JPH02289319A - Manufacture of two-color molded product - Google Patents
Manufacture of two-color molded productInfo
- Publication number
- JPH02289319A JPH02289319A JP11065289A JP11065289A JPH02289319A JP H02289319 A JPH02289319 A JP H02289319A JP 11065289 A JP11065289 A JP 11065289A JP 11065289 A JP11065289 A JP 11065289A JP H02289319 A JPH02289319 A JP H02289319A
- Authority
- JP
- Japan
- Prior art keywords
- insert
- hole
- decorative part
- molding
- decorative
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 239000012778 molding material Substances 0.000 claims abstract description 21
- 238000000465 moulding Methods 0.000 claims abstract description 18
- 238000005192 partition Methods 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 6
- 229920003002 synthetic resin Polymers 0.000 claims description 10
- 239000000057 synthetic resin Substances 0.000 claims description 10
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000011247 coating layer Substances 0.000 abstract description 8
- 230000002950 deficient Effects 0.000 abstract description 5
- 230000000149 penetrating effect Effects 0.000 abstract 2
- 230000002265 prevention Effects 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 10
- 238000005034 decoration Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
この発明は、インサート表面にそのインサートから突出
する合成樹脂製の装飾部が配置される、例えば自動車の
ステアリングホイールに装着されるパッド等の二色成形
品の製造方法に関する。[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a second pad, such as a pad attached to a steering wheel of an automobile, in which a synthetic resin decoration part protruding from the insert is disposed on the insert surface. This invention relates to a method for producing colored molded products.
〈従来の技術〉
従来、インサート表面にインサートから突出する合成樹
脂製の装飾部が配置されるパッドでは、第８図に示すも
のがある。<Prior Art> Conventionally, there is a pad shown in FIG. 8 in which a synthetic resin decorative part protruding from the insert is disposed on the insert surface.
このパッド１は、硬質合成樹脂製のインサート２と、イ
ンサート２を被覆する軟質合成樹脂製の被覆層６と、か
ら構成されている。被覆層６には、所定の文字等からな
る装飾部７が形成されている。This pad 1 is comprised of an insert 2 made of hard synthetic resin and a covering layer 6 made of soft synthetic resin that covers the insert 2. A decorative portion 7 consisting of predetermined characters or the like is formed on the covering layer 6.
そして、この装飾部７は、インサート２の装飾部配置部
位に貫通孔３が形成され、成形時、被覆層６の成形材料
Ｍをインサート２の裏面側から貫通孔３を経てインサー
ト２の表面側へ流し、装飾部７以外の被覆層６とともに
形成している。In this decorative part 7, a through hole 3 is formed in the decorative part arrangement part of the insert 2, and during molding, the molding material M of the coating layer 6 is passed from the back side of the insert 2 through the through hole 3 to the front side of the insert 2. It is formed together with the covering layer 6 other than the decorative part 7.
〈発明が解決しようとする！！題〉
しかし、従来のパッド１では、装飾部７がインサート２
の裏面側から貫通孔３を経てインサート２０表面ｆｕｌ
ｌを流れる成形材料Ｍから形成されており、成形材料Ｍ
が装飾部７の表面側の周縁で行き止まりとなるため、装
飾部７における表面側の端部にエア溜りが発生し、成形
時に不良品を生じさせてしまう場合があった。<Invention tries to solve! ! Problem> However, in the conventional pad 1, the decorative part 7 is not the insert 2.
from the back side of the insert 20 through the through hole 3
The molding material M flows through the molding material M.
Since this ends at the peripheral edge of the decorative portion 7 on the front side, an air pocket is generated at the end of the decorative portion 7 on the front side, which may result in defective products during molding.
この発明は、上述の課題を解決するものであり、インサ
ート表面にインサートから突出する合成樹脂製の装飾部
が配置される二色成形品を製造する場合に、装飾部の表
面側にエア溜りを発生させず、不良品の発生を抑えて製
造することができる二色成形品の製造方法を提供するこ
とを目的とする。This invention solves the above-mentioned problem, and when manufacturing a two-color molded product in which a decorative part made of synthetic resin that protrudes from the insert is arranged on the insert surface, an air pocket is created on the surface side of the decorative part. An object of the present invention is to provide a method for manufacturing a two-color molded product that can be manufactured while suppressing the occurrence of defective products.
〈課題を解決するための手段〉
この発明に係る二色成形品の製造方法は、インサート表
面に該インサートから突出する合成樹脂製の装飾部が配
置される二色成形品の製造方法であって、
前記インサートには、前記装飾部配置部位に形成される
第一貫通孔と、前記装飾部配置部位内の周縁で隔壁を隔
てて前記第一貫通孔に隣接して形成される第二貫通孔と
、が配設され、
成形時、前記装飾部成形材料を、前記インサート裏面側
から前記第一貫通孔を経て前記インサート表面側へ流し
、その後、前記インサート表面側から前記第二貫通孔を
経て前記インサート裏面側へ流すことにより、前記装飾
部を形成することを特徴とする。<Means for Solving the Problems> A method for manufacturing a two-color molded product according to the present invention is a method for manufacturing a two-color molded product in which a decorative portion made of synthetic resin that protrudes from the insert is arranged on the surface of the insert. , the insert includes a first through hole formed in the decorative part arrangement region, and a second through hole formed adjacent to the first through hole with a partition wall separated by a peripheral edge in the decorative part arrangement region. and, during molding, the decorative portion molding material flows from the back side of the insert through the first through hole to the front side of the insert, and then from the front side of the insert through the second through hole. The decorative portion is formed by flowing toward the back side of the insert.
〈発明の作用・効果〉
この発明に係る製造方法では、装飾部の成形時、その装
飾部の成形材料を、インサート裏面側から、装置！１ｌ
ｉＫＳ配置部位に形成された第一貫通孔を経てインサー
ト表面側へ流し、その後、インサート表面側から、装飾
部配置部位内の周縁で隔壁を隔てて第一貫通孔に隣接し
て形成された第二貫通孔を経て前記インサート裏面側へ
流して、装飾部を形成する。<Operations and Effects of the Invention> In the manufacturing method according to the present invention, when molding the decorative portion, the molding material for the decorative portion is applied to the device from the back side of the insert. 1l
It flows to the insert surface side through the first through hole formed in the iKS placement area, and then flows from the insert surface side to the second through hole formed adjacent to the first through hole across the partition wall at the periphery in the decoration part placement area. The decorative portion is formed by flowing through the two through holes to the back side of the insert.
すなわち、装飾部の成形材料が、インサートの裏面側と
なる装飾部の裏側で行き止まりとなることから、成形時
、成形用型における装飾部を形成する凹部にエアが巻き
込まれても、そのエアによるエア溜りは装飾部の裏側に
発生するため、不良品とならない。In other words, since the molding material for the decorative part comes to a dead end on the back side of the decorative part, which is the back side of the insert, even if air is caught in the recess that forms the decorative part in the mold during molding, the Air pockets occur on the back side of the decorative part, so they are not considered defective.
したがって、この発明に係る製造方法では、インサート
表面にインサートから突出する合成樹脂製の装飾部が配
置される二色成形品を製造する場合に、装飾部の表面側
にエア溜りを発生させず、不良品の発生を抑えて製造す
ることができる。Therefore, in the manufacturing method according to the present invention, when manufacturing a two-color molded product in which a synthetic resin decorative part protruding from the insert is arranged on the insert surface, air pockets are not generated on the surface side of the decorative part, It is possible to manufacture products while suppressing the occurrence of defective products.
〈実施例〉 以下、この発明の一実施例を図面に基づいて説明する。<Example> Hereinafter, one embodiment of the present invention will be described based on the drawings.
第２・３・７図に示す実施例の二色成形品は、自動車の
ステアリングホイール中央に装着されるバッド１１であ
り、このバッド１１は、ＡＢＳ等の硬質合成樹脂製のイ
ンサート１２と、このインサート１２を覆う軟質ｐｖｃ
等の軟質合成樹脂製の被覆層１６と、から構成されてい
る。The two-color molded product of the embodiment shown in Figs. 2, 3, and 7 is a pad 11 that is attached to the center of a steering wheel of an automobile.This pad 11 includes an insert 12 made of hard synthetic resin such as ABS, and Soft PVC covering insert 12
and a covering layer 16 made of soft synthetic resin such as.
このバッド１１の上面中央には、インサート１２表面に
インサート１２から突出し、ｒＧＴＪの文字をデザイン
した装飾部１７が形成されているこの装飾部１７は、被
覆層１６の成形時に、被覆層１６と一体的に形成される
ものである。At the center of the upper surface of this pad 11, there is formed a decorative part 17 that protrudes from the insert 12 and has the letters rGTJ designed on it.This decorative part 17 is formed integrally with the covering layer 16 when the covering layer 16 is molded. It is formed based on
インサート１２には、第４・５・６図に示すように、装
飾部１７の配貨部位に、装飾部１７の文字幅より若干狭
くしてインサート１２の表裏を貫通する第一貫通孔１３
が形成されている。なお、第５・６図においては、第一
貫通孔１３は、斜線で示した部位である。As shown in FIGS. 4, 5, and 6, the insert 12 has a first through hole 13 that is slightly narrower than the character width of the decorative part 17 and passes through the front and back of the insert 12 in the distribution area of the decorative part 17.
is formed. In addition, in FIGS. 5 and 6, the first through hole 13 is a portion indicated by diagonal lines.
また、この第一貫通孔１３の端部付近の二箇所には、そ
れぞれ、装飾部１７の配置部位内の周縁で、隔壁１５を
隔ててインサート１２の表裏を貫通する第二貫通孔１４
が形成されている。各隔壁１５・１５におけるインサー
ト１２裏面側は、成形時、後述する被覆層１６を成形す
る成形用金型３１における可動型３３の型面３３ａに当
接するように構成されている。Further, in two places near the end of the first through hole 13, there are second through holes 14 that pass through the front and back of the insert 12 with the partition wall 15 in between, at the periphery of the area where the decorative part 17 is arranged.
is formed. The back side of the insert 12 in each of the partition walls 15, 15 is configured to come into contact with a mold surface 33a of a movable mold 33 in a molding die 31 for molding a coating layer 16, which will be described later, during molding.
さらに、第一貫通孔１３の周囲には、インサート１２の
表裏を貫通する複数の小孔２３が形成されている。これ
らの小孔２３は、装飾部１７周囲の被覆層１６部位から
装飾部１７を成形する成形材料Ｍをインサート１２裏面
側へ導くとともに、装飾部１７周囲の被覆層１６の剥離
防止を図るものである。Furthermore, around the first through hole 13, a plurality of small holes 23 are formed that penetrate the front and back sides of the insert 12. These small holes 23 are intended to guide the molding material M for molding the decorative part 17 from the part of the covering layer 16 around the decorative part 17 to the back side of the insert 12, and to prevent the covering layer 16 around the decorative part 17 from peeling off. be.
そして、これらの小孔２３の配置部位には、インサート
１２の裏面側で、他の一般面から若干窪んだ環状溝２４
が形成されている。環状溝２４には、第一貫通孔１３に
成形材料Ｍを導くための導入凹溝２５が形成されている
。At the location where these small holes 23 are arranged, there is an annular groove 24 that is slightly recessed from the other general surface on the back side of the insert 12.
is formed. An introduction groove 25 for guiding the molding material M into the first through hole 13 is formed in the annular groove 24 .
なお、２６は、インサート１２裏面側の第一貫通孔１３
０周縁に設けられ、装飾部１７の端部の剥離防止を図る
凹部である。また、２７は、パッド１１をステアリング
ホイール本体に係止させる係止脚、２８は、係止脚２７
を利用してパッド１１をステアリングホイール本体に組
み付ける際、ステアリングホイール本体の所定部位に当
接してパッド１１の落ち込みを防止する位置規制突起、
２９は、被覆層１６の成形時に成形材料Ｍをインサート
１２表面側に導くための、成形用型３１のゲート部位に
位置する導入孔、３０は、インサート１２の補強用のリ
ブである。また、既述の第貫通孔１３と環状溝２４とは
、それぞれ中央のリブ３０ｃにより左右の第一貫通孔１
３Ａ・１３Ｂと環状溝２４Ａ・２４Ｂとに分断されてい
る。Note that 26 indicates the first through hole 13 on the back side of the insert 12.
This is a recessed portion provided on the 0th periphery to prevent the end portion of the decorative portion 17 from peeling off. Further, 27 is a locking leg for locking the pad 11 to the steering wheel body, and 28 is a locking leg 27.
a position regulating protrusion that comes into contact with a predetermined part of the steering wheel body to prevent the pad 11 from falling when the pad 11 is assembled to the steering wheel body using the
Reference numeral 29 indicates an introduction hole located at the gate portion of the mold 31 for guiding the molding material M to the surface side of the insert 12 during molding of the coating layer 16, and 30 indicates a rib for reinforcing the insert 12. Moreover, the first through hole 13 and the annular groove 24 described above are connected to the left and right first through holes 1 by the central rib 30c, respectively.
It is divided into 3A and 13B and annular grooves 24A and 24B.
つぎに、このパッド１１の成形に使用する成形用型３１
について説明すると、この成形用型３１は、第１図に示
すように、型締め時に所定のキャビティ３１ａを形成す
る固定型３２と可動型３３とから構成されている。Next, a mold 31 used for molding this pad 11
To explain this, as shown in FIG. 1, this molding die 31 is composed of a fixed die 32 and a movable die 33, which form a predetermined cavity 31a when the mold is clamped.
固定型３２は、装飾部１７の表面側を含めた被覆層１６
の外表面を成形するとともに装飾部１７配置部位のイン
サート１２表面に当接する所定の型面３２ａを備えてい
る。The fixed mold 32 covers the coating layer 16 including the surface side of the decorative portion 17.
It is provided with a predetermined mold surface 32a that molds the outer surface of the insert 12 and comes into contact with the surface of the insert 12 where the decorative portion 17 is arranged.
可動型３３は、インサート１２裏面側の一般面に当接す
るとともに装飾部１７の裏面側を成形する所定の型面３
３ａを備えている。なお、可動型３３には、インサート
１２の導入孔２９に対応する位置に、成形材料Ｍを型締
め時のキャビティ３１ａ内へ注入できるよう、図示しな
いゲートが形成されている。The movable mold 33 has a predetermined mold surface 3 that contacts the general surface of the back side of the insert 12 and molds the back side of the decorative portion 17.
It is equipped with 3a. Note that a gate (not shown) is formed in the movable mold 33 at a position corresponding to the introduction hole 29 of the insert 12 so that the molding material M can be injected into the cavity 31a during mold clamping.
つぎに、このパッド１１の成形について説明する。Next, the formation of this pad 11 will be explained.
まず、型開き状態の可動型３３の所定位置にインサート
１２をセットし、型締めする。First, the insert 12 is set in a predetermined position of the movable mold 33 in an open state, and the mold is clamped.
そして、図示しないゲート部位から成形材料Ｍを注入す
る。Then, the molding material M is injected from a gate portion (not shown).
その際、成形材料Ｍは図示しないゲート部位からインサ
ート１２表面側へ流れて、装飾部１７周囲の被覆層１６
が形成される。そしてさらに、第６図に示すように、成
形材料Ｍは、装飾部１７周囲の小孔２３からインサート
１２裏面側へ流れ、成形用型３１における可動型３３の
型面３３ａとインサート１２の環状溝２４との間隙へ流
れる。At this time, the molding material M flows from the gate portion (not shown) toward the surface of the insert 12 and coats the coating layer 16 around the decorative portion 17.
is formed. Further, as shown in FIG. 6, the molding material M flows from the small hole 23 around the decorative part 17 to the back side of the insert 12, and flows between the mold surface 33a of the movable mold 33 in the molding mold 31 and the annular groove of the insert 12. It flows into the gap between 24 and 24.
その後、成形材料Ｍは、型面３３ａと環状溝２４Ａとの
間隙から型面３３ａと導入凹溝２５との間隙へ流れて、
さらに、インサート１２の第一貫通孔１３Ａを経てイン
サー）１２の表面側へ流れる。なお、この時、成形材料
Ｍは、第６図に示す左方の第一貫通孔１３Ｂへは、イン
サート１２の表面側を経て支障無く漬れることとなる（
第２図参照）。Thereafter, the molding material M flows from the gap between the mold surface 33a and the annular groove 24A to the gap between the mold surface 33a and the introduction groove 25,
Furthermore, it flows through the first through hole 13A of the insert 12 to the surface side of the insert 12. In addition, at this time, the molding material M will be immersed into the first through hole 13B on the left side shown in FIG. 6 through the surface side of the insert 12 without any problem (
(See Figure 2).
そして、成形材料Ｍは、第１図に示すように、各隔壁１
５を乗り越えるとともに各第二貫通孔１４を経てインサ
ート１２の裏面側へ流れ、その間に装飾部１７が形成さ
れることとなる。Then, the molding material M is applied to each partition wall 1 as shown in FIG.
5 and flows to the back side of the insert 12 through each second through hole 14, and a decorative portion 17 is formed therebetween.
その際、装飾部１７の形成部位における成形材料Ｍの流
れ方向の端部がインサート１２の裏面側となって、成形
材料Ｍがインサート１２の裏面側で行き止まりとなるよ
うに構成したことから、キャビティ３１ａの装飾部１７
を形成する部位にエアが１１込まれても、そのエアによ
るエア溜りは装飾部１７の形成部位の端部であるインサ
ート１２の裏面側に発生する。At that time, the end of the molding material M in the flow direction at the forming part of the decorative portion 17 is on the back side of the insert 12, and the molding material M is configured to dead end on the back side of the insert 12, so that the cavity Decorative part 17 of 31a
Even if air is introduced into the portion where the decorative portion 17 is formed, an air pocket due to the air is generated on the back side of the insert 12, which is the end of the portion where the decorative portion 17 is formed.
その後、装飾部１７を含んだ被覆層１６を成形した後、
型開きさせて成形品を取り出せば、装飾部１７の表面側
にエア溜りの発生していないパッド１１を得ることがで
き、既述の発明の作用・効果の欄で述べたと同様な効果
を奏する。After that, after forming the covering layer 16 including the decorative part 17,
By opening the mold and taking out the molded product, it is possible to obtain a pad 11 in which no air pockets are generated on the surface side of the decorative portion 17, and the same effects as described in the section of the functions and effects of the invention described above can be obtained. .
第１図は、この発明の一実施例を示す成形時の成形用型
の部分断面図であり、第３・６図の１−１部位に対応し
、
第２図は、同実施例により製造するパッドの表面側から
見た図、
第３図は、同実施例により製造するパッドの裏面側から
見た部分省略図、
第４図は、同実施例に使用するインサートの表面側から
見た図、
第５図は、同実施例に使用するインサートの裏面側から
見た部分省略図、
第６図は、同実施例に使用するインサートの裏面側の部
分拡大図、
第７図は、第３・６図の■−■部位に対応する同実施例
の部分断面図、
第８図は、従来例を示すパッドの部分断面図である。
１６・・・被覆層、
１７・・・装飾部。
人
豊田合成株式会社
１・・・（成形品）パッド、
２・・・インサート、
３・・・第一貫通孔、
４・・・第二貫通孔、
５・・・隔壁、
纂
図FIG. 1 is a partial sectional view of a mold for molding according to an embodiment of the present invention, and corresponds to the 1-1 part in FIGS. 3 and 6. FIG. Fig. 3 is a partially omitted view of the pad manufactured according to the same example as seen from the back side, and Fig. 4 is a view of the insert used in the same example as seen from the front side. Figure 5 is a partially omitted view of the insert used in the same example as seen from the back side, Figure 6 is a partially enlarged view of the back side of the insert used in the same example, and Figure 7 is a partial enlarged view of the back side of the insert used in the same example. FIG. 8 is a partial cross-sectional view of a pad showing a conventional example. 16...Covering layer, 17...Decoration part. Hitoshi Toyoda Gosei Co., Ltd. 1... (Molded product) Pad, 2... Insert, 3... First through hole, 4... Second through hole, 5... Partition wall, schematic diagram
Claims (1)
の装飾部が配置される二色成形品の製造方法であつて、 前記インサートには、前記装飾部配置部位に形成される
第一貫通孔と、前記装飾部配置部位内の周縁で隔壁を隔
てて前記第一貫通孔に隣接して形成される第二貫通孔と
、が配設され、 成形時、前記装飾部成形材料を、前記インサート裏面側
から前記第一貫通孔を経て前記インサート表面側へ流し
、その後、前記インサート表面側から前記第二貫通孔を
経て前記インサート裏面側へ流すことにより、前記装飾
部を形成することを特徴とする二色成形品の製造方法。[Scope of Claims] A method for manufacturing a two-color molded product in which a synthetic resin decorative part protruding from the insert is arranged on the insert surface, wherein the insert has a second part formed in the decorative part arrangement area. a continuous through hole and a second through hole formed adjacent to the first through hole with a partition wall in between at a peripheral edge within the decorative portion arrangement region, and during molding, the decorative portion molding material is disposed. , forming the decorative portion by flowing from the back side of the insert through the first through hole to the front side of the insert, and then flowing from the front side of the insert to the back side of the insert through the second through hole; A method for manufacturing a two-color molded product characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11065289A JPH02289319A (en) | 1989-04-28 | 1989-04-28 | Manufacture of two-color molded product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11065289A JPH02289319A (en) | 1989-04-28 | 1989-04-28 | Manufacture of two-color molded product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02289319A true JPH02289319A (en) | 1990-11-29 |
Family
ID=14541093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11065289A Pending JPH02289319A (en) | 1989-04-28 | 1989-04-28 | Manufacture of two-color molded product |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02289319A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009293555A (en) * | 2008-06-06 | 2009-12-17 | Toyota Boshoku Corp | Cylinder head cover |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5876243A (en) * | 1981-10-31 | 1983-05-09 | Toyoda Gosei Co Ltd | Manufacture of injection molded item with letter or mark |
-
1989
- 1989-04-28 JP JP11065289A patent/JPH02289319A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5876243A (en) * | 1981-10-31 | 1983-05-09 | Toyoda Gosei Co Ltd | Manufacture of injection molded item with letter or mark |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009293555A (en) * | 2008-06-06 | 2009-12-17 | Toyota Boshoku Corp | Cylinder head cover |
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