JPH06104333B2 - Film forming method and apparatus - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method and an apparatus for continuously forming a large number of pockets, which accommodate articles such as electronic parts, into a strip-shaped film.

(B) Prior art When continuously forming a container or pocket for accommodating an article in a strip-shaped film, it is necessary to heat the film to a desired temperature with a heater. The film is sandwiched and heated by a pair of heating plates provided below. Japanese Patent Laid-Open No. 58-60414 discloses a conventional device that heats only the necessary area in accordance with 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 sandwiching a film by a heating plate that reciprocates in the transport direction and simply transferring the film, the first sandwiching surface by the heating plate and the next It is easy to cause misalignment with the clamping surface. Moreover, as described in the above publication, when the heating portion of the film is limited, it becomes difficult to effectively heat only the necessary portion due to the positional deviation.

(C) Problem to be Solved by the Invention The problem to be solved by the present invention is to hold a film by a heating device that intermittently reciprocates, partially heat the film, and form the film at the heated part. In the molding method and apparatus, the deviation of the heating position is prevented.

(D) Means for Solving the Problem The first invention of the present application is configured to linearly reciprocate and is divided into a plurality of sections along the movement direction, and each section is along the movement direction. The strip-shaped film is sandwiched by a heating device having a plurality of heating portions separated from each other,
Moving the heating device while sandwiching the film at a pitch of one section to heat the film multiple times,
In a method of forming a film, wherein a pocket is formed in a heated area of the film by a forming device arranged downstream of the heating device, a plurality of areas of the film heated by the heating portion in one compartment are A positioning device provided in the forming device is engaged with a pocket formed in the rearmost area in the moving direction, thereby positioning the film with respect to the heating device and the forming device.

A second invention of the present application is configured to linearly reciprocate and is divided into a plurality of sections along the moving direction, and a plurality of heating portions separated in each section along the moving direction. And a forming device arranged on the downstream side of the heating device. The heating device is moved forward while sandwiching the film at a pitch of one section to move the film a plurality of times. A film forming apparatus for forming a pocket in an area of the film that is heated by the heating apparatus and formed in one section of the heating apparatus along the moving direction. Molding having a molding female die in which the same number of molding recesses as the plurality of heating portions are formed along the moving direction, and a molding convex portion that cooperates with the molding recesses of the molding female mold to form pockets in the film A molding machine provided with a male mold It is configured to provide a positioning device for positioning with respect to the heating device and molding apparatus pockets engage the film of the formed film by molding device.

A third invention of the present application is adapted to linearly reciprocate and is divided into a plurality of sections along the moving direction, and a plurality of heating portions separated in each section along the moving direction in each section. And a forming device arranged on the downstream side of the heating device. The heating device is moved forward while sandwiching the film at a pitch of one section to move the film a plurality of times. A heating device for forming a pocket in an area of the film heated by the heating device, the heating device comprising an upper heating block and a lower heating block arranged on both sides of the film, The portions are heating protrusions formed on the surfaces of the upper and lower heating blocks that face each other, and move between the lower heating block and the upper heating block in synchronization with the heating block. A rail for guiding the film is arranged to form an opening into which the heating convex portion of the lower heating block is inserted, and the molding device is formed in one section of the heating device along the moving direction. A plurality of heating portions, and a forming female die in which the same number of forming concave portions are formed along the moving direction, and a forming convex portion that cooperates with the forming concave portions of the forming female die to form a pocket in the film. A forming male mold is provided, and the forming device is provided with a positioning device that engages with a pocket of the film formed by the forming device and positions the film with respect to the heating device and the forming device.

(E) Operation In the structure of the second aspect of the invention, while the film is sandwiched by the heating device and moved toward the molding device by the pitch of one section, the film is divided into a plurality of sections in the longitudinal direction of the film. Heated over time. When the heated area reaches the position of the forming device by the movement of the heating device, the forming device forms a plurality of pockets in the film. The formed film is sent by a single feed pump by the next movement of the heating device. When the next heated zone is delivered to the location of the forming machine, that zone will form a pocket in the forming machine, where one of the previously formed pockets will engage the locating device. Is positioned. Further, in the configuration of the third aspect of the invention, the film is heated by the heating device by sandwiching the film between the heating convex portions of the pair of heating blocks.

(F) Example Hereinafter, an example of the present invention will be described with reference to the drawings.

1 to 3 show an embodiment of a film forming apparatus according to the present invention. The molding apparatus 1 of this embodiment includes a heating device 2 for sandwiching and heating a strip-shaped film f, and a molding device 4 provided on the downstream side of the heating device 2 (as viewed in the film transfer direction). There is.

The heating device 2 includes an upper heating block 21 and a lower heating block 22, which are respectively arranged above and below the film transfer path, and a fixed rail 30 which is arranged between the upper and lower two heating blocks. The upper and lower heating blocks 21 and 22 are supported by a main body (not shown) so as to be able to move up and down by a known method so as to be able to reciprocate at a predetermined pitch P in the transfer direction of the film f, and by known means such as a cylinder. It is designed to move up and down. Therefore, both the upper and lower heating blocks 21 and 22 can move up and down and can reciprocate in the transport direction of the film f.

A plurality of heating projections 23 are formed on the lower surface of the upper heating block 21 at regular intervals in the longitudinal direction, that is, the moving direction. The upper heating block 21 is divided into a plurality (three in this embodiment) of sections B ₁ to B ₃ in the film transfer direction by relatively deep grooves 26 provided at intervals of the moving pitch P,
A plurality of (six in this embodiment) heating projections 23 are arranged in each section. One or more heaters 27 are provided for each section in the upper heating block 21, and the heating convex portions 23 of the heating block can be heated to a desired temperature by the heaters. The heater of each section can be temperature-controlled for each section.

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

The fixed rail 30 is fixed to the main body and reciprocates together with the main body. A plurality of openings 31 having the same shape as the heating projections 24 of the lower heating block 22 are formed in the fixed rail 30 at the same intervals as the heating block. This opening is such that when the lower heating block 22 is raised, the heating projections 24 of that heating block enter into it.

As described above, the heating device 2 of the present invention does not directly heat the film except for the heating convex portion to heat the film, and the two side edges of the film hardly shrink or corrugate due to the heating.

The forming device 4 includes a fixed main body 41 arranged below the transfer path of the film f, a lower movable block 42 movably arranged in the main body 41 via a slide rod 43, and a main body 41 on the lower side. An upper movable block 51 is provided so as to be vertically movable by a known device such as a cylinder. Lower movable block 42
A molding male die 44 is attached to the upper surface of the
In this case, a plurality of (6 in this embodiment) forming protrusions 45 are formed at the same intervals as the intervals between the heating protrusions 24 of the heating block 22. The upper surface of the main body 41 has a plurality of openings 46 for receiving the heating projections 45.
Are formed at the same intervals as the heating projections. A heater 47 is provided in the lower movable block 42.

An adjusting device 60 for adjusting the protrusion amount of the molding 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 lower movable block. As shown in FIG. 4, the protrusion amount adjusting device 60 includes an adjusting screw 61 rotatably attached to the connecting plate 48 and a member 62 having a female screw 63 for receiving the adjusting screw 61. ing. The member 62 is vertically moved by, for example, a piston rod of a cylinder, and transmits the movement to the lower movable 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 lower movable block is raised) is adjusted by changing the distance between the connecting plate and the member by the protrusion amount adjusting device 60.

The upper movable block 51 can be moved up and down by a known device such as a cylinder, and a molding female die 52 is attached to the lower surface thereof. A plurality of female molds 52 (6 in this embodiment)
Individual molding holes 53 and one positioning device, that is, the positioning holes 54, are formed in the transfer direction of the film f in the molding convex portion 45 of the molding male mold.
Are formed at the same intervals as. Each molding hole 53 communicates with each other through a passage 54 in the upper movable block 51, and the passage 54 communicates with a suction port 55 connected to a vacuum source and an air supply port 56 connected to an air pressure source. . An opening / closing control valve is provided between the suction port 55 and the vacuum source and between the air supply port 56 and the air pressure source so that the passage 54 and the vacuum source or the air pressure source can be selectively connected. Has become. The upper movable block 51 has a heater 57 for heating the molding female die 52.
Is provided.

The molding conditions can be optimally adjusted by heating the molding female mold 52 and the molding male mold 45 of the molding device to control the temperature.

Next, the operation of the device 1 will be described. As shown in FIG. 1, the heating device 2 has a position R closest to the molding device 4 (shown by the end of the heating device on the molding device side and hereinafter referred to as a retracted position) and 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 a forward position) which is separated from the position F. When the heating device 2 is in the forward position F, the upper heating block 21 is lowered and the lower heating block 22 is raised. Then, a plurality (six in this embodiment) of heating projections 24 in the first section B ₁ of the lower heating block 22 enter the openings 31 of the fixed rail 30, and the upper surface thereof, that is, the heating surface is almost the upper surface of the fixed rail. It becomes the same plane and the upper heating block
In cooperation with the lower surface, that is, the heating surface, of the plurality of heating convex portions 23 of the first section B ₁ of 21, the film f is sandwiched and the film is partially (sandwiched) heated. When the film f is sandwiched between the upper and lower heating blocks, the upper and lower heating blocks 21 are almost at the same time.
22 and the fixed rail 30 move toward the position R in the direction of the molding apparatus 4 and feed the film by the pitch P toward the molding apparatus while heating the film. When the feed of one pitch 1P of film is completed, the upper heating block 21 is raised and the lower heating block 22 is
After is lowered, the heating device is returned to the forward position F. After that, the same operation is repeated to heat the same area of the film f a plurality of times (three times in total in this embodiment) by the molding projections in the _second and _third sections B ₂ and B ₃ .

In this way, the film f, in which the area required for molding is partially heated, is sent between the molding male die 44 and the molding female die 52 of the molding apparatus. At this time, the distance between the respective molding convex portions 45 of the molding male die 44 is equal to the distance between the respective heating convex portions 23 and 24 of the lower heating block and the positional relationship between the heating device and the molding device. The center of each heated area of the film coincides with the center of the corresponding forming projection 45 of the forming male die 44. Then, the lower movable block 42 of the molding apparatus 4 rises and the upper movable block 51 descends. Almost at the same time, the suction port 55 was connected to the vacuum source, and the inside of each molding hole 53 had a passage 54.
Is evacuated through. The upper movable block 51 descends to press the film f against the upper surface of the main body 41 by the forming female die 52 and perform preforming by evacuation of the forming hole. At the same time or shortly thereafter, the forming male die 42 rises. Each molding convex portion 45 projects upward from the upper surface of the main body 41, enters into the corresponding molding hole 53 of the female molding die 52, and cooperates with each other to mold the container or pocket p on the film f. After the film is formed, the upper movable block 51 moves up and the lower movable block 42 moves down to wait for the next film to be fed.

Next, when the film heated by the heating device is fed by one pitch, each heated area of the film is aligned with the corresponding forming convex portion 45 as described above, but the pocket P at the rearmost portion is aligned with the positioning hole 54. Stop at the aligned position. In this state, when the molding die 52 is lowered by lowering the upper movable block 51 for molding the next film, the pocket p which has already been molded enters into the positioning hole 54 to position the film with respect to the molding device. Therefore, it is possible to eliminate the gap between the pockets due to the film feeding by the reciprocating heating device.

In the above embodiment, the case where the pockets are formed in the film in one row has been described, but the case where the pockets are formed in a plurality of rows can be similarly performed. Further, the film positioning device is constituted by the holes for receiving the pockets, but the molding protrusions may be provided on the molding male mold with the same positioning protrusions, and the positioning protrusions may be put in the pockets for positioning.

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

Since the pockets are positioned by the positioning device, the pitch deviation between the pockets can be eliminated.

Further, the positioning device of this embodiment can achieve the following effects.

Since the effective stroke of the forming protrusion can be easily adjusted, the forming depth of the pocket can be adjusted freely.

Since preforming is performed by vacuuming, the temperature of the film does not drop and good forming is possible.

Since the heating is within the range required for molding, the shrinkage in the width direction of the film is small, and since the film having the same dimension as the product width can be used, there is no loss of the film.

[Brief description of drawings]

FIG. 1 is a schematic sectional view of a molding apparatus of the present invention, and FIG.
FIG. 3 is a sectional view taken along line II-II in the figure, and FIG. 3 is line I in FIG.
A sectional view taken along line II-III, and FIG. 4 is a sectional view of the adjusting device. 1: Molding device 2: Heating device 21, 22: Heating block 4: Molding device 41: Main body, 42, 51: Movable block 44: Molding male mold, 52: Molding female mold 54: Positioning device

Claims (3)

[Claims] 1. A heating device which is linearly reciprocally movable and is divided into a plurality of sections along the moving direction, and each section has a plurality of heating portions which are separated from each other along the moving direction. A strip-shaped film is sandwiched by the heating device, and the heating device is moved while sandwiching the film at a pitch of one section to heat the film for a plurality of times, and the molding is arranged downstream of the heating device A method for forming a film, wherein a pocket is formed in a heated area of the film by an apparatus, wherein a pocket is formed in a rearmost area of the moving direction among a plurality of areas of the film heated by the heating portion in one section. Forming of a film characterized in that the pocket is engaged with a positioning device provided in the forming device, thereby positioning the film with respect to the heating device and the forming device. Method. 2. A heating device which is linearly reciprocated and is divided into a plurality of sections along the movement direction, and each section has a plurality of heating portions separated from each other along the movement direction. And a forming device arranged on the downstream side of the heating device, wherein the heating device is moved forward while sandwiching the film at a pitch of one section to heat the film over a plurality of times, A film forming apparatus for forming pockets in an area of the film heated by the heating apparatus, wherein the forming apparatus has a plurality of heating portions formed in one section of the heating apparatus along the moving direction. A molding female die having the same number of molding concave portions formed along the moving direction, and a molding male die having a molding convex portion that forms a pocket in the film in cooperation with the molding concave portion of the molding female die. The molding device is provided with Molding apparatus of the film, characterized in that the pocket engages the film of the formed film provided with a positioning device for positioning with respect to the heating device and the molding device by device. 3. A heating device which is linearly reciprocated and is divided into a plurality of sections along the movement direction, and each section has a plurality of heating portions separated from each other along the movement direction. And a forming device arranged on the downstream side of the heating device, wherein the heating device is moved forward while sandwiching the film at a pitch of one section to heat the film over a plurality of times, In a film forming apparatus for forming pockets in an area of the film heated by the heating device, the heating device comprises an upper heating block and a lower heating block disposed on both sides of the film, the heating portion including an upper heating block and a lower heating block. The heating projections are formed on the surfaces of the lower heating block that face each other. The heating projections move between the lower heating block and the upper heating block in synchronization with the heating block. An inner rail is arranged to form an opening into which the heating convex portion of the lower heating block is inserted, and the molding device has a plurality of openings formed in one section of the heating device along the moving direction. Forming male part having the same number of forming concave parts as the heating portion of the forming part along the moving direction, and a forming convex part forming a pocket in the film in cooperation with the forming concave part of the forming female mold. A mold is provided, and the forming device is provided with a positioning device that engages with a pocket of the film formed by the forming device to position the film with respect to the heating device and the forming device. apparatus.