CN217990451U - Rubber sleeve - Google Patents
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- CN217990451U CN217990451U CN202222050697.6U CN202222050697U CN217990451U CN 217990451 U CN217990451 U CN 217990451U CN 202222050697 U CN202222050697 U CN 202222050697U CN 217990451 U CN217990451 U CN 217990451U
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Abstract
The application relates to the technical field of coiling of metal tape processing lines, in particular to a rubber sleeve, which comprises a sleeve, wherein an internal structure with a certain depth is preset on the outer surface of the sleeve to form an invisible cavity, the section of the invisible cavity along the length direction perpendicular to the sleeve is a non-centrosymmetric pattern, and the cavity is arranged on the sleeve to form an invisible and asymmetric coiling position. Relative to the symmetrical roll-in position, the shoulder of the tape head entering the roll-in area b of the sleeve is basically eliminated, and the distance between the contact point of the tape head and the point a and the height difference are wound for one circle, so that the number of transverse folding marks (shoulder marks and head marks) is effectively reduced. The basic structure is combined in the same sleeve in the same direction, different directions and multiple positions, so that the use requirements of the same sleeve in different coiling directions and different thickness specifications are met.
Description
Technical Field
The application relates to the technical field of coiling of metal strips, in particular to a rubber sleeve.
Background
At present, in the coiling process of a metal plate strip finished product, a transverse crease mark is often generated, and particularly comprises a belt head mark and a shoulder mark, wherein the belt head mark refers to stress concentration caused by sudden change of curvature radius caused by the belt head in the radial direction of a metal coil corresponding to the belt head on an inner ring layer of the coiled metal coil, so that macroscopic refraction rays naturally appearing on the surface of the plate strip, including the macroscopic refraction rays in oilstone polishing and the uneven hand feeling existing in hand touch (the transverse crease mark). In order to solve the belt head mark, a roll-in position structure is designed and processed on a rubber sleeve, but shoulder marks (including natural and naked eyes after polishing) which are not related to the belt head mark and are visible on the surface of the belt strip after the metal belt is rolled at a curved surface transition position which is not at the belt head position, and the hand feeling is not smooth. Because the prior art can not be suitable for the winding quality requirement of cold-rolled sheet materials with various strengths and specifications, a novel roll-in position structure which can better meet the requirement of eliminating the transverse crease mark when various fine sheet materials are wound is urgently needed to be developed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a gum cover has solved the current not enough that eliminate in the above-mentioned cross-folding seal income roll bit architecture technique.
The application provides a rubber sleeve which comprises a sleeve, wherein an invisible cavity is formed in the inner structure of the sleeve away from the outer surface of the sleeve by a preset depth;
the section of the invisible cavity along the length direction perpendicular to the sleeve is a cross section, and the cross section of the invisible cavity is gradually reduced along the winding direction of the metal strip head so as to form an invisible winding position.
In the above technical solution, further, the cross section of the invisible cavity is a structure formed by sequentially connecting an arc line segment, a curve segment and a straight line segment end to end, wherein the arc line segment is a semicircular line segment or a quarter circular arc line segment.
In any of the above technical solutions, further, the sleeve is annular, a rectangular coordinate system is established on a cross section perpendicular to the length direction of the sleeve, an origin of the rectangular coordinate system coincides with the center of the sleeve, and a Y axis of the rectangular coordinate system is arranged along a radial direction of the sleeve;
the intersection point of the arc line segment and the straight line segment is O 2 The intersection point of the arc line segment and the curve line segment is a, and the intersection point of the curve line segment and the straight line segment is b;
straight line O 2 a is coincident with the Y axis of the rectangular coordinate system and is a straight line O 2 b coincides with the X-axis of the rectangular coordinate system.
In any of the above solutions, further, along the Y-axis direction, O 2 The distance H between the point and the outer surface of the sleeve is 10 mm-20 mm;
line segment O 2 The length of b is 30 mm-80 mm.
In any of the above technical solutions, further, the sleeve includes a base layer and an outer surface layer disposed from inside to outside, and the invisible cavity is formed between the base layer and the outer surface layer; the joint point of the adhesive layers of the base layer and the outer surface layer is c, and the distance between the c point and the origin of the rectangular coordinate system is greater than or equal to the distance between the b point and the origin of the rectangular coordinate system.
In any of the above technical solutions, further, the straight line O 1 b and a straight line O 1 The included angle between c is 5 degrees to 20 degrees;
the distance from the point c to the outer surface of the sleeve is 1-15 mm along the radial direction of the sleeve;
R O1c -R O1b =0 mm-20 mm; the length of a curve segment between the point c and the point b is 0 mm-80 mm;
along the Y-axis, a point and O 2 The height difference between the points is h =0 to (t + lambda), wherein t is the thickness of the plate strip and is in mm, and lambda =0.5 mm-2 mm.
In any of the above solutions, further, the hardness of the base layer is greater than the hardness of the outer surface layer; and/or
And a reinforcing layer of fusion mesh or mesh cloth is laid on one side of the invisible cavity far away from the center of the sleeve, and is vulcanized and molded together with the colloid of the outer surface layer.
In any of the above technical solutions, further, symmetrical invisible cavities are formed in the invisible cavities with respect to the Y axis of the rectangular coordinate system.
In any of the above technical solutions, further, the number of the invisible cavities is plural, and the plural invisible cavities are arranged in the same direction along the circumferential direction of the sleeve; or
The number of the invisible cavities is multiple, and at least two invisible cavities are arranged along the circumferential direction of the sleeve in a reverse mode.
In any of the above technical solutions, further, the outer surface of the sleeve is formed with a missing portion recessed toward the inside thereof to form an apparent roll-in position.
Compared with the prior art, the beneficial effect of this application is:
the utility model provides a pair of gum cover specifically sets up foretell cavity on the sleeve, the position is rolled up to stealthy asymmetric income promptly, the tape head is rolled up position cavity highest point all the time and is gone into to roll up one side that highly degressive, the limitation that roll position need be compromise both sides transition interface (shoulder) span is big is gone into to the symmetry, can make the degressive one side of cavity height form glossy profiled surface better when laminating with the slab band head, shoulder print of cisoid side can be eliminated completely, the tape head shortens with the transition juncture span that corresponds one side, the atress transition area increases, through reasonable selection parameter lambda and optimization type linear relation curve, can obtain satisfied cross-folding seal decrement index.
In addition, the invisible cavities can be combined and configured in the same direction and the opposite direction through different pluralities of positions, namely different positions on one sleeve are provided with the invisible cavities, and the use requirements of the same sleeve in different coiling directions and different thickness specifications are met.
Drawings
In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings needed to be used in the detailed description of the present application or the technical solutions in the prior art are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other applications in the same technical terms can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a rubber sleeve according to an embodiment of the present disclosure;
FIG. 2 is an enlarged schematic view of FIG. 1 at A;
fig. 3 is a schematic structural diagram of a rubber sleeve provided in the third embodiment of the present application;
fig. 4 is a schematic structural diagram of a rubber sleeve provided in the fourth embodiment of the present application;
fig. 5 is a schematic structural view of a rubber sleeve provided in the fifth embodiment of the present application;
fig. 6 is a schematic structural diagram of a rubber sleeve provided in a sixth embodiment of the present application;
fig. 7 is another schematic structural diagram of the rubber sleeve according to the sixth embodiment of the present application.
Reference numerals are as follows:
1-sleeve, 11-base layer, 12-outer surface layer, 13-invisible cavity, 14-missing part, 2-metal band and 3-filling material.
Detailed Description
The technical solutions of the present application will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments.
The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application.
All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and operate, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present application, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in this application will be understood to be a specific case for those of ordinary skill in the art.
The gum cover according to some embodiments of the present application is described below with reference to fig. 1-7.
Example one
Referring to fig. 1 and 2, an embodiment of the present application provides a rubber sleeve, which includes a sleeve 1, and an internal structure of the sleeve 1, which is a predetermined depth from an outer surface thereof, is formed with a hidden cavity;
the section of the invisible cavity 13 along the direction perpendicular to the length direction of the sleeve 1 is a cross section, and the cross section of the invisible cavity 13 is a non-centrosymmetric figure, and preferably, the cross section of the invisible cavity 13 is tapered along the rolling direction of the head of the metal strip 2.
Based on the structure described above, it can be known that the cavity, that is, the invisible and asymmetric roll-in position is arranged on the sleeve 1, the belt head is always rolled from the highest hollow position of the roll-in position to the side with decreasing height, the limitation that the symmetric roll-in position needs to consider the large span of the transition interfaces (shoulders) at two sides is broken through, the side with decreasing hollow height can better form a smooth molding surface when being attached to the head of the belt strip, the shoulder mark at the forward side can be completely eliminated, the transition boundary span between the belt head and the corresponding side is shortened, the stressed transition area is increased, and the satisfactory transverse folding mark reduction index can be obtained by reasonably selecting the parameter lambda and optimizing the linear relation curve.
In addition, the invisible cavities 13 can be arranged at different positions on one sleeve 1 in the same direction and in opposite directions, so that the use requirements of the same sleeve 1 in different coiling directions and different thickness specifications are met.
In this embodiment, preferably, as shown in fig. 2, the cross section of the invisible cavity 13 is a structure enclosed by a semicircular line segment, a curved line segment and a straight line segment which are sequentially connected end to end, and the semicircular line segment may be replaced by a quarter circular arc line segment.
Further, preferably, as shown in fig. 1 and 2, in the present embodiment, the sleeve 1 is annular, and a rectangular coordinate system is established on a cross section perpendicular to a length direction thereof, and an origin O of the rectangular coordinate system 1 The Y axis of the rectangular coordinate system is coincident with the center of the sleeve 1 and is arranged along the radial direction of the sleeve 1;
the intersection point of the semicircular line segment and the straight line segment is O 2 The intersection point of the semicircular line segment and the curve segment is a, and the intersection point of the curve segment and the straight line segment is b; straight line O 2 a is coincident with the Y axis of the rectangular coordinate system and is a straight line O 2 b coincides with the X-axis of the rectangular coordinate system.
Obviously, the point a is a stressed fulcrum before the plate belt enters the roll-in position after being wound by one circle, the first ring of the plate belt enters the roll-in position through the point a, and the position of the first ring of the plate belt contacting with the head plate belt can be understood as a point 2, the span of two points is obviously shortened by more than half in large probability relative to the span distance of the two points of the invisible and non-invisible symmetrical roll-in positions, and the effect of eliminating shoulder marks is obvious.
Further, preferably, according to the requirement of the positioning accuracy of the device, the length of the roll-in position structure from point a to point b is generally controlled to be 30mm to 60mm, the height difference (h = t + λ) of point a and point b in the Y axis direction is in the range of 1.5mm to 4.5mm (where t is the plate thickness, and t =0.5mm to 3.5mm, λ =1mm, but not limited thereto, the values are optimized according to the thickness specification and the plate strip strength of different plate strips, as long as the following relational expression is satisfied, h =0 to (t + λ), where t is the plate strip thickness in mm, λ =0.5mm to 2mm, and point a takes a high value according to the roll-in position direction of the diagram (fig. 1), point b can approach zero (actually influenced by the die manufacturing, and the minimum error is less than 0.1 mm); along the Y-axis direction, O 2 The distance H between the point and the outer surface of the sleeve 1 is 10 mm-20 mm; straight line O 1 b and a straight line O 1 The included angles between the c and the Y axes are respectively 5-20 degrees.
In this embodiment, it is preferred that the first and second parts,as shown in fig. 1, the sleeve 1 comprises a base layer 11 and an outer surface layer 12 arranged from inside to outside, and a hidden cavity 13, namely cbO, is formed between the base layer 11 and the outer surface layer 12 2 The region within b 'c' is the base layer 11,cbab 'and the region outside c' is the outer skin layer 12,O 2 ab is a hollow invisible cavity 13, and further, preferably, the invisible cavity 13 is a cavity (or a filling cavity, that is, the cavity can be filled with some material to form a filling cavity) O 2 ab is kept away from the enhancement layer that the center of sleeve 1 was laid the fusibility net twine or screen cloth promptly, and vulcanizes the shaping with the colloid of extexine 12 together, adopts high performance net twine or screen cloth material reinforcing between the colloid, is applicable to the anti-cracking reinforcing of other general class's sleeve 1 equally, but the prerequisite is when playing effectual reinforcing effect, can not influence the normal harmomegathus of sleeve 1 and the problem that does not take place to influence product quality. (note: when the sleeve 1 is manufactured, the blank of the base layer 11 is firstly manufactured, then the manufactured roll-in hollow mould is implanted into the appointed position, namely the position of the invisible cavity 13, then the processing at the bc (b 'c') position and the outer rubber layer coating are carried out, the outer circle (column) surface and other inner and outer processing are finished after the whole is vulcanized, finally the mould is taken out, finally, the manufactured sleeve 1 has the structure of the base layer 11 and the outer surface layer 12, the outer surface layer 12 is soft generally, so that the contact condition of the metal plate strip and the rubber sleeve surface is improved, and the requirements corresponding to normal operation and formation of transverse folding reduction are met;
the joint point of the glue layers of the base layer 11 and the outer surface layer 12 is C, and the distance between the point C and the outer surface of the sleeve 1 along the diameter direction of the sleeve 1 is 1 mm-15 mm, namely, the distance between the point C and the outer layer can be selected from 1 mm-15 mm;
the points b and c may be misaligned or may be coincident in special cases, such as misalignment (i.e., R is not coincident) O1c ≧R O1b And R is O1c -R O1b =0mm to 20 mm), in the bc region, a certain base layer 11 can be cut off by using a linear change transition. Note that: an invisible asymmetric coil-in position is manufactured: (1) The length (from b to c) of the curve section (of the arc-shaped area) of the partial cut-off of the base layer 11 can be controlled within the range of 0 mm-80 mm, and the curve section is not easy to overlong and is not easy to overlookIf the length is long, the complexity of manufacturing is increased, and no practical significance is realized; (2) First of all with O 2 a = h/2, and a line segment O is determined 2 a is represented by O 2 a, the midpoint of the point a is used as an origin, h/2 is used as a radius, and a semicircular curve segment is determined in the right area of the Y axis, or O is used 2 Taking h as the diameter as the origin, determining a semicircular curve section in the right area of the Y axis, wherein h =0 to (t + lambda), wherein t is the plate strip thickness in mm, and lambda =0.5mm to 2mm;
further, it is preferable that the hardness of the base layer 11 is greater than that of the outer surface layer 12, and a design having a hardness difference with respect to the base layer 11 is adopted, in order to form the strip in the roll-in region to more easily eliminate the deformation of the raised rubber surface layer of the strip head, including improving the contact performance between the surface of the rubber sleeve and the strip, increasing the friction angle during operation, and preventing the reduction of the positioning accuracy and the instability of operation due to possible slipping of the strip head, thereby ensuring smooth operation and accurate reduction of the cross-cut mark.
Generally, on the premise of meeting the parameters of the reeling equipment and normal operation, the layer number and the hardness parameter of the basic layer 11 can be designed according to specific requirements, the basic layer 11 can be single-layer hardness or multi-layer hardness, and on the premise that the rubber sleeve consisting of the layers ensures the realization of the reduction index of the cross-cut print, the stable operation of the rubber sleeve under the load must be ensured.
In combination with the above, through the design of the hollow (filling layer) area of the section of the rolling-in position and the related parameters, the sleeve 1 can obtain the indexes required by the rolling surface cross-printing decrement of the high-end metal plate strip at home and abroad at present, including but not limited to the metal plate strip with the thickness specification of 0.5 mm-3.5 mm, including but not limited to the tensile strength grade sigma b Is 135kg/cm 2 ～670 kg/cm 2 The cross-crease decrement requirement outside the range is that the number of cross-crease meters is less than or equal to 15 meters per roll (non-average) visible to naked eyes under oilstone polishing. Also note that: the technology is not limited to the application of reducing the cross crease mark in the process of coiling the metal coil with the inner diameter of 610mm, and can also be applied to the process of coiling the metal plate strip with the inner diameter of 500-810 mm.
In combination with the foregoing, further, preferably, as shown in fig. 2, the diameter D (2R) =583 ± 1.5mm of the sleeve 1, the length L =2050mm, the hardness of the base layer 11 of the sleeve 1 is SHA85 ± 5, and the hardness of the outer surface layer 12 of the sleeve 1 is SHA60 ± 5 (SHA is shore hardness, also called shore hardness);
the distance H of the point c from the outer surface of the sleeve 1 in the diameter direction of the sleeve 1 c Is 10mm; width B of invisible asymmetric rolling position, namely line segment O 2 Length LO of b 2 b, taking 30mm; radius R of semicircular line segment 3 =1.3mm (i.e. line segment O) 2 Half the length of a), that is, line segment O 2 a length of hO 2 a＝2R 3 =2.6mm; h of point b b = 0.12-0.14 (projection of point b on Y axis and O) 2 Height difference between dots); along the Y-axis direction, O 2 The distance H =15mm from the outer surface of the sleeve 1; from O 2 The distance between the point and the point b in the X-axis direction was 5mm (X in each case) N =0, 1, 2, 3, 4, 5, note: o corresponding to the number 0 2 Point, number 4 corresponds to point b), since there will be machining deviation in the actual machining process, O will be added 2 B, dividing the point to b into preset equal parts, so that the deviation can be evenly shared, and the processing precision is ensured;
from point b to point c, and the angle of the arc on the layered surface at point c is 13 °, a plurality of bisectors of the arc length are determined at 1 ° intervals, the intersection of these bisectors and the arc on the layered surface at point c serves as the processing reference point (that is, the angle bo =13 °, then ═ bo c is divided into 13 halves by the plurality of bisectors, and each bisector has an angle of 1 °), and the numbers are given in the order of 0', 1', 2', 3', 4', 5', 6', 7', 8', 9', 10', 11', 12', and 13' (where the number 0 'corresponds to b and the number 13' corresponds to point c) in the direction of point b toward point c, and h is taken 12 '＝0.14、h 11 '＝0.35、h 10 '＝0.55、h 9 '＝0.75、h 8 '＝0.95、h 7 '＝1.15、 h 6 '＝1.35、h 5 '＝1.55、h 4 '＝1.75、h 3 '＝1.95，h 2 '＝2.15、h 1 '＝2.35、h 0 '=2.55 (the series of h' values generation mentioned above)The table is: r O1C -R O1N Wherein R is O1N Representative of the above points and the origin O 1 The distance between the two, that is, the series of h' values represent the radius difference, and the value obtained according to the quasi-linearity has the advantage that the machining error can be effectively reduced).
On the basis of the data, when the sleeve 1 is actually manufactured, firstly, the blank manufacturing of the base layer 11 is completed, and then the manufactured coiling position hollow mould is implanted into a specified position, and the specific implantation process is as follows: defined by bO in the base layer 11 of the sleeve 1 2 And then the line segment bO 2 According to point b towards point O 2 Point is extended to point b 'and line segment b' O is made 2 ' = line segment bO 2 The curve b 'c' on the right side is symmetrically processed according to the shape of the curve bc on the left side, and the bO on the left side 2 After the die is bound at the position, the outer rubber layer is encapsulated, the outer circle (column) surface and other inner and outer processing are completed after the whole vulcanization, and finally the die is taken out.
Example two
The second embodiment provides a rubber sleeve which is an improvement on the first embodiment, technical contents disclosed in the first embodiment are not described repeatedly, and the contents disclosed in the first embodiment also belong to the contents disclosed in the second embodiment.
In this embodiment, preferably, hO is used 2 a＝2R 3 =3.8mm, hb =0.1mm (hb means in Y-axis direction, it is parallel to O 2 Height difference between points), H =16mm, and other values are calculated according to the technical method, so that the user satisfaction index of eliminating the transverse crease of the plate strip with the thickness of 1.5 mm-2.3 mm is realized.
EXAMPLE III
Referring to fig. 3, the rubber sleeve provided in the embodiment is an improvement on the basis of the first embodiment, the technical contents disclosed in the first embodiment are not described repeatedly, and the contents disclosed in the first embodiment also belong to the contents disclosed in the second embodiment.
In this embodiment, preferably, as shown in fig. 3, in the direction of the same sleeve 1, which forms an angle of 180 ° with the invisible cavities 13 in the first embodiment, the invisible non-opposite-entering rolling positions with the same direction and consistent parameters are configured, that is, in this embodiment, there are two invisible cavities 13, and the two invisible cavities 13 are uniformly distributed along the circumferential direction of the sleeve 1.
The advantage of adopting above-mentioned structure lies in: when one of the rubber sleeve 1 is used for a long time and is in a high-stress working state for a long time, after the shoulder mark exceeds the standard due to the fact that the material in the coiling position area is in extreme fatigue, the spare coiling position can be used instead, and therefore the service life of the rubber sleeve 1 cannot be totally failed due to the failure of one coiling position. From experience of use, such an arrangement is generally not more than two in combination.
Example four
Referring to fig. 4, the rubber sleeve provided by the embodiment is an improvement on the basis of the first embodiment, technical contents disclosed in the first embodiment are not described repeatedly, and the contents disclosed in the first embodiment also belong to the contents disclosed in the present embodiment.
In this embodiment, preferably, as shown in fig. 4, the sleeve 1 is annular, the number of the invisible cavities 13 is two, and the two invisible cavities 13 are oppositely arranged along the circumferential direction of the sleeve 1, that is, the sleeve is provided with a plurality of invisible cavities 13. The invisible asymmetric roll-in position with the same structure, namely the same size parameter but opposite direction, is arranged in a region (which can be in a 180-degree direction or other properly distributed positions) with a certain interval with an invisible asymmetric roll-in position region on the sleeve 1 (section), detection and switching are realized through electric control, and the requirement of reducing the cross-folded prints by using the invisible asymmetric roll-in position can be met under the requirement of bidirectional roll-up.
Therefore, the structure belongs to an invisible asymmetric reverse (different position) rolling position two-position combined structure, and in the form, the specification ranges of the corresponding rolled plate strips are the same, so that the bidirectional rolling can be met.
The reason for adopting the above structure is that: the dominant and invisible asymmetric coil feeding position structures have direction requirements on coiling, general production line coiling equipment needs a forward and reverse coiling function in order to meet the requirement of delivery state that one side is the outer surface of a coil when different surfaces of a plate strip are coiled, and if the dominant and invisible asymmetric coil feeding position structures are not symmetric, the limitation on the coil feeding direction exists. Since the direction of the asymmetric winding position cannot be changed by changing the installation direction of the sleeve 1 in the production process, in order to meet the requirement of bidirectional winding, the invisible asymmetric winding position in two directions is adopted in the embodiment to meet the requirement.
Of course, without being limited thereto, more reeling-in multi-bit combination structures can be theoretically realized, and in practical application, the combination can be combined according to actual requirements.
EXAMPLE five
Referring to fig. 5, the rubber sleeve provided by the embodiment is an improvement on the first embodiment, technical contents disclosed in the first embodiment are not described repeatedly, and the first embodiment also belongs to the disclosure of the embodiment.
In this embodiment, preferably, as shown in fig. 5, the rubber sleeve provided in this embodiment has an invisible rolling-in position, and also has an explicit rolling-in position, specifically, the outer surface of the sleeve 1 is formed with a missing portion 14 recessed toward the inside thereof (the glue removing region may be processed smoothly according to a rule, and finally the missing portion 14 is formed), so as to form the explicit rolling-in position, and the explicit rolling-in position and the invisible rolling-in position form an angle of 180 ° along the circumferential direction of the sleeve 1, of course, not only this is limited, but also the rubber sleeve may be designed according to actual needs.
Therefore, the combined structure of the invisible coiling position and the visible coiling position meets different use requirements.
Example six
Referring to fig. 6 and 7, the rubber sleeve provided in the present embodiment is an improvement on the basis of the first embodiment, the technical contents disclosed in the first embodiment are not described repeatedly, and the contents disclosed in the first embodiment also belong to the contents disclosed in the present embodiment.
In this embodiment, preferably, as shown in fig. 6 and 7, the invisible cavity 13 is formed with a symmetrical structure with respect to the Y-axis of the rectangular coordinate system.
It can be seen that the two invisible cavities 13 are communicated to form an invisible symmetrical roll-in position structure, and then the invisible cavities 13 on one side can be adjusted on site, that is, one of the invisible cavities 13 is filled with filling materials 3 such as rubber and the like, so that the performance of the invisible symmetrical roll-in position structure and the invisible asymmetrical roll-in position structure can be recovered, the dynamic switching of the invisible symmetrical roll-in position structure and the invisible asymmetrical roll-in position structure can be realized, the original invisible symmetrical roll-in position structure can be changed into the invisible asymmetrical roll-in position structure, and therefore higher cross-fold print decrement indexes can be obtained.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. The rubber sleeve is characterized by comprising a sleeve, wherein an invisible cavity is formed in the inner structure of the sleeve away from the outer surface of the sleeve by a preset depth;
the section of the invisible cavity along the length direction perpendicular to the sleeve is a cross section, and the cross section of the invisible cavity is gradually reduced along the winding direction of the metal strip head so as to form an invisible winding position.
2. The gum cover of claim 1, wherein the cross section of the invisible cavity is a structure defined by sequentially connecting an arc line segment, a curve line segment and a straight line segment end to end, wherein the arc line segment is a semicircular line segment or a quarter circular line segment.
3. The gum cover of claim 2, wherein the sleeve is circular and has a rectangular coordinate system on a cross section perpendicular to the length direction thereof, and the origin O of the rectangular coordinate system 1 The Y axis of the rectangular coordinate system is arranged along the radial direction of the sleeve;
the intersection point of the arc line segment and the straight line segment is O 2 The intersection point of the arc line segment and the curve line segment is a, and the intersection point of the curve line segment and the straight line segment is b;
straight line O 2 a is coincident with the Y axis of the rectangular coordinate system and has a straight line O 2 b coincides with the X-axis of the rectangular coordinate system.
4. The gum cover of claim 3, wherein along the Y-axis direction, O 2 The distance H between the point and the outer surface of the sleeve is 10 mm-20 mm;
line segment O 2 The length of b is 30 mm-80 mm.
5. The rubber sleeve according to claim 3, wherein the sleeve comprises a base layer and an outer surface layer arranged from inside to outside, and the invisible cavity is formed between the base layer and the outer surface layer;
the joint of the glue layers of the base layer and the outer surface layer is c, and the distance between the c point and the origin of the rectangular coordinate system is larger than or equal to the distance between the b point and the origin of the rectangular coordinate system.
6. The gum cover of claim 5, wherein the line O is straight 1 b and a straight line O 1 The included angles between the c and the Y axis are respectively 5 degrees to 20 degrees;
the distance from the point c to the outer surface of the sleeve is 1-15 mm along the radial direction of the sleeve;
R O1c -R O1b =0mm to 20mm; the length of a curve segment between the point c and the point b is 0 mm-80 mm;
along the Y-axis, a point and O 2 The height difference between the points is h =0 to (t + lambda), wherein t is the thickness of the plate strip and is in mm, and lambda =0.5 mm-2 mm.
7. The gum cover of claim 5, wherein the hardness of the base layer is greater than the hardness of the outer skin layer; and/or
And a reinforcing layer of fusion mesh or mesh cloth is laid on one side of the invisible cavity far away from the center of the sleeve, and is vulcanized and molded together with the colloid on the outer surface layer.
8. The gum cover of claim 3, wherein the invisible cavity is formed with a symmetrical structure about the Y-axis of the rectangular coordinate system.
9. The gum cover of any one of claims 1 to 8, wherein the invisible cavities are plural in number and are arranged in the same direction along the circumference of the sleeve; or
The invisible cavities are multiple in number, and two invisible cavities can be arranged in the circumferential direction of the sleeve in an opposite mode.
10. The gum cover of any one of claims 1 to 8 wherein the outer surface of the sleeve is formed with a relief recessed towards its interior to form an overt roll-in position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222050697.6U CN217990451U (en) | 2022-08-05 | 2022-08-05 | Rubber sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222050697.6U CN217990451U (en) | 2022-08-05 | 2022-08-05 | Rubber sleeve |
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| Publication Number | Publication Date |
|---|---|
| CN217990451U true CN217990451U (en) | 2022-12-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222050697.6U Active CN217990451U (en) | 2022-08-05 | 2022-08-05 | Rubber sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217990451U (en) |
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2022
- 2022-08-05 CN CN202222050697.6U patent/CN217990451U/en active Active
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