CN215702431U - Cutting former is used in processing of continuity table tennis bat - Google Patents
Cutting former is used in processing of continuity table tennis bat Download PDFInfo
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- CN215702431U CN215702431U CN202121768121.2U CN202121768121U CN215702431U CN 215702431 U CN215702431 U CN 215702431U CN 202121768121 U CN202121768121 U CN 202121768121U CN 215702431 U CN215702431 U CN 215702431U
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- 238000009434 installation Methods 0.000 claims description 34
- 238000003801 milling Methods 0.000 claims description 23
- 230000000694 effects Effects 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 6
- 206010063659 Aversion Diseases 0.000 abstract description 4
- 238000003754 machining Methods 0.000 abstract description 4
- 238000007493 shaping process Methods 0.000 abstract description 2
- 239000002023 wood Substances 0.000 description 16
- 230000008901 benefit Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 2
- 101100043927 Arabidopsis thaliana SUVH1 gene Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
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Abstract
The utility model discloses cutting and forming equipment for processing a continuous table tennis bat, which comprises a supporting base; supporting the base: the rear side of the movable table is provided with an L-shaped supporting block, the front upper side of the L-shaped supporting block is provided with a descending cutting unit, the upper side of the supporting base is provided with a front-back moving unit, and the left side and the right side of the front end of the movable table in the front-back moving unit are respectively provided with two cutting plate fixing moving units; a descending cutting unit: include step motor one, spacing axle, lead screw cooperation piece, movable block and circular stopper, the preceding upside lower surface of L supporting shoe is equipped with two spacing axles respectively, spacing axle downside tip is equipped with circular stopper, and timber panel cutting accuracy is high, and the bat shaping is effectual, and timber panel cutting range is big, and the cutting utilization ratio is high, and it need not be fixed to the repeated aversion of panel to carry out the recutting to timber panel, can effectively improve the machining efficiency of table tennis bat.
Description
Technical Field
The utility model relates to the technical field of table tennis bat processing and cutting, in particular to cutting and forming equipment for processing a continuous table tennis bat.
Background
Table tennis has originated in the united kingdom and is derived from tennis. It is the british university student who inspires from tennis. The table tennis bat consists of a bottom plate, rubber and sponge, and the quality of the bottom plate determines the overall quality of the table tennis bat.
Table tennis bat is made by the cutting of timber panel, and present timber panel cutting device cutting precision and bat shaping effect are relatively poor, and the fixed back cutting range of timber panel is limited, and timber panel cutting utilization ratio is lower, need repeatedly shift to timber panel when cutting again fixedly, for this reason, we provide a continuity table tennis bat processing with cutting former.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is to overcome the existing defects and provide the cutting and forming equipment for processing the continuous table tennis bat, the wood plate has high cutting precision, the bat forming effect is good, the cutting range of the wood plate is large, the cutting utilization rate is high, the wood plate does not need to be repeatedly shifted and fixed when being cut again, the processing efficiency of the table tennis bat can be effectively improved, and the problems in the background technology can be effectively solved.
In order to achieve the purpose, the utility model provides the following technical scheme: a cutting and forming device for processing a continuous table tennis bat comprises a supporting base;
supporting the base: the rear side of the movable table is provided with an L-shaped supporting block, the front upper side of the L-shaped supporting block is provided with a descending cutting unit, the upper side of the supporting base is provided with a front-back moving unit, and the left side and the right side of the front end of the movable table in the front-back moving unit are respectively provided with two cutting plate fixing moving units;
a descending cutting unit: include step motor one, spacing axle, lead screw cooperation piece, movable block and circular stopper, the preceding upside lower surface of L supporting shoe is equipped with two spacing axles respectively, spacing axle downside tip is equipped with circular stopper, the upper end of L supporting shoe is equipped with step motor one, the output of external power source is connected through outside PLC controller electricity to step motor one's input, the output shaft fixed connection of L supporting shoe and step motor one is passed to the upside tip of lead screw, the surface sliding connection of spacing axle has the movable block, movable block and circular stopper activity joint, the upside of movable block is equipped with the lead screw cooperation piece that corresponds with the lead screw, the threaded connection of lead screw and lead screw cooperation piece.
The descending cutting unit is convenient to approach to cut timber plates, the limiting shaft and the circular limiting block support and limit the moving block, the first stepping motor, the first lead screw and the lead screw matching block are convenient to control the lifting direction and the lifting height of the moving block, and the moving block supports the electric spindle.
Furthermore, the descending cutting unit further comprises an electric spindle, a milling cutter and a cutting groove, the electric spindle is arranged in the middle of the lower side of the moving block, the input end of the electric spindle is electrically connected with the output end of an external PLC (programmable logic controller), the output shaft of the electric spindle is fixedly connected with the milling cutter, and the cutting groove is formed in the upper side of the movable table. The electric spindle provides power for the rotation of the milling cutter, and has the advantages of light weight, high rotation speed, high power, small inertia, low noise, quick response and the like, so that the milling cutter can conveniently cut timber plates, the cutting groove enables the milling cutter to conveniently cut the timber plates, and the milling cutter is prevented from colliding with the movable table.
Furthermore, the back-and-forth moving unit comprises a moving groove, a fixed sliding rod, a moving table, a second stepping motor and a screw rod, the second stepping motor is arranged on the front side of the supporting base, the input end of the second stepping motor is electrically connected with the output end of an external PLC (programmable logic controller), three moving grooves are respectively arranged on the upper side of the supporting base, the three moving grooves are sequentially divided into a first moving groove, a second moving groove and a third moving groove from left to right, the fixed sliding rod is arranged inside the first moving groove and the third moving groove, the front end of the screw rod penetrates through the second moving groove and is fixedly connected with the output shaft of the second stepping motor, the rear end of the screw rod is rotatably connected with a blind hole formed in the rear side of the inside of the moving groove, the moving table is slidably connected with the outer surface of the fixed sliding rod, and the outer surface of the screw rod is in threaded connection with a screw hole formed in the lower side of the moving table. The back-and-forth movement unit is convenient for feeding and cutting of timber plates, the back-and-forth movement unit can guarantee the cutting precision of the timber plates and the forming effect of the racket, the moving groove and the fixed sliding rod limit the moving range and the moving track of the moving table, the stepping motor II and the screw rod are convenient for controlling the feeding direction and the feeding distance of the moving table, and the moving table is convenient for installing the cutting board, fixing the moving unit and the timber plates.
Further, the fixed mobile unit of cutting board includes cylinder installation piece, three step motor, driving roll, support cylinder and mounting groove, the rear side of cylinder installation piece is equipped with three step motor, three step motor's input is connected with the output electricity of outside PLC controller, driving roll rear side transmission shaft passes cylinder installation piece and three step motor's output shaft fixed connection, the blind hole two rotations that driving roll front side transmission shaft and the inside rear side of cylinder installation piece were seted up are connected, the mounting groove has been seted up to the upside of movable table, two support cylinders are established to the inside of mounting groove. The fixed mobile unit of cutting board makes things convenient for the cutting of timber panel to remove, the fixed mobile unit of cutting board is convenient to carry out the cutting again to timber panel, it is fixed not need to repeat the aversion to panel, can improve the machining efficiency of table tennis bat and the utilization ratio of timber panel, mounting groove easy to assemble support cylinder, cylinder installation piece plays the supporting role to step motor three and driving roll, step motor three makes things convenient for the drive driving roll to rotate, driving roll and support cylinder are convenient for remove timber panel.
Further, the fixed mobile unit of cutting board still includes electronic jar and L type installation piece, the front side of movable table is equipped with L type installation piece, the upside of L type installation piece is equipped with electronic jar, the input of electronic jar is connected with the output electricity of outside PLC controller, the flexible end of electronic jar passes L type installation piece and cylinder installation piece fixed connection. The L-shaped mounting block plays a role in supporting and fixing the electric cylinder, and the electric cylinder conveniently controls the lifting height of the roller mounting block.
Further, the height of the side end of the supporting roller is the same as the height of the upper surface of the movable table. The height of the side end of the supporting roller is the same as that of the upper surface of the movable table, so that the wood plate is prevented from inclining, and the processing of the table tennis bat is prevented from being influenced.
Compared with the prior art, the utility model has the beneficial effects that: this continuity table tennis bat processing is with cutting former has following benefit:
1. the descending cutting unit is convenient to approach to cut timber plates, the limiting shaft and the circular limiting block support and limit the moving block, the first stepping motor, the first lead screw and the lead screw matching block are convenient to control the lifting direction and the lifting height of the moving block, and the moving block supports the electric spindle.
2. The electric spindle provides power for the rotation of the milling cutter, and has the advantages of light weight, high rotation speed, high power, small inertia, low noise, quick response and the like, so that the milling cutter can conveniently cut timber plates, the cutting groove enables the milling cutter to conveniently cut the timber plates, and the milling cutter is prevented from colliding with the movable table.
3. The wood plate cutting precision is high, the racket molding effect is good, the wood plate cutting range is large, the cutting utilization rate is high, the wood plate is cut again, repeated shifting of the wood plate is not needed to be fixed, and the processing efficiency of the table tennis racket can be effectively improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic cross-sectional view of a descending cutting unit according to the present invention;
FIG. 3 is a schematic cross-sectional view of a cutting board fixing and moving unit according to the present invention;
FIG. 4 is an enlarged schematic view of the structure at A of the present invention.
In the figure: the cutting machine comprises a supporting base 1, a supporting block 2L, a descending cutting unit 3, a first stepping motor 31, a limiting shaft 32, a lead screw 33, a lead screw matching block 34, a moving block 35, an electric main shaft 36, a milling cutter 37, a circular limiting block 38, a cutting groove 39, a front-back moving unit 4, a movable groove 41, a fixed sliding rod 42, a movable table 43, a second stepping motor 44, a screw 45, a fixed moving unit 5 of a cutting plate, an electric cylinder 51, a roller mounting block 52, a third stepping motor 53, a driving roller 54, a supporting roller 55, a mounting groove 56 and a mounting block 57L.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, the present embodiment provides a technical solution: a cutting and forming device for processing a continuous table tennis bat comprises a supporting base 1;
supporting the base 1: the rear side is provided with an L-shaped supporting block 2, the front upper side of the L-shaped supporting block 2 is provided with a descending cutting unit 3, the upper side of a supporting base 1 is provided with a front-back moving unit 4, the front-back moving unit 4 comprises a movable groove 41, a fixed sliding rod 42, a movable table 43, a second stepping motor 44 and a screw 45, the front side of the supporting base 1 is provided with the second stepping motor 44, the input end of the second stepping motor 44 is electrically connected with the output end of an external PLC (programmable logic controller), the upper side of the supporting base 1 is respectively provided with three movable grooves 41, the three movable grooves 41 are sequentially divided into a first movable groove, a second movable groove and a third movable groove from left to right, the interiors of the first movable groove and the third movable groove are respectively provided with the fixed sliding rod 42, the front side end of the screw 45 penetrates through the second movable groove to be fixedly connected with the output shaft of the second stepping motor 44, the rear side end of the screw 45 is rotatably connected with a blind hole arranged at the rear side in the movable groove 41, the outer surface of the fixed sliding rod 42 is connected with the movable table 43, the outer surface of the screw 45 is in threaded connection with a screw hole formed at the lower side of the movable table 43. The front-back moving unit 4 facilitates feeding and cutting movement of the wood plate, the front-back moving unit 4 can guarantee cutting precision of the wood plate and forming effect of the racket, the moving groove 41 and the fixed sliding rod 42 limit the moving range and moving track of the moving table 43, the stepping motor II 44 and the screw 45 facilitate control of the feeding direction and feeding distance of the moving table 43, and the moving table 43 facilitates installation of the cutting plate fixing moving unit 5 and the wood plate. Two cutting board fixing and moving units 5 are respectively arranged at the left side and the right side of the front end of a movable table 43 in the front-back moving unit 4; cutting board fixed mobile unit 5 includes cylinder installation piece 52, three 53 of step motor, driving roll 54, supporting roll 55 and mounting groove 56, the rear side of cylinder installation piece 52 is equipped with three 53 of step motor, three 53 of step motor's input is connected with the output electricity of outside PLC controller, driving roll 54 rear side transmission shaft passes cylinder installation piece 52 and three 53 of step motor's output shaft fixed connection, driving roll 54 front side transmission shaft rotates with two blind holes of seting up of the inside rear side of cylinder installation piece 52 and is connected, mounting groove 56 has been seted up to the upside of movable table 43, two supporting roll 55 are established to the inside of mounting groove 56. The fixed mobile unit 5 of cutting board makes things convenient for the cutting of timber panel to remove, the fixed mobile unit 5 of cutting board conveniently cuts timber panel again, it is fixed to the repeated aversion of panel, the machining efficiency that can improve table tennis bat and the utilization ratio of timber panel, mounting groove 56 facilitates the installation support cylinder 55, cylinder installation piece 52 plays the supporting role to three 53 of step motor and driving roller 54, three 53 of step motor facilitate the drive driving roller 54 to rotate, driving roller 54 and supporting roller 55 are convenient for remove timber panel. The height of the side end of the support roller 55 is the same as the height of the upper surface of the movable table 43. The height of the side end of the supporting roller 55 is the same as that of the upper surface of the movable table 43, so that the inclination of the wood plate is prevented, and the influence on the processing of the table tennis bat is avoided. The fixed mobile unit 5 of cutting board still includes electronic jar 51 and L type installation piece 57, and the front side of movable table 43 is equipped with L type installation piece 57, and the upside of L type installation piece 57 is equipped with electronic jar 51, and electronic jar 51's input is connected with the output electricity of outside PLC controller, and the flexible end of electronic jar 51 passes L type installation piece 57 and cylinder installation piece 52 fixed connection. The L-shaped mounting block 57 plays a role in supporting and fixing the electric cylinder 51, and the electric cylinder 51 is convenient for controlling the lifting height of the roller mounting block 52.
Descending cutting unit 3: include step motor 31, spacing axle 32, lead screw 33, lead screw cooperation piece 34, movable block 35 and circular stopper 38, the preceding upside lower surface of L supporting shoe 2 is equipped with two spacing axles 32 respectively, spacing axle 32 downside tip is equipped with circular stopper 38, the upper end of L supporting shoe 2 is equipped with step motor 31, external power source's output is connected through outside PLC controller electricity to step motor 31's input, L supporting shoe 2 and step motor 31's output shaft fixed connection are passed to lead screw 33's upside tip, spacing axle 32's surface sliding connection has movable block 35, movable block 35 and circular stopper 38 swing joint, the upside of movable block 35 is equipped with the lead screw cooperation piece 34 that corresponds with lead screw 33, lead screw 33 and the threaded connection of lead screw cooperation piece 34. The descending cutting unit 3 further comprises an electric main shaft 36, a milling cutter 37 and a cutting groove 39, the electric main shaft 36 is arranged in the middle of the lower side of the moving block 35, the input end of the electric main shaft 36 is electrically connected with the output end of an external PLC (programmable logic controller), the output shaft of the electric main shaft 36 is fixedly connected with the milling cutter 37, and the cutting groove 39 is arranged on the upper side of the moving table 43. The electric spindle 36 provides power for the rotation of the milling cutter 37, the electric spindle 36 has the advantages of light weight, high rotation speed, high power, small inertia, low noise, quick response and the like, so that the milling cutter 37 can conveniently cut timber plates, the cutting groove 39 facilitates the milling cutter 37 to cut the timber plates, and the milling cutter 37 and the movable table 43 are prevented from colliding with each other.
The working principle of the cutting and forming equipment for processing the continuous table tennis bat provided by the utility model is as follows: descending the cutting unit 3 is convenient to approach to cutting timber plates, the limiting shaft 32 and the circular limiting block 38 support and limit the moving block 35, the first stepping motor 31, the lead screw 33 and the lead screw matching block 34 are convenient to control the lifting direction and the lifting height of the moving block 35, and the moving block 35 supports the electric spindle 36. The electric spindle 36 provides power for the rotation of the milling cutter 37, the electric spindle 36 has the advantages of light weight, high rotation speed, high power, small inertia, low noise, quick response and the like, so that the milling cutter 37 can conveniently cut timber plates, the cutting groove 39 facilitates the milling cutter 37 to cut the timber plates, and the milling cutter 37 and the movable table 43 are prevented from colliding with each other. The front-back moving unit 4 facilitates feeding and cutting movement of the wood plate, the front-back moving unit 4 can guarantee cutting precision of the wood plate and forming effect of the racket, the moving groove 41 and the fixed sliding rod 42 limit the moving range and moving track of the moving table 43, the stepping motor II 44 and the screw 45 facilitate control of the feeding direction and feeding distance of the moving table 43, and the moving table 43 facilitates installation of the cutting plate fixing moving unit 5 and the wood plate. The fixed mobile unit 5 of cutting board makes things convenient for the cutting of timber panel to remove, the fixed mobile unit 5 of cutting board conveniently cuts timber panel again, it is fixed to the repeated aversion of panel, the machining efficiency that can improve table tennis bat and the utilization ratio of timber panel, mounting groove 56 facilitates the installation support cylinder 55, cylinder installation piece 52 plays the supporting role to three 53 of step motor and driving roller 54, three 53 of step motor facilitate the drive driving roller 54 to rotate, driving roller 54 and supporting roller 55 are convenient for remove timber panel. The L-shaped mounting block 57 plays a role in supporting and fixing the electric cylinder 51, and the electric cylinder 51 is convenient for controlling the lifting height of the roller mounting block 52. The height of the side end of the supporting roller 55 is the same as that of the upper surface of the movable table 43, so that the inclination of the wood plate is prevented, and the influence on the processing of the table tennis bat is avoided.
It is to be noted that, in the embodiment, the first stepping motor 31 adopts an SH-20402N model, the electric spindle 36 adopts an electric spindle in the patent application No. 201980003612.7, the second stepping motor 44 adopts an SH-20504D model, the electric cylinder 51 adopts an SDG32 model, the third stepping motor 53 adopts an FY42EM150A model, the external PLC controller adopts an MCS-51 model, and the external PLC controller controls the first stepping motor 31, the second stepping motor 36, the second stepping motor 44, the electric cylinder 51 and the third stepping motor 53 to operate by a method commonly used in the prior art.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (6)
1. The utility model provides a continuity cutting former for table tennis bat processing which characterized in that: comprising a support base (1);
support base (1): an L-shaped supporting block (2) is arranged on the rear side, a descending cutting unit (3) is arranged on the front upper side of the L-shaped supporting block (2), a front-and-back moving unit (4) is arranged on the upper side of the supporting base (1), and two cutting plate fixing and moving units (5) are respectively arranged on the left side and the right side of the front end of a movable table (43) in the front-and-back moving unit (4);
descending cutting unit (3): the device comprises a first stepping motor (31), a limiting shaft (32), a lead screw (33), a lead screw matching block (34), a moving block (35) and a circular limiting block (38), wherein the lower surface of the front upper side of an L supporting block (2) is respectively provided with two limiting shafts (32), the end part of the lower side of each limiting shaft (32) is provided with the circular limiting block (38), the upper end of the L supporting block (2) is provided with the first stepping motor (31), the input end of the first stepping motor (31) is electrically connected with the output end of an external power supply through an external PLC (programmable logic controller), the end part of the upper side of the lead screw (33) penetrates through the L supporting block (2) and is fixedly connected with the output shaft of the first stepping motor (31), the outer surface of each limiting shaft (32) is slidably connected with the moving block (35), the moving block (35) is movably clamped with the circular limiting block (38), the lead screw matching block (34) corresponding to the lead screw (33) is arranged on the upper side of the moving block (35), the screw rod (33) is in threaded connection with the screw rod matching block (34).
2. The cutting and forming device for continuous table tennis bat processing according to claim 1, wherein: the descending cutting unit (3) further comprises an electric spindle (36), a milling cutter (37) and a cutting groove (39), the electric spindle (36) is arranged in the middle of the lower side of the moving block (35), the input end of the electric spindle (36) is electrically connected with the output end of an external PLC (programmable logic controller), the output shaft of the electric spindle (36) is fixedly connected with the milling cutter (37), and the cutting groove (39) is arranged on the upper side of the movable table (43).
3. The cutting and forming device for continuous table tennis bat processing according to claim 1, wherein: the front-back moving unit (4) comprises a movable groove (41), a fixed sliding rod (42), a movable table (43), a second stepping motor (44) and a screw rod (45), the second stepping motor (44) is arranged on the front side of the supporting base (1), the input end of the second stepping motor (44) is electrically connected with the output end of an external PLC (programmable logic controller), three movable grooves (41) are respectively arranged on the upper side of the supporting base (1), the three movable grooves (41) are sequentially divided into a first movable groove, a second movable groove and a third movable groove from left to right, the fixed sliding rods (42) are respectively arranged inside the first movable groove and the third movable groove, the front side end of the screw rod (45) penetrates through the second movable groove to be fixedly connected with the output shaft of the second stepping motor (44), the rear side end of the screw rod (45) is rotatably connected with a blind hole formed in the rear side of the inner part of the movable groove (41), and the movable table (43) is slidably connected with the outer surface of the fixed sliding rod (42), the outer surface of the screw rod (45) is in threaded connection with a screw hole formed in the lower side of the movable table (43).
4. The cutting and forming device for continuous table tennis bat processing according to claim 1, wherein: cutting board fixed movement unit (5) include cylinder installation piece (52), three (53) of step motor, driving roll (54), support cylinder (55) and mounting groove (56), the rear side of cylinder installation piece (52) is equipped with three (53) of step motor, the input of three (53) of step motor is connected with the output electricity of outside PLC controller, driving roll (54) rear side transmission shaft passes the output shaft fixed connection of cylinder installation piece (52) and three (53) of step motor, driving roll (54) front side transmission shaft rotates with two blind holes of seting up of cylinder installation piece (52) inside rear side and is connected, mounting groove (56) have been seted up to the upside of activity platform (43), two support cylinder (55) are established to the inside of mounting groove (56).
5. The continuous cutting and forming device for table tennis bat processing according to claim 4, wherein: the fixed mobile unit (5) of cutting board still includes electronic jar (51) and L type installation piece (57), the front side of activity platform (43) is equipped with L type installation piece (57), the upside of L type installation piece (57) is equipped with electronic jar (51), the input of electronic jar (51) is connected with the output electricity of outside PLC controller, the flexible end of electronic jar (51) passes L type installation piece (57) and cylinder installation piece (52) fixed connection.
6. The continuous cutting and forming device for table tennis bat processing according to claim 4, wherein: the height of the side end of the supporting roller (55) is the same as that of the upper surface of the movable table (43).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121768121.2U CN215702431U (en) | 2021-07-31 | 2021-07-31 | Cutting former is used in processing of continuity table tennis bat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121768121.2U CN215702431U (en) | 2021-07-31 | 2021-07-31 | Cutting former is used in processing of continuity table tennis bat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215702431U true CN215702431U (en) | 2022-02-01 |
Family
ID=79991319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121768121.2U Expired - Fee Related CN215702431U (en) | 2021-07-31 | 2021-07-31 | Cutting former is used in processing of continuity table tennis bat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215702431U (en) |
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2021
- 2021-07-31 CN CN202121768121.2U patent/CN215702431U/en not_active Expired - Fee Related
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