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
  • B26D7/08—Means for treating work or cutting member to facilitate cutting
• • 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
  • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
  • B26D1/0006—Cutting members therefor
• • 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
  • B26D7/34—Means for performing other operations combined with cutting for applying a coating, such as butter, to cut product
• • 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
  • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
  • B26D1/0006—Cutting members therefor
  • B26D2001/0033—Cutting members therefor assembled from multiple blades
• • 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
  • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
  • B26D1/0006—Cutting members therefor
  • B26D2001/004—Cutting members therefor not rotating
• • 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
  • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
  • B26D1/0006—Cutting members therefor
  • B26D2001/0053—Cutting members therefor having a special cutting edge section or blade section
• • 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
  • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
  • B26D3/08—Making a superficial cut in the surface of the work without removal of material, e.g. scoring, incising
• • 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
  • B26D7/26—Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member
  • B26D7/2614—Means for mounting the cutting member

Definitions

• the invention relates to a device for cutting a line of weakness into a film, comprising a blade with a blade tip pointing in the cutting direction, which is bounded by three intersecting wedge surfaces, a blade holder and a channel for supplying a liquid behind the blade tip in the line of weakness.
• the liquid may be a release agent which is introduced into the parting line in order to prevent sticking of the parting surfaces delimiting the parting line with subsequent intumescence of the film with an intregral foam.
• Such a device is known from DE PS 102004009351.
• the blade consists of carbide or HSS steel. She is of a very close Drilled hole for the liquid, which ends at a distance of less than 0.8 mm, advantageously less than 0.45 mm behind the blade tip. Due to the high hardness of the materials required to make the blade, it is extremely costly and difficult to create the bore and place it with the required accuracy.
• the invention is based on the object to further develop such a device that reduces the cost of manufacturing the blade while avoiding a loss of quality.
• the blade holder supports the blade at the end facing away from the cutting direction in the region of the blade tip at at least one support point, that the blade holder is penetrated by a channel opening into the support point for the liquid and that the blade, starting from the mouth of the channel, provided with an open groove, which ends in a downward direction towards the blade tip.
• the tool holder is made of a soft material compared to the blade, for example tool steel, the creation of the closed channel is very simple. There is the particular advantage that much more space is available in the tool holder than in the blade, which allows the diameter compared to the prior art, but at least in the rearward areas, to increase significantly. The production and the supply of the liquid are thereby greatly simplified.
• the continuation of the channel consists of a rearwardly and downwardly open groove, which can be easily produced by grinding in the required quality. Since the groove during the bestimmu ⁇ iliaen use substantially between the
• the groove expediently ends immediately behind the blade tip. Because it is in the visible range along the entire length of its manufacture, its production by grinding or milling is extremely simple.
• the groove has a triangular in the rearward and downward open profile. This ensures a particularly good self-cleaning.
• the groove expediently runs flush behind the blade tip in order to ensure optimal support of the blade tip and optimum wetting of the flank surfaces and the groove bottom of the parting line through the liquid.
• the blade is suitably made of carbide. It is therefore particularly durable. Other hard materials can also be used to make them. Since a removal of essential material components in the manufacture of the blade from the commercially available semi-finished products of parallelepiped shape largely unnecessary, also results in a material savings, which is under Costs of significant advantage. The production can be carried out very quickly using grinding and / or milling processes.
• the blade is expediently received in an at least partially open in the cutting direction groove of the tool holder and can be fixed therein by means of a clamping screw.
• the blade is provided with a recess for clamping in the tool holder, in which the clamping screw can be inserted.
• the recess of hollow conical or wedge-shaped inwardly tapered shape and, relative to the imaginary extension of the central axis of the clamping screw, displaced relative to the blade tip mounted when the blade is pressed against your stop.
• the blade tip When replacing a blunt blade with a new one, therefore, the blade tip always takes the same assignment to the blade holder, without the need for time-consuming adjustments.
• the clamping screw can also be replaced by a quick-release device.
• the clamping screw is appropriate, based on the longitudinal direction of the groove to be generated and the blade, arranged centrally to prevent jamming or transverse loads.
• the blade holder expediently consists of tool steel. It can be easily manufactured in the required accuracy and equipped with a blade.
• the advantages achieved by the invention consist in a particularly cost-effective manufacturability of a usable unit from the blade and a customized tool holder. A modular training and use is easily possible.
• Fig. 1 a ready-made module comprising a blade inserted into a blade holder in a partially cutaway view
• Fig. 2 the assignment of the mouth of the channel to the inlet opening of the groove in a perspective view
• the device shown in Fig. 1 is used for cutting a line of weakness in a film, comprising a blade 1 with a blade tip 2 pointing in the cutting direction, which is bounded by three intersecting wedge surfaces 3, 4, 5 (Fig. 3), a blade holder and a channel 7 for supplying a liquid, preferably a release agent, to the blade 1 behind the blade tip 2 in the weakening line, for example, a release agent.
• a liquid preferably a release agent
• the supply of the liquid to the channel 7 takes place through a hose 11 of conventional diameter, which is usually connected to a metering pump, not shown in the drawing.
• the blade 1 is fixed in a blade holder 6 so that the blade 1 is supported on the blade holder 6 at the end facing away from the cutting direction in the region of the blade tip 2 at at least one support point 8.
• the blade holder 6 is penetrated by an opening in the support point 8 channel 7 for the liquid, wherein the blade 1, starting from the mouth of the channel 7, is provided with an open groove 9, which ends downwards and towards the blade tip 2 preferred ,
• the support point which has a planar design and seals against the blade 1 in these areas, closes off the channel in a liquid-tight manner.
• no release agent can reach into areas outside of the parting line produced by the blade during cutting.
• Fig. 2 shows the Zudix the mouth of the channel 7 to the inlet opening of the groove in a view obliquely from behind. Since it is located outside the parting line created by the blade, there are no problems in choosing the diameter as well as the required robustness and ease of manufacture.
• the channel 7 forming hole is narrowed, especially in the region of the mouth to the width of the groove. This avoids that liquid exits laterally or upward above the parting line generated by the blade 1 and dirty the surface of the processed film. Avoiding such soiling is extremely important because the release agent is difficult to remove from the film and could cause blistering if the film is later foamed with a reaction foam to form a firm, adhesive bond is sought between the film and the foam body produced by the foam backing.
• the blade 1 is made of hard metal and is accordingly extremely resistant to wear. It can be obtained by mechanical processing of a semi-finished product of cuboidal blank (FIG. 3), for example by a grinding and / or milling process.
• Fig. 4 shows that the groove ends flush with the surface immediately behind the blade tip. This avoids an unnecessary weakening of the cross section of the blade in the region of the blade tip and ensures a uniform wetting of the flank surfaces, not shown, of the parting line produced by the blade during the intended use.
• the groove 9 has a substantially triangular in the rearward and downward open profile and is thus pollution-proof. It is generated by a grinding process.
• the blade 1 is received in a partially open in the cutting direction groove of the tool holder 6 and fixed therein by means of a clamping screw 12.
• the clamping screw 12 consists of a conically pointed grub screw which engages in a triangular recess 10 (Fig. 3) of the front of the blade 1 and the blade 1 defines in a precisely predetermined position in the blade holder 6 and at the same time sealing the mouth of the Channel 7 surrounding support point 8 presses.
• the deepest point of the recess is for this purpose, based on the imaginary extension of the clamping screw 12, displaced by 0.5 to 2 mm in the direction of the blade tip 2 and mounted centrally.
• Tightening the clamping screw 12 thereby causes not only a firm contact pressure of the blade 1 to their facing away from the cutting direction storage in the blade holder 6 and in particular a sealing contact with the support point 8, but also a Relatiwerschiebung the blade 1 ⁇ n the blade holder 6 in the direction of its upper end against a pinned there, further stop the blade holder. 6
• the blade 1 when tightening the clamping screw 12, the blade 1 repeatedly assumes an exactly predeterminable, non-canting relationship with the blade holder 6. The replacement of a worn blade 1 is therefore easily possible after previous release of the clamping screw 12, without the need for a renewed adjustment.
• the clamping screw 12 by tightening the clamping screw 12, a seal of the groove 9 secured in the lateral direction and upwards in the region of the support point 8, whereby no unwanted liquid reaches the upwardly facing inside of the film to be cut. If necessary, the clamping screw 12 can also be replaced by a quick-action clamping device of similar effectiveness.
• the film can be made of any of the materials used, such as PVC 1 PU or the like. It is generally provided on the visible side with a decorative surface graining.
• the blade holder 6 is made of tempered tool steel. It can be easily edited and used modularly after having been equipped with a blade 1.

Landscapes

• Life Sciences & Earth Sciences (AREA)
• Forests & Forestry (AREA)
• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Knives (AREA)
• Details Of Cutting Devices (AREA)
• Nonmetal Cutting Devices (AREA)
• Control And Other Processes For Unpacking Of Materials (AREA)
• Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
• Preliminary Treatment Of Fibers (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=37440255

Family Applications (1)

Country Status (5)

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Family Cites Families (3)

• 2005
  • 2005-10-21 DE DE102005050940A patent/DE102005050940B3/de not_active Expired - Fee Related
• 2006
  • 2006-09-18 IT IT001773A patent/ITMI20061773A1/it unknown
  • 2006-09-19 WO PCT/EP2006/009077 patent/WO2007045317A2/fr active Application Filing
  • 2006-09-19 EP EP06805763A patent/EP1960165B1/fr not_active Not-in-force
  • 2006-09-19 DE DE502006006998T patent/DE502006006998D1/de active Active
  • 2006-09-19 AT AT06805763T patent/ATE468210T1/de active

Non-Patent Citations (1)

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