JP7341115B2 - Resin powder collection member, plunger unit, resin molding device, and method for manufacturing resin molded products - Google Patents

Description

The present invention relates to a resin powder collecting member, a plunger unit, a resin molding device, and a method for manufacturing a resin molded product.

Transfer molding (also referred to as transfer molding method, etc.) is a widely used method in manufacturing resin molded products.

In transfer molding, a mechanism for collecting resin scum is sometimes used for the purpose of reducing contamination of equipment by resin scum. For example, in Patent Document 1, as shown in FIGS. 1 to 4, a container (20) for storing resin scum is placed between the tip and base of the plunger (5) via a spring (26). The resin residue in the container (20) is removed by suction by the removing means (33). The removal means (33) is composed of an air pressure feeding mechanism (34) and a suction/discharge mechanism (35). Here, resin scum refers to residual scum that is generated when the resin material inside the pot is pushed out into the cavity by the plunger, but is not transferred to the outside of the pot and enters the sliding area between the inner surface of the pot and the plunger. ). Resin scum becomes resin powder that falls from the gap between the pot and plunger of the transfer molding mold.

Patent No. 4836901

However, in order to more efficiently reduce the contamination of the apparatus by resin powder such as resin scum, it is necessary to consider collecting resin powder using another configuration.

Therefore, the present invention provides a resin powder collection member, a plunger unit, a resin molding device, and a resin molded product that can efficiently reduce contamination of equipment caused by resin powder falling from the gap between the pot and the plunger of a mold for transfer molding. The purpose is to provide a manufacturing method for.

In order to achieve this objective, the resin powder collecting member of the present invention
A resin powder collecting member used to collect resin powder falling from a gap between a pot and a plunger of a mold for transfer molding,
The resin powder collecting member includes a roof portion and a side wall portion, and can be disposed above a plunger unit to which the plunger is attached,
Resin powder can be collected in a space surrounded by the roof part and the side wall part,
A plunger mounting part insertion through hole into which the plunger mounting part of the plunger unit is inserted and a resin powder falling through hole through which the resin powder falls into the space are formed in the roof part,
The upper surface of the roof part is characterized in that it is inclined in a concave manner from the side opposite to the plunger attachment part insertion through hole and the plunger attachment part insertion through hole toward the resin powder falling through hole.

The plunger unit of the present invention is a plunger unit for transfer molding, characterized by having the resin powder collecting member of the present invention.

The resin molding apparatus of the present invention is characterized by including the plunger unit of the present invention and a mold for resin molding.

The method for manufacturing a resin molded article of the present invention is characterized by including a resin molding step of molding a resin material using the resin molding apparatus of the present invention.

According to the present invention, a resin powder collecting member, a plunger unit, a resin molding device, and a resin molded article are capable of efficiently reducing contamination of equipment caused by resin powder falling from a gap between a pot and a plunger of a mold for transfer molding. A manufacturing method can be provided.

FIG. 1 is a diagram showing an example of a resin powder collecting member of the present invention. FIG. 1(a) is a plan view. FIG. 1(b) is a bottom view. FIG. 1(c) is a side view. FIG. 1(d) is a cross-sectional view taken along the line I-I' in FIG. 1(a). FIG. 1(e) is a perspective view seen diagonally from above. FIG. 1(f) is a perspective view seen diagonally from below. FIG. 2 is a diagram showing an example of a plunger unit of the present invention. FIG. 2(a) is a perspective view. FIG. 2(b) is a perspective view seen from a different direction from FIG. 2(a). FIG. 2(c) is a left side view. FIG. 2(d) is a front view. FIG. 2(e) is a right side view. FIG. 2(f) is a cross-sectional view taken in the III-III' direction of FIG. 2(d). FIG. 2(g) is a sectional view taken in the II-II' direction of FIG. 2(c). 3A and 3B are cross-sectional views schematically showing a mechanism for collecting resin powder using the resin powder collecting member of FIG. 1 and the plunger unit of FIG. 2. FIG. FIG. 4 is a sectional view showing an example of the structure of the resin powder collecting member of the present invention. FIG. 5 is a sectional view showing a partial configuration of an example of the resin molding apparatus of the present invention. FIG. 6 is a sectional view schematically showing another example of the structure of the resin powder collecting member of the present invention and a mechanism for collecting resin powder by a plunger unit using the member. FIG. 7 is a diagram showing an example of a plunger unit without a resin powder collecting member. FIG. 7(a) is a perspective view. FIG. 7(b) is a perspective view seen from a different direction from FIG. 7(a). FIG. 7(c) is a left side view. FIG. 7(d) is a front view. FIG. 7(e) is a sectional view taken along the line V-V' in FIG. 7(d). FIG. 7(g) is a sectional view taken in the IV-IV' direction of FIG. 7(c).

Next, the present invention will be explained in more detail by giving examples. However, the present invention is not limited by the following explanation.

In the resin powder collecting member of the present invention, the resin powder falling through hole may have a slit shape, for example.

For example, when the resin powder collecting member of the present invention is projected onto a mounting surface attached to the plunger unit, the resin powder collecting member may fall from the end portion of the plunger mounting portion insertion through hole side. The distance to the through hole may be greater than the distance from the side end of the side wall portion to the resin powder falling through hole.

In the resin powder collection member of the present invention, for example, a sealing material for preventing resin powder from falling may be provided around the plunger attachment portion insertion through hole.

The plunger unit of the present invention further includes, for example, a plunger mounting portion and a hole in which the plunger mounting portion can move up and down, and a sealing material for preventing resin powder from falling is provided around the hole. You can leave it there.

The resin molding apparatus of the present invention may further include, for example, a suction mechanism for suctioning a space surrounded by the roof portion and the side wall portion.

The method for manufacturing a resin molded product of the present invention further includes, for example, a resin powder disposal step of disposing of resin powder collected in a space surrounded by the roof part and the side wall part outside the resin molding apparatus. You can stay there.

In the method for manufacturing a resin molded product of the present invention, for example, the resin molding apparatus of the present invention is a resin molding apparatus including the suction mechanism, and the resin powder disposal step is performed by stopping suction by the suction mechanism. It's okay.

In the present invention, the resin molding method uses transfer molding as described above.

In the present invention, the "molding mold" is, for example, a metal mold, but is not limited thereto, and may be, for example, a ceramic mold.

In the present invention, the resin molded product is not particularly limited, and may be, for example, a resin molded product simply molded with resin, or a resin molded product in which components such as chips are sealed with resin. In the present invention, the resin molded product may be, for example, an electronic component. The electronic component is not particularly limited and may be any electronic component, for example, any electronic component such as a chip, a wire, etc. sealed with resin. The chip is not particularly limited, and includes, for example, chips such as an IC, an LED chip, a semiconductor chip, and a semiconductor element for power control.

In the present invention, the resin material before molding and the resin after molding are not particularly limited, and may be thermosetting resins such as epoxy resins and silicone resins, or thermoplastic resins. . Alternatively, it may be a composite material partially containing a thermosetting resin or a thermoplastic resin. In the present invention, examples of the form of the resin material before molding include granular resin, liquid resin, sheet-like resin, tablet-like resin, and powdery resin. In the present invention, the liquid resin may be liquid at room temperature, and also includes molten resin that becomes liquid by being melted by heating.

In the present invention, the object to be molded by resin molding is not particularly limited, but may be, for example, a substrate. Furthermore, in the present invention, a resin molded product may be manufactured by, for example, resin-sealing (resin molding) components (for example, chips, flip chips, etc.) mounted on a substrate (molding object).

Hereinafter, specific embodiments of the present invention will be described based on the drawings. Each figure is schematically drawn with appropriate omissions or exaggerations for convenience of explanation.

In this embodiment, an example of a resin powder collecting member, a plunger unit, a resin molding apparatus, and a method for manufacturing a resin molded product according to the present invention will be described.

FIG. 1 shows an example of the resin powder collecting member of the present invention. FIG. 1(a) is a plan view. FIG. 1(b) is a bottom view. FIG. 1(c) is a side view. FIG. 1(d) is a cross-sectional view taken along the line I-I' in FIG. 1(a). FIG. 1(e) is a perspective view seen diagonally from above. FIG. 1(f) is a perspective view seen diagonally from below.

As shown in FIG. 1, this resin powder collecting member 100 includes a roof portion 110 and a side wall portion 120. In this resin powder collecting member 100, the roof part 110 and the side wall part 120 are integrally formed. As will be described later, the resin powder collecting member 100 can be placed above the plunger unit. In the space 121 surrounded by the roof part 110 and the side wall part 120, resin powder that falls from the gap between the pot and the plunger of the transfer molding mold can be collected, as will be described later. The roof portion 110 is formed with a plunger attachment insertion through hole 101 into which a plunger attachment portion of a plunger unit to be described later is inserted, and a resin powder falling through hole 102 through which the resin powder falls into the space 121. has been done. This resin powder collecting member 100 has a rectangular shape when viewed from above or below, as shown in FIGS. are arranged in series along their longitudinal centers. Although the number of plunger attachment portion insertion through holes 101 is nine in FIG. 1, it is not limited to this and may be any number. There are two through-holes 102 for resin powder falling, and the two slit-like through-holes 102 for resin powder falling are arranged in the roof part 110 so as to sandwich nine through-holes 101 for inserting plunger attachment parts arranged in series. arranged along the longitudinal direction. Although the number of resin powder falling through holes 102 is two in FIG. 1, it is not limited to this and may be any number. Further, although the resin powder falling through hole 102 has a slit shape in FIG. 1, the shape is not limited to this and may be any shape. The upper surface of the roof section 110 is sloped in a convex shape (mountain shape) from the through hole 102 for resin powder drop toward the through hole 101 for inserting the plunger mounting section, and also extends from the through hole 101 for inserting the plunger mounting section and the through hole 101 for inserting the plunger mounting section. It is inclined concavely (trough-like) from the opposite side of the through-hole 101 for resin powder to the through-hole 102 for falling resin powder. As a result, the resin powder that falls from the gap between the pot and the plunger of the mold for transfer molding is difficult to fall from the gap between the plunger mounting part insertion through hole 101 and the plunger mounting part, and the resin powder falls from the resin powder falling through hole 102. It is easy to fall into the space 121. More specifically, in the roof portion 110, a protrusion 111 is formed along the center in the longitudinal direction, and two recesses 112 are formed to sandwich the protrusion 111. The plunger attachment portion insertion through hole 101 is arranged along the convex portion 111 , and the resin powder falling through hole 102 is arranged in the recess 112 . In addition, two resin powder collection member attachment parts 103 are formed on the roof part 110 at both ends of the center in the longitudinal direction so as to sandwich nine plunger attachment part insertion through holes 101 arranged in series. has been done. The resin powder collecting member attachment part 103 has a through hole that penetrates from the upper surface to the lower surface of the roof part 110, and by passing a screw or the like through the through hole, the resin powder collecting member 100 can be attached to the plunger as described later. It can be attached to the unit body. Note that the resin powder collecting member attachment portion 103 is optional in the resin powder collecting member of the present invention, and may or may not be present, and its form, number, arrangement position, etc. are also arbitrary. However, from the viewpoint of making it easier to fix the resin powder collecting member of the present invention to the plunger unit main body, it is preferable that there is a resin powder collecting member attachment part.

FIG. 2 shows an example of the plunger unit of the present invention. FIG. 2(a) is a perspective view. FIG. 2(b) is a perspective view seen from a different direction from FIG. 2(a). FIG. 2(c) is a left side view. FIG. 2(d) is a front view. FIG. 2(e) is a right side view. FIG. 2(f) is a cross-sectional view taken in the III-III' direction of FIG. 2(d). FIG. 2(g) is a sectional view taken in the II-II' direction of FIG. 2(c). Note that although FIGS. 2(f) and (g) are cross-sectional views, hatching is omitted as appropriate for the sake of simplification of illustration. The same applies to each of the cross-sectional views shown in FIG. 3 and subsequent figures.

As illustrated, the plunger unit 200 has a plunger unit main body 210 as a main component. A cover member 220 made of rubber is fixed to the upper surface of the plunger unit main body 210. The periphery of the plunger mounting portion 201 in the plunger unit body 210 is covered with a cover member 220, thereby suppressing resin powder from entering the driving portion of the plunger mounting portion 201 (inside the illustrated hole 211). ing. Further, the plunger unit 200 includes the resin powder collecting member 100 of the present invention explained in FIG. The resin powder collecting member 100 is arranged above the plunger unit 200. More specifically, the resin powder collecting member 100 is screwed onto the upper surface of the cover member 220 by the plunger unit mounting portion 103 described in FIG. 1 . Further, a suction member 130 is attached to one end of the resin powder collecting member 100. The suction member 130 has a cavity inside, and the cavity communicates with a space 121 surrounded by the roof part 110 and the side wall part 120 of the resin powder collection member 100. The suction member 130 has a suction hole 131 through which the space 121 of the resin powder collection member 100 can be suctioned by a suction mechanism described later. The plunger unit main body 210 has nine substantially cylindrical plunger mounting portions 201 . Further, the plunger unit main body 210 has a hole 211 in its upper part, and the hole 211 penetrates to the upper surface of the cover member 220. The plunger mounting portion 201 can move up and down inside the hole 211, and the upper portion of the plunger mounting portion 201 protrudes from the upper surface of the cover member 220. As shown in FIGS. 2(f) and (g), a spring (elastic member) 212 is arranged inside the hole 211. The plunger attachment part 201 is placed on a spring 212, and the spring 212 can expand and contract as the plunger attachment part 201 moves up and down. Further, a rod-shaped lever 202 is attached to the left end of the plunger unit main body 210, and a spherical knob 203 is attached to the tip of the lever 202.

The cross-sectional view of FIG. 3(a) schematically shows a mechanism for collecting resin powder in the resin molding apparatus of the present invention including the plunger unit 200 of FIG. 2. The cross-sectional view of FIG. 3(a) is an enlarged view of the upper part of the same cross-sectional view as FIG. 2(f). That is, this figure is a cross-sectional view taken in a direction perpendicular to the direction in which the plunger attachment parts 201 are lined up and at the position of the diameter of the plunger attachment part insertion through hole 101. The space 121 within the resin powder collection member 100 is connected to a suction mechanism 800 via a suction path 801, and the suction mechanism 800 can suck the inside of the space 121 to reduce the pressure. The suction path 801 communicates with the inside of the space 121 via the suction member 130 and the suction hole 131 (not shown in FIG. 3A) described in FIG. 2. Further, the suction mechanism 800 is not particularly limited, and may be, for example, a suction pump, a vacuum pump, or the like. Moreover, the resin molding apparatus further includes a plunger, a pot, and a mold, which are not shown in FIG. 3(a). The plunger is attached to the upper end of the plunger attachment part 201. The plunger can move up and down inside the pot by moving the plunger attachment part 201 up and down. A resin material can be contained within the pot. By raising the plunger, the resin material inside the pot can be supplied into the mold and resin molded. The configurations of the plunger, pot, and mold are not particularly limited, and may be similar to, for example, a general resin molding apparatus for transfer molding.

An example of the method for manufacturing a resin molded product of the present invention using the resin molding apparatus of the present invention and collection of resin powder will be described with reference to FIG. 3(a). First, a resin molding step is performed in which a resin material is molded using a resin molding device. This resin molding step is not particularly limited, and can be performed, for example, by a method similar to general transfer molding. As described above, by raising the plunger, the resin material inside the pot can be supplied into the mold, and thereby a resin molding process can be performed and a resin molded product can be manufactured. In this resin molding process, resin powder 10a falls from the gap between the plunger and the pot onto the roof 110 of the resin powder collecting member 100 as shown in the figure. As described above, the top surface of the roof portion 110 slopes convexly (mountain-like) toward the plunger attachment insertion through-hole 101 and concavely (valley-like) toward the through-hole 102 for resin powder fall. are doing. That is, the upper surface of the roof portion 110 is at its lowest point at the through hole 102 for falling resin powder. Therefore, the resin powder 10a falls toward the resin powder falling through hole 102 as shown in the figure. Further, the resin powder 10a falls into the space 121 of the resin powder collecting member 100 from the resin powder falling through hole 102. At this time, by reducing the pressure in the space 121 by suctioning the inside of the space 121, it becomes easier for the resin powder 10a to fall into the space 121, making it easier to collect the resin powder 10a. Note that in the present invention, the suction mechanism 800 is optional and may or may not be present. Also, suction by the suction mechanism 800 is optional, and may or may not be performed. However, as described above, it is preferable to perform suction using the suction mechanism 800 because it makes it easier to collect the resin powder 10a. Furthermore, the timing at which the suction mechanism 800 performs suction is not particularly limited. For example, before performing the resin molding process, it is preferable to use the suction mechanism 800 to suction the inside of the space 121 to reduce the pressure. Further, it is preferable that the reduced pressure in the space 121 due to this suction be maintained until the resin molding process is completed. Note that the resin powder 10a in the space 121 is collected by suction by the suction mechanism 800. Furthermore, in the method for manufacturing a resin molded product, after the resin molding step, there is further a resin powder disposal step in which the resin powder 10a collected by the suction mechanism 800 from within the space 121 of the resin powder collection member 100 is disposed of outside the resin molding apparatus. You may do so. This resin powder disposal step may be performed by stopping the suction by the suction mechanism 800. This resin powder disposal process may be performed automatically, for example, and the method is not particularly limited. For example, the resin powder 10a collected from the space 121 by the suction mechanism 800 is It may be removed by suction using a suction mechanism (not shown). In this case, in order to keep the dust collection power high, it is preferable that the suction by the suction mechanism 800 be performed while stopping the suction by another suction mechanism for removing the resin powder 10a.

A modification of FIG. 3(a) is shown in the sectional view of FIG. 3(b). As shown, the plunger unit 200 in FIG. 3(b) is the same as the plunger unit 200 in FIG. 3(a), except that it includes sealing materials (O-rings) 701 and 702 for preventing resin powder from falling. As shown, the O-ring 701 is provided around the hole 211 (the hole in which the plunger mounting portion 201 can move up and down) of the plunger unit main body 210 and the cover member 220. The O-ring 701 can further reduce the resin powder 10a falling into the hole 211. Further, the O-ring 702 constitutes a part of the resin powder collecting member 100. The resin powder collecting member 100 in FIG. 3(b) is the same as the resin powder collecting member 100 in FIGS. 1, 2, and 3(a) except that it includes an O-ring 702. As shown in the figure, the O-ring 702 is provided around the plunger attachment portion insertion through hole 101. The O-ring 702 can further prevent the resin powder 10a from falling into the plunger attachment insertion through hole 101. The method of manufacturing a resin molded product using the resin molding apparatus including the plunger unit shown in FIG. 3(b) and the method of collecting resin powder are not particularly limited, and for example, the same method as shown in FIG. 3(a) is used. be able to.

Note that the configuration of the resin molding apparatus of the present invention is not particularly limited and is arbitrary, except that it includes the plunger unit of the present invention and a mold for resin molding. For example, the configuration of the resin molding apparatus of the present invention may be the same as that of a general resin molding apparatus for transfer molding, except that the plunger unit is the plunger unit of the present invention. For example, the resin molding apparatus of the present invention including the plunger unit 200 of FIG. 2 may further include a plunger, a pot, and a mold, as described above. The cross-sectional view of FIG. 5 shows an example of the configuration of such a resin molding apparatus. In the figure, only the main parts of the resin molding apparatus are shown. As shown in the figure, the main components of this resin molding apparatus 1000 are a plunger unit 200, a base member 300, a plunger 400, a mold composed of a lower mold 500 and an upper mold 600, and a lower mold chase holder 510. shall be. A space for arranging the plunger unit 200 is formed in the center of the base member 300, and the plunger unit 200 is arranged within the space. Plunger 400 is attached to the upper end of plunger attachment portion 201 in plunger unit 200. A lower chase folder 510 is placed on the base member 300. A lower die 500 is placed on the lower die chase folder 510. Furthermore, an upper mold 600 is arranged above the lower mold 500. A mold cavity 601 is formed in the mold surface of the upper mold 600 (the surface facing the lower mold 500), and resin molding can be performed within the mold cavity 601. A through hole 501 is formed in the lower mold 500, and the through hole 501 serves as a pot for storing a resin material. The plunger 400 can move up and down inside the through hole 501. By moving the lower mold 500 up and down together with the base member 300 and the lower mold chase holder 510, the lower mold 500 and the upper mold 600 can be clamped and opened. As shown in the figure, resin molding can be performed by clamping the molds and bringing the upper surface of the lower mold 600 into contact with the mold surface of the upper mold 600. More specifically, by raising the plunger 400 in this state, the resin material 10 in the through hole 501 (pot) can be injected into the mold cavity 601 and resin molding can be performed. Although the resin material 10 in the figure is a liquid resin, for example, it may be a resin that is liquid at room temperature, or it may be a resin that is heated and melted to become a liquid. The method of manufacturing a resin molded product using this resin molding apparatus and the method of collecting resin powder are not particularly limited, and can be performed, for example, as described using FIG. 3(a) above.

Further, FIG. 7 shows an example of the configuration of a plunger unit without a resin powder collecting member. FIG. 7(a) is a perspective view. FIG. 7(b) is a perspective view seen from a different direction from FIG. 7(a). FIG. 7(c) is a left side view. FIG. 7(d) is a front view. FIG. 7(e) is a sectional view taken along the line V-V' in FIG. 7(d). FIG. 7(g) is a sectional view taken in the IV-IV' direction of FIG. 7(c). The plunger unit 200a shown in FIG. 7 is the same as the plunger unit 200 shown in FIG. be. The cover member 220a is the same as the cover member 220 of FIG. 2 except that it does not have a screw hole for attaching the resin powder collecting member 100.

When a resin molded product is manufactured using a plunger unit that does not have a resin powder collection member as shown in FIG. 7, the resin powder that falls from the gap between the pot and the plunger will accumulate on the upper surface of the cover member 200. . It is necessary to periodically manually clean and remove the resin powder accumulated on the upper surface of the cover member 200. If resin powder accumulated due to insufficient cleaning falls from the top surface of the cover member 200 and enters the isobaric device part in the plunger body or the drive part of the plunger mounting part 201 (inside the hole 211 shown in the figure), the plunger may malfunction. There is a risk of connection. Therefore, as explained in FIGS. 1 to 3, if the collection member 100 of the present invention is used, it is possible to reduce the resin powder 10a from falling from the upper surface of the cover member 200, so that the resin powder 10a It is possible to reduce the possibility of the plunger entering the driving part of the plunger mounting part 201, and it is also possible to reduce malfunction of the plunger. If the resin powder collecting member of the present invention is used, it is not necessary to clean the resin powder more frequently than in the case where the resin powder collecting member is not provided as shown in FIG. Therefore, according to the present invention, resin powder can be collected efficiently, and as a result, resin molded products can be manufactured efficiently. Further, according to the present invention, for example, as described above, it is also possible to automatically remove accumulated resin powder by suction or the like. According to this, the resin powder can be collected more efficiently.

Further, the resin powder collecting member of the present invention has a roof portion as described above. Thereby, at the upper end of the resin powder collecting member of the present invention, the portion other than the plunger attachment portion insertion through hole and the resin powder falling through hole can be kept closed at all times. Thereby, for example, when suction or pressure feeding of air is performed, the resin powder contained in the resin powder collecting member can be prevented from flying up to the outside of the collecting member from above. Thereby, for example, it is also possible to collect resin powder more efficiently than in Patent Document 1.

In addition, the resin powder collecting member of the present invention, for example, as described above, when the resin powder collecting member is projected onto the mounting surface to be attached to the plunger unit, the resin powder is collected from the end portion of the plunger mounting portion insertion through hole side. The distance to the falling through hole may be greater than the distance from the side end of the side wall to the resin powder falling through hole. An example is shown in the cross-sectional view of FIG. FIG. 4 is a sectional view showing only the resin powder collecting member 100 and the plunger attachment portion 201 in FIG. 2(f) or FIG. 3(a). As shown in the figure, when the resin powder collecting member 100 is projected onto the mounting surface 140 attached to the plunger unit main body 210, the resin powder falls from the end on the side of the plunger mounting part insertion through hole 101. The distance l2 from the side end of the side wall portion 120 to the resin powder falling through hole 102 is larger than the distance l1 from the side end of the side wall portion 120 to the resin powder falling through hole 102. As a result, as shown in the figure, the slope angle φ of the slope from the end on the side of the plunger attachment portion insertion through hole 101 to the resin powder falling through hole 102 becomes gentle. Therefore, the resin powder falling vertically from the sliding gap in which the plunger slides (up and down) is transferred from the gap between the plunger mounting part 201 and the plunger mounting part insertion through hole 101 into the space of the resin powder collecting member 100. 121 can be reduced. This makes it possible to reduce the amount of resin powder that accumulates in the region X inside the space 121 around the plunger attachment part 201 in the space 121. Therefore, resin powder can be prevented from entering the hole 211 (the hole in which the plunger mounting portion 201 can move up and down, see FIG. 2) of the plunger unit main body 210 and the cover member 220. Therefore, it is possible to further reduce the resin powder from entering the isobaric device part in the plunger main body or the drive part of the plunger mounting part 201, and it is possible to further reduce the malfunction of the plunger. Further, by using one or both of the O-rings 701 and 702 shown in FIG. 3(b) in combination, it is possible to further effectively reduce resin powder from entering the hole 211 of the plunger unit main body 210 and the cover member 220. In addition, in the resin powder collection member 100 of FIG. 4, as shown in the figure, the inclination angle θ of the inclined surface (outer inclined surface) from the side end of the side wall portion 120 to the through hole 102 for resin powder falling, and the insertion of the plunger mounting portion The relationship with the inclination angle φ of the inclined surface (inner inclined surface) from the side end of the through-hole 101 for resin powder to the through-hole 102 for resin powder falling is θ>φ. Further, the relationship between the height t1 from the bottom of the roof to the apex of the outer slope and the height t2 from the bottom of the roof to the apex of the inner slope is t1>t2. Further, in the figure, only the dimensions of the left half of the resin powder collecting member 100 are shown, but since it is symmetrical, the right half has the same dimensions as the left half.

Further, the structure, shape, manufacturing method, etc. of the resin powder collecting member of the present invention are not limited to the examples shown in FIGS. 1 to 4. For example, the resin powder collecting member 100 shown in FIGS. 1 to 4 can be manufactured by cutting a block-shaped metal material. However, the resin powder collecting member of the present invention is not limited to this, and may be manufactured by plastic processing such as sheet metal processing of bending a flat metal material, for example. The cross-sectional view of FIG. 6 shows an example of the structure of such a resin powder collection member of the present invention, and also schematically shows a mechanism for collecting resin powder using a plunger unit. FIG. 6 is a diagram showing a state in which the resin powder collecting member 100a of the present invention is attached to the plunger unit 200 of FIG. 2. FIG. 6 is the same as FIG. 3(a) except that the resin powder collecting member 100 is changed to a resin powder collecting member 100a. Furthermore, the method for manufacturing a resin molded product using the resin molding apparatus including the plunger unit shown in FIG. 6 and the method for collecting resin powder are not particularly limited, and for example, the same method as shown in FIG. 3(a) may be used. I can do it. The resin powder collecting member 100a is the same as the resin powder collecting member 100 of FIGS. be. The roof portion 110a is similar to the roof portion 110 except that the shape is a flat plate. The shape of the upper surface of the roof portion 110a is similar to the roof portion 110 of the resin powder collection member 100. That is, like the roof part 110, the upper surface of the roof part 110a is sloped in a convex shape (mountain shape) toward the through hole 101 for inserting the plunger attachment part, and is concave (in a mountain shape) toward the through hole 102 for falling resin powder. It slopes in a valley-like manner. This makes it easier for the resin powder 10a to fall toward the resin powder falling through hole 102. In addition, in the roof part 110a of FIG. 6, in the through hole 102 for resin powder falling, the end of the roof part 110a on the outside (side wall part 120a side) is inside (the side of the through hole 101 for plunger attachment part insertion). ) is inserted below the edge. Such a configuration makes it difficult for the resin powder 10a that has entered the space 121 to come out from the resin powder falling through hole 102. Further, the resin powder collecting member 100a can be manufactured, for example, by plastic working such as sheet metal working in which a flat metal material is bent, as described above. More specifically, for example, holes are formed in a single metal flat plate to form a through hole 101 for inserting the plunger mounting portion, a through hole 102 for resin powder drop, etc., and the single metal flat plate is The roof portion 110a and the side wall portions 120a can be formed by bending the shaped material. Furthermore, the method for manufacturing the resin powder collecting member of the present invention is not limited to plastic processing such as cutting of a metal block material and sheet metal processing of bending a metal flat material, but any other manufacturing method other than these. It may be manufactured by

Although the present invention has been described above with reference to Examples, the present invention is not limited to the above-mentioned Examples. For example, in the resin powder collecting member of the present invention, the number of resin powder falling through holes is not particularly limited and is arbitrary, as described above. For example, in FIGS. 1 to 4 and 6, a slit (elongated hole) shaped resin powder is provided on each side of the plunger mounting part insertion through hole 101 so that the resin powder 10a easily falls from the resin powder falling through hole 102. One through hole 102 for dropping is provided. However, the present invention is not limited thereto, and for example, a plurality of through holes for resin powder falling may be provided on both sides of the plunger attachment portion insertion through hole. Further, although the resin powder collecting member of the present invention includes the roof portion and the side wall portion as described above, the bottom portion may not be provided. For example, as shown in FIGS. 2, 3, and 6, by fixing the resin powder collecting member 100 or 100a to the upper surface of the cover member 220, the upper surface of the cover member 220 can be used as the bottom surface of the resin powder collecting member 100 or 100a. This is to fulfill the functions of However, the present invention is not limited thereto, and for example, the resin powder collecting member may have a bottom portion.

Furthermore, the present invention is not limited to the above-mentioned embodiments, and can be arbitrarily combined, changed, or selected as necessary and adopted without departing from the spirit of the present invention. It is something.

10 Resin material 10a Resin powder 100, 100a Resin powder collecting member 101 Plunger mounting part insertion through hole 102 Resin powder falling through hole 103 Plunger unit mounting part 110, 110a Roof part 111 Roof part convex part 112 Roof part concave part 120, 120a Side wall part 121 Space surrounded by roof part and side wall part 130 Suction member 131 Suction hole 140 Mounting surface 200, 220a where resin powder collection member 100 is attached to plunger unit main body 210 Plunger unit 201 Plunger mounting part 202 Lever 203 Knob 210 Plunger unit body 211 Hole 212 Spring (elastic member)
220, 220a Cover member 300 Base member 400 Plunger 500 Lower mold 501 Through hole (pot)
510 Lower die chase holder 600 Upper die 601 Mold cavities 701, 702 O-ring 800 Suction mechanism 801 Suction path 1000 Resin molding device

Claims (10)

A resin powder collecting member used to collect resin powder falling from a gap between a pot and a plunger of a mold for transfer molding,
The resin powder collecting member includes a roof part and a side wall part, and can be disposed on the upper part of the plunger unit to which the plunger is attached,
Resin powder can be collected in a space surrounded by the roof part and the side wall part,
A plunger mounting part insertion through hole into which the plunger mounting part of the plunger unit is inserted and a resin powder falling through hole through which the resin powder falls into the space are formed in the roof part,
The upper surface of the roof portion is sloped concavely from the side opposite to the plunger attachment insertion through hole and the plunger attachment insertion through hole toward the resin powder falling through hole. Parts for collecting powder. The resin powder collection member according to claim 1, wherein the resin powder falling through hole has a slit shape. When the resin powder collecting member is projected onto the mounting surface to be attached to the plunger unit, the distance from the end of the plunger mounting part insertion through hole to the resin powder falling through hole is equal to the side end of the side wall part. The resin powder collecting member according to claim 1 or 2, wherein the distance is greater than the distance from the through hole for resin powder falling. A plunger unit for transfer molding, comprising the resin powder collecting member according to any one of claims 1 to 3. The plunger unit according to claim 4, further comprising a plunger mounting portion and a hole in which the plunger mounting portion can move up and down, and a sealing material for preventing resin powder from falling is provided around the hole. . A resin molding apparatus comprising the plunger unit according to claim 4 or 5 and a mold for resin molding. The resin molding apparatus according to claim 6, further comprising a suction mechanism for suctioning a space surrounded by the roof portion and the side wall portion. A method for manufacturing a resin molded article, comprising a resin molding step of molding a resin material using the resin molding apparatus according to claim 6 or 7. 9. The method for manufacturing a resin molded product according to claim 8, further comprising a resin powder disposal step of discarding resin powder collected in a space surrounded by the roof part and the side wall part outside the resin molding apparatus. A resin molding step of molding a resin material using the resin molding apparatus according to claim 7,
Further, the method further includes a resin powder disposal step of disposing of resin powder collected in a space surrounded by the roof part and the side wall part outside the resin molding apparatus,
The method for manufacturing a resin molded product, wherein the resin powder disposal step is performed by stopping suction by the suction mechanism.

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