CN103991204A - Mold pressing LFT-D molding method for glass fiber reinforced PC - Google Patents
Mold pressing LFT-D molding method for glass fiber reinforced PC Download PDFInfo
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- CN103991204A CN103991204A CN201410229721.XA CN201410229721A CN103991204A CN 103991204 A CN103991204 A CN 103991204A CN 201410229721 A CN201410229721 A CN 201410229721A CN 103991204 A CN103991204 A CN 103991204A
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- Prior art keywords
- screw extruder
- glass
- mold pressing
- lft
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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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/80—Component parts, details or accessories; Auxiliary operations
- B29B7/88—Adding charges, i.e. additives
- B29B7/90—Fillers or reinforcements, e.g. fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/58—Component parts, details or accessories; Auxiliary operations
- B29B7/72—Measuring, controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
- B29B7/7461—Combinations of dissimilar mixers
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
- B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
- B29B7/40—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
- B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
- B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention provides a mold pressing LFT-D molding method for glass fiber reinforced PC. The mold pressing LFT-D molding method comprises the following steps: carrying out air blowing and drying treatment on a PC material, putting into a stirrer, quantifying by a vector-type weighing system, and fusing and plastifying in a first-order dual-screw extruder; meanwhile, conveying glass fibers by a glass fiber automatic feeding and conveying system to a second-order dual-screw extruder, metering and cutting off the glass fibers by a metering and cut-off device in the conveying device, wherein the lengths of the glass fibers after being cut off are 24-25mm; blending, fusing and plastifying the plastified PC which accounts for 60%-80% of the total weight and the glass fibers which account for 20%-40% of the total weight, and extruding out; and finally, quantitatively cutting off raw materials extruded by the second-order screw extruder, keeping the temperature, and conveying to a press for mold pressing and sizing, thereby obtaining the product finally. The method provided by the invention can improve the toughness and rigidity of the product, and can effectively improve the surface quality of the product, and the production cycle can be reduced.
Description
Technical field
The present invention relates to a kind of mold pressing glass fiber reinforced PC LFT-D forming method.
Background technology
Because PC is amorphous material, in the cooling procedure of producing in injection moulding, interior molecules chain movement is in disturbance state, simultaneously because the mobility of glass fiber reinforced PC material is extremely low, the surface compatability deficiency of PC material and glass, caused the glass of material internal not distribute equably, thereby caused the mechanical property of material on the low side, glass easily appears surface at product in one's mind, occurs so-called glass line, very seriously affected the surface aesthetic degree of product goods.At present, for the Main Means that solves this floating fine problem, be both at home and abroad, with glass fiber reinforced PC/PBT alloy, replace glass fiber reinforced PC material, but this can reduce the mechanical property of goods, and strengthen fiber reinforced PC material substitution glass fiber reinforced PC material with ore deposit fibre, as used silicon wafer palpus, greatly reduce toughness, the heat resistance of material, rigidity is not had to obvious castering action yet.Or obtain good appearance property by changing the formula of material, and this need to introduce multi-component additive, and complex process, and glass belongs to chopped strand, although improved to a certain extent surface quality, but can reduce the combination property of goods.
Summary of the invention
The technical problem to be solved in the present invention, is to provide a kind of mold pressing glass fiber reinforced PC LFT-D forming method, can improve toughness and the rigidity of goods, also can effectively improve the surface quality of goods, can also reduce the production cycle.
The present invention is achieved in that a kind of mold pressing glass fiber reinforced PC LFT-D forming method, comprising:
Step 10, PC material is put into after forced air drying is processed to mixer and after vector expression weighing system, entered the melting of single order double screw extruder and plasticate, the speed setting of single order screw extruder is 140-200rpm/min, single order screw extruder is divided into continuous a plurality of meltings district that plasticates, and each melting district's temperature of plasticating is 220-260 ℃;
Meanwhile, glass is delivered to second order double screw extruder by glass frame, and by metering shearing device, glass metering is cut off in the process of carrying, the length after glass cuts off is 24-25mm; Described metering shearing device running speed is 30-60 (r/min), and glass transporting velocity depends on metering shearing device running speed;
Step 20, the PC that accounts for gross mass 70% through plasticating and the glass that accounts for gross mass 30% are mixed and melting is extruded after plasticating at second order double screw extruder, described second order screw extruder is provided with a plurality of meltings that are mixed district that plasticates, the plasticate temperature in district of the melting that is respectively mixed is 200-280 ℃, and the rotating speed of described second order screw extruder is 100-300rpm/min;
After step 30, the raw material that described second order screw extruder is extruded carry out quantitatively cutting off, insulation is transported to press and carries out mold pressing sizing and finally obtain goods; Requirement molding pressure is 500-2000T, and upper and lower mould temperature is 20-70 ℃, and the dwell time is 40-180s.
Further, in described step 30, described material piece is transported to feeding displacement place via the insulation of insulation conveyer belt, then puts into press by manipulator gripping.
Further, the design temperature of described insulation conveyer belt is 120-160 ℃, and insulation conveyer belt rotating speed is 100～170rpm/min.
Further, the described melting district's number of plasticating is 8, described in the plasticate number in district of melting that is mixed be 6.
Tool of the present invention has the following advantages: be mainly to adopt LFT-D mould pressing process to produce glass fiber reinforced PC goods, this technique is mainly toughness and the rigidity that roving glass fiber enhancing can improve goods, simultaneously the surface quality that can effectively improve goods that coordinates with second order twin-screw by single order.In addition, this technique, can reduce the production cycle effectively and without prepreg step without the interpolation of other auxiliary agents.
Accompanying drawing explanation
The present invention is further illustrated in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is the inventive method flowchart.
The specific embodiment
As shown in Figure 1, mold pressing glass fiber reinforced PC LFT-D forming method of the present invention, comprising:
Step 10, PC material is put into after forced air drying is processed to mixer and after vector expression weighing system, entered the melting of single order double screw extruder and plasticate, the speed setting of single order screw extruder is 140-200rpm/min, single order screw extruder is divided into continuous a plurality of meltings district that plasticates, and each melting district's temperature of plasticating is 220-260 ℃; The plasticate number in district of described melting is better while being 8;
Simultaneously, glass is delivered to second order dual-screw-stem machine by glass frame, and by metering shearing device, glass is cut off in the process of carrying, described metering shearing device running speed is 30-60 (r/min), glass transporting velocity depends on metering shearing device running speed.Described glass metering shearing device can adopt Fujian Haiyuan Automation Machinery Co's application the glass cutter sweep that prevents the axial migration of glass in disclosed China's invention on August 14th, 2013 " preventing glass cutting method and the device of the axial migration of glass " (201310162027.6), or the continuous fiber fixed-length cutting device of the application of Wei You Fujian Haiyuan Automation Machinery Co the continuous accurate measurement in disclosed utility model patent on January 8th, 2012 " the continuous fiber fixed-length cutting device of accurate measurement continuously " (201120100231.1).
Step 20, the PC that accounts for gross mass 70% through plasticating and the glass that accounts for gross mass 30% are mixed and melting is extruded after plasticating at second order double screw extruder, described second order screw extruder is provided with a plurality of meltings that are mixed district that plasticates, the plasticate temperature in district of the melting that is respectively mixed is 200-280 ℃, and the rotating speed of described second order screw extruder is 100-300rpm/min; The plasticate number in district of the described melting that is mixed is better while being 6.
After step 30, the material piece that described second order screw extruder is extruded carry out quantitatively cutting off, insulation is transported to press and carries out mold pressing sizing and finally obtain goods; Requirement molding pressure is 500-2000T, and upper and lower mould temperature is 20-70 ℃, and the dwell time is 40-180s.Wherein, described material piece can be transported to feeding displacement place via the insulation of insulation conveyer belt, then puts into press by manipulator gripping, and the design temperature of described insulation conveyer belt is 120-160 ℃, and insulation conveyer belt rotating speed is 100～170rpm/min.
According to above-mentioned steps 10, to step 30, provide 3 embodiment of the present invention, and by following table, distinguish the parameter of several embodiment:
Pass through above-described embodiment, the surface quality that can find out goods is higher, also found through experiments, hot strength and bending strength also effectively improve, therefore roving glass fiber strengthens toughness and the rigidity that can improve goods, in addition, this technique, can reduce the production cycle effectively and without prepreg step without the interpolation of other auxiliary agents.
Although more than described the specific embodiment of the present invention; but being familiar with those skilled in the art is to be understood that; our described specific embodiment is illustrative; rather than for the restriction to scope of the present invention; those of ordinary skill in the art are in equivalent modification and the variation done according to spirit of the present invention, all should be encompassed in the scope that claim of the present invention protects.
Claims (4)
1. a mold pressing glass fiber reinforced PC LFT-D forming method, is characterized in that: comprise
Step 10, PC material is put into after forced air drying is processed to mixer and through vector expression weighing system, entered the melting of single order double screw extruder after quantitatively and plasticate, the speed setting of single order screw extruder is 140-200rpm/min, single order screw extruder is divided into continuous a plurality of meltings district that plasticates, and each melting district's temperature of plasticating is 220-260 ℃;
Meanwhile, glass is delivered to second order dual-screw-stem machine by glass frame, and by metering shearing device, glass metering is cut off in the process of carrying, the length after glass cuts off is 24-25mm; Described metering shearing device running speed is 30-60 (r/min), and glass transporting velocity depends on metering shearing device running speed;
Step 20, the PC that accounts for gross mass 60%-80% through plasticating and the glass that accounts for gross mass 20%-40% are mixed and melting is extruded after plasticating at second order double screw extruder, described second order screw extruder is provided with a plurality of meltings that are mixed district that plasticates, the plasticate temperature in district of the melting that is respectively mixed is 200-280 ℃, and the rotating speed of described second order screw extruder is 100-300rpm/min;
After step 30, the material piece that described second order screw extruder is extruded carry out quantitatively cutting off, insulation is transported to press and carries out mold pressing sizing and finally obtain goods; Requirement molding pressure is 500-2000T, and upper and lower mould temperature is 20-70 ℃, and the dwell time is 40-180s.
2. mold pressing glass fiber reinforced PC LFT-D forming method according to claim 1, is characterized in that: in described step 30, described material piece is transported to feeding displacement place via the insulation of insulation conveyer belt, then puts into press by manipulator gripping.
3. mold pressing glass fiber reinforced PC LFT-D forming method according to claim 2, is characterized in that: the design temperature of described insulation conveyer belt is 120-160 ℃, and insulation conveyer belt rotating speed is 100～170rpm/min.
4. mold pressing glass fiber reinforced PC LFT-D forming method according to claim 1, is characterized in that: the described melting district's number of plasticating is 8, described in the plasticate number in district of melting that is mixed be 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410229721.XA CN103991204A (en) | 2014-05-27 | 2014-05-27 | Mold pressing LFT-D molding method for glass fiber reinforced PC |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410229721.XA CN103991204A (en) | 2014-05-27 | 2014-05-27 | Mold pressing LFT-D molding method for glass fiber reinforced PC |
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| CN103991204A true CN103991204A (en) | 2014-08-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410229721.XA Pending CN103991204A (en) | 2014-05-27 | 2014-05-27 | Mold pressing LFT-D molding method for glass fiber reinforced PC |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112549397A (en) * | 2019-09-26 | 2021-03-26 | 科思创德国股份有限公司 | Method for producing a structural component and structural component |
| WO2021058677A1 (en) | 2019-09-26 | 2021-04-01 | Covestro Intellectual Property Gmbh & Co. Kg | Manufacturing method for structural components and structural component |
| CN115107301A (en) * | 2022-06-15 | 2022-09-27 | 江苏莘翔机电股份有限公司 | Production process of low-cost glass-carbon mixed heavy truck sleeper |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102260389A (en) * | 2010-05-25 | 2011-11-30 | 上海晋飞复合材料科技有限公司 | Method and apparatus for preparing long fiber reinforced thermoplastic resin composite material |
| CN103059540A (en) * | 2012-12-31 | 2013-04-24 | 安徽科聚新材料有限公司 | PC (Poly Carbonate)/ABS (Acrylonitrile Butadiene S) alloy material and preparation method thereof |
-
2014
- 2014-05-27 CN CN201410229721.XA patent/CN103991204A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102260389A (en) * | 2010-05-25 | 2011-11-30 | 上海晋飞复合材料科技有限公司 | Method and apparatus for preparing long fiber reinforced thermoplastic resin composite material |
| CN103059540A (en) * | 2012-12-31 | 2013-04-24 | 安徽科聚新材料有限公司 | PC (Poly Carbonate)/ABS (Acrylonitrile Butadiene S) alloy material and preparation method thereof |
Non-Patent Citations (2)
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| 唐磊: "《轻量化材料技术》", 31 January 2014 * |
| 迈利克: "《汽车轻量化：材料、设计与制造》", 31 May 2012 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112549397A (en) * | 2019-09-26 | 2021-03-26 | 科思创德国股份有限公司 | Method for producing a structural component and structural component |
| WO2021058677A1 (en) | 2019-09-26 | 2021-04-01 | Covestro Intellectual Property Gmbh & Co. Kg | Manufacturing method for structural components and structural component |
| CN115107301A (en) * | 2022-06-15 | 2022-09-27 | 江苏莘翔机电股份有限公司 | Production process of low-cost glass-carbon mixed heavy truck sleeper |
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Application publication date: 20140820 |