阅读说明：本技术 一种用于高频热和头上的陶瓷复合材料 (Ceramic composite material for high-frequency heating and head heating ) 是由 李姚 魏金武 于 2021-07-28 设计创作，主要内容包括：本发明提供的一种用于高频热和头上的陶瓷复合材料,包括基体和热合影响区界面结构；所述基体为一体化结构,表面设置有凹槽；所述热合影响区界面结构通过化学或物理方式固定在凹槽内,表面与基体表面在同一水平面。该热合头是在一体成型的热合头基体开设凹槽,通过物理或化学的方式在凹槽内设置一层多界面的热合影响区界面结构,该结构的结合性能好,表面为陶瓷涂层,硬度大高于6GPa,且能够做到完全抗氧化,同时,能够实现良好的热合性能。本发明的适应领域广,可以根据开设凹槽的位置进行喷涂不同位置及宽度的热合影响区界面结构,做到兼容性好。(The invention provides a ceramic composite material for high-frequency heat and head, which comprises a substrate and a heat seal influence area interface structure; the substrate is of an integrated structure, and a groove is formed in the surface of the substrate; the interface structure of the heat seal affected zone is fixed in the groove in a chemical or physical mode, and the surface of the matrix are in the same horizontal plane. The heat seal head is characterized in that a groove is formed in an integrally formed heat seal head base body, a multi-interface heat seal influence area interface structure is arranged in the groove in a physical or chemical mode, the structure is good in bonding performance, the surface of the structure is a ceramic coating, the hardness of the structure is higher than 6GPa, complete oxidation resistance can be achieved, and meanwhile, good heat seal performance can be achieved. The invention has wide application field, can spray the interface structures of the heat seal affected zone with different positions and widths according to the positions of the grooves, and has good compatibility.)

1. A ceramic composite material for high frequency thermal and head applications, comprising: comprises a substrate (1) and a heat seal affected zone interface structure (2); the substrate (1) is of an integrated structure, and a groove is formed in the surface of the substrate; the interface structure (2) of the heat seal affected zone is fixed in the groove in a chemical or physical mode, and the surface of the interface structure and the surface of the substrate (1) are in the same horizontal plane.

2. The ceramic composite material for high frequency heat and head as set forth in claim 1, wherein: the substrate (1) is H65 brass; the heat seal affected zone interface structure (2) comprises a bottom coating structure and a top coating structure; the bottom coating is a NiCo alloy system, the top coating is a SiC ceramic system, and the thickness of the bottom coating is 200-280 mu m.

3. The ceramic composite material for high frequency heat and head as set forth in claim 1, wherein: the substrate (1) is H65 brass; the heat seal affected zone interface structure (2) comprises a bottom coating and a composite structure of multiple coatings; the bottom coating is a NiCo alloy system, the composite structure is a multilayer SiC ceramic system composite structure, wherein the composite structure is gradually decreased according to the thickness of each layer of coating structure from bottom to top in an arithmetic progression, and the gradually decreased tolerance is 50-100 mu m.

4. A ceramic composite material for high frequency heat and head according to claim 2 or 3, characterized in that: the bottom coating comprises the following components in percentage by mass: the balance being Ni, Co: 10-25; cu: 3-7; zn: 1-5; cs: 0 to 1; y: 0-1.

5. The ceramic composite material for high frequency heat and head as set forth in claim 4, wherein: the NiCo alloy system of the bottom coating is as follows: ni-12Co-4Cu-3Zn-0.1 Cs-0.5Y.

6. A ceramic composite material for high frequency heat and head according to claim 2 or 3, characterized in that: the bottom coating comprises the following components in percentage by mass: before the bottom coating is fixed on the substrate (1), a layer of adhesive is required to be coated on the surface of the substrate (1), the adhesive comprises polyethylene glycol with the average molecular weight of 1500-2000 and chitosan-coated nano-silver particles with the average molecular weight of 500-10000, wherein the chitosan-coated nano-silver particles account for 1-10% of the volume ratio of the adhesive.

7. A ceramic composite material for high frequency heat and head according to claim 2 or 3, characterized in that: the SiC ceramic system comprises the following components in percentage by mass: the balance being SiC, ZrO₂：10-15；Y₂O₃：1-10。

8. The ceramic composite material for high frequency heat and head as set forth in claim 3, wherein: and a connecting agent is coated between the two adjacent SiC ceramic system composite structures, and the connecting agent is polyethylene glycol with the average molecular weight of 1500-2000.

Technical Field

The invention belongs to the technical field of ceramic coatings of heat sealing heads, and particularly relates to a ceramic composite material for high-frequency heat sealing heads.

Background

At present, in clinical practice, units such as hospitals, blood stations, biological products and the like store blood and plasma by using special plastic soft bags for conveying and collecting blood and plasma, PVC blood conveying tubes are connected to the special plastic soft bags for plasma, and the blood and the plasma enter the soft bags through the blood conveying tubes or flow out of the soft bags. After the blood or the blood plasma enters the soft bag, the PVC blood transfusion tube is sealed by a heat sealing machine.

The heat seal working end of the heat sealing machine is a pair of heat seal heads which are contacted, an object to be heat sealed is placed in the middle, and the heat seal sealing of the object is realized by heating, but when the existing heat sealing machine is used for sealing the blood bag by the heat sealing machine, the problem that the heat sealing speed is low and the efficiency is low due to improper control of heat sealing time is often encountered, when heat sealing widths of different specifications are encountered, the width of a heat sealing surface of the heat sealing machine cannot be adjusted, on one hand, the compatibility of a heat sealing object is poor, and on the other hand, the problems that the automatic adjustment heat sealing power performance of the heat sealing machine is poor and the adaptability is poor are solved. When the heat seal speed is increased, various problems that the heat seal joint part is not tight and the like are easy to occur, how to solve the problems that the control of conveniently and accurately sealing the heat seal time and the consumption of the heat seal machine are caused every time when the heat seal machine is sealed once, and the heat seal head breaks down, the whole replacement is needed at present, the standby time is long, the production cost is high, and the problem that needs to be solved urgently is formed in the field.

Disclosure of Invention

The technical scheme is as follows: in order to solve the technical problem, the invention improves the material of the heat seal head, and compared with the conventional method, the middle position of the heat seal head is sprayed with a layer of coating, and the contact surface structure of the heat seal head during heat seal is as follows: the two sides of the middle ceramic coating are made of brass, the heat sealing temperature realizes step contact, and a good heat sealing effect can be obtained

Comprises a substrate and a heat seal affected zone interface structure; the substrate is of an integrated structure, and a groove is formed in the surface of the substrate; the interface structure of the heat seal affected zone is fixed in the groove in a chemical or physical mode, and the surface of the matrix are in the same horizontal plane.

As a refinement, the substrate is H65 brass; the interface structure of the heat seal affected zone comprises a bottom coating structure and a top coating structure; the bottom coating is a NiCo alloy system, the top coating is a SiC ceramic system, and the thickness of the bottom coating is 200-280 mu m.

As a refinement, the substrate is H65 brass; the interface structure of the heat seal affected zone comprises a bottom coating and a composite structure of multiple coatings; the bottom coating is a NiCo alloy system, the composite structure is a multilayer SiC ceramic system composite structure, wherein the composite structure is gradually decreased according to the thickness of each layer of coating structure from bottom to top in an arithmetic progression, and the gradually decreased tolerance is 50-100 mu m.

As an improvement, the bottom coating comprises the following components in percentage by mass: the balance being Ni, Co: 10-25; cu: 3-7; zn: 1-5; cs: 0 to 1; y: 0-1.

As an improvement, the NiCo alloy system of the bottom coating is as follows: ni-12Co-4Cu-3Zn-0.1 Cs-0.5Y.

As an improvement, the bottom coating comprises the following components in percentage by mass: before the bottom coating is fixed on the substrate (1), a layer of adhesive is required to be coated on the surface of the substrate (1), the adhesive comprises polyethylene glycol with the average molecular weight of 1500-2000 and chitosan-coated nano-silver particles with the average molecular weight of 500-10000, wherein the chitosan-coated nano-silver particles account for 1-10% of the volume ratio of the adhesive.

As an improvement, the SiC ceramic system comprises the following components in percentage by mass: the balance being SiC, ZrO₂：10-15；Y₂O₃：1-10。

As an improvement, a connecting agent is coated between two adjacent SiC ceramic system composite structures, and the connecting agent is polyethylene glycol with the average molecular weight of 1500-2000.

Has the advantages that: the ceramic composite material for high-frequency heating and heat sealing is characterized in that a groove is formed in an integrally formed heat sealing head base body, a multi-interface heat sealing influence area interface structure is arranged in the groove in a physical or chemical mode, the structure is good in combination performance, the surface of the structure is provided with a ceramic coating, the hardness of the structure is higher than 6GPa, the structure can be completely resistant to oxidation, and meanwhile, good heat sealing performance can be achieved. The invention has wide application field, can spray the interface structures of the heat seal affected zone with different positions and widths according to the positions of the grooves, and has good compatibility.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

FIG. 2 is a schematic diagram showing the structure of the blood bag of the present invention.

In the figure: base member 1, heat seal affected zone interface structure 2.

Detailed Description

The following examples are given to further illustrate the embodiments of the present invention. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

A ceramic composite material for high frequency thermal and head applications, comprising a substrate 1 and a thermal sealing affected zone interface structure 2; the substrate 1 is of an integrated structure, and the surface of the substrate is provided with a groove; the interface structure 2 of the heat seal affected zone is fixed in the groove in a chemical or physical mode, and the surface of the substrate are in the same level. Alternatively, the heat seal affected zone interface structure 2 is provided on the substrate 1 by means of plasma spraying, explosion spraying or the like.

As a specific embodiment of the present invention, the substrate is H65 brass; the interface structure of the heat seal affected zone comprises a bottom coating structure and a top coating structure; the bottom coating is a NiCo alloy system, the top coating is a SiC ceramic system, and the thickness of the bottom coating is 200-280 mu m. The top coating was 300 and 900 μm.

As a specific embodiment of the present invention, the substrate is H65 brass; the interface structure of the heat seal affected zone comprises a bottom coating and a composite structure of multiple coatings; the bottom coating is a NiCo alloy system, the composite structure is a multilayer SiC ceramic system composite structure, wherein the composite structure is gradually decreased according to the thickness of each layer of coating structure from bottom to top in an arithmetic progression, and the gradually decreased tolerance is 50-100 mu m. The multilayer composite is used for enhancing the binding force of a thermal bonding interface on one hand, and can be recycled for the second time in a repairing mode when damaged, so that the cost is reduced.

The NiCo alloy system comprises the following components in percentage by mass: the balance being Ni, Co: 10-25; cu: 3-7; zn: 1-5; cs: 0 to 1; y: 0-1.

Preferably, the underlying coated NiCo alloy system is: ni-12Co-4Cu-3Zn-0.1 Cs-0.5Y.

The bottom coating comprises the following components in percentage by mass: before the bottom coating is fixed on the substrate (1), a layer of adhesive is required to be coated on the surface of the substrate (1), the adhesive comprises polyethylene glycol with the average molecular weight of 1500-2000 and chitosan-coated nano-silver particles with the average molecular weight of 500-10000, wherein the chitosan-coated nano-silver particles account for 1-10% of the volume ratio of the adhesive.

According to the invention, chitosan with the average molecular weight of 500-10000 of organic matters is adopted to wrap the nano silver to be used as one component in the adhesive, and the nano silver is coated between the bottom coating and the substrate, so that a good adhesive connection effect can be achieved, and meanwhile, the nano silver can be used as a reinforcing phase to be combined with a NiCo alloy system, so that the mechanical property is enhanced.

The SiC ceramic system comprises the following components in percentage by mass: the balance being SiC, ZrO₂：10-15；Y₂O₃：1-10。

And a connecting agent is coated between the two adjacent SiC ceramic system composite structures, and the connecting agent is polyethylene glycol with the average molecular weight of 1500-2000.

After grooving, cleaning oil stain of acetone on a H65 brass substrate, performing sand blasting, controlling the temperature of the substrate at 100-.

The working parameters for controlling the explosion spraying are as follows: o is₂The ejection flow rate of the acetylene and the mixed gas is 0.002-0.01 m³h.L, the spraying distance is 80-200mm, the powder feeding speed is 0.1-0.7 g/s, and the diameter of the blast hole is 20-24 mm.

The heat sealing head structure is installed on a heat sealing machine in practical application, when the heat sealing head structure works as the heat sealing head, a high-frequency electric field is applied to a workpiece to be heat sealed in the electric field, for example, a blood bag of which the workpiece is made of plastic material, so that the workpiece generates a molecular polarization phenomenon, and the polarized molecules are arranged forcibly according to the direction of the electric field. The molecules can follow the change at the same extremely fast speed by the rapid change of the high-frequency electric field, so that the dielectric material generates a large amount of heat due to dielectric loss, the heat is accumulated and accumulated to form very high temperature, and finally the high-temperature heat is melted to obtain excellent effect, as shown in figure 2, the heat sealing interface is clear and uniform, and the heat sealing effect is good.

The technical contents of the present invention will be further described below with specific examples.

Example 1

The coating comprises a two-layer structure, wherein the first layer is a NiCo alloy system, the second layer is a SiC ceramic system, the thickness of the first layer is 200 mu m, and the top coating is 600 mu m. The first layer comprises the following specific components in percentage by mass: the balance being Ni, Co: 10; cu: 3; zn: 1; cs: 0.2; y: 0.5. the SiC ceramic system comprises the following components in percentage by mass: the balance being SiC, ZrO₂：15；Y₂O₃：1。

Example 2

The coating comprises a two-layer structure, wherein the first layer is a NiCo alloy system, the second layer is a SiC ceramic system, the thickness of the first layer is 280 mu m, and the top coating is 900 mu m.

The invention specifically comprises the following components in percentage by mass: the balance being Ni, Co: 10; cu: 3; zn: 1; cs: 0.2; y: 0.5. the SiC ceramic system comprises the following components in percentage by mass: the balance being SiC, ZrO₂：12；Y₂O₃：10。

Example 3

The coating comprises a two-layer structure, wherein the first layer is a NiCo alloy system, the second layer is a SiC ceramic system, the thickness of the first layer is 255 mu m, and the top coating is 350 mu m.

The invention specifically comprises the following components in percentage by mass: the balance being Ni, Co: 10; cu: 3; zn: 1; cs: 0.2; y: 0.5. the SiC ceramic system comprises the following components in percentage by mass: the balance being SiC, ZrO₂：10；Y₂O₃：5。

The coating compositions according to examples 1-3 and the thermobonded heads obtained according to the same spray coating process, all tested with a hardness higher than 6GPa, a bond at the interfaceThe strength is 5.67, 9.815 and 12.01N/mm in sequence². Meanwhile, through microscopic interface observation, fracture cracks are all inside the particles of the coating and do not appear on a contact line of the substrate and the coating, and the effect of excellent bonding strength is further verified from the structure.

The SiC ceramic body is a composite structure with a two-layer structure, and specifically comprises the following components: the first layer is a NiCo alloy system with a thickness of 200-280 μm, the second layer is a SiC ceramic system with a thickness of 300-900 μm, and the third layer is a SiC ceramic system with a thickness reduced by 50-100 μm compared with the second layer, as described in example 4 below.

Example 4 balance Ni, Co: 10-25; cu: 3-7; zn: 1-5; cs: 0 to 1; y: 0-1.

The balance being SiC, ZrO₂：10-15；Y₂O₃：1-10

In this embodiment, the thickness of the first layer is 210 μm, the thickness of the second layer is 450 μm, and the thickness of the third layer is 380 μm, wherein the first layer coating specifically comprises, by mass: the balance being Ni, Co: 12; cu: 4; zn: 3; cs: 0.1; y: 0.5. the SiC ceramic systems of the second layer and the third layer are all as follows by mass percent: the balance being SiC, ZrO₂：12；Y₂O₃: 5, only the thickness is different.

The SiC ceramic body is a composite structure with a three-layer structure, and specifically comprises the following components: the first layer is a NiCo alloy system with a thickness of 200-280 μm, the second layer is a SiC ceramic system with a thickness of 300-900 μm, the third layer is a SiC ceramic system, the thickness of the third layer is reduced by 50-100 μm compared with the thickness of the second layer, the fourth layer is a SiC ceramic system, the thickness of the fourth layer is reduced by 50-100 μm compared with the thickness of the third layer, and the following embodiment 5 specifically describes.

Example 5

In this embodiment, the thickness of the first layer is 270 μm, the thickness of the second layer is 900 μm, the thickness of the third layer is 820 μm, and the thickness of the fourth layer is 140 μm, wherein the first layer coating specifically comprises, by mass: the balance being Ni, Co: 10; cu: 3; zn: 3; cs: 0.4; y: 0.6. the SiC ceramic systems of the second layer, the third layer and the fourth layer are all based on massThe percentage is as follows: the balance being SiC, ZrO₂：14；Y₂O₃: 1, only the thickness.

According to the coating compositions of examples 4-5 and the thermal bonding head obtained by the same spraying process, the hardness is higher than 6GPa, and the bonding strength at the interface is 10.43 and 12.41N/mm in sequence². Meanwhile, through microscopic interface observation, fracture cracks are all inside the particles of the coating and do not appear on a contact line of the substrate and the coating, and the effect of excellent bonding strength is further verified from the structure.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.