SU835796A1 - Method of automatic control of cooling time at pressure-moulding of plastics - Google Patents
Method of automatic control of cooling time at pressure-moulding of plastics Download PDFInfo
- Publication number
- SU835796A1 SU835796A1 SU792809631A SU2809631A SU835796A1 SU 835796 A1 SU835796 A1 SU 835796A1 SU 792809631 A SU792809631 A SU 792809631A SU 2809631 A SU2809631 A SU 2809631A SU 835796 A1 SU835796 A1 SU 835796A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- plastics
- cooling
- cooling time
- moulding
- automatic control
- 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
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/76—Measuring, controlling or regulating
Description
1one
Изобретение относитс к способам автоматического управлени процессами переработки пластмасс и может быть использовано при изготовлении изделий из пластмасс методом лить под давлением.The invention relates to methods for the automatic control of plastics processing processes and can be used in the manufacture of plastic products by injection molding.
Известен способ автоматического управлени временем охлаждени изделий при литье пластмасс под давлением, заключающийс в прекращении операции охлаждени издели при полном смыкании полуформ 1.A known method of automatically controlling the cooling time of products during the molding of plastics under pressure, which consists in stopping the operation of cooling the product when the half-molds 1 are fully closed.
Известный способ обладает ограниченными возможност ми в отнощении повышени производительности процесса из-за скорости отверждени дра издели и периферийных его слоев, что приводит к смыканию полуформ до того, как заканчиваетс охлаждение издели .The known method has limited possibilities in terms of increasing the productivity of the process due to the speed of curing the core of the product and its peripheral layers, which leads to the closure of the half-form before the cooling of the product ends.
Цель изобретени - повышение производительности процесса.The purpose of the invention is to increase the productivity of the process.
Указанна цель достигаетс тем, что по известному способу автоматического управлени временем охлаждени изделий при литье пластмасс под давлением, заключающемус в прекращении операции охлаждени издели при полном смыкании полуформ , прекращают операцию охлаждени издели при полном смыкании полуформ и достижении величинами температур охлаждающей форму жидкости на входе и выходе из формы равных значений.This goal is achieved by the fact that, according to a known method of automatically controlling the cooling time of products during plastic molding, consisting in stopping the product cooling operation when the half-molds are fully closed, the product cooling operation is stopped when the half-molds complete and the inlet and outlet cooling temperatures are reached. from the form of equal values.
На чертеже показана блок-схема устройства , осуществл ющего описываемый способ .The drawing shows a block diagram of a device implementing the described method.
В процессе охлаждени изделие 1 остывает в полости, образованной полуформами 2 и 3. Датчик 4 контролирует величину зазора между полуформами 2 и 3 и вырабатывает сигнал, пропорциональный величине зазора. Этот сигнал поступает на вход ключа 5, на выходе которого при наличии зазора между полуформами 2 и 3 вырабатываетс сигнал логического нул , а приDuring the cooling process, the product 1 cools down in the cavity formed by half-molds 2 and 3. Sensor 4 monitors the gap between half-molds 2 and 3 and produces a signal proportional to the gap. This signal is fed to the input of the key 5, the output of which in the presence of a gap between the half-molds 2 and 3 produces a signal of logical zero, and when
полном контакте полуформ 2 и 3 вырабатываетс управл ющий сигнал логической единицы.the full contact of half-molds 2 and 3 produces a control signal of a logical unit.
Охлаждающа жидкость подаетс в форму по магистрали а, а сливаетс из формыCoolant is supplied to the mold via line a and drained from the mold.
по магистрали б. Датчик 6 температуры контролирует температуру л идкости в магистрали а, а датчик 7 - в магистрали б. Сигналы с датчиков 6 и 7, пропорциональные контролируемым температурам, поступают на входы блока 8 сравнени , на выходе которого вырабатываетс сигнал, пропорциональный величине разности между величинами сигналов на входе блока 8. Выход блока 8 сравнени электрически св занon highway b. Temperature sensor 6 monitors the temperature of the liquid in line a, and sensor 7 controls the line b. The signals from sensors 6 and 7, proportional to the controlled temperatures, are fed to the inputs of the comparison unit 8, the output of which produces a signal proportional to the difference between the values of the signals at the input of the block 8. The output of the comparison unit 8 is electrically connected
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU792809631A SU835796A1 (en) | 1979-08-17 | 1979-08-17 | Method of automatic control of cooling time at pressure-moulding of plastics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU792809631A SU835796A1 (en) | 1979-08-17 | 1979-08-17 | Method of automatic control of cooling time at pressure-moulding of plastics |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU835796A1 true SU835796A1 (en) | 1981-06-07 |
Family
ID=20846288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU792809631A SU835796A1 (en) | 1979-08-17 | 1979-08-17 | Method of automatic control of cooling time at pressure-moulding of plastics |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU835796A1 (en) |
-
1979
- 1979-08-17 SU SU792809631A patent/SU835796A1/en active
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