CN206124170U - Supplementary reinforced structure of extruder - Google Patents

Abstract

The utility model belongs to the technical field of the plastic is moulded plastics, a supplementary reinforced structure of extruder is related to, including first extruder, first extruder has the first blowing that is located the top and fights and connect the first feed cylinder that first blowing was fought and is exported down, it lies in still to be equipped with one on the first extruder vice hopper on one side of first blowing is fought, the exit linkage of vice hopper in the middle part of first feed cylinder. The utility model discloses the agent of messenger's opening makes the opening agent more even dispersively in PET in the middle of adding fused PET from the middle part of feed cylinder.

Description

Extruder aids in feeding structure

Technical field

This utility model is related to plastic-injection technical field, more particularly to a kind of opening agent mixing uniformity that can improve Extruder aids in feeding structure.

Background technology

PET (Polyethylene terephthalate, polyethylene terephthalate) is common one in life Resin is planted, is exchanged with glycol ester by dimethyl terephthalate (DMT) or is first synthesized to benzene two with p-phthalic acid and ethylene glycol esterification The double hydroxyl ethyl esters of formic acid, then carry out again polycondensation reaction and are obtained.PET belongs to crystal type saturated polyester, is milky or light yellow, height The polymer of crystallization, surface smooths glossy.PET has excellent physical and mechanical propertiess within the scope of wider temperature, for a long time Using temperature up to 120 DEG C, electrical insulating property is excellent, or even under high-temperature high-frequency, its electrical property still preferably, but corona resistance compared with Difference, creep resistance, fatigue durability, rub resistance, dimensional stability are all fine.

Client needs that sheet material is used on some packages, and relatively low frictional resistance, institute are needed in transportation To have higher requirement to outward appearance and slippery, it is therefore desirable to add opening agent in the cladding material of sheet material.But enter extrusion The PET of machine is granulate material, and opening agent is but powder, if uniform mixing cannot be realized at all while adding from drain hopper, So the product surface quality of extrusion molding also can be very unstable, and customer requirement cannot be met at all.

Therefore, it is necessary to provide a kind of new technology to solve the above problems.

Utility model content

Main purpose of the present utility model is to provide a kind of extruder auxiliary that can improve opening agent mixing uniformity Feeding structure.

This utility model is achieved through the following technical solutions above-mentioned purpose：A kind of extruder auxiliary feeding structure, including the One extruder, first extruder has the exported under the first drain hopper above and connection first drain hopper One barrel；A secondary hopper for being located at the first drain hopper side is additionally provided with first extruder, the secondary hopper Outlet is connected to the middle part of first barrel.

Specifically, the first screw rod for pushing material in first barrel is provided with first barrel.

Further, it is additionally provided with an impeller in the outlet of the secondary hopper.

Further, the bottom of first drain hopper is provided with the first inlet chamber and toward the first air inlet intracavity supply First air inlet pipe, first inlet chamber is connected with first drain hopper inner side by some gas holes.

Using above-mentioned technical proposal, the beneficial effect of technical solutions of the utility model is：

1st, this utility model enables opening agent from the middle of the PET that the middle part of barrel adds melting, opening agent is divided in PET Scatteredly evenly；

2nd, impeller can control the addition speed of opening agent, just can make as long as adjusting the rotating speed of impeller and the first screw rod PET and opening agent mixed with more fixed ratio, it is ensured that product quality is stablized；

3rd, drain hopper is provided with drying materials structure, prevents fused materials internal generation after shaping because of the presence of moisture It is bad.

Description of the drawings

Fig. 1 is the structural representation of the compound plate forming devices of PET；

Fig. 2 is the structural representation of the first extruder；

Fig. 3 is the structural representation of the second extruder；

Fig. 4 is the production principle figure of PET composite plates.

Numeral is represented in figure：

The extruders of 1- first,

The drain hoppers of 11- first,

The inlet chambers of 111- first,

The air inlet pipe of 112- first,

The barrels of 12- first,

The screw rods of 13- first,

14- pair hoppers,

141- impellers；

The extruders of 2- second,

The drain hoppers of 21- second,

The inlet chambers of 211- second,

The air inlet pipe of 212- second,

The barrels of 22- second,

The screw rods of 23- second；

3- coextruding dies,

Runner in 31-,

The side runners of 32- first,

The side runners of 33- second.

Specific embodiment

This utility model is described in further detail with reference to specific embodiment.

As shown in Figures 1 to 4, a kind of compound plate forming devices of PET of the present utility model, including the first extruder 1, second Extruder 2 and coextruding die 3；First extruder 1 has the first drain hopper 11 above, the 11 times outlets of the first drain hopper of connection The first barrel 12 and for push the first barrel 12 in material the first screw rod 13；Second extruder 2 has above Second drain hopper 21, the second barrel 22 of the connection outlet of the second drain hopper 21 time and for the of material in the second barrel 22 of push Two screw rods 23；Coextruding die 3 includes middle runner 31 and the first side runner 32 and the second side runner 33 positioned at the both sides of middle runner 31, Middle runner 31 connects the second barrel 22 and exports, and the first side runner 32 and the second side runner 33 connect the first barrel 12 and export.First The material of the extrusion of extruder 1 is the mixture of PET and opening agent, and the material of the extrusion of the second extruder 2 is PET, and Jing second is extruded The PET of the extrusion of machine 2 can be extruded into middle material band, PET and the opening agent composition point of the extrusion of the first extruders of Jing 1 in middle runner 31 For two strands, outside material strip is extruded into from the first side runner 32 and the second side runner 33 respectively, middle material band is fitted in then Both sides, so be coextruded material strip directly be three ply board.It is concretionary because increased opening agent in the material strip of outside Plate surface can comparison be bright than seeming, and more smooth.

As shown in Figure 1 to Figure 3, the bottom of the first drain hopper 11 is provided with the first inlet chamber 111 and toward in the first inlet chamber 111 First air inlet pipe 112 of supply, the first inlet chamber 111 is connected by some gas holes with the inner side of the first drain hopper 11 and (not marked Note)；The bottom of the second drain hopper 21 is provided with the second inlet chamber 211 and the second air inlet pipe toward supply in the second inlet chamber 211 212, the second inlet chamber 211 is connected (do not mark) with the inner side of the second drain hopper 21 by some gas holes.The He of first drain hopper 11 Material in second drain hopper 21 can lean on air inlet pipe 112,212 to carry out steam supply.Because material is entered before extruder 1,2 All be cut into it is short grained, so the material grain that steam is blown in drain hopper 11,12 just can play a part of to dry moisture, it is to avoid molten After shaping internal generation is bad because of the presence of moisture to melt material.

As shown in Fig. 2 a secondary hopper 14 for being located at the side of the first drain hopper 11 is additionally provided with the first extruder 11, pair material The outlet of bucket 14 is connected to the middle part of the first barrel 12, and an impeller 141 is additionally provided with the outlet of secondary hopper 14.During work, PET is from One drain hopper 11 adds the first barrel 12 to be melted then, and the PET of melting is promoted by the first screw rod 13 and mixed while forward Conveying.Opening agent is added from secondary hopper 14, and is directly added to the interlude of the first barrel 12, in the first barrel 12 Opening agent will puddle in the middle of PET, melt while smashing mixing by the shearing force that the first screw rod 13 is produced, therefore open Mouthful agent in PET dispersedly evenly.Impeller 141 can control the addition speed of opening agent, as long as adjusting impeller 141 and The rotating speed of one screw rod 13 can just make PET and opening agent and be mixed with more fixed ratio, it is ensured that product quality is stablized.

As shown in figure 1, the barrel dliameter of the second barrel 22 is 2～3 times of the barrel dliameter of the first barrel 12.In actual production, because PET The outward appearance of composite plate essentially consists in the quality that two outside material strip outermosts show, the thickness of outside material strip corresponds to opening agent Dosage, in order to save opening agent cost, the thickness of outside material strip need not be very thick, and intermediate layer thickness probably can be outer layer thickness 8 times or so of summation, so can just make cost optimization, so the barrel dliameter of the second barrel 22 increases, to adapt to same rotational speed under it is former The supply ratio of material.

As shown in Figure 1 and Figure 4, the production stage of PET composite plates is：

1. the single raw materials of PET are added into the second drain hopper 21 and then are melted and clamp-on middle runner 31, during control temperature Degree is extruded as middle material band then at 260～300 DEG C；

2. PET is mixed with opening agent in the first extruder 1, Adding Way is added for PET from the first drain hopper 11, is opened Mouthful agent is added from secondary hopper 14, is adjusted and then is melted and clamp-ons the first side runner 32 and the second side runner 33, during control Temperature is extruded as two outside material strips and fits in the both sides of middle material band then at 260～300 DEG C；

3. three layered material bands are made to extrude while hardening by cooling forms PET composite plates；

4. the anterior waste material of excision after balanced condition is extruded, carries out collecting materials.

Wherein：Amount of PET in first extruder 1 accounts for 10～15wt% of total material amounts, in the second extruder 2 Amount of PET account for total material amounts for 85～90wt%, opening agent consumption is 0.3～0.4wt% of total material amounts, opening agent Dosage form be nanometer grade silica powder.

The different amounts ratio and condition of adjustment raw material, skin-friction coefficient is carried out to obtained PET composite plates and mist degree is surveyed Examination, and contrasted as reference examples using single PET sheet material, concrete outcome is shown in Table 1.

Table 1：

As shown in Table 1, with the PET composite plates of this technique productions compared with conventional PET sheet, coefficient of friction is lower, so more Plus it is smooth；Mist degree is lower, so brighter.

Above-described is only some embodiments of the present utility model.For the person of ordinary skill of the art, On the premise of design is created without departing from this utility model, some deformations and improvement can also be made, these belong to this practicality New protection domain.

Claims (4)

1. a kind of extruder aids in feeding structure, including the first extruder, first extruder to have above first The first barrel exported under drain hopper and connection first drain hopper；It is characterized in that：It is additionally provided with first extruder One secondary hopper for being located at the first drain hopper side, the outlet of the secondary hopper is connected to the middle part of first barrel.

2. extruder according to claim 1 aids in feeding structure, it is characterised in that：Be provided with first barrel for Push the first screw rod of material in first barrel.

3. extruder according to claim 2 aids in feeding structure, it is characterised in that：Also set in the outlet of the secondary hopper There is an impeller.

4. extruder according to claim 1 aids in feeding structure, it is characterised in that：The bottom of first drain hopper sets There are the first inlet chamber and the first air inlet pipe toward the first air inlet intracavity supply, first inlet chamber and first blowing Bucket inner side is connected by some gas holes.