CN210308977U - Hydraulic vibration disentanglement device - Google Patents
Hydraulic vibration disentanglement device Download PDFInfo
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- CN210308977U CN210308977U CN201921136759.7U CN201921136759U CN210308977U CN 210308977 U CN210308977 U CN 210308977U CN 201921136759 U CN201921136759 U CN 201921136759U CN 210308977 U CN210308977 U CN 210308977U
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- 238000001514 detection method Methods 0.000 claims abstract description 32
- 239000000155 melt Substances 0.000 claims abstract description 18
- 230000007246 mechanism Effects 0.000 claims description 13
- 238000013016 damping Methods 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 3
- 238000010030 laminating Methods 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 description 34
- 238000000034 method Methods 0.000 description 9
- 238000001125 extrusion Methods 0.000 description 8
- 238000009530 blood pressure measurement Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- 239000010720 hydraulic oil Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000033001 locomotion Effects 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005297 material degradation process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000010094 polymer processing Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
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- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model discloses a hydraulic vibration disentanglement device, which comprises an extruder, a handpiece and a hydraulic system, wherein a vibration cavity and a pressure detection cavity which are mutually communicated are arranged in the handpiece, the vibration cavity is connected with a feed inlet and a vibration hole, the feed inlet is connected with the extruder, and a vibration head is arranged in the vibration hole; the pressure detection cavity is connected with a discharge hole and a pressure sensor; the hydraulic system comprises a hydraulic cylinder, a rotary valve and a hydraulic station, the hydraulic cylinder is connected with the vibrating head, and the hydraulic cylinder, the rotary valve and the hydraulic station are sequentially connected through an oil pipe. The utility model discloses a hydraulic system provides vibration power, and strength is great, can realize the vibration of higher frequency through changeing the valve moreover, and the frequency of vibration is controllable, can effectively carry out the fuse-element and separate tangling, reduces fuse-element viscosity. In addition, the vibration cavity is used for disentangling the melt, the pressure detection cavity is used for detecting the pressure of the melt, the vibration and the pressure are separately carried out, the influence of the vibration on the pressure of the melt is weakened, and the detection accuracy of the pressure of the melt is improved.
Description
Technical Field
The utility model belongs to polymer processing equipment field, especially a hydraulic vibration disentangles device.
Background
The unique long chain structure is an important characteristic that a high molecular polymer is different from other materials, and polymer molecular chains are inevitably mutually inserted to generate constraint and block molecular chain movement, namely entanglement. The lower the degree of molecular chain entanglement, the lower the polymer melt viscosity, the better the flowability, the easier the processing, and conversely, the more difficult the processing. Therefore, the viscosity of the polymer melt can be effectively reduced by reducing the entanglement degree of molecular chains in the processing process of the polymer, and the method has a wide application prospect, such as: 1) the polymer configuration process can be better realized. After the restraint is lacked, the molecular chain movement is simpler, and a condensed state structure which is expected to be formed by people, such as a crystal string or an orientation structure, is easier to form, so that the improvement of the product performance is facilitated; 2) the processability of the polymer is improved. Ultra-high molecular chain polyethylene and other engineering plastics have too high a viscosity to be easily molded, but if less molecular chain entanglement is generated, their viscosity is greatly reduced, and processability is improved without changing molding temperature. For general polymers, the possibility of material degradation can be reduced by reducing the processing temperature after disentanglement; 3) the product will have fewer defects. For some light and thin injection molded articles, the flow resistance is low and the possibility of buckling or short shots is low.
The viscosity of the polymer melt is in fact a dynamic balance of entanglement and disentanglement, and when this balance is broken, a change in viscosity occurs, which is known as shear thinning. Based on the theory, many researches show that the viscosity of the system can be effectively reduced by applying a certain external force field in the polymer forming process, so that the method is an effective method for improving the polymer processability. At present, published patents and researches show that an external force field is divided into low-frequency vibration and ultrasonic vibration mostly, and for the low-frequency vibration, the vibration frequency is only a few hertz to dozens of hertz, and the unwrapping effect is not obvious; the frequency of the ultrasonic vibration is as high as tens of kilohertz, the hysteresis effect of the polymer also causes the ultrasonic vibration not to play all roles, and the action mechanism of the ultrasonic vibration on the polymer is complex. Therefore, a slightly high frequency vibration is more important for the effect of polymer disentanglement.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a hydraulic vibration disentangles device, applys hydraulic vibration and carries out the fuse-element disentanglement at polymer extrusion in-process to realize the purpose that fuse-element viscosity reduces.
The purpose of the utility model is realized like this: the hydraulic vibration disentangling device comprises an extruder, a handpiece and a hydraulic system, wherein a vibration cavity and a pressure detection cavity which are mutually communicated are arranged in the handpiece, the vibration cavity is connected with a feed port and a vibration hole, the feed port is connected with the extruder, and a vibration head is arranged in the vibration hole; the pressure detection cavity is connected with a discharge hole and a pressure sensor; the hydraulic system comprises a hydraulic cylinder, a rotary valve and a hydraulic station, the hydraulic cylinder is connected with the vibrating head, and the hydraulic cylinder, the rotary valve and the hydraulic station are sequentially connected through oil pipes.
Further, the feed inlet is connected with the extruder through a sprue bush.
Furthermore, the vibration cavity is connected with the pressure detection cavity through a melt channel, and a channel size adjusting mechanism is arranged at the melt channel.
Further, passageway size adjustment mechanism includes damping piece, regulation pole and fixed block, be provided with in the aircraft nose from the aircraft nose) outer wall extends to the regulation through-hole of fuse-element passageway, it is located and adjusts the through-hole to adjust the pole, and adjusts the pole and be close to fuse-element passageway's one end and damping piece fixed connection, fixed block fixed mounting is in adjusting the through-hole outer end drill way, adjust the pole and run through the fixed block and with fixed block screw-thread fit.
Furthermore, the outer end of the adjusting rod is provided with a fastening nut.
Further, the lateral wall of pressure measurement chamber is provided with the buffer hole, be provided with buffer gear in the buffer hole.
Further, buffer gear includes the fixed cover of spring bracket, outer spring, the fixed cover of inner spring and spring, the buffer hole is the through-hole, spring bracket installs at the aircraft nose outer wall and covers the outer end drill way of buffer hole, the fixed cover of outer spring sets up the inner wall at spring bracket, the fixed cover of inner spring is including the cover body that is character cut in bas-relief and the baffle of setting at set body open end outer wall, the outer wall of the cover body slides and sealed cooperation with the buffer hole drill way, the aircraft nose outer wall laminating around baffle and the buffer hole outer end drill way, the spring is located set internal portion, and the one end and the set body bottom of spring compress tightly the contact, the other end and the fixed cover of outer spring compress tightly contact.
Furthermore, a pre-tightening screw which penetrates through the spring support and is in threaded fit with the spring support is arranged on the spring support, and the pre-tightening screw is in pressing contact with the outer spring fixing sleeve.
Further, the aircraft nose includes die body and lower die body, go up die body and lower die body and can dismantle the connection and enclose into feed inlet, discharge gate, vibration chamber and pressure measurement chamber.
The utility model has the advantages that: the utility model discloses a hydraulic system provides vibration power, and strength is great, can realize the vibration of higher frequency through changeing the valve moreover, and the frequency of vibration is controllable, can effectively carry out the fuse-element and separate tangling, reduces fuse-element viscosity. In addition, the vibration cavity is used for disentangling the melt, the pressure detection cavity is used for detecting the pressure of the melt, the vibration and the pressure are separately carried out, the influence of the vibration on the pressure of the melt is weakened, and the detection accuracy of the pressure of the melt is improved.
Drawings
Fig. 1 is an overall schematic view of the present invention.
Fig. 2 is a schematic cross-sectional view of a handpiece.
Reference numerals: 1-extruding machine; 2, a machine head; 3, a vibration cavity; 4, detecting pressure; 5-vibrating the head; 6, discharging a material outlet; 7-a pressure sensor; 8, a hydraulic cylinder; 9-rotating the valve; 10-a hydraulic station; 11-a sprue bush; 12-a melt channel; 13-a damping block; 14-adjusting the rod; 15-fixing block; 16-a fastening nut; 17-a spring support; 18-outer spring fixing sleeve; 19-inner spring fixing sleeve; 20-a spring; 21-a baffle plate; 22-Preload screw.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
As shown in fig. 1 and 2, the hydraulic vibration disentangling device of the present invention includes an extruder 1, a head 2, and a hydraulic system, and the extruder 1 may be an existing extruder. The inside of aircraft nose 2 is provided with vibration chamber 3 and the pressure detection chamber 4 of mutual intercommunication, vibration chamber 3 is connected with feed inlet and vibration hole, the feed inlet links to each other with extruder 1, be provided with vibrating head 5 in the vibration hole, vibrating head 5 and vibration hole sliding fit, and will have good leakproofness, avoid the polymer fuse-element to leak. The pressure detection cavity 4 is connected with a discharge hole 6 and a pressure sensor 7; the hydraulic system comprises a hydraulic cylinder 8, a rotary valve 9 and a hydraulic station 10, wherein the hydraulic cylinder 8 is connected with the vibrating head 5, and the hydraulic cylinder 8, the rotary valve 9 and the hydraulic station 10 are sequentially connected through oil pipes.
In the polymer vibration extrusion molding process, the position determination of vibration source is more critical the utility model discloses an in the scheme, the vibration position sets up on the aircraft nose 2 in 1 exit of extruder, and the polymer just accomplishes extrusion processing very fast after the vibration, can reduce the molecular chain and entangle the response time, realizes the viscosity reduction of at utmost.
The hydraulic station 10 is a conventional technology, and is used for driving hydraulic oil to flow to the rotary valve 9 according to a specified path, and the hydraulic oil flows to the hydraulic cylinder 8 after passing through the rotary valve 9, and drives an actuating element such as a piston rod of the hydraulic cylinder 8 to move. And actuating elements such as a piston rod of the hydraulic cylinder 8 are connected with the vibrating head 5 and can drive the vibrating head 5 to move. The rotary valve 9 comprises a valve body and a motor, after a valve core in the valve body is driven to rotate by the motor, the flow direction of hydraulic oil output by the rotary valve 9 is changed, so that the valve core of the valve body is continuously driven by the motor to rotate, the flow direction of the hydraulic oil can be continuously changed, the hydraulic cylinder 8 is driven to drive the vibrating head 5 to reciprocate, and the vibrating head 5 can continuously shear polymer melt in the vibrating cavity 3, so that the purpose of disentangling is achieved. The higher the rotating speed of the motor is, the more frequent the oil liquid is reversed, the higher the frequency of the formed reciprocating vibration head 5 is, and the reversing frequency of the hydraulic oil can be controlled due to the controllable rotating speed of the motor, so that the vibration frequency of the vibration head 5 is adjusted, and the accurate and convenient control of the vibration frequency is realized. The hydraulic vibration system has larger force, and can ensure that the vibration head 5 can effectively shear the polymer melt and ensure the disentanglement effect.
Extrusion pressure is one of factors influencing the quality of polymer, so that the pressure of polymer melt is required to be measured in the extrusion process, in the extruder 1 and the head 2, when the polymer melt is in stable flow, the pressure at a certain position should be constant, but under the action of an external vibration field, particularly a mechanical vibration field, the reciprocating motion of the vibration head 5 tends to intermittently extrude the polymer melt, so that the pressure of the polymer melt can be fluctuated certainly, and the pressure measurement is inaccurate, therefore, the vibration cavity 3 and the pressure detection cavity 4 are separately arranged, the vibration cavity 3 is used for vibration disentanglement, the pressure detection cavity 4 is used for detecting the extrusion pressure of the polymer melt, the pressure fluctuation can be reduced, and the accurate pressure value can be obtained conveniently.
The utility model discloses specific work flow does: the polymer gets into the vibration chamber 3 of aircraft nose 2 through the feed inlet after 1 extrusion of extruder, flows into pressure detection chamber 4 after the vibration, and pressure sensor 7 detects the pressure of the polymer fuse-element in pressure detection chamber 4 and feeds back pressure signal to the control system of extruder 1 to extruder 1 adjustment extrusion pressure. Finally, the polymer melt is discharged from the discharge opening 6.
The vibration cavity 3 is connected with the pressure detection cavity 4 through the melt channel 12, in order to adjust the size of the melt channel 12 and regulate and control the pressure fluctuation in the vibration cavity 3 to be transmitted to the pressure detection cavity 4, the stability of the pressure of the polymer melt in the pressure detection cavity 4 influenced by the pressure fluctuation in the vibration cavity 3 is further reduced, the detection precision of the pressure sensor 7 is improved, and a channel size adjusting mechanism is arranged at the position of the melt channel 12.
Passageway size adjustment mechanism can be with 2 screw-thread fit's of aircraft nose screws etc. preferred, passageway size adjustment mechanism includes damping piece 13, adjusts pole 14 and fixed block 15, be provided with the regulation through-hole that extends to melt channel 12 from 2 outer walls of aircraft nose in the aircraft nose 2, it is located the regulation through-hole to adjust pole 14, and adjusts the one end that pole 14 is close to melt channel 12 and damping piece 13 fixed connection, 15 fixed mounting in regulation through-hole outer end drill way, adjust pole 14 run through fixed block 15 and with 15 screw-thread fit of fixed block. The fixed block 15 can be fixed on the outer end orifice of the adjusting through hole through a screw, and the length of the damping block 13 extending into the melt channel 12 can be driven by rotating the adjusting rod 14, so that the size of the melt channel 12 can be adjusted, and the adjustment is very convenient.
The outer end of the adjusting rod 14 is provided with a fastening nut 16, the fastening nut 16 is in threaded fit with the adjusting rod 14, and after the position of the damping block 13 is adjusted, the fastening nut 16 is rotated to enable the fastening nut 16 to be attached to the fixing block 15, so that the auxiliary positioning effect is achieved, and the fixing of the adjusting rod 14 is guaranteed.
Because the pressure detection chamber 4 can not avoid the existence of pressure fluctuation, in order to reduce the influence of pressure fluctuation to the measuring result of the pressure sensor 7, the detection accuracy of the pressure sensor 7 is further improved, the side wall of the pressure detection chamber 4 is provided with a buffer hole, and a buffer mechanism is arranged in the buffer hole. Buffer gear is elastic mechanism, can play the cushioning effect, and when the polymer pressure in pressure measurement chamber 4 increased, buffer gear was compressed, and the volume in pressure measurement chamber 4 increased, and it is too big to avoid pressure to increase, and when the polymer pressure in pressure measurement chamber 4 reduced, buffer gear reset, and the volume in pressure measurement chamber 4 reduced, and it is too big to avoid pressure drop amplitude to can reduce the fluctuation of pressure, guarantee pressure sensor 7's detection accuracy.
Buffer gear can be the elastic block, like the block rubber etc., or have elastic various elastic component, preferably, buffer gear includes spring bracket 17, the fixed cover of outer spring 18, the fixed cover of inner spring 19 and spring 20, the buffer hole is the through-hole, spring bracket 17 installs at 2 outer walls of aircraft nose and covers the outer end drill way in buffer hole, the fixed cover of outer spring 18 sets up the inner wall at spring bracket 17, the fixed cover of inner spring 19 is including the cover body that is the character cut in bas-relief and the baffle 21 of setting at set body open end outer wall, the outer wall of the cover body slides and sealed cooperation with the buffer hole pore wall, the 2 outer wall laminating of aircraft nose around baffle 21 and the buffer hole outer end drill way, spring 20 is located set body inside, and spring 20's one end compresses tightly the contact with set body bottom, the other end compresses tightly the contact with the fixed cover. The spring support 17 can be fixed on the outer wall of the machine head 2 through a screw, and due to the sliding fit of the sleeve body and the buffer hole, when the pressure of the polymer in the pressure detection cavity 4 is increased, the sleeve body is pushed to move towards the spring support 17, the spring 20 is compressed, and when the pressure of the polymer in the pressure detection cavity 4 is reduced, the spring 20 is reset to play a role in buffering.
The spring support 17 is provided with a pre-tightening screw 22 which penetrates through the spring support 17 and is in threaded fit with the spring support 17, and the pre-tightening screw 22 is in pressing contact with the outer spring fixing sleeve 18. The spring 20 is always in a compressed state, and the external spring fixing sleeve 18 can be pushed to move by rotating the pre-tightening screw 22, so that the compression amount of the spring 20 is changed, and the pre-tightening force of the spring 20 is adjusted.
The machine head 2 can be a whole, in order to facilitate the processing of the vibration cavity 3 and the pressure detection cavity 4 and the setting of the buffer mechanism and the channel size adjusting mechanism, the machine head 2 comprises an upper die body and a lower die body, the upper die body and the lower die body are detachably connected and enclose a feeding hole, a discharging hole 6, a vibration cavity 3 and the pressure detection cavity 4, and the feeding hole is connected with the extruder 1 through a sprue bush 11. The sprue bush 11 is connected with the upper die body and the lower die body through screws, the upper die body and the lower die body are connected into a whole, and connecting screws can be additionally arranged between the upper die body and the lower die body so as to improve the connection stability.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. Hydraulic pressure vibration disentanglement device, its characterized in that: the device comprises an extruder (1), a machine head (2) and a hydraulic system, wherein a vibration cavity (3) and a pressure detection cavity (4) which are communicated with each other are arranged inside the machine head (2), the vibration cavity (3) is connected with a feeding hole and a vibration hole, the feeding hole is connected with the extruder (1), and a vibration head (5) is arranged in the vibration hole; the pressure detection cavity (4) is connected with a discharge hole (6) and a pressure sensor (7); the hydraulic system comprises a hydraulic cylinder (8), a rotary valve (9) and a hydraulic station (10), the hydraulic cylinder (8) is connected with the vibrating head (5), and the hydraulic cylinder (8), the rotary valve (9) and the hydraulic station (10) are sequentially connected through an oil pipe.
2. The hydraulic vibration disentanglement device according to claim 1, wherein: the feed inlet is connected with the extruder (1) through a sprue bush (11).
3. The hydraulic vibration disentanglement device according to claim 1, wherein: the vibration cavity (3) is connected with the pressure detection cavity (4) through a melt channel (12), and a channel size adjusting mechanism is arranged at the melt channel (12).
4. The hydraulic vibration disentanglement device according to claim 3, wherein: passageway size adjustment mechanism includes damping piece (13), adjusts pole (14) and fixed block (15), be provided with in aircraft nose (2) and extend to the regulation through-hole of melt passageway (12) from aircraft nose (2) outer wall, it is located and adjusts the through-hole to adjust pole (14), and adjusts the one end and damping piece (13) fixed connection that pole (14) are close to melt passageway (12), fixed block (15) fixed mounting is in adjusting the through-hole outer end drill way, adjust pole (14) run through fixed block (15) and with fixed block (15) screw-thread fit.
5. The hydraulic vibration disentanglement device according to claim 4, wherein: the outer end of the adjusting rod (14) is provided with a fastening nut (16).
6. The hydraulic vibration disentanglement device according to claim 1, wherein: the side wall of the pressure detection cavity (4) is provided with a buffer hole, and a buffer mechanism is arranged in the buffer hole.
7. The hydraulic vibration disentanglement device according to claim 6, wherein: buffer gear includes spring bracket (17), the fixed cover of outer spring (18), the fixed cover of inner spring (19) and spring (20), the buffer hole is the through-hole, spring bracket (17) are installed at aircraft nose (2) outer wall and are covered the outer end drill way of buffer hole, the fixed cover of outer spring (18) set up the inner wall at spring bracket (17), the fixed cover of inner spring (19) including the cover body that is the character cut in bas-relief and baffle (21) of setting at set body open end outer wall, the outer wall of the cover body slides and sealed cooperation with the buffer hole drill way, baffle (21) and the laminating of aircraft nose (2) outer wall around the buffer hole outer end drill way, spring (20) are located set internal portion, and the one end of spring (20) and the bottom of the cover body compress tightly the contact, and the other end compresses tightly the contact with the fixed.
8. The hydraulic vibration disentanglement device according to claim 7, wherein: the spring support (17) is provided with a pre-tightening screw (22) which penetrates through the spring support (17) and is in threaded fit with the spring support (17), and the pre-tightening screw (22) is in pressing contact with the outer spring fixing sleeve (18).
9. The hydraulic vibration disentanglement device according to claim 1, wherein: the machine head (2) comprises an upper die body and a lower die body, wherein the upper die body and the lower die body are detachably connected and enclose a feeding hole, a discharging hole (6), a vibration cavity (3) and a pressure detection cavity (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921136759.7U CN210308977U (en) | 2019-07-19 | 2019-07-19 | Hydraulic vibration disentanglement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921136759.7U CN210308977U (en) | 2019-07-19 | 2019-07-19 | Hydraulic vibration disentanglement device |
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| Publication Number | Publication Date |
|---|---|
| CN210308977U true CN210308977U (en) | 2020-04-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921136759.7U Withdrawn - After Issue CN210308977U (en) | 2019-07-19 | 2019-07-19 | Hydraulic vibration disentanglement device |
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| Country | Link |
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| CN (1) | CN210308977U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110202772A (en) * | 2019-07-19 | 2019-09-06 | 四川大学 | Hydraulic vibration disentanglement device |
-
2019
- 2019-07-19 CN CN201921136759.7U patent/CN210308977U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110202772A (en) * | 2019-07-19 | 2019-09-06 | 四川大学 | Hydraulic vibration disentanglement device |
| CN110202772B (en) * | 2019-07-19 | 2024-04-26 | 四川大学 | Hydraulic vibration disentanglement device |
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Granted publication date: 20200414 Effective date of abandoning: 20240426 |