CN103753793B - Polymer melt infinitesimal analysis enhancement of heat transfer and mixing plasticizing extruder - Google Patents
Polymer melt infinitesimal analysis enhancement of heat transfer and mixing plasticizing extruder Download PDFInfo
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- CN103753793B CN103753793B CN201410007068.2A CN201410007068A CN103753793B CN 103753793 B CN103753793 B CN 103753793B CN 201410007068 A CN201410007068 A CN 201410007068A CN 103753793 B CN103753793 B CN 103753793B
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- segmentation
- screw rod
- plasticizing
- heat transfer
- mixing
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/56—Screws having grooves or cavities other than the thread or the channel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/565—Screws having projections other than the thread, e.g. pins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/397—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using a single screw
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/57—Screws provided with kneading disc-like elements, e.g. with oval-shaped elements
Abstract
The open polymer melt infinitesimal analysis enhancement of heat transfer of the present invention and mixing plasticizing extruder, mainly comprise reinforced plasticizing part, heating cooling segment, Controlling System and transmission system etc., reinforced plasticizing part, heating cooling segment, the structure of Controlling System and transmission system is identical with conventional forcing machine with mode of connection, the screw rod of reinforced plasticizing part arranges mixing section, mixing section along the circumferential direction n etc. point (or in a certain angle with the axis) segmentation rib is set axially, adjacent segmentation rib is parallel to each other, slot segmentation internal surface between segmentation rib is set up 90 �� and is reversed curved surface, namely the torsion section of confluxing is shunted. in forcing machine of the present invention, under the relative movement of screw rod and machine cylinder, polymer melt is with bolt rotary, one edge slot segmentation internal surface 90 �� torsion, making the heat of machine cylinder be sequentially transmitted through each surface of melt to transmit, forced convection, has the effect of enhancement of heat transfer and plasticizing. in addition melt experiences shunting torsion in slot segmentation and confluxes, and mixes fully, it is to increase mixed effect.
Description
Technical field
The present invention relates to plastic extruding forming device, refer in particular to a kind of can the forcing machine of enhancement of heat transfer and mixing plasticizing.
Background technology
Forcing machine is one of major equipment of plastic working industry. Extruder main machine is primarily of a few part compositions such as reinforced plasticizing system, transmission system, heating-cooling system, Controlling System. Wherein, screw rod and machine cylinder are the key parts of forcing machine. Screw rod rotates in the machine cylinder of heating, and main effect is by solid plastics particle or powder smelting and mixes, and to be squeezed in former shaping and obtains goods or work in-process after sizing for macromolecule melt. The effect of spiro rod plasticizing determines the performance of whole forcing machine, and the heat transfer of the forcing machine of routine and melting effect are not good, and when especially spiral shell groove is darker, problem is more outstanding.
In the middle of the new screw of forcing machine, pin type screw rod a kind of compares the good bypass type screw form of conventional melting effect. Stream is carried out shunting and converges, shunts and converge by pin, converges through several times shunting, strengthens the mixed effect of material. But owing to pin is arranged on machine cylinder or on screw rod, add the difficulty of processing and manufacturing, too increase the cost that maintenance manufactures simultaneously. The relative screw rod of pin is fixed, and heat-transfer effect is not good yet.
In addition, separating screw rod (usually referred to as BM screw rod) a kind of compares the good separating screw rod form of conventional heat-transfer effect. There is the different screw thread of two pitch in BM screw rod melt zone, meets at starting point and the terminal of melt zone, and deputy thread diameter is less than screw diameter, and stream flows through melt zone, Solid-Liquid Separation, and solid phase directly contacts barrel surface, is beneficial to heat transfer, accelerates solid phase fusion. But its mixed effect is not fine.
In the patent (patent No.: mention a kind of enhancement of heat transfer and mixing extruder in 201010512626), rolling body is had between the screw rod of the reinforced plasticizing part of this forcing machine and machine cylinder, rolling body freely rolls while rotating in machine cylinder with screw rod in corresponding groove, can effectively improve heat transfer and the plasticizing effect of forcing machine, but this device is for the ease of installing, and machine cylinder needs to make dissection type.
In patent, (patent No.: propose a kind of device for preparing nano laminated composite material in 200920271878), this device reverses, by 90 ��, 90 �� of torsions that runner can realize melt, direction, polymer melt space is rotated, can be used for melt heat exchange.
Summary of the invention
It is an object of the invention to provide the forcing machine of a kind of polymer melt infinitesimal analysis enhancement of heat transfer and mixing plasticizing, this forcing machine can overcome the deficiency of conventional forcing machine at present, it is to increase the heat transfer of forcing machine and mixing plasticizing effect, obtain higher-quality extrusion moulding product.
The technical scheme of the present invention is, polymer melt infinitesimal analysis enhancement of heat transfer and mixing plasticizing extruder, mainly comprise reinforced plasticizing part, heating cooling segment, Controlling System and transmission system etc., the structure of reinforced plasticizing part, heating cooling segment, Controlling System and transmission system is identical with conventional forcing machine with mode of connection, namely the screw rod rotating plasticization of reinforced plasticizing part is driven by transmission system, the heating cooling of Controlling System control reinforced plasticizing part and the screw speed etc. of reinforced plasticizing part. Screw rod is had in the machine cylinder of reinforced plasticizing part, the screw rod of reinforced plasticizing part arranges mixing section, described mixing section along the circumferential direction n etc. point arrange axially (or in a certain angle with the axis, segmentation rib and screw axial are at an angle) segmentation rib, adjacent segmentation rib is parallel to each other, slot segmentation internal surface between segmentation rib is offered 90 �� and is reversed curved surface, namely shunts the torsion section of confluxing. Like this, extrusion can realize 90 �� of torsions of material.
Polymer melt infinitesimal analysis enhancement of heat transfer of the present invention and mixing plasticizing extruder, utilize Differential Integral Thought, (first split by material and converge again, first differential again integration be collectively referred to as infinitesimal analysis), by certain section of certain length screw rod along the circumferential direction n etc. point segmentation rib is set, n is at least the integer of more than 2, n is preferably greater than 6, polymer melt is made to be divided into n stock, more polyhybrid effect is more good for part number of melt segmentation, after over-segmentation is reversed, by before close to the materials overturning of spiral shell trench bottom to contacting with machine cylinder, the shunting that can realize polymer melt converges, it is beneficial to mixing.
Polymer melt infinitesimal analysis enhancement of heat transfer of the present invention and mixing plasticizing extruder, the numerical value of n, shunting reverse the section of confluxing the i.e. section number of mixing section and arrangement mode can according to material properties, and mixing plasticizing requirement etc. is chosen. The arrangement mode of mixing section on screw rod can be the arrangement arranged side by side and then of multiple segmentation section, realizes continuous print like this and reverses mixing, it is also possible to is the form such as be staggered, repeatedly reverses mixing.
Polymer melt infinitesimal analysis enhancement of heat transfer of the present invention and mixing plasticizing extruder, slot segmentation internal surface between the segmentation rib of mixing section is offered two orthogonal 90 �� and is reversed curved surface, polymer melt is under the relative movement of screw rod and machine cylinder, while with bolt rotary, one edge slot segmentation internal surface 90 �� torsion, make with bottom slot segmentation or the melt transfer that contacts of machine tube inner surface to slot segmentation side, with the melt transfer of slot segmentation one side contacts bottom slot segmentation or machine tube inner surface, make the heat of machine cylinder be sequentially transmitted through each surface of melt to transmit, forced convection, there is the effect of enhancement of heat transfer and plasticizing. the melt of shunting reverses in slot segmentation, then confluxes in slot segmentation end, melt is mixed fully, has the effect of enhancing mixed.
In polymer melt infinitesimal analysis enhancement of heat transfer of the present invention and mixing plasticizing extruder, the segmentation rib direction on screw rod both can be axially can also in a certain angle with the axis, and it is identical or different that this angle can rise angle from the spiral of the spiral shell rib of screw rod. Segmentation rib height can also be identical from the spiral groove depth of screw rod or different, and segmentation rib height value can be less than the spiral groove depth value of screw rod.
Polymer melt infinitesimal analysis enhancement of heat transfer of the present invention and mixing plasticizing extruder can be set up on screw rod one or more snippets this segmentation and reverse part of confluxing. Slot segmentation and machine tube inner wall form closed cavities room, it is contemplated that with the relative movement of machine tube inner surface bottom screw rod, and it is contrary that the sense of rotation of screw rod to be reversed the part slot segmentation internal surface curved surface torsional direction from low to high that conflux with segmentation, is conducive to accelerating torque.
Polymer melt infinitesimal analysis enhancement of heat transfer of the present invention and mixing plasticizing extruder, its useful effect is the transmission strengthening heat in material, enhancement of heat transfer, conventional forcing machine is generally the heating of machine cylinder, and the material heat-transfer effect of polymkeric substance is poor, material close to spiral shell groove is turn to close to machine cylinder by reversing, make material heat absorption evenly, plasticizing evenly, reversed by the shunting of material simultaneously and conflux, enhancing mixed, strengthens melting effect. And can combining with various structures, processing, manufacture conveniently, are easy to safeguard.
Accompanying drawing explanation
Fig. 1 is the scheme of erection of polymer melt infinitesimal analysis enhancement of heat transfer of the present invention and mixing plasticizing extruder;
Fig. 2 is screw rod and the machine cylinder scheme of erection of polymer melt infinitesimal analysis enhancement of heat transfer of the present invention and mixing plasticizing extruder;
Fig. 3 is the screw rod shunting torsion section of the confluxing partial schematic diagram of polymer melt infinitesimal analysis enhancement of heat transfer of the present invention and mixing plasticizing extruder;
Fig. 4 is the screw rod shunting a certain slot segmentation partial schematic diagram of the torsion section of confluxing of polymer melt infinitesimal analysis enhancement of heat transfer of the present invention and mixing plasticizing extruder;
The shunting torsion section of confluxing that Fig. 5 is the screw rod of polymer melt infinitesimal analysis enhancement of heat transfer of the present invention and mixing plasticizing extruder is arranged in juxtaposition schematic diagram;
The section of confluxing staggered arrangement schematic diagram is reversed in the shunting that Fig. 6 is the screw rod of polymer melt infinitesimal analysis enhancement of heat transfer of the present invention and mixing plasticizing extruder.
In figure: 1. reinforced plasticizing part, 2. heat cooling segment, 3. Controlling System, 4. transmission system;
Wherein: 1-1. shunts the torsion section of confluxing, 1-2. machine cylinder, 1-3. screw rod, and 1-1-1. splits rib, and 1-1-2. exports bottom surface, face, 1-1-3. outlet right side, 1-1-4. import bottom surface, face on the left of 1-1-5. import.
Embodiment
Polymer melt infinitesimal analysis enhancement of heat transfer of the present invention and mixing plasticizing extruder as shown in Figure 1, are made up of heating plasticizing part 1, heating cooling segment 2, Controlling System 3 and transmission system 4. Wherein the screw rod 1-3 of reinforced plasticizing part 1 has mixing section namely to shunt the torsion section of confluxing 1-1, sees Fig. 2 and Fig. 3.
Reverse in shunting and in the slot segmentation of the section of confluxing 1-1, offer two orthogonal 90 �� of torsion curved surfaces, it is achieved the torsion of polymer melt, see Fig. 4. Spiral shell trench bottom is divided into Liang Ge district, and a district diminishes gradually along the direction splitting rib, and the degree of depth of groove diminishes gradually until turning 90 degrees to turning round during outlet; Another district becomes big gradually along the direction of segmentation rib, and the degree of depth of groove becomes big gradually until turning 90 degrees to turning round during outlet. Shown in Fig. 4, splitting between rib at two, the spiral shell groove of entrance is reversed into the face stood on right side, and the face that left side is stood changes into spiral shell groove in exit.
Material, by the shunting torsion section of confluxing 1-1 ingress, is divided into n stock by n segmentation rib 1-1-1. Material and two orthogonal 90 �� of torsion curved face contact parts, it is torqued into outlet right side face 1-1-3 by import bottom surface 1-1-4, it is torqued into outlet bottom surface 1-1-2 by face 1-1-5 on the left of import, simultaneously under the relative movement of screw rod 1-3 and machine cylinder 1-2 internal surface, drive whole material to realize 90 �� of torsions, see Fig. 4.
During screw rod 1-3 rotating plasticization, shunting reverses the section of confluxing 1-1 under the relative movement of screw rod 1-3 and machine cylinder 1-2, polymer melt is while rotate with screw rod 1-3, while reversing in slot segmentation, polymer melt different surfaces fully contacts with machine cylinder 1-2 in succession, carrying out forced convection with machine cylinder 1-2, the transmission of strengthening heat, promotes uniformity of temperature profile in molten materials; Simultaneously, it is possible to reverse number and the arrangement mode of the section of confluxing 1-1 by increasing shunting, increase heat transmission and this advantageous process of mixing plasticizing, see Fig. 5 and Fig. 6.
The above particular example being the present invention, coordinates various figure to be illustrated. But the present invention is not limited to the above situation and figure, any based on the above-mentioned said amendment to part or replacement, as long as in the spiritual territory of the present invention, all belonging to the present invention.
Polymer melt infinitesimal analysis enhancement of heat transfer of the present invention and mixing plasticizing extruder change the liquid form of material in tradition forcing machine plasticizing part, 90 �� are utilized to reverse curved surface, realize each surface of polymer melt in succession to contact with machine cylinder 1-2, it is beneficial to the transmission of heat, strengthening heat transfer; Simultaneously melt flow is through the shunting torsion section of confluxing 1-1, and experience shunt, reversed, three steps of confluxing, and can be segmented further by molten materials, the melting effect of promotion material. Overcome the deficiency that conventional forcing machine area of heat transfer is little, heat transfer effect is poor, mixing behavior is poor.
Claims (4)
1. polymer melt infinitesimal analysis enhancement of heat transfer and mixing plasticizing extruder, mainly comprise reinforced plasticizing part, heating cooling segment, Controlling System and transmission system, transmission system drives the screw rod rotating plasticization of reinforced plasticizing part, the heating cooling of Controlling System control reinforced plasticizing part and the screw speed of reinforced plasticizing part, it is characterized in that: in the machine cylinder of reinforced plasticizing part, have screw rod, the screw rod of reinforced plasticizing part arranges mixing section, described mixing section along the circumferential direction n etc. point arrange and axially split rib, adjacent segmentation rib is parallel to each other, slot segmentation internal surface between segmentation rib is offered 90 �� and is reversed curved surface, segmentation rib height is identical with the spiral groove depth of screw rod.
2. polymer melt infinitesimal analysis enhancement of heat transfer according to claim 1 and mixing plasticizing extruder, it is characterised in that: segmentation rib and screw axial are at an angle.
3. polymer melt infinitesimal analysis enhancement of heat transfer according to claim 1 and mixing plasticizing extruder, it is characterised in that: the arrangement mode of mixing section on screw rod is the arrangement arranged side by side and then of multiple segmentation section, or is staggered.
4. polymer melt infinitesimal analysis enhancement of heat transfer according to claim 1 and mixing plasticizing extruder, it is characterised in that: it is contrary that the sense of rotation of screw rod to be reversed the part slot segmentation internal surface curved surface torsional direction from low to high that conflux with mixing section segmentation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410007068.2A CN103753793B (en) | 2014-01-08 | 2014-01-08 | Polymer melt infinitesimal analysis enhancement of heat transfer and mixing plasticizing extruder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410007068.2A CN103753793B (en) | 2014-01-08 | 2014-01-08 | Polymer melt infinitesimal analysis enhancement of heat transfer and mixing plasticizing extruder |
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| Publication Number | Publication Date |
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| CN103753793A CN103753793A (en) | 2014-04-30 |
| CN103753793B true CN103753793B (en) | 2016-06-01 |
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| CN201410007068.2A Active CN103753793B (en) | 2014-01-08 | 2014-01-08 | Polymer melt infinitesimal analysis enhancement of heat transfer and mixing plasticizing extruder |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106863744B (en) * | 2017-03-13 | 2019-03-26 | 北京化工大学 | A kind of single screw rod plasticizing extruder |
| CN113211785A (en) * | 2021-04-13 | 2021-08-06 | 青岛科技大学 | Injection 3D printing device |
| CN115157591B (en) * | 2022-06-21 | 2023-10-27 | 华南理工大学 | Alternating stretching mixing element and method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59160522A (en) * | 1983-03-03 | 1984-09-11 | Kobe Steel Ltd | Kneading vane of twin shaft continuous kneading machine |
| CN102019682A (en) * | 2010-10-13 | 2011-04-20 | 北京化工大学 | Extruder with reinforced heat transmission and mixing functions |
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2014
- 2014-01-08 CN CN201410007068.2A patent/CN103753793B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59160522A (en) * | 1983-03-03 | 1984-09-11 | Kobe Steel Ltd | Kneading vane of twin shaft continuous kneading machine |
| CN102019682A (en) * | 2010-10-13 | 2011-04-20 | 北京化工大学 | Extruder with reinforced heat transmission and mixing functions |
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| CN103753793A (en) | 2014-04-30 |
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