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
  • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
  • B26D5/08—Means for actuating the cutting member to effect the cut
  • B26D5/18—Toggle-link means
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
  • B29C51/26—Component parts, details or accessories; Auxiliary operations
  • B29C51/30—Moulds
  • B29C51/38—Opening, closing or clamping means
• • 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
  • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
  • B26D5/08—Means for actuating the cutting member to effect the cut
  • B26D5/10—Hand or foot actuated means
• • 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
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
  • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
  • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C66/00—General aspects of processes or apparatus for joining preformed parts
  • B29C66/80—General aspects of machine operations or constructions and parts thereof

Definitions

• the present invention relates to a tool for performing operations such as thermoforming, sealing or cutting packages or containers, said tool being equipped with a locking device of the tool support elements.
• thermoforming tools or molds are carried by supports (frame or tray) kept close together when the thermoforming step,
• thermoforming containers In the field of packaging, it is common to change the shape and size of said thermoforming containers on a given machine. As a result, the molds are placed in tools between two support members hinged together by means of a hinge, one of tray-type cover and the other of the frame type holding the base of the mold.
• the two support elements are then held in the locked position by means of screwed buttons arranged at the periphery.
• screwed buttons arranged at the periphery.
• their screwing and unscrewing is long and tedious and the premature wear of the threads is frequent.
• thermoforming tool locking devices To reduce the opening and closing time, other thermoforming tool locking devices have been proposed.
• tilting latches have been envisaged, for example the use of a type of one-piece latch equipped with a hook hooking on a locking pin.
• To open or close the tray or support cover tooling just pull or push this latch respectively.
• this solution has the disadvantage of insufficient holding in position of the latch particularly during vibration of the thermoforming machine.
• no adjustment between the locking pin and the latch is possible.
• Locking devices of the "toggle” type such as described in WO2004 / 040149. These devices comprise a lever applying a traction force between the two parts to be fixed and tightened.
• the passage of the hard point or anti-recoil of the latch is obtained through an elastic deformation of the latch or other mechanical part of the latch (hook or support). This is why these latches are often made of elastic materials.
• Such latches generally support only small efforts (rarely exceeding a few hundred kg). They are therefore not suitable for thermoforming machines in which the locking system must withstand loads of several tons, and therefore exclude mechanical parts that deform.
• thermoforming tools In addition to thermoforming tools, there are also needs for tool locking devices for carrying out operations such as sealing, marking, labeling and cutting.
• An object of the present invention is therefore to provide a tool, including thermoforming, equipped with a robust locking device, easy and quick to lock and unlock, preferably without threading.
• Another object of the invention is to overcome the drawbacks of current locking devices by providing a reliable locking tool system, resistant to vibration of said tools and the variations or different pressures implemented.
• Another object of the invention is to provide a tool locking device for locking two elements of the tool, for example a cover and a base, over their entire length in a single action of the operator.
• the invention relates to a tool for carrying out operations selected from the group consisting of thermoforming, sealing and cutting packages or containers, comprising two elements, for example a lid and a base of which at least one is a tool support, articulated by means of a hinge between a spaced position in which the elements are inactive and a close position in which the elements are active while being held in close position by means of a locking device disposed on one of their edges.
• the tooling is characterized in that said locking device is formed of a pivoting handle which is rotatably mounted about an axis integral with one of the tool support elements, called the first element, and which carries the pivot axis of at least two latches each equipped with a hook adapted to to hook onto a hooked piece secured to the second tool support member, so as to keep the two tool support elements close together, said handle being pivotable between the following positions, corresponding to a stroke of the pivot axis latches around the pivot axis of the handle:
• an anti-cusp point in which the axis of pivoting of the latches is aligned with the pivot axis of the handle and the hanging part, the latches being hooked on said hooked piece
• the locking device has the advantage over "single-latch" systems of allowing, by means of the pivoting handle, to simultaneously actuate the two latches acting on their respective hooks to lock the two tool support members, on a length corresponding to the spacing between the two latches.
• This length can be, for example, the length of the tool support elements: this quickly gives the locking of the tool over its entire length, without any binding.
• the so-called locking position beyond the anti-recoil point allows vibration-resistant locking tools, for example during thermoforming which imposes significant pressure and significant effort between the cover and the base.
• the seal between the two tool support elements has two main functions, namely that it compresses for the passage of the anti-cusp point and when the tool is closed, it maintains an effort to remove any game possible.
• a further object of the invention is to provide a tool equipped with a locking device allowing adjustment between the support elements of the tools to adjust the closing force.
• the tooling is characterized in that the hooked latch piece is adjustable so as to adjust the spacing between the two tool support elements, so as to adjust the force of passage of the anti-lock point. cusp of the handle, depending on the required crushing of the seal.
• Figure 1 shows a side view of a thermoforming tool equipped with a locking device according to the invention
• FIG. 2 is a perspective view of the locking device of the tooling of the Figure 1 (without the cover element removed for clarity);
• FIGS. 3a to 3d show in section the different stages of locking by means of the device of FIG. 2.
• thermoforming tool 1 comprises, firstly in the upper part, a plate forming the upper element 2 supporting an upper tooling 6 and, on the other hand in the lower part, a base constituting the element 3 support of a lower tooling 7.
• This lower element 3 comprises a frame 4 on which slides an actuator device 5 for raising the lower tool 7 according to the arrow F.
• the upper element 2 and the lower element 3 are articulated by means of a hinge 8 and held in close position by means of a locking device 9.
• This locking device is presented in more detail in FIG. 2.
• the locking device 9 is advantageously arranged on the edge of the plate forming the upper element 2 and the frame 4 opposite the edge carrying the hinge 8,
• This device comprises a handle 12 consisting of a gripping member 13 carried by two parallel flanges 14 and 15 integral with the upper element 2.
• Said handle is rotatably mounted about a pivot axis 16 secured to the upper element 2 of the tool 1 (which is not shown in this figure 2) via the L-shaped parts 17.
• the handle 12 also carries the pivot axis 18 of two latches 19.
• a larger number of latches 19 could be provided according to the length of tooling.
• the latches 19 are each equipped with a hook 20 visible in FIGS. 3a to 3d, suitable for hooking on a hook piece 21 carried by the upper part 11 of the frame 4 forming the lower element 3 of the tooling 1.
• a spacer 27 secures the two latches 19 parallel.
• hooked parts 21 comprise adjustment means 22 of its height relative to the lower element 3.
• a seal 23 is provided in a groove in the upper part 11 of the lower element 3 tool support.
• FIG. 3a shows the so-called opening or unlocking position in which the pivot axis 18 of the latch 19 is separated from the straight line D passing through the axis of the hook piece 21 and the pivot axis of the handle 16.
• the operator In order to lock the tooling 1, the operator simultaneously applies the hook 20 of each of the catches 19 in contact with the hook piece 21 (see FIG. 3b) and then exerts a pressure on the gripping member 13 of the handle 12 from right to left in the figures in the direction of the arrow G.
• the handle reaches a stop against a part 25 secured to the upper element 2,
• the seal 23 partially releases but retains a partial crushing of a value less than its crushing said anti-cusp point of Figure 3c so as to ensure a minimum stress on said handle so that it remains in the locked position.
• the stroke of the pivot pin 18 of the latch is a curved stroke around the axis 16 of pivoting of the handle.
• the stroke of the handle 12 is further guided by a finger 30 integral with the L-shaped part 17 in a slot 31 formed in the body of said handle.
• the stroke of the latch 19 relative to the handle is guided by a finger 33 secured to the handle 12 moving in a slot 33 formed in said latch.
• thermoforming tool any type of tooling, for example cutting tools, welding, sealing, ... can be provided and equipped with such a locking device. .
• the tool support elements are then an upper mold and a lower mold; in the case of a sealing tool, there is the assembly of a weld plate and a lower die; and for a sealing tool, for example, an upper welding and cutting plate and a lower die.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Life Sciences & Earth Sciences (AREA)
• Forests & Forestry (AREA)
• Moulds For Moulding Plastics Or The Like (AREA)
• Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
• Manipulator (AREA)
• Lining Or Joining Of Plastics Or The Like (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=40720396

Family Applications (1)

Country Status (3)

Families Citing this family (4)

Citations (3)

Family Cites Families (4)

• 2008
  • 2008-11-14 FR FR0806389A patent/FR2938505B1/fr active Active
• 2009
  • 2009-11-10 WO PCT/FR2009/052163 patent/WO2010055256A1/fr active Application Filing
  • 2009-11-10 EP EP09768171A patent/EP2344390A1/de not_active Withdrawn

Patent Citations (3)

Non-Patent Citations (1)

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