A dry forming process and equipment for non-surfacing gypsum board

Abstract

The present invention relates to a production technology of building profiles, and in particular to a dry-process forming process and equipment for unfaced gypsum boards, which mainly include: a forming mechanism, a spreading mechanism, a mixing mechanism, and a finishing mechanism. Through the development of a low-water anti-adhesion stirring process and supporting mechanisms, a slurry spreading process and supporting mechanisms, and a three-stage continuous forming process and supporting mechanisms, a significant innovation in the traditional gypsum board production technology is achieved. The process involves stirring cooked gypsum powder with a low amount of water into a semi-fluid slurry, and then achieving dry-process continuous manufacturing of gypsum boards through a three-stage extrusion molding and secondary water replenishment process, with the actual water consumption being controllable to about 20. The upper and lower surfaces of the dry-process manufactured gypsum boards do not require facing paper or fiber cloth, the surface morphology of the boards is dense, and the tensile and compressive strengths are higher than those of traditional paper-faced gypsum boards and fiber gypsum boards, thereby saving a large amount of paper and, in particular, significantly reducing drying costs.

Description

Technical Field

[0001] The invention relates to a production technology of building profiles, in particular to a dry-forming process and equipment for unfaced gypsum boards. Background Art

[0002] The production and molding of gypsum building profiles is based on the characteristics of gypsum undergoing chemical reaction and rapid solidification after adding water. The main raw material, gypsum powder (also known as hemihydrate gypsum CaSO4•0.5H2O), reacts with water to form water-insoluble solid dihydrate gypsum. This process is called solidification molding. The theoretical water requirement for hydration reaction is 18.62%, while the actual water requirement for the production of gypsum products is about 70%. The reason is that excess water is added to dilute the gypsum powder into liquid gypsum slurry with sufficient fluidity, which is then cast into a mold formed by facing paper or a belt mold to form a gypsum board. Common products include paper-faced gypsum board, fiber cloth-faced (paper-free) gypsum board, etc. The hydration reaction time is usually 1-3 minutes, which is very fast. In traditional gypsum board production, the board remains wet after curing and cannot be dried naturally in a short period of time. Therefore, the wet gypsum board must be heated and dried in a dryer. This drying process consumes a large amount of electric or gas-fired heat, and the drying cost accounts for approximately 50%-60% of the gypsum board production cost. A theoretically feasible solution to reduce drying costs is to reduce water consumption. However, if the water consumption falls below 70%, the viscosity of the gypsum slurry increases, the fluidity decreases, the hydration reaction is incomplete, and the molding effect is difficult to control, making cast-in-place production impossible. Currently, there is a semi-dry production process on the market that uses approximately 50% water, but it can only produce small, individual gypsum profiles, such as gypsum blocks, and cannot produce large, continuous panels.

[0003] The present invention designs a dry forming process and equipment for unfaced gypsum boards. The actual water consumption can be controlled at about 20%. The cooked gypsum powder is stirred with a low amount of water to form a semi-fluid paste. Then, through the process of three-stage extrusion molding and secondary water replenishment, the dry manufacturing of gypsum boards is realized. Due to the low water consumption, it is figuratively called dry forming. The upper and lower surfaces of the dry-formed gypsum boards do not need to be covered with facing paper or fiber cloth. The surface morphology of the board is dense, and the tensile and compressive strengths are higher than those of traditional paper-faced gypsum boards and fiber gypsum boards, which saves a lot of paper and can significantly reduce the drying cost. The length and width of the gypsum board manufactured by the present invention are comparable to those of traditional paper-faced gypsum boards. It can be fireproof and waterproof without the need for facing paper and can be directly used in low-intensity application scenarios such as simple partitions and space partitions. The main innovations of the process and equipment of the present invention include: the development of a low-water anti-adhesion stirring process and supporting mechanisms, the development of a slurry spreading process and supporting mechanisms, and the development of a three-stage continuous forming process and supporting mechanisms, which have achieved disruptive innovation in traditional gypsum board production technology. Summary of the Invention

[0004] A dry forming process for non-surfacing gypsum board, characterized in that:

[0005] Step 1, raw material mixing process: set up a mixing mechanism and a spraying device; by weight, the raw materials and the mixing ratio supplied to the mixing mechanism are: 100 parts of gypsum powder, 20 parts of process water, 0.3 parts of glass fiber, and 0.6 parts of retarder; the raw materials and the mixing ratio supplied to the spraying device are: 1 part of process water and 0.05 parts of accelerator;

[0006] Step 2, raw material supply process: gypsum powder and glass fiber are each delivered to the transfer bin of solid raw materials through a metering device, so that the glass fiber is mixed with the gypsum powder. Retarder and process water are each delivered to the transfer water tank of liquid raw materials through a metering device, so that the retarder is pre-placed in the process water according to a proportion and mixed. Each raw material is continuously supplied to the mixing mechanism according to a proportion;

[0007] Step 3, rapid mixing process: two feed ports are provided on the top of the mixing mechanism to continuously receive solid raw materials; multiple water inlets are provided on the top of the mixing mechanism, which are connected in parallel to the transfer water tank, and process water and retarder mixture are continuously and evenly injected into the mixing mechanism at multiple points;

[0008] Step 4: High-speed stirring process: In the mixing mechanism, high-speed stirring is performed to generate slurry. The stirring process time is set to 10-15 seconds. Two discharge ports are set at the bottom of the mixing mechanism. The slurry is continuously dropped onto the mold belt by gravity. The dropping time is set to 2-3 seconds.

[0009] Step 5: Slurry spreading process: Set up a spreading mechanism to spread the slurry on the mold belt evenly, so that the height of the slurry is close to twice the rated thickness of the gypsum board;

[0010] Step 6: Three-stage continuous forming process: The first stage uses the upper and lower extrusion structure of the first-stage pressure roller, and the forming thickness is close to 1.5 times the rated thickness of the gypsum board; the second stage uses the second-stage elastic pressure roller group to extrude and form, and the forming thickness is set to 1.1 times the rated thickness of the gypsum board; the third stage uses the three-stage fixed pressure roller group to maintain pressure and form, and the forming thickness is set to the rated thickness of the gypsum board;

[0011] Step 7: Between the second and third forming processes, a secondary water replenishment process is set up, in which a spray device is used to spray a mist of "process water + coagulant" on the upper surface of the gypsum board;

[0012] Step 8, finishing process: The pressed and formed continuous length gypsum board is conveyed along the roller conveyor, and is cut to length and trimmed in cross section at the same time. After passing the drying process, it is plastic-sealed and stacked.

[0013] A dry-process forming device for unfaced gypsum boards, comprising: a forming mechanism, a spreading mechanism, a mixing mechanism, and a finishing mechanism; the forming mechanism, the spreading mechanism, and the mixing mechanism are sequentially connected from left to right, and the finishing mechanism is arranged on the left side of the forming mechanism and connected via a roller conveyor;

[0014] The molding mechanism includes: a press frame, an upper belt, a driven roller, a mold belt, a power device, a belt cleaning device, an elastic vibration device, a guide roller group, a spray device, a deviation correction device, a release agent spraying device; a first-level pressing roller, a second-level elastic pressing roller group, a third-level fixed pressing roller group, a transmission roller group, and a support roller;

[0015] The press frame is a rectangular column structure, the conveying roller group is horizontally arranged in the middle of the press frame, the right part of the conveying roller group is the feed end, and the left part is the plate discharge end; upper and lower cantilever beams are respectively arranged at the feed end, the left end of the cantilever beam is installed on the press frame, and the right end is suspended, wherein the upper cantilever beam is fixedly installed, and the lower cantilever beam is vertically adjustable in height, and the driven rollers are vertically arranged and respectively installed on the upper and lower cantilever beams; multiple guide roller groups are respectively arranged at the top and bottom of the press frame; two primary pressing rollers are provided, which are vertically installed on the right column of the press frame;

[0016] The power device includes: a forming drive motor, a motor base, a transmission chain plate, and an active roller; two active rollers are provided and vertically fixedly installed at the plate outlet end of the press frame; the motor base is installed at the bottom of the press frame, and the forming drive motor is fixedly installed on it, which drives the two active rollers to rotate synchronously in opposite directions through the transmission chain plate;

[0017] The mold belt is a continuous U-groove rotary belt, the inner groove height of the U-groove is equal to twice the thickness of the gypsum board, and the inner groove width is greater than or equal to 1.1 times the width of the gypsum board; the mold belt is tensioned and connected by a lower driven roller, a lower active roller, a lower first-level pressure roller, and a bottom guide roller group; the upper belt is a flat belt, tensioned and connected by an upper driven roller, an upper active roller, an upper first-level pressure roller, and a top guide roller group, and the width of the upper belt is equal to the inner groove width of the U-groove; the upper belt and the mold belt are horizontally laid on the conveyor roller group in sequence, the upper belt is located in the U-groove of the mold belt, and the two belts are driven by a power device to rotate synchronously;

[0018] The first-stage pressure roller, the second-stage elastic pressure roller group, and the third-stage fixed pressure roller group are sequentially arranged above the conveyor roller group at the feed end and the plate discharge end of the press frame, and are located above the upper belt. The upper belt between the second-stage elastic pressure roller group and the third-stage fixed pressure roller group is suspended upward by a support roller. A spray device is arranged longitudinally under the suspended upper belt.

[0019] The belt cleaning device, deviation correction device and release agent spraying device are arranged on the top of the press frame, and when the upper belt rotates, scraping cleaning, lateral deviation correction and release agent spraying on the outer surface of the upper belt are respectively performed.

[0020] A further solution is that the secondary elastic pressure roller group includes: a left tensioning wheel, a short-stroke pressure roller group, a single-link fixed seat, and a flexible pressure-carrying body; a horizontal short-stroke pressure roller group is connected to the lower side of the flexible pressure-carrying body, and a left tensioning wheel is provided at the lower left corner; a group of single-link fixed seats are provided in the left and right directions, and each group has one roller in the front and rear directions, the lower end of which is fixed to the press frame and the upper end is fixed to the flexible pressure-carrying body, and the height is adjustable; the elastic vibration device shown is an active excitation device, the upper end of which is installed on the top of the press frame 1-1 and the lower end is connected to the upper left corner of the single-link fixed seat;

[0021] The three-stage fixed pressure roller group includes: a long-distance roller group, a double fixed seat, a fixed pressure-bearing body, and a right tensioning pulley. A horizontal long-distance roller group is connected to the lower part of the fixed pressure-bearing body, and a right tensioning pulley is set at the lower right corner; two groups of double fixed seats are provided in the left and right directions, with one roller set in each group at the front and back. The lower end is fixed to the press frame and the upper end is fixed to the fixed pressure-bearing body, and the height is adjustable.

[0022] The total left and right length of the short-range roller group is set to 40-50cm, and the forming thickness is set to 1.1 times the rated thickness of the gypsum board; the total left and right length of the long-range roller group is set to 80-100cm, and the forming thickness is set to the rated thickness of the gypsum board.

[0023] A further solution is that the mixing mechanism is arranged at the paste feeding end on the right side of the forming mechanism, and includes: a feeding port, a power transmission shaft, a stirring motor, a motor support, a stirring base, a stirring frame, a discharge chute, a stirring cylinder, a water injection device, a cage shaft, a lifting bracket, a cage seat, a stirring shaft, and a scraper;

[0024] The mixing mechanism is an internally connected double-drum mixing mechanism with two mixing drums connected in parallel, a feed port is provided at the top of each side end of each drum, and a discharge port is provided at the bottom of each other end, a discharge chute is provided at the lower end of the two discharge ports, and the lower end of the discharge chute extends into the U-shaped groove on the upper surface of the mold belt at the feed end on the right side of the press frame; multiple groups of water injection devices are provided on the top of the mixing drum; multiple mixing shafts are connected by fixed frames at both ends to form an integrated fixed cage shaft structure, and a central shaft and a power transmission component are respectively provided at the center of the fixed frames at both ends of the cage shaft, and two groups of cage shafts are arranged in parallel and are respectively located in the two mixing drums, and the central shaft and the power transmission component are located outside the end surfaces on both sides of the mixing drum, and the two groups of cage shafts are meshed and connected with each other through the power transmission component, and the central shafts at both ends of one group of cage shafts are simultaneously connected to the two ends of the power transmission shaft through the power transmission component; a scraper is fixedly installed next to each mixing shaft;

[0025] The lower parts of the two mixing drums are supported by a cage seat as a whole, and a lifting bracket is provided at the lower part of the cage seat; a mixing frame is provided on the side of the mixing drum, a mixing base is provided on the upper part of the mixing frame, a motor support and a mixing motor are provided on the mixing base, and a power transmission shaft is connected to the mixing motor drive.

[0026] A further solution is that the spreading mechanism is arranged between the flat belt at the slurry feeding end and the U-groove mold belt, and includes: a fixed seat, a longitudinal scraper, a transverse drive motor, a synchronous pulley, a transverse guide rail, a transverse scraper, and a connecting seat;

[0027] The spreading mechanism is fixedly mounted on the lower cantilever beam through fixed seats at both ends. The longitudinal scraper is a static structure, and the bottom of the longitudinal scraper is set flush with the upper surface of the U-shaped groove of the mold belt; the transverse scraper is a dynamic mechanism, with two transversely parallel pieces set, which are respectively mounted on transverse guide rails through connecting seats. The transverse drive motor drives the transverse guide rails through synchronous pulleys to drive the two transverse scrapers to move back and forth transversely, and the bottom of the transverse scraper is flush with the upper surface of the U-shaped groove of the mold belt.

[0028] A further solution is that the belt cleaning device includes: a cleaning drive motor and a rotating roller brush; the upper belt and the rotating roller brush maintain contact, and the rotating roller brush scrapes and cleans the outer surface of the upper belt under the drive of the cleaning drive motor.

[0029] A further solution is that the correction device includes: an adjustment handle, an adjustment screw, and a correction roller; the upper belt is arranged on the correction roller, and the upper belt is corrected by the adjustment handle and the adjustment screw to ensure that the upper belt remains directly above the U-shaped groove of the mold belt.

[0030] A further solution is that the finishing mechanism includes a roller conveying device, a length cutting device, a cross-section trimming and cutting device, a drying device, and a plastic sealing and stacking device. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is the overall main view of the device;

[0032] Figure 2 This is the main view of the forming press;

[0033] Figure 3 It is the rear view of the forming press;

[0034] Figure 4 Schematic diagram of the three-stage pressure plate mechanism

[0035] Figure 5 This is a diagram of the power unit of the forming press;

[0036] Figure 6 This is the main view of the mixing mechanism;

[0037] Figure 7 This is the internal structure diagram of the mixing mechanism;

[0038] Figure 8 This is a schematic diagram of the paving mechanism;

[0039] Figure 9 This is a schematic diagram of a belt cleaning device;

[0040] Figure 10 Schematic diagram of the correction device. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application;

[0042] The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without departing from the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0043] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "comprising" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations;

[0044] In the description of this application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of this application; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0045] A dry forming process for non-surfacing gypsum board, characterized in that:

[0046] Step 1, raw material mixing process: a mixing mechanism 3 and spraying devices 1-9 are provided; by weight, the raw materials and the mixing ratio supplied to the mixing mechanism 3 are: 100 parts of gypsum powder, 20 parts of process water, 0.3 parts of glass fiber, and 0.6 parts of retarder; the raw materials and the mixing ratio supplied to the spraying devices 1-9 are: 1 part of process water and 0.05 parts of accelerator;

[0047] Step 2, raw material supply process: gypsum powder and glass fiber are each delivered to the solid raw material transfer bin through a metering device, so that the glass fiber is mixed with the gypsum powder. Retarder and process water are each delivered to the liquid raw material transfer tank through a metering device, so that the retarder is pre-placed in the process water according to a proportion and mixed. Each raw material is continuously supplied to the mixing mechanism 3 according to a proportion;

[0048] Step 3, rapid mixing process: two feed ports are provided on the top of the mixing mechanism 3 to continuously receive solid raw materials; multiple water inlets are provided on the top of the mixing mechanism 3, which are connected in parallel to the transfer water tank, so that process water and retarder mixture are continuously and evenly injected into the mixing mechanism at multiple points;

[0049] Step 4, high-speed stirring process: in the mixing mechanism 3, high-speed stirring is performed to generate slurry, and the stirring process time is set to 10-15 seconds; two discharge ports are set at the bottom of the mixing mechanism 3, and the slurry is continuously dropped onto the mold belt 1-4 by gravity, and the dropping time is set to 2-3 seconds. The upper limit value of the above-mentioned stirring and dropping process time is determined by a specific test of the gypsum curing time based on the process and equipment of the present invention, and the lower limit value is determined by a specific test of the gypsum molding effect. The specific optimized value can be determined by testing based on the quality of the raw gypsum powder, the amount of process water and retarder added;

[0050] Step 5: Slurry spreading process: A spreading mechanism 2 is set up to spread the slurry on the mold belts 1-4 evenly, so that the slurry height is close to twice the rated thickness of the gypsum board. Traditional gypsum board molding uses liquid gypsum slurry with excellent fluidity. The gypsum slurry relies on its own gravity flow to achieve relatively uniform spreading. However, the slurry in the present invention has very low water content and poor fluidity, so an external spreading mechanism is required for active spreading to control the width and height of the slurry on the molding belt.

[0051] Step 6: Three-stage continuous forming process: The first stage uses the upper and lower extrusion structure of the first-stage pressure rollers 1-12, and the forming thickness is close to 1.5 times the rated thickness of the gypsum board; the second stage uses the second-stage elastic pressure roller group 1-13 for extrusion forming, and the forming thickness is set to 1.1 times the rated thickness of the gypsum board; the third stage uses the third-stage fixed pressure roller group 1-14 for pressure-maintaining forming, and the forming thickness is set to the rated thickness of the gypsum board. The three-stage forming scheme can gradually release the internal stress of the board during extrusion, and the main body of the board is dense and uniform.

[0052] Step 7: Between the second and third forming steps, a secondary water replenishment step is provided, wherein the spraying devices 1-9 spray a mist of "process water + coagulant" on the upper surface of the gypsum board. This ensures that the curing reaction on the upper surface of the board is more complete and uniform, and the overall surface quality is high-quality, smooth, and free of microcracks.

[0053] Step 8, Finishing: The pressed, continuous lengths of gypsum board are conveyed along a roller conveyor, where they are simultaneously cut to length and trimmed for cross-section. After drying, the boards are plastic-sealed and stacked. This finishing process follows conventional technology. However, due to reduced water consumption, this process also reduces energy consumption and shortens the drying process.

[0054] A dry forming equipment for non-surfaced gypsum board, such as Figure 1 As shown, it includes: a forming mechanism 1, a spreading mechanism 2, a mixing mechanism 3, and a sorting mechanism 4; the forming mechanism 1, the spreading mechanism 2, and the mixing mechanism 3 are connected in sequence from left to right, and the sorting mechanism 4 is arranged on the left side of the forming mechanism 1 and is connected through a roller.

[0055] The forming mechanism 1 is as follows Figure 2 As shown, it includes: a press frame 1-1, an upper belt 1-2, a driven roller 1-3, a mold belt 1-4, a power unit 1-5, a belt cleaning device 1-6, an elastic vibration device 1-7, a guide roller group 1-8, a spray device 1-9, a correction device 1-10, a release agent spraying device 1-11; a first-level pressure roller 1-12, a second-level elastic pressure roller group 1-13, a third-level fixed pressure roller group 1-14, a transmission roller group 1-15, and a support roller 1-16.

[0056] The press frame 1-1 is a rectangular column structure. Figure 2 As shown, the conveying roller group 1-15 is horizontally arranged in the middle of the press frame 1-1, the right part of the conveying roller group 1-15 is the feeding end, and the left part is the board outlet end; upper and lower cantilever beams are respectively arranged at the feeding end, the left end of the cantilever beam is installed on the press frame 1-1, and the right end is suspended, wherein the upper cantilever beam is fixedly installed, and the lower cantilever beam is vertically adjustable in height, and the driven rollers 1-3 are vertically arranged with two, respectively installed on the upper and lower cantilever beams; a plurality of guide roller groups 1-8 are respectively arranged at the top and bottom of the press frame 1-1; the first-level pressing rollers 1-12 are arranged with two, which are vertically installed on the right column of the press frame 1-1, the upper first-level pressing roller is height-adjustable, and the lower first-level pressing roller is fixed, the vertical gap between the upper and lower first-level pressing rollers is 1-2 times the thickness of the gypsum board, and the upper and lower gaps of the two pressing rollers are adjustable.

[0057] The power devices 1-5 are as follows Figure 5As shown, it includes: a forming drive motor 1-5-1, a motor base 1-5-2, a transmission chain plate 1-5-3, and an active roller 1-5-4; two active rollers 1-5-4 are provided, which are vertically fixedly installed at the plate outlet end of the press frame 1-1; the motor base 1-5-2 is installed at the bottom of the press frame 1-1, and the forming drive motor 1-5-1 is fixedly installed on it, which drives the two active rollers 1-5-4 to rotate synchronously in the opposite direction through the transmission chain plate 1-5-3.

[0058] The mold belt 1-4 is a continuous U-groove rotary belt, the inner groove height of the U-groove is equal to 2 times the thickness of the gypsum board, and the inner groove width is greater than or equal to 1.1 times the width of the gypsum board; the mold belt 1-4 is tensioned and connected by the lower driven roller, the lower active roller, the lower primary pressure roller and the bottom guide roller group; the upper belt 1-2 is a flat belt, such as Figure 2 and Figure 3 As shown, the upper belt 1-2 is tensioned and connected by the upper driven roller 1-3, the upper active roller 1-5-4, the upper first-level pressure roller 1-12 and the top guide roller group 1-8. The width of the upper belt 1-2 is equal to the inner groove width of the U-shaped groove; the upper belt 1-2 and the mold belt 1-4 are horizontally laid on the conveying roller group 1-15 in sequence. The upper belt 1-2 is located in the U-shaped groove of the mold belt 1-4, and the two belts are driven to rotate synchronously by the power device 1-5.

[0059] like Figure 2 As shown, the first-level pressure roller 1-12, the second-level elastic pressure roller group 1-13, and the third-level fixed pressure roller group 1-14 are arranged in sequence above the conveying roller group 1-15 at the feed end and the plate discharge end of the press frame 1-1, and are located above the upper belt 1-2. The upper belt 1-2 between the second-level elastic pressure roller group 1-13 and the third-level fixed pressure roller group 1-14 is suspended upward by the support roller 1-16. Below the suspended upper belt 1-2, a spray device 1-9 is arranged longitudinally from front to back.

[0060] The belt cleaning device 1-6, the deviation correction device 1-10, and the release agent spraying device 1-11 are arranged on the top of the press frame 1-1, and when the upper belt 1-2 rotates, scraping cleaning, lateral deviation correction and release agent spraying on the outer surface of the upper belt are respectively performed.

[0061] like Figure 4As shown, the secondary elastic pressure roller group 1-13 includes: a left tensioning wheel 1-13-1, a short-range pressure roller group 1-13-2, a single-link fixed seat 1-13-3, and a flexible pressure-bearing body 1-13-4; a horizontal short-range pressure roller group 1-13-2 is connected to the lower part of the flexible pressure-bearing body 1-13-4, and a left tensioning wheel 1-13-1 is set at the lower left corner; a group of single-link fixed seats 1-13-3 are set in the left and right directions, and each group is set with one in the front and back directions, the lower end of which is fixed on the press frame 1-1, and the upper end is fixed on the flexible pressure-bearing body 1-13-4, and the height is adjustable; the elastic vibration device 1-7 shown is an active excitation device, the upper end of which is installed on the top of the press frame 1-1, and the lower end is connected to the upper left corner of the single-link fixed seat 1-13-3.

[0062] The three-stage fixed pressure roller group 1-14 includes: a long-distance roller group 1-14-1, a double fixed seat 1-14-2, a fixed pressure-bearing body 1-14-3, and a right tensioning wheel 1-14-4. A horizontal long-distance roller group 1-14-1 is connected to the lower part of the fixed pressure-bearing body 1-14-3, and a right tensioning wheel 1-14-4 is set in the lower right corner; two groups of double fixed seats 1-14-2 are arranged in the left and right directions, and one is arranged in the front and back of each group. The lower end is fixed on the press frame 1-1, and the upper end is fixed on the fixed pressure-bearing body 1-14-3, and the height is adjustable.

[0063] The total length of the short-range roller group 1-13-2 is set to 40-50 cm, and the molding thickness is set to 1.1 times the rated thickness of the gypsum board; the total length of the long-range roller group 1-14-1 is set to 80-100 cm, and the molding thickness is set to the rated thickness of the gypsum board.

[0064] The mixing mechanism 3 is arranged at the paste feeding end on the right side of the forming mechanism 1. Figure 6 As shown, it includes: a feed port 3-1, a power transmission shaft 3-2, a stirring motor 3-3, a motor support 3-4, a stirring base 3-5, a stirring frame 3-6, a discharge chute 3-7, a stirring barrel 3-8, and a water injection device 3-9. Figure 7 As shown, it also includes: a cage shaft 3-10, a lifting bracket 3-11, a cage seat 3-12, a stirring shaft 3-13, and a scraper 3-14.

[0065] The mixing mechanism 3 is an internally connected double-drum mixing mechanism with two mixing drums 3-8 connected in parallel. A feed port 3-1 is provided on the top of each drum side end, and a discharge port is provided on the bottom of the other end. A discharge chute 3-7 is provided at the lower end of each of the two discharge ports. The lower end of the discharge chute 3-7 extends into the U-shaped groove on the upper surface of the mold belt 1-4 at the right side of the feed end of the press frame 1-1; multiple groups of water injection devices 3-9 are provided on the top of the mixing drum 3-8; multiple mixing shafts 3-13 are connected in a surrounding manner through the fixing frames at both ends to form an integrated fixed cage. The cage shaft 3-10 has a structure, and a central shaft and a power transmission component are respectively set at the center of the fixed frames at both ends of the cage shaft 3-10. Two sets of cage shafts 3-10 are set in parallel and are respectively located in the two mixing drums. The central shaft and the power transmission component are located outside the end faces of both sides of the mixing drum. The two sets of cage shafts 3-10 are meshed and connected with each other through the power transmission component. The central shafts at both ends of one set of cage shafts 3-10 are simultaneously connected to the two ends of the power transmission shaft 3-2 through the power transmission component; a scraper 3-14 is fixedly installed next to each mixing shaft 3-13.

[0066] The rotation radius of the cage shaft is 20-50mm lower than the inner diameter of the mixing drum. Both ends of the scraper and the mixing shaft are connected in a circumferential manner through fixed frames at both ends. The scraper blade is set outward, and the blade rotation radius is slightly smaller than the inner diameter of the mixing drum by 1-2mm; the center shafts at both ends of the cage shaft 3-10 are simultaneously connected to the two ends of the power transmission shaft 3-2 through power transmission components, that is, the power transmission shaft 3-2 synchronously drives the two ends of the cage shaft 3-10. The reason is that the cage shaft 3-10 is a combined shaft structure rather than an integrated rigid shaft structure. The rigidity of the combined shaft structure is slightly poor. When the rotation resistance is large, if only the single-side center shaft is driven, the overall rotation of the cage shaft 3-10 requires the rigidity of the mixing shaft itself to transmit power to the other end, which will cause unstable rotation and even deformation of the cage shaft 3-10 structure. The power transmission shaft 3-2 synchronously drives the center shafts at both ends of the cage shaft 3-10, and the cage shaft can maintain stable rotation in the drum.

[0067] The lower parts of the two mixing drums 3-8 are integrally supported by a cage seat 3-12. Four lifting brackets 3-11 are respectively arranged at the four corners of the lower part of the cage seat, which are divided into two groups, front and rear, and controlled separately. By controlling the height difference between the two groups of brackets, the inclination of the mixing drum 3-8 is controlled, so that the slurry inside the mixing drum 3-8 is sent downward by gravity and falls onto the U-shaped groove of the mold belt 1-4 at the feed end. The greater the inclination, the faster the stirring speed and the faster the downward falling speed; a mixing frame 3-6 is arranged on the side of the mixing drum 3-8, a mixing base 3-5 is arranged on the upper part of the mixing frame, a motor support 3-4 and a stirring motor 3-3 are arranged on the stirring base, and a power transmission shaft 3-2 is connected to the stirring motor 3-3 for drive.

[0068] The spreading mechanism 2 is arranged between the flat belt at the slurry feeding end and the U-groove mold belt. Figure 8 As shown, it includes: a fixed seat 2-1, a longitudinal scraper 2-2, a transverse drive motor 2-3, a synchronous pulley 2-4, a transverse guide rail 2-5, a transverse scraper 2-6, and a connecting seat 2-7.

[0069] The paving mechanism 2 is fixed to the lower cantilever beam via fixed mounts 2-1 at both ends. The longitudinal scraper 2-2 is a static structure, with its bottom flush with the upper surface of the U-shaped groove of the mold belt 1-4. The transverse scraper 2-6 is a dynamic mechanism, with two transversely parallel scrapers 2-6 mounted on transverse guide rails 2-5 via coupling mounts 2-7. A transverse drive motor 2-3 drives the transverse guide rails 2-5 via synchronous pulleys 2-4, driving the two transverse scrapers 2-6 in transverse reciprocating translation. The bottom of the transverse scraper 2-6 is flush with the upper surface of the U-shaped groove of the mold belt 1-4. The two transverse scrapers 2-6 are provided to improve efficiency, and each reciprocating translation distance is sufficient to be equal to half the width of the U-shaped groove.

[0070] The belt cleaning device 1-6 is as follows Figure 9 As shown, it includes: a cleaning drive motor 1-6-1 and a rotating roller brush 1-6-2. The upper belt 1-2 and the rotating roller brush maintain contact, and the rotating roller brush is driven by the cleaning drive motor 1-6-1 to scrape and clean the outer surface of the upper belt 1-2. If water injection is required during cleaning, a wastewater collection device must be provided.

[0071] The correcting device 1-10 is as follows Figure 10 As shown, it includes: an adjusting handle 1-10-1, an adjusting screw 1-10-2, and a correcting roller 1-10-3; the upper belt 1-2 is arranged on the correcting roller 1-10-3, and the upper belt 1-2 is corrected by the adjusting handle 1-10-1 and the adjusting screw 1-10-2 to ensure that the upper belt 1-2 remains directly above the U-shaped groove of the mold belt 1-4.

[0072] The finishing mechanism 4 includes a roller conveying device, a length cutting device, a cross-section trimming and cutting device, a drying device, and a plastic sealing and stacking device. The finishing mechanism is a well-known technology.

[0073] Example 1, working process of mixing mechanism 3:

[0074] The mixed gypsum powder and glass fiber in the transfer bin are continuously fed into the feed port 3-1 of the two mixing drums 3-8 of the mixing mechanism 3. Process water and retarder are simultaneously injected into the drum through multiple water injection devices 3-9 at the top of the mixing drum 3-8, allowing the process water to fall quickly and evenly into the drum. Simultaneously, the cage shaft 3-10 is driven to rotate by the power transmission shaft 3-2, and the mixing shaft 3-13, which is connected to the cage shaft 3-12, rotates to stir the gypsum powder, glass fiber, process water, and retarder. Due to the low water addition rate, the resulting slurry is semi-fluid. The stirring time is set to 10-15 seconds. The retarder slows the curing time, and the glass fiber strengthens the board's strength and toughness. The height difference between the two sets of lifting brackets 3-11 is then adjusted, and the mixing drum 3-8 is kept tilted, allowing the slurry inside the drum to flow out of the discharge chute 3-7 under its own gravity onto the U-shaped groove of the mold belt 1-4. The slurry drop time is set to 2-3 seconds. Since the viscosity of the paste is relatively high and the curing reaction time is very short, a scraper 3-14 device is set up to rotate synchronously with the stirring shaft 3-13 to scrape off the paste adhering to the inner wall of the mixing cylinder 3-8 in real time before the curing reaction, so as to avoid the paste adhering firmly to the inner wall during the curing reaction and being difficult to clean. The double-cylinder mixing mechanism is set up to achieve rapid mixing and stirring. Since the double cylinders are connected in parallel and internally, two sets of cage shafts 3-10 are required to rotate in parallel. The middle connecting part of the double cylinders is connected inside. Figure 7 As shown, the stirring shafts 3-13 on the two sets of cage shafts 3-10 may interfere with each other and collide with each other, so it is necessary to control the corresponding stirring shafts 3-13 to rotate alternately at the connection point of the double cylinders;

[0075] If the mixing mechanism 3 stops, it is necessary to flush the inside of the cylinder with a large amount of process water to flush out the residual paste before stopping the machine. Otherwise, once it solidifies, the cylinder must be opened for hard cleaning;

[0076] Driven by the power device 1-5, the upper belt 1-2 rotates clockwise, and the mold belt 1-4 rotates counterclockwise synchronously, driving the paste in the U-shaped groove to be transported to the paste feeding end of the molding mechanism 1;

[0077] At the paste feeding end of the molding mechanism 1, it is composed of the upper belt 1-2 of the two driven rollers 1-3 wrapped around the upper and lower cantilever beams and the right end of the mold belt 1-4. The lower cantilever beam is a vertical height adjustable structure, such as Figure 2As shown, it can drive the right end driven roller in the lower group of driven rollers to adjust its height, and can make the upper surface of the right part of the mold belt 1-4 maintain an angle of -20° to -10° with the upper surface of the lower first-level pressure roller, that is, the feeding angle of the U-groove mold belt is between -20° and -10°. The slurry is transported obliquely upward, and the slurry's own gravity is downward. Therefore, the gravity of the slurry can compress the semi-fluid slurry more tightly, and at the same time facilitate the spreading mechanism 2 to spread the slurry smoothly, while the liquid slurry with good fluidity cannot be conventionally transported at a negative angle.

[0078] Example 2, working process of the spreading mechanism 2 and the forming mechanism 1:

[0079] Due to the poor fluidity of the slurry, it must first be initially spread and leveled in the U-shaped trough. Therefore, after the slurry reaches the feed end, two transverse scrapers 2-6 reciprocate horizontally to initially level the slurry horizontally. Then, the static longitudinal scraper 2-2 initially levels the slurry longitudinally, bringing the initial slurry height to approximately twice the rated thickness of the gypsum board. To prevent excessive slurry from adhering to the transverse scrapers 2-6 and longitudinal scrapers 2-2 and causing it to solidify, the scrapers are easily removable and can be quickly replaced at regular intervals.

[0080] After being initially flattened by the spreading mechanism 2, the slurry is conveyed to the first-stage pressing rollers 1-12. The upper first-stage pressing roller acts on the upper belt 1-2, while the lower first-stage pressing roller supports the mold belt 1-4. The slurry is extruded and formed within the U-shaped groove. By setting the vertical gap between the upper and lower stage pressing rollers, the forming thickness is close to 1.5 times the rated thickness of the gypsum board. At this point, the slurry is initially extruded into a flat board shape. The primary forming process mainly forms the slurry into a flat board shape, but it also retains loose pores inside to allow the process water to fully contact the gypsum, promoting a more thorough curing reaction.

[0081] The initially formed flat panel is conveyed to the position of the secondary elastic pressure roller group. The secondary elastic pressure roller group 1-13 squeezes the flat panel through the upper belt 1-2, so that the thickness of the flat panel is squeezed to 1.1 times the rated thickness of the gypsum board. The flexible pressure-bearing body 1-13-4 and the press frame 1-1 are fixed by a single-joint fixing seat 1-13-3, that is, the connection between the secondary elastic pressure roller group 1-13 and the press frame 1-1 is a non-completely rigid single-point connection method. When the elastic vibration device 1-7 is excited, the secondary elastic pressure roller group 1-13 can produce an elastic vibration effect on the upper belt 1-2 and the lower flat panel, thereby greatly reducing the internal stress of the flat panel during the solidification reaction, improving the density of the panel, and reducing tiny stress cracks. The flexible pressure-bearing body 1-13-4 itself is a rigid structure. Its flexibility refers to the fact that when the elastic vibration device 1-7 excites the flexible pressure-bearing body 1-13-4, the secondary elastic pressure roller group 1-13 has a small rotational swing amplitude, which is called flexibility.

[0082] The flat panel is conveyed to the three-stage fixed pressure roller assembly. The three-stage fixed pressure roller assembly 1-14 compresses the flat panel via the upper belt 1-2, bringing the panel thickness to the rated thickness of the gypsum board. A double-mounted fixed base 1-14-2 secures the fixed pressure-carrying element 1-14-3 to the press frame 1-1. This is a completely rigid, two-point connection, ensuring consistent panel thickness. The fixed pressure-carrying element is a different name from the flexible pressure-carrying element, making it easier for those skilled in the art to understand. The long-range roller group 1-14-1 is relative to the short-range pressure roller group 1-13-2 of the secondary elastic pressure roller group 1-13. The left and right total length of the long-range roller group 1-14-1 is set longer, and the tertiary fixed pressure roller group 1-14 has a better pressure-maintaining effect on the upper belt 1-2 and the flat plate, ensuring the accurate thickness and density of the plate. The left and right total length of the short-range pressure roller group 1-13-2 is set shorter to highlight the better flexibility of the secondary elastic pressure roller group 1-13 on the upper belt 1-2 and the flat plate.

[0083] The support roller 1-16, the left tensioning wheel 1-13-1 and the right tensioning wheel 1-14-4 are suspended upward to lift the upper belt 1-2 between the secondary elastic pressure roller group 1-13 and the tertiary fixed pressure roller group 1-14. The spraying device 1-9 is set under the upper belt 1-2, and sprays process water and coagulant in a mist form directly to the upper surface of the flat plate, so that the curing reaction of the upper surface of the flat plate is more thorough, and the coagulant further promotes the curing reaction, so that when the flat plate passes through the tertiary pressure roller group 1-14, the upper surface is denser, smooth and free of cracks, so that the flat plate without facing paper can be directly used as an exterior decorative plate.

[0084] Example 3, working process of the finishing mechanism:

[0085] The flat panels that have undergone three-stage continuous forming are transported to the board outlet by the conveying roller group 1-15 and enter the sorting mechanism 4. During the transportation by the roller conveyor device, they are successively passed through the length cutting device to form a flat panel of rated length, and the two sides of the flat panel are cut and trimmed to a flat panel of rated width. After entering the dryer for drying, they are plastic-sealed and stacked.

[0086] The automatic control technology in the present invention is a well-known technology, and the mechanical structure of the tidying mechanism is a well-known technology.

[0087] Advantages: The process of the present invention is complete, water consumption is greatly reduced, and the mechanical device structure is ingenious, especially in the low-water anti-adhesion stirring process and the development of supporting mechanisms, the slurry spreading process and the development of supporting mechanisms, and the three-level continuous molding process and the development of supporting mechanisms, which have achieved subversive innovation in traditional gypsum board production technology.

Claims

1. A dry forming equipment for non-surfaced gypsum board, characterized in that: include: A forming mechanism (1), a spreading mechanism (2), a mixing mechanism (3), and a finishing mechanism (4); the forming mechanism (1), the spreading mechanism (2), and the mixing mechanism (3) are sequentially connected from left to right, and the finishing mechanism (4) is arranged on the left side of the forming mechanism (1) and is connected via a roller conveyor; The forming mechanism (1) comprises: a press frame (1-1), an upper belt (1-2), a driven roller (1-3), a mold belt (1-4), a power device (1-5), a belt cleaning device (1-6), an elastic vibration device (1-7), a guide roller group (1-8), a spray device (1-9), a deviation correction device (1-10), a release agent spraying device (1-11); a first-level pressing roller (1-12), a second-level elastic pressing roller group (1-13), a third-level fixed pressing roller group (1-14), a transmission roller group (1-15), and a support roller (1-16); The press frame (1-1) is a rectangular column structure, the conveying roller group (1-15) is horizontally arranged in the middle of the press frame (1-1), the right part of the conveying roller group (1-15) is the feed end, and the left part is the plate discharge end; upper and lower cantilever beams are respectively arranged at the feed end, the left end of the cantilever beam is installed on the press frame (1-1), and the right end is suspended; two driven rollers (1-3) are vertically arranged and respectively installed on the upper and lower cantilever beams; multiple guide roller groups (1-8) are respectively arranged at the top and bottom of the press frame (1-1); two primary pressing rollers (1-12) are provided and vertically installed on the right column of the press frame (1-1); The power device (1-5) comprises: a forming drive motor (1-5-1), a motor base (1-5-2), a transmission chain plate (1-5-3), and an active roller (1-5-4); two active rollers (1-5-4) are provided and vertically fixedly mounted on the plate outlet end of the press frame (1-1); the motor base (1-5-2) is mounted on the bottom of the press frame (1-1), and the forming drive motor (1-5-1) is fixedly mounted on the motor base, and drives the two active rollers (1-5-4) to rotate synchronously in opposite directions via the transmission chain plate (1-5-3); The mold belt (1-4) is a continuous U-groove rotating belt, and the mold belt (1-4) is tensioned and connected through a lower driven roller, a lower active roller, a lower first-level pressure roller, and a bottom guide roller group; the upper belt (1-2) is a flat belt, and is tensioned and connected through an upper driven roller (1-3), an upper active roller (1-5-4), an upper first-level pressure roller (1-12), and a top guide roller group (1-8); the upper belt (1-2) and the mold belt (1-4) are horizontally laid on the conveying roller group (1-15) in sequence, and the upper belt (1-2) is located in the U-groove of the mold belt (1-4), and the two belts are driven to rotate synchronously by a power device (1-5); A first-stage pressing roller (1-12), a second-stage elastic pressing roller group (1-13), and a third-stage fixed pressing roller group (1-14) are sequentially arranged above the conveying roller group (1-15) at the feed end and the plate discharge end of the press frame (1-1), and are located above the upper belt (1-2). The upper belt (1-2) between the second-stage elastic pressing roller group (1-13) and the third-stage fixed pressing roller group (1-14) is suspended upward by a supporting roller (1-16). A spray device (1-9) is arranged longitudinally in the front and rear directions below the suspended upper belt (1-2). The mixing mechanism (3) is arranged at the paste feeding end on the right side of the forming mechanism (1), and comprises: a feeding port (3-1), a power transmission shaft (3-2), a stirring motor (3-3), a motor support (3-4), a stirring base (3-5), a stirring frame (3-6), a discharge chute (3-7), a stirring barrel (3-8), a water injection device (3-9), a cage shaft (3-10), a lifting bracket (3-11), a cage seat (3-12), a stirring shaft (3-13), and a scraper (3-14); The mixing mechanism (3) is an internally connected double-drum mixing mechanism with two mixing drums (3-8) connected in parallel. A feed port (3-1) is provided at the top of each drum side end, and a discharge port is provided at the bottom of each other end. A discharge chute (3-7) is provided at the lower end of the two discharge ports. The lower end of the discharge chute (3-7) extends into the U-shaped groove on the upper surface of the mold belt (1-4) at the right side of the press frame (1-1). Multiple water injection devices (3-9) are provided on the top of the mixing drum (3-8). Multiple mixing shafts (3-13) are connected in a circumferential manner through fixed frames at both ends to form an integral fixed cage shaft ( 3-10) structure, a central shaft and a power transmission component are respectively set at the center of the fixed frame at both ends of the cage shaft (3-10), two sets of cage shafts (3-10) are arranged in parallel and are respectively located in two mixing drums (3-8), and the central shaft and the power transmission component are located outside the end surfaces of both sides of the mixing drum (3-8), and the two sets of cage shafts (3-10) are meshed and connected with each other through the power transmission component, and the central shafts at both ends of one set of cage shafts (3-10) are simultaneously connected to the two ends of the power transmission shaft (3-2) through the power transmission component; a scraper (3-14) is fixedly installed next to each mixing shaft (3-13); The lower parts of the two mixing drums (3-8) are integrally supported by a cage seat (3-12), and a lifting bracket (3-11) is provided at the lower part of the cage seat; a mixing frame (3-6) is provided on the side of the mixing drum (3-8), a mixing base (3-5) is provided on the upper part of the mixing frame, a motor support (3-4) and a mixing motor (3-3) are provided on the mixing base, and a power transmission shaft (3-2) is connected to the mixing motor (3-3) for driving.

2. The dry forming equipment for non-surfaced gypsum board according to claim 1, characterized in that: The belt cleaning device (1-6), the deviation correcting device (1-10), and the release agent spraying device (1-11) are arranged on the top of the press frame (1-1).

3. The dry forming equipment for non-surfaced gypsum board according to claim 2, characterized in that: The secondary elastic pressure roller group (1-13) includes: a left tensioning wheel (1-13-1), a short-range pressure roller group (1-13-2), a single-joint fixed seat (1-13-3), and a flexible pressure-carrying body (1-13-4); a horizontal short-range pressure roller group (1-13-2) is connected to the lower side of the flexible pressure-carrying body (1-13-4), and a left tensioning wheel (1-13-1) is provided at the lower left corner; a group of single-joint fixed seats (1-13-3) are provided in the left and right directions, and one roller is provided in each group in the front and rear directions, the lower end of which is fixed to the press frame (1-1) and the upper end is fixed to the flexible pressure-carrying body (1-13-4), and the height is adjustable; the elastic vibration device (1-7) is an active excitation device, the upper end of which is installed on the top of the press frame (1-1) and the lower end is connected to the upper left corner of the single-joint fixed seat (1-13-3); The three-stage fixed pressure roller group (1-14) comprises: a long-distance roller group (1-14-1), a double fixed seat (1-14-2), a fixed pressure-bearing body (1-14-3), and a right tensioning wheel (1-14-4); a horizontal long-distance roller group (1-14-1) is connected to the lower side of the fixed pressure-bearing body (1-14-3), and a right tensioning wheel (1-14-4) is provided at the lower right corner; two groups of double fixed seats (1-14-2) are provided in the left and right directions, with one roller provided in each group at the front and rear, the lower end of which is fixed to the press frame (1-1) and the upper end is fixed to the fixed pressure-bearing body (1-14-3), and the height is adjustable.

4. The dry forming equipment for non-surfaced gypsum board according to claim 3, characterized in that: The spreading mechanism (2) is arranged between the flat belt at the slurry feeding end and the U-groove mold belt, and comprises: a fixed seat (2-1), a longitudinal scraper (2-2), a transverse drive motor (2-3), a synchronous pulley (2-4), a transverse guide rail (2-5), a transverse scraper (2-6), and a connecting seat (2-7); The spreading mechanism (2) is fixedly mounted on the lower cantilever beam via fixed seats (2-1) at both ends. The longitudinal scraper (2-2) is a static structure, and the bottom of the longitudinal scraper is set flush with the upper surface of the U-shaped groove of the mold belt (1-4). The transverse scraper (2-6) is a dynamic mechanism, and is mounted on the transverse guide rail (2-5) via a connecting seat (2-7). The transverse drive motor (2-3) drives the transverse guide rail (2-5) via a synchronous pulley (2-4) to drive the transverse scraper (2-6) to move back and forth horizontally, and the bottom of the transverse scraper (2-6) is flush with the upper surface of the U-shaped groove of the mold belt (1-4).

5. The dry forming equipment for non-surfaced gypsum board according to claim 4, characterized in that: The belt cleaning device (1-6) comprises: a cleaning drive motor (1-6-1) and a rotating roller brush (1-6-2); the upper belt (1-2) and the rotating roller brush maintain contact, and the rotating roller brush scrapes and cleans the outer surface of the upper belt (1-2) under the drive of the cleaning drive motor (1-6-1).

6. The dry forming equipment for non-surfaced gypsum board according to claim 5, characterized in that: The deviation-correcting device (1-10) comprises: an adjusting handle (1-10-1), an adjusting screw (1-10-2), and a deviation-correcting roller (1-10-3); the upper belt (1-2) is arranged on the deviation-correcting roller (1-10-3), and the deviation of the upper belt (1-2) is corrected by the adjusting handle (1-10-1) and the adjusting screw (1-10-2), ensuring that the upper belt (1-2) remains directly above the U-shaped groove of the mold belt (1-4).

7. The dry forming equipment for unfaced gypsum board according to claim 6, characterized in that: The finishing mechanism (4) includes a roller conveying device, a length cutting device, a cross-section trimming and cutting device, a drying device, and a plastic sealing and stacking device.

8. The dry forming equipment for unfaced gypsum board according to claim 7, which adopts a dry forming process for unfaced gypsum board, is characterized in that: Step 1, raw material mixing process: setting a mixing mechanism (3) and a spraying device (1-9); by weight, the raw materials supplied to the mixing mechanism (3) and the mixing ratio are: 100 parts of gypsum powder, 20 parts of process water, 0.3 parts of glass fiber, and 0.6 parts of retarder; The raw materials and mixing ratio supplied to the spraying device (1-9) are: 1 part of process water, 0.05 part of coagulant; Step 2, raw material supply process: gypsum powder and glass fiber are respectively transported to the transfer bin of solid raw materials through a metering device, so that the glass fiber is mixed with the gypsum powder; retarder and process water are respectively transported to the transfer water tank of liquid raw materials through a metering device, so that the retarder is pre-placed in the process water in proportion and mixed; solid raw materials and liquid raw materials are continuously supplied to the mixing mechanism (3) in proportion; Step 3, rapid mixing process: two feed ports are provided on the top of the mixing mechanism (3) to continuously receive solid raw materials; multiple water inlets are provided on the top of the mixing mechanism (3) and are connected in parallel to the transfer water tank, so that the process water and retarder mixture are continuously and evenly injected into the mixing mechanism (3) at multiple points inside; Step 4, high-speed stirring process: in the mixing mechanism (3), high-speed stirring is performed to generate a paste, and the stirring process time is set to 10-15 seconds; two discharge ports are set at the bottom of the mixing mechanism (3), and the paste is continuously dropped onto the mold belt (1-4) by gravity, and the dropping time is set to 2-3 seconds; Step 5, slurry spreading process: setting a spreading mechanism (2) to spread the slurry on the mold belt (1-4) evenly so that the height of the slurry is close to twice the rated thickness of the gypsum board; Step 6, three-stage continuous forming process: the first stage adopts a first-stage pressing roller (1-12) for extrusion forming, and the forming thickness is close to 1.5 times the rated thickness of the gypsum board; the second stage adopts a second-stage elastic pressing roller group (1-13) for extrusion forming, and the forming thickness is set to 1.1 times the rated thickness of the gypsum board; the third stage adopts a third-stage fixed pressing roller group (1-14) for pressure holding forming, and the forming thickness is set to the rated thickness of the gypsum board; Step 7: Between the second and third forming processes, a secondary water replenishment process is set up, and a mist of "process water + coagulant" is sprayed onto the upper surface of the gypsum board through the spraying device (1-9); Step 8, finishing process: The pressed and formed continuous length gypsum board is conveyed along the roller conveyor, and is cut to length and trimmed in cross section at the same time. After passing the drying process, it is plastic-sealed and stacked.

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