Honeycomb plate, honeycomb plate forming method and honeycomb plate forming device

Abstract

The invention provides a cellular board, a cellular board forming method and a cellular board forming device.The cellular board comprises a template and a plurality of longitudinal protrusions arranged on the template, the longitudinal protrusions extend in the length direction of the template and are arranged at intervals in the width direction of the template, and the longitudinal protrusions extend in the length direction of the template. The cross section of each longitudinal protrusion comprises a waist portion located on the lower side and a head portion located on the upper side, the transverse size of each waist portion is smaller than that of each head portion, the top face of each head portion is a plane, the heads of the longitudinal protrusions define a first supporting face, the template defines a second supporting face, and the first supporting face and the second supporting face are perpendicular to each other. The first supporting face and the second supporting face are used for being connected with a supporting plate. By means of the technical scheme, face-to-face contact between the honeycomb plate and the supporting plate can be achieved, and the structural strength is high.

Description

Technical Field

[0001] The invention relates to a honeycomb panel, a forming method and a forming device of the honeycomb panel. Background Art

[0002] Honeycomb materials are widely used in many fields that require lightweight due to their advantages such as light weight, high stiffness / mass ratio and strength / mass ratio, and high compressive strength, such as aramid honeycombs and aluminum honeycombs on airplanes, thermoplastic PP honeycombs in the field of transportation, paper honeycombs in the packaging industry, and backing plates for lightweight components in the photovoltaic industry. Honeycomb panels generally have double-layer thin plates and a honeycomb structure arranged between the double-layer thin plates. In the prior art, there have been structures that are formed by protruding from a single plate, with the protruding structure as the honeycomb structure and the base of the plate as the thin plate, and their applications are becoming more and more extensive. However, the protruding structure is generally simpler, roughly V-shaped or U-shaped. For the V-shaped or U-shaped array-type protruding structure, the top of the protruding structure is in line-surface contact or point-surface contact with the thin plate, and its structural strength is relatively low. Although there is a demand for more complex protruding structures in the market, the molding equipment is relatively complex and cannot be mass-produced. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies in the above-mentioned prior art and to provide a honeycomb panel, a forming method and a forming device for the honeycomb panel.

[0004] In order to solve the above technical problems, the present invention provides a honeycomb panel, which includes a mold plate and a plurality of longitudinal protrusions arranged on the mold plate, the plurality of longitudinal protrusions extend along the length direction of the mold plate, the plurality of longitudinal protrusions are arranged at intervals along the width direction of the mold plate, the cross-section of the longitudinal protrusions includes a waist located on the lower side and a head located on the upper side, the lateral dimension of the waist is smaller than the lateral dimension of the head, the top surface of the head is flat, the heads of the plurality of longitudinal protrusions define a first supporting surface, the mold plate defines a second supporting surface, and the first supporting surface and the second supporting surface are respectively used to connect the support plate.

[0005] In a more preferred embodiment, the longitudinal protrusion and the template are transitioned through an arc shape.

[0006] The present invention also provides a forming method of a honeycomb panel, the honeycomb panel comprising a mold plate and a plurality of longitudinal protrusions arranged on the mold plate, the plurality of longitudinal protrusions extending along the length direction of the mold plate, the plurality of longitudinal protrusions being arranged at intervals along the width direction of the mold plate, the cross section of the longitudinal protrusions comprising a waist located at the lower side and a head located at the upper side, the transverse dimension of the waist being smaller than the transverse dimension of the head, the top surface of the head being plane, the heads of the plurality of longitudinal protrusions defining a first supporting surface, the mold plate defining a second supporting surface, the first supporting surface and the second supporting surface being respectively used for connecting a support plate;

[0007] The forming method includes a method for forming a longitudinal protrusion: S1: forming a protrusion on a mold plate; S2: pressing two sides of the bottom of the protrusion towards each other to form the longitudinal protrusion.

[0008] In a more preferred embodiment, the molding method includes a method for molding multiple longitudinal protrusions: S31: molding a group of longitudinal protrusions on a mold plate; S32: molding two of the longitudinal protrusions on both sides of the previous group of longitudinal protrusions; S32: repeating step S32 once or multiple times to sequentially form multiple longitudinal protrusions.

[0009] The present invention also provides a forming device for a honeycomb panel, the honeycomb panel comprising a template and a plurality of longitudinal protrusions arranged on the template, the plurality of longitudinal protrusions extending along the length direction of the template, the plurality of longitudinal protrusions being arranged at intervals along the width direction of the template, the cross section of the longitudinal protrusions comprising a waist located at the lower side and a head located at the upper side, the transverse dimension of the waist being smaller than the transverse dimension of the head, the top surface of the head being plane, the heads of the plurality of longitudinal protrusions defining a first supporting surface, the template defining a second supporting surface, the first supporting surface and the second supporting surface being respectively used for connecting a support plate;

[0010] The forming device comprises a frame and a plurality of forming rollers, wherein the plurality of forming rollers are arranged on the frame in sequence along a conveying direction;

[0011] The molding device further includes a molding die set, the molding die set includes a first molding die, a second molding die, a third molding die and a fourth molding die, the first molding die, the second molding die, the third molding die and the fourth molding die are sequentially arranged on four adjacent molding rollers along a conveying direction;

[0012] The first molding die, the second molding die and the third molding die sequentially form three first molding gaps with gradually increasing protrusion heights, and the mold plate sequentially passes through the three first molding gaps to form a protrusion. The fourth molding die includes a second molding gap, and the second molding gap includes an upper head gap and a lower waist gap. The lateral dimension of the lower waist gap is smaller than the lateral dimension of the upper head gap, and the protrusion passes through the second molding gap to form the longitudinal bulge.

[0013] In a more preferred embodiment, every four of the forming rollers form a forming roller group, and the multiple forming roller groups are arranged in sequence along the conveying direction. A forming module group is provided in the middle position of the first forming roller group; the latter forming roller group adds two corresponding forming modules on both sides of the longitudinal protrusion formed by the previous forming roller group, so as to be able to form multiple longitudinal protrusions in sequence.

[0014] In a more preferred embodiment, the molding roller includes an upper rotating shaft and a lower rotating shaft, and the first molding die, the second molding die, the third molding die and the fourth molding die all include a concave molding groove and a convex molding block, the concave molding groove is arranged on the upper rotating shaft, and the convex molding block is arranged on the lower rotating shaft, and the first molding gap or the second molding gap is formed between the concave molding groove and the convex molding block.

[0015] In a more preferred embodiment, the first molding die, the second molding die, the third molding die and the fourth molding die all include pressing wheels located on both sides of the concave molding groove.

[0016] In a more preferred embodiment, fixed frames are respectively provided at both ends of the upper rotating shaft, and the fixed frame is connected to the upper rotating shaft through bearings; a guide column is provided at the upper end of the fixed frame, and a spring is connected to the outer sleeve of the guide column, and the guide column is vertically guided and connected to the frame, and the spring abuts between the fixed frame and the frame, and the spring drives the pressure wheel of the upper rotating shaft to press against the lower rotating shaft.

[0017] In a more preferred embodiment, a first gear is disposed at both ends of the upper rotating shaft, and a second gear is disposed at both ends of the lower rotating shaft, and the first gear is meshed with the second gear so that the upper rotating shaft and the lower rotating shaft rotate in opposite directions.

[0018] In a more preferred embodiment, the honeycomb panel includes 7 longitudinal protrusions extending along the length direction; the forming device includes 4 forming roller groups;

[0019] The honeycomb panel further comprises a left overlap portion and a right overlap portion located on the left and right sides, wherein the left overlap portion and the right overlap portion are mirror-symmetrical S-shaped protrusions; when the honeycomb panels are sequentially connected along the width direction, the left overlap portion and the right overlap portion are overlap-connected with each other;

[0020] The molding device further includes an overlapping molding die set, the overlapping molding die set includes a fifth molding die, a sixth molding die, a seventh molding die and an eighth molding die, and the fifth molding die, the sixth molding die, the seventh molding die and the eighth molding die are arranged in sequence along the conveying direction;

[0021] The fifth molding die, the sixth molding die, and the seventh molding die sequentially form three third molding gaps with gradually increasing protrusion heights, the third molding gaps are respectively located on both sides of the mold plate, and both sides of the mold plate sequentially pass through the three third molding gaps to form an end protrusion, the eighth molding die includes a fourth molding gap, the fourth molding gap is Z-shaped, and the end protrusion passes through the fourth molding gap to form the S-shaped protrusion.

[0022] In a more preferred embodiment, the template is an aluminum plate.

[0023] In a more preferred embodiment, the forming device further comprises a cutting mechanism, and the cutting mechanism is located after the last forming roller.

[0024] In a more preferred embodiment, a finished product bracket is further included, and the finished product bracket is located behind the cutting mechanism.

[0025] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0026] The honeycomb panel is sandwiched between two support plates, and the support plates are in surface contact with the first support surface or the second support surface, so the support strength is good.

[0027] The forming device comprises a frame and a plurality of forming rollers, wherein the plurality of forming rollers are sequentially arranged on the frame along a conveying direction; the forming device further comprises a forming die set, wherein the forming die set comprises a first forming die, a second forming die, a third forming die and a fourth forming die, wherein the first forming die, the second forming die, the third forming die and the fourth forming die are sequentially arranged on four adjacent forming rollers along the conveying direction; the first forming die, the second forming die and the third forming die sequentially form three first forming gaps with gradually increasing ridge heights, and a mold plate sequentially passes through the three first forming gaps to form a ridge The fourth molding die includes a second molding gap, the second molding gap includes an upper head gap and a lower waist gap, the lateral dimension of the lower waist gap is smaller than the lateral dimension of the upper head gap, and the raised part passes through the second molding gap to form the longitudinal protrusion; every four molding rollers form a molding roller group, and the multiple molding roller groups are arranged in sequence along the conveying direction, and a molding module group is arranged in the middle position of the first molding roller group; the latter molding roller group adds two molding modules on both sides of the longitudinal protrusion formed by the previous molding roller group, so as to form multiple longitudinal protrusions in sequence.

[0028] The present application forms the raised part first and then performs roller forming on the waist of the raised part, so the forming speed is fast and the production is convenient.

[0029] By gradually forming new longitudinal protrusions on both sides of the longitudinal protrusion, it is ensured that the material will not break or deform due to excessive longitudinal protrusions formed at one time during the molding process, which is suitable for large-scale production. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic cross-sectional view of a honeycomb panel in a preferred embodiment of the present invention;

[0031] Figure 2 A side view of a molding device in a preferred embodiment of the present invention;

[0032] Figure 3 This is a forming flow chart of a honeycomb panel in a preferred embodiment of the present invention;

[0033] Figure 4 This is a molding flow chart of a mold plate in a preferred embodiment of the present invention, which passes through a first molding die, a second molding die, a third molding die, and a fourth molding die in sequence;

[0034] Figure 5 A schematic diagram of a forming roller in a preferred embodiment of the present invention;

[0035] Figure 6 It is a partial schematic diagram of the first molding die in the preferred embodiment of the present invention;

[0036] Figure 7 It is a partial schematic diagram of the second molding die in a preferred embodiment of the present invention;

[0037] Figure 8 It is a partial schematic diagram of the third molding die in the preferred embodiment of the present invention;

[0038] Fig. 9 It is a partial schematic diagram of the fourth molding die in the preferred embodiment of the present invention;

[0039] Fig.10 It is a three-dimensional schematic diagram of a fifth molding die provided in a preferred embodiment of the present invention;

[0040] Fig.11 It is a partial schematic diagram of the fifth molding die in the preferred embodiment of the present invention;

[0041] Fig.12 It is a partial schematic diagram of the sixth molding die in the preferred embodiment of the present invention;

[0042] Fig.13 It is a partial schematic diagram of the seventh molding die in the preferred embodiment of the present invention;

[0043] Fig.14 It is a schematic diagram of the eighth molding die in the preferred embodiment of the present invention. DETAILED DESCRIPTION

[0044] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0045] See also Figure 1-Figure 14 A honeycomb panel 20 includes a mold plate and a plurality of longitudinal protrusions 210, wherein the plurality of longitudinal protrusions 210 extend along the length direction of the mold plate, and the plurality of longitudinal protrusions 210 are arranged at intervals along the width direction. The cross section of the longitudinal protrusion 210 includes a waist 2101 located at the lower side and a head 2102 located at the upper side, and the lateral dimension of the waist 2101 is smaller than the lateral dimension of the head 2102. The longitudinal protrusion 210 and the mold plate are transitioned by an arc. The top surface of the head 2102 is a plane, and the heads 2102 of the plurality of longitudinal protrusions 210 define a first supporting surface, and the mold plate defines a second supporting surface, and the first supporting surface and the second supporting surface are respectively used to connect the support plate. The support plate is a thin plate, etc., and the honeycomb panel is sandwiched between two support plates, and the support plate and the first supporting surface or the second supporting surface are in surface-to-surface contact, and the support strength is good.

[0046] The forming method of the honeycomb panel 20 comprises S1: forming a raised portion on a mold plate; S2: pressing two sides of the bottom of the raised portion towards each other to form a longitudinal protrusion.

[0047] The molding method includes a method for molding multiple longitudinal protrusions: S31: molding a group of longitudinal protrusions on a mold plate; S32: molding two of the longitudinal protrusions on both sides of the previous group of longitudinal protrusions; S32: repeating step S32 once or multiple times to sequentially form multiple longitudinal protrusions.

[0048] The forming device of the honeycomb panel comprises a frame 1 and a plurality of forming rollers 2, wherein the plurality of forming rollers 2 are sequentially arranged on the frame 1 along a conveying direction; the forming device further comprises a forming module group, wherein the forming module group comprises a first forming module 31, a second forming module 32, a third forming module 33 and a fourth forming module 34, wherein the first forming module 31, the second forming module 32, the third forming module 33 and the fourth forming module 34 are sequentially arranged on four adjacent forming rollers 2 along the conveying direction; the first forming module 31, the second forming module 32 and the third forming module 33 sequentially form three first forming gaps 41 with gradually increasing ridge heights, and a mold plate sequentially passes through the three first forming gaps 41 to form a ridge portion 240, the fourth molding die 34 includes a second molding gap 42, the second molding gap 42 includes an upper head gap 421 and a lower waist gap 422, the lateral dimension of the lower waist gap 422 is smaller than the lateral dimension of the upper head gap 421, and the raised portion 240 passes through the second molding gap 42 to form the longitudinal protrusion 210; every four molding rollers 2 form a molding roller group, and multiple molding roller groups are arranged in sequence along the conveying direction, and a molding module group is arranged in the middle position of the first molding roller group; the latter molding roller group adds two molding modules corresponding to the two sides of the longitudinal protrusion 210 formed by the previous molding roller group, so that multiple longitudinal protrusions 210 can be formed in sequence.

[0049] The molding roller 2 includes an upper rotating shaft 21 and a lower rotating shaft 22. The first molding die 31, the second molding die 32, the third molding die 33 and the fourth molding die all include a concave molding groove 51 and a convex molding block 52. The concave molding groove 51 is arranged on the upper rotating shaft 21, and the convex molding block 52 is arranged on the lower rotating shaft 22. The first molding gap 41 or the second molding gap 42 is formed between the concave molding groove 51 and the convex molding block 52.

[0050] The first molding die 31, the second molding die 32, the third molding die 33 and the fourth molding die all include pressure wheels 53 located on both sides of the concave molding groove 51. A fixing frame 6 is provided at both ends of the upper rotating shaft 21, and the fixing frame 6 is connected to the upper rotating shaft 21 through a bearing; a guide column 61 is provided at the upper end of the fixing frame 6, and a spring 62 is connected to the outer surface of the guide column 61. The guide column 61 is vertically guided and connected to the frame 1, and the spring 62 abuts between the fixing frame 6 and the frame 1, and the spring 62 drives the pressure wheel 53 of the upper rotating shaft 21 to press against the lower rotating shaft 22. A first gear is provided at both ends of the upper rotating shaft 21, and a second gear is provided at both ends of the lower rotating shaft 22. The first gear is meshed with the second gear so that the upper rotating shaft 21 and the lower rotating shaft 22 rotate in opposite directions.

[0051] The honeycomb panel 20 includes 7 longitudinal protrusions 210 extending along the length direction; the forming device includes 4 forming roller groups; the honeycomb panel 20 also includes a left overlap portion 220 and a right overlap portion 230 located on the left and right sides, and the left overlap portion 220 and the right overlap portion 230 are mirror-symmetrical S-shaped protrusions; when the honeycomb panels 20 are connected in sequence along the width direction, the left overlap portion 220 and the right overlap portion 230 are overlapped and connected to each other; the forming device also includes an overlap forming module, and the overlap forming module includes a fifth forming mold 71, a sixth forming mold 72, a seventh forming mold 73 and an eighth forming mold 74, The fifth molding die 71, the sixth molding die 72, the seventh molding die 73 and the eighth molding die 74 are arranged in sequence along the conveying direction; the fifth molding die 71, the sixth molding die 72 and the seventh molding die 73 sequentially form three third molding gaps 75 with gradually increasing protrusion heights, and the third molding gaps 75 are respectively located on both sides of the mold plate, and both sides of the mold plate sequentially pass through the three third molding gaps 75 to form an end protrusion, and the eighth molding die 74 includes a fourth molding gap 76, and the fourth molding gap 76 is Z-shaped, and the end protrusion passes through the fourth molding gap 76 to form the S-shaped protrusion.

[0052] In this embodiment, the template is an aluminum plate.

[0053] The forming device further comprises a cutting mechanism 8 , and the cutting mechanism 8 is located behind the last forming roller 2 .

[0054] The forming device further comprises a finished product bracket 9 , and the finished product bracket 9 is located behind the cutting mechanism 8 .

[0055] The above is only a preferred specific implementation of the present invention, but the design concept of the present invention is not limited to this. Any technician familiar with the technical field who uses this concept to make non-substantial changes to the present invention within the technical scope disclosed by the present invention shall be deemed to infringe the protection scope of the present invention.

Claims

1. A honeycomb panel, characterized in that: The honeycomb panel includes a mold plate and a plurality of longitudinal protrusions arranged on the mold plate, the plurality of longitudinal protrusions extend along the length direction of the mold plate, the plurality of longitudinal protrusions are arranged at intervals along the width direction of the mold plate, the cross-section of the longitudinal protrusions includes a waist located on the lower side and a head located on the upper side, the lateral dimension of the waist is smaller than the lateral dimension of the head, the top surface of the head is flat, the heads of the plurality of longitudinal protrusions define a first supporting surface, the mold plate defines a second supporting surface, and the first supporting surface and the second supporting surface are respectively used to connect the support plate.

2. A honeycomb panel as claimed in claim 1, characterized in that: The longitudinal protrusion and the template are connected via an arc-shaped transition.

3. A method for forming a honeycomb panel, characterized in that: The honeycomb panel comprises a template and a plurality of longitudinal protrusions arranged on the template, the plurality of longitudinal protrusions extend along the length direction of the template, the plurality of longitudinal protrusions are arranged at intervals along the width direction of the template, the cross section of the longitudinal protrusions comprises a waist located at the lower side and a head located at the upper side, the transverse dimension of the waist is smaller than the transverse dimension of the head, the top surface of the head is plane, the heads of the plurality of longitudinal protrusions define a first supporting surface, the template defines a second supporting surface, the first supporting surface and the second supporting surface are respectively used for connecting the support plate; The forming method includes a method for forming a longitudinal protrusion: S1: forming a protrusion on a mold plate; S2: pressing two sides of the bottom of the protrusion towards each other to form the longitudinal protrusion.

4. A method for forming a honeycomb panel as claimed in claim 3, characterized in that: The molding method includes a method for molding multiple longitudinal protrusions: S31: molding a group of longitudinal protrusions on a mold plate; S32: molding two of the longitudinal protrusions on both sides of the previous group of longitudinal protrusions; S32: repeating step S32 once or multiple times to sequentially form multiple longitudinal protrusions.

5. A honeycomb panel forming device, characterized in that: The honeycomb panel comprises a template and a plurality of longitudinal protrusions arranged on the template, the plurality of longitudinal protrusions extend along the length direction of the template, the plurality of longitudinal protrusions are arranged at intervals along the width direction of the template, the cross section of the longitudinal protrusions comprises a waist located at the lower side and a head located at the upper side, the transverse dimension of the waist is smaller than the transverse dimension of the head, the top surface of the head is plane, the heads of the plurality of longitudinal protrusions define a first supporting surface, the template defines a second supporting surface, the first supporting surface and the second supporting surface are respectively used for connecting the support plate; The forming device comprises a frame and a plurality of forming rollers, wherein the plurality of forming rollers are arranged on the frame in sequence along a conveying direction; The molding device further includes a molding die set, the molding die set includes a first molding die, a second molding die, a third molding die and a fourth molding die, the first molding die, the second molding die, the third molding die and the fourth molding die are sequentially arranged on four adjacent molding rollers along a conveying direction; The first molding die, the second molding die and the third molding die sequentially form three first molding gaps with gradually increasing protrusion heights, and the mold plate sequentially passes through the three first molding gaps to form a protrusion. The fourth molding die includes a second molding gap, and the second molding gap includes an upper head gap and a lower waist gap. The lateral dimension of the lower waist gap is smaller than the lateral dimension of the upper head gap, and the protrusion passes through the second molding gap to form the longitudinal bulge.

6. A honeycomb panel forming device as claimed in claim 5, characterized in that: Every four forming rollers form a forming roller group, and multiple forming roller groups are arranged in sequence along the conveying direction. A forming module group is set in the middle position of the first forming roller group; the latter forming roller group adds two forming modules on both sides of the longitudinal protrusion formed by the previous forming roller group, so as to be able to form multiple longitudinal protrusions in sequence.

7. A honeycomb panel forming device as claimed in claim 5 or 6, characterized in that: The molding roller includes an upper rotating shaft and a lower rotating shaft, and the first molding die, the second molding die, the third molding die and the fourth molding die all include a concave molding groove and a convex molding block, the concave molding groove is arranged on the upper rotating shaft, and the convex molding block is arranged on the lower rotating shaft, and the first molding gap or the second molding gap is formed between the concave molding groove and the convex molding block.

8. A honeycomb panel forming device as claimed in claim 7, characterized in that: The first molding die, the second molding die, the third molding die and the fourth molding die all include pressing wheels located on both sides of the concave molding groove.

9. A honeycomb panel forming device as claimed in claim 7, characterized in that: Fixed frames are respectively provided at both ends of the upper rotating shaft, and the fixed frame is connected to the upper rotating shaft through bearings; a guide column is provided at the upper end of the fixed frame, and a spring is connected to the outer sleeve of the guide column, and the guide column is vertically guided and connected to the frame, and the spring abuts between the fixed frame and the frame, and the spring drives the pressure wheel of the upper rotating shaft to press against the lower rotating shaft.

10. A honeycomb panel forming device as claimed in claim 9, characterized in that: A first gear is disposed at both ends of the upper rotating shaft, and a second gear is disposed at both ends of the lower rotating shaft. The first gear is meshed with the second gear so that the upper rotating shaft and the lower rotating shaft rotate in opposite directions.

11. A honeycomb panel forming device as claimed in claim 10, characterized in that: The honeycomb panel comprises 7 longitudinal protrusions extending along the length direction; the forming device comprises 4 forming roller groups; The honeycomb panel further comprises a left overlap portion and a right overlap portion located on the left and right sides, wherein the left overlap portion and the right overlap portion are mirror-symmetrical S-shaped protrusions; when the honeycomb panels are sequentially connected along the width direction, the left overlap portion and the right overlap portion are overlap-connected with each other; The molding device further includes an overlapping molding die set, the overlapping molding die set includes a fifth molding die, a sixth molding die, a seventh molding die and an eighth molding die, and the fifth molding die, the sixth molding die, the seventh molding die and the eighth molding die are arranged in sequence along the conveying direction; The fifth molding die, the sixth molding die, and the seventh molding die sequentially form three third molding gaps with gradually increasing protrusion heights, the third molding gaps are respectively located on both sides of the mold plate, and both sides of the mold plate sequentially pass through the three third molding gaps to form an end protrusion, the eighth molding die includes a fourth molding gap, the fourth molding gap is Z-shaped, and the end protrusion passes through the fourth molding gap to form the S-shaped protrusion.

12. A honeycomb panel forming device as claimed in claim 5, characterized in that: The template is an aluminum plate.

13. A honeycomb panel forming device as claimed in claim 12, characterized in that: The forming device also includes a cutting mechanism, and the cutting mechanism is located behind the last forming roller.

14. A honeycomb panel forming device as claimed in claim 13, characterized in that: It also includes a finished product bracket, which is located behind the cutting mechanism.

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