JPH0615021Y2 - Vacuum forming machine with free blow - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an apparatus suitable for vacuum forming a resin sheet.

(Prior art and problems) Conventionally, as one of the vacuum forming machines for resin sheets, a resin sheet set on a free-blow box and heated and softened is expanded by air pressure and then adsorbed to a forming die to form a resin. There are so-called free blow vacuum forming machines configured to form sheets. By the way, in the vacuum forming machine configured as described above, the setting of the resin sheet on the free blow box and the removal of the molded product from the free blow box are all performed manually by the operator, and therefore, In addition, it requires a lot of labor for the worker, and generally, the resin sheet is large (maximum size, 2m x 3m x 8mm), and when setting the resin sheet in the opening of the ceiling wall of the free blow box,
There is a problem that it is very dangerous because the worker has to lean out through the opening.

The present invention has been made to solve the above problems.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the vacuum forming machine with a free blow of the present invention has a closed box-like shape, and the molding die is internally mounted so that it can move up and down. Above the free blow box having an opening, a frame-shaped lifting frame that descends to clamp the resin sheet with the free blow box and to mount the molded product clamping means to lift the resin molded product,
It is arranged so that it can be moved up and down, and at the position directly above the opening of the free blow box, a resin molded product placement member is provided on the upper surface and a conveyance means equipped with a resin sheet suction mechanism on the lower surface is arranged so that it can be put in and out. It was done.

(Operation) The vacuum forming machine with free blow configured as described above is
The resin sheet is adsorbed to the lower surface of the conveying means and carried by the conveying means into the opening of the ceiling wall of the free blow box. Furthermore, the molded product is once lifted by the frame-shaped lifting frame and the conveying means is moved below this. After that, the molded product can be placed on the conveying means, and thereafter, the molded product can be carried out from the free blow box by the conveying means.

(Embodiment) An embodiment will be described with reference to FIG. 1 and FIG. 2. In FIG. 1, (1) shows a free-blow which is in the form of a closed box and which is connected to a compressed air source (not shown) for communication. In the box, a mold (2) having a suction mechanism is arranged in the free blow box (1) so as to be able to move up and down through a lifting table (3), and further, the ceiling wall of the free blow box (1). An opening (4) through which the mold (2) can pass is formed in the mold. Further, a gate type frame (5) is installed on the free blow box (1), and a downward facing cylinder (6) is fixedly provided at the center of the ceiling of the gate type frame (5). A pushing plate (7) is fixed to the lower end of the piston rod of (6). Further, two pairs of toggle mechanisms (8) (8) are mounted on the ceiling of the gate-shaped frame (5) at required intervals in the front-rear direction and the left-right direction, and the two pairs of toggle mechanisms (8) (8) are attached. A frame-shaped lifting frame (9) having the same inner size as the opening (4) of the free blow box (1) is mounted by pin connection between the lower ends of (). The toggle mechanism (8) (8) has front and rear toggle mechanisms (10) (10), respectively.
And the two connecting rods (10) (1
The right end of 0) is connected by a connecting member (11).
In addition, the connecting member (11) includes a horizontally oriented cylinder (1
The tip of the piston rod of 2) is pin-connected, and the cylinder (12) is installed on the right side of the portal frame (5) and the free blow box (1) adjacent to them, and the portal frame (13). ) Bracket (1
It is pivoted through 4). In addition, rollers (15) and (15) are pivotally supported near the four corners of the elevating frame (9), and the rollers (15) and (15) are mounted on columns of the portal frame (5). Pair of rails (16) (1
6), the lifting frame (9) is guided by rails (16) and (16) through rollers (15) and (15) by the expansion and contraction operation of the cylinder (12) to ascend and descend and descend. Sometimes, the resin sheet (S) on the free blow box (1) is sandwiched by the free blow box (1). Further, resin molded product clamping means (17) (17) capable of clamping the molded resin molded product with the elevating frame (9) at the left and right both sides at the center portion on both the left and right sides of the lifting frame (9). As shown in FIG. 2, the resin-molded product clamping means (17) mounted on the lifting frame (9) are pivotally supported by the elevating frame (9) and the bracket (18) facing downward. A supporting shaft (2) rotatably supported at the lower part of (18) and oriented in the front-back direction.
0), a plurality of claw members (21) (21) mounted on the support shaft (20) at appropriate intervals in the front-rear direction, the tip of the piston rod of the cylinder (19), and the support shaft (20).
And a link mechanism (30) for connecting one end of the claw member (21) with the support shaft (20) as a fulcrum by the expansion and contraction of the cylinder (19). It is like this.

Further, as shown in FIG. 1, a base (22) is installed on the left side of the free blow box (1) adjacent to the base (22). A conveying means (24) provided with a mounting member (23) and equipped with a suction mechanism (not shown) for adsorbing a resin sheet on the lower surface thereof moves horizontally to directly move the opening (4) of the free blow box (1). It is placed in the upper position so that it can be moved in and out. Also, the base (2
2), a resin sheet lifting table (25) is mounted so as to be able to move up and down via an upwardly facing cylinder (26), and the resin sheet lifting table (25) is mounted on the conveying means (2).
It is arranged below 4). The free blow box (1) is provided at the middle position of the gate-shaped frame (13).
A pair of upper and lower heating means (27) and (28) for heating the resin sheet (S) set above from both the upper and lower sides move horizontally and move into and out of both the upper and lower positions of the opening (4) of the free blow box (1). The heating means (2
8) can be moved into and out of the free blow box (1) through an opening (not shown) formed in the side wall of the free blow box (1). The heating means (28) inlet / outlet opening (not shown) formed on the side wall of the free blow box (1) is heated when the heating means (28) exits the free blow box (1). A lid member (not shown) attached to the left end of the free blow box (1) is airtightly closed.

Next, the operation of the apparatus thus configured will be described. When the conveying means (24) enters the free blow box (1) in the preceding step, the resin sheet (S) cut into a predetermined size is placed on the resin sheet lifting table (25) and the The state shown in FIG. In this state, first, the cylinder (26) is extended to press the resin sheet (S) on the resin sheet lifting table (25) against the lower surface of the conveying means (24), and then the resin sheet (S).
Is sucked onto the lower surface of the conveying means (24) by a suction mechanism (not shown). Then, the cylinder (26) is contracted to lower the resin sheet lifting table (25),
The adsorbed resin sheet (S) is carried into the position immediately above the opening (4) of the free blow box (1) by the conveying means (24), and then the adsorbed resin sheet (S) is released and conveyed into the conveying means. Drop it from (24) and place it on the free blow box (1).

The transport means (24) is a free blow box (1).
Another resin sheet (S) is placed on the resin sheet push-up table (25) when it goes up. Next, after the conveying means (24) is retracted above the resin sheet lifting table (25), the elevating frame (9) in which the cylinder (12) has been extended is lowered to lower the elevating frame (9) and the free blow frame. The resin sheet (S) on the free blow box (1) is sandwiched between the box (1) and the box (1), and subsequently, heating means (27) (28) are provided on both upper and lower sides of the sandwiched resin sheet (S). Are moved to heat and soften the resin sheet (S). After heating and softening the resin sheet (S) to a desired state, the heating means (27) (28) is moved out of the resin sheet (S) position, and then compressed air is fed into the free blow box (1). The softened resin sheet (S) is supplied and expanded upward. Then, the molding die (2) is raised through the lifting table (3) to press the molding surface of the molding die (2) against the resin sheet (S), and subsequently,
After discharging the compressed air in the free blow box (1), the cylinder (6) is extended to push the resin sheet (S) into the recess of the molding die (2) with the pushing plate (7), and The sheet (S) is adsorbed on the die surface of the forming die (2), and thus the resin sheet (S) is vacuum formed.
After the vacuum forming of the resin sheet (S) is completed, the cylinder (6) is contracted to raise the pushing plate (7), and the suction state of the resin sheet (S) to the forming die (2) is released. The mold (2) is lowered together with the lifting table (3). Next, the cylinders (19) (19) of the resin molded product clamping means (17) (17) are extended to operate the molded resin molded product at the left and right sides of the lifting frame (9) and the claw member (21). (21) and then the cylinder (1
2) is contracted to raise the elevating frame (9) to lift the resin molded product from above the free blow box (1). Next, in the same manner as described above, the conveying means (24) having the resin sheet (S) adsorbed on the lower surface thereof is again advanced above the free blow box (1), and then the cylinder (19).
(19) is contracted to release the sandwiched state of the resin molded product, and the resin molded product is dropped onto the placing member (23), and then the resin sheet (S) is sucked onto the conveying means (24). And the resin sheet (S) is placed on the free blow box (1), and then the conveying means (24) is retracted above the resin sheet lifting plate (25) to remove the resin molded product from the free blow box (1). (1) Carried out from above, the operator takes out the carried resin molded product from the mounting member (23), and one cycle is completed.

If the mold (2) does not have a deep recess, the cylinder (6) and the pushing plate (7) may be omitted.

(Effect of the Invention) As is apparent from the above description, according to the present invention, the resin sheet can be carried into the free blow box by the conveying means, and when the conveying means is retracted from the free blow box, the resin molded product is obtained. Since it can be carried out from the free blow box, it is possible for the worker to be released from the harsh and dangerous work. Moreover, the resin sheet can be carried into the free blow box and the molded product can be removed from the free blow box. It has an excellent practical effect that it can be carried out from the device by one carrying means.

[Brief description of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a front view and a second view.
The drawing is an enlarged view of a portion A in FIG. (1): Free blow box (2): Mold (4): Opening (9): Elevating frame (17): Resin molded product sandwiching means (23): Resin molded product placement member (24): Conveying means ( 27), (28): heating means

Claims (1)

[Scope of utility model registration request] 1. A free blow box which is in the form of a closed box and is connected to a compressed air source so as to communicate therewith, and has a molding wall passage opening formed in a ceiling wall; A mold provided with a suction mechanism on its surface; a free blow box which is arranged above the free blow box so as to be able to move up and down and whose lowering stroke is the peripheral edge of the resin sheet placed on the free blow box. A frame-shaped lifting frame having a length capable of being clamped;
A molded product clamping means which is mounted on the elevating frame and clamps a resin molded product between the elevating frame and the elevating frame; disposed horizontally above and above the opening of the ceiling wall of the free blow box so as to be able to enter and exit in a horizontal state; Conveying means provided with a resin molded product placing member and a suction mechanism for adsorbing a resin sheet on the lower surface; and an opening of the free blow box which is arranged so as to be able to enter and exit above and below a ceiling wall opening of the free blow box. A vacuum forming machine with a free blow, comprising: heating means for heating the resin sheet set above from both upper and lower sides;