JP7707750B2 - Resin sealing mold - Google Patents

Description

The disclosed embodiment relates to a resin-sealed mold.

Conventionally, in resin sealing molds, in order to prevent resin from leaking from an air vent that has a flow path that releases air inside the cavity to the outside, a movable pin is used that moves in and out of the air vent flow path to switch the air vent between open and closed states (see, for example, Patent Document 1).

JP 2009-292076 A

In a resin sealing mold having multiple cavities, the timing at which the resin fills the cavities may differ for each cavity. In this case, the timing at which the movable pin advances into the air vent must be different for each cavity so that it coincides with the timing at which the resin reaches the air vent. Also, when multiple air vents are provided for the same cavity, the timing at which the resin reaches the air vent may differ for each air vent. In such cases, too, the timing at which the movable pin advances into the air vent must be different for each air vent.

However, in order to vary the timing at which the movable pin advances into the air vent, the length of the movable pin needs to be adjusted, and such adjustments are cumbersome.

One aspect of the embodiment has been made in consideration of the above, and aims to provide a resin sealing mold that can easily adjust the timing at which the movable pin blocks the flow path of the air vent.

The resin-sealed mold according to one embodiment includes an air vent having a flow path for releasing air inside the cavity to the outside, and an air vent opening/closing unit that moves toward the air vent to block the flow path of the air vent. The air vent opening/closing unit includes a movable pin that blocks the flow path of the air vent, a biasing member that biases the movable pin toward the air vent, a position adjustment member that contacts the movable pin biased by the biasing member to adjust the position of the movable pin in the biasing direction in which the biasing member biases, and a housing member that accommodates the base end of the movable pin located upstream in the biasing direction, the biasing member, and the position adjustment member with the tip end of the movable pin located downstream in the biasing direction protruding toward the air vent.

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

FIG. 1 is a front view showing an example of the configuration of a resin-sealed mold according to the first embodiment. FIG. 2 is a front view showing another example of the configuration of the resin-sealed mold according to the first embodiment. FIG. 3 is a plan view showing an example of the relationship between the cavity, the air vent, and the movable pin in the resin-sealing mold according to the first embodiment. FIG. 4 is a plan view showing another example of the relationship between the cavity, the air vent, and the movable pin in the resin-sealing mold according to the first embodiment. FIG. 5 is a plan view showing still another example of the relationship between the cavity, the air vent, and the movable pin in the resin-sealing mold according to the first embodiment. FIG. 6 is a plan view showing another example of the relationship between the cavity, the air vent, and the movable pin in the resin-sealing mold according to the first embodiment. FIG. 7 is a side view showing an example of the configuration of the air vent opening and closing unit in the resin-sealed mold according to the first embodiment. FIG. 8 is a side view for explaining the operation of the air vent opening and closing unit in the resin-sealed mold according to the first embodiment. FIG. 9 is a side view showing an example of the configuration of an air vent opening and closing unit in the resin-sealed mold according to the second embodiment. FIG. 10 is a side view showing a state in which a support member is removed from the air vent opening and closing unit in the resin-sealed mold according to the second embodiment. FIG. 11 is a side view showing an example of the configuration of an air vent opening and closing unit in the resin-sealed mold according to the third embodiment. FIG. 12 is a diagram illustrating an example of the configuration of the movement restricting member according to the third embodiment. FIG. 13 is a side view for explaining the operation of the air vent opening and closing unit in the resin sealing mold according to the third embodiment. FIG. 14 is a diagram showing an example of the configuration of an air vent opening and closing unit in a resin-sealed mold according to the fourth embodiment. FIG. 15 is a side view showing an example of the configuration of a movable pin and a sensor of an air vent opening and closing unit in a resin-sealed mold according to the fourth embodiment. FIG. 16 is a diagram for explaining the operation of the air vent opening and closing unit in the resin-sealed mold according to the fourth embodiment.

Below, an embodiment of the resin-sealed mold disclosed in this application will be described in detail with reference to the attached drawings. Note that the present invention is not limited to the embodiment shown below.

<1. First embodiment>
<1.1. Configuration of resin-sealed mold>
As shown in Fig. 1, the resin-sealing mold 1 according to the first embodiment includes a lower mold 2, an upper mold 3, and an eject unit 4. Although not hatched, Fig. 1 shows a part in cross section. The resin-sealing mold 1 is controlled by a control device (not shown).

The lower die 2 is formed with a pot 20 in which a cylindrical resin tablet (not shown) is placed, and a plunger 6 is placed in the pot 20. The plunger 6 pressurizes the sealing resin 7 in the pot 20 and sends it to the cavity 13 (described below). The sealing resin 7 is a resin that is made by melting a resin tablet with a heating device (not shown) installed in the resin sealing die 1.

The upper mold 3 is formed with a cull/runner recess 31, a gate recess 32, a cavity recess 33, an air vent recess 34, and the like. The cull/runner recess 31 extends from a position corresponding to the pot 20 of the lower mold 2 toward the right in FIG. 1. The cavity recess 33 is formed, for example, in a rectangular shape in a plan view. The gate recess 32 is formed between the cull/runner recess 31 and the cavity recess 33. The air vent recess 34 is formed continuous with the cavity recess 33.

In the resin sealing mold 1, the lower mold 2 and the upper mold 3 are mated to form the cull 10 (see Figure 3), runner 11 (see Figure 3), gate 12 (see Figure 3), cavity 13, and air vent 14.

Specifically, the cull 10 (see FIG. 3) and runner 11 (see FIG. 3) are formed by the cull/runner recess 31 and the substrate 8 placed on the upper surface 21 of the lower mold 2, and the gate 12 (see FIG. 3) is formed by the gate recess 32 and the upper surface 21 of the lower mold 2. The cavity 13 is formed by the cavity recess 33 and the substrate 8 placed on the upper surface 21 of the lower mold 2, and the air vent 14 is formed by the air vent recess 34 and the substrate 8 placed on the upper surface 21 of the lower mold 2.

The sealing resin 7 supplied from the pot 20 to the cull 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 mated, a substrate 8, which is an example of a material to be sealed, is supplied to the cavity 13, and the sealing resin 7 is supplied onto the substrate 8. The air vent 14 has a flow path 141 that releases the air inside the cavity 13 to the outside when the sealing resin 7 flows into the cavity 13.

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

The eject plate 41 and the fixed pin 42 are connected by an eject spring 43, and the eject plate 41 is biased downward in FIG. 1 via the fixed pin 42 by the eject spring 43. The return pin 44 is attached to the eject 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 fixed pin 42 is determined by the collar 45. When the upper mold 3 and the lower mold 2 are separated after the resin sealing molding, the eject plate 41 is biased downward by the eject spring 43, and the eject pin 46 attached to the eject plate 41 enters the cavity 13 and presses the resin sealing molded product, separating the resin sealing molded product from the upper mold 3.

When producing a resin-sealed molded product in the resin-sealed mold 1, if the flow path 141 of the air vent 14 is open, the sealing resin 7 that has entered the inside of the cavity 13 will leak to the outside through the flow path 141 of the air vent 14. Therefore, the resin-sealed mold 1 is provided with 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 when producing a resin-sealed molded product.

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

When producing a resin-sealed molded product, the air vent opening/closing unit 5 is pushed toward the lower mold 2 by a drive mechanism (not shown), which is a drive source separate from the drive source for aligning the lower mold 2 and the upper mold 3, and the movable pin 53 enters the air vent 14. As a result, 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, and when the pressure from the drive mechanism (not shown) is released, the spring 56 moves the air vent opening/closing unit 5 in a direction away from the lower mold 2. As a result, the movable pin 53 moves away from the flow path 141 of the air vent 14, opening the flow path 141 of the air vent 14. The drive mechanism (not shown) is controlled by a control device (not shown).

In the example shown in FIG. 1, the air vent opening/closing unit 5 is disposed closer to the upper mold 3 than the eject unit 4, but this is not limited to the example. For example, as shown in FIG. 2, the air vent opening/closing unit 5 may be disposed farther from the upper mold 3 than the eject unit 4.

<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 vents 14, and the movable pins 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 culls 10 through four runners 11. Three air vents 14 are connected to the cavity 13, and air within the cavity 13 is released from these three air vents 14 when a resin sealing molded product is produced. The movable pins 53 are provided corresponding to the respective air vents 14.

The time it takes for the sealing resin 7 that flows into the cavity 13 via the runner 10 and the runner 11 to reach the cavity 13 varies depending on the position within the cavity 13. In the example shown in FIG. 3, the time it takes for the sealing resin 7 to reach the regions near the top and bottom ends in FIG. 3 is faster than the time it takes for the sealing resin 7 to reach the regions near the center in FIG. 3. Therefore, the time it takes for the sealing resin 7 to reach the air vents 14 located in the regions near the top and bottom ends in FIG. 3 is faster than the time it takes for the sealing resin 7 to reach the air vents 14 located in the regions near the center in FIG. 3.

Therefore, in order for the movable pin 53 to close the flow path 141 of the air vent 14 at the timing when the sealing resin 7 reaches the air vent 14, it is necessary for the movable pin 53 to close the flow path 141 of the air vent 14 located in the area closer to the upper and lower ends in FIG. 3 earlier than the flow path 141 of the air vent 14 located in the area closer to the center in FIG. 3. Therefore, the resin sealing mold 1 according to the first embodiment has a position adjustment member 55. Such a position adjustment 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. Then, by changing the position adjustment member 55 to a position adjustment member 55 with a different length in the vertical direction in FIG. 1, the timing at which the movable pin 53 blocks the flow path 141 of the air vent 14 can be easily adjusted for each movable pin 53.

The relationship between the cavities 13, air vents 14, and movable pins 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 from one cull 10 through three runners 11 into three cavities 13, but the time it takes for the sealing resin 7 to reach the air vent 14 located in the central cavity 13 in FIG. 4 is shorter than the time it takes for the sealing resin 7 to reach the air vents 14 located in the upper and lower cavities 13 in FIG. 4.

In the example shown in FIG. 5, the sealing resin 7 flows from the cull 10 through the four runners 11 into the four cavities 13, but the time it takes for the sealing resin 7 to reach the air vents 14 located in the upper two cavities 13 in FIG. 5 is shorter than the time it takes for the sealing resin 7 to reach the air vents 14 located in the lower two cavities 13 in FIG. 5.

In the example shown in FIG. 6, the sealing resin 7 flows from each cull 10 into different cavities 13 via different runners 11, but the time it takes for the sealing resin 7 to reach the air vents 14 located in the lower and central cavities 13 in FIG. 6 is shorter than the time it takes for the sealing resin 7 to reach the air vents 14 located in the upper cavity 13 in FIG. 6.

In this way, depending on the relationship between the cavity 13, the air vent 14, and the movable pin 53, the time it takes for the sealing resin 7 to reach the air vent 14 arranged in the cavity 13 differs, and the time it takes for the sealing resin 7 to reach each air vent 14 differs. In this case, too, by changing the position adjustment member 55 to one with a different length in the vertical direction in FIG. 1, the timing at which the movable pin 53 blocks the flow path 141 of the air vent 14 can be easily adjusted for each movable pin 53.

1.3. Configuration of air vent opening/closing unit 5
The configuration of the air vent opening and closing unit 5 will be described in more detail below. As shown in Fig. 7, the air 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 adjustment members 55. Note that the lower mold 2 and the eject unit 4 are not shown in Fig. 7. Also, although no hatching is applied in Fig. 7, a portion is shown in cross section.

The number of sets of movable pins 53, biasing members 54, and position adjustment members 55 is the same as the number of air vents 14. In FIG. 7, two sets of movable pins 53, biasing members 54, and position adjustment members 55 are shown, but the air vent opening/closing unit 5 may have one or three or more sets of movable pins 53, biasing members 54, and position adjustment members 55.

The housing member 50 includes a first plate 51 and a second plate 52, which are fastened to each other by fasteners such as screws or bolts (not shown). The first plate 51 is formed with a plurality of recesses 511 and a plurality of through holes 512. A pair of the recesses 511 and the through holes 512 is provided for each movable pin 53. A corresponding one of the plurality of movable pins 53 is inserted into each through hole 512.

The base end 531 of the movable pin 53, the biasing member 54, and the position adjustment member 55 are housed 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. In the air vent opening and closing unit 5, the base end 531 of the movable pin 53 located upstream in the direction toward the air vent 14 is housed in the internal space 513 with the tip end 532 located downstream in the direction toward the air vent 14 protruding toward the air vent 14.

When producing a resin-sealed molded product, the air vent opening/closing unit 5 is pushed toward the lower mold 2 by a drive mechanism (not shown), and the tip 532 of the movable pin 53 enters the air vent 14 and contacts the substrate 8. This causes the tip 532 of the movable pin 53 to block the flow path 141 of the air vent 14. This prevents the sealing resin 7 from flowing out to the outside through the flow path 141 of the air vent 14.

When a resin-sealed molded product is produced using the resin-sealing mold 1 such that the air vent 14 does not face the substrate 8 in the vertical direction in FIG. 7, the tip 532 of the movable pin 53 comes into contact with the upper surface 21 of the lower mold 2, blocking the flow path 141 of the air vent 14 with the tip 532 of the movable pin 53.

The biasing member 54 biases the movable pin 53 in a 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, that 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 may be made of, for example, elastic resin or rubber, as long as it can bias the movable pin 53 toward the air vent 14.

When the movable pin 53 comes into contact with the substrate 8, the movable pin 53 is pushed by the substrate 8, and moves in the opposite direction to the biasing direction in which the biasing member 54 biases the movable pin 53. This prevents the movable pin 53 from being pushed too far toward the substrate 8 or the upper surface 21 of the lower mold 2, and thus prevents too much force from being applied to the movable pin 53.

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

The position adjustment member 55 is not limited to being a cylindrical metal member as long as it is configured to adjust the position of the movable pin 53 in the biasing direction of the biasing member 54. For example, the position adjustment member 55 may be a semi-cylindrical metal member, or may be a cylindrical or semi-cylindrical resin member. The shape of the position adjustment member 55 is not limited to being cylindrical or semi-cylindrical.

In the example shown in FIG. 7, the vertical length in FIG. 7 differs for each position adjustment member 55. As a result, the timing at which the movable pin 53 blocks the flow path 141 of the air vent 14 changes for each movable pin 53. In this way, by changing the vertical length in FIG. 7 of the position adjustment member 55 for each pair of movable pin 53 and position adjustment member 55, the timing at which the movable pin 53 blocks the flow path 141 of the air vent 14 can be easily changed for each movable pin 53.

The position adjustment member 55 can be replaced 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. As a result, in the resin sealing mold 1, even if the arrival time of the sealing resin 7 at the air vent 14 changes due to, for example, the heating conditions of the lower mold 2, the heating conditions of the upper mold 3, and the material of the sealing resin 7, the timing at which the movable pin 53 blocks the flow path 141 of the air vent 14 can be easily changed for each movable pin 53 by replacing the position adjustment member 55.

<1.4. Operation of air vent opening/closing unit 5>
Next, the operation of the air vent opening and closing unit 5 will be described. In the following, an example will be described in which two position adjustment members 55 have different lengths in the biasing direction of the movable pin 53 by the biasing member 54. Hereinafter, the length of the position adjustment 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 adjustment member 55.

As shown in FIG. 8(a), when the air vent opening/closing unit 5 is not being pressed toward the upper mold 3 by a drive mechanism (not shown), the heads 5311 of the two movable pins 53 are biased downward in FIG. 8(a) by the corresponding one of the two biasing members 54.

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

Then, the air vent opening/closing unit 5 is pressed by a drive mechanism (not shown) to move downward in FIG. 8, and as shown in FIG. 8(b), of the two movable pins 53, the left movable pin 53 in FIG. 8(b) first blocks the flow path 141 of the air vent 14.

After that, when the air vent opening/closing unit 5 is further pressed downward by a drive mechanism (not shown), as shown in FIG. 8(c), the right movable pin 53 of the two movable pins 53 in FIG. 8(c) blocks the flow path 141 of the air vent 14. Furthermore, the left movable pin 53 of the two movable pins 53 in FIG. 8(c) is in a state where it blocks the flow path 141 of the air vent 14 and is therefore pushed by the substrate 8, so that it moves in the opposite direction to the biasing direction in which it is biased by the biasing member 54.

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

As described above, the resin-sealed mold 1 according to the first embodiment includes an air vent 14 having a flow path 141 for releasing air inside the cavity 13 to the outside, and an air vent opening/closing unit 5 that moves toward the air vent 14 to block the flow path 141 of the air vent 14. The air vent opening/closing unit 5 includes a movable pin 53 that blocks 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 adjustment member 55 that contacts the movable pin 53 biased by the biasing member 54 to adjust the position of the movable pin 53 in the biasing direction in which the biasing member 54 biases, and a housing member 50 that accommodates the base end 531 of the movable pin 53 located upstream in the biasing direction, the biasing member 54, and the position adjustment member 55 with the tip end 532 of the movable pin 53 located downstream in the biasing direction protruding toward the air vent 14. This makes it easy to adjust the timing at which the movable pin 53 blocks the flow path 141 of the air vent 14 in the resin sealing mold 1 of embodiment 1.

The air vent opening/closing unit 5 also includes multiple sets of movable pins 53 and position adjustment members 55. The position of the movable pins 53 in the biasing direction adjusted by the position adjustment members 55 differs for each set. This allows the resin sealing mold 1 to change the timing at which the movable pins 53 block the flow path 141 of the air vent 14 for each movable pin 53.

<2. Second embodiment>
The resin-sealed mold according to the second embodiment differs from the resin-sealed mold according to the first embodiment in that it includes a support member that is attached to a housing member in the air vent opening and closing unit and supports a biasing member. In the following, components having the same functions as those in the first embodiment are denoted by the same reference numerals and their explanations are omitted, and the explanation will be focused on the points that are different from the resin-sealed mold 1 of the first embodiment.

As shown in FIG. 9, the air vent opening and closing unit 5A of the resin-sealed mold 1A according to the second embodiment includes a housing member 50A, a plurality of movable pins 53, a plurality of biasing members 54, a plurality of position adjustment members 55, and a plurality of support members 57. Note that the lower mold 2 and the eject unit 4 are not shown in FIG. 9. Also, although not hatched, FIG. 9 shows a portion in cross section.

The number of sets of movable pins 53, biasing members 54, position adjustment members 55, and support members 57 is the same as the number of air vents 14. In FIG. 9, two sets of biasing members 54, position adjustment members 55, and support members 57 are shown for each air vent 14, but the air vent opening/closing unit 5A may have one or three or more sets of biasing members 54, position adjustment members 55, and support members 57.

The housing member 50A includes a first plate 51 and a second plate 52A, which are fastened to each other by fasteners such as screws or bolts (not shown). When fastened to the first plate 51, the second plate 52A has through holes 522 at positions facing corresponding ones of the multiple internal spaces 513 in the vertical direction in FIG. 9.

Each support member 57 is attached to a corresponding one of the multiple through holes 522, and supports a corresponding one of the multiple biasing members 54. Each support member 57 is, for example, a screw, and is removable from a through hole 522 in the second plate 52A of the storage member 50A. When the support member 57 is a screw, the through hole 522 is a screw hole. Note that the support member 57 is not limited to a screw, as long as it is configured to be removable from the second plate 52A.

In the resin sealing mold 1A according to the second embodiment, by removing the support member 57 from the through hole 522 as shown in FIG. 10 from the state shown in FIG. 9, the biasing member 54 can be changed individually without releasing the fastening between the first plate 51 and the second plate 52A.

As described above, the air vent opening and closing unit 5A in the resin-sealed mold 1A according to the second embodiment 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. This allows the resin-sealed mold 1A according to the second embodiment to easily replace the biasing member 54 and easily adjust the timing at which the movable pin 53 blocks the flow path 141 of the air vent 14.

<3. Embodiment 3>
The resin-sealed mold according to the third embodiment differs from the resin-sealed mold according to the second embodiment in that the air vent opening and closing unit includes a movement restricting member that restricts the movement of the movable pin in the direction opposite to the biasing direction of the movable pin. In the following, components having the same functions as those in the second embodiment are denoted by the same reference numerals and their explanations are omitted, and the explanation will be focused on the points that are different from the resin-sealed mold 1A of the second embodiment.

As shown in FIG. 11, the air vent opening and closing unit 5B of the resin-sealed mold 1B according to the third embodiment differs from the resin-sealed mold 1A according to the second embodiment in that it further includes a plurality of movement restriction members 58. Note that the lower mold 2 and the eject unit 4 are not shown in FIG. 11. Also, although not hatched, FIG. 11 shows a cross section of a portion.

The number of sets of movable pins 53, biasing members 54, position adjustment members 55, support members 57, and movement restriction members 58 is the same as the number of air vents 14. In FIG. 9, two sets of biasing members 54, position adjustment members 55, support members 57, and movement restriction members 58 are shown, but the air vent opening/closing unit 5B may have one or three or more sets of biasing members 54, position adjustment members 55, support members 57, and movement restriction members 58.

When a corresponding one of the multiple movable pins 53 is pressed in the direction opposite to the biasing direction, each movement restricting member 58 comes into contact with the corresponding movable pin 53 and restricts the movement of the movable pin 53 in the direction opposite to the biasing direction.

As shown in FIG. 12, the movement restricting member 58 has a cylindrical base 581 and a cylindrical protrusion 582 having a smaller diameter than the base 581. The movement restricting member 58 is made of, for example, metal, but may also be made of resin or the like.

When the movement restricting member 58 is housed inside the housing member 50A, one surface of the base 581 of the movement restricting member 58 is in contact with the biasing member 54 and the other surface is in contact with the lower surface 521 of the second plate 52A, and the protrusion 582 of the movement restricting member 58 is inserted into the hollow portion of the biasing member 54.

The support member 57 supports the biasing member 54 via the base 581 of the movement restricting member 58. The resin sealing mold 1B may be configured to include a 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 581 of the movement restricting member 58.

Next, the operation of the air vent opening/closing unit 5B will be described. As shown in FIG. 13(a), when the air vent opening/closing unit 5B is not being pressed toward the upper mold 3 by a drive mechanism (not shown), the heads 5311 of the two movable pins 53 are biased downward in FIG. 13 by the corresponding one of the two biasing members 54.

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

When the air vent opening/closing unit 5B is pressed by a drive mechanism (not shown) and moves downward in FIG. 13(a), the movable pin 53 moves through the through hole 35 formed in the upper mold 3 toward the lower mold 2. At this time, if resin residue or the like is attached to the inner wall of the through hole 35, the movable pin 53 may get caught on the resin residue or the like, restricting the movement of the movable pin 53 toward the lower mold 2.

In the example shown in FIG. 13, resin residue or the like is attached to the inner wall of the through hole 35 through which the left movable pin 53 in FIG. 13(a) moves, so the movement of the movable pin 53 toward the lower die 2 against the biasing force of the biasing member 54 is restricted.

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

Therefore, when the air vent opening/closing unit 5B is subsequently pressed further downward by a drive mechanism (not shown), the left movable pin 53 in FIG. 13(b) is pressed against the protrusion 582 of the movement restriction member 58.

As a result, the left movable pin 53 in FIG. 13(c) is released from the restriction on movement due to being caught by resin residue or the like, and blocks the flow path 141 of the air vent 14. Therefore, the air vent opening/closing unit 5B can prevent the flow path 141 of the air vent 14 from becoming blocked due to the restriction on the movement of the movable pin 53 not being released due to being caught by resin residue or the like.

In the above example, the air vent opening/closing unit 5B includes the support member 57, but it may also include the second plate 52 instead of the support member 57 and 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 581 of the movement restricting member 58.

As described above, the air vent opening and closing unit 5B of the resin sealing mold 1B according to embodiment 2 has a movement restriction member 58 that contacts the movable pin 53 when the movable pin 53 is pushed in the direction opposite to the biasing direction of the biasing member 54, and restricts the movement of the movable pin 53 in the direction opposite to the biasing direction of the biasing member 54. This prevents the flow path 141 of the air vent 14 from becoming blocked due to the restriction on the movement of the movable pin 53 not being released due to being caught on resin residue or the like.

In addition, the support member 57 that supports the biasing member 54 is removable from the air vent opening and closing unit 5B. This allows the resin sealing mold 1B of embodiment 3 to easily replace the biasing member 54, and allows the timing at which the movable pin 53 blocks the flow path 141 of the air vent 14 to be easily adjusted.

<4. Embodiment 4>
The resin-sealed mold according to the fourth embodiment differs from the resin-sealed mold according to the second embodiment in that it includes a sensor that detects the force that the movable pin receives from the biasing member when the movable pin is pressed in the opposite direction to the biasing direction of the movable pin in the air vent opening and closing unit. In the following, components having the same functions as those in the second embodiment are denoted by the same reference numerals and their explanations are omitted, and the explanation will focus on the differences from the resin-sealed mold 1A of the second embodiment.

As shown in FIG. 14, the resin-sealed mold 1C according to the fourth embodiment differs from the resin-sealed mold 1A according to the second embodiment 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).

The air vent opening/closing unit 5C differs from the resin sealing mold 1A of the second embodiment in that it further includes a plurality of sensors 59. Note that the lower mold 2 and the eject unit 4 are not shown in FIG. 14. Also, although not hatched, FIG. 14 shows a cross section of a portion.

The number of sets of movable pins 53C, biasing members 54, position adjustment members 55, support members 57, and sensors 59 is the same as the number of air vents 14. In FIG. 9, two sets of movable pins 53C, biasing members 54, position adjustment members 55, support members 57, and sensors 59 are shown, but the air vent opening/closing unit 5C may have one or three or more sets of movable pins 53C, biasing members 54, position adjustment members 55, support members 57, and sensors 59.

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 referred to as a reaction force.

As shown in FIG. 15, the movable pin 53C includes a pin body 533 and a metal housing 534, and the metal housing 534 forms the head 5311 of the movable pin 53C. The sensor 59 is disposed inside the metal housing 534. The sensor 59 includes a diaphragm 591 and a strain gauge 592. Note that FIG. 15 shows a cross section of the movable pin 53C and the sensor 59, although no hatching is applied.

When the movable pin 53C is pressed in the direction opposite to the biasing direction of the movable pin 53C, the pin body 533 presses the diaphragm 591, causing distortion in the diaphragm 591, and this distortion is detected by the strain gauge 592 as the reaction force described above. A configuration including the movable pin 53C and the sensor 59 can also be called a movable pin with a sensor.

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 using a diffusion-type semiconductor transducer. Also, the air vent opening/closing unit 5C may have a movable pin 53 instead of the movable pin 53C, and the sensor 59 may be arranged between the head 5311 of the movable pin 53 and the biasing member 54.

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 while the air vent opening/closing unit 5C is being moved in the direction toward the upper mold 3 by a drive mechanism (not shown). When the control device 9 determines that the reaction force detected by the sensor 59 is equal to or greater than a preset value, it stops the movement of the air vent opening/closing unit 5C by stopping the pressure on the air vent opening/closing unit 5C by the drive mechanism (not shown).

This makes it possible to prevent excessive pressure from being applied to the movable pin 53C in the event that resin residue or the like adheres to the inner wall of the through hole 35 of the upper die 3 and the movable pin 53C gets caught on the resin residue or the like. When the control device 9 determines that the reaction force detected by the sensor 59 is equal to or greater than a preset value, it stops the movement of the plunger 6, thereby preventing the sealing resin 7 from leaking from the air vent 14.

The operation of the air vent opening and closing unit 5C will now be described in more detail. As shown in FIG. 16(a), when the air vent opening and closing unit 5C is not being pressed in the direction toward the upper mold 3 by a drive mechanism (not shown), the heads 5311 of the two movable pins 53C are biased downward in FIG. 16 by the corresponding one of the two biasing members 54.

The height of the left position adjustment member 55 in FIG. 16(a) is lower than the height of the right position adjustment member 55 in FIG. 16(a). Therefore, of the two movable pins 53C, the left movable pin 53C in FIG. 16 is closer to the air vent 14 than the right movable pin 53C in FIG. 16(a).

When the air vent opening/closing unit 5C is pressed by a drive mechanism (not shown) to move downward in FIG. 16(a), the movable pin 53C moves through the through hole 35 formed in the upper mold 3 toward the lower mold 2. At this time, if resin residue or the like is attached to the inner wall of the through hole 35, the movable pin 53C may get caught on the resin residue or the like, restricting the movement of the movable pin 53C toward the lower mold 2.

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

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, it stops the movement of the air vent opening/closing unit 5C by the drive mechanism (not shown). This stops the movement of the movable pin 53C toward the air vent 14, as shown in FIG. 16(c).

In the above example, the air vent opening/closing unit 5C includes the support member 57, but it may also include a second plate 52 instead of the support member 57 and the second plate 52A. The air vent opening/closing unit 5C may also include a movement restriction member 58.

As described above, the resin sealing mold 1C according to the fourth embodiment includes a sensor 59 that detects the force that the movable pin 53C receives from the biasing member 54 when the movable pin 53C is pressed in the direction opposite to the biasing direction of the movable pin 53C. This makes it easy to determine whether the movable pin 53C is caught on resin residue or the like when resin residue or the like is attached to the inner wall of the through hole 35 through which the movable pin 53C moves.

Further advantages and modifications may readily occur to those skilled in the art. Therefore, the invention in its broader aspects is not limited to the specific details and representative embodiments shown and described above. Accordingly, various modifications may be made without departing from the spirit or scope of the general inventive concept as defined by the appended claims and equivalents thereof.

REFERENCE SIGNS LIST 1, 1A, 1B, 1C resin sealing mold 2 lower mold 3 upper mold 4 eject unit 5, 5A, 5B, 5C air vent opening/closing unit 6 plunger 7 sealing resin 8 substrate 9 control device 10 cull 11 runner 12 gate 13 cavity 14 air vent 20 pot 35 through hole 50, 50A accommodation member 53, 53C movable pin 54 biasing member 55 position adjustment member 57 support member 58 movement restriction member 59 sensor 141 flow path

Claims (6)

an air vent having a flow path for releasing air inside the cavity to the outside;
an air vent opening/closing unit that moves toward the air vent to close the flow path of the air vent;
The air vent opening and closing unit includes:
A movable pin that blocks the flow path of the air vent;
A biasing member that biases the movable pin toward the air vent;
a position adjustment member that comes into contact with the movable pin biased by the biasing member to adjust a position of the movable pin in a biasing direction in which the biasing member biases the movable pin;
a housing member that houses a base end portion of the movable pin located upstream in the biasing direction, the biasing member, and the position adjustment member in a state in which a tip end portion of the movable pin located downstream in the biasing direction protrudes toward the air vent ,
The position adjustment member is
A cylindrical or semi-cylindrical metal member
A resin-sealing mold comprising: an air vent having a flow path for releasing air inside the cavity to the outside;
an air vent opening/closing unit that moves toward the air vent to close the flow path of the air vent;
The air vent opening and closing unit includes:
A movable pin that blocks the flow path of the air vent;
A biasing member that biases the movable pin toward the air vent;
a position adjustment member that comes into contact with the movable pin biased by the biasing member to adjust a position of the movable pin in a biasing direction in which the biasing member biases the movable pin;
a housing member that houses a base end portion of the movable pin located upstream in the biasing direction, the biasing member, and the position adjustment member in a state in which a tip end portion of the movable pin located downstream in the biasing direction protrudes toward the air vent,
The air vent opening and closing unit includes:
a plurality of pairs of the movable pin and the position adjustment member;
The resin sealing mold, characterized in that the position of the movable pin adjusted by the position adjustment member differs for each group. an air vent having a flow path for releasing air inside the cavity to the outside;
an air vent opening/closing unit that moves toward the air vent to close the flow path of the air vent;
The air vent opening and closing unit includes:
A movable pin that blocks the flow path of the air vent;
A biasing member that biases the movable pin toward the air vent;
a position adjustment member that comes into contact with the movable pin biased by the biasing member to adjust a position of the movable pin in a biasing direction in which the biasing member biases the movable pin;
a housing member that houses a base end portion of the movable pin located upstream in the biasing direction, the biasing member, and the position adjustment member in a state in which a tip end portion of the movable pin located downstream in the biasing direction protrudes toward the air vent,
The air vent opening and closing unit includes:
A support member that supports the biasing member;
a movement restricting member that contacts the movable pin when the movable pin is pressed in the direction opposite to the biasing direction to restrict movement of the movable pin in the direction opposite to the biasing direction. The air vent opening and closing unit includes:
a support member attached to the housing member and supporting the biasing member,
The support member is
The resin sealing die according to claim 1 , which is removable from the housing member. The support member is
The resin sealing die according to claim 3 , which is detachable from the air vent opening and closing unit. 6. The resin sealing mold according to claim 1, further comprising a sensor that detects a force that the movable pin receives from the biasing member when the movable pin is pressed in a direction opposite to the biasing direction.