CN201332668Y

CN201332668Y - Double-screw expanding device of mould-front convergent flow

Info

Publication number: CN201332668Y
Application number: CNU2008202375435U
Authority: CN
Inventors: 刘雄伟; 肖巍; 糜长雨
Original assignee: Jiangsu Muyang Group Co Ltd
Current assignee: Jiangsu Muyang Group Co Ltd
Priority date: 2008-12-17
Filing date: 2008-12-17
Publication date: 2009-10-28
Anticipated expiration: 2018-12-17

Abstract

The utility model discloses a double-screw expanding device of mould-front convergent flow, belonging to the field of food and feed machinery. The device comprises an expanding cavity which is internally provided with a pair of screws which are coupled; the outlet end of the expanding cavity is connected with the inlet end of the convergent flow body; the center of the convergent flow body is provided with a material channel; the material channel is formed by connecting a channel which gradually contracts from the inlet end thereof and a channel which gradually diffuses toward the outlet end thereof; the outer end of the convergent flow body is also provided with a pressing ring which fixes a discharging template with a discharging hole with the convergent flow body relatively; the center of the discharging template is also fixed with a divergent flow body expanding the channel which gradually diffuses; the inlet end of the channel with gradual contraction takes the shape of '8' which is identical with the outlet end of the convergent flow body and contracts in the shape of '8' toward the central part of the convergent flow body gradually. The device leads the material flow to have even convergence in front of mould, and the quality of the formed material is good; and the device can be used for the expanding processing of food and feed.

Description

The twin-screw expanding apparatus that confluxes before a kind of mould

Technical field

The utility model relates to a kind of twin-screw expanding apparatus of food, feed manufacturing machine technical field, particularly a kind of twin-screw expanding apparatus that confluxes before mould.

Background technology

In the prior art, a kind of twin-screw expanding apparatus is arranged, it mainly includes Builking cavity, cooperate in the Builking cavity and be provided with a pair of screw rod that is coupled, the port of export of Builking cavity links to each other with the entrance point of the body that confluxes, the described body center of confluxing is provided with a material channel, this material channel is made of a conicylindrical passage and a passage that spreads gradually to its port of export that begins to shrink gradually from its entrance point, link to each other at the body middle part of confluxing between two passages, the external end that confluxes also is connected with hold-down ring, the material discharging mould that hold-down ring will have discharge opening fixes with the body that confluxes, and the material discharging mould center also is fixed with the branch fluid in the passage that stretches to described diffusion gradually.During its work, material is the extruding of the twin-screw through rotating in Builking cavity, enters the entrance point of the body that confluxes from the Builking cavity port of export, pass the body that confluxes again through a minute fluid shunting, discharge opening from the material discharging mould is extruded then, and the pressure of savings is released, and material is by expanded.Its weak point is: Builking cavity is the figure of eight with the shape that a pair of screw rod matches, material flow is after a pair of screw rod extruding, enter the conicylindrical passage that shrinks gradually, the entrance point of the conicylindrical passage that this shrinks gradually is rounded, the shape of this passage and the Builking cavity port of export is inconsistent, when two bursts of material flow enter a passage suddenly, cause and conflux inhomogeneously, be difficult to guarantee uniform quality behind the material forming.

For addressing the above problem, also make material flow enter two passages respectively, converge to a material discharging mould extrusion modling again, its same uneven situation of confluxing that exists also is difficult to guarantee uniformity behind the material forming.

Summary of the invention

The utility model provides the twin-screw that confluxes before a kind of mould expanding apparatus, makes material flow conflux before mould evenly, and the quality consistency behind the material forming is better.

For achieving the above object, the technical solution of the utility model is as follows: the twin-screw expanding apparatus that confluxes before a kind of mould, include Builking cavity, cooperate in the Builking cavity and be provided with a pair of screw rod that is coupled, the port of export of Builking cavity links to each other with the entrance point of the body that confluxes, the described body center of confluxing is provided with a material channel, this material channel is linked to each other with a passage that spreads gradually to its port of export by a passage that begins to shrink gradually from its entrance point and constitutes, the external end that confluxes also is provided with hold-down ring, hold-down ring will have the material discharging mould of discharge opening and the body relative fixed of confluxing, and the material discharging mould center also is fixed with the branch fluid in the passage that stretches to described diffusion gradually; The entrance point of the described passage that shrinks gradually is " 8 " word that the port of export with the body that confluxes matches, and shrinks to the body middle part of confluxing gradually with the figure of eight.

Fiber impacts the molding materials quality in the material in order to reduce, the installation that matches with the branch fluid of described hold-down ring and conflux and also be provided with spacer ring between the body, spacer ring and conflux orifice plate is installed between the body, orifice plate inner ring.Orifice plate can tangle the fiber in the material flow of passing, guarantee that the molding materials behind the material discharging mould is Paint Gloss, the section burr is few, the product lover, spacer ring makes and draws back certain distance between orifice plate and the material discharging mould, guarantees to hang over the quality that fiber on the orifice plate can not influence molding materials.

Can also relief frame be set between the passage of described passage that shrinks gradually and diffusion gradually in the utility model connects both transition, by changing the relief frame in different apertures, can change the pressure of material flow before entering the body that confluxes, adapt to the expanding processing requirement of different product.In addition, be the fixed installation of the body that conveniently confluxes, described Builking cavity can be connected with the fixed head transition between the body with confluxing.

Adopt this structural design of the utility model, in the device busy process, but material flow in the outlet smooth transition of Builking cavity in the body that confluxes, can not produce the sudden change of pressure at both binding sites, therefore, it confluxes evenly, and is also even relatively through the material flow after confluxing, and can guarantee that the quality consistency of the molding materials behind the extrusion die is better.Compared with prior art, this device can improve the quality of molding materials, and is very strong for expanding processing process applications such as food, feeds.

Description of drawings

Fig. 1 is the utility model structural representation;

Fig. 2 is that the A-A of Fig. 1 is to view.

The specific embodiment

Below in conjunction with accompanying drawing the specific embodiment of the present utility model is described in further detail.It only is typical exemplary applications, and protection domain of the present utility model is not constituted any limitation.

As depicted in figs. 1 and 2, the twin-screw expanding apparatus that confluxes before a kind of mould, include Builking cavity 11, cooperate in the Builking cavity 11 and be provided with a pair of screw rod 10 that is coupled, the port of export of Builking cavity 11 is connected with the body 8 that confluxes through fixed head 9 transition, the port of export of Builking cavity 11 links to each other with the entrance point of the body 8 that confluxes, body 8 centers of confluxing are provided with a material channel, this material channel is made of a passage 12 and a passage 13 that spreads gradually to its port of export that begins to shrink gradually from its entrance point, relief frame 2 transition between two passages in being fixed on the body 8 that confluxes connect, the entrance point of the described passage 12 that shrinks gradually is " 8 " word that the port of export with the body 8 that confluxes matches, and shrink to the middle part of the body 8 that confluxes gradually with the figure of eight, body 8 outer ends of confluxing also are connected with spacer ring 7 and hold-down ring 6, the material discharging mould 3 that hold-down ring 6 will have discharge opening 5 fixes with spacer ring 7, material discharging mould 3 centers also are fixed with the branch fluid 4 in the passage 13 that stretches to described diffusion gradually, spacer ring 7 and conflux orifice plate 1 is installed between the body 8, orifice plate 1 inner ring with divide fluid 4 installation that matches.

During its work, material is 10 extruding of the twin-screw through rotating in Builking cavity 11, steadily enter the entrance point of the body 8 that confluxes from Builking cavity 11 ports of export, pass the body 8 that confluxes again through 4 shuntings of minute fluid, discharge opening 5 from the material discharging mould 3 is extruded then, and the pressure of savings is released, and material is by expanded.By the relief frame 2 that changes different apertures, can change the pressure of material flow before entering the body 8 that confluxes, to adapt to the expanding processing of different product.The effect of spacer ring 7 is the spaces that increase between orifice plate 1 and the material discharging mould 3, makes by orifice plate 1 material flow time of staying lengthening before mould, and the slaking that more helps material is with even.Acting as of hold-down ring 6 compresses material discharging mould 3, makes material discharging mould 3 evenly stressed on circumference, and to guarantee the intensity of material discharging mould 3, the high pressure that produces when preventing to push breaks material discharging mould 3.Fiber in the material is filtered on orifice plate 1, and behind the material forming that guarantees to extrude by material discharging mould 3, particle cuts off easily, avoids the burr of particle section.

This twin-screw expanding apparatus of the utility model, it is more consistent to guarantee that the quality of moulding is passed through after the discharge opening 5 in materials flow.

Claims

1, the twin-screw expanding apparatus that confluxes before a kind of mould, include Builking cavity, cooperate in the Builking cavity and be provided with a pair of screw rod that is coupled, the port of export of Builking cavity links to each other with the entrance point of the body that confluxes, the described body center of confluxing is provided with a material channel, this material channel is linked to each other with a passage that spreads gradually to its port of export by a passage that begins to shrink gradually from its entrance point and constitutes, the external end that confluxes also is provided with hold-down ring, hold-down ring will have the material discharging mould of discharge opening and the body relative fixed of confluxing, and the material discharging mould center also is fixed with the branch fluid in the passage that stretches to described diffusion gradually; It is characterized in that: the entrance point of the described passage that shrinks gradually is " 8 " word that the port of export with the body that confluxes matches, and shrinks to the body middle part of confluxing gradually with the figure of eight.

2, the twin-screw expanding apparatus that confluxes before a kind of mould according to claim 1 is characterized in that: described hold-down ring and conflux and also be provided with spacer ring between the body, spacer ring and conflux orifice plate is installed between the body, the orifice plate inner ring with divide the fluid installation that matches.

3, the twin-screw expanding apparatus that confluxes before a kind of mould according to claim 1 and 2 is characterized in that: connect through the relief frame transition between the passage of described passage that shrinks gradually and diffusion gradually.

4, the twin-screw expanding apparatus that confluxes before a kind of mould according to claim 1 and 2 is characterized in that: described Builking cavity is connected through the fixed head transition between the body with confluxing.