CN2285684Y

CN2285684Y - Plastic powder pulverizator

Info

Publication number: CN2285684Y
Application number: CN 96245362
Authority: CN
Inventors: 李正仁; 端木金庚
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-11-03
Filing date: 1996-11-03
Publication date: 1998-07-08
Anticipated expiration: 2006-11-03

Abstract

The utility model provides a plastic powder disintegrator, which is composed of a raw material bucket, a feeder, a two-stage disintegrating device, an air draft system, a cyclone separator, a grading sieve, a freezing water cooling device and an electric control system. The utility model is mainly characterized in that the utility model adopts an air and water double-cooling and two-stage closed cycle disintegrating mode, and the utility model can disintegrate organic materials with heat sensitivity to be fine powder products with less than 60 meshes. Since the utility model adopts the two-stage closed cycle disintegrating mode, the utility model not only improves production efficiency and reduces production cost, but also improves the distribution range of grain sizes of disintegrating materials, reduces the proportion occupied by superfine powder, and improves the quality of plastic powder products.

Description

Crushig machine for plastics

The utility model relates to a kind of attritive powder pulverizer, the particularly a kind of pulverizer that can pulverize thermoplastic is applicable to bigger materials of heat sensitivity such as PE, PVC, EVA, nylon, medicine, is ground into particle diameter less than 250 microns (60 orders) following attritive powder product

Before, pulverize thermoplastic and heat sensitivity material and generally adopt the deep cooling pulverizer, this pulverizer is sheared by the blade cutlery, machine and material to be enclosed in the space, being chilled to subzero more than 100 degrees centigrade low temperature with liquid nitrogen just can pulverize, the cost height, yield poorly, the single-stage vortex blade-type of employing or abrasive disk type pulverizer are also arranged, but Granularity Distribution is wide, thickness is inhomogeneous, output low along with metal surface powder plastics coating and Technology of Rotational Powder Molding and clothing hot melt adhesive to the increasing sharply of plastic powders requirement, be badly in need of wanting a kind of processing cost low, the output height, the pulverizer of even particle size distribution

The purpose of this utility model just provides a kind of Crushig machine for plastics, and it can be near under the normal temperature, and high efficiency is ground into thermally sensitive organic materials the attritive powder product of even particle size distribution at low cost.

The purpose of this utility model is achieved like this: the mode that adopts the two-stage closed cycle to pulverize is improved the particle size range of crushed material and is enhanced productivity: adopt exhausting and chilled water device that comminuting matter and mill are carried out exchange heat, temperature of charge is controlled at is unlikely softening in the proper range and changes performance

Below in conjunction with accompanying drawing the utility model is described in further detail

Fig. 1 is principle of the present utility model and flow chart

Fig. 2 is a profile front view of the present utility model

Fig. 3 is the profile of pulverizer pulverizing chamber

According to Fig. 1, material enters first level flour crushing device (3) by former hopper (1) through feed appliance (2), material after the coarse crushing with air exhauster (4) by the road (5) be drawn onto in the cyclone separator (6), cutting down (7) through rotation then falls in the classifying screen (8), having the half crushed material to sieve approximately to reach the grinding particle size oversize to enter second patent flour crushing device (9), to carry out fine powder broken, return classifying screen (8) material cyclic process in loop through air draught pipeline (10) again after the pulverizing, in time separated until the fine powder that is ground into after suitable granularity is pulverized owing to one-level, semi-finished product enter the second patent flour crushing device again, and to carry out fine powder broken, so can reduce fine powder, improve the particle size range of crushed material

According to Fig. 2, the main motor (22) of two-stage reducing mechanism and the bearing block (23) of final drive shaft are fixed on the lower support plate of frame (21), main motor drives final drive shaft by belt pulley and does to rotate at a high speed that the shell of two-stage reducing mechanism is separately fixed at the outer end one-level air draft pipe (5) of two bearing blocks and the lower end of secondary air draft pipe (10) is communicated with first level flour crushing device (3) and second patent flour crushing device (9) respectively, the upper end is the be connected upper end of cyclone separator (6) of herringbone and cyclone separator (6) and is connected with air exhauster (4) by pipeline, the lower end is fixed on the upper bearing plate of frame (21), and with rotary valve (7) mutually way rotary valve be connected a jiao of classifying screen (8) on classifying screen is hung in frame with 4 steel wire ropes the upper bearing plate with classifying screen (8) with flexible pipe finished product flour extraction pipe (24) arranged, connecing the packaging bag diagonal angle during pulverizing is export of goods in process of manufacture pipe (25), it faces the former hopper of charging aperture (1) of second patent flour crushing device and the bearing of feeder (2) is fixed on the column of frame, and feeder (2) is facing to the charging aperture of first level flour crushing device (3)

Below in conjunction with Fig. 3, the structural charge tube (13) that further specifies reducing mechanism is screwed outside static cutting disk (15) at cover plate (14) and is screwed inboard in cover plate (14), the back side at static cutting disk is provided with annular water tank, clean water is cooled to Celsius below 8 ℃ by a cover refrigerator (11), the interior circulating cooling machine cover plate (14) of static cutting disk that feeds the two poles of the earth reducing mechanism simultaneously is fixed on casing (16) with screw and goes up the end of movable grinding disc (18) with screw fixed conveyor axle (17), is done to rotate at a high speed by main driven by motor.In order to improve the service life of mill, the card of movable grinding disc is designed to two-sided indent taper, the card of static cutting disk is designed to planar shaped.Tooth bar quantity on movable grinding disc (18) and the static cutting disk (15) is 480～720, the addendum angle of every tooth is that 43～46 degree have air inlet at the back side of casing (16), air-suction duct (19) is fixed on the back side of casing, having suction opeing (20) at the oblique upper of casing is connected with secondary exhausting pipeline (10) with one-level exhausting pipeline (5) respectively, exhausting system sucks pulverizing chamber with cold air from air-suction duct (19) and is used for cooling off mill and material, the interior raw material of material suction cyclone separator (6) after will pulverizing simultaneously enters pulverizing chamber from feeding cylinder (13), in pulverizing chamber by the mill high speed shear, impact, fragmentation is carried out in friction, and the heat that friction and collision produce is in time exchanged and is taken away, remain the proper temperature of pulverizing chamber, thereby realized the pulverizing purpose

From the above mentioned, the utility model is owing to adopt wind, the two cold two-stage closed cycle processing modes of water, so Compare with existing pulverizer and to have the following advantages: the one, improved the distribution of the granularity of crushed material, subtract Lacked the ratio of crossing fine powder, the size distribution of crushed material is tending towards evenly, the 2nd, improved production efficiency, fall Low processing cost is convenient to application.

Claims

1. Crushig machine for plastics, it comprises former hopper (1), feed appliance (2), air exhauster (4), cyclone separator (6), (7) are cut down in rotation, classifying screen (8), frame (21), electric-control system (12), it is characterized in that also comprising first level flour crushing device (3), second patent flour crushing device (9), one-level exhausting pipeline (5), secondary exhausting pipeline (10), wherein the two-stage reducing mechanism is contained on the lower support plate of frame (21) side by side, the lower end of two-stage exhausting pipeline is connected with the casing of two-stage reducing mechanism respectively, and the upper end is herringbone and converges with cyclone separator (6) and be connected

2. Crushig machine for plastics according to claim 1 is characterized in that first level flour crushing device (3) and second patent flour crushing device (9), provides recirculated cooling water by same set of chilled water device (11).

3. according to claim 1 and 2 described Crushig machine for plastics, the card that it is characterized in that the movable grinding disc (18) of first level flour crushing device (3) and second patent flour crushing device (9) is two-sided indent taper, and the card of static cutting disk (15) is a planar shaped.

4. Crushig machine for plastics according to claim 3 is characterized in that the tooth bar quantity on movable grinding disc (18) and the static cutting disk (15) is 480～720

5. Crushig machine for plastics according to claim 4, the addendum angle that it is characterized in that movable grinding disc (18) and last every the tooth of static cutting disk (15) are 43～46 degree