JPH06227521A - Continuous trimming machine - Google Patents

Abstract

PURPOSE:To completely punch out all moldings in 24-hour continuous operation, without damage of press blades. CONSTITUTION:In a continuous trimming machine, a thin sheet member 1 processed in a lump by press forming if a continuous molding machine and fed from the machine ia arranged on a hard stage and specified numbers of moldings are punched out in a lump repeatedly out of the thin sheet member 11 by the lowering motion of the vertically movable press blade arranged above the stage. A soft long substrate sheet 25 is put between the thin sheet member 11 and the stage and then the substrate sheet 25 is arranged so as to enable to inch in a specified direction on the stage by a feeding mechanism 26. And the substrate sheet 25 is inched diagonally to make an acccute angle with the feeding direction of the thin sheet member 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous trimming machine. More specifically, the thin sheet member is press-molded by a continuous molding machine, and then a continuous trimming machine at a subsequent stage determines a molded product from the thin sheet member. It relates to a continuous trimming machine that punches each number in batch.

[0002]

2. Description of the Related Art In general, lightweight plastic containers such as food containers and blister packs are made by pressing a thin sheet member made of plastic, which is a raw material, by a continuous molding machine. It is continuously manufactured by punching a predetermined number of molded products in a batch from a press-formed thin sheet member that has been molded and sent from the continuous molding machine, by a continuous trimming machine in the subsequent stage.

Concretely, the continuous forming machine includes a continuous vacuum forming machine, a continuous pressure forming machine, a hot plate pressure forming machine, and the like. In these various continuous forming machines, press forming by upper and lower molds is used. For example, as shown in FIGS. 6 and 7, for a thin sheet member (1), a molded product group (3) consisting of a large number of molded products (2) is formed by a single press molding process [one shot]. After that, the thin sheet member (1) is transferred at a constant pitch, and then the next press molding process [one shot] is performed. By repeating the feeding of these thin sheet members (1) and the press forming process using the upper and lower molds, the long thin sheet member (1) is fed out while forming a group of molded products (one shot at a time) along the longitudinal direction thereof. 3) is formed sequentially. The thin sheet member (1) sent out while being press-formed in this way
Is supplied to a continuous trimming machine arranged in the subsequent stage of the continuous molding machine.

As shown in FIG. 8, the continuous trimming machine is an iron plate stage (which supports a press-formed thin sheet member (1) sent from the continuous molding machine so as to be movable in the direction of the arrow in the figure ( 4) and a press blade unit (5) arranged vertically above the stage (4). In this press blade unit (5), a plurality of press blades (7) called Thomson blades are embedded in the lower surface of a block-shaped base (6). One press blade (7)
According to the shape of the molded product (2) of the thin sheet member (1),
For example, it is a plate-shaped blade that is installed in a flat rectangular shape, with its cutting edge slightly protruding from the lower surface of the base (6), so that the molded product (2) can be stored inside when cutting. A recess (8) is formed in the. The press blades (7) are provided on the base (6) in the number and position corresponding to the one-shot molded product group (3) of the thin sheet member (1).

In this continuous trimming machine, the press-formed thin sheet member (1) sent from the continuous molding machine is transferred on a stage (4), and a one-shot molded product group (3) is pressed. When positioned directly under the blade unit (5), the press blade unit (5) moves downward, and the one-shot molded product group (3) is collectively collected by each press blade (7) to form a thin sheet. Punch from member (1). Then, after the press blade unit (5) has risen and returned to the initial position, the worker collects each molded product (2), and the thin sheet member (1) is formed into a one-shot molded product group. By moving the press blade unit (5) up and down in synchronism with the transfer at each feed pitch (3), the press blade (7) moves the thin sheet member (1) into a one-shot molded product group. Punch each (3) in sequence.

[0006]

By the way, in the above-mentioned conventional continuous trimming machine, the press blade (7) is lowered from above toward the thin sheet member (1) placed on the stage (4). The thin sheet member (1) is moved by pressing the press blade (7) against the thin sheet member (1).
The molded product (2) is punched for each one-shot molded product group (3). Therefore, in order to completely punch out the thin sheet member (1), of course, the press blade (7)
The blade edge of is in contact with the iron plate stage (4). Since this stage (4) is hard, the cutting edge of the press blade (7) is easily damaged, and fine iron scraps are generated on the stage (4) and become foreign matter inside the molded product (2). It was sometimes mixed.

As a matter of fact, even if the thin sheet member (1) is to be completely punched by the press blade (7) as described above, the one-shot molded product group (3) is collectively processed, It is very difficult to maintain the parallelism between the plurality of press blades (7) and the stage (4), so that there are press blades (7) that come into contact with the stage (4) too much, or conversely,
There is a press blade (7) that does not completely punch through the thin sheet member (1) without coming into contact with the stage (4), making it difficult to punch out the thin sheet member (1) completely. It is the current situation.

Then, as shown in FIG. 9, the stage (4)
Place a soft underlayment plate (9) such as plastic on top,
Place the thin sheet member (1) on it and press the blade (7)
It is designed to be moved down until it bites into the underlayment plate (9). As a result, since the underlayment plate (9) is interposed between the thin sheet member (1) and the stage (4), the press blade (7) does not contact the stage (4) and the soft underlayment plate (9) ), The thin sheet member (1) is punched out, so the cutting edge of the press blade (7) is not damaged, and fine iron scraps are not generated from the stage (4) It doesn't mix in). Moreover, it becomes easy to completely punch out the thin sheet member (1).

However, if the underlayment plate (9) is still laid on the stage (4) in a fixed state, the cutting edge of the press blade (7) is cut by the underlayment plate (9) by the first punching by the press blade (7). A concave groove corresponding to the shape of the press blade (7) will be engraved at the position where the abutting contacts, and the cutting edge of the press blade (7) will be in the same position on the underlayment plate (9) in the second and subsequent punchings. Since it abuts, it fits into the above-mentioned concave groove, and as a result, it becomes difficult to completely punch out the thin sheet member (1) with the press blade (7).

In order to solve this problem, the press blade (7)
Thus, each time the thin sheet member (1) is punched out for each one-shot molded product group (3), the underlaying plate (9) is displaced by a minute dimension. In this way, the press blade (7) will not fit into the groove formed in the underlayment plate (9) in the previous punching, and it will not come into contact with the same location on the underlayment plate (9) and will always be a new location. Since it comes into contact with the thin sheet member (1), the press blade (7) can completely punch out the thin sheet member (1).

However, as described above, the thin sheet member (1) is formed into a one-shot molded product group (3) by the press blade (7).
Even if the underlayment board (9) is shifted each time it is punched out, if one tries to punch out tens of thousands of molded product groups (3) from the viewpoint of productivity improvement, one underlayment board (9) will be removed. If it is used for a long period of time, the surface of the product may be frayed and minute debris may be mixed in the molded product (2). Therefore, since the use limit of one sheet of the underlayment plate (9) is quickly reached, the underlayment plate (9) must be replaced many times. Therefore, the worker must always manage the replacement time while performing the replacement work, and it is very difficult to realize a 24-hour continuous operation.

Therefore, the present invention has been proposed in view of the above problems, and an object of the present invention is to completely punch through all molded products without damaging the press blade.
It is to provide a continuous trimming machine that can realize continuous operation for 4 hours.

[0013]

As a technical means for achieving the above object, the present invention is a thin sheet member that is press-molded in a batch by a continuous molding machine and sent out from the continuous molding machine. Is placed on a hard stage, and in a continuous trimming machine that punches a predetermined number of molded products at a time from a thin sheet member at a time by downward movement of a press blade that is vertically movable above the stage, A long underlay sheet is inserted between the stage and the thin sheet member, and the underlay sheet is arranged so as to be movable in a predetermined direction on the stage by a feeding mechanism.

It is desirable that the underlay sheet be moved by its feed mechanism in an inclining direction that forms an acute angle with the feed direction of the thin sheet member.

[0015]

In the present invention, the soft and long underlay sheet is inserted between the stage and the thin sheet member, and the underlay sheet is arranged so as to be movable in a predetermined direction on the stage by the feeding mechanism. , In synchronization with punching a predetermined number of molded products from the thin sheet member at once with a press blade,
If you move the underlay sheet by the feeding mechanism,
All the molded products can be completely punched out without damaging the press blade, and the replacement time of the used underlay sheet can be significantly extended, and it becomes easy to realize 24-hour continuous operation.

Further, when the above-mentioned underlay sheet is slid in an inclined direction forming an acute angle with respect to the feeding direction of the thin sheet member, the press blade does not contact the same place of the underlay sheet and Since it is possible to shift the abutting portion every time it is punched and always abut on a new portion, it becomes possible to punch the thin sheet member satisfactorily with the press blade without the inclusion of foreign matter in the molded product.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a continuous trimming machine according to the present invention will be described with reference to FIGS. The continuous molding machine installed in the preceding stage of the continuous trimming machine is the same as the conventional one, and thus the duplicated description will be omitted.

FIG. 1 is a front view showing the whole of the continuous trimming machine of the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is an enlarged front view of an essential part of FIG. 1. The continuous trimming machine has been press-formed. Press part (14) for punching the molded product (12) from the thin sheet member (11) for each one-shot molded product group (13)
A loader section (16) for supplying the press-formed thin sheet member (11) sent from the continuous molding machine to the press section (14) through the guide rail (15), and the press section ( The main part is constituted by an unloader section (18) that carries out a molded product (12) punched out from the thin sheet member (11) at 14) to a subsequent process via a discharge unit (17).

In the press section (14), (19) is an iron plate stage fixed horizontally to the upper part of the frame (20a), and (21) is slidable vertically on the frame (20a). An elevating rod that is vertically installed so that its upper end projects from the stage (19).
(22) is a motor that is a drive source for vertical movement of the press blade fixedly installed at the bottom of the gantry frame (20a), and its output shaft is a worm reducer (2) installed at the bottom of the gantry frame (20a).
It is connected to one end of the crank mechanism (24) via 3), and the other end of the crank mechanism (24) is connected to the lower end of the elevating rod (21).

(25) and (26) are an underlay sheet and a feeding mechanism therefor, which are the features of the present invention.

The underlay sheet (25) is made of, for example, a resin such as polypropylene and is soft and long, and is slidably arranged on the stage (19). Therefore, the thin sheet member (11) sent from the continuous molding machine (not shown) is introduced onto the stage (19) along the direction indicated by the arrows in FIGS. The above-mentioned underlay sheet (25) is inserted between the stage (19) and the stage (19). Further, as shown in FIG. 2, regarding the planar arrangement relationship between the underlay sheet (25) and the thin sheet member (11), the underlay sheet (25) is indicated by an arrow in the figure.
Is arranged so that it can be moved in a slanting direction B that forms an acute angle with respect to the feeding direction A of the thin sheet member (11) by a feeding mechanism (26) described later.

The above-mentioned feeding mechanism (26) has the following structure. That is, (27) is a spool provided on the gantry frame (20b) of the loader section (16) on the front side where the continuous molding machine is installed, and the underlay sheet (25) before use is wound up. is there. (28) is a rotating roller attached to the front side of the gantry frame (20a), and is the spool (27).
The underlay sheet (25) fed out from is turned upward. (29) is the stage (1) of the frame (20a)
9) A presser pad provided near the stage and located at the front and rear ends of the underlay sheet (25) of the stage (19) in the feed direction.
The underlay sheet (25) is turned toward the stage (19) and turned downward from the stage (19). When punching with a press blade, the underlay sheet (25) is clamped and the stage (19) is moved. ) Fixed above. (30)
Is a group of drive rollers attached to the rear side of the gantry frame (20a), which sandwiches the used underlay sheet (25) drawn out from the stage (19) and pulls it to send it downward. (31) is a cutter mechanism arranged below the drive roller group (30) on the rear side of the gantry frame (20a),
By cutting the used underlayment sheet (25) fed from the drive roller group (30), the underlayment sheet (2) is cut.
5) Make disposal easy.

Reference numeral (32) is a guide provided in the vicinity of the holding pad (29) of the gantry frame (20a). Insert 11) and turn downward. Reference numeral (33) is a discharge mechanism for the thin sheet member (11) provided on the gantry frame (20a) below the guide (32).

Next, in the above-mentioned press section (14),
(34) is a lifting rod (21) protruding from the stage (19)
The lifting block attached to the upper end of the
A press blade unit (36), which will be described later, is attached so as to be movable by a guide (35) installed so as to project toward the unloader part (16), and an unloader part (18) is provided on the upper part.
A motor (38), which is a drive source for the horizontal movement of the press blade, is attached to the tip of a frame (37) mounted so as to project toward the arm (3) and extends horizontally from the output shaft of the motor (3).
One end of the press blade unit (36) is connected via 9).

In the press blade unit (36), as specifically shown in FIG. 4, a plurality of press blades (41) called Thomson blades are embedded in the lower surface of a block-shaped base (40) having laminated veneer plates, for example. Has been done. Single Press Blade (41)
Is a plate which is arranged, for example, in a plane rectangular shape in conformity with the shape of the molded product (12) of the thin sheet member (11), and is attached with its cutting edge slightly protruding from the lower surface of the base (40). It has a blade shape, and inside it is a molded product when cut (12)
A recess (42) is formed so that the can be stored. The press blades (41) are provided on the base (40) in the number and position corresponding to the one-shot molded product group (13) of the thin sheet member (11).

Further, a molded product (12) formed by the press blade (41)
After the punching, a suction mechanism (43) for the molded product (12) is provided in order to surely store the molded product (12) in the recess (42) of the press blade (41). This adsorption mechanism (43)
A frame-shaped porous member (44) such as a sponge is fixed along the entire inner circumference of the cutting edge of the press blade (41), and is formed in the base (40) to form a suction means such as a vacuum pump. [Not shown], the tip of a pipe (46) extending from the suction pipe line (45) common to the press blades (41) is embedded in the porous member (44), and the pipe (46) A small hole (47) is bored from the tip to the lower end surface of the porous member (44).
The porous member (44) is positioned so that the blade edge of the press blade (41) slightly projects from the lower end surface thereof.

Incidentally, (48) is a cushion material such as urethane disposed on the lower surface of the base (40) on the outer side of the cutting edge of the press blade (41), and the base (40) is projected from the cutting edge of the pressing blade (41). It is fixed to the bottom surface of 40). When the molded product (12) is punched out by the press blade (41), the cushion material (48) is pressed and contracted after coming into contact with the thin sheet member (11), and the blade edge of the press blade (41) and the base. By filling the gap formed with the lower surface of the (40), press dust is prevented from entering the gap.

Discharging unit (17) of unloader section (18)
Is the frame (20) on the rear side of the press section (14).
It is installed in c) so that it can move up and down, and the press blade unit (36)
The movable table (49) for receiving and mounting the molded product (12) transferred in the state of being held by the movable table (49), which is slidably attached to the lower part of the frame (20c) of the frame. It is composed of a frame body (50) on which a large number of molded articles (12) placed on the top are paid out and transferred to a fixed table (not shown) located in the front.

Next, the operation of the continuous trimming machine having the above structure will be described.

First, the thin sheet member (11) sent out from the former continuous molding machine is taken along the guide rail (15) of the loader section (16) by a one-shot by the upper and lower molds in the continuous molding machine. Each of the molded product groups (13) is intermittently transferred at a constant pitch and supplied to the press section (14).

On the other hand, in the press section (14), the stage (1
9) The thin sheet member (11) supplied from the loader section (16) with the underlay sheet (25) placed thereon.
Are placed on the underlay sheet (25). This allows
The underlay sheet (25) is placed between the stage (19) and the thin sheet member (11). In this state, if the one-shot molded product group (13) of the thin sheet member (11) is positioned and arranged immediately below the press blade unit (36) on the stage (19), the one-shot molded product group (13) will move to the front and rear of the stage (19). A presser foot pad (29) allows the underlay sheet (2
5) Clamp and fix.

Then, the operation of the motor (22) moves the press blade unit (36) of the elevating block (34) downward through the elevating rod (21) by the crank mechanism (24) through the worm speed reducer (23). Let As a result, each press blade (41) of the press blade unit (36) is a one-shot molded product group from the thin sheet member (11) placed on the stage (19) via the underlay sheet (25). Punch (13) together.

At this time, the blade edge of the press blade (41) completely punches out the thin sheet member (11) and slightly cuts into the soft underlayment sheet (25) located immediately below it. It never reaches the rigid stage (19) directly below the seat (25). On the other hand, in the press blade unit (36), the molded product (12) cut and separated by the press blade (41) is sucked by the suction mechanism (43) and stored and held in the recess (42). That is, the molded product (12) is adsorbed to the porous member (44) through the suction pipe line (45) and the pipe (46) by the evacuation from the suction means (not shown), and the molded product (12) is placed in the recess (42). It is securely stored and held.

Next, the press blade unit (36) of the elevating block (34) is moved up to reach its rising end position, and then the arm (39) is turned by the operation of the motor (38). The press blade unit (36) connected to the tip of the arm (39) along the guide (35), that is, the unloader section (18) at the rear stage of the press section (14).
It is slid to the side and placed above the movable table (49).

In the unloader section (18), the press table unit (3) is raised by raising the movable table (49).
6) is arranged immediately below and the vacuum is removed from the press blade unit (36) at that time, and the molded product (1) stored and held in the recess (42) of the press blade (41) is released.
Open 2) and place it on the movable table (49). At this time, the molded product (12) is released from the press blade unit (36) and placed on the movable table (49).
Since it is almost housed in the recess (42) of the press blade (41), the molded product (12) is completely removed from the recess (42) by moving the movable table (49) slightly downward. Then, the press blade unit (36) is returned to the press section (14) and returned to the initial position.

By repeating the above operation in the loader section (16), the press section (14) and the unloader section (18),
A large number of molded products (12) are stacked for each one-shot molded product group (13) on the movable table (49) of the unloader section (18), and when the predetermined amount is reached, the movable table (49) is fixed. The molded product (12) on the movable table (49) is transferred to the fixed table by the frame body (50) so as to be flush with the table. By repeating this operation, it is possible to sequentially discharge a large number of molded products (12) stacked on the fixed table for each one-shot molded product group (13).

When the loader section (16), the press section (14) and the unloader section (18) are repeatedly operated, particularly in the press section (14), the press blade unit (36) is moved downward to cause the press blade (41) to move. ) Each time the one-shot molded product group (13) is punched from the thin sheet member (11) until the next one-shot molded product group (13) reaches the punching position. The sheet is transferred at a constant pitch, and the feed mechanism (26) moves the underlay sheet (25) in an inclining direction forming an acute angle with respect to the feed direction of the thin sheet member (11).

That is, the underlay sheet (25) wound around the spool (27) of the loader section (16) is replaced with the press section (14).
By pulling with the drive roller group (30), the underlay sheet (25) is unwound from the spool (27), turned by the rotating roller (28), and then turned again by the presser pad (29). Place on stage (19). And
As shown in FIG. 5, the underlayment sheet (25) is inclined at an acute angle with respect to the feeding direction A of the thin sheet member (11) every time the one-shot molded product group (13) is punched by the press blade (41). Jog in direction B. Underlay sheets like this (25)
By inclining the inclining direction of the underlay sheet (25), the press blade (41) does not come into contact with the same place of the underlay sheet (25), but by the contact point, that is, the press blade (41) bites. The concave groove (m) engraved in can be shifted for each punching so that it can always come into contact with a new location. After that, the used underlayment sheet (25) is turned by the pressing pad (29) to pass through the drive roller group (30), and then cut into pieces by the cutter mechanism (31) for disposal.

In the above embodiment, the thin sheet member (1
The case of punching 1) for each one-shot molded product group (13) has been described, but the present invention is not limited to this, and is applicable to punching one row at a time or a plurality of rows.

[0040]

According to the continuous trimming machine of the present invention, a soft and long underlay sheet is fed in synchronism with punching a predetermined number of molded products from a thin sheet member at once by a press blade. If the mechanism is used for inching, all molded products can be completely punched out without damaging the press blade, and the replacement time of the used underlay sheet can be dramatically extended, allowing continuous operation for 24 hours. It will be easy to realize, the operating efficiency will be greatly improved, and the productivity will be improved.

Further, when the above-mentioned underlay sheet is moved in a slanting direction forming an acute angle with respect to the feeding direction of the thin sheet member, the press blade does not come into contact with the same place of the underlay sheet and Since it is possible to shift the abutting part for each punching and always abut on a new part, it is possible to punch the thin sheet member with the press blade satisfactorily without foreign matter entering the molded product. It is possible to provide high quality products of high quality.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a continuous trimming machine according to the present invention.

FIG. 2 is a plan view showing the continuous trimming machine of FIG.

FIG. 3 is an enlarged front view of essential parts showing a press section of the continuous trimming machine of FIG.

FIG. 4 is a partially enlarged sectional view showing a press blade unit of a continuous trimming machine.

FIG. 5 is a plan view showing a feeding relationship between a thin sheet member and an underlay sheet for each punching of a molded product with a press blade.

FIG. 6 is a plan view showing an example of a thin sheet member.

7 is a sectional view taken along line I-I of FIG.

FIG. 8 is a sectional view of an essential part showing a conventional example of a continuous trimming machine.

FIG. 9 is a cross-sectional view of essential parts showing another example of a conventional continuous trimming machine.

[Explanation of symbols]

 11 Thin sheet member 12 Molded product 13 Molded product group 19 Stage 25 Underlay sheet 26 Feed mechanism 41 Press blade

Claims (2)

[Claims] 1. A thin sheet member press-formed by a continuous molding machine at a time and sent out from the continuous molding machine is placed on a hard stage, and is vertically movable above the stage. In a continuous trimming machine that punches a prescribed number of molded products from a thin sheet member collectively by the downward movement of a press blade, insert a soft and long underlay sheet between the stage and the thin sheet member, and A continuous trimming machine in which an underlay sheet is arranged so that it can be moved in a predetermined direction on a stage by a feed mechanism. 2. The continuous trimming machine according to claim 1, wherein the underlay sheet is moved in an inclining direction forming an acute angle with respect to a feeding direction of the thin sheet member by a feeding mechanism thereof.