JPH0919958A - Film forming apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inexpensively mold an embossed carrier tape which is used for receiving and supplying small-sized electronic parts. SOLUTION: By making constitution in which a belt-shaped film 1 which is wound onto a reel is molded by a molding part consisting of an upper molding mold 4 in which the preliminary molded punch 6 of a spherical end part and the molded punch 7 of an end part of a desired shape are integrated freely slidably and a lower molding mold 11 which is located opposite to the upper mold 4 and has a preliminary molded recession 9 and a molded recession 10, adequate molding depth and uniform thickness are secured, a receiving part 10a which is strong and hardly deformed is obtained, and a film forming apparatus can be provided which does not need a heater and a temperature control mechanism and is of low equipment costs.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film forming apparatus for processing and manufacturing an embossed carrier tape used for housing and supplying small electronic parts.

[0002]

2. Description of the Related Art In a conventional film forming apparatus of this type, as shown in the conceptual diagram of FIG. 8, a band-shaped film 1 wound around a supply roller 2 is a feed roller driven by a drive unit (not shown). 3 has a heater 23 built therein and a lower heating portion 22 formed in the same manner as the upper heating portion 21 having a convex portion on the lower surface.
Is intermittently conveyed at a constant pitch interval into the space, and a portion required for forming the storage portion 28a by embossing is heated. The heated film 1 is further moved at a constant pitch interval in the arrow direction by the feed roller 3. By an upper molding die 24 having a molding punch 27 provided via a control spring 26 on the block 25 for regulation and sliding, and a lower molding die 29 having a molding recess 28 facing the molding punch 27. The embossed portion 28a is formed by pressing,
Such a one-step press molding allows the storage unit 2 to have a desired shape.
8a.

[0003]

However, in the above-mentioned conventional structure, the upper heating portion 21 and the lower heating portion 22 are formed in order to heat and mold the portion of the film 1 necessary for molding the housing portion 28a. Since a temperature control unit (not shown) of the heater 23 built in these is required, there is a problem that equipment cost increases. Also, the heater 2
When the film 1 is formed at room temperature without using 3, the forming punch 27 is formed as shown in FIGS. 9 (a) and 9 (b).
Since only the volume portion A corresponding to the clearance between the tip end portion 27a and the molding concave portion 28 is substantially extended, the thickness T1 of the molding side surface portion of the storage portion 28a is 1/4 of the thickness T of the film 1 as shown in FIG. It is thinned to about 1 / 5th, the drawing depth is shallow, that is, the forming depth H is limited, only about 8 times the thickness T can be obtained, and the strength of the finished molded product is weak and easy to deform. There was a problem such as.

The present invention is intended to solve such a conventional problem, and an object thereof is to provide a film forming apparatus which has a low equipment cost and can obtain a finished molded product having excellent strength.

[0005]

In order to solve the above-mentioned problems, the film forming apparatus according to the present invention has a structure in which two-step forming for preforming a spherical shape and forming a finished shape are simultaneously performed at room temperature. is there.

[0006]

With this structure, since the portion corresponding to the volume portion extended by molding can be enlarged, the wall thickness of the molded product can be kept sufficiently thick and uniform, and the molding depth can be sufficiently deep. Molding of finished molded products with excellent strength is possible at low equipment cost.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A film forming apparatus according to an embodiment of the present invention will be described below with reference to the drawings. It should be noted that parts having the same configurations as the parts described in the above-mentioned conventional example will be described by giving the same reference numerals.

FIG. 1 is a conceptual diagram showing the construction of the film forming apparatus in the embodiment, showing the state of the top dead center position at the start of the forming process, and FIG. 2 and FIG.
The molding state at the top dead center position and the same bottom dead center position in the state of being conveyed by the pitch is shown.

In FIG. 1, 1 is a continuous strip-shaped film made of a resin material such as polypropylene or polystyrene wound around a rotatable supply roller 2 and 3 is driven in the direction of the arrow by a drive unit (not shown). The feed rollers 4 for conveying the film 1 at a constant pitch are upper molds, and the upper mold 4 has a preforming punch 6 for preforming in which the tip portion is formed into a spherical shape, and the tip portion is a finished product. A molding punch 7 for complete molding formed in a shape is incorporated. Reference numeral 5 is a block that slidably holds the preforming punch 6 and the forming punch 7 via a control spring 8. Reference numeral 11 denotes a lower forming die. The lower forming die 11 is provided with a preforming concave portion 9 having a spherical shape hole facing the preforming punch 6 and a forming concave portion 10 having a completed shape hole facing the forming punch 7 on an upper surface portion. Has been. Reference numeral 9a denotes a pre-processed portion formed on the film 1 by the spherical preforming punch 6 and the preforming recess 9 of the upper forming die 4 and the lower forming die 11, and 10a denotes an embossing formed by the forming punch 7 and the forming recess 10. Is the completed storage unit.

Next, the operation of the film forming apparatus of the present invention constructed as described above will be described in sequence. First, the film 1 is conveyed in the direction of the arrow from the position of the top dead center of FIG. 1 by the feed roller 3 in the direction of the prescribed pitch to the position shown in FIG. 2, and then, as shown in FIG. (Not shown) lowers the upper molding die 4 and the opposing lower molding die 11 to mold the film 1, then raises the upper molding die 4 and lowers the lower molding die 11 to the original position (Fig. 1 to the top dead center position) to store the storage portion 10a and the preliminary processing portion 9
a is formed.

4 (a) and 4 (b) show the upper mold 4
Shows a state in which the lower molding die 11 rises and comes into contact with the place where the storage portion 10a of the film 1 is molded between the tip portion 6a of the preforming punch 6 and the preforming recess 9 of the lower molding die 11. Where T is the thickness of the film 1, B is the volume corresponding to the volume A of the conventional example, and FIG.
4 is a partially enlarged view of the preforming process in FIG.
And the lower forming die 11 completes the ascent (bottom dead center position), the forming depth H1 of the spherical shape is 70 to 80% of the completed forming depth H2 shown in FIG. 6, and the tip of the preforming punch 6 is The gap between the portion 6a and the preforming recessed portion 9 shows a state in which the preprocessed portion 9a formed as the dimension of the thickness T of the film 1 is formed, and FIG. 6 is a partially enlarged view of the completed forming step in FIG. Lowering of the upper molding die 4 and lower molding die 1
1 has been completed, the depth H2 of the accommodating portion 10a is about 10 times the thickness T of the film 1 and the forming punch 7 is formed by the forming recess 10 of the lower forming die 11 facing the tip portion 7a of the forming punch 7. The gap between the front end portion 7a and the molding recess 10 is shown in a state of being formed in the final finished shape of the storage portion 10a, which is molded to the molding thickness T2 having a dimension of 35 to 55% of the thickness T of the film 1. The embossed carrier tape having the accommodating portions 10a having a constant pitch interval is formed by repeating the above process operation with the same molding pressure and molding speed without changing from the conventional example.

FIG. 7 is a partial perspective view showing an example in which a product is inserted into an embossed carrier tape formed by the film forming apparatus of the present invention. 1 is a film, 31 is a feed hole,
32 is a top tape, 33 is a storage part, and 34 is an electronic component.

Although the upper mold 4 and the lower mold 11 are both movable in this embodiment, only one of them may be movable, or the film 1 may be movable in combination. However, it is possible to take multiple pieces by increasing the required number of preforming punches 6 and forming punches 7, preforming recesses 9 and forming recesses 10. It is also possible to make the embossed shape.

[0014]

As described above, in the film forming apparatus according to the present invention, in order to increase the volume part of the film stretched by forming, two steps of spherical shape preforming and finished shape forming are performed simultaneously and at room temperature. By adopting a configuration in which molding is performed without changing the molding pressure or slowing the molding speed, it is possible to secure a large volume part of the film that will be the storage part, so that the wall thickness of the molding part can be kept uniform and the molding depth Can be made about 12 times as thick as the film thickness, the thickness of the finished product of the storage part does not become thin, and the strength of the product is strong and it is difficult to deform, and the heater for heating and the temperature control mechanism. It is possible to realize a film forming apparatus which does not require the above and has a low equipment cost.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of a main part showing a top dead center position of a film forming apparatus according to an embodiment of the present invention.

FIG. 2 is a conceptual diagram of a main part showing a 1-pitch transport position of the film.

FIG. 3 is a conceptual diagram of an essential part showing the bottom dead center position of the same.

FIG. 4A is an enlarged view of a main part showing a film forming start state in the same embodiment. FIG. 4B is a perspective view of a main part showing a forming volume part of the film.

FIG. 5 is an enlarged view of an essential part showing a forming state in the film preforming step.

FIG. 6 is an enlarged view of a main part showing a molding state in the film completion molding process.

FIG. 7 is a perspective view of essential parts showing an example in which a product is inserted into the embossed carrier tape obtained in the same example.

FIG. 8 is a conceptual diagram of a main part showing a conventional film forming apparatus.

FIG. 9A is an enlarged view of a main part showing a film forming start state of a conventional film forming apparatus. FIG. 9B is a perspective view of a main part showing a forming volume part of the film.

FIG. 10 is an enlarged view of a main part showing a completed cross section of a conventional film forming apparatus after forming.

[Explanation of symbols]

 1 Film 2 Supply Roller 3 Feed Roller 4 Upper Forming Die 6 Preforming Punch 7 Forming Punch 8 Spring 9 Preforming Recess 9a Pre-Processing Part 10 Forming Recess 10a Storage 11 Lower Forming Die

Claims (1)

[Claims] 1. A supply unit in which a strip-shaped film is wound on a reel, a transport unit for transporting the strip-shaped film supplied from the supply unit, a preforming punch having a spherical tip and a tip having a desired shape. A vertically movable molding upper die in which each of the molding punches is slidably incorporated, and a vertically movable molding lower die that is provided with a spherical concave portion and a desired shape concave portion and faces the above molding upper die. A film forming apparatus comprising a forming unit which is arranged in a conveying path of a conveying unit and forms a storage unit having a desired shape at regular intervals.