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
  • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
  • B29C43/006—Pressing and sintering powders, granules or fibres
• • 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
  • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
  • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
  • B29C43/04—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles using movable 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
  • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
  • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
  • B29C43/14—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles in several steps
• • 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
  • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
  • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
  • B29C43/18—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles
• • 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
  • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
  • B29C43/32—Component parts, details or accessories; Auxiliary operations
  • B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
• • 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
  • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
  • B29C43/32—Component parts, details or accessories; Auxiliary operations
  • B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
  • B29C43/361—Moulds for making articles of definite length, i.e. discrete articles with pressing members independently movable of the parts for opening or closing the mould, e.g. movable pistons
• • 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
  • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
  • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
  • B29C43/04—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles using movable moulds
  • B29C2043/046—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles using movable moulds travelling between different stations, e.g. feeding, moulding, curing stations
• • 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
  • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
  • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
  • B29C43/14—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles in several steps
  • B29C2043/141—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles in several steps for making single layer articles
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
  • B29L2031/00—Other particular articles
  • B29L2031/16—Frictional elements, e.g. brake or clutch linings
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
  • B29L2031/00—Other particular articles
  • B29L2031/748—Machines or parts thereof not otherwise provided for
  • B29L2031/7482—Brakes

Definitions

• the invention relates to a method for producing friction linings by pressing a pourable mass, the mass being pre-compressed against at least one carrier plate and then the pre-compressed mass being transported to a press where it is subjected to final compression in a mold having at least one cavity, and a device for the production of friction linings by pressing a pourable mass, with a device for pre-compressing the mass against at least one carrier plate and with a press with a mold having at least one cavity for final compression of the mass, the press connecting to the pre-compression device via a conveyor unit.
• Various methods and devices are already known for producing friction or brake linings.
• the pre-compressed mass ie the so-called pre-compact
• the disadvantage here is that the pre-compact is very easily damaged when it is removed from the pre-compression mold and inserted into the final compression mold or when it is transferred between the pre-compression mold and the final compression mold, which Pressling becomes partially unusable or the quality of the finished friction linings is reduced.
• a device or a method for producing friction linings is known, in which case a preform is first produced in a prepress mold, the preform is subsequently transferred to a carrier for transport and then transferred from the carrier to a heated mold for final compression becomes.
• the pre-compact must be removed from the pre-compression mold and placed in a press mold for final compression.
• a similar process for producing friction linings is known from AT 398 726 B, in which the friction lining mass is first precompressed in an intermediate form and then transferred to a press mold for final compression.
• the object of the present invention is to provide a method or a device of the type mentioned at the outset for producing friction linings, damage to the pre-compact being avoided as far as possible and thus ensuring high product quality with inexpensive production of the friction lining.
• the invention provides a method of the type mentioned at the outset, in which it is provided that the pourable mass is already pre-compressed in the press mold and the pre-compressed mass is transported directly to the press in the press mold and is finally compacted there. Due to the pre-compression of the pourable mass already in the mold, in which the mass is subsequently also subjected to the final compression, it is not necessary to transfer the pre-compressed mass, ie the pre-compact, from a pre-compression or intermediate mold to a final compression mold.
• the carrier plates on which the pourable mass is compacted, usually have through holes in order to ensure the strongest possible connection between the friction lining mass and the carrier plate with regard to a shear force load. Since pre-compression of the mass in the actual press mold also results in pre-compression on the carrier plate, any through holes in the carrier plate are already filled with the pourable friction lining mass during pre-compression, which in turn leads to an improved connection of the friction lining to the carrier plate and a particularly homogeneous structure of the finished friction linings.
• the carrier plate (s) and the mold are placed on a base plate before the pourable mass is introduced into the mold become. If a precompression mold is placed on the mold before the pourable mass is introduced into the press mold, there is a sufficiently large cavity for receiving the uncompressed pourable mass before the pourable mass is pre-compressed into the cavity of the press mold. If after the precompression of the pourable mass and before the transport of the mold with the precompacted mass, the precompression mold is lifted from the mold, the mold with the mass precompacted in the cavity of the mold can be easily transported to the press for final compression.
• an efficient feeding and pre-compression of the pourable mass if the pourable mass is introduced into the press mold with the aid of a screw with pre-compression.
• an intermediate layer preferably made of graphite, phenolic resins, metal chips, glass fibers or the like, in particular in the form of a mat, on the carrier plate is applied.
• pourable intermediate layer material is applied to the carrier plate as an intermediate layer before the pourable mass is introduced, and is preferably precompacted.
• a closing plate is placed on the mass precompressed in the press mold. If the pre-compacted mass is subjected to several, preferably independently adjustable, pressing processes for final compression, the desired product quality of the finished friction linings can be ensured in a simple manner via the individual control of the individual pressing processes. If the base plate, the press mold and the closing plate are automatically separated from one another after the friction lining has been completed, a fully automated process for producing the friction linings is created.
• the device of the type mentioned at the outset is characterized in that the pre-compression device has a receptacle for the press mold, and in that the conveyor unit is set up for transporting the press mold with the pre-compressed mass therein and the press for direct final compression of the pre-compressed mass in the press mold ,
• the advantages already mentioned in connection with the method according to the invention result, since the pre-compressed mass does not have to be removed from a separate pre-compression mold and transferred to a compression mold provided for final compression, but rather the pre-compression device has a receptacle for the actual compression mold, so that the provision of a separate prepress mold can be omitted.
• the pre-compression mold can be placed on the press mold in a simple manner before the uncompressed pourable mass is introduced into a cavity formed by the pre-compression mold and the cavity of the press mold.
• different ones can be selected selectively, for example by means of a rotating device Pre-compression forms are provided.
• the height of the press mold essentially corresponds to the height of the finished friction lining, a comparatively low cost-effective press mold is provided, with the accommodation of the press mold in the pre-compression device creating a sufficiently large cavity for receiving the undensified pourable friction lining mass before the pre-compression ,
• a stamp which is displaceably mounted in the pre-compression mold is provided for the pre-compression. If a storage container with an adjustable slide is provided for introducing the pourable mass into the precompression mold, the pourable mass can be introduced into the cavity of the compression mold in a simple manner from a storage container connected to the slide.
• an axially displaceable screw which is rotatably mounted in a housing to be provided as the precompression device.
• a compression device is described in detail in DE 196 27 440 C2, the disclosure content of which is hereby included.
• an interlayer compaction device for compressing a pourable interlayer material is provided in front of the precompression device.
• the pre-compression device could also be assigned a further storage container having the intermediate layer material, so that both the intermediate layer material and the friction lining material are compressed with the pre-compression device.
• the intermediate layer compression device essentially corresponds to the structure of the precompression device as stated above.
• a base plate is provided for supporting or carrying the mold and, if appropriate, the carrier plate (s) during transport.
• the mold is assigned a closing plate which is provided for placement on the pre-compressed mass contained in the mold. If the side of the closing plate facing the pre-compressed mass has a flat surface, this results in a particularly simple final compression in the manner of a so-called “flash mold” method. Alternatively, however, it is also possible that the side facing the pre-compressed mass Closing plate has at least one stamp-like projection, which penetrates into the cavity of the press mold during the pressing, which results in a final compression in the manner of a so-called “positive mold” method.
• connection area between the mold and carrier plate is sealed by applying force to the mold during the final compression. If several, preferably independently adjustable press stations are provided for final compression, the desired quality of the finished friction linings can be ensured in a simple manner by regulating the individual presses. If a device for automatically separating the mold from the base plate and the closing plate is provided, the entire pressing of the friction lining can be carried out fully automatically with the device according to the invention.
• the device has vertically displaceable bars which have at least three sections of different diameters, starting with the section of the smallest diameter at the freely projecting end of the bars , so that the rods in their upwardly shifted position with the Reach section (s) of smaller diameter through corresponding through openings in the base plate or the mold, and thus a selective lifting of the closing plate and the mold from the base plate is achieved. If holding arms are provided for holding the closing plate and the pressing mold in their raised position, the parts separated from one another can be held after the rods have been lowered to lift the closing plate and the pressing mold and can be successively fed to a transport device.
• FIG. 1 a view of a device for producing friction linings
• FIG. 2 shows a top view of the device according to FIG. 1
• FIG. 2a shows a top view of a device similar to FIG. 2, but with an additional compacting device for compacting an intermediate layer
• 3 schematically shows a section of a precompression mold placed on a press mold and filled with pourable friction lining material which has not yet been compressed
• 3a schematically shows a section of an alternative pre-compression device with a screw
• FIG. 4 schematically shows a section of the pre-compression device according to FIG.
• 5 schematically shows a section of a friction lining mass which has been precompressed in the press mold and has a closing plate placed thereon with a flat surface
• 6 schematically shows a section similar to FIG. 5, but with a closing plate having a stamp-like projection
• 7 schematically shows a perspective detailed view of a press station
• 8 is a perspective view of a device for separating the mold from a base plate and the closing plate
• 8a shows a plan view of a tool unit to be inserted into the device according to FIG. 8
• 8b shows a section along the line VHIb-VIIIb in FIG. 8a
• 8c shows a section along the line VIIIc-VIIIc in FIG. 8b
• FIG. 9 schematically shows a section of a device for ejecting the finished friction lining.
• 1 and 2 schematically show a device 1 for the fully automated production of a friction lining, in particular a brake lining, which essentially consists of a storage container 2 for the pourable friction lining mass, a pre-compressor 3, a press 4 having a plurality of press stations, and a tool dividing device 5 and a friction lining ejection device 5 ', a cleaning and a spraying unit 6 as well as a conveying device 7 and a carrier plate magazine 8.
• a carrier plate 9 is first removed from the carrier plate magazine 8 and placed on a base plate 10.
• a press mold 11 is then placed on the carrier plate 9 and this tool unit 12 is transported into the precompression unit 3.
• a precompression mold 13 which is mounted so as to be vertically displaceable and which is placed on the compression mold 11 after the positioning of the unit 12.
• a cavity 11 ′ in the compression mold 11 and a cavity 13 ′ in the precompression mold 13 thus result in a common cavity for receiving the undensified pourable friction lining mass 14 which is stored in the storage container 2.
• a predetermined amount of friction lining mass 14 is introduced into the receptacle formed by the cavity 11' and 13 'via a chute 2'', the lower end of which is pivoted towards the upper opening of the precompression mold 13.
• four pre-compression molds 13, for example, which are offset by 90 ° to one another, are attached to a rotation device 3 'of the pre-compression unit 3. Accordingly, depending on the position of the rotating device 3 ', a different precompression form 13 can be used.
• a plunger 15 which can be displaced in the precompression mold 13 is then provided in the precompressor unit 3, so that - as can be seen in particular in FIGS. 3 and 4 - the friction layer mass 14 is pre-compressed on the carrier plate 9. With this pre-compression, the friction lining mass 14 is also pre-compressed in through-holes 9 '(see FIG. 2) of the carrier plate 9.
• a pre-compression device 3 shown in FIG. 3a can also be used a worm 15 'rotatably mounted in a housing 15''and displaceable along its axis.
• the friction lining mass 14 is introduced into the cylindrical housing 15 ′′ via a filling funnel 2 ′′, the housing 15 ′′ being heated via a heater 15 ′′ ′′.
• the screw 15 ' is pushed back into an upper end position.
• the plastified friction lining mass is then pressed into the mold 11 by pushing the screw 15 'through a sprue 13''' in a mounting plate 13 ''.
• the feed of the screw 15 ' is preferably generated with the aid of a hydraulic cylinder.
• the pre-compression mold 13 is shifted upwards before a closing plate 17 (cf. FIGS. 5 and 6) is automatically placed on the pre-compressed mass 14.
• an intermediate layer compression device 3 ′′ is additionally provided compared to the device shown in FIG. 2.
• This intermediate layer compression device 3 1 ′ has a storage container 2, in which a pourable intermediate layer material, for example consisting of graphite, phenolic resins, metal chips, glass fibers or the like, is accommodated, which is provided for the connection between the friction lining mass 14 and the carrier plate 9 to improve.
• the intermediate layer compression device 3 ′′ can be constructed essentially like the pre-compression device 3 described above with reference to FIGS. 3 and 3a, so that in order to avoid repetitions on the above Is referred to.
• the closing plate 17 can have a flat surface 18 on its side facing the friction lining mass 14, in order to achieve a pressing in the press 4 in the manner of a “flash mold” method in the subsequent hot pressing process 6, but on the other hand, a closing plate 17 can also be placed, which has a plunger 19 penetrating into the cavity 11 'of the press mold 11, so that in the subsequent hot press process in the press 4, pressing in the manner of a "positive mold” -Procedure is achieved.
• the transition between the cavity 11 'of the mold 11 and the carrier plate 9 can be sealed with the aid of a force by means of springs 20 which are connected to the closing plate 17.
• the press 4 having a plurality of press stations 21 (see FIG. 7), each with a press upper part 21 'and a lower press part 21 ''.
• the cyclical onward transport between the pressing station 21 and the associated opening and closing of the pressing station 21 ensures adequate ventilation of the friction lining mass 14 between the individual pressing processes.
• the tool unit 12 consisting of the base plate 10, the carrier plate 9 with the finally compressed friction lining mass 14, the press mold 11 and with the closing plate 17, is transported into the tool dividing device 5 (cf. in particular FIGS. 8, 8a-8c) ,
• the tool dividing device 5 cf. in particular FIGS. 8, 8a-8c
• four vertically displaceably mounted rods 22 are provided in the tool dividing device 5, which have three sections 23, 23 ', 23''of different diameters.
• Corresponding through holes 24 of different diameters are provided in the closing plate 17 as well as the mold 11 and the base plate 10 (see FIG.
• the base plate 10 is held in the tool part device 5 by two lateral hold-down webs 25 , Hold-down devices 26 are provided for separating the closing plate 17 from the mold 11.
• Hold-down devices 26 are provided for separating the closing plate 17 from the mold 11.
• the press mold 11 lifted from the base plate 10 and the closing plate 17 are held in their raised position after pivoting of holding arms 27, which are activated, for example, by means of air cylinders, even after the rods 22 are down again are shifted (see Fig. 8c).
• the base plate 10 is first transported back with the conveyor 7, for example with a carriage.
• the holding arms 27 are then lowered in the direction of the arrow 27 ', so that the mold 11 is lowered onto the conveyor device 7 and is transported further with the conveyor device 7 to an ejection device 5'.
• the finally compressed friction lining mass 14 together with the carrier plate 9 is ejected from the cavity 11' of the mold 11 via an ejector 29 which is displaced in the direction of the arrow 29 'and is then likewise conveyed in the direction of the return transport device.
• the closing plate 17 is also lowered onto the conveying device 7 and conveyed to the return transport device, so that the base plate 10 and the mold 11 and the closing plate 17 are cleaned and sprayed in a cleaning and spraying unit 6.
• the base plate 10 With the aid of the conveying device 7, the base plate 10, the mold 11 and the closing plate 17 are thus transported in a circle, so that after a finished friction lining has been produced, they are made available for another run through the production process.
• the die 11 can have any number of cavities 11 'and different devices can be provided for precompression or final compression. It is only essential that the friction lining mass is pre-compressed in the actual mold 11 before the mold 11 is transported to the hot press 4 for final compression.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Casting Or Compression Moulding Of Plastics Or The Like (AREA)
• Braking Arrangements (AREA)
• Moulds For Moulding Plastics Or The Like (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=34812544

Family Applications (1)

Country Status (5)

Families Citing this family (10)

Family Cites Families (7)

• 2005
  • 2005-01-31 US US10/585,621 patent/US20080211131A1/en not_active Abandoned
  • 2005-01-31 WO PCT/AT2005/000027 patent/WO2005073587A1/de active Application Filing
  • 2005-01-31 CA CA002554450A patent/CA2554450A1/en not_active Abandoned
  • 2005-01-31 EP EP05700026A patent/EP1709343A1/de not_active Withdrawn
  • 2005-01-31 CN CNB2005800037698A patent/CN100417833C/zh not_active Expired - Fee Related

Non-Patent Citations (1)

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