JPH04197613A - Structure of mold - Google Patents
Structure of moldInfo
- Publication number
- JPH04197613A JPH04197613A JP33180490A JP33180490A JPH04197613A JP H04197613 A JPH04197613 A JP H04197613A JP 33180490 A JP33180490 A JP 33180490A JP 33180490 A JP33180490 A JP 33180490A JP H04197613 A JPH04197613 A JP H04197613A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- glass plate
- contact surface
- insert body
- contact
- 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
- 239000011521 glass Substances 0.000 claims abstract description 41
- 238000001746 injection moulding Methods 0.000 claims abstract description 9
- 239000000919 ceramic Substances 0.000 claims abstract description 7
- 239000006082 mold release agent Substances 0.000 claims abstract description 4
- 239000003973 paint Substances 0.000 claims description 16
- 230000002093 peripheral effect Effects 0.000 claims description 11
- 238000004381 surface treatment Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 abstract description 8
- 238000005238 degreasing Methods 0.000 abstract description 2
- 239000011248 coating agent Substances 0.000 abstract 3
- 238000000576 coating method Methods 0.000 abstract 3
- 238000005336 cracking Methods 0.000 description 6
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000005357 flat glass Substances 0.000 description 4
- 239000004593 Epoxy Substances 0.000 description 3
- 229920003002 synthetic resin Polymers 0.000 description 3
- 239000000057 synthetic resin Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14336—Coating a portion of the article, e.g. the edge of the article
- B29C45/14434—Coating brittle material, e.g. glass
-
- 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
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14336—Coating a portion of the article, e.g. the edge of the article
- B29C45/14418—Sealing means between mould and article
Abstract
Description
この発明は、ガラス板またはセラミック板がインサート
され、該インサート体の周縁部にシール部材または装飾
部材を射出成形する、一対の割型からなる金型構造に関
する。The present invention relates to a mold structure comprising a pair of split molds into which a glass plate or a ceramic plate is inserted and a sealing member or a decorative member is injection molded onto the peripheral edge of the insert.
ガラス板１の周縁部にシール部材２が配設された自動車
用りオータウインドガラス（第２図参照）を製造するに
当たっては、一般に、シール部材２形状に対応するキャ
ビティを形成する金型の下型４に、予め成形された通常
僅かに湾曲したガラス板ｌをインサート体としてセット
し、以後、型締め、射出成形、型開き、離型、仕上げを
順に行なうことで、ガラス板１の周縁部にシール部材２
を形成、配設するようにしている。In manufacturing an automobile auto window glass (see Fig. 2) in which a sealing member 2 is disposed on the peripheral edge of a glass plate 1, a mold is generally placed under a mold that forms a cavity corresponding to the shape of the sealing member 2. A pre-formed glass plate l, which is usually slightly curved, is set as an insert in the mold 4, and then mold clamping, injection molding, mold opening, mold release, and finishing are performed in order to form the peripheral edge of the glass plate 1. Seal member 2
I try to form and arrange them.
しかし、シール部材が、第２図に示すように、ガラス板
１の表面側では幅広部２ａを形成し、−刃裏面側では幅
狭部２ｂを形成しているというように、ガラス板１を挟
んで幅狭部２ｂと幅広部２ａとを有するようなシール部
材２である場合、その射出成形時にガラス割れが発生す
ることがあり、生産性の向上が阻害されていた。
そこで、本出願人がガラス割れの原因を調査したところ
、幅狭部２ｂの外形形状に対応するキャビティ面５が形
成されている一方の割型（上型）３には、このキャビテ
ィ面５の内側縁からガラス板１中心部側に向かって伸び
、ガラス板１と本来的には完全面接触されるへき、第１
の接触面６が形成されているが、この第１の接触面６と
ガラス板１とが線接触しかしていない場合にガラス割れ
が生じることが判明し、さらに、非接触部位における両
者間の隙間ｒが僅かなもの（Ｏ６１〜０．０５ ｍｍ）
であっても、射出成形時に、ガラス板１の接触部位Ｐに
射出圧に基づく応力集中が生じ、この応力集中により、
ガラス割れが生じることを突き止めた（第４図参照）。
この発明は、上記調査結果に基つき、上記のようなガラ
ス板をインサート体とする製品は勿論のこと、他に、セ
ラミック板をインサート体とする同様な製品を製造する
際においても上記と同様の問題が生ずるであろうことに
鑑み、射出成形時にガラス割れまたはセラミック割れが
生じないような金型構造を提供することを課題とする。However, as shown in FIG. 2, the sealing member forms a wide part 2a on the front side of the glass plate 1 and a narrow part 2b on the back side of the blade. In the case of a sealing member 2 having a narrow portion 2b and a wide portion 2a sandwiched therebetween, glass cracking may occur during injection molding, thereby hindering improvement in productivity. Therefore, when the present applicant investigated the cause of the glass cracking, it was found that one of the split molds (upper mold) 3, on which the cavity surface 5 corresponding to the external shape of the narrow part 2b is formed, has a cavity surface 5 formed therein. A first section extends from the inner edge toward the center of the glass plate 1 and is originally in complete surface contact with the glass plate 1.
However, it has been found that glass cracking occurs when the first contact surface 6 and the glass plate 1 are in only line contact, and furthermore, the gap between the two at the non-contact area is Small r (O61~0.05 mm)
However, during injection molding, stress concentration occurs at the contact area P of the glass plate 1 due to the injection pressure, and this stress concentration causes
It was found that glass cracking occurred (see Figure 4). Based on the above research results, this invention is based on the above-mentioned research results, and the present invention is based on the above-mentioned research results. In view of the problems that may occur, it is an object of the present invention to provide a mold structure that does not cause glass or ceramic cracks during injection molding.
上記課題を解決するため、この発明による金型構造は、
ガラス板またはセラミック板からなる平板状インサート
体の周縁部に、該インサート体を挟んて幅狭部と幅広部
とを有する周縁部材を射出成形するための一対の割型か
らなり、一方の割型には、前記幅狭部の外形形状に対応
するキャビティ面が形成されているとともに、該キャビ
ティ面の内側縁から前記インサート体中心部側に向かっ
て伸び、前記インサート体と本来的には完全面接触され
るべき第１の接触面が形成されている金型構造において
、
前記一方の割型の前記第１の接触面に肉盛部が形成され
ており、
該肉盛部は、
前記一方の割型の前記第１の接触面に、表面処理後、硬
化型塗料を塗布するとともに、前記第１の接触面と本来
的には面接触されるへき前記インサート体の第２の接触
面に、離型剤を塗布し、前記インサート体を金型にセッ
トし、型締めした状態で前記硬化型塗料を硬化させ、
型開きし、離型後、前記硬化した硬化型塗料に対し仕上
げをして形成されてなる、
ことを特徴とする。In order to solve the above problems, the mold structure according to the present invention includes the following: A peripheral member having a narrow part and a wide part is injected onto the peripheral part of a flat insert made of a glass plate or a ceramic plate, with the insert being sandwiched therebetween. It consists of a pair of split molds for molding, and one split mold is formed with a cavity surface corresponding to the external shape of the narrow portion, and a cavity surface that extends from the inner edge of the cavity surface toward the center of the insert body. In the mold structure, a first contact surface is formed that extends toward the insert body and should originally be in complete surface contact with the insert body, and a built-up portion is formed on the first contact surface of the one split mold. is formed, and the built-up portion is formed by applying a hardening paint to the first contact surface of the one split mold after surface treatment, and by applying a hardening paint to the first contact surface, which is originally a surface of the first contact surface. A mold release agent is applied to the second contact surface of the insert body to be contacted, the insert body is set in a mold, the hardening type paint is cured with the mold clamped, and the mold is opened and released. It is characterized in that it is formed by applying a finish to the hardened curable paint after molding.
この発明によると、射出成形時には、肉盛部がインサー
ト体と完全に面接触しており、この接触面全体で射出圧
を受は止めることになることがら、インサート体に応力
集中が発生せず、ガラス割れおよびセラミック割れを防
止できる。According to this invention, during injection molding, the built-up part is in complete surface contact with the insert body, and this entire contact surface receives no injection pressure, so no stress concentration occurs on the insert body. , can prevent glass cracking and ceramic cracking.
以下、この発明の一実施例を第１〜３図にもとついて説
明する。
この実施例は、ガラス板１の周縁部にシール部材（周縁
部材）２が配設された自動車用クォータウィンドガラス
（第２図参照）を製造するための金型構造である。ここ
で、ガラス板１は多少湾曲した無機ガラスであり、イン
サート体を構成する。また、シール部材２は、ガラス板
１の表面側では幅広部２ａを形成し、−刃裏面側では幅
狭部２ｂを形成しているというように、ガラス板１を挟
んで幅狭部２ｂと幅広部２ａとを有する合成樹脂材料（
例えば、塩化ビニル樹脂）からなるものである。
この金型構造は、一対の割型（上型３、下型４）からな
る。
上型３には、幅狭部２ｂの外形形状に対応するキャビテ
ィ面５が形成されている。また、上型３には、キャビテ
ィ面５の内側縁からガラス板１中心部側に向かって伸び
、ガラス板１と本来的には完全面接触されるべき第１の
接触面６が形成されている。
第１の接触面６には、肉盛部７が形成されている。この
肉盛部７は、次のような処理■〜■を順に経て形成され
る。
■上型３の第１の接触面６に、表面処理（脱脂等）を施
す。
■次に、第１の接触面６に硬化型塗料を塗布する。また
、ガラス板１において、上型３の第１の接触面６と本来
的には面接触されるへき第２の接触面８に、離型剤を塗
布する。
■次に、ガラス板１を下型４にセットする。
■次に、上型３を型締めし、硬化型塗料を硬化させる。
■硬化後、型開きし、離型する。
０次に、硬化した硬化型塗料に対し仕上げ（キャビティ
内への突出部分９の削除等）をする。
ここで、硬化型塗料としては、エポキシ系パテが特に望
ましい。このエポキシ系パテを使用した場合、肉盛部７
の硬度は、シヨアＤ硬度で７０以上が望ましい。
このようにして肉盛部７が形成された金型構造を用いて
自動車用クォータウィンドガラスを製造する方法は、従
来からの製造方法と同様であるため、その説明は省略す
る。ただし、射出成形時においては、肉盛部７とガラス
板１とは完全面接触しており、射出圧は肉盛部７の接触
面１０全体で受は止められ、ガラス板１に応力集中が発
生するようなことは、はとんどない（第１図参照）、な
お、エポキシ系パテを硬化型塗料として使用した場合、
ガラス不良率は、従来約５％であったのが、約１％に向
上した。
以上説明したように、上記実施例の金型構造によると、
射出成形時には、肉盛部７がガラス板１と完全に面接触
しており、この接触面１０全体で射出圧を受は止めるこ
とになることから、ガラス板１に応力集中が発生せず、
ガラス割れを防止できる。
なお、この発明は上記実施例に限定されるものではなく
、他に、ガラス板１の代わりにセラミック板が使用され
る製品を製造するための金型構造としても適用できる。
また、周縁部材として、他に装飾部材であってもよい。
また、硬化型塗料として、他にポリエステル系塗料てあ
ってもよい。
なお、特開昭５７−１１１１１号公報には、耐熱合成樹
脂２１ （第６図参照）が記載されているが、この耐熱
合成樹脂２１は単に緩衝作用を果たすことで窓材１７の
破損を防止するためのものであり、本発明の肉盛部とは
基本的に相違するものである。An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. This embodiment is a mold structure for manufacturing a quarter window glass for an automobile (see FIG. 2) in which a seal member (peripheral member) 2 is disposed on the peripheral edge of a glass plate 1. Here, the glass plate 1 is a somewhat curved inorganic glass and constitutes an insert body. The sealing member 2 also has a narrow portion 2b with the glass plate 1 in between, such that a wide portion 2a is formed on the front side of the glass plate 1, and a narrow portion 2b is formed on the back side of the blade. A synthetic resin material having a wide portion 2a (
For example, it is made of vinyl chloride resin). This mold structure consists of a pair of split molds (upper mold 3, lower mold 4). The upper die 3 has a cavity surface 5 formed therein that corresponds to the outer shape of the narrow portion 2b. Further, the upper mold 3 is formed with a first contact surface 6 that extends from the inner edge of the cavity surface 5 toward the center of the glass plate 1 and that should originally be in complete surface contact with the glass plate 1. There is. A build-up portion 7 is formed on the first contact surface 6 . The built-up portion 7 is formed by sequentially performing the following processes (1) to (2). (2) Surface treatment (degreasing, etc.) is applied to the first contact surface 6 of the upper die 3. (2) Next, apply a curable paint to the first contact surface 6. Further, in the glass plate 1, a mold release agent is applied to the second contact surface 8 which is originally in surface contact with the first contact surface 6 of the upper mold 3. ■Next, set the glass plate 1 on the lower mold 4. ■Next, the upper mold 3 is clamped and the curable paint is cured. ■After curing, open the mold and release it. Next, the cured curable paint is finished (e.g., the protruding portion 9 into the cavity is removed). Here, as the curable paint, epoxy putty is particularly desirable. When using this epoxy putty, the overlay part 7
The hardness is desirably 70 or more in Shore D hardness. The method of manufacturing a quarter window glass for an automobile using the mold structure in which the built-up portion 7 is formed in this manner is the same as the conventional manufacturing method, and therefore the explanation thereof will be omitted. However, during injection molding, the build-up part 7 and the glass plate 1 are in complete surface contact, and the injection pressure is stopped by the entire contact surface 10 of the build-up part 7, causing stress concentration on the glass plate 1. It is extremely unlikely that this will occur (see Figure 1). However, if epoxy putty is used as a hardening paint,
The glass defect rate has improved from about 5% to about 1%. As explained above, according to the mold structure of the above embodiment,
During injection molding, the built-up part 7 is in complete surface contact with the glass plate 1, and this entire contact surface 10 stops receiving injection pressure, so no stress concentration occurs on the glass plate 1.
Prevents glass from breaking. Note that the present invention is not limited to the above-mentioned embodiments, and can also be applied to a mold structure for manufacturing a product in which a ceramic plate is used instead of the glass plate 1. Further, the peripheral member may also be a decorative member. In addition, other polyester paints may be used as the curable paint. Note that JP-A-57-11111 describes a heat-resistant synthetic resin 21 (see Figure 6), but this heat-resistant synthetic resin 21 prevents damage to the window material 17 by simply acting as a buffer. This is basically different from the built-up part of the present invention.
第１図は、一実施例の金型構造の使用状態を示す断面図
、
第２図は、同金型構造を使用して製造される自動車用ク
ォータウィンドガラスの断面図、第３図は、同金型構造
の肉盛部の形成方法を示す断面図、
第４図は、従来の金型構造の使用状態を示す断面図であ
る。
１・・・ガラス板（インサート体）、
２・・・シール部材（周縁部材）、
２ａ・・・幅広部、
２ｂ・・・幅狭部、
３・・・上型（一方の割型）、
５・・・キャビティ面、
６・・・第１の接触面、
７・・・肉盛部、
８・・・第２の接触面。
特 許 出 願 人
豊田合成株式会社
第 １ 図
１ ２ｂ
２ どｄ
第 ３ ■
第 ４ 図FIG. 1 is a cross-sectional view showing how the mold structure of one embodiment is used, FIG. 2 is a cross-sectional view of an automobile quarter window glass manufactured using the same mold structure, and FIG. FIG. 4 is a cross-sectional view showing a method of forming a built-up part of the same mold structure. FIG. 4 is a cross-sectional view showing a conventional mold structure in use. DESCRIPTION OF SYMBOLS 1...Glass plate (insert body), 2...Sealing member (peripheral member), 2a...Wide part, 2b...Narrow width part, 3...Upper mold (one split mold), 5... Cavity surface, 6... First contact surface, 7... Built-up portion, 8... Second contact surface. Patent application Toyoda Gosei Co., Ltd. Figure 1 2b 2d 3 ■ Figure 4
Claims (1)
体の周縁部に、該インサート体を挟んで幅狭部と幅広部
とを有する周縁部材を射出成形するための一対の割型か
らなり、一方の割型には、前記幅狭部の外形形状に対応
するキャビティ面が形成されているとともに、該キャビ
ティ面の内側縁から前記インサート体中心部側に向かっ
て伸び、前記インサート体と本来的には完全面接触され
るべき第１の接触面が形成されている金型構造において
、 前記一方の割型の前記第１の接触面に肉盛部が形成され
ており、 該肉盛部は、 前記一方の割型の前記第１の接触面に、表面処理後、硬
化型塗料を塗布するとともに、前記第１の接触面と本来
的には面接触されるべき前記インサート体の第２の接触
面に、離型剤を塗布し、前記インサート体を金型にセッ
トし、型締めした状態で前記硬化型塗料を硬化させ、 型開きし、離型後、前記硬化した硬化型塗料に対し仕上
げをして形成されてなる、 ことを特徴とする金型構造。[Claims] A pair of split molds for injection molding a peripheral edge member having a narrow portion and a wide portion with the insert body sandwiched between the peripheral edge portion of a flat insert body made of a glass plate or a ceramic plate. One split mold is formed with a cavity surface corresponding to the external shape of the narrow portion, and extends from the inner edge of the cavity surface toward the center of the insert body, and is connected to the insert body. In a mold structure in which a first contact surface that should originally be in complete surface contact is formed, a built-up part is formed on the first contact surface of the one split mold, and the built-up part is formed on the first contact surface of the one split mold. The section includes applying a hardening paint to the first contact surface of the one split mold after surface treatment, and applying a hardening paint to the first contact surface of the one split mold, and applying a hardening paint to the first contact surface of the insert body that should originally be in surface contact with the first contact surface. Apply a mold release agent to the contact surface of No. 2, set the insert body in a mold, and cure the curable paint while the mold is clamped. Open the mold, and after releasing the mold, remove the cured curable paint. A mold structure characterized by being formed by finishing the mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33180490A JPH04197613A (en) | 1990-11-28 | 1990-11-28 | Structure of mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33180490A JPH04197613A (en) | 1990-11-28 | 1990-11-28 | Structure of mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04197613A true JPH04197613A (en) | 1992-07-17 |
Family
ID=18247828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33180490A Pending JPH04197613A (en) | 1990-11-28 | 1990-11-28 | Structure of mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04197613A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017190860A1 (en) * | 2016-05-03 | 2017-11-09 | Volkswagen Aktiengesellschaft | Method and device for back-molding a curved glass body |
-
1990
- 1990-11-28 JP JP33180490A patent/JPH04197613A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017190860A1 (en) * | 2016-05-03 | 2017-11-09 | Volkswagen Aktiengesellschaft | Method and device for back-molding a curved glass body |
| CN109070415A (en) * | 2016-05-03 | 2018-12-21 | 大众汽车有限公司 | The method and apparatus of rear spraying for curved glass body |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2003076169A3 (en) | Injection molded body having self-cleaning properties, and method for producing injection molded bodies of this type | |
| JPH04197613A (en) | Structure of mold | |
| JPS6395913A (en) | Manufacture of display and decorative member for automobile | |
| JPH02107416A (en) | Molding method for composite article | |
| JPS6031931A (en) | Molding method of resin part | |
| JPH06293043A (en) | Processing of appearance member having base part composed of synthetic resin material | |
| JPH041011A (en) | Manufacture of resin molding | |
| US5922260A (en) | Method of making die set for forming ceramic tiles | |
| US213784A (en) | Improvement in inlaying metallic scroll-ornaments in hard rubber and allied gums | |
| JP2784673B2 (en) | Edge material forming device for some side surfaces of plate material | |
| JP2002086482A (en) | Method for providing seal member to surface of base material | |
| US5714177A (en) | Die set for forming ceramic tiles | |
| JP2898309B2 (en) | Concrete production method | |
| JPS61283515A (en) | Manufacture of sheet integral with trimmed member | |
| JPH02160520A (en) | Integral molding method of window | |
| JP2925564B2 (en) | Double molding method and double molding die | |
| JP2005199641A (en) | In-mold coating molding method, and mold for in-mold coating molding | |
| JP2001047470A (en) | Injection molding method of plastic product | |
| JPS57151627A (en) | Coating of molded article of resin | |
| JPH0732016Y2 (en) | Mold | |
| JPS6129503A (en) | Formwork for placing concrete | |
| JPS63172620A (en) | Structure of polydicyclopentadiene reaction injection mold | |
| JPH0324340Y2 (en) | ||
| JPS6327220A (en) | Manufacutre of decorative panel | |
| JPS5978832A (en) | Manufacture of molding for automobile |