JPH02155626A - Method and apparatus for molding film - Google Patents

Abstract

PURPOSE:To prevent the shift of a heating position by forming pockets to a plurality of heated sections and making one feed pitch of a film equal to the feed pitch of a plurality of the sections and positioning the film by the pocket at the rearmost part molded in the film. CONSTITUTION:A film is moved toward a molding apparatus 4 by a predetermined pitch while held between a pair of heating devices 2 and heated in a plurality of sections 23 spaced apart in the longitudinal direction of the film during this movement. When the heated section reaches the position of the molding apparatus 4 by the movement of the heating devices 2, a plurality of pockets P are molded in the film by the molding apparatus 4 and the molded film is fed by one feed pitch by the next movement of the heating devices. When the next heated section is fed to the position of the molding apparatus, the pockets P is molded in said section by the molding apparatus but one of the previously molded pockets P is engaged with a positioning apparatus 54 at this time to position the film.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a method and an apparatus for continuously forming multi-modified pockets for storing items such as electronic components into a strip-shaped film.

(b) Prior Art When continuously forming containers, or pockets, for storing items on a strip-shaped film, it is necessary to heat the film to a desired temperature with a heater. The film is heated by being sandwiched between a pair of heating plates provided at the bottom. Japanese Utility Model Application No. 58-60414 discloses a conventional device that heats only the necessary area according to the shape of the pocket to be formed without heating the entire surface of the film when heating the film. has been done.

By the way, as shown in the above publication, when a film is simply transferred by being held between heating plates that move back and forth in the transfer direction, the first holding surface of the heating plates and the next Misalignment between the clamping surface and the clamping surface is likely to occur. Furthermore, as described in the above-mentioned publication, when the heating area of the film is limited, such positional deviation makes it difficult to effectively heat only the necessary areas.

(c) Problems to be Solved by the Invention The problems to be solved by the present invention are to produce a film that is sandwiched between a heating device that moves back and forth intermittently, partially heated, and formed into a film using the heated portions. The purpose of this invention is to prevent displacement of the heating position in the molding method and apparatus.

(d) Means for Solving the Problems In order to solve the above problems, one invention of the present application heats only a required area of a strip-shaped film with a linearly reciprocating heating device, and In the film forming method, the film is sandwiched by the heating device and heated in a plurality of regions separated in the longitudinal direction, and the pockets are formed in the plurality of heated regions of the film. is formed, the pitch of one feed of the film is equal to the feed pitch of the plurality of zones, and the film j is positioned by a rearmost pocket formed in the film.

Another invention of the present application includes a heating device that moves back and forth in a straight line and a forming device that molds the film heated by the heating device, and the heating device holds a strip-shaped film and heats only a required area. In a film forming apparatus that forms pockets on the film in the heated area by the forming apparatus, C1 sets the moving pitch of the heating apparatus equal to the feed pitch of the plurality of areas, and the forming apparatus A number of molding molds equal to the number of longitudinal zones heated by the device and molding recesses cooperating with the molding male molds to form the pockets are provided; A positioning device for positioning the film is also provided.

(e) Effect In the above configuration, the film is heated in a plurality of regions separated in the longitudinal direction of the film while being held between the pair of heating devices and moved toward the forming device by a predetermined pitch. When the heated area is moved by the heating device to the position of the forming device, the forming device forms a plurality of pockets in the film. The formed film is fed by one feeding pitch by the next movement of the heating device. As the next heated area is delivered to the forming device, the forming device forms a pocket in that area by engaging one of the previously formed pockets with the positioning device, thereby forming a film. is positioned.

(F) Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 to 3 show an example of a Firno molding apparatus according to the present invention. The molding device (lx) of this example includes a heating device 2 that sandwiches and heats the strip-shaped film f, and a molding device 4 provided on the downstream side of the heating device 2 (as viewed in the film transport direction). ing.

The heating device 2 includes a main heating block 21 and a lower heating block 22 arranged above and below the film transport path, respectively.
Fixed rail 3 arranged between two upper and lower heating blocks
0. Upper and lower heating blocks 21 and 22
is vertically movably supported by a known method on a main body (not shown) that can reciprocate at a predetermined pitch P in the transport direction of the film f, and can be moved vertically by a known means such as a cylinder. . Therefore, both the upper and lower heating blocks 21 and 22 can move up and down and can also move back and forth in the direction of transport of the film f.

A plurality of heating convex portions 23 are formed on the lower surface of the main heating block 21 at regular intervals along the longitudinal direction, that is, the moving direction. The main heating block 21 has relatively deep grooves 26 provided at intervals of the movement pitch P, so that the main heating block 21 has a plurality of (three in this embodiment) sections B, B, B, etc. in the film transport direction.
A plurality of (six in this embodiment) heating convex portions 23 are arranged in each section. One or more heaters 27 are provided in each section in the maxillary heating block 21, and the heating convex portions 2 of the heating block are heated by the heaters.
3 can be heated to the desired temperature. The temperature of the heater in each compartment can be controlled for each compartment.

A plurality of heating convex portions 24 are also formed on the upper surface of the mandible heating block 22 at regular intervals along the longitudinal direction, that is, the direction of movement. The lower jaw heating block 22 is also divided into a plurality of sections in the film transport direction by relatively deep grooves 26 provided at intervals of the movement pitch P, and each section has a plurality of (six in this embodiment) heating blocks. A convex portion 24 is arranged. One or more heaters 28 are provided in each section within the mandibular heating block 22, and the heating convex portions 24 of the heating block can be heated to a desired temperature by the heaters. The temperature of the heater in this section can also be controlled for each section.

The fixed rail 30 is fixed to the main body and is configured to reciprocate together with the main body. A plurality of openings 31 having the same shape as the heating convex portions 24 of the lower jaw heating block 22 are formed in the fixed rail 30 at the same intervals as the heating blocks. This opening is such that when the mandibular heating block 22 is raised, the heating convex portion 24 of the heating block enters therein.

As explained above, the heating device 2 of the present invention does not directly contact and heat the film other than the heating convex portions, and there is almost no change in both side edges of the film such as shrinkage or waving due to heating.

The forming device 4 includes a fixed main body 41 disposed below the transfer path of the film f, an upper moving block 42 movably disposed within the main body 41 via a slide rod 43, and an upper movable block 42 disposed above the main body 41. and an upper moving block 51 which is arranged to be movable up and down by a known device such as a cylinder. A molding male mold 44 is attached to the upper surface of the upper moving block 42 , and a plurality of (six in this embodiment) molding convex portions 45 are formed on the molding male mold 44 at intervals between the heating convex portions 24 of the heating block 22 . are formed at the same spacing. A plurality of openings 46 for receiving the heating projections 45 are formed on the upper surface of the main body 41 at the same intervals as the heating projections.

A heater 47 is provided within the upper movement block 42 .

An adjusting device 60 for adjusting the amount of protrusion of the molded convex portion from the upper surface of the main body is attached to the connecting plate 48 attached to the lower end (in FIG. 1) of the slide rod 43 fixed to the upper moving block. As shown in FIG. 4, this protrusion amount adjusting device 60 includes an adjusting screw 61 rotatably attached to the connecting plate 48, and a female screw 6 that receives the adjusting screw 61.
3 is formed on the member 62. The member 62 is configured to be moved up and down by, for example, a piston rod of a cylinder, and the movement is transmitted to the upper movement block 42 via a slide rod. The amount of protrusion of the upper surface of the molding male die 44 from the upper surface of the main body (when the upper moving block is raised) is adjusted by changing the distance between the connecting plate and the member using the protrusion amount adjustment device 60.

The upper moving block 51 can be moved up and down by a known device such as a cylinder, and has a female mold 52 attached to its lower surface. In the female mold 52, a plurality of molding holes 53 (six in this embodiment) and one positioning device, that is, a positioning hole 54 are formed at the same intervals as the molding convex portions 45 of the male mold in the direction of transport of the film f. ing. Each molding hole 53
communicate with each other via a passageway 54 in the upper moving block 51, which passageway 54 has a suction port 55 connected to a vacuum source.
and an air supply port 56 connected to a source of air pressure. Between the suction port 55 and the vacuum source and the air supply port 56
Open/close control valves are provided between the vacuum source and the air pressure source, respectively, so that the passage 54 can be selectively connected to the vacuum source or the air pressure source. The upper moving block 51 is provided with a heater 57 for heating the female mold 52 .

By heating the molding female mold 52 and molding male mold 45 of the molding device so that the temperature can be controlled, molding conditions can be optimally adjusted.

Next, the operation of the above device 1 will be explained. As shown in FIG. 1, the heating device 2 is located at a position R closest to the molding device 4 (indicated by the end of the heating device on the molding device side, hereinafter referred to as the retracted position) and at a distance P from that position on the side opposite to the molding device. It is linearly reciprocated by a pitch P between a position F (hereinafter referred to as the forward position) which is far away from the position F. When the heating device 2 is in the forward position F, the upper jaw heat block 21 is lowered and the lower jaw heat block 22 is raised. Then, a plurality of (six in this embodiment) heating convex portions 2 in the first section B1 of the mandibular heat block 22
4 enters the opening 31 of the fixed rail 30 so that its upper surface, that is, the heating surface, is approximately flush with the upper surface of the fixed rail,
It cooperates with the lower surface, that is, the heating surface, of the plurality of heating convex portions 23 of the first section B1 of the maxillary heat block 21 to sandwich the film f and partially heat the film (the sandwiched portion). Almost at the same time as the upper and lower heating blocks sandwich the film f, the upper and lower heating blocks 21 and 22 and the fixed rail 30 move toward the forming device 4 to position R, and feed the film by a pitch P toward the forming device while heating the film. . When the feeding of one pitch IP of the film is completed, the maxillary heat block 21
After the heating block 22 has been raised and the mandibular heating block 22 has been lowered, the heating device is returned to the forward position F. Thereafter, similar operations are repeated to heat the same area of the film f multiple times (three times in total in this example) using the molding convex portions in the second and third sections B and B.

The film f, which has been partially heated in the area required for molding in this manner, is sent between the male mold 44 and the female mold 52 of the molding device. At this time, due to the fact that the distance between the respective molding convex portions 45 of the male mold 44 is equal to the distance between the respective heating convex portions 23 and 24 of the upper and lower jaw heating blocks, and the positional relationship between the heating device and the molding device. , approximately the center of each heated area of the film is located at the corresponding molding protrusion 4 of the molding male die 44.
It coincides with the center of 5. Thereafter, the upper moving block 42 of the molding device 4 rises, and the upper moving block 51 descends. At about the same time, the suction port 55 is connected to a vacuum source and the inside of each molding hole 53 is evacuated via the passage 54.

Almost simultaneously or immediately after the upper moving block 51 descends and presses the film f against the upper surface of the main body 41 with the female mold 52 and performs preforming by vacuuming the molding hole, the male mold 42 ascends. Each molding convex portion 45 projects upward from the upper surface of the main body 41 and enters the corresponding molding hole 53 of the molding female die 52, and the two cooperate to mold a container, that is, a pocket p on the film f. Upper movable block 5 after film forming
1 is raised and the upper moving block 42 is lowered to wait for the next film advance.

Next, when the heated film is fed by one pitch by the heating device, each heated area of the film is aligned with the corresponding molding convex part 45 as described above, but the rearmost bokeh 1-9 is aligned with the positioning hole. It stops at a position aligned with 54. In this state, the upper moving block 5 is used for forming the next film.
When the female mold 52 is lowered by the lowering of the mold 52, the already molded pocket p enters the positioning hole 54, thereby positioning the film relative to the molding device. Therefore, it is possible to eliminate deviations in the interval between pockets due to the feeding of the film by the reciprocating heating device.

In the above embodiment, the case where the pockets are formed in one row on the film has been described, but the same can be done in the case where the pockets are formed in a plurality of rows. Furthermore, although the film positioning device is configured with a hole for receiving a pocket, a similar positioning projection may be provided on the male mold and the positioning projection may be inserted into the pocket for positioning.

(G) Effects According to the present invention, the following effects can be achieved.

■Since the pockets are positioned using a positioning device, it is possible to eliminate pitch deviations between the pockets.

Furthermore, the positioning device of this embodiment can provide the following effects.

■Since the effective stroke of the molding convex part can be easily adjusted, the molding depth of the pocket can be adjusted freely.

- Preforming is performed by vacuuming, so there is little temperature drop in the film and good molding is possible.

■Since the heating is within the range required for molding, there is little shrinkage in the width direction of the film, and because it is possible to use film with the same dimensions as the product width, there is no loss of film.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view of the molding apparatus of the present invention, and FIG.
FIG. 3 is a cross-sectional view taken along the line ■--■ in FIG. 1, FIG. 4 is a cross-sectional view of the adjusting device. l: Molding device 2: Heating device 21.22: Heating block 4: Molding device 41: Main body 42.51: Movable block 44: Male mold 52: Female mold 54: Positioning device

Claims (1)

[Claims] 1. A film forming method in which only a required area of a strip-shaped film is heated by a linearly reciprocating heating device, and pockets are formed in the film in the heated area. The film is sandwiched by a device and heated in a plurality of regions separated in the longitudinal direction, the pocket is formed in the plurality of heated regions of the film, and the one-time feeding pitch of the film is set in the plurality of regions. A method for forming a film, characterized in that the film is positioned by a rearmost pocket formed in the film, equal to the feed pitch of the sections. 2. Equipped with a heating device that reciprocates linearly and a forming device that molds the film heated by the heating device, the heating device holds the strip-shaped film and heats only the required area, and the heating device In a film forming apparatus for forming pockets on the film by the forming apparatus in the plurality of areas, the moving pitch of the heating apparatus is made equal to the feeding pitch of the plurality of areas, and the forming apparatus has a plurality of pockets heated by the heating apparatus. a number of molding male molds equal to the number of longitudinal zones and molding recesses cooperating with the male molding molds to form the pockets, the molding device having positioners for engaging the pockets and positioning the film; 1. A film forming device characterized by being provided with a device.