CN104999622A - Thermoplastic resin thick walled casting product mold system - Google Patents
Thermoplastic resin thick walled casting product mold system Download PDFInfo
- Publication number
- CN104999622A CN104999622A CN201510367799.2A CN201510367799A CN104999622A CN 104999622 A CN104999622 A CN 104999622A CN 201510367799 A CN201510367799 A CN 201510367799A CN 104999622 A CN104999622 A CN 104999622A
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- CN
- China
- Prior art keywords
- thermoplastic resin
- mold system
- mold
- heavy section
- section casting
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Classifications
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- 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
- B29C45/26—Moulds
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- 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
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/56—Means for plasticising or homogenising the moulding material or forcing it into the mould using mould parts movable during or after injection, e.g. injection-compression moulding
- B29C45/561—Injection-compression moulding
-
- 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
- B29C45/72—Heating or cooling
- B29C45/73—Heating or cooling of the mould
-
- 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
- B29C45/78—Measuring, controlling or regulating of temperature
-
- 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
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/56—Means for plasticising or homogenising the moulding material or forcing it into the mould using mould parts movable during or after injection, e.g. injection-compression moulding
- B29C45/561—Injection-compression moulding
- B29C2045/564—Compression drive means acting independently from the mould closing and clamping means
-
- 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
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76494—Controlled parameter
- B29C2945/76531—Temperature
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention relates to a thermoplastic resin thick walled casting product mold system. The system comprises a mold unit and a temperature change unit connected to the mold unit. The mold unit comprises a fixed mold plate (1) and a movable mold plate (2) matching with the fixed mold plate (1). The temperature change unit comprises a heating pipe (1), an air pump (12) and pipes connected to the mold unit. The temperature change unit controls a temperature of the mold unit. Compared with the existing mold system, the thermoplastic resin thick walled casting product mold system can process a thick walled casting product and low flow resin, has concentrated stress, does not influence mold clamping force, does not easily produce flash, and is provided with a cold slug well so that weld mark is reduced furthest and the whole molding period of the thick walled casting product is shortened.
Description
Technical field
The present invention relates to compression molding field, especially relate to a kind of thermoplastic resin heavy section casting goods mold system.
Background technology
Injection compression molding (injection compression moulding/icm) is the shaping a kind of advanced form of traditional injection moulding.It can increase the ratio of the streamer length/wall thickness of injection-moulded plastic part; Adopt less clamp force and injection pressure; Reduce material internal stress; And raising processing throughput.Injection compression molding is applicable to the product that various engineering thermoplastic's plastic cement makes, as: large-sized curved surface part, thin-walled, microminiaturized part, optical mirror slip, and the part having good anti-attack characteristic requirements.
Inject compress is widely used in the thin-wall part goods such as light guide plate in recent years, less at heavy section casting product application, in addition heavy section casting goods easily produce shrink phenomenon, the shrink problem (surperficial puncture and internal shrinkage) of working of plastics, be all because volume thicker position cooling time melten gel supplement deficiency and the defect that causes.In any case we usually can run into intensified pressure, strengthen water inlet, extend inject time, shrink problem is exactly insurmountable situation.In addition for heavy section casting goods particularly low stir-in resin easily under high speed and high pressure, produce the problems such as thermal degradation, the adjustment at present in mould is less.Patent CN101218084B discloses a kind of after molding shot compression forming product, can keep the die for injection compression molding of the position of injection compression molding product in molding space portion, this mould structure is complicated, and is integral mold plate compression, preliminary mold clamping force can not be too large, easily causes overlap.Patent CN101274478B disclose a kind of can by change module and respectively transfer printing to be well shaped the ejection compress moulding mould of light guide plate of different light guide plates and the ejection compress moulding method of light guide plate, this mould is light guide plate forming mould, more excellent to the resin applicability of high fluidity, but to heavy section casting goods and be easy to decompose low stir-in resin applicability lower.Patent 201210499386.6 is openly known clearly a kind of injection mold, comprise front mould core rod, coordinate with front mould core rod with the rear mold core rod forming die cavity and the ejecting mechanism coordinated with rear mold core rod, ejecting mechanism comprises push rod, rear mold core rod is provided with the first groove, push rod to embed in described first groove and coordinates with front mould core rod and formed into watering runner, enter to water runner have be formed in die cavity inside portion enter cast gate, but the resin excellent effect that this mould is less to shrinkage factor, but shrink problem is easily produced to the flowing resin of poor-performing and heavy section casting goods.
Summary of the invention
Object of the present invention is exactly provide a kind of mold clamping force not affecting mould to overcome defect that above-mentioned prior art exists, not easily produces overlap, reduces the thermoplastic resin heavy section casting goods mold system of weld mark.
Object of the present invention can be achieved through the following technical solutions:
A kind of thermoplastic resin heavy section casting goods mold system, the thermal swing units comprising die unit and be connected with die unit,
Described die unit is made up of the solid plate mutually mated and moving platen,
The pipeline that described thermal swing units is connected with die unit by heating tube, air pump is formed, and controls the temperature of die unit.
Described solid plate comprises the spring supporting block be arranged on the contact surface place of moving platen, the cooling-water duct of the high pressure spring of linking springs back-up block and the pipeline connection with thermal swing units, and described spring supporting block is through solenoid-operated switch controlled motion.
Described cooling-water duct is distributed on around high pressure spring.
Described high pressure spring is provided with 8 altogether, amounts to the pressure that can bear 25MPa.
Described moving platen comprise corresponding with spring supporting block arrange compressible template, control the hydraulic means that compressible template moves, the thermostatted water passage offered around die, the pipeline connection of this thermostatted water passage and thermal swing units, these external die cavity wall both sides offer slag well, for farthest reducing the weld mark that cold burden causes.
The pipeline of described thermal swing units connects heating tube, air pump, and is formed with die unit and circulate, and inlet pipeline and water return pipeline are equipped with hot water electromagnetic valve.
Described inlet pipeline connects into the mouth of a river, and connecting pipe is provided with cooling electric magnet valve.
Described water return pipeline connects discharge outlet, and connecting pipe arranges the thermostatic electromagnetic valve that controlled by PID and the by-pass line with cooling electric magnet valve.
The import being arranged on the hot water electromagnetic valve on inlet channel is connected with the bypass connecting pipe road with bypass solenoid valve with the exit of the hot water electromagnetic valve be arranged on water return pipeline.
Utilize this mold injection molding, forming action divides and carries out as multistep, and compression procedure is controlled by injection machine signal.The action in a mold of shaping order is first matched moulds, after matched moulds, injection machine carries out injection moulding, after injection moulding completes, hydraulic means promotes the advance of compressible template, solenoid-operated switch is opened and spring supporting block can be retreated simultaneously, realize compression, in compression process, because die cavity advances, the cold burden in slag well is separated, then enters cooling stage, cooling stage thermostatted water is closed, and cooling-water duct opens the cooling realizing goods.
Compared with prior art, the present invention can process heavy section casting goods and lazy flow resin, and its feature is die cavity compression and non-template compresses, and stress is concentrated, and compression power comes from mould self hydraulic means, does not affect the mold clamping force of mould, not easily produces overlap; Its deuterzooid mould offers slag well, for the release of melt foreword thermal degradation cold burden; This mould farthest decreases weld mark by change mould temperature system again, realize the shortening of the whole molding cycle of heavy section casting goods, in addition this mold cavity relative position is variable, can realize the automatic separation of cold burden, utilizes high pressure spring automatic reset to realize automatic demoulding.
Accompanying drawing explanation
Fig. 1 is the structural representation of die unit;
Fig. 2 is the structural representation of thermal swing units.
In figure, 1-solid plate, 2-moving platen, 3-thermostatted water passage, 4-cooling-water duct, the compressible template of 5-, 6-hydraulic means, 7-solenoid-operated switch, 8-spring supporting block, 9-high pressure spring, 10-slag well, 11-heating tube, 12-air pump, 13-1# hot water electromagnetic valve, 14-2# hot water electromagnetic valve, 15-3# bypass solenoid valve, 16-4# cooling electric magnet valve, 17-5# cooling electric magnet valve, 18-thermostatic electromagnetic valve.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment
A kind of thermoplastic resin heavy section casting goods mold system, the thermal swing units comprising die unit and be connected with die unit, its structure respectively as shown in Figure 1, 2.Die unit is made up of the solid plate 1 mutually mated and moving platen 2, and the pipeline that thermal swing units is connected with die unit by heating tube 11, air pump 12 is formed, and controls the temperature of die unit.
Next two unit are described further: solid plate 1 comprises the spring supporting block 8 be arranged on the contact surface place of moving platen 2, the high pressure spring 9 of linking springs back-up block 8 and the cooling-water duct 4 with the pipeline connection of thermal swing units, spring supporting block 8 is through solenoid-operated switch 7 controlled motion.Wherein, high pressure spring 9 is provided with 8 altogether, and amount to the pressure that can bear 25MPa, cooling-water duct 4 is distributed on around high pressure spring 9.
Moving platen 2 comprise corresponding with spring supporting block 8 arrange compressible template 5, control the hydraulic means 6 that compressible template 5 moves, the thermostatted water passage 3 offered around die, the pipeline connection of this thermostatted water passage 3 and thermal swing units, these external die cavity wall both sides offer slag well 10, for farthest reducing the weld mark that cold burden causes.
The pipeline of thermal swing units connects heating tube 11, air pump 12, and is formed with die unit and circulate, and inlet pipeline and water return pipeline are respectively equipped with 2# hot water electromagnetic valve 14 and 1# hot water electromagnetic valve 13.Inlet pipeline connects into the mouth of a river, and connecting pipe is provided with 4# cooling electric magnet valve 16.Water return pipeline connects discharge outlet, and connecting pipe arranges the thermostatic electromagnetic valve 18 that controlled by PID and the by-pass line with 5# cooling electric magnet valve 17.The import of 2# hot water electromagnetic valve 14 and the exit of 1# hot water electromagnetic valve 13 are connected with the bypass connecting pipe road with 3# bypass solenoid valve 15.
Utilize this mold injection molding, forming action divides and carries out as multistep, and compression procedure is controlled by injection machine signal.The action in a mold of shaping order is first matched moulds, after matched moulds, injection machine carries out injection moulding, after injection moulding completes, hydraulic means 6 promotes compressible template 5 and advances, solenoid-operated switch 7 is opened and spring supporting block 8 can be retreated simultaneously, realize compression, in compression process, because die cavity advances, the cold burden in slag well is separated, then enters cooling stage, cooling stage thermostatted water passage 3 is closed, and cooling-water duct 4 opens the cooling realizing goods.
Become mould temperature system main 1# hot water electromagnetic valve 13,2# hot water electromagnetic valve 14 (often opening), 3# bypass solenoid valve 15 (normally closed), 4# cooling electric magnet valve 16,5# cooling electric magnet valve 17 (normally closed), thermostatic electromagnetic valve 18; The magnetic valve become in mould temperature system supplies signal by injection machine work and controls.Constant-temperature hot water: the signal according to process requirements inputs, control common chilled water system turnover pipeline on a magnetic valve and constant-temperature hot water system in bypass solenoid valve all close, open the magnetic valve on constant-temperature hot water system turnover pipeline simultaneously, now the external main line of connecting mold is constant-temperature hot water circulation, cooling electric magnet valve is according to the detection of temperature-sensing probe to temperature, computerized control system opens or closes automatically, thus reaches the effect of water termostat.Common cold water: the signal according to process requirements inputs, control the closed electromagnetic valve on constant-temperature hot water system turnover pipeline, open the magnetic valve on common chilled water system turnover pipeline simultaneously, and bypass solenoid valve in constant-temperature hot water system, to ensure the inner normal decompression cycle of water pump and temperature required constant, now the external main line of connecting mold is common circulating chilled water.Cooling electric magnet valve still can according to the temperature detection of temperature-sensing probe to constant temperature system, and computerized control system opens or closes automatically.
The hydraulic means signaling interface that mould carries is that injection machine melten gel switches, die sinking output signal, and hydraulic pressure is 50MPa.Electromagnetic switch signal controls identical with hydraulic means, and injection machine melten gel switches, die sinking output signal.Constant-temperature hot water, cooling water control signal are that injection machine melten gel switches, die sinking output signal.
This molded target is the rectangular block of shaping length 100mm, thickness 8mm, first injection machine matched moulds, and mold clamping force is 150MPa, now hydraulic means is closed condition, and electromagnetic switch is closed, and now recirculated water is constant-temperature hot water, temperature is 90 DEG C, and now die cavity thickness is 9.5mm.
After matched moulds completes, injection machine starts injection moulding, and injection pressure is 40MPa, enters packing stage after injection moulding completes, and the dwell time is 30s.
Melten gel signal switching after pressurize completes, hydraulic means is opened, cooling water switch is opened, electromagnetic switch is opened simultaneously, and compressive plate advances under the promotion of hydraulic means, hydraulic pressure is 50MPa, spring-support plate retreats, product wall thickness boil down to 8mm, whole cooling procedure 30s.
Cool rear die sinking, now hydraulic means recovers, cooling water is closed, constant-temperature hot water is opened, spring-support plate ejects, electromagnetic switch is closed, realize the demoulding of slag well waste material, moulded products, after the demoulding completes, goods are collected, and shapingly complete the forming process entering next batch simultaneously.
Native system is mainly towards heavy section casting goods and lazy flow resin, and its feature is die cavity compression and non-template compresses, and stress is concentrated, and compression power comes from mould self hydraulic means, does not affect the mold clamping force of mould, not easily produces overlap; Its deuterzooid mould offers slag well, for the release of melt foreword thermal degradation cold burden; This mould farthest decreases weld mark by change mould temperature system again, realize the shortening of the whole molding cycle of heavy section casting goods, in addition this mold cavity relative position is variable, can realize the automatic separation of cold burden, utilizes high pressure spring automatic reset to realize automatic demoulding.
Claims (9)
1. a thermoplastic resin heavy section casting goods mold system, is characterized in that, the thermal swing units that this mold system comprises die unit and is connected with die unit,
Described die unit is made up of the solid plate mutually mated (1) and moving platen (2),
The pipeline that described thermal swing units is connected with die unit by heating tube (11), air pump (12) is formed, and controls the temperature of die unit.
2. a kind of thermoplastic resin heavy section casting goods mold system according to claim 1, it is characterized in that, described solid plate (1) comprises the spring supporting block (8) be arranged on the contact surface place of moving platen (2), the cooling-water duct (4) of the high pressure spring (9) of linking springs back-up block (8) and the pipeline connection with thermal swing units, described spring supporting block (8) is through solenoid-operated switch (7) controlled motion.
3. a kind of thermoplastic resin heavy section casting goods mold system according to claim 2, is characterized in that, described cooling-water duct (4) is distributed on high pressure spring (9) around.
4. a kind of thermoplastic resin heavy section casting goods mold system according to claim 2, it is characterized in that, described high pressure spring (9) is provided with 8 altogether, amounts to the pressure that can bear 25MPa.
5. a kind of thermoplastic resin heavy section casting goods mold system according to claim 2, it is characterized in that, described moving platen (2) comprise corresponding with spring supporting block (8) arrange compressible template (5), control the hydraulic means (6) that compressible template (5) moves, the thermostatted water passage (3) offered around die, this thermostatted water passage (3) and the pipeline connection of thermal swing units, offer slag well (10) in die cavity wall both sides.
6. a kind of thermoplastic resin heavy section casting goods mold system according to claim 1, it is characterized in that, the pipeline of described thermal swing units connects heating tube (11), air pump (12), and is formed with die unit and circulate, and inlet pipeline and water return pipeline are equipped with hot water electromagnetic valve.
7. a kind of thermoplastic resin heavy section casting goods mold system according to claim 6, it is characterized in that, described inlet pipeline connects into the mouth of a river, and connecting pipe is provided with cooling electric magnet valve.
8. a kind of thermoplastic resin heavy section casting goods mold system according to claim 6, is characterized in that, described water return pipeline connects discharge outlet, and connecting pipe arranges the thermostatic electromagnetic valve that controlled by PID and the by-pass line with cooling electric magnet valve.
9. a kind of thermoplastic resin heavy section casting goods mold system according to claim 6, it is characterized in that, the import being arranged on the hot water electromagnetic valve on inlet channel is connected with the bypass connecting pipe road with bypass solenoid valve with the exit of the hot water electromagnetic valve be arranged on water return pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510367799.2A CN104999622B (en) | 2015-06-29 | 2015-06-29 | A kind of thermoplastic resin heavy section casting product mold system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510367799.2A CN104999622B (en) | 2015-06-29 | 2015-06-29 | A kind of thermoplastic resin heavy section casting product mold system |
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| CN104999622A true CN104999622A (en) | 2015-10-28 |
| CN104999622B CN104999622B (en) | 2017-06-13 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110406022A (en) * | 2018-04-27 | 2019-11-05 | 扬明光学股份有限公司 | Ejection shaping die and the device for injection moulding and Optical element manufacturing method for using it |
| CN112045942A (en) * | 2020-07-07 | 2020-12-08 | 黄家军 | Easy-to-release injection mold with buffering effect |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02139211A (en) * | 1988-11-21 | 1990-05-29 | Nishikawa Kasei Kk | Method of molding rim product having recessed and projected pattern |
| US6500376B1 (en) * | 2000-01-27 | 2002-12-31 | Visteon Global Technologies, Inc. | Multiple injection compression molding process |
| CN1727169A (en) * | 2004-06-09 | 2006-02-01 | 株式会社日本制钢所 | Shaping method of thick light guiding plate and its mould |
| CN101293393A (en) * | 2007-04-28 | 2008-10-29 | 株式会社名机制作所 | Light guide plate forming mold and light guide plate forming method |
| CN103707477A (en) * | 2014-01-07 | 2014-04-09 | 晟扬精密模具（昆山）有限公司 | Injection mold |
-
2015
- 2015-06-29 CN CN201510367799.2A patent/CN104999622B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02139211A (en) * | 1988-11-21 | 1990-05-29 | Nishikawa Kasei Kk | Method of molding rim product having recessed and projected pattern |
| US6500376B1 (en) * | 2000-01-27 | 2002-12-31 | Visteon Global Technologies, Inc. | Multiple injection compression molding process |
| CN1727169A (en) * | 2004-06-09 | 2006-02-01 | 株式会社日本制钢所 | Shaping method of thick light guiding plate and its mould |
| CN101293393A (en) * | 2007-04-28 | 2008-10-29 | 株式会社名机制作所 | Light guide plate forming mold and light guide plate forming method |
| CN103707477A (en) * | 2014-01-07 | 2014-04-09 | 晟扬精密模具（昆山）有限公司 | Injection mold |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110406022A (en) * | 2018-04-27 | 2019-11-05 | 扬明光学股份有限公司 | Ejection shaping die and the device for injection moulding and Optical element manufacturing method for using it |
| CN112045942A (en) * | 2020-07-07 | 2020-12-08 | 黄家军 | Easy-to-release injection mold with buffering effect |
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| Publication number | Publication date |
|---|---|
| CN104999622B (en) | 2017-06-13 |
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