Resin-sealed mold

Abstract

To provide a resin encapsulation mold capable of easily adjusting a timing at which a movable pin closes a channel of an air vent.SOLUTION: A resin encapsulation mold includes: an air vent having a channel for releasing air inside a cavity to an outside; and an air vent opening / closing unit that moves toward the air vent and closes the channel of the air vent. The air vent opening / closing unit includes: a movable pin that blocks the channel of the air vent; a biasing member that biases the movable pin toward the air vent; a position adjusting member that contacts the movable pin biased by the biasing member and adjusts the position of the movable pin in a biasing direction, which is the direction in which the biasing member biases; and a housing member that accommodates a base end of the movable pin located upstream in the biasing direction, the biasing member, and the position adjusting member, with a tip of the movable pin located downstream in the biasing direction protruding toward the air vent.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The disclosed embodiments relate to resin-sealing molds.

Background Art

[0002] Conventionally, in a resin-sealing mold, in order to prevent resin from leaking from an air vent having a flow path for discharging the air inside the cavity to the outside, a movable pin that moves in and out of the flow path of the air vent to switch the opening / closing state of the air vent has been used (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a resin-sealing mold having a plurality of cavities, the timing at which the cavity is filled with resin may be different for each cavity. In this case, it is necessary to make the timing at which the movable pin advances into the air vent different between the cavities so that it coincides with the timing at which the resin reaches the air vent. Further, when a plurality of air vents are provided for the same cavity, the timing at which the resin reaches the air vent may be different for each air vent. Even in such a case, it is necessary to make the timing at which the movable pin advances into the air vent different between the air vents.

[0005] However, in order to make the timing at which the movable pin advances into the air vent different, it is necessary to adjust the length of the movable pin, and there is a problem that such adjustment is complicated.

[0006] One aspect of the embodiment is made in view of the above, and an object thereof is to provide a resin-sealing mold capable of easily adjusting the timing at which the movable pin closes the flow path of the air vent.

Means for Solving the Problems

[0007] The resin-sealing mold according to one aspect of the embodiment includes an air vent having a flow path for discharging the air inside the cavity to the outside, and an air vent opening / closing unit that moves toward the air vent and closes the flow path of the air vent. The air vent opening / closing unit includes a movable pin that closes the flow path of the air vent, a biasing member that biases the movable pin toward the air vent, a position adjusting member that contacts the movable pin biased by the biasing member and adjusts the position of the movable pin in the biasing direction, which is the direction in which the biasing member biases, and a housing member that houses the base end portion of the movable pin located upstream in the biasing direction, the biasing member, and the position adjusting member in a state where the tip portion of the movable pin located downstream in the biasing direction protrudes toward the air vent.

Effects of the Invention

[0008] According to one aspect of the embodiment, the timing at which the movable pin closes the flow path of the air vent can be easily adjusted.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

[0010] Hereinafter, with reference to the accompanying drawings, embodiments of the resin sealing mold disclosed in the present application will be described in detail. Note that the present invention is not limited by the embodiments shown below.

[0011] <1. Embodiment 1> <1.1. Configuration of Resin Sealing Mold> As shown in FIG. 1, the resin sealing mold 1 according to Embodiment 1 includes a lower mold 2, an upper mold 3, and an ejector unit 4. In FIG. 1, although not hatched, a part is shown in cross section. The resin sealing mold 1 is controlled by a control device (not shown).

[0012] A pot 20 into which a resin tablet (not shown) formed in a cylindrical shape is inserted is formed in the lower mold 2, and a plunger 6 is disposed in the pot 20. The plunger 6 pressurizes the sealing resin 7 in the pot 20 and sends it to a cavity 13 described later. The sealing resin 7 is a resin obtained by melting a resin tablet with a heating device (not shown) installed in the resin sealing mold 1.

[0013] A cal runner recess 31, a gate recess 32, a cavity recess 33, an air vent recess 34, etc. are formed in the upper mold 3. The cal runner recess 31 extends in the right direction in FIG. 1 from a position corresponding to the pot 20 of the lower mold 2. The cavity recess 33 is formed, for example, in a rectangular shape in plan view. The gate recess 32 is formed between the cal runner recess 31 and the cavity recess 33. The air vent recess 34 is formed continuously with the cavity recess 33.

[0014] In the resin sealing mold 1, by mating the lower mold 2 and the upper mold 3, a cal 10 (see FIG. 3), a runner 11 (see FIG. 3), a gate 12 (see FIG. 3), a cavity 13, an air vent 14, etc. are formed.

[0015] Specifically, the cal runner recess 31 and the substrate 8 disposed on the upper surface 21 of the lower mold 2 form the cal 10 (see FIG. 3) and the runner 11 (see FIG. 3), and the gate recess 32 and the upper surface 21 of the lower mold 2 form the gate 12 (see FIG. 3). Further, the cavity recess 33 and the substrate 8 disposed on the upper surface 21 of the lower mold 2 form the cavity 13, and the vent recess 34 and the substrate 8 disposed on the upper surface 21 of the lower mold 2 form the vent 14.

[0016] The encapsulating resin 7 supplied from the pot 20 to the cal 10 (see FIG. 3) and the runner 11 (see FIG. 3) flows into the cavity 13 through the gate 12 (see FIG. 3) that functions as a resin injection port. Before the lower mold 2 and the upper mold 3 are aligned, a substrate 8, which is an example of a material to be encapsulated, is supplied into the cavity 13, and the encapsulating resin 7 is supplied onto the substrate 8. The vent 14 has a flow path 141 for discharging the air inside the cavity 13 to the outside when the encapsulating resin 7 flows into the cavity 13.

[0017] The ejecting unit 4 is connected to the upper mold 3 and separates the resin-sealed molded product formed by connecting unnecessary resins by the runner 11 (see FIG. 3), the gate 12 (see FIG. 3), etc. from the upper mold 3 after the resin-sealing molding is performed in the resin-sealing mold 1. As shown in FIG. 1, the ejecting unit 4 includes an ejecting plate 41, a fixing pin 42, an ejecting spring 43, a return pin 44, a collar 45, and an ejecting pin 46.

[0018] The ejector plate 41 and the fixing pin 42 are connected by an ejector spring 43, and the ejector plate 41 is biased downward in FIG. 1 via the fixing pin 42 by the ejector spring 43. The return pin 44 is attached to the ejector plate 41 and contacts the upper surface 21 of the lower mold 2 when the lower mold 2 and the upper mold 3 are mated. The collar 45 contacts the upper surface 36 of the upper mold 3, and the positional relationship between the upper mold 3 and the fixing pin 42 is determined by such a collar 45. When the upper mold 3 and the lower mold 2 are separated after the resin sealing molding is performed, the ejector plate 41 is biased downward by the ejector spring 43, and the ejector pin 46 attached to the ejector plate 41 enters the cavity 13 and presses the resin sealing molded product, thereby separating the resin sealing molded product from the upper mold 3.

[0019] In the resin sealing mold 1, when producing a resin sealing molded product, if the flow path 141 of the air vent 14 is open, the sealing resin 7 that has entered the cavity 13 leaks to the outside through the flow path 141 of the air vent 14. Therefore, the resin sealing mold 1 includes an air vent opening / closing unit 5 that moves toward the air vent 14 to close the flow path 141 of the air vent 14 when producing a resin sealing molded product.

[0020] The air vent opening / closing unit 5 includes a movable pin 53 for closing the flow path 141 of the air vent 14, a biasing member 54 that biases the movable pin 53 in the direction toward the lower mold 2, and a position adjusting member 55 that adjusts the position of the movable pin 53 in the biasing direction of the biasing member 54.

[0021] When manufacturing a resin-sealed molded product, the air vent opening / closing unit 5 is pushed in a direction approaching the lower mold 2 by a drive mechanism (not shown), which is a drive source different from the drive source for aligning the lower mold 2 and the upper mold 3. As a result, the movable pin 53 enters the air vent 14. Thereby, the flow path 141 of the air vent 14 is blocked by the movable pin 53. The air vent opening / closing unit 5 is connected to the upper mold 3 via a spring 56. When the pressing force from the drive mechanism (not shown) is released, the air vent opening / closing unit 5 moves in a direction away from the lower mold 2 by the spring 56. Thereby, the movable pin 53 separates from the flow path 141 of the air vent 14, and the flow path 141 of the air vent 14 is opened. The drive mechanism (not shown) is controlled by a control device (not shown).

[0022] In the example shown in FIG. 1, the air vent opening / closing unit 5 is disposed at a position closer to the upper mold 3 than the ejecting unit 4, but the present invention is not limited to such an example. For example, as shown in FIG. 2, the air vent opening / closing unit 5 may be disposed at a position farther from the upper mold 3 than the ejecting unit 4.

[0023] <1.2. Relationship between the cavity 13, the air vent 14, and the movable pin 53> Here, the relationship between the cavity 13, the air vent 14, and the movable pin 53 in the resin-sealing mold 1 will be described. The sealing resin 7 flows into the cavity 13 shown in FIG. 3 from two calipers 10 via four runners 11. Three air vents 14 are connected to such a cavity 13, and when manufacturing a resin-sealed molded product, the air in the cavity 13 is discharged from these three air vents 14. The movable pin 53 is provided corresponding to each air vent 14.

[0024] The sealing resin 7 that flows into the cavity 13 through the gate 10 and the runner 11 reaches different positions in the cavity 13 at different times. In the example shown in FIG. 3, the arrival time of the sealing resin 7 at the regions near the upper and lower ends in FIG. 3 is earlier than the arrival time of the sealing resin 7 at the region near the center in FIG. 3. Therefore, the arrival time of the sealing resin 7 at the vent 14 arranged in the region near the upper and lower ends in FIG. 3 is earlier than the arrival time of the sealing resin 7 at the vent 14 arranged in the region near the center in FIG. 3.

[0025] Therefore, in order to block the flow path 141 of the vent 14 by the movable pin 53 at the timing when the sealing resin 7 reaches the vent 14, it is necessary to block the flow path 141 of the vent 14 arranged in the region near the upper and lower ends in FIG. 3 with the movable pin 53 earlier than the flow path 141 of the vent 14 arranged in the region near the center in FIG. 3. Therefore, the resin sealing mold 1 according to Embodiment 1 has a position adjusting member 55. Such a position adjusting member 55 is a member that contacts the movable pin 53 biased by the biasing member 54 and adjusts the position of the movable pin 53 in the biasing direction, which is the direction in which the biasing member 54 biases. By changing the position adjusting member 55 to a position adjusting member 55 having different lengths in the vertical direction in FIG. 1, the timing at which the movable pin 53 blocks the flow path 141 of the vent 14 can be easily adjusted for each movable pin 53.

[0026] The relationship among the cavity 13, the vent 14, and the movable pin 53 in the resin sealing mold 1 is not limited to the example shown in FIG. 3. For example, in the example shown in FIG. 4, the sealing resin 7 flows into three cavities 13 through three runners 11 from one gate 10, but the arrival time of the sealing resin 7 at the vent 14 arranged in the central cavity 13 in FIG. 4 is shorter than the arrival time of the sealing resin 7 at the vents 14 arranged in the upper and lower cavities 13 in FIG. 4.

[0027] Also, in the example shown in FIG. 5, the sealing resin 7 flows from the sprue 10 into the four cavities 13 through the four runners 11. However, the arrival time of the sealing resin 7 at the vent 14 disposed in the upper two cavities 13 in FIG. 5 is shorter than the arrival time of the sealing resin 7 at the vent 14 disposed in the lower two cavities 13 in FIG. 5.

[0028] Also, in the example shown in FIG. 6, the sealing resin 7 flows from each sprue 10 into different cavities 13 through different runners 11. However, the arrival time of the sealing resin 7 at the vent 14 disposed in the lower and central cavities 13 in FIG. 6 is shorter than the arrival time of the sealing resin 7 at the vent 14 disposed in the upper cavity 13 in FIG. 6.

[0029] Thus, due to the relationship between the cavity 13, the vent 14, and the movable pin 53, the arrival time of the sealing resin 7 at the vent 14 disposed in the cavity 13 is different, and the time for the sealing resin 7 to reach each vent 14 is different. Also in this case, by changing the position adjusting member 55 to a position adjusting member 55 having different lengths in the vertical direction in FIG. 1, the timing at which the movable pin 53 closes the flow path 141 of the vent 14 can be easily adjusted for each movable pin 53.

[0030] <1.3. Configuration of Vent Opening and Closing Unit 5> Hereinafter, the configuration of the vent opening and closing unit 5 will be described in more detail. As shown in FIG. 7, the vent opening and closing unit 5 includes a housing member 50, a plurality of movable pins 53, a plurality of biasing members 54, and a plurality of position adjusting members 55. Note that in FIG. 7, the lower mold 2, the ejector unit 4, etc. are not shown. Also, in FIG. 7, although not hatched, a part is shown in cross section.

[0031] The set of the movable pin 53, the biasing member 54, and the position adjusting member 55 is provided in the same number as the number of the air vents 14. In FIG. 7, two sets of the movable pin 53, the biasing member 54, and the position adjusting member 55 are shown, but in the air vent opening / closing unit 5, the set of the movable pin 53, the biasing member 54, and the position adjusting member 55 may be one or three or more.

[0032] The housing member 50 includes a first plate 51 and a second plate 52, and the first plate 51 and the second plate 52 are fastened by a fastener such as a screw or a bolt (not shown). A plurality of recesses 511 and a plurality of through holes 512 are formed in the first plate 51. The set of the recess 511 and the through hole 512 is provided for each movable pin 53. The corresponding movable pin 53 among the plurality of movable pins 53 is inserted into each through hole 512.

[0033] In the internal space 513 surrounded by the recess 511 of the first plate 51 and the lower surface 521 of the second plate 52, the base end portion 531 of the movable pin 53, the biasing member 54, and the position adjusting member 55 are accommodated. In the air vent opening / closing unit 5, the movable pin 53 has a tip portion 532 located downstream in the direction toward the air vent 14 protruding toward the air vent 14, and a base end portion 531 located upstream in the direction toward the air vent 14 is accommodated in the internal space 513.

[0034] When manufacturing the resin-sealed molded product, the air vent opening / closing unit 5 is pushed in the direction approaching the lower mold 2 from a drive mechanism (not shown), and the tip portion 532 of the movable pin 53 enters the air vent 14 and contacts the substrate 8. As a result, the flow path 141 of the air vent 14 is blocked by the tip portion 532 of the movable pin 53. Therefore, the sealing resin 7 is suppressed from flowing out to the outside through the flow path 141 of the air vent 14.

[0035] In addition, when a resin-sealed molded product in which the air vent 14 does not face the substrate 8 in the vertical direction in FIG. 7 is produced by the resin-sealing mold 1, the tip portion 532 of the movable pin 53 contacts the upper surface 21 of the lower mold 2, so that the flow path 141 of the air vent 14 is blocked by the tip portion 532 of the movable pin 53.

[0036] The biasing member 54 biases the movable pin 53 in the direction toward the air vent 14. That is, the biasing direction in which the biasing member 54 biases the movable pin 53 is the direction toward the air vent 14, which is the downward direction in FIG. 7. The biasing member 54 is, for example, a spring such as a compression spring or a leaf spring, but it suffices as long as it can bias the movable pin 53 toward the air vent 14, and it may be, for example, an elastic resin or rubber.

[0037] When the movable pin 53 contacts the substrate 8, the movable pin 53 is pushed by the substrate 8, so that it moves in the direction opposite to the biasing direction, which is the direction in which the biasing member 54 biases the movable pin 53. As a result, it is possible to prevent the movable pin 53 from being pushed too much against the substrate 8 or the upper surface 21 of the lower mold 2 and too much force from being applied to the movable pin 53.

[0038] The position adjusting member 55 is, for example, a cylindrical metal member and is also called a collar. The movable pin 53 is inserted into the hollow portion of such a position adjusting member 55. Such a position adjusting member 55 abuts against the head portion 5311 provided at the base end portion 531 of the movable pin 53 biased by the biasing member 54. The position of the movable pin 53 in the biasing direction of the biasing member 54, before the flow path 141 of the air vent 14 is blocked, can be changed by the length of the position adjusting member 55 in the vertical direction in FIG. 7.

[0039] In addition, the position adjusting member 55 only needs to be configured to be able to adjust the position of the movable pin 53 in the biasing direction of the biasing member 54, and is not limited to a cylindrical metal member. For example, the position adjusting member 55 may be a semi-cylindrical metal member, or may be a cylindrical or semi-cylindrical resin member. Further, the shape of the position adjusting member 55 is not limited to a cylindrical or semi-cylindrical shape.

[0040] In the example shown in FIG. 7, the vertical length in FIG. 7 is different for each position adjusting member 55. As a result, the timing at which the movable pin 53 closes the flow path 141 of the air vent 14 varies for each movable pin 53. In this way, by changing the vertical length of the position adjusting member 55 in FIG. 7 for each set of the movable pin 53 and the position adjusting member 55, the timing at which the movable pin 53 closes the flow path 141 of the air vent 14 can be easily changed for each movable pin 53.

[0041] The position adjusting member 55 is replaceable by releasing the fastening between the first plate 51 and the second plate 52 and separating the second plate 52 from the first plate 51. Thereby, in the resin sealing mold 1, for example, even when the arrival time of the sealing resin 7 at the air vent 14 changes depending on the heating conditions of the lower mold 2, the heating conditions of the upper mold 3, the material of the sealing resin 7, etc., by replacing the position adjusting member 55, the timing at which the movable pin 53 closes the flow path 141 of the air vent 14 can be easily changed for each movable pin 53.

[0042] <1.4. Operation of the air vent opening / closing unit 5> Next, the operation of the air vent opening / closing unit 5 will be described. In the following, two position adjusting members 55 having different lengths in the biasing direction of the movable pin 53 by the biasing member 54 will be described as an example. Hereinafter, the length of the position adjusting member 55 in the biasing direction of the movable pin 53 by the biasing member 54 may be referred to as the height of the position adjusting member 55.

[0043] As shown in FIG. 8(a), in a state where the air vent opening / closing unit 5 is not pressed in a direction toward the upper mold 3 by a driving mechanism (not shown), the head 5311 of each of the two movable pins 53 is biased downward in FIG. 8(a) by the corresponding biasing member 54 among the two biasing members 54.

[0044] The height of the left position adjusting member 55 in FIG. 8(a) is lower than the height of the right position adjusting member 55 in FIG. 8(a). Therefore, among the two movable pins 53, the left movable pin 53 in FIG. 8(a) is closer to the air vent 14 than the right movable pin 53 in FIG. 8(a).

[0045] Thereafter, the air vent opening / closing unit 5 is pressed by a drive mechanism (not shown) and moves downward in FIG. 8. As shown in FIG. 8(b), among the two movable pins 53, the left movable pin 53 in FIG. 8(b) closes the flow path 141 of the air vent 14 first.

[0046] Thereafter, when the air vent opening / closing unit 5 is further pressed by a drive mechanism (not shown) and moves downward, as shown in FIG. 8(c), among the two movable pins 53, the right movable pin 53 in FIG. 8(c) closes the flow path 141 of the air vent 14. Also, among the two movable pins 53, the left movable pin 53 in FIG. 8(c) is in a state of being pressed by the substrate 8 while closing the flow path 141 of the air vent 14, so it moves in a direction opposite to the biasing direction, which is the direction in which it is biased by the biasing member 54.

[0047] In this way, by adjusting the height of the position adjusting member 55, the air vent opening / closing unit 5 can easily adjust the timing at which the movable pin 53 closes the flow path 141 of the air vent 14.

[0048] As described above, the resin-sealing mold 1 according to Embodiment 1 includes an air vent 14 having a flow path 141 for discharging the air inside the cavity 13 to the outside, and an air vent opening / closing unit 5 that moves toward the air vent 14 and closes the flow path 141 of the air vent 14. The air vent opening / closing unit 5 includes a movable pin 53 that closes the flow path 141 of the air vent 14, a biasing member 54 that biases the movable pin 53 toward the air vent 14, a position adjusting member 55 that contacts the movable pin 53 biased by the biasing member 54 and adjusts the position of the movable pin 53 in the biasing direction, which is the direction in which the biasing member 54 biases, and a housing member 50 that houses the base end portion 531, the biasing member 54, and the position adjusting member 55 of the movable pin 53 in a state where the tip end portion 532 located downstream in the biasing direction of the movable pin 53 protrudes toward the air vent 14. Thereby, in the resin-sealing mold 1 according to Embodiment 1, the timing at which the movable pin 53 closes the flow path 141 of the air vent 14 can be easily adjusted.

[0049] Further, the air vent opening / closing unit 5 includes a plurality of sets of the movable pin 53 and the position adjusting member 55. The position of the movable pin 53 in the biasing direction adjusted by the position adjusting member 55 is different for each set. Thereby, in the resin-sealing mold 1, the timing at which the movable pin 53 closes the flow path 141 of the air vent 14 can be changed for each movable pin 53.

[0050] <2. Embodiment 2> The resin-sealing mold according to Embodiment 2 is different from the resin-sealing mold according to Embodiment 1 in that the air vent opening / closing unit includes a support member attached to the housing member to support the biasing member. In the following, components having the same functions as those in Embodiment 1 are denoted by the same reference numerals and the description thereof is omitted, and the description will be centered on the points different from the resin-sealing mold 1 of Embodiment 1.

[0051] As shown in Fig. 9, the air vent opening / closing unit 5A of the resin-sealing mold 1A according to Embodiment 2 includes a housing member 50A, a plurality of movable pins 53, a plurality of biasing members 54, a plurality of position adjusting members 55, and a plurality of support members 57. In Fig. 9, the lower mold 2, the ejecting unit 4, etc. are not shown. Also, in Fig. 9, although hatching is not applied, a part is shown in cross section.

[0052] The sets of the movable pins 53, the biasing members 54, the position adjusting members 55, and the support members 57 are provided in the same number as the number of the air vents 14. In Fig. 9, the sets of the biasing members 54, the position adjusting members 55, and the support members 57 show two sets of the air vents 14, but in the air vent opening / closing unit 5A, the sets of the biasing members 54, the position adjusting members 55, and the support members 57 may be one or three or more.

[0053] The housing member 50A includes a first plate 51 and a second plate 52A, and the first plate 51 and the second plate 52A are fastened by fasteners such as screws or bolts (not shown). The second plate 52A has through holes 522 at positions facing the corresponding internal spaces 513 among the plurality of internal spaces 513 in the vertical direction in Fig. 9 in a state of being fastened to the first plate 51.

[0054] Each support member 57 is attached to the corresponding through hole 522 among the plurality of through holes 522 and supports the corresponding biasing member 54 among the plurality of biasing members 54. Each support member 57 is, for example, a machine screw and is removable from the through hole 522 in the second plate 52A of the housing member 50A. When the support member 57 is a machine screw, the through hole 522 is a screw hole. Note that the support member 57 only needs to be configured to be removable from the second plate 52A and is not limited to a machine screw.

[0055] From the state shown in Fig. 9, as shown in Fig. 10, the resin-sealing mold 1A according to Embodiment 2 can individually change the biasing members 54 without releasing the fastening between the first plate 51 and the second plate 52A by removing the support members 57 from the through holes 522.

[0056] As described above, the air vent opening / closing unit 5A in the resin-sealed mold 1A according to Embodiment 2 includes a support member 57 that is attached to the housing member 50A and supports the biasing member 54. The support member 57 is removable from the housing member 50A. Thereby, in the resin-sealed mold 1A according to Embodiment 2, the biasing member 54 can be easily replaced, and the timing at which the movable pin 53 closes the flow path 141 of the air vent 14 can be easily adjusted.

[0057] <3. Embodiment 3> The resin-sealed mold according to Embodiment 3 is different from the resin-sealed mold according to Embodiment 2 in that it includes a movement restricting member that restricts the movement of the movable pin in a direction opposite to the biasing direction of the movable pin in the air vent opening / closing unit. In the following, components having the same functions as those in Embodiment 2 are denoted by the same reference numerals and the description thereof is omitted, and the description will be centered on the differences from the resin-sealed mold 1A of Embodiment 2.

[0058] As shown in FIG. 11, the air vent opening / closing unit 5B of the resin-sealed mold 1B according to Embodiment 3 is different from the resin-sealed mold 1A of Embodiment 2 in that it further includes a plurality of movement restricting members 58. In FIG. 11, the lower mold 2, the ejector unit 4, etc. are not shown. Also, in FIG. 11, although hatching is not applied, a part is shown in cross section.

[0059] The sets of the movable pin 53, the biasing member 54, the position adjusting member 55, the support member 57, and the movement restricting member 58 are provided in the same number as the number of air vents 14. In FIG. 9, two sets of the biasing member 54, the position adjusting member 55, the support member 57, and the movement restricting member 58 are shown, but in the air vent opening / closing unit 5B, the sets of the biasing member 54, the position adjusting member 55, the support member 57, and the movement restricting member 58 may be one or three or more.

[0060] Each movement restricting member 58 contacts the corresponding movable pin 53 when the corresponding movable pin 53 among the plurality of movable pins 53 is pushed in a direction opposite to the biasing direction, and restricts the movement of the movable pin 53 in the direction opposite to the biasing direction.

[0061] As shown in FIG. 12, the movement restricting member 58 includes a columnar base portion 581 and a columnar protruding portion 582 having a smaller diameter than the base portion 581. The movement restricting member 58 is formed of, for example, metal, but may be formed of resin or the like.

[0062] In a state where the movement restricting member 58 is accommodated inside the accommodating member 50A, one surface of the base portion 581 of the movement restricting member 58 abuts against the biasing member 54, and the other surface abuts against the lower surface 521 of the second plate 52A, and the protruding portion 582 of the movement restricting member 58 is in a state of entering the hollow portion of the biasing member 54.

[0063] The support member 57 supports the biasing member 54 via the base portion 581 of the movement restricting member 58. Note that the resin sealing die 1B may be configured to include the second plate 52 instead of the second plate 52A. In this case, the second plate 52 functions as a support member that supports the biasing member 54 via the base portion 581 of the movement restricting member 58.

[0064] Next, the operation of the air vent opening / closing unit 5B will be described. As shown in FIG. 13(a), in a state where the air vent opening / closing unit 5B is not pressed in a direction toward the upper die 3 by a driving mechanism (not shown), the head portion 5311 of each of the two movable pins 53 is biased downward in FIG. 13 by the corresponding biasing member 54 among the two biasing members 54.

[0065] The height of the left position adjusting member 55 in FIG. 13(a) is lower than the height of the right position adjusting member 55 in FIG. 13(a). Therefore, the left movable pin 53 in FIG. 13 among the two movable pins 53 is closer to the air vent 14 than the right movable pin 53 in FIG. 13(a).

[0066] Here, when the air vent opening / closing unit 5B is pressed by a drive mechanism (not shown) and moves downward as shown in Fig. 13(a), the movable pin 53 moves toward the lower mold 2 through the through-hole 35 formed in the upper mold 3. At this time, if resin scraps or the like adhere to the inner wall of the through-hole 35, the movable pin 53 may get caught by the resin scraps or the like, and the movement of the movable pin 53 toward the lower mold 2 may be restricted.

[0067] In the example shown in Fig. 13, since resin scraps or the like adhere to the inner wall of the through-hole 35 through which the left movable pin 53 in Fig. 13(a) moves, the movement of the movable pin 53 toward the lower mold 2 is restricted against the biasing force of the biasing member 54.

[0068] As the air vent opening / closing unit 5B moves downward in Fig. 13(a), the protruding portion 582 of the movement restricting member 58 approaches the head portion 5311 of the movable pin 53, and as shown in Fig. 13(b), the protruding portion 582 of the movement restricting member 58 comes into contact with the head portion 5311 of the movable pin 53.

[0069] Therefore, thereafter, when the air vent opening / closing unit 5B is further pressed by a drive mechanism (not shown) and moves downward, the left movable pin 53 in Fig. 13(b) is pressed by the protruding portion 582 of the movement restricting member 58.

[0070] As a result, the restriction on the movement of the left movable pin 53 due to being caught by resin scraps or the like is released in Fig. 13(c), and the flow path 141 of the air vent 14 is blocked. Therefore, the air vent opening / closing unit 5B can prevent the flow path 141 of the air vent 14 from not being blocked without the restriction on the movement of the movable pin 53 due to being caught by resin scraps or the like being released.

[0071] Note that in the above-described example, the air vent opening / closing unit 5B includes the support member 57, but instead of the support member 57 and the second plate 52A, a configuration including the second plate 52 may be adopted. In this case, the second plate 52 functions as a support member that supports the biasing member 54 via the base portion 581 of the movement restricting member 58.

[0072] As described above, the air vent opening / closing unit 5B of the resin-sealed mold 1B according to Embodiment 2 has a movement restricting member 58 that comes into contact with the movable pin 53 when the movable pin 53 is pushed in a direction opposite to the biasing direction by the biasing member 54 and restricts the movement of the movable pin 53 in the direction opposite to the biasing direction by the biasing member 54. Therefore, it is possible to prevent the flow path 141 of the air vent 14 from being blocked without releasing the restriction on the movement of the movable pin 53 due to entrapment such as resin scraps.

[0073] Further, the support member 57 that supports the biasing member 54 is detachable from the air vent opening / closing unit 5B. Thereby, in the resin-sealed mold 1B according to Embodiment 3, the biasing member 54 can be easily replaced, and the timing at which the movable pin 53 blocks the flow path 141 of the air vent 14 can be easily adjusted.

[0074] <4. Embodiment 4> The resin-sealed mold according to Embodiment 4 is different from the resin-sealed mold according to Embodiment 2 in that it includes a sensor that detects the force received by the movable pin from the biasing member when the movable pin is pushed in a direction opposite to the biasing direction in the air vent opening / closing unit. In the following, components having the same functions as those in Embodiment 2 are denoted by the same reference numerals and the description thereof is omitted, and the description will be centered on the differences from the resin-sealed mold 1A of Embodiment 2.

[0075] As shown in FIG. 14, the resin-sealed mold 1C according to Embodiment 4 is different from the resin-sealed mold 1A according to Embodiment 2 in that it includes an air vent opening / closing unit 5C and a control device 9 instead of the air vent opening / closing unit 5B and a control device (not shown).

[0076] The air vent opening / closing unit 5C is different from the resin-sealed mold 1A of Embodiment 2 in that it further includes a plurality of sensors 59. In FIG. 14, the lower mold 2, the ejector unit 4, etc. are not shown. Also, in FIG. 14, although there is no hatching, a part is shown in cross section.

[0077] The set of the movable pin 53C, the biasing member 54, the position adjusting member 55, the support member 57, and the sensor 59 is provided in the same number as the number of the air vents 14. In FIG. 9, two sets of the movable pin 53C, the biasing member 54, the position adjusting member 55, the support member 57, and the sensor 59 are shown, but in the air vent opening / closing unit 5C, the set of the movable pin 53C, the biasing member 54, the position adjusting member 55, the support member 57, and the sensor 59 may be one or three or more.

[0078] The sensor 59 is disposed inside the movable pin 53C and detects the force that the movable pin 53C receives in the biasing direction. Hereinafter, the force that the movable pin 53C receives in the biasing direction may be described as a reaction force.

[0079] As shown in FIG. 15, the movable pin 53C includes a pin body 533 and a metal housing 534, and the head 5311 of the movable pin 53C is formed by the metal housing 534. The sensor 59 is disposed inside the metal housing 534. Such a sensor 59 includes a diaphragm 591 and a strain gauge 592. Although not hatched in FIG. 15, a cross section of the movable pin 53C and the sensor 59 is shown.

[0080] When the movable pin 53C is pushed in the direction opposite to the biasing direction of the movable pin 53C, the pin body 533 pushes the diaphragm 591, causing strain in the diaphragm 591, and such strain is detected by the strain gauge 592 as the above-described reaction force. The configuration including the movable pin 53C and the sensor 59 can also be called a movable pin with a sensor.

[0081] Note that the configuration and arrangement of the sensor 59 are not limited to the example shown in FIG. 15. For example, the sensor 59 may be configured to convert pressure into an electrical signal by a diffused semiconductor transducer. Further, in the air vent opening / closing unit 5C, the movable pin 53 may be provided instead of the movable pin 53C, and the sensor 59 may be disposed between the head 5311 of the movable pin 53 and the biasing member 54.

[0082] While moving the air vent opening / closing unit 5C toward the upper mold 3 by a drive mechanism (not shown), the control device 9 determines whether or not the reaction force detected by the sensor 59 is equal to or greater than a preset value. When the control device 9 determines that the reaction force detected by the sensor 59 is equal to or greater than the preset value, the control device 9 stops moving the air vent opening / closing unit 5C by stopping the pressing of the air vent opening / closing unit 5C by the drive mechanism (not shown).

[0083] This can prevent excessive pressure from being applied to the movable pin 53C when resin scraps or the like adhere to the inner wall of the through hole 35 of the upper mold 3 and the movable pin 53C gets caught by such resin scraps or the like. Note that when the control device 9 determines that the reaction force detected by the sensor 59 is equal to or greater than the preset value, the control device 9 can prevent the sealing resin 7 from leaking from the air vent 14 by stopping the movement of the plunger 6.

[0084] Here, the operation of the air vent opening / closing unit 5C will be described in more detail. As shown in Fig. 16(a), in a state where the air vent opening / closing unit 5C is not being pressed toward the upper mold 3 by a drive mechanism (not shown), the head 5311 of each of the two movable pins 53C is biased downward in Fig. 16 by the corresponding biasing member 54 among the two biasing members 54.

[0085] The height of the left position adjusting member 55 in Fig. 16(a) is lower than the height of the right position adjusting member 55 in Fig. 16(a). Therefore, the left movable pin 53C in Fig. 16 among the two movable pins 53C is closer to the air vent 14 than the right movable pin 53C in Fig. 16(a).

[0086] Here, when the air vent opening / closing unit 5C is pressed by a drive mechanism (not shown) and moves downward in FIG. 16(a), the movable pin 53C moves the through hole 35 formed in the upper mold 3 toward the lower mold 2. At this time, if resin scraps or the like adhere to the inner wall of the through hole 35, the movable pin 53C may be caught by the resin scraps or the like, and the movement of the movable pin 53C toward the lower mold 2 may be restricted.

[0087] In the example shown in FIG. 16, since resin scraps or the like adhere to the inner wall of the through hole 35 through which the left movable pin 53C moves in FIG. 16(a), the movement of the movable pin 53C toward the lower mold 2 is restricted against the biasing force of the biasing member 54. When the air vent opening / closing unit 5C further attempts to move toward the upper mold 3 as shown in FIG. 16(b) from the state shown in FIG. 16(a), a reaction force is applied to the left movable pin 53C in FIG. 16(a), and such a reaction force is detected by the sensor 59.

[0088] When the control device 9 determines that the reaction force detected by the left sensor 59 in FIG. 16(b) is equal to or greater than a preset value, the control device 9 stops the movement of the air vent opening / closing unit 5C by a drive mechanism (not shown). As a result, as shown in FIG. 16(c), the movement of the movable pin 53C toward the air vent 14 is stopped.

[0089] In the above-described example, the air vent opening / closing unit 5C includes the support member 57. However, instead of the support member 57 and the second plate 52A, a configuration including the second plate 52 may be employed. Further, the air vent opening / closing unit 5C may further include a movement restricting member 58.

[0090] As described above, the resin sealing mold 1C according to the fourth embodiment includes the sensor 59 that detects the force received by the movable pin 53C from the biasing member 54 when the movable pin 53C is pushed in a direction opposite to the biasing direction of the movable pin 53C. Thereby, in the resin sealing mold 1C, when resin scraps or the like adhere to the inner wall of the through hole 35 through which the movable pin 53C moves, it is possible to easily determine whether or not the movable pin 53C is caught by the resin scraps or the like.

[0091] Further effects and modifications can be easily derived by those skilled in the art. Therefore, the broader aspects of the present invention are not limited to the specific details and representative embodiments presented and described above. Accordingly, various changes are possible without departing from the spirit or scope of the general inventive concept defined by the appended claims and their equivalents.

Explanation of Reference Numerals

[0092] 1, 1A, 1B, 1C Resin Sealing Mold 2 Lower Mold 3 Upper Mold 4 Ejector Unit 5, 5A, 5B, 5C Air Vent Opening / Closing Unit 6 Plunger 7 Sealing Resin 8 Substrate 9 Control Device 10 Cal 11 Runner 12 Gate 13 Cavity 14 Air Vent 20 Pot 35 Through-Hole 50, 50A Accommodating Member 53, 53C Movable Pin 54 Biasing Member 55 Position Adjusting Member 57 Supporting Member 58 Movement Restricting Member 59 Sensor 141 Flow Path

Claims

1. An air vent having a flow path for discharging the air inside the cavity to the outside, and an air vent opening / closing unit that moves toward the air vent and closes the flow path of the air vent, wherein the air vent opening / closing unit includes a movable pin that closes the flow path of the air vent, a biasing member that biases the movable pin toward the air vent, a position adjusting member that contacts the movable pin biased by the biasing member and adjusts the position of the movable pin in the biasing direction, which is the direction in which the biasing member biases, and a housing member that houses the base end portion of the movable pin located upstream in the biasing direction, the biasing member, and the position adjusting member, with the tip portion of the movable pin located downstream in the biasing direction protruding toward the air vent, wherein the position adjusting member is a cylindrical or semi-cylindrical metal member characterizing the resin-sealed mold.

2. An air vent having a flow path for discharging the air inside the cavity to the outside, and an air vent opening / closing unit that moves toward the air vent and closes the flow path of the air vent, wherein the air vent opening / closing unit includes a movable pin that closes the flow path of the air vent, a biasing member that biases the movable pin toward the air vent, a position adjusting member that contacts the movable pin biased by the biasing member and adjusts the position of the movable pin in the biasing direction, which is the direction in which the biasing member biases, and a housing member that houses the base end portion of the movable pin located upstream in the biasing direction, the biasing member, and the position adjusting member, with the tip portion of the movable pin located downstream in the biasing direction protruding toward the air vent, wherein the air vent opening / closing unit includes a plurality of sets of the movable pin and the position adjusting member, and the position of the movable pin adjusted by the position adjusting member is different for each set characterizing the resin-sealed mold.

3. An air vent having a flow path for discharging the air inside the cavity to the outside, and an air vent opening / closing unit that moves toward the air vent and closes the flow path of the air vent, wherein the air vent opening / closing unit includes a movable pin that closes the flow path of the air vent, a biasing member that biases the movable pin toward the air vent, A position adjusting member that contacts the movable pin urged by the urging member and adjusts the position of the movable pin in the urging direction, which is the direction in which the urging member urges; A housing member that houses the base end portion of the movable pin located upstream in the urging direction, the urging member, and the position adjusting member in a state where the tip portion of the movable pin located downstream in the urging direction protrudes toward the air vent; The air vent opening / closing unit, A support member that supports the urging member; A movement restricting member that contacts the movable pin when the movable pin is pushed in a direction opposite to the urging direction and restricts the movement of the movable pin in the direction opposite to the urging direction; A resin-sealed mold, characterized in that.

4. The air vent opening / closing unit, Comprises a support member that is attached to the housing member and supports the urging member, The support member, Is removable from the housing member The resin-sealed mold according to any one of claims 1 to 3, characterized in that.

5. The support member, Is removable from the air vent opening / closing unit The resin-sealed mold according to claim 3, characterized in that.

6. Comprises a sensor that detects the force received by the movable pin from the urging member when the movable pin is pushed in a direction opposite to the urging direction The resin-sealed mold according to any one of claims 1 to 5, characterized in that.

Images