Cement double-layer edgeless woven bag structure and manufacturing process thereof

Abstract

The present application belongs to the technical field of cement bag, and particularly relates to a cement double-layer edge-seam-free woven bag structure and a manufacturing process thereof. The cement double-layer edge-seam-free woven bag structure comprises an inner-layer edge-seam-free woven bag and an outer-layer edge-seam-free woven bag. The inner side wall of the outer-layer edge-seam-free woven bag is adhered to the outer wall of the inner-layer edge-seam-free woven bag by glue. The bag opening of the inner-layer edge-seam-free woven bag is flush with the bag opening of the outer-layer edge-seam-free woven bag. The bag bottom of the inner-layer edge-seam-free woven bag and the bag bottom of the outer-layer edge-seam-free woven bag are sealed in the same sealing process to realize mutual combination. The present application adopts the inner-outer double-layer woven bag, can form the cement bag structure without edge seam, increases the structural strength and integrity of the cement bag, can realize the continuous woven bag processing of more than 4000m, improves the production efficiency, reduces the labor intensity and investment, guarantees the production efficiency, reduces the production cost, better adapts to the market, and is convenient for mass promotion.

Description

Technical Field

[0001] This invention belongs to the field of cement bag technology, specifically relating to a double-layer seamless woven cement bag structure and its manufacturing process. Background Technology

[0002] Because cement tends to clump when it comes into contact with water, affecting its performance, cement bags are often constructed with a double-layered structure. However, existing cement bags often have seams along their length on the outer bag to cover the inner bag. If seamless woven bags are to be used for the outer bag, they need to be produced manually by individually packaging each woven bag, which requires a large investment of manpower and puts a lot of labor intensity on the workers.

[0003] In addition, cement bags often cannot be prefabricated in advance due to differences in advertising content and specifications. They can only be produced according to orders. This makes it difficult to quickly produce packaging bags by manual assembly when there is an urgent need for large-scale production. It cannot match the urgent production volume, which can easily affect production efficiency and is not adapted to market development.

[0004] Therefore, it is necessary to design a structure and manufacturing process for a double-layer seamless woven cement bag that facilitates the temporary and rapid production of cement bags. Summary of the Invention

[0005] To address the aforementioned problems in existing technologies, this solution provides a double-layer seamless cement woven bag structure and its manufacturing process.

[0006] The technical solution adopted in this invention is as follows:

[0007] A double-layer seamless woven bag structure for cement includes an inner seamless woven bag and an outer seamless woven bag; the inner wall of the outer seamless woven bag and the outer wall of the inner seamless woven bag are bonded together with adhesive; the opening of the inner seamless woven bag is flush with the opening of the outer seamless woven bag; the bottoms of the inner and outer seamless woven bags are sealed in the same bottom-sealing process to achieve a connection; the bottoms of the inner and outer seamless woven bags are sealed in the same sealing process to achieve a connection; the double-layer seamless woven bag structure for cement is a valve bag with a valve opening at one end.

[0008] A manufacturing process for a cement double-layer seamless woven bag structure, used to manufacture the aforementioned cement double-layer seamless woven bag structure, includes the following steps:

[0009] Step A: After drawing out the inner layer of seamless woven bags in the tube shape, lay them all into the groove of the long trough-shaped outer trough frame;

[0010] Step B: After leading out the outer seamless woven bag in the tube shape, attach it to the outside of the outer expansion slot frame from the first end of the outer expansion slot frame, and place the inner seamless woven bag inside the outer seamless woven bag.

[0011] Step C: Simultaneously extend the ends of the inner seamless woven bag and the outer seamless woven bag from the rear end of the outer expansion slot frame to form a double-layer woven bag blank.

[0012] Step D: Cut and seal the bottom of the double-layer woven bag blank to form a cement double-layer seamless woven bag structure.

[0013] As an alternative or supplement to the above scheme: a first-end access machine is provided at the first end of the expansion slot frame. The first-end access machine includes a first support rod, a trapezoidal bracket, a sixth conveyor roller, and a seventh conveyor roller. The sixth conveyor roller is located on the upper part of the trapezoidal bracket and is used for supporting the lower part of the first end of the expansion slot frame. The seventh conveyor roller is vertically located on the upper end of the first support rod and is used for limiting support on the side of the first end of the expansion slot frame.

[0014] A tail-end guide machine is provided at the tail end of the expansion trough frame. The tail-end guide machine includes a second support rod and an eighth conveyor roller. The eighth conveyor roller is vertically installed on the upper end of the second support rod and is used for limiting support on the side of the tail end of the expansion trough frame. Multiple ninth conveyor rollers are arranged side by side in the trough at the tail end of the expansion trough frame. The inner layer of seamless woven bags passes around each of the ninth conveyor rollers and is conveyed to the tail end. A limit block is provided on the inner trough wall at the tail end of the expansion trough frame. The limit block limits the conveying of the inner layer of seamless woven bags.

[0015] As an alternative or supplement to the above solution: the tail end of the outer expansion slot frame is fixed with a gathering mechanism, which includes a guide cylinder, an outer conveying roller, and an inner conveying roller; the guide cylinder is a tube-shaped structure with a flat opening, and the guide cylinder is connected to the slot cavity of the outer expansion slot frame to guide the inner layer of seamless woven bag backward; the inner conveying rollers include two at the top and two at the bottom, and the outer conveying rollers include one at the top and one at the bottom, with the upper outer conveying roller close to the two upper inner conveying rollers, and the lower outer conveying roller close to the two lower inner conveying rollers, so as to limit the front and rear positions of the gathering mechanism and the outer expansion slot frame.

[0016] As an alternative or supplement to the above scheme: a first exhaust assembly is provided behind the outer expansion slot frame. The first exhaust assembly includes two needle rollers, one upper and one lower. The needle rollers are provided with piercing needles on their surfaces to pierce the outer seamless woven bag to achieve exhaust. The lower needle roller and the lower outer conveyor roller are connected to the fourth motor via the second conveyor chain.

[0017] As an alternative or supplement to the above scheme: multiple sets of conveying components for conveying the double-layer woven bag blank are provided behind the first exhaust component, and a pressing component is also provided behind the first exhaust component. The pressing component is located between adjacent conveying components and can press the double-layer woven bag blank into a flat state.

[0018] As an alternative or supplement to the above scheme: a gathering roller is set behind the first exhaust assembly, and the gathering roller is connected to the third motor via the first conveyor chain.

[0019] As an alternative or supplement to the above scheme: a woven bag conveying mechanism is provided in front of the front end of the outer expansion trough frame. The woven bag conveying mechanism includes an initial clamping assembly, which includes a No. 1 base, a No. 1 mounting frame, an adjusting frame, an electric lifting rod, a mounting roller, an inner seamless woven bag, a No. 1 conveying roller, a No. 2 conveying roller, elastic protrusions, and a motor. The mounting roller is installed on the upper end of the adjusting frame and is driven by the motor. The rolled outer or inner seamless woven bag is sleeved on the mounting roller and is pressed against by the elastic protrusions on its surface. The lower end of the adjusting frame is rotatably connected to the No. 1 base, and the middle part of the adjusting frame is rotatably connected to the electric lifting rod. The No. 1 mounting frame is fixed on the No. 1 base, and the No. 1 mounting frame is equipped with a No. 1 conveying roller and a No. 2 conveying roller for conveying the outer seamless woven bag.

[0020] As an alternative or supplement to the above scheme: the woven bag conveying mechanism also includes a tensioning assembly, which includes a second mounting frame and a first motor, a third conveyor roller, a fourth conveyor roller, a fifth conveyor roller, and a first chain mounted on the second mounting frame; the third conveyor roller includes two rollers, one above the other, which work together to clamp the outer seamless woven bag, and the upper third conveyor roller is connected to the first motor via the first chain, while the fourth and fifth conveyor rollers are used for guiding the outer seamless woven bag during conveying.

[0021] As an alternative or supplement to the above solution: an inner layer seamless woven bag laying mechanism is provided above the front end of the outer expansion trough frame. The inner layer seamless woven bag laying mechanism includes a No. 3 mounting frame, a No. 10 conveying roller, a guide roller, and a swing assembly. The swing assembly includes a swing feeding frame, a connecting rod, a transmission wheel set, and a No. 2 motor. The upper part of the swing feeding frame is rotatably connected to the No. 3 mounting frame, and the middle part is rotatably connected through the connecting rod. The swing feeding frame is located below the guide roller. The connecting rod is eccentrically connected to one transmission wheel of the transmission wheel set. The No. 2 motor drives the transmission wheel set and drives the swing feeding frame to swing. The inner layer seamless woven bag passes through the guide roller, the No. 10 conveying roller, and the swing feeding frame in sequence, and is then introduced onto the outer expansion trough frame. The folding and laying of the inner layer seamless woven bag is achieved during the swinging of the swing feeding frame.

[0022] The beneficial effects of this invention are as follows:

[0023] 1. This solution uses double-layered woven bags, which can form a seamless cement bag structure. The seamlessness of the bag body also increases the structural strength and integrity of the cement bag, meeting the actual needs of production and enabling the processing of continuous woven bags of more than 4000m.

[0024] 2. When using the manufacturing process of this solution, the inner and outer seamless woven bags can be automatically fitted together, which effectively improves the production efficiency of cement bags, reduces the intensity of manual labor and labor input, is more suitable for the cement production cycle, and has a higher applicability; it ensures production efficiency, reduces production costs, can better adapt to the market, and is convenient for large-scale promotion and use. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this scheme or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0026] Figure 1 This is a schematic diagram of a double-layer seamless woven bag made of cement.

[0027] Figure 2 This is a flowchart illustrating the manufacturing process of a double-layer seamless cement woven bag structure.

[0028] Figure 3 A side view of a bagging production line for a double-layer seamless woven cement bag structure;

[0029] Figure 4 This is a schematic diagram of the structure of the first-end access unit;

[0030] Figure 5 This is a structural diagram of the gathering mechanism and the tail end guide machine;

[0031] Figure 6 This is a top view of the structure at the rear end of the outward expansion slot frame;

[0032] Figure 7 This is a schematic diagram of the structure behind the external expansion slot frame;

[0033] Figure 8 Structural diagram of the inner layer seamless woven bag laying mechanism;

[0034] Figure 9 This is a schematic diagram of the initial clamping assembly.

[0035] Figure 10 This is a schematic diagram of the tensioning component structure;

[0036] Figure 11 This is a schematic diagram of the structure for installing the rollers;

[0037] Figure 12This is a schematic diagram of a double-layer seamless cement woven bag with a sewn bottom.

[0038] In the diagram: 1-Control console; 2-Inner seamless woven bag laying mechanism; 201-Moving base; 202-Mounting frame No. 3; 203-Transmitting roller No. 10; 204-Oscillating assembly; 205-Oscillating unloading frame; 206-Guide roller; 207-Motor No. 2; 208-Transmission wheel set; 209-Chain No. 2; 210-Linking rod; 3-Woven bag conveying mechanism; 30-Initial clamping assembly; 301-Base No. 1; 302-Mounting frame No. 1; 303 - Adjusting frame; 304 - Electric lifting rod; 305 - Mounting roller; 306 - Outer seamless woven bag; 307 - Conveyor roller No. 1; 308 - Conveyor roller No. 2; 309 - Elastic protrusion; 310 - Electric motor; 31 - Tensioning assembly; 311 - Mounting frame No. 2; 312 - Motor No. 1; 313 - Conveyor roller No. 3; 314 - Conveyor roller No. 4; 315 - Conveyor roller No. 5; 316 - Chain No. 1; 40 - Woven bag fitting assembly; 401 - Head end connection Machine; 402-Tail end inlet machine; 403-Support rod No. 1; 404-Trapezoidal bracket; 405-Transmitter roller No. 6; 406-Transmitter roller No. 7; 41-Outer expansion groove frame; 411-Support rod No. 2; 412-Transmitter roller No. 8; 413-Drive chain; 414-Drive gear; 415-Bevel gear; 416-Vertical steering rod; 417-Transmitter roller No. 9; 418-Limiting block; 5-Gathering mechanism; 501-Mounting frame No. 4; 502-Head assembly Components; 503-No. 1 exhaust assembly; 504-Heating box; 505-Pressure assembly; 506-No. 2 exhaust assembly; 507-Gathering roller; 508-Transfer assembly; 509-Outer transfer roller; 510-Inner transfer roller; 511-Guide cylinder; 512-No. 3 motor; 513-No. 1 transfer chain; 514-No. 4 motor; 515-No. 2 transfer chain; 6-Display screen; 7-Inner layer seamless woven bag; 8-Cutting mechanism; 9-Double-layer woven bag blank. Detailed Implementation

[0039] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are only some embodiments, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments in this solution without creative effort are within the protection scope of this solution.

[0040] Example 1

[0041] like Figure 1 and Figure 3As shown, this embodiment designs a cement double-layer seamless woven bag structure, including an inner seamless woven bag 7 and an outer seamless woven bag 306; the inner wall of the outer seamless woven bag 306 and the outer wall of the inner seamless woven bag 7 are bonded together with adhesive; the opening of the inner seamless woven bag 7 is flush with the opening of the outer seamless woven bag 306; the bottom of the inner seamless woven bag 7 and the bottom of the outer seamless woven bag 306 are sealed in the same bottom sealing process to achieve mutual bonding; the bottom of the inner seamless woven bag and the opening of the outer seamless woven bag are sealed in the same sealing process to achieve mutual bonding; the cement double-layer seamless woven bag structure is a valve bag with a valve opening at one end.

[0042] In the bottom sealing process, existing stitching methods can be used for bottom sealing (such as...). Figure 12 As shown), the bottom can also be sealed by folding and heat sealing (as shown). Figure 2 (as shown); Similarly, the above method can also be used to seal part of the bag opening, thereby producing a valve bag. The above methods are all existing technologies and will not be described in detail here.

[0043] Example 2

[0044] like Figure 2 and Figure 3 As shown, this embodiment designs a manufacturing process for a cement double-layer seamless woven bag structure, which includes the following steps:

[0045] Step A: After the inner seamless woven bag 7 in the tube shape is led out, it is completely laid into the groove of the long trough-shaped outer expansion frame 41;

[0046] Step B: After the outer seamless woven bag 306 in the tube shape is led out, it is connected to the outside of the outer expansion slot frame 41 from the first end of the outer expansion slot frame 41, and the inner seamless woven bag 7 is placed inside the outer seamless woven bag 306.

[0047] Step C: Simultaneously extend the ends of the inner seamless woven bag 7 and the outer seamless woven bag 306 from the rear end of the outer expansion slot frame 41 to form a double-layer woven bag blank 9.

[0048] Step D: Cut and seal the double-layer woven bag blank 9 to form a cement double-layer seamless woven bag structure. The cutting and sealing can be performed using existing cutting mechanism 8 and sealing equipment, which will not be detailed here.

[0049] Example 3

[0050] like Figures 3 to 11As shown, this embodiment designs a bagging production line for cement double-layer woven bags 306 structure to complete steps A, B and C in embodiment 2.

[0051] The action in step C is completed at the woven bag fitting assembly 40, which includes the outer expansion groove frame 41, the head end inlet machine 401, the tail end inlet machine 402, and several rollers for supporting the outer expansion groove frame 41.

[0052] The first end of the expansion slot frame 41 is provided with a first end access machine 401. The first end access machine 401 includes a first support rod 403, a trapezoidal bracket 404, a sixth conveyor roller 405, and a seventh conveyor roller 406. The sixth conveyor roller 405 is located on the upper part of the trapezoidal bracket 404 and is used for supporting the lower part of the first end of the expansion slot frame 41. The seventh conveyor roller 406 is vertically located on the upper end of the first support rod 403 and is used for limiting support on the side of the first end of the expansion slot frame 41.

[0053] A tail end guide machine 402 is provided at the tail end of the expansion slot frame 41. The tail end guide machine 402 includes a second support rod 411 and an eighth conveyor roller 412. The eighth conveyor roller 412 is vertically arranged on the upper end of the second support rod 411 and is used for limiting support on the side of the tail end of the expansion slot frame 41. Multiple ninth conveyor rollers 417 are arranged side by side in the slot at the tail end of the expansion slot frame 41. The inner seamless woven bag 7 passes around each of the ninth conveyor rollers 417 and is conveyed to the tail end. A limit block 418 is provided on the inner slot wall at the tail end of the expansion slot frame 41. The limit block 418 limits the inner seamless woven bag 7 during conveying.

[0054] A connecting frame is provided between the No. 8 conveyor roller 412 and the No. 2 support rod 411. The No. 8 conveyor roller 412 is rotatably connected to the connecting frame, and a threaded rod and a track rod are provided between the connecting frame and the No. 2 support rod 411. The track rod is used to guide the connecting frame and restrict its rotation. One end of the threaded rod is rotatably connected to the connecting frame, and the other end is threadedly connected to the No. 2 support rod 411. A gear is coaxially fixed on the threaded rod. This gear is connected to the drive gear 414 through a transmission chain 413. The drive gear 414 has helical teeth on its side and meshes with a bevel gear 415. A vertical steering rod 416 is coaxially fixedly connected to the bevel gear 415. Rotating the vertical steering rod 416 can control the rotation of the threaded rod, thereby moving the No. 8 conveyor roller 412 closer to or further away from the outer expansion groove frame 41.

[0055] The tail end of the expanding slot frame 41 is fixed with a gathering mechanism 5. The gathering mechanism 5 includes a fourth mounting frame 501 and a guide cylinder 511, an outer conveying roller 509, and an inner conveying roller 510 mounted on the fourth mounting frame 501. The guide cylinder 511 is a tube-shaped structure with a flat end. The guide cylinder 511 communicates with the slot cavity of the expanding slot frame 41 to guide the inner seamless woven bag 7 backward. The inner conveying rollers 510 include two upper ones and two lower ones. The four inner conveying rollers 510 together form the head assembly 502 with corresponding support brackets. The outer conveying rollers 509 include two, one upper and one lower. The upper outer conveying roller 509 is close to the two upper inner conveying rollers 510, and the lower outer conveying roller 509 is close to the two lower inner conveying rollers 510, so as to limit the front and rear positions of the gathering mechanism 5 and the expanding slot frame 41. The upper outer conveying roller 509 can be adjusted vertically. The structure for adjusting is prior art and will not be described in detail here. The two upper outer conveyor rollers 509 abut against the oblique front and oblique rear sides of the upper outer conveyor roller 509, respectively. At the same time, the two lower outer conveyor rollers 509 abut against the oblique front and oblique rear sides of the lower outer conveyor roller 509, respectively, so that the head assembly 502 will not move back and forth with the woven bag.

[0056] A first exhaust assembly 503 is provided behind the outer expansion slot frame 41. The first exhaust assembly 503 includes two needle rollers, one above the other. The needle rollers are provided with piercing needles to pierce the outer seamless woven bag 306 to achieve exhaust. The lower needle roller and the lower outer conveyor roller 509 are connected to the fourth motor 514 through the second conveyor chain 515.

[0057] Behind the first venting assembly 503, multiple conveying assemblies 508 are arranged for conveying the double-layer woven bag blank 9. Behind the first venting assembly 503, a pressing assembly 505 is also arranged. The pressing assembly 505 includes two closely spaced pressing rollers and is positioned between adjacent conveying assemblies 508 to press the double-layer woven bag blank 9 into a flat state. Behind the pressing assembly 505, a second venting assembly 506 is also arranged. The second venting assembly 506 uses two flat-surfaced circular rollers to expel air through compression.

[0058] A gathering roller 507 is located behind the first exhaust assembly 503. The gathering roller 507 is connected to the third motor 512 via the first conveyor chain 513. A heating box 504 is also provided on the side of the fourth mounting bracket 501. The heating box 504 can heat the woven bag to melt the glue on the woven bag, so as to facilitate the adhesion between the two layers of woven bags.

[0059] A woven bag conveying mechanism 3 is provided in front of the front end of the outer expansion slot frame 41. The woven bag conveying mechanism 3 includes an initial clamping assembly 30, which includes a first base 301, a first mounting frame 302, an adjusting frame 303, an electric lifting rod 304, a mounting roller 305, an inner seamless woven bag 7, a first conveying roller 307, a second conveying roller 308, an elastic protrusion 309, and a motor 310. The mounting roller 305 is mounted on the upper end of the adjusting frame 303 and is driven by the motor 310. The outer seamless woven bag 306 or the inner seamless woven bag 7, in a roll shape, is fitted onto the mounting roller 305 and held in place by the elastic protrusions 309 on its surface. The lower end of the adjusting frame 303 is rotatably connected to the first base 301, and the middle part of the adjusting frame 303 is rotatably connected to the electric lifting rod 304. The first mounting frame 302 is fixed on the first base 301, and the first mounting frame 302 is equipped with a first conveyor roller 307 and a second conveyor roller 308 for conveying the outer seamless woven bag 306.

[0060] The woven bag conveying mechanism 3 also includes a tensioning assembly 31, which includes a second mounting frame 311 and a first motor 312, a third conveyor roller 313, a fourth conveyor roller 314, a fifth conveyor roller 315, and a first chain 316 mounted on the second mounting frame 311. The third conveyor roller 313 includes two rollers, one above the other, which work together to clamp the outer seamless woven bag 306. The upper third conveyor roller 313 is connected to the first motor 312 via the first chain 316. The fourth conveyor roller 314 and the fifth conveyor roller 315 are used to guide the outer seamless woven bag 306 during conveying.

[0061] An inner layer seamless woven bag laying mechanism 2 is provided above the front end of the outer expansion slot frame 41. The inner layer seamless woven bag laying mechanism 2 includes a third mounting frame 202, a tenth conveyor roller 203, a guide roller 206, and a swing assembly 204. The swing assembly 204 includes a swing feeding frame 205, a connecting rod 210, a transmission wheel set 208, and a second motor 207. The upper part of the swing feeding frame 205 is rotatably connected to the third mounting frame 202, and the middle part is rotatably connected to the connecting rod 210. The swing feeding frame 205 is set on the guide roller 206. Below; the linkage 210 is eccentrically connected to one of the transmission wheels of the transmission wheel set 208. The second motor 207 is connected to the transmission wheel set 208 and drives the swinging feeding frame 205 to swing. The transmission wheels of the transmission wheel set 208 are driven by the second chain 209 or coaxial shaft. The inner seamless woven bag 7 passes through the guide roller 206, the tenth conveyor roller 203 and the swinging feeding frame 205, and is then introduced onto the outer expansion slot frame 41. During the swinging process of the swinging feeding frame 205, the inner seamless woven bag 7 is folded and laid out. A movable base 201 is installed below the third mounting frame 202. The bottom of the movable base 201 is equipped with rollers for easy movement.

[0062] A control console 1 is installed at the gathering mechanism 5. The control console 1 is connected to the motor and other electrical control components of the bagging production line and is used to control the start and stop of each component and their coordination. The control console 1 can be an industrial computer or a PLC and is connected to a display screen 6 to display parameters and equipment operating status.

[0063] The steps for using the cement double-layer woven bag 306 structure bagging production line in this embodiment are as follows:

[0064] Step 1: Place the rolled inner seamless woven bag 7, whose outer surface is coated with adhesive (weakly tacky before melting, and does not adhere to itself or the outer seamless woven bag 306), onto the mounting roller 305 of the initial clamping assembly 30.

[0065] Step 2: After the end of the inner seamless woven bag 7 is pulled out from the initial clamping component 30, it is fed into the tensioning component 31, and then fed into the inner seamless woven bag laying mechanism 2. It is then fed out through the inner seamless woven bag laying mechanism 2, folded and laid on the outer expansion groove frame 41, and the end of the inner seamless woven bag 7 passes through the faucet component 502.

[0066] After the inner seamless woven bag laying mechanism 2 is started, the inner seamless woven bag 7 swings back and forth and falls under the drive of the swing feeding frame 205, so that the inner seamless woven bag 7 is folded until all the inner seamless woven bags 7 are laid into the cavity of the outer expansion frame 41.

[0067] Step 3: After the inner seamless woven bag 7 is laid out, install the outer seamless woven bag 306 of the same length onto the installation roller 305 of the initial clamping assembly 30.

[0068] Step 5: After the outer seamless woven bag 306 is passed through the woven bag conveying mechanism 3 and fitted onto the outside of the outer expansion slot frame 41, the inner seamless woven bag 7 is wrapped inside the outer seamless woven bag 306. When the end of the outer seamless woven bag 306 is pulled to the faucet assembly 502, the outer seamless woven bag 306 and the inner seamless woven bag 7 are sewn together at the end to form the initial end of the double-layer woven bag blank 9.

[0069] Step six: After the initial end passes through the gathering mechanism 5, the first venting assembly 503, the pressing assembly 505, the second venting assembly 506, etc., it is clamped on the conveying assembly 508, and the double-layer woven bag blank 9 is wound up at the gathering roller 507, completing the production of a batch of double-layer woven bag blanks 9. Repeating steps one to six above, and sewing the subsequent double-layer woven bag blank 9 with the previous double-layer woven bag blank 9, enables continuous production of double-layer woven bag blanks 9.

[0070] In the above steps, when the initial production line is started, binding ropes can be set at the ends of the inner layer seamless woven bags or the outer layer seamless woven bags of the initial batch, and the inner layer seamless woven bags 7 and the outer layer seamless woven bags 306 can be guided and pulled by the binding ropes.

[0071] Compared with the prior art, the structure in this embodiment does not require cutting. It can directly put on the inner film of the plastic bag and can put on a batch of woven bags in one roll. It can directly produce, for example, rolls of 4,800 meters of material, with higher production efficiency.

[0072] The above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation; it is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom remain within the scope of this technology.

Claims

1. A double-layer seamless woven bag structure for cement, characterized in that: The bag includes an inner seamless woven bag (7) and an outer seamless woven bag (306); the inner wall of the outer seamless woven bag (306) and the outer wall of the inner seamless woven bag (7) are bonded together with glue; the opening of the inner seamless woven bag (7) is flush with the opening of the outer seamless woven bag (306); the bottom of the inner seamless woven bag (7) and the bottom of the outer seamless woven bag (306) are sealed in the same bottom sealing process to achieve mutual bonding; the bottom of the inner seamless woven bag (7) and the opening of the outer seamless woven bag (306) are sealed in the same sealing process to achieve mutual bonding; the cement double-layer seamless woven bag structure is a valve bag with a valve opening at one end.

2. A manufacturing process for a cement double-layer seamless woven bag structure, used to manufacture the cement double-layer seamless woven bag structure as described in claim 1, characterized in that: Includes the following steps: Step A: After the inner seamless woven bag (7) in the tube shape is led out, it is completely laid into the groove of the long groove-shaped outer expansion frame (41); Step B: After the outer seamless woven bag (306) in the tube shape is led out, it is attached to the outside of the outer expansion slot frame (41) from the first end, and the inner seamless woven bag (7) is placed inside the outer seamless woven bag (306). Step C: Simultaneously draw out the ends of the inner seamless woven bag (7) and the outer seamless woven bag (306) from the rear end of the outer expansion slot frame (41) to form a double-layer woven bag blank (9); Step D: Cut and seal the bottom of the double-layer woven bag blank (9) to form a cement double-layer seamless woven bag structure.

3. The manufacturing process of the cement double-layer seamless woven bag structure according to claim 2, characterized in that: The first end of the expansion slot frame (41) is provided with a first end access machine (401). The first end access machine (401) includes a first support rod (403), a trapezoidal bracket (404), a sixth conveyor roller (405), and a seventh conveyor roller (406). The sixth conveyor roller (405) is located on the upper part of the trapezoidal bracket (404) and is used for supporting the lower part of the first end of the expansion slot frame (41). The seventh conveyor roller (406) is vertically located on the upper end of the first support rod (403) and is used for limiting support on the side of the first end of the expansion slot frame (41). A tail end guide machine (402) is provided at the tail end of the expansion groove frame (41). The tail end guide machine (402) includes a second support rod (411) and an eighth conveyor roller (412). The eighth conveyor roller (412) is vertically arranged at the upper end of the second support rod (411) and is used for limiting support on the side of the tail end of the expansion groove frame (41). Multiple ninth conveyor rollers (417) are arranged side by side in the groove at the tail end of the expansion groove frame (41). The inner seamless woven bag (7) passes around each of the ninth conveyor rollers (417) and is conveyed to the tail end. A limit block (418) is provided on the inner groove wall at the tail end of the expansion groove frame (41). The limit block (418) limits the inner seamless woven bag (7) during conveying.

4. The manufacturing process of the cement double-layer seamless woven bag structure according to claim 2, characterized in that: The tail end of the outer expansion slot frame (41) is fixed with a gathering mechanism (5). The gathering mechanism (5) includes a guide cylinder (511), an outer conveying roller (509), and an inner conveying roller (510). The guide cylinder (511) is a tube-shaped structure with a flat opening. The guide cylinder (511) is connected to the slot cavity of the outer expansion slot frame (41) to guide the inner layer of seamless woven bag (7) backward. The inner conveying roller (510) includes two upper ones and two lower ones. The outer conveying roller (509) includes two upper ones and two lower ones. The upper outer conveying roller (509) is close to the two upper inner conveying rollers (510), and the lower outer conveying roller (509) is close to the two lower inner conveying rollers (510) to limit the front and rear positions of the gathering mechanism (5) and the outer expansion slot frame (41).

5. The manufacturing process of the cement double-layer seamless woven bag structure according to claim 4, characterized in that: A first exhaust assembly (503) is provided behind the outer expansion slot frame (41). The first exhaust assembly (503) includes two needle rollers, one above the other. The needle rollers are provided with piercing needles to pierce the outer seamless woven bag (306) to achieve exhaust. The lower needle roller and the lower outer conveyor roller (509) are connected to the fourth motor (514) through the second conveyor chain (515).

6. The manufacturing process of the cement double-layer seamless woven bag structure according to claim 5, characterized in that: Multiple sets of conveying components (508) for conveying the double-layer woven bag blank (9) are provided behind the first exhaust component (503). A pressing component (505) is also provided behind the first exhaust component (503). The pressing component (505) is located between adjacent conveying components (508) and can press the double-layer woven bag blank (9) into a flat state.

7. The manufacturing process of the cement double-layer seamless woven bag structure according to claim 5, characterized in that: A gathering roller (507) is provided behind the first exhaust assembly (503), and the gathering roller (507) is connected to the third motor (512) via the first transmission chain (513).

8. The manufacturing process of the cement double-layer seamless woven bag structure according to any one of claims 1-7, characterized in that: A woven bag conveying mechanism (3) is provided in front of the front end of the outer expansion slot frame (41). The woven bag conveying mechanism (3) includes an initial clamping assembly (30), which includes a first base (301), a first mounting frame (302), an adjusting frame (303), an electric lifting rod (304), an installation roller (305), an inner seamless woven bag (7), a first conveying roller (307), a second conveying roller (308), an elastic protrusion (309), and a motor (310). The installation roller (305) is mounted on the upper end of the adjusting frame (303) and powered by the motor (310). The outer seamless woven bag (306) or the inner seamless woven bag (7) is rolled up and placed on the mounting roller (305) and pressed against by the elastic protrusions (309) on its surface. The lower end of the adjusting frame (303) is rotatably connected to the first base (301), and the middle part of the adjusting frame (303) is rotatably connected to the electric lifting rod (304). The first mounting frame (302) is fixed on the first base (301), and the first mounting frame (302) is equipped with a first conveyor roller (307) and a second conveyor roller (308) for conveying the outer seamless woven bag (306).

9. The manufacturing process of the cement double-layer seamless woven bag structure according to claim 8, characterized in that: The woven bag conveying mechanism (3) also includes a tensioning assembly (31), which includes a second mounting frame (311) and a first motor (312), a third conveyor roller (313), a fourth conveyor roller (314), a fifth conveyor roller (315), and a first chain (316) mounted on the second mounting frame (311). The third conveyor roller (313) includes two rollers, one above the other, which work together to clamp the outer seamless woven bag (306). The upper third conveyor roller (313) is connected to the first motor (312) via the first chain (316). The fourth conveyor roller (314) and the fifth conveyor roller (315) are used to guide the outer seamless woven bag (306) during conveying.

10. The manufacturing process of the cement double-layer seamless woven bag structure according to claim 9, characterized in that: An inner layer seamless woven bag laying mechanism (2) is provided above the front end of the outer expansion slot frame (41). The inner layer seamless woven bag laying mechanism (2) includes a third mounting frame (202), a tenth conveyor roller (203), a guide roller (206), and a swing assembly (204). The swing assembly (204) includes a swing feeding frame (205), a connecting rod (210), a transmission wheel set (208), and a second motor (207). The upper part of the swing feeding frame (205) is rotatably connected to the third mounting frame (202), and the middle part is rotatably connected through the connecting rod (210). The swing feeding frame (205) is set below the guide roller (206); the connecting rod (210) is eccentrically connected to one of the transmission wheels of the transmission wheel set (208), and the second motor (207) is connected to the transmission wheel set (208) and drives the swing feeding frame (205) to swing; the inner layer seamless woven bag (7) passes through the guide roller (206), the tenth conveyor roller (203) and the swing feeding frame (205) in succession, and is then introduced into the outer expansion groove frame (41), and the inner layer seamless woven bag (7) is folded and laid out during the swing of the swing feeding frame (205).

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