CN111469260B

CN111469260B - Gypsum block produced and prepared by dry method

Info

Publication number: CN111469260B
Application number: CN202010351646.XA
Authority: CN
Inventors: 王安全
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-28
Filing date: 2020-04-28
Publication date: 2022-04-12
Anticipated expiration: 2040-04-28
Also published as: CN111469260A

Abstract

The invention discloses a gypsum block prepared by dry method production, the whole shape of the gypsum block is a rectangle, the length range is 800mm, the width range is 250mm and the thickness range is 80-250mm, the gypsum block is characterized in that 68-76 parts by mass of semi-hydrated gypsum powder is used as a main material, 4-8 parts by mass of fiber material, 0.05-0.2 part by mass of retarder material and 20-25 parts by mass of mixing water are added, mixed and stirred uniformly, then the mixture is extruded by an extruder to form a strip-shaped gypsum plate material, and the strip-shaped gypsum plate material is cut twice. The invention can be used for dry production and preparation of gypsum blocks, can realize production line automatic production, and has the advantages of simple preparation material, simple process, high product strength, good quality, good process feasibility and the like.

Description

Gypsum block produced and prepared by dry method

Technical Field

The invention belongs to the technical field of industrial gypsum production and recycling, and particularly relates to a dry production preparation technology of an industrial byproduct gypsum building block.

Background

Gypsum, the main component of which is calcium sulfate, includes natural gypsum and industrial gypsum. The industrial gypsum, also called industrial byproduct gypsum, is a byproduct in some industrial production processes, mainly comprises two types, namely phosphogypsum and desulfurized gypsum, wherein the phosphogypsum accounts for more than half of the industrial byproduct gypsum. At present, the accumulated quantity of industrial by-product gypsum in China exceeds 3 hundred million tons, wherein the phosphogypsum reaches more than 2 hundred million tons. The industrial by-product gypsum is piled up in large quantity, which not only occupies land, but also wastes resources, and the contained acidity and other harmful substances easily cause pollution to the surrounding environment, thus becoming an important factor restricting the sustainable development of phosphate fertilizer enterprises in China. The efficiency of developing and recycling the industrial byproduct gypsum is low at present, and the comprehensive utilization rate is only about 38%; therefore, the development of a secondary utilization technology of industrial by-product gypsum is still a subject of considerable research.

The industrial by-product gypsum product is a gypsum block, a gypsum brick, a gypsum board, a gypsum large wallboard, a plastering gypsum, a gypsum paper and other products which are prepared by taking industrial by-product gypsum as a main material. Because the industrial byproduct waste can be recycled, the industrial byproduct gypsum product has lower production cost, better economic value and great significance in environmental protection, and has wider development and utilization prospect. Particularly, gypsum boards (also called gypsum blocks) and gypsum blocks are widely applied to buildings, and the existing gypsum blocks and blocks are usually produced by adding water into gypsum, stirring the gypsum into slurry, and then casting the slurry, which is called wet production or slurry production. The product produced by the production method needs to be dried after being formed, the process is complex, the energy consumption is high, the energy-saving effect is poor, and the obtained product has low density and poor quality.

The inventor has previously applied for a production process of a full dry method desulfurized gypsum building material product of CN200710092850, and discloses that water with a crystal water ratio is directly added into anhydrous gypsum and semi-hydrated gypsum, and the anhydrous gypsum and the semi-hydrated gypsum are processed and formed in a high-pressure mode. Compared with wet production, the process is simpler, does not need drying, and the prepared product has higher density and better quality. But also has the defects of higher requirements on production equipment, more complex process and higher difficulty in controlling the quality of products.

CN201711112428 discloses a gypsum board and a preparation method thereof, and the gypsum board is produced by adopting an extrusion method in the patent, so that the process is simple. However, the gypsum board obtained by the method is obtained by adopting gypsum powder, various auxiliary materials and resin adhesive, and is bonded by the resin to provide bonding force, so that the board has low integral strength and poor quality.

In addition, CN200610127778 discloses a method for producing gypsum building products by using extrusion process, in which the gypsum product is produced by adding water to semi-hydrated gypsum and then extruding by means of an extruder, and the process is simpler. However, the following drawbacks still exist in this patent: 1 the process method has complex raw material formula components, and in addition to the gypsum powder, filler powder and various additives are added, so that the process complexity is increased, and the production cost is higher. 2 the process formula is added with the filler powder such as fly ash, fine sand and the like, and the plasticizer is also added as a setting material, if water is added in advance for mixing and stirring, the setting reaction is easy to generate and the process fluidity is influenced, so the process adds the mixing water at the position of an extrusion opening, but the water is difficult to be fully mixed and reacted with the semi-hydrated gypsum to generate the dihydrate gypsum, and the product quality is greatly reduced. 3 the process does not disclose the specific structure of the extruder and the device for conveying and cutting the parts, and has poor practicability.

In conclusion, how to provide a dry method gypsum block production technology with simple raw materials, simple process, higher product quality and good feasibility becomes a problem to be considered and solved by technical personnel in the field.

Disclosure of Invention

Aiming at the defects of the prior art, the technical problems to be solved by the invention are as follows: the gypsum block prepared by dry production has the advantages of simple preparation material, simple process, high product strength, good quality and good process feasibility.

In order to solve the technical problems, the invention adopts the following technical scheme:

a gypsum block prepared by a dry method is characterized in that the gypsum block is prepared by taking 68-76 parts by mass of semi-hydrated gypsum powder as a main material, adding 4-8 parts by mass of a fiber material, 0.05-0.2 part by mass of a retarder material and 20-25 parts by mass of mixing water, mixing and stirring uniformly, then forcibly extruding the mixture by an extruder to form a strip-shaped gypsum plate material, and cutting the gypsum plate material twice.

Thus, the gypsum block is produced by a dry method and is extruded to form, compared with a slurry method, the production process is simpler, and the prepared gypsum board has high density, good strength and higher quality. Meanwhile, the gypsum block is simple in material, does not contain filler powder such as fly ash and fine sand, only adopts a small amount of fiber material to improve the breaking strength, avoids the product from being too brittle, and adopts a small amount of retarder to adjust the gypsum setting time so as to facilitate cutting. The addition of a setting material is not needed in the formula, the main material of the semi-hydrated gypsum is converted into the dihydrate gypsum after being combined with the added mixing water, the setting hydration is completed under high pressure, the amount of the added mixing water is consistent with the amount of crystallization water needed for converting the semi-hydrated gypsum into the dihydrate gypsum, the semi-hydrated gypsum and the mixing water are fully stirred and uniformly mixed and then are forcibly extruded, compacted and formed, and are directly converted into the dihydrate gypsum, and extremely high hardness and strength can be obtained.

As optimization, the length range is 380-600mm, the width range is 180-200mm, and the thickness range is 100-200mm, so that the size meets the requirements of national standards, and the product application is wider.

Preferably, the fiber material comprises 5 parts by mass of pulp fibers and 1 part by mass of glass fibers, wherein the length of the pulp fibers is less than 2mm, and the length of the glass fibers is less than 5 mm.

If the overall proportion of the fibers is too high, the compressive strength of a final product is influenced, and if the proportion is too low, the product has high brittleness and insufficient fracture resistance. In the two fiber materials, the glass fiber has good strength, but the cost is higher, the smoothness of the surface of the product is insufficient, the roughness is high, the smooth extrusion degree of the product can be influenced even, the strength of the paper pulp fiber is relatively lower, but the cost is lower, and the smoothness of the surface of the product cannot be influenced. Therefore, the paper pulp fiber with a large proportion and the glass fiber with a small proportion are combined for use, so that the defects of the paper pulp fiber and the glass fiber are mutually compensated, the advantages are mutually complemented, the cost is reduced, and the final strength performance and the surface smoothness of the product are ensured.

As optimization, the retarder material adopts protein retarder, and the proportion is about 0.1 part by mass.

The protein retarder is specially prepared for gypsum setting adjustment, 0.1 part by mass (0.1%) of the protein retarder is added, the retarding degree of the gypsum can be properly adjusted, the protein retarder is extruded into a plate shape from an extruder, the plate shape cannot have too high hardness when being cut on a subsequent conveying device, the plate shape is beneficial to cutting, and the protein retarder is completely set and hydrated after the cutting is finished so as to improve the product strength.

The gypsum block is obtained by adopting the following preparation method, and comprises the following steps: mixing materials, namely adding a retarder into mixing water for mixing, and then stirring and uniformly mixing the semi-hydrated gypsum powder, the fiber material and the mixing water; b, extrusion molding, namely adding the mixed raw materials into an extruder, and carrying out extrusion molding under the pressure of 2-4 MPa/square centimeter to obtain a continuous gypsum board, wherein the width and thickness of the gypsum board are consistent with the length and thickness of the building block, and the compression ratio of the extruder is 2.5: 1-3.5: 1; c, conveying and cutting, wherein the extruded continuous gypsum boards are conveyed forwards on a conveying roller way, the continuous gypsum boards are transversely cut for the first time in a synchronous follow-up cutting mode to obtain disconnected gypsum boards, and each disconnected gypsum board is cut into a plurality of gypsum blocks meeting the length, width and height size requirements in a static cutting mode; d, stacking and hydrating the gypsum blocks, and obtaining the product after the hydration reaction of the gypsum blocks is finished.

Therefore, the gypsum block product is produced by a dry method, is extruded to form the length and thickness dimensions of the block, and then is transversely cut twice to obtain the width dimension of the block.

And optimally, mixing water after the retarder is added is divided into two parts and added into the raw materials, wherein most part of the mixing water is added and mixed uniformly in a spraying mode in the stirring process of the semi-hydrated gypsum powder and the fiber material, and a small part of the mixing water is input into the position of an outlet inner cavity of an extrusion head of an extruder by a conveying pipeline and is added to the surface of the gypsum board material.

Like this, most proportion's mix water is added with the mixing stirring of hemihydrate gypsum powder with the mode that sprays earlier for the mix water can be mixed more fully and evenly with the hemihydrate gypsum powder, and the partly mix water that lacks simultaneously can effectively restrain the hemihydrate gypsum powder and begin the complete hydration just before the extrusion and produce the condensation. Then a small part of mixing water is added at an outlet after the semi-hydrated gypsum powder is extruded and compacted by an extruder, and the mixing water with the small part proportion can rapidly permeate into the powder under the high pressure of the extruder after being added, so that the proportion of sufficient crystal water is supplemented. The conversion of a part of hemihydrate gypsum to dihydrate gypsum is rapidly completed while the material is extruded, and the converted dihydrate gypsum has larger volume so as to extrude space and further improve the compactness of the plate. Simultaneously this small proportion's mix water can guarantee that extrusion head exit position has sufficient lubricated effect, guarantees extruding smoothly of material and generating the gypsum board. The optimal proportion of the mixing water can be obtained through experimental verification, but the proportion of the mixing water added into the mixing head is larger than that of the mixing water added into the outlet of the subsequent extrusion head.

As optimizing, the b step relies on the double helix extruder to realize, the double helix extruder has the shell that a level set up, be provided with two extrusion pivots in the shell side by side, there is the helical blade that sets up in the extrusion pivot, the shell rear end is provided with the extrusion motor, extrusion motor and two extrusion pivot transmission are connected and are driven two extrusion pivot relative rotations, the shell rear portion still is provided with the material entry, the shell front end has an extrusion section, both ends draw close towards the centre along forward direction about the extrusion section, the extrusion section front end links up the shaping section that has a horizontal straight section of thick bamboo structure and forms and extrudes the head, it is provided with the mix water and adds the structure to extrude the head position, mix water adds the structure and has the delivery port around extruding head inner chamber circumference and setting.

When the double-screw extruder is used, the gypsum powder materials mixed with the fiber materials and part of mixing water enter the inner cavity of the shell from the material inlet, the extrusion motor drives the two extrusion rotating shafts to rotate relatively, the helical blades on the extrusion rotating shafts stir the materials, and the materials are driven to move forwards and provide extrusion force. The materials are further fully stirred while moving forwards, so that part of the mixing water added in the previous process can be further fully mixed with the hemihydrate gypsum. The cross-sectional area of the material entering the extrusion section at the front end of the shell is gradually reduced, and the extrusion force is gradually increased. Then the material is extruded and is entered into and extrude the head, in extrude the head inner chamber material and another part mix water combination that adds, this part mix water permeate the material inside fast under high pressure and combine the dihydrate gypsum that generates closely knit state with the gesso step by step afterwards, then lean on and extrude head straight section inner chamber extrusion shaping panel appearance, the panel structure that generates enters into the rollgang in succession and carries out follow-up cutting process. Therefore, the double-screw extruder can well realize the dry extrusion forming of the gypsum building block. Wherein, the double helix structure can provide the great extrusion force of intensity, has stirring effect at the transported substance in-process by oneself simultaneously, can make the gypsum powder and the part mix water misce bene that adds earlier and produce certain preliminary hydration effect better, combines another part mix water behind the extrusion head position again, hydrates the formation partly dihydrate gypsum fast under the high pressure, has greatly improved the quality of extruding panel.

Furthermore, the inner cavity of the shell is provided with two cylindrical channels which are horizontally arranged in parallel, the middle parts of the two cylindrical channels are communicated, two extrusion rotating shafts are respectively and correspondingly arranged at the axes of the two cylindrical channels, and the outer ends of the spiral blades on the extrusion rotating shafts are arranged close to the inner cavity of the cylindrical channel.

Like this, pivot and helical blade can provide the extrusion force to the material better, guarantee the extrusion section and extrude the extrusion effect of first position.

Furthermore, the rear ends of the two extrusion rotating shafts can rotatably penetrate out of the shell, a pair of transmission gears meshed with each other is fixedly arranged on the part of the two extrusion rotating shafts penetrating out of the shell, and the extrusion motor is installed outside the rear end of the shell and is in transmission connection with any extrusion rotating shaft.

Therefore, two rotating shafts can be driven to synchronously and relatively rotate only by one extrusion motor, and the structure is simple and reliable.

Furthermore, the material inlet is positioned at the rear part of the shell, close to the rear end and is arranged right opposite to the middle position of the two extrusion rotating shafts.

Therefore, when falling into, the material just falls into the middle of the two extrusion rotating shafts, so that the material is favorably conveyed forwards after being dispersed by the two extrusion rotating shafts, and is also favorably and better stirred uniformly by the spiral blades on the two extrusion rotating shafts.

Furthermore, the upper end of the material inlet is provided with a feeding funnel with a large diameter end facing upwards in a butt joint mode. This facilitates better feeding.

Further, feed hopper upper portion is provided with a dome and forms closed structure, and dome one side has the outside extension section that sets up of one section level, and extension section outer end opening still links up and is provided with measurement conveying mechanism in the feed hopper upper end, and measurement conveying mechanism's output enters into inside the dome from the extension section.

The metering and conveying mechanism can realize metering and inputting of materials, further realize continuous production of a production line, and meanwhile, the top cover structure can prevent powder from volatilizing when falling.

Further, the metering conveying mechanism is an automatic metering conveying belt. The metering control device has the advantages of simple structure and capability of better realizing metering control on input materials.

Further, the mixing water adding structure comprises a first water outlet located at the front part of the inner cavity of the extrusion section and a second water outlet located at the inner cavity of the forming section at the front end of the extrusion section, and the first water outlet and the second water outlet are arranged in the circumferential direction.

Like this, the mix water that gets into earlier through first delivery port can have more time to permeate the material inside, mixes and progressively generates crystal water with inside hemihydrate gypsum powder under the high pressure better, and the mix water that the second delivery port got into plays the effect of supplementary crystal water simultaneously, still plays lubricated effect to bearing the shaping section inner chamber surface of maximum pressure position to make the gypsum board can smoothly extrude. Simultaneously the second delivery port can guarantee that the gypsum board has sufficient mix water and the gypsum board surface's hemihydrate gypsum reaction and generate partly dihydrate gypsum in the moment of extruding earlier for its surface layer shell can have sufficient hardness in order to do benefit to the shaping after the gypsum board is extruded, makes things convenient for follow-up cutting and stack. And the gypsum board needs to wait for a period of time until internal mixing water is fully dispersed to each position to complete hydration, so that the semi-hydrated gypsum at each position in the gypsum board is converted into the dihydrate gypsum to obtain a final product. Therefore, the gypsum board can be better formed by arranging the two water outlets, and the product quality is improved.

Furthermore, the taper of the inner cavity of the front half section of the extrusion section is increased, and the first water outlet is positioned at the position where the taper of the inner cavity of the extrusion section is increased.

Like this, will extrude half section inner chamber tapering behind the increase and form pressure concentration position, the powder is carried this back pressure and is increased suddenly for the mix water that enters into the inner chamber from this position can be better inside the powder fully permeates under the pressure effect.

Furthermore, a water interlayer is arranged at the front half section of the extrusion section, a first water outlet is formed at the front end opening of the water interlayer, and a first water inlet joint is connected and arranged outside the water interlayer.

Therefore, the first water outlet can better and conveniently discharge water forwards, and powder is prevented from entering the water outlet pipeline from the water outlet.

Furthermore, a second water inlet connector is connected and arranged outside the forming section, and the second water inlet connector is communicated with a second water outlet. Thus, the water can be conveniently fed into the second water inlet joint.

Furthermore, the outlet directions of the first water outlet and the second water outlet are both obliquely arranged forwards so that water can be discharged forwards. Therefore, the water can be discharged forward better, and the powder is prevented from entering the water outlet.

Furthermore, two side walls of the outlets of the first water outlet and the second water outlet are splayed from back to front. Therefore, the water outlet area can be better enlarged, and the mixing water and the materials can be fully combined.

Furthermore, the water outlet proportion of the first water outlet is larger than that of the second water outlet. More mixing water is earlier gone out water and is contacted with the powder in order better infiltration powder inside from first delivery port like this, and a small amount of water of second delivery port can keep forming section inner chamber surface lubrication in order to make things convenient for panel to extrude, makes the sufficient enough hardness that can form of panel surface layer water content simultaneously can.

Furthermore, a core mold structure is arranged in the extrusion port, the core mold structure comprises an inner core which is horizontally arranged in the inner cavity of the extrusion port, the rear end of the inner core is fixed on a vertically arranged retainer, and the periphery of the retainer is fixedly arranged on the inner cavity of the extrusion section of the shell.

The inner core is used for forming the inner cavity of the gypsum board, so that the gypsum board forms a hollow structure and can better generate heat insulation effect as a building material.

Furthermore, the rear part of the inner core is positioned in the extrusion section and is in a frustum shape with the diameter of the end surface increasing forwards, and the front part of the inner core is positioned in the forming section and is in a straight cylinder shape.

Like this, the frustum shape at inner core rear portion can with the cooperation of extrusion section, increase the forward trend of narrowing of extrusion section inner chamber space cross-section, further make the increase of this regional pressure concentration, do benefit to here more that the mix water that gets into permeates the material inside at high pressure fast to can combine to generate the dihydrate gypsum with the hemihydrate gypsum better, improve the closely knit degree of panel and the even degree of quality better.

The step c is realized by a conveying system, the conveying system comprises a conveying rack, a plurality of conveying rollers are arranged on the upper surface of the conveying rack at intervals and form a conveying roller way, the starting end of the conveying roller way is connected with the outlet of an extruder, and a synchronous follow-up cutting device and a static cutting device are sequentially arranged on the conveying rack along the advancing direction; the synchronous follow-up cutting device comprises a follow-up portal frame transversely erected above the conveying rack, a longitudinal translation mechanism is arranged between the follow-up portal frame and the conveying rack, the longitudinal translation mechanism can drive the follow-up portal frame to horizontally move along the front and back directions of the conveying rack, and a follow-up cutting device is further arranged on the follow-up portal frame and used for transversely cutting off continuous gypsum boards; the static cutting device comprises a static portal frame transversely erected above the conveying rack, the static cutting devices are arranged on the static portal frame in parallel along the conveying direction, each static cutting device is provided with a plurality of static disc cutters for cutting off, the disc cutters for cutting off are arranged along the width direction of the conveying rack, the disc cutters for cutting off statically are uniformly distributed at intervals along the length direction of the conveying rack, the spacing distance between every two adjacent disc cutters for cutting off statically is consistent with the width dimension of gypsum blocks, and the static cutting devices are used for finishing secondary transverse cutting of gypsum boards; and a section of active speed-increasing conveying roller way is connected on the conveying roller way between the static cutting device and the synchronous follow-up cutting device, and the conveying roller on the active speed-increasing conveying roller way is connected with a speed-increasing motor and is used for increasing the advancing speed of the passing gypsum board.

Therefore, the follow-up portal frame can complete the follow-up motion with the conveying roller way by virtue of the longitudinal translation mechanism, the follow-up cutting device is relied to realize the first transverse cutting of continuous gypsum boards in the follow-up process, the cut gypsum boards enter the active speed-up conveying roller way and then are accelerated, a distance is pulled between the adjacent gypsum boards, then the gypsum boards are sequentially conveyed to the lower part of the static portal frame by the active speed-up conveying roller way, and the static cutting device is relied to complete the secondary transverse cutting in a forbidden state, so that the gypsum block meeting the requirements of length, width and height is obtained. And then the gypsum block is pushed out of the lower part of the static portal frame by the next gypsum board, and enters a subsequent production line flow, and finally, the stacking hydration is finished. Therefore, the whole production line can realize flow line production, and the production efficiency is greatly improved.

Further, a mounting seat for follow-up cutting is arranged on a cross beam at the top of the follow-up gantry, a mounting arm for follow-up cutting extending downwards is arranged on the mounting seat for follow-up cutting, a rotatable disc cutter for follow-up cutting is vertically arranged at the lower end of the mounting arm for follow-up cutting, a space for accommodating the mounting seat for follow-up cutting and the disc cutter for follow-up cutting is reserved between the end part of at least one end of the cross beam and the conveying roller way, a motor for follow-up cutting is further arranged on the mounting seat for follow-up cutting, the motor for follow-up cutting is in transmission connection with the disc cutter for follow-up cutting, a transverse translation mechanism for the mounting seat for follow-up cutting for driving the mounting seat for follow-up cutting to transversely translate is arranged between the mounting seat for follow-up cutting and the cross beam, the height size from the rotating shaft of the disc cutter for follow-up cutting to the lower edge is larger than the thickness of the gypsum board, and the mounting seat for follow-up cutting can drive the disc cutter for follow-up cutting to transversely translate to complete the cutting of conveying the gypsum board And (6) cutting.

Therefore, when the device works, the servo cutting motor is used for driving the servo cutting disc cutter to rotate, and the servo cutting mounting seat transverse translation mechanism is used for controlling the servo cutting mounting seat to transversely translate, so that the continuous gypsum board on the conveying roller way can be cut. Has the characteristics of simple structure and stable and reliable cutting.

Furthermore, spaces for accommodating the mounting seats for follow-up cutting and the disc cutters for follow-up cutting are reserved between the end parts of the two ends of the cross beam of the follow-up portal frame and the conveying roller way.

Therefore, during cutting, the mounting seat for follow-up cutting moves along one direction, the mounting seat can completely cut off the gypsum board until the disc cutter for follow-up cutting passes through the gypsum board, and then the mounting seat for follow-up cutting moves back after the follow-up portal frame is reset backwards, so that the gypsum board can be cut off for the second time. Therefore, the mounting seat for follow-up cutting can realize two cutting actions by one reciprocating motion, so that the work is more efficient.

Furthermore, the mounting arm for follow-up cutting is arranged below one end, in the transverse direction of the conveying roller way, of the mounting seat for follow-up cutting, the motor for follow-up cutting is arranged above the other end of the mounting seat for follow-up cutting, and the output shaft of the motor for follow-up cutting is connected with the disc cutter for follow-up cutting through a belt mechanism to realize transmission.

Therefore, the transmission mechanism has the characteristics of simple structure and stable and reliable transmission.

Furthermore, the follow-up cutting is with installing arm has two, and two follow-up cutting is with installing arm along rollgang fore-and-aft direction interval set up side by side, rotationally sets up follow-up cutting with cutter pivot between two follow-up cutting with installing arms, follow-up cutting is with disc cutter installation on follow-up cutting with cutter pivot, and the output of belt mechanism is connected on follow-up cutting with cutter pivot.

Like this, can guarantee the stable load of follow-up for the cutting disc cutter when the cutting better, guarantee the stability and the reliability of cutting process.

Furthermore, the transverse translation mechanism of the mounting seat for the follow-up cutting comprises two synchronous belt wheels for the follow-up cutting, which are arranged at the upper ends of vertical arms on two sides of the follow-up portal frame, any one of the synchronous belt wheels for the follow-up cutting is in transmission connection with a transverse translation motor for the follow-up cutting, which is arranged on the follow-up portal frame, a synchronous belt is sleeved on the two synchronous belt wheels for the follow-up cutting, and the synchronous belt and the mounting seat for the follow-up cutting are fixed and drive the mounting seat for the follow-up cutting to transversely translate on a beam at the top of the follow-up portal frame.

Furthermore, a transverse guide rail for follow-up cutting is arranged on a beam at the top of the follow-up gantry, and the lower end of the mounting seat for follow-up cutting is provided with a part which is in slidable clamping fit with the transverse guide rail for follow-up cutting. Therefore, the stability of the mounting seat for follow-up cutting during transverse translation can be better ensured.

Furthermore, the longitudinal translation mechanism comprises a rack horizontally fixed on the conveyor frame, the length of the rack is equal to or greater than that of the gypsum board, the longitudinal translation mechanism also comprises a longitudinal translation motor arranged on the follow-up portal frame, an output shaft of the longitudinal translation motor is in transmission connection with a longitudinal translation gear, and the longitudinal translation gear is meshed with the rack; the longitudinal translation mechanism also comprises rollers arranged at the lower ends of the side arms of the follow-up portal frame, and the rollers are supported and matched on a longitudinal guide rail longitudinally fixed on the conveying rack.

Therefore, the support and the longitudinal translation guide of the follow-up portal frame are completed by the matching of the rollers and the longitudinal guide rail. Meanwhile, the longitudinal translation gear is controlled to rotate on the rack by the longitudinal translation motor, the follow-up portal frame can be driven to longitudinally move along the conveying roller way, the accurate control of synchronous motion with the production line is well realized, and the follow-up cutting device can stably cut off the gypsum board in a relatively static state conveniently. The servo-actuated servo.

Furthermore, the longitudinal translation mechanism also comprises a telescopic cylinder for resetting, the telescopic cylinder for resetting is longitudinally arranged along the conveying roller way, one end of the telescopic cylinder for resetting is connected to the conveying rack, the other end of the telescopic cylinder for resetting is connected with the follow-up portal frame, a one-way transmission mechanism is arranged between an output shaft of the longitudinal translation motor and the longitudinal translation gear, and the one-way transmission mechanism is used for controlling the follow-up portal frame to realize one-way transmission forward along the conveying roller way.

Like this, after the cutting finishes, can rely on the telescoping cylinder for reseing to reset fast, improve work efficiency. During implementation, the cylinder is preferably adopted as the telescopic cylinder for resetting, the resetting is quicker and the cost is low.

Furthermore, the longitudinal translation mechanisms are provided with two sets and are respectively and symmetrically arranged on two sides of the follow-up portal frame.

Therefore, the longitudinal translation process of the follow-up portal frame can be more stable and reliable.

Furthermore, a section of follow-up roller way is connected and arranged in the conveying roller way above the longitudinal translation mechanism, the follow-up roller way comprises a roller seat sliding groove which is longitudinally arranged on the conveying rack, the length of the roller seat sliding groove is greater than that of the gypsum board, a plurality of sliding roller seats are longitudinally slidably arranged in the roller seat sliding groove, sliding rollers are arranged on the sliding roller seats, the sliding rollers and the rollers fixedly arranged on the conveying roller way are positioned at the same horizontal height, folding connecting rods are vertically and rotatably hinged on the sliding roller seats, and the end parts of the folding connecting rods of the adjacent sliding roller seats are hinged and connected to form a telescopic connecting rod combination which longitudinally extends; the follow-up portal frame is positioned in the middle of the follow-up roller way, the front end and the rear end of the follow-up portal frame are respectively provided with one section of telescopic connecting rod combination, one end of the telescopic connecting rod combination in the length direction is hinged on the follow-up portal frame, and the other end of the telescopic connecting rod combination is hinged on a carrier roller seat which is fixedly arranged adjacent to the follow-up roller way.

Therefore, in the process that the follow-up portal frame moves forwards in a translation mode along with the conveying roller way, the telescopic connecting rod combination is used for driving the sliding roller bases in front and back of the follow-up portal frame to move in a follow-up mode, the sliding roller bases in front of the follow-up portal frame gradually draw close, the distance between the sliding roller bases in back gradually stretches, and stable supporting of the gypsum board above can be achieved. And more importantly, the structure can ensure that the carrier rollers of the follow-up gantry in and below the advancing process can not keep a relative motion state any more and can be converted into a relative static state. When the follow-up cutting device on the follow-up portal frame works, the follow-up cutting disc cutter can avoid the interference problem with the carrier roller, the follow-up cutting disc cutter can cut the distance exceeding the lower surface of the gypsum board downwards, the gypsum board can be cut off more efficiently and reliably, and the cutting quality of the gypsum board is improved.

Furthermore, each sliding roller seat is hinged with two folding connecting rods in a vertically rotatable manner, and the two folding connecting rods are arranged in an X shape in a crossed manner.

The telescopic motion process of the telescopic connecting rod combination formed in the way is more stable and reliable.

Furthermore, the follow-up roller way also comprises two follow-up carrier rollers which are arranged inside the follow-up portal frame at intervals in the front and back direction, the follow-up carrier rollers are arranged on the follow-up roller seat, the follow-up roller seat is slidably arranged in the roller seat sliding groove and is fixedly connected with the follow-up portal frame, and the follow-up cutting disc cutter of the follow-up cutting device is arranged right opposite to the middle part of the interval position between the two follow-up carrier rollers.

Like this, two follow-up roller seats follow-up portal frame back-and-forth movement for during the cutting of follow-up for the disc cutter for the cutting, can realize the front and back both ends stable stay of cutting position gypsum board, guarantee the stability of cutting better.

Preferably, a static cutting mounting seat is arranged on a cross beam at the top of the static portal frame, two static cutting mounting arms extending downwards are arranged on the static cutting mounting seat at intervals along the length direction of the conveying rack, a static cutting cutter rotating shaft is rotatably arranged between the lower ends of the two static cutting mounting arms, a plurality of static cutting disc cutters are mounted on the static cutting cutter rotating shaft, a space for accommodating the static cutting mounting seat and the static cutting disc cutters is reserved between at least one end part of the cross beam at the top of the static portal frame and the conveying roller way, a static cutting motor is further arranged on the static cutting mounting seat, the static cutting motor is in transmission connection with the static cutting disc cutters, a static cutting mounting seat transverse translation mechanism for driving the static cutting mounting seat to transversely translate is further arranged at the top of the static portal frame, the static cutting-off mounting seat can horizontally translate to drive the static cutting-off disc cutter to complete the cutting of the gypsum board on the conveying roller way.

Like this, can rely on static cutting device once only to be polylith gypsum block with the gypsum board cutting, have simple structure, cut reliable and stable characteristics.

As optimization, a downward-arranged telescopic device for limiting is further installed at one end of the static portal frame, which is located at the outlet, and a telescopic rod of the telescopic device for limiting can enter a forward path of the batten (building block) to limit after extending downwards.

Therefore, the lath can be accurately limited by the aid of the limiting telescopic device after entering the lower part of the static portal frame, and static cutting precision control is guaranteed. After cutting off, the telescopic rod of the telescopic device for limiting is retracted upwards, so that the cut building blocks can continue to enter the front of the production line. And the discontinuous flow line production is realized.

In conclusion, the invention can be used for dry production and preparation of gypsum blocks, can realize production line automatic production, and has the advantages of simple preparation materials, simple process, high product strength, good quality, good process feasibility and the like.

Drawings

Fig. 1 is a schematic diagram of a gypsum block production system used in an embodiment of the present invention.

FIG. 2 is a schematic view of the structure of a portion of the single twin screw extruder of FIG. 1.

FIG. 3 is a schematic view showing the structure of the extrusion head part at the front end of the twin-screw extruder of FIG. 2.

Fig. 4 is a schematic structural diagram of a part of the single synchronous follow-up cutting device in fig. 1.

Fig. 5 is a side view of fig. 4.

Fig. 6 is a schematic view of the structure of the single static cutting device part in fig. 1.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

In the specific implementation: the gypsum block is prepared by adopting a dry method, the whole appearance of the gypsum block is rectangular, the length range of the gypsum block is 800mm, the width range of the gypsum block is 100 mm and 250mm, and the thickness range of the gypsum block is 80-250mm, wherein the gypsum block is prepared by adopting 68-76 parts by mass of semi-hydrated gypsum powder as a main material, adding 4-8 parts by mass of fiber material, 0.05-0.2 part by mass of retarder material and 20-25 parts by mass of mixing water, mixing, uniformly stirring, then adopting a forced extruder to extrude and form a strip-shaped gypsum plate material, and cutting twice.

During implementation, the length range of the gypsum block is 380-600mm, the width range is 180-200mm, and the thickness range is 100-200 mm. The size meets the national standard requirements, and the product is more widely applied.

In practice, the fiber material comprises 5 parts by mass of pulp fiber and 1 part by mass of glass fiber, wherein the length of the pulp fiber is less than 2mm, and the length of the glass fiber is less than 5 mm.

When the retarder is implemented, the retarder material is protein retarder, and the proportion is about 0.1 part by mass.

When in implementation, the gypsum block is obtained by adopting the following preparation method, and comprises the following steps: mixing materials, namely adding a retarder into mixing water for mixing, and then stirring and uniformly mixing the semi-hydrated gypsum powder, the fiber material and the mixing water; b, extrusion molding, namely adding the mixed raw materials into an extruder, and carrying out extrusion molding under the pressure of 2-4 MPa/square centimeter to obtain a continuous gypsum board, wherein the width and thickness of the gypsum board are consistent with the length and thickness of the building block, and the compression ratio of the extruder is 2.5: 1-3.5: 1; c, conveying and cutting, wherein the extruded continuous gypsum boards are conveyed forwards on a conveying roller way, the continuous gypsum boards are transversely cut for the first time in a synchronous follow-up cutting mode to obtain disconnected gypsum boards, and each disconnected gypsum board is cut into a plurality of gypsum blocks meeting the length, width and height size requirements in a static cutting mode; d, stacking and hydrating the gypsum blocks, and obtaining the product after the hydration reaction of the gypsum blocks is finished.

The mixing water after the retarder is added is divided into two parts and added into the raw materials, wherein most part of the mixing water is added and uniformly mixed in a spraying mode in the stirring process of the semi-hydrated gypsum powder and the fiber material, and a small part of the mixing water is input into the position of an outlet inner cavity of an extrusion head of an extruder through a conveying pipeline and is added to the surface of the gypsum board material.

In practice, the above-described manufacturing method may be implemented by means of a gypsum block production system, as shown in fig. 1 to 6, which includes a twin screw extruder for extrusion molding of gypsum board, and a conveying system is provided in the outlet of the twin screw extruder in a connected manner.

Wherein, step b relies on the double helix extruder to realize, see fig. 2-3, the double helix extruder has the shell 1 of a level setting, be provided with two extrusion pivot 2 in the shell 1 side by side, there is set up helical blade 3 on the extrusion pivot 2, the shell rear end is provided with extrusion motor 4, extrusion motor 4 and two extrusion pivot 2 transmission connection and drive two extrusion pivot relative rotations, shell 1 rear portion still is provided with material inlet 5, the shell front end has an extrusion section 6, both ends draw close towards the centre along forward direction about the extrusion section 6, extrusion section 6 front end links up the shaping section 7 of a horizontal straight tube structure and forms and extrudes the head, it adds the structure to extrude the head position, mix water and add the structure and have around extruding the delivery port that first inner chamber circumference set up.

In the double-screw extruder, the inner cavity of the shell 1 is provided with two cylindrical channels which are horizontally arranged in parallel, the middle parts of the two cylindrical channels are communicated, two extrusion rotating shafts 2 are respectively and correspondingly arranged at the axes of the two cylindrical channels, and the outer ends of the helical blades on the extrusion rotating shafts are arranged close to the inner cavities of the cylindrical channels.

In the double-screw extruder, the rear ends of two extrusion rotating shafts 2 can rotatably penetrate out of the shell, a pair of transmission gears 8 which are meshed with each other are fixedly arranged on the parts of the two extrusion rotating shafts penetrating out of the shell, and the extrusion motor 4 is arranged outside the rear end of the shell and is in transmission connection with any extrusion rotating shaft.

In the double-screw extruder, a material inlet 5 is positioned at the rear part of a shell 1 and close to the rear end, and is arranged right opposite to the middle of two extrusion rotating shafts 2.

Wherein, the upper end of the material inlet 5 is provided with a feeding funnel 9 with a large diameter end facing upwards in a butt joint way. This facilitates better feeding.

In the double-screw extruder, 9 upper portions of the feeding funnels are provided with a top cover 10 to form a closed structure, one side of the top cover is provided with an extension section which horizontally extends outwards, the outer end of the extension section is provided with an opening, the upper ends of the feeding funnels are further connected with a metering conveying mechanism 11, and the output end of the metering conveying mechanism 11 enters the inside of the top cover from the extension section.

Wherein, the measuring and conveying mechanism 11 is an automatic measuring and conveying belt. The metering control device has the advantages of simple structure and capability of better realizing metering control on input materials.

The mixing water adding structure comprises a first water outlet 12 located at the front part of an inner cavity of the extrusion section and a second water outlet 13 located at the front end of the inner cavity of the forming section, and the first water outlet and the second water outlet are arranged in the circumferential direction.

Wherein, the taper of the inner cavity of the front half section of the extrusion section 6 is increased, and the first water outlet 12 is positioned at the position where the taper of the inner cavity of the extrusion section is increased.

Wherein, the first half section of extrusion section is provided with the water interlayer, and water interlayer front end opening forms first delivery port 12, and the water interlayer external connection is provided with first water supply connector 14.

Wherein, the exterior of the forming section 7 is connected with a second water inlet joint 15, and the second water inlet joint 15 is communicated with the second water outlet 13. Thus, the water can be conveniently fed into the second water inlet joint.

Wherein, the outlet directions of the first water outlet and the second water outlet are both obliquely arranged forwards so that the water is discharged forwards (not shown in the figure). Therefore, the water can be discharged forward better, and the powder is prevented from entering the water outlet.

Wherein, two side walls of the outlet of the first water outlet and the outlet of the second water outlet are in a splayed shape (not shown in the figure) which is enlarged from back to front. Therefore, the water outlet area can be better enlarged, and the mixing water and the materials can be fully combined.

In implementation, the water outlet ratio of the first water outlet 12 is greater than that of the second water outlet 13. More mixing water is earlier gone out water and is contacted with the powder in order better infiltration powder inside from first delivery port like this, and a small amount of water of second delivery port can keep forming section inner chamber surface lubrication in order to make things convenient for panel to extrude, makes the sufficient enough hardness that can form of panel surface layer water content simultaneously can.

In the double-screw extruder, a core mold structure is also arranged in the extrusion port, the core mold structure comprises an inner core 16 which is horizontally arranged in the inner cavity of the extrusion port, the rear end of the inner core 16 is fixed on a retainer 17 which is vertically arranged, and the periphery of the retainer 17 is fixedly arranged on the inner cavity of the extrusion section 6 of the shell.

Wherein, the rear part of the inner core 16 is positioned in the extrusion section and is in a frustum shape with the diameter of the end surface increasing forwards, and the front part of the inner core 16 is positioned in the forming section and is in a straight cylinder shape.

During implementation, the step c is realized by a conveying system, the conveying system comprises a conveying rack 18, a plurality of conveying rollers 19 are arranged on the upper surface of the conveying rack 18 at intervals and form a conveying roller way, the starting end of the conveying roller way is connected with the outlet of the extruder, and a synchronous follow-up cutting device and a static cutting device are sequentially arranged on the conveying rack along the advancing direction, which is shown in fig. 4-5; the synchronous follow-up cutting device comprises a follow-up portal frame 20 transversely erected above the conveying rack, a longitudinal translation mechanism is arranged between the follow-up portal frame 20 and the conveying rack and can drive the follow-up portal frame 20 to horizontally move along the front and back directions of the conveying rack, and a follow-up cutting device is further arranged on the follow-up portal frame 20 and used for transversely cutting off the continuous gypsum boards 21. Referring to fig. 6, the static cutting device includes a static portal frame 20 ' transversely arranged above the conveyor frame, the static cutting device is arranged on the static portal frame in parallel along the conveying direction, the static cutting device has a plurality of static cutting disc cutters 24 ' arranged along the width direction of the conveyor frame, the static cutting disc cutters are uniformly arranged along the length direction of the conveyor frame at intervals, the interval distance between two adjacent static cutting disc cutters 24 ' is consistent with the width dimension of gypsum blocks, and the static cutting device is used for finishing secondary transverse cutting of gypsum blocks; and a section of active speed-up rollgang 40 is connected to the rollgang between the static cutting device and the synchronous follow-up cutting device, and the conveying rollers on the active speed-up rollgang 40 are connected with a speed-up motor and used for increasing the advancing speed of passing gypsum boards.

Wherein, be provided with on the crossbeam at follow-up portal frame 20 top and follow-up for the cutting mount pad 22, follow-up for the cutting mount pad 22 have a follow-up cutting installation arm 23 that extends downwards, follow-up for the cutting installation arm 23 lower extreme is vertical installs a rotatable follow-up for the cutting disc cutter 24, leave the space that supplies to hold mount pad for the follow-up for the cutting and follow-up for the cutting disc cutter 24 between at least one end tip of crossbeam and the rollgang, still be provided with on the follow-up for the cutting mount pad and follow-up for the cutting motor 25, follow-up for the cutting motor 25 and follow-up for the cutting disc cutter 24 transmission connection, be provided with between follow-up for the cutting mount pad 22 and the crossbeam and be used for driving follow-up for the cutting mount pad horizontal translation mechanism, follow-up for the cutting disc cutter 24 pivot to lower part edge height dimension is greater than gypsum board 21 thickness and makes follow-up for the cutting mount pad horizontal translation can drive follow-up for the cutting disc cutter completion cutter And (5) cutting the gypsum board on the conveying roller way.

Wherein, all leave the space that supplies to hold mount pad for the follow-up cutting and follow-up cutting disc cutter between the both ends tip of follow-up portal frame crossbeam and the rollgang.

Wherein, the mounting arm 23 for follow-up cutting is arranged below one end of the mounting seat for follow-up cutting along the transverse direction of the conveying roller way, the motor for follow-up cutting is arranged above the other end of the mounting seat for follow-up cutting, and the output shaft of the motor 25 for follow-up cutting is connected with the disc cutter 14 for follow-up cutting through a belt mechanism to realize transmission.

The two mounting arms 23 for follow-up cutting are arranged in parallel at intervals in the front-back direction of the conveying roller way, a cutter rotating shaft for follow-up cutting is rotatably arranged between the two mounting arms 23 for follow-up cutting, the disc cutter 24 for follow-up cutting is mounted on the cutter rotating shaft for follow-up cutting, and the output end of the belt mechanism is connected to the cutter rotating shaft for follow-up cutting.

The transverse translation mechanism of the mounting seat for the follow-up cutting comprises two follow-up cutting synchronous belt wheels 26 arranged at the upper ends of vertical arms on two sides of a follow-up portal frame, any one of the follow-up cutting synchronous belt wheels 26 is in transmission connection with a transverse translation motor 27 for the follow-up cutting installed on the follow-up portal frame, a synchronous belt is installed on the two follow-up cutting synchronous belt wheels 26 in a sleeved mode, and the synchronous belt and the mounting seat for the follow-up cutting are fixed and drive the mounting seat for the follow-up cutting to transversely translate on a beam at the top of the follow-up portal frame.

Wherein, a transverse guide rail 28 for follow-up cutting is arranged on the top cross beam of the follow-up gantry, and the lower end of the mounting seat 22 for follow-up cutting is provided with a part which can be in sliding clamping fit with the transverse guide rail 28 for follow-up cutting. Therefore, the stability of the mounting seat for follow-up cutting during transverse translation can be better ensured.

The longitudinal translation mechanism comprises a rack 29 horizontally fixed on the conveyor rack 18, the length of the rack 29 is equal to or greater than that of a gypsum board, the longitudinal translation mechanism further comprises a longitudinal translation motor 30 mounted on the follow-up portal frame, an output shaft of the longitudinal translation motor 30 is in transmission connection with a longitudinal translation gear 31, and the longitudinal translation gear 31 is meshed with the rack 29; the longitudinal translation mechanism further comprises a roller 32 arranged at the lower end of a side arm of the follow-up portal frame, and the roller 32 is supported and matched on a longitudinal guide rail 33 longitudinally fixed on the conveyor frame.

The longitudinal translation mechanism further comprises a telescopic cylinder 34 for resetting, the telescopic cylinder 34 for resetting is longitudinally arranged along the conveying roller way, one end of the telescopic cylinder 34 for resetting is connected to the conveying rack 18, the other end of the telescopic cylinder is connected with the follow-up portal frame 20, a one-way transmission mechanism is arranged between an output shaft of the longitudinal translation motor and the longitudinal translation gear, and the one-way transmission mechanism is used for controlling the follow-up portal frame to realize one-way transmission forward along the conveying roller way.

Wherein, the longitudinal translation mechanism has two sets and is respectively and symmetrically installed at both sides of the follow-up portal frame 20.

The device comprises a longitudinal translation mechanism, a roller bed, a plurality of sliding roller seats, a plurality of telescopic connecting rods 36, a plurality of roller seat sliding chutes, a plurality of sliding roller seats 35, a plurality of telescopic connecting rod combinations and a plurality of telescopic connecting rod combinations, wherein a section of follow-up roller bed is arranged in the roller bed above the longitudinal translation mechanism in a linking manner, the follow-up roller bed comprises roller seat sliding chutes which are longitudinally arranged on a conveyor frame, the length of each roller seat sliding chute is greater than that of a gypsum board, the plurality of sliding roller seats 35 are longitudinally slidably arranged in the roller seat sliding chutes, the sliding roller seats 35 are provided with sliding rollers, the sliding rollers and the rollers which are fixedly arranged on the roller bed are positioned at the same horizontal height, the sliding roller seats 35 are vertically and rotatably hinged with the foldable connecting rods 36, and the end parts of the foldable connecting rods 36 of the adjacent sliding roller seats are hinged and connected to form the telescopic connecting rod combinations which extend longitudinally; the follow-up portal frame 20 is located in the middle of the follow-up roller way, the front end and the rear end of the follow-up portal frame are respectively provided with one section of telescopic connecting rod combination, one end of the telescopic connecting rod combination in the length direction is hinged on the follow-up portal frame, and the other end of the telescopic connecting rod combination is hinged on a carrier roller seat which is adjacent to the follow-up roller way and is fixedly arranged.

Wherein, each sliding roller seat 35 is hinged with two folding connecting rods 36 in a vertically rotatable manner, and the two folding connecting rods are arranged in an X shape in a crossed manner.

The follow-up roller way further comprises two follow-up carrier rollers 37 which are arranged inside the follow-up portal frame at intervals in the front-back direction, the follow-up carrier rollers 37 are installed on the follow-up roller seat, the follow-up roller seat is installed in the roller seat sliding groove in a sliding mode and is fixedly connected with the follow-up portal frame, and the follow-up cutting disc cutter 24 of the follow-up cutting device is arranged right opposite to the middle of the interval position between the two follow-up carrier rollers 37.

In the implementation, a static cutting mounting seat 22 ' is arranged on a cross beam at the top of the static portal frame 20 ', two static cutting mounting arms 23 ' extending downwards are arranged on the static cutting mounting seat 22 ' at intervals along the length direction of the conveying rack, a static cutting cutter rotating shaft is rotatably arranged between the lower ends of the two static cutting mounting arms, a plurality of static cutting disc cutters 24 ' are arranged on the static cutting cutter rotating shaft, a space for accommodating the static cutting mounting seat and the static cutting disc cutters is reserved between at least one end part of the cross beam at the top of the static portal frame and the conveying roller way, a static cutting motor 25 ' is further arranged on the static cutting mounting seat, the static cutting motor 25 ' is in transmission connection with the static cutting disc cutters, and a static cutting mounting seat transverse translation mechanism for driving the static cutting mounting seat to transversely translate is further arranged at the top of the static portal frame, the static cutting-off mounting seat can horizontally translate to drive the static cutting-off disc cutter to complete the cutting of the gypsum board on the conveying roller way.

The static portal frame is further provided with a downward limiting expansion device 41 at one end of the outlet, and an expansion rod of the limiting expansion device extends downwards and then can enter a forward path of the batten (building block) to form limiting. When in implementation, the telescopic device for limiting can be obtained by adopting an air cylinder or an electric push rod.

When the synchronous follow-up cutting device is implemented, the structures of the rest static cutting devices on the static portal frame can be the same as or similar to the structure of the synchronous follow-up cutting device on the follow-up portal frame. And thus will not be repeated herein. The cut gypsum block can be shaped again on the production line to obtain accurate size, and the specific process is irrelevant to the invention of the application, so that the detailed description is not provided. The resulting gypsum blocks can be stacked manually or mechanically, and will not be described in detail. And (4) stacking and standing the gypsum blocks for a period of time until the hydration reaction is finished to obtain the block product.

Claims

1. A gypsum block prepared by a dry method is characterized in that the gypsum block is prepared by taking 68-76 parts by mass of semi-hydrated gypsum powder as a main material, adding 4-8 parts by mass of a fiber material, 0.05-0.2 part by mass of a retarder material and 20-25 parts by mass of mixing water, mixing and stirring uniformly, then forcibly extruding the mixture by an extruder to form a strip-shaped gypsum plate material, and cutting the gypsum plate material twice; wherein the pressure of the forced extrusion by the extruder is 2-4 MPa/square centimeter, and the compression ratio is 2.5: 1-3.5: 1;

the gypsum block is obtained by adopting the following preparation method, and comprises the following steps: mixing materials, namely adding a retarder into mixing water for mixing, and then stirring and uniformly mixing the semi-hydrated gypsum powder, the fiber material and the mixing water; b, extrusion molding, namely adding the mixed raw materials into an extruder, and carrying out extrusion molding under the pressure of 2-4 MPa/square centimeter to obtain a continuous gypsum board, wherein the width and thickness of the gypsum board are consistent with the length and thickness of the building block, and the compression ratio of the extruder is 2.5: 1-3.5: 1; c, conveying and cutting, wherein the extruded continuous gypsum boards are conveyed forwards on a conveying roller way, the continuous gypsum boards are transversely cut for the first time in a synchronous follow-up cutting mode to obtain disconnected gypsum boards, and each disconnected gypsum board is cut into a plurality of gypsum blocks meeting the length, width and height size requirements in a static cutting mode; d, stacking and hydrating, namely stacking the gypsum blocks and obtaining a product after the hydration reaction of the gypsum blocks is finished;

the step c is realized by a conveying system, the conveying system comprises a conveying rack, a plurality of conveying rollers are arranged on the upper surface of the conveying rack at intervals and form a conveying roller way, the starting end of the conveying roller way is connected with the outlet of the extruder, and a synchronous follow-up cutting device and a static cutting device are sequentially arranged on the conveying rack along the advancing direction; the synchronous follow-up cutting device comprises a follow-up portal frame transversely erected above the conveying rack, a longitudinal translation mechanism is arranged between the follow-up portal frame and the conveying rack, the longitudinal translation mechanism can drive the follow-up portal frame to horizontally move along the front and back directions of the conveying rack, and a follow-up cutting device is further arranged on the follow-up portal frame and used for transversely cutting off continuous gypsum boards; the static cutting device comprises a static portal frame transversely erected above the conveying rack, the static cutting devices are arranged on the static portal frame in parallel along the conveying direction, each static cutting device is provided with a plurality of static disc cutters for cutting off, the disc cutters for cutting off are arranged along the width direction of the conveying rack, the disc cutters for cutting off statically are uniformly distributed at intervals along the length direction of the conveying rack, the spacing distance between every two adjacent disc cutters for cutting off statically is consistent with the width dimension of gypsum blocks, and the static cutting devices are used for finishing secondary transverse cutting of gypsum boards; a section of active speed-increasing conveying roller way is connected to the conveying roller way between the static cutting device and the synchronous follow-up cutting device, and the conveying roller on the active speed-increasing conveying roller way is connected with a speed-increasing motor and is used for increasing the advancing speed of passing gypsum boards;

a mounting seat for follow-up cutting is arranged on a cross beam at the top of the follow-up gantry, a mounting arm for follow-up cutting extending downwards is arranged on the mounting seat for follow-up cutting, a rotatable disc cutter for follow-up cutting is vertically arranged at the lower end of the mounting arm for follow-up cutting, a space for accommodating the mounting seat for follow-up cutting and the disc cutter for follow-up cutting is reserved between at least one end part of the cross beam and the conveying roller way, a motor for follow-up cutting is also arranged on the mounting seat for follow-up cutting, the motor for follow-up cutting is in transmission connection with the disc cutter for follow-up cutting, a transverse translation mechanism for the mounting seat for follow-up cutting for driving the mounting seat for follow-up cutting to transversely translate is arranged between the mounting seat for follow-up cutting and the cross beam, the height dimension from the rotating shaft of the disc cutter for follow-up cutting to the edge of the lower part is larger than the thickness of the gypsum board, and the disc cutter for follow-up cutting can be driven by the mounting seat for follow-up cutting to transversely translate to complete the cutting of the gypsum board on the conveying roller way.

2. The dry-process produced gypsum block of claim 1, wherein: the length range of the gypsum block is 380-600mm, the width range is 180-200mm, and the thickness range is 100-200 mm.

3. The dry-process produced gypsum block of claim 1, wherein: the fiber material comprises 5 parts by mass of pulp fibers and 1 part by mass of glass fibers, wherein the length of the pulp fibers is less than 2mm, and the length of the glass fibers is less than 5 mm.

4. The dry-process produced gypsum block of claim 1, wherein: the retarder material adopts protein retarder, and the proportion is 0.1 part by mass.

5. The dry-process produced gypsum block of claim 1, wherein: the mixing water after the retarder is added into the raw materials in two parts, wherein most part of mixing water is added and mixed uniformly in a spraying mode in the stirring process of the semi-hydrated gypsum powder and the fiber material, and a small part of mixing water is input into the position of an outlet inner cavity of an extrusion head of an extruder through a conveying pipeline and is added to the surface of the gypsum board material.

6. The dry-process produced gypsum block of claim 1, wherein: the b step relies on the double helix extruder to realize, the double helix extruder has the shell that a level set up, be provided with two extrusion pivots in the shell side by side, there is the helical blade that sets up in the extrusion pivot, the shell rear end is provided with the extrusion motor, the extrusion motor is connected and is driven two extrusion pivot relative rotations with two extrusion pivot transmissions, the shell rear portion still is provided with the material entry, the shell front end has an extrusion section, both ends draw close towards the centre along forward direction about the extrusion section, the extrusion section front end links up the section of taking shape of a horizontal straight section of thick bamboo structure and forms and extrudees the head, it is provided with mix water interpolation structure to extrude the head position, mix water interpolation structure has the delivery port around extruding head inner chamber circumference and setting.

7. The dry-process produced gypsum block of claim 6, wherein: the mixed water adding structure comprises a first water outlet positioned at the front part of the inner cavity of the extrusion section and a second water outlet positioned at the front end of the inner cavity of the forming section, and the first water outlet and the second water outlet are arranged along the circumferential direction;

a core mould structure is also arranged in the extrusion port, the core mould structure comprises an inner core which is horizontally arranged in the inner cavity of the extrusion port, the rear end of the inner core is fixed on a vertically arranged retainer, and the periphery of the retainer is fixedly arranged on the inner cavity of the extrusion section of the shell;

the rear part of the inner core is positioned in the extrusion section and is in a frustum shape with the diameter of the end surface increasing forwards, and the front part of the inner core is positioned in the forming section and is in a straight cylinder shape.

8. The dry-process produced gypsum block of claim 1, wherein: a section of follow-up roller way is arranged in the conveying roller way above the longitudinal translation mechanism in a linking manner, the follow-up roller way comprises a roller seat sliding groove which is longitudinally arranged on the conveying rack, the length of the roller seat sliding groove is greater than that of the gypsum board, a plurality of sliding roller seats are arranged in the roller seat sliding groove in a longitudinally sliding manner, sliding rollers are arranged on the sliding roller seats, the sliding rollers and the rollers fixedly arranged on the conveying roller way are positioned at the same horizontal height, folding connecting rods are hinged on the sliding roller seats in a vertically rotatable manner, and the end parts of the folding connecting rods of the adjacent sliding roller seats are hinged and connected to form a telescopic connecting rod combination extending along the longitudinal direction; the follow-up portal frame is positioned in the middle of the follow-up roller way, the front end and the rear end of the follow-up portal frame are respectively provided with one section of telescopic connecting rod combination, one end of the telescopic connecting rod combination in the length direction is hinged on the follow-up portal frame, and the other end of the telescopic connecting rod combination is hinged on a carrier roller seat which is fixedly arranged adjacent to the follow-up roller way.