TWI802094B - Part for collecting resin powder, piston unit, resin molding device, and manufacturing method of resin molded product - Google Patents

Abstract

To provide a resin powder collection member capable of efficiently reducing contamination of the device by resin powder falling from the gap between a tank and a piston of a molding die for transfer molding. The component for collecting resin powder is characterized in that the component for collecting resin powder includes a ceiling part and a side wall part, and can be arranged on the upper part of the piston unit where the piston is installed, and the resin powder can be collected in the space surrounded by the ceiling part and the side wall part , A through hole for inserting the piston mounting part for inserting the piston mounting part of the piston unit is formed in the ceiling part, a through hole for dropping the resin powder is used for dropping the resin powder into the space, and the upper surface of the ceiling part is used for inserting from the piston mounting part The side opposite to the through-hole and the through-hole for inserting the piston mounting portion is inclined to be concavely inclined toward the through-hole for dropping the resin powder.

Description

Part for collecting resin powder, piston unit, resin molding device, and manufacturing method of resin molded article

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

In the manufacture of resin molded products, transfer molding (also called transfer molding, etc.) is a widely used method.

In the transfer molding method, in order to reduce contamination of the equipment by resin residue, a structure for collecting resin residue is used. For example, in Patent Document 1, as shown in Figures 1-4, a container (20) for storing resin slag is provided via a spring (26) in the middle part between the front end and the bottom end of the piston (5), and the container (20) The resin residue is removed by suction with the removal unit (33). The removal unit (33) is composed of an air pressure feeding mechanism (34) and a suction discharge mechanism (35). Here, the resin slag refers to the sliding part between the inner surface of the pot and the piston without being transported out of the pot when the resin material in the pot is squeezed into the cavity by the piston resulting residue (residue). The resin slag is resin powder falling from the gap between the pot and the piston of the transfer molding die.

[Prior Art Literature] [Patent Document] Patent Document 1: Patent No. 4836901.

[Problem to be solved by the invention]

However, in order to more efficiently reduce the pollution of the device by the resin powder such as resin slag, it is necessary to investigate the collection of the resin powder by other structures.

Therefore, an object of the present invention is to provide a resin powder collecting member, a piston unit, a resin molding device and A method of manufacturing a resin molded product. [Means to solve the problem]

In order to achieve this object, the resin powder collecting member of the present invention is a resin powder collecting member for collecting resin powder dropped from a gap between a tank and a piston of a molding die for transfer molding, It is characterized by The resin powder collecting part includes a ceiling part and a side wall part, and can be arranged on the upper part of the piston unit on which the piston is installed, the resin powder can be collected in the space enclosed by the ceiling portion and the side wall portion, A through-hole for inserting the piston attachment portion for inserting the piston attachment portion of the piston unit and a through-hole for dropping the resin powder into the space are formed in the ceiling portion, The upper surface of the ceiling part is sloped in a concave shape from the side opposite to the through-hole for inserting the piston attachment part and the through-hole for inserting the piston attachment part toward the through-hole for dropping the resin powder.

The piston unit of the present invention is a piston unit for transfer molding comprising the resin powder collecting member of the present invention.

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

The method of 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. [Efficacy of the invention]

According to the present invention, it is possible to provide a resin powder collecting member, a piston unit, a resin molding device, and a resin molding device capable of efficiently reducing contamination of the device by resin powder falling from the gap between the tank and the piston of a molding die for transfer molding. The method of manufacture of the product.

Next, examples are given to further describe the present invention in detail. However, the present invention is not limited to the following description.

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

The resin powder collecting member of the present invention, for example, when the resin powder collecting member is mounted on the mounting surface of the piston unit, is projected from the end of the piston mounting part insertion through hole side to the resin powder dropping part. The distance of the through hole may be greater than the distance from the side end of the side wall portion to the through hole for dropping resin powder.

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 through-hole for inserting the piston mounting portion.

The piston unit of the present invention further includes, for example, a piston mounting portion and a hole in which the piston mounting portion can move up and down, and a sealing material for preventing resin powder from falling may be provided around the hole.

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

The method for manufacturing a resin molded article of the present invention may further include, for example, a resin powder disposal step of discarding the resin powder collected in the space surrounded by the ceiling portion and the side wall portion to the outside of the resin molding device.

In the method for manufacturing a resin molded product of the present invention, for example, the resin molding device of the present invention is a resin molding device including the suction mechanism, and the resin powder discarding step may be performed after stopping the suction of the suction mechanism. later.

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

In the present invention, the "molding die" is, for example, a metal die, but is not limited thereto, and may be, for example, a pottery die or the like.

In the present invention, the resin molded product is not particularly limited, and may be, for example, a resin molded product in which only resin is molded, or a resin molded product in which components such as a wafer are resin-sealed. In the present invention, the resin molded product may be, for example, an electronic component or the like. The electronic component is not particularly limited, and is arbitrary, for example, any electronic component obtained by sealing arbitrary components such as a chip and an electric wire with a resin. The wafer is not particularly limited, and examples thereof include wafers such as ICs, LED wafers, semiconductor wafers, and semiconductor elements for controlling electric power.

In the present invention, the resin material before molding and the resin after molding are not particularly limited, for example, they may be thermosetting resins such as epoxy resin or silicone resin, or thermoplastic resins. In addition, a composite material containing a part of thermosetting resin or thermoplastic resin may also be used. In the present invention, the form of the resin material before molding includes, for example, granular resin, liquid resin, sheet-like resin, plate-like resin, powdery resin, and the like. In addition, in the present invention, the liquid resin may be liquid at normal temperature, and includes molten resin that is liquid after heating and melting.

In the present invention, the object to be molded by resin molding is not particularly limited, and may be, for example, a substrate. In addition, in the present invention, for example, components (for example, wafers, flip chips, etc.) mounted on a substrate (object to be molded) can be resin-sealed (resin molded) to manufacture a resin molded product.

Hereinafter, specific embodiments of the present invention will be described based on drawings. For convenience of description, each figure is appropriately omitted, exaggerated, etc., and is schematically described.

[Example]

In this example, an example of the resin powder collecting member, the piston unit, the resin molding device, and the manufacturing method of the resin molded article of the present invention will be described.

FIG. 1 shows an example of the member for resin powder collection of this invention. (a) of Figure 1 is a plan view. (b) of Fig. 1 is a bottom view. (c) of Fig. 1 is a side view. (d) of Fig. 1 is a sectional view viewed from the I-I' direction of (a) of Fig. 1 . (e) of Fig. 1 is a perspective view seen from obliquely above. (f) of Fig. 1 is a perspective view viewed obliquely from below.

As shown in FIG. 1 , this resin powder collection member 100 includes a ceiling portion 110 and a side wall portion 120 . In this resin powder collecting member 100 , the ceiling portion 110 and the side wall portion 120 are integrally formed. As will be described later, the resin powder collecting member 100 may be disposed on the upper portion of the piston unit. In the space 121 enclosed by the ceiling part 110 and the side wall part 120, as will be described later, resin powder falling from the gap between the tank and the piston of the transfer molding mold can be collected. The ceiling part 110 is formed with a through-hole 101 for inserting a piston mounting part for inserting a piston mounting part of a piston unit which will be described later, and a through-hole 102 for dropping resin powder into the space 121 . As shown in (a) and (b) of FIG. 1 , the resin powder collection member 100 is rectangular when viewed from above or below, and the nine through-holes 101 for inserting the piston mounting part are along the center of the longitudinal direction of the ceiling part 110. In-line configuration. In addition, in FIG. 1, although the number of through-holes 101 for piston attachment part insertion is 9, it is not limited to this, and it is arbitrary. There are two through-holes 102 for dropping the resin powder, and the two slit-shaped through-holes 102 for dropping the resin powder are along the length of the ceiling portion 110 in a manner of interposing the nine piston mounting portion insertion through-holes 101 arranged in a row. Edge configuration. In addition, in FIG. 1 , the number of through-holes 102 for dropping resin powder is two, but it is not limited thereto and is arbitrary. In addition, in FIG. 1, the shape of the through-hole 102 for resin powder drop is a slit shape, but it is not limited to this, and it is arbitrary. The upper surface of the ceiling part 110 is inclined in a convex shape (mountain shape) from the through-hole 102 for resin powder drop toward the through-hole 101 for piston mounting part insertion, and the through-hole 101 for piston mounting part insertion and the through-hole for piston mounting part insertion are simultaneously inclined. The side opposite to 101 is inclined in a concave shape (valley shape) toward the resin powder dropping through-hole 102 . Thus, the resin powder dropped from the gap between the tank and the piston of the molding die for transfer molding is difficult to fall into the gap between the through-hole 101 for inserting the piston mounting part and the piston mounting part, and at the same time, it is easy to fall from the gap between the piston mounting part. The through hole 102 falls into the space 121 . More specifically, a convex portion 111 is formed along the center of the ceiling portion 110 in the longitudinal direction, and two concave portions 112 are formed via the convex portion 111 . Further, the through-hole 101 for inserting the piston attachment portion is arranged along the convex portion 111 , and the through-hole 102 for dropping the resin powder is arranged in the concave portion 112 . In addition, two resin powder collecting member mounting portions 103 are formed at both ends of the ceiling portion 110 at the center in the longitudinal direction so as to sandwich the nine piston mounting portion insertion through-holes 101 arranged in a row. The resin powder collection member mounting part 103 has a through hole penetrating from the upper surface to the lower surface of the ceiling part 110, and by passing a screw or the like through the through hole, the resin powder collection member 100 can be attached to the resin powder collection member as described later. Piston unit body. In addition, the component mounting part 103 for resin powder collection is optional in the component for resin powder collection of this invention, and it is optional, and its form, number, arrangement|positioning position, etc. are also arbitrary. However, it is preferable to have a resin powder collecting member attachment portion from the viewpoint of easy fixing of the resin powder collecting member of the present invention to the piston unit main body and the like.

Fig. 2 shows an example of the piston unit of the present invention. (a) of Fig. 2 is a perspective view. (b) of Fig. 2 is a perspective view viewed from a direction different from that of (a) of Fig. 2 . (c) of Fig. 2 is a left side view. (d) of Fig. 2 is a front view. (e) of Fig. 2 is a right side view. (f) of Fig. 2 is a sectional view viewed from the III-III' direction of (d) of Fig. 2 . (g) of Fig. 2 is a cross-sectional view viewed from the direction II-II' of (c) of Fig. 2 . In addition, (f) and (g) of FIG. 2 are cross-sectional views, but hatching is appropriately omitted for the sake of simplicity of illustration. The same is true for each cross-sectional view after FIG. 3 .

As shown in the figure, the main component of this piston unit 200 is a piston unit main body 210 . A rubber cover member 220 is fixed to the upper surface of the piston unit main body 210 . The periphery of the piston mounting portion 201 of the piston unit main body 210 is covered by the cover member 220 , thereby preventing resin powder from entering the driving portion of the piston mounting portion 201 (inside the hole 211 in the figure). Furthermore, the piston unit 200 has the resin powder collecting member 100 of the present invention explained in FIG. 1 . The resin powder collecting member 100 is arranged on the upper part of the piston unit 200 . More specifically, the resin powder collection member 100 is fixed to the upper surface of the cover member 220 with a set screw by the resin powder collection member mounting portion 103 described in FIG. 1 . In addition, a suction member 130 is attached to one end of the resin powder collecting member 100 . The inside of the suction member 130 is a cavity, and the cavity communicates with the space 121 surrounded by the ceiling portion 110 and the side wall portion 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 sucked by a suction mechanism described later. The piston unit main body 210 has nine approximately cylindrical piston mounting parts 201 . In addition, the piston unit main body 210 has a hole 211 in its upper portion, and the hole 211 penetrates to the upper surface of the cover member 220 . The piston mounting part 201 can move up and down inside the hole 211 , and the upper part of the piston mounting part 201 protrudes from the upper surface of the cover member 220 . As shown in (f) and (g) of FIG. 2 , a spring (elastic member) 212 is disposed inside the hole 211 . The piston mounting part 201 is placed on the spring 212, and the spring 212 can expand and contract while the piston mounting part 201 moves up and down. In addition, a rod-shaped rod 202 is attached to the left end of the piston unit main body 210 , and a spherical knob 203 is further attached to the tip of the rod 202 .

The sectional view of (a) of FIG. 3 schematically shows a resin powder collection structure in the resin molding device of the present invention including the piston unit 200 of FIG. 2 . The cross-sectional view of (a) of FIG. 3 is an enlarged view of the upper part in the same cross-sectional view as that of (f) of FIG. 2 . That is, this figure is a cross-sectional view showing a state cut in a direction perpendicular to the direction in which the piston mounting portions 201 are arranged and at a radial position of the piston mounting portion insertion through hole 101 . The space 121 in the resin powder collecting member 100 is connected to the suction mechanism 800 through the suction path 801, and the space 121 can be sucked by the suction mechanism 800 to reduce the pressure. The suction path 801 communicates with the inside of the space 121 through the suction member 130 and the suction hole 131 (not shown in FIG. 3( a )) explained in FIG. 2 . In addition, the suction mechanism 800 is not particularly limited, and may be, for example, a suction pump, a vacuum pump, or the like. In addition, the resin molding device further has a piston, a tank, and a molding die that are not shown in FIG. 3( a ). The piston is mounted on the upper end of the piston mounting part 201 . With the up and down movement of the piston installation part 201, the piston can move up and down inside the tank. The resin material can be accommodated in the material tank. By the rise of the piston, the resin material inside the tank can be supplied to the molding die for resin molding. The configurations of the piston, pot, and molding die are not particularly limited, and may be, for example, the same as those of a conventional resin molding device for transfer molding.

Using FIG. 3( a ), an example of a method for producing a resin molded article of the present invention and collection of resin powder using the resin molding apparatus of the present invention will be described. First, a resin molding step of molding a resin material using a resin molding device is performed. This resin molding step is not particularly limited, and can be performed, for example, by the same method as conventional transfer molding. As described above, the resin material inside the tank can be supplied into the molding die by the piston rising, thereby enabling the resin molding step to produce a resin molded product. In this resin molding step, the resin powder 10a drops from the gap between the piston and the tank onto the ceiling portion 110 of the resin powder collecting member 100 as shown in the figure. As described above, the upper surface of the ceiling portion 110 is sloped convexly (mountain-shaped) toward the through-hole 101 for inserting the piston attachment portion, and sloped concavely (valley-shaped) toward the through-hole 102 for resin powder drop. That is, on the upper surface of the ceiling part 110, the part of the through-hole 102 for resin powder drop is the lowest. Therefore, as shown in the figure, the resin powder 10a falls to the through-hole 102 for resin powder drop. Furthermore, the resin powder 10 a falls into the space 121 of the member 100 for resin powder collection from the through-hole 102 for resin powder drop. At this time, the space 121 is sucked by the suction mechanism to reduce the pressure, so that the resin powder 10a can be easily dropped into the space 121, and the resin powder 10a can be easily collected. In addition, in the present invention, the suction mechanism 800 is optional and dispensable. In addition, the suction by the suction mechanism 800 is also optional, and it does not matter whether it is performed or not. However, as mentioned above, it is preferable to collect the resin powder 10a more easily if the suction is performed by the suction mechanism 800 . In addition, the timing of suction by the suction mechanism 800 is not particularly limited. For example, it is preferable to depressurize the space 121 by suctioning the inside of the space 121 by the suction mechanism 800 before performing the resin molding step. In addition, it is preferable to continue to depressurize the space 121 by this suction until the resin molding process is complete|finished. In addition, the resin powder 10 a in the space 121 can be collected by the suction of the suction mechanism 800 . Furthermore, in the method of manufacturing a resin molded article, after the resin molding step, the resin powder 10a collected from the space 121 of the resin powder collecting member 100 by the suction mechanism 800 may be further discarded to the outside of the resin molding device. Resin powder disposal procedure. This resin powder discarding step can be performed, for example, after stopping the suction of the suction mechanism 800 . This resin powder discarding step, for example, can be carried out automatically, and the method is not particularly limited. For example, the resin powder 10a collected from the space 121 by the suction mechanism 800 can be passed through other suction mechanisms except the suction mechanism 800 (not shown in the figure). shown) to remove by suction. At this time, in order to maintain high dust collecting power, it is preferable to perform suction by the suction mechanism 800 after stopping the suction of other suction mechanisms for removing the resin powder 10a.

The cross-sectional view of (b) of FIG. 3 shows a modified example of (a) of FIG. 3 . As shown in the figure, the piston unit 200 in (b) of FIG. 3 is the same as the piston unit 200 in (a) in FIG. As shown in the figure, an O-ring 701 is provided around the piston unit main body 210 and the hole 211 of the cover member 220 (the hole in which the piston mounting part 201 can move up and down inside). The O-ring 701 can further reduce the resin powder 10 a from falling into the hole 211 . In addition, the O-ring 702 constitutes a part of the resin powder collecting member 100 . The member 100 for resin powder collection of FIG.3(b) is the same as the member 100 for resin powder collection of FIG.1, FIG.2 and FIG.3(a) except having the O-ring 702. As shown in the figure, the O-ring 702 is provided around the through-hole 101 for inserting the piston mounting portion. The O-ring 702 can further reduce the drop of the resin powder 10 a into the through-hole 101 for inserting the piston attachment portion. The method of manufacturing the resin molded product and the method of collecting the resin powder using the resin molding device including the piston unit in FIG.

In addition, the configuration of the resin molding apparatus of the present invention is not particularly limited except that it includes the piston unit of the present invention and a molding die for resin molding, and is arbitrary. For example, the configuration of the resin molding apparatus of the present invention may be the same as that of a conventional resin molding apparatus for transfer molding except that the piston unit is the piston unit of the present invention. For example, the resin molding apparatus of the present invention including the piston unit 200 of FIG. 2 may further include a piston, a tank, and a molding die as described above. FIG. 5 is a cross-sectional view showing an example of the configuration of the above-mentioned resin molding device. This figure shows only the main part of the resin molding device. As shown in the figure, the main components of the resin molding device 1000 are a piston unit 200 , a base member 300 , a piston 400 , a molding die composed of a lower die 500 and an upper die 600 , and a lower die chase holder 510 . A space for arranging the piston unit 200 is formed in the central portion of the base member 300, and the piston unit 200 is arranged in the space. The piston 400 is installed at the upper end of the piston installation part 201 in the piston unit 200 . The lower mold frame 510 is placed on the base member 300 . The lower mold 500 is placed on the lower mold frame 510 . Furthermore, an upper mold 600 is disposed above the lower mold 500 . A cavity 601 is formed on the mold surface (the surface opposite to the lower mold 500 ) of the upper mold 600 , and resin molding can be performed in the cavity 601 . The lower mold 500 is formed with a through hole 501, and the through hole 501 serves as a bucket for storing the resin material. The piston 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 frame 510, the lower mold 500 and the upper mold 600 can be opened and closed. As shown in the figure, resin molding can be performed by closing the molds so that the upper surface of the lower mold 500 and the mold surface of the upper mold 600 come into contact. More specifically, by raising the piston 400 in this state, the resin material 10 in the through hole 501 (pot) can be injected into the cavity 601 to perform resin molding. In addition, the resin material 10 in the drawing is a liquid resin, but it may be a resin that is liquid at room temperature, or a resin that becomes liquid after being heated and melted, for example. The method of manufacturing a resin molded product using this resin molding device and the method of collecting resin powder are not particularly limited, and can be performed as described, for example, using the above-mentioned (a) of FIG. 3 .

In addition, FIG. 7 has shown an example of the structure of the piston unit which does not have the member for resin powder collection. (a) of Fig. 7 is a perspective view. (b) of Fig. 7 is a perspective view viewed from a direction different from that of (a) of Fig. 7 . (c) of Fig. 7 is a left side view. (d) of Fig. 7 is a front view. (e) of Fig. 7 is a sectional view viewed from the V-V' direction of (d) of Fig. 7 . (f) of Fig. 7 is a cross-sectional view viewed from the direction IV-IV' of (c) of Fig. 7 . Piston unit 200a shown in FIG. 7 is the same as piston unit 200 in FIG. The cover member 220a is the same as the cover member 220 of FIG. 2 except that there is no screw hole for attaching the resin powder collecting member 100 .

When a resin molded product is manufactured using a piston unit without a resin powder collection member as shown in FIG. 7 , resin powder dropped from the gap between the tank and the piston accumulates on the upper surface of the cover member 220 a. The resin powder accumulated on the upper surface of the cover part 220a needs to be manually cleaned and removed periodically. If the cleaning is insufficient and the accumulated resin powder falls from the upper surface of the cover member 220a and invades the equal pressure device part in the piston body or the driving part of the piston mounting part 201 (in the hole 211 shown in the figure), it may cause malfunction of the piston. . Therefore, as illustrated in FIGS. 1-3, if the resin powder collection member 100 of the present invention is used, the resin powder 10a can be reduced from falling from the upper surface of the cover member 220a, so the equal pressure of the resin powder 10a entering the piston main body can be reduced. The device part or the driving part of the piston mounting part 201 can also reduce the malfunction of the piston. If the member for collecting resin powder of the present invention is used, compared with the case without the member for collecting resin powder shown in FIG. 7 , it is not necessary to frequently clean the resin powder. Therefore, according to the present invention, the resin powder can be efficiently collected, and as a result, a resin molded article can also be efficiently produced. In addition, according to the present invention, as described above, the accumulated resin powder can be automatically removed by suction or the like. Thereby, resin powder can be collected more efficiently.

In addition, the member for resin powder collection of this invention has a ceiling part as mentioned above. Accordingly, the upper end of the resin powder collecting member of the present invention can always be closed except for the through-hole for inserting the piston mounting portion and the through-hole for dropping the resin powder. Thereby, for example, when suction or air pressure feeding is performed, it is possible to reduce the flying of the resin powder contained in the resin powder collecting member from above to the outside of the collecting member. Thereby, resin powder can be collected more efficiently than patent document 1, for example.

In addition, the member for collecting resin powder of the present invention, for example, as described above, when projected that the member for collecting resin powder is mounted on the mounting surface of the piston unit, from the end on the side of the through hole for inserting the piston mounting part to the through hole for dropping the resin powder The distance may be greater than the distance from the side end of the side wall portion to the through hole for dropping the resin powder. An example thereof is shown in a sectional view of FIG. 4 . FIG. 4 is a cross-sectional view showing only parts of the resin powder collection member 100 and the piston mounting part 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 of the piston unit main body 210, the resin powder collecting member 100 is projected from the end of the piston mounting portion insertion through hole 101 side to the resin powder dropping through hole. The distance l2 of the hole 102 is greater than the distance l1 from the end of the side wall portion 120 to the through hole 102 for dropping resin powder. Thereby, as shown in the drawing, the inclination angle φ of the inclined surface from the end portion on the side of the piston mounting portion insertion through hole 101 to the resin powder dropping through hole 102 becomes gentle. Therefore, it is possible to reduce the space for the resin powder falling vertically from the sliding gap where the piston slides (moves up and down) to the resin powder collection member 100 from the gap between the piston mounting part 201 and the piston mounting part insertion through hole 101. Within 121. Accordingly, it is possible to reduce the accumulation of resin powder in the area X inside the space 121 around the piston mounting portion 201 in the space 121 . Therefore, it is possible to reduce the entry of resin powder into the piston unit body 210 and the hole 211 of the cover member 220 (the hole in which the piston mounting part 201 can move up and down inside, see FIG. 2 ). Thereby, it is possible to further reduce the part of the equal pressure device where the resin powder enters into the piston main body, the driving part of the piston mounting part 201, etc., and further reduce the malfunction of the piston. In addition, by using either or both of the O-rings 701 and 702 in (b) of FIG. In addition, in the resin powder collecting member 100 of FIG. The relationship of the inclination angle φ between the end portion on the side of the through hole 101 for part insertion and the inclined surface (inner inclined surface) of the through hole 102 for resin powder dropping is θ>φ. In addition, the relationship between the height t1 from the bottom surface of the ceiling part to the vertex of the outer inclined surface and the height t2 from the bottom of the ceiling part to the vertex of the inner inclined surface is t1>t2. In addition, in this figure, only the size of the left half of the resin powder collecting member 100 is shown, but because of bilateral symmetry, the size of the right half is the same as that of the left half.

In addition, the configuration, shape, manufacturing method, etc. of the resin powder collecting member of the present invention are not limited to the examples shown in FIGS. 1-4 . For example, the resin powder collection member 100 shown in FIGS. 1-4 can be manufactured by cutting a metal bulk material or the like. However, the member for resin powder collection of this invention is not limited to this, For example, it can manufacture by plastic processing, such as sheet metal processing which bends a flat metal material. FIG. 6 is a cross-sectional view showing an example of the structure of the resin powder collection member of the present invention described above, and also schematically shows a structure for collecting resin powder by using the piston unit of this structure. FIG. 6 is a diagram showing a state where the resin powder collecting member 100a of the present invention is attached to the piston unit 200 of FIG. 2 . FIG. 6 is the same as FIG. 3( a ) except that the member 100 for collecting resin powder is replaced with the member 100 a for collecting resin powder. In addition, the method of manufacturing a resin molded product and the method of collecting resin powder using the resin molding device including the piston unit in FIG. 6 are not particularly limited, and can be performed, for example, in the same manner as in FIG. 3( a ). The resin powder collecting member 100a is the same as the resin powder collecting member 100 in FIGS. The ceiling part 110a is the same as the ceiling part 110 except the shape being a flat plate. The shape of the upper surface of the ceiling part 110a is the same as that of the ceiling part 110 of the member 100 for resin powder collection. That is, like the ceiling portion 110, the upper surface of the ceiling portion 110a is inclined in a convex shape (mountain shape) toward the through hole 101 for inserting the piston mounting portion, and is inclined in a concave shape (valley shape) toward the through hole 102 for dropping resin powder. shape). Thereby, the resin powder 10a falls easily to the through-hole 102 for resin powder drop. In addition, in the ceiling part 110a of FIG. 6, as shown in the figure, in the through-hole 102 for dropping resin powder, the end of the ceiling part 110a on the outer side (side wall part 120a side) enters the inner side (through-hole for inserting the piston mounting part). 101 side) below the end. With the above configuration, the resin powder 10a entering the space 121 is less likely to fall out from the resin powder drop through-hole 102 . In addition, this resin powder collection member 100a can be manufactured by plastic processing, such as sheet metal processing which bends a flat metal material, as mentioned above, for example. More specifically, for example, a metal plate-shaped material may be drilled to form a through-hole 101 for inserting the piston mounting portion, a through-hole 102 for dropping resin powder, etc., and the metal plate-shaped material may be bent to form a ceiling portion. 110a and side wall portion 120a. In addition, the manufacturing method of the resin powder collecting member of the present invention is not limited to plastic processing such as cutting processing of metal bulk materials and sheet metal processing of bending metal flat materials, and may be manufactured by any other manufacturing methods. .

The present invention has been described above with reference to the embodiments, but the present invention is not limited to the above-described embodiments. For example, in the member for collecting resin powder of the present invention, the number of through-holes for dropping resin powder is arbitrary as described above and is not particularly limited. For example, in FIGS. 1-4 and 6, in order to make the resin powder 10a fall easily from the through hole 102 for dropping the resin powder, a slit (long hole) is respectively set on both sides of the through hole 101 for inserting the piston mounting part. )-shaped through-hole 102 for dropping resin powder. However, the present invention is not limited thereto, and for example, a plurality of through holes for dropping resin powder may be provided on both sides of the through hole for inserting the piston attachment portion. In addition, although the member for resin powder collection of this invention includes a ceiling part and a side wall part as mentioned above, it may not have a bottom part. For example, as shown in Fig. 2, Fig. 3, and Fig. 6, by fixing the resin powder collection member 100 or 100a on the upper surface of the cover member 220, the upper surface of the cover member 220 serves as the upper surface of the resin powder collection member 100 or 100a. The underside comes into play. However, the present invention is not limited thereto, and for example, the member for collecting resin powder may have a bottom portion.

Furthermore, the present invention is not limited to the above-mentioned embodiments, and can be arbitrarily and appropriately combined, changed, or selectively used as needed within the scope not departing from the gist of the present invention.

The present application claims priority based on Japanese Patent Application No. 2020-194737 filed on November 24, 2020, and the entire disclosure thereof is incorporated herein.

10: Resin material 10a: resin powder 100, 100a: components for collecting resin powder 101: Through hole for inserting piston mounting part 102: Through hole for dropping resin powder 103: Resin powder collection part installation part 110, 110a: ceiling part 111: Convex part of ceiling part 112: Recessed part of ceiling part 120, 120a: side wall portion 121: The space enclosed by the ceiling part and the side wall part 130: Parts for suction 131: suction hole 140: The component 100 for collecting resin powder is mounted on the mounting surface of the piston unit main body 210 200, 200a: piston unit 201: Piston installation part 202: Rod 203: Knob 210: Piston unit main body 211: hole 212: spring 220, 220a: cover parts 300: base part 400:piston 500: lower mold 501: through hole 510: Lower mold base 600: upper mold 601: mold cavity 701, 702: O-ring 800: suction mechanism 801: suction path 1000: resin molding device X: the area inside the space 121 located around the piston mounting part 201 within the space 121

FIG. 1 is a diagram showing an example of the member for collecting resin powder of the present invention. (a) of Figure 1 is a plan view. (b) of Fig. 1 is a bottom view. (c) of Fig. 1 is a side view. (d) of Fig. 1 is a sectional view viewed from the I-I' direction of (a) of Fig. 1 . (e) of Fig. 1 is a perspective view seen from obliquely above. (f) of Fig. 1 is a perspective view viewed obliquely from below.

Fig. 2 is a diagram showing an example of a piston unit of the present invention. (a) of Fig. 2 is a perspective view. (b) of Fig. 2 is a perspective view viewed from a direction different from that of (a) of Fig. 2 . (c) of Fig. 2 is a left side view. (d) of Fig. 2 is a front view. (e) of Fig. 2 is a right side view. (f) of Fig. 2 is a sectional view viewed from the III-III' direction of (d) of Fig. 2 . (g) of Fig. 2 is a cross-sectional view viewed from the direction II-II' of (c) of Fig. 2 .

(a) and (b) of FIG. 3 are cross-sectional views schematically showing a resin powder collecting structure using the resin powder collecting member of FIG. 1 and the piston unit of FIG. 2 .

Fig. 4 is a cross-sectional view showing an example of the structure of the resin powder collecting member of the present invention.

Fig. 5 is a cross-sectional view showing a part of an example of the resin molding apparatus of the present invention.

6 is a cross-sectional view schematically showing another example of the structure of the member for collecting resin powder of the present invention and a structure for collecting resin powder by using a piston unit having the structure.

FIG. 7 is a diagram showing an example of a piston unit that does not have a member for collecting resin powder. (a) of Fig. 7 is a perspective view. (b) of Fig. 7 is a perspective view viewed from a direction different from that of (a) of Fig. 7 . (c) of Fig. 7 is a left side view. (d) of Fig. 7 is a front view. (e) of Fig. 7 is a sectional view viewed from the V-V' direction of (d) of Fig. 7 . (f) of Fig. 7 is a cross-sectional view viewed from the direction IV-IV' of (c) of Fig. 7 .

100: Parts for collecting resin powder

101: Through hole for inserting piston mounting part

102: Through hole for dropping resin powder

103: Resin powder collection part installation part

110: ceiling part

111: Convex part of ceiling part

112: Recessed part of ceiling part

120: side wall part

121: The space enclosed by the ceiling part and the side wall part

Claims (10)

A resin powder collection member for collecting resin powder dropped from a gap between a tank and a piston of a molding die for transfer molding, in, The above-mentioned resin powder collection part includes a ceiling part and a side wall part, and can be arranged on the upper part of the piston unit on which the above-mentioned piston is installed, The aforementioned resin powder can be collected in the space surrounded by the aforementioned ceiling portion and the aforementioned side wall portion, A through-hole for inserting the piston mounting part for inserting the piston mounting part of the piston unit and a through-hole for dropping the resin powder into the space are formed in the ceiling part, The upper surface of the ceiling portion is sloped in a concave shape from the side opposite to the through hole for inserting the piston attachment portion and the through hole for inserting the piston attachment portion toward the through hole for dropping the resin powder. The member for collecting resin powder according to claim 1, wherein the shape of the through-hole for dropping the resin powder is a slit shape. The component for collecting resin powder according to claim 1 or 2, wherein when the component for collecting resin powder is projected onto the mounting surface mounted on the piston unit, it extends from the end on the side of the through hole for insertion of the piston mounting part to the resin The distance of the through-hole for dropping the powder is larger than the distance from the side end of the side wall portion to the through-hole for dropping the resin powder. A piston unit for transfer molding, which has the member for collecting resin powder according to any one of claims 1 to 3. The piston unit according to claim 4, which further has a piston mounting portion and a hole through which the piston mounting portion can move up and down, Around the aforementioned hole, a sealing material for preventing resin powder from falling is provided. A resin molding device comprising the piston unit according to claim 4 or 5; and a molding die for resin molding. The resin molding apparatus according to claim 6, further comprising a suction mechanism for sucking the space enclosed by the ceiling portion and the side wall portion. A method of 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. The method of manufacturing a resin molded product according to claim 8, further comprising a resin powder disposal step of discarding the resin powder collected in the space surrounded by the ceiling portion and the side wall portion to the outside of the resin molding device. The method of manufacturing a resin molded product according to claim 9, wherein the resin molding device is the resin molding device according to claim 7, The resin powder discarding step is performed after stopping the suction by the suction mechanism.

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