CA1328988C - Device for reshaping the contour surface of the plastic injection hole of a metal mold - Google Patents
Device for reshaping the contour surface of the plastic injection hole of a metal moldInfo
- Publication number
- CA1328988C CA1328988C CA000597011A CA597011A CA1328988C CA 1328988 C CA1328988 C CA 1328988C CA 000597011 A CA000597011 A CA 000597011A CA 597011 A CA597011 A CA 597011A CA 1328988 C CA1328988 C CA 1328988C
- Authority
- CA
- Canada
- Prior art keywords
- magnetic block
- housing
- injection hole
- magnetic
- metal mold
- 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.)
- Expired - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/1781—Aligning injection nozzles with the mould sprue bush
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
Abstract of the Disclosure Disclosed is a device for reshaping the contour surface of the plastic injection hole of a metal mold.
It essentially comprises a magnetic block and a cutter tool. The magnetic block is capable of switching from magnetizing to demagnetizing position and vice versa.
The magnetic block can be attached to the metal mold when it is switched to magnetizing position. The magnetic block is put in demagnetizing positiion, and the magnetic block is moved on the metal mold until it is put in alignment with the center of the plastic injection hole of the metal mold. The cutter tool is attached to the magnetic block by switching to magnetizing position, and then the cutter tool is automatically put in alignment with the center of the injection hole. The worn injection hole can be reshaped to its original shape simply by rotating the cutter tool by hand. Thus, necessary reshaping work can be performed in situ without removing a heavy mold and setting it in a lathe.
It essentially comprises a magnetic block and a cutter tool. The magnetic block is capable of switching from magnetizing to demagnetizing position and vice versa.
The magnetic block can be attached to the metal mold when it is switched to magnetizing position. The magnetic block is put in demagnetizing positiion, and the magnetic block is moved on the metal mold until it is put in alignment with the center of the plastic injection hole of the metal mold. The cutter tool is attached to the magnetic block by switching to magnetizing position, and then the cutter tool is automatically put in alignment with the center of the injection hole. The worn injection hole can be reshaped to its original shape simply by rotating the cutter tool by hand. Thus, necessary reshaping work can be performed in situ without removing a heavy mold and setting it in a lathe.
Description
DEVICE FOR RESHAPING THE CONTOUR SURFACE OF
THE PLASTIC INJECTION HOLE OF A METAL MOLD
Background of the Invention Field of the Invention The present invention relates to a device for reshaping the contour surface of the plastic injection hole of a metal mold, which metal mold is used in a plastic injection molding apparatus.
Description of Prior Art Every time plastic material is injected into a plastic injection metal mold, the injection nozzle is pushed against the injection hole of the metal mold, and accordingly the contour surface of the ~ injection hole of the metal mold wears. Then, a gap ¦~ 15 appears between the metal mold and the nozzle tip, thus allowing plastic to leak through the gap space.
¦~ The resulting burr of the plastic mold product is caught by the metal mold around its injection hole, thus making it inconvenient to remove the plastic mold product from the metal mold. Therefore, it is necessary to machine the contour surface of the injection entrance to its original shape, so that ` the gap between the metal mold and the nozzle tip may be reduced when the nozzle tip is applied to the injection hole of the metal mold.
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, -2- 132~988 The reshaping work, however, requires removal of a heavy metal mold from a molding apparatus and subsequent attachment of the metal mold to a lathe. This is a tedious and time consuming work. Also, disadvantageously 5 the molding work is interrupted for a relatively long time, and accordingly the efficiency with which molding is effected, lowers.
Summary of the Invention With the above in mind one object of the present 10 invention is to provide a device for reshaping the contour surface of the plastic injection hole of a metal mold which device permits necessary reshaping work in situ without removing the worn metal mold from a molding apparatus and attaching it to a lathe.
To attain this object a device for reshaping the contour sruface of the plastic injection hole of a metal mold according to the present invention comprises: a magnetic block comprising upper and lower intervenient barrier sections of non-magnetic material and opposite 20 concave pieces of magnetic material sandwiching the non-magnetic barrier sections to define a circular hole, and a permanent magnet cylinder rotatably fitted in the circular hole thus defined, thereby causing appearance of the magnetic field across the opposite ends of the 25 magnetic block when the permanent magnet cylinder is rotated to the position in which its poles N and S are on a line parallel to the bottom of the magnetic block, and causing disappearance of the magnetic field across the opposite ends of the magnetic block when the 30 permanent magnet cylinder is rotated to the position in which its poles N and S are on a line perpendicular to the bottom of the magnetic block; an arm one end of which is fixed to the magnetic block and the other end of which arm has a translational rod movable in ,` . ' .; .
. . .
alignment with the central axis of the contour surface of the plastic injection hole of the metal mold; and a cutter tool comprising a housing, a spring-biased trunk contained in and movably fixed to the housing and a 5 cutter blade which is operatively connected to the spring-bias`ed trunk so as to move back and forth under the influence of a spring.
The reshaping device may further comprise a jig which is adapted to be detachably fixed to the magnetic 10 block. The jig has a pointing rod in alignment with the translational rod on the free end of the arm.
According to a preferred embodiment the cutter blade is fixed to the front end of the trunk; the rear colsed end of the housing has a reentrancy to accomodate 15 the tip of the translational rod, and the spring is put in the space between the rear closed end of the housing and the rear end of the trunk.
According to another preferred embodiment the cutter blade is fixed to the front end of the housing, 20 and the trunk is fitted in and movably connented to the housing. The rear of the trunk has a reentrancy to accomodate the tip of the translational rod, and the spring is put in the space between the front end of the trunk and the bottom of the housing.
A retractable arm which is capable of adjusting its length, can be used in place of the arm having a translational rod at its free end.
In use the jig is attaced to the magnetic block, and the permanent magnet cylinder is rotated to the 30 demagnetizing position. The magnetic bolck is moved on the metal mold A until its pointing rod is put in alignment with the injection hole of the metal mold.
Then, the permanent magnet cylinder is rotated to the magnetizing position, thereby causing the magnetic block 35 to attach itself to the metal mold. The jig is removed from the magnetic block, and-then the translational rod is automatically put in alignment with the central axis i of the contour surface of the injection hole.
J. The translational rod is made to advance to sandwich the cutter tool between the contour surface of 5 the injection hole of the metal mold and the translational rod. Then, the cutter blade is rotated by holding and rotating the tool housing by hand until the contour surface of the injection hole is cut to its original shape.
The cutter tool is removed from the arm by ¦ withdrawing the translational rod, and then the the permanent magnet cylinder is rotated to the demagnetizing position, thereby permitting the removal of the magnetic block from the metal mold.
Other objects and advantages of the present invention will be understood from the following description of a preferred embodiment, which is shown in accompanying drawings:
Fig.1 is a side view of a reshaping device 20 according to an embodiment of the present invention in its reshaping position;
Fig.2 is a similar side view, but showing the reshaping device with its jig attaced in place of its ) cutting tool;
Fig.3 is a side view of another cutting tool, partly broken and shown in section;
Fig.4 is a perspectïve view of the reshaping device with its jig attaced in place of its cutting tool;
f 30 Fig.5 is a perspective view of the jig;
Fi9.6 is a cross section of a magnetic bolck in its demagnetizing position;
Fig.7 is a cross section of a magnetic block in its magnetizing position; and ' 35 Fig.8 shows a metal mold in section and an injection nozzle tip.
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-4a-Embodiments Fig. 8 shows a plastic injection mold A and the injection nozzle S of a plastic injection molding apparatus. Every time plastic material is injected into the mold, the nozzle S is pushed against the injection hole of the metal mold A, and accordingly the contour surface T of the injection hole of the metal mold wears. Then, a gap appears between the metal mold and the nozzle tip, thus allowing plastic to leak through the gap space. The resulting burr of the plastic mold product is caught by the metal mold around its injection hole, thus making it inconvenient to remove the plastic mold product from the metal mold. Therefore, it is necessary to machine the contour surface of the injection entrance to its original shape, so that the gap between the metal mold and the nozzle tip may be reduced when the nozzle tip is applied to the injection hole of the metal mold.
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Referring to Fig.4, 6 and 7, a magnetic block 3 is shown as comprising upper and lower intervenient barrier sections of non-magnetic material 1 and opposite concave 5 pieces of ma~netic material 2 sandwiching the non-magnetic barrier sections 1 to define a circular hole, and a permanent magnet cylinder 4 rotatably fitted in the circular hole thus defined. The permanent magnet cylinder 4 is chamfered on opposite sides as indicated 10 at 5, and it has N and S poles. As best shown in Fig.4 a rotary cap H is put on the top of the cylinder 4. The magnetic field will appear across the opposite ends 6 of the magnetic block 3 when the permanent magnet cylinder 4 is rotated by the rotary cap H to the magnetizing '(~ 15 position in which its poles N and S are on a horizontal line parallel to the bottom of the magnetic block 3 (See Fig.7). The magnetic field across the opposite ends 6 of the magnetic block 3 will disappear when the permanent magnet cylinder 4 is rotated to the demagnetization 20 position in which its poles N and S are on a vertical line perpendicular to the bottom of the magnetic block 3 (See Fig.6).
One end of an arm 7 is fixed to the magnetic block 3 and the other end of the arm 7 has a translational 25 screw rod 8 movable in alignment with the central axis s of the contour surface T of the plastic injection hole of a metal mold A.
As shown in Fig.1, a cutter tool comprises a housing 11, a spring-biased trunk 10 contained in and 30 movably fixed to the housing 11 and a cutter blade 9 fixed to the spring-biased trunk 10 so as to move back and forth under the influence of a spring 12.
Specifically the trunk 10 has a key slot 18 on its circumference, and the housing 11 has a key 17. The 35 trunk 10 is inserted in the housing 11 with the key 17 A
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,, extending in the key slot 18 of the trunk surface. The spring 12 is put in the space between the rear closed end of the housing 11 and the rear end of the trunk 10, thus applying a resilient push to the trunk 10 all the time.
Preferably the cutter blade 9 may have a centering ' projection 9a to assure that the cutter blade 9 is put ¦ in exact alignment with the center axis of the injection s hole 15 of the metal mold A. The rear end of the housing 10 11 has a seat metal 19. It has a reentrancy to accomodate the tip of the translational screw rod 8.
As shown in Fig.1, the worn contour surface T of therinjection hole can be reshaped to its original shape simply by rotating the cutter tool by hand, which tool 15 is resiriently pushed against the metal mold A all the time. In this position metal chips cannot enter the cavity C of the metal mold.
Fig.3 shows another cutter tool as comprising a houseing 11 having a cutter blade 9 fixed to its closed 20 front and a trunk 10 fitted in and movably fixed to the housing. Specifically the trunk 10 has a key slot 18 and the housing has a key 17. The trunk 10 is fitted in the hollow space of the housing 10 with the key 17 inserted in the key slot 18.
Fig.5 shows a jig 13 of a transparent synthetic resin, which jig can be detachably fixed to the magnetic block 3. The jig 13 has two opposite legs 13a and a ; pointing rod 16. The pointing rod 16 will be put in ' alignment with the translational screw rod 8 on the free j 30 end of the arm 7 when the jig 3 is attached to the magnetic block 2 with its legs 13a put on the opposite sides of the magnetic block 2.
Then, the magnetic cylinder 4 is rotated to put the magnetic block 3 in its demagnetizing position. The 35 magnetic block 3 is moved on the metal mold A until it reached the position in which the pointing rod 16 can be :,;
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After inserting the pointing rod 16 in the injection hole 15 of the metal mold A the magnetic cylinder 4 is rotated to put the magnetic block 3 in its 5 magnetizing position. Then, the magnetic block 3 is attached to the metal mold A, and the jig 3 along with its pointing rod 16 is removed from the magnetic block 3. The blade 9 of the cutter tool is pushed against the injection hole of the metal mold A, and the 10 translational screw rod 8 is made to advance and push the rear end of the cutter tool until the trunk 10 yieldingly withdraws in the housing 11. Thus, the cutter tool is resiliently supported between the metal mold A
and the translational screw rod 8, and then the cutter 15 tool is put in the exact alignment with the center of the injiction hole of the metal mold A. Reshaping can be effected simply by rotating the cutter tool by hand.
A retractable arm which is capable of adjusting its length, can be used in place of the arm 7 having a screw rod 8 at its free end.
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THE PLASTIC INJECTION HOLE OF A METAL MOLD
Background of the Invention Field of the Invention The present invention relates to a device for reshaping the contour surface of the plastic injection hole of a metal mold, which metal mold is used in a plastic injection molding apparatus.
Description of Prior Art Every time plastic material is injected into a plastic injection metal mold, the injection nozzle is pushed against the injection hole of the metal mold, and accordingly the contour surface of the ~ injection hole of the metal mold wears. Then, a gap ¦~ 15 appears between the metal mold and the nozzle tip, thus allowing plastic to leak through the gap space.
¦~ The resulting burr of the plastic mold product is caught by the metal mold around its injection hole, thus making it inconvenient to remove the plastic mold product from the metal mold. Therefore, it is necessary to machine the contour surface of the injection entrance to its original shape, so that ` the gap between the metal mold and the nozzle tip may be reduced when the nozzle tip is applied to the injection hole of the metal mold.
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, -2- 132~988 The reshaping work, however, requires removal of a heavy metal mold from a molding apparatus and subsequent attachment of the metal mold to a lathe. This is a tedious and time consuming work. Also, disadvantageously 5 the molding work is interrupted for a relatively long time, and accordingly the efficiency with which molding is effected, lowers.
Summary of the Invention With the above in mind one object of the present 10 invention is to provide a device for reshaping the contour surface of the plastic injection hole of a metal mold which device permits necessary reshaping work in situ without removing the worn metal mold from a molding apparatus and attaching it to a lathe.
To attain this object a device for reshaping the contour sruface of the plastic injection hole of a metal mold according to the present invention comprises: a magnetic block comprising upper and lower intervenient barrier sections of non-magnetic material and opposite 20 concave pieces of magnetic material sandwiching the non-magnetic barrier sections to define a circular hole, and a permanent magnet cylinder rotatably fitted in the circular hole thus defined, thereby causing appearance of the magnetic field across the opposite ends of the 25 magnetic block when the permanent magnet cylinder is rotated to the position in which its poles N and S are on a line parallel to the bottom of the magnetic block, and causing disappearance of the magnetic field across the opposite ends of the magnetic block when the 30 permanent magnet cylinder is rotated to the position in which its poles N and S are on a line perpendicular to the bottom of the magnetic block; an arm one end of which is fixed to the magnetic block and the other end of which arm has a translational rod movable in ,` . ' .; .
. . .
alignment with the central axis of the contour surface of the plastic injection hole of the metal mold; and a cutter tool comprising a housing, a spring-biased trunk contained in and movably fixed to the housing and a 5 cutter blade which is operatively connected to the spring-bias`ed trunk so as to move back and forth under the influence of a spring.
The reshaping device may further comprise a jig which is adapted to be detachably fixed to the magnetic 10 block. The jig has a pointing rod in alignment with the translational rod on the free end of the arm.
According to a preferred embodiment the cutter blade is fixed to the front end of the trunk; the rear colsed end of the housing has a reentrancy to accomodate 15 the tip of the translational rod, and the spring is put in the space between the rear closed end of the housing and the rear end of the trunk.
According to another preferred embodiment the cutter blade is fixed to the front end of the housing, 20 and the trunk is fitted in and movably connented to the housing. The rear of the trunk has a reentrancy to accomodate the tip of the translational rod, and the spring is put in the space between the front end of the trunk and the bottom of the housing.
A retractable arm which is capable of adjusting its length, can be used in place of the arm having a translational rod at its free end.
In use the jig is attaced to the magnetic block, and the permanent magnet cylinder is rotated to the 30 demagnetizing position. The magnetic bolck is moved on the metal mold A until its pointing rod is put in alignment with the injection hole of the metal mold.
Then, the permanent magnet cylinder is rotated to the magnetizing position, thereby causing the magnetic block 35 to attach itself to the metal mold. The jig is removed from the magnetic block, and-then the translational rod is automatically put in alignment with the central axis i of the contour surface of the injection hole.
J. The translational rod is made to advance to sandwich the cutter tool between the contour surface of 5 the injection hole of the metal mold and the translational rod. Then, the cutter blade is rotated by holding and rotating the tool housing by hand until the contour surface of the injection hole is cut to its original shape.
The cutter tool is removed from the arm by ¦ withdrawing the translational rod, and then the the permanent magnet cylinder is rotated to the demagnetizing position, thereby permitting the removal of the magnetic block from the metal mold.
Other objects and advantages of the present invention will be understood from the following description of a preferred embodiment, which is shown in accompanying drawings:
Fig.1 is a side view of a reshaping device 20 according to an embodiment of the present invention in its reshaping position;
Fig.2 is a similar side view, but showing the reshaping device with its jig attaced in place of its ) cutting tool;
Fig.3 is a side view of another cutting tool, partly broken and shown in section;
Fig.4 is a perspectïve view of the reshaping device with its jig attaced in place of its cutting tool;
f 30 Fig.5 is a perspective view of the jig;
Fi9.6 is a cross section of a magnetic bolck in its demagnetizing position;
Fig.7 is a cross section of a magnetic block in its magnetizing position; and ' 35 Fig.8 shows a metal mold in section and an injection nozzle tip.
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-4a-Embodiments Fig. 8 shows a plastic injection mold A and the injection nozzle S of a plastic injection molding apparatus. Every time plastic material is injected into the mold, the nozzle S is pushed against the injection hole of the metal mold A, and accordingly the contour surface T of the injection hole of the metal mold wears. Then, a gap appears between the metal mold and the nozzle tip, thus allowing plastic to leak through the gap space. The resulting burr of the plastic mold product is caught by the metal mold around its injection hole, thus making it inconvenient to remove the plastic mold product from the metal mold. Therefore, it is necessary to machine the contour surface of the injection entrance to its original shape, so that the gap between the metal mold and the nozzle tip may be reduced when the nozzle tip is applied to the injection hole of the metal mold.
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Referring to Fig.4, 6 and 7, a magnetic block 3 is shown as comprising upper and lower intervenient barrier sections of non-magnetic material 1 and opposite concave 5 pieces of ma~netic material 2 sandwiching the non-magnetic barrier sections 1 to define a circular hole, and a permanent magnet cylinder 4 rotatably fitted in the circular hole thus defined. The permanent magnet cylinder 4 is chamfered on opposite sides as indicated 10 at 5, and it has N and S poles. As best shown in Fig.4 a rotary cap H is put on the top of the cylinder 4. The magnetic field will appear across the opposite ends 6 of the magnetic block 3 when the permanent magnet cylinder 4 is rotated by the rotary cap H to the magnetizing '(~ 15 position in which its poles N and S are on a horizontal line parallel to the bottom of the magnetic block 3 (See Fig.7). The magnetic field across the opposite ends 6 of the magnetic block 3 will disappear when the permanent magnet cylinder 4 is rotated to the demagnetization 20 position in which its poles N and S are on a vertical line perpendicular to the bottom of the magnetic block 3 (See Fig.6).
One end of an arm 7 is fixed to the magnetic block 3 and the other end of the arm 7 has a translational 25 screw rod 8 movable in alignment with the central axis s of the contour surface T of the plastic injection hole of a metal mold A.
As shown in Fig.1, a cutter tool comprises a housing 11, a spring-biased trunk 10 contained in and 30 movably fixed to the housing 11 and a cutter blade 9 fixed to the spring-biased trunk 10 so as to move back and forth under the influence of a spring 12.
Specifically the trunk 10 has a key slot 18 on its circumference, and the housing 11 has a key 17. The 35 trunk 10 is inserted in the housing 11 with the key 17 A
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,, extending in the key slot 18 of the trunk surface. The spring 12 is put in the space between the rear closed end of the housing 11 and the rear end of the trunk 10, thus applying a resilient push to the trunk 10 all the time.
Preferably the cutter blade 9 may have a centering ' projection 9a to assure that the cutter blade 9 is put ¦ in exact alignment with the center axis of the injection s hole 15 of the metal mold A. The rear end of the housing 10 11 has a seat metal 19. It has a reentrancy to accomodate the tip of the translational screw rod 8.
As shown in Fig.1, the worn contour surface T of therinjection hole can be reshaped to its original shape simply by rotating the cutter tool by hand, which tool 15 is resiriently pushed against the metal mold A all the time. In this position metal chips cannot enter the cavity C of the metal mold.
Fig.3 shows another cutter tool as comprising a houseing 11 having a cutter blade 9 fixed to its closed 20 front and a trunk 10 fitted in and movably fixed to the housing. Specifically the trunk 10 has a key slot 18 and the housing has a key 17. The trunk 10 is fitted in the hollow space of the housing 10 with the key 17 inserted in the key slot 18.
Fig.5 shows a jig 13 of a transparent synthetic resin, which jig can be detachably fixed to the magnetic block 3. The jig 13 has two opposite legs 13a and a ; pointing rod 16. The pointing rod 16 will be put in ' alignment with the translational screw rod 8 on the free j 30 end of the arm 7 when the jig 3 is attached to the magnetic block 2 with its legs 13a put on the opposite sides of the magnetic block 2.
Then, the magnetic cylinder 4 is rotated to put the magnetic block 3 in its demagnetizing position. The 35 magnetic block 3 is moved on the metal mold A until it reached the position in which the pointing rod 16 can be :,;
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~''' ' ' .. 1 inserted in the injection hole 15 of the metal mold A.
After inserting the pointing rod 16 in the injection hole 15 of the metal mold A the magnetic cylinder 4 is rotated to put the magnetic block 3 in its 5 magnetizing position. Then, the magnetic block 3 is attached to the metal mold A, and the jig 3 along with its pointing rod 16 is removed from the magnetic block 3. The blade 9 of the cutter tool is pushed against the injection hole of the metal mold A, and the 10 translational screw rod 8 is made to advance and push the rear end of the cutter tool until the trunk 10 yieldingly withdraws in the housing 11. Thus, the cutter tool is resiliently supported between the metal mold A
and the translational screw rod 8, and then the cutter 15 tool is put in the exact alignment with the center of the injiction hole of the metal mold A. Reshaping can be effected simply by rotating the cutter tool by hand.
A retractable arm which is capable of adjusting its length, can be used in place of the arm 7 having a screw rod 8 at its free end.
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Claims (5)
1. A device for reshaping the contour surface of the plastic injection hole of a metal mold comprising:
a magnetic block 3 comprising upper and lower intervenient barrier sections of non-magnetic material 1 and opposite concave pieces of magnetic material 2 sandwiching the non-magnetic barrier sections 1 to define a circular hole, and a permanent magnet cylinder 4 rotatably fitted in the circular hole thus defined, thereby causing appearance of the magnetic field across the opposite ends 6 of the magnetic block 3 when the permanent magnet cylinder 4 is rotated to the position in which its poles N and S are on a line parallel to the bottom of the magnetic block 3, and causing disappearnce of the magnetic field across the opposite ends 6 of the magnetic block 3 when the permanent magnet cylinder 4 is rotated to the position in which its poles N and S are on a line perpendicular to the bottom of the magnetic block 3;
an arm 7 one end of which is fixed to the magnetic block 3 and the other end of which arm 7 has a translational rod 8 movable in alignment with the central axis of the contour surface T of the plastic injection hole of the metal mold A; and a cutter tool comprising a housing 11, a spring-biased trunk 11 contained in and movably fixed to the housing 11 and a cutter blade 9 which is operatively connected to the spring-biased trunk 10 so as to move back and forth under the influence of a spring 12.
a magnetic block 3 comprising upper and lower intervenient barrier sections of non-magnetic material 1 and opposite concave pieces of magnetic material 2 sandwiching the non-magnetic barrier sections 1 to define a circular hole, and a permanent magnet cylinder 4 rotatably fitted in the circular hole thus defined, thereby causing appearance of the magnetic field across the opposite ends 6 of the magnetic block 3 when the permanent magnet cylinder 4 is rotated to the position in which its poles N and S are on a line parallel to the bottom of the magnetic block 3, and causing disappearnce of the magnetic field across the opposite ends 6 of the magnetic block 3 when the permanent magnet cylinder 4 is rotated to the position in which its poles N and S are on a line perpendicular to the bottom of the magnetic block 3;
an arm 7 one end of which is fixed to the magnetic block 3 and the other end of which arm 7 has a translational rod 8 movable in alignment with the central axis of the contour surface T of the plastic injection hole of the metal mold A; and a cutter tool comprising a housing 11, a spring-biased trunk 11 contained in and movably fixed to the housing 11 and a cutter blade 9 which is operatively connected to the spring-biased trunk 10 so as to move back and forth under the influence of a spring 12.
2. A device for reshaping the contour surface of the plastic injection hole of a mold according to claim 1 wherein it further comprises a jig 13 detachably fixed to the magnetic block 3, said jig has a pointing rod 16 in alignment with the translational rod 8 on the free end of the arm 7.
3. A device for reshaping the contour surface of the plastic injection hole of a mold according to claim 1 wherein the cutter blade 9 is fixed to the front end of the trunk 10 within the housing 11; the rear closed end of the housing 11 has a reentrancy to accomodate the tip of the translational rod 8; and the spring 12 is put in the space between the rear closed end of the housing 11 and the rear end of the trunk 10.
4. A device for reshaping the contour surface of the plastic injection hole of a mold according to claim 1 wherein the cutter blade 9 is fixed to the front closed end of the housing 11; the rear end 19 of the trunk 10 within the housing 11 has a reentrancy to accomodate the tip of the translational rod 8; and the spring 12 is put in the space between the front closed end of the housing 11 and the front end of the trunk 10.
5. A device for reshaping the contour surface of the plastic injection hole of a metal mold comprising:
a magnetic block 3 comprising upper and lower intervenient barrier sections of non-magnetic material 1 and opposite concave pieces of magnetic material 2 sandwiching the non-magnetic barrier sections 1 to define a circular hole, and a permanent magnet cylinder 4 rotatably fitted in the circular hole thus defined, thereby causing appearance of the magnetic field across the opposite ends 6 of the magnetic block 3 when the permanent magnet cylinder 4 is rotated to the position in which its poles N and S are on a line parallel to the bottom of the magnetic block 3, and causing disappearnce of the magnetic field across the opposite ends 6 of the magnetic block 3 when the permanent magnet cylinder 4 is rotated to the position in which its poles N and S are on a line perpendicular to the bottom of the magnetic block 3;
a retractable arm which is capable of adjusting its length; and a cutter tool comprising a housing 11, a spring-biased trunk 10 contained in and movably fixed to the housing 11 and a cutter blade 9 which is operatively connected to the spring-biased trunk 10 so as to move back and forth under the influence of a spring 12.
a magnetic block 3 comprising upper and lower intervenient barrier sections of non-magnetic material 1 and opposite concave pieces of magnetic material 2 sandwiching the non-magnetic barrier sections 1 to define a circular hole, and a permanent magnet cylinder 4 rotatably fitted in the circular hole thus defined, thereby causing appearance of the magnetic field across the opposite ends 6 of the magnetic block 3 when the permanent magnet cylinder 4 is rotated to the position in which its poles N and S are on a line parallel to the bottom of the magnetic block 3, and causing disappearnce of the magnetic field across the opposite ends 6 of the magnetic block 3 when the permanent magnet cylinder 4 is rotated to the position in which its poles N and S are on a line perpendicular to the bottom of the magnetic block 3;
a retractable arm which is capable of adjusting its length; and a cutter tool comprising a housing 11, a spring-biased trunk 10 contained in and movably fixed to the housing 11 and a cutter blade 9 which is operatively connected to the spring-biased trunk 10 so as to move back and forth under the influence of a spring 12.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26987287A JPH01110922A (en) | 1987-10-26 | 1987-10-26 | Resurfacing device of nozzle touching surface of injection mold |
| CA000597011A CA1328988C (en) | 1987-10-26 | 1989-04-18 | Device for reshaping the contour surface of the plastic injection hole of a metal mold |
| DE3913189A DE3913189A1 (en) | 1987-10-26 | 1989-04-21 | Restoring appts. of nozzle contact surfaces of moulds |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26987287A JPH01110922A (en) | 1987-10-26 | 1987-10-26 | Resurfacing device of nozzle touching surface of injection mold |
| CA000597011A CA1328988C (en) | 1987-10-26 | 1989-04-18 | Device for reshaping the contour surface of the plastic injection hole of a metal mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1328988C true CA1328988C (en) | 1994-05-03 |
Family
ID=25672628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000597011A Expired - Fee Related CA1328988C (en) | 1987-10-26 | 1989-04-18 | Device for reshaping the contour surface of the plastic injection hole of a metal mold |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPH01110922A (en) |
| CA (1) | CA1328988C (en) |
| DE (1) | DE3913189A1 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1247976B (en) * | 1959-06-02 | 1967-08-17 | Mechanika Narodni Podnik | Magnetic adhesive device with permanent magnet |
| JPS61274913A (en) * | 1985-05-31 | 1986-12-05 | Fumiyuki Shiina | Apparatus for re-shaving nozzle engaging part of injection mold |
-
1987
- 1987-10-26 JP JP26987287A patent/JPH01110922A/en active Granted
-
1989
- 1989-04-18 CA CA000597011A patent/CA1328988C/en not_active Expired - Fee Related
- 1989-04-21 DE DE3913189A patent/DE3913189A1/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| DE3913189A1 (en) | 1990-10-25 |
| JPH0479810B2 (en) | 1992-12-17 |
| JPH01110922A (en) | 1989-04-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |