JPS5829644A - Air deflation pushing by twin-screw extruder - Google Patents

Abstract

PURPOSE:To increase the amount of extrusion by reducing the relative speed between powder and air by discharging air contained in fine powder from a discharge port provided in a specific downstream area of a fine powder supply port. CONSTITUTION:An air deflation opening 5 located on the downstream side of a raw material supply port 4 is provided inside the barrel 2 of a twin-screw extruder 1 in which screws 3 turns in the same direction in a mutually engaged manner. In the screws 3, a mixing element 7 to melt and mix raw materials supplied is provided between a raw material supply port 4 and the air deflation opening 5. Before reaching the air deflation opening 5, plastic materials are melted to a certain extent.

Description

[Detailed Description of the Invention] Concerning the four-way In1 transfer extrusion of the Fuei Akira 1 degree At- to 4-way In 1 turn extrusion, 1 ton per barrel from the raw material supply port of the same extrusion
1) Relating to a method for extruding air containing air.

Extrusion of plastic materials containing a large amount of fine powder resin or similar inorganic fine powder with a small apparent specific gravity has traditionally been carried out.
When ist-forming, the amount of feed into the original XSI θ) in the extruder supply section often limits the extrusion amount.

It is well known to use, for example, a forced feeding device (compactor) as a means of solving this problem. However, even if a compactor is used, very fine particles of VC will be produced.
The effect is complete with easy-to-clean powders (without effort ￥1θ)
The amount of extrusion can be reduced by f! l! , I# L, <It was only possible to operate under a limited range of extrusion conditions.

The biggest factor preventing the powder from being bitten into the '-It feeding section is the small apparent ratio J σ) A material containing a large amount of air is extruded. It is compressed in the four ridges and the air is separated, and the air causes hopper side noise, that is, it flows in the opposite direction to the direction of movement of the material, resulting in fine powder in the barrel. Body is fluid j, I
This is because η and 7:C. Therefore, the material θ) appearance)
The compression ratio is smaller, and the compression caused by the screw of Ic powder is less likely to occur, resulting in the original +72r of the screw.
171 transportation volume will decrease. Even in the case of θ〕 from the barrel, the material is heated and melted by the heat, and combined with the cutting of the screw by the screw, the material is melted in the compression bath (1
Go? -r1°-r1 The extrusion effect is lost, /f, but
Press 11) Compress the material, which is one layer of 1-goku rice, and press (-
Mechanical r'sfJ intermittent heat generation 1 stomach.

The present invention solves this problem by a method (for extruding the air contained in the coating powder θ), which eliminates the flow of trapped air to the supply port and provides a discharge outlet downstream of the supply port. 11+ The relative velocity of the powder and air is lost by releasing the powder from the opening, resulting in a fluidized state (conventional method by extruding without C)
'M1t, before it was considered as a point: Ida 111 problems improved 1
~One-largest extrusion meter? A new push 11 aimed at ending
There are 4 ways.

Next, 1':X according to the present invention is 11 cases care JJ, 1 figure π
, 1: After visiting 1, 1 Q Enil 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 This is an air vent opening 1 located downstream of the raw material feeder 110. 6 is a vent hole.The screw 3 has a kneading element 7 for melting and kneading the supplied raw materials. The supply port 4 and the air vent opening 1" are provided in the section 5. 11'5! The materials to be handled are classified according to the person and the following 24 types M: 1'l are considered, Jl
, 1) When the powder 4A', 1') is plastic, Q or other θ) organic material.

2) When the political body is mixed with plastic material and the water is mixed.

It is.

The former Z-Ma imitation body material is in an unmelted state θ) Tsuchimata air bleed 1
jibIrl 'When it reaches IS, it is compressed to some extent and becomes fluid]I''I1. The air of disguise and training heat &
'f, since the air vent opening is suddenly opened, it is easier to blow one blow from the air vent opening I3.

The latter is a phenomenon in which the plastic material is unmelted and not mixed with inorganic matter and light (J), and the unmolten plastic material reaches the air intake hole opening (σ), similar to the phenomenon described in Ijn. This caused the inorganic powder (similar to the former one) to blow up from the opening.

In this case, the proboscis body is the first θ) and the plastic material inside the barrel is vulgar fA'l! Condition 1. Q
:, θ) Even if a vent opening is provided in the castle, the air θ
] Tsuno, I was able to get +111 by getting 11 minutes,
C.

The air θ) was separated and discharged, and the plastic A'4
' , 4'lwo; e) 7° V fusion shape 弗 and saze 71' [
Ge)1. is lr "]. Therefore, the front side 3 (1 by 71)
; Conflict [Book/J) Plastic + gtlθ) 1 easy combination (
Process 1: Melt the tamutai a) Danuri) Knead 'nomoto 7 to cool 1 11it: +Tl'i'7 From n4, make a film;
Between part 5 and part 5, the powder is IJ.
? , Flame 1 No. 18 ≧ 1.0) (・Ma, Plastic A
A: Foil cap (with f (C' + 7! η to mix the imitation powder with a certain culm, θ)) Mixed offshore element 7/Ba same as 11
1 [Un'1 supply "14 air 1 friend IJ110 part 50 must have /[ro. takashi kokote 11r f) T, r
Koto fj niskuri, :1- :3 Vcfr'i? A
'lt or /47; Use element 7 for A east, but plastic LIi... 1/I Provide a connecting area and create a strong j mouth part 75, c-fi-pressure wave on A゛#;i
A! It must be possible to carry out kneading or kneading. Otherwise, the air will not reach the [;old] section and will flow back into the raw material/gas supply port.

In the present invention, the compressed part refers to the part where the screw is heated to a large extent. As a result, the material partially expands, causing the screw 3θ) groove to become densely heated1.
- If so, shake such a part with a compression part and a copy knife.

Therefore, the material in the barrel 2 is not completely heated, and the gas flows from the air vent opening 5 toward the second stream. The screw shape for effectively accomplishing this is well known to excavators. In the same direction lOJ rotary intermeshing type
11. Pitch P as shown by arrows 3a and 7 in FIG.
This is done by changing f. ``This'': Regarding the multi-feeding ability of Umono, Q Engineering, for example, refer to the literature An Analysis.
of the CoveyingCharacter
is-tics of Twin-8crew Co-
Rotating Extruders, shown in FIG. 14. L (1, transport J in proportion to the filling rate ε of paulownia wood in the screw premises, 'IQ1111 large I-1 same 11te 1f, co as the angle φ of the screw
sφ Ni 11'', as usual, here in the screw 1i
Between the opening 5 and the supply 1].
In order to prevent this gas flow from being sealed, the above-mentioned light d, i, Let's make the i rate ε Puno i1 or less 7xφ
-r) 1 ba J 2 ii. Furthermore, even if the groove depth changes, it is possible to calculate the transport value in the same manner so that the tr#4 ratio is 1.

Incidentally, the amount of 1 trade in the above literature is melting (I asked about the body, but even if there is some solid material, it is full A:'a rate r(("Tsuki(
1)', :Q hc4 can also be handled.

In the above explanation, it should be noted that the plastic 9 extrusion is carried out in 1 throw, and 1 extrusion (in the hole in Figure 1, raw material supply port 4 → Screw 3 a-) mixed 7-speed element 7 1'J solar heat or glue 1 from screw 3 if +11M of +11M <11 difference (Y, barrel 2 or ")"
j 11'T force J', filtration 14t] The width increases due to heat generation'f, c, etc., and as a result, the pores contain powder of 1 to 1, moisture in the internal pores, and 1 m of gas. Stone powder granule 1c
In other cases, since the bulk specific gravity increases, the container transport meter becomes larger, and with the same screw size, the filling rate becomes εmi1, which may lead to a blocked state.

Even in this condition, the air vent opening 5 and the supply port 4
Cut out the part to be painted so as not to cause any blockage between the parts 1
It is easy for the person concerned to select the loading depth h and pitch P of the screw so that . Also, the same direction lr for crosstalk in the document Plastic Age 77-2.870! As described in the structure of J-transforming shaft-transferring-shaft extruder 1) and %1, in an extruder with a structure in which screw elements are assembled with different screw pitches, the part that actually closes is This can also be achieved by replacing the screw elements with ones with larger pitches f and c.

In the twin-screw extruder VC, the gas flow is sealed with a glass material at the opening g35 and the supply port 4 in the section 11.
-Sti,'r,cThe external dimensions are significantly smaller than the one-person setting of the small screw shape or such 'IIc operating conditions due to cross-circuit conditions and other extrusion conditions that are originally difficult for the extruder. In other words, it is difficult to set up a difficult (possible to implement, retraction), and if we were to reduce the pressure at the air vent opening to the same level as a vent, the ratio would rise. Since there is no raw material supply port and one to one ridge powder is sucked in Vc] Ifj' + % vent is Komachi a', the present invention is the 11 neck of the glass material, After inserting the plowed screw into the groove #1, you can set the opening at the correct position to allow the air inside the barrel to naturally drain out.

Next, in accordance with the present invention, J:RO Implementation Regulations' below 21<'ij
.

Example 1゜Extruder: Toshiba Machine Co., Ltd. 1 zigzag mold same direction 1ρII+
Yunjisuke extrusion, type TEM-blade screw diameter 53φ
Vl, shadow ratio (75!t%) (15, 41, +1
1. ) 0.05 ) Polymer and powder powder were simultaneously dropped into the supply port of the extruder (9) using separate fixed stitch feeding devices.

Results: (INO: Maximum extrusion amount when there is no air vent opening - Vinegar 90 Ky/T) (b) When an air vent opening is provided, the maximum extrusion amount is 1.
75 K9/H Izune, screw rotation speed 60 Or, p, m Execution 1 row 2 Extruder: Manufactured by Toshiba Machine, meshing 1w co-rotating two-car extrusion rock, type TEM-100 screw diameter 94φ original old, Styrene-based 2-powder 10% absorbent powder (50 weight
; T section) (50 weight - 1 width) Isune also passed 200 mesh, pre-blended product (child shadow specific gravity 0.5) 816° Result: (Ij No air vent opening Kidai extrusion 1
Juice 30oK9/rx (mouth j with air vent opening, 1 pupil size Pf1 output fii
750 IFQ /lI Screw rotation part 300 r, p, m Is it the result of the above?
1:1 extrudability (higher extrudability than conventional technology)
/, C'I'i'i Ha"9 171, about twice the extrusion amount, ").

Also Haramari To π, [Tsute 9 Maso Jl, 1 So, Hi effect-
h＜lυ1 Samurai can do it.

4 (Explanation of Fig.
Diagram (Explanatory diagram of Nisfuryu.

2... Barrel, 3... Screw, 4 ・Hara 71 (i"
pq71m, 5...Empty 'λ removal opening part, output IQn person Toshiba Tawara Machinery J 6th issue (1]) Ne 1 jz f'21,1

Claims (1)

[Claims] downstream 0) barrel π front r+r +g(・
1cc included < 7) Provide an opening [] part for air/air to come out at 111・', I Iyp J So, and
．． 111. The sleeve opening and the opening θ) 4", 1.1 pieces if
1' (I, 1-<C kunri deficiency゛〃 to make Q engineering kun line
In the song, the material is C・
ζ Light Tj4 L Stone (Iyo, YLcL, don't you want to extract air of color amount J from the material through the opening j%?
The air factor of the attack body material fil in I-san and 1-ro is the way it appears.