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
  • B29C33/00—Moulds or cores; Details thereof or accessories therefor
  • B29C33/30—Mounting, exchanging or centering
  • B29C33/303—Mounting, exchanging or centering centering mould parts or halves, e.g. during mounting
• • 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
  • B29C33/303—Mounting, exchanging or centering centering mould parts or halves, e.g. during mounting
  • B29C33/304—Mounting, exchanging or centering centering mould parts or halves, e.g. during mounting centering cores
• • 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
  • B29C33/306—Exchangeable mould parts, e.g. cassette moulds, mould inserts
• • 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
  • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
  • B29C45/17—Component parts, details or accessories; Auxiliary operations
  • B29C45/26—Moulds
  • B29C45/2602—Mould construction elements
  • B29C45/2606—Guiding or centering 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
  • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
  • B29C45/17—Component parts, details or accessories; Auxiliary operations
  • B29C45/26—Moulds
  • B29C45/2673—Moulds with exchangeable mould parts, e.g. cassette 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
  • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
  • B29C45/17—Component parts, details or accessories; Auxiliary operations
  • B29C45/26—Moulds
  • B29C45/2673—Moulds with exchangeable mould parts, e.g. cassette moulds
  • B29C45/2675—Mounting of exchangeable mould inserts
• • 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
  • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
  • B29C45/17—Component parts, details or accessories; Auxiliary operations
  • B29C45/72—Heating or cooling
  • B29C45/73—Heating or cooling of the mould

Definitions

• the invention relates to a molding tool, in particular a casting tool for the production of molded parts.
• the guide arrangements are designed as axial guides, which are each arranged on the edge side of the cavity and opposite and distanced from each other.
• the mold insert is lifted over the guide assemblies in the axial direction of the tool support member, so as to form an air gap between the tool support member and the mold insert.
• the heating of the mold insert takes place.
• the tool support part can be cooled.
• the mold inserts are applied to the tool support parts and there is the injection process. It could not be achieved in all applications, an exact alignment and tuning of the mold inserts at high temperature differences.
• the present invention has for its object to provide a mold with which very high manufacturing accuracies in the molded parts to be produced can be achieved even at high temperature differences between the tool support parts and the mold inserts.
• this can also be an exact mutual coordination of the mold inserts to each other, as this can still be done in a relatively cold state.
• the temperature-related dimensional deviations can be taken into account with regard to shape, so that even in the subsequent operating case at high temperatures of the mold insert and the temperature differences between the mold insert and the tool support parts a very high manufacturing accuracy for the molded parts to be produced can be achieved.
• the inclined orientation is mainly due to the heat-related, different change in length between the mold insert and the tool support member, in particular the centering of the further centering advantageous. In this way, an exact, linear guidance parallel to the centering surfaces of the further centering arrangement can be made possible.
• the insulating layer can be tuned purely for their insulating effect and therefore does not have to assume any supporting functions.
• an insulating layer formed mostly from air can be built up by this clearance or gap due to the selected game.
• a heat transfer between the mold insert and the tool support member can be reduced here as well.
• an exclusive support to the contact surfaces can be done all around a complete release of the mold inserts on the tool support parts.
• an embodiment according to claim 12 proves advantageous because thereby the hanger can be performed in a spatial distance from the respective mold insert and a direct heat transfer reduced or for the most part can be avoided at all.
• an exact positioning and alignment of the mandrel is created on the respective mold insert part. This is done in conjunction with the otherwise rather more floating storage or mounting of the mold core on the holding bracket but an exact, relative positioning of the mold core with respect to the mold inserts or parts.
• the clamping device with additional, additional positioning or straightening surfaces between the mandrel and the mold inserts or these exact, positionally accurate arrangement and alignment of the mandrel is created with respect to the cavity.
• an embodiment according to claim 14 is also advantageous since in this way the mold core can be tempered exactly according to the selected operating mode or the requirements required for it. This can range from heating to cooling of the mold core.
• an embodiment as described in claim 15 possible because even with low flow rates a permanent Temperierstoffnikank can be maintained in the region of the mold core. Thus, the tempering result in terms of heating and / or cooling can be better and faster adapted to the particular operating case.
• FIG. 1 shows a machine with a mold for the production of moldings in the casting process, in side view
• FIG. 5 shows a partial region of the entire mold in the closed working position, cut in view, according to the lines V-V in Figure 3;
• Fig. 6 the further, arranged peripherally arranged centering arrangement in side view, according to the lines Vl-Vl in Fig. 5;
• FIG. 7 shows an enlarged portion of the nozzle-side part of the mold with a mold core, in the region of the mold parting plane, in section.
• a machine 1 is shown in a simplified manner, with which a wide variety of molded parts can be produced.
• it is an injection molding machine 2, with which the molding or parts can be produced by injection molding.
• machine 1 a system suitable for metal casting, in which, for example, low-melting metal alloys can be used as the casting material.
• a mold 3 which may be, for example, hollow body, hollow sections, fittings, sleeves, branches, nipples, elbows, tees, caps or the like.
• all known materials that can be processed by this method can be used as materials. These are preferably plastics or alternative materials that can be processed by injection molding. In both methods, the primary forming operation is preferably selected.
• the mold 3 is to be formed, for example, for a die casting process.
• low-melting metal alloys aluminum and aluminum alloys, tin die-cast alloys, magnesium and magnesium alloys, zinc and zinc alloys, copper and copper alloys, lead alloys and copper-tin casting alloys and their possible combinations with one another.
• the injection molding machine 2 shown here comprises a plasticizing unit 4 and a closing unit 5 in a known manner.
• the molding tool 3 is held or received in the closing unit 5 and may in turn comprise a nozzle-side tool-carrying part 6 and an ejector-side tool-carrying part 7.
• the two tool-carrying parts 6, 7 can in turn be formed from several tool plates or elements.
• the two tool-carrying parts 6, 7 are preferably adjustable from a working position into a mutually spaced-apart release position in a single mold parting plane 8 running between them.
• At least one mold insert 9, which is divisible into mold insert parts 10, 11, is arranged inside or on the two tool support parts 6, 7.
• each of the mold inserts 10, 11 may be held on one of the tool support members 6, 7, respectively.
• the associated mold inserts 10, 11 form at sides facing each other in the closed working position at least one cavity 12, which serves for molding and forming the at least one molded part.
• both the tool-carrying parts 6, 7 and the mold inserts 10, 11 are divisible in the same mold parting plane 8.
• the raw material provided for production is received in a storage container 13 and subsequently supplied to a plasticizing screw, not specified in any more detail.
• the reservoir 13 may for example be connected via a supply line not shown with a storage silo from which the raw material is taken.
• a tool clamping plate 14 is shown in simplified form, on which the nozzle-side tool-carrying part 6 can be fastened.
• the further ejector-side tool-carrying part 7 can be arranged and held on an adjustably guided tool-holding plate 15.
• the closing unit 5 makes it possible, by means of the closing unit 5, the two tool-carrying parts 6, 7 together with the mold insert parts 10, 11 arranged and held relative to each other to move relative to one another so as to selectively perform an opening movement and closing movement.
• the two tool-carrying parts 6, 7 and the mold inserts 10, 11 can be distanced from one another in the region of the mold parting plane 8 so as to be able to remove or remove the mold part (s) produced from the cavity or cavities 12.
• the injection molding machine 2 in the region of its plasticizing unit 4 may comprise its own traction drive 16 with which the plasticizing unit 4 can be adjusted relative to the tool clamping plate 14.
• the plasticizing unit 4 and the closing unit 5 are constructed on a machine bed 17 or arranged thereon.
• the machine bed 17 serves as a load-bearing basic construction of the injection molding machine 2, which is supported on a mostly flat footprint, such as e.g. superimposed on a hall floor.
• the plasticizing unit 4 in particular the end of the plasticizing screw, is brought into contact with the tool clamping plate 14 by means of the traction drive 16, whereby the material processed in the plasticizing unit 4 is introduced into the cavity 12 via a sprue system 18 arranged in the nozzle-side tool-carrying part 6 can.
• the sprue system 18 can also extend into the tool clamping plate 14 in order to achieve a sealing flow connection between the end of the plasticizing unit 4 and the cavity 12.
• the sprue system 18 may in turn have at least one sprue 19. It is possible, one or more sprue channels 19 to provide which or which, starting from a gate opening 20 arranged in the nozzle-side tool support part 6, extends or extend to at least one gate 21 opening into the cavity 12. Under bleed
• 21 is understood to mean that region in the mold 3 in which the sprue 19 opens into the cavity 12.
• the cavity 12 has only been indicated schematically, wherein the representation of units for adjusting cores, as required for the production of hollow bodies, has also been omitted here.
• this can also be a separate control device
• the mold insert 9 worked can be provided at the side facing away from the mold parting plane 8 sides of the tool support parts also additional insulating in the form of insulating, so as to provide a radiation of To reduce heat during the manufacturing process towards the plasticizing unit 4.
• the mold 3 is shown in different views and detailed representation, again with the same parts the same reference numerals or component designations as in the previous Fig. 1 are used.
• the tool-supporting parts 6, 7 serve to receive and support the dimensionally and also massively smaller shaped insert parts 10, 11.
• a thermal separation or insulation between the tool-carrying parts 6, 7 and the mold insert parts 10, 11 arranged thereon and held better can also be better.
• the mold inserts 10, 11 are used to shape the produced, but unspecified molded parts, wherein this takes place in the cavity or cavities 12 provided therefor.
• This molding tool 3 is a so-called high-temperature tool, in which the material to be molded is processed in the region of the mold inserts 10, 11 due to the strength properties of the molding to be achieved, the surface quality and dimensional accuracy with the smallest tolerances in a temperature range up to 400 ° C becomes.
• These are, for example, materials from the group of polysulfone (PSU), polyphenylsulfone (PPSU), polyetheretherketone (PEEK), and other high-temperature materials.
• This mold 3 can also be used for the processing of various engineering plastics such. Polyvinylidene fluoride (PVDF), polyethylene (PE), polypropylene (PP), polyamide (PA), acrylonitrile-butadiene styrene (ABS) or the like.
• the tool-carrying parts 6, 7 are held at a lower temperature, for example in a temperature range between 40 ° C and 100 ° C, in particular 50 ° C and 80 ° C.
• corresponding temperature control devices such as cooling channels and / or heating channels or the like, are arranged in the tool support parts 6, 7, through which a temperature control medium can be passed.
• a liquid tempering medium for example water, thermal oil or the like can preferably be used. But it would also be an electrically operated temperature control conceivable. It will be necessary at the beginning of the injection process, the tool support parts 6, 7 to the corresponding To warm up to operating temperature.
• thermocouples By means of a temperature control, such as thermocouples, then the respective tool support temperature can be determined and heated in a corresponding manner the tool support parts 6, 7 supplied temperature control and / or cooled.
• a temperature control such as thermocouples
• the temperature control in dependence on the determined actual value of the temperature to bring to the predetermined target value .. This can be done by supplying or removing heat.
• the mold insert 9 with its mold insert parts 10, 11 is moved to a tool support parts 6, 7 to much higher temperature depending on the material to be processed. Because of this high temperature difference, there are also different length expansions between the tool-carrying parts 6, 7 and the mold insert parts 10, 11 arranged and held thereon.
• the first centering arrangement 23 is preferably arranged approximately in a surface center of a contact surface 25, 26 of the respective mold insert part 10, 11 facing the tool support part 6, 7. With this arrangement, depending on the necessary change in length, the respective mold insert part 10, 1 can expand unhindered starting from this central centering arrangement 23.
• At least an additional, further centering arrangement 24 is arranged approximately in an edge-side peripheral region of the respective mold insert part 10, 11 and serves for the exact alignment of the respective mold insert part 10, 11 relative With respect to the respective tool-carrying part 6, 7, an exact, relative positioning of the respective mold inserts 10, 11 with respect to the tool-carrying parts 6, 7 is achieved via the two centering arrangements 23, 24 cooperating here. With these two centering arrangements 23, 24 already two degrees of freedom of the mold inserts 10, 11 can be taken.
• the first centering arrangement 23 is formed by cooperating, first centering elements 27, 28. These centering elements 27, 28 in turn each comprise cooperating, frusto-conical first and second centering surfaces 29, 30.
• the first centering element 27 is formed as a frustoconical, projecting component, which projects into a recess of the same shape in the mold insert 10, 11.
• the frusto-conical centering surfaces 29, 30 define a centering axis 31. Due to the frusto-conical shaped first and second centering surfaces 29, 30 is a centered orientation of the respective mold insert part 10, 11 with respect to the centering. 3 This still allows a rotational movement of the respective mold insert part 10, 11 with respect to the tool-carrying part 6, 7. This and the second degree of freedom in a parallel direction with respect to the mold parting plane 8 are taken by the further centering arrangement 24.
• FIG. 4 One possible embodiment can be seen in FIG. 4.
• the third degree of freedom in the vertical direction with respect to the mold parting plane 8 is taken through this system.
• a lifting of the contact surface 25, 26 from the respective tool support member 6, 7 can be prevented by holding or fastening means.
• Abstützung own support members 32 may be provided between the contact surface 25, 26 and the tool support members 6, 7. These can have a much smaller proportion than the surface area of the respective contact surface 25, 26.
• the mold insert 10, 11 with its contact surface 25, 26 with the interposition of preferably several such support members 32 in the vertical direction with respect to the mold parting plane 8 on the tool support part 6, 7th be positioned supported.
• the support member or members 32 serve to support the mold insert 10, 11 positioned at a predetermined distance from the respective tool support member 6, 7. This distance serves to ensure that between the contact surface 25, 26 of the mold insert 10, 11 and the tool support member 6, 7 a separate insulating layer 33 can be formed.
• the insulating layer 33 may be formed, for example, as an air gap or else by a separate insulating.
• the insulating layer 33 serves to achieve a thermal separation between the mold insert part 10, 11, which has a higher temperature during operation, and the tool support part 6, 7. A fixed support of the mold insert 10, 11 via the or the support members 32 on the tool support member 6, 7th
• This further centering arrangement 24 comprises further centering elements 34, 35, these third and fourth centering surfaces 36, 37 comprising.
• the centering surfaces 36, 37 are formed here planar. Preferably, these may also be aligned in a wedge shape tapering.
• the centering surfaces 36, 37 are aligned approximately in a parallel direction or longitudinal extent with respect to a center plane 38 extending perpendicular to the mold parting plane 8 and through the center of the surface of the contact surface 25, 26. This results in a clear positioning or alignment of the individual mold insert parts 10, 11 to the tool support parts 6, 7 to each other.
• the first centering arrangement 23 with its preferably frusto-conical, opposite to each other formed centering elements 27, 28 in the region of Center center of the contact surface 25, 26 positions the mold insert 10, 11 relative to the centering axis 31.
• the centering axis 31 extends in a vertical orientation with respect to the mold parting plane 8 and approximately in the center of area of the contact surface 25, 26th
• the further centering arrangement 24 with the parallel longitudinal course of the centering surfaces 36, 37 allows a relative unhindered movement or a linear expansion of the mold insert 10, 11 in the direction of the centering plane 38 relative to the centering element 34.
• a longitudinal extent in the same plane and in the vertical direction is also starting from the central positioning in the region of the first centering 23 unhindered possible.
• the centering elements 27, 34 each held stationary on the tool-carrying parts 6, 7 and secured thereto.
• the cooperating, formed as recesses further centering elements 28 and 35 are provided in the mold inserts 10, 11. Regardless of this, it would also be possible to provide the stationary arrangement of the centering elements 27, 34 on the mold insert parts 10, 11 and the further centering elements 28 or 35 in the tool carrying parts 6, 7 which are designed as recesses.
• the third and fourth centering surfaces 36, 37 of the further centering elements 34, 35 extend as seen in cross section with respect to the centering plane 38, inclined relative to one another.
• the mold insert 10, 11 is positioned with a circumferential or a circumferential play on the respective tool-carrying part 6, 7 or held thereto. This makes it possible that an unimpeded longitudinal expansion of the mold insert 10, 11 relative to the tool support member 6, 7 can be carried out starting from the central centering assembly 23.
• these two tool-carrying parts 6, 7 are preferably kept at the same temperature level with respect to one another, they can be roughly guided relative to one another and aligned in the working position with respect to one another.
• these guides 39 may be formed by guide rods, preferably circular guides, and cooperating guide receptacles. These cooperating guides 39 can be engaged with each other both in the working position and in the spaced-apart release position of the tool support parts 6, 7.
• additional positioning devices 40 can be provided which, at least in the working position, align the two tool-carrying parts 6, 7 with respect to one another.
• the positioning devices 40 may be formed by frustoconical and cooperating positioning.
• one of the positioning elements is formed as a component projecting beyond the tool support part 6, 7 and the further positioning element as a recess of the same shape in the tool support part 6, 7.
• a first alignment or positioning of the two tool-carrying parts 6, 7 to each other already take place.
• these can be aligned with each other over at least in their working position engaged and cooperating positioning elements 41, 42.
• the positioning element 41 may be designed as a frusto-conical recess and the further positioning element 42 on the ejector-side mold insert part 11 as a frusto-conical projection.
• These positioning elements 41, 42 are preferably provided several times between the mold insert parts 10, 11. A mostly diametrically opposite arrangement has been found to be advantageous.
• At least one mold core 43 is to be provided in the region of the mold parting plane 8 for the formation of hollow body-shaped or tubular components.
• the mold core 43 has mutually distanced ends 44, 45, between which a mold core axis 46 extends.
• the at least one mold core 43 projects in the working or closed position with its first end 44 into the cavity 12 formed between the mold insert parts 10, 11. Its further end 45 is preferably held on a retaining block 47 with an axial play.
• the holding block is formed approximately block-shaped.
• the holding block 47 is arranged at a distance therefrom, at least when the mold insert parts 10, 11 are in the working position.
• the distanced from here is a spacing in the region of the outer circumference of the mold inserts 10, 11 understood. This spacing should also be maintained in the working position so as to form at least one air gap for insulation. But it would also be possible in addition to the arrangement of a separate insulating. It should be achieved so that a thermal separation.
• the further end 45 of the mold core 43 can be held with a radial clearance in the vertical direction with respect to the mold core axis 46 on the holding block 47. Thereby, a relative movement of the mandrel 43 with respect to the support bracket 47 in a vertical orientation with respect to the mandrel axis 46 is made possible.
• This radial clearance can be achieved in that the attachment and retention of the mold core 43 on the support bracket 47 in a slot over a sleeve and a passing through this fastening element, such as a screw takes place.
• This radial clearance is mostly made possible in an adjustment plane oriented parallel to the mold parting plane 8.
• the axial clearance between the mold core 43 and the holding block 47 can be achieved for example by an additional, sleeve-shaped element which passes through the holding block 47 and thereby has a longitudinal extent in the direction of the mandrel axis 46, which is greater than a thickness of the holding block 47 in the same spatial direction ,
• a slightly greater distance can be formed between the end 45 of the mold core 43 and, for example, a collar arranged on the sleeve, than the previously described thickness of the holding bracket 47.
• the mold core 43, together with the holding block 47 is guided here via a guide arrangement 48 in the axial direction with respect to the mold core axis 46 on one of the tool support parts 6, 7.
• This adjustment of the mold core 43 together with the holding block 47 is preferably carried out parallel to the mold parting plane 8, wherein this can be done for example in a known manner by a slotted guide in the course of the opening movement of the tool support parts 6, 7.
• adjusting device with its own drive means, such as, for example, To shift piston assemblies, actuators, adjusting nuts or the like for the release and removal of the molding.
• guides eg dovetail guides, T-guides or the like can be used.
• an exact side and / or height guide for the support bracket 47 should be provided.
• the adjusting movement takes place in a rectilinear direction of movement in parallel alignment with respect to the mold parting plane 8.
• the holding block 47 or a guide plate can be opened by means of a releasably releasable holding device in the open position or release order.
• this locked holder is unlocked and there is the adjustment of the support bracket 47 by means of the guide assembly 48 in the working position.
• the mold core 43 In order to position the mold core 43 relative to the mold inserts 10, 11 in the working or closed position exactly positioned in the cavity 12, the mold core 43 is positioned in the region of the mold inserts 10, 11 by means of a clamping device 49 acting in the axial direction with respect to the mold core axis 46 held on at least one of the mold inserts 10, 11.
• the clamping device 49 for example, comprise a clamping wedge 50 with a wedge surface which engages in a recess 51 with a further wedge surface.
• a corresponding positioning stop 52 is provided between at least one of the mold inserts 10, 11 and each of the mold cores 43, so as to position at least the protruding into the cavity 12 end 44 exactly in the axial direction with respect to the mold core axis 46.
• a sealing seat of the mold core 43 on the mold insert parts 10, 11. With the clamping device, a sufficient bias in the axial direction of the mandrel 43 is achieved.
• the game before described in the region of the end 45 on the support bracket 47 is used to compensate for temperature-dimensional changes. The positioning takes place by the interaction of the clamping device 49 with the positioning stop or the 52nd
• the mold core 43 arranged in the region of the mold parting plane 8 can be adjusted in the direction parallel to it and in the direction of its mandrel axis 46 from a position projecting into the cavity 12 into a release position (not shown in detail), as has already been explained above.
• At least two tempering passages 53, 54 which are in fluid communication with each other are provided or arranged.
• these are preferably arranged concentrically or coaxially with one another in the region of the mold core axis 46 and extend into the mold core 43 in the working position into the region of the cavity 12 and thus directly up to the end 44, which extends from the holding fixture 47 averted side of the mold core 43 is arranged.
• the two tempering channels 53, 54 are arranged coaxially with each other in this embodiment due to the small available space. But it would also be a side by side leading arrangement possible.
• the temperature control channel 53 located inside can be designed as a tubular component.
• the tempering medium is guided in the interior of the tube and can thus flow into the region of the end 44.
• the tube-shaped component forming the tempering channel 53 is further inserted into the further tempering channel 54 extending as an opening or recess extending into the region of the end 44.
• a preferably annular gap is formed, which subsequently forms the tempering channel 54.
• the first temperature control channel 53 serves to supply the temperature control medium. This flows within the Due to the fact that the tube-shaped tempering channel 53 is shorter than the further tempering channel 54 extending inside the mandrel 43, the tempering medium supplied via the tempering channel 53 can flow out of it and into the area between the outer sides of the tubular tempering channel 53 and the inside of the tempering channel 54 formed annular gap, starting from the end 44 back to the other end 45 to flow back.
• the two temperature control channels 53, 54 are in the region of the other end 45 of the mold core 43 via a separate feed channel 55 and a discharge channel 56 in fluid communication.
• the flow direction is indicated schematically by arrows and is chosen here so that the supply channel 55 is in flow communication with the first tubular temperature control channel 53.
• the first temperature control channel 53 is in flow communication with the further temperature control channel 54, wherein the return flow takes place via the tempering channel 54 of annular design in cross-section to the discharge channel 56.
• the supply channel 55 is in flow communication with the discharge channel 56 via its own arranged in the mold core 43 circulation line 57.
• control element 58 is formed, for example, by an adjusting screw, which projects laterally into the throughflow cross section of the circulation line 57.
• the circulation line 57 can be opened completely closed up to the completely open flow cross-section.
• the arrangement of the circulation line 57 is selected so that one of the temperature control channels - in the present embodiment, the temperature control 54th - opens for the return flow of the temperature control medium in the circulation line 57.
• the coupling elements 59 are connected directly to the mold core 43 and the feed arranged thereon and discharge channels 55, 56.
• a leak-free coupling possibility is advantageous between the coupling elements 59 and the adjoining Zu and discharges.
• This makes it possible to change and dismantle the entire mold core 43 with the coupling elements 59 connected thereto and to grow another mold core on the holding block, without it being possible for temperature control means to escape, which may possibly lead to contamination of the cavity 12.
• By opening the supply and discharge lines of Temperierstoffnikank always remains closed.
• a simple change for example, the mold inserts 10, 11 and the mandrels 43 of the tool-carrying parts 6, 7 done without it can lead to an outlet of the tempering.
• tempering for example, oils, thermal oils, water, other fluids and / or gases, such. Steam, find application.
• the formation of the temperature control unit for the mold core 43 can also represent an independent, independent invention.
• the object of the invention should be seen in the fact that a temperature of the mold core 43 can be adapted quickly to the respective Bertriebszunot even with minimal space requirements.
• the advantage is that a good and above all rapid temperature adjustment can be performed by the coaxial arrangement of the temperature control channels 53, 54 to each other within the mold core 43 with minimal space requirements.
• each of the mandrels 43 protrude into the cavity 12 so as to be able to shape the component to be produced.
• Each of the mandrels 43 is arranged with its end 45 on a support bracket 47, wherein the demolding and release of the molded part of the molding cores 43 are adjusted together with the or the support brackets 47 and their guide assemblies 48 in the region of the mold parting plane 8 so far that a release of the produced workpiece or molded part from the cavity 12 can take place. This can be done by means of ejector pins.
• the tool support parts 6, 7 and / or the mold inserts 10, 1 and / or the mandrels 43 can be assigned their own sensors as needed, with which the actual temperature can be determined. With a control and monitoring device can then be tempered in accordance with the respective predetermined setpoint the respective temperature control medium or medium.
• the mold insert 9 with its mold inserts 10, 11 circumferentially along the contact surfaces 25, 26 from the respective tool support member 6, 7 be completely released.
• a request then takes place only in the region of the contact surfaces 25, 26 optionally via intermediate formwork of support elements 32 and / or an insulating layer 33 on the respective tool support part 6, 7.
• the embodiments show possible embodiments of the mold 3, wherein the invention is not limited to the specific embodiments illustrated variants thereof, but also various combinations of the individual embodiments are possible with each other and this variation possibility due to the teaching of technical action by objective invention in the ability of this technical Area professional.
• Molded insert 46 Mold core axis
• Gutter channel 54 Temperature control channel

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Manufacturing & Machinery (AREA)
• Moulds For Moulding Plastics Or The Like (AREA)
• Injection Moulding Of Plastics Or The Like (AREA)

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• 2012
  • 2012-06-21 AT AT7032012A patent/AT513057A1/de not_active Application Discontinuation
• 2013
  • 2013-06-21 WO PCT/EP2013/001834 patent/WO2013189608A2/fr not_active Ceased

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