CN210308933U - Mechanical vibration type plastic extruder head device - Google Patents
Mechanical vibration type plastic extruder head device Download PDFInfo
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- CN210308933U CN210308933U CN201920731302.4U CN201920731302U CN210308933U CN 210308933 U CN210308933 U CN 210308933U CN 201920731302 U CN201920731302 U CN 201920731302U CN 210308933 U CN210308933 U CN 210308933U
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- vibration
- push rod
- extruder head
- extruder
- head
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- 239000004033 plastic Substances 0.000 title claims abstract description 27
- 229920003023 plastic Polymers 0.000 title claims abstract description 27
- 238000001125 extrusion Methods 0.000 claims abstract description 22
- 230000008878 coupling Effects 0.000 claims abstract description 7
- 238000010168 coupling process Methods 0.000 claims abstract description 7
- 238000005859 coupling reaction Methods 0.000 claims abstract description 7
- 210000004907 gland Anatomy 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims abstract description 3
- 230000033001 locomotion Effects 0.000 claims description 21
- 238000003466 welding Methods 0.000 claims description 7
- 239000000155 melt Substances 0.000 claims description 4
- 238000005266 casting Methods 0.000 claims description 2
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 13
- 230000009471 action Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 9
- 238000010008 shearing Methods 0.000 description 9
- 238000000465 moulding Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000011343 solid material Substances 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000010137 moulding (plastic) Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
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- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model discloses a mechanical vibration formula plastics extruder head device especially relates to a mechanical vibration of cam, push rod and spring and extrudes, aims at changing the flow property when the material is extruded, weakens and extrudes the action of expanding. The device comprises an extrusion part and an auxiliary device for realizing vibration extrusion, wherein the two parts are horizontally arranged. The extrusion part mainly comprises a filter plate, a machine head body, a mouth die body, a diffluence cone, a vibration cavity, a mouth die gland, a cooling loop and the like. The auxiliary device for realizing vibration extrusion comprises an alternating-current servo motor, an elastic pin coupling, a sliding bearing, a camshaft, a push rod and a spring. The whole vibrating device is fixed on a bracket with a roller, and the roller controls the movable bracket to adjust the depth of the push rod inserted into the vibrating cavity, so that the amplitude of the vibrating system is adjusted. The adjustment of the frequency of the alternating current servo motor can realize the adjustment of the vibration frequency. The device has simple structure, simple and convenient frequency and amplitude adjustment and wide application value.
Description
Technical Field
The invention relates to the technical field of plastic extrusion molding, in particular to a cam, push rod and spring mechanical vibration extruder head molding device.
Background
The molding is an important processing method for plastic processing molding, and currently, a single-screw extruder and a double-screw extruder are widely applied in China. In the traditional screw extruder, solid materials are completely conveyed by friction in the process of plasticizing and conveying the solid materials, plasticizing and melting are mainly carried out by external heating and shearing heat, and melts are mainly conveyed by the process of shearing the melts, so that the defects of low material plasticizing and conveying efficiency, nonuniform plasticization and the like exist. In recent years, researches on melt vibration extrusion have been made at home and abroad. Through the research on vibration extrusion, people find that the vibration field can change the rheological property of the melt, such as shear thinning, and simultaneously can effectively reduce the residual stress, reduce the extrusion pressure, weaken the extrusion swelling behavior, reduce the production energy consumption and improve the product quality stability. The vibration extrusion molding device is characterized in that a vibration field is additionally arranged in the extrusion molding process of plastic materials so as to change the flow property of the materials during extrusion. Through the continuous exploration of vibration extrusion molding at home and abroad, the main vibration forms at present comprise mechanical vibration, ultrasonic vibration and electromagnetic vibration.
The mechanical vibration comprises push rod shearing motion, rotary shearing motion bidirectional vibration, parallel vertical superposition shearing motion, a capillary dynamic rheometer and the like. The so-called push rod shearing movement is that the plastic melt is sheared by the pull rod in the neck mold through the push-pull action of the piston on the pull rod, and the material can do circumferential movement along the core rod and generate orientation, so that the circumferential strength and the rigidity are improved to a certain extent.
The prior patent 201310325886.2 discloses that the mechanical vibration is realized by a crank-link mechanism, the crank is driven by a motor, a link is connected with a piston, and the other end of the piston is connected with a link extending into a machine head. The vibrating device is fixedly connected above the extruder head, and the amplitude of the vibration process cannot be changed due to the fixed moving stroke of the piston. In addition, the power transmitted by the motor of the device passes through the crank connecting rod structure, then passes through the piston and finally is reciprocated and vibrated by the connecting rod, so that the device is not only complex in structure, but also relatively large in energy loss due to the fact that the power is transmitted through the intermediate member, and the transmission route is relatively long. In addition, the link mechanism is not suitable for high-speed movement, and the adjustment range of the vibration frequency of the rubber material is limited. The interior of the machine head is in a straight-through form without a sprue spreader, and the problems of large pressure loss, uneven plasticization, insufficient molding pressure and the like are easily caused by overlong flow channels.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a novel mechanical vibration extruder head for plastic molding. The device can effectively expand the application of the plastic vibration molding technology and better meet the production requirement of plastic products.
The technical scheme of the invention is as follows: the mechanical vibration type plastic extruder head device is realized by an additional cam push rod and a spring device, a cam shaft rotates under the drive of an alternating current servo motor to push the push rod matched with the cam shaft to enter a vibration cavity to shear and extrude materials, and when the cam rotates, the push rod is pushed back by the restoring force of the spring to ensure the contact of the push rod and the cam so as to realize a stable vibration process. The push rod reciprocates in the plastic melt to shear and extrude the plastic melt, so that the flowing state of the plastic melt is changed, the vibration extrusion is realized, and the plasticizing effect is further enhanced.
The technical scheme of the invention is as follows: a mechanical vibration type plastic extruder head device realizes reciprocating motion in a vibration cavity through a push rod. The push rod is in contact with the cam point, the cam shaft is driven by the alternating current servo motor to rotate to push the push rod to enter the vibration cavity, and when the cam rotates, the push rod is pushed back by the restoring force of the spring, so that the reciprocating motion of the push rod is realized. The adjustment of the frequency of the alternating current servo motor can realize the adjustment of the reciprocating motion frequency of the push rod. The whole vibrating device is fixed on the support with the roller, the roller has a self-locking function, the moving support is controlled by the roller to adjust the inserting depth of the push rod into the vibrating cavity, so that the amplitude of the vibrating system is adjusted, and the adjusting range of the vibrating system is 0-30 mm.
The mechanical vibration type extrusion machine head device used for the method comprises an extrusion part and an auxiliary device for realizing vibration extrusion, wherein the extrusion part mainly comprises a filter plate, a filter screen, a machine head body, a mouth mold body, a shunting cone bracket, a shunting core body, a vibration cavity, a mouth mold and a mouth mold gland. The auxiliary device for realizing vibration extrusion comprises an alternating-current servo motor, an elastic pin coupling, a sliding bearing, a camshaft, a push rod and a spring. The alternating current servo motor is connected with the camshaft through the elastic pin coupling, and sliding bearings are installed at two ends of the camshaft. The push rod is inserted into the flow passage core body vibration cavity of the machine head through a hole formed in the machine head body.
The push rod is simultaneously pressed by the cam and the material, so that the stability of the push rod is ensured.
The cam is a typical disc cam structure, and is in the shape of an eccentric circle, and the cam shaft is driven by an alternating current servo motor.
The alternating-current servo motor is connected with the camshaft through the elastic pin coupling, transmission of movement and power is guaranteed, and the camshaft and the elastic pin coupling are in interference fit. The camshaft and the sliding bearing are in clearance fit. The frequency of the reciprocating motion of the push rod, namely the vibration frequency, can be adjusted by adjusting the frequency of the alternating current servo motor.
The push rod is inserted into the flow passage core body of the machine head through a hole formed on the machine head body. The cam shaft is driven by the AC servo motor to rotate, the push rod matched with the cam shaft is pushed into the vibration cavity, and when the cam rotates, the push rod is pushed back by the restoring force of the spring, so that reciprocating telemechanical movement of the push rod is realized.
The whole vibrating device is fixed on the support with the roller, the roller has a self-locking function, and the moving support is controlled by the roller to realize the insertion depth of the push rod into the vibrating cavity, so that the amplitude of the vibrating system is adjusted.
The machine head is connected with the extruder through flanges, the size of a connecting hole of the machine head flange is consistent with that of a connecting hole of a flange of the extruder barrel, the flanges are fixed on the machine head body and the extruder barrel through welding connection, the two flanges are fastened through bolts, all the connecting bolts are circumferentially and uniformly distributed, and the coaxiality of the connection between the machine head and the extruder is guaranteed.
The connection of the machine head body and the mouth mold body adopts thread fit. The mouth mold gland is fixedly connected on the mouth mold body through an inner hexagonal cylindrical head screw, and then the mouth mold is compressed. The neck ring mold is connected with the neck ring mold body through bolts.
The shunting cone and the shunting cone bracket adopt a welding structure, and the shunting cone and the shunting core body are connected through threads. The matching modes of the shunting cone support and the machine head body and the vibration cavity and the machine head body are interference fit.
Compared with the prior art, the invention has the following advantages:
1. compared with the traditional screw extruder, the shearing and the vibration of the plastic melt in the machine head are realized through the additional device, and the plasticizing is more uniform under the shunting action of the shunting cone of the machine head, so that a better effect is achieved.
2. The mechanical vibration is realized through the additional cam push rod spring structure, and the mechanical vibration device is simple in structure, easy to process, low in cost and convenient to install.
3. Through the drive of the alternating-current servo motor, the transmission of the motion of the cam shaft is short in transmission route and low in energy consumption.
4. The frequency of the reciprocating motion of the push rod can be controlled by controlling the frequency of the alternating current servo motor. The whole vibrating device is fixed on the support with the roller, and the motion amplitude of the push rod can be adjusted by moving the support.
Drawings
FIG. 1 is a schematic view of the structure of the apparatus of the present invention.
FIG. 2 is a schematic sectional view taken along line A-A of FIG. 1.
Detailed Description
The present invention will be described in further detail with reference to the following examples and the accompanying drawings.
Example as shown in fig. 1, an extruded rod is taken as an example, and a vibration power field is added. The machine head is connected with the extruder through flanges, the size of a connecting hole of the machine head flange is consistent with that of a connecting hole of a flange of the extruder barrel, the flanges are fixed on the machine head body and the extruder barrel through welding connection, the two flanges are fastened through bolts, all the connecting bolts are circumferentially and uniformly distributed, and the coaxiality of the connection between the machine head and the extruder is guaranteed.
Plastics become the molten state through the plastify, the shearing of screw rod, the heating of feed cylinder in the barrel of extruder, in the even aircraft nose that flows through the hole of filter 17, the plastics fuse-element passes through spreader cone 16, becomes linear motion by the helical motion, forms certain compression ratio, obtains further shearing, makes the plastify more even. The shunt cone 16 and the shunt cone bracket 15 are welded structures. The plastic melt is further conveyed onwards through a dividing core 14 to a vibration chamber 13 and finally to a die 11, where the rod is extruded. The shunt cone 16 and the shunt cone bracket 15 adopt a welding structure, and the shunt cone 16 and the shunt core body 14 are connected through threads. The matching mode of the shunting cone bracket 15 and the machine head body 12 and the vibrating cavity 13 and the machine head body 12 is interference fit. The neck ring mold 11 is connected with the neck ring mold body 7 through a bolt 8, the neck ring mold body 7 is connected with the neck ring mold gland 10 through an inner hexagonal cylindrical head screw 9, and the neck ring mold 11 is in tight fit with the neck ring mold gland 10. Reasonable cooling loops such as a baffle plate, a drill hole and the like can be arranged in the machine head, and the temperature of the machine head body is controlled to meet the extrusion requirement.
When the plastic melt passes through the vibration cavity 13, the elastic pin coupler 2 transmits force and torque to drive the cam shaft 4 to rotate by the driving of the alternating current servo motor 1, the push rod 5 matched with the cam shaft is pushed to enter the vibration cavity 13, materials are cut and extruded, and when the cam rotates, the push rod 5 is pushed back by the restoring force of the spring 6, so that the contact between the push rod 5 and the cam is ensured, and a stable vibration process is realized. The cam is in a disc cam structure, the shape is an eccentric circle, the number of the disc cams is not limited to 3, 3-5 disc cams can be adopted, and the cam and the camshaft 4 can adopt a welding or integral casting structure. The camshaft 4 and the sliding bearing 3 are in clearance fit, and the sliding bearing 3 bears a radial load. The length of vibration chamber 13 should satisfy the length that can hold 3 ~ 6 push rods 5, vibration chamber 13 sets up the bush with the hookup location of push rod 5, the outer face of cylinder of bush is connected with 13 inner walls interference fit in vibration chamber, the bush hole is connected with 5 clearance fit of push rod, select the clearance volume according to melt viscosity to be 0.03 ~ 0.08mm, 0.05 ~ 0.08mm clearance volume can be selected to the fuse-element of high viscosity, 0.03 ~ 0.05mm clearance volume can be selected to the fuse-element of low viscosity.
The adjustment of the vibration frequency in the flowing process of the sizing material is realized by adjusting the frequency of the alternating current servo motor 1 to adjust the frequency of the reciprocating motion of the push rod 5. The amplitude adjustment in the flowing process of the rubber material is realized by adjusting the relative position of the vibrating device and the machine head through the roller device with a self-locking function to realize the moving stroke of the vibrating rod in the vibrating cavity. The vibration flow of the rubber material under different vibration parameters is realized through different amplitude and frequency changes, and the purposes of changing the rubber material fluidity and reducing the flow resistance are achieved.
Claims (8)
1. The mechanical vibration type plastic extruder head device comprises an extruding part and an auxiliary device for realizing mechanical vibration, wherein two parts are horizontally placed.
2. The mechanical vibration type plastic extruder head device according to claim 1, wherein the auxiliary device for realizing mechanical vibration comprises an alternating current servo motor (1), an elastic pin coupling (2), a sliding bearing (3), a camshaft (4), a push rod (5) and a spring (6), wherein the alternating current servo motor (1) is connected with the camshaft (4) through the elastic pin coupling (2), the sliding bearing (3) is arranged at two ends of the camshaft (4), the camshaft (4) is in clearance fit with the sliding bearing (3), the spring (6) is arranged on the push rod (5), the push rod (5) is inserted into a flow channel core body of the extruder head through a hole formed in the extruder head body, the push rod (5) is a flat-bottom push rod, and the push rod (5) realizes return motion through the spring (6).
3. The mechanical vibration type plastic extruder head device according to claim 1, characterized in that the extrusion part mainly comprises a filter plate (17), a head body (12), a mouth mold body (7), a shunt cone (16), a shunt cone support (15), a shunt core body (14), a vibration cavity (13), a mouth mold (11) and a mouth mold gland (10), wherein the head body (12) is connected with the mouth mold body (7) in a threaded fit, the mouth mold gland (10) is connected and fixed on the mouth mold body (7) through an inner hexagonal cylinder head screw (9), the shunt cone (16) and the shunt cone support (15) adopt a welding structure, the shunt cone (16) and the shunt core body (14) are connected through a thread, the shunt cone support (15) is in an interference fit with the head body (12) and the vibration cavity (13) is in an interference fit with the head body (12), the mouth mold (11) is connected with the mouth mold body (7) through a bolt (8), reasonable cooling loops such as a baffle plate, a drill hole and the like can be arranged in the machine head, and the temperature of the machine head body is controlled to meet the extrusion requirement.
4. A mechanically vibrating plastics extruder head assembly as claimed in claim 1, wherein said cam is in the form of a disc cam structure, the shape is eccentric circle, the number of disc cams is not limited to 3, 3-5, the cam and the camshaft (4) can be welded or integral casting structure.
5. A mechanically vibrating plastics extruder head assembly according to claim 1, wherein said extruder head and said extruder are flanged, the size of the connecting hole of the head flange is the same as the size of the connecting hole of the extruder barrel flange, the flanges are fixed to the head body and the extruder barrel by welding, the two flanges are fastened by bolts, all the connecting bolts are evenly distributed circumferentially, and the coaxiality of the connection between the extruder head and the extruder is ensured.
6. A mechanically vibrating plastics extruder head assembly, according to claim 1, wherein said means for assisting in achieving mechanical vibration is affixed to a carriage (18) having rollers with self-locking features, and the movement of the carriage (18) is controlled by the rollers to adjust the depth of insertion of the ram into the vibration chamber, thereby achieving adjustment of the amplitude of the vibration system, within the range of 0-30 mm.
7. A mechanically vibrating plastics extruder head device according to claim 2, wherein said adjustment of the frequency of the AC servo motor (1) enables the adjustment of the frequency of the reciprocating movement of the ram (5), i.e. the vibration frequency, within the range of 0 to 4.17 Hz.
8. The mechanically vibrating plastic extruder head device according to claim 3, wherein the length of the vibration cavity (13) is sufficient to accommodate 3-6 push rods (5), a bushing is arranged at the connection position of the vibration cavity (13) and the push rods (5) to prevent flash, the outer cylindrical surface of the bushing is in interference fit connection with the inner wall of the vibration cavity, the inner hole of the bushing is in clearance fit with the push rods, the clearance amount is selected to be 0.03-0.08 mm according to the melt viscosity, the clearance amount is selected to be 0.05-0.08 mm for a high-viscosity melt, and the clearance amount is selected to be 0.03-0.05 mm for a low-viscosity melt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920731302.4U CN210308933U (en) | 2019-05-21 | 2019-05-21 | Mechanical vibration type plastic extruder head device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920731302.4U CN210308933U (en) | 2019-05-21 | 2019-05-21 | Mechanical vibration type plastic extruder head device |
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| Publication Number | Publication Date |
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| CN210308933U true CN210308933U (en) | 2020-04-14 |
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| CN201920731302.4U Expired - Fee Related CN210308933U (en) | 2019-05-21 | 2019-05-21 | Mechanical vibration type plastic extruder head device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115008688A (en) * | 2022-01-18 | 2022-09-06 | 广东轻工职业技术学院 | Plastic mold for realizing high-frequency large-amplitude vibration of cavity |
-
2019
- 2019-05-21 CN CN201920731302.4U patent/CN210308933U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115008688A (en) * | 2022-01-18 | 2022-09-06 | 广东轻工职业技术学院 | Plastic mold for realizing high-frequency large-amplitude vibration of cavity |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200414 Termination date: 20210521 |
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| CF01 | Termination of patent right due to non-payment of annual fee |