JP4446800B2 - Trim type - Google Patents

Description

  The present invention relates to a trim mold that efficiently cuts and removes scrap in trim processing.

  When trimming a molded board such as a draw panel for automobiles, it is difficult to handle the window frame-shaped (or frame-shaped) scrap material generated after cutting the entire circumference and extracting the product. Therefore, it is collected by cutting and dividing with a scrap cutter.

6A is a sectional view showing an outline of a conventional trim mold, FIG. 6B is a partial side view of the trim mold, FIG. 7A is a plan view of a plate (work), and FIG. is there.

  The trim mold includes a fixed mold (lower mold) 1 and a movable mold 2 (upper mold). The fixed mold 1 includes a pedestal 3 and a scrap cutter 4 provided around the pedestal 3. The movable mold 2 includes a block 6 and a pad 8 supported on the inside of the block via a spring 7, and an upper blade 9 is provided on the inner periphery of the lower end of the block 6.

  The formed plate material, for example, the draw panel W is placed on the pedestal 3, and is fixed between the pad 8 and the pedestal 3 by the elastic force of the spring 7 when the block 6 is lowered. When the block 6 is further lowered, the draw panel W is cut by the upper blade 9 and the lower blade 5 to perform trim processing.

  As the prior art, Patent Documents 1 to 3 are cited. Patent Document 1 describes a trim mold that can perform a large hole punching process and scrap cutting like a window of a door panel of an automobile in one step. This is because a concave part is formed on the scrap cutting blade on the lower mold side, and a convex part is formed on the scrap cutting blade on the upper mold side, and the convex part is engaged with the work ahead of the general part. Hole punching and scrap cutting are performed substantially simultaneously while deforming the irregularities.

Patent Document 2 describes a trim mold for the purpose of preventing the generation of chips by preventing double cutting on a scrap cutting line when scrap is cut into a plurality of scrap pieces with a scrap cutter. ing. Further, in Patent Document 3, in order to prevent the strength of a die holder having a horizontally long end material hole from being lowered, a scrap cutter 9 that combines a support beam and a cutter may be provided at the center of the end material hole. Are listed.
JP-A-5-245548 JP 2002-66649 A Japanese Patent Laid-Open No. 2003-212242

  The technique disclosed in Patent Document 1 is not applicable to the processing of a window frame-like scrap material because the outer shape of the scrap material is reduced in size by deforming the scrap material so that the scrap material is easily extracted from the trimmed window portion.

  In addition, none of the patent documents can effectively prevent the jumping accompanying the deformation of the scrap material. That is, as shown in FIG. 7A, when the draw panel W is cut along the trimming line 10, a window frame-shaped scrap material 11 is generated. The first scrap material 11 is left on the scrap cutter 4, and the next draw panel W is trimmed in the same manner, and the generated next scrap material 11 a is stacked on the previous scrap material 11. The scrap material 11 is pressed against the waiting scrap cutter 4 by the block 6 and the scrap material 11a that have been lowered and cut.

  The problem in cutting the scrap material 11 is that the scrap material 11 a sandwiched between the block 6 and the scrap material 11 is deformed when the lower scrap material 11 is cut and jumps up on the scrap cutter 4.

  This problem will be described in more detail. 8 to 10 are views showing a state of trim processing of a conventional trim mold, in which (a) is a partial front view and (b) is a partial side view. When trim processing is started, the block 6 is lowered as shown in FIG. Here, the scrap material 11 generated previously is left on the scrap cutter 4. Then, as shown in FIG. 9, the lower blade 5 and the upper blade 9 mesh with each other when the block 6 is lowered, so that the scrap material 11 a is cut off from the draw panel W, and then the lower scrap material 11 is cut by the scrap cutter 4. .

  At this time, as shown in FIG. 9, the scrap material 11 a is also deformed as the scrap material 11 is cut. Then, as shown in FIG. 10, when the block 6 is lifted to release the draw panel W, the window frame-shaped scrap material 11a whose inner peripheral diameter is reduced by deformation jumps up on the lower blade 5, and is further trimmed. Contact with the subsequent draw panel W, the next processing is cut into two sheets. Therefore, it is necessary to manually remove the deformed scrap material 11a, and workability is poor. Further, the mold may be damaged by the scrap material 11a being bitten.

  In the present invention, the window frame-like scrap material generated by trim processing is prevented from being deformed before being cut by a scrap cutter, thereby eliminating the trouble of manual scrap material removing work at the time of mold release and jumping up. An object of the present invention is to provide a trim die that can prevent the press die from being damaged by scrap materials.

In order to solve the above problems, the trim mold according to the present invention is capable of moving up and down a block having an upper blade relative to a pedestal having a lower blade, a scrap cutter is provided around the pedestal, and a lower surface of the block And it was set as the structure which provided the convex part in the location facing the said scrap cutter.
In addition, it is preferable that the height of the convex portion is formed so that trim processing and scrap cutting can be performed substantially simultaneously.

  In the trim mold of the present invention, the portion facing the scrap cutter of the upper blade push-off block has a convex shape, so that the scrap material is initially deformed into a concave shape by being pushed by this convex portion, and then pressed against the scrap cutter to be convex. After being deformed into a shape, it is released by mold release. That is, the scrap material can keep the shape close to a flat surface after opening by following the course of the concave shape and the convex shape, so that it does not jump up and is not covered between the upper and lower blades.

  Moreover, the efficiency of work increases by making the height of the convex portion high enough to perform trim processing and scrap cutting substantially simultaneously.

  Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1A is a front view of a trim mold according to the present invention, FIG. 1B is an enlarged side view seen from the direction A, and FIGS. 2A and 2B are views for explaining the operation of a convex portion. In addition, since the whole structure of a trim type | mold is the same as that of a conventional structure, the same number is attached | subjected about the same member and description is abbreviate | omitted.

  In the trim mold of the present invention, a convex portion 12 is provided at a portion of the block 6 facing the scrap cutter 4. The convex portion 12 has a length that can cover the entire blade span of the scrap cutter 4 and has a substantially trapezoidal cross section.

  The height (h) of the convex portion 12 is preferably set to a height at which trimming and scrap cutting can be performed substantially simultaneously. The actual height varies depending on the individual press die, but is preferably around 3 mm. If it is this height, the plastic deformation of the scrap material 11a when the block 6 which formed the convex part 12 pushed in the scrap material 11a will be easy to be eased (that is, an elastic recovery force will work easily). Further, the width t of the convex portion 12 is preferably about 10 mm, for example, considering the strength and the guarantee of the dent due to wear. Further, it is preferable to provide a round r having a radius of 3 mm, for example, on the side surface of the convex portion 11 in terms of ensuring the strength. However, the shape and size of the convex portion 11 described so far are only examples, and may have any shape and size as long as the effects of the present invention can be achieved. .

  As shown in FIG. 2A, the scrap material 11a is pushed into the convex portion 12 and deforms so as to warp upward at the beginning. Then, after the scrap material (not shown) is cut and dropped, the scrap material is sandwiched between the scrap cutter 4 and the convex portion 12, and this time, as shown in FIG. To form a bend. By bending in the opposite direction in advance, the total amount of plastic deformation is reduced. For this reason, even when the convex part 12 separates with the rising of the upper blade pressing block 7 at the time of mold release, the scrap material 11a does not cause the springing generated in the conventional trim mold.

  Next, based on FIGS. 3-5, the manufacturing procedure of the draw panel using the trim type | mold of this invention is demonstrated. Here, in each figure, (a) is a front view of the main part of the trim mold, and (b) is a side view of the main part.

  First, FIG. 3 shows a state immediately before the start of trim processing. The draw panel W is placed on the base 3 provided in the lower mold, and a product part is fixed by the pad 8 that descends. Next, the block 6 descends, and the tip of the convex portion 12 comes into contact with the surface of the portion that becomes the scrap material 11a. Note that the scrap material 11 left by the previous trimming remains on the scrap cutter 4.

  Next, as shown in FIG. 4, the block 6 is further lowered, and the lower blade 5 provided at the corner of the pedestal 3 and the upper blade 9 provided at the corner of the block 6 are engaged to cut the draw panel W. Trimming is performed. Further, at the time of this trim processing, since the tip portion of the convex portion 12 is pushed into the scrap material 11a at substantially the same time, this portion is deformed into a concave shape as shown in FIG. 2 (b).

  Next, as shown in FIG. 5, trimming and scrap cutting are performed substantially simultaneously. That is, the scrap material 11 a cut by the trim processing is pushed down by the convex portion 12 and presses the scrap material 11 left on the scrap cutter 4. As a result, the scrap material 11 is pushed down by the scrap cutter 4 and dropped, while the scrap material 11a is slightly deformed into a convex shape as shown in FIG.

  When the trim processing and the scrap material 9 are cut and collected as described above, the upper die 2 starts to rise. Then, both the product fixed by the pad 8 and the scrap material 11a suppressed by the convex portion 12 are released. As described above, since the scrap material 11a is opened via the concave deformation and the convex deformation, it can maintain a shape close to a substantially flat surface. Therefore, it does not jump up and cover the product as in the conventional case, and is not caught between the upper and lower blades of the trim mold.

  Finally, the amount of meshing when trimming and scrap cutting are performed simultaneously will be described. If the height (h) of the convex portion 12 is 3 mm and the meshing amount when the draw panel W is cut by the upper blade 9 and the lower blade 5 is 2 mm, a sufficient meshing of 5 mm in total for cutting the scrap material 11a. The amount can be secured. Therefore, the concave deformation and the convex deformation of the scrap material 11a can be performed with a margin.

  The trim mold of the present invention can efficiently cut a plate material in which a window frame-like scrap material is generated. Therefore, it can be suitably used for trimming relatively large plate processed products such as automobile bodies and home appliances.

(A) is the front view of the principal part of the trim type | mold which concerns on this invention, (b) is the enlarged side view seen from A direction (A) And (b) is the figure explaining the effect | action of a convex part. (A) is a front view of the main part of the trim mold, (b) is a side view of the main part. (A) is a front view of the main part of the trim mold, (b) is a side view of the main part. (A) is a front view of the main part of the trim mold, (b) is a side view of the main part. (A) is sectional drawing which shows the outline | summary of the conventional trim type | mold, (b) is a partial side view of the same trim type | mold. (A) is a plan view of the plate material, (b) is a side view (A) is a partial front view of a conventional trim mold, and (b) is a partial side view. (A) is a partial front view of a conventional trim mold, and (b) is a partial side view. (A) is a partial front view of a conventional trim mold, and (b) is a partial side view.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Fixed type (lower type), 2 ... Movable type 2 (upper type), 3 ... Base, 4 ... Scrap cutter, 5 ... Lower blade, 6 ... Block, 7 ... Spring, 8 ... Pad, 9 ... Upper blade, DESCRIPTION OF SYMBOLS 10 ... Trimming line 11, 11a ... Scrap material, 12 ... Convex part, h ... Convex part height, t ... Convex part width, W ... Draw panel.

Claims (2)

A trim mold for cutting a product from a plate material along a trim line. This trim mold allows a block with an upper blade to move up and down relative to a pedestal with a lower blade, and the scrap located below around the pedestal. A trim die is provided, wherein a scrap cutter for cutting through the scrap located above is provided, and a convex portion is provided at a location facing the scrap cutter on the lower surface of the block. The trim processing press die according to claim 1, wherein the height of the convex portion is set to a height at which trim processing and scrap cutting can be performed substantially simultaneously.