EP3325245A1 - Moule - Google Patents

Moule

Info

Publication number
EP3325245A1
EP3325245A1 EP16738723.2A EP16738723A EP3325245A1 EP 3325245 A1 EP3325245 A1 EP 3325245A1 EP 16738723 A EP16738723 A EP 16738723A EP 3325245 A1 EP3325245 A1 EP 3325245A1
Authority
EP
European Patent Office
Prior art keywords
mold
wall
frame
mold plate
forming tool
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP16738723.2A
Other languages
German (de)
English (en)
Inventor
Norbert Reuber
Michael Ansmann
Christian Kluge
Gerd RÖTTINGER
Maximilian KURTZ
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kurtz GmbH
Original Assignee
Kurtz GmbH
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 Kurtz GmbH filed Critical Kurtz GmbH
Publication of EP3325245A1 publication Critical patent/EP3325245A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/58—Moulds
    • B29C44/588—Moulds with means for venting, e.g. releasing foaming gas
    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/30—Mounting, exchanging or centering
    • B29C33/301—Modular mould systems [MMS], i.e. moulds built up by stacking mould elements, e.g. plates, blocks, rods
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/58—Moulds
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/3415—Heating or cooling
    • B29C44/3426—Heating by introducing steam in the mould
    • B29C44/3434—Heating by introducing steam in the mould by using a sheet, grid, etc. to distribute the steam in the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
    • B29K2105/048—Expandable particles, beads or granules

Definitions

  • the present invention relates to a mold for the production of particle foam bodies.
  • WO 2013/120479 A1 lightweight construction tools are described, which have two mold plates, which are surrounded by a mold frame.
  • the mold plates are formed of a multilayered structure having a thin inner layer with which the mold cavity is confined.
  • the thin inner layer significantly reduces the volume of material undergoing thermal cycling during shaping.
  • the multilayer structure has, in addition to the inner layer, a supporting layer and a carrier layer.
  • the support layer is formed from a plurality of support ribs arranged perpendicular to the inner layer, each having a plurality of recesses. Through the recess and the free spaces between the support ribs, a free fluid flow within the support layer is made possible, which is therefore also referred to as a molding line layer.
  • the carrier layer consists of a stable plate. It is also stated in the claims of WO 2013/120479 A1 that the mold frame can be formed from such a multilayer structure.
  • This lightweight tool has proven to be fundamentally very good, because due to the multi-layer structure, the heat capacity to be heated in comparison to conventional tools is considerably reduced leu, whereby the clock cycles can be shortened and energy can be saved.
  • the mold frame has been formed, similar to the mold plates of the tool, with a supporting layer which has recesses and cavities for the passage of steam.
  • This layer structure also consists of a thin inner layer, a support layer and a carrier layer, which is a thick plate in comparison to the inner layer.
  • the lightweight tools have been formed with solid mold frames known from conventional mold tools. Only the mold plates are formed with the multilayer structure.
  • DE 15 04 494 A relates to a device for producing particle foam body with an in turn consisting of two mold halves tool.
  • the walls of the tool halves are formed with different thicknesses.
  • the particles are heated by means of high-frequency radiation and welded together. Therefore, the tool is made of a dielectric which is permeable to the supplied high frequency energy.
  • DE 10 2008 016 883 A1 discloses a method for producing a molded body made of foamed plastic and a device for carrying it out.
  • the air contained in the mold cavity and in the steam chambers is to be removed by means of a steam purge.
  • a steam supply and a vacuum device are provided.
  • the invention has for its object to provide a mold for producing particle foam bodies, which has a mold frame, which has a low heat capacity on the other hand can be reliably manufactured with the necessary precision and mechanically stable.
  • a mold for an apparatus for producing foamed particle foam which defines a mold cavity and frames a mold and has at least one mold plate movable relative to the mold frame.
  • the mold frame has a thin, the mold cavity bounding inner wall and two end walls, which extend from the edge of the inner wall radially outwardly, the end walls are stiffer and in particular thicker than the inner wall.
  • the stiff end walls give the frame a high stability.
  • the thermal connection between the stiff or thick end walls and the mold cavity is low, so that the end walls hardly affect the heat capacity of the mold frame. Therefore, the end walls can be formed with any reasonable thickness, in itself.
  • the end walls contribute to the fact that the distortions that occur when welding the réellewan- with the end walls are small, since the end walls can hardly distort and thus the location of a weld or a weld point, which for connecting one of the end walls with the inner wall are provided, define exactly.
  • the inner wall and the end walls can be connected to one another by means of welding, in particular by laser welding.
  • the individual elements of the mold frame are connected to each other by means of laser welding, since laser welding produces a very thin weld, causing little distortion.
  • the strong end walls can be milled plane-parallel.
  • the end walls can also be rectified due to their thickness in retrospect.
  • a honeycomb structure for stiffening the mold frame is arranged radially outside on the inner walls of the mold frame.
  • the mold may have two mold frames, in each of which a mold plate is displaceably arranged.
  • the two mold frames are preferably arranged adjacent to each other with an end wall, wherein one of the end walls, which is arranged facing the other mold frame, may have a sealing element in order to seal the two mold frames mutually.
  • the thin Innewandung may be thinner or thin-walled compared to the thicker end walls.
  • the thin inner wall has, in particular compared to the end walls, a low heat capacity and thereby withdraws the mold cavity during heating little heat.
  • the end walls have a much greater specific heat capacity than the inner wall. Since the end walls are coupled only with their end faces to the inner wall, the thermal connection to the mold cavity is low, so that the heat capacity of the end walls significantly affect neither the heating nor the cooling of the mold cavity.
  • the thin inner wall is formed with a thickness of at most 3 mm, preferably at most 2.5 mm and in particular at most 2 mm.
  • the rigid end walls have a thickness of at least 8 mm, preferably at least 9 mm and in particular at least 10 mm.
  • the mold frame is preferably formed from four frame parts, wherein each frame part has a strip-shaped, planar inner wall portion.
  • the molding tool is preferably produced by first assembling the frame parts comprising in each case one of the inner wall sections, a honeycomb structure and in each case two Stirnwandungsabschnit ⁇ te, and then the frame parts are joined to the mold frame.
  • the individual wall parts of the mold frame can be welded together. They can also be connected to each other by means of a plug connection, in which case corresponding sealing elements are to be provided.
  • the outward facing surfaces of the end walls can be milled flat.
  • a device for producing particle foam bodies are, for example, two form frame between two pressing surfaces arranged so that the mold frame, each with an end wall on one of the two pressing surfaces and with the other end wall on the other mold frame.
  • Plan milled surfaces are of advantage here, since on the one hand an exact alignment of the mold frame with respect.
  • the pressing surfaces and on the other hand a transfer of pressure forces on Ensure the entire surface of the end walls.
  • the two form of the frame adjacent end walls are flat against each other, so that they are well sealed with or without sealing element.
  • the wall parts are not formed with steam channels to supply steam to the mold cavity. As a result, no back cover of the wall side is necessary, which greatly simplifies the production of the wall parts of the mold wall.
  • steam channels may be integrated in the wall part, which are lined in particular with silicone hoses.
  • the silicone hoses are preferably perforated on the side facing the mold cavity, so that the steam can escape into the mold cavity.
  • the inner wall here has corresponding passage openings.
  • a mold for a device for producing foamed particle foams which delimits a mold cavity and has a mold frame and at least one mold plate movable with respect to the mold frame.
  • the mold plate is made of a thin inner wall, an adjacent hollow chamber structure, in which steam channels are formed, wherein on the side facing away from the inner wall side of the hollow chamber structure, a stiffening structure is provided.
  • the stiffening structure is arranged outside the Holkam mer Modell.
  • the stiffening structure has no Dam fkanäle on.
  • the stiffening structure provides strength to the mold plate, but is not heated or cooled in the temperature cycles as much as the hollow chamber structure.
  • the heat capacity which must be heated or cooled in the temperature cycles, essentially determined only by the hollow chamber structure and the inner wall.
  • the hollow chamber structure only has to transmit the pressure forces from the inner wall to the stiffening structure.
  • the rigidity of the mold plate is essentially caused by the stiffening structure. Therefore, the hollow chamber structure may be formed thin-walled, which in turn keeps the heat capacity low.
  • the thin inner wall of the mold plate is formed with a thickness of at most 3 mm, preferably at most 2.5 mm and in particular at most 2 mm.
  • the inner wall has steam passage openings and the steam channels of the hollow chamber structure are provided with a connection for connecting a steam supply line.
  • the hollow chamber structure may have at least one connection for connecting a condensate discharge line.
  • a mold for a device for producing particle foam bodies is provided.
  • the mold limits a mold cavity and has a mold frame and at least one mold plate.
  • the mold plate has a thin inner wall and an adjacent hollow chamber structure in which steam channels are formed.
  • the hollow chamber structure has lamellae which extend away from the inner wall. Non-vertically extending fins are inclined downwardly away from the inner wall, so that condensate accumulating on the fins flows away from the inner wall of the mold plate. This ensures that no condensation collects adjacent to the inner wall of the mold plate, which would cool the inner wall locally and would affect the welding and sintering of foam particles in the mold cavity.
  • the inclined blades of the hollow chamber structure are provided with through openings.
  • passage openings are arranged so that condensation water runs down through the passage opening. The condensed water can be removed with a suction device from the hollow chamber structure.
  • a mold for a device for producing particle foam bodies.
  • the mold limits a mold cavity.
  • the mold has a mold frame and a mold plate.
  • the mold plate is movably arranged with respect to the mold frame.
  • the mold plate is provided with a peripheral sealing member to seal the mold plate to the mold frame.
  • the sealing element is designed as an inflatable tube. To move the mold plate, air or gas is discharged from the hose so that the mold plate is free to move relative to the mold frame. If the mold plate is correctly positioned, the tube is inflated with air or other gas, whereby the mold plate is sealed relative to the mold frame.
  • the hose preferably has rubber-elastic corner pieces at the corner regions of the mold plate which seal the corner regions of the mold plate with respect to the regions of the mold frame.
  • a mold for the apparatus for producing particle foam bodies limits a mold cavity.
  • the molding tool is characterized by a hollow channel formed on the inner wall on the side facing away from the mold cavity.
  • the hollow channel is lined with a plastic tube. In the region of the hollow channel extending through the inner wall and on the adjacent wall of the plastic tube vapor passage openings are formed.
  • the hollow channel may be formed in a mold plate and / or in a mold frame.
  • the plastic hose may be a silicone hose, but other plastics that are temperature resistant to conduct steam may be used.
  • the molding tool is formed from two mold frames and two movable mold plates, with one mold plate each being arranged in a mold frame.
  • one mold plate is locally fixed in a mold frame.
  • FIG. 1 shows schematically an apparatus for producing particle foam bodies with a molding tool according to the invention
  • Figure 2 shows a mold frame of a mold according to the invention in perspective
  • FIG. 3 shows the mold frame from FIG. 2, wherein individual frame parts of the mold frame are represented sepa rat,
  • FIG. 4 shows the mold frame from FIG. 2 in a cross-sectional view
  • FIG. 6 shows the mold plate from FIG. 5 in an exploded view
  • FIG. 8 shows a sectional view of the mold plate from FIG. 5 in an enlarged illustration with a thin inner wall, an adjacent hollow chamber structure and a reinforcing structure, FIG.
  • Figure 9a-d a hollow chamber structure for a mold plate with inclined blades in different views
  • Figure 10a, b schematically a sealing element for sealing a mold plate against a mold frame.
  • a device 1 for producing particle foam bodies has two mold halves, which are each represented by a molding tool 2 (FIG. 1).
  • the molds 2 are arranged in a press device with two press frames 3, 4 such that the molds 2 are compressed by means of the press device in a closed position, so that the two molds 2 together define a mold cavity.
  • the pressing frames 3, 4 are moved apart, so that the two molds 2 are spaced apart.
  • the molds 2 can be removed from a particle foam body produced therein.
  • At least one of the pressing frame 4 is slidably mounted and by means of an actuating mechanism 5, the z. B. is designed as a hydraulic cylinder, actuated.
  • the press frames 3, 4, the actuating mechanism 5, guide rods 6 for guiding the press frames 3, 4 are arranged in a rigid housing frame, which is formed of rigid steel beams.
  • At least one of the two molds 2 is provided with a filling tube 7, which is connected via a line 8 to a material reservoir 9.
  • the line 8 is designed to supply foam particles from the material reservoir 9.
  • the foam particles are conveyed to the filling tube 7 with the addition of compressed air. If the material from which the foam particles are formed, has high adhesion forces, such. B. expanded thermoplastic polyurethane (eTPU), then it may also be appropriate to supply in addition to the compressed air and steam to the line 8 to avoid sticking of the foam particles on the transport path from the material reservoir 9 to the filling tube 7.
  • eTPU expanded thermoplastic polyurethane
  • the two molds 2 are each provided with at least one steam supply line 1 0 and at least one Kondensatab2020 Gustav 1 1.
  • the steam supply lines 10 are connected to a steam generator (not shown).
  • the Kondensatab2009 effeten 1 1 are connected to a vacuum pump (not shown).
  • the molding tools 2 are each formed from a mold frame 12 and a mold plate 13 movably arranged within the respective mold frame 12.
  • the mold frames 12 form a peripheral frame which defines a constant cross-sectional area with its inner surface.
  • the mold plates 13 are plates which in plan view approximately have the shape bounded by the mold frame 12.
  • a sealing element 33 is arranged in each case circumferentially, which is formed from an inflatable tube is (Figure 10a).
  • the inflatable tube has at the corner areas on the outside approximately triangular solid rubber parts 34 which are vulcanised onto the tube (FIG. 10b). These triangular-shaped sealing parts 34 fill the inner corners of the mold frame 12 when the hose is inflated.
  • the sealing element 33 is connected to a compressed air device for automatic inflation and deflation of the hose.
  • a displacement device For moving the mold plates 13 in the form of frame 12, a displacement device is provided in each case.
  • the displacement devices have a plurality of push rods (not shown) which have a spindle drive in order to move the mold plate 13 coupled to the push rods.
  • the mold plates 13 are provided with spring-loaded ejection bars 14.
  • the ejection bars 14 When moving back one half of the mold 2 by means of the actuating mechanism 5, the ejection bars 14 abut a baffle plate (not shown). As a result, the ejector rods 14 are pressed with bearing in the mold plate 13 ends through the mold plate 13 and eject a formed in the mold particle foam part.
  • FIG. 2 to 4b An embodiment of such a mold frame is shown in Figures 2 to 4b.
  • the mold frame has a thin inner wall 15, which is formed with a thickness of 1 mm to 3 mm. From the edges of the inner wall extending radially outward end walls 16.
  • the end walls 16 are stiffer than the inner walls formed. In the present embodiment, the end walls 16 have a thickness of 10 to 12 mm.
  • the honeycomb structure 17 has rectangular honeycombs, which are formed from thin-walled, mutually orthogonal sheet metal strip.
  • the mold frame 12 has a rectangular shape in the front view, which is formed from four frame parts 18. Each frame part is formed from a strip-shaped, planar inner wall section, two Stirnwandungsabroughen and a corresponding portion of the honeycomb structure ( Figure 3).
  • the inner wall 15 has small holes 19, in which on the honeycomb structure 17 molded positioning pins are inserted.
  • the honeycomb structure 17 is thus connected to the inner wall 15 with a plug connection.
  • the individual frame parts 18 are assembled separately from the respective inner wall sections, the sections of the honeycomb structure and the Stirnwandungsabêten.
  • the individual elements can be welded together. Preferably, they are connected to one another with individual spot welds.
  • the individual frame parts 18 are then directed separately. Only then are they put together and linked together. Preferably, they are joined together by welding.
  • laser welding is suitable because a laser weld is very thin and causes little distortion.
  • the end walls 16 are made of rigid sheet metal strips, in particular sheet steel strips, they contribute substantially to the stability of the entire mold frame 12. In particular, they prevent that the frame parts 18 in the manufacture or that the entire mold frame 12 warps. At least they ensure that the delays are small, so that they can be directed to the mold frame 12 after assembly of the individual frame parts 18. Due to the thickness of the end walls 1 6, it is possible to plan to mill them and so align the surfaces of the end walls with respect to the inner surfaces of the inner walls exactly perpendicular to each other.
  • the mold frame 12 has no steam channels for supplying steam into the mold cavity. This significantly simplifies the manufacture of the mold frame 12 and reduces the risk of distortion since no tight chambers are necessary to confine the steam channels.
  • Figure 4a shows an embodiment of the mold frame in cross-section, which has no filling tube.
  • Figure 4b shows a similar cross-sectional view of another embodiment of the mold frame, which is provided with a filling tube 7, which can be connected via a line 8 to the material reservoir 9.
  • the filling tube 7 opens through a corresponding opening 20 on the inner wall 15 at the inner region of the mold frame 12, with which a portion of the mold cavity is limited.
  • the thin-walled inner wall 15 defines a portion of the mold cavity.
  • the inner wall has a low heat capacity in comparison with a thick wall, and as a result draws little heat from the mold during heating.
  • the end walls 16 have a much greater specific heat capacity than the inner wall 15. Since the end walls 16 are connected to the inner wall 15 only with their end faces. are coupled, the thermal connection to the mold cavity is low, so that the heat capacity of the end walls 16 affect neither the heating nor the cooling of the mold cavity significantly.
  • the end walls 16 of the mold frame 12 Due to the high rigidity of the end walls 16 of the mold frame 12 has a high rigidity, which reduces the risk of distortion. In addition, in minor distortions by face milling or surface grinding of the surfaces of the end walls 16, the outer surfaces of the end walls 16 and the inner surface of the inner wall 15 are aligned exactly orthogonal to each other. This allows for correcting the surfaces after final assembly of all elements of the mold frame 12.
  • the relatively thick end walls 1 6 also allow the introduction of a groove (not shown) for receiving a sealing element. It may be expedient to provide a circumferential sealing element 21 (FIG. 1) on at least one of the two end walls, which lie against each other in the closed state of the molding tools 2.
  • the sealing element is preferably a silicone seal.
  • FIG. 4c Another embodiment of a mold frame 12 ( Figure 4c) is provided with a circumferential steam channel 35.
  • this mold frame 12 is the same as the above-explained mold frame 12 is formed.
  • the steam channel 35 is bounded by the inner wall 15, a sheet metal strip or a lamella 36 of the honeycomb structure and two additionally arranged sheet metal strips 37, 38.
  • the metal strips 37, 38 are fixed with a few weld points on the inner wall 15 and on the blade 36 and with each other. The thus limited channel is not tight, so is located on the inner surfaces of the sheet metal strips 37, 38, the blade 36 of the inner wall 15, which limit the steam channel, a tubular silicone lining 39 which seals the steam channel 35.
  • Self-aligned through-openings 40 are formed in the silicone lining 39 on the section lying in the inner wall 15 and on the inner wall 15, through which vapor can escape from the steam channel 35 into the mold cavity bounded by the mold frame 12.
  • the silicone lining 39 makes it possible to connect the metal parts 15, 36, 37 and 39 in a non-tight manner, since due to the silicone lining 39 an inadvertent escape of the steam from the steam channel 35 is reliably avoided.
  • a non-tight connection of the metal parts 15, 36, 37, 38 requires only a few, small welds that cause no distortion on the mold frame 12.
  • the mold plate 13 ( Figure 5 to Figure 8) has a thin inner wall 22.
  • the inner wall is formed with a thickness of 1 to 3 mm.
  • a hollow chamber structure 23 is formed on the outside of the inner wall 22 .
  • the hollow chamber structure 23 similar to the honeycomb structure 17 of the mold frame 12, is formed by means of thin-walled strip-shaped metal sheets. Mige honeycombs.
  • the hollow-chamber structure 23 is closed substantially gas-tight with a front-side circumferential side wall 24 and a rear wall 25 arranged on the opposite side to the inner wall 22.
  • the rear wall 25 extends in the peripheral region of the hollow chamber structure 23 a piece in the direction of the inner wall 22.
  • the side wall 24 over the entire height of the hollow chamber structure 23 or also a piece inward over the rear region extends.
  • substantially gas-tight is expressed that the hollow chamber structure is not formed absolutely tight, because the inner wall 22 of the mold plate 13 has steam passage openings, so that steam from the Hohlkam- mer MUST 23 can be introduced through the inner wall 22 in the mold cavity.
  • the rear wall 25 has connections 26 for connecting steam supply lines 27 and condensate discharge lines 28.
  • Through holes 30 are provided in the metal strips 29 delimiting the honeycombs of the hollow chamber structure 23, so that a plurality of honeycombs are connected to steam channels along which the steam supplied via the steam supply lines 27 can be distributed in the hollow chamber structure 23.
  • free channels 40 are formed in the hollow chamber structure 23, which are free of metal strips of the hollow chamber structure 23.
  • the free channels 40 extend over almost the entire longitudinal direction and almost the entire transverse direction of the mold plate 13.
  • the Dampfzu beanstechnisch 27 and the KondensatabDOM technisch 28 open directly to the free channels 40.
  • a steam supply line 27 and a Kondensatabfuel threaten 28 to a common Connection piece 40 is connected, from which a short line section 42 leads to an opening 43 of the rear wall 25.
  • the openings 43 are disposed adjacent to the free channels 40.
  • the hollow chamber structure 23 is essentially formed from thin-walled metal sheets, wherein the rear wall 25, the side wall 24, the inner wall 22 and the sheet metal strips 29 have a thickness of not more than 3 mm, preferably not more than 2.5 mm and in particular not more than 2 mm have.
  • the height of the hollow chamber structure 23, ie the distance between the inner wall 22 and the rear wall 25 is not more than 5 cm, preferably not more than 4 cm and in particular not more than 3 cm.
  • the hollow-chamber structure 23 is thus a relatively thin honeycomb element which itself has no high rigidity. Therefore, a stiffening structure 31 is arranged on the side facing away from the inner wall 22 of the hollow chamber structure 23.
  • the stiffening structure 31 is a framework of thick metal strips 32, which are arranged longitudinally and transversely to each other, so that they form a rectangular grid. The individual metal strips are perpendicular to the plane the inner wall 22 is arranged. The longitudinal and transverse metal strips are joined together by welding or soldering to form an integral stiffening structure 31.
  • the vertical arrangement of the metal strips 32 with respect to the inner wall 22 and the rear wall 25 causes on the one hand a very high bending stiffness against bending of the hollow chamber structure 23 transversely to the plane of the inner wall 22 and on the other hand are the metal strips 32 only with their end faces on the rear wall 25, so the contact surface and thus the heat transfer from the rear wall 25 to the stiffening structure 31 is very low.
  • the mold plate 1 3 extends over an area of z. B. 60 cm x 120 cm or 50 cm x 100 cm or 60 cm x 125 cm. With this size of the mold plate 13, the mass of the stiffening structure 31 is about 25 kg.
  • the mass of the hollow chamber structure 23 including the rear wall 25 and the inner wall 22 is about 2 kg.
  • the impairment due to the heat capacity of the mold plate 13 is very low.
  • a highly rigid stiffening structure 31 is provided, which is not heated and cooled substantially during the temperature cycles.
  • the mold plate 13 thus has on the one hand a high strength and on the other hand only a small heat capacity, which comes into contact with the guided to ⁇ steam.
  • the hollow chamber structure 23 therefore preferably has a mass which is not more than 30%, in particular not more than 20% and preferably not more than 15% of the mass of the entire mold plate 13 including the stiffening structure.
  • attachment points 44 are provided for securing the push rods.
  • FIGS. 9a to 9d show a further embodiment of the hollow-chamber structure 23 of the forming plate 13.
  • the hollow-chamber structure 23 is formed like a honeycomb from horizontal metal strips or lamellae 45 and vertical metal strip or lamellae 46.
  • the horizontal slats 45 are inclined relative to a plane perpendicular to the inner wall 22 by the angle ⁇ arranged ( Figure 9d).
  • the inclination is formed such that the horizontal slats 45 hang from the inner wall 22 of the mold plate 13 slightly downwards. In this way, water, which is formed by condensing steam in the hollow chamber structure 33, directed away from the inner wall 22 of the mold plate 13.
  • openings 47 At the edge of the horizontal lamellae 45 remote from the inner wall 22, openings 47 (FIG.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Molding Of Porous Articles (AREA)

Abstract

L'invention concerne un moule destiné à un dispositif de fabrication de corps en mousse de particules. Le moule délimite une cavité de moule. Le moule comprend un cadre de moule (12) et au moins une plaque de moule (13) mobile par rapport au cadre de moule. Le cadre de moule est caractérisé en ce qu'il comprend des parois d'extrémité (16) qui sont plus rigides que la paroi intérieure (15) dirigée vers la cavité de moule. Selon un autre aspect de la présente invention, la plaque de moule comporte une structure de renforcement qui est formée indépendamment d'une structure à chambres creuses (23) de la plaque de moule. De la vapeur est passée exclusivement à travers la structure à chambres creuses de la plaque de moule. En outre, des lamelles (45) de la structure à chambres creuses peuvent être disposées de façon inclinée de sorte que de la vapeur de condensation se formant dans la structure à chambres creuses s'écoule de la paroi intérieure de la plaque de moule. Un autre aspect est caractérisé par un élément d'étanchéité (33) qui entoure la plaque de moule. Cet élément d'étanchéité est réalisé sous la forme d'un tuyau gonflable.
EP16738723.2A 2015-07-24 2016-07-08 Moule Withdrawn EP3325245A1 (fr)

Applications Claiming Priority (2)

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DE102017123796B4 (de) * 2017-10-12 2019-07-04 Werkzeugbau Siegfried Hofmann Gmbh Werkzeug
CN109849253A (zh) * 2018-11-15 2019-06-07 张艳琛 一种热成型冷定型设备快速加热板
KR102345577B1 (ko) * 2019-06-10 2022-03-02 주식회사 지브이티 건축용 조립식판넬의 금형장치 및 이에 의한 조립식판넬
DE102019126695A1 (de) * 2019-10-02 2021-04-08 Werkzeugbau Siegfried Hofmann Gmbh Vorrichtung zum Verarbeiten eines Partikelschaummaterials zum Herstellen eines Partikelschaumformteils
EP3808526A1 (fr) 2019-10-16 2021-04-21 Storopack Hans Reichenecker GmbH Presse de moulage et procédé de production de pièces moulées
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PT118263A (pt) * 2022-10-18 2024-04-18 Olmedo Tejedor Lda Molde para moldagem de peças em material termoplástico

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KR101896980B1 (ko) 2018-09-10
WO2017016845A1 (fr) 2017-02-02

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