CN2589179Y - Constant current regulating frame head of bolt extrusion machine - Google Patents
Constant current regulating frame head of bolt extrusion machine Download PDFInfo
- Publication number
- CN2589179Y CN2589179Y CN02294673U CN02294673U CN2589179Y CN 2589179 Y CN2589179 Y CN 2589179Y CN 02294673 U CN02294673 U CN 02294673U CN 02294673 U CN02294673 U CN 02294673U CN 2589179 Y CN2589179 Y CN 2589179Y
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- CN
- China
- Prior art keywords
- head
- regulating block
- machine head
- precursor
- leading screw
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model provides a constant current regulating machine head of a screw extruding machine, which relates to improvement of the existing screw extruding machine head. The machine head body is a component and is composed of a machine head front body, a machine head rear body, and a regulating block, both sections of the internal surface of the regulating block can respectively form sliding fit with a slide way of the machine head front body and a slide way of the machine head rear body; the external surface of the regulating block and the internal surface of the machine head front body can form the sliding fit; lead screws are spirally connected with the regulating block; an end head of the lead screws is provided with steps which are positioned with the connecting body of the machine head; the other end head of the lead screws is fixedly connected with a positioning component, a movable lead screw can make axial rotation and can drive the regulating block to make axial reciprocating movement in the slide way of the machine head front body and the slide way of the machine head rear body. The utility model can be matched and used with a single screw extruding machine or a double screw extruding machine, and through the constant current, precision of extruded products can be adjusted and increased.
Description
Technical field
The utility model is the improvement to existing screw extruder head, can with the supporting use of single, double screw extruder, regulate by current stabilization and to improve the extruded product precision.
Background technology
Be used for macromolecular material and extrude the screw extruder and the direct-connected production line of head of processing, because the screw rod of extruder had both played the effect of melting mixing material, play the effect of build-up pressure again, in extrusion process, owing to the character that is subjected to material, feeding fluctuation, reclaimed materials admixture ratio, the variation of operating procedure condition or the like all multifactor influences, the pressure oscillation of fused mass when the extruder porous plate flows out is bigger, thereby cause the fluctuation of extruding output, make goods produce error along the size of extruding each cross section on the direction, the precision of fabricated product is extruded in influence.Common extruder head mainly is made up of mouth mould, pressing plate, handpiece body, plug and the head connector of moulded products outer surface, and the inner surface of handpiece body is generally inner conical surface, and this face is not a continuous transition surface if article outer surface is not cylindrical.The cross section of fluid channel shape and the size of handpiece body are all fixed, and it is uncontrollable therefore extruding flow rate.
Summary of the invention
The utility model screw extruder current stabilization adjusting head is the improvement to common extruder head structure, a kind of mechanism that the screw extruder smelt flow is measured stabilization is proposed, being equipped with one in the handpiece body can axially movable regulating block, make the stationary flowpath in the handpiece body become the runner that can change sectional dimension, make the flow of the fused materials of from machine head port mould, extruding more stable, the variation of extruding flow that minimizing causes with extrusion pressure fluctuation or other reasons, thus the precision of goods can be improved.
Common extruder head is made up of mouth mould 1, pressing plate 2, handpiece body 3, plug 4, head connector 5 as shown in Figure 1.
The utility model screw extruder current stabilization is regulated the head part of head: mouthful mould, pressing plate, plug are identical with common extruder head with the head connector.
The technical solution of the utility model is: handpiece body is an assembly, handpiece body by head precursor, head after body and regulating block form; Two sections of the regulating block inner surface respectively with head precursor slideway and head after the body slideway movingly, regulating block inner surface stage casing is a round slip surface, regulating block outer surface and head precursor inner surface are movingly, leading screw is threaded with regulating block, there are step and head connector location in one termination of leading screw, fixedlys connected with keeper in another termination of leading screw; Make axial rotation drive regulating block by the movable wire thick stick and behind head precursor slideway and head, make axially reciprocating in the body slideway.Keeper is back-up ring or thrust bearing.Leading screw and corresponding supporting screw gear thereof are 2 to 4 covers.Regulating block outer surface and head precursor inner surface are cylindrical or prismatic (cross section is square, rectangle, hexagon etc.).
The utility model and measuring system and driving transmission system are used.Measuring system can be made up of the gauging instrument gauging instrument of thickness measuring (as: calibrate or) and microprocessor.Microprocessor carries out computing with the linear velocity value of the product size signal of measuring instrument input and existing production line and draws the extrudate flow rate score as feedback signal, move by the regulating block that drives transmission system drive head by servomotor, the motion of transmission system is controlled by the feedback signal through microprocessor processes.
According to the following theory of extruding: extruder is when stable extruding, and the pass between flow rate by head and head pressure at two ends fall is:
Q=K
QIn the Δ P/ η formula: the Q-volume flow, K falls in Δ P-head pressure at two ends
Q-die shape coefficient, the viscosity of melt in the η head.
When the pressure of extruder homogenizing zone end produces fluctuation, will cause variation, therefore by the volume flow rate of head, when Δ P changes, under the situation that keeps head outlet size, shape invariance,, can make the die shape COEFFICIENT K by changing the cross section of fluid channel parameter
QChange, thereby make K
QIt is constant that the value of Δ P keeps, and the Q value is remained unchanged.The extruder current stabilization is regulated head and is handled moving of regulating block by the signal value accessory drive of the representative flow rate of microprocessor output, fast the moving of adjusting of control current stabilization governor motion changes the flow channel cross section parameter, directly produces stable effect of extruding flow.
In extrusion, determine to set flow rate value according to extruding fabrication process condition, when the flow rate of extrusion melt equals to set value, it is motionless that regulating block is positioned at the centre position, when the flow rate of extrusion melt surpassed setting value, regulating block moved to the head Way in, reduces K
QValue reduces flow rate.Regulating block moves to the head Way out when the flow rate of extrusion melt is lower than setting value.Increase K
QValue increases flow rate.
With moving and mobile limiting value of microprocessor control and regulation piece.When the signal value of the representative flow rate of microprocessor output during less than setting value, move by the forward of regulating block, thereby changed the flow channel cross sectional shape, make K
QValue improves, and increases the flow of melt extrusion, when the signal value of the representative flow rate of microprocessor output during greater than setting value, by oppositely moving of regulating block, and makes K
QValue reduces, and reduces the flow of melt extrusion.Adopt the utility model current stabilization to regulate the fluctuation of extruding output that head can significantly reduce the extruder extrusion melt, guarantee the state compacted under of goods, effectively raise the dimensional accuracy of extruded product at stable melt flow rate.The utility model current stabilization is regulated head and is different from existing mouthful of mould governor motion, and existing mouth mould governor motion is that the mouth mould shape and size of the final cross sectional shape that forms goods are mediated, to guarantee having identical sectional dimension on same cross section.Use this current stabilization to regulate head and can reduce goods, therefore can improve the precision of goods along the error of extruding each cross section on the direction.
The utility model current stabilization is regulated head and is applicable to that various screw extruders extrude the extruded product of different shape.
Description of drawings
Fig. 1 is the structure chart of common extruder head.
Fig. 2 is the front view that the utility model screw extruder current stabilization is regulated head.
Fig. 3 is that A among Fig. 2 is to view.
Fig. 4 is the B-B cutaway view among Fig. 2.
The specific embodiment
Embodiment
As Fig. 2, Fig. 3 and shown in Figure 4, the utility model screw extruder current stabilization is regulated head and is made up of mouth mould 1, pressing plate 2, handpiece body, plug 4, head connector 5.Handpiece body is an assembly, handpiece body by head precursor 3-1, head after body 3-2 and regulating block 3-3 form; Two sections 3-3A of regulating block inner surface respectively with head precursor slideway 3-1A and head after body slideway 3-2A movingly, regulating block inner surface stage casing 3-3B is round slip surface (identical with the shape of common extruder head correspondence position), regulating block outer surface 3-3C and head precursor inner surface 3-1B are movingly, leading screw 6 is threaded with regulating block 3-3, there are step 6-1 and head connector 5 location in one termination of leading screw 6, fixedlys connected with keeper 8 in another termination of leading screw 6; Drive leading screw 6 by the rotating speed of the signal controlling servomotor of Measurement and Control System output by transmission system and rotate, behind head precursor slideway 3-1A and head, make axially reciprocating in the body slideway 3-2A thereby drive regulating block 3-3.Transmission system can be made up of screw gear, adjusting gear ring and travelling gear.Measurement and Control System can be made up of gauging instrument and microprocessor.Keeper 8 is a back-up ring.Leading screw 6 and corresponding supporting screw gear 7 thereof be 4 the cover, that is: regulating block 3-3 be provided with the symmetry 4 screwed holes cooperate with 4 leading screws 6.Regulating block outer surface 3-3C and head precursor inner surface 3-1B are cylindrical.Step 6-1 on keeper 8 and the leading screw 6 plays the axial location effect, leading screw 6 can only be rotated and can not move vertically.Can adopt the JDC-J1 caliper with the matching used gauging instrument of head, be installed in the peripheral position of the extruded product of head outlet.The moving range that the mobile limiting value of setting regulating block 3-3 by microprocessor controls to adjust piece 3-3 less than regulating block 3-3 and head precursor 3-1 and head after body 3-2 in axial spacing.
Claims (4)
1, screw extruder current stabilization adjusting head is made up of mouth mould (1), pressing plate (2), handpiece body, plug (4), head connector (5), it is characterized in that: handpiece body is an assembly, handpiece body by head precursor (3-1), head after body (3-2) and regulating block (3-3) form; Two sections (3-3A) of regulating block inner surface respectively with head precursor slideway (3-1A) and head after body slideway (3-2A) movingly, regulating block inner surface stage casing (3-3B) is a round slip surface, regulating block outer surface (3-3C) and head precursor inner surface (3-1B) are movingly, with head precursor (3-1), leading screw (6) is threaded with regulating block (3-3), there are step (6-1) and head connector (5) location in one termination of leading screw (6), fixedlying connected with keeper (8) in another termination of leading screw (6), makes axial rotation drive regulating block (3-3) by leading screw (6) and make axially reciprocating in the body slideway (3-2A) behind head precursor slideway (3-1A) and head.
2, head according to claim 1 is characterized in that: keeper (8) is back-up ring or thrust bearing.
3, head according to claim 1 is characterized in that: leading screw (6) and corresponding supporting keeper (8) thereof are 2 to 4 covers.
4, head according to claim 1 is characterized in that: regulating block outer surface (3-3C) is cylindrical or prismatic with head precursor inner surface (3-1B).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02294673U CN2589179Y (en) | 2002-12-30 | 2002-12-30 | Constant current regulating frame head of bolt extrusion machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02294673U CN2589179Y (en) | 2002-12-30 | 2002-12-30 | Constant current regulating frame head of bolt extrusion machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2589179Y true CN2589179Y (en) | 2003-12-03 |
Family
ID=33752050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN02294673U Expired - Fee Related CN2589179Y (en) | 2002-12-30 | 2002-12-30 | Constant current regulating frame head of bolt extrusion machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2589179Y (en) |
-
2002
- 2002-12-30 CN CN02294673U patent/CN2589179Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |