CN102653116A - Drying system and drying method - Google Patents
Drying system and drying method Download PDFInfo
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- CN102653116A CN102653116A CN2012100583576A CN201210058357A CN102653116A CN 102653116 A CN102653116 A CN 102653116A CN 2012100583576 A CN2012100583576 A CN 2012100583576A CN 201210058357 A CN201210058357 A CN 201210058357A CN 102653116 A CN102653116 A CN 102653116A
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- Prior art keywords
- drying
- powder body
- container
- temperature
- hopper
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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
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/58—Component parts, details or accessories; Auxiliary operations
- B29B7/60—Component parts, details or accessories; Auxiliary operations for feeding, e.g. end guides for the incoming material
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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
- B29B13/00—Conditioning or physical treatment of the material to be shaped
- B29B13/06—Conditioning or physical treatment of the material to be shaped by drying
- B29B13/065—Conditioning or physical treatment of the material to be shaped by drying of powder or pellets
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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
- B29B7/00—Mixing; Kneading
- B29B7/80—Component parts, details or accessories; Auxiliary operations
- B29B7/82—Heating or cooling
- B29B7/826—Apparatus therefor
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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
- B29B9/16—Auxiliary treatment of granules
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
- F26B17/10—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle, e.g. pneumatic, flash, vortex or entrainment dryers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/14—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects using gases or vapours other than air or steam, e.g. inert gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B2200/00—Drying processes and machines for solid materials characterised by the specific requirements of the drying good
- F26B2200/08—Granular materials
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention provides a drying system and a drying method capable of preventing deterioration of powder particles due to heating in a forming machine, and inhibiting yellowing of forming products. The particles after drying are provided to a drying system (1) of a forming machine (2), the drying system is provided with a first drying part (3) provided with a first storage hopper (13) storing the particles, a second drying part with a second storage hopper (33) with a volume smaller than the volume of the first storage hopper (13) and disposed on the forming machine (2), and a conveying pipeline (51) connected between the first storage hopper (13) and the second storage hopper (33), and conveying the particles from the first storage hopper (13) to the second storage hopper (33), after the particles are dried under a first temperature in the first storage hopper (13), the particles are dried under a second temperature higher than the first temperature while nitrogen displacement is performed in the second storage hopper (33), then via deadweight, powder falls from the second storage hopper (33) into the forming machine (2).
Description
Technical field
The present invention relates to a kind of drying system and drying means that the powder body is carried out drying.
Background technology
Usually, under situation such as plastic shaping, generally be to utilize drying device will carry out as the powder bodies such as plastics granule of moulding material dropping into make-up machine after the drying.
Drying device as that kind; Known have for example with arranged in series about jet flow drying section and the portable dry portion; Utilize the jet flow drying section that the material that sheet of nylon etc. is dried is carried out preheating and drying, utilize portable dry portion that the material that sheet of nylon etc. is dried is carried out main dry shot-like particle drying device (for example with reference to following patent documentation 1).
The prior art document
Patent documentation: japanese kokai publication hei 2-217777 communique
Summary of the invention
The problem that invention will solve
Yet; For utilizing above-mentioned patent documentation 1 described shot-like particle drying device; After the material that is dried is carried out drying, will carry out the dried material that is dried and offer make-up machine, for example rely on strength to carry the problem that the material that is dried is carried to make-up machine being studied.
, when strength is carried the material that is dried, cause dry thing to contain moisture and oxidizing gas (for example oxygen, nitric oxide) sometimes because of contacting with pumped (conveying) medium (air).
What contain moisture and oxidizing gas is dried thing when moulding, makes the material that is dried rotten sometimes because of the heating of in make-up machine, carrying out, and unfavorable conditions such as for example moulding article flavescence take place.
Therefore, the objective of the invention is to, provide a kind of can preventing to suppress the drying system and the drying means of formed products flavescence because the heating in the make-up machine causes the powder body rotten.
The technical scheme that is used to deal with problems
In order to achieve the above object; Claim 1 is described; The powder body is carried out after the drying its drying system that offers make-up machine is characterized in that possessing: have the 1st container of storing the powder body; Under the 1st temperature with the powder body in said the 1st container carry out the 1st dry drying section, to have formation littler than said the 1st vessel volume; Be arranged on the 2nd container on the said make-up machine, the powder body in said the 2nd container carried out the 2nd dry drying section and is connected in said the 1st container and said the 2nd container with the 2nd temperature that is higher than said the 1st temperature, with the powder body from the delivery section of said the 1st container to said the 2nd container transport; The air of replacing in said the 2nd container is a non-active gas, relies on gravity that the powder body in said the 2nd container is offered said make-up machine.
If adopt this structure, the 2nd container is arranged on the make-up machine top, under the environment of non-active gas, the powder body in the 2nd container is carried out drying, and rely on gravity that it is offered make-up machine with the 2nd temperature that is higher than the 1st temperature.
Therefore; From the 1st container during the 2nd container transport; Even the gas in powder body and the delivery section contact,, when replacing with non-active gas in also can the 2nd container on make-up machine the powder body is carried out drying attached to moisture on the powder body and oxidizing gas increase.
Like this, from the 1st container during the 2nd container transport, although the gas in powder body and the delivery section contact, also can be before being about to offer make-up machine, reduction is attached to the moisture and the oxidizing gas of powder body.
Again, the volume of volumetric ratio the 1st container of the 2nd container is little.
For this reason; Before being about to offer make-up machine; Can be stored in a part of powder body in the 1st container in the 2nd container of less volume expeditiously (with the shorter time) carry out drying, thereby can shorten the time of the powder body being heated with the 2nd higher temperature.
Its result can prevent that the powder body that causes in the heating of make-up machine internal cause is rotten, thereby can suppress the flavescence of moulding article.
Again, the described invention of claim 2 is in the described invention of claim 1, it is characterized in that said the 2nd drying section carries out drying with the 2nd temperature that is higher than said the 1st temperature with the powder body in said the 2nd container.
If adopt such structure,, the powder body in the 2nd container is carried out drying with the 2nd temperature that is higher than the 1st temperature then at the 2nd drying section.
Therefore, can with the 1st relatively low temperature, when suppressing the flavescence of powder body, carry out drying,, expeditiously the powder body through the 1st drying section dried carried out drying with the 2nd higher relatively temperature at the 2nd drying section at the 1st drying section to it.
Like this, can suppress the flavescence of powder body, simultaneously expeditiously to its drying.
Again, the described invention of claim 3 is in claim 1 or 2 described inventions, it is characterized in that, the time ratio that carries out drying at said the 1st drying section is long in the time that said the 2nd drying section carries out drying.
If adopt such structure, then can reduce with the 2nd high relatively temperature and carry out the 2nd dry drying section carries out drying to the powder body time.
Therefore, can suppress the flavescence of powder body better.
Again; The described invention of claim 4 is in any described invention in claim 1～3, it is characterized in that; Temperature in said the 1st container; With said the 1st temperature is benchmark, and the temperature that forms the bottom is relatively higher than the deviation of the temperature of upper end, said delivery section from the bottom of said the 1st container to said the 2nd container transport powder body.
If adopt such structure, then the temperature in the 1st container is a benchmark with said the 1st temperature, and the temperature of formation bottom is relatively higher than the deviation of the temperature of upper end.
Therefore, along with the powder body moves in the 1st container from top to bottom, degree of drying improves gradually, and before being about to be transported to the 2nd container, the powder body is the driest, can the powder body of such dried be flowed to the 2nd container.
Its result can shorten at the 2nd drying section and carry out the dry time, further suppresses the flavescence of powder body.
Again; The described invention of claim 5 is in any described invention in claim 1～4, it is characterized in that; Said delivery section from said the 1st container to said the 2nd container transport powder body, and the not residual powder body in said delivery section its inside except that time of delivery.
If adopt such structure, can prevent to residue in the powder body moisture absorption in the delivery section.
Therefore, it is transported to the 2nd container when can make the powder body handled of in the 1st container, being dried keep its drying regime.
Its result can avoid prolonging the 2nd drying section and carry out the dry time, further suppresses the flavescence of powder body.
Again; The described invention of claim 6; It is a kind of drying means; It is characterized in that, be included under the 1st temperature powder body with the 1st quality and carry out dry operation and will carry out drying less than the powder body of the 2nd quality of said the 1st quality, the moisture that contains in the powder body is reduced to the operation below the desired value with the 2nd temperature that is higher than said the 1st temperature.
If adopt this method, when then can suppress the flavescence of powder body the powder body is carried out drying, and expeditiously the powder body is carried out drying with the 2nd higher relatively temperature with the 1st low relatively temperature.
Its result can suppress the flavescence of powder body and expeditiously the powder body carried out drying simultaneously.
The invention effect
If adopt the described invention of claim 1; Then can reduce attached to moisture on the powder body and oxidizing gas; Shorten time simultaneously, therefore can prevent to cause the powder body rotten, thereby can suppress the flavescence of moulding article in the heating of make-up machine internal cause with higher the 2nd temperature heating powder body.
Again; If adopt the described invention of claim 2; Then can be at the 1st drying section with the 1st relatively low temperature; When suppressing the flavescence of powder body, the powder body is carried out drying, expeditiously the powder body through the 1st drying section dried is carried out drying with the 2nd higher relatively temperature, therefore can when suppressing the flavescence of powder body, carry out drying to the powder body expeditiously at the 2nd drying section.
If adopt the described invention of claim 3, then can further suppress the flavescence of powder body again.
Again,, then can therefore can shorten and carry out the dry time, further suppress the flavescence of powder body being transported to the 2nd container by the powder body of dried at utmost at the 2nd drying section if adopt the described invention of claim 4.
Again; If adopt the described invention of claim 5; The powder body is residued in the delivery section; The powder body that can handle in the 1st container, being dried is kept its drying regime and is transported to the 2nd container, therefore can avoid prolonging at the 2nd drying section and carry out the dry time, further suppresses the flavescence of powder body.
Again; If adopt the described invention of claim 6; Then can when suppressing the flavescence of powder body, carry out drying with the 1st relatively low temperature to the powder body; Simultaneously under the 2nd higher relatively temperature, expeditiously the powder body is carried out drying, xeraphium plastochondria expeditiously when therefore can suppress the flavescence of powder body.
Description of drawings
Fig. 1 is the general structure chart of an example of expression drying system of the present invention.
Description of reference numerals
1 drying system
2 make-up machines
3 the 1st drying sections
4 the 2nd drying sections
13 the 1st store hopper (example of the 1st container)
33 the 2nd store hopper (example of the 2nd container)
51 feed-lines (example of delivery section)
The specific embodiment
Fig. 1 is the general structure chart of an example of expression drying system of the present invention.
This example is; As shown in Figure 1; Drying system 1 carries out drying for the powder body that the container (not shown) of storing the powder body (particle) that is formed by resin material (like resin materials such as nylon) is supplied with, and the powder body after the dried is offered the device of make-up machine 2.And in this example, the disposal ability of make-up machine 2 (quality of the powder body of time per unit melt molding) is for example 0.1～100kg/ hour.
Drying system 1; From container (not shown) on the powder body direction of the supply of make-up machine 2, the 2nd drying section 4 in the downstream that have the 1st drying section 3 that is arranged on upstream side, is arranged on the 1st drying section 3 and utilize strength to carry the strength delivery section 5 that the powder body is transported to the 1st drying section 3 and the 2nd drying section 4.
The 1st drying section 3 is the large-scale heat drying machines that were arranged in 2 minutes with make-up machine, and the powder body from container (not shown) is carried out drying.The 1st warm-air supply portion 12 that the 1st drying section 3 has the 1st reservoir 11 of storing the powder body and supplies with hot blasts to the 1st reservoir 11.
The 1st reservoir 11 has the 1st and stores hopper 13 (example of the 1st container) and the 1st charging hopper 15.
The 1st to store hopper 13 be that upper portion and the opening section of general cylindrical shape shape amasss the structure that the lower portion of down more and more littler conical shaped shape is connected.In addition, the disposal ability with make-up machine 2 is the volume that benchmark is set the 1st storage hopper 13, for example 0.6～500L.
In the upper end of the 1st storage hopper 13 input port 16 of dropping into the powder body is set again.In addition, store the outlet 17 of the bottom setting of hopper 13 the 1st from the 1st storage hopper 13 discharge powder bodies.
The 1st charging hopper 15 is to store the littler hopper of hopper 13 than the 1st, for the upper portion and the opening section of general cylindrical shape shape amasss the structure that the lower portion of down more and more littler conical shaped shape is connected.In addition, the mode that is communicated with the input port 16 of storing hopper 13 in bottom and the 1st of the 1st charging hopper 15 is connected in the upper end of the 1st storage hopper 13.And inboard at the upper wall of the 1st charging hopper 15, the attraction direction upstream-side-end that surrounds suction line 61 (hereinafter elaboration) is provided with Metal-Piercing plate 10.There are many restriction powder bodies to pass through the through hole that allows air to pass through simultaneously on the Metal-Piercing plate 10.
The 1st warm-air supply portion 12 has warm-air supply pipeline 18, drying drum blower fan 19 and pipeloop 20.
Warm-air supply pipeline 18 is the air-flow heating of self-desiccation air blast 19 in the future and the pipe arrangement that offers the 1st storage hopper 13; Its direction of the supply upstream-side-end is connected in drying drum blower fan 19; Its direction of the supply end of downstream side runs through the sidewall of the 1st storage hopper 13, is disposed at the 1st and stores in the hopper 13.The direction of the supply end of downstream side of warm-air supply pipeline 18 have be disposed at the 1st store hopper 13 bottoms near, store in the hopper 13 and open downwards nozzle 22 in order hot blast to be blown into the 1st.
Again, in the centre of warm-air supply pipeline 18, the 1st store hopper 13 arranged outside heater 21 that the air-flow from drying drum blower fan 19 is heated.
Air-supply to hot blast supply pipeline 18 in when drying drum blower fan 19 attracts in the pipeloop 20 produces and flows to the 1st from pipeloop 20 through drying drum blower fan 19 and store the interior air-flow of hopper 13.
The 2nd drying section 4 is the small-sized heat drying machines that are arranged on the make-up machine 2, before being about to offer make-up machine 2, will carry out drying from the powder body of the 1st drying section 3.The 2nd warm-air supply portion 32 that the 2nd drying section 4 possesses the 2nd reservoir 31 of storing the powder body and hot blast is provided to the 2nd reservoir 31.
The 2nd reservoir 31 possesses the 2nd and stores hopper 33 (example of the 2nd container) and the 2nd charging hopper 35.
The 2nd to store hopper 33 be that upper portion and the opening section of general cylindrical shape shape amasss the structure that the lower portion of down more and more littler conical shaped shape is connected.Again, the 2nd to store hopper 33 be the little structure of volumetric ratio the 1st storage hopper 13.The 2nd store hopper 33 volume be that benchmark is set with the disposal ability of make-up machine 2, for example be the 1st store hopper 13 volume 10～90%, specifically, 0.2～200L.
In the upper end of the 2nd storage hopper 33 input port 36 of throwing in the powder body is set again.Store the outlet 37 of the bottom setting of hopper 33 the 2nd again from the 2nd storage hopper 33 discharge powder bodies.
The 2nd charging hopper 35 is to store the little hopper of hopper 33 than the 2nd, for the upper portion and the opening section of general cylindrical shape shape amasss the structure that the lower portion of down more and more littler conical shaped shape is connected.Again, the 2nd charging hopper 35, the input port 36 of storing hopper 33 in bottom and the 2nd is connected in the upper end of the 2nd storage hopper 33 with the mode that is communicated with.And inboard at the upper wall of the 2nd charging hopper 35, the attraction direction upstream-side-end that surrounds suction line 61 (hereinafter elaboration) is provided with Metal-Piercing plate 30.The through hole of many restriction powder bodies through allowing air to pass through simultaneously arranged on the Metal-Piercing plate 30.
The 2nd warm-air supply portion 32 has warm-air supply pipeline 38, drying drum blower fan 39 and pipeloop 40.
Warm-air supply pipeline 38 is the air-flow heating of self-desiccation air blast 39 in the future and the pipe arrangement that offers the 2nd storage hopper 33; Its direction of the supply upstream-side-end is connected in drying drum blower fan 39; Its direction of the supply end of downstream side runs through the sidewall of the 2nd storage hopper 33, is disposed at the 2nd and stores in the hopper 33.Again, the direction of the supply end of downstream side setting of warm-air supply pipeline 38 is stored in the hopper 33 and open downwards nozzle 42 in order hot blast to be blown into the 2nd.
Again, in the centre of warm-air supply pipeline 38, the 2nd store hopper 33 arranged outside heater 41 that the air-flow from drying drum blower fan 39 is heated.
Air-supply to hot blast supply pipeline 38 in when drying drum blower fan 39 attracts in the pipeloop 40 produces and flows to the 2nd from pipeloop 40 through drying drum blower fan 39 and store the interior air-flow of hopper 33.
At the 2nd drying section 4 nitrogen generator unit 45, air compressor machine 46 and nitrogen supply pipeline 47 are set again.
And the 1st drying section 3 is connected through feed-line 51 (example of delivery section) with the 2nd drying section 4.
Feed-line 51 is the pipe arrangements that are used for carrying to the 2nd drying section 4 from the 1st drying section 3 the powder body.The throughput direction upstream-side-end of feed-line 51 is connected in the outlet 17 of the 1st storage hopper 13.And the conveyance direction downstream side end of feed-line 51 is connected in the sidewall of the 2nd charging hopper 35.
Strength delivery section 5 has suction line 61 and carries air blast 62.
Carry air blast 62 air-breathing in the 1st charging hopper 15 or the 2nd charging hopper 35 through suction line 61; Generation from container (not shown) flow to the 1st the charging hopper 15 air-flow, or from the 1st storage hopper 13 through feed-line 51 flow to the 1st the charging hopper 15 air-flow.
And drying system 1 is connected through supply pipeline 71 with make-up machine 2.
Below, the drying means of the powder body that uses drying system 1 is described.And this drying system 1 is reduced to the moisture that contains in the powder body for example and offers make-up machine 2 again below the 0.15 quality % (desired value).
For the powder body is carried out drying, at first transfer valve 63 is switched to the 1st position and make air blast 62 work of carrying then.And the outlet 17 of the 1st reservoir 11 is closed.
So, rely on the air-flow that flows to the 1st charging hopper 15 from container (not shown), carry the powder body from container (not shown) to the 1st charging hopper 15.The powder body of carrying to the 1st charging hopper 15 is discharged to the 1st storage hopper 13.
Like this, store hopper 13 the 1st and store the for example powder body of 50kg (example of the 1st quality).
At this moment, the moisture that comprises in the powder body of storing in the 1st storage hopper 13 is for example 0.2～0.3 quality %.
The dissolved oxygen concentration of the powder body of storing in the 1st storage hopper 13 again, is for example 250～1000ppm.
Then, for the powder body is carried out drying, relief valve 24 cuts out drying drum blower fan 19 work that make in the 1st warm-air supply portion 12.And, also can suitably relief valve 24 be switched to the side towards atmosphere, let extraneous gas get into the 1st warm-air supply portion 12.
So, after the air-flow heater via 21 that drying drum blower fan 19 takes place is heated to for example 80 ℃ (the 1st temperature), is blown into the 1st from nozzle 22 and stores in the hopper 13.And, be blown into the 1st store in the hopper 13 air-flow to the 1st store powder bodies in the hopper 13 heat it is carried out drying after, from the 1st store hopper 13 the upper end through pipeloop 20, air blast 19 attractions once more are dried.
Like this, storing hopper 13 interior temperature with the 1st is that benchmark is adjusted to for example 70～80 ℃ with the 1st temperature.
At this moment; Because the nozzle 22 of the 1st warm-air supply portion 12 is configured in the 1st and stores near the bottom of hopper 13; Therefore the temperature in the 1st storage hopper 13 is roughly suitable in the bottom and the 1st temperature of the 1st storage hopper 13, and past upper end is departed from the 1st temperature and descended.That is to say that the 1st stores hopper 13 interior temperature exists the bottom temperature deviation higher than upper end temperature.
And, for dry, store 13 pairs of powder bodies of hopper the 1st and carry out for example 1～24 hour dried the powder soma.
Through such dried, the moisture that comprises in the powder body is for example 0.1 quality %.
Here, for the powder body is carried out drying, store 13 pairs of powder bodies of hopper the 1st and carry out between dry period, store hopper 33 interior temperature with the 2nd and adjust, storing hopper 33 interior air displacement with the 2nd simultaneously is nitrogen (example of non-active gas).
For temperature adjustment and the nitrogen displacement of implementing the 2nd storage hopper 33, at first relief valve 44 cuts out and makes 39 work of drying drum blower fan in the 2nd warm-air supply portion 32.
So, the air-flow heater via 41 that drying drum blower fan 39 takes place be heated to above the 2nd temperature of the 1st temperature, for example the 1st temperature 100～150%, specifically be heated to 100 ℃ after, be blown into the 2nd from nozzle 42 and store in the hopper 33.And, be blown into the 2nd store air-flows in the hopper 33 and store powder bodies in the hopper 33 and carry out heat drying the 2nd after, from the 2nd store hopper 33 the upper end attracted to drying drum blower fan 39 once more through pipeloop 40.
Then, implement temperature adjustment and nitrogen displacement, make air compressor machine 46 and nitrogen generator unit 45 work in order to store hopper 33 to the 2nd.
So; Nitrogen takes place by nitrogen generator unit 45; 47 pairs the 2nd warm-air supply portions 32 provide nitrogen through the nitrogen supply pipeline, and the nitrogen that offers the 2nd warm-air supply portion 32 is provided for the 2nd by drying drum blower fan 39 through warm-air supply pipeline 38 and stores hopper 33, is full of the 2nd and stores hopper 33.
Like this, storing hopper 33 interior air displacement with the 2nd is nitrogen.Nitrogen concentration in the 2nd storage hopper 33 of process nitrogen displacement is for for example more than 80%, preferably more than 90%.
Again, the temperature in the 2nd storage hopper 33 are benchmark with the 2nd temperature, are adjusted into for example 90～100 ℃.
Then,, make after transfer valve 63 switched to the 2nd position from the 1st position and carry air blast 62 work, open the outlet 17 of the 1st reservoir 11 for the powder body is carried out drying.And the outlet 37 of the 2nd reservoir 31 closed.
So, rely on and to store hopper 13 from the 1st and flow to the air-flow of the 2nd charging hopper 35 through feed-line 51, will the 1st store hopper 13 dried the powder body be transported to the 2nd charging hopper 35.The powder body of carrying to the 2nd charging hopper 35 is discharged to the 2nd storage hopper 33.
Like this, the 2nd store hopper 33 store littler than the 1st quality, for example 10～90% of the 1st quality, specifically, the powder body of 10kg (example of the 2nd quality).
And after the 2nd storage hopper 33 had been stored the powder body of the 2nd quality, the outlet 17 of the 1st reservoir 11 was closed.Thereafter, the powder body in the feed-line 51 carries air blast 62 to quit work after all delivering to the 2nd storage hopper 33.
And the powder body that does not remain in the 1st storage hopper 13 to 33 conveyings of the 2nd storage hopper continues in the 1st storage hopper 13, to carry out drying with the 1st temperature.That is to say that the powder body of next time carrying is long in the dried time of the 2nd drying section 4 at the dried time ratio of the 1st drying section 3.
Again, store hopper 13 from the 1st and store the powder body of hopper 33 carrying to the 2nd, and store hopper 13 from the 1st and contact to the 2nd charging hopper 35 airflow flowing, so sometimes can absorb the moisture that comprises in this air-flow through feed-line 51.
Therefore, the moisture that comprises in the powder body of storing in the 2nd storage hopper 33 is for example 0.05～0.08 quality %.
The dissolved oxygen concentration of the powder body of storing in the 2nd storage hopper 33 again, is for example 25～400ppm.
Then, the 2nd store hopper 33 with than the 1st store hopper 13 short drying time of drying time the powder body is carried out drying, for example the 1st store hopper 13 drying time 10～90%, specifically, 60 minutes drying.
Like this, the moisture that comprises in the powder body is the numerical value below the desired value, for example 0.08 quality %.
Again, the dissolved oxygen concentration in the powder body is for for example below the 400ppm.
Like this, accomplished the dried of powder body.
Then, the outlet 37, the 2 of opening the 2nd reservoir 31 is stored the powder body that being dried in the hoppers 33 handle and is relied on deadweight, falls through supply pipeline 71, is provided for make-up machine 2, fusion in make-up machine 2, moulding.
If adopt this drying system 1, as shown in Figure 1, the 2nd stores hopper 33 is set on the make-up machine 2, and the 2nd stores hopper 33 interior powder bodies carries out drying with the 2nd temperature that is higher than the 1st temperature under nitrogen environment, rely on gravity to offer make-up machine 2.
Therefore; Even store hopper 13 during the 2nd storage hopper 33 is carried from the 1st; The powder body contacts with feed-line 51 interior gases; Moisture that adheres on the powder body and oxidizing gas (for example oxygen, nitric oxide etc.) increase, also can be on make-up machine 2 the 2nd the powder body is carried out drying when storing in the hopper 33 with nitrogen replacement.
Like this, from the 1st store hopper 13 to the 2nd store hopper 33 and carry during, even the powder body contacts with gases in the feed-line 51, also can reduce moisture and the oxidizing gas that adheres on the powder body before being about to offer make-up machine 2.
Again, the 2nd storage hopper 33 to the 1 storage hoppers 13 volumes are little.
Therefore; Can be before being about to offer make-up machine 2 to the 1st store the powder body of storing in the hopper 13 a part in less the 2nd the storing in the hopper 33 expeditiously (with the shorter time) and carry out drying of volumetric ratio, can be with higher the 2nd temperature shortening powder body heat time heating time.
As a result, can prevent that the powder body of heating in make-up machine 2 is rotten, suppress the flavescence of moulding article.
If adopt this drying system 1, with the 2nd temperature that is higher than the 1st temperature the powder body in the 2nd storage hopper 33 is carried out drying at the 2nd drying section 4 again.
Therefore; Can carry out drying and suppress the flavescence of powder body the powder body with the 1st relatively low temperature at the 1st drying section 3; To powder body, expeditiously the powder body is carried out drying with the 2nd higher relatively temperature at the 2nd drying section 4 in the 1st drying section 3 dried.
Can when suppressing the flavescence of powder body, carry out drying expeditiously like this.
If adopt this drying system 1, compare long in the drying time of the 2nd drying section 4 in the drying time of the 1st drying section 3 again.
Therefore, carry out the 2nd dry drying section 4 with the 2nd higher relatively temperature, can reduce the drying time of powder body.
Therefore can suppress the flavescence of powder body better.
Again, if adopt this drying system 1, the 1 to store hopper 13 interior temperature doing, is benchmark with the 1st temperature, and the temperature of bottom is more higher relatively than the temperature of upper end, has temperature deviation.
Therefore, the powder body the 1st store in the hopper 13 along with from above mobile downwards, degree of drying is become better and better.Be about to store processings that farthest be dried of powder body that hopper 33 carries to the 2nd, can the powder body of such dried be transported to the 2nd storage hopper 33.
As a result, can shorten at the 2nd drying section 4 and carry out the dry time, suppress the flavescence of powder body better.
Again, if adopt this drying system 1, storing hopper 13 from the 1st can residual powder body in feed-line 51 when the 2nd stores hopper 33 conveying powder bodies.
Therefore, can prevent to remain in the powder body moisture absorption in the feed-line 51, the powder body that making is dried in the 1st storage hopper 13 handles is kept its drying regime and is stored hopper 33 conveyings to the 2nd.
As a result, can further suppress the flavescence of powder body the drying time that can avoid prolonging at the 2nd drying section 4.
If adopt this drying means, when can suppress the flavescence of powder body the powder body is carried out drying, and expeditiously the powder body is carried out drying with the 2nd higher relatively temperature with the 1st relatively low temperature again.
When as a result, can suppress the flavescence of powder body it is carried out dried expeditiously.
Claims (6)
1. drying system is that the powder body is carried out after the drying its drying system that offers make-up machine is characterized in that possessing
Have the 1st container of storing the powder body, will the powder body in said the 1st container under the 1st temperature carry out drying the 1st drying section,
It is littler than said the 1st vessel volume to have formation, is arranged on the 2nd container on the said make-up machine, with the 2nd temperature that is higher than said the 1st temperature with the powder body in said the 2nd container carry out the 2nd dry drying section and
Be connected in said the 1st container and said the 2nd container, with the powder body from the delivery section of said the 1st container to said the 2nd container transport,
The air of replacing in said the 2nd container is a non-active gas,
Rely on gravity that the powder body in said the 2nd container is offered said make-up machine.
2. drying system according to claim 1 is characterized in that, said the 2nd drying section carries out drying with the 2nd temperature that is higher than said the 1st temperature with the powder body in said the 2nd container.
3. drying system according to claim 1 and 2 is characterized in that, the time ratio that carries out drying at said the 1st drying section is long in the time that said the 2nd drying section carries out drying.
4. according to each the described drying system in the claim 1～3, it is characterized in that,
Temperature in said the 1st container is a benchmark with said the 1st temperature, and the temperature that forms the bottom is relatively higher than the deviation of the temperature of upper end,
Said delivery section from the bottom of said the 1st container to said the 2nd container transport powder body.
5. according to each the described drying system in the claim 1～4, it is characterized in that, said delivery section from said the 1st container to said the 2nd container transport powder body, and the not residual powder body in said delivery section its inside except that time of delivery.
6. a drying means is characterized in that, comprises
Under the 1st temperature with the powder body of the 1st quality carry out dry operation and
To carry out drying less than the powder body of the 2nd quality of said the 1st quality with the 2nd temperature that is higher than said the 1st temperature, the moisture that contains in the powder body will be reduced to the operation below the desired value.
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| Application Number | Priority Date | Filing Date | Title |
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| JP2011-045912 | 2011-03-03 | ||
| JP2011045912A JP2012180999A (en) | 2011-03-03 | 2011-03-03 | Drying system and drying method |
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| JP2015030191A (en) * | 2013-08-02 | 2015-02-16 | 株式会社カワタ | Treatment apparatus of powder and granular material |
| JP6567879B2 (en) * | 2014-07-01 | 2019-08-28 | 株式会社カワタ | Molding material pre-processing method, pre-processing apparatus, and injection molding method |
| JP2015127143A (en) * | 2015-01-30 | 2015-07-09 | 株式会社カワタ | Granule treatment method |
| CN105972949A (en) * | 2016-06-30 | 2016-09-28 | 广东拓斯达科技股份有限公司 | Circular dehumidification drying system |
| JP7083499B2 (en) * | 2019-02-22 | 2022-06-13 | 株式会社ハーモ | Molded product take-out device |
| JP7268852B2 (en) * | 2019-05-08 | 2023-05-08 | 株式会社松井製作所 | Drying system and drying method |
| JP7216434B2 (en) * | 2020-12-10 | 2023-02-01 | 株式会社ハーモ | Molded product take-out device |
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| CN2601163Y (en) * | 2003-01-06 | 2004-01-28 | 徐均佑 | Stepped temp difference dryer |
| CN101733860A (en) * | 2008-11-04 | 2010-06-16 | 株式会社川田 | Powder drying method and powder drying device |
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| JPS62201204A (en) * | 1986-03-01 | 1987-09-04 | Konishiroku Photo Ind Co Ltd | Manufacture of thermoplastic resin sheet and device thereof |
| JPH02217777A (en) * | 1989-02-17 | 1990-08-30 | Ube Ind Ltd | Method and device for drying granular body |
| JP3887955B2 (en) * | 1998-06-29 | 2007-02-28 | ソニー株式会社 | Supplying resin pellets to resin molding machines |
| JP2001269932A (en) * | 2000-03-28 | 2001-10-02 | Olympus Optical Co Ltd | Apparatus to feed resin material into molding machine |
| JP4674954B2 (en) * | 2000-11-10 | 2011-04-20 | 中村科学工業株式会社 | Drying equipment for granular plastic materials |
| JP2002144336A (en) * | 2000-11-14 | 2002-05-21 | Hama Seisakusho:Kk | Dryer |
| ITPD20040037A1 (en) * | 2004-02-16 | 2004-05-16 | Plastic Systems Srl | DEHUMIDIFICATION AND INJECTION AND MOLDING PROCESS OF PLASTIC MATERIALS IN GRANULES AND PLANT PREPARED TO OPERATE ACCORDING TO SUCH PROCESS |
| JP4500286B2 (en) * | 2006-04-10 | 2010-07-14 | 高木産業株式会社 | Resin drying method |
| JP5750210B2 (en) * | 2008-11-06 | 2015-07-15 | パーパス株式会社 | Resin drying method, apparatus and resin drying system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2601163Y (en) * | 2003-01-06 | 2004-01-28 | 徐均佑 | Stepped temp difference dryer |
| CN101733860A (en) * | 2008-11-04 | 2010-06-16 | 株式会社川田 | Powder drying method and powder drying device |
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Application publication date: 20120905 |