JPS63162226A - Single-sided corrugated carbboard machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The invention relates to a single-sided corrugated cardboard machine as defined in the preamble of claim (1).

In a typical single-sided corrugated board machine, a press roller presses the cover web against the corrugated web on the lower grooved roller. Due to the different surface shapes of the press roller and the grooved roller, continuous rotation of each roller and continuous rotation of the press roller on the corrugated web on the lower grooved roller does not occur, and the grooves relative to the surface of the press roller do not occur. The tip gets stuck. At relatively low operating speeds and the thickness of the paper accommodating and cushioning the alternating loads, this action is not harmful. However, at high operating speeds, thin paper, and rough-finished shafts, linear deformations occur, and in extreme cases, so-called i-line stamping (linear st
ampings) may occur, degrading the quality of the corrugated cardboard and rendering it unusable. This drawback can be alleviated somewhat by reducing the contact pressure between the grooved roller and the press roller. However, there are other problems in that this cannot be achieved satisfactorily. Another disadvantage of conventional press rollers is that they produce a non-negligible noise of single-sided machines.

Proposals have been made to avoid the aforementioned drawbacks. In the case of the single-sided machine of German Patent Application No. 2421771,
A blower hood is combined with a grooved roller on the bottom. It has a curved flexure surface, the curvature of which corresponds approximately to the outer circumference of the grooved roller. The cover web is guided along a flexible surface that has a plurality of holes through which air can be directed towards the cover web.

Its disadvantage is that the fixed guide surface is small (and wears out in parts). Excessive wear requires replacing the entire blower hood. Another disadvantage is that local parts of the cover web are exposed to air pressure, which This results in different contact pressures across the contact surface and the cover web protrudes into the valleys of the corrugated web.

German Patent Application No. 2,527,819 shows a single-sided machine without press rollers. A pressure belt in the form of a steel band is provided, which extends around the deflection roller. Furthermore, a pressure cushion is provided behind the tip of the steel band.

However, it is difficult to produce uniform contact pressure across the width of the web with a press belt. Such contact pressure is necessary for uniform healing. Furthermore, the contact pressure must be precisely synchronized with the circumferential speed of the grooved roller. Although it is clear that in theory it is possible to accurately calculate such tuning, in practice it is difficult. The slip between the cover web and the press belt is too great and this impairs the desired adhesion of the rFL.

An object of the present invention is to provide a single-sided corrugated cardboard machine that can produce a desired coalescence of the corrugated web and the cover web even with coarse corrugations by means of a press roller, and does not affect the quality of the corrugated cardboard. .

This object is achieved by the features of claim 1.

In the single-sided machine of the invention, the contact surfaces of the press rollers elastically accommodate radial pressure. It is clear that the interaction of the press roller and the grooved roller creates an intermittent impact, which is partially absorbed by the paper, but as mentioned above, in extreme cases linear stamping can also occur. . According to the invention, the contact surface of the press roller elastically adapts to the radial pressure.
The intensity of these impacts can be significantly reduced.

This also reduces the pressure on the cover web and the corrugated web, so that the quality in that area is not compromised.

The radial elastic compliance of the contact surface of the press roller produces a uniform contact pressure of the press roller. Therefore, the large impact of the press roller against the tip of the groove lifts the press roller off the grooved roller, and the force responsive to the bias between the two rollers causes the press roller to rebound, thereby causing the linear deformation and linear stamping described above. The problem of this occurring is solved.

The elastic contact surface of the press rollers also allows the noise reduction of single-sided machines.

In particular, very thin, almost inelastic papers, and very coarse corrugations, benefit from the single-sided machine of the invention.

Various press rollers with elastically compliant contact surfaces are possible. One is a press roller having an inner support member and an annular cylindrical jacket of elastomeric material carried by the support member. The upper surface of this press roller is elastic and produces the effect described above.

Any suitable elastomeric plastic material can be used as the material for the elastomeric jacket. Because the elastomeric plastic material has a certain degree of roughness, the hitherto common separation drive mechanism for the press rollers can be eliminated. The press roller can be easily engaged with the lower grooved roller. Some amount of slip may occur.

Usually steam heats the press roller to provide the necessary temperature of the fusion area. Elastomeric plastic materials that meet the wear and strength requirements of the press roller have sufficient thermal conductivity to transfer the heat generated inside the press roller to the paper. During operation, it is natural that the friction between the press roller and the paper heats the press roller. There is therefore no need to heat the press roller itself when the cover web is sufficiently preheated just before being fed to the press roller. The cover web may be wound around a suitable preheating roller at an optimum winding angle.

According to a variant of the invention, the press roller has an inner support member, an annular cylindrical metal jacket and elastic means between the jacket and the support member. In this embodiment, the metal jacket has some rigidity, but it can be deflected to some extent under radial pressure, thereby achieving the effect described above. However, it is also possible to make the jacket thin and elastic itself.

As for the compliant support of the jacket on the support member, this can be designed in different ways. According to the invention, an elastomeric layer is arranged between the jacket and the cylindrical support member. The jacket may be supported by a plurality of longitudinally spaced resilient metal rings around the outer periphery of the support member. The ring can also be placed in a groove in the cylindrical support member. The ring may be made of elastomeric material. However, this could also be an elastomer hollow body that can be expanded somewhat (
, its degree of elasticity is determined by the material and the gaseous medium. Instead of each ring, a hollow or solid rod may be spirally attached to the outer periphery of the support member. If using a separate expansion ring, connect this separately to the pressure source and
It may be possible to provide different radial pressure manipulations of the annular cylindrical jacket. This cambers the press roller to a desired state.
ing ) can also be done.

In the case of an inflatable ring, its elasticity can be varied. The elasticity of the jacket can be changed by allowing the jacket and the support member to be displaced relative to each other in one axial direction, and by making the inner surface of the jacket conical. By displacing the jacket relative to the support member, the contact pressure between the jacket and the elastic means can be increased or decreased.

The support member in all the embodiments described above may be constituted by a solid cylinder, or it may be a hollow cylinder.

The design as a hollow cylinder offers the advantage of a low mass and a low moment of inertia, which do not affect the quality of the press-row or corrugated cardboard. The natural frequency of the press roller is determined by its *ffi. The lower the mass, the higher the natural frequency. The degree of W1 impact between the press roller and the tip of the groove is also determined by the natural frequency,
The lower it is, the higher the latter. As previously mentioned, hollow cylindrical press rollers can also be operated in heated or non-heated formats.

In supporting the metal jacket of the invention, the outer periphery of the support member may be provided with two axially spaced radial flanges in which at least one elastomeric ring is disposed. The ring may be of circular cross-section or may be U-shaped, such as the well-known lip seals of elastomeric materials. If an annular cylindrical jacket is used, it can be formed as a hollow body. In this case, it may be provided with a connection for connection to a pressure source. Therefore, the annular cylindrical jacket can be easily deformed by pressure manipulation, and various camberings can be obtained. Various cambers can also be obtained by creating a void between the annular cylindrical jacket and the support member that is subjected to appropriate fluid pressures.

Supporting the annular cylindrical jacket on the support member includes attaching at least two axially spaced radial flanges to the jacket and supporting the annular cylindrical jacket on the support member via an annular resilient compliant element. It's okay. When a plurality of pairs of rings are provided for elastically supporting the annular elastic jacket, an annular space can also be provided between the plurality of pairs of rings and connected to a pressure source. This allows the elasticity of the elastic adaptation means to be varied.

The elastic compliant means of the embodiments described above allow the contact surface of the press roller to be compliant. The press roller made of elastic material may have an elastic conformable jacket.

The present invention will be described in detail below.

FIG. 1 shows a press roller consisting of a cylindrical core (10) of a press and a jacket (11) of elastic material arranged on the core. attached to the core.

In Figure 2, a hollow cylindrical core (12) is coated with a jacket (13) of elastomeric material.

For example, the hollow core can be heated with steam or other methods. This has the advantage of having a lower mass than the core of Figure 1.

In the case of FIG. 3, an annular cylindrical elastomer coating (I5) is applied to the outer periphery of a solid cylindrical core (14). Then, an annular cylindrical jacket (16
> extends around the coating. The configuration shown allows the jacket (16) to move relative to the core (14) when pressure is applied. It is supported in a floating state so to speak. It is also possible to replace the solid core (14) with the hollow core of FIG.

In FIG. 4, a cylindrical core (17) is provided as a support member with independent grooves (18) formed on its outer periphery. An elastomer ring (19) of circular cross section is inserted into the groove (18). These protrude radially around the outer periphery of the cylindrical core (17). This supports a metal annular cylindrical jacket (20).

In FIG. 5, a groove (21) for accommodating a hose (22) is provided on the outer periphery of a core (17) similar to that in FIG. 4. The pressure fluid allows the hose to be expanded to the desired pressure. In FIG. 5, the connection for the right-hand hose (22) is indicated by reference numeral (23). Separate connections can also be provided for other hoses (22).

It is therefore possible to create and adjust different pressures on the hose (22) and to differentially camber the jacket (20) supported on the hose (22). Alternatively, all hoses (22) can also be connected to a common pressure source (P).

The embodiment of FIG. 6 also has a solid cylindrical core (17) with a groove (18) for accommodating the ring element (19) described above. The annular cylindrical jacket (24) has a conical inner surface (22). Mark the jacket (24) with the double arrow (
An axial movement in the direction of 26) can also produce different contact pressures on the ring (19), providing different biases and different elasticities. This allows the jacket (
24) Adaptive support can be adjusted. Instead of the solid core (17) in FIGS. 4 to 6, a hollow core (17) in FIG. 2 may be used.

In the embodiment of FIG. 7, two axially spaced annular discs (2B), (2
9) is fixed. At the outer periphery, a disc (28
), (29>) have a groove (30) for receiving an elastomeric ring (31), and an annular cylindrical metal jacket (32) is conformably supported on the ring (31). In the embodiment, the shaft (27) has two axially spaced discs (33), (
34) is fixed. An elastomer ring element (35) having a U-shaped cross section is arranged in each recess. This is tilted at 90° and the jacket (32) is compliantly supported on the elastic legs of the ring (35).

In the embodiment of FIGS. 7 and 8, the shaft (27),
Discs (2B), (29) and (33), (34)
and the void (3) formed by the jacket (32)
5) is subjected to hydraulic or pneumatic pressure. For this purpose, the inner bore (36) of the shaft (27) is
) extends into the cavity (35) at the tip of the shaft. This allows varying the elastic bias and cambering for the jacket (32).

In the embodiment of FIG. 6, the grooves (18) may be arranged in a sawtooth pattern and the bottom surfaces of the grooves may be inclined. Jacket (24)
When the ring (19) is displaced, the ring (19) moves upwards and downwards along its inclination path.

The embodiment of FIG. 9 corresponds to the embodiment of FIG.

Identical parts are provided with the same reference numerals.

However, the jacket (37) is hollow, as indicated by reference numeral (38). The cavity 38) is then provided with a connection (39) for pressure fluid. Therefore, the jacket (27) can be cambered differently.

In the embodiment of FIG. 10, the shirt 1-(40) has two axially spaced annular grooves (41) that accommodate elastomeric rings (42) of circular cross-section. The inner surface of the annular cylindrical jacket (43) is a ring (
42) supported by two annular discs (44), (45) on top. In the embodiment of FIG. 11, the shaft (4G) has an annular recess (47) in which a ring element (48) of elastomeric material of U-shaped cross section is arranged.

The inner ring elements (48) each have a shaft (4
6) are fixed to each other in the axial direction by the shoulders. The outer surface of the outer element (48) is fixed by a metal ring (49), which is attached to the shirt 1-(46).
) is fixed. An annular space (50) is provided between the pairs of rings (48), which can be connected to a source of fluid pressure by a channel (51) of the shaft (46). Similar to Figure 10, an annular cylindrical jacket (4
3) has annular support discs (44), (45).

An annular flange (5) is provided on the inner surface of the disks (44) and (45).
2) is fixed and supported on a pair of ring elements (48). In the embodiment of FIGS. 10 and 11, the jacket (43) is also connected to each shaft (40
) and (46), allowing it to accommodate radially when a radial load is applied. When the annular space (50) is subjected to pressure, its elasticity changes.

In the embodiment of FIG. 12, two disks (54), (5
5) are fixed on the shaft (53) at axially spaced intervals. Its thickness increases toward the outer periphery. A relatively large groove (56) is formed on the outer periphery of the disks (54), (55), in which a plurality of pairs of U-shaped ring elements (57) of elastomeric material are arranged. An annular cylindrical jacket (58) is then elastically supported thereon. An annular space (59) is formed between the plurality of pairs of ring elements (57), which is connected to the channels (6) of the disks (54) and (55).
0) can be connected to a fluid pressure connection.

FIG. 13 shows a press roller (60
) is shown. The surface (61) of the hollow cylinder is relatively thin.

The material of the press roller is usually sujiru, and the surface (6
D) has sufficiently large elasticity mainly in the radial direction, can elastically support the contact surface of the press roller itself, and can obtain similar effects. In the embodiment of FIG. 13, the entire press roller is integral. In the embodiment of FIG. 14, the shaft (62) has two annular flanges (63), (64) fixed at a distance from each other, and the annular flange (6 buttons, (64) is attached to its outer periphery. It has a relatively thin jacket (65〉).

[Brief explanation of the drawing]

1 to 14 are longitudinal sectional views showing various embodiments of the press roller of the single-sided corrugated cardboard machine of the present invention. (10), (12), (14), (17)...
... Cylindrical core (11), (13), (16),
(20), (24)... Jacket (15)...
・・・・・・・・・・・・・・・・・・ Elastomer coating (19)・・・・・・・・・・・・・・・
・・・・・・・・・・・・・・・・・・Elastomaring (22)・・・・・・・・・・・・・・・・・・・・・
・・・・・・・・・・・・・・・ Hose Patent Applicant Beters Machinenfupprik Gesellschaft Mitsut Beschlenkterhafrang Agent Kenji Arata (1 other person) Fig, 7 Fig, 8 Fig, 1
0Fig, 11Fig, 12

Claims (15)

[Claims] (1) comprising upper and lower grooved rollers and a press roller cooperating with said lower grooved roller, said press roller being movably supported and via pressure means said lower grooved roller; A single-sided corrugated cardboard machine capable of moving to a preset position relative to a grooved roller, characterized in that the contact surface of said press roller is adapted elastically to radial pressure. machine. (2) The press roller is an inner support member (10), (1
2) and an annular jacket (11), (13) of elastomeric material held by said support member. (3) The press roller is an inner support member (14), (1
7), annular cylindrical metal jacket (16), (20)
, (24) and elastic accommodation means (15), (19) between the jacket and the support member. 4. A machine according to claim 3, wherein said elastic accommodation means comprises an elastomeric layer (15) between said jacket (16) and a cylindrical support member (14). (5) a plurality of rings (19) of elastic material arranged at intervals in the longitudinal direction around the outer periphery of the support member (17);
22) is provided, and a jacket (20), (24) is provided on this.
) is supported. (6) A machine according to claim 5, wherein said ring is an inflatable hollow body (22). (7) Machine according to claim (6), in which the hollow body (22) can be detachably connected to a pressure source. (8) The jacket (24) and the support member (17)
A machine according to any one of claims 5 to 7, wherein the inner surface (25) of the jacket (24) is conical. . (9) The machine according to any one of claims (1) to (8), wherein the support member (12) is a hollow cylinder. (10) The support member has two axially spaced radial flanges (28), (29), (33).
), (34), and at least one elastomer ring (31), (35) is arranged on the outer periphery of the machine according to any one of claims (5) to (8). . (11) The rings (19), (31), and (35) have a circular cross section or a U-shape.
The machine according to any one of items 5) to (10). (12) The machine according to any one of claims (3) to (11), wherein the jacket (37) comprises a hollow body. (13) said jacket (43) is retained by axially spaced radial flanges (44), (45), said flanges (44), (45) supporting a resiliently compliant annular element (42); A machine according to claim 3, wherein the machine is supported on a support member by. (14) The elastic accommodating rings (48) and (57) are arranged in pairs, and the pair of rings are arranged in the annular space (50),
59. A machine according to any one of claims 5 to 13, which forms and seals the machine, which can be connected to a pressure source. (15) Press rollers (60), (60a) made of elastic material
Machine according to claim 1, in which the machine has an elastically compliant jacket (61), (65).