CN103354776A - Method for producing thermoplastic resin composition pellet, extruder, and die plate - Google Patents
Method for producing thermoplastic resin composition pellet, extruder, and die plate Download PDFInfo
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- CN103354776A CN103354776A CN201180067335XA CN201180067335A CN103354776A CN 103354776 A CN103354776 A CN 103354776A CN 201180067335X A CN201180067335X A CN 201180067335XA CN 201180067335 A CN201180067335 A CN 201180067335A CN 103354776 A CN103354776 A CN 103354776A
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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
- 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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
- B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
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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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/04—Particle-shaped
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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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/05—Filamentary, e.g. strands
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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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
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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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
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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
- 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
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- 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
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
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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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
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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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92723—Content, e.g. percentage of humidity, volatiles, contaminants or degassing
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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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92971—Fluids, e.g. for temperature control or of environment
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
Provided is a technology to prevent drawbacks such as the decrease in product quality, the disturbance of stable molding, etc., caused by resin residue attached and accumulated near a discharge hole of a die plate for an extruder. An extruder is provided with a die plate comprising a discharge hole capable of discharging a material in a strand shape, and a first gas blowing part which blows gas to the discharged strand-shaped material, and the extruder is used to mold a thermoplastic resin composition in a molten state. More specifically, the first gas blowing part blows the gas to at least a part on a border line between the extruded strand-shaped material and the upper portion of the opening. Further, in the die plate, the shortest distance, on the discharge surface of the die plate, from the lower end of the opening of the discharge hole to the outer periphery of the die plate is 2 mm to 5 mm inclusive.
Description
Technical field
The present invention relates to manufacture method, extruder and the mould of thermoplastic resin composition's particle.
Background technology
The method of forming during as the extruding thermoplastic resins material a kind of is widely used the extrusion molding that adopts screw extruder.Screw extruder has single shaft or multiple screw extruder, and extruder has screw rod, machine barrel (being also referred to as cylinder), drive unit, heating/cooling unit etc. usually, partly is provided with and the corresponding mould of editing objective at squit hole.
When using extruder that the thermoplastic resin composition is shaped, the thermoplastic resin composition adheres to around the squit hole that is stranded in mould, forms to be called set thing (Japanese: caking メ ヤ ニ).This set thing can carbonization and variable color.
And if extrusion molding continues the long period, then the set thing will adhere to gradually and be accumulated in extruder with near the squit hole of mould.If place in this state, then the set thing of carbonization can be attached to the extrudate that is wire.Sometimes this set thing becomes the foreign matter in the final products, and the quality of final products is descended.Also have, sometimes this set thing also become cause wire extrudate fracture etc., can't runs steadily reason.
The operation of for this reason, making the on-the-spot set thing that is necessary to use tweezers etc. to adhere to be deposited on the mould and remove.Although can not end the removal operation that extrusion molding ground carries out the set thing, owing to be handwork, operation is very numerous and diverse.
Therefore, disclose a kind of generation that can when obtaining the thermoplastic resin formed body such as wire, sheet, prevent the set thing, can realize improving productivity and keep the method that prevents the set deposits yields (with reference to patent documentation 1) of the quality etc. of product.
Also have, disclose the technology that a kind of conduct improves the problem of set thing, be provided with outstanding nozzle at the squit hole of mould, extrude the method (with reference to patent documentation 2) of thread via outstanding nozzle.
According to the technology that patent documentation 1, patent documentation 2 are put down in writing, although have certain effect for the problem of set thing, seek further improvement.
Patent documentation 1: TOHKEMY 2003-019740 communique
Patent documentation 2: TOHKEMY 2003-136579 communique
Summary of the invention
The problem that invention will solve
The present invention makes in order to solve above problem, and its purpose is, provides near a kind of set thing that adheres to accumulation the squit hole of extruder with mould that is suppressed to make the quality of product descend, hinder the technology of the problems such as stable formation.
For the scheme of dealing with problems
The inventor is repeatedly attentively research in order to solve above-mentioned problem.It found that: just can solve above-mentioned problem by using following extruder to thermoplastic resin composition's shaping of molten condition, this extruder has mould and the 1st gas blows section, this mould has the squit hole that is the wire ejection for the thermoplastic resin composition with molten condition, and the 1st gas section of blowing is used for gas is blown to the thread that sprays.More specifically, find: blow at least a portion on the boundary line between the top of opening that section blows to gas the thread that is extruded and above-mentioned squit hole from above-mentioned the 1st gas, above-mentioned mould is for the beeline to the mould periphery is 2mm～5mm from the lower end of the opening of squit hole on the ejection face of mould, just can solve above-mentioned problem, thereby finish the present invention.The invention provides following technical scheme.
(1) a kind of manufacture method of thermoplastic resin composition's particle, it is the method for using extrusion mechanism fabricate-heat thermoplastic resin composition particle, it is characterized in that, when the squit hole of the mould that certainly is located at above-mentioned extruder is the thermoplastic resin composition of molten condition wire and extrudes, with gas blow to the thread that is extruded and above-mentioned squit hole by at least a portion on the boundary line between the top of the opening of ejection face side, on the ejection face of above-mentioned mould, the beeline from the lower end of the opening of above-mentioned squit hole to the periphery of above-mentioned mould is 2mm～5mm.
(2) according to the manufacture method of the described thermoplastic resin composition's particle of technical scheme (1), wherein, at least a portion on the above-mentioned boundary line is to comprise the upper end of above-mentioned opening and the part of the point of interface between the above-mentioned thread, and, also to a part of blow gas of the point of interface between the lower end that comprises above-mentioned opening and the above-mentioned thread.
(3) according to the manufacture method of the described thermoplastic resin composition's particle of technical scheme (2),
Wherein, above-mentioned ejection face at above-mentioned mould is formed with notch part, above-mentioned notch part is formed on the position of side on the lower, position of the above-mentioned opening of ratio of above-mentioned ejection face, and the gas that blows to the part of the point of interface between the lower end that comprises above-mentioned opening and the above-mentioned thread passes because forming the cut space that forms of above-mentioned notch part.
(4) a kind of extruder, wherein, this extruder has mould and the 1st gas blows section, this mould has the squit hole that is the wire ejection for the thermoplastic resin composition with molten condition, the 1st gas section of blowing is used for gas is blown to the thread that sprays, on the ejection face of above-mentioned mould, beeline from the lower end of the opening of above-mentioned squit hole to the periphery of above-mentioned mould is 2mm～5mm, when the thermoplastic resin composition with molten condition is wire and extrudes, above-mentioned gas blow section to the thread that is extruded and above-mentioned squit hole by at least a portion blow gas on the boundary line between the top of the opening of ejection face side.
(5) according to the described extruder of technical scheme (4), wherein, at least a portion on the above-mentioned boundary line is to comprise the upper end of above-mentioned opening and the part of the point of interface between the above-mentioned thread.
(6) according to technical scheme (4) or (5) described extruder, wherein, above-mentioned extruder also has the 2nd gas and blows section, and the 2nd gas section of blowing is from a part of blow gas than the point of interface of position on the lower, position between the lower end that comprises above-mentioned opening and above-mentioned thread of the above-mentioned opening of above-mentioned ejection face.
(7) according to the described extruder of technical scheme (6), wherein, be formed with notch part at above-mentioned ejection face, above-mentioned notch part is formed on the position of side on the lower, position of the above-mentioned opening of ratio of above-mentioned ejection face, and the gas that blows from above-mentioned the 2nd gas section of blowing passes because forming the cut space that forms of above-mentioned notch part.
(8) a kind of mould, it has squit hole, and this squit hole is used for the thermoplastic resin composition of molten condition is the wire ejection, wherein, on the ejection face of above-mentioned mould, the beeline from the lower end of the opening of above-mentioned squit hole to the periphery of above-mentioned mould is 2mm～5mm.
(9) according to the described mould of technical scheme (8), wherein, be formed with notch part at above-mentioned ejection face, above-mentioned notch part is formed on the position of side on the lower, position of the above-mentioned opening of ratio of above-mentioned ejection face.
The effect of invention
Adopt the present invention, compared with prior art can suppress significantly extruder and make the problems such as the quality of product descends, obstruction stable formation with near the set thing of the accompanying accumulation squit hole of the ejection face of mould.
Description of drawings
Fig. 1 is the figure in cross section that schematically shows the extruder of embodiment.
Fig. 2 is the figure that schematically shows the mould of embodiment, and Fig. 2 (a) is stereogram, and Fig. 2 (b) is front view, and Fig. 2 (c) is side view.
To be expression blow section to the schematic diagram of the situation of thermoplastic resin composition's blow gas of being wire ejection from the 1st gas to Fig. 3.
Fig. 4 is that expression blows section to the schematic diagram of the situation of the periphery blow gas of the ejection face of mould from the 2nd gas.
Fig. 5 is the chart of the quantity of the painted particle of expression.
The specific embodiment
Below, explain embodiments of the present invention.Need to prove that the present invention is not limited by following embodiment.
(extruder)
Fig. 1 is the figure in cross section that schematically shows the extruder 1 of present embodiment.Extruder 1 has that feeding funnel 10, machine barrel 11, screw rod 12, mould 13, the 1st gas blow section 14, the 2nd gas blows section 15.
The using method of simple declaration extruder 1.Supply with the thermoplastic resin composition 2 who comes from feeding funnel 10 and pass between machine barrel 11 and screw rod 12 by the rotation of screw rod 12, and carry to the direction of mould 13.In this course of conveying, thermoplastic resin composition 2 is because being subject to the shearing force melting from machine barrel 11, screw rod 12.The thermoplastic resin composition 2 of melting is the wire ejection from mould 13.Below the thermoplastic resin composition 2(of wire, be called sometimes thread) just sprayed after, just blow section 14 to its blow gas from the 1st gas.In addition, blow section 15 towards mould 13 blow gas that are used for ejection thermoplastic resin composition 2 from the 2nd gas.
Then, further specify the mould 13 that has for the thermoplastic resin composition's 2 who sprays molten condition squit hole.Below the mould of explanation is an example of mould of the present invention.Fig. 2 is the figure that schematically shows mould 13, and Fig. 2 (a) is stereogram, and Fig. 2 (b) is front view, and Fig. 2 (c) is side view.
The opening by ejection face A side of squit hole 130 is positioned on the ejection face A.Beeline (distance between the Δ x=PQ) between the periphery of the lower end P of the above-mentioned opening of ejection face A and ejection face A is 2mm～5mm.If this condition is satisfied in the position of the opening of ejection face A side, then forming in any case squit hole 130 on mould 13 can.
For example, although the opening of ejection face A side and the opening that is positioned on the face of a side opposite with the face of ejection A are positioned at the position of facing mutually in Fig. 2, be not particularly limited the opening position relationship each other at the two ends that are positioned at squit hole 130.In addition, although squit hole 130 is holes of the linearity that extends along thermoplastic resin composition 2 flow direction in Fig. 2, but squit hole 130 also can be offset along the flow direction from thermoplastic resin composition 2 direction of the angle of regulation to be extended, in addition, also can be linearity shape in addition.Therefore, can set as one sees fit the position of the opening of the face that is positioned at a side opposite with ejection face A, the shape of stream that thermoplastic resin composition 2 passes.
In addition, be that 1 situation is illustrated to squit hole among Fig. 2 130, but also can be the mould with a plurality of squit holes 130.In the situation with a plurality of squit holes 130, preferably for all squit holes, above-mentioned beeline is 2mm～5mm.In addition, preferably blow section, the 2nd gas from the 1st gas and blow section to thermoplastic resin composition's 2 blow gas of certainly all squit hole ejections.In this case, the 1st gas blows section, the 2nd gas section of blowing and is made of a plurality of gas section of blowing.
Then, illustrate that the 1st gas blows section 14.Fig. 3 is that expression blows section 14 to the schematic diagram of the situation of thread blow gas from the 1st gas.
In the present embodiment, the 1st gas blows section 14 and is configured in position than the top side in position of the opening on ejection face A of squit hole 130.And the 1st gas blows section 14 at least a portion blow gas on the boundary line between the top of the opening on the thread that is extruded and above-mentioned ejection face A, and adjusts the position of gas purge port.At this, " boundary line between the top of the opening on the thread that is extruded and the above-mentioned ejection face A " refers to the periphery of semicircle of upside of above-mentioned opening and the boundary line between the thread.In the present embodiment, at least a portion on the boundary line comprises the upper end of above-mentioned opening and the point of interface between the thread.
Need to prove, and be not particularly limited the kind of the gas that blows, can atmosphere, non-active gas etc. be shown example.In addition, also can adjust humidity, the temperature that the 1st gas blows the gas that section 14 blows.The adjustment of humidity, temperature can be undertaken by present known control method.In addition, can in the scope that reaches the aftermentioned effect, take the circumstances into consideration to adjust to the flow of gas.For example, preferably the blast of gas is adjusted into 1kgf/cm
2Above 4kgf/cm
2Below.Preferably the reasons are as follows: if blast is 1kgf/cm
2More than, the set thing is cooled and peels off from mould easily, if blast is 4kgf/cm
2Below, can prevent from stopping up at squit hole place generation resin because mould is cooled.Being more preferably blast is 1kgf/cm
2Above 3kgf/cm
2Below.
The gas purge port that blows section 14 from the 1st gas is not particularly limited to the beeline the thread, but is below the 20cm in the present embodiment.Because above-mentioned beeline below 20cm, can suppress the situation that the spray regime of gas causes mould 13 to be cooled greatly.
The upper end of above-mentioned opening and the point of interface between the thread and the 1st gas are blowed the straight line that the gas vent of section 14 couples together in the scope that can realize effect of the present invention, suitably to adjust between 0 ° to 90 ° with above-mentioned ejection face A angulation θ 1, but optimized angle θ 1 is more than 0 ° below 60 °.But, among the present invention, compare with above-mentioned spray angle, importantly gas is blown on the boundary line between the top of the thread that is extruded and the opening on the above-mentioned ejection face A.
Then, illustrate that the 2nd gas blows section 15.Fig. 4 schematically shows to blow section 15 from the 2nd gas and gas is sprayed to figure in the situation of the lower end of the opening of above-mentioned ejection face and the point of interface between the above-mentioned thread.
The 2nd gas blows section 15 and is configured in position on the lower, position than the opening on ejection face A of squit hole 130.In the present embodiment, the beeline (distance between the Δ x=PQ) between the periphery of the lower end P of the above-mentioned opening of ejection face A and ejection face A is below the 5mm.Therefore, even the purge port of gas is located at than ejection face A by extruding the position of pusher side, direction that also can be by the adjustment blow gas etc. blow to gas at the lower end of the opening of above-mentioned ejection face and the point of interface between the above-mentioned thread.That is, as shown in Figure 4, by near blow gas above-mentioned point of interface, gas also can blow to point of interface.
In order gas to be blown at the lower end of the opening of above-mentioned ejection face and the point of interface between the above-mentioned thread, can take the circumstances into consideration to adjust the 2nd gas blowed the gas vent of section 15 and straight line that above-mentioned point of interface couples together and along the straight line angulation θ 2 that direction is extended that extrudes of extruder in realizing the scope of effect of the present invention, still preferred above-mentioned angle θ 2 is more than 100 ° below 150 °.
The distance that the upper end of preferred above-mentioned opening and the point of interface between the thread and the 2nd gas blow between the gas purge port of section 15 is below the 20cm.The nearlyer gas projected area of distance is less and can suppress the cooling of mould 13.
Blow the gas that section 15 blows from gas and pass the space that is surrounded by two chain-dotted lines.The space that double dot dash line is surrounded refers to because forming the notch part 131 cut spaces that form.
The kind of spendable gas is identical with the kind that above-mentioned the 1st gas blows section's 14 spendable gases.In addition, also can adjust humidity, the temperature of above-mentioned gas.In addition, also can in the scope of not damaging the aftermentioned effect, take the circumstances into consideration to adjust for blast etc.For example, preferably the blast of gas is adjusted into 1kgf/cm
2Above 5kgf/cm
2Below.Preferably the reasons are as follows: if blast is 1kgf/cm
2More than, the set thing is cooled and is stripped from from mould easily, if blast is 5kgf/cm
2Below, can prevent from causing resin combination to stop up at the squit hole place owing to mould is cooled.The blast that is more preferably is 1.5kgf/cm
2Above 3.5kgf/cm
2Below.
In addition, preferably blow off and on blow gas of section 15 from the 2nd gas.Blow gas refers to that official hour interval, interval comes blow gas off and on.The official hour interval can be the interval of fixing, and also can not be the interval of fixing.And, can adjust as one sees fit the official hour interval.
Then, thermoplastic resin composition 2 is described.Thermoplastic resin composition 2 is contained thermoplastic resin.As thermoplastic resin, the resin that plastifies if utilize shear rate, heating is not just done restriction, such as enumerating polyethylene, polypropylene, polystyrene, (methyl) acrylic resin, polyamide, Merlon, polyacetals, thermoplastic polyester, thermoplastic elastomer (TPE), polyphenylene sulfide, liquid crystal polymer etc., these resins can independent or two or more and usefulness.
Extruder of the present invention also is fit to be used in the extrusion molding of thermoplastic resin in the above-mentioned thermoplastic resin, that especially the high-melting-point such as engineering plastics and metal adaptation are high.Here, as dystectic thermoplastic resin, be that fusing point is 150 ℃～400 ℃ thermoplastic resin, particularly, preferred polyamide, polyester, polyphenylene sulfide, liquid-crystalline polymer, especially preferred polyphenylene sulfide.
In thermoplastic resin composition 2, in the scope of not damaging effect of the present invention, can add other thermoplastic resin, various compounding ingredients etc. as required.As other resin, for example, illustration has other polyolefin resin, polystyrene resins, fluororesin etc.Can be separately or make up more than 2 kinds these other resin and use.Also have, as compounding ingredient, illustration has the reinforcing agents such as stabilizing agent (antioxidant or antioxidant, ultra-violet absorber, heat stabilizer etc.), glass fibre, antistatic agent, fire retardant, flame retardant, colouring agent (dyestuff, pigment etc.), lubricant, plasticiser, lubricant, releasing agent, crystallization nucleating agent, Antidrip agent, crosslinking agent etc.
In the composition of above-mentioned other, preferably use reinforcing agent.As the reinforcing agent that adds thermoplastic resin composition 2 to and use, can enumerate have fibrous, powdery, the reinforcing agent of the various shapes such as tabular, needle-like, crosswise, bulk.Especially the reinforcing agent of optimum fiber shape uses inorfil or the organic fibers such as glass fibre, ceramic fibre, carbon fiber, metal cover glass fiber.Also have, the surface of these fibrous fillers also can utilize silane compound etc. to carry out surface treatment.In these, consider especially glass fibre of preferred inorfil from heat resistance.
Feeding funnel 10, machine barrel 11, screw rod 12 can use the employed member of common extruder.Extruder can be to have single shaft, multiaxis or the extruder of screw rod that single shaft and multiaxis are combined.In addition, extruder is in the situation of multiple screw extruder, and the direction of rotation of screw rod can also can be equidirectional for different directions at each axle, and can be that occlusal pattern also can be non-occlusal pattern.Furthermore, the shape of axle can be parallel type (Japanese: パ ラ レ Le タ イ プ) also can be circular cone type (Japanese: コ ニ カ Le タ イ プ), and, it also can be the series system that screw extruder is multistage-combination, can packing in these extruders, mould of the present invention, the 1st gas blow section, the 2nd gas blows section, thereby the thermoplastic resin composition is carried out extrusion molding.
(manufacture method of thermoplastic resin composition's particle)
From the 1st gas blow section 14 gas is blown to the thread that is extruded and above-mentioned squit hole 130 by at least a portion on the boundary line between the upper opening portion of ejection face A side.In the present embodiment, gas is blown to the upper end that comprises above-mentioned opening and the part of the point of interface between the above-mentioned thread.Because carrying out this gas blows, and can promote the generation of set thing.Major part in the set thing that produces is owing to the blast of gas comes off.
(effect)
In the present embodiment, the 1st gas blows the formation of the caking that section 14 can promote thermoplastic resin compositions (below, be sometimes referred to as the set thing).This set thing is attached on the ejection face A, under normal conditions, and this set thing carbonization blackening.But, when being wire and extruding the thermoplastic resin composition 2 of molten condition, owing to gas is blown at least a portion institute produce an effect on the boundary line between the upper opening portion of ejection face A side of leaning on of the thread that is extruded and squit hole 130, even before the set thing is attached on the ejection face A or on the ejection face of the being attached to A, also can before carbonization, be blown off by the blast of gas.So, promote will Cheng Wei ?after the formation of set thing of look set thing, rapidly with gas this set thing that blows off, rest on ejection face A and carbonization thereby can suppress the set thing.
In addition, as mentioned above, the gas by blow section 14 from the 1st gas blows off it before the carbonization of set thing.Its result even the set thing that is blown off is blended in the particle that the thread cut-out is obtained, can not produce the problem that foreign matter is sneaked into yet.
Need to prove that the set thing can come off because of deadweight sometimes.
In the set thing of the ejection face of being attached to A, sometimes be attached near the squit hole 130 of mould 13 the set thing because of and the ejection process in thread between the friction that produces come off, and be blended in the thread in the ejection process.In the present embodiment, the result of blow gas is as follows as described above: above-mentioned the coming off that causes because of above-mentioned friction that can promote to be attached to the set thing of squit hole 130.Therefore, even above-mentioned friction is weak friction, the set thing also can fall down and be blended in the thread.That is, having the set thing is attached to and falls down at short notice after the squit hole 130 and be blended into tendency in the thread.Therefore, even the set thing is blended in the particle that cuts off thread and obtain, can not produce the problem that foreign matter is sneaked into yet.
In the present embodiment, have the 2nd gas and blow section 15.Blow section 15 because have the 2nd gas, even the set thing accumulates near the lower end of opening of ejection face A side, also can be by the point of interface between the lower end that gas is blown to above-mentioned thread and above-mentioned opening, thus the set thing is blown off in early days.Therefore, almost eliminated the possibility of set thing generation carbonization on ejection face A.Need to prove, although can utilize near the set thing the 1st gas blows the lower end of opening that gas that section 14 blows makes the ejection face of being attached to A side to fall down, but blow section 15 by the 2nd gas is set, the set thing is fallen down before variable color.
In the present embodiment, the beeline (Δ x) between the periphery of the lower end P of the periphery of the above-mentioned opening of ejection face A and ejection face A is below the 5mm.Therefore, the contact area between ejection face A and the set thing diminishes.Its result, the closing force between set thing and the ejection face A reduces, and therefore, especially under the effect that blows the gas that section 15 blows from the 2nd gas, is easy to make the set thing to fall down.Therefore, even the set thing is blended in the product that the particle that thread cut off and obtain makes as raw material, can not produce the problem that foreign matter is sneaked into yet.
Need to prove that in the present invention, above-mentioned beeline is more than the 2mm, this is because during less than 2mm, can produce the problems such as insufficient strength of mould in above-mentioned beeline.Therefore, even above-mentioned beeline less than 2mm, also can play the effect of the manufacture method of present embodiment.
In addition, even in the situation of blow gas indirectly, also can play fully to utilize from the 2nd gas blowing the gas that section 15 blows and the above-mentioned effect that obtains.In addition, by blow gas indirectly, be attached to the set thing that the state of ejection face A and the ejection face of hanging on A exists with the part and rock thereby can make, this set thing is fallen down.In addition, by blow gas indirectly, can suppress mould 13 and be cooled.By suppressing the cooling of mould 13, thereby can suppress the ejection problem such as unstable that becomes.
In the present embodiment, face A is formed with notch part in ejection, and above-mentioned notch part is formed on the position of side on the lower, position of the ratio squit hole 130 of ejection face A.And, blow the gas that section 15 blows from the 2nd gas and pass because forming the cut space that forms of notch part.That is to say that the 2nd gas blows the certainly oblique below of section 15 towards the periphery blow gas of mould 13.Therefore, constitute below mould 13 configuration gas and blow section 15.In the present invention, blow section 15 although also the 2nd gas can be disposed below thread, but can produce following situation: if position configuration the 2nd gas like this below thread blows section 15, when thread ruptures, the thread of fracture can drop to the 2nd gas and blow in the section 15, and make the 2nd gas blow section's 15 breakages, in addition, can produce for the sensor of the notice thread fracture problem such as do not work.Need to prove that this problem can solve by the following method: utilize guard member that the 2nd gas spray section, the sensor that is used for the fracture of notice extrudate are protected, damage sensor and can prevent that thread because of fracture from falling down.
In addition, be configured in the position of leaving a little from mould 13 although also the 2nd gas can be blowed section 15, and do not pass the periphery that spatially gas is blown to mould 13 that is formed by breach, but when adopting such method, for falling down, the set thing that makes the ejection face of being attached to not only needs stronger blast, and because the spray regime of meeting enlargement gas causes mould 13 to be cooled, sometimes also can cause the problem of ejection inequality etc.
Therefore, pass the periphery that the space that is formed by breach blows to mould 13 by making the gas that blows section 15 from the 2nd gas, and can suppress the cooling of mould 13, even problem especially as described above can not occur in the situation of thread fracture yet.
As mentioned above, in the present embodiment, the 2nd gas blows section 15 and is configured in the position by the rear than ejection face A, blows the gas that section 15 blows from the 2nd gas and passes because forming the cut space that forms of notch part.But, in the present invention, also the 2nd gas can be blowed section 15 and be configured in the position on the front than ejection face A.Need to prove, sometimes need in this case above-mentioned such guard member.
In the present embodiment, the 1st gas blows section 14 from the position blow gas that is spraying the top side in position on the face A than squit hole 130.Although the 1st gas blow section 14 also can be from the right side or the left side to the thread blow gas of ejection, but have in use in the situation of mould of a plurality of squit holes, for in the mode that plays effect of the present invention to all squit hole blow gas, preferably from the top blow gas.
＜embodiment＞
Below, enumerate embodiment the present invention is described in further detail, but the present invention is not limited to these embodiment.
(device etc.)
Mould 1: it is the mould that Fig. 2 puts down in writing, and the distance between the PQ is 2mm.In addition, the opening portion of squit hole is the circle of diameter 3mm.
Mould 2: it does not have notch part 131, in addition, is identical mould (because do not have notch part, the distance of the part suitable with the distance between the PQ of mould 1 is more than the 5mm, particularly, is 50mm) with mould 1.
Extruder: upper such as Fig. 1 at biaxial extruder (JSW make TEX65), dispose like that shown in 3,4 that the 1st gas blows section, the 2nd gas blows section.
The gas purge port that blows section from the 1st gas is 5cm to the beeline the thread.
＜comparative example 1＞
When extrusion molding, take the air of normal temperature at blast as 2kgf/cm
2Condition under, blow section to the blow gas continuously of the point of interface between the upper end of opening of thread and ejection face from the 1st gas.
＜embodiment 1＞
Except mould 2 being changed to mould 1, use the quantity of the method measurement colored particles identical with comparative example 1.The extrusion molding that experiment numbers 241～350 is carried out under the condition of the above embodiments 1.Fig. 5 shows measurement result.
＜embodiment 2＞
Except blow the mode blow gas of section with the point of interface between the lower end that can brush above-mentioned thread and above-mentioned opening from the 2nd gas, use the quantity of the painted particle of the method measurement identical with embodiment 1.
The extrusion molding that experiment numbers 351～550 is carried out under the condition of the above embodiments 2.Fig. 5 shows measurement result.
Need to prove, the 2nd gas section of blowing be set as utilize normal temperature air at 3kgf/cm
2The blast of condition under blow gas off and on.
Can confirm following situation from the result of embodiment 1 and comparative example 1: the beeline between the periphery of the lower end of the periphery of the above-mentioned opening by making ejection face and ejection face shortens and the two combines and can significantly reduce the quantity of the colored particles that generates because of the set thing from the top blow gas.
Can confirm following situation from the result of embodiment 2 and embodiment 1: by the above embodiments 1 are further appended from the position of below blow gas, and colored particles quantity can be suppressed to almost nil.
In addition, the resin particle of being made by embodiment 1, embodiment 2 has been carried out general physical attribute (particularly, melt viscosity, burn resin particle and measure Ash and measure glass-filled amount, hot strength, bending strength) evaluation, the result is equal to the resin particle of being made by commonsense method.That is, for the physical attribute aspect of resulting resin particle, do not find because having used the impact that mould of the present invention produces and having carried out the impact that blow gas produces.
Description of reference numerals
1 extruder
10 feeding funnels
11 machine barrels
12 screw rods
13 moulds
130 squit holes
131 notch parts
14 the 1st gases blow section
15 the 2nd gases blow section
2 thermoplastic resin compositions
Claims (9)
1. the manufacture method of thermoplastic resin composition's particle, it is the method for using extrusion mechanism fabricate-heat thermoplastic resin composition particle, it is characterized in that,
When the squit hole of the mould that certainly is located at above-mentioned extruder is the thermoplastic resin composition of molten condition wire and extrudes, with gas blow to the thread that is extruded and above-mentioned squit hole by at least a portion on the boundary line between the top of the opening of ejection face side
On the ejection face of above-mentioned mould, the beeline from the lower end of the opening of above-mentioned squit hole to the periphery of above-mentioned mould is 2mm～5mm.
2. the manufacture method of thermoplastic resin composition's particle according to claim 1, wherein,
At least a portion on the above-mentioned boundary line is to comprise the upper end of above-mentioned opening and the part of the point of interface between the above-mentioned thread,
And, to the part of the lower end that comprises above-mentioned opening and the point of interface between the above-mentioned thread also blow air.
3. the manufacture method of thermoplastic resin composition's particle according to claim 2, wherein,
Above-mentioned ejection face at above-mentioned mould is formed with notch part,
Above-mentioned notch part is formed on the position of side on the lower, position of the above-mentioned opening of ratio of above-mentioned ejection face,
The gas that blows to the part of the point of interface between the lower end that comprises above-mentioned opening and the above-mentioned thread passes because forming the cut space that forms of above-mentioned notch part.
4. extruder, wherein,
This extruder has mould and the 1st gas blows section, and this mould has the squit hole that is the wire ejection for the thermoplastic resin composition with molten condition, and the 1st gas section of blowing is used for gas is blown to the thread that sprays,
On the ejection face of above-mentioned mould, the beeline from the lower end of the opening of above-mentioned squit hole to the periphery of above-mentioned mould is 2mm～5mm,
When the thermoplastic resin composition with molten condition is wire and extrudes, above-mentioned gas blow section to the thread that is extruded and above-mentioned squit hole by at least a portion blow gas on the boundary line between the top of the opening of ejection face side.
5. extruder according to claim 4, wherein,
At least a portion on the above-mentioned boundary line is to comprise the upper end of above-mentioned opening and the part of the point of interface between the above-mentioned thread.
6. according to claim 4 or 5 described extruders, wherein,
Above-mentioned extruder also has the 2nd gas and blows section, and the 2nd gas section of blowing is from a part of blow gas than the point of interface of position on the lower, position between the lower end that comprises above-mentioned opening and above-mentioned thread of the above-mentioned opening of above-mentioned ejection face.
7. extruder according to claim 6, wherein,
Be formed with notch part at above-mentioned ejection face,
Above-mentioned notch part is formed on the position of side on the lower, position of the above-mentioned opening of ratio of above-mentioned ejection face,
The gas that blows from above-mentioned the 2nd gas section of blowing passes because forming the cut space that forms of above-mentioned notch part.
8. mould, it has squit hole, and this squit hole is used for the thermoplastic resin composition of molten condition is the wire ejection, wherein,
On the ejection face of above-mentioned mould, the beeline from the lower end of the opening of above-mentioned squit hole to the periphery of above-mentioned mould is 2mm～5mm.
9. mould according to claim 8, wherein,
Be formed with notch part at above-mentioned ejection face,
Above-mentioned notch part is formed on the position of side on the lower, position of the above-mentioned opening of ratio of above-mentioned ejection face.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2011/058223 WO2012131980A1 (en) | 2011-03-31 | 2011-03-31 | Method for producing thermoplastic resin composition pellet, extruder, and die plate |
Publications (2)
| Publication Number | Publication Date |
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| CN103354776A true CN103354776A (en) | 2013-10-16 |
| CN103354776B CN103354776B (en) | 2016-03-30 |
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| CN201180067335.XA Active CN103354776B (en) | 2011-03-31 | 2011-03-31 | The manufacture method of thermoplastic resin composition's particle, extruder and mould |
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| Country | Link |
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| JP (1) | JP5728077B2 (en) |
| CN (1) | CN103354776B (en) |
| MY (1) | MY161684A (en) |
| TW (1) | TWI564136B (en) |
| WO (1) | WO2012131980A1 (en) |
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| CN111132810A (en) * | 2017-09-28 | 2020-05-08 | 宝理塑料株式会社 | Die for extruder, and method for producing resin composition |
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| JP7223595B2 (en) * | 2019-02-19 | 2023-02-16 | ポリプラスチックス株式会社 | Deposit removing device and method |
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| JP2003019740A (en) * | 2001-07-06 | 2003-01-21 | Daicel Polymer Ltd | Method for preventing generation of deteriorated resin |
| CN1417016A (en) * | 2001-11-01 | 2003-05-14 | 宝理塑料株式会社 | Mold unit and extrusion method for resin extruder |
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| JP5728077B2 (en) | 2015-06-03 |
| WO2012131980A1 (en) | 2012-10-04 |
| MY161684A (en) | 2017-05-15 |
| TW201249628A (en) | 2012-12-16 |
| CN103354776B (en) | 2016-03-30 |
| TWI564136B (en) | 2017-01-01 |
| JPWO2012131980A1 (en) | 2014-07-24 |
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