Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
  • B65H29/58—Article switches or diverters
  • B65H29/64—Article switches or diverters directing the components of composite articles into separate paths
• • 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
  • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
  • B29C63/0004—Component parts, details or accessories; Auxiliary operations
  • B29C63/0013—Removing old coatings

Definitions

• the invention relates to a method for removing protective films located on plate-shaped bodies with the aid of a sheet-like adhesive element which is glued to the protective film to be removed and then peeled off with the latter against the direction of transport of the plate-shaped body, and a device for carrying out this method.
• a plate consisting of a carrier material and coated with an electrically conductive substance is laminated with a photosensitive dry resist film.
• This dry resist film consists of a photosensitive plastic film and, to protect it, a polyester film located above it.
• the dry resist film is laminated excessively on two or more edges of the circuit board. After this process, the circuit boards from Haüd are trimmed at the edge, leaving small protrusions of the film which are used later, i.e. after the subsequent exposure process, to grasp and remove the protective film by hand.
• the resist film is exposed, and after the polyester protective film has been removed, the desired conductor field is formed on the plate by means of corresponding further treatments in various baths.
• the photosensitive plastic film of the dry resist film is provided with a protective film for several reasons
• Exposure must be removed completely without causing damage to the photosensitive film or residues of the protective film may remain on the photosensitive film.
• the protective film on the light-sensitive plastic film of the resist film allows it to be transported in the rolled-up state and also enables the printed circuit boards coated with the film to be transported in the stacked state.
• This known device uses a continuous or endless adhesive tape, which means that considerable amounts of material are required. At the beginning of the process, it is necessary to feed the head part of the adhesive tape over the peeling gap to the peeling rollers located at a distance, which makes it impossible to carry out the peeling process fully automatically. Furthermore, the circuit boards must be loaded in an immediately subsequent sequence, since the adhesive tape cannot be interrupted, because otherwise useless material consumption has to be accepted.
• the invention has for its object to remedy this situation and to propose a method and a device for carrying out the method, with the aid of which a fully automatic and extremely safe removal of the protective film from the laminated photosensitive plastic film takes place with an extremely low consumption of adhesive material.
• a double-sided adhesive adhesive element is applied to the angled edge or corner edge covering and overlapping surface parts of the film located on the plate-shaped body, and that first the surface parts of the adhesive located on the plate-shaped body are then applied element and then the protective film adhering to the other surface parts of the adhesive element are detached from the body in the diagonal direction of the film or in a direction which forms an angle alpha to the film edges which is greater than 0 ° and less than 90 °.
• the adhesive power of the double-sided adhesive element is less on the plate-shaped body than on the protective film to be removed. This provides the possibility of taking up the adhesive element at the point which is glued to the plate-shaped body, while in the case of a further rolling recording, the protective film that now follows remains connected to the adhesive element and therefore slightly stands out from the photosensitive plastic film, the latter itself remains connected to the plate-shaped body.
• the adhesive element is removed from a swivel-mounted supply roll, applied to rollers and then rolled off on the surface parts to capture the protective film.
• the device for carrying out the method has a device for applying an adhesive element and a further device for removing the adhesive element and the protective film connected to it.
• device A for applying a double-sided adhesive element to a roller or to the protective films already wrapped thereon has a pivotally mounted adhesive element dispenser and device B: for removing the protective films in the transport direction behind a transport and adjustment device, a pair of rollers which can be driven in opposite directions and arranged one on top of the other, whose axes are parallel to the plane of the plate-shaped body which is fed on the transport device and whose common central axis is arranged in the central plane of the plate-shaped body.
• the transport and adjustment device for setting an angle alpha which is located between the roller axis and the front edge of the plate-shaped body and is greater than 0 ° and less than 90 °, has a twisting device with a drive, one opposite movable and drivable stop is arranged.
• the distance between the rollers of the pair of rollers can be changed according to the invention and the roller pressure of the rollers pressing against one another is constant with the aid of a pneumatically or hydraulically actuated device and a mechanical transmission system.
• FIGURE 1 is a side view of the device
• FIGURE 2 is a top view of the device of Figure 1
• FIGURE 3 is a perspective view of a device for removing a protective film without the device for applying adhesive elements
• FIG. 4 shows a side view of a device for applying adhesive elements with a schematic illustration of parts from FIG. 1.
• the device according to the invention orders a device 8, 9 for applying an adhesive element 12 and a further device integrated therewith for removing the adhesive element 12 and the protective film connected to it on the plate 11.
• This device consists of a transport and adjustment device for feeding and adjusting the plates 11 and a pair of rollers 1 and 2, which can be driven in opposite directions and are arranged one above the other.
• the axes of the rollers 1 and 2 are arranged parallel to the plane of the plate 11 that can be fed on the transport device 22 and their common central axis lies in the middle plane of the plate 11.
• the rollers 1 and 2 are driven by the motor 3.
• This gear 24 is in engagement with the gear 25 and this in turn with the gear 26 which is mounted on the axis of the roller 2.
• the rollers 1 and 2 serve to receive the protective films received by the plate 11, the protective film on the top of the plate 11 rolling onto the upper roller 1 and the protective film on the underside of the plate 11 rolling onto the lower roller 2. Since this changes the distance between the rollers 1 and 2, but the opposing pressure of the rollers must be constant regardless of the distance between their axes, a system is required which ensures a constant pressure in every operating phase. Such a system is described in more detail with reference to FIGS. 1 and 3.
• a pneumatically operating device 14 is provided, which is connected to the axes of the rollers 1 and 2 via linkages 27 and 28.
• the axes 29 and 30, on which the gears 24 and 25 run freely, are connected to one another via toothed wheel segments 15. If the distance between the rollers 1 and 2 increases, the axes 29 and 30 execute corresponding and counter-rotating rotations, as a result of which the distance between the linkages 27 and 28 at the points of application to the pneumatic device 14 is changed.
• a pressure control ensures that even at different distances between the axes of the rollers 1 and 2, the same pressures prevail on the surfaces of the rollers 1 and 2.
• the plate 11 reaches the effective range of the rollers 1 and 2 in a defined position.
• an angle alpha is set, which is located between the roller axis 1 or 2 and the front edge of the plate 11 and which must be greater than 0 ° and less than 90 °.
• a swivel drive 6 and a cooperating, oppositely arranged and movably designed stop 4, which is driven by the drive 5, ensures that the plate 11 rotates by the angle alpha, so that the plate 11 at the angle alpha in the region of the rollers 1 and 2 can reach.
• the devices 9 are used, each of which transfers a double-sided adhesive element 12 to the rollers 1 and 2, respectively.
• the time at which the adhesive element 12 is transferred to the rollers 1, 2 or to the protective films already wound thereon is determined by the sensor 13, which detects the front corner of the plate 11.
• the device 8 or 9 for applying a double-sided adhesive element 12 to the roller 1 or 2 consists of a braked storage roll 19, from which a double-sided adhesive 21 is transferred via a deflection roller 18 and a pressure roller 17.
• the adhesive 21 is mounted on a carrier tape 16. After transfer of the adhesive 21, the empty carrier tape 16 is guided around the pressure roller 17 and rolled up onto the winding roller 7.
• the rollers 7, 17, 18 and 19 are driven by friction when the adhesive element dispenser 8 or 9 is pressed onto the roller 1 or 2.
• the length of the adhesive element 12 is determined by the pressing time on the rollers 1 or 2. 2 and their rotational speed determined.
• the sequence of movements of the adhesive element dispensers 8 and 9 is carried out by the swivel drive 20.
• the swivel drive 20 When the predetermined length of the adhesive element 12 has been reached, the swivel drive 20 'pulls the adhesive element dispenser 8 or 9 back into its initial position. Since the transfer adhesive has a low tear resistance, a cutting device is not necessary.
• the adhesive element 12 releases the protective film located on the plate 11, which is wound onto the rollers 1 and 2 during the further movement.
• the adhesive element 12 By applying the adhesive element 12 to the protective film which is located on the plate 11 in such a way that parts of the plate 11 are also detected beyond the edge of the protective film, it is ensured that larger parts of the surface of the adhesive element are always present at any time during the removal process are on the roller 1 or 2, as on the protective film to be picked up by the plate 11. At the same time, a larger area of the adhesive element acts on the roller or the foils thereon than on the surface parts of the protective film which are still connected to the plastic film. This ensures that the protective film is completely removed from the photosensitive plastic film in any case.

Landscapes

• Engineering & Computer Science (AREA)
• Manufacturing & Machinery (AREA)
• Mechanical Engineering (AREA)
• Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6251701

Family Applications (1)

Country Status (4)

Cited By (3)

Families Citing this family (5)

Citations (7)

Family Cites Families (2)

• 1984
  • 1984-12-01 DE DE19843443939 patent/DE3443939C2/de not_active Expired
• 1985
  • 1985-11-27 WO PCT/EP1985/000649 patent/WO1986003183A1/de not_active Application Discontinuation
  • 1985-11-27 EP EP19860900653 patent/EP0203999A1/de not_active Withdrawn
  • 1985-11-27 AU AU53176/86A patent/AU5317686A/en not_active Abandoned

Patent Citations (7)

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