JPH01195031A - Preparation of molding - Google Patents
Preparation of moldingInfo
- Publication number
- JPH01195031A JPH01195031A JP1928888A JP1928888A JPH01195031A JP H01195031 A JPH01195031 A JP H01195031A JP 1928888 A JP1928888 A JP 1928888A JP 1928888 A JP1928888 A JP 1928888A JP H01195031 A JPH01195031 A JP H01195031A
- Authority
- JP
- Japan
- Prior art keywords
- molded product
- resin
- cut
- molding
- extrusion
- 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.)
- Granted
Links
- 238000000465 moulding Methods 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title 1
- 238000005520 cutting process Methods 0.000 claims abstract description 55
- 238000001125 extrusion Methods 0.000 claims abstract description 46
- 238000000034 method Methods 0.000 claims abstract description 12
- 239000002344 surface layer Substances 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 235000012438 extruded product Nutrition 0.000 claims description 9
- 229920005989 resin Polymers 0.000 abstract description 46
- 239000011347 resin Substances 0.000 abstract description 46
- 239000011162 core material Substances 0.000 abstract description 7
- 238000007664 blowing Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 5
- 239000000919 ceramic Substances 0.000 description 4
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 229920003002 synthetic resin Polymers 0.000 description 3
- 239000000057 synthetic resin Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- -1 polyethylene terephthalate Polymers 0.000 description 2
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Classifications
-
- 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
- B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
- B29C67/0044—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 for shaping edges or extremities
-
- 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
- B29C2793/00—Shaping techniques involving a cutting or machining operation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
- B29L2031/3005—Body finishings
- B29L2031/302—Trim strips
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は合成樹脂の押出成形品に切断してモールディ
ングを製造する方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for producing moldings by cutting into extruded synthetic resin products.
車両用の合成樹脂モールディングの製造方法として、合
成樹脂の押出成形品を一定寸法に切断してモールディン
グを製造する方法がある。ところが押出成形品を切断す
ると、切断面が露出して装飾性を害するとともに、エツ
ジが危険であるため、切断部にエンドキャンプを形成す
るなどの端末処理を行う必要がある。2. Description of the Related Art As a method for manufacturing synthetic resin moldings for vehicles, there is a method of manufacturing moldings by cutting an extrusion molded product of synthetic resin into predetermined dimensions. However, when an extrusion molded product is cut, the cut surface is exposed, impairing its decorative properties, and the edges are dangerous, so it is necessary to perform terminal treatment such as forming an end camp at the cut portion.
このような点を改善するために、冷却した押出成形品を
、高周波電圧を印加した切断刃により切断する方法が提
案されている（例えば特開昭５４−１１９７７号、同６
１−１０８０２７号）。In order to improve these points, a method has been proposed in which a cooled extrusion molded product is cut using a cutting blade to which a high frequency voltage is applied (for example, Japanese Patent Laid-Open Nos. 54-11977 and 6
1-108027).
しかしながら、このような従来の切断方法では、切断刃
に高周波電圧を印加しているため、切断刃付近の樹脂が
溶融して、他の部分とは異なった外観を有する切断面が
形成されるとともに、溶融部分に切断刃が接するために
、切断面が乱れて装飾性を害するという問題点があった
。However, in such conventional cutting methods, a high frequency voltage is applied to the cutting blade, which melts the resin near the cutting blade, forming a cut surface that has a different appearance from other parts. However, since the cutting blade comes into contact with the molten part, the cut surface becomes disordered, which impairs the decorativeness.
押出成形は成形が容易であり、得られた押出成形品は一
定の連続模様からなる装飾模様を有するが、単なる切断
やエンドキャップの場合は連続模様が遮断され、また高
周波加熱を伴う切断では模様が切断面で乱れて連続性が
なくなって装飾性を害し、押出成形の利点を損う。Extrusion molding is easy to mold, and the resulting extruded product has a decorative pattern consisting of a certain continuous pattern, but in the case of simple cutting or end capping, the continuous pattern is interrupted, and in the case of cutting with high frequency heating, the pattern is is disturbed at the cut surface and loses its continuity, impairing its decorative properties and detracting from the advantages of extrusion molding.
この発明の目的は、上記問題点を解決するため、他の部
分と連続した外観を有する曲面状の端部が形成され、か
つ切断面が目立たず、優れた装飾性を有するように押出
成形品を切断することが可能で、押出成形と切断によっ
て外観の優れたモールディングを製造できる方法を提案
することである。An object of the present invention is to solve the above-mentioned problems by producing an extrusion molded product in which a curved end having a continuous appearance with other parts is formed, the cut surface is not noticeable, and the cut surface has excellent decorative properties. The purpose of the present invention is to propose a method that can produce moldings with excellent appearance by extrusion molding and cutting.
〔課題を解決するための手段〕
この発明は、（ｉ）熱可塑性樹脂の押出成形により押出
成形品を製造する工程と、
（Ｒ）得られた押出成形品の内部を軟化させ、外表面部
は内部よりも硬度が高くなるように加熱した状態で、切
断刃を外表面側から前進させて押出成形品を切断し、モ
ールディングを製造する工程とを含むモールディングの
製造方法である。[Means for Solving the Problems] The present invention includes (i) a step of manufacturing an extrusion molded product by extrusion molding of a thermoplastic resin, and (R) softening the inside of the obtained extrusion molding and softening the outer surface of the extrusion molded product. is a method for manufacturing a molding, which includes the step of manufacturing a molding by advancing a cutting blade from the outer surface side to cut the extrusion molded product in a heated state so that the hardness is higher than that of the inside.
この発明において熱可塑性樹脂としては、スチレン樹脂
、塩化ビニル樹脂、ポリオレフィン樹脂などが使用でき
る。In this invention, as the thermoplastic resin, styrene resin, vinyl chloride resin, polyolefin resin, etc. can be used.
第１工程の押出成形は通常の押出成形を行うことができ
るが、二重成形等により、外表面の少なくとも一部にモ
ールティング本体とは異なる表層部を有する押出成形品
を形成するのが好ましい。The extrusion molding in the first step can be carried out by ordinary extrusion molding, but it is preferable to form an extrusion molded product having a surface layer different from the molding body on at least a part of the outer surface by double molding etc. .
第２工程の切断に際して、押出成形品の加熱は、押出成
形品の外表面が常温の空気等により冷却される状Ｊぶて
、高周波誘電加熱により切断部を全体加熱する方法が好
ましいが、オーブン、遠赤外線等により加熱してもよい
。切断刃は加熱する必要はなく、むしろ一定温度に保つ
ように冷却した方がよい。切断刃の前進速度は押出成形
品の外表面部が途中で切断されない程度の速度であるこ
とが望ましい。切断に際しては、押出成形品に引張力を
加えた状態で切断するのが望ましい。When cutting the extruded product in the second step, it is preferable to heat the extruded product using a method in which the outer surface of the extruded product is cooled with air at room temperature, or to heat the entire cut part using high-frequency dielectric heating. , far infrared rays, etc. may be used. The cutting blade does not need to be heated, but rather should be cooled to maintain a constant temperature. The advancing speed of the cutting blade is preferably such that the outer surface of the extruded product is not cut halfway. When cutting, it is desirable to cut the extruded product while applying a tensile force.
この発明のモールディングの製造方法においては、まず
第１工程において、熱可塑性樹脂の押出成形により押出
成形品を製造する。In the molding manufacturing method of the present invention, in the first step, an extrusion molded product is manufactured by extrusion molding of a thermoplastic resin.
次に第２工程において、上記で得られた押出成形品を加
熱して内部を軟化させ、外表面部は内部よりも硬度が高
い状態で、切断刃を外表面側から前進させると、外表面
部は硬度が高いため切断刃により切断あるいは破断され
ることなく押され、このため内部の軟化状態の樹脂は周
辺部に移動する。この状態で切断刃がさらに前進すると
、切断部の外表面部は他の部分と連続した外観を保った
まま曲面状に変形して、曲面状の端部が形成された状態
で切断される。切断面は内部の樹脂が露出しない状態で
、裏面側に狭い幅で形成されるので外表面側から目立た
ず、エン１−キャンプ等の端末処理をしなくても、押出
成形と切断により優れた外観のモールディングが得られ
る。Next, in the second step, the extrusion molded product obtained above is heated to soften the inside, and when the cutting blade is advanced from the outside surface with the outside surface being harder than the inside, the outside surface Since the part has high hardness, it is pushed by the cutting blade without being cut or broken, and the softened resin inside moves to the peripheral part. When the cutting blade moves further in this state, the outer surface of the cutting part deforms into a curved shape while maintaining an appearance continuous with other parts, and is cut with a curved end formed. The cut surface is formed with a narrow width on the back side without exposing the internal resin, so it is not noticeable from the outside surface side, and it is excellent in extrusion molding and cutting without the need for end treatment such as en-1-camp. Exterior molding is obtained.
以下、本発明を図面の実施例により説明する。 Hereinafter, the present invention will be explained with reference to embodiments of the drawings.
第１図は押出成形状態を示す斜視図、第２図は切断状態
を示す正面図、第３図ないし第５図はその拡大断面図、
第６図は得られたモールティングの斜視図である。FIG. 1 is a perspective view showing the extruded state, FIG. 2 is a front view showing the cut state, and FIGS. 3 to 5 are enlarged sectional views thereof.
FIG. 6 is a perspective view of the molding obtained.
第１図において、１は押出成形型、２は押出成形品であ
る。第１工程の押出成形は、押出成形型１に芯材３を供
給するとともに、熱可塑性樹脂からなる本体樹脂４およ
びこの本体樹脂と異色の装飾用の表ＷＪ樹脂５を供給し
て二重押出成形を行い、押出成形品２を製造する。芯材
３としてはポリエチレンテレフタレート樹脂、ガラス繊
維布等の経時伸縮の少ないシート状またはひも状のもの
が好ましく、押出成形品２の長手方向全長にわたって埋
設される。本体樹脂４および表層樹脂５はそれぞれ軟質
ｐｖｃ樹脂等の相溶性を有する樹脂が好ましい。In FIG. 1, 1 is an extrusion mold, and 2 is an extrusion molded product. In the first step of extrusion molding, a core material 3 is supplied to an extrusion mold 1, and a main body resin 4 made of thermoplastic resin and a decorative WJ resin 5 of a different color from this main body resin are supplied, and double extrusion is carried out. Molding is performed to produce an extrusion molded product 2. The core material 3 is preferably a sheet or string material that does not expand or contract over time, such as polyethylene terephthalate resin or glass fiber cloth, and is embedded over the entire length of the extrusion molded product 2 in the longitudinal direction. The main resin 4 and the surface resin 5 are each preferably made of compatible resin such as soft PVC resin.
第２図ないし第５図において、６は切断装置て、押出成
形品２を載置するＦＲＰ製の受台７、セラミック製のダ
イス８、銅製のアース電極９およびセラミック製の受台
１０を有する。受台７に対向してクランプ］１が配置さ
れている。ダイス８とアース電極９の間に形成された間
隙Ｓに対向して切断刃１２が設けられ、往復動してダイ
ス８との間で成形品２を切断するようになっている。切
断刃１２はセラミック、非磁性金属にセラミックを蒸着
した材料などからなり、成形品２のモールディング部１
３から分離される切除部１４側にテーパ面１２ａを有し
、刃先はあまり鋭利にされていないが、その先端は平滑
にされているのが好ましい。また切断刃１２は成形品２
の切断形状に形成されている。In FIGS. 2 to 5, reference numeral 6 denotes a cutting device, which has an FRP pedestal 7 on which the extrusion molded product 2 is placed, a ceramic die 8, a copper earth electrode 9, and a ceramic pedestal 10. . A clamp] 1 is arranged opposite to the pedestal 7. A cutting blade 12 is provided opposite the gap S formed between the die 8 and the earth electrode 9, and is configured to reciprocate to cut the molded product 2 between the die 8 and the die 8. The cutting blade 12 is made of a material such as ceramic or non-magnetic metal with ceramic vapor-deposited, and is used to cut the molding part 1 of the molded product 2.
It has a tapered surface 12a on the side of the cutting section 14 that is separated from the blade 3, and the cutting edge is not very sharp, but it is preferable that the tip is smooth. In addition, the cutting blade 12 is the molded product 2.
It is formed into a cut shape.
切断刃１２のダイス８側の上部には銅製の高周波電極１
５が設けられて高周波電源に接続され、アース電極９と
の間に高周波電圧を印加して、成形品２の切断部１６付
近を高周波誘電加熱するようになっている。切断刃１２
および高周波電極１５は略相似形状で重ねて配置され、
切断刃１２は高周波電極１５に沿って往復動するように
なっており、ダイス８および間隙Ｓもこれに対応した形
状となっている。A high frequency electrode 1 made of copper is placed on the upper part of the cutting blade 12 on the die 8 side.
5 is provided and connected to a high frequency power source, and a high frequency voltage is applied between it and the earth electrode 9 to perform high frequency dielectric heating around the cut portion 16 of the molded product 2. Cutting blade 12
and the high frequency electrodes 15 are arranged overlapping each other in substantially similar shapes,
The cutting blade 12 is adapted to reciprocate along the high frequency electrode 15, and the die 8 and the gap S are also shaped accordingly.
アース電極９はアースに接続されている。１７．１８は
成形品２の両端部を引張るチャック、１９．２０は成形
品２の切断部１６付近の外表面を冷却する空気吹出管、
２１は製造されたモールディング、２２は端部、２３は
切断面である。Earth electrode 9 is connected to earth. 17.18 is a chuck that pulls both ends of the molded product 2; 19.20 is an air blowing pipe that cools the outer surface of the molded product 2 near the cut portion 16;
21 is a manufactured molding, 22 is an end portion, and 23 is a cut surface.
第２工程における押出成形品２の切断方法は、押出成形
品２を第２図に示すように、切断装置６の受台７に載置
し、クランプ１１を前進させて受台７との間で成形品２
をクランプする。このときチャック１７．１８により成
形品２の両端を引張って引張力を与える。そして高周波
電極１５とアース電極９の間に高周波電圧を印加して、
高周波誘電加熱により、成形品２の切断部１６付近の樹
脂を加熱するとともに、空気吹出管１９．２０から冷却
用の空気を吹出して外表面部２ａを冷却する。高周波誘
電加熱により成形品２の切断部１６付近の樹脂は外表面
部２ａ、内部２ｂとも均等に常温以上の温度に加熱され
るが、外表面部２ａは冷却用の空気で冷却されるため、
内部２ｂより低温となる。そこで内部２ｂが軟化する程
度に加熱すると、外表面部２ａは内部２ｂよりも硬度が
高くなる。この状態で第３図に示すように、空気吹出管
１９．２０から吹出される冷却用の空気により一定温度
に保たれている切断刃１２を外表面側から前進させると
、外表面部２ａは硬度が高いため、第４図に示すように
、切断刃１２により切断あるいは破断されることなく、
そのまま引伸ばされるように押され、内部２ｂの樹脂は
周辺部に移動する。このとき切断刃１２の切除部１４側
はテーパ面１２ａが形成されているため、多くの樹脂が
テーパ面１２ａに沿って押出されて切除部１４側に移動
し、一部の樹脂は反対側のモールディング部１３にも移
動して、切断部１６に形成される端部２２付近の外表面
部２ａにわずかに盛り上がって凸部を形成しやすいが、
チャック１７．１８により切除部１４に引張力を加える
と、切断部１６の軟化樹脂のほとんどは切除部１４側へ
移動し、モールディング部１３における樹脂の盛り上が
りは防止される。この状態で切断刃１２がさらに前進す
ると、第５図に示すように、モールディング部１３の切
断部１６の外表面部２ａは、他の部分と連続した外観を
保ったまま曲面状に変形して、滑らかな曲面状の端部２
２が形成された状態で切断され、第６図に示すようなモ
ールディング２１が製造される。The cutting method of the extrusion molded product 2 in the second step is as shown in FIG. Molded product 2
to clamp. At this time, the chucks 17 and 18 pull both ends of the molded product 2 to apply tensile force. Then, applying a high frequency voltage between the high frequency electrode 15 and the earth electrode 9,
High-frequency dielectric heating heats the resin near the cut portion 16 of the molded product 2, and cools the outer surface portion 2a by blowing out cooling air from the air blowing pipes 19 and 20. By high-frequency dielectric heating, the resin near the cut portion 16 of the molded product 2 is heated equally to a temperature higher than room temperature on both the outer surface portion 2a and the inner portion 2b, but since the outer surface portion 2a is cooled by cooling air,
The temperature is lower than that of the inside 2b. Therefore, when heated to such an extent that the inside 2b becomes soft, the outer surface portion 2a becomes harder than the inside 2b. In this state, as shown in FIG. 3, when the cutting blade 12, which is maintained at a constant temperature by cooling air blown from the air blowing pipes 19 and 20, is advanced from the outer surface side, the outer surface portion 2a Because of its high hardness, it will not be cut or broken by the cutting blade 12, as shown in FIG.
The resin in the interior 2b moves to the periphery as it is stretched and pushed. At this time, since a tapered surface 12a is formed on the cutout section 14 side of the cutting blade 12, much of the resin is extruded along the tapered surface 12a and moves to the cutout section 14 side, and some resin is transferred to the opposite side. It tends to move to the molding part 13 and form a slightly raised convex part on the outer surface part 2a near the end part 22 formed in the cut part 16,
When a tensile force is applied to the cutout part 14 by the chucks 17 and 18, most of the softened resin in the cutout part 16 moves to the cutout part 14 side, and swelling of the resin in the molding part 13 is prevented. When the cutting blade 12 moves further in this state, the outer surface portion 2a of the cutting portion 16 of the molding portion 13 deforms into a curved shape while maintaining an appearance continuous with other portions, as shown in FIG. , smooth curved end 2
2 is cut, and a molding 21 as shown in FIG. 6 is manufactured.
このとき表層樹脂５および芯材３も外表面部２ａととも
に切断刃１２によって切断または破断されることなく、
そのまま引伸ばされるように押され、最終的に裏面部２
ｃと接着した状態で切断され、裏面部２ｃ付近に切断面
２３が形成される。このため表層樹脂５は端部２２にお
いても連続し、また芯材３および表層樹脂５の切断面も
目立たなくなる。芯材３は成形品２の樹脂と同色または
透明なものにすると、露出しても目立たないから好まし
い。At this time, the surface resin 5 and the core material 3 are not cut or broken by the cutting blade 12 together with the outer surface portion 2a.
It is pushed as it is stretched and finally the back part 2
It is cut while adhering to c, and a cut surface 23 is formed near the back surface portion 2c. Therefore, the surface layer resin 5 is continuous even at the end portion 22, and the cut surfaces of the core material 3 and the surface layer resin 5 are also inconspicuous. It is preferable that the core material 3 be made of the same color as the resin of the molded product 2 or transparent because it will not be noticeable even if exposed.
切断刃１２によって形成される切断面２３は、内部２ｂ
の樹脂が外表面側に露出せず、外表面部２ａと裏面部２
ｃとが接着した状態で、裏面部２ｃ付近に形成されるた
め、外表面側から目立たない。従ってエンドキャップ等
により切断面２３を端末処理しなくても、優れた外観の
モールディング２１が得られ、そのままの状態で使用可
能である。The cutting surface 23 formed by the cutting blade 12 is
The resin is not exposed on the outer surface side, and the outer surface portion 2a and the back surface portion 2
Since it is formed in the vicinity of the back surface portion 2c in a state in which it is adhered to the surface of the surface 2c, it is not noticeable from the outer surface side. Therefore, the molding 21 with an excellent appearance can be obtained without terminating the cut surface 23 with an end cap or the like, and can be used as is.
また成形品２の外表面部２ａを強制的に冷却する空気吹
出管からの冷却用の空気は必ずしも必要ではなく、成形
品２の切断部の肉厚が薄い場合には常温の空気による冷
却のみでよい。In addition, cooling air from the air blowing pipe that forcibly cools the outer surface 2a of the molded product 2 is not necessarily necessary, and if the cut portion of the molded product 2 is thin, cooling with room-temperature air is sufficient. That's fine.
なお、引張力は切断刃１２の前進に伴って徐々に小さく
なるように設定しておくのが好ましいが、切断の途中段
階で停止させてもよい。また引張力を加える時点は、切
断刃１２が成形品２に接触する前でも、後でも、同時で
もよい。Although it is preferable to set the tensile force so that it gradually decreases as the cutting blade 12 moves forward, it may be stopped in the middle of cutting. The tensile force may be applied before, after, or at the same time as the cutting blade 12 contacts the molded product 2.
第７図ないし第１０図は他の実施例の押出成形品を示し
、それぞれ（Ａ）は断面図、（Ｂ）は端部の縦断面図で
ある。第７図では本体樹脂４に埋設された表層樹脂５は
透明樹脂からなり、その下に埋設された着色樹脂フィル
ム等の装飾フィルム２４が外表面側から視認できるよう
になっている。第８図では本体樹脂４が発泡樹脂、表層
樹脂５が非発泡樹脂からなり、軽量化、低コスト化され
ている。第９図では本体樹脂４が通常の樹脂、表層樹脂
５が耐候性、耐スクラッチ性を有する樹脂からなり、低
コストで高性能化されている。第１０図では本体樹脂４
の外表面に装飾フィルム、塗装等の表層膜２５が形成さ
れており、装飾性が高められている。7 to 10 show extrusion molded products of other embodiments, in which (A) is a cross-sectional view and (B) is a longitudinal cross-sectional view of the end portion. In FIG. 7, the surface layer resin 5 embedded in the main body resin 4 is made of transparent resin, and the decorative film 24 such as a colored resin film buried thereunder is visible from the outer surface side. In FIG. 8, the main body resin 4 is made of a foamed resin, and the surface resin 5 is made of a non-foamed resin, thereby reducing weight and cost. In FIG. 9, the main body resin 4 is made of a normal resin, and the surface resin 5 is made of a resin having weather resistance and scratch resistance, thus achieving high performance at low cost. In Figure 10, the main body resin 4
A surface film 25 such as a decorative film or paint is formed on the outer surface of the holder to enhance its decorativeness.
また表層部は部分的な光沢部と艶消し部との組合せであ
ってもよい。上記の場合、いずれも切断により、表層部
は連続した均一な端部が形成され、切断面は裏面部付近
に形成され、目立たない。Further, the surface layer portion may be a combination of a partial glossy portion and a matte portion. In all of the above cases, by cutting, a continuous and uniform end portion is formed in the surface layer portion, and the cut surface is formed near the back surface portion and is not noticeable.
なお、以上の説明において、押出成形品２およびその表
層部の形状、構造、材質等は限定されない。また切断刃
１２の刃先にはポリテトラフルオロエチレン樹脂等の滑
性皮膜を形成しておくのが好ましい。In the above description, the shape, structure, material, etc. of the extruded product 2 and its surface layer are not limited. Further, it is preferable to form a slippery film of polytetrafluoroethylene resin or the like on the cutting edge of the cutting blade 12.
本発明によれば、熱可塑性樹脂により押出成形品を製造
し、その押出成形品の内部を軟化させ、外表面部は内部
よりも硬度が高くなるような状態で切断してモールディ
ングを製造するようにしたため、他の部分と連続した外
観を有する曲面状の端部が形成され、かつ切断面が目立
たず、優れた外観を有するモールディングを押出成形と
切断工程の簡単な操作により製造することができる。According to the present invention, a molding is manufactured by manufacturing an extrusion molded product using a thermoplastic resin, softening the inside of the extrusion molding, and cutting the extrusion molded product in such a state that the outer surface part is harder than the inside part. As a result, a curved edge with a continuous appearance with other parts is formed, and the cut surface is not noticeable, making it possible to manufacture moldings with an excellent appearance by simple extrusion and cutting processes. .
第１図は押出成形状態を示す斜視図、第２図は切断状態
を示す正面図、第３図ないし第５図はその拡大断面図、
第６図は得られたモールディングの斜視図、第７図ない
し第１０図は他の実施例の押出成形品を示し、それぞれ
（Ａ）は断面図、（Ｂ）は端部の縦断面図である。
各図中、同一符号は同一または相当部分を示し、１は押
出成形型、２は押出成形品、２ａは外表面部、２ｂは内
部、２ｃは裏面部、３は芯材、４は本体樹脂、５は表層
樹脂、６は切断装置、７．１０は受台、９はアース電極
、１］はクランプ、１２は切断刃、１４は切除部、１５
は高周波電極、１６は切断部、２１はモールディング、
２２は端部、２３は切断面である。
代理人 弁理士 柳 原 成
１− ＬＮ ｒｇ 、ｌＪ Ｕ Ｍ ４ヘ
ヘヘ
１＜
図
図
図FIG. 1 is a perspective view showing the extruded state, FIG. 2 is a front view showing the cut state, and FIGS. 3 to 5 are enlarged sectional views thereof.
FIG. 6 is a perspective view of the obtained molding, and FIGS. 7 to 10 show extrusion molded products of other examples, in which (A) is a sectional view and (B) is a longitudinal sectional view of the end. be. In each figure, the same reference numerals indicate the same or equivalent parts, 1 is the extrusion mold, 2 is the extrusion molded product, 2a is the outer surface part, 2b is the inside part, 2c is the back part, 3 is the core material, 4 is the main resin , 5 is a surface resin, 6 is a cutting device, 7.10 is a pedestal, 9 is a ground electrode, 1] is a clamp, 12 is a cutting blade, 14 is a cutting part, 15
is a high frequency electrode, 16 is a cutting part, 21 is a molding,
22 is an end portion, and 23 is a cut surface. Agent Patent Attorney Sei Yanagihara 1- LN rg, lJ U M 4hehehe1< Diagram
Claims (4)
を製造する工程と、 （Ｒ）得られた押出成形品の内部を軟化させ、外表面部
は内部よりも硬度が高くなるように加熱した状態で、切
断刃を外表面側から前進させて押出成形品を切断し、モ
ールディングを製造する工程とを含むモールディングの
製造方法。(1) (i) A process of manufacturing an extrusion molded product by extrusion molding of a thermoplastic resin; (R) softening the inside of the obtained extrusion molded product so that the outer surface part is harder than the inside part; A method for producing a molding, comprising the step of cutting an extrusion molded product by advancing a cutting blade from the outer surface side in a heated state to produce a molding.
本体とは異なる表層部を形成するものである請求項１記
載の方法。(2) The method according to claim 1, wherein the extrusion molding forms a surface layer portion different from the molding body on the outer surface of the extrusion molded product.
却される状態で高周波誘電加熱により行われるものであ
る請求項１または２記載の方法。(3) The method according to claim 1 or 2, wherein the heating in the cutting step is performed by high-frequency dielectric heating while the outer surface of the extruded product is cooled.
求項１ないし３のいずれかに記載の方法。(4) The method according to any one of claims 1 to 3, wherein the cutting is performed while applying a tensile force to the extruded product.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1928888A JPH01195031A (en) | 1988-01-29 | 1988-01-29 | Preparation of molding |
| US07/289,831 US4940557A (en) | 1987-12-28 | 1988-12-27 | Method of manufacturing molding members |
| EP88312345A EP0323213B1 (en) | 1987-12-28 | 1988-12-28 | Method of manufacturing molding members |
| DE3888507T DE3888507T2 (en) | 1987-12-28 | 1988-12-28 | Process for the production of cast products. |
| CA000587083A CA1307891C (en) | 1987-12-28 | 1988-12-28 | Method of manufacturing molding members |
| AU27587/88A AU593753B2 (en) | 1987-12-28 | 1988-12-29 | Method of manufacturing molding members |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1928888A JPH01195031A (en) | 1988-01-29 | 1988-01-29 | Preparation of molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01195031A true JPH01195031A (en) | 1989-08-04 |
| JPH0528980B2 JPH0528980B2 (en) | 1993-04-28 |
Family
ID=11995256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1928888A Granted JPH01195031A (en) | 1987-12-28 | 1988-01-29 | Preparation of molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01195031A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010076081A (en) * | 2008-09-29 | 2010-04-08 | Fujifilm Corp | Method for cutting resin sheet with protective film |
| JP2012240555A (en) * | 2011-05-19 | 2012-12-10 | Toyota Motor Corp | Vehicle interior material, and method of manufacturing the same |
-
1988
- 1988-01-29 JP JP1928888A patent/JPH01195031A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010076081A (en) * | 2008-09-29 | 2010-04-08 | Fujifilm Corp | Method for cutting resin sheet with protective film |
| JP2012240555A (en) * | 2011-05-19 | 2012-12-10 | Toyota Motor Corp | Vehicle interior material, and method of manufacturing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0528980B2 (en) | 1993-04-28 |
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