KR910007748Y1 - Press dies for nails cutter - Google Patents

Abstract

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Description

Nail Clipper Body Mold Press Mold

1 is a perspective view of the upper side of the mold according to the present invention.

2 is a perspective view of the lower mold.

3 to 5 is an operation state of the upper and lower molds showing an embodiment of the present invention, Figure 3 is a cross-sectional state diagram of the upper and lower molds showing a state in which the upper mold is separated from each other before the operation, Figure 4 is an upper A cross-sectional state diagram of the upper and lower molds showing a state in which the mold is lowered and pressed by a secondary notching stripper to be parallel to the primary notching die. FIG. 5 shows the upper mold descending to a predetermined position while continuing to descend from the state of FIG. A cross-sectional state diagram of the upper and lower molds showing a state in which both the secondary stage process and the bending fixing have been completed.

Figure 6 is a punch and die plan view of the T-shaped separator of the present invention.

7 is a part of the end shaft scrap process according to the present invention.

8 is a perspective view of a completed nail clipper assembly of the nail clipper body-related parts formed by molding into a mold according to the present invention.

9 is a schematic position plan view of the lower die of a conventional disc bending separation mold.

10 is a scrap process diagram according to FIG.

* Explanation of symbols for main parts of the drawings

1: Upper die set 2: Punch packing plate

3: punch plate 4: stripper

5: 1st Notching Punch 6: Lower Die

7: die packing plate 8: lower die set

9: 1st notch hole 10, 16: preload spring

11: 2nd notching die 12: 2nd notching die plate

13: 2nd notching die position fixing plate 14: T scrap discharge hole

15: secondary notching stripper 17: secondary T-shaped notching punch

18: separation notching punch 19: bending punch up and down adjustment device

20: bending punch 21: bending stripper

22: preload plate 23: bending die

24: bending strip 25: separation notching scrap discharge hole

26: disc material 40: secondary punch packing plate

41: bending plate

The present invention relates to a press for molding a body for the first time in a nail clipper manufacturing process, and the nail clipper body until the heat treatment operation is performed by hooking one set of upper and lower molds on one power press to simultaneously perform the disc punching notching process and the bending process. In the mold molding of the notching process and the bending process, two separate molds, a plurality of presses, and a worker are required, different from the conventional method, the body-forming work is simplified by unifying the nails. In this regard, it is a remarkable case of creation that shows an example that productivity improvement by technology improvement is possible.

The nail clippers manufacturing process, which is generally known to date, is divided into six processes: body shaping mold work, heat treatment work, edge calculation work, surface treatment work, plating work, and assembly work, and here again, the body shaping work that is the core of the present invention is sub-classified. There are six operations of disc punching, hole punching, captioning, blade forging, cutting blade, and bending. Among these, five operations from disc bundle to cutting blade are called notching process for convenience and separated from bending work.

That is, the bending work to complete the nail clipper body by folding the center of the punching material out of the conventional mold as shown in FIG. 9 through the finished punching part 33 must be mobilized by using a separate production means. However, this conventional bending method has emerged as the first object of improvement for productivity in the field such as the semi-finished product collection and small transportation in manual work space. will be.

Another problem in the separation of the disc punching notching process and the bending process is that the primary semi-finished product of the disc punching process can be reduced only when the worker puts the correct hand into the bending die. It can be said that the harmful factors that hinder the relatively large bar, in parallel with the above-mentioned hand work, the burden of the clutch must be continuously operated by the foot, the machine noise in the factory and simple repetitive work within the limited working range The stress caused is to accumulate the tiredness of the worker and to focus on the critical quality control weakness in which a large number of defective products are generated.It is basically a combination of the original punching mold and the bending processing mold which were used separately separately. As a concept, it may occur when processing between both When explaining the structural operation example of the present invention made to prevent the deformation of the disc material by interposing a large number of intermediate pitches as follows. Prior to explaining the structure and operating state of the subject innovation, the same mold as the conventional subject, the same reference numerals as the subject innovation and will be described.

9 is a schematic plan view of the lower side die of the conventional disc bending separation mold, and 26 is supplied to the upper surface of the die along the direction of the arrow while being wound on a rotating drum (not shown) with a raw material disc.

Numeral 27 denotes a notch 27 'at one end of the scrap as shown in FIG. 10 for uniformly conveying the raw material plate 26 by a predetermined pitch P in the side notch portion. And the hole hole punching part 28. Is notch (27 '). Pilot ball 28 'on the plane of the scrap, such as the locking position of. To form a pilot pin (not shown) on the upper stripper. As it is inserted in, it is possible to check whether the disk transfer by the notch is made correctly.

The primary notch hole 9 discharges the notching scraps (not shown in the drawing) generated by the punching operation with the primary notching punch 5 to form the basic shape of the nail clipper body on the disc 26.

In addition, the blade forging part 29, the rivet hole punching part 30, the closed caption part 31, the blade cutting part 32, the finished punching part 33, etc. are arrange | positioned at predetermined position. The die and material disc 26 where the blade forging part 29 and the blade cutting part 32 correspond to the blades 34 and the rivet hole punching part corresponds to the lebapinol 35 (see FIG. 8). Each of the components in the structure and effect as described above is known in the industry, which means that the primary notching portion of the present invention (meaning parts from 1 to 10 in Fig. 3) Although not different from the structure, in the present invention, the groove notch for engraving the lever bar groove 36 is newly added, and it can be said that the completion point 33 is erased in the conventional configuration.

By the way, in the conventional disc bending separation mold as described above, as described above, the final process step is terminated in the flat body that has passed through the finished punching part 33, so that additional bending work is required.

In addition, another drawback of the conventional disc bending separation mold is that there is no device that can effectively adjust it in response to the change of the punch position, such as a captioning bias or a bending punch, which wastes a lot of time and effort in disassembly and assembly. This followed.

Referring to the structural operation of the present invention provided to solve this problem is as follows.

As shown in FIG. 3, in the upper and lower die sets 1 and 8, the primary notching process part is located on the right side and the secondary notching process part and bending part are located on the left side in the traveling direction (arrow direction) of the disc material. In the lower die of the upper die set 1, the punch packing plate 2, the punch plate 3, and the stripper 4 are sequentially connected to each other, so that the punch plate 3 and the stripper 4 are stripper stroke free. The distance l is combined in the middle, and a preload spring 10 is installed between the lower end of the punch plate 3 and the upper end of the stripper 4.

In addition, the secondary notching die position fixing plate 13 is installed at the lower left end of the upper die set 1 in order to connect the secondary notching die position fixing plate 13, the secondary notching die plate 12, and the secondary notching die 11 in turn. 12) is equal to the shared thickness of the punch packing plate 2 and the punch plate 3 on the opposite side, that is, the bottom of the secondary notching die positioning plate 13 and the bottom surface of the punch plate 3 coincide with each other. The thickness of the secondary notching die plate 12 coincides with the stripper stroke free distance (L) described above, and is approximately the bottom of the secondary notching die plate 12 while being horizontal with the bottom surface of the stripper 4. A bending plate in which the secondary notching die 11 having the day wave surface inclined upward toward the primary notching portion (ie, in the opposite direction to the arrow) from the center of the surface is in contact with the secondary notching die 11 on the right side. 41 are respectively combined on the left side In the structure, the T-scrap discharge hole 14 is installed so as to penetrate the outside from the lower horizontal surface of the secondary notching die 11 to the upper side, similarly separated notched scrap discharged in communication with one end of the upper die set (1) The bending plate 23 in which the ball 25 is formed is fixed to the bending die 23 in the vertical direction up to the upper die set 1, and about 8 mm to be in contact with the lower surface of the bending plate 41. In the state where the pressure plate 22 having the thickness of inside and outside is attached, the T-scrap discharge hole 14 has a tapered shape so as to widen from the rail portion 14 "toward the head portion 14 '. And the corner portion of the tail portion (14 ") consists of placing a corner gap 39 so as to be convex out.

On the other hand, the die packing plate 7 and the lower die 6 are disposed adjacent to the upper die on the right side (ie, the disc inlet side) of the lower die set 8 so as to be adjacent to each other in turn, and the lower die set ( In the upper left of 8), the secondary punch packing plate 40, the secondary punch plate 40, and the secondary notching stripper 15 are sequentially installed in connection with each other, so that the secondary notching stripper 15 and the secondary punch packing are installed. The upper surface of the secondary notching stripper 15 is adjusted slightly higher than the upper surface of the lower die 6 between the plates 40 via a suitable preload spring 16, and the left end of the secondary notching stripper 15 is adjusted. There is a plurality of bending punch up and down adjusting device 19 is configured at one end portion facing the outside of the secondary punch packing plate 40 in a structure in which the bending screener 21 is attached to allow the up and down flow.

Reference numeral 17 is a secondary T-type notching punch, 18 is a separate notching punch, 20 is a bending punch, and all of them are installed at opposite positions of the mating die on the upper side.

When described as an embodiment of the subject innovation made as a structure as described above as follows.

3 to 5 are views sequentially illustrating the operating state of the upper and lower molds according to an embodiment of the present invention.

3 shows the stationary state immediately before the upper mold is operated, and the lower mold is fixed to the power press (not shown).

4 shows the secondary notching stripper 15 which presses the secondary notching stripper 15 while the upper mold is operated downward, and initially sets the preload spring 16 to a position higher than the lower die 6. ) Is shown to be horizontal with the top surface of the lower die.

At this point, since the preload plate 22 protruding from the bottom of the bending plate 41 presses the bending stripper 21 firstly, the separation notching scrap 42 is first performed by the separation notching punch 18 before any other process. As shown in FIG. 7, the scrap 42 is pushed up and discharged through the separation notching scrap discharge hole 25. As a result, the separation strip 43 separated from the original plate is subsequently removed as a result of the notching of the scrap 42. The bending is started while being pressed by the bending die 23.

In other words, the notching scrap 42 is notched, the groove 44 as shown in FIG. When taking out the internal accessories (openers, knives, etc.) to provide a valuable space, and the bending work of the separation script 43 is not to say that the final step of the nail clipper body forming.

When the upper mold is further lowered in the operating state as shown in FIG. 4, the die is mounted on the upper portion while the primary notching portion (the process of right side of FIG. 3 or 9 to 32 of FIG. 9 conventionally) is performed. Secondary notching portion having a stripper attached to the lower portion and the lower notching portion 11 is lowered by the lowering of the secondary notching die 11 and the strip (material disc) is removed. From a horizontal state such as 4 degrees, it falls down as in FIG.

At this time, the process is a secondary notching process and a bending process, the secondary notching stripper 15 is about 9mm operation, but the bending operation is a work that can not be done at the same time as the secondary notching operation bar This problem is connected to the bending plate 41 It is solved by first lowering the bending stripper 21 so that the bending operation is prevented by the preload plate 22.

As a result, the working distance of the bending stripper 21 is approximately 17 mm.

When the upper mold is lowered to a predetermined position, the whole process is made. This disc material (strip) is not horizontal, so there may be a difference in pitch spacing. This minimizes the occurrence of errors and prevents the bending shape of the material. In order to achieve this, a part of the lower surface of the secondary notching die 11 is tapered, and the second notching punch ( 17, the corners formed so as to be convex outwardly in both corners of the tail portion 14 "of the T-shaped scrap discharge hole 14 are notched by the T-shaped scrap discharge hole 14 and pushed upward. Because of the gap (39) will not fall into the lower mold to continue to be pushed up as the work is repeated to be released to the outside.

When the upper mold finishes the one-time process and returns to its original position, the bending die 23 is naturally raised together with the bending stripper 21 to lift the nail clipper body from the bending punch 20. Attach the nail clipper body after the bending process with the extruded air coming out from the front of the protrusion 47 installed in the mold and the protrusion 47 installed in the lower mold, that is, the inlet hole (not shown) drilled on the discharge side. The present invention adopts a method of lifting and isolating from the mold body.

Ejecta device for opening the valve of the pota ball compressor and inducing the compressed air by operating the roller cam switch after the bending is completed is a general technical description will be omitted here.

The drawing code 19 is a bending punch height adjusting device, which can effectively adjust the height of the bending punch 20 by the front and rear operation of the tapered push rod 19 '.

Needless to say, this device can be operated not only in the bending punch but also in the same place wherever it is necessary, such as the above-mentioned subtitle engraving.

Claims (6)

Combination in which the primary notching part is the upper punch and the lower die, and the secondary notching part and the bending part are integrally formed with the above-mentioned primary and secondary notching parts and the bending part set in the arrangement relationship of the upper die and the lower punch. In the mold, the lower end surface of the secondary notching die 11, which is horizontal with the lower end surface of the bending plate 41, is tapered to have a portion from the center to the proximal end thereof upward, and the primary notching. On the bottom surface of the bending plate 41 which forms a step with the lower end surface of the stripper 4 and is in contact with the secondary notching die, the preload plate 22 protrudes outwards, and in the free state preload spring 16 A press mold for nail clipper body forming, characterized in that the phases of the secondary notching stripper 15 and the bending stripper 21 are set somewhat higher than the primary notching die 6. The method of claim 1, wherein the T-shaped scrap discharge hole 14 in the secondary notching die 11, the separation notching scrap discharge hole 25 in the bending plate 41, respectively, in the form of an upward hollow shape The press mold for nail clipper body forming, characterized in that the bending die 23 is installed to be in close communication with the discharge hole (25). The nail clipper body forming press die according to claim 1, wherein the bending stripper (21) is lowered by the preload plate (22) without operating simultaneously with the secondary notching stripper (15). The press mold for nail clipper body forming according to claim 2, wherein the T-shaped scrap discharge hole (14) has formed corner gaps (39) in both corners of the rail shaft (14 "). The press mold for nail clipper forming of the nail clipper according to claim 1, wherein projections (47) and (47 ') in which the inlet holes are drilled are provided in front of the upper side bending die (23) and the lower side bending punch (20). Press nail for forming the nail clipper body according to claim 5, characterized in that the bending punch (20) is height-adjustable by the punch up / down adjusting device (19).