CN203418742U - Twin-screw extruder - Google Patents
Twin-screw extruder Download PDFInfo
- Publication number
- CN203418742U CN203418742U CN201320483687.XU CN201320483687U CN203418742U CN 203418742 U CN203418742 U CN 203418742U CN 201320483687 U CN201320483687 U CN 201320483687U CN 203418742 U CN203418742 U CN 203418742U
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- CN
- China
- Prior art keywords
- screw
- extruding
- twin
- packing cylinder
- long bolt
- Prior art date
- 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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Classifications
-
- 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
- B29C48/625—Screws characterised by the ratio of the threaded length of the screw to its outside diameter [L/D ratio]
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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
- B29C48/395—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
- B29C48/40—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 two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
- B29C48/42—Non-identical or non-mirrored screws
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model relates to the technical field of rubber plastic machinery, in particular to a twin-screw extruder used for producing expanded plastic blanks. The twin-screw extruder comprises a chassis; a motor, a speed reducer and an extruding device are arranged on the chassis; the extruding device comprises an extruding cylinder; a machine barrel is sleeved at the front end of the extruding cylinder; twin extruding screws are mounted in the extruding cylinder; a screw driving gearbox is arranged at one end of the extruding cylinder; an extruding die head is arranged at the other end of the extruding cylinder; a feeding device is arranged in the vertical direction of the extruding device; the twin extruding screws comprise a long screw and a short screw that are arranged side by side and are different in length; the rear half part of the long screw is meshed with the integral short screw; the screw pitch of the rear half part of the long screw is the same as that of the integral short screw; the screw pitch of the front half part of the long screw is smaller than that of the rear half part of the long screw. Materials are premixed by the twin screws at the rear part and gas is exhausted, are extruded through a single screw at the front half part.
Description
Technical field
The utility model relates to the technical field of rubber and plastics machine, especially a kind of double screw extruder for the production of foamed plastic blank.
Background technology
In prior art, often utilize mill to produce foamed plastic blank, first the specific operation process of mill is that the raw material mixing is carried out to mixing and plasticizing, form to mix to refine and mould more uniform melting charge, by two rollers of mill, above-mentioned melting material roller is made to sheet stock again, the sheet stock of finally by operative employee, these rollers being made again cuts into the blank of one one.
The working environment of mill is open, well imagines that to utilize mill to produce the working environment of foamed plastic blank poor, and blank directly contacts with outside air, and blank can produce more bubble, and the yield rate of blank also can reduce accordingly.Mill simultaneously needs the manual mixing mixing materials of stirring in running, it is large that workman operates physical demands, labour intensity is high, and overturn the by hand number of times of mixing plastic sheet of workman is how many also larger to the mixing quality influence of raw material, therefore the quality of product is difficult to guarantee.
Summary of the invention
The technical problems to be solved in the utility model is: in order to solve the problem proposing in above-mentioned background technology, the utility model provides a kind of double screw extruder, it comprises and being arranged side by side and length screw rod that length is different, first the twin-screw by rear half carries out pre-refining Exhaust Gas to material, by single screw rod of front half, material is extruded, discharging is fine and smooth again, and yield rate is high, automaticity is large, and operating efficiency is high.
The utility model solves the technical scheme that its technical problem adopts: a kind of double screw extruder, there is underframe, on underframe, be provided with motor, reductor and extruding device, extruding device comprises packing cylinder, the front end sleeve of packing cylinder is provided with machine barrel, material extrusion twin-screw is installed in packing cylinder, and one end of packing cylinder is provided with screw drive gear-box, and the other end of packing cylinder is provided with material extrusion die head; In the vertical direction of extruding device, feed arrangement is installed, material extrusion twin-screw comprises and being arranged side by side and long bolt and short screw that length is different, the rear half of long bolt and the interlock of whole short screw phase, the rear half pitch of long bolt is identical with the pitch of whole short screw, and the front half pitch of long bolt is less than the rear half pitch of long bolt.
Screw drive gear-box comprises driving gear, idler gear and driven gear, the driving gear transmission that is meshed with idler gear, and the idler gear transmission that is meshed with driven gear, idler gear is arranged on long bolt, and driven gear is arranged on short screw.Long bolt and short screw are made counter rotating under the effect of idler gear and driven gear engaged transmission, and material is rotated to extruding.
On underframe, be provided with linear slide rail, on feed arrangement, be provided with and can make feed arrangement along linear slide rail, make the charging movable stand of straight reciprocating motion, on packing cylinder, be provided with and can make packing cylinder along linear slide rail, make the material extrusion movable stand of straight reciprocating motion.Charging movable stand plays the effect of support to feed arrangement, material extrusion movable stand plays the effect of support equally to packing cylinder.
On underframe, slide and be provided with finished product waggon, like this can so that the plastics blank of extruding from die orifice directly fall within on finished product waggon.
Material extrusion die head comprises die head and die orifice, and die head is fixed on packing cylinder, and die orifice is bolted on die head, and the size of die orifice is determined by user, self-emptying, and straight forming is without artificial cutting.
The beneficial effects of the utility model: this double screw extruder is mainly for the production of thermoplastic blanks such as polyethylene, and its working environment is airtight, material can not contact with outside air, and working environment is good; Extruder is also equipped with mould temperature controller, Hydraulic Station and electrical control cabinet etc., therefore have the characteristic of modular combination flexibly; Adopt twin-screw material extrusion, mixed performance is good, material first carries out pre-refining Exhaust Gas by the twin-screw of rear half phase interlock, therefore material can not produce bubble, material is extruded material by single screw rod of front half again, the twin-screw that is all less than the interlock of rear half phase due to the pitch of single screw rod of front half pitch separately, therefore discharging is more fine and smooth, yield rate is higher; The automaticity of extruder is higher, adopts mould discharging, and straight forming is without artificial cutting, therefore workman's labour intensity is low, and production efficiency is high.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the left view of Fig. 1;
Fig. 3 is the structural representation that in the utility model, material extrusion twin-screw matches with screw drive gear-box.
In figure: 1, underframe, 2, motor, 3, reductor, 4, packing cylinder, 5, machine barrel, 6, feed arrangement, 7, long bolt, 8, short screw, 9, driving gear, 10, idler gear, 11, driven gear, 12, linear slide rail, 13, charging movable stand, 14, material extrusion movable stand, 15, finished product waggon, 16, die head, 17, die orifice.
The specific embodiment
Double screw extruder as shown in Figure 1, Figure 2 and Figure 3, there is underframe 1, on underframe 1, be provided with motor 2, reductor 3 and extruding device, extruding device comprises packing cylinder 4, the front end sleeve of packing cylinder 4 is provided with machine barrel 5, material extrusion twin-screw is installed in packing cylinder 4, and one end of packing cylinder 4 is provided with screw drive gear-box, and the other end of packing cylinder 4 is provided with material extrusion die head; Feed arrangement 6 is installed in the vertical direction of extruding device, material extrusion twin-screw comprises and being arranged side by side and long bolt 7 and short screw 8 that length is different, the rear half of long bolt 7 and the 8 phase interlocks of whole short screw, the screw thread of long bolt 7 rear halves and the screw thread of whole short screw 8 are staggered, the thread groove of whole short screw 8 is stretched in the threaded portion of the rear half of long bolt 7, and the thread groove of the rear half of long bolt 7 is stretched in the threaded portion of whole short screw 8.The rear half pitch of long bolt 7 is identical with the pitch of whole short screw 8, and the front half pitch of long bolt 7 is less than the rear half pitch of long bolt 7.Material first carries out pre-refining Exhaust Gas by the twin-screw of rear half phase interlock, therefore material can not produce bubble, material is extruded material by the long bolt 7 of front half more subsequently, the twin-screw that is all less than the interlock of rear half phase due to the pitch of the long bolt 7 of front half pitch separately, therefore discharging is more fine and smooth, yield rate is higher.
Screw drive gear-box comprises driving gear 9, idler gear 10 and driven gear 11, driving gear 9 transmission that is meshed with idler gear 10, idler gear 10 transmission that is meshed with driven gear 11, idler gear 10 is arranged on long bolt 7, and driven gear 11 is arranged on short screw 8.Long bolt 7 and short screw 8 are made counter rotating under the effect of idler gear 10 and driven gear 11 intermeshing transmissions, thereby material is rotated to extruding.
On underframe, be provided with linear slide rail 12, on feed arrangement 6, be provided with and can make feed arrangement 6 along linear slide rail 12, make the charging movable stand 13 of straight reciprocating motion, on packing cylinder 4, be provided with and can make packing cylinder 4 along linear slide rail 12, make the material extrusion movable stand 14 of straight reciprocating motion.13 pairs of feed arrangements 6 of charging movable stand play the effect of support simultaneously, and 14 pairs of packing cylinders 4 of material extrusion movable stand play the effect of support equally.
On underframe 1, slide and be provided with finished product waggon 15, like this can so that the plastics blank of extruding from die orifice 17 directly fall within on finished product waggon 15.
Material extrusion die head comprises die head 16 and die orifice 17, and die head 16 is fixed on packing cylinder 4, and die orifice 17 is bolted on die head 16.The size of die orifice 17 is determined by user, adopts mould discharging, and straight forming is without cutting, therefore workman's labour intensity is low, and production efficiency is high.
The operation principle of this double screw extruder: within material adds the feeding cylinder of feed arrangement 6, the material extrusion twin-screw of extruding device first carries out pre-refining Exhaust Gas by the twin-screw of rear half phase interlock by material, material is rotated to extruding, change density of texture the Exhaust Gas of material, then by single screw rod of rear half, the very fine and smooth extruding of material is also finally directly extruded to blank by material extrusion die head.
The parameter of these each parts of double screw extruder:
One, the power of motor 2 is 15kw;
Two, reductor 3 adopts hard flank of tooth grinding worm, and gearratio is 1:200, and its noise is little, and the life-span is high, reliable;
Three, the material of long bolt 7 and short screw 8 is 38CrMoAlA high-quality nitrated steel, and the thickness of nitration case is 0.4～0.7mm, and nitrogenize hardness is 850～920HV;
Four, the feeding cylinder inner layer material of feed arrangement 6 is 40Cr and is coated with hard chrome, and internal layer has oil circuit interlayer steel plate, is provided with by oil cylinder and controls the feed cap opening or closing on feeding cylinder;
Five, the inner layer material of packing cylinder 4 is 40Cr and is coated with hard chrome, and internal layer has oil circuit interlayer steel plate;
Six, extruder also disposes mould temperature controller, Hydraulic Station and electrical control cabinet when concrete use, wherein Hydraulic Station has six magnetic valves to control respectively 12 oil cylinders, wherein two-way has pressurizer, control respectively the locked mode up and down of feeding cylinder and the locked mode up and down of packing cylinder 4, another two-way is controlled respectively opening or closing of feed cap and upper die head, and speed is adjustable, also have two-way to control respectively upper die head and lower die head locking or release.The operating pressure of Hydraulic Station is 12MPa, and hydraulic oil is 46# antiwear hydraulic oil, and volume is about 100 liters.On the electric cabinet panel of electrical control cabinet, be provided with start button, stop button, inching button and emergency stop push button, be also provided with a plurality of indicator lamps.
The concrete operation step of this double screw extruder:
One, first whether each system is normal in checkout facility, and water route, whether oil circuit is unimpeded and do not leak, and whether electric system is normal, and whether heating system, temperature control system and various instrument reliable operation, and as found, fault should get rid of in time;
Two, before start, dynamical system, feeding cylinder, packing cylinder 4, machine barrel 5 and die head 16 are closed up respectively and locked;
Three, open heating power supply barrel, machine barrel 5 and die head 16 are carried out to heat temperature raising, when temperature is raised to the required temperature of normal production, insulation 10min left and right, so that machine each several part temperature tends towards stability, can drive to produce;
Four, start driving button, motor 2 starts, by reductor 3 speed changes, drive long bolt 7 and short screw 8 rotations, machine enters normal operating conditions, the blowing temperature of material is 150 ℃ of left and right, the extrusion temperature of material is less than 105 ℃, if find that machine has anomaly when work, should press rapidly emergency stop push button;
Five, stop heating, by the plastics burnishing-in in extruder, powered-down, stop heating, feeding cylinder, packing cylinder 4, machine barrel 5 and die head 16 are carried out to release, and open die head 16, cleaning comprises the heels on twin-screw in machine, cleans out rear machine to be closed up and locked mode.
Claims (5)
1. a double screw extruder, there is underframe (1), on underframe (1), be provided with motor (2), reductor (3) and extruding device, described extruding device comprises packing cylinder (4), the front end sleeve of packing cylinder (4) is provided with machine barrel (5), packing cylinder is provided with material extrusion twin-screw in (4), and one end of packing cylinder (4) is provided with screw drive gear-box, and the other end of packing cylinder (4) is provided with material extrusion die head; Feed arrangement (6) is installed in the vertical direction of extruding device, it is characterized in that: described material extrusion twin-screw comprises and being arranged side by side and long bolt (7) and short screw (8) that length is different, the rear half of described long bolt (7) and whole short screw (8) phase interlock, the rear half pitch of long bolt (7) is identical with the pitch of whole short screw (8), and the front half pitch of long bolt (7) is less than the rear half pitch of long bolt (7).
2. double screw extruder according to claim 1, it is characterized in that: described screw drive gear-box comprises driving gear (9), idler gear (10) and driven gear (11), described driving gear (9) transmission that is meshed with idler gear (10), idler gear (10) transmission that is meshed with driven gear (11), it is upper that idler gear (10) is arranged on long bolt (7), and driven gear (11) is arranged on short screw (8).
3. double screw extruder according to claim 1, it is characterized in that: on described underframe (1), be provided with linear slide rail (12), on described feed arrangement (6), be provided with and can make feed arrangement (6) along linear slide rail (12), make the charging movable stand (13) of straight reciprocating motion, on described packing cylinder (4), be provided with and can make packing cylinder (4) along linear slide rail (12), make the material extrusion movable stand (14) of straight reciprocating motion.
4. double screw extruder according to claim 1, is characterized in that: the upper slip of described underframe (1) is provided with finished product waggon (15).
5. double screw extruder according to claim 1, is characterized in that: described material extrusion die head comprises die head (16) and die orifice (17), and it is upper that die head (16) is fixed on packing cylinder (4), and die orifice (17) is bolted on die head (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320483687.XU CN203418742U (en) | 2013-08-08 | 2013-08-08 | Twin-screw extruder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320483687.XU CN203418742U (en) | 2013-08-08 | 2013-08-08 | Twin-screw extruder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203418742U true CN203418742U (en) | 2014-02-05 |
Family
ID=50017844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320483687.XU Expired - Fee Related CN203418742U (en) | 2013-08-08 | 2013-08-08 | Twin-screw extruder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203418742U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103407145A (en) * | 2013-08-08 | 2013-11-27 | 常州市吉沃橡塑机械有限公司 | Double-screw extruder |
| CN110576528A (en) * | 2019-10-30 | 2019-12-17 | 六安正辉优产机电科技有限公司 | Forming die head of plastic granulator |
-
2013
- 2013-08-08 CN CN201320483687.XU patent/CN203418742U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103407145A (en) * | 2013-08-08 | 2013-11-27 | 常州市吉沃橡塑机械有限公司 | Double-screw extruder |
| CN110576528A (en) * | 2019-10-30 | 2019-12-17 | 六安正辉优产机电科技有限公司 | Forming die head of plastic granulator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140205 Termination date: 20210808 |