WO2017149936A1 - 樹脂成型品、成形装置、成形方法及び金型 - Google Patents

樹脂成型品、成形装置、成形方法及び金型 Download PDF

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Publication number
WO2017149936A1
WO2017149936A1 PCT/JP2017/000606 JP2017000606W WO2017149936A1 WO 2017149936 A1 WO2017149936 A1 WO 2017149936A1 JP 2017000606 W JP2017000606 W JP 2017000606W WO 2017149936 A1 WO2017149936 A1 WO 2017149936A1
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WO
WIPO (PCT)
Prior art keywords
runner
resin
molding
partition member
mold
Prior art date
Application number
PCT/JP2017/000606
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English (en)
French (fr)
Japanese (ja)
Inventor
健二 志田
武彦 白鳥
絵理果 永井
敏亨 大須賀
由紀 佐藤
高尾　典弘
征秀 井出
貴康 浜滝
春久 近藤
恭啓 石川
茂典 佐々木
正親 長嶋
亮彦 安永
Original Assignee
株式会社バンダイ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社バンダイ filed Critical 株式会社バンダイ
Priority to CN202010985160.1A priority Critical patent/CN112223635B/zh
Priority to CN201780009603.XA priority patent/CN108698278B/zh
Publication of WO2017149936A1 publication Critical patent/WO2017149936A1/ja

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/16—Making multilayered or multicoloured articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/2602—Mould construction elements

Definitions

  • the present invention relates to a resin molded product, a molding apparatus, a molding method, and a mold.
  • Patent Document 1 describes a molding apparatus for molding such a multicolor molded product.
  • a partition member is provided in the runner groove of the mold, and the partition member prevents the flow of the primary molding resin flowing from one side of the runner groove and the primary molding resin is cured. Thereafter, a secondary molding resin different from the primary molding resin is poured from the other of the runner grooves.
  • the partition member is pushed out of the runner groove by the flow pressure of the secondary molding resin, so that the secondary molding resin flows into the position where the partition member is present and is welded to the primary molding resin.
  • a multicolor molded product is formed which is composed of the primary molding resin and the secondary molding resin having a different color from the primary molding resin.
  • the present invention provides a resin molded product in which the time required for molding is shortened.
  • a resin molded product that is molded from a plurality of resins and includes a joint portion in which a first resin and a second resin join a runner, wherein the joint portion includes the first resin.
  • molding was shortened can be provided.
  • FIG. 5B is a cross-sectional view of the runner of the resin molded product of FIG.
  • (A) is sectional drawing of the metal mold
  • (B) is after injection completion of 2nd resin.
  • (A) is sectional drawing of the metal mold
  • (B) is after injection completion of 2nd resin.
  • (A) of the runner of the resin molded product which concerns on 2nd embodiment of this invention is a perspective view
  • (B) is sectional drawing.
  • A) of the runner of the resin molded product of FIG. 9 is a perspective view
  • (B) is sectional drawing.
  • the same reference numerals indicate the same elements.
  • the vertical and horizontal directions with respect to the paper surface are used as the vertical and horizontal directions of the apparatus according to the present embodiment and used in the description in the text.
  • the present invention exemplifies resin materials of different colors as molding materials in the embodiments described below, but is not limited to this.
  • different materials such as thermoplastic resins such as polystyrene, polyethylene, and ABS, and thermosetting resins). , Metals, etc.
  • molding materials such as resins with different transparency.
  • FIG. 1 is a cross-sectional view of the entire molding apparatus 1 in which a movable mold body 2 is joined to a fixed mold body 3. *
  • the movable mold body 2 includes a male mounting plate 6 for mounting a male mold (moving side mold) 5, a fixing base 7 for fixing the male mounting plate 6, and a moving side mounting plate 9 mounted on the injection device. It consists of spacers 10 provided on both sides between the fixed base 7 and the moving side mounting plate 9. 11 and 12 connect injection nozzles for injecting molding resin materials of different colors into the mold 18 formed between the male mold 5 and the female mold 51 described later via the runner grooves 15 and 16. It is a recess. *
  • An empty chamber 19 is formed in the fixed base 7, and an extrusion plate 20 is movably provided in the empty chamber 19.
  • a plurality of knockout pins 21... Are planted on the extrusion plate 20.
  • Each knockout pin 21... Penetrates through the male mounting plate 6, the male mold 5, and the like, and the tip of the knockout pin 21 protrudes and descends into the mold 18 and the runner grooves 15 and 16.
  • the multicolor molded product 24 to be molded and the multicolor runner R molded by the runner grooves 15 and 16 are configured to be extruded.
  • the extrusion plate 20 is fixed to a pressing shaft 25 inserted through holes 22 and 23 formed in the approximate center of the fixed base 7 and the approximate center of the moving side mounting plate 9. *
  • the fixing base 7 has an attachment hole 29 opened on the fixed mold body 3 side, and a rear portion of the partition member 30 is slidably provided in the attachment hole 29.
  • coil springs 31a and 31b for urging the rear ends of the partition members 30a and 30b toward the fixed mold main body 3 are provided in the mounting hole 29, coil springs 31a and 31b for urging the rear ends of the partition members 30a and 30b toward the fixed mold main body 3 are provided.
  • the flange 32 may be formed in the rear part of the partition member 30a, and this flange 32 may be engaged with the step part 33 formed in the attachment hole 29, and the movement range of the partition member 30a may be controlled.
  • the partition members 30a and 30b are in pressure contact with a later-described female mold (fixed-side mold) 51 so that the ends of the partition members 30a and 30b partition the runner groove 16 and the mold 18 into at least two. *
  • the stationary mold body 3 includes a stationary side mounting plate 50 attached to an injection device (not shown), a female die mounting plate 52 to which a female die 51 is attached, and spacers 53 provided between both sides between these. It has become.
  • Reference numeral 55 denotes an injection nozzle connecting recess formed in the fixed side mounting plate 50. The tip of the injection nozzle attached to the connection recess 55 is connected to a female die mounting plate 52 and a sprue hole 56 formed in the female die 51. The sprue hole 56 is formed so as to communicate with the runner grooves 15 and 16. *
  • Partition Member 30a The partition member 30a will be described in detail with reference to FIGS.
  • the partition member 30a is provided in the movable mold body 2 (or the fixed mold body 3) so as to be able to enter and exit the runner groove 16 so as to partition the runner groove 16.
  • the partition member 30a is urged in a direction to exit into the runner groove 16 by the elastic member 31a.
  • the partition member 30 a that partitions the runner groove 16 is not particularly limited in cross-sectional shape, but is formed in a round shaft shape in the present embodiment.
  • the mold for housing the partition member 30a can be easily processed, or the protruding pin used conventionally can be processed to produce the partition member 30a.
  • the partition member 30a is not limited to a round shaft shape, and may be formed in a prismatic shape.
  • a small-diameter portion 35 is formed at the tip of the partition member 30a, and the tip of the small-diameter portion 35 is urged by the coil spring 31a, protrudes into the runner groove 16, and is pressed by the female die 51.
  • One surface (surface on the back side in FIG. 2, regulating surface) 36 of the small diameter portion 35 is substantially perpendicular to the flow direction of the molding resin material flowing in the runner groove 16 described later.
  • a stepped recess 40 that is open to the upper end surface 39 of the partition member 30a is formed on the other surface (front surface in FIG. 2) 37.
  • the shape of the stepped recess 40 is not particularly limited.
  • the stepped recess 40 shown in FIG. 2 includes a recess 40a that forms a hemispherical depression formed in the center of the upper end surface having a circular cross section, and a cutout from the hemispherical recess toward the other surface 37 side. And a notch 40b. *
  • FIG. 3A is a perspective view of the male mold 5 in a state where the partition member 30 a is accommodated in the runner groove 16.
  • a pair of throttle pins 16a are arranged so as to sandwich the partition member 30a.
  • the squeezing pin 16a suppresses the momentum of the flowing resin and prevents the resin from flowing over the partition member 30a to the opposite side.
  • the runner groove 16 is adjacent to the partition member 30a, protrudes into the runner groove 16 on the one surface (regulation surface) 36 side of the partition member 30a, and covers a part of the partition member 30a on the runner R described later.
  • a protrusion 16b for forming a concave portion 17a having 17a1 is disposed.
  • FIG. 3B shows a state in which the partition member 30a accommodated in the runner groove 16 of the male mold 5 is in the retracted position.
  • FIG. 3C shows an enlarged perspective view of the partition member 30a.
  • 3A, 3B, and 3C show a state where the runner groove 16 is not filled with resin. *
  • FIGS. 4 (A) and 5 (A) are perspective views of a runner R constituting a part of the resin molded product according to the first embodiment of the present invention.
  • FIG. 4B is a cross-sectional view taken along the line IV-IV in FIG.
  • FIG. 5B is a VV cross-sectional view in FIG.
  • the runner R includes a first runner part A1 formed of the first resin A, a second runner part B1 formed of the second resin B, the first resin A and the first resin A. 2 joint B where 2 resin B merges is provided.
  • the runner R forms a part of a resin molded product molded from a plurality of resins.
  • 1st runner part A1 and 2nd runner part B1 are arrange
  • the joint portion 17 includes a first joint portion 17a molded from the first resin A and a second joint portion 17b molded from the second resin B. Since the second joint portion 17b is formed in the runner groove 16 by retracting a partition member 30a, which will be described later, the bottom portion to which the shape of the stepped recess 40 of the partition member 30a is transferred and the same diameter as the small diameter portion 35 of the partition member 30a. A cylindrical portion. *
  • the 1st joint part 17a is formed in the concave shape which has wall part 17a1 and bottom (deep part) 17a2 which contact a part of side surface of the cylindrical part of the 2nd joint part 17b. That is, the concave shape is composed of a bottom portion 17a2 and a wall portion 17a1 provided upright around the bottom portion 17a2.
  • the concave shape is not limited to the above.
  • a hemispherical depression is adopted as in the concave portion 40a of the stepped concave portion 40.
  • the bottom portion 17a2 has a shape obtained by cutting an arc that is a cross-sectional shape of the second joint portion 17b from one side of the rectangle. And it arrange
  • the inner peripheral surface of the wall portion 17a1 is formed along a part of the second joint portion 17b.
  • the wall portion 17a1 of the first joint portion 17a is partly linear wall portion 17a1 that is in contact with one side surface of the square column of the second joint portion 17b. It can also be. That is, the wall portion 17a1 is not limited to a curved shape, for example, and may be a linear shape.
  • the thickness of the first joint part 17a is t1.
  • the thickness t1 is set smaller than the diameter R1.
  • R1 is about 3.0 mm
  • the thickness t1 may be set to about 1.5 mm. That is, the first joint portion 17a is formed thinner than the first runner portion A1 or the second runner portion B1.
  • At least a part of the inner peripheral surface 17a1a of the wall portion 17a1 in the left-right direction in FIG. 5B is inclined outwardly toward the concave shape toward the top of the wall portion 17a1 from the concave bottom portion 17a2. It is an inclined surface inclined at. Further, at least a part of the outer peripheral surface 17a1b of the wall portion 17a1 is an inclined surface that is inclined inwardly at an inclination angle ⁇ 2 toward the top of the wall portion 17a1. As the inclination angles ⁇ 1 and ⁇ 2, about 5 degrees can be exemplified. *
  • the wall 17a1 is configured such that the horizontal cross-sectional area gradually decreases from the bottom 17a2 toward the top of the wall 17a1. That is, when the inner and outer peripheral surfaces of the wall portion 17a1 are inclined surfaces, the force acting on the first joint portion 17a when the runner R is removed from the mold can be reduced. It is possible to prevent an excessive force from acting on the fastening portion with the two joint portions 17b. Therefore, when the runner R is removed from the mold, it is possible to prevent the first joint portion 17a and the second joint portion 17b from being disconnected and separated.
  • the first joint portion 17a and the first joint portion 17a are formed when the molding is completed. It can be prevented that the coupling of the two joint portions 17b is already weak. Therefore, even when the resin molded product according to the present embodiment is applied to a plastic model part in a plastic model kit and a runner supporting the plastic model kit, the plastic model kit is carried in a product packaging box. It is possible to suppress the occurrence of a situation in which the connection between the first joint portion 17a and the second joint portion 17b is released due to vibration or impact. *
  • the wall part 17a1 and bottom part 17a2 which comprise the 1st joint part 17a are each formed with the thin member, when extracting the said runner R from a metal mold
  • the thickness t1 of the first joint portion 17a is about 1.5 mm
  • the thickness of the bottom portion 17a2 can be about 0.5 mm.
  • the 1st joint part 17a is shape
  • the axial length of the first joint portion 17a is d1
  • the same axial length as the first joint portion 17a in the first runner portion A1 is d2.
  • . d1 and d2 are the same length.
  • the volume at the length d1 of the first joint portion 17a is set smaller than the volume at the length d2 of the first runner portion A1.
  • the portion corresponding to the first joint portion is formed with a thickness of about 2.5 mm, for example, with a solid (solid). *
  • the first joint portion 17a is set to be thinner than the first runner portion A1, and has a concave shape composed of the thin wall portion 17a1 and the bottom portion 17a2, and therefore has the same length.
  • the first runner part A1 has a smaller volume. In this way, the first runner portion A1 adjacent to the first joint portion 17a is reduced in volume and widened in contact area with the mold, so that the first joint portion 17a can be formed at the time of molding described later. Curing can be performed quickly.
  • FIGS. 6A and 6B are cross-sectional views of the mold taken along the line VI-VI in FIG. 3A, for example.
  • an injection device (not shown) is connected to the mold, and, for example, a runner groove is formed from the recess 11 connecting the injection nozzle to the molding space 18 and the runner groove 16.
  • the first resin A flowing from one side is injected (first injection step).
  • the injection device for example, injects the second resin B flowing from the other of the runner grooves 16 into the mold from the recess 12 connecting the injection nozzle (second injection step).
  • the first resin A flows from the left side in the drawing to the right side in the drawing, and is on one side (regulating surface) 36 side of the partition member 30a.
  • the first resin A is filled in the space in the runner groove 16 where the protrusion 16b is disposed.
  • the regulation surface side of the partition member 30a regulates the flow of the first resin A flowing from one side (left side in the drawing) of the runner groove 16 (regulation step). That is, in the partition member 30a, one surface 36 is substantially perpendicular to the inflow direction of the molded resin material, and the flow of the molded resin material flowing toward the one surface 36 can be prevented.
  • the first resin A is blocked by one surface 36 of the partition member 30a, and the flow stops.
  • the first resin A has a concave first joint portion (concave shape) including a wall portion 17a1 and a bottom portion 17a2 surrounding a part of the partition member 30a in the runner groove 16 on the one surface (regulating surface) 36 side.
  • Part) 17a is molded (first molding step).
  • the protrusion 16b in the runner groove 16 includes a first side surface 16b1 facing the surface 16d of the runner groove 16 and one surface of the partition member 30a.
  • a second side surface 16b2 is provided along a part of the partition member 30a at a predetermined distance. As shown in FIG. 3C, the second side surface 16b2 is separated from one surface of the partition member 30a by a predetermined distance d.
  • the wall portion 17a1 of the first joint portion 17a has an inclined surface, at least the first side surface 16b1 of the protrusion 16b and the surface 16d of the runner groove 16 are formed on the inclined surface.
  • the concave first joint portion 17a is formed by the thin wall portion 17a1 and the bottom portion 17a2, and is hardened quickly because its volume is set small. That is, the first joint portion 17a is provided with the thin bottom portion 17a2 and the thin wall portion 17a1 surrounding the periphery by the projection portion 16b of the runner groove 16, so that the contact area with the mold becomes wide and hardens quickly. . *
  • the solid runner which does not have a concave shape will be formed in the location applicable to a 1st joint part.
  • a predetermined time is required until the inside of the solid runner cools, and therefore, a predetermined time is spent until the solid runner is cured as compared with the concave first joint portion 17a as in the present embodiment. . Therefore, the concave first joint portion 17a formed by the first resin A is rapidly cured as compared with the conventional one (curing step).
  • the second resin B having a different color is injected into the runner groove 16 by the injection nozzle connected to the connection recess 55.
  • the second resin B flows in from the other side of the runner groove 16 (from the right side to the left side in the figure)
  • the second resin B is temporarily blocked by the other surface 37 of the small diameter portion 35 of the partition member 30a. It flows into the stepped recess 40. Due to the flow pressure of the second resin B, the hemispherical concave portion 41a of the stepped concave portion 40 is pressed in the direction of arrow A, and the partition member 30a is pushed down against the biasing force of the elastic member 31a.
  • the state at this time is shown in FIG.
  • the partition member 30a is retracted from the runner groove 16 by the flow of the second resin B flowing from the other of the runner grooves 16 (retraction process).
  • the second resin B molds the joint portion to be joined with the concave portion formed in the first molding step (second forming step).
  • the second resin B when the second resin B reaches the partition member 30a, the curing of the first joint portion 17a is completed. Therefore, after the first injection portion injects the first resin A, the second injection portion is The second resin B can be injected without waiting for completion of the injection of the first resin A. Therefore, it is possible to provide a resin molded product in which the time required for molding is shortened.
  • the timing at which the second resin B reaches the partition member 30a is appropriately changed depending on the positions from the gate of the mold to the partition member 30a and the protrusion 16b of the present invention, but at least a portion corresponding to the first joint portion 17a. Since the curing of the resin becomes faster than before, the injection molding cycle is shortened and the degree of freedom in designing the mold is improved. The molding cycle is shortened by, for example, 3 seconds when the present invention is applied to the conventional mold with the same mold design. *
  • the runner R formed in this way has a cylindrical second joint portion 17b corresponding to the shape of the partition member 30a on the curved surface portion formed by a part of the wall portion 17a1 of the first joint portion 17a. Fitted.
  • the first joint portion 17a is formed so as to form a molding recess that surrounds the small-diameter portion of the second joint portion 17b, and the second joint portion 17b is held by the molding recess.
  • the weld between the first joint portion 17a and the second joint portion 17b by the second resin B becomes strong.
  • the knockout pins 21... Provided on the extrusion plate 20 move.
  • the multicolor runner R and the multicolor molded product attached to the male mold 5 of the mold body 2 can be extruded and taken out.
  • the partition member 30 and the protruding portion 16b are provided on the movable mold body 2 side, but may be provided on the fixed mold body 3 side.
  • the coil spring 31 is used as an elastic member for biasing the partition member 30, other elastic parts such as rubber and leaf springs may be used. *
  • FIGS. 7 and 8 a pair of partition members 100 are disposed so as to sandwich the protrusions 127 within the runner grooves 85, and the restricting surfaces 106 of the respective partition members 100 are the protrusions 127.
  • positioned facing is illustrated. The difference from the first embodiment is that a pair of partition members 100 are provided, and the first embodiment and the second embodiment are the same for other configurations. *
  • the partition member 100 is formed in a round shaft shape like the partition member 30a shown in FIG. 2, has a stepped recess 110 formed at the tip, and a flange 102 provided at the lower end.
  • the partition member 100 has a rear portion slidably provided in a shaft hole 99 formed in the front pushing plate 90.
  • the flange 102 of the partition member 100 is slidably attached to the sliding hole 96 of the front pushing plate 90 and is urged toward the runner groove 85 by the spring 101 provided in the spring receiving hole 104 of the rear pushing plate 91.
  • the upper wall 103 of the sliding hole 96 is engaged.
  • the flange 102 is pushed down until it abuts against a stepped portion 117 formed in the upper portion of the spring receiving hole 104 against the elasticity of the spring 101. Further, an engagement groove 116 is formed on one side of the slide hole 96, and an engagement shaft 115 provided on the flange 102 is slidably engaged with the engagement groove 116. Therefore, the partition member 100 does not rotate.
  • the tip of the partition member 100 is biased by the elasticity of the coil spring 101, protrudes into the runner groove 85, and presses against the female mold 122.
  • One surface 106 of the partition member 100 is substantially perpendicular to the flow direction of the molding resin material flowing in the runner groove 85.
  • a stepped recess 110 is formed on the other surface 107 so as to open up to the upper end surface 109 of the partition member 100.
  • the partition members 100 are in pairs and project into the runner grooves 85.
  • the two partition members 100 and 100 are provided such that one surfaces 106 and 106 face each other.
  • the first resin A flows in from one side (left side in the figure) of the runner groove 85 by the injection device.
  • the first resin A flows into the stepped recess 110 formed on the other surface 107 of the left partition member 100 in the drawing.
  • the bottom surface 111 of the stepped recess 110 is pressed by the flow pressure of the first resin A, and the partition member 100 on the left side in the drawing is pressed down against the urging force of the elastic member 101.
  • the first resin A flows in the runner groove 85 as it is, is blocked by one surface 106 of the next partition member 100, and the flow stops. At this time, a concave first joint portion 217a is formed.
  • the runner 84 formed as described above is shown in FIGS.
  • the runner 84 shown in FIG.10 and FIG.11 has shown the same member as the runner R shown in FIG.5 and FIG.6 by attaching
  • the runner 84 has the same shape except that the runner R and the first joint portion 217a are formed with a portion 200 having a shape corresponding to the partition member 100. *
  • the partition members 100 are arranged on both sides of the protrusion 127 of the runner groove 85, it is possible to inject simultaneously, for example, without adjusting the injection time of each injection nozzle.
  • the partition members 100 are arranged on both sides of the protrusion 127 of the runner groove 85, it is possible to inject simultaneously, for example, without adjusting the injection time of each injection nozzle.
  • the multicolor runner has a very simple mechanism in which only one projection die is provided. Or the injection time at the time of shape
  • molding a multicolor molded object can be shortened.
  • the mechanism since the mechanism is simple and can be reduced in size and weight, it can be manufactured at a low cost, and there is an effect that the burden on the injection device is small even if it is attached to the injection device.
  • it is not necessary to inject and mold the molding resin materials of each color in order, and injection molding is possible at the same time, so the molding cycle of molded products can be extremely shortened, increasing production efficiency and reducing production costs. . *
  • the present invention is applicable to a resin molded product such as a plastic model kit that is distributed in a state where the molded product and the runner are not separated.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
PCT/JP2017/000606 2016-03-04 2017-01-11 樹脂成型品、成形装置、成形方法及び金型 WO2017149936A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202010985160.1A CN112223635B (zh) 2016-03-04 2017-01-11 树脂成型品、成形装置、成形方法以及模具
CN201780009603.XA CN108698278B (zh) 2016-03-04 2017-01-11 树脂成型品、成形装置、成形方法以及模具

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JP2016-042797 2016-03-04
JP2016042797A JP6077154B1 (ja) 2016-03-04 2016-03-04 樹脂成型品、成形装置、成形方法及び金型

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JP2019033631A (ja) 2017-08-09 2019-02-28 国立大学法人静岡大学 Ｍｅｍｓ振動素子、ｍｅｍｓ振動素子の製造方法および振動発電素子

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