JPS59201831A - Preparation of vinyl chloride molded article - Google Patents
Preparation of vinyl chloride molded articleInfo
- Publication number
- JPS59201831A JPS59201831A JP58076373A JP7637383A JPS59201831A JP S59201831 A JPS59201831 A JP S59201831A JP 58076373 A JP58076373 A JP 58076373A JP 7637383 A JP7637383 A JP 7637383A JP S59201831 A JPS59201831 A JP S59201831A
- Authority
- JP
- Japan
- Prior art keywords
- vinyl chloride
- mold
- chloride paste
- foamed
- molded article
- 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
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 title claims abstract description 43
- 239000011248 coating agent Substances 0.000 claims abstract description 4
- 238000000576 coating method Methods 0.000 claims abstract description 4
- 238000005507 spraying Methods 0.000 claims abstract description 4
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 239000004088 foaming agent Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 11
- 238000001816 cooling Methods 0.000 abstract 1
- 238000003756 stirring Methods 0.000 abstract 1
- 239000011347 resin Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 210000003491 skin Anatomy 0.000 description 5
- 238000001125 extrusion Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000004014 plasticizer Substances 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 241000219492 Quercus Species 0.000 description 1
- 235000016976 Quercus macrolepis Nutrition 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 210000002615 epidermis Anatomy 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
- B29C44/14—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements the preformed part being a lining
-
- 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
- B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
- B29C37/0025—Applying surface layers, e.g. coatings, decorative layers, printed layers, to articles during shaping, e.g. in-mould printing
- B29C37/0028—In-mould coating, e.g. by introducing the coating material into the mould after forming the article
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
- B29K2027/06—PVC, i.e. polyvinylchloride
Landscapes
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は塩化ビニル成形体の製造方法に関し、特に発泡
塩化ビニルの内装と非発泡塩化ビニルの表皮層よりなる
塩化ビニル成形体の製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a vinyl chloride molded article, and more particularly to a method for manufacturing a vinyl chloride molded article comprising an interior layer made of foamed vinyl chloride and a skin layer made of non-foamed vinyl chloride.
発泡塩化ビニル成形体は多くの用途で使用されているが
、発泡層のみからなる一層塩化ビニル成形体では表面が
形崩れする等物理的衝撃に弱いため発泡層を所定厚さの
非発泡層で覆った二層塩化ビニル成形体か望まれている
。Foamed polyvinyl chloride molded products are used in many applications, but single-layered polyvinyl chloride molded products consisting only of a foamed layer are susceptible to physical impact, such as the surface losing its shape. A covered two-layer vinyl chloride molding is desired.
ところで、上記二層塩化ビニル成形体の製造方法として
は従来二層発泡押出成形法が知られている。この方法は
発泡剤を混入した塩化ビニル樹脂と混入しない塩化ビニ
ル樹脂を同時に押出成形するもので、前者は押出時に発
泡して内層となり、後者は非発泡の表皮層となる。By the way, as a method for manufacturing the above-mentioned two-layer vinyl chloride molded article, a two-layer foam extrusion molding method is conventionally known. In this method, vinyl chloride resin mixed with a foaming agent and vinyl chloride resin without foaming agent are simultaneously extruded, with the former foaming during extrusion to form the inner layer, and the latter forming the unfoamed outer layer.
この方法では内層をなす塩化ビニル樹脂の発泡倍率は２
倍程度にしかできない。というのは発泡倍率を高くする
と内層の膨脹により未だ固化していない表皮層の外形が
損なわれるからである。In this method, the expansion ratio of the vinyl chloride resin that forms the inner layer is 2.
It can only be doubled. This is because when the expansion ratio is increased, the outer shape of the unsolidified skin layer is damaged due to expansion of the inner layer.
本発明は上記従来方法の問題点に鑑み、きわめて発泡倍
率高い内層と正確に所定の形状を保った非発泡の表皮層
を有する塩化ビニル成形体を製造する方法を提供しよう
とするものである。In view of the above-mentioned problems of the conventional method, the present invention seeks to provide a method for manufacturing a vinyl chloride molded article having an inner layer with an extremely high expansion ratio and a non-foamed skin layer that maintains a precisely predetermined shape.
すなわち、本発明は型の内面に塗布あるいは吹附けによ
り所定厚さに非発泡の塩化ビニルペースト層を形成した
後、型内にあらかじめ気体を泡入せしめた塩化ビニルペ
ーストまたは発泡剤を含んだ塩化ビニルペーストを注入
し、型を加熱して上記非発泡塩化ビニルペーストを固化
せしめるとともに注入した塩化ビニルペーストを固化な
いし発泡固化せしめて一体成形することを特徴としてい
る。That is, the present invention involves forming a non-foamed vinyl chloride paste layer to a predetermined thickness by coating or spraying on the inner surface of a mold, and then applying a vinyl chloride paste containing a foaming agent or a vinyl chloride paste in which gas has been bubbled in advance into the mold. The method is characterized in that a vinyl paste is injected, the mold is heated to solidify the non-foamed vinyl chloride paste, and the injected vinyl chloride paste is solidified or foamed to solidify and then integrally molded.
以下、本発明を図示の実施例により説明する。Hereinafter, the present invention will be explained with reference to illustrated embodiments.
第１図において、１１は上型、１２は下型である。下型
１２には液晶形状に応じた凹部１２ａが設けてあり、上
型１１および下型１２を閉じることによりキャビティを
形成する。最初に、このキャビティを形成する上型１１
の下面と下型１２の凹部１２ａ表面に塗布あるいは吹付
けにより非発泡の塩化ビニル樹脂に可塑剤を加えてゾル
状のペーストにしたものである。続いてオークス形ミキ
サにより塩化ビニルペーストを十分攪拌して空気を泡入
せしめた塩化ビニルペースト３１を上型１１あるいは下
型１２のいずれかに形成した注入口よりキャビティ内に
注入する（第２図）。この後、金型を１２０℃〜２００
℃に加熱して上記塩化ビニルペースト２１、３１をゲル
化固化せしめ（第３図）、冷却して金型より取り出す（
第４図）。In FIG. 1, 11 is an upper mold, and 12 is a lower mold. The lower mold 12 is provided with a recess 12a corresponding to the shape of the liquid crystal, and a cavity is formed by closing the upper mold 11 and the lower mold 12. First, the upper mold 11 that forms this cavity
A plasticizer is added to a non-foamed vinyl chloride resin by coating or spraying on the lower surface of the mold 12 and the surface of the recess 12a of the lower mold 12 to form a sol-like paste. Next, the vinyl chloride paste 31 is sufficiently stirred using an Oakes type mixer to bubble air, and then injected into the cavity through an injection port formed in either the upper mold 11 or the lower mold 12 (Fig. 2). ). After this, the mold was heated to 120℃~200℃.
℃ to gel and solidify the vinyl chloride pastes 21 and 31 (Fig. 3), and then cooled and taken out from the mold (
Figure 4).
これにより、きわめて高発泡倍率の塩化ビニル３よりな
る内層と非発泡の塩化ビニル２よりなる表皮層で構成さ
れた二層成形体が得られる。As a result, a two-layer molded product is obtained, which includes an inner layer made of vinyl chloride 3 with an extremely high expansion ratio and a skin layer made of non-foamed vinyl chloride 2.
なお、塩化ビニルペースト３１は空気を泡入するかわり
に発泡剤を加え、金型の加熱により発泡させても良い。Note that, instead of introducing air into the vinyl chloride paste 31, a foaming agent may be added to the vinyl chloride paste 31, and the foam may be foamed by heating the mold.
本発明の方法によれば、上記内層をなす塩化ビニルの発
泡倍率は５〜２０倍とすることができ、きわめて軽量な
成形体を得ることかできる。According to the method of the present invention, the expansion ratio of the vinyl chloride constituting the inner layer can be set to 5 to 20 times, and an extremely lightweight molded article can be obtained.
また、表皮層は金型により正確に所定の形状に保たれ、
型に形成したストライプや文字を転写せしめることによ
り意匠性に優れた複雑な形状とすることができる。In addition, the epidermal layer is held in a precise shape by a mold,
By transferring the stripes and letters formed on the mold, it is possible to create complex shapes with excellent design.
なお、粒状塩化ビニル樹脂に加える可塑剤の量を調節す
ることにより成形体は硬質のものから軟質のものまで可
能である。By adjusting the amount of plasticizer added to the granular vinyl chloride resin, the molded product can be made from hard to soft.
以上の如く、本発明の製造方法によれば、きわめて発泡
倍率の高い内層と正確に所定の形状を保った非発泡の表
皮層よりなる塩化ビニル成形体を製造することができ、
車両のプロテクションモール等の製造に利用して大きな
効果を発揮するものである。As described above, according to the production method of the present invention, it is possible to produce a vinyl chloride molded article consisting of an inner layer with an extremely high expansion ratio and a non-foamed skin layer that maintains a precisely predetermined shape.
It is highly effective when used in the manufacture of vehicle protection moldings, etc.
第１図ないし第４図は本発明の一実施例を示す説明図で
ある。
１１、１２…型
２…非発泡塩化ビニル
２１…非発泡塩化ビニルペースト
３…発泡塩化ビニル
３１…泡入塩化ビニルペース■1 to 4 are explanatory diagrams showing one embodiment of the present invention. 11, 12... Mold 2... Non-foamed vinyl chloride 21... Non-foamed vinyl chloride paste 3... Foamed vinyl chloride 31... Foamed vinyl chloride paste ■
Claims (1)
の塩化ビニルペースト層を形成した後、型内にあらかじ
め気体を泡入せしめた塩化ビニルペーストまたは発泡剤
を含んだ塩化ビニルペーストを注入し、型を加熱して上
記非発泡塩化ビニルペーストを固化せしめるとともに注
入した塩化ビニルペーストを固化ないし、発泡固化せし
めることを特徴とする発泡塩化ビニルの内層と非発泡塩
化ビニルの表皮層よりなる塩化ビニル成形体の製造方法
。After forming a layer of foamed vinyl chloride paste to a predetermined thickness by coating or spraying on the inner surface of the mold, the vinyl chloride paste with gas bubbled in advance or the vinyl chloride paste containing a foaming agent is injected into the mold. A vinyl chloride molded article comprising an inner layer of foamed vinyl chloride and a skin layer of non-foamed vinyl chloride, characterized in that the non-foamed vinyl chloride paste is solidified by heating, and the injected vinyl chloride paste is solidified or foamed and solidified. manufacturing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58076373A JPS59201831A (en) | 1983-04-29 | 1983-04-29 | Preparation of vinyl chloride molded article |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58076373A JPS59201831A (en) | 1983-04-29 | 1983-04-29 | Preparation of vinyl chloride molded article |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59201831A true JPS59201831A (en) | 1984-11-15 |
Family
ID=13603536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58076373A Pending JPS59201831A (en) | 1983-04-29 | 1983-04-29 | Preparation of vinyl chloride molded article |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59201831A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5031194A (en) * | 1973-06-21 | 1975-03-27 | ||
| JPS5231394A (en) * | 1975-09-03 | 1977-03-09 | Sumitomo Electric Ind Ltd | Production method of water-proof type cable |
| JPS5276151A (en) * | 1975-12-22 | 1977-06-27 | Koshin Gomu Kk | Method for manufacturing shoes |
| JPS5373265A (en) * | 1976-12-11 | 1978-06-29 | Otsuka Kagaku Yakuhin | Production of high foamed composite article |
-
1983
- 1983-04-29 JP JP58076373A patent/JPS59201831A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5031194A (en) * | 1973-06-21 | 1975-03-27 | ||
| JPS5231394A (en) * | 1975-09-03 | 1977-03-09 | Sumitomo Electric Ind Ltd | Production method of water-proof type cable |
| JPS5276151A (en) * | 1975-12-22 | 1977-06-27 | Koshin Gomu Kk | Method for manufacturing shoes |
| JPS5373265A (en) * | 1976-12-11 | 1978-06-29 | Otsuka Kagaku Yakuhin | Production of high foamed composite article |
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