JP3595793B2 - Resin sealing device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a resin sealing device that seals a resin with a film interposed therebetween, and particularly to a resin sealing device capable of extending wrinkles of the film.
[0002]
[Prior art]
In recent years, when an IC lead frame or the like is resin-sealed in a sealing cavity of a mold, a film is interposed between a sealing cavity surface side of an upper mold or a lower mold of the mold and a sealing resin. Attention has been paid to a resin sealing device configured as described above (for example, see Japanese Patent Application Laid-Open No. 2000-252311).
[0003]
The reason why the film is interposed between the cavity surface of the mold and the resin is, for example, by interposing the film. 1) When the mold after sealing is separated from the product, a so-called ejector pin is used. It is not necessary to separate the product from the mold forcibly, so the product is not easily damaged. 2) Each product is not clearly separated at the resin encapsulation stage. In the case of sealing and separating by a cutter after sealing, and even in the case where the shape of the sealing portion is frequently changed, the mechanism for moving the eject pin forward and backward is not required. 3) The resin does not adhere to the sealing cavity surface of the mold, so that the maintenance burden of cleaning the cavity surface is reduced, and 4) the peeling process can be simplified. Therefore, advantages such as shortening of the sealing cycle time can be obtained.
[0004]
As the film used for this purpose, fluorine-impregnated glass cloth, polypropylene, polyvinylidene chloride and the like which are excellent in heat resistance are known.
[0005]
FIG. 13 is a side view showing a schematic configuration of a film transport structure in a conventional resin sealing device. In FIG. 13, reference numeral 1 denotes a press for performing resin sealing, 2 denotes an upper mold of a mold, and 3 denotes an upper crown. This resin sealing device Ro is designed to interpose a sealing film F between the sealing cavity surface 2a of the upper mold 2 and a sealing resin (not shown). A film transport structure for supplying the film F to the stop cavity surface 2a is provided.
[0006]
As the film transport structure, a supply roll 5 is disposed in front (left side in the figure) of the press machine 1 and a take-up roll 6 is disposed rearward (right side in the figure), and the supply roll 5 and the take-up roll 6 are indicated by arrows. By rotating the film F in the directions B and C, the film F is intermittently conveyed from the supply roll 5 side to the take-up roll 6 side as shown by an arrow A each time sealing is performed.
[0007]
Reference numerals 7 and 8 denote guide rollers arranged before and after the upper die 2 to guide the film F to a fixed height with respect to the sealing cavity surface 2a of the upper die 2. Reference numeral 9 denotes This is a vacuum mechanism (adsorption mechanism) for adsorbing the film F to the mold immediately before sealing.
[0008]
In the above conventional example, the film is interposed between the cavity surface 2a of the upper mold and the resin. However, depending on the type of sealing, the film may be interposed between the cavity surface of the lower mold (not shown) and the resin. It may be interposed between them. Further, it may be interposed between the resin and the cavity surfaces of both the upper mold and the lower mold.
[0009]
[Problems to be solved by the invention]
By the way, in a resin encapsulation device having this type of film transport structure, wrinkles may occur in the film F due to a slight imbalance in the transport system of the film F. If molding is performed while wrinkles are generated on F, there is a problem that defective products are generated due to scratches on the molded products.
[0010]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a resin sealing device that can prevent a wrinkle from occurring in a film adsorbed on a mold with a relatively simple configuration.
[0011]
[Means for Solving the Problems]
According to the present invention, when a lead frame or the like is resin-sealed in a sealing cavity of a mold, a film is interposed between a sealing cavity surface side of an upper mold or a lower mold of the mold and a sealing resin. A resin sealing device configured to cause the film to be conveyed intermittently at each time of sealing once from the supply roll side to the take-up roll side to guide the conveyance of the film. Among the guide rollers, at least one guide roller arranged near the entrance side or the exit side of the mold can be divided into a plurality of roller pieces in the axial direction. This problem has been solved by making the pair of roller pieces to be able to move away from and approach each other while maintaining the same coaxiality.
[0012]
In the present invention, among the guide rollers for guiding the conveyance of the film, the guide roller near the mold can be divided in the axial direction, and a pair of outer roller members among the divided roller members are separated from each other. As a result, the film can be stretched in the width direction, and the occurrence of wrinkles when the film is attracted to the mold can be prevented.
[0013]
Here, when the guide roller is divided into, for example, two roller pieces, the two roller pieces correspond to “a pair of roller pieces”. When the guide roller is divided into, for example, three or more roller pieces, a pair of roller pieces existing on both sides (outermost in the film width direction) corresponds to a “pair of roller pieces” (described later).
[0014]
The timing at which the separating operation of the pair of roller pieces is performed may be after or after the transport of the film is stopped for each sealing.
[0015]
When the roller pieces are separated from each other with the guide roller stopped, the film is pulled outward in the width direction due to friction between the roller peripheral surface and the film. Since wrinkles can be extended in a state where unnecessary force other than a force in a direction of pulling the film outward is not applied, a possibility that new wrinkles are formed due to separation of the pair of roller pieces can be reduced. In this case, in particular, if the outer diameter of the roller piece in the film width direction is made larger than the center side, wrinkles are gradually eliminated from the center side where the tension (frictional force) is weakly applied, so that a good result is obtained. Can be
[0016]
On the other hand, when the separation of the pair of roller pieces is started immediately before stopping the conveyance of the film, in addition to the pulling action due to the friction between the roller peripheral surface and the film until the film is stopped, the rotation of the roller is also performed. Can be effectively used to pull the film in the width direction. Also in this case, the outer diameter of the roller piece in the film width direction is made larger than the center side, or a spiral that can guide the film from the center in the width direction to the opposite center side on the outer periphery of the roller piece is used. By forming, wrinkles can be more efficiently extended.
[0017]
Further, it is effective that the pair of roller pieces can be independently driven to rotate by a separate driving means. Thereby, even after the stop, the same operation as starting the separation from before the stop described above can be obtained.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0019]
1, 2, and 3 are a side view, a plan view, and a front view, respectively, showing the overall configuration of a resin sealing device to which the present invention is applied. The film transport structure is included in this resin sealing device.
[0020]
In these figures, the resin sealing device R includes a press machine 10 for resin-sealing an IC lead frame or the like. The press machine 10 includes a mold 13 including an upper crown 11, a lower crown (not shown), an upper mold 12, and a lower mold 14.
[0021]
Further, the resin sealing device R adopts a structure in which a sealing film F is interposed between a sealing cavity surface 12a of the upper mold 12 and a sealing resin (not shown). Further, a film transport structure FT for supplying the film F to the sealing cavity surface 12a of the upper mold 12 is provided.
[0022]
The film transport structure FT includes a supply roll 15 and a take-up roll 16 as its central elements. The film F can be intermittently transported from the supply roll 15 side to the take-up roll 16 side for each sealing.
[0023]
In the case of this embodiment, the supply roll 15 and the take-up roll 16 are both disposed on the front side of the press machine 10, and the take-up roll 16 is disposed above the supply roll 15 in parallel with the rotation axis 15 j of the supply roll 15. Are arranged so as to have a suitable rotation axis 16j.
[0024]
As shown in FIG. 3, the supply roll 15 and the take-up roll 16 are held between shafts 27a, 27b or 28a, 28b on both sides in a state of being disposed between both side plates 38a, 38a of a movable frame 38 described later. By driving one of the shafts 27a and 28a using the motors 23 and 25 and the gear sets 24 and 26, the shafts 27a and 28a can be rotated at a predetermined speed. The shafts 27a and 27b or the shafts 28a and 28b are both configured to be able to retreat outward in the axial direction, so that the distance between the shafts 27a and 27b can be increased. When replacing the rolls 15 and 16, the gap between the shafts 27a and 27b or 28a and 28b is increased.
[0025]
Returning to FIG. 1, the film F sent from the supply roll 15 is directed from the front side to the rear side of the press machine 10 by guide rollers 21 a and 21 b and guide rollers 17 and 18 for level adjustment before and after the upper die 12. Transported. The used film F, which has passed through the press machine 10 and has been sent to the rear side (the side opposite to the supply roll), is wound around the upper die 12 and the upper crown 11 by guide rollers 19a, 19b, and 19c. It is configured to return to the side.
[0026]
By the way, when both the supply roll 15 and the take-up roll 16 are arranged on the front side of the press machine 10 as described above, the tip of the new film F sent from the new supply roll 15 is replaced when the rolls 15 and 16 are replaced. It is necessary to route the paper to the take-up roll 16 along the transport path. Therefore, in the resin sealing device R, a chain mechanism 30 that is driven to rotate around is provided so as to automatically perform the operation.
[0027]
The chain mechanism 30 has an endless chain 31 that is arranged so as to be able to circulate along the transport trajectory of the film F from the supply roll 15 to the take-up roll 16. The chain mechanism 30 has a film holding bar 52 attached to the chain 31 and holding the leading end of a new film F sent from the new supply roll 15 in a double-supported state.
[0028]
As shown in FIG. 1, when the film holding bar 52 guides the leading end of a new film F to the vicinity of a new take-up roll 16, the resin sealing device R detects a position of the new film F. It has.
[0029]
Further, in this resin sealing device R, the film transport system (supply roller 15, take-up roller 16, various rollers 21a, 21b, 17, 18, 19a to 19c) and the chain mechanism 30 are shown in FIGS. As shown, it is configured to be mounted on movable frames 38, 39 comprising both side plates 38a, 39a and connecting frames 38b, 39b connecting them. That is, by moving the movable frames 38 and 39 up and down via the cylinders 43 and 44 while being guided by the elevating guides 41 and 42, the film transport mechanism and the chain mechanism 30 and the like are vertically moved integrally with the press machine 10. You can make it.
[0030]
Although not shown, the upper mold 12 is provided with a suction mechanism for sucking the film F toward the upper mold 12 immediately before sealing.
[0031]
Next, characteristic portions of the device of the present embodiment will be described with reference to FIGS.
[0032]
FIGS. 4A and 4B show a mold upper mold 12 and a level adjusting guide roller 17 for supplying the film F to the sealed cavity surface 12a of the upper mold 12 at a predetermined height level. 18A and 18B are a side view and a plan view showing a relationship with the reference numeral 18.
[0033]
In this resin sealing device, of the guide rollers 21a, 21b, 17, 18, 19a to 19c for guiding the conveyance of the film F, the guide roller near the die exit side (the die (the upper die 12) in this embodiment) The guide roller 18 disposed closest to the die (upper die 12) on the exit side of the roller 18 is axially moved by two roller pieces 18L at a position corresponding to the center of the film F in the width direction of the guide roller 18. 18R, and the two roller pieces 18L and 18R can be separated and approached while maintaining coaxiality with each other. In this embodiment, since the guide roller can be divided into the two roller pieces 18L and 18R, the two roller pieces 18L and 18R correspond to "a pair of roller pieces located on both sides" in the present invention. I do.
[0034]
As shown in FIG. 5, the guide roller 18 is divided into a pair of cylindrical roller pieces 18L and 18R at a position 18a corresponding to the center in the width direction of the film F. Each of the roller pieces 18L and 18R is The frame 39 is rotatably mounted on the outer periphery of a fixed shaft 61 having both ends fixed to both side plates 39a. Collars 62 are fitted on the outer periphery of both ends of the fixed shaft 61, and the pair of roller pieces 18L and 18R slide in the axial direction as indicated by an arrow D while maintaining coaxiality within a range limited by the collar 62. I can do it.
[0035]
An annular engaging groove 63 is formed on the outer periphery of a portion of the roller pieces 18L and 18R outside a range where the roller pieces 18L and 18R come into contact with the film F. The engaging groove 63 is formed by a cylinder 65 in the axial direction of the guide roller 18. The tip of the driven hook 64 is engaged. By moving the hook 64 by the cylinder 65, the pair of roller pieces 18L and 18R can be separated from and approach each other in the axial direction.
[0036]
Note that variations in the shape and configuration of the roller pieces 18L and 18R will be described later in detail.
[0037]
Next, the operation of the resin sealing device having the above configuration will be described.
[0038]
This resin sealing device intermittently feeds the film F from the supply roll 15 side to the take-up roll 16 side at each time of resin sealing. After being fed from the supply roll 15, the film F is positioned and stopped at a predetermined position on the sealing cavity surface 12a of the upper mold 12 by guide rollers 21a and 21b and guide rollers 17 and 18 for level adjustment. Is sucked into the upper mold 12 side. Thereafter, resin sealing is performed by the press machine 10, separated from the upper mold 12 again by the guide rollers 17 and 18, and further, by the guide rollers 19a to 19c, the front side of the press machine 10 in a track surrounding the upper mold 12. And wound up by the winding roll 16. During this film feeding, the supply roll 15 rotates in the direction of arrow B, the take-up roll 16 rotates in the direction of arrow C, and the film F moves in the direction of arrow A.
[0039]
In the above operation, before the frames 38 and 39 are lifted and the film F is attracted to the sealing cavity surface 12a of the upper mold 12, the wrinkle removing operation of the film F is performed. That is, after the film F used for the next encapsulation molding is sent directly below the upper mold 12, the conveyance of the film F is stopped. After the conveyance of the film F is stopped, the film F is transferred to the upper mold 12. Before the suction, the pair of roller pieces 18L and 18R are separated from each other.
[0040]
More specifically, the pair of roller pieces 18L and 18R are slid outward in the width direction of the film F by moving the hook 64 by the cylinder 65 in FIG. Then, the film F is stretched in the width direction by being pulled by the pair of roller pieces 18L, 18R due to the friction between the peripheral surfaces of the two divided roller pieces 18L, 18R and the film F, whereby the film F is stretched to the upper mold 12. The generation of wrinkles at the stage of adsorption is prevented.
[0041]
Note that as long as the film F is not actually attracted to the sealing cavity surface 12a of the upper mold 12, it may be before the attracting operation is started or after the attracting operation is started. When the separating operation is performed after the stop, the wrinkles of the film F can be extended in a state where no force other than a force for pulling the film F outward in the width direction acts on the film F. It is possible to prevent a problem that new wrinkles are formed due to the above. In this case, more favorable results can be obtained by using a taper roller piece configuration described later.
[0042]
On the other hand, the separation operation of the pair of roller pieces 18L and 18R may be started immediately before the conveyance operation of the film F is stopped. When the roller pieces 18L and 18R are separated from immediately before the rotation of the guide roller 18 is stopped, the roller pieces 18L and 18R are separated in such a manner that the contact surface between the film F and the roller pieces 18L and 18R always changes until the film F stops. Therefore, it is possible to effectively prevent a situation in which the wrinkles that have been formed up to that time move in parallel while being wound around the roller pieces, and as a result, wrinkles cannot be removed. That is, a favorable effect is obtained in that wrinkles already formed up to that time can be more efficiently removed.
[0043]
Needless to say, a configuration may be employed in which separation is started before the conveyance of the film is stopped, and separation is further continued after the stop.
[0044]
Next, variations of the configuration of “a pair of roller pieces located on both sides” and their respective operations will be described.
[0045]
First, in the above-described embodiment, a mechanism using the cylinder 65, the hook 64, and the like to slide the pair of roller pieces 18L, 18R in the axial direction has been described. However, another drive mechanism may be employed. Good. FIG. 6 is a cross-sectional view showing one example. In this example, the separation and approach of a pair of roller pieces is realized by an air cylinder structure.
[0046]
The guide roller 118 in this mechanism is divided into a pair of roller pieces 118L and 118R in the axial direction, and is rotatably mounted on the outer periphery of the fixed shaft 79. The fixed shaft 79 is supported at both sides by both side plates 39a of the frame 39, and has a large diameter portion 71a at an intermediate portion in the axial direction and small diameter portions 71b at both sides thereof. Further, the roller pieces 118L and 118R are configured as a cylindrical body with an inner peripheral step in which the inner diameter at the center in the width direction of the film F is large and the inner diameter at the opposite center is small.
[0047]
The roller pieces 118L and 118R are attached to the outer periphery of the fixed shaft 71, and the inner periphery of the large diameter portion 72a is slidably fitted to the outer periphery of the large diameter portion 71a of the fixed shaft 71 via an O-ring 73. . The inner circumference of the small diameter portion 72b is slidably fitted to the outer circumference of the small diameter portion 71b of the fixed shaft 71 via an O-ring 74.
[0048]
Thus, a cylinder chamber 75 is defined between the side wall of the small diameter portion 72b of the roller pieces 118L and 118R and the side wall of the large diameter portion 71a of the fixed shaft 71. Air pressure or hydraulic pressure can be introduced into the cylinder chamber 75 through a passage 79 secured inside the fixed shaft 71, so that the roller pieces 118L and 118R can be slid in the directions away from each other. Has become.
[0049]
Here, a collar 77 and a compression spring 78 are fitted around both ends of the fixed shaft 71, and the compression spring 78 is sandwiched between the end wall of the collar 77 and the end walls of the roller pieces 118L and 118R. Thus, the roller pieces 118L and 118R are pressed toward the center in the width direction of the film F. Therefore, by removing the pneumatic or hydraulic pressure introduced into the cylinder chamber 75, the roller pieces 118L and 118R return in a direction approaching each other.
[0050]
As described above, various configurations can be adopted for the driving mechanism of the roller pieces, and the present invention is not particularly limited to a specific configuration of the driving mechanism. Since the resin sealing device usually has a source of air, such a structure using air has an advantage that the manufacturing cost can be reduced.
[0051]
On the other hand, FIG. 7 and subsequent figures show various variations relating to the overall configuration of the guide roller or the pair of rollers. That is, in the above embodiment, the pair of roller pieces 18L, 18R (118L, 118R) use cylindrical rollers having the same outer diameter in the width direction. This is the most basic outer peripheral configuration, and the above-described basic operation can be obtained.
[0052]
However, for example, as shown in FIG. 7, a pair of roller pieces 218L and 218R each use a taper roller in which the diameter on the anti-center side (outside) is gradually larger than the diameter on the center side in the film width direction. You can also.
[0053]
In this way, by adopting a structure in which the roller diameter increases as going outward, a stronger tension (between the roller pieces 218L, 218R and the film F) is applied toward the outer side in the width direction of the film F. As a result, a stronger frictional force can be obtained at the outer side. Therefore, when the roller pieces 218L, 218R are separated from each other, slippage occurs between the roller pieces 218L, 218R and the film F sequentially from the central side having a weak tension, and the formed wrinkles are satisfactorily removed from the film central side. I will be able to go.
[0054]
Further, if the outer diameter is increased in this manner, the wrinkle removing effect can be further increased, particularly when the outer diameter is separated with rotation.
[0055]
As shown in FIG. 8, spiral grooves 319L and 319R are provided on the outer periphery of the roller pieces 318L and 318R so that the film in contact with the roller pieces 318L and 318R can be guided from the center in the width direction to the opposite center. It is also possible to use those formed symmetrically. Even with such a configuration, a tensile force in the width direction can be more effectively applied to the film as the guide roller 318 rotates.
[0056]
The spiral may be constituted by a groove as described above, or may be constituted by a wavy curved line in which a screw thread is crushed. The spirally formed roller pieces 318L and 318R have little effect when they are separated from each other after stopping, but have an effect of preventing wrinkles from occurring during normal conveyance.
[0057]
In addition, the configuration of the taper and the spiral can be used together.
[0058]
Further, in each of the above embodiments, the guide roller is divided into two parts. For example, as shown in FIG. 9, the target guide roller 418 is divided into three roller pieces 418L, 418S, and 418R. You may do so. In this case, two roller pieces corresponding to both sides of the central roller piece 418S correspond to “a pair of roller pieces located on both sides” according to the present invention. Note that the axial lengths of the respective roller pieces 418L, 418S, 418R do not necessarily need to be uniform. You may.
[0059]
When the guide roller 418 is divided into three roller pieces 418L, 418S, 418R, the central roller piece 418S may be slidable in the axial direction, or may not be slidable in the axial direction.
[0060]
If it is slidable in the axial direction, a function of automatically absorbing the imbalance in tension generated when the pair of roller pieces 418L and 418R are separated from each other can be provided. Further, when the configuration is such that it cannot slide in the axial direction, the axial length of the grooves 419L, 419R generated between the roller pieces 418L, 418S, 418R with respect to the separation distance of the pair of roller pieces 418L, 418R. Since it can be halved (compared to the two-split type), the formation of new wrinkles in the film F due to the increase in the size of the grooves 419L and 419R due to separation can be further suppressed.
[0061]
Further, although not shown, in the present invention, for example, the guide roller may be divided into four or more roller pieces.
[0062]
In addition, as a configuration for reducing the influence of the groove generated by the separation of the roller pieces, for example, a configuration as shown in FIGS. In the guide roller 518, the joining portions N of the roller pieces 518L and 518R are formed so as to be intertwined with each other, and a groove is not formed between the roller pieces 518L and 518R even if the gap between the roller pieces 518L and 518R is slightly increased. By using the guide roller 518 having such a configuration, it is possible to suppress the formation of new wrinkles due to the groove at the time of separation.
[0063]
As shown in FIG. 5, a nip roller 68 is provided on the outer periphery of each roller piece, and both ends of the film F are pressed and held on the roller pieces 18L and 18R by the lip roller 68. In order to secure the friction between the pieces 18L, 18R and the film, it is also effective to use a rubber-based material for the surfaces of the roller pieces 18L, 18R.
[0064]
Furthermore, if the roller piece can be independently driven to rotate by a separate driving means (for example, a motor) or the like and can be positively rotated even when the film is stopped, the film slides and rotates while rotating. The effect of pulling is obtained. In this case, in particular, when the guide rollers (17, 18) on both the entrance side and the exit side of the mold are rotated in directions opposite to each other (direction in which the film is pulled in the transport direction), more favorable results are obtained. Is obtained. If the take-up roller and the like are controlled by a servomotor or the like, the film will not be slackened even if such a separately driven configuration is adopted.
[0065]
When the film F on the supply roll 15 runs out during the sealing operation while performing the wrinkle removing operation on the film F, the roll F is replaced with a new roll 15, 16. At this time, the front end of the new film F sent out from the new supply roll 15 is held by the film holding bar 52 of the chain mechanism 30, and the chain 31 is driven to rotate. Then, the leading end of the new film F can be automatically guided to the winding roll 16 along the transport path of the film F. Therefore, the new film F can be transported by connecting the leading end of the film F to the newly-taken take-up roll 16.
[0066]
At the time of replacing the rolls 15 and 16 described above, in the present resin sealing device, both the supply roll 15 and the take-up roll 16 are arranged on the front side of the press machine 10, and the leading end of a new film F is taken up. Since the work of handling the roll 16 can be automatically performed using the chain mechanism 30, there is no need to go around the rear side of the press machine 10 at all. As a result, the work of replacing the rolls 15 and 16 can be performed only by standing in front of the press machine 10, so that work safety and simplification of work can be achieved.
[0067]
Also, even in the case of a resin sealing device having a plurality of presses, there is no need to stop the operation of other presses for exchanging the film of a specific press, which may cause a drop in productivity. Is also gone.
[0068]
In the case of the present invention, it has been confirmed that it is efficient to apply the guide roller to be divided to the guide roller closest to the mold (the guide roller 18 in FIGS. 1 and 4) on the exit side of the mold. ing. However, depending on the design, the present invention is not necessarily limited to this, and the guide roller on the entrance side closest to the mold may be used. Further, as shown in FIG. 12, for example, as shown in FIG. When the guide rollers 17a and 18a for applying tension to secure the frictional force are added, the present invention is applied to the guide roller 18 (or the guide roller 17 on the entry side) on the exit side "second closest" to the mold. Even if is applied, a corresponding effect can be obtained. Of course, the present invention may be applied to a plurality of guide rollers, for example, all of the guide rollers 17, 18, 17a, 18a in FIG.
[0069]
In the above-described embodiment, the case where the film is supplied to the sealing cavity surface 12a of the upper mold 12 is described. Can be taken. That is, the winding roll is disposed below the supply roll so as to have a rotation axis parallel to the rotation axis of the supply roll. The mold 14 is returned to the take-up roll side so as to surround the mold 14. Then, the above-described wrinkle removing function is added to the guide roller near the mold of the lower mold 14.
[0070]
【The invention's effect】
As described above, according to the present invention, the guide roller near the mold is divided in the axial direction so that the "a pair of roller pieces located on both sides" can be separated and approached from each other. By separating the roller pieces from each other in the axial direction, the film can be stretched in the width direction, the occurrence of wrinkles when the film is attracted to the mold can be prevented, and the occurrence of defective products can be prevented. .
[Brief description of the drawings]
FIG. 1 is a side view of a resin sealing device according to an embodiment of the present invention.
FIG. 2 is a plan view of the apparatus.
FIG. 3 is a front view of the device.
4A and 4B are explanatory views of a guide roller 18 which is a characteristic part of the resin sealing device, wherein FIG. 4A is a side view, and FIG.
FIG. 5 is a front view showing a specific example of a mechanism for separating and approaching roller pieces constituting the guide roller.
FIG. 6 is a cross-sectional view showing another specific example of a mechanism for separating and approaching roller pieces constituting the guide roller.
FIG. 7 is a schematic front view showing another example of the guide roller.
FIG. 8 is a schematic front view showing still another example of the guide roller.
FIG. 9 is a schematic front view showing still another example of the guide roller.
FIG. 10 is a schematic front view showing still another example of the guide roller.
11 is a sectional view taken along the line XI-XI in FIG.
FIG. 12 is a side view corresponding to FIG. 4A showing a position of a guide roller to which the present invention is applied;
FIG. 13 is a side view showing a schematic configuration of a conventional resin sealing device.
[Explanation of symbols]
10 ... Press machine
12 ... upper mold
12a: Sealed cavity surface
13 ... Mold
14 ... Lower mold
15 ... Supply roll
15j ... Rotation axis
16 ... Take-up roll
16j: Rotation axis
17, 18, 118, 218, 318, 418 ... guide rollers
18L, 18R, 118L, 118R, 218L, 218R,
318L, 318R, 418L, 418R: Roller piece
319L, 319R ... spiral groove
F… Film

Claims (6)

When a lead frame or the like is resin-sealed in a sealing cavity of a mold, a film is interposed between a sealing cavity surface of an upper mold or a lower mold of the mold and a resin to be sealed. A resin sealing device that intermittently conveys the film from the supply roll side to the take-up roll side for each one-time sealing,
Among the guide rollers for guiding the conveyance of the film, at least one guide roller arranged near the entrance or exit of the mold can be divided into a plurality of roller pieces in the axial direction, and the divided rollers A resin sealing device characterized in that a pair of roller pieces located on both sides of the pieces can be separated and approached while maintaining coaxiality with each other. In claim 1,
The resin sealing apparatus according to claim 1, wherein the separation of the pair of roller pieces is performed after the conveyance of the film is stopped for each time of the sealing. In claim 1,
The resin sealing device according to claim 1, wherein the separation of the pair of roller pieces is started immediately before the conveyance of the film is stopped for each time of the sealing. In any one of claims 1 to 3,
The resin sealing device according to claim 1, wherein the pair of roller pieces are formed to have a larger diameter on the opposite center side than the diameter on the center side in the film width direction. In any one of claims 1 to 3,
On the outer circumference of the pair of roller pieces, spirals capable of guiding the film in contact with itself from the center in the width direction to the opposite center side by rotation of the pair of roller pieces were formed symmetrically. A resin sealing device characterized by the above-mentioned. In any one of claims 1 to 5,
A resin sealing device wherein the pair of roller pieces can be independently driven to rotate by a separate driving means.

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