JP2008049578A - Resin molding apparatus and resin molding method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a resin molding apparatus which does not need a complicated driving mechanism and a control mechanism, is compact and simple in structure, has a short resin molding cycle, and is high in productivity. <P>SOLUTION: The apparatus is composed of an upper and lower molds 30 and 20 which mold a resin molding 60 between joining surfaces and in which engagement grooves 33 and 21c are formed in the joining surfaces, molding ejecting shafts 42 which engage with the engagement grooves and in which notches 42a are formed at positions crossing the molding 60, and pins 27 and 28 which are arranged to be able to eject the shafts 42 into the upper and lower molds 30 and 20 with the engagement grooves 33 and 21c formed. The shafts 42 are ejected from the engagement grooves 33 and 21c by the pins 27 and 28, and the molding 60 is separated from the joining surfaces of the opened upper and lower molds 30 and 20. The shafts 42 are slid in the axial direction, and the molding 60 is carried outside from between the upper and lower molds 30 and 20. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a resin molding apparatus, and more particularly to a small resin molding apparatus with a simple structure of a resin molded product take-out apparatus and high productivity.

Conventionally, as a method of taking out a resin molded product from a mold of a resin molding apparatus, for example, there is a method of using a molded product taking out robot.
That is, the molded product take-out robot 4 has an arm 83 provided with a hand 84. When the resin molding is completed and the upper and lower molds are opened, the arm 84 advances between the upper and lower molds, and the hand 83 grabs the resin molded product and takes it out between the upper and lower molds (Patent Document). 1).
JP-A-5-084790

  However, since the resin molding apparatus described above requires a resin molded product take-out robot in order to take out the resin molded product, a complicated drive mechanism and control mechanism are required. In addition, since a space where the robot arm can advance is required between the upper and lower molds, the resin molding apparatus becomes complicated and large. Furthermore, since it is necessary to open the upper and lower molds while operating and controlling the robot, there are problems that the resin molding cycle time is long and the productivity is low.

  In view of the above problems, the present invention provides a resin molding apparatus and a resin molding method that do not require a complicated drive mechanism and control mechanism, have a simple and small apparatus, have a short resin molding cycle time, and have high productivity. The task is to do.

  In order to solve the above problems, a resin molding apparatus according to the present invention molds a resin molded product between bonded surfaces that are clamped and bonded, and an upper mold that is provided with a fitting groove on at least one surface of the bonded surface; A molded product take-out shaft that engages with the lower mold, fits in the fitting groove, and has an engaging portion formed at a position intersecting the resin molded product, and the molded product take-out shaft can be protruded from the fitting groove. And the shaft for ejecting the molded product is projected from the fitting groove with the shaft ejector pin, and the resin molded product is separated from the joint surface of the upper mold and the lower mold that are opened, and The molded product take-out shaft is slid in the axial direction to convey the resin molded product from between the upper mold and the lower mold to the outside.

  According to the present invention, there is no need for a robot arm to be inserted between the joint surfaces of the upper mold and the lower mold that are opened as in the conventional example, so that a complicated drive mechanism and control mechanism are not required, and it is simple and compact. A resin molding apparatus is obtained. In addition, there is no need to take in and out the robot arm, and no large work space for inserting the robot arm is required, so the mold opening time can be shortened, the resin molding cycle time can be shortened, and high productivity resin. A molding apparatus is obtained.

As an embodiment according to the present invention, a shaft for taking out a molded product may be slidably inserted into a through hole provided in at least one free end portion of the shaft ejector pin. Further, the molded product takeout shaft may be slidably engaged with an engagement receiving portion provided at at least one free end of the shaft ejector pin.
According to this embodiment, the shaft slides reliably and quickly through the through hole provided in the free end portion of the shaft ejector pin or the engagement receiving portion, and the resin molded product can be conveyed to the outside. For this reason, a robotic arm that is simple, small, and highly productive can be obtained without requiring a robot arm as in the prior art.

As other embodiment concerning this invention, you may form an engaging part in the position which cross | intersects a runner among the shafts for taking out a molded article. As an engaging part formed in the shaft for taking out a molded product, a slit formed by cutting out the surface of the shaft, an engaging claw part protruding from the surface of the shaft, or an engaging concave part may be used.
According to this embodiment, the resin molded product can be quickly and reliably conveyed via the engaging portion provided on the molded product take-out shaft, and the reliability and productivity are improved. In particular, since the engaging portion may be a slit, an engaging claw portion, or an engaging concave portion, it is possible to freely select according to the shape, number of pieces, arrangement, etc. of the molded product, and the freedom of selection expands. Thus, a highly versatile resin molding apparatus can be obtained.

  In order to solve the above problems, the resin molding method according to the present invention molds a resin molded product between the joint surfaces obtained by clamping the upper mold and the lower mold and joining them, and fitting provided on at least one side of the joint surfaces. A molded product take-out shaft having an engagement portion formed at a position intersecting the resin molded product is fitted in the groove, and then the molded product is taken out between the joint surfaces of the upper mold and the lower mold which are opened. After the shaft is ejected from the fitting groove with a shaft ejector pin and the resin molded product is separated from the joint surface which has been opened, the shaft for removing the molded product is slid in the axial direction, and the upper die and the lower die are moved. It consists of a process of conveying the resin molded product from between molds to the outside.

  According to the present invention, it is not necessary to insert a robot arm after the upper and lower molds are opened, so that complicated drive mechanisms and control mechanisms are not required, and processing can be performed with a simple and small resin molding apparatus. In addition, the time for inserting and removing the robot arm is not required, and a large work space for inserting the robot arm is not required. Therefore, the mold opening time and consequently the resin molding cycle time can be shortened, and the resin molding with high productivity. A method is obtained.

As an embodiment according to the present invention, a resin molded product is conveyed from between an upper mold and a lower mold to the outside, and after separating the resin molded product from the molded product extraction shaft, the molded product extraction shaft is A step of sliding the upper mold and the lower mold at the same time as the mold closing operation and returning to the original position may be performed.
According to this embodiment, since the molded product take-out shaft is returned to the original position simultaneously with the mold closing, there is an effect that the resin molding time can be further shortened.

An embodiment according to the present invention will be described with reference to the accompanying drawings of FIGS.
The resin molding apparatus 10 according to the first embodiment, as shown in FIGS. 1 to 17, is supported so as to be movable up and down via the lower mold 20 disposed so as to be surrounded by four tie bars 11. The upper mold 30 is disposed on the lower surface of the movable platen 12 so as to face the lower mold 20. An injection cylinder 14 having an injection nozzle 13 is disposed above the movable platen 12. Further, as shown in FIG. 2, the resin molding apparatus 10 has a molded product take-out device 40 including a shaft drive device 41 and a molded product mounting table 50 which are arranged on the same straight line with the lower mold 20 in between. is doing. In addition, although the shaft drive device 41 is provided on the right side of the lower mold 20 on the upstream side, it can also be provided on the left side of the molded product mounting table 50, that is, on the downstream side.

  As shown in FIGS. 2 and 15 to 17, the lower mold 20 has a cavity 21 a and a runner 21 b formed on the upper surface of the lower mold 21, and a molded product take-out shaft 42 described later is fitted therein. A fitting groove 21c is formed. And the upper end part of the shaft ejector pins 27 and 28 mentioned later is arrange | positioned so that it may protrude from the said fitting groove 21c.

  Further, as shown in FIG. 15, the lower mold 20 is arranged so that the first and second ejector plates 24 and 25 can be moved up and down via a guide rod 23 provided between the lower mold 21 and the base plate 22. It is. A lower end portion of a molded product ejector pin 26 is supported on the first ejector plate 24 made of two plate-like materials. Further, the lower end portion of the shaft ejector pin 27 is supported on the second ejector plate 25 made of two plate-like materials. The molded product ejector pin 26 and the shaft ejector pin 27 are respectively inserted in the lower mold 21 so as to be slidable up and down, and the upper end portions thereof can protrude from the lower mold 21. Further, a stopper bolt 29 having a lower end portion fixed to the second ejector plate 25 is slidably inserted through the center portion of the stopper bolt 29 and the upper end portion of the stopper bolt 29 has a bowl shape. It is retaining. The first ejector plate 24 is urged upward by the spring force of the coil spring 29a inserted through the stopper bolt 29. Further, the ejector cylinder 22a is disposed so as to push up the second ejector plate 25 upward.

  As shown in FIG. 17, the upper die 30 has a cavity 31 and a runner 32 formed on the lower surface thereof, a fitting groove 33 that fits into a molded product take-out shaft 42 described later, and a shaft ejector pin. Relief recesses 34 corresponding to the upper end portions of 27 are respectively formed.

  As shown in FIG. 1, the shaft drive device 41 of the molded product take-out device 40 drives the molded product take-out shaft 42 so as to reciprocate in the axial direction. Therefore, a slide base 45 is slidably mounted on a guide shaft 44 that is horizontally supported at both ends on the mounting plate 43, and a support base 46 having a substantially L-shaped cross section is fixed to the slide base 45. . Then, one end of the molded product take-out shaft 42 is fixed to a slide block 47 that can slide up and down along the inner side surface of the support base 46.

  The molded product take-out shaft 42 is assembled such that its free end is slidable along the fitting groove 21c groove of the lower mold 20. In particular, in FIG. 2, of the shaft ejector pins 27 and 28 assembled to the lower mold 21, the molded product extraction shaft 42 slides into the through hole 27 a of the shaft ejector pin 27 located on the shaft drive device 41 side. It is inserted through as possible (FIG. 8). On the other hand, the molded product take-out shaft 42 is slidably supported on the upper end portion of the shaft ejector pin 28 located on the molded product mounting table 50 side (FIG. 10). Further, the molded product take-out shaft 42 is provided with a drop-off preventing slit 42a in a part of its upper surface (FIG. 8).

  As shown in FIG. 1, the molded product mounting table 50 is for separating and holding the resin molded product 60 from the molded product take-out shaft 42. For this reason, the support base 52 is erected in parallel along both side edges of the upper surface of the support plate 51 supported so as to be movable up and down, and a plurality of positioning pins 53 are arranged at a predetermined pitch on the upper end surface of the support base 52. Projected.

Next, the molding process of the resin molding apparatus having the above-described configuration will be described.
First, the movable platen 12 is lowered along the tie bar 11 via a drive mechanism (not shown), the molded product take-out shaft 42 is fitted into the fitting grooves 21c and 33, and the upper mold 30 and the lower mold 20 are molded. Close it. Then, after connecting the injection nozzle 13 of the injection cylinder 14 to a resin injection port (not shown) of the movable platen 12, resin is filled into the cavities 21 a and 31 via the runner 32, and the cavity portion 61 and the runner portion 62 are filled. A resin molded product 60 is formed (FIGS. 3, 9, and 15).

  Next, the movable platen 12 and the injection cylinder 14 are raised simultaneously, and then the ejector cylinder 22a is driven to raise the first ejector plate 24 and the second ejector plate 25, and the slide block 47 of the molded product take-out device 40. Also increases. When the mold opening amount of the upper mold 30 reaches a predetermined height, the first ejector plate 24 comes into contact with the lower surface of the lower mold 21, and the movement of the first ejector plate 24 stops (FIG. 16). In the above process, when the movable platen 12 and the injection cylinder 14 are raised, the runner 21b has an undercut shape (not shown), so the resin molded product 60 remains in the lower mold 21. Then, when the first ejector plate 24 and the second ejector plate 25 are raised, the resin molded product 60 is separated from the lower mold 21.

  Further, when the movable platen 12 and the injection cylinder 14 are raised and the upper die 30 is opened, the ejector cylinder 22a also pushes up the second ejector plate 25. For this reason, the second ejector plate 25 rises until it abuts on the first ejector plate 24, and only the shaft ejector pin 27 fixed to the second ejector plate 25 rises. Therefore, the resin molded product 60 is removed from the molded product ejector pin 26. Pull apart. Therefore, the resin molded product 60 is completely separated from the molded product ejector pin 26 (FIGS. 4, 10, 14, and 17). Thus, since the molded product ejector pin 26 and the resin molded product 60 are separated from each other, there is no interference when the resin molded product 60 is conveyed to the outside.

  Then, a driving air cylinder (not shown) of the shaft driving device 41 is driven to slide the slide base 45 along the guide shaft 44. As a result, the molded product take-out shaft 42 supported by the shaft ejector pin 27 slides in the axial direction, and the resin molded product 60 is conveyed to the molded product mounting table 50 and positioned.

  In the present embodiment, since the resin material enters and solidifies into the slit 42a provided on the upper surface of the molded product take-out shaft 42, the resin molded product is moved when the molded product take-out shaft 42 slides in the axial direction. There is an advantage of preventing 60 from falling off. The slit 42a may have any shape as long as it separates the resin molded product 60 from the upper mold 30 and prevents the resin molded product 60 from falling off.

  Further, by lowering the ejector cylinder 22a, the molded product ejector pin 26 and the shaft ejector pin 27 are pulled in, and the slide block 47 is lowered along the support base 46, and the molded product removal shaft 42 is inserted into the fitting groove 21c. Mating. Accordingly, the runner portion 62 of the resin molded product 60 is locked between the positioning pins 53 of the molded product mounting table 50, and the resin molded product 60 is separated from the molded product take-out shaft 42 to support the molded product mounting table 50. The resin molded product 60 is placed on the table 52 (FIGS. 11, 12, and 13).

  Next, the air cylinder of the shaft driving device 41 is driven to pull back the slide base 45 along the guide shaft 44, thereby returning the molded product taking-out shaft 42 to the original position along the fitting groove 21c. The upper mold 30 and the lower mold 20 are closed by lowering 12 and the injection cylinder 14, and the same molding operation as described above is performed.

  As another operation mode, the molded product taking-out shaft 42 may be pulled back almost simultaneously with the lowering of the movable platen 12 and the injection cylinder 14. As described above, the resin molding time can be further shortened by simultaneously performing the returning operation of the molded product taking-out shaft 42 while lowering the movable platen 12. This is because the molded product take-out shaft 42 can be accurately positioned by providing the fitting groove 21c into which the molded product take-out shaft 42 is fitted on the joint surface to be joined by mold closing.

  According to the present embodiment, the molded product extraction shaft 42 reciprocates between the upper mold 30 and the lower mold 20 to convey the resin molded product 60. Therefore, there is an advantage that the robot arm as in the conventional example is not required, the apparatus is simple and small, and the productivity is improved.

The second embodiment is applied to a transfer resin molding apparatus as shown in FIGS.
That is, the transfer resin molding apparatus includes a lower mold 70 supported so as to be movable up and down, and an upper mold 80 that is fixedly supported and disposed so as to face the lower mold 70.

  The lower mold 70 forms a pot 72 that can store a tablet (not shown) in the center of a lower cavity bar 71 on which a substrate 90 to be sealed with resin is placed, and pressurizes and melts the tablet with a plunger chip 73. It can be done.

  The upper mold 80 is provided with a cull 82 at a position corresponding to the pot on the lower surface of the upper cavity bar 81 provided on the lower surface. A cavity 84 is formed through a runner 83 that communicates with the cull 82. Further, a plurality of shaft ejector pins 85 are slidably inserted into the upper mold 80. And, at the lower end of the shaft ejector pin 85, a molded product taking-out shaft 86 having a deformed cross section supported so as to be slidable along the lower surface of the upper mold 80 is assembled. The molded product take-out shaft 86 is provided with an engaging recess 86a at a position intersecting the runner 83 (FIG. 18B).

Next, an operation process of the transfer resin molding apparatus according to the second embodiment will be described.
That is, the substrate 90 on which the electronic component 91 to be sealed with resin is mounted is positioned on the lower cavity bar 71 of the lower mold 70 and a tablet (not shown) is stored in the pot 72. Then, by closing the upper mold 80 and the lower mold 70, the substrate 90 is sandwiched between the lower cavity bar 71 and the upper cavity bar 81. Next, the tablet housed in the pot 72 is heated and pressurized by the plunger tip 73 to melt, and filled into the cavity 84 from the cull 82 through the runner 83 (FIG. 18A). Therefore, the engaging recess 86 a provided in the molded product take-out shaft 86 is engaged with the runner portion 93 of the resin molded product 92, and the electronic component 91 mounted on the substrate 90 is placed in the cavity portion 94 of the resin molded product 92. (FIG. 19).

  Next, as shown in FIG. 19, when the lower mold 70 is lowered and the mold is opened, the shaft ejector pin 85 follows and descends. Further, when the lower mold 70 is lowered beyond a predetermined position, the lowering of the shaft ejector pin 85 is stopped, and the resin molded product 92 integrated with the substrate 90 is separated from the lower mold 70. In this case, since the engaging recess 86a of the molded product take-out shaft 86 is engaged with the runner portion 93 of the resin molded product 92, the resin-sealed substrate 90 does not fall off.

  Further, as in the first embodiment, the molded product take-out shaft 86 is slid to the back side in the direction perpendicular to the paper surface of FIG. Transported between the bars 71 and 81 to the outside. Next, after holding the outer edge portion of the substrate 90 with a jig (not shown), the shaft ejector pin 85 is raised and the runner portion 93 is removed from the engaging recess 86a. Then, the substrate 90 resin-sealed with the jig (not shown) is moved to a predetermined position. Meanwhile, another substrate 90 on which the electronic component 91 is mounted on the lower mold 70 is positioned, and the tablet is stored in the pot 72. Then, the shaft 86 is returned to the original position, and thereafter, the same operation as described above is repeated to perform the resin sealing operation.

  Since the thermosetting resin used in the transfer molding described above generally has high adhesion, it firmly adheres to the molded product take-out shaft 86 via the engaging recess 86a. For this reason, the resin molded product can be taken out quickly, and the production cycle time can be shortened. Further, the mold opening amount at the time of taking out the molded product may be an amount that can secure a working space in which the resin molded product and the molded product take-out shaft can move. For this reason, there is an advantage that the working space becomes smaller than the conventional example in which the arm of the robot is inserted, and the apparatus can be downsized.

  In the second embodiment, the case of using the molded product take-out shaft 86 having a deformed cross section has been described. However, the molded product take-out shaft according to the first embodiment is arranged in the lower mold of the second embodiment to lift the substrate. It may be conveyed.

  In the above-described embodiment, the air cylinder is used to drive the molded product take-out shaft. However, the present invention is not limited to this, and a hydraulic cylinder, a ball screw, or the like may be used, and there is no particular limitation. .

  The molded product take-out shaft only needs to be engaged with any one of the resin molded products, and may be directly engaged with the runner portion, the cull portion, or the cavity portion of the resin molded product, or extended therefrom. It may be engaged with the existing part.

  Furthermore, the cross-sectional shape of the slit formed in the molded product take-out shaft is not particularly limited. For example, if the cross-sectional shape is widening at the end, there is an advantage that dropping can be prevented more reliably.

  Next, the shaft ejector pin or the molded product take-out shaft is not limited to a circular cross section, but may be a square shape or an irregular shape.

  The resin molding apparatus according to the present invention has been described with respect to injection molding and transfer molding, but may be applied to other types of resin molding apparatuses.

It is a front view which shows 1st Embodiment of the resin molding apparatus which concerns on this invention. It is a top view which shows the lower mold | type of the resin molding apparatus shown in FIG. It is a fragmentary sectional front view for demonstrating operation | movement of the resin molding apparatus shown in FIG. It is a front view for demonstrating operation | movement of the resin molding apparatus following FIG. It is a front view for demonstrating operation | movement of the resin molding apparatus following FIG. It is a front view for demonstrating operation | movement of the resin molding apparatus following FIG. It is a front view for demonstrating operation | movement of the resin molding apparatus following FIG. It is the sectional view on the AA line of FIG. 2 for demonstrating operation | movement of the resin molding apparatus shown in FIG. It is an AA line sectional view for explaining operation of a resin molding device following Drawing 8. FIG. 10 is a cross-sectional view taken along line AA for explaining the operation of the resin molding apparatus following FIG. 9. It is a side view for demonstrating the separation process of a resin molded product. It is a side view for demonstrating the isolation | separation process following FIG. It is a side view for demonstrating the isolation | separation process following FIG. FIGS. A and B are a partially enlarged view of FIG. 4 and a cross-sectional view taken along line BB of FIG. 14A. It is the sectional view on the AA line of FIG. 2 for demonstrating operation | movement of the resin molding apparatus shown in FIG. It is the sectional view on the AA line of FIG. 2 for demonstrating operation | movement of the resin molding apparatus following FIG. It is the sectional view on the AA line of FIG. 2 for demonstrating operation | movement of the resin molding apparatus following FIG. FIG. A and FIG. B are a partially enlarged sectional view showing a second embodiment of the resin molding apparatus according to the present invention, and a sectional view taken along line BB in FIG. It is a partial expanded sectional view for demonstrating operation | movement of the resin molding apparatus following FIG. 18A. FIG. 20 is a partial enlarged cross-sectional view for explaining the operation of the resin molding apparatus following FIG. 19.

Explanation of symbols

10: Resin molding device 11: Tie bar 12: Movable platen 13: Injection nozzle 14: Injection cylinder 20: Lower mold 21: Lower mold 21a: Cavity 21b: Runner 21c: Fitting groove 26: Ejector pin 27, 28: Molded product ejector pin Shaft ejector pin 27a: Through hole 30: Upper die 31: Cavity 32: Runner 33: Fitting groove 40: Molded product take-out device 41: Shaft drive device 42: Shaft for taking out the molded product 42a: Slit 50: Molded product placing table 60 : Resin molded product 61: Cavity part 62: Runner part 70: Lower mold 71: Lower cavity bar 72: Pot 73: Plunger tip 80: Upper mold 81: Upper cavity bar 82: Cal 83: Runner 84: Cavity 85: Shaft ejector Pin 86: Shaft for taking out molded product 86a: Engaging recess 90: Substrate 91: Electronic component 92: Resin molded product 93: Runner part 94: Cavity part

Claims (9)

  While molding a resin molded product between the joint surfaces joined by clamping, the upper mold and the lower mold provided with a fitting groove on at least one side of the joining surface, and fitting into the fitting groove, the resin A molded product take-out shaft in which an engaging portion is formed at a position intersecting with the molded product, and a shaft ejector pin arranged so that the molded product take-out shaft can be protruded from the fitting groove. The product ejecting shaft is projected by the shaft ejector pin, and the resin molded product is separated from the joint surface of the upper mold and the lower mold which are opened, and the molded product ejecting shaft is slid in the axial direction, A resin molding apparatus for transporting the resin molded product from between the upper mold and the lower mold to the outside.   2. The resin molding apparatus according to claim 1, wherein a molded product take-out shaft is slidably inserted into a through-hole provided in at least one free end of the shaft ejector pin.   2. The resin molding apparatus according to claim 1, wherein a molded product take-out shaft is slidably engaged with an engagement receiving portion provided at at least one free end of the shaft ejector pin.   The resin molding apparatus according to any one of claims 1 to 3, wherein an engagement portion is formed at a position intersecting the runner in the molded product take-out shaft.   The resin molding apparatus according to any one of claims 1 to 4, wherein the engaging portion formed on the molded product extraction shaft is a slit formed by cutting out the surface of the shaft.   The resin molding apparatus according to any one of claims 1 to 5, wherein the engaging portion formed on the shaft for taking out the molded product is an engaging claw protruding from the surface of the shaft.   The resin molding apparatus according to any one of claims 1 to 6, wherein the engaging portion formed on the molded product taking-out shaft is an engaging concave portion formed on the surface of the shaft.   A resin molded product is molded between the joint surfaces obtained by clamping the upper mold and the lower mold and joined, and an engagement portion is provided at a position intersecting the resin molded product in a fitting groove provided on at least one side of the joint surface. Then, the molded product take-out shaft was fitted, and then the molded product take-out shaft was projected from the fitting groove with the shaft ejector pin between the joint surfaces of the upper mold and the lower mold, and the mold was opened. After the resin molded product is separated from the joint surface, the molded product take-out shaft is slid in the axial direction, and the resin molded product is conveyed from between the upper mold and the lower mold to the outside. A resin molding method. After the resin molded product is transferred from between the upper mold and the lower mold to the outside, and the resin molded product is separated from the molded product take-out shaft, the upper mold and the lower mold are closed with the mold take-out shaft. The resin molding method according to claim 8, wherein the resin is slid and returned to the original position simultaneously.

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