FR2777825A1 - Equipment finishing wide variety of large-area pressings for e.g. bathroom or kitchen - Google Patents

Abstract

The moving support (22) for the upper pressing die (28) has a vent channel (41) in its frame (39). Its section is square or rectangular. One of its edges has longitudinal slots (44) for aspiration of paint, air and particles. Extraction takes place through a nozzle section (45) and duct (42). This equipment is used in combination with an automated paint applicator. Preferred features: The robotic painting unit for the upper die has a driven paint application head on an extending arm with terminal mounting carrying nozzles. The head paints with a first pass using the fine nozzle for the edges of the upper die, followed by a second pass. Each nozzle is connected to more than one paint reservoir, using corresponding solenoid valves.

Description

A1 2777825

  The present invention relates to an improved arrangement, applicable to the finishing of kitchen elements, bathrooms and the like, having new characteristics. of structure, shape and

  design fulfilling their functions with security

maximum efficiency and effectiveness.

  More specifically, the invention relates

  an arrangement applicable to vertical presses

  specially designed for molding cooking elements

  sine, bathroom or the like which use glass fiber reinforced molding compounds (SMC = sheet molding compound = BMC = bulk molding compound = compound of

  molding in bulk) whose role is to obtain

  those which must have a polyester surface finish on at least part of their sides

High quality PMC.

  The molding of the parts indicated above is obtained by means of the press working technique, that is to say by means of a mold formed from

  two parts or halves which are fixed on two plates

  heads of a press and between which a quantity

  material (SMC or BMC), previously determined

  placed in the part of the mold which is integral with the fixed lower plate of the press, compresses under high pressure and is forced to adapt to the

mold shape.

  By Spanish patent no. 9302553 (X) of the same type

  There are known improvements to the process for molding kitchen, bathroom or similar elements which consist, in an initial phase of

  each molding operation, to be projected, on the par-

  mold tie attached to the movable upper plate of the

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  press, an even layer of a polyest paint

  ter in PMC powder, which is fixed electrosta-

  on the surface of said part, in the re-

  covering and polymerizing thereon thanks to the relatively high temperature, generally between 130 C and 150 C, that it presents. This projection is carried out automatically by means of a

  duly programmed robot, so that a de-

  high degree of regularity in the distribution of the protective layer. Then, in a next phase,

  we place the necessary quantity for the pre-

  material (SMC or BMC) in the part of the mold mounted on

  the fixed bottom plate of the press, this quanti-

  tee is normally controlled by means of a manual weighing operation, which must be carried out with a

  relatively high degree of precision.

  A movement of descent of the movable platform of the press then begins, so that the material is

  compressed at high pressure between the two parts

  of the mold, being forced to adapt to

  this one. During this operation, the paint layer

  ture remains attached to the upper part of the mold, to finally be on the molded part thanks to the

  free double bonds. We finally proceed to the demou-

  lage, which is a technique widely known in itself, and the finished part is subjected to the normal operations of eliminating burrs, finishing and

  control, a specific operation of said invent

  tion being that consisting in carrying out the preceding operations simultaneously with an energetic suction of the ambient air around the mold, so

  that we eliminate and possibly recover the excess

  teeth of the powdered paint sprayed on and removed

  undermines any possibility of a type reaching her

  particles or impurities that could final-

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  ment result in defects of the molded part,

  which in this way solves the problems of conta-

mination in the painting phase.

  We also know, as previously part of the state of the art, the patents USA n

  4 472 451, 4 940 012 and DE n 3 137 425, in the-

  which are described various technical solutions to satisfactorily remedy the contamination problems in the painting phase of molding processes in general, by providing a chamber or closed space in this phase, unlike what

  exists in Spanish Patent No. 9302553 (X) in the-

  that said closed space does not exist.

  Improvements in molding processes for kitchen, bathroom and the like

  requires, for their realization, a suitable arrangement

  plicable to these which constitutes the object of the pre-

  invention and which consists essentially in the modification of some of the elements that

  can consider as state of the art, that is to say

  say part of the half-molds which are involved in the molding operation as well as the robot arms which are involved in the painting operation, as well

that we detail it further.

  The arrangement object of the present invention

  concretely materializes in the upper half-mold

  laughing, which has seen its petal part totally modified

  ripherique due to the fact that it houses a pipe formed by a duct preferably of square or rectangular section in one of the sides of which is provided a series of longitudinal holes which surround

  the entire peripheral part of this half

  mold, with establishment, at a point of this ca-

  nalisation, of an adaptation to a pipe or the like, which allows the suction of the air which is captured by

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  said longitudinal holes and which channels in-

  continuation to the outside with the rest of the paint and particles which otherwise end up on the surface of the containers to be molded, with the resulting loss of quality due to the appearance on the latter of

  stains, speckles and discontinuities in its finish-

  tion. Another element of the arrangement which is the subject of the present invention is the modification of the robot arm for painting the mold surfaces, which is carried out in two distinct stages and by means of two distinct nozzles, so that the painting of the mold surface takes place in a selective manner and by zones, which also makes it possible to obtain a quality hitherto not obtained in this type of part, because, according to a known technique, the operation of painting is done with a single

  passes from a single paint nozzle.

  Another additional element of the recommended arrangement is the fact of providing, for each nozzle, more than one paint tank with the help of which and using the corresponding solenoid valves there will be a possibility of painting more than two colors

with only two nozzles.

  Other details and features of the pre-

  invention will appear during the description

  tion which is made as a result and in which, from a

  partly schematic, we refer to the fig-

  res, which in this specification represent preferred details. These details are given by way of example, with reference to a possible practical case, but it is not limited to

  details set out here; therefore, this des-

  cription must be considered from a point of view il-

  lustrative and without limitation of any kind.

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  The various elements bearing references to the drawings appended to this memo will be listed below: 10 reel holder, 11 reel, 12 frame, 13 cutting table, 14 sheet, 15 structure, 16 strips, 17 support, 18 rocker, 19 table, 20 press, 21 head, 22 movable upper support of the upper plate, 23

  fixed lower support of the lower plate, 24 amor-

  weavers, 25 columns, 26 lower mold, 27 half

  lower mold, 28 upper half-mold, 29 painting robot, 30 base, 31 guide, 32 elevator, 33 arms,

  34 extendable arms, 35 nozzle holders, 36 paint head

  ture, 37 paint nozzle, 38 paint nozzle, 39 mold edge 28, 40 hinge, 41 suction channel, 42 suction duct, 43 edges, 44

holes, 45 nozzle.

  Figure 1 is a schematic perspective of a

  reel holder 10 of SMC or BMC sheet material.

  Figure 2 is a schematic perspective

  a SMC or BMC material strip cutting table.

  Figure 3 is a schematic perspective of a support table for a weighing element of a

  strip or sheet 16 of strip of SMC or BMC material.

  Figure 4 is a schematic perspective

  a molding press which is equipped with two half

  mussels 27-28 and in the vicinity of which is

a painting robot 29.

  Figure 5 case is a bottom plan view of the movable upper support 26 of the upper plate

  of the press 20 and of the upper half-mold 28.

  Figure 6 is a partial section of the edge 39

  the upper half-mold 28 which makes it possible to see the na-

  of the suction channel 41 provided with holes

suction 44.

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  Figure 7 is a schematic perspective of the paint head 36 provided with paint nozzles

37 and 38.

  FIG. 8 is a schematic side view in height of the press 20 provided with the object arrangements

of the present invention.

  In an embodiment which can be considered as state of the art for obtaining

  kitchen elements or the like using tech-

  molding nics of parts of relative dimensions-

  ment large, the manufacturing process begins with the arrangement of the material, formed of molding compounds reinforced with glass fiber SMC or BMC, in the form of a strip wound around a reel 11 which is carried by the reel holder 10 by means a chassis

12, see figure 1.

  These coils 11 are placed, using the means

  as shown in Figure 2, on ta-

  cutting blades 13 on which the reel strip is forced to unfold and cut to suitable dimensions, using for this purpose a structure which allows the unwinding of 11 and its cutting

next in bands 16.

  Then, using a weighing station, see fig.

  gure 3, a rocker 18 is placed on the table 19, by rigorously weighing said strips 16

  under sufficient weight for the type of soft parts

  1st. The painting operation of the upper molds 28 takes place as a result, as shown in FIG. 4, at

  using the corresponding painting robot 29, by placing

  at the same time erasing the raw material in the lower part of the half-mold 27, the actual molding operation then taking place, an operation during which the product is brought together under great pressure

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  support 22, which retains the upper plate, and the lower plate 26, which is immobilized in

  the lower support 23, and, with these, the half

molds 27-28.

  The foregoing operations are those which essentially constitute a conventional molding operation for this type of part using presses, while the arrangements which are the subject of the present invention are essentially centered on the fact

  that peripheral suction channels are provided

  surrounding, as shown in Figure 5, the

  rectangular peripheral part of edge 39 of the sup-

  port 20 and that this channel 39 has a series of longitudinal holes 44 covering the entire length of this peripheral part and, as regards its

  inner part, as shown in figure 2,

  carries a suction channel 41 which is the one which

  carries, on one of its sides, the longitudinal holes

44 previously described.

  The energetic suction of air and of the rest of the paint and of impurities which may be present in the molding operation are evacuated by said conduits 44, by channeling in the channel 41 and leaving with the aid of a nozzle 45 coupled to channel 41

  and a suction pipe or duct 42.

  In a conventional manner, there are provided, in the suction duct 42, suction means,

  such as extractors, which, cooperating with the cy-

  corresponding clones equipped with wet channels, re-

  collect and deposit on elements, such as water and the like, the impurities and paints sucked in

  vicinity of the movable upper support 22 of the half

mold 28.

  Another additional object of the present invention

  tion lies in the painting operation which

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  is carried out by means of the corresponding painting robot 29

  laying, whose head 36 is provided with supports 35 which are used for mounting the paint nozzles 37 and 38

corresponding, see figure 7.

  The painting operation on the edges 43 of the upper half-mold 28 is carried out, as shown in FIG. 4, by means of two passes of the robot, one with the fine paint nozzle 38, which paints the outer edges and edges, such as 43, and the rest, and

  a second pass by means of a rota-

  tion of 90 and an activation and painting operation

  ture by means of the nozzle 37 which follow.

  Another additional object of the present in-

  vention consists in providing, for each nozzle 37-38, more than one paint tank for each, so that the possible painting programs

  are notably extended to more than two colors.

  The other operations are completely conventional

  and the intervening elements previously described also

  classically because the arrangement object of

  the present invention is centered only and exclu-

  sively on the fact of providing means the process described and claimed in the Spanish patent n

9302553 (X) from the same owner.

  What is the present invention having

  been sufficiently described, we understand that it is possible

  ble to introduce into it any modifications of detail which we consider appropriate to

  provided that the variations that we introduce do not modify

  not trust the essence of the invention which is defined

  in the following claims, the arrangement

  using the molding of parts of relative dimensions

  Large, such as refrigerators, kitchen worktops, shower trays, etc. or also

  mailboxes, street furniture, car elements

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  bodywork, distribution cabinets, stadium seats,

  vehicle panels and seats for trans-

  public harbors, garden furniture, electrical appliances

  domestic ques, cladding panels for buildings

and others.

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Claims (4)

  1. Improved layout applicable to the finish-   kitchen, bathroom and ana-   logues and which uses the molding of parts of dimension   relatively large areas, such as refrigerators, kitchen worktops, shower trays,   etc. or also mailboxes, ur furniture   bath, bodywork elements, distribution cabinets   stadium seats, panels and vehicle seats   for public transport, garden furniture   din, household electrical appliances, panels   coating for buildings and others, depending on the technology   press work, that is to say by means of a mold formed by two parts or half-molds which are fixed to the two plates of a press and between which it is compressed, under high pressure and by forcing it to adapt to the shape of the mold, a determined quantity of reinforced molding compounds   glass fiber previously deposited in the   tie of the half-mold which is integral with the lower plate   fixed laughter of the press, characterized in that the movable upper support 22) of the plate or half-mold   upper (28) has, in its frame (39), a   nal suction (41) preferably square or rectangular section provided, on one of its sides, multiple longitudinal holes (44) which allow   the suction of paint, air and particles by them   ci, by channeling through the suction channel (41) and being evacuated outside by means of a nozzle   (45) and a suction duct (42), in combination   sound with automatic paint application means fought.   2. Advanced arrangement applicable to the finish-   kitchen, bathroom and ana-   lodges according to claim 1, characterized in that 1 2777825   that the upper mold painting operation (28)   is carried out by means of a painting robot (36) for   seen from a moving paint head, by means of a deployable arm (34) at the end of which are mounted a support (35) and paint nozzles (37, 38).   3. Advanced arrangement applicable to the finish-   kitchen, bathroom and ana-   lodges according to claim 2, characterized in that the head (36) carries out the painting operation by means of a first pass using the nozzle   fine paint (38) for the edges (43) of the upper mold   laughing (28), followed by a second pass or painting with by means of the paint nozzle (37).   4. Advanced layout applicable to the finish-   kitchen, bathroom and ana-   logues according to one of claims 2 or 3, ca-   characterized in that each paint nozzle (37, 38) can be equipped with more than one paint tank   in combination with the corresponding solenoid valves laying.