SU581850A3 - Method of injection moulding of articles - Google Patents
Method of injection moulding of articlesInfo
- Publication number
- SU581850A3 SU581850A3 SU7301945265A SU1945265A SU581850A3 SU 581850 A3 SU581850 A3 SU 581850A3 SU 7301945265 A SU7301945265 A SU 7301945265A SU 1945265 A SU1945265 A SU 1945265A SU 581850 A3 SU581850 A3 SU 581850A3
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- composition
- mold
- curing
- molded article
- injection
- Prior art date
Links
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
-
- 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
- B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Description
.- 1 . ..- one . .
Известен способ инжекционного формовани изделий из составов на основе термореактивной смолы, например фенолоформальдегидной , заключающийс в том что пресс-материал в в зко-пластичном состо нии впрыскивают под давлением в закрытую нагретую матрицу, в которой изделие отверждают под давлением впрыскивани 1.A known method of injection molding products from compositions based on a thermosetting resin, for example, phenol-formaldehyde, means that the press material in a visco-plastic state is injected under pressure into a closed heated matrix, in which the product is cured under the injection pressure 1.
Однако длительность отверждени издели в пресс-форме значительно сокращает производительность прессового оборудовани .However, the curing time of the product in the mold significantly reduces the productivity of the pressing equipment.
Цель изобретени - повышение производительности оборудовани .The purpose of the invention is to increase the productivity of the equipment.
Дл этого согласно предлагаемому способу композицию, состо щую из феиолоформальдегидной смолы и наполнител , впрыскивают в форму с температурой, не превышающей температуры начала ее отверждени , после чего отформованное изделие извлекают из формы с последующим отверждением его при нагревании вне формы.To do this, according to the proposed method, a composition consisting of a feiol-formaldehyde resin and a filler is injected into a mold at a temperature not exceeding the temperature at which it begins to cure, after which the molded product is removed from the mold and then cured when heated outside the mold.
По данному способу можно перерабатывать составы, содержащие 50-80% по объему инертного наполнител .In this method, it is possible to recycle formulations containing 50-80% by volume of an inert filler.
Температура, при которой состав впрыскиваетс в форму, может измен тьс в широких пределах в зависимости от типа смолы, процентного содержани и типа наполнител , а также от формы издели .The temperature at which the composition is injected into the mold can vary widely, depending on the type of resin, the percentage and type of filler, as well as the shape of the product.
Аналогичным образом может измен тьс и температура матрицы (температура охлаждени ). Так, например, было установлено, что состав, обладающий жесткостью при комнатной температуре, становитс достаточно пластичным при 80° С и при охлаждении его в матрице примерно до 50° С спрессованное изделне вл етс достаточно жестким и сохран ет свою форму после удалени из матрицы, а также в процессе отверждени . Если же состав не вл етс жестким при температуре окружающей среды , то может потребоватьс охлаждение матрицы до температуры, ннже комнатной.In a similar way, the temperature of the matrix (cooling temperature) can also vary. Thus, for example, it was found that a composition that has rigidity at room temperature becomes sufficiently plastic at 80 ° C and when cooled in the matrix to about 50 ° C, the compacted part is sufficiently rigid and retains its shape after removal from the matrix, and during the curing process. If the composition is not rigid at ambient temperature, then the matrix may be cooled to a temperature lower than room temperature.
Данный способ позвол ет сократить врем цикла работы машины ныжекцнонного прессовани , т. е. повысить производительность оборудовани . Кроме этого, по вл етс возможность повторного использовани пресс-матернала (в случае брака), так как материал в пресс-форме не отверждаетс . При осуществлении данного способа материал ие затекает ниже линии разъема охлажденной матрицы, в результате чего издели получаютс чистыми и отпадает необходимость в удалении обло . И, наконец, при расчете размеров матрицы нетThis method makes it possible to shorten the cycle time of an in-line pressing machine, i.e., to increase the productivity of the equipment. In addition, it becomes possible to reuse the press material (in case of rejects), since the material in the mold is not cured. When implementing this method, the material does not flow below the chilled matrix connector line, with the result that the products are clean and there is no need to remove flash. And finally, when calculating the dimensions of the matrix is not
необходимости принимать во внимание усадку издели .need to take into account the shrinkage of the product.
Пример. Дл прессовани изделий по предлагаемому способу, берут состав на основе формальдегидной смолы, содержащий следующие компоненты, вес. %:Example. For pressing the products according to the proposed method, a composition based on formaldehyde resin is taken, containing the following components, wt. %:
ФенолофоЛ}мальдегидиа смола 25 Асбестовое волокно50Phenolofol} Maldegidia Resin 25 Asbestos Fiber50
Порошкообразный неорганический наполнитель25Powdered inorganic filler25
Прессование осуществл ют на подложке из металлической пластины, имеющей заклинивающие образовани . Пластину с нанесенным на нее слоем смолы помещают в матрицу инжекционного прессовани , крторую затем герметически закрывают и выпрыскивают в нее пресс-материал под давлением 1260 кгс/см при 80°С. Оптимальные результаты достигаютс при охлаждении матрицы со стороны, удаленной от впрыскивающего сопла, и при условии поддержани давлени впрыскивани в процессе охлаждени .The pressing is carried out on a metal plate substrate having wedged formations. A plate coated with a layer of resin is placed in an injection molding matrix, the second is then hermetically sealed, and a press material is injected into it under a pressure of 1260 kgf / cm at 80 ° C. Optimum results are achieved when the die is cooled on the side remote from the injection nozzle and under the condition that the injection pressure is maintained during the cooling process.
Во всех случа х отверждение можно проводить в печи как при отсутствии внешнего давлени , так и при воздействии очень небольшого давлени , менее 1,4 кгс/см.In all cases, the curing can be carried out in a furnace both in the absence of external pressure and when exposed to a very small pressure, less than 1.4 kgf / cm.
Claims (2)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3192472A GB1431434A (en) | 1972-07-07 | 1972-07-07 | Moulding of thermosetting materials |
Publications (1)
Publication Number | Publication Date |
---|---|
SU581850A3 true SU581850A3 (en) | 1977-11-25 |
Family
ID=10330425
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU7301945265A SU581850A3 (en) | 1972-07-07 | 1973-07-06 | Method of injection moulding of articles |
Country Status (24)
Country | Link |
---|---|
JP (1) | JPS4953250A (en) |
AR (1) | AR200875A1 (en) |
BE (1) | BE802040A (en) |
BR (1) | BR7304966D0 (en) |
CA (1) | CA1028112A (en) |
CH (1) | CH576339A5 (en) |
CS (1) | CS194163B2 (en) |
DE (1) | DE2334464A1 (en) |
ES (1) | ES416703A1 (en) |
FR (1) | FR2191989B1 (en) |
GB (1) | GB1431434A (en) |
HU (1) | HU169448B (en) |
IE (1) | IE37891B1 (en) |
IN (1) | IN140873B (en) |
IT (1) | IT989721B (en) |
KE (1) | KE2844A (en) |
LU (1) | LU67957A1 (en) |
MY (1) | MY7800320A (en) |
NL (1) | NL7309487A (en) |
PH (1) | PH10398A (en) |
PL (1) | PL91620B1 (en) |
SU (1) | SU581850A3 (en) |
TR (1) | TR17597A (en) |
ZA (1) | ZA734388B (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB8328898D0 (en) * | 1983-10-28 | 1983-11-30 | Blue Circle Ind Plc | Articles of plastic |
WO1996020075A1 (en) * | 1994-12-23 | 1996-07-04 | Amoco Corporation | Improved process for making preforms useful for encapsulating semiconductors |
CN115551819A (en) * | 2020-05-15 | 2022-12-30 | 电化株式会社 | Composite and method for producing composite |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE529902C (en) * | 1930-04-11 | 1931-07-18 | Hermann Buchholz | Process for the production of molded articles |
ES362831A1 (en) * | 1968-01-23 | 1970-11-16 | Inku Aussen Und Binnenhandelsg | Procedure for the manufacture of bodies with form. (Machine-translation by Google Translate, not legally binding) |
-
1972
- 1972-07-07 GB GB3192472A patent/GB1431434A/en not_active Expired
-
1973
- 1973-06-27 ZA ZA734388A patent/ZA734388B/en unknown
- 1973-06-29 AR AR248855A patent/AR200875A1/en active
- 1973-07-03 IT IT51204/73A patent/IT989721B/en active
- 1973-07-04 BR BR4966/73A patent/BR7304966D0/en unknown
- 1973-07-04 IN IN1556/CAL/1973A patent/IN140873B/en unknown
- 1973-07-05 TR TR17597A patent/TR17597A/en unknown
- 1973-07-05 CA CA175,699A patent/CA1028112A/en not_active Expired
- 1973-07-06 DE DE19732334464 patent/DE2334464A1/en active Pending
- 1973-07-06 BE BE133229A patent/BE802040A/en unknown
- 1973-07-06 LU LU67957A patent/LU67957A1/xx unknown
- 1973-07-06 JP JP48076499A patent/JPS4953250A/ja active Pending
- 1973-07-06 HU HUBI474A patent/HU169448B/hu unknown
- 1973-07-06 CH CH989373A patent/CH576339A5/xx not_active IP Right Cessation
- 1973-07-06 SU SU7301945265A patent/SU581850A3/en active
- 1973-07-06 FR FR7324963A patent/FR2191989B1/fr not_active Expired
- 1973-07-06 NL NL7309487A patent/NL7309487A/xx not_active Application Discontinuation
- 1973-07-07 PH PH14801A patent/PH10398A/en unknown
- 1973-07-07 ES ES416703A patent/ES416703A1/en not_active Expired
- 1973-07-07 PL PL1973163898A patent/PL91620B1/pl unknown
- 1973-07-09 CS CS734939A patent/CS194163B2/en unknown
- 1973-07-09 IE IE1152/73A patent/IE37891B1/en unknown
-
1978
- 1978-06-13 KE KE2844A patent/KE2844A/en unknown
- 1978-12-31 MY MY1978320A patent/MY7800320A/en unknown
Also Published As
Publication number | Publication date |
---|---|
BR7304966D0 (en) | 1974-09-05 |
AU5767273A (en) | 1975-01-09 |
CA1028112A (en) | 1978-03-21 |
IE37891B1 (en) | 1977-11-09 |
BE802040A (en) | 1974-01-07 |
ZA734388B (en) | 1974-05-29 |
KE2844A (en) | 1978-06-30 |
TR17597A (en) | 1975-07-23 |
CH576339A5 (en) | 1976-06-15 |
FR2191989B1 (en) | 1977-02-18 |
FR2191989A1 (en) | 1974-02-08 |
HU169448B (en) | 1976-11-28 |
IN140873B (en) | 1977-01-01 |
MY7800320A (en) | 1978-12-31 |
PH10398A (en) | 1977-03-07 |
GB1431434A (en) | 1976-04-07 |
NL7309487A (en) | 1974-01-09 |
CS194163B2 (en) | 1979-11-30 |
IT989721B (en) | 1975-06-10 |
JPS4953250A (en) | 1974-05-23 |
ES416703A1 (en) | 1976-02-01 |
DE2334464A1 (en) | 1974-01-24 |
LU67957A1 (en) | 1973-09-26 |
PL91620B1 (en) | 1977-03-31 |
IE37891L (en) | 1974-01-07 |
AR200875A1 (en) | 1974-12-27 |
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