CN2148659Y

CN2148659Y - Bar extruder

Info

Publication number: CN2148659Y
Application number: CN 92217685
Authority: CN
Inventors: 杨石山; 罗乃奇; 杨震宁
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-08-29
Filing date: 1992-08-29
Publication date: 1993-12-08
Anticipated expiration: 2002-08-29

Abstract

The utility model discloses a bar extruder, comprising a driving device, a main shaft, a screw rod, a charging hopper, a machine barrel and a hole plate; a conical hollow hole connected with the main shaft is arranged in the screw rod; the length of each section of the screw rod changes according to definite descending quantity; a slope angle is formed between the dentiform end surface of the screw rod and an axial lead, being good for transporting and compressing the materials and preventing the returning of the materials. The utility model has the advantages of compact structure, small size, beautiful appearance, low energy consumption, long service life, high production capacity, low noise, no return of the materials, etc. The utility model is suitable for molding and producing of the medicine, foods, ceramic, plastic and chemical industry catalyst.

Description

Bar extruder

The utility model technical field belongs to the process equipment generally be in plastic state substance, especially with extrude the process equipment that combines.

The screw rod banded extruder that is applied to the powder strip contour machining equipment employing of industries such as medicine, food, pottery, plastics at present all is equidistant, aclinic banded extruder.When being used for the extrusion material, because the screw rod aclinal, become the upright position between the flank of tooth and the axial line, so the resistance of feeding, material extrusion is big, need wasted work also big, raw material produces bigger noise easily from the tip clearance feed back of screw rod simultaneously, and this kind banded extruder volume is also big.

It is to change that the purpose of this utility model provides the every joint pitch of a kind of screw rod, and screw tooth surface is the screw rod banded extruder that tilts to position between the axial line.

Task of the present utility model is achieved in that it is made of transmission mechanism, main shaft, screw rod, hopper, machine barrel and orifice plate.Screw rod is a cored screw, and the hollow axis hole in it is taper.The pitch of screw rod from feed opening to the every joint pitch the discharging opening progressively from diminishing greatly.The flank of tooth of screw rod is the angle that tilts to the angle α between the axial line.Screw rod has one or two or three, and the flank of tooth of screw rod is 65 ° to 85 ° angles to angle α between the axial line.

High inclination-angle Variable pitch screw banded extruder has compact conformation, volume is little, output is high, good looking appearance, energy consumption is low, noise is low (about 30 decibels), long service life, the advantage of no feed back, it is suitable for the moulding of medicine, food, pottery, plastics and chemical catalyst and produces use.

Fig. 1 the utility model front view

Fig. 2 high inclination-angle Variable pitch screw structural representation

Fig. 3 the utility model vertical view

Below in conjunction with accompanying drawing the utility model is described in further detail:

The banded extruder of present embodiment adopts high inclination-angle displacement twin-screw banded extruder.

Motor drives reductor (7) is passed to sprocket wheel (6) with power and is passed to and gear (4) is arranged on main shaft (8), the main shaft (8) and be bearing on the bearing block (5), the hollow endoporus of the taper of high inclination-angle Variable pitch screw is connected with main shaft (8), and positioning accuracy height, mounting or dismounting are conveniently.Gear (4) transmission on the main shaft (8) is parallel to the gear (10) on the driven shaft (9) of main shaft (8), thereby the two high inclination-angle Variable pitch screws (1) that are enclosed within on main shaft (8) and the driven shaft (9) are rotated.Turning clockwise then as main shaft (8), driven shaft (9) is rotated counterclockwise.Raw material is added in the hopper (3), and screw rod (1) twists in pressurization in the machine barrel (2) to material, and machine barrel (2) is because of adorning two screw rods, so become spectacle.Material is extruded the strip product of certain specification by the aperture of orifice plate (9).Strip product diameter is generally in 1.5mm to 10mm scope, also suitable dilated diameter size.

The pitch of screw rod (1) is by feed opening to discharging opening progressively from big to small, and it is the pitches of adjacent two joint pitch dimension left side pitches than the little 0.5 times of discharging opening of right side pitch that this routine pitch changes.Be that every joint pitch changes by the number that necessarily successively decreases.α selects at the angle 80 ° of angles for use.Because screw rod (1) feed inlet end pitch is big, material is rolled up in machine barrel (2) by screw rod (1) in putting into machine, and pitch progressively reduces in tube, material is progressively pressurizeed, and pushing force is increased severely, like this, product extrudes that stripe shape is smooth, density increases, and helps the raising of product quality.In mass transport, compression, extrusion, because between screw rod (1) flank of tooth and the axial line is the inclination angle, the material reaction must up be climbed along an inclination angle on helicoid, this dynamics is quite big, it has the component of material extrusion forward, helps the extruding of material, and material is difficult for from helical tooth and the material extrusion back of machine barrel gap location, thereby noise reduces greatly, and power consumption also descends greatly.Owing to use twin-screw, output increases greatly, the banded extruder volume-diminished.Because of no material returns crowdedly, also increased service life of mechanical device.

Per hour more than 150 kilograms, noise is lower than 30 decibels to present embodiment high inclination-angle displacement twin-screw banded extruder production capacity, and power is less than 10 kilowatts, and maintenance cycle is generally more than 6 years.Performance is better than the banded extruder of present all styles of.

Claims

1, a kind of high inclination-angle Variable pitch screw banded extruder, it is made of transmission mechanism, main shaft, screw rod, hopper, machine barrel and orifice plate, it is characterized in that screw rod (1) is a cored screw, hollow axis hole in it is taper, the pitch of screw rod (1) from the every joint pitch to the discharging opening of feed opening be progressively from diminish greatly, the flank of tooth of screw rod (1) is the angle that tilts to the angle α between the axial line.

2,, it is characterized in that screw rod (1) has one or two or three according to the described banded extruder of claim 1.

3,, it is characterized in that the flank of tooth of screw rod (1) is 65 °～85 ° angles to angle α between the axial line according to the described banded extruder of claim 1.