CN117260564A - Pliers for plastic model making and cutting blade - Google Patents
Pliers for plastic model making and cutting blade Download PDFInfo
- Publication number
- CN117260564A CN117260564A CN202211193712.0A CN202211193712A CN117260564A CN 117260564 A CN117260564 A CN 117260564A CN 202211193712 A CN202211193712 A CN 202211193712A CN 117260564 A CN117260564 A CN 117260564A
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- China
- Prior art keywords
- blade
- pliers
- fixing
- cutting blade
- fixed
- 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.)
- Pending
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- 238000005520 cutting process Methods 0.000 title claims abstract description 157
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- 238000003780 insertion Methods 0.000 claims description 64
- 230000037431 insertion Effects 0.000 claims description 64
- 230000002452 interceptive effect Effects 0.000 claims description 6
- 238000010137 moulding (plastic) Methods 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 7
- 230000007774 longterm Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000002087 whitening effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 210000001015 abdomen Anatomy 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B7/00—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools
- B25B7/22—Pliers provided with auxiliary tool elements, e.g. cutting edges, nail extractors
Abstract
The subject of the invention is to provide a novel structure mainly for pliers and cutting blade for plastic model manufacture for cutting off the gate connecting plastic model parts. A pair of half members (11A, 11B) are rotatably connected to a connecting part (3), a cutting blade (22) is detachably provided to one half member (11A), a receiving plate part (24) facing the cutting blade (22) is provided to the other half member (11B), or the cutting blade (22) is detachably provided to each half member (11A, 11B).
Description
Technical Field
The present invention relates to pliers that are cutting tools and to a cutting blade, and more particularly to pliers for plastic mold production for cutting a gate connecting a part of a mold such as a plastic mold.
Background
Conventionally, for example, patent document 1 discloses a pair of pliers for cutting off a gate portion of a component connected to a plastic mold by the pliers, and cutting off the component.
The problem in patent document 1 is to eliminate the damage of the component or the defect of leaving an excessively long gate by leaving a gate of a fixed length.
Prior art literature
Patent literature
Patent document 1: japanese patent application laid-open No. 2015-085183
Disclosure of Invention
Problems to be solved by the invention
As the number of times of cutting by the pliers increases, sharpness of the pliers deteriorates, and cutting failure occurs, and there is a concern that cutting may not be performed once, and a plurality of times of cutting may be performed, a force may be required, and the load on an operator may be increased.
If the sharpness is deteriorated, a flat cut surface cannot be formed, and a protrusion is generated in the resin, so-called whitening occurs, which may deteriorate the appearance of the component. Further, there is a concern that the work load of filing after cutting the parts increases.
The sharpness problem described above is caused by abrasion of the blade of the pliers, and the operator must discard the pliers with deteriorated sharpness and purchase new pliers.
Purchasing new pliers can create an economic burden to the user. In addition, the pliers are discarded although the blade is not worn out, and the pliers are not environmentally friendly.
Further, considering the idea that users wish to prefer long-term use of conventional tools, there is a need for a novel pliers that responds to such user's idea.
In view of the above problems, the present invention proposes a novel structure for a plastic mold forming pliers for cutting a gate connecting plastic mold parts.
Means for solving the problems
The problems to be solved by the present invention are as described above, and the following describes a solution to this problem.
According to one embodiment of the present invention, there is provided a pair of pliers for plastic mold production for cutting a gate or the like to which a plastic mold part is connected, the pliers being configured such that a pair of half members are rotatably connected to a connecting portion, a cutting blade is detachably provided to one half member, a receiving plate portion facing the cutting blade is provided to the other half member, or the cutting blades are detachably provided to the respective half members.
Further, according to an embodiment of the present invention, the cutting blade has a portion to be fixed, which is fixed to a blade fixing portion formed in the half member, and the portion to be fixed is pressed by a fixing member that fixes the blade fixing portion to be fixed to the blade fixing portion.
Further, according to an embodiment of the present invention, the fixing member is fixed to the blade fixing portion by the fixing tool, and the portion to be fixed of the cutting blade is formed with an insertion portion for enabling the cutting blade to be removed from the blade fixing portion without interfering with the fixing tool in a state where the fixing tool is released without removing the fixing member from the blade fixing portion.
Further, according to an embodiment of the present invention, the fixed portion is formed with a pair of insertion portions, and an insertion portion is formed between the pair of insertion portions, the insertion portion is formed in a substantially U-shape, and the fixing tool is inserted into the insertion portion.
Further, according to an embodiment of the present invention, an engaging concave portion is formed in a bottom surface portion of the blade fixing portion, and an engaging convex portion is provided in the fixing member, and the engaging convex portion is inserted into the engaging concave portion in a state of pressing the fixed portion.
Further, according to an embodiment of the present invention, the engaging convex portion of the fixing member is inserted into the insertion portion.
Further, according to an embodiment of the present invention, the engaging convex portion is formed in a shaft shape having two wall surfaces parallel to each other, and is configured such that an inner end surface of the insertion portion abuts against the wall surface, and a fixed angle of the cutting blade is defined by the abutment.
In addition, according to an embodiment of the present invention, the fixing member is formed of a plate-like plate member, and at least one end surface of the fixing member abuts against a side wall provided in the blade fixing portion to restrict rotation of the fixing member.
Further, according to an embodiment of the present invention, the closing angle adjusting mechanism for adjusting the closing angle of the cutting operation portion is provided, so that the angle of the cutting blade with respect to the receiving plate portion at the time of cutting can be adjusted with high accuracy after the cutting blade is replaced.
Further, according to an embodiment of the present invention, the receiving plate portion is detachably provided to the half member.
Further, according to an embodiment of the present invention, there is provided a cutting blade for replacement of pliers for plastic mold production for cutting a gate or the like to which a plastic mold part is connected, the cutting blade having a fixed portion fixed to a blade fixing portion formed in a half member constituting the pliers, the fixed portion being pressed by a fixing member fixing the blade fixing portion to be fixed to the blade fixing portion, an insertion portion being formed in the fixed portion of the cutting blade, the insertion portion being configured to be capable of sliding the cutting blade from the blade fixing portion without interfering with the fixture in a state where the fixture is released without removing the fixing member from the blade fixing portion.
Further, according to an embodiment of the present invention, the fixed portion is formed with a pair of insertion portions, and an insertion portion is formed between the pair of insertion portions, the insertion portion is formed in a substantially U-shape, and the fixing tool is inserted into the insertion portion.
Effects of the invention
The present invention exhibits the following effects.
That is, according to an embodiment of the present invention, the cutting blade can be replaced and the pliers can be used continuously, and the environment-friendly configuration can be achieved in which the need for new pliers is eliminated and the environmental load is suppressed. And also in response to user ideas that wish to prefer long-term use of the conventional tools.
Drawings
FIG. 1 is a schematic view of a plastic molding pliers;
fig. 2 is a diagram showing a state in which a gate of a connecting part is cut in plastic molding;
fig. 3 is a diagram showing a configuration of the cutting operation unit;
fig. 4 (a) is a diagram illustrating a cutting blade, a blade fixing portion, and the like; (B) The relationship between the cutting edge and the engaging convex part is shown; (C) is a view showing a state of fixing the cutting blade;
fig. 5 (a) is a diagram illustrating a cutting blade, a blade fixing portion, and the like; (B) A diagram showing a state in which a gate of a plastic mold is cut;
fig. 6 (a) is a view showing a state where the cutting edge is fixed; (B) is a diagram for explaining a state in which the cutting blade is slid;
fig. 7 (a) is a view showing a state where the cutting edge is fixed; (B) is a diagram for explaining a state in which the cutting blade is slid.
Description of the reference numerals
1: pliers with pliers body
3: connecting shaft
5: clamping material
7: elastic member
9: stop member
10: grip operation part
11A: half component
11B: half component
12: blade fixing part
12a: bottom surface portion
12b: side wall
12c: side wall
12d: side wall
12m: horizontal part
12n: inclined part
13a: fixing hole
13b: engagement concave portion
14: fixing member
14a: through hole
14b: engaging convex part
16: fixing tool
20: cutting operation part
22: cutting edge
22a: abdomen part
22b: blade part
22c: tip part
22d: back part
22e: fixed part
22f: insertion part
22g: insertion part
22h: insertion part
22k: pressed surface
22m: flat part
24: bearing plate
24a: bearing surface
60: gate
Detailed Description
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in fig. 1, the pliers 1 for plastic molding according to the present invention is configured such that a pair of half members 11A, 11B are rotatably connected to a connecting portion 3, a grip operation portion 10 is formed on one side of the connecting portion 3, and a cutting operation portion 20 is formed on the other side of the connecting portion 3.
As shown in fig. 2, the pliers 1 for plastic mold production according to the present invention is suitable for cutting a gate 60 connecting a part 62 and a runner 64 of a plastic mold, and has a technique of maintaining sharpness well without whitening a cut surface of the gate 60.
As will be described in detail below, in the grip operation section 10, each of the half members 11A and 11B is formed of a bar-shaped member formed by bending a metal such as stainless steel, as shown in fig. 1. In each of the half members 11A and 11B, a region to be held by a user is covered with a synthetic resin-made grip material 5. The holding material 5 has elasticity, and can reduce the impact of cutting and directly transmit to the hand of the user, and is not easy to slide when holding.
In the grip operation portion 10, an elastic member 7 is disposed in the vicinity of the connecting portion 3. The elastic member 7 is constituted by, for example, a coil spring, and has one end abutting against the inner side surface of the half member 11A and the other end engaged with the inner side surface of the half member 11B. When the user grips the grip operation portion 10 and applies a force, the elastic member 7 is gripped by the two half members 11A and 11B and contracts, so that an elastic reaction force is generated, and potential energy is applied in a direction to open the grip operation portion 10. In this way, the operation part 10 is automatically opened by being gripped after the cutting operation while applying a suitable reaction force, and the repeated cutting operation can be easily performed.
The half members 11A and 11B are provided with engagement portions 17 that engage with each other at a predetermined opening angle, and the opening angle of the grip operation portion 10 in the non-energized state is set to a predetermined angle. Then, the opening angle of the cutting operation unit 20 is also set to a predetermined angle.
In the grip operation portion 10, a stopper member 9 is provided at a position farther from the connecting portion 3 than the elastic member 7. The stopper member 9 is constituted by, for example, a bolt having a flat contact portion formed at the tip end thereof, is nut-stopped so as to protrude from the inner side surface of the one half member 11B, and the tip end of the bolt contacts the inner side surface of the other half member 11A. When the user grips the grip operation portion 10 and applies force, the stopper member 9 is sandwiched between the two half members 11A and 11B, and rotation of the two half members 11A and 11B is restricted. Thus, even if the force is further applied, the two half members 11A and 11B do not rotate, and damage to the cutting blade 22 or the receiving plate 24 due to excessive force applied to the cutting operation portion 20 can be prevented.
The stopper member 9 can adjust the protruding amount from the half member 11B by loosening the nut 8, thereby forming a closing angle adjusting mechanism K for adjusting the closing angle of the cutting operation unit 20. By this closing angle adjusting mechanism K, the angle of the cutting blade 22 with respect to the receiving plate 24 can be adjusted with high accuracy, and the optimum sharpness can be achieved. This configuration is particularly effective in a configuration in which the cutting blade 22 can be replaced.
As shown in fig. 1 and 3, the cutting operation unit 20 includes: a cutting blade 22 provided at the front end of the half member 11A on one side; and a receiving plate portion 24 provided at the front end of the other half member 11B.
As shown in fig. 3, a blade fixing portion 12 for fixing the cutting blade 22 is formed at the front end of the half member 11A. The blade fixing portion 12 is configured to have: a bottom surface portion 12a that abuts against the bottom surface side of the cutting edge 22; a pair of side walls 12b, 12c rising from the bottom surface 12a and facing each other; and a side wall 12d that stands up so as to connect the pair of side walls 12b, 12c, and forms a substantially -shaped wall together with the pair of side walls 12b, 12 c. The blade fixing portion 12 is configured to have an open end 12x formed on a side facing the side wall 12d without forming a side wall, and is configured to allow the cutting blade 22 to slide into the blade fixing portion 12 or to be pulled out from the blade fixing portion 12, as will be described in detail later.
As shown in fig. 3, a fixing member 14 is fixed to the blade fixing portion 12, and the fixing member 14 is used to clamp and fix the fixed portion 22e of the cutting blade 22. The fixing member 14 is formed of a plate-like plate member, and has a through hole 14a penetrating in the plate thickness direction, the shaft portion 16a of the fixing tool 16 is inserted into the through hole 14a through the through hole 14a, and the shaft portion 16a of the fixing tool 16 is inserted into the fixing hole 13a of the bottom surface portion 12 a. In the present embodiment, the fixing tool 16 is a hexagon bolt, and the fixing hole 13a is a screw hole, but the present invention is not limited to this configuration, and may be configured to be capable of being fixed without using a hexagon wrench or the like.
As shown in fig. 3 and fig. 4 (a) and (B), the side wall 12d of the blade fixing portion 12 is not formed with a side wall but is formed with an open end 12x, and the open end 12x is inclined in the following manner: the closer to the receiving plate portion 24, the more advanced the cutting blade 22 is in the insertion direction. Thereby, the distance 22L of the blade 22b is lengthened, and a wider area for cutting can be ensured.
As shown in fig. 3 and fig. 4 (a) and (B), in the fixing member 14, the engaging convex portion 14B protrudes and the engaging convex portion 14B is inserted into the engaging concave portion 13B of the bottom surface portion 12a, whereby the rotation of the fixing member 14 is restricted, and the loosening of the fixing tool 16 can be prevented. For example, the engaging convex portion 14b may be formed in a shaft shape having two parallel wall surfaces, and the engaging concave portion 13b of the bottom surface portion 12a may be formed in a rectangular shape in cross section, in addition to a long hole shape in cross section and a configuration in which they are fitted to each other.
As shown in fig. 3 and 4 (C), the fixing member 14 is formed of a substantially rectangular plate-like member, and has three side end surfaces that are in contact with the side walls 12b, 12C, and 12d, respectively. Thereby restricting the rotation of the fixing member 14 and preventing the fixing tool 16 from being released. The shape of the fixing member 14 is not particularly limited to a rectangular shape, as long as the fixing member 14 is limited to rotation by the side end surface abutting against the side wall of the blade fixing portion 12.
As shown in fig. 3, in the fixing member 14, an end 14c near the distal end of the forceps 1 is formed to be gradually thinner, and a large step is not formed at the boundary between the cutting blade 22 and the fixing member 14 on the distal end side of the forceps 1.
As shown in fig. 3 and fig. 4 (a), the cutting blade 22 includes a web portion 22a, a blade portion 22b, a tip portion 22c, a back portion 22d, and a fixed portion 22e. The cutting blade 22 is detachable from the blade fixing portion 12, and is configured to be replaceable as a so-called replaceable blade. The thickness H (fig. 5 (a)) of the cutting blade 22 is set to be 0.8mm to 1.0mm so as to be thinner at the thickest part, and preferably a thickness that can exhibit excellent sharpness and ensure sufficient strength when cutting the gate of the plastic mold.
As shown in fig. 3 and 4 (a), a substantially U-shaped insertion portion 22h that is open on the opposite side of the tip portion 22c is formed in the fixed portion 22e of the cutting blade 22, and the shaft portion 16a and the engaging convex portion 14b of the fastener 16 are inserted into this insertion portion 22h. In the fixed portion 22e, two insertion portions 22f and 22g are formed with the insertion portion 22h interposed therebetween, and the cutting edge 22 is positioned with respect to the edge fixing portion 12 by the tips of the insertion portions 22f and 22g abutting against the side wall 12 d.
Further, by inserting the shaft portion 16a and the engagement convex portion 14b of the holder 16 into the insertion portion 22h, the movement direction of the cutting blade 22 can be guided at two points by the engagement convex portion 14b when the cutting blade 22 slides, and the cutting blade 22 can be pulled out straight. If either one of the shaft portion 16a and the engagement convex portion 14b of the holder 16 is guided to a point, the rotation of the cutting blade 22 in the horizontal plane cannot be restricted, and there is a concern that the finger may be injured by unexpected rotation. According to the configuration of the present embodiment, a configuration with higher security is realized.
As shown in fig. 5 (a), a bottom surface portion 22m is formed in the fixed portion 22e of the cutting blade 22, and the bottom surface portion 22m has a uniform thickness. On the other hand, a horizontal portion 12m corresponding to the bottom surface portion 22m is formed in the bottom surface portion 12a of the edge fixing portion 12. The insertion portions 22f and 22g of the cutting blade 22 are in contact with the horizontal portion 12m.
As shown in fig. 5 (a), the depth D of the bottom surface portion 12a of the blade fixing portion 12 is configured to be deeper than the thickness H of the portion 22e to be fixed of the cutting blade 22, whereby the portion 22e to be fixed of the cutting blade 22 is accommodated in the blade fixing portion 12. Then, in a state where the fixed portion 22e (bottom surface portion 22 m) of the cutting blade 22 is placed on the bottom surface portion 12a, the upper surface of the fixed portion 22e (insertion portions 22f, 22 g) of the cutting blade 22 constitutes a flat pressed surface 22k. The flat pressed surface 22k is pressed from above by the fixing member 14, and the holder 16 is locked, whereby the cutting blade 22 is fixed to the blade fixing portion 12 as shown in fig. 5 (B).
As shown in fig. 6 (a) and 7 (a), the cutting blade 22 is pressed from above by the fixing member 14 by the lock fixture 16 and is used for cutting a gate or the like, not shown, when manufacturing a plastic mold.
Then, in the case where the sharpness of the cutting edge 22 is deteriorated, as shown in fig. 6 (B) and fig. 7 (B), the cutting edge 22 can be replaced. Specifically, by releasing the holder 16 and weakening the pressing of the cutting edge 22 by the fixing member 14, the cutting edge 22 can be slid and pulled out from the edge fixing portion 12. In fig. 7 (B), a gap D is formed between the fixing member 14 and the cutting blade 22, and the cutting blade 22 is slidably moved.
Here, since the insertion portion 22h of the cutting blade 22 has a substantially U-shape, the cutting blade 22 is pulled out only by releasing the fastener 16 without being removed. When a new unused cutting blade 22 is attached, the cutting blade 22 may be inserted in a state where the fixing member 14 is temporarily fixed by the fixing tool 16. In this way, the blade fixing portion 12 can be easily replaced.
The shape of the insertion portion 22h formed in the fixed portion 22e, or the number or shape of the insertion portions 22f and 22g is not particularly limited, and may be configured to have only the insertion portion 22f, for example, so long as the fixing tool 16 and the fixed portion 22e do not interfere with each other when the cutting blade 22 is replaced.
Further, since the replacement operation of the cutting blade 22 is performed without removing the holder 16, the holder 16 or the fixing member 14, which is a small component, can be prevented from falling off or being lost due to falling off, and the time and labor for positioning and reinstalling the hole of the holder 16 or the fixing member 14 can be further reduced, thereby realizing an easy-to-handle configuration.
In particular, since the cutting blade 22 has the sharp portion, that is, the blade portion 22b, the simultaneous processing of the fixture 16 or the fixing member 14 with the cutting blade 2 involves a risk of damaging the finger or the like, but since the fixture 16 or the fixing member 14 can be temporarily fixed, it is only necessary to pay attention to the processing of the cutting blade 22, and a design excellent in safety can be realized.
As shown in fig. 5 (B), the receiving plate portion 24 has a flat receiving surface 24a facing the blade portion 22B of the cutting blade 22. For example, when cutting the gate 60 connected to the component of the plastic mold, the blade portion 22b of the cutting blade 22 cuts from the opposite side of the gate 60 while supporting one side of the gate 60 with the receiving surface 24a, and the blade portion 22b reaches the receiving surface 24a to completely cut the gate 60.
The receiving plate portion 24 may be formed integrally with the half member 11B (fig. 3), or may be formed of another member fixed to the half member 11B (fig. 3). The receiving plate portion 24 may be removable from the half member 11B (fig. 3) or replaceable. In this case, for example, the receiving plate portion 24 is considered to be configured such that the blade portion 22b is changed to the receiving surface 24a at the cutting edge 22. The other cutting edge may be attached instead of the receiving plate 24, or a so-called double-edged pliers may be formed.
The present invention may be practiced as described above.
That is, as shown in FIGS. 1 to 7,
a pliers (1) for cutting off a gate or the like connecting plastic mold parts,
a pair of pliers (1) for rotatably connecting a pair of half members (11A, 11B) to a connecting part (3),
the cutting blade 22 is detachably provided to one half member 11A, and the receiving plate portion 24 facing the cutting blade 22 is provided to the other half member 11B, or
The cutting blade 22 is detachably provided to each of the half members 11A and 11B.
This allows replacement of the cutting blade 22 and continued use of the pliers, and thus, an environment-friendly construction that also suppresses environmental load can be achieved without purchasing new pliers. And, it is also responsive to the mind of a user desiring to prefer long-term use of a conventional tool.
And, as shown in FIG. 3,
the cutting edge 22 has a fixed portion 22e, and the fixed portion 22e is fixed to the edge fixing portion 12 formed in the half member 11A, and the fixed portion 22e is pressed by the fixing member 14 that fixes the edge fixing portion 12 to be fixed to the edge fixing portion 12.
Thus, the fixed portion 22e is pressed by the fixing member 14, and the cutting blade 22 can be reliably fixed.
As shown in (a) and (B) of fig. 3 and 4,
the fixing member 14 is fixed to the blade fixing portion 12 by means of the fixing tool 16,
an insertion portion 22h is formed in the fixed portion 22e of the cutting blade 22,
the insertion portion 22h is configured to be capable of being removed from the blade fixing portion 12 without interfering with the fixture 16 by sliding the cutting blade 22 in a state where the fixture 16 is released and the fixing member 14 is not removed from the blade fixing portion 12.
Thus, since the replacement operation of the cutting blade 22 is performed without removing the holder 16, the holder 16 or the fixing member 14, which is a small component, can be prevented from falling off or being lost due to falling off, and the time and labor for positioning and reinstalling the hole of the holder 16 or the fixing member 14 can be further reduced, thereby realizing an easy-to-handle configuration.
As shown in (B) and (C) of fig. 4,
the fixed portion 22e is formed with a pair of insertion portions 22f, 22g,
an insertion portion 22h is formed between the pair of insertion portions 22f and 22g,
the insertion portion 22h is formed in a substantially U-shape,
the fixture 16 is inserted into the insertion portion 22h.
Thus, the cutting blade 22 is slid so that the holder 16 passes between the insertion portions 22f, 22g and is detached from the blade fixing portion 12.
As shown in (a) and (B) of fig. 3 and 4,
an engagement concave portion 13b is formed in a bottom surface portion 12a of the blade fixing portion 12,
the fixing member 14 is provided with an engaging convex portion 14b, and the engaging convex portion 14b is inserted into the engaging concave portion 13b in a state of pressing the fixed portion 22e.
Thus, the engaging convex portion 14b is inserted into the engaging concave portion 13b of the bottom surface portion 12a, so that the rotation of the fixing member 14 is restricted, and the fixing tool 16 can be prevented from being released.
And, as shown in (B) of FIG. 4,
the engagement convex portion 14b of the fixing member 14 is inserted into the insertion portion 22h.
Thus, the movement direction of the cutting blade 22 can be guided at two points by the engaging convex portion 14b when the cutting blade 22 slides, and the cutting blade 22 can be pulled out straight.
And, as shown in (B) of FIG. 4,
the engaging convex portion 14b is formed in an axial shape having two wall surfaces 14x, 14x parallel to each other, and is formed such that inner end surfaces 22m, 22m of the insertion portion 22h come into contact with the wall surfaces 14x,
the fixed angle of the cutting edge 22 is defined by this abutment.
Thus, the fixed angle of the cutting edge 22 in the horizontal plane can be defined by the engaging convex portion 14b, and the disadvantage such as deterioration of sharpness due to the fixed angle shift of the cutting edge 22 can be prevented.
And, as shown in FIG. 3,
the fixing member 14 is constituted by a plate-like plate member,
at least one side end surface of the fixing member 14 abuts against a side wall provided on the blade fixing portion 12, and rotation of the fixing member 14 is restricted.
Thereby, the rotation of the fixing member 14 is restricted, and the fixing tool 16 can be prevented from being released.
The receiving plate portion 24 shown in fig. 3 is detachably provided to the half member 11B.
Thus, for example, when the receiving plate portion 24 is damaged and the sharpness is deteriorated, the receiving plate portion 24 can be replaced and the forceps can be used continuously without replacement.
As shown in fig. 1, a closing angle adjusting mechanism K for adjusting the closing angle of the cutting operation unit 20 is provided, so that the angle of the cutting blade 22 with respect to the receiving plate 24 at the time of cutting can be adjusted with high accuracy after the cutting blade 22 is replaced.
Thus, the angle of the cutting blade 22 with respect to the receiving plate 24 at the time of cutting the gate can be finely adjusted with high accuracy after the cutting blade 22 is replaced, and the desired sharpness can be achieved. In particular, in the structure in which the cutting blade 22 can be replaced, there is a concern that the sharpness of the gate and whitening of the cut surface may be affected by variations in the attachment state by the user. Thus, by providing the closing angle adjusting mechanism K, the so-called contact state when the cutting blade 22 and the receiving plate portion 24 are completely closed can be adjusted, and excellent feeling of use can be provided to the user. This technique is quite different from a common pliers used for cutting an electric wire, a metal wire, or the like, in that it solves a problem peculiar to a plastic molding field in which the appearance of a cut surface of a gate is extremely important, and from a technique in which only the cutting blade 22 can be replaced.
And, as shown in FIGS. 1 to 7,
a cutting blade 22 for replacement for pliers for plastic mold production, wherein the pliers 22 for plastic mold production are used for cutting a gate or the like to which plastic mold parts are connected,
the cutting blade 22 has a portion 22e to be fixed to a blade fixing portion 12 formed in the half member 11A constituting the pliers 1,
the fixed portion 22e is pressed by the fixing member 14 for fixing the edge fixing portion 12 and fixed to the edge fixing portion 12,
an insertion portion 22h is formed in the fixed portion 22e of the cutting blade 22,
the insertion portion 22h is configured to be capable of being removed from the blade fixing portion 12 without interfering with the fixture 16 by sliding the cutting blade 22 in a state where the fixture 16 is released and the fixing member 14 is not removed from the blade fixing portion 12.
As shown in (B) and (C) of fig. 4,
the fixed portion 22e is formed with a pair of insertion portions 22f, 22g,
an insertion portion 22h is formed between the pair of insertion portions 22f and 22g,
the insertion portion 22h is formed in a substantially U-shape,
the fixture 16 is inserted into the insertion portion 22h.
Claims (12)
1. A pair of pliers for plastic model production is characterized in that the pliers are used for cutting off a sprue for connecting plastic model parts,
a pair of half members are rotatably connected to the connecting portion,
a cutting blade is detachably provided on one half member, and a receiving plate portion facing the cutting blade is provided on the other half member, or
The cutting blade is detachably provided to each half member.
2. The pair of pliers for plastic modeling according to claim 1, wherein the cutting blade has a portion to be fixed, the portion to be fixed being fixed to a blade fixing portion formed in the half member,
the fixed portion is pressed by a fixing member that fixes the blade fixing portion and is fixed to the blade fixing portion.
3. The plastic mold forming pliers according to claim 2, wherein,
the fixing member is fixed to the blade fixing portion by a fixing tool,
an insertion portion is formed in the fixed portion of the cutting blade,
the insertion portion is configured to be capable of being removed from the blade fixing portion without interfering with the fixture to slide the cutting blade in a state where the fixture is released without removing the fixing member from the blade fixing portion.
4. The pair of pliers for plastic modeling according to claim 3, wherein the fixed portion is formed with a pair of insertion portions,
the insertion portion is formed between the pair of insertion portions,
the insertion portion is formed in a substantially U-shape,
the fixture is inserted into the insertion portion.
5. The pair of pliers for plastic modeling according to claim 4, wherein the blade fixing portion has a bottom surface portion with an engaging recess,
the fixing member is provided with an engagement convex portion, and the engagement convex portion is inserted into the engagement concave portion in a state of pressing the fixed portion.
6. The pair of pliers for plastic modeling according to claim 5, wherein the engaging protrusion of the fixing member is inserted into the insertion portion.
7. The pair of pliers for plastic modeling according to claim 6, wherein the engaging protrusion is formed in a shaft shape having two parallel wall surfaces, and is formed such that an inner end surface of the insertion portion abuts against the wall surfaces,
the fixed angle of the cutting edge is defined by the abutment.
8. The plastic mold forming pliers according to claim 7, wherein the fixing member is formed of a plate-like plate member,
at least one side end surface of the fixing member abuts against a side wall provided on the blade fixing portion, and rotation of the fixing member is restricted.
9. The pliers for plastic modeling according to claim 8, wherein a closing angle adjusting mechanism for adjusting a closing angle of the cutting operation unit is provided, and an angle of the cutting blade with respect to the receiving plate unit at the time of cutting can be adjusted with high accuracy after the cutting blade is replaced.
10. The plastic model forming pliers according to any one of claims 1 to 9, wherein the receiving plate portion is detachably provided to the half member.
11. A cutting blade for replacement of pliers for plastic molding, characterized in that the pliers for plastic molding are used for cutting off a gate connecting plastic mold parts,
the cutting blade has a fixed part fixed to a blade fixing part formed on a half member constituting the pliers,
the fixed part is pressed by a fixing member for fixing the blade fixing part and is fixed on the blade fixing part,
an insertion portion is formed in the fixed portion of the cutting blade,
the insertion portion is configured to be capable of being removed from the blade fixing portion without interfering with the fixture to slide the cutting blade in a state where the fixture is released without removing the fixing member from the blade fixing portion.
12. The cutting blade for replacement of pliers for plastic modeling as defined in claim 11, wherein the fixed part is formed with a pair of insertion parts,
the insertion portion is formed between the pair of insertion portions,
the insertion portion is formed in a substantially U-shape,
the fixture is inserted into the insertion portion.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2022095545A JP7138288B1 (en) | 2022-06-14 | 2022-06-14 | Nippers for making plastic models and cutting blades |
| JP2022-095545 | 2022-06-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117260564A true CN117260564A (en) | 2023-12-22 |
Family
ID=83318372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211193712.0A Pending CN117260564A (en) | 2022-06-14 | 2022-09-28 | Pliers for plastic model making and cutting blade |
Country Status (2)
| Country | Link |
|---|---|
| JP (2) | JP7138288B1 (en) |
| CN (1) | CN117260564A (en) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4214717Y1 (en) * | 1964-06-02 | 1967-08-22 | ||
| JPS5635182Y2 (en) * | 1977-07-15 | 1981-08-19 | ||
| JPS5424196U (en) * | 1977-07-20 | 1979-02-16 | ||
| JPS5823326Y2 (en) * | 1980-03-21 | 1983-05-18 | 潔 石田 | scissors |
| JPS5760782Y2 (en) * | 1980-05-13 | 1982-12-24 | ||
| JPS6114974U (en) * | 1984-07-02 | 1986-01-28 | 喜一 吉元 | cutting scissors |
| US7966734B2 (en) * | 2004-07-28 | 2011-06-28 | Crain Cutter Company, Inc. | Tack strip cutter |
| US20060207101A1 (en) * | 2005-01-20 | 2006-09-21 | Fiskars Brands, Inc. | Utility cutter |
| CN211220792U (en) * | 2019-11-05 | 2020-08-11 | 陕西科技大学 | Single-blade model cutting nippers with replaceable blade |
-
2022
- 2022-06-14 JP JP2022095545A patent/JP7138288B1/en active Active
- 2022-07-28 JP JP2022120803A patent/JP2023182501A/en active Pending
- 2022-09-28 CN CN202211193712.0A patent/CN117260564A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JP2023182501A (en) | 2023-12-26 |
| JP7138288B1 (en) | 2022-09-16 |
| JP2023182126A (en) | 2023-12-26 |
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