JPH05338625A - Continuous forming timming method - Google Patents

Abstract

PURPOSE:To provide a continuous trimming method with superior safety property, which can prevent a serious accident such as a worker's hand is being cut off, etc., from happening. CONSTITUTION:A thin sheet member 4 is fed in a continuous forming machine 3, and press-forming is done in a lump. The thin sheet member 4 which is let out from the continuous forming machine 3 is fed in a continuous trimming machine 9, and the thin sheet member 4 is cut and separated for each formed article by the descending motion of a press upper blade 11 at the continuous trimming machine 9. For such a method, the motion of the press upper blade 11 of the continuous trimming machine 9 is completed at the bottom dead center (b), and at the same time, the motion is started from the bottom dead center (b).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous forming trimming method. More specifically, the present invention relates to a continuous sheet forming member, which is press-formed by a continuous forming machine, and is then moved downward by a continuous upper trimming machine. The present invention relates to a continuous molding trimming method in which each molded product is cut and separated.

[0002]

2. Description of the Related Art Generally, a plastic lightweight container such as a food container or a blister pack is formed by pressing a thin sheet member made of a plastic, which is a raw material, with a continuous molding machine. After that, the formed thin sheet member is continuously manufactured by cutting and separating each formed product by a continuous trimming machine in the subsequent stage.

Specifically, the continuous forming machine includes a continuous vacuum forming machine, a continuous pressure forming machine and a hot plate pressure forming machine.
In these various continuous molding machines, for example, as shown in FIG. 4, a molded product group (2) consisting of a large number of molded products (1) is manufactured by a single press molding process. ) Is prepared, and a mold having a large number of cavities forming an arrangement is prepared, and the mold is attached to the upper and lower press parts [described later]. It should be noted that various types of molds, from small to large, are prepared depending on the type of the molded product (1).

In the above continuous molding machine (3), when the thin sheet member (4) as a raw material is fed in the feeding direction S as shown in FIG. 5, the upper and lower press parts (5) and (6) are operated. The thin sheet member (4) is pressed by the upper and lower press parts (5).
The thin sheet member (4) is sandwiched from above and below by the molds (7) and (8) attached to (6) and press-formed, whereby the thin sheet member (4) is composed of the above-mentioned many molded products (1). The molded product group (2) [see FIG. 4] is delivered while being formed. The thin sheet member (4) sent out while being press-formed in this way is supplied to the continuous trimming machine (9) arranged at the subsequent stage of the continuous molding machine (3).

In this continuous trimming machine (9), a group of molded products (2) consisting of a large number of molded products (1) is formed by press molding by means of dies (7) and (8) of the continuous molding machine (3). The formed thin sheet members (4) are arranged one by one in the lateral direction with respect to the feeding direction S shown in FIG. 4 (rows A, B, C, D, E, F in the drawing).
Is cut and separated into individual molded articles (1), and is provided with a press upper blade (11) arranged vertically above the press lower blade (10) fixedly arranged. The thin sheet member (4) obtained by cutting and separating the molded product (1) is fed by a feeding mechanism (not shown) including a pinch roller (12), while the thin sheet member (4) is cut and separated. The formed product (1) is discharged through the chute (13).

In the continuous trimming machine (9), when the thin sheet member (4) press-formed from the continuous forming machine (3) is fed, the press upper blade located at the top dead center (a). (11) instantly descends to lower press blade (10)
Cut and separate between and. This cutting and separation is usually performed in synchronization with the continuous molding machine (3). For example, by the continuous molding machine (3), a molded product group (2) consisting of 6 × 6 = 36 molded products (1) ) [See FIG. 4] If it is assumed that one press forming process is performed in 6 seconds, the continuous trimming machine (9) will have a horizontal row of the press formed thin sheet members (4). A, B, C, D, E in the figure
Column F] is cut and separated into individual molded products (1) in units of 1 second. As a result, the thin sheet member (4) between the continuous molding machine (3) and the continuous trimming machine (9) does not loosen and is not pulled by the continuous trimming machine (9), and always has a constant state. Retained. Even if the continuous molding machine (3) is stopped due to some cause, or even if one press molding process takes 6 seconds or more, the continuous trimming machine (9) is operated by the continuous molding machine (3). ) Is completed, the continuous trimming machine (9) starts cutting and separating based on a trimming start signal sent from the continuous molding machine (3) to the continuous trimming machine (9). Therefore, the thin sheet member (4) between the continuous forming machine (3) and the continuous trimming machine (9) is always held in a constant state.

[0007]

By the way, in the continuous trimming machine (9), when it is completed to cut and separate the thin sheet member (4) into individual molded products (1) one by one in the lateral direction, it is pressed on the press. The blade (11) completes its operation, stops at its top dead center (a), and waits for the next operation. And
When one press molding process is completed in the continuous molding machine (3), a trimming start signal is issued from the continuous molding machine (3) to the continuous trimming machine (9), and continuous trimming is started based on the trimming start signal. The trimming machine (9) starts operating, and the press upper blade (11) instantly starts descending.

On the other hand, when the continuous trimming machine (9) is to be stopped due to some trouble during the above continuous trimming work, the operator does the continuous trimming machine (9).
The hand may be inserted between the press upper blade (11) and the press lower blade (10) by pressing the stop button of. At this time, although the above-mentioned worker thinks that the continuous trimming machine (9) has stopped due to pressing the stop button,
Actually, the operation of the stop button is not sufficient, the continuous trimming machine (9) is in a standby state for the trimming start signal from the continuous molding machine (3), and the press upper blade (11) is temporarily stopped. There are only cases. In this case, the operator presses the upper blade of the press (11) and the lower blade of the press (10) without knowing it.
If a hand is still inserted between the press upper blade (1) and the trimming start signal from the continuous molding machine (3),
It is the current situation that 1) instantly starts descending and that workers often cut their hands.

Therefore, the continuous trimming machine (9) is provided with various safety measures using a mechanical lock mechanism composed of a safety rod and a sensor. However, a skilled worker may have overconfidence due to a feeling of familiarity with machine work, etc., and may not use the above-mentioned safety mechanism or work as an obstacle in working because he or she tries to work in conjunction with the fast movement of the machine. There is a situation where they are removed, and it is a serious problem that the above-mentioned disconnection accidents are not endless.

Therefore, the present invention has been proposed in view of the above problems, and its purpose is to provide a high degree of safety that can prevent a serious accident such as a worker cutting a hand. It is to provide a continuous molding trimming method.

[0011]

The technical means for achieving the above object in the present invention is to send a thin sheet member to a continuous molding machine, press-form it collectively, and send it out from the continuous molding machine. The thin sheet member is fed to a continuous trimming machine, and the continuous trimming machine cuts and separates the thin sheet member for each press-formed product by lowering the upper blade of the press. That is, the operation of the upper blade is completed at the bottom dead center and the start is started from the bottom dead center.

Further, it is desirable that the upper blade of the press of the continuous trimming machine is started at a fine speed which is fixedly set in advance from the bottom dead center where the operation is completed during the inching operation.

[0013]

In the continuous forming trimming method according to the present invention, since the upper blade of the press of the continuous trimming machine is completed at the bottom dead center and is started from the bottom dead center, the continuous trimming machine is temporarily stopped. Even if the continuous trimming machine is unexpectedly started before the operation is restarted, the operator never cuts the hand due to the instantaneous start of the press upper blade, greatly improving safety. Can be achieved.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of an apparatus for carrying out the continuous molding trimming method according to the present invention will be described with reference to FIGS. It should be noted that the same or corresponding portions as those in FIGS. 4 and 5 are designated by the same reference numerals, and duplicate description will be omitted.

The feature of the present invention is that, as shown in FIG. 1, the press upper blade (11) of the continuous trimming machine (9) completes its operation at the bottom dead center (b) and is started from the bottom dead center (b). I have done so.

Specifically, FIG. 2 shows a schematic control configuration for controlling the continuous trimming machine (9) shown in FIG. 1 to complete and start the operation of the press upper blade (11) at the bottom dead center (b). ..

In the figure, (21) is a sequence controller, which receives a trimming start signal from the continuous molding machine (3) and also an operation panel (22) of the continuous trimming machine (9).
Various push buttons, such as the interlock button (2
3), single operation button (24), one-step button (25), and inching button (26) start operation signals. (2
7) and (28) are first and second speed setting devices connected to the sequence controller (21) through a changeover switch (29), for example, the first speed setting device (27) is interlocked, The operating speed in single-acting and one-step operation is variably set, while the second speed setter (28) sets the operating speed in inching operation at a fixed value. As will be described later, the operating speed in the inching operation is set to a fine speed state and fixed. Reference numeral (30) is a driver connected to the sequence controller (21) through the changeover switch (29), which drives the servo motor (32) by the power supply (31) and presses the upper blade of the press through the speed reducer (33). A drive mechanism (34) for moving the (11) up and down is operated. (35) is an absolute encoder that is connected to the drive mechanism (34) of the press upper blade (11) and detects the vertical position of the press upper blade (11) as a corresponding rotation angle, and (36) is the encoder (35). The controller connected to (1) sends an output signal to the sequence controller (21) based on the angle set by the angle setter (37) and the detection signal from the encoder (35).

The above structure is one specific example, and is a mechanical or means for grasping the vertical position of the press upper blade (11) in controlling the vertical movement of the press upper blade (11). Various electrical configurations are possible.

Next, the operations of the continuous molding machine (3) and the continuous trimming machine (9) shown in FIG. 1 will be described in detail below with reference to the control configuration shown in FIG.

First, in the interlocking operation, as in the conventional case, the continuous molding machine (3) sends out a plurality of thin sheet members (4) which have been press-molded collectively, and the continuous molding machine (3) It is supplied to the continuous trimming machine (9) at the latter stage which is synchronized. In this continuous trimming machine (9), the driver (30) is operated at the speed set by the first speed setter (27) by the speed switching signal from the sequence controller (21) based on the operation start signal from the interlocking button (23). ) Is sent to the press speed command. The servo motor (32) is driven based on this press speed command, and the press upper blade (11) is moved up and down via the speed reducer (33) and the drive mechanism (34). By the vertical movement of the press upper blade (11), the thin sheet member (4) is inserted between the press upper blade (11) and the press lower blade (10). The molded product group (2) is cut and separated for each molded product (1) in horizontal rows (for example, 6 pieces). Then, a predetermined number of molded products (1), that is,
When the cutting and separation of one molded product group (2) [for example, 36] is completed, the press upper blade (11) completes its operation at its bottom dead center (b). After that, when the trimming start signal from the continuous molding machine (3) is sent to the continuous trimming machine (9) and input to the sequence controller (21), the upper press blade (11) is moved based on the trimming start signal. Start operation again. The upper blade (11) of the press starts from the bottom dead center (b) thereof, and the thin sheet member (4) is operated similarly to the above-mentioned operation.
For each of the molded products (1), a horizontal row (for example, 6 pieces) is cut and separated, and the operation is completed at the bottom dead center (b). By repeating this series of operations, cutting and separation of the molded product (1) are sequentially performed in conjunction with the press molding process in the continuous molding machine (3). During this operation, the vertical position of the upper press blade (11) is constantly detected by the absolute encoder (35), and the controller (36) based on the detection signal, the sequence controller with the angle set by the angle setter (37). A control signal is output to (21). Angle setting device (37)
Then, for example, set the top dead center (a) of the press upper blade (11) to 0 °
In this case, in the present invention, the operation completion and starting position is set to the bottom dead center (b), so that the operation completion and starting position of the press upper blade (11) is 180 ° (see FIG. 3). In addition, the transmission position of the feed start signal of the thin sheet member (4) is set to, for example, 20.
If the angle is 0 °, after the press upper blade (11) has completed its operation at the bottom dead center (b), the thin sheet member (4) is immediately moved up from the bottom dead center (b) for the next start. Pinch roller (12)
A predetermined amount is fed by the feeding mechanism including.

Here, during the above-mentioned continuous trimming work,
Continuous trimming machine due to trouble due to some cause (9)
When the operator pushes the stop button of the continuous trimming machine (9) to bring his or her hand close to the press upper blade (11) in an attempt to stop the continuous trimming machine (9), the worker pushes the stop button, thereby Despite the belief that 9) has stopped, in reality the operation of the stop button was not sufficient and the continuous trimming machine (9) was in the standby state for the trimming start signal from the continuous molding machine (3). Trimming start signal from the continuous molding machine (3) when the press upper blade (11) is only temporarily stopped and the operator tries to approach the press upper blade (11) as it is without knowing it. Even if the upper blade of the press (11) starts operating instantly,
Since the press upper blade (11) starts from the state where the operation is completed at the bottom dead center (b), it is possible that a hand is caught between the press upper blade (11) and the press lower blade (10). There is no cutting accident because there is no such thing. Further, as a result, it is not always necessary to take various safety measures using a mechanical lock mechanism including a safety rod, a sensor, or the like.

In addition to the above-mentioned interlocking operation, the inching operation is executed especially when the above-mentioned trouble is repaired or when the setup work and the continuous work before the continuous work are started. In this jogging operation, an operation start signal from the jogging button (26) is input to the sequence controller (21), and in response thereto, a speed changeover signal is sent to the changeover switch (18) and the second speed setter ( 28), and the press speed command is sent to the driver (30) at a slow speed fixedly set by the setting device (28), and based on this, the servo motor (32) is driven, and the speed reducer (33). And drive mechanism (3
The upper blade (11) of the press moves up and down via 4). As a result, the upper blade (11) of the press starts to rise from its bottom dead center (b) at a slow speed, and the operator pushes the inching button (2
When 6) is released, the press upper blade (11) stops operating at that point. In this state, when a trouble is repaired, various setup work is performed, or a continuous work is started, a thin sheet member (4) is provided between the upper press blade (11) and the lower press blade (10). ) Will be set. Then, if the inching button (26) is pressed again when the work is completed, the upper blade (11) of the press starts to operate again at a slow speed, and finally reaches the bottom dead center (b) to complete the operation. Also in this case, as in the case of the interlocked operation described above, the press upper blade (11) starts from its bottom dead center (b), completes its operation at the bottom dead center (b), and operates at a very low speed. However, it is impossible for an operator to cut his hand.

In addition to the inching operation, a single-action operation or a one-step operation may be executed. Single-action operation is a work in which the press upper blade (11) repeats vertical movement continuously, and one-step operation is a work in which the press upper blade (11) performs a vertical movement for one cycle. As for the press upper blade (11), the operation is completed at the bottom dead center (b) and is started from the bottom dead center (b), so that the worker never cuts his hand.

An interlock function is provided so that the press upper blade (11) does not start unless the upper blade (11) is at the position near the bottom dead center in the above-mentioned inching, single-action and one-step operation.

[0025]

According to the method of the present invention, the upper blade of the press of the continuous trimming machine is completed at the bottom dead center and is started at the bottom dead center. Therefore, the continuous trimming machine is once stopped and then operated again. Even if there is an unexpected start of the continuous trimming machine before the start, the operator never cuts his or her hand by the instantaneous start of the press upper blade, and the safety is greatly improved. Further, it is not always necessary to take various safety measures using a mechanical lock mechanism composed of a safety rod, a sensor and the like as in the related art, so that it is possible to simplify the equipment and reduce the cost of the product.

[Brief description of drawings]

FIG. 1 is an overall schematic configuration diagram showing an example of an apparatus for carrying out a method of the present invention.

FIG. 2 is a block diagram showing an example of a schematic electric circuit for carrying out the method of the present invention.

FIG. 3 is an explanatory diagram showing an angle setting for detecting the top dead center and the bottom dead center of the press upper blade.

FIG. 4 is a plan view showing a molded product of a thin sheet member used in a continuous molding trimming method.

FIG. 5 is a schematic configuration diagram showing a continuous molding machine and a continuous trimming machine used in a conventional method.

[Explanation of symbols]

 3 Continuous forming machine 4 Thin sheet member 9 Continuous trimming machine 11 Press upper blade b Bottom dead center

Claims (2)

[Claims] 1. A thin sheet member is sent to a continuous forming machine to be press-formed in a batch, and the thin sheet member sent out from the continuous forming machine is sent to a continuous trimming machine, where the continuous trimming machine is used. In the method of cutting and separating the thin sheet member for each molded product by the downward movement of the press upper blade, the operation of the press upper blade of the continuous trimming machine is completed at the bottom dead center and is started from the bottom dead center. A continuous molding trimming method characterized by the above. 2. The continuous upper end of the press of the continuous trimming machine according to claim 1, characterized in that, during the inching operation, the upper blade is started at a fine speed that is fixedly set in advance from the bottom dead center when the operation is completed. Molding trimming method.