DEVICE AND METHOD FOR PRODUCING A COMPRESSION MOULDED BODY

Abstract

The invention relates to a device (10) for producing a compression moulded body (11), having at least one first moulded layer, wherein the device has an upper ram arrangement (12) and a lower ram arrangement (13), with in each case at least one ram unit (15, 16), and a mould (14), wherein the ram unit has at least one ram tool (17), wherein the ram tools are configured such that they can be displaced axially with respect to one another in a die (19) of the mould, in such a way that moulding segments can be configured in the mould by means of the ram tools, wherein the device has a filling device (27), wherein the die can be filled with moulding material by means of the filling device, wherein the upper ram arrangement and the lower ram arrangement in each case have a multiplicity of circularly annually arranged ram units, wherein the mould is configured as a die plate (18) and, together with the ram units, configured as a rotor which is configured such that it can be rotated about an axis, wherein the device has a feed device (30), wherein a film (31) can be fed to the rotor by means of the feed device, such that it lies between a ram tool and a die which is configured in the die plate, wherein a layer can be configured on the first moulding layer by means of the film.

Claims

1. A device (10, 45, 52, 58, 66) for producing a compression moulded body (11, 51, 74) with at least one first moulded layer, wherein the device comprises an upper ram arrangement (12) and a lower ram arrangement (13), which respectively have at least one ram unit (15, 16, 47, 48), and a mould (14), wherein the ram unit has at least one ram tool (17, 46), wherein the ram tools are designed for being axially displaceable relative to one another in a die (19, 50, 57, 65, 73) of the mould in such a way that mould segments (29, 35) can be formed in the mould by means of the ram tools, wherein the device has a filling device (27, 33), and wherein the die can be filled with moulding material (28, 34) by means of the filling device, characterized in that the upper ram arrangement and the lower ram arrangement respectively comprise a multiplicity of annularly arranged ram units, wherein the mould is realized in the form of a die plate (18) and forms a rotor (24), which is designed to be rotatable about an axis (25), together with the ram units, wherein the device has a feed device (30, 53, 59, 67), wherein a film (31) can be fed to the rotor by means of the feed device such that it lies between a ram tool and a die formed in the die plate, and wherein a layer can be produced on the first moulded layer by means of the film.

2. The device according to claim 1, characterized in that ram units (15, 16, 47, 48) of the upper ram arrangement (12) respectively comprise a hold-down device (40, 70), wherein the film (31) can be fixed on the die plate (18) above the die (19, 50, 57, 65, 73) by means of the hold-down device.

3. The device according to claim 1, characterized in that the film (31) is a film strip (32, 56, 62, 68), which can be tangentially fed to the rotor (24) by means of the feed device (30, 53, 59).

4. The device according to claim 3, characterized in that the film strip (32, 56, 62, 68) can be fixed on the die plate (18) by means of a multitude of ram units (15, 16, 47, 48) of the upper ram arrangement (12) in such a way that the film strip can at least sectionally follow a rotational motion of the rotor (24) along a circular arc (44) on the die plate.

5. The device according to claim 3, characterized in that the feed device (53) comprises stamping elements (55) for buckling the film strip (56) on one side.

6. The device according to claim 3, characterized in that a multitude of film strips, which are arranged parallel to one another and respectively assigned to ram tools (17, 46), can be tangentially fed to the rotor (24) by means of the feed device (59).

7. The device according to claim 6, characterized in that the feed device (59) comprises cutting elements (61) for separating a film strip (62) into parallel partial film strips (63).

8. The device according to claim 1, characterized in that the film is a film sheet (69), which can be tangentially fed to the rotor (24) by means of the feed device (67).

9. The device according to claim 8, characterized in that the film sheet (69) can be fed to a suction device (71) of the upper ram arrangement (12) by means of a conveyor belt (68) of the feed device (67).

10. The device according to claim 1, characterized in that the ram units (15, 47) of the upper ram arrangement (12) respectively comprise a suction device (71), wherein the film can be fixed on the ram unit above the die (19, 50, 57, 65, 73) by means of the suction device.

11. The device according to claim 1, characterized in that the device (10, 45, 52, 58, 66) is designed for producing a multi-layer compression moulded body (11, 51, 74) with the first moulded layer and at least one second moulded layer.

12. The device according to claim 11, characterized in that the device (10, 45, 52, 58, 66) comprises a first filling device (27), wherein a first mould segment (29) formed in the die (19, 50, 57, 65, 73) can be filled with moulding material (28) for producing the first moulded layer by means of the first filling device, wherein the device comprises a second filling device (33), and wherein a second mould segment (35) formed in the die can be filled with moulding material (34) for producing the second moulded layer by means of the second filling device.

13. The device according to claim 12, characterized in that the feed device (30, 53, 59, 67) is arranged on the rotor downstream of the first filling device (27) and upstream of the second filling device (33) referred to the rotating direction of the rotor (24).

14. The device according to claim 11, characterized in that the layer is produced in the form of a separation layer.

15. The device according to claim 1, characterized in that the layer is produced in the form of a cover layer.

16. The device according to claim 1, characterized in that the device (10, 45, 52, 58, 66) comprises a delivery device (36), wherein compression moulded bodies (11, 51, 74) can be transported away from the rotor (24) by means of the delivery device.

17. The device according to claim 1, characterized in that the ram unit (15, 16, 47, 48) comprises a multiplicity of ram tools (17, 46).

18. The device according to claim 1, characterized in that the rotor (24) is realized in the form of a rotary press.

19. A utilization of a device (10, 45, 52, 58, 66) according to claim 1 for producing a compression moulded body (11, 51, 74) with at least one first moulded layer and a layer produced on the first moulded layer by means of a film (31).

20. A method for producing a compression moulded body (11, 51, 74) with at least one first moulded layer by means of a device (10, 45, 52, 58, 66), wherein the device comprises an upper ram arrangement (12) and a lower ram arrangement (13), which respectively have at least one ram unit (15, 16, 47, 48), wherein ram tools (17, 46) of the ram units are axially displaced relative to one another in a die (19, 50, 57, 65, 73) of a mould (14) of the device, wherein mould segments (29, 35) are formed in the mould by means of the ram tools, and wherein the die is filled with moulding material (28, 43) by means of a filling device (27, 33) of the device, characterized in that the upper ram arrangement and the lower ram arrangement respectively comprise a multiplicity of annularly arranged ram units, wherein the mould is realized in the form of a die plate (18) and forms a rotor (24), which rotates about an axis (25), together with the ram units, wherein a film (31) is fed to the rotor by means of a feed device (30, 53, 59, 67) of the device such that it lies between a ram tool and a die formed in the die plate, and wherein a layer is produced on the first moulded layer by means of the film.

21. The method according to claim 20, characterized in that a first mould segment (29) formed in the die (19, 50, 57, 65, 73) is during a rotation of the rotor (24) filled with moulding material (28) for producing the first moulded layer by means of a first filling device (27) of the device (10, 45, 52, 58, 66), wherein the film (31) can be tangentially fed to the rotor by means of the feed device (30, 53, 59, 67) and fixed on the die plate (18) by means of a hold-down device (40, 70) of the ram units (15, 47) of the upper ram arrangement (12), wherein the first moulded layer and the layer in the form of a separation layer are produced by compressing the moulding material and punching out the film with the ram tool (17, 46), wherein a second mould segment (35) formed in the die is filled with moulding material (34) for producing the second moulded layer by means of a second filling device (33) of the device, and wherein the second moulded layer is produced by compressing the moulding material with the ram tool.

22. The method according to claim 20, characterized in that a first mould segment (29) formed in the die (19) is during a rotation of the rotor (24) filled with moulding material (28) for producing the first moulded layer by means of a first filling device (27) of the device (10), wherein the film (31) can be tangentially fed to the rotor by means of the feed device (30) and fixed on the die plate (18) by means of a hold-down device (40) of the ram units (15) of the upper ram arrangement (12), and wherein the first moulded layer and the layer in the form of a cover layer can be produced by compressing the moulding material and punching out the film with the ram tool (17).

Description

[0033] In these drawings:

[0034] FIG. 1 shows a device in the form of a perspective view;

[0035] FIG. 2 shows the device in the form of a second perspective view;

[0036] FIG. 3 shows the device in the form of a third perspective view;

[0037] FIG. 4 shows the device in the form of a fourth a perspective view;

[0038] FIG. 5 shows the device in the form of a detailed perspective view;

[0039] FIG. 6 shows the device in the form of a second detailed perspective view;

[0040] FIG. 7 shows the device in the form of a third detailed perspective view;

[0041] FIG. 8 shows the device in the form of a fourth detailed perspective view;

[0042] FIG. 9 shows the device in the form of a fifth detailed perspective view;

[0043] FIG. 10 shows the device in the form of a sixth detailed perspective view;

[0044] FIG. 11 shows the device in the form of a seventh detailed perspective view;

[0045] FIG. 12 shows the device in the form of an eighth detailed perspective view;

[0046] FIG. 13 shows a second embodiment of a device in the form of a detailed perspective view;

[0047] FIG. 14 shows the device according to FIG. 13 in the form of a second detailed perspective view;

[0048] FIG. 15 shows the device according to FIG. 13 in the form of a third detailed perspective view;

[0049] FIG. 16 shows the device according to FIG. 13 in the form of a fourth detailed perspective view;

[0050] FIG. 17 shows a third embodiment of a device in the form of a detailed perspective view;

[0051] FIG. 18 shows the device according to FIG. 16 in the form of a second detailed perspective view;

[0052] FIG. 19 shows a fourth embodiment of a device in the form of a detailed perspective view;

[0053] FIG. 20 shows the device according to FIG. 18 in the form of a second detailed perspective view; and

[0054] FIG. 21 shows a fifth embodiment of a device in the form of a detailed perspective view.

[0055] A synopsis of FIGS. 1-12 shows a device 10 for producing a multi-layer compression moulded body 11 in the form of various views. The device 10 is illustrated in simplified form for the purpose of better visualization. The device 10 comprises an upper ram arrangement 12 and a lower ram arrangement 13, as well as a mould 14. The upper ram arrangement 12 comprises 24 ram units 15 and the lower ram arrangement 13 comprises 24 ram units 16, wherein said ram units respectively have three rectangular ram tools 17. The mould is realized in the form of a die plate 18 with dies formed therein, wherein said dies respectively correspond to the ram tools 17. The ram units 15 and 16 are respectively mounted in a not-shown ram guide with their ram shaft 21 so as to be longitudinally movable along a longitudinal axis 20. A roll 23 is rotatably mounted on an end 22 of each ram shaft 21, wherein the rolls 23 roll on not-shown annular plate cams such that the ram units 15 and 16 reach the positions shown. The ram units 15 and 16 from a rotor 24, which is rotatable about an axis 25, together with the die plate 18. Consequently, a rotation of the rotor 24 causes a continuous motion of the ram units 15 and 16 and a displacement of the ram tools 17 relative to the dies 19. One ram unit 15 and one ram unit 16 respectively form a corresponding ram unit pair 26, which is assigned to the three dies 19.

[0056] The device 10 also comprises a first filling device 27, by means of which a first moulding material 28 is filled into a first mould segment 29 that is formed in the die 19 by positioning the ram tool 17 accordingly. The device 10 furthermore comprises a feed device 30, by means of which a film 31 in the form of a film strip 32 can be fed to and transported away from the rotor 24. A second filling device 33 follows the feed device 30 in the rotating direction of the rotor 24, wherein a second moulding material 34 is filled into a second mould segment 35, which is formed in the die 19 by positioning the ram tool 17 accordingly, by means of the second filling device. A delivery device 36 is arranged on the rotor 34 downstream of the second filling device 33 and upstream of the first filling device 27, wherein the delivery device is realized in the form of a sheet metal rail 37 for receiving the compression moulded bodies 11 ejected from the dies 19.

[0057] A synopsis of FIGS. 5-12 shows a sequence of a method for producing the multi-layer compression moulded body 11 in greater detail. The ram tools 17 in the region of the first filling device 27, which is merely illustrated schematically in the form of a box 38 with a material feed line 39, are initially lowered in the dies 19 to such a level that the first mould segment 29 is formed. The film strip 32 is tangentially fed to the rotor 24 above the dies filled with the first moulding material 28. The ram units 15 are then lowered to such a level that the film strip 32 is respectively clamped or fixed on the die plate 18. In contrast to the ram units 16, the ram units 15 respectively comprise hold-down devices 40. The hold-down device 40 is realized in the form of a hold-down element 41 that surrounds the ram tools 17 and has a longitudinal guide 42 in the direction of the longitudinal axis 20, wherein the longitudinal guide 42 exerts a spring force upon the hold-down element 41. In this way, the film strips 32 can be fixed on a surface 43 of the die plate 18 and guided along a circular arc 44, wherein each die 19 within the circular arc 44 is completely covered by the film 31. The film strip 32 is furthermore punched out by means of the ram tools 17 such that a not-shown separation layer is produced of the film 31 and the first moulding material 28 is compressed into a likewise not-shown first moulded layer. The punched-out film strip 32 is then once again tangentially guided away from the rotor 24. In this case, the film strip 32 is stored on not-shown rolls.

[0058] Subsequently, the ram tools 17 are simultaneously lowered in the respective dies 19 to such a level that the second mould segment 35 is formed, which is then filled with the second moulding material 34 at the second filling device 33. The second filling device 33 is likewise illustrated in the form of a box 38 with material feed lines 39. After the second mould segments have been filled, the not-shown second moulded layer is pressed by means of a motion of the ram tools 17 in the dies 19. The ram tools 17 of the ram units 16 are then moved upward to such a level that the compression moulded bodies 11 are ejected from the dies 19. The compression moulded bodies 11 then reach the sheet metal rail 37 and can be transported to further processing or use.

[0059] FIGS. 13-15 show a device 45, which is only partially illustrated and, in contrast to the device according to FIGS. 1-12, respectively comprises 12 ram tools 46 on the ram units 47 and 48. Consequently, 12 dies 50 are also assigned to a ram unit pair 49. Essentially cuboid compression moulded bodies 51 are produced in this example.

[0060] A synopsis of FIGS. 16 and 17 shows a device 52 with a feed device 53, which comprises two rollers 54 with stamping elements 55 for buckling a film strip 56 on one side. Due to this buckling, the film strip 56 is sectionally folded multiple times, wherein the plane, unfolded film strip 56 is always placed above the dies 57 by means of the feed device 53.

[0061] FIGS. 18 and 19 show a device 58 with a feed device 59, wherein the feed device 59 comprises a roller 60 with cutting elements 61. The cutting elements 61 separate the film strip 62 into three parallel film strips or partial film strips 63. Each of the partial film strips 63 can then cover one row 64 of dies 65.

[0062] FIGS. 20 and 21 show a device 66 with a feed device 67, which comprises a conveyor belt 68 for tangentially feeding film sheets 68. A not-shown suction device 71 is arranged on a hold-down device 70 and generates a vacuum underneath a hold-down element 72 of the hold-down device 70. In this way, the film sheets 69 can be fixed on the hold-down element 72 and positioned above the dies 73. After pressing the compression moulded bodies 74 and punching out the film sheets 69, the punched-out film sheets 69 can be once again removed from the hold-down element 72 by means of a suction device 75.