JP2024003473A - Method for manufacturing mold cleaning brush and method for manufacturing resin molding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a mold cleaning brush in which a bristle material having high density can be formed around a shaft member.

SOLUTION: A method for manufacturing a mold cleaning brush 30 for cleaning a mold provided in a resin molding device includes the steps of: preparing a channel brush formed by fixing a bristle material 33 to a channel member 35; spirally wrapping and fixing the channel brush 36 around a shaft member 38; and cutting a tip of the bristle material 33. By cutting the tip of the bristle material 33, a short bristle region 31R that includes the bristle material 33 having a first length and a long bristle region 32R that includes the bristle material 33 having a second length longer than the first length are formed at the channel brush 36 on the shaft member 38.

SELECTED DRAWING: Figure 9

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present specification relates to a method of manufacturing a cleaning brush for a mold and a method of manufacturing a resin molding device.

In a resin molding apparatus, a substrate to which electronic elements such as an IC (Integrated Circuit), a transistor, and a capacitor are connected is prepared as a molding object. By performing resin molding using a transfer molding method, a compression molding method, an injection molding method, or the like, electronic elements on a substrate are encapsulated with a resin.

Resin (also referred to as resin pieces or resin scum) generated during resin molding may remain in the mold of the resin molding device. As disclosed in Japanese Utility Model Application Publication No. 02-137217 (Patent Document 1), the mold is cleaned using a mold cleaning brush.

Utility Model Publication No. 02-137217

In the mold cleaning brush disclosed in Japanese Utility Model Application Publication No. 02-137217 (Patent Document 1), the shape of the tip of the bristles of the brush is determined to match the shape of the mold. Patent Document 1 discloses that according to such a brush, the bristles can not only reach the surface of the molding surface and clean the surface, but also reach the bottom of the cavity and clean the surface. It states that the bottom can be cleaned.

In the method for manufacturing a brush as described above, a plurality of bristle bundles are fixed to the outer periphery of the shaft member, thereby forming a plurality of bristle flocks on the outer periphery of the shaft member. A space for fixing the bristle bundle to the shaft member is required around the area where the bristle bundle is implanted. Since it is necessary to secure a space, it is difficult to reduce the distance between adjacent bristle bundles, and it is difficult to form a bristle material with high density on the circumferential surface of the shaft member.

The present specification discloses a method for manufacturing a cleaning brush for a mold, and a method for manufacturing a resin molding device, in which a bristle material having a higher density than in the prior art can be constructed around a shaft member. The purpose is to

In an aspect of the present disclosure, a method for manufacturing a mold cleaning brush for cleaning a mold provided in a resin molding apparatus includes a step of preparing a channel brush formed by fixing bristle material to a channel member. a step of spirally winding and fixing the channel brush around a shaft member extending in the axial direction; cutting a part or all of the tips of the bristle material so that the channel brush on the shaft member has a short bristle region including the bristle material having a first length. and a long hair region including the hair material having a second length longer than the first length.

In another aspect of the present disclosure, a method for manufacturing a resin molding device is a method for manufacturing a resin molding device including a mold, wherein the method for manufacturing a cleaning brush for a mold according to an aspect of the present disclosure the short hair region of the mold cleaning brush is arranged so as to be able to contact the convex portion of the mold, and the long hair region of the mold cleaning brush comprises: It is arranged so as to contact the recessed part of the mold.

According to the method for manufacturing a cleaning brush for a mold and the method for manufacturing a resin molding apparatus having the above-described configurations, it is possible to construct a bristle material having a higher density around the shaft member than in the prior art.

A functional block diagram of an example of a resin molding device is shown. FIG. 2 is a plan view schematically showing the main structure inside the resin molding device. FIG. 3 is a sectional view of a main part taken along line III-III shown in FIG. 2; FIG. 2 is a diagram schematically showing the external structure of a mold cleaning brush provided in the resin molding apparatus. FIG. 3 is a cross-sectional view showing a state in which the long hair region of the mold cleaning brush provided in the resin molding apparatus is in contact with the bottom surface of the lower mold. FIG. 2 is a cross-sectional view showing a short bristled region and a long bristled region of a mold cleaning brush provided in the resin molding apparatus in contact with the surface of a lower mold. It is a perspective view showing the preparation process of the manufacturing method of the cleaning brush for molds. FIG. 3 is a perspective view showing a fixing step in a method for manufacturing a mold cleaning brush. FIG. 3 is a perspective view showing a cutting step in a method for manufacturing a mold cleaning brush. FIG. 7 is a plan view showing a lower mold cleaning brush cleaning the lower mold in a first modification of the embodiment. FIG. 7 is a plan view showing a mold cleaning brush for an upper mold in a first modification of the embodiment. FIG. 7 is a plan view showing the configuration of a lower mold in a second modification of the embodiment.

Embodiments of the present disclosure will be described below. In the embodiments described below, when referring to the number, amount, etc., the scope of the present disclosure is not necessarily limited to the number, amount, etc. unless otherwise specified. Each component is not necessarily essential to the present disclosure unless otherwise specified. Identical and equivalent parts will be given the same reference numerals and duplicate descriptions may not be repeated.

(Resin molding device 100)
FIG. 1 shows a functional block diagram of an example of a resin molding apparatus 100 in an embodiment. The resin molding apparatus 100 includes a control section 2, a supply module 1, a resin molding module 4, and a molded product delivery module 5. The control unit 2 is configured to be able to control the supply module 1, the resin molding module 4, and the molded product delivery module 5.

The supply module 1 is configured to be able to supply a molding object and resin material to the resin molding module 4 before molding. The resin molding module 4 is configured to be able to manufacture a resin molded product by clamping a mold and molding a molded object with resin. The molded product carrying out module 5 is configured to be able to carry out the resin molded product after removing unnecessary resin portions of the molded object after molding. The supply module 1, the resin molding module 4, and the molded product delivery module 5 are mutually removable and replaceable. Further, the number of resin molded modules 4 can also be increased or decreased.

FIG. 2 is a plan view schematically showing the main structure inside the resin molding apparatus 100. FIG. 3 is a cross-sectional view of the main part taken along the line III-III shown in FIG. As mainly shown in FIG. 2, the resin molding apparatus 100 includes a supply section 10, a mold cleaning brush 30, a molding section 40, a discharge mechanism 50, and a discharge section 60.

Referring to FIGS. 1 to 3, supply module 1 mainly includes a supply section 10. As shown in FIG. A molding object before molding is placed in the supply section 10 . The object to be molded is generally a substrate to which electronic elements such as semiconductor chips are connected. As the substrate, for example, a lead frame, a printed wiring board, a metal substrate, a resin substrate, a semiconductor substrate, and a ceramic substrate are used.

The resin molding apparatus 100 further includes a transport mechanism (not shown), and this transport mechanism is configured to be movable between the supply module 1 and the resin molding module 4. The retracted position of the transport mechanism is in the supply module 1. The substrate is transported from the supply section 10 to the molding section 40 together with the resin material by the transport mechanism. As the resin material, for example, a tablet-shaped resin formed by compacting a powdered thermosetting resin is used.

The resin molding module 4 mainly includes a molding section 40. The molding section 40 includes a lower mold 41 and an upper mold 42 (FIG. 3) as molds, and a mold clamping mechanism (not shown) that clamps the mold. In the molding section 40, a lower mold 41 and an upper mold 42 are clamped by a mold clamping mechanism, whereby a molding object is resin molded.

The molded product unloading module 5 mainly includes a discharge section 60. The molded object after molding is transported from the molding section 40 to the discharge section 60 by the discharge mechanism 50, subjected to degate processing in the discharge section 60, and finally stored in the out magazine section.

The carry-out mechanism 50 is configured to be movable between the resin molding module 4 and the molded product carry-out module 5. The carry-out mechanism 50 has a mold cleaning brush 30. Here, the unloading mechanism 50 includes a first main body part 51 and a second main body part 52. The molded object after molding is discharged by the movement of the first body part 51 in the direction of arrow A1 and the movement of the second body part 52 in the direction of arrow A2. When the second main body portion 52 moves in the direction of arrow A2, the mold is cleaned.

Here, a mold cleaning brush 30 is provided in a portion of the second main body portion 52 of the unloading mechanism 50 on the side closer to the molding portion 40 . A molding object is molded with resin using a lower mold 41 and an upper mold 42 as molds, and cleaning is performed by removing the resin from the mold using a mold cleaning brush 30.

In order to clean the molds of the resin molding apparatus 100, the unloading mechanism 50 of the resin molding apparatus 100 is provided with one or more mold cleaning brushes 30 (described in detail below). When two mold cleaning brushes are provided as shown in FIG. 3, one mold cleaning brush 30 removes the resin from the lower mold 41, and the other mold cleaning brush 30 removes the resin from the upper mold 42 (FIG. 3). are removed, and the mold of the molding section 40 is cleaned by these.

(Mold cleaning brush 30 and its manufacturing method)
FIG. 4 is a diagram schematically showing the external structure of the mold cleaning brush 30. As shown in FIG. FIG. 5 is a sectional view showing how the long hair region 32R of the mold cleaning brush 30 is in contact with the bottom surface 41b of the cavity (recess) of the lower mold 41. FIG. 6 is a cross-sectional view showing how the short-hair region 31R and long-hair region 32R of the mold cleaning brush 30 are in contact with the surface of the lower mold 41 (the surface 41a and the bottom surface 41b of the recess).

As shown in FIGS. 3 to 6, the mold cleaning brush 30 has the form of a so-called roll brush. The mold cleaning brush 30 includes a shaft member 38 that rotates around an axis 38c (FIG. 3), a channel member 35 (see also FIGS. 3 and 7) fixed to the shaft member 38, and A fixed bristle material 33 is provided. The shaft member 38 has a cylindrical shape extending along an axis 38c from one end toward the other end.

As a method of manufacturing the mold cleaning brush 30, a channel brush 36 (FIG. 7) is formed by fixing the bristle material 33 to the channel member 35 (FIG. 7). After preparing such a channel brush 36, the channel brush 36 is spirally wound around the shaft member 38 (FIGS. 3, 4, and 8) and fixed (see FIG. 8). At this time, it is preferable to fix the end portion 35T (FIG. 8) of the channel member 35 in the longitudinal direction onto the surface of the shaft member 38 by welding or the like. Thereafter, with the channel brush 36 wound around the shaft member 38, the tips of some or all of the bristles 33 are cut off with a grinder or the like (see FIG. 9).

As a result, the channel brush 36 on the shaft member 38 has a short bristled region 31R including the bristles 33 (31) having the first length L1 (FIG. 5), and a short bristled region 31R having the first length L1 (FIG. 5). A long hair region 32R including a hair material 33 (32) having a length L2 (FIG. 5) of 2 is formed.

As shown in FIGS. 3, 5, and 6, in the mold cleaning brush 30 of this embodiment, a plurality of short hair regions 31R and a plurality of long hair regions 32R are arranged around the shaft member 38. They are arranged in alternating directions. Here, two short hair regions 31R and two long hair regions 32R are alternately provided around the shaft member 38. As shown in FIG. 4, in the mold cleaning brush 30, when looking at the cross-sectional shape at a specific position, a plurality of short hair regions 31R and a plurality of long hair regions 32R are arranged alternately in the axial direction. (See also Figure 9).

The hair material 33 (31) included in the short hair region 31R extends so as to protrude radially outward from the channel member 35 along the radial direction of the shaft member 38 as it goes from the root side to the tip side. ing. The hair material 33 (32) included in the long hair region 32R also extends so as to protrude radially outward from the channel member 35 along the radial direction of the shaft member 38 as it goes from the root side to the tip side. There is.

The angular range in the circumferential direction around the shaft member 38 where the short hair region 31R is provided can be set, for example, to 60° or more and 90° or less, and the angle range around the shaft member 38 where the long hair region 32R is provided can be set, for example. The angle range in the circumferential direction can also be set to, for example, 60° or more and 90° or less.

Regarding the short hair region 31R, the angle range in the circumferential direction here refers to the root portion of the hair material 33 (31) located furthest forward in the rotational direction of the short hair region 31R, and The root portion of the bristles 33 (31) located at the rearmost side in the rotational direction is identified, and within a two-dimensional plane that is perpendicular to the axis 38c and includes these two root portions, This is the angle formed between the root portion of the shaft and the axis 38c.

Regarding the long hair region 32R, the angle range in the circumferential direction here refers to the root portion of the hair material 33 (32) located furthest forward in the rotational direction of the long hair region 32R, and the rotational range of the long hair region 32R. The root portion of the hair material 33 (32) located at the rearmost side in the direction is specified, and in a two-dimensional plane that is perpendicular to the axis 38c and includes these two root portions, these two root portions are This is the angle formed by the axis 38c and the axis 38c.

For example, three short hair regions 31R provided in an angular range of 60° and three long hair regions 32R provided in an angular range of 60° can be alternately arranged around the shaft member 38. Two short hair regions 31R and two long hair regions 32R may be provided each with an angular range of 90°, or they may be provided with different angular ranges such as 50° and 70° and arranged alternately.

As shown in FIG. 5, the bristle material 33 (31) constituting the short bristle region 31R has a length L1 from the channel member 35 and extends along the radial direction of the shaft member 38. The hair material 33 (32) constituting the long hair region 32R has a length L2 from the channel member 35 and extends along the radial direction of the shaft member 38.

The distance from the axis 38c of the shaft member 38 to the tip of the bristles 33 (32) is, for example, 20 mm to 30 mm. In this embodiment, the length L2 of the bristle material 33 (32) forming the long hair region 32R is longer than the length L1 of the bristle material 33 (31) forming the short hair region 31R.

The difference between the length L2 and the length L1 is, for example, the maximum depth of the cavity formed in the lower mold 41, that is, the surface 41a of the lower mold 41 (the depth of the convex part in the lower mold 41 where no cavity is formed). The depth dimension L3 from the surface 41a) to the bottom surface 41b of the cavity recess can have the same value. The difference between length L2 and length L1 may be greater than depth dimension L3. In other words, the relationship (L3+L1)≦L2 may hold true. Although it depends on the specifications, the difference between the length L2 and the length L1 is, for example, 1.0 mm or more, 2.0 mm or less, or 3.0 mm or less. The depth dimension L3 may be 1.0 mm or less, or 3.0 mm or less. Lengths L1 and L2 are optimized according to depth dimension L3.

As shown in FIGS. 4 to 6, when cleaning the lower mold 41 using the mold cleaning brush 30, the tip of the bristle material 33 (32) constituting the long hair region 32R is removed from the lower mold. Cleaning brush 30 for molding mold is placed in such a way that it contacts bottom surface 41b of concave portion 41 and the tip of bristle material 33 (31) constituting short bristle region 31R contacts surface 41a of convex portion of lower mold 41. is moved in a direction approaching the lower die 41.

As an example, the distance L5 (FIG. 5) from the channel member 35 to the bottom surface 41b of the recess of the lower mold 41 can be set to the same value as the length L2 of the bristle material 33 (32) that constitutes the long bristle region 32R, The distance L4 from the outer peripheral surface of the shaft member 38 to the surface 41a can be set to the same value as the length L1 of the bristle material 33 (31) constituting the short bristle region 31R.

In the resin molding apparatus 100 equipped with the mold cleaning brush 30 as described above, when cleaning the mold using the mold cleaning brush 30, the bristle material 33 ( 32) can reach the surface 41a of the convex part of the lower mold 41, the side surface which is the inner surface of the cavity, and the bottom face 41b of the concave part, and as the shaft member 38 rotates, the bristles 33 (32) Resin and the like attached to the bottom surface 41b of the recess can be removed. The bristle material 33 (31) constituting the short bristle region 31R can reach the surface 41a of the convex portion of the lower mold 41, and as the shaft member 38 rotates, the bristle material 33 (31) Resin and the like attached to the surface 41a of the convex portion of the lower mold 41 can be removed.

(action and effect)
As mentioned at the beginning, in the conventional brush manufacturing method, a plurality of bristle bundles are fixed to the outer periphery of the shaft member, thereby forming a plurality of bristle flocks on the outer periphery of the shaft member. A space for fixing the bristle bundle to the shaft member is required around the area where the bristle bundle is implanted. Since it is necessary to secure a space, it is difficult to reduce the distance between adjacent bristle bundles, and it is difficult to form a bristle material with high density on the circumferential surface of the shaft member. Further, in the conventional method of manufacturing a brush, it is necessary to prepare a plurality of bristle bundles for forming the bristle part and to sequentially fix each of the plurality of bristle bundles to the shaft member. Such a method requires multiple operations to fix each of the plurality of hair bundles to the shaft member.

On the other hand, according to the method for manufacturing mold cleaning brush 30 of the present embodiment, channel brush 36 (FIG. 7) is formed by fixing bristle material 33 to channel member 35 (FIG. 7). . After preparing such a channel brush 36, the channel brush 36 is spirally wound around the shaft member 38 (FIGS. 3, 4, and 8) and fixed (see FIG. 8). At this time, both ends of the channel member 35 in the longitudinal direction may be fixed onto the surface of the shaft member 38 by welding or the like. Thereafter, with the channel brush 36 wound around the shaft member 38, the tips of some or all of the bristles 33 are cut off with a grinder or the like (see FIG. 9).

According to the above manufacturing method, when the channel brush 36 is spirally wound and fixed, the channel It is possible to wrap subsequent portions of the brush 36 onto the shaft member 38, effectively depositing the bristle material 33 onto the shaft member 38 at a higher density than if the bristle material were implanted into the shaft member. It is possible to arrange the mold cleaning brush 30, and it is therefore possible to plan for a higher cleaning effect by the mold cleaning brush 30.

(First modification of the embodiment)
FIG. 10 is a plan view showing how the mold cleaning brush 30 for the lower mold 41 is cleaning the lower mold 41 in the first modification of the embodiment. This lower mold 41 has a cavity 46 and a resin passage 45 formed as a recess 44 inside a parting surface 43 which is a convex part of the lower mold 41. 48.

The mold cleaning brush 30 for cleaning the lower mold 41 has, for example, a long bristled region 32R in a horizontally elongated shape at the center in the axial direction, corresponding to the shapes of the concave portions and convex portions in the lower mold 41. Short hair regions 31R are provided on both sides thereof. The long hair region 32R has a width such that it covers the entire cavity 46 located on the left side of FIG. 10 and also covers the entire cavity 46 located on the right side. The long hair region 32R cleans the cavity 46 and the resin passage 45 as a recess of the lower mold 41.

As the mold cleaning brush 30 for cleaning the upper mold corresponding to the lower mold 41, for example, one shown in FIG. 11 can be used. The mold cleaning brush 30 shown in FIG. 11 has a short bristled region 31R in the center corresponding to the shapes of the concave portions and convex portions in the upper mold, long bristled regions 32R on both sides thereof, and further outside the short bristled region 31R. A short hair region 31R is provided. The bottom surface of the recess of the upper mold cavity can be cleaned by the short bristled region 31R.

The configuration of the lower mold shown in FIG. 10 may be adopted as the upper mold. That is, the resin passage 45 and the cull portion 48 may be provided in the upper mold. In that case as well, the short bristles region 31R and the long bristles region 32R of the mold cleaning brush 30 are appropriately arranged in accordance with the configuration of the concave portions and convex portions of the upper mold, as in the case shown in FIG. 10.

(Second modification of the embodiment)
FIG. 12 is a plan view showing another example of the lower mold 41 that can be cleaned by the mold cleaning brush 30 in the second modification of the embodiment. In this lower mold 41, a part of the parting surface 43 as a convex portion of the lower mold 41 extends so as to protrude toward the cavity 46 side, and the extended portion constitutes a dam portion 43D. That is, the convex portion of the lower die 41 includes at least one of the parting surface 43 and the surface of the dam portion 43D. The lower mold 41 having such a shape may also be cleaned using a mold cleaning brush 30 as shown in FIG. 10, for example.

The configuration of the lower mold shown in FIG. 12 may be adopted as the upper mold. That is, the upper mold may be provided with not only the resin passage 45 and the cull portion 48 but also the dam portion 43D. In that case as well, the short bristles region 31R and long bristles region 32R of the mold cleaning brush 30 are appropriately arranged in accordance with the configuration of the concave portions and convex portions of the upper mold, as in the case shown in FIG. 10 and the like.

Although the embodiments of the present disclosure have been described above, the embodiments disclosed this time should be considered to be illustrative in all respects and not restrictive. The scope of the present disclosure is indicated by the claims, and it is intended that all changes within the meaning and range equivalent to the claims are included.

1 supply module, 2 control section, 4 resin molding module, 5 molded product delivery module, 10 supply section, 30 mold cleaning brush, 31R short hair region, 32R long hair region, 33 hair material, 35 channel member, 35T end portion , 36 channel brush, 38 shaft member, 38c axis, 40 molding part, 41 lower mold, 41a surface, 41b bottom surface, 42 upper mold, 43 parting surface, 43D dam part, 44 recess, 45 resin passage, 46 cavity, 48 cull part, 50 unloading mechanism, 51 first main body part, 52 second main body part, 60 discharge part, 100 resin molding device, L1 length (first length), L2 length (second length) , L3 dimension, L4, L5 distance.

Claims (7)

A method for manufacturing a mold cleaning brush for cleaning a mold provided in a resin molding device, the method comprising:
preparing a channel brush formed by fixing bristle material to a channel member;
spirally winding and fixing the channel brush around a shaft member extending in the axial direction;
cutting off the tips of some or all of the bristle material in a state where the channel brush is wound around the shaft member,
By cutting off some or all of the tips of the bristle material, the channel brush on the shaft member has a short bristle region including the bristle material having a first length and a short bristle region that is longer than the first length. a long hair region including the hair material having a second length that is also longer;
A method for manufacturing a cleaning brush for molds. The short hair regions and the long hair regions are arranged alternately in a circumferential direction around the shaft member,
A method for manufacturing a mold cleaning brush according to claim 1. The angular range in the circumferential direction around the shaft member in which the short hair region is provided is 60° or more and 90° or less,
The angular range in the circumferential direction around the shaft member in which the long hair region is provided is 60° or more and 90° or less,
A method for manufacturing a mold cleaning brush according to claim 1 or 2. The difference between the first length and the second length is 1.0 mm or more,
A method for manufacturing a mold cleaning brush according to any one of claims 1 to 3. A method for manufacturing a resin molding device equipped with a mold, the method comprising:
A step of manufacturing a cleaning brush for a mold by the method for manufacturing a cleaning brush for a mold according to any one of claims 1 to 4,
The short hair region of the mold cleaning brush is arranged so as to be able to contact the convex portion of the mold,
The long hair region of the mold cleaning brush is arranged to contact the recess of the mold.
Manufacturing method for resin molding equipment. The recess of the mold includes at least one of a bottom surface of a cavity of the mold and a bottom surface of a resin passage connected to the cavity.
A method for manufacturing a resin molding device according to claim 5. The convex portion of the mold includes at least one of a parting surface of the mold and a surface of a dam portion provided in a cavity of the mold.
A method for manufacturing a resin molding device according to claim 5 or 6.

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