CN2057138U

CN2057138U - Plastic pelletizer

Info

Publication number: CN2057138U
Application number: CN 89206291
Authority: CN
Inventors: 曹志文; 候玉科; 王金保
Original assignee: BAOJI ENERGY SAVING EQUIPMENT FACTORY SHAANXI PROV
Current assignee: BAOJI ENERGY SAVING EQUIPMENT FACTORY SHAANXI PROV
Priority date: 1989-04-25
Filing date: 1989-04-25
Publication date: 1990-05-16

Abstract

The utility model relates to a plastic granulator, in particular to the utility model of the plastic granulator having great compression ratio and small long diameter ratio. The interior of the barrel of the plastic granulator is provided with a flow distribution type pin nail type screw having equal distance and unequal depth; the screw channel depth of the feeding section is between 18 millimeters and 24 millimeters, and the interior of the screw channel of the measuring section is arrayed and provided with a plurality of cylindrical pin nails having phi 4 diameters in a definite direction. When the long diameter ratio of the screw is between 10 and 13, the conveying capacity of the solid solution of the rod and the plasticization effect are the best. The front end of the barrel is provided with a manifold extruder head having great capacity; when the compression ratio is 11.5, the pressure flow rate of plastic solution is stable, and the extruded strip material are uniform and compact; the yield reaches 80 kg per hour (measured through polyethylene); the energy consumption of the specific yield is kg/0.2 DEG; the plastic granulator is in the best working state at this time.

Description

Plastic pelletizer

The utility model relates to a kind of improved plastic granulator.The plastic granulator of particularly a kind of big compression ratio, little draw ratio.It is suitable for the granulation of various thermoplastics and waste or used plastics.

At plastic industry plastics are processed into from powdery the granular process, plastic granulator is the main corollary equipment that unit is produced in granulation.Known plastic granulator, three its compression ratios of hair style plastic granulator of producing as Shanghai City high bridge plastics machinery factory are 3:1, draw ratio is the 5:1(screw rod), during yield in unit time 40Kg/, (calculating) with the PEF powder.The SJ-90A plastic granulator compression ratio 3.5:1 that Jiamusi Machinery Plant of Light Industry produces, draw ratio 20:1 is during output 50Kg/.State-run Dalian Jingshan Ventilation Equipment Factory introduction day present technique) the useless film of producing of SZZ55 * 13 plastics reclaims its compression ratio of comminutor 4:1, and draw ratio 15:1 is during output 35-40Kg/.Than the plastic granulator of the above, their common feature is that compression ratio is little, and draw ratio is big.According to the introduction of plastics technical journal, the normal compression ratio that adopts is below 5:1, and screw slenderness ratio is between 20-35:1.The trend that present and oriented big draw ratio develops.Because screw slenderness ratio is big, certainly will cause spiro rod length to increase, the processing and manufacturing difficulty, cost improves; And reduced the physical mechanical strength of screw rod.Quicken the wearing and tearing of screw rod and machine barrel, shortened the service life of plastic granulator; It is supporting to increase power, and the capability of energy dissipation of specific yield is risen.The head compression ratio is little, makes plastic solution pressure, flow velocity instability, is difficult to control, and discharging produces non-uniform phenomenon.Therefore limited using and developing of plastic granulator.

Task of the present utility model provide a kind of can the processing thermoplastic raw material, can process the plastic granulator that reclaims waste or used plastics again.Its main purpose is the compression ratio that increases the comminutor extruder head, dwindles screw slenderness ratio, improves output 15-20%, reduces the per unit area yield energy consumption.(the standard 0.225KW/Kg of China National Light Industrial Products Department) provides a kind of volume little, and processing and manufacturing is easy, long service life, cheap plastic granulator.

Its solution is that the plastic granulator main working parts adopts the bypass type screw rod under the prerequisite that satisfies the plastic granulating quality, and draw ratio is at 10-13; structure is the saltant screw rod, does not equidistantly wait deeply, strengthens the feeding section spiral groove depth; the feeding section volume is increased, to improve the conveying capacity of solid.Adopt big volume handpiece structure simultaneously, compression ratio 11.5, accelerated the plasticizing rate of plastics, improve output more than 15-20%.

Further improvement of the utility model is to strengthen plastic granulating machine head cavity volume (being common two times), and volume is at 245-255cm ³Between, plastic solution is got back at head once plastify, improve the compaction rate of plastic products.Head cavity two ends are set to open wide the detachable structure, are plug with the M36 bolt, make the head clearance time be reduced to present 10 minutes from common 1 hour, have reduced the replacing number of times of filter screen.

The compression section spiral groove depth that the further improvement of the utility model is a screw rod is a gradation type, and its compression ratio is progressively isolated screw metering section and feeding section solid and solution, dissolves.Be provided with 43 of garden cylindricality φ 4 pins in the metering section screw channel, and move towards arranged according to certain rules, to strengthen the abundant stirring and the plasticizing of metering section plastic solution along screw channel.And the feeding section spiral groove depth is between 18-24mm, and pitch is at 90-95mm, and the feeding section total length is at 460-480mm, and the metering section spiral groove depth can reach the optimum Working of plastic granulator at 2.5-3.5mm.

The utility model has the advantages that, changed the big structure of draw ratio of traditional screw rod, get less draw ratio on the contrary, improved the mechanical strength of screw rod, make processing and manufacturing easy, cost reduces.Supporting power reduces under identical condition, and granulation output height reaches the plasticizing quality requirement equally.Another advantage of the present utility model is to improve the compression ratio of head, adopts the manifold-type structure, makes plastic solution at head internal pressure flow speed stability, and pressure distribution balance, plastic products apparent density are evenly enriched.Overcome the uneven situation of small reduction ratio plastic granulator billot thickness.

Description of drawings:

Fig. 1 is the structure chart of plastic granulator when being in the operating position;

Fig. 2 is the part drawing of bypass type screw rod;

Fig. 3 is the head longitudinal sectional drawing along (accompanying drawing 1) 1-1 line.

Embodiment:

The invention is further described below with reference to accompanying drawing:

With reference to Fig. 1, the frame 1 of the frame structure that is welded by the shape material, a JZ-250 type of device reductor 2 on it, dragged by motor 3, reductor is connected by flange 5 with bypass type screw rod 4, and screw rod is to rotate in machine barrel 6, supporting base 7 and rear bearing block 8 also were installed on the frame with bolt 9 before the machine barrel outer wall was provided with, the length direction of machine barrel outer wall is equipped with three sections heater elements 10, and the front end of machine barrel has head 11 with bolt device, and frame 1 is provided with electrical equipment control button 12.With reference to accompanying drawing 2 are part drawings of accompanying drawing 1 main working parts screw rod, L _ASection is a feeding section, and its length is 469mm; L _BBe the compression section, its length is 386mm; L _CBe metering section, its length 307mm.43 pins of certain diameter are installed in the metering screw channel, 1162 millimeters of the effective active lengths of bypass type screw rod, 96.5 millimeters of external diameters, its draw ratio is between the 10-13.Feeding section L _ASpiral groove depth 18-24 millimeter.From metering section L _CLatter end is to feeding section L _AThe compression section spiral groove depth of beginning section be progressively deepening with reference to accompanying drawing 3, guiding core rod 13 usefulness bolts 14 are installed on the housing 15, and with flat key 16 make the guiding core rod 13 in housing 15, locate, shunting sieve plate 17 is installed in the housing 15, and granulating head 18 usefulness connecting bolts 19 are connected with guiding core rod 13 rectangular patterns.Heating element heater 20 is wrapped in housing 15 and granulating head 18 outer walls respectively, and pellet head is assemblied on the machine barrel by the screw thread in the housing 15.The plastic granulator screw compression is than being 6-8, and draw ratio is 10-13, head cavity volume 245-255cm ³The time, this machine is in normal operating conditions.When compression ratio is 7, draw ratio is 12.5, head cavity volume 250cm ³The time, output 80Kg, specific yield power consumption--1Kg/0.2 degree electricity, this moment, this machine was in optimum Working.

Claims

1, plastic granulator; the plastic granulator of particularly big compression ratio, little draw ratio; it is to be the plastic granulator that critical piece assembles by frame, extruder head, drive transfer and heater; it is characterized in that machine barrel anterior device one big volume manifold-type head; its compression ratio 11.5, volume is at 245～255cm ³Between, a bypass type peg type that can rotate freely is housed in the machine barrel does not equidistantly wait dark screw rod, its draw ratio is between 10-13, the public axial line of machine barrel and head is to be parallel to ground and to be installed on the framework platform, screw rod is connected with flange with reducer output shaft, and its power then is to be passed to by rack-mounted motor.

2, according to the described plastic granulator of claim 1, it is characterized in that: the cavity volume of manifold-type head is 250cm ³

3, according to the described plastic granulator of claim 1, it is characterized in that: the bypass type screw rod segment length 469mm that feeds in raw material, spiral groove depth 22.6mm; metering segment length 307mm, spiral groove depth 3mm, compression segment length 386mm; from shallow to deep, its compression ratio is 7 to spiral groove depth from the metering section to the feeding section.

4, by claim 1 or 2 described plastic granulators, it is characterized in that: shunting sieve plate and guiding core rod are installed in the housing, and granulating head is connected with the rectangular formula of conduction core rod.

5, according to the described comminutor of claim 1, it is characterized in that: head cavity two ends are set to us and open the detachable structure, and are plug with the M36 bolt.