alternative, non-cotton material, such as synthetic fibers. The bonds between the long-chain polymer molecules in the fibers can be effectively loosened by the heating. As the fibers cool down, they can hold their new shape, thereby reducing the memory effect of the fibers.
In an embodiment the at least one heating element comprises a first heating element for heating the first pinching portion surrounding the orifice in the female die. The cut-out pad can thus be heated from at least the side of the female die.
In an embodiment thereof the first heating element is arranged in thermal contact with the first pinching portion. The first pinching portion can be heated by the first heating element, e.g. through direct contact with the first heating element.
In an alternative embodiment thereof the female die comprises a plate, wherein the orifice is positioned in the plate, wherein the first heating element is arranged in thermal contact with the plate for indirectly heating the first pinching portion of the orifice of the female die. By heating the plate, at least part of the heat transferred from the first heating element into the plate can be conductively transferred to the first pinching portion.
In an embodiment the at least one heating element comprises a second heating element for heating the second pinching portion of the punching element of the male die. The cut-out pad can thus be heated from at least the side of the male die.
In an embodiment the second heating element is arranged in direct thermal contact with the second pinching portion. The second pinching portion can be heated by the second heating element, e.g. through direct contact with the second heating element.
In a highly efficient embodiment the female die comprises a plurality of orifices, each with a first cutting portion and a first pinching portion, and wherein the male die comprises a plurality of punching elements, each with a second cutting portion and a second pinching portion, wherein each of the plurality of punching elements is aligned above and interacts with one of the plurality of orifices in the punching direction, wherein the at least one heating element is arranged for heating at least the first pinching portions of the female die or the second pinching portions of the male die. The punching device according to this embodiment can simultaneously punch out a plurality of pads in a single stroke in the punching direction.
In an embodiment thereof the at least one heating element comprises a plurality of first heating elements that are arranged in thermal contact with the first pinching portions surrounding the orifices of the female die for heating said first pinching portions. The plurality of first heating elements can individually heat the first pinching portions .
In an alternative embodiment thereof the female die comprises a plate, wherein the plurality of orifices are positioned in the plate, wherein the at least one heating element comprises a first heating element that is arranged in thermal contact with the plate for indirectly heating the first pinching portions surrounding the orifices of the female die. The first heating element can indirectly heat all of the first pinching portions in the plate.
In an embodiment the at least one heating element comprises a plurality of second heating elements that are arranged in thermal contact with the second pinching portions of the plurality of punching elements of the male die for heating said second pinching portions. The plurality of second heating elements can individually heat the second pinching portions.
In an embodiment the punching device comprises a control unit that is operationally connected to the at least one heating element for setting the temperature of said at least one heating element. The heating element can thus be controlled through manual or autonomous operation of the control unit.
In an embodiment the control unit is operationally connected to both the first heating element and the second heating element for heating the first pinching portion and the second pinching portion simultaneously. By heating the cut-out pad from the side of the female die and the side of the male die simultaneously, the distribution of the heat transferred into the cut-out pad between the first pinching portion and the second pinching portion can be more uniform.
In an embodiment the control unit is arranged for setting the temperature of the at least one heating element to a level at which the pad in use is heated to a temperature in the range of 40 to 200 degrees Celsius between the first pinching portion and the second pinching portion. The aforementioned heat range can reduce the shape memory or resilience to deformation of the material of the cut-out pad, in particular in the event of the material comprising synthetic fibers.
Alternatively the control unit is arranged for setting the temperature of the at least one heating element to a level at which the pad in use is heated to a temperature of at least 200 degrees Celsius between the first pinching portion and the second pinching portion. The aforementioned temperature can cause the synthetic fibers in the cut-out pad to change structure, melt and/or fuse together to form a more homogenous material at the circumferential seal.
In an embodiment the at least one heating element is a heating element of the electrical heater type or the fluid filled heat exchanger type. These types of heaters have proven to be particularly effective at transferring heat into the first pinching portion and the second pinching portion.
According to a second aspect, the invention provides a method for manufacturing pads, in particular cosmetic or medical pads, with the use of the aforementioned punching device, wherein the method comprises the step of heating at least the first pinching portion or the second pinching portion.
By heating the region of the cut-out pad where the circumferential seal is formed, the shape memory or resilience to deformation of the material of the cut-out pad can be reduced, thereby improving the reliability of the circumferential seal. Although this may have advantages when sealing full cotton pads, the invention is particularly useful when the pads comprise alternative, non-cotton material, such as synthetic fibers. The bonds between the long-chain polymer molecules in the fibers can be effectively loosened by the heating. As the fibers cool down, they can hold their new shape, thereby reducing the memory effect of the fibers.
In an embodiment the method further comprises the step of simultaneously heating the first pinching portion and the second pinching portion. By heating the cut-out pad from the side of the female die and the side of the male die simultaneously, the distribution of the heat transferred into the cut-out pad between the first pinching portion and the second pinching portion can be more uniform.
In an embodiment the method comprises the step of heating the pad to a temperature in the range of 40 to 200 degrees Celsius between the first pinching portion and the second pinching portion. The aforementioned heat range can reduce the shape memory or resilience to deformation of the material of the cut-out pad, in particular in the event of the material comprising synthetic fibers.
In an embodiment the method comprises the step of heating the pad to a temperature of at least 200 degrees Celsius between the first pinching portion and the second pinching portion. The aforementioned relatively high temperature can cause the synthetic fibers in the cut-out pad to melt and fuse together to form a more homogenous material at the circumferential seal.
In a preferred embodiment the pad comprises cotton, synthetic fibers or a combination of cotton and synthetic fibers. As mentioned before, the punching device and method according to the invention are effective in reducing the shape memory and/or resilience to deformation of pads of full cotton, but can be particularly effective when used in combination with pads comprising synthetic fibers .
According to a third aspect, the invention provides a pad, in particular a cosmetic or medical pad, comprising a main body that is delimited by a circumferential edge, wherein the pad comprises a circumferential seal at or near the circumferential edge, wherein the material of the pad at the circumferential seal is at least partly fused. The pad, which can be obtained by operating the aforementioned punching device in accordance with the steps of the aforementioned method, can be reliably sealed by fusing the material at the circumferential seal. Hence, the reliability of the circumferential seal of the resulting pad can be improved.
In an embodiment, the pad comprises synthetic fibers. The fusing can be particularly effective when the pad comprises synthetic fibers, which have long-chain polymer molecules, the bonds of which are loosened when subjected to heat. After the molecules have cooled down, they will hold their new shape, thereby reducing the memory effect of the fibers.
The various aspects and features described and shown in the specification can be applied, individually, wherever possible. These individual aspects, in particular the aspects and features described in the attached dependent claims, can be made subject of divisional patent applications .
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be elucidated on the basis of an exemplary embodiment shown in the attached schematic drawings, in which: figure 1 shows an isometric view of a punching device for manufacturing pads according to the invention, with a male die and a female die; figure 2 shows one of the pads manufactured with the punching device according to figure 1; and figure 3 shows a cross section of the male die and the female die according to the line III - III in figure 1.
DETAILED DESCRIPTION OF THE INVENTION
Figure 1 shows a punching device 1 for manufacturing pads 9, in particular cosmetic or medical pads, according to an exemplary embodiment of the invention.
One of the pads 9 is shown in more detail in figure 2. Each pad 9 is provided with a main body 90 comprising one or more plies or layers of cotton for the absorption and/or application of liquid or semi-solid substances. The main body 90 is delimited by a circumferential edge 91. In this exemplary embodiment, the main body 90 of the pad 9 is disc-shaped, thus resulting in a substantially circular circumference at the circumferential edge 91. The scope of the invention is however not limited to the disc-shaped pads 9. The punching device 1 according to the invention can also be used to manufacture pads with oval, square, rectangular circumferences or even specials, e.g. so as to resemble geometrical or non-geometrical shapes.
The layers of the main body 90 are compressed by the punching device 1 at or near the circumferential edge 91 to form a stitch print or a circumferential seal 92. The seal 92 can either be continuous (e.g. through stitching) or intermittent (e.g. through perforation), depending on the tooling that is used. Known cosmetic and medical pads are typically made fully out of cotton. The pad 9 as shown in figure 2 however can be full cotton or, as in this example, may comprises an alternative material, for example synthetic fibers or a mixture of cotton and synthetic fibers. The pads 9 made of the alternative material, in particular of the synthetic fibers or the mixture of cotton and synthetic fibers, have an even greater shape memory or resilience to deformation than the full cotton pads. As a result the compression of the layers at the circumferential edge 91, which would normally permanently seal the pad 9 at high compression force, is not permanent at a lower compression force and will eventually loosen or even detach. The punching device 1 according to the invention aims at reliably sealing the layers of these pads 9 at a relatively low compression force.
The punching device 1 comprises a female die 2, a male die 3 and an actuator 4 for moving the female die 2 and the male die 3 towards each other in a punching direction P. The male die 3 is arranged to interact with the female die 2 to stamp out or punch out the individual pads 9 from a number of superimposed sheets 93 (only partly shown in figure 1) that after the punching form the layers of the pads 9. The female die 2 comprises a plate 20 for supporting the sheets between the female die 2 and the male die 3 in the punching direction P and a plurality of orifices 21 in the plate 20 facing towards the male die 3 for passively receiving the male die 3 in the punching direction P. At each of the orifices 21, the female die 2 is provided with a first cutting portion 22 and a first pinching portion 23 surrounding the respective orifice 21. The first cutting portion 22 is provided with a circumferential first cutting edge 24 corresponding to the desired circumferential edge 91 of the pad 9 to be manufactured. The first pinching portion 23 is provided with a first pinching surface 25 extending circumferentially and radially within the first cutting edge 24 at the desired position of circumferential seal 92 of the pad 9 to be manufactured.
The male die 3 comprises a support member 30 and a plurality of punching elements 31 mounted to and suspended from the support member 30 in the punching direction P above the plurality of orifices 21 in the plate 20 of the female die 2. Each of the plurality of punching elements 31 is aligned above and actively interacts with one of the plurality of orifices 21 in the punching direction P to cut out and pinch the pads 9 in a single stroke in the punching direction P. In this particular example, the actuator 4 is arranged for actively moving the male die 3 towards the female die 2, while the female die 2 remains stationary. The actuator 4 may be an eccentric drive (not shown and known per se) that reciprocally moves the male die 3 back and forth in the punching direction P with respect to the female die 2. Each of the punching elements 31 comprises a second cutting portion 32 and a second pinching portion 33. The second cutting portion 32 is provided with a circumferential second cutting edge 34 corresponding to the desired circumferential edge 91 of the pad 9 to be manufactured. The second pinching portion 33 is provided with a second pinching surface 35 extending circumferentially within the second cutting edge 34 at the desired position of circumferential seal 92 of the pad 9 to be manufactured.
The cutting portions 22, 32 of the female die 2 and the male die 3 are arranged directly opposite to each other in the punching direction P and interact in said punching direction P to cut-out the pads 9 and to form the desired circumferential edge 91. The pinching portions 23, 33 of the female die 2 and the male die 3 are arranged directly opposite to each other in the punching direction P and interact in said punching direction P to compress a region of the layers of the cut-out pad 9 at or near the circumferential edge 91 to form the circumferential seal 92.
As shown in cross section in figure 3, the punching device 1 is provided with one or more heating elements 5 for heating the first pinching portions 23 of the female die 2 or the second pinching portions 33 of the male die 3, or both. The one or more heating elements 5 are preferably of the electrical heater type or the fluid filled heat exchanger type. In this exemplary embodiment, the one or more heating elements 5 comprise a first heating element 51 that is arranged in a heat-exchange relationship or thermal contact with the plate 20 of the female die 2 for indirectly and/or conductively heating the plate 20, including all of the first pinching portions 23, to a set temperature. To effectively and uniformly heat the entire plate 20 of the female die 2, the first heating element 51 is preferably plate-like and/or is in thermal contact across a substantial part or the entire surface area of the plate 20. Alternatively, the punching device 1 may be provided with a plurality of first heating elements (not shown) which are arranged in thermal contact or direct thermal contact with the first pinching portions 23 for individually heating the first pinching portions 23. The punching device 1 further or alternatively comprises a plurality of second heating elements 52 which are arranged in thermal contact with the second pinching portions 33 for individually heating the second pinching portions 33 to a set temperature. In this example, the second heating elements 52 are coil-shaped electrical or fluid filled heating elements extending on the inside of the punching elements 31 and arranged in direct contact with second pinching portions 33 of the respective punching elements 31.
As shown in figure 1, the punching device 1 is provided with a control unit 6 that is operationally connected to each of the one or more heating elements 5 to control the temperature of the first pinching portions 23 or the second pinching portions 33, or both. The control unit 6 may be manually operated and/or can be arranged to operate autonomously based on a set of given parameters.
With the aforementioned punching device 1 according to the invention, it is possible to transfer heat into the compressed regions of the cut-out pad 9 between the pinching portions 23, 33 to effectively loosen the bonds between the long-chain polymer molecules in the fibers of the alternative material of the pad 9. As the fibers cool down, they will hold their new shape, thereby reducing the memory effect of the fibers. The control unit 6 is arranged for setting the temperature of the one or more heating elements 5 to a level at which the pad 9 is heated to a temperature in the range of forty (40) degrees Celsius and two-hundred (200) degrees Celsius. Alternatively, the control unit 6 can be arranged for setting the temperature of the one or more heating elements 5 to a level at which the pad 9 is heated to a temperature of at least two-hundred (200) degrees Celsius, or a temperature at which the synthetic fibers in the pad 9 will start to meld, thereby fusing the fibers together to form a more homogenous circumferential seal 92.
In this particular example, the control unit 6 is arranged for heating both the female die 2 and the male die 3 simultaneously to transfer heat into the pad 9 from both the side of the female die 2 and the male die 3. This generates a more uniform distribution of the transferred heat through the layers of the pad 9 in the punching direction P. Alternatively, the control unit 6 can be arranged for activating the one or more first heating elements 51 in the female die 2 or the plurality of second heating elements 52 in the male die 3 only, thus transferring heat into the pads 9 only from the side of the female die 2 or the side of the male die 3, respectively.
The transfer of heat into the pads 9 reduces or eliminates the need to increase or overload the compression force of the punching device 1 in the punching direction P. The pads 9 can be compressed between the pinching portions 23, 33 with a normal or even less than normal compression force, while still obtaining pads 9 with a reliable circumferential seal 92. The punching device 1 and its tooling will thus have a longer lifespan and require less maintenance.
It is to be understood that the above description is included to illustrate the operation of the preferred embodiments and is not meant to limit the scope of the invention. From the above discussion, many variations will be apparent to one skilled in the art that would yet be encompassed by the spirit and scope of the present invention.
In summary, the invention relates to a punching device 1 and a method for manufacturing pads 9, wherein the punching device 1 comprises a female die 2 and a male die 3 which are movable towards each other in a punching direction P, wherein the male die 3 comprises a punching element 31 and the female die 2 comprises an orifice 21 that is aligned with the punching element 31 in the punching direction P, wherein the female die 2 is provided with a first cutting portion 22 and a first pinching portion 23, wherein the male die 3 is provided with a second cutting portion 32 and a second pinching portion 33, wherein the punching device 1 is further provided with at least one heating element 5 for heating at least the first pinching portion 23 or the second pinching portion 33.

Claims (22)

1. Stansinrichting voor het vervaardigen van watten, in het bijzonder cosmetische of medische watten, waarbij de stansinrichting een vrouwelijke stempel en een mannelijke stempel omvat welke ten opzichte van elkaar beweegbaar zijn in een stansrichting teneinde de watten uit te stansen, waarbij de mannelijke stempel een stanselement omvat en de vrouwelijke stempel een opening omvat die is uitgelijnd met het stanselement in de stansrichting voor het ontvangen van het stanselement, waarbij de vrouwelijke stempel is voorzien van een eerste snijgedeelte en een eerste knijpgedeelte die de opening omgeven, waarbij de mannelijke stempel is voorzien van een tweede snijgedeelte en een tweede knijpgedeelte bij het stanselement, waarbij het eerste snijgedeelte en het tweede snijgedeelte tegenover elkaar gelegen zijn in de stansrichting en zijn ingericht samen te werken in de stansrichting voor het uitsnijden van de wat en voor het vormen van een omtreksrand van de wat, waarbij het eerste knijpgedeelte en het tweede knijpgedeelte tegenover elkaar gelegen zijn in de stansrichting en zijn ingericht samen te werken in de stansrichting voor het samendrukken van de uitgesneden wat teneinde een omtreksafdichting bij of nabij de omtreksrand van de uitgesneden wat te vormen, waarbij de stansinrichting verder is voorzien van ten minste één verwarmingselement voor het verwarmen van ten minste het eerste knijpgedeelte of het tweede knijpgedeelte.A punching device for manufacturing cotton wool, in particular cosmetic or medical cotton wool, wherein the punching device comprises a female punch and a male punch movable relative to each other in a punching direction to punch out the cotton wool, the male punch being a punching element and the female punch includes an opening aligned with the punching element in the punching direction for receiving the punching element, the female punch having a first cutting portion and a first squeezing portion surrounding the opening, the male punch being provided of a second cutting portion and a second pinching portion at the blanking element, the first cutting portion and the second cutting portion being opposed to each other in the blanking direction and arranged to cooperate in the blanking direction for cutting out the wat and forming a peripheral edge of the what, where the first pinch The part and the second squeezing portion are opposite to each other in the punching direction and are arranged to cooperate in the punching direction for compressing the cut-out to form a circumferential seal at or near the peripheral edge of the cut-out, the punching apparatus further being provided with at least one heating element for heating at least the first squeeze portion or the second squeeze portion. 2. Stansinrichting volgens conclusie 1, waarbij het ten minste ene verwarmingselement een eerste verwarmingselement omvat voor het verwarmen van het eerste knijpgedeelte dat de opening in de vrouwelijke stempel omgeeft.2. Punching device as claimed in claim 1, wherein the at least one heating element comprises a first heating element for heating the first squeezing portion surrounding the opening in the female punch. 3. Stansinrichting volgens conclusie 2, waarbij het eerste verwarmingselement in thermisch contact is aangebracht met het eerste knijpgedeelte.3. Punching device according to claim 2, wherein the first heating element is arranged in thermal contact with the first pinching part. 4. Stansinrichting volgens conclusie 2, waarbij de vrouwelijke stempel een plaat omvat, waarbij de opening gepositioneerd is in de plaat, waarbij het eerste verwarmingselement in thermisch contact is aangebracht met de plaat voor het indirect verwarmen van het eerste knijpgedeelte van de opening van de vrouwelijke stempel.4. Punching device as claimed in claim 2, wherein the female punch comprises a plate, the opening being positioned in the plate, the first heating element being arranged in thermal contact with the plate for indirectly heating the first pinching portion of the female's opening stamp. 5. Stansinrichting volgens één der voorgaande conclusies, waarbij het ten minste ene verwarmingselement een tweede verwarmingselement omvat voor het verwarmen van het tweede knijpgedeelte van het stanselement van de mannelijke stempel.5. Punching device as claimed in any of the foregoing claims, wherein the at least one heating element comprises a second heating element for heating the second squeezing portion of the punching element of the male punch. 6. Stansinrichting volgens conclusie 5, waarbij het tweede verwarmingselement is aangericht in direct thermisch contact met het tweede knijpgedeelte.6. Punching device according to claim 5, wherein the second heating element is oriented in direct thermal contact with the second squeezing section. 7. Stansinrichting volgens conclusie 1, waarbij de vrouwelijke stempel een meervoud van openingen omvat, elk met een eerste snijgedeelte en een eerste knijpgedeelte, en waarbij de mannelijke stempel een meervoud van stanselementen omvat, elk met een tweede snijgedeelte en een tweede knijpgedeelte, waarbij elk van het meervoud van stanselementen uitgelijnd is boven en samenwerkt met één van het meervoud van openingen in de stansrichting, waarbij het ten minste ene verwarmingselement is ingericht voor verwarmen van ten minste de eerste knijpgedeeltes van de vrouwelijke stempel of de tweede knijpgedeeltes van de mannelijke stempel.The punching apparatus of claim 1, wherein the female punch comprises a plurality of openings, each with a first cutting portion and a first pinching portion, and wherein the male punch comprises a plurality of punching elements, each with a second cutting portion and a second pinching portion, each of the plurality of blanking elements is aligned above and cooperates with one of the plurality of openings in the blanking direction, the at least one heating element being adapted to heat at least the first squeezing portions of the female punch or the second squeezing portions of the male punch. 8. Stansinrichting volgens conclusie 7, waarbij het ten minste ene verwarmingselement een meervoud van eerste verwarmingselementen omvat die zijn aangebracht in thermisch contact met de eerste knijpgedeeltes die de openingen in de vrouwelijke stempel omgeven voor het verwarmen van de eerste knijpgedeeltes.8. Punching device according to claim 7, wherein the at least one heating element comprises a plurality of first heating elements which are arranged in thermal contact with the first pinching portions that surround the openings in the female punch for heating the first pinching portions. 9. Stansinrichting volgens conclusie 7, waarbij de vrouwelijke stempel een plaat omvat, waarbij het meervoud van openingen gepositioneerd zijn in de plaat, waarbij het ten minste ene verwarmingselement een eerste verwarmingselement omvat dat is aangebracht in thermisch contact met de plaat voor het indirect verwarmen van de eerste knijpgedeeltes die de openingen in de vrouwelijke stempel omgeven.The punching apparatus according to claim 7, wherein the female punch comprises a plate, the plurality of openings being positioned in the plate, the at least one heating element comprising a first heating element arranged in thermal contact with the plate for indirect heating of the first squeeze portions that surround the openings in the female punch. 10. Stansinrichting volgens één der conclusies 7-9, waarbij het ten minste ene verwarmingselement een meervoud van tweede verwarmingselementen omvat die in thermisch contact zijn aangebracht met de tweede knijpgedeeltes van het meervoud van stanselementen van de mannelijke stempel voor het verwarmen van de tweede knijpgedeeltes.Punching device according to any of claims 7-9, wherein the at least one heating element comprises a plurality of second heating elements which are arranged in thermal contact with the second squeezing portions of the plurality of punching elements of the male punch for heating the second squeezing portions. 11. Stansinrichting volgens één der voorgaande conclusies, waarbij de stansinrichting een regeleenheid omvat die operationeel verbonden is met het ten minste ene verwarmingselement voor het instellen van de temperatuur van het ten minste ene verwarmingselement.11. Punching device as claimed in any of the foregoing claims, wherein the punching device comprises a control unit which is operationally connected to the at least one heating element for adjusting the temperature of the at least one heating element. 12. Stansinrichting volgens conclusies 2, 5 en 11, waarbij de regeleenheid operationeel verbonden is met zowel het eerste verwarmingselement en het tweede verwarmingselement voor het gelijktijdig verwarmen van het eerste knijpgedeelte en het tweede knijpgedeelte.12. Punching device according to claims 2, 5 and 11, wherein the control unit is operatively connected to both the first heating element and the second heating element for simultaneously heating the first squeeze section and the second squeeze section. 13. Stansinrichting volgens conclusie 11 of 12, waarbij de regeleenheid is ingericht voor het instellen van de temperatuur van het ten minste ene verwarmingselement op een niveau waarbij de wat in gebruik verwarmd wordt tot een temperatuur in het bereik van 40 tot 200 graden Celsius tussen het eerste knijpgedeelte en het tweede knijpgedeelte.The punching device according to claim 11 or 12, wherein the control unit is adapted to adjust the temperature of the at least one heating element to a level at which the what is in use is heated to a temperature in the range of 40 to 200 degrees Celsius between the first squeeze portion and the second squeeze portion. 14. Stansinrichting volgens conclusie 11 of 12, waarbij de regeleenheid is ingericht voor het instellen van de temperatuur van het ten minste ene verwarmingselement tot een niveau waarbij de wat in gebruik verwarmd wordt tot een temperatuur van ten minste 200 graden Celsius tussen het eerste knijpgedeelte en tweede knijpgedeelte.14. Punching device as claimed in claim 11 or 12, wherein the control unit is adapted to adjust the temperature of the at least one heating element to a level at which the watt in use is heated to a temperature of at least 200 degrees Celsius between the first squeeze portion second squeeze portion. 15. Stansinrichting volgens één der voorgaande conclusies, waarbij het ten minste ene verwarmingselement een verwarmingselement is van het elektrisch verwarmingselement type of het vloeistof gevulde warmtewisselaar type.Punching device according to any one of the preceding claims, wherein the at least one heating element is a heating element of the electric heating element type or the liquid-filled heat exchanger type. 16. Werkwijze voor het vervaardigen van watten, in het bijzonder cosmetische of medische watten, met gebruikmaking van de stansinrichting volgens conclusie 1, waarbij de werkwijze de stap omvat van het verwarmen van ten minste het eerste knijpgedeelte of het tweede knijpgedeelte.A method of manufacturing cotton wool, in particular cosmetic or medical cotton wool, using the punching device of claim 1, wherein the method comprises the step of heating at least the first squeeze portion or the second squeeze portion. 17. Werkwijze volgens conclusie 16, waarbij de werkwijze verder de stap omvat van het gelijktijdig verwarmen van het eerste knijpgedeelte en het tweede knijpgedeelte.The method of claim 16, wherein the method further comprises the step of simultaneously heating the first squeeze portion and the second squeeze portion. 18. Werkwijze volgens conclusie 16 of 17, waarbij de werkwijze de stap omvat van het verwarmen van de wat tot een temperatuur in het bereik van 40 tot 200 graden Celsius tussen het eerste knijpgedeelte en het tweede knijpgedeelte.The method of claim 16 or 17, wherein the method comprises the step of heating the wat to a temperature in the range of 40 to 200 degrees Celsius between the first pinch portion and the second pinch portion. 19. Werkwijze volgens conclusie 16 of 17, waarbij de werkwijze de stap omvat van het verwarmen van de wat tot een temperatuur van ten minste 200 graden Celsius tussen het eerste knijpgedeelte en het tweede knijpgedeelte.The method of claim 16 or 17, wherein the method comprises the step of heating the wat to a temperature of at least 200 degrees Celsius between the first pinch portion and the second pinch portion. 20. Werkwijze volgens één der conclusies 16-19, waarbij de wat katoen, kunststofvezels of een combinatie van katoen en kunststofvezels omvat.A method according to any one of claims 16-19, wherein the cotton comprises cotton, plastic fibers or a combination of cotton and plastic fibers. 21. Wat, in het bijzonder een cosmetische of medische wat, omvattend een hoofdlichaam dat begrensd is door een omtreksrand, waarbij de wat een omtreksafdichting omvat bij of nabij de omtreksrand, waarbij het materiaal van de wat bij de omtreksafdichting ten minste gedeeltelijk samengesmolten is.21. A wat, in particular a cosmetic or medical wat, comprising a main body bounded by a peripheral edge, the wat comprising a peripheral seal at or near the peripheral edge, the material of the wat at the peripheral seal being at least partially fused together. 22. Wat volgens conclusie 21, waarbij de wat kunststofvezels omvat. -o-o-o-o-o-o-o-o-The wat according to claim 21, wherein the wat comprises synthetic fibers. -o-o-o-o-o-o-o-
NL2014455A 2015-03-13 2015-03-13 Punching device for manufacturing pads. NL2014455B1 (en)

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NL2014455A NL2014455B1 (en) 2015-03-13 2015-03-13 Punching device for manufacturing pads.
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1086220A (en) * 1965-04-29 1967-10-04 Ici Ltd Improved embossing tool
EP1228853A2 (en) * 2001-02-06 2002-08-07 I.L.P.R.A. S.P.A. Apparatus for welding sheet material
WO2009035316A1 (en) * 2007-09-12 2009-03-19 Ebm Techniek B.V. Device for cotton discs as well as method for manufacturing thereof
EP2586578A1 (en) * 2011-10-24 2013-05-01 Roweg Holding AG Method and device for producing cotton wool pads

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1086220A (en) * 1965-04-29 1967-10-04 Ici Ltd Improved embossing tool
EP1228853A2 (en) * 2001-02-06 2002-08-07 I.L.P.R.A. S.P.A. Apparatus for welding sheet material
WO2009035316A1 (en) * 2007-09-12 2009-03-19 Ebm Techniek B.V. Device for cotton discs as well as method for manufacturing thereof
EP2586578A1 (en) * 2011-10-24 2013-05-01 Roweg Holding AG Method and device for producing cotton wool pads

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