JP5086595B2 - Mold for molding - Google Patents

Description

  The present invention relates to a molding die, and more particularly to a molding die to which a chase unit constituting a cavity can be attached and detached.

  Conventionally, a resin molding apparatus 1 shown in FIG. 5 is known (see Patent Document 1).

  The resin molding apparatus 1 includes an upper mold 10 and a lower mold 20. The upper mold 10 is provided with a fixed block 12 on the lower side of the base block 11 (lower side in FIG. 5: lower mold 20 side). The chase unit 13 can be attached to or detached from the fixed block 12. That is, various types of products can be molded with resin by replacing (detaching) the chase unit 13 in accordance with a product to be molded with resin (for example, a semiconductor chip).

  Further, at the time of molding, the inside of the cavity is preferably depressurized compared to the outside air in order to improve the molding quality. For this purpose, a sealing member 14 that includes the chase unit 13 and can block outside air is provided. The seal member 14 is rotatably attached to one end of the base block 11 by a turning member 15. The base block 11 and the seal member 14 are connected to a rotation position restricting member 16 for restricting the position of the rotation by the rotation member 15.

  With such a configuration, in the resin molding apparatus 1, the chase unit 13 can be attached and detached as necessary using the opening 17 of the seal member 14 that rotates and opens and closes.

  Note that the lower mold 20 side is also configured in such a manner that the top and bottom of the upper mold 10 described above are substantially reversed.

JP-A-9-123205

  However, the resin molding apparatus 1 described above has the following problems.

  As described above, the sealing member 14 in the resin molding die 1 is opened and closed by rotating by the rotating member 15 provided on one end side of the base block 11. Therefore, in order to make the chase unit 13 detachable, the opening amount H (see FIG. 5) on the other end side of the base block 11 (that is, the counter-rotating member side) is set to the thickness of the chase unit 13 (FIG. 5). The thickness in the vertical direction). As a result, in order to secure the opening amount, the upper mold 10 and the lower mold 20 need to be further separated (open) in the vertical direction (as a whole mold). In doing so, it is necessary to secure a space in the vertical direction of the apparatus, which impedes the degree of freedom of installation.

  In addition, since the sealing member 14 is rotated and opened and closed with the fixing point by the rotating member 15 as a base point, when the sealing member 14 is opened and closed, contact with the chase unit 13 (or the fixing block 12) should be avoided. It is necessary to provide a gap in advance between the inner wall 14A of the seal member 14 and the side surface of the chase unit 13 (or the fixed block 12). In other words, providing such a gap means that the effective area for resin molding (≈surface area of the chase unit 13 in plan view) is reduced when the size of the entire molding apparatus is limited. Therefore, the production efficiency of the apparatus can be reduced.

  The present invention has been made to solve such problems, and can be opened / closed with a smaller opening amount even when the chase unit is attached / detached after the seal member can be opened and closed for exchanging the chase unit. In addition, the present invention provides a molding die that can ensure the maximum surface area of the chase unit.

The present invention includes a first seal that has a first mold and a first chase unit that can be attached to and detached from the first mold, and that can contain the first chase unit and shut off outside air. A member is a molding die that can be opened and closed with respect to the first mold by an opening and closing mechanism, and the opening and closing mechanism connects the first seal member and the first mold, respectively. And at least a pair of rod-like connecting members arranged so as to intersect each other , the pair of rod-like connecting members intersecting at a non-center position in the longitudinal direction of the rod-like connecting member, and the first seal member The above- mentioned problem is solved by configuring the opening / closing amount of the first mold to be different between the one end side and the other end side of the rod-shaped connecting member .

  By adopting such a configuration, the sealing member is not simply rotated and opened with respect to the mold, but only the one end (front side) of the mold is lifted so that the entire sealing member is relative to the mold. It is possible to open more vertically. As a result, even when the chase unit is opened so that it can be attached and detached, the amount of opening (the maximum height of the seal member when the seal member is open (on the basis of the mold) as compared with the case of simple rotation ( The vertical height from the mold), and so on) can be designed smaller. Further, since the seal member can be opened “in a more vertical direction” with respect to the mold, the gap for avoiding interference between the inner wall of the seal member and the side surface of the chase unit can be designed to be smaller. That is, since the effective area of the chase unit can be designed to be large, the production efficiency of the apparatus can be improved and the object to be molded can be expanded.

  And a second mold disposed opposite to the first mold and a second chase unit detachable from the second mold, and enclosing the second chase unit. A second seal member capable of blocking outside air can be opened and closed with respect to the second mold by an opening / closing mechanism, and the opening / closing mechanism connects the second seal member and the second mold, respectively. If it is configured to include at least a pair of rod-like connecting members that are connected and arranged to cross each other, the chase unit of both types (upper die and lower die) each has a minimum opening amount of the seal member. Since attachment and detachment becomes possible, it becomes possible to raise the installation freedom more as the whole apparatus. Further, by applying to both molds, for example, it becomes effective even when molding is required on both sides of the lead frame.

Specifically, the second sealing member and the second pair of dies and a disposed linked and cross each other respective rod-like connecting members, crossed by the longitudinal center position of the rod-like connecting member , enjoyed the second sealing member, when to open and close in a direction perpendicular to the front Stories second mold, the above advantages (smaller aperture size, the chase units effective area enlarged) to maximize can do.

Incidentally, the second seal member and the second mold and the connected respectively and a pair of rod-like connecting member arranged to cross each other, are crossed by longitudinal non-centered position of the rod-like connecting member, wherein closing amount for the previous SL second die of the second sealing member, if one end and the other end in a different way construction of the rod-like connecting member, as compared with the case where the sealing member was simply rotated The above advantages (smaller opening amount, expansion of the effective area of the chase unit) can be enjoyed. On the other hand, since the side (front side) on which the chase unit is attached / removed opens more widely than when it is opened and closed vertically, there is an advantage that it is easy to attach / detach.

  Further, if the opening / closing mechanism includes an auxiliary member that urges the sealing member in the anti-gravity direction, the opening / closing operation of the sealing member can be performed with less force, and a safer and simpler chase unit. It is possible to perform the attaching / detaching work.

  By applying the present invention, the degree of freedom of installation of the entire apparatus is increased. In addition, a large effective area of the chase unit can be secured.

  Hereinafter, an example of an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a side view (right side view) of a molding die 101 showing an example of an embodiment of the present invention. FIG. 2 is a perspective view of the lower mold 140 in FIG. 1 and shows a state in the middle of mounting the chase unit. FIG. 3 is a perspective view of the lower mold 140 in FIG. 1 and shows a state after the chase unit is attached.

  The molding die 101 includes an upper die (first die) 110 and a lower die (second die) 140 that are arranged to face each other. A press mechanism (not shown) is connected to the molding die 101, and can be opened and closed (the upper die 110 and the lower die 140 are brought into contact with and separated from each other) at a predetermined timing.

  The upper mold 110 includes a base upper mold base block 111 and an upper mold chase unit 113 configured to be detachable from the upper mold base block 111. A cavity having a shape corresponding to the shape of the molded product is formed on the surface of the upper die chase unit 113 (the surface on the lower die 140 side). Further, the upper mold base block 111 is provided with an upper mold seal member 114 that is connected to be opened and closed by an opening / closing mechanism (details will be described later). The upper mold seal member 114 includes the upper mold chase unit 113 described above and is configured to be able to block outside air. Therefore, the upper mold seal member 114 is formed in a so-called “annular” shape so as to surround the upper mold chase unit 113.

  In the opening / closing mechanism described above, the two link members (the upper mold first link member 115 and the upper mold second link member 116) respectively connecting the upper mold seal member 114 and the upper mold base block 111 intersect each other (each It intersects at the longitudinal center of the link member. The intersection of the upper mold first link member 115 and the upper mold second link member 116 is pivotally supported by a link fulcrum member 118 (both link members 115 and 116 can freely rotate around the link fulcrum member 118. Fixed in state).

  One end of the upper mold first link member 115 is an attachment / detachment direction side (hereinafter simply referred to as “attachment / removal direction”) of the upper mold chase unit 113 on the right side surface of the upper mold seal member 114 (front side in FIG. 1; hereinafter the same). At the position on the left side), and pivotally supported by the link end fixing member 117. On the other hand, a roller 119 is installed at the other end of the upper mold first link member 115. The roller 119 is configured to freely roll inside the slide hole 111A while being fitted into a slide hole 111A formed on the right side surface of the upper mold base block 111 (front side in FIG. 1; hereinafter the same). Yes. The slide hole 111 </ b> A is formed at a position on the right side surface of the upper die base block 111 on the side opposite to the attachment / detachment direction (the opposite side to the attachment / detachment direction of the upper die chase unit 113). In this embodiment, the roller 119 is configured to freely roll in the slide hole 111A. However, for example, the end of the link member slides directly in the slide hole. (The same applies to the slide hole 114A).

  One end of the upper mold second link member 116 is pivotally supported by a link end fixing member 117 at a position on the right side surface of the upper mold base block 111 on the attachment / detachment direction side. On the other hand, a roller 119 is installed at the other end of the upper mold second link member 116. The roller 119 can freely roll inside the slide hole 114A while being fitted in the slide hole 114A provided on the right side surface of the upper mold seal member 114 on the side opposite to the attachment / detachment direction. ing.

  Further, an auxiliary member 112 is disposed between the surface of the upper mold base block 111 (the surface of the lower mold 140 side) and the upper surface of the upper mold seal member 114 (the upper mold 110 side). The auxiliary member 112 urges the upper mold seal member 114 in the antigravity direction. That is, the upper mold seal member 114 is prevented from being opened at a stretch by its own weight, and can be closed with less external power when the upper mold seal member 114 is closed. Various specific configurations of the auxiliary member are conceivable, but it is also possible to use an elastic body such as rubber or a spring, and it is also possible to use a damper filled with gas. In the present embodiment, the auxiliary members are arranged one by one near the one end side and the other end side of the first and second link members 115, 116, but the present invention is not limited to such a configuration. There may be one and may be three or more. Furthermore, it is also possible to adopt a configuration in which the first and second link members 115 and 116 are built in the link fulcrum member 118 that pivots.

  The lower mold 140 includes a lower mold base block 141 serving as a base and a lower mold chase unit 143 configured to be detachable from the lower mold base block 141. A cavity having a shape corresponding to the shape of the molded product is formed on the surface of the lower die chase unit 143 (the surface on the upper die 110 side) (see FIGS. 2 and 3). The lower mold base block 141 is provided with a lower mold seal member 144 that is connected to be opened and closed by an opening / closing mechanism. The lower mold seal member 144 includes the lower mold chase unit 143 described above and is configured to be able to block outside air. Therefore, the lower mold seal member 144 is configured in a so-called “annular shape” so as to surround the lower mold chase unit 143.

  In the opening / closing mechanism, two link members (a lower mold first link member 145 and a lower mold second link member 146) respectively connecting the lower mold seal member 144 and the lower mold base block 141 intersect each other (each link member). Are crossed at the longitudinal central portion). The intersection of the lower mold first link member 145 and the lower mold second link member 146 is pivotally supported by a link fulcrum member 148 (both link members 145 and 146 are freely rotatable around the link fulcrum member 148. Fixed in state).

  One end of the lower mold first link member 145 is an attachment / detachment direction side (hereinafter simply referred to as “attachment / removal direction”) of the lower mold chase unit 143 on the right side surface of the lower mold seal member 144 (front side in FIG. 1; hereinafter the same). At the position of the left side), and pivotally supported by the link end fixing member 147. On the other hand, a roller 149 is installed at the other end of the lower mold first link member 145. The roller 149 can freely roll inside the slide hole 141A while fitting into the slide hole 141A formed on the right side surface of the lower mold base block 141 (front side in FIG. 1; the same applies hereinafter). Yes. The slide hole 141A is formed at a position on the right side surface of the lower die base block 141 on the side opposite to the attachment / detachment direction (the opposite side to the attachment / detachment direction of the lower die chase unit 143). In this embodiment, the roller 149 is configured to freely roll in the slide hole 141A. For example, the end of the link member slides directly in the slide hole. (Hereinafter, the same applies to the slide hole 144A).

  One end of the lower mold second link member 146 is pivotally supported by a link end fixing member 147 at a position on the right side surface of the lower mold base block 141 on the attachment / detachment direction side. On the other hand, a roller 149 is installed at the other end of the lower mold second link member 146. Further, the roller 149 can freely roll inside the slide hole 144A while being fitted in the slide hole 144A provided on the right side surface of the lower mold seal member 144 on the side opposite to the attachment / detachment direction. ing.

  Further, an auxiliary member 142 is disposed between the surface of the lower mold base block 141 (the upper mold 110 side surface) and the upper surface of the lower mold seal member 144 (lower mold 140 side). The auxiliary member 142 urges the lower mold seal member 144 in the antigravity direction. Various specific configurations of the auxiliary member are conceivable, but it is also possible to use an elastic body such as rubber or a spring, and it is also possible to use a damper filled with gas. That is, the lower mold seal member 144 is prevented from closing at a stretch by its own weight, and can be opened with less external power when the lower mold seal member 144 is opened. In the present embodiment, the auxiliary members are arranged one by one near the one end side and the other end side of the first and second link members 145, 146, but the configuration is limited to such a configuration. There may be only one, or three or more.

  Next, the replacement operation of the chase unit in the molding die 101 will be described. For convenience of explanation, the lower mold 140 is used for explanation. The replacement work of the upper mold 110 is substantially the same as the replacement work of the lower mold 140 described below except that the vertical direction is reversed.

  When replacing the lower chase unit 143, open the upper mold 110 and the lower mold 140 to a predetermined position (by a press mechanism not shown), and then remove the lower chase unit that has already been mounted. After that, a new chase unit (in some cases, a new chase unit in which only a portion constituting the cavity of the chase unit is replaced) 143 is mounted.

  First, the lower mold seal member 144 needs to be opened. At this time, the person who replaces the lower chase unit 143 works while being positioned in the attaching / detaching direction of the lower chase unit 143 (left side in FIG. 1, lower left direction in FIGS. 2 and 3). The lower mold seal member 144 is opened using, for example, a handle (not shown) provided on the attachment / detachment direction side of the member 144. Here, in the lower mold 140 to which the present invention is applied, since the lower mold base block 141 and the lower mold seal member 144 are connected by the above-described opening / closing mechanism, the lower mold seal member 144 is attached in the attaching / detaching direction side (operator In this case, the entire lower mold seal member 144 is opened so as to be lifted right up (perpendicular to the lower mold base block 141). That is, the opening amount H1 on the attachment / detachment direction side (the front side for the operator) of the lower mold seal member 144 and the opening amount H2 on the anti-detachment direction (the back side for the worker) are maintained while maintaining the same state. . In addition, when the lower mold seal member is rotated and opened vertically as described above (see FIG. 5), the inner wall 144B of the lower mold seal member 144 and the side surface of the lower mold chase unit 143 are formed. The gap G1 can be designed to be small (in FIG. 3, the gap is exaggerated for convenience of explanation). That is, the effective area (surface area of the upper mold 110 side surface) of the lower mold chase unit 143 can be secured large, and if the overall size of the apparatus is the same, many or larger molded products can be formed by one press. It becomes possible to mold. Furthermore, by opening vertically, the absolute value of the amount of opening required to replace the chase unit (maximum height of the seal member when the seal member is opened (height in the vertical direction from the mold)) is reduced. The chase unit can be replaced sufficiently even if the opening width between the upper mold 110 and the lower mold 140 is small when the mold is opened. That is, the necessary space in the mold opening / closing direction (vertical direction in the present embodiment) of the entire apparatus including the molding die is minimal, and the degree of freedom of installation of the apparatus can be increased.

  In this embodiment, the lower mold seal member is lightly applied due to the presence of the auxiliary member 142 (see FIG. 1, not shown in FIG. 2) disposed between the lower mold seal member 144 and the lower mold base block 141. 144 can be opened.

  Next, the already mounted lower chase unit is removed, and a new lower chase unit 143 is attached (see FIG. 3).

  Finally, after installing a new lower mold chase unit 143, the lower mold seal member 144 is closed (lowered) to complete the replacement operation (see FIG. 3). Even when the lower mold seal member 144 is closed, the presence of the auxiliary member 142 prevents the lower mold seal member 144 from being closed at a stretch. Absent.

  Next, another embodiment of the present invention will be described with reference to FIG. FIG. 4 is a side view (right side view) of a molding die 201 showing an example of another embodiment of the present invention. In addition, about the part which is the same as that of the shaping | molding metal mold | die 101 mentioned above, or only the last two digits attach | subject the same code | symbol, description of the overlapping structure and action is abbreviate | omitted. Hereinafter, different points will be mainly described.

  In the molding die 201, the positions where the two link members (215 and 216, 245 and 246) constituting the opening and closing mechanism of the seal member (each provided in the upper die 210 and the lower die 240) intersect, This is different from the molding die 101 described above. The molding die 101 intersects at the center position of each link member, but the molding die 201 intersects at the non-center position (position shifted from the center position) of each link member. As a result, the seal members 214 and 244 do not open vertically with respect to the base blocks 211 and 241 respectively, but the opening amount H3 on the side of the chase unit attaching / detaching side (left side in FIG. It is configured to be larger than the opening amount H4 in the attaching / detaching direction (right side in FIG. 4; the same applies hereinafter).

  By adopting such a configuration, the chase unit can be replaced with a smaller opening amount of the seal member and a large effective area of the chase unit can be secured compared to the case where the seal member is simply rotated. On the other hand, since the side (front side) on which the chase unit is attached / removed opens more widely than when it is opened / closed vertically, there is an advantage that it is easy to attach / detach.

  The present invention is particularly suitable as a mold for a resin sealing device that seals a lead frame on which a semiconductor chip or the like is disposed with a resin.

Side view of a molding die showing an example of an embodiment of the present invention FIG. 2 is a perspective view of the lower mold in FIG. 1 and shows a state in the middle of mounting the chase unit (partially omitted) FIG. 2 is a perspective view of the lower mold in FIG. 1 and shows a state after the chase unit is attached (partially omitted) Side view of a molding die showing an example of another embodiment of the present invention Side view of resin molding apparatus described in Patent Document 1

Explanation of symbols

101 ... Mold for molding 110 ... Upper mold 140 ... Lower mold 111, 141 ... Base block 111A, 141A ... Slide hole 112, 142 ... Auxiliary member 113, 143 ... Chase unit 114, 144 ... Seal member 114A, 144A ... Slide hole 144B ... Seal member inner walls 115, 145 ... First link member 116, 146 ... Second link member 117, 147 ... Link end fixing member 118, 148 ... Link fulcrum member 119, 149 ... Roller

Claims (6)

A first seal member having a first mold and a first chase unit detachable from the first mold, and including the first chase unit and capable of blocking outside air is opened and closed. A molding die that can be opened and closed with respect to the first die by a mechanism,
The opening / closing mechanism includes at least a pair of rod-like connecting members that connect the first seal member and the first mold and are arranged to cross each other ,
The pair of rod-like connecting members intersect at a longitudinally non-center position of the rod-like connecting member,
The opening amount for said first mold of the first seal member, mold, characterized in that that are different for the one end and the other end of the rod-like connecting member. In claim 1,
And a second mold disposed opposite to the first mold and a second chase unit detachable from the second mold,
A second seal member that encloses the second chase unit and can block outside air can be opened and closed with respect to the second mold by an opening and closing mechanism;
The opening / closing mechanism includes at least a pair of rod-like connecting members that connect the second seal member and the second mold and are arranged so as to cross each other. Mold for molding. In claim 2 ,
Said second sealing member and the second pair of dies and a disposed linked and cross each other respective rod-like connecting member, intersect at the longitudinal center position of the rod-like connecting member,
Mold wherein the second seal member, and wherein the opening and closing in a direction perpendicular to the front Stories second mold. In claim 2 ,
Said second sealing member and the second pair of dies and a disposed linked and cross each other respective rod-like connecting member, intersect at the longitudinal non-centered position of the rod-like connecting member,
The opening amount for the previous SL second die of the second sealing member, one end and the other side in different mold, wherein the rod-like connecting member. In any one of Claims 1 thru | or 4 ,
A molding die characterized by being pivotally supported with respect to an intersection of the pair of rod-like connecting members. In any one of Claims 1 thru | or 5,
The mold for molding is characterized in that the opening / closing mechanism includes an auxiliary member that urges the seal member in the antigravity direction.

Images