CN102303378A - Thermal-state crushing process for phenolic molding compounds - Google Patents

Abstract

The invention discloses a thermal-state crushing process for phenolic molding compounds. The thermal-state crushing process comprises the following steps of: firstly, heating, rolling and plasticizing the raw materials of the phenolic molding compounds into sheets by a dual-roller mill; secondly, stripping off the material sheets from the surface of the roller, cutting the material sheets into small material pieces by a slicing device and immediately sucking the thermal-state material pieces at negative pressure into a reequipped hammer type crusher with a horizontal-wide vibrating screen by a high-pressure blower to crush; and thirdly, crushing and cooling the materials by using the conveying wind while crushing the materials, and sucking the crushed material powder into a storage bin to form finished products; and after the phenolic molding compounds are cut into the small material pieces, all the transportation, the crushing process and the cooling process are carried out in sealed negative-pressure pipelines and equipment. Fine powder is unlikely to be produced when the material sheets are beaten at the thermal state by a hammer, and the material pieces are crushed and cooled, so the quantity of the generated fine powder is reduced remarkably, the content of the fine powder with more than 80 meshes is less than 10%, and the product particles are uniform and the energy consumption is reduced; moreover, the transportation, the crushing process and the cooling process are carried out in pipelines and equipment at the sealed negative-pressure state, so that the production environment is optimized.

Description

The hot disintegrating process of phenolaldehyde moulding compound

Technical field

The present invention relates to the hot disintegrating process of a kind of phenolaldehyde moulding compound, belong to the phenolaldehyde moulding compound manufacture field.

Background technology

At present; After the two roller mills of phenolaldehyde moulding compound production overwhelming majority employing at home and abroad are moulded sheet to raw material heating roll-in refining; With perching knife the phenolaldehyde moulding compound that the roll-in refining is moulded sheet is peeled off from roller surface, be cut into little tablet, again through fully pulverizing after the cooling with slicing device.The cooling procedure of tablet is employed in the course of conveying mostly, the cooling while carrying.For tablet is fully cooled off, adopt mostly prolong cool time, to measures such as tablet blowings; Carry cooling device that belt conveyor, guipure cooling device etc. are arranged.Owing to adopt above measure and device, not only need take big place, and the production environment dust from flying.Producer is also arranged in order to prolong cool time, to practice thrift the place; Adopt belt conveyor, horizontal vibration Transport Bed and vertical vibration Transport Bed to combine; And impose on air-cooled method; But not only cause production environment dust from flying and vibrating noise, and in the vibrating transportation process, also can produce fine powder.And, because tablet repeatedly repeats to pulverize under cold conditions, make product particle irregular, contain the fine powder amount height, the above fine powder content of 80 orders is up to 25～30%, and working (machining) efficiency is low, and energy consumption is high.

Summary of the invention

The present invention is intended to propose that a kind of product particle is more even, and it is few to contain fine powder amount, the phenolaldehyde moulding compound production method that the production environment dust is few, the hot disintegrating process of a kind of phenolaldehyde moulding compound.

The hot disintegrating process of this phenolaldehyde moulding compound is that the phenolaldehyde moulding compound raw material are moulded sheet through two roller mill heating roll-ins, refining; With perching knife tablet is peeled off from roller surface; After slicing device is cut into the small powder sheet; Promptly hot tablet negative pressure is sucked through the horizontal wide shape vibratory sieve beater disintegrating machine of repacking and pulverize with high pressure positive blower; When pulverizing; Utilize and carry wind to cool off while pulverizing; Powder after the pulverizing sucks feed bin and is finished product, and phenolaldehyde moulding compound is cut in pipeline and the equipment that conveying, pulverizing, cooling procedure behind the small powder sheet all be in the sealing negative pressure state and carries out.

The hot disintegrating process of this phenolaldehyde moulding compound is difficult for producing fine powder when hit by hammer leaf owing to tablet, and tablet cools off while pulverizing, and fine powder obviously reduces, and product particle is even, and energy consumption reduces; And, because all being in pipeline and the equipment of sealing negative pressure state, conveying, pulverizing, cooling procedure carry out, production environment is optimized.

Description of drawings

Fig. 1 is a process chart of the present invention;

Fig. 2, Fig. 3 are the beater disintegrating machine structural representation;

Fig. 4 is a hammer leaf fixed structure sketch map;

Fig. 5 is a hammer leaf Wear-resistant Treatment sketch map.

The specific embodiment

As shown in Figure 1; The hot disintegrating process of this phenolaldehyde moulding compound be with the phenolaldehyde moulding compound raw material after two roller mills 100 heating roll-ins refinings are moulded sheet; With perching knife (off-chip device) 201 tablet is peeled off from roller surface; Deliver to slicing device 203 by belt conveyor 202 and be cut into little tablet; By pipeline 300 usefulness high pressure positive blowers hot tablet negative pressure is sucked through the horizontal wide shape vibratory sieve beater disintegrating machine 400 of repacking immediately then and pulverize; When pulverizing; Rely on and carry wind to cool off while pulverizing; Along with diminishing of particle diameter; Cooling velocity is accelerated, and powder can fully be cooled off.Powder after the pulverizing sucks feed bin promptly becomes finished product, and phenolaldehyde moulding compound is cut in pipeline and the equipment that conveying, pulverizing, cooling procedure behind the small powder sheet all be in the sealing negative pressure state and carries out.High pressure positive blower and feed bin do not draw among the figure at the afterbody of system.

As shown in Figures 2 and 3, used horizontal wide shape vibratory sieve beater disintegrating machine comprises parts such as rotor 401, hammer leaf 402, sieve sheet 403, body 404, vibrating motor 405 and main motor 406 in the hot disintegrating process of this phenolaldehyde moulding compound.It is long-pending that horizontal wide shape vibratory sieve beater disintegrating machine has bigger compass screen surface, is 1.25～2 times of common beater disintegrating machine, is blade type, toothed disc type, turbine type pulverizer 5～6 times; Horizontal wide shape structure has been improved the angle between the powder direction of motion and sieve aperture, has changed the state of material circular motion, and material is repeatedly rebounded by sieve, has increased effective strike composition; Vibratory sieve has improved the ability of in time sieving of qualified particle effectively, has significantly reduced to cross crushing phenomenon, makes product particle even, and powder containing quantity reduces.The present invention has done change to the wide shape vibratory sieve of this horizontal stroke beater disintegrating machine, as shown in Figure 4, changes flail knife into fixedly hammer leaf, and two the Kong Jieyong hammer leaf pins 407 with hammer leaf 402 fix with rotor 401 exactly; Hammer leaf quantity reduces to 10～30 from 80～120; As shown in Figure 5, the face that impacts of hammer leaf is with the method intensive treatment of carbide alloy 408 built-up welding, and hard alloy overlay welding intensive treatment scope accounts for more than 2/3 of hammer leaf length.The effect of doing such change is ability proper extension cooling, the pulverizing time of tablet in pulverizing chamber, can effectively avoid crushing phenomenon simultaneously, and prolonged the service life of hammer leaf greatly.The rotating speed adjustable adjusting range of the rotor of the wide shape vibratory sieve of this horizontal stroke beater disintegrating machine is 750～1450 rev/mins; Screen frame amplitude 1～3mm; Sieve diameter 2～5mm can choose according to the requirement to particle; Screen frame vibration frequency 1500 times/minute.

With the SK-550 production line is example; Selecting the horizontal wide shape vibratory sieve beater disintegrating machine of XG60 * 50 types is parent; Main motor changes 4 utmost point 15kw into; Vibrating motor 2.2kw; Off-chip and belt conveyor 1.5kw, hobboing cutter slicing device 1.5kw, negative pressure suction blower fan 11kw, equipment installation general power is less than 65% of traditional handicraft.The concrete quantity of hammer leaf and rotor speed can require to choose and adjust according to product particle and output.For example product grade is the mould pressing powder of D141, and the requirement of particle is≤2mm, and when output was 1000kg/h, hammer leaf can be used 30, optional 1450 rev/mins of rotating speed, and sieve diameter can be taken as 2mm; Product grade is a 1161J injection moulding powder, and the requirement of particle is for≤3mm, when output is 1000kg/h, and hammer leaf can be used 20, and optional 900 rev/mins of rotating speed, sieve diameter can be taken as 3mm; Product grade is the high strength phenolaldehyde moulding compound of PFS-868, and the requirement of particle is for≤5mm, when output is 1000kg/h, and hammer leaf can be used 10, optional 750 rev/mins of rotating speed, and sieve diameter can be taken as 5mm.The product particle that production obtains is even; There are not underproof thick sheet or bulky grain; The above fine powder content of 80 orders is below 10%; Can pack the product of most specifications and to dispatch from the factory; Fine powder content is required extra high product; After the road, back is provided with simple fine powder separator, can reach requirement, fine powder content can be controlled between 5～7%.

Claims (2)

1. hot disintegrating process of phenolaldehyde moulding compound; It is characterized in that the phenolaldehyde moulding compound raw material are moulded sheet through two roller mill heating roll-in refinings; With perching knife tablet is peeled off from roller surface; After slicing device is cut into the small powder sheet; With high pressure positive blower hot tablet negative pressure is sucked through the horizontal wide shape vibratory sieve beater disintegrating machine of repacking immediately and pulverize; When pulverizing; Utilize and carry wind to cool off while pulverizing; Powder after the pulverizing sucks feed bin and is finished product, and phenolaldehyde moulding compound is cut into the conveying behind the small powder sheet; Pulverize; Cooling procedure all is in pipeline and the equipment of sealing negative pressure state carries out.

2. the hot disintegrating process of phenolaldehyde moulding compound as claimed in claim 1 is characterized in that the flail knife of the wide shape vibratory sieve of described horizontal stroke beater disintegrating machine changes fixedly hammer leaf into; Hammer leaf quantity reduces to 10～30; Hammer leaf impacts the method intensive treatment of face with hard alloy overlay welding, and hard alloy overlay welding intensive treatment scope accounts for more than 2/3 of hammer leaf length; 750～1450 rev/mins of rotational speed regulation scopes; Screen frame amplitude 1～3mm; Sieve diameter 2～5mm.

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