CN205291524U

CN205291524U - Feeding device of fire -retardant XPS extrusion molding foaming board

Info

Publication number: CN205291524U
Application number: CN201520984616.7U
Authority: CN
Inventors: 赵祖良; 赵赶超
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-12-02
Filing date: 2015-12-02
Publication date: 2016-06-08
Anticipated expiration: 2025-12-02

Abstract

The utility model relates to a feeding device of fire -retardant XPS extrusion molding foaming board, it includes screw extruder (1), feeder hopper (2), first hopper (3), second hopper (4) and frequency conversion feeder (5) its characterized in that, feeder hopper (2) set up in screw extruder's (1) feed inlet department, the discharge gate of first hopper (3) bottom is located half part on the left side of feeder hopper (2) top, the discharge gate department of second hopper (4) bottom is connected with the feed inlet of frequency conversion feeder (5), and the discharging pipe road junction of frequency conversion feeder (5) is located into above the hopper's half part on the right side, wherein places in first hopper (3) PS aggregate (6), places fire retardant premix (7) in second hopper (4). Consequently the utility model has the advantages of product flame retardant efficiency is good, production simple process flexibility, production safety, with low costs.

Description

The drawing-in device of fire-retardant XPS extruded plastic foam plate

Technical field

The utility model relates to the drawing-in device of a kind of fire-retardant XPS extruded plastic foam plate.

Background technology

XPS extruded plastic foam plate (extruded polystyrene cystose) has the foaming structure of closed pore, and therefore thermal conductivity is little, has excellent heat-insulating property, the first-selection of various insulation construction, but XPS extruded plastic foam plate easily fires, fire a bit with, therefore fire retardant is added so that it is reach the object of difficult combustion. The compositional flame-retardant XPS extruded plastic foam such as expansible black lead, encapsulated red phosphorus can make foam material reach difficult combustion B1 level, alternative poisonous hexabromocyclododecane flame retardant.

Traditional production method adding fire retardant has two kinds:

The first production method is by TCPP and expansible black lead or adds red phosphorus etc. again and make pasty state, utilizes special pump to be injected in two grades of screw rods of foaming machine. Patent of invention: CN102990895. But TCPP is liquid, it is have certain ratio with the solid flame retardant such as expansible black lead composition pasty state fire retardant, pasty state fire retardant must be injected when wanting the flame retardant properties improving foam material more, owing to the TCPP in pasty state fire retardant is liquid, too much liquid injects and brings die pressure unstable by causing the electric current of the motor driving screw rod unstable, and die pressure shakiness can affect foaming forming technique. Therefore this method has limitation.

2nd kind is general method (Adding Way with reference to hexabromocyclododecane), is mixed with PS pellet by the solid flame retardant such as expansible black lead, encapsulated red phosphorus, adds feeding cylinder after mixing, and mixed material enters one-level screw rod through barrel. Though simply but can there are many problems in production in this kind of method:

1, owing to graphite, encapsulated red phosphorus are meal, PS is pellet, can they be mixed, and has a banking process when they can be sent into barrel, and in banking process, powder, grain can produce separation phenomenon. And when the material in barrel enters spiral shell cylinder it is a pile-up rejection process, also can produce separation phenomenon. So the material entered in spiral shell cylinder is uneven. The instability of device current can be caused and affect foaming. Owing to uneven meeting causes the instability of flame retardant properties.

2, encapsulated red phosphorus is inflammable substance, as two sample hard object collisions or friction just can be ignited, still can burn after mixing with graphite, PS pellet, one is there is a large amount of air in compound, two is that red phosphorus to be played fire retardation and must expect after abundant dispersing and mixing just useful with PS, as with the product of red phosphorus flame-retardant. PS pellet can not dispersing and mixing abundant with red phosphorus, so catching fire due to the friction of screw rod when in production, particularly material has just entered screw rod.

3, due to PS pellet with fire retardant quantitatively to mix, in production as to be increased and decreased fire retardant with regulate foaming forming technique or change flame retardant properties very inconvenient, it is necessary to after waiting the material in barrel to be finished again by increase and decrease fire retardant after material send into barrel. Technique lacks handiness.

Therefore it is badly in need of seeking a kind of product good flame retardation effect, production technique simple and flexible, production safety, the drawing-in device of fire-retardant XPS extruded plastic foam plate that cost is low and uses the production technique of the drawing-in device of this fire-retardant XPS extruded plastic foam plate.

Summary of the invention

The purpose of this utility model is to overcome above-mentioned deficiency, it is provided that the drawing-in device of the fire-retardant XPS extruded plastic foam plate that a kind of product good flame retardation effect, production technique simple and flexible, production safety, cost are low.

The purpose of this utility model is achieved in that

The drawing-in device of a kind of fire-retardant XPS extruded plastic foam plate, it comprises screw extrusion press, hopper, the first hopper, the 2nd hopper and frequency conversion feeder, described hopper is arranged at the spout place of screw extrusion press, the discharge port of described first feed hopper bottom is positioned at the left-half above hopper, the described discharge outlet of the 2nd feed hopper bottom is connected with the opening for feed of frequency conversion feeder, the discharge pipe mouth of frequency conversion feeder is positioned at the right-hand part above hopper and divides, wherein place PS pellet in the first hopper, in the 2nd hopper, place fire retardant Preblend.

Preferred as one, wherein the discharge pipe mouth of frequency conversion feeder and the discharge port of the first hopper are in same level.

Compared with prior art, the beneficial effects of the utility model are:

1, PS pellet and fire retardant Preblend are fed screw extrusion press respectively, the separation phenomenon of pellet and powder can be solved like this, although pellet and powder feed respectively, but they enter screw rod by the per-cent same time, they can be mixed through screw rod, can make that foaming machine operates steadily, foamed products flame retardant properties stablizes.

2, the TCPP of the PS feed liquid state of red phosphorus, graphite and powdery is mixed composition fire retardant Preblend, owing to being all powder and adding a certain amount of TCPP, so they can not be separated when joining in screw extrusion press. Owing to adding powdery PS in fire retardant Preblend, well can mix with the red phosphorus of powdery, like this when the red phosphorus at a place be collided or rub to the existence having a PS due to side during incendivity in fact red phosphorus now become fire retardant (fire retardant Preblend now can be considered by the product of red phosphorus flame-retardant), so fire retardant Preblend it can not burn. Adding of TCPP can make the more abundant of mixing of materials powder can be made not float simultaneously.

Therefore the utility model has product good flame retardation effect, production technique simple and flexible, production safety, advantage that cost is low.

Accompanying drawing explanation

Fig. 1 is the structural representation of the drawing-in device of the fire-retardant XPS extruded plastic foam plate of the utility model.

Wherein:

Screw extrusion press 1, hopper 2, first hopper 3, the 2nd hopper 4, frequency conversion feeder 5, PS pellet 6, fire retardant Preblend 7.

Embodiment

See Fig. 1, the drawing-in device of a kind of fire-retardant XPS extruded plastic foam plate that the utility model relates to, it comprises screw extrusion press 1(one-level screw rod), hopper 2, first hopper 3, the 2nd hopper 4 and frequency conversion feeder 5, described hopper 2 is arranged at the spout place of screw extrusion press 1, discharge port bottom described first hopper 3 is positioned at the left-half above hopper 2, discharge outlet bottom described 2nd hopper 4 is connected with the opening for feed of frequency conversion feeder 5, and the discharge pipe mouth of frequency conversion feeder 5 is positioned at the right-hand part above hopper and divides. Wherein the discharge pipe mouth of frequency conversion feeder 5 and the discharge port of the first hopper 3 are preferably in same level. Wherein place PS pellet 6 in the first hopper 3, place fire retardant Preblend 7 in 2nd hopper 4, fire retardant Preblend 7 be 1 part, red phosphorus, expansible black lead (50 ~ 200 order) 0.5-3 part, PS powder 1-40 part, oxidation inhibitor (being preferably antioxidant 1010 or irgasfos 168) 0.01-0.2 part, TCPP(tricresyl phosphate (2-chloropropyl) ester) 0.01-0.5 part (how much determining to be as the criterion with material not conglomeration with material) is mixed into fire retardant Preblend 7 in amalgamator. TCPP in fire retardant Preblend 7 with other as machine oil, vegetables oil etc. substitute, but can not have fire retardation yet.

Principle of work:

If total material required in screw extrusion press 1 is m part, frequency conversion feeder 5 is not opened, then m part material is all supplied by the first hopper 3; If starting frequency conversion feeder 5, the fire retardant Preblend 7 of confession be a part, then remaining b(b=m-a) part expects by PS pellet 6 automatic makeup in the first hopper 3. The drawing-in device of this fire-retardant XPS extruded plastic foam plate the fire retardant Preblend 7 of confession be advisable to be no more than the 40% of total material. What utilize because of the drawing-in device of fire-retardant XPS extruded plastic foam plate for this reason is the stocking angle of spontaneous phenomenon and material, therefore frequency conversion feeder should not feed too much.

Method of work: fire retardant Preblend 7 be added in the 2nd hopper 4, is added in the first hopper 3 by PS pellet 6; The TCPP that getting out high-pressure pump (at two grades of screw rod places) needs can start streamline, just can not open frequency conversion feeder 5 during start, material required in screw extrusion press 1 is all supplied by the PS pellet 6 in the first hopper 3, by the time start to start frequency conversion feeder 5 when streamline (at two grades of screw rod places) starts to note whipping agent, at the beginning frequency open smaller less feed some fire retardant Preblend 7(do like this can save fire retardant), to foam start to be shaped time be progressively enlarged to required frequency.

This kind of feeding manner only need to regulate frequency conversion feeder variable, can debug out the maximum adding quantity of fire retardant Preblend, because the membership impact that too much adds of fire retardant Preblend is foamed, crosses and does not reach flame retardant effect at least. So when the fire retardant Preblend added by frequency conversion feeder has been foamed to impact, illustrates and add too many progressively reduce the frequency of frequency conversion feeder, until the fire retardant Preblend fed does not affect to foam can be considered the maximum adding quantity of fire retardant Preblend.

Embodiment one:

By 1 part, red phosphorus, expansible black lead 2 parts, PS powder 4 parts, 0.02 part, oxidation inhibitor, the composition fire retardant Preblend of TCPP0.03 part. When fire retardant Preblend and PS pellet are 3:7. In the fire-retardant XPS extruded plastic foam plate produced red phosphorus content be 4.28%, graphite be 8.57%, after injecting the TCPP of total material quality 2% on two grades of screw rods, the flame retardant resistance of fire-retardant XPS extruded plastic foam plate can reach B1 level.

Embodiment two:

By 1 part, red phosphorus, expansible black lead 2 parts, PS powder 4 parts, 0.02 part, oxidation inhibitor, the composition fire retardant Preblend of TCPP0.03 part. When fire retardant Preblend and PS pellet are 3.5:6.5. In the fire-retardant XPS extruded plastic foam plate produced red phosphorus content be 5%, graphite be 10%, after injecting the TCPP of total material quality 1% on two grades of screw rods, the flame retardant resistance of fire-retardant XPS extruded plastic foam plate can reach B1 level.

Embodiment three:

By 1 part, red phosphorus, expansible black lead 2 parts, PS powder 4 parts, 0.02 part, oxidation inhibitor, the composition fire retardant Preblend of TCPP0.03 part. When fire retardant Preblend and PS pellet are 4:6. In the fire-retardant XPS extruded plastic foam plate produced red phosphorus content be 5.71%, graphite be 11.43%, without the need to injecting TCPP on two grades of screw rods, the flame retardant resistance of fire-retardant XPS extruded plastic foam plate can reach B1 level.

Claims

1. the drawing-in device of a fire-retardant XPS extruded plastic foam plate, it is characterized in that it comprises screw extrusion press (1), hopper (2), first hopper (3), 2nd hopper (4) and frequency conversion feeder (5), described hopper (2) is arranged at the spout place of screw extrusion press (1), the discharge port of described first hopper (3) bottom is positioned at the left-half of hopper (2) top, the discharge outlet of described 2nd hopper (4) bottom is connected with the opening for feed of frequency conversion feeder (5), the discharge pipe mouth of frequency conversion feeder (5) is positioned at the right-hand part above hopper and divides, wherein place PS pellet (6) in the first hopper (3), fire retardant Preblend (7) is placed in 2nd hopper (4).

2. the drawing-in device of a kind of fire-retardant XPS extruded plastic foam plate according to claim 1, it is characterised in that wherein the discharge pipe mouth of frequency conversion feeder (5) and the discharge port of the first hopper (3) are in same level.