Gas cylinder rubber cup lower glue filling production method based on binary package

Abstract

The invention relates to gas cylinder glue, in particular to a binary package-based gas cylinder glue cup lower glue filling production method, which comprises the following steps of: after a bag assembly is arranged in a positive pressure bottle, fixing a bag joint by using a clamping mechanism, inserting a feeding nozzle of a glue filling device into the bag joint, and stopping filling after quantitative materials are filled into the bag; and then the glue outlet valve assembly and the bag connector are assembled, then the glue outlet valve assembly and the positive pressure bottle are subjected to cover sealing treatment, and pressurization treatment on the positive pressure bottle is completed in the cover sealing treatment process. According to the under-cup glue filling production method provided by the scheme, operation procedures such as material filling, positive pressure bottle pressurization and cover sealing are completed on the upper opening of the positive pressure bottle, compared with an existing production scheme, the production efficiency can be remarkably improved, a series of problems existing in existing on-valve filling are solved, and the production cost is reduced. And high-pressure air is injected into the positive-pressure bottle while the positive-pressure bottle is sealed, so that high structural compressive strength of the positive-pressure bottle can be ensured, and potential safety hazards existing during use or transportation of the positive-pressure bottle can be eliminated.

Description

Technical Field

[0001] The invention relates to gas cylinder glue, in particular to a production method for filling glue under a gas cylinder glue cup based on binary packaging. Background Art

[0002] Gas cylinder glue is a device that places a binary packaging bag containing colloid in a positive pressure bottle and relies on air pressure to achieve automatic glue discharge. At present, the characteristics of similar products in the industry are that a piston is set in the positive pressure bottle, and the piston divides the internal space of the positive pressure bottle into an upper material chamber and a lower pressure chamber. During production, the installation of the glue discharge valve assembly is completed first, and then the colloid is added to the material chamber through the valve core channel of the glue discharge valve assembly, and then the fluorine-containing gas or liquefied petroleum gas is injected into the pressure chamber through the pressure hole. This method of reverse glue filling through the glue discharge valve assembly has many problems. For example, the patent with publication number CN212333469U discloses a self-spraying glue bottle, which has a filling port at the bottom of the glue bottle body and a built-in pressure unit. First, the structural strength of the glue bottle body of this structure is insufficient, and the internal air pressure cannot meet the extrusion of objects with higher viscosity. In addition, the needle valve unit used in it has weak sealing connection with the capsule unit, and it is difficult to meet the secondary use requirements after the first opening.

[0003] The obvious drawbacks of the above technology are:

[0004] ① First, glue is poured into the bag through the outer port of the valve core of the glue bottle. Due to the small aperture of the valve core, this glue pouring method is inefficient overall, and the air inside the bag is not easy to discharge. It may cause some glue to be affected by the residual air in the bag during storage, resulting in unnecessary reactions, and even oxidation / aging / cross-linking / curing of the material, reducing product quality. In addition, for colloids with high viscosity, glue pouring from the valve core to the inside often causes blockage;

[0005] ② Before filling, the bag is already in a closed space. Filling the bag through the valve core requires overcoming all the pressure of the bag, which increases the difficulty of filling;

[0006] ③It is necessary to drill a hole at the bottom of the positive pressure bottle, which reduces the pressure resistance of the positive pressure bottle;

[0007] ④ The overall structure of this gas cylinder glue is complex, the manufacturing precision requirements are high, and the production and processing are difficult;

[0008] ⑤ The pressure filling material inside the positive pressure bottle of similar products in the industry is fluorine-containing gas or liquefied petroleum gas. When the product is used, the internal pressure filling material gradually vaporizes and absorbs a large amount of heat, and there are risks in storage and transportation. Summary of the invention

[0009] The purpose of the present invention is to provide a production method for filling glue under the rubber cup of a gas cylinder based on dual packaging, so as to solve the problems raised in the above-mentioned background technology.

[0010] To achieve the above object, the present invention provides the following technical solution: a production method for filling glue in a gas cylinder rubber cup based on dual packaging, characterized in that it comprises the following steps:

[0011] S1: inserting the lower part of the bag connector into the bag from the bag opening, and then sealing and fixing the bag opening and the bag connector to form a bag assembly;

[0012] S2: Rolling the bag assembly, and then placing the main body of the bag in a positive pressure bottle;

[0013] S3: First, place the positive pressure bottle upright on the holding fixture, keep the bladder bag connector exposed from the bottle mouth of the positive pressure bottle, and then clamp the bladder bag connector on the clamping mechanism of the holding fixture;

[0014] S4: inserting the feed nozzle of the glue injection device into the bag joint;

[0015] S5: After adding a predetermined amount of material into the bag, stop filling;

[0016] S6: Install the valve body of the dispensing valve assembly into the bag joint from top to bottom, and complete the fixed installation of the dispensing valve assembly and the bag joint;

[0017] S7: withdraw the holding fixture that fixes the bag joint;

[0018] S8: performing pressurized capping processing on the dispensing valve assembly and the positive pressure bottle, completing the sealing assembly of the dispensing valve assembly and the positive pressure bottle, and at this time the positive pressure bottle is in a positive pressure state;

[0019] S9: Install the discharge gun head assembly on the glue discharge valve.

[0020] In the above technical scheme, the bag assembly is first loaded into the positive pressure bottle, and then the material is added to the bag through the bag joint, followed by subsequent pressurization, capping and other processes. Since the aperture of the bag joint is larger than the aperture of the valve core, the material can be effectively prevented from being blocked when adding the material, thereby improving the filling efficiency. In addition, the pressurization process of the positive pressure bottle and the installation process of the glue discharging valve assembly in this scheme are carried out sequentially, and there is no need to independently open a pressurization hole on the positive pressure bottle, thereby ensuring the original structural strength of the packaging, simplifying the internal structure of the packaging, and discarding moving parts such as the piston. In the under-cup glue filling production method provided by this scheme, the material filling, positive pressure bottle pressurization, capping and other operating processes are all completed above the bottle mouth of the positive pressure bottle. Compared with the existing production scheme, the present invention can significantly improve production efficiency and solve a series of problems existing in the existing valve filling. In addition, the present invention injects high-pressure air into the positive pressure bottle, and using air as a high-pressure gas source can reduce gas costs, while also eliminating the potential safety hazards of the positive pressure bottle when it is in use or transported.

[0021] As a preferred solution, in step S6, before the valve body of the glue dispensing valve assembly is installed into the bag joint, a support mechanism is inserted into the bag through the bag joint, and the support mechanism forms an inner channel extending downward to the bottom of the bag in the bag, and the inner channel is connected to the bag joint. When the existing gas cylinder glue is used, the inner wall of the bag will partially fit under a positive pressure environment, and part of the material will be isolated at this time. Under the action of the support mechanism, this part of the isolated material can still enter the bag joint through the inner channel, thereby avoiding the situation where glue cannot be discharged, which is conducive to reducing material loss.

[0022] As a preferred solution, in step S5, before injecting the material, a negative pressure generating device is used to perform negative pressure pretreatment on the chamber of the bag. The bag treated with negative pressure is conducive to smooth filling of the material.

[0023] As a preferred solution, the bag joint is a tubular structure with a connecting channel, the upper part of which is provided with a clamping part cooperating with a clamping mechanism, and the lower part is a connecting part inserted into the bag. In step S1, the connecting part is sealed and fixedly connected to the bag mouth. In step S3, the clamping mechanism clamps the clamping part of the bag joint. The part of the connecting channel located at the upper part of the bag joint is used as an assembly part and is installed on the valve body of the glue discharging valve assembly. The assembly part includes a fastening section, and a fastening assembly part is correspondingly provided on the valve body. In step S6, the fastening section and the fastening assembly part can be fixedly connected by plug connection, threaded connection or welding connection to achieve a fastening connection between the bag joint and the valve body. The clamping part provided on the bag joint can enable the clamping mechanism to stably clamp the bag joint, so that the bag joint and the feed nozzle of the glue injection device are in stable contact, thereby ensuring that the bag joint will not be separated from the feed nozzle during the under-cup filling process. In addition, fixing the bag joint by the clamping part also helps the subsequent precise assembly of the bag joint and the glue discharging valve assembly.

[0024] As a preferred solution, in step 6, when the bladder joint and the valve body are connected by plug connection or threaded connection, the assembly part further includes a sealing section, which is tightly fitted with a sealing ring I provided on the valve body. When the bladder joint and the valve body are connected by plug connection or threaded connection, there may be a gap between the bladder joint and the valve body, and adding a sealing ring I between the two can ensure the sealing after the connection.

[0025] As a preferred embodiment, the valve body includes a valve body and a valve core, wherein a sealing top cover is arranged on the upper part of the valve body, and in step S8, a pressurized sealing device is used to squeeze the sealing top cover so that it is buckled with the edge of the bottle mouth of the positive pressure bottle; the lower part of the valve core is installed in the valve chamber inside the valve body, and the upper part passes through the valve body and is located outside the positive pressure bottle, and a reset spring is arranged in the valve chamber; the valve core has a glue flow channel with an open top, and a glue inlet hole connected to the glue flow channel is arranged at the lower part, and pressing downward can make the valve core move downward to the glue inlet hole to connect with the connecting channel, and under the action of the reset spring, the valve core can automatically reset and cut off the connection between the glue inlet hole and the connecting channel. Preferably, an independently installed lower limit seat is provided at the lower part of the valve body, and the reset spring is sleeved on the outer periphery of the valve core, and its lower end touches the upper edge of the lower limit seat, and the upper end touches the limit edge provided on the outer periphery of the valve core; before performing step S6, the valve body needs to be assembled first: first, the valve core is inserted into the valve chamber of the valve body from bottom to top, and then the reset spring is sleeved on the valve core, and then the lower limit seat is sleeved on the valve core, and finally the lower limit seat is fixedly assembled with the valve body. Placing the reset spring on the outer periphery of the valve core can isolate the reset spring from the material, which can prevent the material from adhering and affecting the performance of the valve, and reduce the risk of the material reacting with the reset spring of certain materials (such as certain metal springs), thereby ensuring the efficiency of the material; the independently provided lower limit seat facilitates the assembly of the valve core and the reset spring, and at the same time guides the valve core.

[0026] As a preferred solution, the glue inlet hole is located on the side of the lower part of the valve core, and the outer wall of the lower part of the valve core fits the inner wall of the lower limit seat; an upper sealing ring and a lower sealing ring are respectively arranged on the valve core below and above the glue inlet hole, wherein the upper sealing ring always fits tightly against the inner wall of the lower limit seat, and when the valve core is reset, the lower sealing ring fits tightly against the inner wall of the lower limit seat. When the lower end of the valve core extends out of the lower limit seat, the material in the bag enters the glue inlet hole through the connecting channel, and then flows out from the glue flow channel. At this time, the upper sealing ring and the lower limit seat remain in a sealed state, which neither allows air to contact the material in the bag nor prevents the material from entering the valve chamber. When the valve core is reset, the lower sealing ring and the lower limit seat remain in a sealed state, which can prevent the material from leaking and entering the glue inlet hole.

[0027] As a preferred solution, the discharge gun head assembly includes a gun seat, a pressing handle and a glue discharge gun barrel; the gun seat is installed on the upper part of the glue discharge valve assembly, the glue discharge gun barrel is sleeved on the upper end of the valve core, and a pressure mechanism is arranged on the side of the glue discharge gun barrel; the pressing handle is a lever mechanism, and its front end is movably mounted on the gun seat. In step S9, after the gun seat and the glue discharge gun barrel are installed, the pressing handle is folded backward until the glue discharge gun barrel passes through the avoidance opening arranged in the middle of the pressing handle, and at this time, the pressure mechanism on the glue discharge gun barrel touches the contact part arranged on the back of the pressing handle. When the pressing handle is pressed down, the contact part presses the pressure mechanism downward, thereby pushing the valve core to move downward, thereby realizing automatic glue discharge.

[0028] As a preferred solution, a limit opening is provided on the gun mount, and a limit head inserted into the limit opening is correspondingly provided on the pressing handle. In step S9, after the pressing handle is folded backward, the limit head on the pressing handle is inserted into the limit opening, thereby limiting the movable range of the pressing handle through the cooperation between the limit opening and the limit head. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0030] Figure 1 A schematic diagram of the process flow of the method for producing a gas cylinder rubber cup with glue provided by the present invention;

[0031] Figure 2 It is a schematic diagram of the structure of the support spring in the bladder bag;

[0032] Figure 3 A schematic diagram of the planar structure of a holding fixture used in the under-cup glue pouring production method;

[0033] Figure 4 It is a schematic diagram of the partial cross-section structure of the gas cylinder glue in step S9;

[0034] Figure 5 It is a schematic diagram of the cross-section structure of the bag connector and the dispensing valve assembly assembled using a flat plug structure;

[0035] Figure 6 It is a schematic diagram of the longitudinal section structure of the glue dispensing valve assembly;

[0036] Figure 7 It is a schematic diagram of the overall structure of the discharge gun head assembly;

[0037] Figure 8 It is a schematic diagram of the cutaway structure of the discharge gun head assembly;

[0038] Fig. 9 It is a structural schematic diagram of assembling the bag joint and the glue discharging valve assembly using a threaded structure;

[0039] Fig.10 This is a schematic diagram of the structure of assembling the bag joint and the glue discharge valve assembly by welding.

[0040] In the figure, positive pressure bottle 1, discharge gun head assembly 2, glue discharging valve assembly 3, bag assembly 4, holding fixture 5, bag joint 41, bag 42, support spring 43, lifting platform 51, cylinder 52, slide rail 53, back plate 54, clamping mechanism 55, gun seat 211, buckling edge 212, pressing handle 213, installation shaft 214, limit head 215, limit port 216, avoidance port 217, glue discharging gun barrel 218, glue discharging gun nozzle 219, positioning hole 220, valve body 301, sealing top cover 302, valve core 303, flange 304, plug section 305, flange I306, sealing groove 307, sealing ring I 308, valve chamber 309, lower limit seat 310, limit edge 311, return spring 312, glue inlet hole 313, upper sealing ring 314, lower sealing ring 315, valve mouth sealing ring 316, top cover sealing ring 317, threaded section I 318, connecting channel 411, plug-in section I 412, plug-in section I I 413, plug-in section II I 414, flange I I 415, annular groove 416, threaded section I I 417. DETAILED DESCRIPTION

[0041] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0042] Figure 1 The process flow chart of the production method of the bottom glue filling of the gas cylinder rubber cup based on the dual packaging of the present invention, in this production method, the components used include a positive pressure bottle 1 with an open top, a discharge gun head assembly 2, a glue discharge valve assembly 3 and a bladder assembly 4 composed of a bladder joint 41, a bladder 42 and a support spring 43. The mouth of the positive pressure bottle 1 is closed, and its diameter is smaller than the inner cavity diameter of the positive pressure bottle 1. Since the diameter of the bladder is larger than the diameter of the mouth of the positive pressure bottle 1 after the bladder is filled with materials, the bladder needs to be put into the bottle first during the production process. Specifically, the production method includes the following steps:

[0043] Step S1: inserting the lower part of the bag joint into the bag from the bag opening, and then sealing and fixing the bag opening and the bag joint to form a bag assembly; the bag opening and the bag joint can be sealed and connected by welding or adhesive;

[0044] S2: The diameter of the mouth of the positive pressure bottle 1 is smaller than the inner diameter of the bottle body. This step requires rolling the bag assembly 4. The specific operation is to roll or fold the edge of the bag 42 to reduce its width so that it can pass through the mouth of the positive pressure bottle 1 smoothly, and then insert it into the positive pressure bottle 1. This step can be manually operated or automated using special equipment;

[0045] S3: This step requires the use of Figure 3The holding fixture 5 shown is used to fix the bag connector 41. First, the positive pressure bottle is placed upright on the lifting platform 51 of the holding fixture 5, and the bag connector 41 is kept exposed from the bottle mouth of the positive pressure bottle 1. Then, the bag connector 41 is clamped on the clamping mechanism 55 on the upper part of the lifting platform; Figure 3 As shown, the left side of the lifting platform 51 has a longitudinally arranged back plate 54, the clamping mechanism 55 is arranged on the top of the back plate 54, and the entire lifting platform is movably installed through a slide rail 53. In addition, the holding fixture 5 has a cylinder 52 for controlling the longitudinal movement of the lifting platform 51, and the positive pressure bottle and other structures can be moved upward or downward by controlling the cylinder 52;

[0046] S4: Start the cylinder 52 of the holding fixture to raise the lifting platform 51 until the feed nozzle of the glue injection device above is inserted into the bag joint 41. At this time, it is necessary to ensure that the feed nozzle and the bag joint are in sealed contact;

[0047] S5: Before injecting the material, a negative pressure generating device is used to pre-treat the chamber of the bag with negative pressure to prevent the internal air pressure from hindering the entry of the material, and then a predetermined amount of material (colloid) is added into the bag; after the material is added, the bag 42 expands to fill most of the space of the positive pressure bottle 1. Since the diameter of the bag is larger than the diameter of the top opening of the positive pressure bottle and the bag is in an expanded state, the bag 42 will not fall off the positive pressure bottle;

[0048] S6: Control the lifting platform 51 to separate the bag joint from the glue injection device, and then insert a support spring 43 into the bag through the bag joint 41, the lower end of the support spring 43 extends downward to the bottom of the bag, and the upper end is located at the bag joint 41, such as Figure 2 As shown, based on the structure of the spring itself, an inner channel is formed in the middle to ensure that materials at all places of the bag can enter the bag joint 41 through the inner channel; then the valve body of the glue discharging valve assembly 3 is installed into the bag joint 41 from top to bottom, and the glue discharging valve assembly and the bag joint are fixedly installed. The bag joint and the glue discharging valve assembly used in this embodiment are connected by plug-in connection, that is, the valve body is coaxially inserted into the bag joint 41. After being plugged in place, the valve body and the bag joint are fixed and sealed; the support spring 43 used in this embodiment is used as a support mechanism inside the bag, and its function is to prevent the bag inner wall from sticking locally and isolating part of the material. In addition to the support spring 43, other structures can also be used, such as a tubular structure with a series of through holes opened on the circumference;

[0049] S7: After the assembly of the bag connector 41 and the dispensing valve assembly 3 is completed, the bag connector is removed from the clamping mechanism and transferred to the pressurized capping device;

[0050] S8: The positive pressure bottle 1 is pressurized and capped to complete the sealing assembly of the glue discharge valve assembly 3 and the positive pressure bottle 1, and the positive pressure bottle 1 is now in a positive pressure state; in this embodiment, air is injected into the positive pressure bottle during the pressurization process, and the air is used as a high-pressure gas source, which can not only reduce the gas cost, but also eliminate the safety hazards of the positive pressure bottle when it is in use or transported.

[0051] S9: Install the discharge gun head assembly 2 on the glue discharge valve 3 to obtain Figure 4 Gas cylinder glue shown.

[0052] Compared with the existing production process, the most important feature of the under-cup glue filling production method provided by the present invention is to directly fill the material into the bag 42 through the bag joint 41, and then assemble the bag joint 41 with the glue discharging valve assembly 3, which can eliminate the slow material filling and valve core blockage in the reverse filling (or valve canning) process of the glue discharging valve assembly. In addition, when the glue discharging valve assembly 3 and the positive pressure bottle 1 are sealed, high-pressure air is injected into the positive pressure bottle 1 through the positive pressure bottle mouth to put the bag 42 in a positive pressure environment. Therefore, the pressurization process of the positive pressure bottle in this solution is carried out together with the installation process of the glue discharging valve assembly, and there is no need to independently open a pressurization hole at the bottom of the positive pressure bottle 1, which ensures the original structural strength of the positive pressure bottle 1, simplifies the internal structure of the positive pressure bottle 1, and discards the movable parts such as the piston in the prior art. In the method for filling glue under the cup provided by this solution, the material filling, positive pressure bottle pressurization, capping and other operation processes are all completed at the upper mouth of the positive pressure bottle. Compared with the existing production scheme, the present invention can significantly improve the production efficiency and solve a series of problems existing in the reverse filling on the existing valve. In addition, the pressure filler inside the positive pressure bottle of similar products in the industry is fluorine-containing gas or liquefied petroleum gas. When the product is used, the internal pressure filler gradually vaporizes and absorbs a large amount of heat, and there are risks in storage and transportation. The present invention injects high-pressure air into the positive pressure bottle, which can not only eliminate the safety hazards of the positive pressure bottle when it is used or transported, but also has low cost, energy saving and environmental protection.

[0053] Figure 5-7 The schematic diagram of the structure of the bag joint 41, the discharging valve assembly 3 and the discharging gun head assembly 2 used in the present under-cup glue filling production method is shown. Figure 5 As shown, the lower part of the bag connector 41 is a connecting part inserted into the bag 42. In step S1, the connecting part and the bag mouth are fused and fixed by welding process. Two circles of flanges 1 I415 are arranged on the outer periphery of the upper part of the bag connector 41, and an annular groove 416 is formed between the two circles of flanges 1 I415. The flanges 1 I415 and the annular groove 41 together serve as a clamping part. In step S3, the clamping mechanism 55 clamps the clamping part of the bag connector 41 to fix the bag connector 41.

[0054] The bag connector 41 is a tubular structure with a connecting channel 411. A section of the connecting channel 411 at the upper part of the bag connector 41 serves as an assembly portion, and the entire bag assembly 4 is mounted on the valve body of the dispensing valve assembly 3 through the assembly portion. In this embodiment, the bag connector 41 and the valve body are assembled by plugging. Therefore, in step 6, the fixed assembly and sealing of the two can be completed by coaxially inserting the valve body into the assembly portion at the upper part of the bag connector 41.

[0055] Regarding the above-mentioned plug-in method, the assembly portion includes a lower fastening section and an upper sealing section, wherein the fastening section is installed in cooperation with the fastening assembly portion provided on the valve body, and the sealing section is in close contact with the sealing ring I 308 sleeved on the valve body. Specifically, as Figure 5 As shown, the entire assembly portion is divided into a plug-in section I412, a plug-in section II I413 and a plug-in section II I414 from top to bottom, wherein the plug-in section I412 serves as a sealing section, and its diameter is larger than the diameter of the plug-in section II I414, and the diameter of the plug-in section II I414 is larger than the diameter of the plug-in section I I413; correspondingly, two circles of flanges I 306 are arranged on the outer periphery of the valve body 301 of the valve body used, sealing grooves 307 are formed between the flanges I306 and sealing rings I 308 are installed, the plug-in section 305 is located below the flanges I 306, and the flange 304 is arranged below the plug-in section 305. In the assembled state, the inner wall of the plug-in section I412 fits against the flange I 306 and is sealed by the sealing ring I 308 to ensure that high-pressure gas does not enter the interior of the bladder 42; the plug-in section II I414 engages with the flange 304, and the upper edge of the plug-in section I I413 touches the flange I 306 below, and the inner wall of the plug-in section I I413 fits against the inner wall of the plug-in section 305. This flat-insertion installation structure is convenient for quick assembly, and after assembly, the bladder joint 41 will be close to the valve body due to deformation recovery, has good airtightness, and can ensure that the bladder joint 41 and the valve body 301 maintain a stable installation state.

[0056] like Figure 6As shown, the valve body used includes a valve body 301 and a valve core 303, wherein a sealing top cover 302 is arranged on the upper part of the valve body 301. In step S8, a pressurized sealing device is used to squeeze the sealing top cover 302 so that it is buckled with the edge of the bottle mouth of the positive pressure bottle. To ensure airtightness, a sealing gasket is arranged between the bottle mouth of the positive pressure bottle and the sealing top cover 302 before squeezing; the lower part of the valve core 303 is installed in the valve chamber 309 inside the valve body 301, and the upper part passes through the valve body 301 and is located outside the positive pressure bottle 1, and a return spring 312 is arranged in the valve chamber 309; in this embodiment, for ease of assembly, the valve body 30 1 An independently installed lower limit seat 310 is provided at the lower part. To prevent the material from contacting the reset spring 312, the reset spring 312 is sleeved on the outer periphery of the valve core 303, and its lower end touches the upper edge of the lower limit seat 310, and the upper end touches the limit edge 311 provided on the outer periphery of the valve core 303; before performing step S6, the valve body needs to be assembled first: first, the valve core 303 is inserted from bottom to top into the valve chamber 309 of the valve body 301, and then the reset spring 312 is sleeved on the valve core 303, and then the lower limit seat 310 is sleeved on the valve core 303, and finally the lower limit seat 310 is fixedly assembled with the valve body 301. When the valve core 303 is pressed, the valve core 303 will not deflect or bend under the guiding action of the lower limit seat 310, so as to ensure that the valve body functions well during use.

[0057] The valve core 303 has a top open glue flow channel, and a glue inlet hole 313 connected to the glue flow channel is arranged at the bottom. Figure 6 It can be seen that the glue inlet hole 313 is located on the side of the lower part of the valve core 303, and the outer wall of the lower part of the valve core 303 fits the inner wall of the lower limit seat 310; an upper sealing ring 314 and a lower sealing ring 315 are respectively arranged on the valve core 303 below and above the glue inlet hole 313. When the glue outlet valve assembly 3 is in a closed state, the upper sealing ring 314 fits tightly against the inner wall of the lower limit seat 310, and after the valve core 303 is pressed down until the glue inlet hole 313 is connected to the connecting channel 411, the upper sealing ring 314 still fits against the inner wall of the lower limit seat 310, and the lower sealing ring 315 extends out of the lower limit seat 310, and when the valve core 303 is reset, the lower sealing ring 315 keeps in contact with the inner wall of the lower limit seat 310 again. With the glue discharging valve assembly 3 adopting this double sealing ring structure, when the lower end of the valve core 303 extends out of the lower limit seat 310, the colloid in the bag 42 enters the glue inlet hole 313 through the connecting channel 411, and then flows out from the glue flow channel. At this time, the upper sealing ring 314 and the lower limit seat 310 remain in a sealed state, which can neither allow air to contact the colloid in the bag 42 nor prevent the colloid from entering the valve chamber 309. When the glue discharging stops, the lower sealing ring 315 and the lower limit seat 310 remain in a sealed state, which can prevent the colloid from leaking and entering the glue inlet hole 313.

[0058] In addition, if Figure 7As shown, the discharging gun head assembly 2 includes a gun seat 211, a pressing handle 213 and a discharging gun barrel 218, wherein the discharging gun barrel 218 moves through a positioning hole 220 provided at the lower part of the gun seat 211. In step S9, the buckling edge 212 of the lower edge of the gun seat 211 is buckled on the outer edge of the sealing top cover 302, and the discharging gun barrel 218 is now sleeved on the upper end of the valve core 303. Figure 8 The pressing handle 213 is a lever mechanism, and its front end is movably mounted on the gun seat 211. In step S9, after the gun seat 211 and the glue gun barrel 218 are installed, the pressing handle 213 is folded backward until the glue gun barrel 218 passes through the avoidance opening 217 set in the middle of the pressing handle 213, and at this time, the pressure-receiving mechanism on the glue gun barrel 218 touches the contact part 222 set on the back of the pressing handle 213. When the pressing handle 213 is pressed down, the contact part 222 presses the pressure-receiving mechanism downward, and the glue gun barrel 218 moves downward under the guidance of the positioning hole 220, and pushes the valve core 303 to move downward, thereby realizing automatic glue discharge. In addition, a limiting opening 216 is provided on the gun seat 211, and a limiting head 215 inserted into the limiting opening 216 is correspondingly provided on the pressing handle 213. In step S9, after the pressing handle 213 is folded backward, the limiting head 215 on the pressing handle 213 is inserted into the limiting opening 216, so that the movable range of the pressing handle 213 is limited by the cooperation between the limiting opening 216 and the limiting head 215.

[0059] In the above embodiment, the bag assembly 4 and the valve body 301 are assembled by plugging. Fig. 9 Threaded connection as shown or Fig.10 Assemble by welding as shown. Figure 5 Compared with the plug-in connection shown in the figure, the threaded connection is different in that the fastening section is Figure 8 The threaded section 11417 shown in the figure is provided with an internal thread, and correspondingly, the fastening assembly portion on the valve body 301 is a threaded section 1318 with an external thread. During the screwing process, the sealing ring 1308 has already contacted the inner wall of the plug-in section 1412 before the threaded section 11417 and the threaded section 1318 are fully assembled. Therefore, after the assembly is completed, the fixing and sealing of the bag joint 41 are simultaneously achieved. This assembly method using the internal thread and the external thread can improve the matching strength, and at the same time, a sealing labyrinth is formed between the threads, thereby further improving the sealing effect between the bag joint 41 and the valve body.

[0060] Compared with the aforementioned plug-in connection and threaded connection, Fig.10 The welding connection method shown is more concise, such as Fig.10As shown, the fastening section and the fastening assembly part do not need to be provided with a special assembly structure. After the fastening section is inserted into the fastening assembly part for assembly, the two are welded by a plastic welding device. This connection method can make the assembly part and the fastening assembly part integrated, so that the gap between the two is completely blocked, so that the airtightness can be ensured without using a sealing ring.

[0061] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect.

[0062] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such product or system. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.

[0063] The above description shows and describes several preferred embodiments of the present invention, but as mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention concept described herein through the above teachings or the technology or knowledge of the relevant field. Changes and variations made by those skilled in the art do not depart from the spirit and scope of the present invention, and should be within the scope of protection of the claims attached to the present invention.

Claims

1. A production method for filling glue into the bottom of a gas cylinder rubber cup based on dual packaging, which is characterized by comprising the following steps: S1: inserting the lower part of the bag connector into the bag from the bag opening of the bag, and then sealing and fixing the bag opening and the bag connector to form a bag assembly; S2: Rolling the bag assembly, and then placing the main body of the bag in a positive pressure bottle; S3: First, place the positive pressure bottle upright on the holding fixture, keep the bladder bag connector exposed from the bottle mouth of the positive pressure bottle, and then clamp the bladder bag connector on the clamping mechanism of the holding fixture; S4: insert the feed nozzle of the glue injection device into the bag joint to ensure that the end of the feed nozzle is tightly fitted with the bag joint; S5: adding a predetermined amount of material into the bag through the feed nozzle, and then separating the bag joint from the glue injection device; S6: Install the valve body of the dispensing valve assembly into the bag joint from top to bottom, and complete the fixed installation of the dispensing valve assembly and the bag joint; S7: withdraw the holding fixture that fixes the bag joint; S8: The positive pressure bottle is subjected to pressurized capping processing to complete the sealing assembly of the dispensing valve assembly and the positive pressure bottle, and at this time, the positive pressure bottle is in a positive pressure state; S9: Install the discharge gun head assembly on the glue discharge valve assembly.

2. The method for producing a gas cylinder rubber cup with glue filling as claimed in claim 1, characterized in that: In step S6, before the valve body of the dispensing valve assembly is installed into the bag joint, a support mechanism is inserted into the bag through the bag joint, and the support mechanism forms an inner channel in the bag extending downward to the bottom of the bag, and the inner channel is connected to the bag joint.

3. The method for producing a gas cylinder rubber cup with glue filling as claimed in claim 1, characterized in that: In step S5, before injecting the material, a negative pressure generating device is used to perform negative pressure pretreatment on the chamber of the pouch.

4. The method for producing a gas cylinder rubber cup with glue filling as claimed in claim 1, characterized in that: The bladder joint is a tubular structure with a connecting channel, a clamping portion cooperating with a clamping mechanism is arranged on the upper part thereof, and a connecting portion inserted into the bladder is arranged on the lower part. In step S1, the connecting portion and the bladder mouth are fused and fixed by a welding process. In step S3, the clamping mechanism clamps the clamping portion of the bladder joint. The connecting channel on the upper part of the bladder joint serves as an assembly portion and is installed on the valve body of the glue discharge valve assembly. The assembly portion includes a fastening section, and a fastening assembly portion is correspondingly arranged on the valve body. In step S6, the fastening section and the fastening assembly portion are fixedly connected by plug-in connection, threaded connection or welding connection to achieve a fastened connection between the bladder joint and the valve body.

5. The method for producing gas cylinder rubber cup bottom filling glue as claimed in claim 4, characterized in that: In step S6, when the bag connector and the valve body are connected by plug connection or threaded connection, the assembly portion further includes a sealing section, which tightly fits the sealing ring I arranged on the valve body.

6. The method for producing a gas cylinder rubber cup with glue filling as claimed in claim 4, characterized in that: The valve body includes a valve body and a valve core, wherein a sealing top cover is arranged on the upper part of the valve body. In step S8, a pressurized sealing device is used to squeeze the sealing top cover so that it is buckled with the edge of the bottle mouth of the positive pressure bottle; the lower part of the valve core is installed in the valve chamber inside the valve body, and the upper part passes through the valve body and is located outside the positive pressure bottle, and a reset spring is arranged in the valve chamber; the valve core has a glue flow channel with an open top, and a glue inlet hole connected to the glue flow channel is arranged at the lower part. Pressing downward can make the valve core move downward to the glue inlet hole and connect the connecting channel, and under the action of the reset spring, the valve core can automatically reset and cut off the connection between the glue inlet hole and the connecting channel.

7. The method for producing a gas cylinder rubber cup with glue filling as claimed in claim 6, characterized in that: An independently installed lower limit seat is provided at the lower part of the valve body, and the return spring is sleeved on the outer periphery of the valve core, with its lower end touching the upper edge of the lower limit seat, and its upper end touching the limit edge provided on the outer periphery of the valve core; before performing step S6, the valve body is assembled first: first, the valve core is inserted into the valve chamber of the valve body from bottom to top, and then the return spring is sleeved on the valve core, and then the lower limit seat is sleeved on the valve core, and finally the lower limit seat is fixedly assembled with the valve body.

8. The method for producing a gas cylinder rubber cup with glue filling as claimed in claim 7, characterized in that: The glue inlet hole is located on the side of the lower part of the valve core, and the outer wall of the lower part of the valve core fits the inner wall of the lower limit seat; an upper sealing ring and a lower sealing ring are respectively arranged on the valve core below and above the glue inlet hole, wherein the upper sealing ring always fits tightly against the inner wall of the lower limit seat, and when the valve core is reset, the lower sealing ring fits tightly against the inner wall of the lower limit seat.

9. The method for producing a gas cylinder rubber cup with glue filling as claimed in claim 6, characterized in that: The discharging gun head assembly includes a gun seat, a pressing handle and a discharging gun barrel; the gun seat is installed on the upper part of the discharging valve assembly, the discharging gun barrel is sleeved on the upper end of the valve core, and a pressure mechanism is arranged on the side of the discharging gun barrel; the pressing handle is a lever mechanism, and its front end is movably mounted on the gun seat. In step S9, after the gun seat and the discharging gun barrel are installed, the pressing handle is folded backward until the discharging gun barrel passes through the avoidance port arranged in the middle of the pressing handle, and at this time, the pressure mechanism on the discharging gun barrel touches the contact part arranged on the back of the pressing handle.

10. The method for producing a gas cylinder rubber cup with glue filling as claimed in claim 9, characterized in that: A limiting opening is provided on the gun mount, and a limiting head inserted into the limiting opening is correspondingly provided on the pressing handle. In step S9, after the pressing handle is folded backward, the limiting head on the pressing handle is inserted into the limiting opening, thereby limiting the movable range of the pressing handle through the cooperation between the limiting opening and the limiting head.

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