112 results about "Ink sac" patented technology

The utility model provides a large-capacity thermal foaming ink box which comprises a shell, a large ink bag storage cavity used for storing ink is arranged in the shell, a plastic shell is installed on one side in the shell, an anti-corrosion upper small ink bag aluminum film is installed on the upper surface of the plastic shell, and a small ink bag filtering cavity is arranged in the plastic shell. The lower surface of the plastic shell is sunken upwards to form a lower small ink bag middle cavity, the upper surface of the plastic shell is sunken downwards to form an upper small ink bag middle cavity, and a control piece used for controlling connection and disconnection of the lower small ink bag middle cavity and the upper small ink bag middle cavity is installed between the lower small ink bag middle cavity and the upper small ink bag middle cavity. A communication hole is formed between the small ink bag jet printing cavity and the middle cavity of the lower small ink bag, an ink box spray head is installed on one side, close to the plastic shell, of one side face of the outer shell, and a small ink bag conveying channel is installed between the ink box spray head and the small ink bag jet printing cavity. It is greatly guaranteed that ink is stored in the ink box and does not leak.

The invention relates to the technical field of guardrail flatness detection, in particular to a flatness detection system and method based on a high-toughness PVC guardrail, and the system comprises lower computer equipment and an upper computer analysis system: the lower computer equipment comprises a frame, and the frame is provided with three electric push rods; a coating device and an ink wiping strip are installed at the output ends of the left electric push rod and the right electric push rod correspondingly, the coating device comprises an ink bag and an ink rod, and two scraping strips inclined by 45 degrees are installed at the output end of the middle electric push rod through telescopic rods; an image capturing device is installed on the side, close to the ink wiping strip, of the frame. In the scheme, through physical marking design of lower computer equipment, intelligent analysis and automatic classification design of an upper computer system and real-time linkage of an upper computer and a lower computer, accurate marking, intelligent analysis and automatic classification of the concave-convex defects on the surface of the high-toughness PVC guardrail are achieved, the detection efficiency and accuracy are improved, and the detection efficiency is improved. And full-process closed-loop automation from guardrail feeding to classified storage is formed.

The utility model relates to the technical field of printing equipment, and discloses an ink bag and printing equipment, which comprise a body part, an ink conveying channel, an ink storage cavity, an ink outlet cavity, a cleaning channel and a piston assembly. When the printing nozzle needs to be cleaned, ink can be injected to the ink bag through the ink conveying pipeline, and the ink sequentially passes through the ink conveying channel, the cleaning channel, the cleaning opening in the cleaning channel and the ink outlet cavity and impacts the piston assembly in the ink outlet cavity, so that the piston assembly moves in the ink outlet cavity to block the ink inlet; and then the ink used for cleaning the printing nozzle can flow out through the ink outlet in the ink outlet cavity, so that the effect of cleaning the printing nozzle through the cleaning channel of the ink bag is achieved. Through the arrangement, maintenance and cleaning work of the printing spray head are facilitated, so that the printing effect is improved, and the problem of ink interruption or blockage of the printing spray head in the printing process is avoided.

The utility model discloses a makeup pen capable of quickly replacing a pen point, which comprises a makeup pen, the makeup pen comprises a pen holder, the pen point and a pen cap, the pen holder is used as a main body of the makeup pen, one end of the pen point is connected with one end of the pen holder, and the pen cap sleeves one end of the pen holder and is used for protecting the pen point. The pen holder is designed to be hollow, a strip-shaped ink bag is arranged in the pen holder and used for supplying ink to the pen point, the ink bag is designed to be transparent, the remaining ink amount can be visually seen, and when the replaced pen point is inserted into the pen holder, a magnet is attracted by a first magnet, so that the pen point is replaced. A strip-shaped ink bag is arranged in the pen holder, the tail end of the replaced pen point can be inserted into the ink bag, girls can be helped to take out the pen point for use without endurance anxiety, and the pen point can be directly opened to see how much ink is left when feeling wrong.

The present invention provides an ink supply device for an ink cartridge. The ink cartridge includes a printhead housing and an ink sac. The ink sac includes an ink sac body and a cover. The cover is detachably connected to the printhead housing and defines a mounting cavity for accommodating the ink sac body. The cover is provided with a filling port, which communicates with the inner cavity of the ink sac body. The ink supply device includes an air sac having an air inlet and an air outlet, both of which communicate with the inner and outer sides of the air sac. The air outlet is configured to be sealedly connected to the filling port. The air sac is an elastic element configured to contract when the air inlet is closed, thereby directing the gas within the air sac into the ink sac. The ink supply device provided by the present invention can supply ink from the ink sac to the printhead after the ink sac is replaced in the ink cartridge, avoiding problems such as printing line interruptions and ink flow problems.

The invention discloses a printer and a printing head cleaning method. The printer comprises a printing head cleaning stage and a printing pre-stage. When the printer is in a printing head cleaning stage, a printing head is in butt joint with the ink stack assembly, the control valve assembly controls the pipeline between the ink storage container and the ink bag to be blocked, and controls the pipeline between the cleaning fluid container and the ink bag to be communicated and the pump body to be opened, so that cleaning fluid in the cleaning fluid container is sequentially pumped into the ink bag, the printing head, the ink stack assembly and the waste liquid container; when the printer is in a printing front stage, the printing head is in butt joint with the ink stack assembly, and the control valve assembly controls the pipeline between the ink storage container and the ink bag to be connected and controls the pipeline between the cleaning liquid container and the ink bag to be blocked and controls the pump body to be opened, so that ink in the ink storage container is sequentially pumped into the ink bag, the printing head, the ink stack assembly and the waste liquid container.

The utility model discloses a novel white ink circulation system which comprises an ink barrel, an ink bag and a printing head, the ink barrel is connected with the ink bag, the ink bag is connected with the printing head, a printing protruding block is fixedly installed at the bottom end of the printing head, a spraying head is fixedly arranged on the printing protruding block, and the printing protruding block is fixedly connected with the printing head. A plugging block is detachably connected to the bottom end of the printing head, a plugging assembly is arranged on the plugging block and comprises a groove formed in the plugging block, a plugging groove is formed in the bottom end of the groove, a plugging plate is slidably connected into the plugging groove, a plugging rubber ring is fixedly connected to the plugging plate, and the plugging rubber ring is fixedly connected to the plugging plate. The blocking plate slides in the blocking groove, so that the blocking rubber ring continuously gets close to the spray head, when the blocking rubber ring makes contact with the printing protruding block, a closed space is formed between the blocking rubber ring and the printing protruding block, and the situation that dust and small particles in air are adsorbed to the spray head, and consequently the spray head is blocked is avoided.

The utility model discloses a pen with an airtight pen cap, which comprises a pen, the lower end of the pen is sleeved with a supporting ring, the lower end of the pen is fixedly connected with a connecting sleeve, the lower end of the pen is fixedly provided with an ink bag, and the outer side of the connecting sleeve is sleeved with a sealing ring. Due to the design of the observation sleeve, the storage amount of ink in the ink bag can be conveniently observed in real time so that the ink can be added in time, and due to the design of the sealing ring, the friction force of the upper end of the pen cap can be increased, and the phenomenon that normal use is affected due to rotation and looseness of the pen cap during use is prevented; by sleeving the lantern ring on the outer side of the fixed shaft and rotating and screwing the threaded ring, the correction tape is convenient to fixedly mount, after a user writes a wrong character by using the pen, the correction tape can be pulled open to be adhered to the surface of the wrong character so as to facilitate re-writing, and the lantern ring can be pressed by the design of the threaded ring to be fixed on the pen cap, so that the correction tape is prevented from loosening and falling off during carrying.

The utility model relates to a marking pen structure which comprises a pen tube, an ink bag tube, a rotary handle and a limiting cap. The front end of the ink bag tube is provided with a pen point, the writing end of the pen point is located in the pen holding end of the pen tube, the rear end of the pen tube is internally provided with a first internal thread, and the outer side is radially provided with a first external thread; second external threads are arranged on the radial outer side of the front end of the rotary handle and can be screwed into the first internal threads at the rear end of the pen tube to form connection. The tail end of the ink bag tube is connected with the front end of the rotary handle, and the writing end of the pen point can stretch out or draw back by screwing the rotary handle into or out of the pen tube. The limiting cap is screwed with the first external thread at the rear end of the pen tube through the second internal thread, so that the rotary handle is prevented from being screwed out and separated from the pen tube. Compared with the prior art, the marking pen structure realizes the telescopic function of the pen point through the matching of the rotating handle and the rear end of the pen tube and the connection of the rotating handle and the ink bag tube, and when not in use, the pen point can be retracted to the pen holding end, so that the pen point is effectively protected, and the service life of the marking pen is prolonged.

The utility model provides a dam leakage detection device. The dam leakage detection device comprises an ink bag, an injection assembly, a visual detection assembly, a nozzle and a controller. The ink bag is provided with an inner cavity used for containing ink. The spraying assembly comprises a cylinder body, a piston push rod and a telescopic driving element; a pushing cavity is formed in the cylinder body; the nozzle is communicated with the pushing cavity; a connecting channel is arranged between the pushing cavity of the cylinder body and the inner cavity of the ink bag; the piston push rod is assembled in a pushing cavity of the cylinder body in a sliding manner; the telescopic driving element can drive the piston push rod to slide in the pushing cavity in a reciprocating mode, so that the pushing cavity sucks ink from the inner cavity of the ink bag through the connecting channel and sprays the sucked ink out through the nozzle. The visual detection assembly is used for detecting the diffusion condition of ink in water. The ink in the ink bag is sucked through the piston mechanism driven by the telescopic driving element and jetted out, and quantitative and constant-speed jetting can be achieved by controlling the action of the telescopic driving element.

The water diversion structure comprises an adjuster and a water diversion core, a through hole penetrating in the axial direction of the adjuster is formed in the middle of the adjuster, the two ends of the through hole are communicated with an ink bag and a pen point respectively, the water diversion core is installed in the through hole, and the end, corresponding to the ink bag, of the water diversion core extends out of the through hole. The end, facing the ink bag, of the adjuster is provided with a plurality of protrusions abutting against and limiting the water diversion core. According to the technical scheme, the ink leading core extends out of the through hole and is limited at the end of the regulator, so that the contact area of ink and the ink leading core is increased, the siphoning effect is better achieved, and the ink outlet effect is improved.

The ink bag structure comprises an ink bag main body and an inching valve, a soft membrane and a partition plate are arranged in the ink bag main body, the inner space of the ink bag main body is divided into an inflation cavity, a flow guide cavity and an ink storage cavity through the soft membrane and the partition plate, a flow guide hole is formed in the partition plate, the inflation cavity is connected with an inflation device, and the ink storage cavity is connected with the inflation device. The ink storage cavity is connected with the spray head assembly, the inflation device is connected with the inflation cavity through the inflation channel, the inching valve is installed on the side, facing the ink storage cavity, of the soft diaphragm, and the end, away from the soft diaphragm, of the inching valve penetrates through the flow guide hole and extends into the flow guide cavity so that the inching valve can be driven to move to open or close the flow guide hole through swinging of the soft diaphragm. Compared with the prior art, the ink cartridge has the advantages that the inflation cavity is inflated through the inflation device, so that the soft diaphragm drives the inching valve to move, the ink storage cavity is communicated with the flow guide cavity, ink is pressed into the nozzle assembly through the ink cartridge assembly, and the effect of discharging air in the nozzle assembly is achieved.

The invention belongs to the technical field of traditional Chinese medicine preparations, and particularly discloses a cuttlefish ink composition and a preparation method and application thereof.The cuttlefish ink composition comprises an active ingredient and auxiliary materials with effective treatment dose, the active ingredient is cuttlefish ink, and the cuttlefish ink is a dry ink bag of sepia esculenta or sepiella maindroni of cuttlefish animals; the auxiliary materials comprise a flavoring agent, an excipient and a hollow capsule, and the nitrogen content in every 1g of the cuttlefish ink composition is not less than 65mg. The cuttlefish ink composition and the preparation method and application thereof are used for systemic hemostasis, and the occurrence rate of side effects is obviously lower than that of existing medicines.

The utility model discloses a pen capable of effectively preventing ink leakage, which comprises a pen body, one side of the pen body is fixedly provided with a pen nib, the other side of the pen body is provided with an ink bag, one side of the ink bag is fixedly connected with a mounting ring, the mounting ring is sleeved with the center of the other side of the pen body, and the pen nib is fixedly connected with the mounting ring. A plurality of first sealing grooves are formed in the position, close to the outer side, of the surface of the other end of the pen body, and first sealing gaskets are fixedly connected to the inner walls of the first sealing grooves. According to the pen capable of effectively preventing ink leakage, three layers of sealing structures are innovatively designed between the pen body and the mounting ring of the ink bag, namely a sealing groove I and a sealing gasket I, a sealing groove II and a sealing gasket II, and a sealing groove III and a sealing gasket III, so that the ink leakage can be effectively prevented due to the multi-layer sealing design; even if a certain layer of sealing is slightly worn due to long-term use or external force influence, other layers of sealing can still play a role, and ink leakage is effectively prevented.

The present application relates to the field of marker writing, and in particular to a strong sealing antibacterial marker and a preparation method thereof, comprising an ink sac and ink stored in the ink sac; the ink comprises the following components by weight: 50-60 parts of aqueous self-crosslinking acrylic emulsion, 10-20 parts of titanium dioxide, 1-5 parts of organic dispersant, 5-10 parts of color paste, 5-8 parts of wetting agent, 10-20 parts of filler, 10-20 parts of water and 10-20 parts of antibacterial preparation; the antibacterial preparation comprises quaternary ammonium salt, grapefruit seed extract powder and acetic acid. The preparation method of the present application has the advantage of enhancing the antibacterial property of marker ink.

The utility model provides an ink temperature control device for a digital printing machine, which comprises a plurality of ink boxes, a heating device, a printing nozzle, a plurality of ink bags and a fixing device for fixing the plurality of ink bags, the heating device is arranged on the surface of each ink box, a first ink tube is arranged at the bottom end of each ink box, a second ink tube is arranged at the top end of each ink bag, and the first ink tube is connected with the second ink tube. The first ink pipes and the second ink pipes correspond to each other in pairs, the filters are installed between the corresponding first ink pipes and second ink pipes, the fixing device is installed at the top end of the printing spray head, ink in the ink box is heated through the arranged heating device, and therefore the situation that the fluidity of the ink is poor due to the low temperature is avoided; ink enters the filter through the first ink pipe to be filtered, so that the product printing effect of the printing spray head can be improved, the filtered ink enters the ink bag through the second ink pipe, heat preservation can be further conducted on the ink through the arranged heating piece, and therefore the printing effect of the printing machine is effectively improved.

This application discloses an ink cartridge storage device, including a housing and a storage base. The storage base is slidably installed inside the housing and can pop out or retract relative to the housing. The storage base has a storage cavity for accommodating multiple ink cartridges. The top of the storage base has a cover for opening and closing the housing. The housing has a locking mechanism, and the bottom of the storage base has a latch adapted to the locking mechanism. The latch is slidably connected to the locking mechanism to lock the storage base inside the housing. A first elastic element is provided between the storage base and the housing. The cover is pressed against the storage base, causing the latch to be forced to unlock from the locking mechanism. The storage base pops out relative to the housing under the action of the first elastic element. This device not only effectively protects the ink cartridges but also has the advantages of simple and labor-saving operation and quick access to the ink cartridges.

The utility model relates to the technical field of printers, in particular to an ink channeling prevention printer which comprises a printer body. The ink bag is mounted on the printer body; the nozzle is communicated with the ink bag; the ink pad is slidably mounted on the printer body and can slide to abut against the nozzle, and a cavity is formed between the ink pad and the nozzle; the driving device is used for driving the ink pad to move in the direction close to or away from the nozzle; and the pipeline is connected with an ink pump, is communicated with the cavity and is used for adjusting the pressure in the cavity. The method has the effect of reducing ink channeling.

The invention belongs to the field of multifunctional wound dressings, and provides preparation of a high-strength and high-toughness natural polymer hydrogel wound dressing with excellent photo-thermal performance. The preparation method comprises the following steps: firstly, separating cuttlefish element nanoparticles from ink sacs of cuttlefishes, then oxidizing sodium alginate by sodium periodate to generate oxidized sodium alginate with aldehyde groups, and grafting dopamine onto the oxidized sodium alginate at the same time; the preparation method comprises the following steps: preparing a polydopamine-oxidized sodium alginate network, polymerizing polyvinyl alcohol and polyvinylpyrrolidone, adding the polydopamine-oxidized sodium alginate network while polymerizing polyvinyl alcohol and polyvinylpyrrolidone, and finally doping cuttlefish element nanoparticles into the polymer network to obtain the natural polymer-based multifunctional hydrogel wound dressing wrapping the cuttlefish element nanoparticles. The dressing disclosed by the invention is prepared from all-natural high polymer materials, is environment-friendly and excellent in biocompatibility, and can perfectly accord with the physiological characteristics of human skin; in addition, the hydrogel also has good photo-thermal performance, oxidation resistance, strength and toughness, and can effectively inhibit the growth of bacteria at the wound to ensure that the hydrogel is not damaged during wound healing and does not cause damage to skin tissues.

The invention relates to an ink box structure, a piezoelectric nozzle and an ink-jet printing system, the ink box structure comprises a bottom shell, the bottom surface of the bottom shell is provided with a mounting structure for mounting a chip, and the bottom surface of the bottom shell is provided with a through first communication hole; the mounting seat is inserted into the bottom shell, and a second through communication hole communicating with the second communication hole is formed in the top surface of the mounting seat; the ink bag is mounted on the mounting seat, and a liquid outlet of the ink bag is communicated with a liquid inlet of the chip through the second communication hole and the first communication hole; the bottom of the protective shell is open, the protective shell covers the mounting base, and the mounting base blocks the opening of the protective shell to form a sealed cavity; and the sealing cavity is communicated with an external negative pressure device through the ventilation structure. The functional liquid is supplied to the chip through ink flowing out of the ink bag, an ink supply system does not need to be additionally arranged, the occupied space and the cost are saved, all parts of the ink box structure are arranged in a split mode and are easy and convenient to assemble, the manufacturing cost is low, and the ink-jet printing technology is applied and popularized.

1. The name of the design product: ink sac fixing frame with multiple ink sacs that can be quickly disassembled. 2. The use of the design product: the rotating limiting frame is provided with movable fixing for multiple ink sacs, a single ink sac can be independently disassembled, and the ink sac bin is provided with a anti-falling groove. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

The utility model discloses a direct liquid type soft head propylene mark pen with a replaceable ink bag structure and a guide seal, which comprises a pen cap assembly, a pen point assembly, an ink bag assembly, a pen neck and a pen holder, and the ink bag assembly is detachably arranged in the pen holder; the pen cap assembly comprises a pen cap, an air-proof sleeve and a spring, the air-proof sleeve is arranged in the pen cap, the air-proof sleeve and the pen cap are coaxial, and the air-proof sleeve is provided with a moving space in the axial direction of the pen cap; the spring is sleeved on the air-proof sleeve, one end of the spring abuts against the pen cap, and the other end of the spring abuts against the outer side wall of the air-proof sleeve. The anti-gas pen has the advantages that the anti-gas sleeve is tightly attached to the pen point assembly under the elastic force effect of the spring, and therefore the good sealing effect is achieved; the spring can continuously provide elastic force to enable the air-proof sleeve to be tightly attached to the pen point assembly, and therefore a good sealing effect is continuously obtained. The ink bag assembly is detachable, and in the using process, after ink in the ink bag assembly is used up, the ink bag assembly is replaced with a new ink bag assembly, and then normal use can be continued.

The whiteboard pen belongs to the technical field of stationery and comprises a pen holder, a pen point is fixedly mounted at the position, close to the front end, in the pen holder, a disposable ink bag is slidably inserted in the position, close to the rear end, in the pen holder, the rear end of the pen holder is in threaded connection with a rear cover, and a plurality of limiting grooves are formed in the lower surface of the rear cover; the front end of the pen holder is slidably sleeved with an upper cover, and a plurality of limiting blocks are fixedly installed on the inner bottom wall of the upper cover; the rear cover is sleeved with the upper cover, so that the limiting blocks are conveniently inserted into the limiting grooves, the upper cover and the rear cover are temporarily assembled together to form a whole, namely, the rear cover can be driven to rotate synchronously by screwing the upper cover, and by means of the characteristic that the contact area between the upper cover and the human hand is large and the friction force is large, the human hand can be driven to rotate synchronously; therefore, a writer can easily unscrew the rear cover to replace the disposable ink bag, operation is simple and flexible, and labor is saved.

The penholder assembly with the ink locking function comprises a penholder, a pen point, a cotton core assembly and a valve seat, the pen point, the cotton core assembly and the valve seat are installed in the penholder, the valve seat is provided with an ink inlet groove used for being connected with an ink bag, and the cotton core assembly comprises water diversion cotton and water blocking cotton which are arranged on the inner side and the outer side of the valve seat in a sleeved mode respectively. The water-blocking cotton is sleeved on the outer side of the valve seat, and compared with the water-guiding cotton, the water-blocking cotton is different in that the water-blocking cotton cannot actively absorb ink, normal ink supply of the water-guiding cotton is not affected, and the water-blocking cotton is not prone to falling off, so that the water-blocking cotton is not prone to falling off, and the water-blocking cotton is not prone to falling off. When the ink amount at the pen point is too large, the ink overflowing from the side face of the pen point enters the water locking cavity until the whole water blocking cotton is filled with the ink, and the ink leakage condition is avoided; when ink is not supplied to the ink inlet groove in time, the ink in the ink locking cavity flows to the pen point, and therefore the functions of ink locking, ink retaining and ink adding are achieved.

This application discloses a knob-type ink cartridge, including a cartridge body for accommodating multiple ink cartridges. The cartridge body has an outlet adapted to the ink cartridges. A first blocking member adapted to the outlet is rotatably installed inside the cartridge body. A knob is installed on the outer wall of the cartridge body. The end of the first blocking member passes through the outer wall of the cartridge body and connects to the knob. The knob is subjected to force to drive the first blocking member to rotate. The first blocking member is used to rotate to open or close the outlet. The bottom wall of the cartridge body is inclined. The ink cartridges roll along the bottom wall to the outlet under the action of gravity. The outlet is opened or closed by controlling the rotation of the first blocking member by the knob. The operation is intuitive and has a certain degree of fun. By setting the bottom wall of the cartridge body to be inclined, the ink cartridges roll along the bottom wall to the outlet using their own weight, eliminating the complex power structure, resulting in lower production costs and higher reliability.

The utility model discloses a spray head bearing frame and desktop printing equipment applying the spray head bearing frame. The spray head bearing frame comprises a supporting vertical plate, a mounting plate is fixed to the lower end of the supporting vertical plate, a printing spray head is integrated on the upper surface of the mounting plate, and a plurality of ink bags are arranged above the printing spray head; and side plates are fixed on the two sides of the mounting plate. According to the utility model, the printing nozzle, the ink bag and the control main card, namely the board card, can be integrated in the nozzle bearing frame, so that the occupied space is reduced, and the miniaturization improvement of desktop printing equipment is facilitated.

The utility model provides a neutral pen with a replaceable ink bag, and belongs to the technical field of stationery. The problems that an existing gel pen is small in ink amount and short in use time, and the use cost of a gel pen refill is large are solved. The pen comprises a pen body and an ink bag, the pen body comprises a front pen rod and a rear pen rod, the rear pen rod is connected with the tail end of the front pen rod, a pen point is arranged at the front end of the front pen rod, an ink passing cavity is formed in the front pen rod, the front end of the ink passing cavity is communicated with the pen point, and the tail end of the ink passing cavity is connected with an inserting piece. The ink bag is matched with the inserting piece in an inserting mode and communicated with the ink passing cavity through the inserting piece. The pen is mainly used for writing.

The utility model belongs to the field of writing tools, and provides a direct liquid type writing tool which comprises a pen holding part capable of being connected with a pen shell, a first cavity and a second cavity which are communicated with each other are formed in the pen holding part, a water storage device is arranged in the first cavity, and a pen point is connected with the water storage device and extends out of the first cavity; a guide pipe is arranged in the second cavity, and the guide pipe and the water storage device are coaxially arranged; a guide part and a connecting part are formed at the end part of the ink bag tube, and an included angle is formed between the guide part and the connecting part. Compared with the prior art, the writing tool has the advantages that the connecting part is tightly assembled on the guide pipe, so that the writing tool normally realizes a writing function, the ink bag pipe and the pen holding part are detachably mounted, and the replacement of the ink bag pipe ensures the continuous use of the writing tool; and not only is the waste of other undamaged materials in use effectively avoided, but also the overall use cost of consumers is reduced, and meanwhile, the convenience brought by the consumers in the use process is also improved.

The utility model relates to the technical field of ink-jet printing heads, and discloses a double-color ink bag for an ink-jet printing head, which comprises a first ink bag, a second ink bag is mounted on one side of the first ink bag, pipeline connectors are mounted at the top ends of the first ink bag and the second ink bag, protective sleeves are arranged on the outer side walls of the pipeline connectors, and the protective sleeves are connected with the first ink bag and the second ink bag. And a limiting block is mounted on one side of each mounting block. After the double-color ink bag is installed in an ink-jet printer, an external ink conveying pipeline and the pipeline connector are installed together to convey ink, and the protective sleeve, the installation block, the limiting block, the threaded rod and other assemblies are arranged on the outer side wall of the pipeline connector. According to the pipeline connector, a pipeline for conveying ink and the pipeline connector can be locked after being installed together, so that the pipeline for conveying ink and the pipeline connector can be stably installed together, and the pipeline connector is not prone to loosening and falling off in the using process.