Jet printing process for surface of rubber tube

Abstract

The invention discloses a rubber tube surface jet printing process, which belongs to the field of rubber tube production, and comprises the following steps: a rubber tube passes through a plasma surface processor, a first ink-jet printer, a second ink-jet printer and a dryer in sequence to complete surface jet printing treatment of the rubber tube, the plasma surface processor, the first ink-jet printer, the second ink-jet printer and the dryer are sequentially arranged in the axial direction of the rubber pipe. The plasma surface processor is adopted for conducting plasma cleaning on the surface of the rubber tube, impurities on the surface of the rubber tube can be removed through plasma cleaning, polar groups are attached to the surface of the rubber tube, the free energy of the surface of the rubber tube is improved, and the adhesive force of ink on the surface of the rubber tube can be remarkably improved; and secondly, a protective coating is sprayed on the outer part of the printing ink mark, and the protective coating plays roles of water resistance, oil resistance, fouling resistance, corrosion resistance and the like on the printing ink mark, so that the stability of the printing ink in a use environment is improved under the condition that the marking effect of the printing ink mark is not influenced.

Description

Technical Field

[0001] The invention belongs to the field of hose production and relates to a spray printing process on the surface of a hose. Background Art

[0002] Hose surface printing is an important identification technology, which is widely used in various hose products to improve product traceability and safety. The printing content includes manufacturer information (such as name, address), product specifications (such as diameter, length, material, etc.) and production batch number or serial number.

[0003] Hose surface printing is to use ink to print the above-mentioned printing content on the hose surface. The logo printed by ink is easily affected by gasoline, alcohol, and water mist in the hose use environment, causing the logo to fall off, fade, etc. Summary of the invention

[0004] The purpose of the present invention is to provide a printing process for the surface of a hose, which solves the problem that when the hose is currently printed with ink, the printed logo is prone to fall off and fade under the use environment.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A printing process for the surface of a hose, comprising the following steps: the hose passes through a plasma surface processor, a first inkjet printer, a second inkjet printer, and a dryer in sequence to complete the surface printing process of the hose, wherein the plasma surface processor, the first inkjet printer, the second inkjet printer, and the dryer are arranged in sequence along the axial direction of the hose;

[0007] Among them, the plasma surface processor performs plasma cleaning on the surface of the hose, and polar groups are attached to the surface of the hose; under the action of the first inkjet printer, the hose after plasma cleaning is printed with polyurethane resin ink; the second inkjet printer is used to spray a protective coating on the printing area on the surface of the hose; finally, the dryer dries the surface of the hose to complete the printing process on the surface of the hose.

[0008] The present invention first uses a plasma surface processor to plasma clean the surface of the hose. Plasma cleaning can remove impurities on the surface of the hose and attach polar groups to the surface of the hose, thereby increasing the surface free energy of the hose and significantly improving the adhesion of the ink on the surface of the hose. Secondly, the present invention sprays a protective coating on the outside of the ink mark. The protective coating has waterproof, oil-proof, anti-fouling, and anti-corrosion effects on the ink mark. Without affecting the marking effect of the ink mark, the stability of the ink in the use environment is improved, and it is not easy to fall off or fade.

[0009] Furthermore, the plasma surface processor comprises a horizontally placed conveyor, a plasma nozzle is arranged above the upper conveying surface of the conveyor, the plasma nozzle is connected to a plasma generator, and the plasma nozzle is fixedly connected to a frame of the conveyor.

[0010] Furthermore, the first inkjet printer has the same structure as the second inkjet printer;

[0011] The first inkjet printer includes a horizontally placed bottom plate, two nozzles arranged opposite to each other are arranged above the bottom plate, a gap is left between the two nozzles for the hose to pass through, the two nozzles are arranged in a row along the horizontal radial direction of the hose, transmission wheels are arranged on both sides of the nozzles, the transmission wheels on both sides of the nozzles are arranged one by one along the axial direction of the hose, the transmission wheels on both sides of the nozzles cooperate with the hose to transmit, and the nozzles on both sides of the hose print on the surface of the hose;

[0012] The rubber hose moves along the upper conveying surface of the conveyor, the conveying wheel of the first inkjet printer and the conveying wheel of the second inkjet printer.

[0013] Furthermore, the polyurethane resin ink comprises the following components: 100 parts of polyurethane resin, 30-32 parts of hyperbranched polymer modified epoxy resin, 5-6 parts of pigment, 5-6 parts of silane coupling agent, and 3-4 parts of gemini surfactant.

[0014] The polar groups in the polyurethane ink of the present invention can form a strong interaction with the polar groups on the surface of the hose, so that the polyurethane ink is firmly bonded to the hose surface; the hyperbranched polymer-modified epoxy resin is added to the polyurethane ink of the present invention, which can not only improve the mechanical strength of the ink after curing, but also increase the types and number of functional groups in the ink. The functional groups in the ink and the polar groups on the surface of the hose can form a variety of chemical bonds, further improving the bonding strength between the ink and the hose surface.

[0015] Furthermore, the protective coating comprises the following components in parts by weight: 100 parts of polymethyl methacrylate, 20 parts of transparent polytetrafluoroethylene, 2-3 parts of isophorone diamine, and 10 parts of polyurethane-modified epoxy resin.

[0016] The protective coating of the present invention has high barrier properties, water resistance and oil resistance, and has high bonding strength with the ink. The protective coating of the present invention can provide good protection for the ink marking on the surface of the hose.

[0017] Furthermore, the hyperbranched polymer modified epoxy resin includes hyperbranched epoxy resin HyPer E102 and hyperbranched epoxy resin HyPer E40, and the mass ratio of the hyperbranched epoxy resin HyPer E102 to the hyperbranched epoxy resin HyPer E40 is 2:1.

[0018] Furthermore, the silane coupling agent is vinyl tri-tert-butyl peroxide silane.

[0019] Furthermore, the conveyor is a belt conveyor.

[0020] Furthermore, the gap between the outer wall of the hose and the nozzles on both sides is 2 mm.

[0021] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0022] 1. The present invention uses a plasma surface processor to perform plasma cleaning on the surface of the hose. Plasma cleaning can remove impurities on the surface of the hose and attach polar groups to the surface of the hose, thereby increasing the free energy of the hose surface and significantly improving the adhesion of the ink on the hose surface.

[0023] 2. The present invention sprays a protective coating on the outside of the ink mark, which has the effects of waterproofing, oil-proofing, anti-fouling, and anti-corrosion on the ink mark. Without affecting the marking function of the ink mark, the protective coating improves the stability of the ink in the use environment and is not prone to falling off or fading. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be regarded as limiting the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative work, among which:

[0025] Figure 1 It is a schematic diagram of the structure of the equipment used in the present invention;

[0026] Figure 2 It is a structural schematic diagram of the inkjet printer of the present invention;

[0027] Markings in the figure: 1- conveyor, 2- plasma nozzle, 3- hose, 4- bottom plate, 5- nozzle, 6- conveyor wheel. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the embodiments described are only part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0030] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0031] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0032] Example 1

[0033] A preferred embodiment of the present invention provides a printing process for the surface of a hose, comprising the following steps: the hose 3 passes through a plasma surface processor, a first inkjet printer, a second inkjet printer, and a dryer in sequence to complete the surface printing process of the hose 3, wherein the plasma surface processor, the first inkjet printer, the second inkjet printer, and the dryer are arranged in sequence along the axial direction of the hose 3;

[0034] Among them, the plasma surface processor performs plasma cleaning on the surface of the hose 3, and polar groups are attached to the surface of the hose 3; under the action of the first inkjet printer, the hose 3 after plasma cleaning is printed with polyurethane resin ink; the second inkjet printer is used to spray a protective coating on the printing area on the surface of the hose 3; finally, the dryer dries the surface of the hose 3 to complete the printing process on the surface of the hose 3.

[0035] Furthermore, the plasma surface processor comprises a horizontally placed conveyor 1 , a plasma nozzle 2 is arranged above the upper conveying surface of the conveyor 1 , the plasma nozzle 2 is connected to a plasma generator, and the plasma nozzle 2 is fixedly connected to a frame of the conveyor 1 .

[0036] Furthermore, the first inkjet printer has the same structure as the second inkjet printer;

[0037] The first inkjet printer comprises a horizontally placed bottom plate 4, two oppositely arranged nozzles 5 are arranged above the bottom plate 4, a gap is left between the two nozzles 5 for the hose 3 to pass through, the two nozzles 5 are arranged in a row along the horizontal radial direction of the hose 3, transmission wheels 6 are arranged on both sides of the nozzles 5, the transmission wheels 6 on both sides of the nozzles 5 are arranged one by one along the axial direction of the hose 3, the transmission wheels 6 on both sides of the nozzles 5 cooperate to transmit the hose 3, and the nozzles 5 on both sides of the hose 3 print on the surface of the hose;

[0038] The rubber hose 3 moves along the upper conveying surface of the conveyor 1, the conveying wheel 6 of the first inkjet printer and the conveying wheel 6 of the second inkjet printer.

[0039] Furthermore, the polyurethane resin ink comprises the following components: 100 parts of polyurethane resin, 30-32 parts of hyperbranched polymer modified epoxy resin, 5-6 parts of pigment, 5-6 parts of silane coupling agent, and 3-4 parts of gemini surfactant.

[0040] Furthermore, the protective coating comprises the following components in parts by weight: 100 parts of polymethyl methacrylate, 20 parts of transparent polytetrafluoroethylene, 2-3 parts of isophorone diamine, and 10 parts of polyurethane-modified epoxy resin.

[0041] Furthermore, the hyperbranched polymer modified epoxy resin includes hyperbranched epoxy resin HyPer E102 and hyperbranched epoxy resin HyPer E40, and the mass ratio of the hyperbranched epoxy resin HyPer E102 to the hyperbranched epoxy resin HyPer E40 is 2:1.

[0042] Furthermore, the silane coupling agent is vinyl tri-tert-butyl peroxide silane.

[0043] Furthermore, the conveyor 1 is a belt conveyor.

[0044] Furthermore, the gap between the outer wall of the hose 3 and the nozzles 5 on both sides is 2 mm.

[0045] The present invention first uses a plasma surface processor to plasma clean the surface of the hose. Plasma cleaning can remove impurities on the surface of the hose and attach polar groups to the surface of the hose, thereby increasing the surface free energy of the hose and significantly improving the adhesion of the ink on the surface of the hose. Secondly, the present invention sprays a protective coating on the outside of the ink mark. The protective coating has waterproof, oil-proof, anti-fouling, and anti-corrosion effects on the ink mark. Without affecting the marking effect of the ink mark, the stability of the ink in the use environment is improved, and it is not easy to fall off or fade.

[0046] The printed hose of the present invention is placed in a salt spray test chamber, and a 5% sodium chloride (NaCl) solution is continuously sprayed on the printed area of ​​the hose for 7 days, and no shedding, fading, etc. will occur. In addition, the printed area of ​​the printed hose of the present invention also has good wear resistance and acid and alkali resistance.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions and improvements made by any technician familiar with the field within the spirit and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A printing process for a hose surface, characterized in that: The following steps are involved: The rubber hose (3) is sequentially passed through a plasma surface treatment device, a first inkjet printer, a second inkjet printer, and a drying machine to complete the surface printing treatment of the rubber hose (3), wherein the plasma surface treatment device, the first inkjet printer, the second inkjet printer, and the drying machine are sequentially arranged along the axial direction of the rubber hose (3); The plasma surface processor performs plasma cleaning on the surface of the hose (3), and polar groups are attached to the surface of the hose (3); under the action of the first inkjet printer, the hose (3) after plasma cleaning is spray-printed using polyurethane resin ink; the second inkjet printer is used to spray a protective coating on the spray-printed area on the surface of the hose (3); and finally, the dryer dries the surface of the hose (3), thereby completing the spray-printing process on the surface of the hose (3).

2. The printing process for the hose surface according to claim 1, characterized in that: The plasma surface processor comprises a horizontally placed conveyor (1), a plasma nozzle (2) being arranged above the upper conveying surface of the conveyor (1), the plasma nozzle (2) being connected to a plasma generator, and the plasma nozzle (2) being fixedly connected to a frame of the conveyor (1).

3. The printing process for the hose surface according to claim 2, characterized in that: The first inkjet printer has the same structure as the second inkjet printer; The first inkjet printer comprises a horizontally placed bottom plate (4), two nozzles (5) arranged opposite to each other are arranged above the bottom plate (4), a gap is left between the two nozzles (5) for the rubber hose (3) to pass through, the two nozzles (5) are arranged in a row along the horizontal radial direction of the rubber hose (3), transmission wheels (6) are arranged on both sides of the nozzle (5), the transmission wheels (6) on both sides of the nozzle (5) are arranged one by one along the axial direction of the rubber hose (3), the transmission wheels (6) on both sides of the nozzle (5) cooperate with the rubber hose (3), and the nozzles (5) on both sides of the rubber hose (3) print on the surface of the rubber hose; The rubber hose (3) moves along the upper conveying surface of the conveyor (1), the conveying wheel (6) of the first inkjet printer, and the conveying wheel (6) of the second inkjet printer.

4. The printing process for the hose surface according to claim 1, characterized in that: The polyurethane resin ink comprises the following components: 100 parts of polyurethane resin, 30-32 parts of hyperbranched polymer modified epoxy resin, 5-6 parts of pigment, 5-6 parts of silane coupling agent and 3-4 parts of gemini surfactant.

5. The printing process for the hose surface according to claim 1, characterized in that: The protective coating comprises the following components in parts by weight: 100 parts of polymethyl methacrylate, 20 parts of transparent polytetrafluoroethylene, 2-3 parts of isophorone diamine, and 10 parts of polyurethane-modified epoxy resin.

6. The printing process for the hose surface according to claim 4, characterized in that: The hyperbranched polymer modified epoxy resin includes hyperbranched epoxy resin HyPer E102 and hyperbranched epoxy resin HyPer E40, and the mass ratio of the hyperbranched epoxy resin HyPer E102 to the hyperbranched epoxy resin HyPer E40 is 2:

1.

7. The printing process for the hose surface according to claim 4, characterized in that: The silane coupling agent is vinyl tri-tert-butyl peroxysilane.

8. The printing process for the hose surface according to claim 2, characterized in that: The conveyor (1) is a belt conveyor.

9. The printing process for the hose surface according to claim 3, characterized in that: The gap between the outer wall of the hose (3) and the nozzles (5) on both sides is 2 mm.

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