SU1227488A1 - Method of moulding articles from sheet polymethyl methacrylate - Google Patents
Method of moulding articles from sheet polymethyl methacrylate Download PDFInfo
- Publication number
- SU1227488A1 SU1227488A1 SU853851455A SU3851455A SU1227488A1 SU 1227488 A1 SU1227488 A1 SU 1227488A1 SU 853851455 A SU853851455 A SU 853851455A SU 3851455 A SU3851455 A SU 3851455A SU 1227488 A1 SU1227488 A1 SU 1227488A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- sheet
- polymethyl methacrylate
- glass transition
- temperature
- transition temperature
- Prior art date
Links
Landscapes
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Description
Изобретение относитс к технологи переработки термопластов, а именно к способам формовани криволинейных изделий из листового полиметилмеТак- рилата.The invention relates to a process for the processing of thermoplastics, and specifically to methods for forming curvilinear products from polymethylmethylacrylate sheet.
Цель изобретени - упрощение способа и повышение производительности.The purpose of the invention is to simplify the method and increase productivity.
Пример 1, Заготовку из 1IMMA марки СО-120 (температура стекловани - Т 120 С5 предел прочностиExample 1, Procurement of 1IMMA grade CO-120 (glass transition temperature - T 120 C5 tensile strength
на разрыв л-зto break lz
6 75 МПа) толщиной6 75 MPa) thick
б 10 м раст гивают до нагрузки 20 МП что составл ет 27% от предела прочности . Затем нагревают одну поверхность до 18б°С (на 60°С выше Т.) в течение 5 с. За это врем заготовка нагреваетс выше температуры стекловани на глубину 0,24 толщины листа. Затем нагрев прекращают и после охлаждени раст гивающую нагрузку снимают . Освобожденна из зажимов) за го- товка самопроизвольно изгибаетс с радиусом 15,29 м. Врем формовани составл ет 305 с. При формовании такого же издели известным способом (обт жкой пуансона) врем формовани составл ет 2260 с. При выдержке .отПри выдержке отформованных изде- 50 чае примераВ,поскольку толщина зоны, ЛИЙ в ацетоне в течение 5 мин раст- прогретой вышетe mepaтypы стекловани рескивание происходит только в слу- больше половины толщины листа.b 10 m stretch to a load of 20 MP which is 27% of the tensile strength. Then heat one surface to 18b ° C (60 ° C above T.) for 5 s. During this time, the preform is heated above the glass transition temperature to a depth of 0.24 sheet thickness. Then the heating is stopped and, after cooling, the tensile load is removed. Freed from the clamps) during the preparation is spontaneously bent with a radius of 15.29 m. The molding time is 305 s. When the same product is molded in a known manner (by a narrow punch), the molding time is 2260 s. With aging. From aging with molded articles of example B, since the zone thickness, LIH in acetone is exhausted for 5 minutes, then glass transitions occur only in more than half of the sheet thickness.
ВНИИПИ Заказ 2252/19 Тираж 640 Подписное Произв.-полигр, пр-тие, г. Ужгород ул. Проектна , 4VNIIPI Order 2252/19 Circulation 640 Subscription Proizv.-poly, pr-tie, Uzhgorod ul. Project, 4
формованного издели в ацетоне в течение 5 мин растрескивани не происходит .the molded article in acetone does not crack for 5 minutes.
Пример 2. Заготовка из ПММА марки СО-95 (температура стекловани - Tj. 95°С, предел прочности на раз- рыв б 65 МПа) отформованаExample 2. A billet of PMMA grade SO-95 (glass transition temperature - Tj. 95 ° C, tensile strength of b 65 MPa) was molded
0 предлагаемым способом в той же последовательности ,, что и в примере 1 со следующими технологическими режимами. Нагрузка при раст жении 54 МПа (80% от предела прочности). Температура0 by the proposed method in the same sequence, as in example 1 with the following technological modes. 54 MPa tensile load (80% of tensile strength). Temperature
5 нагрева 165 С (на 60°С выше температуры стекловани ). Глубина зоны нагретой выше Т 0,24 толщины листа. Радиус изгиба листа 0,45 м. Врем формовани такое же, что и в приме0 ре 1. При выдержке издели в ацетоне в течение 5 мин растрескивани не происходит.5 heating 165 ° C (60 ° C above the glass transition temperature). The depth of the zone heated above T 0.24 sheet thickness. The sheet bend radius is 0.45 m. The molding time is the same as in Example 1. When the product is held in acetone for 5 minutes, no cracking occurs.
Примеры 3-9. Издели формуют так же, как в примере 1, ноExamples 3-9. Products molded in the same way as in example 1, but
5 раст гивающую нагрузку и температуру нагрева одной поверхности варьируют в пределах, указанных в таблице .5, the tensile load and the heating temperature of one surface vary within the limits indicated in the table.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU853851455A SU1227488A1 (en) | 1985-02-05 | 1985-02-05 | Method of moulding articles from sheet polymethyl methacrylate |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU853851455A SU1227488A1 (en) | 1985-02-05 | 1985-02-05 | Method of moulding articles from sheet polymethyl methacrylate |
Publications (1)
Publication Number | Publication Date |
---|---|
SU1227488A1 true SU1227488A1 (en) | 1986-04-30 |
Family
ID=21161339
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU853851455A SU1227488A1 (en) | 1985-02-05 | 1985-02-05 | Method of moulding articles from sheet polymethyl methacrylate |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU1227488A1 (en) |
-
1985
- 1985-02-05 SU SU853851455A patent/SU1227488A1/en active
Non-Patent Citations (1)
Title |
---|
Авторское свидетельство СССР № 827306, кл. В 28 С 17/04, 1979. Гудимов М.М., Перов Б.В. Органическое стекло. М.: Хими , 1981, с. 148. * |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3496143A (en) | Process for sheet forming polyethylene terephthalate | |
US2397471A (en) | Method of producing strain-free thermoplastic articles | |
TW369423B (en) | Metal glass made product and its production method | |
ATE242104T1 (en) | METHOD FOR PRODUCING A THERMOPLASTIC PRODUCT WITH HIGH CREEP RESISTANCE | |
DE3863943D1 (en) | METHOD FOR PRODUCING THERMOPLASTIC, POLYMERIC PROFILES BY PULTRUSION, DEVICE AND PRODUCED ITEMS. | |
SE7609660L (en) | WAY TO PRODUCE FOREMALS OF TRANSPARENT PLASTIC | |
ATE23705T1 (en) | POROSIZED, ESPECIALLY REFRACTORY, CERAMIC PRODUCT AND PROCESS FOR ITS PRODUCTION. | |
SU1227488A1 (en) | Method of moulding articles from sheet polymethyl methacrylate | |
DE3060247D1 (en) | Process for the preparation of n-vinyl-n-alkyl carboxylic acid amides | |
DE3667258D1 (en) | METHOD FOR PRODUCING MOLDED PLASTIC ELEMENTS AND DEVICE FOR IMPLEMENTING THE METHOD. | |
IL88586A0 (en) | Aluminium alloy parts,in particular rods,having an improved fatigue strength and their production | |
ATE161247T1 (en) | METHOD FOR PRODUCING A CATALYST SUPPORT FROM SHARED SUBSTANCES | |
HUP9904272A2 (en) | Process and device for making movable units of a plastic component | |
GB2074931B (en) | Recoverable articles | |
SU1556808A1 (en) | Method of producing hollow articles | |
JP3615618B2 (en) | Product manufacturing composition and product manufacturing method | |
JPS60176732A (en) | Method of working end of odd-shaped extrusion molding | |
SU1404475A1 (en) | Method of bending sheet glass | |
JPS58171916A (en) | Manufacture of releasable bi-axially oriented polypropylene film | |
SU836026A1 (en) | Method of modifying polymethylmethacrylate articles | |
SU952640A1 (en) | Method of processing waste of high-molecular polyethylene | |
FR2355648A1 (en) | PROCESS FOR THE MANUFACTURING OF RUBBER-BASED OBJECTS AND MEANS FOR ITS IMPLEMENTATION | |
SU580927A1 (en) | Method of manufacturing hollow articles | |
EP0130348A3 (en) | Process for producing edible foamed articles, particularly chocolate articles, and apparatus for carrying out this process | |
SU952635A1 (en) | Method of polishing through openings in thermoplastic materials |