Continuous jet printing one-inch industrial ink box for thermal foaming

Abstract

The invention relates to the technical field of jet printing, in particular to a continuous jet printing one-inch industrial ink box for thermal foaming. An inner frame is arranged in the protection piece; the auxiliary block is installed on the front wall in the inner frame, and the upper end face of the auxiliary block is sunken downwards to form a control cavity; the first composite film is arranged at the upper end of the inner frame after the area is enlarged through a stretching process; the second composite film is mounted at the lower end of the inner frame after increasing the area through a stretching process; the control piece is arranged in the control cavity; the ink supplementing piece is installed on the auxiliary block, and the ink supplementing piece communicates with the control cavity; according to the design, ink in the supplementing groove is supplemented in a self-adaptive mode, so that it is guaranteed that the interiors of the spaces such as the control cavity are in a negative pressure constant state all the time, and the ink storage cavity, the control cavity, the control cavity hole, the supplementing groove, the second jet printing groove, the groove and other storage spaces are matched for use; the use capacity of the ink is greatly improved; the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The application is a continuous inkjet one-inch industrial cartridge for thermal foaming, belonging to the field of inkjet technology. BACKGROUND

[0002] Food production date printing is a key link that is universally valued by countries around the world, directly related to consumers' judgment of product freshness, shelf life and quality traceability demand, and is also the core support for protecting consumers' rights and interests. With the promotion of global commodity trade, the market demand for packaging labels is increasing, and the printing technology has gradually expanded from the food industry to pharmaceuticals, packaging, customized production and other fields. Traditional printing technology can only achieve fixed information printing, which is difficult to meet the dynamic information printing needs of modern society such as "one product one code", and the variable code printing efficiency is low, which has been gradually replaced by new equipment such as thermal foaming inkjet printers. Among them, the thermal foaming inkjet printer has the advantages of low price, maintenance-free, etc., and occupies a dominant position in the market, and the thermal foaming ink cartridge is its core accessory.

[0003] The height of the one-inch thermal foaming ink cartridge is 25.4mm, and its printing principle is based on precise thermal control technology: the array resistor on the COT circuit board heats the ink, and the micro amount of ink (≤5 picoliters) in the specified nozzle area is rapidly heated to above 300℃. This process will instantly generate a large number of tiny bubbles, which will converge and rapidly expand within 10 microseconds, forming pressure that forces the ink droplets to be ejected through the nozzle to complete the printing action. Subsequently, the bubbles dissipate within a few microseconds and return to the resistor area, and the ink at the nozzle is retracted under the action of surface tension, ready for the next printing.

[0004] Despite the mature technology, the one-inch thermal foaming ink cartridge on the current market still has shortcomings: first, the one-inch thermal foaming ink cartridge adopts a single storage space design, relying on the aluminum sheet and the aluminum sheet spring to maintain the stability of the internal negative pressure. This structure limits the amount of ink filling - if too much is filled, it will easily cause the aluminum sheet spring to fail, disrupt the negative pressure balance and cause ink leakage from the nozzle, directly leading to a low effective capacity of the ink cartridge; second, when the one-inch thermal foaming ink cartridge is about to be replaced, the internal negative pressure system is prone to fail prematurely, and 15%-20% of the ink in the single storage chamber cannot be utilized, resulting in a low ink usage rate and significantly increasing the user's usage cost; third, the height of the one-inch thermal foaming ink cartridge nozzle is 25.4mm, which is more than twice the height of the half-inch thermal foaming ink cartridge nozzle of 12.7mm. Due to the height of the printing, when all the nozzles are synchronized to eject ink, the ink is concentrated in the aluminum sheet control area, and the driving force provided by the aluminum sheet spring is insufficient to achieve synchronized ink supply for all nozzles, which can easily cause the upper end of the nozzle to not eject ink, the lower end to eject ink normally, ink supply interruption when the printing speed is fast, and printing distortion. SUMMARY

[0005] The application provides a continuous ink-jet one-inch industrial ink cartridge for thermal foaming.

[0006] The application solves the technical problems by adopting the technical scheme that The application provides a continuous ink-jet one-inch industrial ink cartridge for thermal foaming, which comprises the following parts: An inner frame; A protection part, wherein the inner frame is arranged in the protection part; An auxiliary block, which is arranged on the inner wall of the inner frame, and the upper and lower end faces of the auxiliary block are coincident with the upper and lower end faces of the inner frame, and the auxiliary block is integrated with the inner frame, and the upper end face of the auxiliary block is concave downward to form a control cavity; A first composite film, which is arranged on the upper end of the inner frame by increasing the area through a stretching process, and the lower end of the first composite film is connected with the upper end of the auxiliary block; A second composite film, which is arranged on the lower end of the inner frame by increasing the area through a stretching process, and the upper end of the second composite film is connected with the lower end of the auxiliary block; A control part, which is arranged in the control cavity; An ink supplementing part, which is arranged on the auxiliary block and is communicated with the control cavity; A filter part, which is arranged on the auxiliary block; An upper half of a COT circuit board, which is arranged at the front end of the protection part; Further, a wafer body and a plurality of thermistors are arranged at the front end of the upper half of the COT circuit board, and the plurality of thermistors are arranged outside the wafer body; Further, a plurality of heating resistors and a plurality of spray hole structures are arranged in the wafer body; A lower half of the COT circuit board, which is arranged at the left end of the protection part; Further, the spray hole structure is composed of a plurality of spray holes, and the cross section of the spray hole is in a tapered shape with a narrow front end and a wide rear end, the plurality of heating resistors are arranged in the plurality of spray holes, the plurality of thermistors are electrically connected with the heating resistors in the wafer body, and the heating resistors and the thermistors are electrically connected with the lower half of the COT circuit board.

[0007] Further, the filter part comprises a filter screen, the upper end face of the auxiliary block is concave downward to form a placing groove, the bottom end face of the placing groove is concave downward to form a groove, the upper end face of the auxiliary block is concave downward to form a second ink-jet groove, the second ink-jet groove is arranged at the front side of the control cavity, the front end of the second ink-jet groove is communicated with the rear end of the placing groove, the bottom end of the second ink-jet groove is concave downward to form a second connecting hole, the filter screen is arranged on the bottom end of the placing groove, the front wall of the groove is concave forward to form a first ink-jet groove, a buffer column is arranged in the first ink-jet groove, and the front end of the first ink-jet groove penetrates through the protection part and is communicated with the spray hole structure.

[0008] Further, the ink supplementing member comprises a first flow channel and a second flow channel, the upper end of the auxiliary block is recessed to form the first flow channel and the second flow channel, the second flow channel is in the shape of L in cross section, the first flow channel is in communication with the right end of the control cavity, and the second flow channel is in communication with the left end of the control cavity. The rear end of the auxiliary block is recessed to form a third connecting hole, the front end of the third connecting hole is in communication with the rear end of the second flow channel, the right end of the auxiliary block is recessed to form a first connecting hole, and the left end of the first connecting hole is in communication with the right end of the first flow channel.

[0009] Further, the control member comprises a first end cover, the first end cover is installed in the control cavity, the upper end of the first end cover is coincided with the upper end of the auxiliary block, the lower end of the first end cover is provided with a first elastic member, the lower end of the first elastic member is installed with a T-shaped movable valve, the outer end of the vertical cylindrical part of the T-shaped movable valve is sleeved with a sealing rubber, and the sealing rubber is attached to the inner bottom end of the control cavity, the inner bottom end of the control cavity is recessed to form a control cavity hole, and the control cavity hole is located below the sealing rubber, the control cavity hole is in the shape of cross, and the control cavity hole is located at the rear side of the second connecting hole. The lower end of the auxiliary block is recessed to form a supplement groove, and the upper end of the supplement groove is in communication with the lower end of the control cavity hole and the lower end of the second connecting hole, respectively, a second end cover is movably installed in the supplement groove, the upper end of the second end cover is provided with a second elastic member, the upper end of the second elastic member is connected with the inner top end of the supplement groove, the lower end of the vertical cylindrical part of the T-shaped movable valve penetrates through the control cavity hole and is connected with the second end cover, and the vertical cylindrical part of the T-shaped movable valve is located inside the second elastic member.

[0010] Further, the protection member comprises an outer frame, an inner frame is installed in the inner frame, a first protection cover is arranged on the upper end of the outer frame, a second protection cover is installed on the lower end of the outer frame, an ink injection hole is recessed on the front end of the outer frame, and the ink injection hole extends to the inner wall of the inner frame, the ink injection hole is located on the right side of the auxiliary block, the upper half of the COT circuit board is installed on the front end of the outer frame, the lower half of the COT circuit board is arranged on the left end of the outer frame, and the first printing slot penetrates through the outer frame and is in communication with the wafer body.

[0011] Further, a plurality of hollow rods are equidistantly installed on the lower end of the filter screen, and the hollow rods extend to the upper end of the filter screen, a fixing rod is arranged on the front and rear ends of the hollow rod, and the two fixing rods are respectively connected with the front and rear walls of the groove, the fixing rod is located on the lower side of the filter screen, the upper end of the hollow rod is slidably connected with a round rod, and the lower end of the round rod penetrates through the hollow rod. The lower end of the circular rod is provided with a floating ball, and the floating ball is attached to the lower end of the hollow rod, a plurality of fan blades are equidistantly arranged at the upper end of the circular rod, and the fan blades are located below the first composite film, the inner wall of the hollow rod is outwardly recessed to form a spiral groove, and a rolling member is arranged at the outer end of the circular rod, and the rolling part of the rolling member is in rolling connection with the spiral groove.

[0012] The beneficial effects of the present application are: The first composite film and the second composite film are respectively arranged at the upper and lower ends of the inner frame, at this time, the inner frame, the lower end of the first composite film, the upper end of the second composite film, and the outer end of the auxiliary block form an ink storage cavity, and the ink is filled into the first flow channel, the second flow channel, the control cavity, the control cavity hole, and the supplement groove through the first connecting hole and the third connecting hole, when the ink pressure in the control cavity is greater than the ink pressure in the supplement groove, at this time, the sealing rubber pad will block the control cavity hole, when the ink pressure in the control cavity is less than the ink pressure in the supplement groove, at this time, the second end cover, the T-shaped movable valve, and the sealing rubber pad will move upward due to the negative pressure in the supplement groove, at this time, the ink in the control cavity enters the supplement groove through the control cavity hole, and the supplement groove, the second printing groove, and the groove are filled with ink again, realizing self-adaptive supplement of the ink in the supplement groove, thereby ensuring that the inner space of the control cavity is always in a constant negative pressure state, effectively reducing the probability of ink leakage, and ensuring that the supplement groove, the second printing groove, and the groove are in a constant ink capacity state for a long time, thereby effectively ensuring sufficient and smooth ink supply and improving printing speed and efficiency, and under the constant negative pressure state, the cooperation of the ink storage cavity, the control cavity, the control cavity hole, the supplement groove, the second printing groove, and the groove storage space greatly improves the use capacity of the ink and reduces the production cost, and the cooperation of the first flow channel, the first connecting hole, the second flow channel, and the third connecting hole effectively reduces the residual amount of ink in the ink storage cavity, and under the action of the buffer column, the ink is more easily supplied to the wafer body. BRIEF DESCRIPTION OF DRAWINGS

[0013] Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments, made with reference to the accompanying drawings: Figure 1 A structure diagram of a continuous printing one-inch industrial ink cartridge for thermal foaming according to the present application; Figure 2 A perspective view of a continuous printing one-inch industrial ink cartridge for thermal foaming according to the present application; Figure 3 An exploded view of a continuous printing one-inch industrial ink cartridge for thermal foaming according to the present application; Figure 4 A sectional view of a continuous printing one-inch industrial ink cartridge for thermal foaming according to the present application; Figure 5 A sectional view of a continuous printing one-inch industrial ink cartridge for thermal foaming according to the present application;Figure 4 Detail view of middle A part; Figure 6 Front perspective view of the outer frame of a one-inch industrial cartridge for continuous jet printing for thermal foaming according to the present invention; Figure 7 Back perspective view of the outer frame of a one-inch industrial cartridge for continuous jet printing for thermal foaming according to the present invention; Figure 8 Perspective view of a T-shaped movable valve of a one-inch industrial cartridge for continuous jet printing for thermal foaming according to the present invention; Figure 9 Perspective view of a first end cap of a one-inch industrial cartridge for continuous jet printing for thermal foaming according to the present invention; Figure 10 Perspective view of a sealing gasket of a one-inch industrial cartridge for continuous jet printing for thermal foaming according to the present invention; Figure 11 Perspective view of a second end cap of a one-inch industrial cartridge for continuous jet printing for thermal foaming according to the present invention; Figure 12 Sectional view of a first jet printing slot of a one-inch industrial cartridge for continuous jet printing for thermal foaming according to the present invention; Figure 13 Addressing circuit diagram of a COT circuit board of a one-inch industrial cartridge for continuous jet printing for thermal foaming according to the present invention; Figure 14 Pulse diagram of a jet signal of a one-inch industrial cartridge for continuous jet printing for thermal foaming according to the present invention; Figure 15 Drive circuit diagram of a wafer body of a one-inch industrial cartridge for continuous jet printing for thermal foaming according to the present invention; Figure 16 Circuit diagram of a calibration resistor of a one-inch industrial cartridge for continuous jet printing for thermal foaming according to the present invention; Figure 17 Flowchart of automatic adjustment of voltage to obtain optimal jet printing voltage of a one-inch industrial cartridge for continuous jet printing for thermal foaming according to the present invention; Figure 18 Another embodiment of a one-inch industrial cartridge for continuous jet printing for thermal foaming according to the present invention; Figure 19 Figure 18 Detail view of middle B part; Figure 20 Perspective view of a float ball of a one-inch industrial cartridge for continuous jet printing for thermal foaming according to the present invention.

[0014] In the figure: 1. outer frame, 11. ink injection hole, 12. lower half of COT circuit board; 2. first protective cover; 3. upper half of COT circuit board, 31. wafer body; ​4. First composite membrane; 5. Control chamber; 51. T-shaped movable valve; 52. First elastic element; 53. First end cap; 54. Sealing gasket; 55. Second end cap; 56. Second elastic element; 57. Control chamber hole. 6. Auxiliary block; 61. Supplementing groove; 62. Groove; 63. First printing groove; 631. Buffer column; 64. Filter screen; 641. Float ball; 642. Fan blade; 643. Round rod; 644. Hollow rod; 645. Fixing rod; 646. Spiral groove; 647. Universal ball bearing; 65. Placement groove; 66. First flow channel; 661. First connecting hole; 67. Second printing groove; 671. Second connecting hole; 68. Second flow channel; 681. Third connecting hole; 7. Second composite membrane; 8. Second protective cover; 9. Inner frame. Detailed Implementation

[0015] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0016] Example 1: As Figures 1-12 As shown, a one-inch industrial ink cartridge for continuous inkjet printing for thermal foaming is provided, including: an inner frame 9, which is installed inside an outer frame 1, and provides a mounting carrier for an auxiliary block 6 through the inner frame 9; a first protective cover 2 is set on the upper end of the outer frame 1, and a second protective cover 8 is installed on the lower end of the outer frame 1. The first protective cover 2 and the second protective cover 8 work together to achieve a protective function; an ink injection hole 11 is formed by a rearward recess at the front end of the outer frame 1, extending to the inner wall of the inner frame 9, and the ink injection hole 11 is located on the right side of the auxiliary block 6; ink is injected into the inner frame 9 through the ink injection hole 11. An auxiliary block 6, which is integral with the inner frame 9, is installed on the inner front wall of the inner frame 9. The upper and lower end faces of the auxiliary block 6 coincide with the upper and lower end faces of the inner frame 9. The auxiliary block 6 provides a processing carrier for components such as the control cavity 5. The first composite film 4 is placed on the upper end of the inner frame 9, and the lower end of the first composite film 4 is connected to the upper end of the auxiliary block 6. The second composite film 7 is installed on the lower end of the inner frame 9, and the upper end of the second composite film 7 is connected to the lower end of the auxiliary block 6. The first composite film 4 and the second composite film 7 are used together after the area is increased by the stretching process. After shrinking, they coincide with the contour of the inner frame 9, which effectively reduces the amount of ink residue. The upper end of the auxiliary block 6 is recessed downward to form a control cavity 5. The control cavity 5 provides installation space for the first end cover 53 and other components. The first end cover 53 is installed in the control cavity 5, and the upper end of the first end cover 53 coincides with the upper end of the auxiliary block 6. The first end cover 53 provides installation space for the first elastic member 52, and the first elastic member 52 is arranged on the lower end of the first end cover 53. The first elastic member 52 returns the T-shaped movable valve 51 to its original position. The first elastic member 52 can be a spring. The bottom end of the control cavity 5 is recessed downward to form a control cavity hole 57 in a cross-shaped structure. The control cavity hole 57 is located at the lower end of the sealing rubber pad 54 and at the rear side of the second connecting hole 671. The control cavity hole 57 connects the control cavity 5 and the supplementary groove 61. The lower end of the auxiliary block 6 is recessed upward to form the supplementary groove 61. The upper end of the supplementary groove 61 is connected to the lower end of the control cavity hole 57 and the lower end of the second connecting hole 671, respectively. The supplementary groove 61 transports ink into the second connecting hole 671. The second end cover 55 is movably installed in the supplementary groove 61. The second end cover 55 provides installation space for the second elastic member 56 and other components, and the second elastic member 56 is arranged on the upper end of the second end cover 55. The upper end of the second elastic member 56 is connected to the inner top end of the supplementary groove 61. The second elastic member 56 returns the second end cover 55 to its original position. The second elastic member 56 can be a spring. The T-shaped movable valve 51 is installed at the lower end of the first elastic member 52. The lower end of the vertical cylindrical part of the T-shaped movable valve 51 penetrates the control cavity hole 57 and is connected to the second end cover 55. The vertical cylindrical part of the T-shaped movable valve 51 is located inside the second elastic member 56. The T-shaped movable valve 51 provides installation space for the sealing rubber pad 54 and other components. The sealing rubber pad 54 is sleeved on the outer end of the vertical cylindrical part of the T-shaped movable valve 51. The sealing rubber pad 54 is attached to the inner bottom end of the control cavity 5. The sealing rubber pad 54 blocks the control cavity hole 57. The upper end of the auxiliary block 6 is recessed downward to form a first flow channel 66 and a second flow channel 68. The second flow channel 68 has an L-shaped cross-section. The first flow channel 66 is connected to the right end of the control cavity 5. The second flow channel 68 is connected to the left end of the control cavity 5. The first flow channel 66 and the second flow channel 68 cooperate to transport ink into the control cavity 5. The rear end of the auxiliary block 6 is recessed forward to form a third connecting hole 681. The front end of the third connecting hole 681 is connected to the rear end of the second flow channel 68. The third connecting hole 681 transports ink into the second flow channel 68. The right end of the auxiliary block 6 is recessed leftward to form a first connecting hole 661. The left end of the first connecting hole 661 is connected to the right end of the first flow channel 66. The first connecting hole 661 transports ink into the first flow channel 66. The upper end of the auxiliary block 6 is recessed downward to form a placement groove 65, which provides installation space for the filter screen 64. The bottom end of the placement groove 65 is recessed downward to form a recess 62. The front wall of the recess 62 is recessed forward to form a first printing slot 63. The recess 62 cooperates with the first printing slot 63 to outwardly deliver ink. The first printing slot 63 is internally provided with a buffer column 631, which makes it easier for ink to be supplied to the wafer body 31. The upper end of the auxiliary block 6 is recessed downward to form a second printing slot 67 on the front side of the control cavity 5. The front end of the second printing slot 67 is in communication with the rear end of the placement groove 65. The second printing slot 67 is internally provided with a second connecting hole 671, which makes the second printing slot 67 in communication with the replenishment groove 61. The filter screen 64 is installed on the bottom end of the placement groove 65, which filters the ink.

[0017] During assembly, the filter screen 64 is first installed on the placement groove 65, and then the T-shaped movable valve 51 and the first elastic member 52 are installed on the channel structure formed by the control cavity 5, the control cavity hole 57, and the replenishment groove 61. Because the first composite film 4 and the second composite film 7 have high toughness, the film area of the first composite film 4 and the second composite film 7 can be increased by 2 / 5 through a stretching process. Then, the first composite film 4 and the second composite film 7 are installed on the upper and lower ends of the inner frame 9 through a hot-press sealing process. At this time, the inner frame 9, the lower end of the first composite film 4, the upper end of the second composite film 7, and the outer end of the auxiliary block 6 form an ink storage cavity. The stretching and hot-press sealing technology improves the contour matching degree of the first composite film 4 and the second composite film 7 with the inner frame 9. Then, the first protective cover 2 and the second protective cover 8 are installed on the upper and lower ends of the outer frame 1, respectively, to complete the assembly of the ink cartridge. The processes related to the assembly are all existing technologies, which can effectively reduce the manufacturing cost of the ink cartridge.

[0018] Before use, the ink hole 11 is used to fill the ink storage cavity with an appropriate amount of ink. At this time, the filled ink will sequentially fill the first connecting hole 661, the third connecting hole 681, the first flow channel 66, the second flow channel 68, the control cavity 5, the control cavity hole 57, the replenishment groove 61, the second connecting hole 671, the second printing slot 67, the placement groove 65, the recess 62, and the first printing slot 63. Then, a plug such as a steel ball is inserted into the ink hole 11 to prevent the ink from leaking. Then, the structure composed of the outer frame 1, the first protective cover 2, and the second protective cover 8 is installed into a hot-foaming inkjet printer.

[0019] In use, the ink in the ink storage cavity enters the first flow channel 66 and the second flow channel 68 through the first connecting hole 661 and the third connecting hole 681 respectively, and then the ink in the first flow channel 66 and the second flow channel 68 enters the control cavity 5, realizing bidirectional ink replenishment in the control cavity 5. Then the ink in the control cavity 5 enters the replenishment groove 61 through the control cavity hole 57, and the ink in the replenishment groove 61 enters the second printing groove 67 through the second connecting hole 671. Then the ink in the second printing groove 67 enters the placement groove 65, and the ink penetrates the filter screen 64 and enters the groove 62. At this time, the filter screen 64 filters the ink. Then the ink in the groove 62 enters the first printing groove 63, so that the ink is transported outward through the first printing groove 63 and performs printing.

[0020] The buffer column 631 in the first printing groove 63 has the functions of buffering and adjusting the distribution of ink. After the ink reaches the first printing groove 63, it passes through the buffer column 631. The buffer column 631 changes the ink flow channel, so that the ink flows into the wafer body 31 through the gap above the buffer column 631. When side spraying, the ink is more easily sprayed into the upper part of the wafer body 31, realizing synchronous ink supply of all the spray holes (since the height of the one-inch thermal foaming ink cartridge nozzle is 25.4 mm, which is more than twice the height of the half-inch thermal foaming ink cartridge nozzle 12.7 mm, it is easy to be affected by the gravity of the ink, resulting in the problem that the one-inch thermal foaming ink cartridge is easy to run out of ink when side spraying).

[0021] When the ink in the replenishment groove 61, the second printing groove 67 and the groove 62 is gradually consumed and reaches the balance point, the ink pressure in the control cavity 5 is greater than that in the replenishment groove 61 at this time. The sealing rubber 54 and the inner bottom of the control cavity 5 are tightly attached to each other, thereby blocking the control cavity hole 57. When the ink in the replenishment groove 61, the second printing groove 67 and the groove 62 is gradually consumed and reaches the balance point, the ink pressure in the control cavity 5 is less than that in the replenishment groove 61 at this time. The second composite film 7 at the lower end of the replenishment groove 61 is pushed upward by the negative pressure in the replenishment groove 61, thereby exerting an upward pushing force on the second end cover 55; At the same time, the T-shaped movable valve 51 moves upward, thereby moving the sealing rubber 54 upward and separating the sealing rubber 54 from the inner bottom of the control cavity 5. At this time, the ink in the control cavity 5 enters the replenishment groove 61 through the control cavity hole 57, and the replenishment groove 61, the second printing groove 67 and the groove 62 are filled with ink again. After filling, the ink pressure in the control cavity 5 is greater than that in the replenishment groove 61 at this time. With the assistance of the first elastic member 52 and the second elastic member 56, the sealing rubber 54 and the inner bottom of the control cavity 5 are tightly attached to each other again, thereby blocking the control cavity hole 57 again; The ink in the replenishing groove 61 is self-adaptively replenished, so as to ensure that the replenishing groove 61, the second printing groove 67, the recess 62 and the first printing groove 63 are in a constant ink capacity state for a long time, so as to effectively ensure sufficient and smooth ink supply and improve the printing speed and efficiency. The replenishing groove 61, the second printing groove 67, the placing groove 65, the recess 62 and the first printing groove 63 become an independent negative pressure constant closed area, and the ink content in this area is small, so that the opening and closing of the control member is isolated from the ink in the ink storage cavity and is not affected by the gravity or pressure of the ink in the ink storage cavity, so as to effectively reduce the probability of ink leakage (the current hot foaming ink cartridge uses a spring piece mode and is prone to ink leakage).

[0022] After the ink injection hole 11 is sealed by the steel ball, the ink storage cavity, the first flow channel 66, the second flow channel 68 and the control cavity 5 become another independent negative pressure constant closed area, and the ink in the control cavity 5 is isolated from the ink in the replenishing groove 61, the second printing groove 67, the placing groove 65, the recess 62 and the first printing groove 63 through the opening and closing of the control member.

[0023] Meanwhile, under the negative pressure constant state, in cooperation with the ink storage cavity, the control cavity 5, the control cavity hole 57, the replenishing groove 61, the second printing groove 67 and the recess 62, the use capacity of the ink is greatly improved and the production cost is reduced (up to 150 milliliters of ink can be accommodated, which is 3.19 times the capacity of the current hot foaming ink cartridge, and the current hot foaming ink cartridge uses a spring piece mode, and the ink storage capacity of the ink cartridge exceeds 45ML, which is prone to ink leakage). Meanwhile, under the negative pressure constant state, in cooperation with the first flow channel 66, the first connecting hole 661, the second flow channel 68 and the third connecting hole 681, the ink in the ink storage cavity can effectively enter the space such as the replenishing groove 61, and the volume of the space such as the replenishing groove 61 is small, which can not only ensure sufficient and smooth ink supply, but also enable the residual ink to be concentrated in the space such as the replenishing groove 61, and meanwhile, in cooperation with the first composite film 4 and the second composite film 7 through the stretching process to increase the area, under the effect of the profile recombination of the inner frame 9 after shrinkage, the residual amount of the ink in the ink storage cavity and other spaces is effectively reduced (the residual amount of the ink accounts for 5%-10% of the total, while the residual amount of the ink of the current hot foaming ink cartridge accounts for 15%-20% of the total).

[0024] Embodiment two: as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 13 , Figure 14 , Figure 15 , Figure 16 and Figure 17As shown, the COT circuit board upper half 3 is installed on the front end of the outer frame 1, a protection diode can be added in the driving circuit of the wafer body 31, effectively avoiding the burning of the nozzle caused by static electricity or plugging operation, etc., and improving the service life. The wafer body 31 is provided with a nozzle structure at the front end, and the nozzle structure is composed of a plurality of nozzles. The cross section of the nozzle is in a tapered shape with a narrow front and a wide rear. The first printing slot 63 passes through the outer frame 1 and is in communication with the wafer body 31. Ink is sprayed outward through the nozzle. The number of nozzles in the nozzle structure can be 330 nozzles, which are arranged in 22 columns and 15 rows per column (30 more than the traditional one-inch thermal foaming ink cartridge with 300 nozzles, increasing the printing height by 10%). A plurality of heating resistors are arranged in the plurality of nozzles, and the heating resistors are electrically connected with the driving circuit of the wafer body 31. The heating resistors heat the ink in the nozzles for thermal foaming treatment. A plurality of thermistors are installed on the COT circuit board upper half 3, and the plurality of thermistors are located outside the wafer body 31. The plurality of thermistors are used in cooperation to detect the temperature on the nozzle structure.

[0025] The COT circuit board lower half 12 is arranged on the left end of the outer frame 1, and the COT circuit board lower half 12 is electrically connected with the COT circuit board upper half 3. The COT circuit board lower half 12 is provided with a storage chip (1KB), a thermistor calibration resistor, and a control interface (52 contacts). The COT circuit board lower half 12 controls the working of the heating resistor, and the storage chip is used to store the ink cartridge factory information, customer unique encrypted ID information, best printing parameter information, and ink cartridge remaining capacity information, etc., to improve the function of the ink cartridge and reduce the interaction difficulty, and to adapt to the modern development needs.

[0026] The thermistor calibration resistor of the COT circuit board lower half 12 is a resistor with a resistance of 335Ω at 32℃, which provides a reference value when calculating the temperature of the thermistor in the wafer body 31.

[0027] The control interface in the COT circuit board lower half 12 is composed of 52 contacts to control the addressing and ignition of the nozzles, and the communication interfaces of the thermistors and the storage chip are led out. The control interface is the interface required for the thermal foaming inkjet printer to select a certain nozzle to spray ink.

[0028] As shown in the figure, Figure 13 The 330 nozzles are divided into 22 columns, and each column has 15 rows. After the control interface of the COT circuit board lower half 12 receives a command, it finds the corresponding nozzle heating resistor through the addressing circuit. The heating resistor quickly heats up to a high temperature of more than 300℃ to generate countless tiny bubbles, and finally forms a large bubble to force the ink droplets to be sprayed from the corresponding nozzle, finally forming patterns, characters, numbers, etc. As shown in the figure,Figure 14 As shown, the spraying of the nozzles is done in columns. Each time a spray is performed, the row number to be sprayed is selected through the row selection contact among the 52 contacts. The selected row contact is pulled up, and then a spray pulse is sent to the designated column contact to achieve the spraying of the specified row nozzle in that column. This cycle is repeated 22 times to complete the spraying of all 22 columns and a total of 330 nozzles. The pulse and amplitude of the column spray signal are the pulse width and voltage value of the ink cartridge spray. At least 10ns time interval should be reserved between the rising edge of the row selection signal and the rising edge of the column pulse, depending on the actual signal quality. like Figure 15 As shown, a protection diode is added to the driving circuit of wafer 31 to prevent the nozzle from burning out due to static electricity or inserting / removing the ink cartridge, which greatly improves the service life of the ink cartridge. like Figure 16 As shown, a thermistor is installed on the upper half 3 of the COT circuit board. When the nozzle is sprayed at high frequency or the ambient temperature is too high, the heat accumulation in the nozzle will affect the spraying energy, resulting in poor printing effect or even burning out the nozzle heating resistor. The thermistor on the upper half 3 of the COT circuit board and the thermistor calibration resistor on the lower half 12 of the COT circuit board are arranged evenly on one side of the wafer 31. Four thermistors are used to measure the temperature change in the printing ink cartridge, and a calibration resistor is provided to improve the measurement accuracy.

[0029] Temperature measurement formula: ; The preheating function is achieved by measuring the ambient temperature using a thermistor. The inkjet nozzles achieve inkjet printing by heating the resistors. Therefore, the inkjet printing effect is affected by the ambient temperature, resulting in poor inkjet printing in low-temperature environments. So, the ambient temperature can be measured using a thermistor. When the ambient temperature is low, a short pulse is sent to the unselected row contacts each time ink is ejected, so that the inactive nozzles are heated but do not eject ink, thereby compensating for the influence of ambient temperature on the ejection energy. like Figure 17 As shown, the nozzle temperature can be measured by a thermistor to achieve automatic adjustment of the ejection voltage. Different types of ink in the cartridge have significantly different optimal printing voltages. Therefore, the nozzle temperature can be measured during the ejection process to determine the optimal printing voltage for the current ink, achieving the principle that ejection energy = ejection voltage. 2 As the jetting energy increases from low to high, the temperature of the nozzle gradually rises. When the jetting energy reaches the minimum jetting energy, the ink begins to be ejected from the nozzle, and the temperature of the nozzle drops significantly. The voltage at this point is the minimum jetting voltage of the ink. The optimal jetting energy of the nozzle is 1.3 times the minimum jetting energy. Formula for calculating optimal injection voltage: ; By measuring the temperature of the nozzle with a thermistor, the voltage is reduced to avoid heat accumulation in the nozzle when the nozzle overheats. When the nozzle is high-frequency jetted or the ambient temperature is too high, heat accumulation in the nozzle can affect the jetting energy, resulting in poor printing results or even burning the nozzle heating resistor. After each jetting is completed, the nozzle temperature can be measured. When the nozzle temperature continues to rise, the jetting voltage is appropriately reduced to reduce heat accumulation in the nozzle. When the nozzle temperature is too low, the reduced voltage is appropriately restored.

[0030] During assembly, the upper half 3 of the COT circuit board containing the wafer body 31 is mounted to the front end of the outer frame 1 using high-temperature resistant corrosion-resistant glue, so that the nozzle structure is in communication with the first printing slot 63, and the nozzle structure and the first printing slot 63 are in a sealed state. Then, the lower half 12 of the COT circuit board is arranged on the outer end of the outer frame 1 using high-temperature resistant corrosion-resistant glue. At this time, the lower half 12 of the COT circuit board and the upper half 3 of the COT circuit board are in electrical connection. Then, the ink injection hole 11 is used to fill the appropriate ink into the space of the ink storage cavity and the control cavity 5 inside the inner frame 9, the lower end of the first composite film 4, the upper end of the second composite film 7, and the outer end of the auxiliary block 6. At this time, the ink enters the nozzle structure of the wafer body 31. Then, the components such as the outer frame 1 are mounted on the thermal foaming inkjet printer. At this time, the control part of the thermal foaming inkjet printer is in a connected state with the multiple control interfaces on the lower half 12 of the COT circuit board. In use, the operator edits the pictures, numbers, characters, etc. needed for printing on the thermal foaming inkjet printer. The thermal foaming inkjet printer is converted into a picture format, the picture format is divided into the required dot matrix rectangles, the coordinates of each column for each printing are analyzed, the signals are transmitted to the control interfaces of the lower half 12 of the COT circuit board, the control interfaces perform addressing circuits, find the corresponding heating resistors, and the corresponding heating resistors work, rapidly heating to a high temperature of more than 300°C to generate countless tiny bubbles, and finally forming large bubbles to force ink droplets to be ejected from the corresponding nozzles, thereby completing the printing job. In this way, different types of pictures, numbers, characters, etc. required by the operator are printed out. During each nozzle printing process, the thermistor can adaptively adjust the voltage to reduce heat accumulation in the nozzle. After each printing is completed, the bubbles can disappear in time, so that the nozzle ink shrinks back, the surface tension generates suction force to fill the ink in the first printing slot 63 into the nozzle structure of the wafer body 31, which is consumed by printing, to ensure that external air is not easily introduced from the nozzle. In a long time of unsealed state, it will not cause the failure of the internal negative pressure balance value of the ink cartridge, thereby solving the problem that the external air of the current thermal foaming ink cartridge is easily introduced from the nozzle, and in a long time of unsealed state, it causes the failure of the internal negative pressure balance value of the ink cartridge, and the ink leaks from the nozzle of the ink cartridge. And the cross section of the nozzle is designed as a cone with a narrow front and a wide back, which can make the ink more concentrated during the process of gasification and spraying in the nozzle, the spraying distance is farther, the spraying quality is better, and the spraying energy is effectively improved, thereby increasing the printing distance and effectively reducing the probability of miscontact between the thermal foaming inkjet printer and the sprayed object (the current thermal foaming ink cartridge uses a cylindrical design for the nozzle, which makes the printing distance within the range of 1-2mm, while the conical nozzle design and the assistance of constant negative pressure make the printing distance reach the range of 5-6mm).

[0031] During each nozzle printing process, a protection diode is added to the driving circuit of the wafer body 31 to prevent the nozzle from burning out due to static electricity or plugging the ink cartridge. During each nozzle printing process, the ambient temperature is measured by four thermistors on the upper half of the COT circuit board 3 and one thermistor calibration resistor on the lower half of the COT circuit board 12 to achieve preheating function. The nozzle realizes inkjet by heating the resistance, so the inkjet effect will be affected by the ambient temperature, resulting in poor inkjet effect in low temperature environment. Therefore, the ambient temperature can be measured by the thermistor, and when the ambient temperature is low, a short pulse is sent to the non-selected column contact to heat the non-working nozzle without inkjet, so as to compensate the influence of ambient temperature on the spraying energy.

[0032] During each nozzle printing process, the temperature of the nozzle area is fed back in time by four thermistors and one thermistor calibration resistor, and the voltage is reduced to avoid heat accumulation in the nozzle. If the thermal foaming inkjet printer does not input accurate voltage and pulse width signal to the lower half of the COT circuit board 12, the thermistors in the upper half of the COT circuit board 3 and the thermistor calibration resistor in the lower half of the COT circuit board 12 measure the temperature of the nozzle to realize automatic adjustment of the spraying voltage and measure the optimal printing voltage of the current ink.

[0033] Example three: as shown in Figures 18-20 A plurality of hollow rods 644 extending to the upper end of the filter screen 64 are installed equidistantly on the lower end of the filter screen 64, which provides a mounting carrier for the circular rod 643 and other components through the hollow rod 644, and two fixed rods 645 located on the lower side of the filter screen 64 are arranged on the front and rear ends of the hollow rod 644 respectively, and the two fixed rods 645 are connected to the front and rear walls of the groove 62 respectively at the outer ends, and the two fixed rods 645 are used in cooperation to increase the installation stability of the hollow rod 644; The round rod 643 penetrating the hollow rod 644 is slidably connected to the upper end of the hollow rod 644, the round rod 643 provides a mounting carrier for the floating ball 641 and other components, and the floating ball 641 attached to the lower end of the hollow rod 644 is mounted on the lower end of the round rod 643, the round rod 643 moves up and down through the floating ball 641, and a plurality of fan blades 642 located on the lower side of the first composite film 4 are equidistantly arranged on the upper end of the round rod 643, the plurality of fan blades 642 are used in cooperation to realize the stirring operation, the spiral groove 646 is formed on the inner wall of the hollow rod 644 and outwardly recessed, the fixed part of the rolling member is mounted on the outer end of the round rod 643, and the rolling part of the rolling member is in rolling connection with the spiral groove 646, the rolling member and the spiral groove 646 are used in cooperation to make the round rod 643 rotate, and the rolling member can be a universal ball 647.

[0034] When the filter screen 64 is blocked due to ink caking and other phenomena, and the ink in the groove 62 is reduced due to consumption in the last time of inkjet printing, the floating ball 641 moves downward, and the round rod 643 moves downward along the hollow rod 644, so that the universal ball 647 moves along the spiral groove 646, and the round rod 643 moves downward while rotating, so that the plurality of fan blades 642 rotate while moving downward, and the ink above the filter screen 64 in the placement groove 65 is stirred to disperse the ink caking, thereby effectively ensuring sufficient and smooth ink supply and improving printing speed and efficiency.

[0035] Although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A continuous jet one-inch industrial cartridge for thermal foaming, characterized by, Include: Inner frame (9); Protective piece, which is provided with an inner frame (9) inside; Auxiliary block (6) installed on the inner wall of the inner frame (9), the upper and lower end faces of the auxiliary block (6) coincide with the upper and lower end faces of the inner frame (9), and the auxiliary block (6) and the inner frame (9) are integrated, the upper end face of the auxiliary block (6) is concave downward to form a control cavity (5); The first composite film (4) is provided on the upper end of the inner frame (9) by increasing the area through the stretching process, and the lower end of the first composite film (4) is connected with the upper end of the auxiliary block (6); The second composite film (7) is installed at the lower end of the inner frame (9) by increasing the area through the stretching process, and the upper end of the second composite film (7) is connected with the lower end of the auxiliary block (6); Control piece arranged in the control cavity (5); The ink replenishing piece is installed on the auxiliary block (6), and the ink replenishing piece is arranged in communication with the control cavity (5); Filter installed on the auxiliary block (6); COT circuit board upper half (3) arranged at the front end of the protective piece, a wafer body (31) and a plurality of thermistors are arranged at the front end of the COT circuit board upper half (3), and the plurality of thermistors are located outside the wafer body (31), the wafer body (31) is provided with a plurality of heating resistors and a plurality of heating resistors; COT circuit board lower half (12) installed at the left end of the protective piece, the COT circuit board lower half (12) is provided with a control interface, a storage chip and a thermosensitive calibration resistor at the front end, and the control interface, the storage chip and the thermosensitive calibration resistor are electrically connected with each other, and the COT circuit board lower half (12) is electrically connected with the COT circuit board upper half (3).

2. The continuous jet one-inch industrial cartridge for heat foaming according to claim 1, characterized in that: The spray hole structure is composed of a plurality of spray holes, and the cross section of the spray hole is arranged in a tapered shape with a narrow front and a wide rear, a plurality of heating resistors are arranged in the plurality of spray holes, a plurality of thermistors are arranged in the wafer body (31), and the heating resistors and the thermistors are electrically connected with each other.

3. The continuous jet one-inch industrial cartridge for heat foaming according to claim 1, wherein: The filter includes a filter screen (64), the upper end face of the auxiliary block (6) is concave downward to form a placing groove (65), the inner bottom end face of the placing groove (65) is concave downward to form a groove (62), the upper end face of the auxiliary block (6) is downward to form a second printing slot (67), and the second printing slot (67) is located at the front side of the control cavity (5), the front end of the second printing slot (67) is in communication with the rear end of the placing groove (65), the inner bottom end face of the second printing slot (67) is concave downward to form a second connecting hole (671), the filter screen (64) is installed in the inner bottom end of the placing groove (65), the inner front wall face of the groove (62) is concave forward to form a first printing slot (63), the first printing slot (63) is provided with a buffer column (631), and the first printing slot (63) penetrates through the protective piece and is in communication with the wafer body (31).

4. The continuous jet one-inch industrial cartridge for heat foaming according to claim 1, wherein: The ink supplementing member comprises a first flow channel (66) and a second flow channel (68), the upper end of the auxiliary block (6) is recessed downward to form the first flow channel (66) and the second flow channel (68), the second flow channel (68) is in the shape of L in cross section, the first flow channel (66) is in communication with the right end of the control cavity (5), and the second flow channel (68) is in communication with the left end of the control cavity (5). The rear end of the auxiliary block (6) is recessed forward to form a third connecting hole (681), the front end of the third connecting hole (681) is in communication with the rear end of the second flow channel (68), the right end of the auxiliary block (6) is recessed leftward to form a first connecting hole (661), and the left end of the first connecting hole (661) is in communication with the right end of the first flow channel (66).

5. The continuous jet one-inch industrial cartridge for thermal foaming according to claim 1, wherein: The control member comprises a first end cover (53), the first end cover (53) is installed in the control cavity (5), the upper end of the first end cover (53) is coincided with the upper end of the auxiliary block (6), the lower end of the first end cover (53) is provided with a first elastic member (52), the lower end of the first elastic member (52) is installed with a T-shaped movable valve (51), the outer end of the vertical cylindrical part of the T-shaped movable valve (51) is sleeved with a sealing rubber (54), the sealing rubber (54) is attached to the inner bottom of the control cavity (5), the inner bottom of the control cavity (5) is recessed downward to form a control cavity hole (57), the control cavity hole (57) is located at the lower end of the sealing rubber (54), the control cavity hole (57) is in the shape of cross, and the control cavity hole (57) is located at the rear side of the second connecting hole (671). The lower end of the auxiliary block (6) is recessed upward to form a supplement groove (61), the upper end of the supplement groove (61) is in communication with the lower end of the control cavity hole (57) and the lower end of the second connecting hole (671) respectively, a second end cover (55) is movably installed in the supplement groove (61), the upper end of the second end cover (55) is provided with a second elastic member (56), the upper end of the second elastic member (56) is connected with the inner top of the supplement groove (61), the lower end of the vertical cylindrical part of the T-shaped movable valve (51) penetrates through the control cavity hole (57) and is connected with the second end cover (55), and the vertical cylindrical part of the T-shaped movable valve (51) is located inside the second elastic member (56).

6. The continuous jet one-inch industrial cartridge for heat foaming according to claim 3, wherein: The protection member comprises an outer frame (1), the inner frame (9) is installed in the inner frame (1), the first protection cover (2) is arranged at the upper end of the outer frame (1), the second protection cover (8) is installed at the lower end of the outer frame (1), the ink injection hole (11) is recessed backward at the front end of the outer frame (1), and the ink injection hole (11) extends to the inner wall of the inner frame (9), the ink injection hole (11) is located at the right side of the auxiliary block (6), the upper half of the COT circuit board (3) is installed at the front end of the outer frame (1), the lower part of the COT circuit board (12) is arranged at the left end of the outer frame (1), and the front end of the first printing slot (63) penetrates through the outer frame (1) and is in communication with the wafer body (31).

7. The continuous jet one-inch industrial cartridge for thermal foaming according to claim 3, wherein: The multiple hollow rods (644) are equidistantly arranged at the lower end of the filter screen (64) and extend to the upper end of the filter screen (64), the front and rear ends of the hollow rods (644) are provided with fixed rods (645), the two fixed rods (645) are connected to the front and rear walls of the groove (62) respectively, the fixed rods (645) are located at the lower side of the filter screen (64), the upper end of the hollow rod (644) is slidably connected with a round rod (643), and the lower end of the round rod (643) penetrates the hollow rod (644); The lower end of the round rod (643) is provided with a floating ball (641), and the floating ball (641) is attached to the lower end of the hollow rod (644), the upper end of the round rod (643) is provided with multiple fan blades (642) equidistantly, and the fan blades (642) are located at the lower side of the first composite film (4), the inner wall of the hollow rod (644) is outwardly recessed to form a spiral groove (646), and the outer end of the round rod (643) is provided with a rolling member, and the rolling part of the rolling member is in rolling connection with the spiral groove (646).

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