JP2002008530A - Trimming method and trimming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a trimming method that enables to perform the work effectively and can be applied to each model and each size of the product and a device for implementing the same. SOLUTION: Each of the trimming line portion 115, 115A which is in the direction crossing the metal work 110 in a longitudinal direction is clamped at the product portion 111 and at the outside 112 of the product along the trimming line of the product, respectively, by separate clamp section, and the clamp section 121 which clamps the outside of the product of each trimming line portion and the clamp section 122 which clamps the product portion are moved relatively along the product face in the horizontal direction so as to be separated each other. By so doing, the trimming line portions which clamp the product in the direction crossing the metal work in longitudinal direction are torn off, and the product portion and the disused portion are separated at the trimming line portions.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for trimming a product such as a shadow mask, and more particularly, to a method for trimming a product such as a shadow mask, a half-etched portion and a through-hole portion all around the shadow mask. The present invention relates to a trimming apparatus and method for separating a shadow mask from a single metal sheet provided with a trimming line portion for integrally connecting a shadow mask and an unnecessary portion.

[0002]

2. Description of the Related Art In recent years, mass production of a shadow mask for a color TV (cathode ray tube) has been progressing with an increase in the amount of use thereof, and depending on the purpose of use, it has been demanded to be finer and larger. Such a shadow mask is generally made of a metal plate 600 that is continuous in a strip shape (see FIG. 6).
(A)), which is produced in an integrated line, and is simply made into a hoop shape and continuously formed in a strip shape.
While making 0 continuously or intermittently, plate making and etching are performed so that the outer peripheral portion of a product portion (referred to as a shadow mask) 611 of each shadow mask is held by the metal plate material 600, and The outer shape processing is performed with the shadow mask 611 imposed on 600.
(FIG. 6 (b)) Then, as shown in FIG. 6 (c), the metal plate material 600 is once cut, and each shadow mask 611 is separated from the cut metal sheet 610 (FIG. 6 (d)). ) A trimming method (off-line method) is generally adopted. Metal sheet 610 cut from metal plate material 600
Is the shadow mask 1 as shown in FIGS.
6 (c) and (b) as shown in FIGS. 6 (c) and (b). This is a state in which one sheet is formed. As the trimming method, an outer peripheral line (also referred to as a trimming line) of a shadow mask including a half-etched portion and / or a through-hole portion is provided in advance on the outer periphery of the shadow mask by etching, and the outer peripheral line of the shadow mask (also referred to as a trimming line) is provided. The first method of holding down the product portion of the shadow mask and lifting the unnecessary metal plate portion 612 and separating the metal plate portion 612 from the product portion by using a holding mold suitable for the above-mentioned method, or an apparatus that is not a manual device but an unnecessary device. The second method of bending the metal plate portion 612 up and down and the like have been adopted.

[0003] However, these methods require holding dies for each kind. In particular, in the second method using an apparatus,
There was a problem that the cost of the mold was high and that the changeover took time. There is also a problem that trimming takes time and is not efficient. To increase efficiency,
A trimming method has also been adopted in which dozens of shadow masks are stacked, unnecessary portions are swung, and an outer peripheral line (trimming line) of the shadow mask is broken by fatigue to separate products from unnecessary portions. According to this method, since the outer peripheral line (trimming line) of the shadow mask is broken by fatigue, a crack is generated in the cut portion, and iron powder and the like are easily generated. If this enters the perforated portion of the shadow mask, foreign matter defects occur. In addition, in the case of this method, the structure of the device becomes extremely complicated and expensive, which is not practical.

[0004]

As described above, in the trimming of the shadow mask, the apparatus can be efficiently performed, and the apparatus does not need to be replaced with the holding mold for each kind or size of the shadow mask. There was a need for something that would not be extremely complicated and that would be reliable in terms of quality. Further, an in-line trimming method for separating the shadow masks 611 from the metal plate 600 continuous in a band shape as shown in FIG. 6B has been required from the viewpoint of productivity and management. According to the present invention, in such a situation, a metal plate 600 continuous in a belt shape as shown in FIG.
Is a trimming method (in-line method) for separating each shadow mask 611 from the apparatus, the apparatus is not extremely complicated, the quality is reliable, the operation can be performed efficiently, and the variety of the shadow mask An object of the present invention is to provide a trimming method that does not need to replace a pressing die for each size and that is compatible with in-line, and an apparatus for performing the method.

[0005]

According to the present invention, there is provided a trimming method comprising the steps of: etching a strip-shaped continuous metal sheet;
A metal work that is formed in a strip-like shape and has a half-etched portion and a through-hole portion in the entire periphery of the product, and a trimming line portion that integrally connects the product and the unnecessary portion in the half-etched portion. And, the product is a substantially quadrangular shape having a longitudinal direction of the metal work and a side substantially orthogonal to the longitudinal direction of the metal work, and a portion of the trimming line portion along the longitudinal direction of the metal work includes only a through-hole portion. A method of separating the metal work, in the form of a hoop, in the middle of being transported in a predetermined transport direction, temporarily stopped, or while being transported in a predetermined transport direction, the longitudinal direction of the metal workpiece The two trimming line portions sandwiching the product in the direction perpendicular to the front and back are separated by one side each side, and each trimming line portion in the direction perpendicular to the longitudinal direction of the metal work is Along the trimming line portion, respectively,
The product part and the outside of the product are grasped by another clamp part, and the clamp part that grasps the outside of the product of each trimming line part,
By moving the clamp part holding the product part along the product surface, horizontally, and relatively apart from each other, tearing the trimming line part sandwiching the product in the direction perpendicular to the longitudinal direction of the metal work, The product part and the unnecessary part are separated by a trimming line part. In the above, the product part is a shadow mask, and the relative movement distance between the clamp part holding the outside of the product and the clamp part holding the product part is defined as The gap between the notch provided on the side along the longitudinal direction of the metal work and the unnecessary portion is set to be equal to or less than the gap between the notch. Here, the hoop shape means a state in which a metal work continuous in a belt shape is stretched without loosening.

The trimming device of the present invention comprises a product formed by etching a continuous metal sheet in a strip shape, a half-etched portion and a through-hole portion all around the product, and the half-etched portion does not need the product. A metal work continuous in a strip shape, and a product having a substantially quadrangular shape having a longitudinal direction of the metal work and a side substantially orthogonal to the metal work. The portion along the longitudinal direction of the metal work of the part is a trimming device that separates the product from the metal work, which consists only of the through-hole portion, and the metal work is in a hoop shape,
In the state of being temporarily stopped during the transfer in the predetermined transfer direction, the two trimming line portions sandwiching the product in the direction perpendicular to the longitudinal direction of the metal work are separated back and forth by one side at a time. Along with each trimming line in the direction perpendicular to the direction, a product section and a clamp section for grasping the outside of the product are separately provided, and a clamp section for grasping the outside of the product of each trimming line section and a product section are provided. The grasped clamp portion is characterized in that it can be relatively moved along the product surface in the horizontal direction and away from each other. Alternatively, the trimming device of the present invention
A metal sheet continuous in a strip shape is etched, and a product and a trimming line portion which is composed of a half-etched portion and a through-hole portion in the entire periphery of the product, and integrally connects the product and unnecessary portions in the half-etched portion. Is a metal work continuous in a strip shape, and the product is a substantially rectangular shape having a side substantially orthogonal to the longitudinal direction of the metal work, and a portion of the trimming line portion along the longitudinal direction of the metal work. Is a trimming device for separating a product from a metal work, which is formed only of a through-hole portion, wherein the metal work is formed in a hoop shape, and is conveyed in a predetermined conveyance direction, while being perpendicular to the longitudinal direction of the metal work. The two trimming line portions sandwiching the product are separated back and forth by one side at a time, and along each trimming line portion in the direction orthogonal to the longitudinal direction of the metal work, The product part, a clamp part that grabs the outside of the product and moves in synchronization with the conveyance is provided separately.The clamp part that grabs the product outside of each trimming line part and the clamp part that grabs the product part are further , Which can be relatively moved along the product surface and horizontally away from each other. In the above, the product part is a shadow mask.

[0007]

According to the trimming method of the present invention, a metal sheet continuous in a strip shape is etched by such a structure, and the trimming method comprises a half-etched portion and a through-hole portion all around the product. A metal work that is continuous in a strip shape and has a trimming line portion that integrally connects a product and an unnecessary portion in a half-etched portion, and the product has two sides that are substantially orthogonal to the longitudinal direction of the metal work. It is a substantially square shape, and the portion along the longitudinal direction of the metal work of the trimming line portion is only a through hole portion. This is a trimming method for separating the product from the metal work, the apparatus is not extremely complicated, This makes it possible to provide a trimming method which is reliable in terms of efficiency, can perform the work efficiently, and can cope with various kinds or sizes of products. Specifically, as shown in FIG.
A trimming method (in-line method) for separating each shadow mask 611 from 00, the apparatus is not extremely complicated, the quality is reliable, the operation can be performed efficiently, and the variety of the shadow mask is In addition, it is possible to provide an in-line compatible trimming method that does not require changing the pressing die for each size. In the manufacture of shadow masks, the in-line separation method has become possible at a practical level. Specifically, while the metal workpiece is in the form of a hoop and is being transported in a predetermined transport direction, while being temporarily stopped, or while being transported in a predetermined transport direction,
2 sandwiching the product in the direction perpendicular to the longitudinal direction of the metal work
One trimming line part is separated back and forth by one side, and each trimming line part in the direction perpendicular to the longitudinal direction of the metal work is along the trimming line part, and the product part and the outside of the product are separated by another. By moving the clamp part holding the product part of each trimming line part and the clamp part holding the product part in the horizontal direction along the product surface and horizontally away from each other ,
This is achieved by tearing a trimming line portion sandwiching the product in a direction perpendicular to the longitudinal direction of the metal work, and separating the product portion from the unnecessary portion at the trimming line portion. This is effective when the product part is an etched shadow mask.Especially, the moving distance of the clamp part holding the outside of the product is provided on the side along the longitudinal direction of the metal work around the product. The gap between the notch and the unnecessary portion is set to be equal to or less than the gap between the notch and the unnecessary portion, thereby preventing occurrence of a defect due to collision of the notch.

In the trimming method of the present invention, unlike the method in which the outer peripheral line (trimming line) of the shadow mask is fatigue-ruptured, iron powder hardly occurs during trimming. In the case of the present invention, the hoop conveyance accuracy is not affected by merely grasping the outside of the trimming line portion and not moving relatively, but pulling only the product portion to separate the product from the unnecessary portion. Further, since the breaking force can be reduced, it is possible to perform trimming without slippage between the product and the clamp with a gripping force that does not cause indentation.

Incidentally, in order to facilitate the tear separation, an impact load may be applied to the tear separation portion using a vibration member such as an air vibrator, or an ultrasonic vibration may be applied using a vibrator or the like.

[0010] The trimming apparatus of the present invention, having such a structure, comprises a product formed by etching a continuous metal sheet in a strip shape, a half-etched portion and a through-hole portion all around the product. , The trimming line part that integrally connects the product and the unnecessary part with the half etching part,
A metal work that is continuous in a strip shape and the product has a substantially rectangular shape having two sides substantially perpendicular to the longitudinal direction of the metal work, and a portion along the longitudinal direction of the metal work of the trimming line portion is a through hole. This is a trimming device that separates the product from the metal work consisting only of parts. The device does not become extremely complicated, the quality is reliable, and the work can be performed efficiently. In addition, it is possible to provide a trimming device that can correspond to each size. Specifically, in the production of shadow masks, it is possible to provide a practical level of in-line separation method, and it is possible to provide a trimming device that does not require a holding die for each product type, unlike conventional trimming on sheets (sheets). And

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for trimming a shadow mask according to the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram showing one embodiment of a trimming method according to the present invention, FIG. 2 is a schematic configuration diagram of a first embodiment of a trimming device according to the present invention, and FIG. FIG. 4 is a schematic configuration diagram of a second example of the embodiment of the trimming device, and FIG. 4 is a diagram for explaining a trimming line portion. FIG.
(B) and FIG. 4 (c) are D1-D of FIG. 4 (a), respectively.
It is sectional drawing in 2, D3-D4. 1 to 3 indicate the direction of movement (direction of force) of the clamp portion during trimming, and the thin line arrow indicates the transport direction. 1 to 4, 110 is a metal sheet, 1
11 is a product (shadow mask), 112 is an unnecessary part, 11
5, 115A are trimming line portions, 116 is an intermittent half portion, 117 is a through hole portion, 121, 122, 123, 12
4 is a clamp portion, 190 is a material portion (steel material), 191 is a half portion, 192 is a penetrating portion, 211, 212, 221, 2
22 is a g clamp part, 211U, 212U, 221U,
222U is an upper clamp part, 211D, 212D, 221
D and 222D are lower clamp parts, 230 is a belt conveyor, 231 is a rotating roll, 232 is a belt, 240 is a belt conveyor, 241 is a rotating roll, 242 is a belt,
250, 255, 257 are positioning rolls (guide rolls); 310, 320 are trimming units, 311;
312, 321, and 322 are clamping parts, 311U, and 31
2U, 321U, 322U are upper clamp parts, 311D,
312D, 321D and 322D are lower clamp parts, 330
Is a belt conveyor, 331 is a rotating roll, 332 is a belt, 340 is a belt conveyor, 341 is a rotating roll,
42 is a belt, 350 and 357 are positioning rolls (guide rolls).

First, an example of an embodiment of a trimming method according to the present invention will be described. In this example, a metal sheet (corresponding to 600 in FIG. 5A) continuous in a strip shape is etched to form a substantially square shadow mask as a product 111, a half-etched portion and a through hole in the entire periphery of the product. A trimming method for separating a shadow mask (product) 111 from a strip-shaped continuous metal work 110 provided with a trimming line portion 115 for integrally connecting the product 111 and the unnecessary portion 112 in a half-etched portion. It is. In addition, the outer periphery of the shadow mask (hereinafter, also simply referred to as a side) has a longitudinal direction of the metal work 110 and a side substantially orthogonal thereto, and a portion of the trimming line portion 115 along the longitudinal direction of the metal work 120 is It consists only of a through hole. This example will be described briefly with reference to FIG. First, the metal workpiece 110 is formed in a hoop shape, while being transported in a predetermined transport direction, in a temporarily stopped state, or while being transported in a predetermined transport direction, in a direction orthogonal to the longitudinal direction of the metal workpiece 110, Of the two trimming line portions 115A sandwiching the product, they are gripped by the clamp portions 121 and 122 along the trimming line portion on the rear side in the transport direction. Then, in this state, by moving the clamp part 122 holding the product part against the clamp 121 holding the outside of the product 111 along the product surface in the horizontal direction so as to separate from the metal part, Of the trimming line portions 115A sandwiching the product in a direction orthogonal to the longitudinal direction of the workpiece 110,
Torn the rear trimming line in the transport direction. (Figure 1
(A)) Then, the clamp portions 121 and 12
After releasing 2, the metal work 110 is made into a hoop shape,
While the product is being conveyed in the predetermined conveyance direction, while the product is temporarily stopped, or while being conveyed in the predetermined conveyance direction, the product is sandwiched in the direction orthogonal to the longitudinal direction of the metal workpiece 110.
Of the one trimming line portion 115A, along the trimming line portion on the front side in the transport direction, it is gripped by the clamp portions 123 and 124, and in this state, the clamp portion 123 that grips the outside of the product 111 and the clamp portion 123 that grips the product portion To
By moving horizontally and away along the product surface, the trimming line portion 115A sandwiching the product in the direction orthogonal to the longitudinal direction of the metal workpiece 110 is torn at the front side in the transport direction. (FIG. 1B) Since the portion of the trimming line portion 115 along the longitudinal direction of the metal work 120 is formed only of the through-hole portion, the product is sandwiched in the direction orthogonal to the longitudinal direction of the metal work 110 in this manner. The two trimming line portions 115A (trimming line portions on the front and rear sides in the transport direction) are torn,
The product part 111 is separated from the metal work 110. still,
The clamp parts 121 to 124 are provided with trimming line parts 115A.
The metal work 110 is sandwiched and gripped from both sides thereof.

In this embodiment, the clamp portions 121, 122, 123, 1 are set at a speed corresponding to the transport speed (including the case of 0).
24, while holding this state, and further sandwiching the trimming line portions in each of the trimming line portions 115A sandwiching the product in the direction orthogonal to the longitudinal direction of the metal work 110 as described above. By moving the clamp parts away from each other, the trimming line part 115A sandwiching the product in the direction perpendicular to the longitudinal direction of the metal work 110 is torn. In some cases, the movement to separate the clamp portions sandwiching each trimming line portion from each other is different from the present example shown in FIG. 1, and the clamp portion (1 in FIG.
21 or 124), or both a clamp portion (corresponding to 122 and 123 in FIG. 1) for holding the product portion and a clamp portion (corresponding to 121 and 124 in FIG. 1) for holding an unnecessary portion outside the product. You may move it.

Here, the metal work 110 shown in FIG.
The trimming line portion 115 will be further described with reference to FIG. FIG. 4A is a diagram showing a peripheral area of one product (shadow mass) 111 of the metal work 110, and FIG. 4B is a cross-sectional view taken along line D1-D2 of FIG. (C) is a cross-sectional view of the intermittent half part 116 in the half-etched part of D3-D4.
When the trimming method shown in FIG. 1 is performed, FIG.
(A) As shown in FIG.
The trimming line along the longitudinal direction of 0 is a through hole. By doing so, the two trimming line portions 115A (the trimming line portions on the front and rear sides in the transport direction) sandwiching the product in the direction orthogonal to the longitudinal direction of the metal work 110 are torn, so that the product portion 111 Is separated from the metal work 110 over the entire circumference.

Next, an embodiment of the trimming apparatus of the present invention will be described. First, a first embodiment of the trimming device according to the present invention will be described with reference to FIG.
The trimming apparatus of the first example is configured by etching a metal sheet that is continuous in a strip shape, and includes a shadow mask as a product 111, a half-etched portion and a through-hole portion all around the product, and a half-etched portion is formed. A trimming line portion 115 for integrally connecting the product and the unnecessary portion is provided with a strip-shaped continuous metal work 110, and a trimming device for separating a shadow mask as a product. This is a device that separates the shadow mask, which is the product 111, from the metal work 110 in a state of being temporarily stopped (transport speed 0) during the transport in the transport direction of (1). The trimming operation is performed as in the trimming method shown in FIG. 1, and a description thereof will be omitted. The clamp portions 221 and 222 are provided in the conveying direction of two trimming line portions (corresponding to 115A in FIG. 1) of the product portion (shadow mask) 111 which sandwich the product in the direction orthogonal to the longitudinal direction of the metal work 110. Clamp portions 211 and 212 are provided along the rear trimming line portion. The clamp portions 211 and 212 include two trimming line portions sandwiching the product in a direction orthogonal to the longitudinal direction of the metal work 110 of the product portion (shadow mask) 111 to be trimmed (see FIG. 1 (equivalent to 115A)
The clamps are provided along the trimming line on the front side in the transport direction, and each of the clamps is fixed so as to be able to move in position for tearing. Clamp section 211, 2
12, 221 and 222 are the upper clamp portions 21 respectively.
1U, lower clamp part 211D, upper clamp part 212U,
The metal work is grasped by the lower clamp part 212D, the upper clamp part 221U, the lower clamp part 221D, the upper clamp part 222U, and the lower clamp part 222D. The operation of each clamp unit can be performed by an air cylinder or the like.
The belt conveyor 230 is provided below the metal work 110, receives the shadow mask that is the product 111 separated from the metal work 110, and transports the same to the belt conveyor 240. Positioning roll (guide roll) 25
Numerals 0 and 255 are for determining the horizontal position of the metal work and forming a storage for retaining the metal work 110 between the two rolls. The roll 257 is a turn roll for transporting the unnecessary portion 112 continuous in a belt shape in a predetermined direction.

Next, a second embodiment of the trimming apparatus according to the present invention will be described with reference to FIG. The trimming apparatus of the second example is configured by etching a metal sheet that is continuous in a strip shape, and includes a shadow mask that is a product 111, a half-etched portion and a through-hole portion all around the product, and a half-etched portion. A trimming line portion 115 for integrally connecting a product and an unnecessary portion is provided with a metal work 110 continuous in a strip shape, and a trimming device for separating a shadow mask, which is a product, using a metal work 110.
Is a device for separating the shadow mask, which is the product 111, from the metal workpiece 110 while transporting the product in a hoop shape in a predetermined transport direction. The trimming operation is performed as in the trimming method shown in FIG. 1, and a description thereof will be omitted.
The trimming units 310 and 320 are units that can move in accordance with the transport speed (at the same speed as the transport speed), and the clamp units 311 and 312 are fixed to the trimming unit 310, and the clamp units 321 and 322 are connected to the trimming unit 320. Fixed. W1, W2
Is the moving range of the trimming units 310 and 320 in the transport direction, respectively. Clamp parts 311, 312, 3
Reference numerals 21 and 322 denote an upper clamp portion 311U, a lower clamp portion 311D, an upper clamp portion 312U, a lower clamp portion 312D, an upper clamp portion 321U, and a lower clamp portion 3, respectively.
21D, upper clamp part 322U, lower clamp part 322D
Thus, the metal work is sandwiched from both sides thereof. The clamp portions 321 and 322 are provided in the transport direction of two trimming line portions (corresponding to 115A in FIG. 1) between the products in the direction orthogonal to the longitudinal direction of the metal workpiece 110 of the product portion (shadow mask) 111 to be trimmed. Provided along the rear trimming line portion, the clamp portions 311, 3
12 is a product part (shadow mask) 11 to be trimmed
Of the two trimming lines (corresponding to 115A in FIG. 1) sandwiching the product in the direction perpendicular to the longitudinal direction of one metal work 110, the trimming line is provided along the front trimming line in the transport direction. , Respectively, are fixed so that the position can be moved for tearing. The operation of each clamp unit can be performed by an air cylinder or the like. In addition, the clamps 312 and 321 can be moved in position for tearing apart from the movement of the trimming unit. As in the first example, the belt conveyor 330 is provided below the metal work 110, receives the shadow mask that is the product 111 separated from the metal work 110, and transports it to the belt conveyor 340. The positioning roll (guide roll) 350 is for determining the horizontal position of the metal work. The roll 357 is a turn roll for transporting the unnecessary portion 112 continuous in a belt shape in a predetermined direction.

[0017]

As described above, according to the present invention, a strip-shaped mask having a shadow mask as a product and a trimming line portion for integrally connecting the shadow mask and an unnecessary portion is provided on the entire periphery of the shadow mask. A trimming method that separates the shadow mask from the continuous metal work, which is reliable in terms of quality, can perform the work efficiently, and is compatible with each type or size of the shadow mask. It became possible to provide a device for carrying out.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an example of an embodiment of a trimming method according to the present invention.

FIG. 2 is a schematic configuration diagram of a first example of an embodiment of a trimming device of the present invention.

FIG. 3 is a schematic configuration diagram of a second example of the embodiment of the trimming device of the present invention.

FIG. 4 is a diagram for explaining a trimming line portion;

FIG. 5 is a view for explaining a manufacturing method and separation of a shadow mask;

[Explanation of symbols]

110 Metal sheet 111 Product (shadow mask) 112 Unnecessary part 115, 115A Trimming line part 116 Intermittent half part 117 Through hole part 121, 122, 123, 124 Clamp part 190 Material part (steel material) 191 Half part 192 Penetrating part 211, 212, 221, 222 G clamp part 211U, 212U, 221U, 222U Upper clamp part 211D, 212D, 221D, 222D Lower clamp part 230 Belt conveyor 231 Rotary roll 232 Belt 240 Belt conveyor 241 Rotary roll 242 Belt 250, 255, 257 Positioning roll (guide) Roll) 310, 320 Trimming unit 311, 312, 321, 322 Clamp unit 311U, 312U, 321U, 322U Upper clamp unit 311D, 312D, 321D, 322D Lower clamp part 330 Belt conveyor 331 Rotating roll 332 Belt 340 Belt conveyor 341 Rotating roll 342 Belt 350, 357 Positioning roll (guide roll)

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Toshitake Watanabe 1-1-1 Ichigaya-Kagacho, Shinjuku-ku, Tokyo F-term in Dai Nippon Printing Co., Ltd. 5C027 HH14

Claims (6)

[Claims] 1. A strip-shaped continuous metal sheet is etched to form a product, a half-etched portion and a through-hole portion all around the product, and the product and an unnecessary portion are integrally connected at the half-etched portion. And the trimming line
A metal work continuous in a strip shape provided, and the product has a substantially rectangular shape having a side substantially perpendicular to the longitudinal direction of the metal work, and a portion along the longitudinal direction of the metal work of the trimming line portion is a through hole. A trimming method for separating a product from a metal workpiece, the metal workpiece being formed in a hoop shape, being transported in a predetermined transport direction, temporarily stopped, or in a predetermined transport direction. In the direction perpendicular to the longitudinal direction of the metal work, the two trimming line portions sandwiching the product are separated back and forth by one side at a time, and each trimming line portion in the direction perpendicular to the longitudinal direction of the metal work is , Along each trimming line part, grasp the product part and the outside of the product with another clamp part, and clamp the outside of the product of each trimming line part with the product part. By moving the clamped part along the product surface in the horizontal direction and relatively away from each other, the trimming line part sandwiching the product in the direction perpendicular to the longitudinal direction of the metal work is torn, and the trimming line part A trimming method characterized in that a product part and an unnecessary part are separated from each other. 2. The trimming method according to claim 1, wherein the product section is a shadow mask. 3. The apparatus according to claim 2, wherein a relative moving distance between the clamp portion holding the outside of the product and the clamp portion holding the product portion is provided on a side around the product along the longitudinal direction of the metal work. A trimming method characterized in that the gap is not more than the gap between the notch and the unnecessary portion. 4. A strip-shaped continuous metal sheet is etched to form a product, a half-etched portion and a through-hole portion all around the product, and the half-etched portion integrally connects the product and unnecessary portions. And the trimming line
It is a metal work that is continuous in a strip shape, and the product has a substantially rectangular shape having a side substantially orthogonal to the longitudinal direction of the metal work, and a portion of the trimming line portion along the longitudinal direction of the metal work penetrates. A trimming device for separating a product from a metal work, which is formed only of a hole, wherein the metal work is formed into a hoop, and is conveyed in a predetermined conveyance direction. In the direction perpendicular to the direction, the two trimming line parts sandwiching the product are separated back and forth by one side, and along each trimming line part in the direction perpendicular to the longitudinal direction of the metal work, the product part and the product A separate clamp is provided to grip the outside.The clamp that grips the outside of the product at each trimming line and the clamp that grips the product are horizontal along the product surface. Trimming device which is characterized in that as it can move relative to leave each other. 5. A strip-shaped continuous metal sheet is etched to form a product, a half-etched portion and a through-hole portion all around the product, and the product and the unnecessary portion are integrally connected at the half-etched portion. And the trimming line
It is a metal work that is continuous in a strip shape, and the product has a substantially rectangular shape having a side substantially orthogonal to the longitudinal direction of the metal work, and a portion of the trimming line portion along the longitudinal direction of the metal work penetrates. It is a trimming device for separating a product from a metal work consisting of only a hole portion, wherein the metal work is formed in a hoop shape, while being conveyed in a predetermined conveyance direction, in a direction orthogonal to the longitudinal direction of the metal work, The two trimming lines sandwiching the product are separated back and forth one side at a time, and along each trimming line in the direction perpendicular to the longitudinal direction of the metal work, grab the product part and the outside of the product, respectively, and synchronize with transport. The clamps that hold the outside of the product at each trimming line and the clamps that hold the product are further horizontal along the product surface. A trimming device which is characterized in that as it can move relative to leave each other. 6. The product part according to claim 4, wherein
A trimming device, which is a shadow mask.