GB2450423A - Press-cutting apparatus - Google Patents
Press-cutting apparatus Download PDFInfo
- Publication number
- GB2450423A GB2450423A GB0811396A GB0811396A GB2450423A GB 2450423 A GB2450423 A GB 2450423A GB 0811396 A GB0811396 A GB 0811396A GB 0811396 A GB0811396 A GB 0811396A GB 2450423 A GB2450423 A GB 2450423A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cutting
- rod
- amputated
- pressure chamber
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000005520 cutting process Methods 0.000 title claims abstract description 168
- 239000000463 material Substances 0.000 claims abstract description 95
- 238000000034 method Methods 0.000 description 8
- 239000004033 plastic Substances 0.000 description 7
- 238000002474 experimental method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 238000005336 cracking Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 241000592503 Speea Species 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D5/08—Means for actuating the cutting member to effect the cut
- B26D5/12—Fluid-pressure means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/38—Cutting-out; Stamping-out
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Nonmetal Cutting Devices (AREA)
- Shearing Machines (AREA)
Abstract
A press-cutting apparatus comprises a cutting blade 1 mounted on a cylinder rod 21 of an air cylinder 2. When the blade is pressed against a material A to be cut, a timer is set such that an air pressure in a rod-side pressure chamber 23 of the air cylinder and an air pressure in a head-side pressure chamber 22 are switched when a predetermined time has elapsed after the cutting blade abuts against the material. The cutting blade is moved in a press-cutting direction while applying an appropriate air pressure also to the rod-side pressure chamber, in order to cut the material. The timer may be actuated when the pressure in the rod-side pressure chamber of the air cylinder is changed. The air pressures in the rod-side pressure chamber and the head-side pressure chamber may be switched when the cutting blade moves by a predetermined amount. A pressure detector 7 connected to the rod-side pressure chamber may actuate a timer in a control device 8, which may switch the air flow via auxiliary valves 6a, 6b.
Description
SPECIFICATION
TITLE OF THE INVENTION
Press-cutting apparatus
TECHNICAL FIELD
(0001] The present invention relates to a press-cutting apparatus in which a cutting blade is pressed against an amputated material, thereby cutting the amputated material, and more particularly, to a press-cutting apparatus which is used for cutting and removing a redundant portion generated around a product portion of a plastic formed by a mold, and in which a cutting blade is pressed against a boundary between the product portion and the redundant portion to press, cut * and remove the redundant portion.
RELATED ART **.*
2] Conventionally, when a redundant portion of a plastic * is to be cut and removed, a press machine is generally used.
When a cutting and removing operation along a three-dimensional complicated shape are carried out, in many cases, there is used a press-cutting apparatus in which one or more cylinders each provided at its tip end with a cutting blade are disposed at a predetermined angle in accordance with a shape of the plastic, the cutting blade is pressed against a boundary between the product portion and the redundant portion to cut the same.
3] As a cylinder used as a power unit for the press-cutting apparatus of this kind, an air cylinder is exclusively used.
This is because that if a hydraulic cylinder is used, there is a problem that hydraulic oil may leak and damage the amputated material, and even if slight air leaks outside, there is no problem in terms of environment, but if hydraulic oil leaks, environment is contaminated and there is a problem in terms of equipment and maintenance.
4] If a cutting blade mounted on a rod tip end of an air cylinder presses and cuts the amputated material, the cutting blade impulsively enters in the press-cutting direction at the instant when the amputated material is pressed and cut. That is, when the cutting blade presses and cuts the amputated * ** material, in the course where a cutting edge of the cutting **** blade abuts against, presses and cut the amputated material (process (A) to (C) in Fig. 3), as shown in a graph in Fig. 2, a gradually increasing resistance is generated in the *. : cutting blade 1 and a rod of the air cylinder. However, when * ** *:*. a remaining thickness,t of an amputated material A becomes extremelythin (see (B) inFig. 3), aremainingmaterialportion ruptures in a catastrophe manner and thus, a resistance of the cutting blade in the press-cutting direction is abruptly reduced, and the cutting blade impulsively enters in the press-cutting direction.
5] This is because that an air circuit as shown in Fig. 4 is generally connected to the air cylinder provided at its tip end with the cutting blade, and the press cut speed of the cutting blade 1 is controlled only by an air pressure caused by a regulator 3 and by an air flow rate set by speed controllers 5a and Sb connected to a head-side pressure chamber 22 and a rod-side pressure chamber 23.
(0006] That is, in the case of hydraulic pressure, since a compression ratio is so small that it can be ignored, the cutting blade can be stably controlled only by controlling the flow rate. However, if the air cylinder is used, even if a resistance to the cutting blade 1 in the press-cutting direction is slightly varied, air existing between the air cylinder 2 and the speed controllers 5a and Sb is compressed, * ** and an entering speed v of the cutting blade 1 with respect to an entering amount of the cutting blade 1 is extremely varied as shown in the graph in Fig. 2 at the instant when the amputated material is pressed and cut. S. S * S* * **
If such a state is repeated whenever the cutting operation is carried out, a fatigue is accumulated in the cutting blade and a receiving portion of a cutting receiving stage and endurance is deteriorated. In addition, when an amputated material is made of brittle material, a crack is generated in an amputated material (product) and excellent cut surface can not be obtained. If a constant or higher a cutting force is not applied, the cutting blade can not enter up to a position (B) in Fig. 3, and it becomes impossible to cut.
(0008] Patent documents 1 to 3 describe conventional technique documents for controlling speed of an air cylinder. In any of the patent documents 1 to 3, motion stability in the entire stroke is realized by performing the control while detecting variation in back pressure and thus, when a cutting blade is mounted on the air cylinder to press and cut an amputated material, since the motion (cutting operation) has already been completed when the cutting blade presses and cuts the amputated material and the back pressure is generated, it is not possible to prevent the cutting blade from impulsively entering in the press-cutting direction at the instant when * ** the amputated material is pressed and cut.
** [0009) [Patent Document].] Japanese Patent Application Laid-open No.Hei 03-204402 [Patent Document 2] Japanese Utility Model Application Laid-open No.Sho 58-028102 [Patent Document 3] Japanese Utility Model Application Laid-open No.Sho 61-000503 [00101 On trial, when the cutting blade halfway entered the amputated material, the pressure in the head-side pressure chamber was reduced, if the air pressure on the side of the cylinder rod was equal to the atmospheric pressure, since the volume could easily be compressed, air pressure as accumulated up to a position immediately before the press cutting and as a result, the cutting blade entered impulsively in the press-cutting direction. To suppress this, if the pressure in the head-side pressure chamber was reduced, the cutting behavior of the amputated material became unstable, it became difficult to adjust the pressure in the head-side pressure chamber and this was a practical problem.
DISCLOSURE OF THE INVENTION
PROBLEM TO BE SOLVED BY THE INVENTION
1] The present invention has been accomplished in view of such circumstances, and the invention provides a press-cutting * .* :::::: apparatus in which when a cutting blade mounted on a cylinder rod of an air cylinder presses and cuts an amputated material, an entering speed of the cutting blade with respect to the amputated material is appropriately controlled so that the cutting blade is prevented from impulsively entering in the press-cutting direction at the instant when the amputated material is pressed and cut, it is possible to protect the cutting blade or a receiving portion of the cutting/receiving stage, and even when the amputated material is made of brittle material, it is possible to press and cut the amputated material (product) without damaging (cracking) the amputated material.
[Means for Solving the Problem] [0012] To achieve the above object, the invention provides a press-cutting apparatus in which a cutting blade mounted on a cylinder rod of an air cylinder is pressed against an amputated material, thereby cutting the amputated material, wherein a timer is set such that an air pressure in a rod-side pressure chamber of the air cylinder and an air pressure in a head-side pressure chamber are switched when predetermined time elapsed after the cutting blade abuts against the amputated material, the cutting blade is moved in a press-cutting direction while applying an appropriate air pressure also to the rod-side pressure chamber, thereby press-cutting the amputated material.
[0013) * At that time, it is preferable that the timer is set such that the air pressure in the rod-side pressure chamber of the **** air cylinder and the air pressure in the head-side pressure chamber are switched immediately before the cutting blade presses and cuts the amputated material.
It is preferable that timing at which the timer is actuated is when the pressure in the rod-side pressure chamber of the air cylinder is changed, or timing at which the timer is actuated is when a flow rate of air supplied into the head-side pressure chamber of the air cylinder reaches a predetermined flow rate, or when a flow rate of air which flows out from the rod-side pressure chamber of the air cylinder reaches a predetermined flow rate or higher, or when a flow rate of air flowing out from the rod-side pressure chamber of the air cylinder becomes equal to or less than a predetermined flow rate.
Further, an air pressure in a rod-side pressure chamber of the air cylinder and an air pressure in a head-side pressure chamber are switched when the cutting blade abuts against the amputated material and a moving amount in a press-cutting direction reaches a predetermined amount, the cutting blade is moved in the press-cutting direction while applying an appropriate air pressure also to the rod-side pressure chamber, thereby press-cutting the amputated material. With this, the timer is unnecessary.
EFFECT OF THE INVENTION
(0014] The press-cutting apparatus of the present invention has * I. the above-described structure. Therefore, it is possible to a...
easily and appropriately control the entering speed of the cutting blade after the cutting blade abuts against the amputated material and enters (bites). Thus, it is possible to cut the amputated material within a short time without * _* increasing time between the instant when the cutting operation is started and the instant when the cutting operation is completed so much. It is possible to prevent the cutting blade from impulsively entering the press-cutting direction at the instant when the amputated material is pressed and cut, and it is possible to protect the cutting blade and the receiving portion of the cutting/receiving stage.
5] Further, even if the amputated material is made of brittle material1 since it is possible to appropriately control the entering speed (biting speed) with respect to the amputated material, the cutting blade can press and cut the amputated material (product) without damaging (cracking) the amputated material.
BRIEF DESCRIPTION OF THE DRAWINGS
(0016] Fig. 1 is a schematic circuit diagram for explaining one example of an embodiment of the present invention; Fig. 2 is a diagram for explaining a relation between an entering amount of a cutting blade and an entering speed when an amputated material is cut using an air cylinder in which * ** a general air cylinder is incorporated; Fig. 3 A are schematic sectional views for explaining a state where the cutting blade presses and cuts the amputated material, wherein this drawing shows a state where the cutting *. blade abuts against the amputated material and starts * _J *:*. entering; Fig. 3 B are schematic sectional views for explaining a state where the cutting blade presses and cuts the amputated material, wherein this drawing shows a state immediately before the cutting blade presses and cuts the amputated material; Fig. 3 C are schematic sectional views for explaining a state where the cutting blade presses and cuts the amputated material, wherein this drawing shows a state where the cutting blade pressed and cut the amputated material; and Fig. 4 is a circuit diagram for explaining a conventional
example.
BEST MODE FOR CARRYING OUT THE INVENTION
[00171 A concrete preferable embodiment of the present invention will be explained below in detail with reference to the drawings. However, the invention is not limited to the illustrated embodiment. The same constituent members are designated with the same symbols through the drawings.
[0018) In the drawings, a symbol 1 represents a cutting blade * S. *5 a * which presses and cuts an amputated material (e.g., plastic 1. SS S's. product) A. In the illustrated example, only one cutting blade
S
is shown. However, in the actual case, the number of cutting blades correspond to the number of portions of the amputated . : material to be cut and the number changes in accordance with * a, the shape of the amputated material A. The cutting blade 1 is mounted on a tip end of a cylinder rod 21 of an air cylinder 2, and the cutting blade 1 presses and cuts the amputated material A which is fixed onto a cutting/receiving stage B by forward and backward motion of the cylinder rod 21.
[00191 Especially when the amputated material A is plastic product, the cutting blade 1 is heated by a heater in accordance with necessity for assisting the cutting operation. The temperature setting and the shape of a cutting edge of the cutting blade are determined by properties of the amputated material A. Especially when the amputated material A is plastic product, examples of such plastic are thermosetting resin or thermoplastic resin such as PP, PE, ASG, ABS and PS.
0] A recess groove B? is formed in the receiving portion of the cutting/receiving stage B along the shape of the cutting edge of the cutting blade 1 such that the cutting blade 1 penetrates the amputated material A. A resin or soft metal plate B2 is embedded in the recess groove B? to enhance the cutting properties by the cutting blade? in some cases. With this, the amputated material A is supported and fixed from below, the cutting edge of the cutting blade 1 slightly bites so that the cutting blade 1 can cut the amputated material A more *.
: reliably.
(0021] When such a structure is employed, the cutting blade 1 *..: is prevented from impulsively entering in the press-cutting direction at the instant when the amputated material A is pressed and cut, endurance of the cutting edge of the cutting blade 1 and the receiving portion of the cutting/receiving stage B, especially the resin or soft metal plate B2 embedded in the recess groove B? are largely enhanced, and the initial cutting properties can be maintained for a long term.
2] Further, a product retaining member C is provided on the cutting/receiving stage B to prevent the amputated material A on the side of the product from being deformed when the amputated material A is to be pressed and cut.
3] An air circuit which controls the forward/backward motion of the cylinder rod 21, i.e., the pressing/cutting motion of the cutting blade 1 is connected Co the air cylinder 2 which allows the cutting blade 1 to press and cut.
As shown in Fig. 1 in detail, the air cylinder is connected to the main regulator 3, a solenoid valve 4, and speed controllers 5a and 5b which are respectively connected to a head-side pressure chamber 22 and a rod-side pressure chamber 23, like the conventional circuit. The air cylinder further includes a head-side auxiliary valve 6a and a rod-side :. auxiliary valve 6b which are respectively connected to the * speed controllers 5a and 5b, a pressure detector 7 and a control *** device 8.
*:*. (00241 *:*. The head-side auxiliary valve 6a is interposed between the solenoid valve 4 and the speed controller 5a, and controls the pressure in the head-side pressure chamber 22. Similarly, the rod-side auxiliary valve Gb is interposed between the solenoid valve 4 and the speed controller 5b, and controls the pressure in the rod-side pressure chamber 23.
5] These head-side auxiliary valve 6a and rod-side auxiliary valve 6b accurately grasp the timing (see the graph in Fig. 2 and (B) in Fig. 3) at which a remaining thickness Lt of the amputated material A becomes extremely thin in the process (from (A) to (C) in Fig. 3) in which the cutting edge of the cutting blade 1 abuts against the amputated material A and presses and cuts the amputated material A, the head-side auxiliary valve 6a and rod-side auxiliary valve 6b apply appropriately adjusted air pressure to both the head-side pressure chamber 22 and rod-side pressure chamber 23 of the air cylinder 2, thereby suppressing the elasticity of air, and realizing smooth pressing/cutting motion of the cutting blade 1.
6] When the set predetermined time is elapsed after the cutting blade 1 abuts against the amputated material A, the head-side auxiliary valve 6a and the rod-side auxiliary valve 6b switch the air pressure in the head-side pressure chamber 0** * 22 of the air cylinder 2 and the air pressure in the rod-side ** pressure chamber 23, thereby moving the cutting blade 1 in the press-cutting direction.
(0027] Various detecting methods of timing at which the air pressure in the head-side pressure chamber 22 and the air pressure in the rod-side pressure chamber 23 of the air cylinder 2 are switched can be conceived. According to a first method, a difference between an air pressure when the pressure in the rod-side pressure chamber 23 of the air cylinder 2 is changed, i.e., an air pressure of the rod-side pressure chamber 23 required until the cutting blade 1 abuts against the amputated material A and an air pressure in the rod-side pressure chamber 23 when the cutting blade 1 abuts against the amputated material A is detected by the pressure detector 7, and the timer is actuated.
8] According to a second method, the pressure detector 7 detects time when a flow rate of air supplied into the head-side pressure chamber of the air cylinder reaches a predetermined flow rate or higher, time when a flow rate of air which flows out from the rod-side pressure chamber and reaches a predetermined amount or higher, or time when a flow rate of air which flows out from the rod-side pressure chamber becomes :.:: equal to or lower than a predetermined flow rate, the pressure detector 7 actuates the timer. That is, a flow rate sensor detects variation in the flow rate of air supplied into the *..
* head-side pressure chamber until the cutting blade 1 abuts against the amputated material A and variation in the flow rate of air supplied to the head-side pressure chamber immediately after the cutting blade 1 abuts against the amputated material A, or the flow rate sensor detects variation in the flow rate of air discharged from the rod-side pressure chamber 23 until the cutting blade 1 abuts against the amputated material A and variation in the flow rate of air discharged from the rod-side pressure chamber 23 immediately after the cutting blade 1 abuts against the amputated material A, or the flow rate sensor detects that the flow rate of air flowing out from the rod-side pressure chamber immediately after the cutting blade 1 abuts against the amputated material A becomes equal to or less than a predetermined value, thereby actuating the timer.
9] According to a third method, an encoder detects time when a moving amount of the cutting blade in the press-cutting direction reaches a predetermined amount, i.e., the encoder detects time when the cutting blade 1 bites into the amputated material A and detects a moving amount of the cutting blade 1 required until the remaining thickness At becomes extremely thin.
0] In any of the methods, economy and reliability are both taken into account in the actual use. If the timing at which * * :. the air pressure in the head-side pressure chamber 22 and the * : air pressure in the rod-side pressure chamber 23 of the air S..
* cylinder 2 should be switched is detected, the control device 8 is actuated, and the air pressure in the head-side pressure chamber 22 and the air pressure in the rod-side pressure chamber 23 of the air cylinder 2 are adjusted for predetermined time.
[0031) Next, the operation of the press-cutting apparatus according to the present invention will be explained. In the following explanation, as timing at which the adjustment of the air pressure in the head-side pressure chamber 22 and the air pressure in the rod-side pressure chamber 23 of the air cylinder 2 is started, the timer is actuated when the pressure in the rod-side pressure chamber 23 is changed, and the timer is stopped if predetermined time is elapsed.
2] In the initial state, air whose pressure is initially adjusted by the main regulator 3 reaches the solenoid valve 4, and in a state where even if an air cylinder output signal (cut-starting signal) is issued from the solenoid valve 4, the signal is not sent to the head-side auxiliary valve 6a or the rod-side auxiliary valve 6b, it is directly connected to the air cylinder 2.
3] If a signal is input to the main regulator 3 and the air cylinder 2 start the cutting operation, since the head-side auxiliary valve 6a and the rod-side auxiliary valve 6b are not S...
:. switched at this time point, the air circuit shows the same * effect as that in Fig. 1, and the motion also proceeds in the 5. *
same way. ** S * . . * **
Until the cutting blade 1 abuts against the amputated material A, the air exhaust amount of the rod-side pressure chamber 23 is high, and the air pressure in the rod-side pipe shows slight rise due to the resistance in the pipe. Next, the cutting blade 1 abuts against the amputated material A (state of (A) in Fig. 3), and if the moving speed in the press-cutting direction is reduced as shown in the graph in Fig. 2, the air exhaust amount of the rod-side pressure chamber 23 is also reduced and the air pressure in the rod-side pipe also becomes equal to the atmospheric pressure (state of (B) in Fig. 3).
5] The pressure detector 7 connected to the rod-side pipe detects the air pressure change in the rod-side pressure chamber 23, and a detection signal actuates the timer of the control device 8.
At that time, the setting of the timer of the control device 8 is determined based on data which is previously obtained by an experiment for each of amputated materials A such that time of air supply is up at the instant when the remaining thickness t of the amputated material A becomes extremelythin (astatof (B) inFig. 3) intheprocessinwhich the cutting edge of the cutting blade 1 abuts against the I...
amputated material A (process from (A) to (C) in Fig. 3).
* [0036] That is, for each of amputated materials A, an experiment is conducted to obtain data as to how many seconds it takes until the remaining thickness t of an amputated material A becomes extremely thin after a difference between an air pressure in the rod-side pressure chamber 23 until the cutting blade 1 abuts against the amputated material A and an air pressure in the rod-side pressure chamber 23 when the cutting blade 1 abuts against the amputated material A becomes equal to a predetermined pressure, and the timer of the control device 8 is set such that the time of the timer of the control device 8 is up at the instant when the remaining thickness At of the amputated material A becomes extremely thin, and the air supply is changed over between the head-side auxiliary valve 6a and the rod-side auxiliary valve Gb.
(0037) The control device 8 sends a signal to the head-side auxiliary valve 6a and the rod-side auxiliary valve 6b, switches the circuits, and supplies appropriately adjusted air pressure to the head-side pressure chamber 22 and the rod-side pressure chamber 23 of the air cylinder 2. This air pressure is adjusted such that the cylinder rod 21 of the air cylinder 2 moves in the press-cutting direction, but this pressure adjustment is also previously determined by an experiment for each of amputated materials A. [0038] S...
It is preferable that the speed controllers 5a and Sb * are also adjusted by experiments for each of amputated materials A such that a flow rate is appropriately reduced.
With this, if the pressure and the flow rate are appropriately adjusted, the cutting blade 1 moves smoothly in the press-cutting direction even if the remaining thickness At of the amputated material A becomes extremely thin, an impact is not generated.
(0039] In a general one-side rod air cylinder, a pressure receiving surface of the rod-side pressure chamber 23 is smaller than that of the head-side pressure chamber 22 by a cross section area of the cylinder rod 21. Therefore, even if the same air pressures are applied to both the head-side pressure chamber 22 and rod-side pressure chamber 23, the rod moves in the press-cutting direction. If this fact is utilized, sub-regulators 9a and 9b in the illustrated embodiment can be omitted. Similarly, although accuracy is somewhat deteriorated, one of the solenoid valve 4 and the head-side auxiliary valve 6a can be omitted.
0] Having described specific preferred embodiments of the invention with reference to the accompanying drawings, it will be appreciated that the present invention is not limited to those precise embodiments, and that various changes and modifications can be effected therein by one of ordinary skill in the art without departing from the scope of the invention **** as defined by the appended claims. * . * **. * ** a * a * * a. a. * S * * **
[Description of the reference numerals)
A: amputated material B: cutting/receiving stage C: product retaining member 1: cutting blade 2: air cylinder 21: cylinder rod 22: head-side pressure chamber 23: rod-side pressure chamber 3: main regulator 4: solenoid valve 5a: speea controller 5b: speed controller 6a: head-side auxiliary valve * ** 6b: rod-side auxiliary valve * . *..
7: pressure detector 4* * * 8: control device 9a: sub-regulator 9b: sub-regulator *. S * S S S **
Claims (4)
1. A press-cutting apparatus in which a cutting blade mounted on a cylinder rod of an air cylinder is pressed against an amputated material, thereby cutting the amputated material, wherein a timer is set such that an air pressure in a rod-side pressure chamber of the air cylinder and an air pressure in a head-side pressure chamber are switched when predetermined time elapsed after the cutting blade abuts against the amputated material, the cutting blade is moved in a press-cutting direction while applying an appropriate air pressure also to the rod-side pressure chamber, thereby press-cutting the amputated material. * ** * * *
2. The press-cutting apparatus according to claim 1, :. wherein timing at which the timer is actuated is when the * pressure in the rod-side pressure chamber of the air cylinder * is changed. ** * * * * * **
3. The press-cutting apparatus according to claim 1, timing at which the timer is actuated is when a flow rate of air supplied into the head-side pressure chamber of the air cylinder reaches a predetermined flow rate, or when a flow rate of air which flows out from the rod-side pressure chamber of the air cylinder reaches a predetermined flow rate or higher, or when a flow rate of air flowing out from the rod-side pressure chamber of the air cylinder becomes equal to or less than a predetermined flow rate.
4. A press-cutting apparatus in which a cutting blade mounted on a cylinder rod of an air cylinder is pressed against an amputated material, thereby cutting the amputated material, wherein an air pressure in a rod-side pressure chamber of the air cylinder and an air pressure in a head-side pressure chamber are switched when the cutting blade abuts against the amputated material and a moving amount in a press-cutting direction reaches a predetermined amount, the cutting blade is moved in the press-cutting direction while applying an appropriate air pressure also to the rod-side pressure chamber, thereby press-cutting the amputated material. S.' * . **0* S. * S * S.. * *
S * S S * S.
S S * S * S.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007165409A JP2009000788A (en) | 2007-06-22 | 2007-06-22 | Press-cutting apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB0811396D0 GB0811396D0 (en) | 2008-07-30 |
| GB2450423A true GB2450423A (en) | 2008-12-24 |
Family
ID=39682928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0811396A Withdrawn GB2450423A (en) | 2007-06-22 | 2008-06-20 | Press-cutting apparatus |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2009000788A (en) |
| GB (1) | GB2450423A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102806580A (en) * | 2012-08-30 | 2012-12-05 | 镇江市宏业科技有限公司 | Broken foil shear control system of aluminium-foil mill |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107738286A (en) * | 2017-11-23 | 2018-02-27 | 福建泰盛实业有限公司 | A kind of structure of voltage regulation of pneumatic paper cutter |
| CN108372523A (en) * | 2018-02-06 | 2018-08-07 | 重庆丰胜天家具有限公司 | The trimming device of furniture filler |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03204402A (en) * | 1989-12-28 | 1991-09-06 | Shimomura Seisakusho:Kk | Speed control of air cylinder |
| JPH09280207A (en) * | 1996-04-17 | 1997-10-28 | Sekisui Chem Co Ltd | Impact absorber of pneumatic cylinder driven body |
| JPH10131902A (en) * | 1996-11-01 | 1998-05-22 | Smc Corp | Cylinder positioning control device |
-
2007
- 2007-06-22 JP JP2007165409A patent/JP2009000788A/en active Pending
-
2008
- 2008-06-20 GB GB0811396A patent/GB2450423A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03204402A (en) * | 1989-12-28 | 1991-09-06 | Shimomura Seisakusho:Kk | Speed control of air cylinder |
| JPH09280207A (en) * | 1996-04-17 | 1997-10-28 | Sekisui Chem Co Ltd | Impact absorber of pneumatic cylinder driven body |
| JPH10131902A (en) * | 1996-11-01 | 1998-05-22 | Smc Corp | Cylinder positioning control device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102806580A (en) * | 2012-08-30 | 2012-12-05 | 镇江市宏业科技有限公司 | Broken foil shear control system of aluminium-foil mill |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2009000788A (en) | 2009-01-08 |
| GB0811396D0 (en) | 2008-07-30 |
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