CN2402467Y

CN2402467Y - Reciprocating extruder

Info

Publication number: CN2402467Y
Application number: CN99229982U
Authority: CN
Inventors: 孔祥明
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-11-15
Filing date: 1999-11-15
Publication date: 2000-10-25
Anticipated expiration: 2009-11-15

Abstract

The utility model relates to a reciprocating extruder, comprising a machine frame 9, a main motor 1, a reducer casing 2, a machine barrel 6, a screw rod 5 in the machine barrel, a swinging box 3 arranged on the front end of the screw rod, a main feed port 4 and a gear pump 7, wherein, the swinging box comprises a box body 17, a spindle 14, a swinging disc 16, a T-shaped bearing seat 21 and a spherical bearing 15; the bearing 15 on the swinging disc 16 is provided with the core thread of the spindle according to a certain angle alpha; the swinging disc 16 is fixed on the spindle 14. The screw rod of the utility model can move radially and can also reciprocate axially; so, the effects of the dispersion of pigments, the kneading of melt and the shearing of material are all good, and the energy consumption of the utility model is low.

Description

Move back and forth extruder

The utility model relates to a kind of reciprocating motion extruder, is used for the poly granulation of hard polyvinyl fluoride and plasticising.

Existing extruder generally is made up of frame, main motor, reduction box, machine barrel, screw rod, gear pump, main charge door etc.What its screw rod adopted is continuous single screw rod or twin-screw, because its screw thread is continuous, can only radial motion, and do not have axially-movable, and the mixing of its polymer occurs over just radially, so dispersing of pigments, the shear effect of the kneading material of melt is all not ideal.Simultaneously, because its screw thread is continuous, its pressure that acts on polymer is very big, and the energy consumption of relevant device also strengthens.

The purpose of this utility model is to provide a kind of screw rod can do radial motion, can make the reciprocating motion extruder of axially-movable again.

The purpose of this utility model is achieved in that a kind of reciprocating motion extruder, comprise main motor, reduction box, main charge door, screw rod, machine barrel, gear pump and frame, be characterized in that the screw front end device waves case, wave case and include casing, main shaft, swing disc, T profile shaft bearing and spherical bearing, the bearing on the swing disc and the shaft core line of main shaft are pressed dress by certain included angle α, swing disc is fixed on the main shaft, be connected with bearing about the T profile shaft bearing in the middle of the swing disc, the below is by sleeve supporting, and shaft sleeve device is on casing.Main shaft is driven by reduction box, and links to each other with screw rod.When main motor when the reduction box drive shaft is rotated, swing disc simultaneously because axially reciprocating is made in the effect of swing disc again, thereby makes the screw rod that is connected with main shaft with main axis rotation, the same generation radially rotated and axially reciprocating, and material is mixed and shearing.

Screw rod of the present utility model is made the discontinuous screw structure.

Compare with existing single screw rod or double screw extruder, the utility model since before screw rod, installed one can drive screw rod reciprocating wave case, and screw rod made the discontinuous screw structure, and make screw rod in rotation continuously, also make axially reciprocating according to certain rules.The mixing of its polymer is axially rather than occur in radially, makes the whole materials in the screw channel be subjected to uniform shear stress.So the kneading of dispersing of pigments, melt, the shear effect of material is all fine.Because screw rod has interrupted screw thread, and its pressure that acts on the polymer is very little, the corresponding apparatus energy consumption is also less simultaneously.

Fig. 1 is a general structure schematic diagram of the present utility model.

Fig. 2 is the left view of Fig. 1.

Fig. 3 is the box structure schematic diagram that waves of the present utility model.

Fig. 4 is machine barrel of the present utility model and screw rod mating part enlarged diagram.

Fig. 5 is the A-A cutaway view of Fig. 4.

Below in conjunction with accompanying drawing the utility model being done one describes in detail:

Shown in Fig. 1-2, a kind of reciprocating motion extruder, mainly by main motor 1, reduction box 2, wave that case 3, main charge door 4, side direction are reinforced 11, screw rod 5, machine barrel 6, gear pump 7, gear pump bracket 8, frame 9 and fuel tank 10 etc. form.

As Fig. 3, wave case 3 and form by casing 17, main shaft 14, swing disc 16, T profile shaft bearing 21, spherical bearing 15, axle sleeve 22, nut 19, sleeve 18,23, adjustment pad 13, attachment screw 12, flat key 20 etc.Bearing 15 on swing disc 16 steps is pressed dress with the shaft core line of main shaft by certain included angle α, is fastened on the main shaft 14 by flat key 20, nut 19.T profile shaft bearing about 21 in the middle of the swing disc 16 is connected with bearing 15, and the reciprocating stroke of main shaft 14 is accurately controlled by axle sleeve 22 supportings in the below.Axle sleeve 22 devices are on casing 17.When main motor 1 when reduction box 2 drive shaft 14 are rotated, swing disc 16 is made axially reciprocating again owing to shake the effect that stops dish 16 simultaneously, thereby is made the screw rod 5 that is connected with main shaft with main shaft 14 rotations, same generation radially turns to and axially reciprocating, and material is mixed and shearing.

As Fig. 4, the screw thread on the screw rod 5 is discontinuous, and screw thread whenever turns around and interrupts three times.As Fig. 5, machine barrel 6 is dissection types, and its inner surface has been installed three rows according to certain rules and mediated pin 24 as second screw rod, it has played the conveying to material, to the cleaning of spiral shell rib, material distributed and disperse mix, its immixture is axially but not radially take place.

The existence of mediating pin has influenced drag flow and pressure current.The revolution of screw rod and reciprocating motion make in the revolution each tooth ∞ shape track that draws.So whole machine barrel inner surfaces were all swept away by screw element.Bear continuously and the shearing of pulsation at the material of mediating between pin and the interrupted screw thread, its extrusion capacity is the sinusoidal wave shape fluctuation, and under very little flow rate, material mobile is actually interruption.

In screw channel.Mediate pin as a series of agitators,, make each component realize repeatedly distributing again via the mixing of crossing screw channel.Mediate the inswept interrupted screw thread of pin, material can not be detained.The kneading pin can cause certain axial backflow, thereby can eliminate the inhomogeneities (other screw rod class extruder mainly is an inhomogeneities of eliminating radial temperature and component) of axial temperature and component.Mediate pin certain additional fricting shearing surface is provided, partly remedied screw thread and be interrupted the minimizing on the fricting shearing surface of causing.

It disperses married operation to be different from other conventional mixing, and its mixing is axially rather than occurring in radially that mobile screw thread is fixing to be mediated between the pin.In addition, unlike single screw rod and double screw extruder.Whole materials in this machine screw channel are subjected to uniform shear stress, rather than have only a book layer material to be sheared.Because screw rod has interrupted screw thread, it is very little to pretend the pressure that is used on the polymer.

So in process of production, no matter be the kneading of dispersing of pigments, melt, or the shearing of material, can both produce gratifying effect.

Claims

1, a kind of reciprocating motion extruder, comprise frame (9), main motor (1), reduction box (2), machine barrel (6), screw rod (5) in the machine barrel, gear pump (7) and main charge door (4), it is characterized in that screw rod (5) fore device waves case (3), wave case (3) and include casing (17), main shaft (14), swing disc (16), T profile shaft bearing (21) and spherical bearing (15), bearing (15) on the swing disc (16) is pressed dress with the shaft core line of main shaft by certain angle [alpha], swing disc (16) is fixed on the main shaft (14), be connected with bearing (15) about the T profile shaft bearing (21) in the middle of the swing disc (16), the below is by axle sleeve (22) supporting, and axle sleeve (22) installs on casing (17).

2, a kind of reciprocating motion extruder according to claim 1 is characterized in that screw rod (5) makes the discontinuous screw structure.

3, a kind of reciprocating motion extruder according to claim 1 and 2 is characterized in that machine barrel (6) inner surface is along axis direction installation three row's kneading pins (24).