阅读说明：本技术 复合软管片材成型工艺及复合软管结构 (Composite hose sheet forming process and composite hose structure ) 是由 梁荣标 于 2021-08-02 设计创作，主要内容包括：本发明涉及复合软管片材成型工艺,使用塑料颗粒作为原料,第一塑料颗粒15％—60％,第二塑料颗粒30％—70％,第三塑料颗粒10％—15％。采用如下步骤：塑化：将第一塑料颗粒、第二塑料颗粒和第三塑料颗粒分别加热塑化,并分别输送至分流器；挤出成型：将塑化后的第一塑料颗粒、第二塑料颗粒和第三塑料颗粒由分流器送入模头中,由模头挤出成型,制得复合片材,所述第一塑料颗粒形成片状的第一片材,所述第二塑料颗粒形成片状的第二片材,所述第三塑料颗粒形成片状的第三片材,所述第一片材、第二片材和第三片材经高温互相粘合形成所述复合片材；所述第一片材用于软管的最外层,所述第三片材用于软管的最内层；压制定型。(The invention relates to a composite hose sheet forming process, which uses plastic particles as raw materials, wherein the plastic particles comprise 15-60% of first plastic particles, 30-70% of second plastic particles and 10-15% of third plastic particles. The method comprises the following steps: plasticizing: respectively heating and plasticizing the first plastic particles, the second plastic particles and the third plastic particles, and respectively conveying the first plastic particles, the second plastic particles and the third plastic particles to the flow divider; and (3) extrusion molding: feeding the plasticized first plastic particles, the plasticized second plastic particles and the plasticized third plastic particles into a die head through a flow divider, and extruding and molding the first plastic particles, the plasticized second plastic particles and the plasticized third plastic particles through the die head to obtain a composite sheet material, wherein the first plastic particles form a first sheet material in a sheet shape, the second plastic particles form a second sheet material in a sheet shape, the third plastic particles form a third sheet material in a sheet shape, and the first sheet material, the second sheet material and the third sheet material are mutually bonded at a high temperature to form the composite sheet material; the first sheet is used for the outermost layer of the hose, and the third sheet is used for the innermost layer of the hose; and (6) pressing and shaping.)

1. The composite hose sheet forming process uses plastic particles as raw materials, and comprises first plastic particles, second plastic particles and third plastic particles, wherein the second plastic particles are obtained by smashing plastic waste; the first plastic particles comprise high density polyethylene, the second plastic particles comprise low density polyethylene, and the third plastic particles comprise linear low density polyethylene; the content ratio is as follows by mass:

15 to 60 percent of first plastic particles

30% -70% of second plastic particles

10% -15% of third plastic particles;

the method comprises the following steps:

plasticizing: respectively heating and plasticizing the first plastic particles, the second plastic particles and the third plastic particles, and respectively conveying the first plastic particles, the second plastic particles and the third plastic particles to the flow divider;

and (3) extrusion molding: feeding the plasticized first plastic particles, the plasticized second plastic particles and the plasticized third plastic particles into a die head through a flow divider, and extruding and molding the first plastic particles, the plasticized second plastic particles and the plasticized third plastic particles through the die head to obtain a composite sheet material, wherein the first plastic particles form a first sheet material in a sheet shape, the second plastic particles form a second sheet material in a sheet shape, the third plastic particles form a third sheet material in a sheet shape, and the first sheet material, the second sheet material and the third sheet material are mutually bonded at a high temperature to form the composite sheet material; the first sheet is used for the outermost layer of the hose, and the third sheet is used for the innermost layer of the hose;

pressing and shaping: and pressing the composite sheet, adjusting the thickness of the composite sheet, and cooling and shaping.

2. The composite hose sheet forming process of claim 1, wherein the first plastic particles and the second plastic particles are present in the same amount.

3. The composite hose sheet forming process according to claim 1 or 2, wherein the step of plasticizing further comprises: the method comprises the following steps of conveying first plastic particles, second plastic particles and third plastic particles to a first conveying pipeline, a second conveying pipeline and a third conveying pipeline through a first feeding hopper, a second feeding hopper and a third feeding hopper respectively, heating and melting the first plastic particles, the second plastic particles and the third plastic particles in the first conveying pipeline and the second conveying pipeline respectively, and conveying the first plastic particles, the second plastic particles and the third plastic particles to a flow divider through the first conveying pipeline, the second conveying pipeline and the third conveying pipeline respectively under the action of pressure. The first plastic particles, the second plastic particles and the third plastic particles are heated and melted in the first conveying pipeline, the second conveying pipeline and the third conveying pipeline respectively, are conveyed into the flow divider, and are injected into the die head through the flow divider to be extruded, so that the process is simple, and the time is saved.

4. The composite hose sheet forming process of claim 3, wherein the step of plasticizing further comprises: and electric heating devices are respectively arranged in the first conveying pipeline, the second conveying pipeline and the third conveying pipeline.

5. The composite hose sheet forming process of claim 4, wherein the step of press-setting further comprises: pressing the composite sheet using a press machine. The first sheet, the second sheet and the third sheet of the composite sheet prepared after the press forming can be bonded more tightly and firmly, and the thickness of the composite sheet can be adjusted.

6. The composite hose sheet forming process according to claim 5, further comprising the following steps after cooling and shaping and before the tubing step: printing a surface of the composite sheet.

7. The composite hose sheet forming process of claim 1 or 2, wherein the first, second and third sheets are different in color.

8. A composite hose sheet forming process according to claim 1 or 2, wherein the second sheet is transparent.

9. The process for forming a composite hose sheet according to claim 1 or 2, wherein the second plastic particles are obtained by crushing waste plastic sheets comprising high density polyethylene, low density polyethylene and linear low density polyethylene.

10. A composite hose construction comprising a composite hose sheet formed by the composite hose sheet forming process of any one of claims 1 to 9, said composite hose sheet having three layers welded together by a welding process to form a hose.

Technical Field

The invention belongs to the technical field of hose processing and manufacturing, and particularly relates to a composite hose sheet forming process and a composite hose structure.

Background

The flexible pipe sheet used in the field of daily chemical products for packaging cosmetics, foods, medicines, toothpaste and the like is generally formed by a stamping process, namely, after a plastic sheet is stamped and formed, a plurality of sheets are overlapped up and down to be compounded into a multi-layer sheet, the multi-layer sheet is bonded by adopting an adhesive, and then the multi-layer sheet is made into a tubular shape. And the problem of short service life of the multilayer composite sheet is caused by adopting a chemical bonding mode. Because the package adopts plastics as raw materials, the package is abandoned after using, and mass production and sale result in a large amount of waste plastics, waste is formed, and a subsequent waste material treatment process is also needed, so that the problem that the current environmental protection requirement cannot be well met is solved.

Disclosure of Invention

It is an object of the present invention to overcome at least one of the problems of the background art and to provide a composite hose sheet forming process and a composite hose structure.

The technical scheme of the invention is as follows:

the composite hose sheet forming process uses plastic particles as raw materials, and comprises first plastic particles, second plastic particles and third plastic particles, wherein the second plastic particles are obtained by smashing plastic waste; the first plastic granules comprise High Density Polyethylene (HDPE), the second plastic granules comprise Low Density Polyethylene (LDPE), and the third plastic granules comprise Linear Low Density Polyethylene (LLDPE); the content ratio is as follows by mass:

15 to 60 percent of first plastic particles

30% -70% of second plastic particles

10% -15% of third plastic particles;

the method comprises the following steps:

plasticizing: respectively heating and plasticizing the first plastic particles, the second plastic particles and the third plastic particles, and respectively conveying the first plastic particles, the second plastic particles and the third plastic particles to the flow divider;

and (3) extrusion molding: feeding the plasticized first plastic particles, the plasticized second plastic particles and the plasticized third plastic particles into a die head through a flow divider, and extruding and molding the first plastic particles, the plasticized second plastic particles and the plasticized third plastic particles through the die head to obtain a composite sheet material, wherein the first plastic particles form a first sheet material in a sheet shape, the second plastic particles form a second sheet material in a sheet shape, the third plastic particles form a third sheet material in a sheet shape, and the first sheet material, the second sheet material and the third sheet material are mutually bonded at a high temperature to form the composite sheet material; the first sheet is used for the outermost layer of the hose, and the third sheet is used for the innermost layer of the hose; when the first sheet is used as the outermost layer, enough hardness can be provided, and the printing process is suitable for adjusting printing colors, gold stamping and other processes during printing; and tear strength, which prevents the composite sheet from being stretched in the process of welding to form a hose, and is also beneficial to the alignment operation in printing; the innermost layer can meet the safety requirement of canning toothpaste and the like or food contents, and the welding is tighter and firmer when the tail is sealed after the hose is made; the middle layer has better toughness, prevents cracking, prevents the manufactured hose from bursting at the head and the tail, is made of recycled plastic particles, and saves resources.

Pressing and shaping: and pressing the composite sheet, adjusting the thickness of the composite sheet, and cooling and shaping. The cooled and shaped composite sheet can be shaped into sheet pipes and the like according to various different requirements through a welding process.

In the prior art, plastic is blown into a film, the film is adhered into a sheet by double-layer or multi-layer films, and then the sheet is made into a hose, all the sheets contain a plurality of chemical raw materials such as adhesives, and the like, and the speed is not high, and the color changing time is long. Different from the prior art, the plastic particles which are melted by heat are extruded into the sheet shape which is mutually bonded in the scheme of the invention, the composite sheet can be directly prepared, the use of substances such as bonding agents and the like to bond into a multi-layer structure is avoided, and the adhesive-free composite sheet is safer, cleaner and more environment-friendly and has shorter process period. Preferably, after cooling and shaping, the method further comprises the step of manufacturing a pipe: the composite sheet is welded into a plastic hose by a welding process and then cut into sections. The pressed composite sheet is formed by welding, so that the process for producing the hose is more efficient and labor-saving.

Preferably, the first plastic particles and the second plastic particles are present in the same amount.

Preferably, the step of plasticizing further comprises: the method comprises the following steps of conveying first plastic particles, second plastic particles and third plastic particles to a first conveying pipeline, a second conveying pipeline and a third conveying pipeline through a first feeding hopper, a second feeding hopper and a third feeding hopper respectively, heating and melting the first plastic particles, the second plastic particles and the third plastic particles in the first conveying pipeline and the second conveying pipeline respectively, and conveying the first plastic particles, the second plastic particles and the third plastic particles to a flow divider through the first conveying pipeline, the second conveying pipeline and the third conveying pipeline respectively under the action of pressure. The first plastic particles, the second plastic particles and the third plastic particles are heated and melted in the first conveying pipeline, the second conveying pipeline and the third conveying pipeline respectively, are conveyed into the flow divider, and are injected into the die head through the flow divider to be extruded, so that the process is simple, and the time is saved.

More preferably, the step of plasticizing further comprises: and electric heating devices are respectively arranged in the first conveying pipeline, the second conveying pipeline and the third conveying pipeline.

Preferably, the step of press-setting further comprises: pressing the composite sheet using a press machine. The first sheet, the second sheet and the third sheet of the composite sheet prepared after the pressing and shaping can be bonded more tightly and firmly, and the thickness of the composite sheet can be adjusted.

Preferably, after cooling and shaping and before the tube making step, the method further comprises the following steps: printing a surface of the composite sheet.

Preferably, the colors of the first sheet, the second sheet and the third sheet are different. When the flexible tube with various colors needs to be manufactured, the color changing time is shorter, and the cost is saved.

Preferably, the second sheet is transparent.

Preferably, the second plastic particles are prepared by crushing waste plastic sheets containing high-density polyethylene, low-density polyethylene and linear low-density polyethylene.

The invention also provides a composite hose sheet forming process as another embodiment, which comprises the following production devices:

the extruder comprises a first extruder, a second extruder and a third extruder, wherein the first extruder, the second extruder and the third extruder respectively comprise a first conveying pipeline, a second conveying pipeline, a third conveying pipeline, a first flow divider, a second flow divider and a third flow divider; the first extruder is in communication with the first splitter, the second extruder is in communication with the second splitter, and the third extruder is in communication with the third splitter;

the first flow divider, the second flow divider and the third flow divider are respectively connected with the die head, and the pressure turbine is arranged below the die head;

the method comprises the following steps:

plasticizing: respectively heating and plasticizing the first plastic particles, the second plastic particles and the third plastic particles in the first conveying pipeline, the second conveying pipeline and the third conveying pipeline, and respectively conveying the plastic particles to a first flow divider, a second flow divider and a third flow divider;

and (3) extrusion molding: feeding the plasticized first plastic particles, second plastic particles and third plastic particles into a die head through a first flow divider, a second flow divider and a third flow divider, and extruding and molding the plastic particles and the die head to obtain a composite sheet material, wherein the first plastic particles are used for forming a first sheet material in a sheet shape, the second plastic particles are used for forming a second sheet material in a sheet shape, the third plastic particles are used for forming a third sheet material in a sheet shape, and the first sheet material, the second sheet material and the third sheet material are mutually bonded at high temperature in the die head to form the composite sheet material;

pressing and shaping: and conveying the composite sheet obtained by die head extrusion molding to a lower pressure turbine, pressing the composite sheet by using the pressure turbine, adjusting the thickness of the composite sheet, and cooling and shaping.

The device can greatly reduce manual operation, has a simplified and reasonable structure, does not occupy space, and is favorable for saving process time.

Preferably, the rolling mechanism further comprises a rolling mechanism, a conveying roller is connected between the rolling mechanism and the press wheel, the rolling mechanism is located at the downstream of the press wheel, and the conveying roller conveys the composite sheet to the rolling mechanism to roll and arrange the composite sheet. Meanwhile, the conveying roller is favorable for cooling and shaping the composite sheet.

The invention also provides a composite hose structure which comprises the composite hose sheet prepared by the composite hose sheet molding process, wherein the composite hose sheet is formed by welding the three layers of composite hose sheets into a hose by a welding process, and then cutting the hose into sections to obtain the composite hose structure.

The three-layer hose structure in the prior art is mostly formed by blow molding or formed by fixedly bonding after sleeving a processed hose, and in such a way, a single-layer sheet or pipe is mostly bonded by using an adhesive or the like. And make the compound hose structure of three-layer in this scheme and avoid using the adhesive, avoid polluting contents such as daily chemical articles for use that the hose held, and difficult ageing and the separation of ftractureing.

Detailed Description

The technical solution of the present invention will be described in detail with reference to specific examples.

Example 1

The composite hose sheet forming process uses plastic particles as raw materials, and comprises first plastic particles, second plastic particles and third plastic particles, wherein the second plastic particles are obtained by smashing plastic waste; the first plastic granules comprise High Density Polyethylene (HDPE), the second plastic granules comprise Low Density Polyethylene (LDPE), and the third plastic granules comprise Linear Low Density Polyethylene (LLDPE); the content ratio is as follows by mass:

the first plastic particle is 60%

The second plastic particle is 30%

10% of third plastic particles;

the method comprises the following steps:

plasticizing: respectively heating and plasticizing the first plastic particles, the second plastic particles and the third plastic particles, and respectively conveying the first plastic particles, the second plastic particles and the third plastic particles to the flow divider;

and (3) extrusion molding: feeding the plasticized first plastic particles, the plasticized second plastic particles and the plasticized third plastic particles into a die head through a flow divider, and extruding and molding the first plastic particles, the plasticized second plastic particles and the plasticized third plastic particles through the die head to obtain a composite sheet material, wherein the first plastic particles form a first sheet material in a sheet shape, the second plastic particles form a second sheet material in a sheet shape, the third plastic particles form a third sheet material in a sheet shape, and the first sheet material, the second sheet material and the third sheet material are mutually bonded at a high temperature to form the composite sheet material; the first sheet is used for the outermost layer of the hose, and the third sheet is used for the innermost layer of the hose; when the first sheet is used as the outermost layer, enough hardness can be provided, and the printing process is suitable for adjusting printing colors, gold stamping and other processes during printing; and tear strength, which prevents the composite sheet from being stretched in the process of welding to form a hose, and is also beneficial to the alignment operation in printing; the innermost layer can meet the safety requirement of canning toothpaste and the like or food contents, and the welding is tighter and firmer when the tail is sealed after the hose is made; the middle layer has better toughness, prevents cracking, prevents the manufactured hose from bursting at the head and the tail, is made of recycled plastic particles, and saves resources.

Pressing and shaping: and pressing the composite sheet, adjusting the thickness of the composite sheet, and cooling and shaping. The cooled and shaped composite sheet can be shaped into sheet pipes and the like according to various different requirements through a welding process.

In the prior art, plastic is blown into a film, the film is adhered into a sheet by double-layer or multi-layer films, and then the sheet is made into a hose, all the sheets contain a plurality of chemical raw materials such as adhesives, and the like, and the speed is not high, and the color changing time is long. Different from the prior art, the plastic particles which are melted by heat are extruded into the sheet shape which is mutually bonded in the scheme of the invention, the composite sheet can be directly prepared, the use of substances such as bonding agents and the like to bond into a multi-layer structure is avoided, and the adhesive-free composite sheet is safer, cleaner and more environment-friendly and has shorter process period. After cooling and shaping, the method also comprises the following steps: and welding the composite sheet into a plastic hose by a welding process, and then cutting into sections. The pressed composite sheet is formed by welding, so that the process for producing the hose is more efficient and labor-saving.

The step of plasticizing further comprises: the method comprises the following steps of conveying first plastic particles, second plastic particles and third plastic particles to a first conveying pipeline, a second conveying pipeline and a third conveying pipeline through a first feeding hopper, a second feeding hopper and a third feeding hopper respectively, heating and melting the first plastic particles, the second plastic particles and the third plastic particles in the first conveying pipeline and the second conveying pipeline respectively, and conveying the first plastic particles, the second plastic particles and the third plastic particles to a flow divider through the first conveying pipeline, the second conveying pipeline and the third conveying pipeline respectively under the action of pressure. The first plastic particles, the second plastic particles and the third plastic particles are heated and melted in the first conveying pipeline, the second conveying pipeline and the third conveying pipeline respectively, are conveyed into the flow divider, and are injected into the die head through the flow divider to be extruded, so that the process is simple, and the time is saved.

The step of plasticizing further comprises: and electric heating devices are respectively arranged in the first conveying pipeline, the second conveying pipeline and the third conveying pipeline.

The step of press-setting further comprises: pressing the composite sheet using a press machine. The first sheet, the second sheet and the third sheet of the composite sheet prepared after the press forming can be bonded more tightly and firmly, and the thickness of the composite sheet can be adjusted.

After cooling and shaping and before the step of making the pipe, the method also comprises the following steps: printing a surface of the composite sheet.

The colors of the first sheet material, the second sheet material and the third sheet material are different. When a hose with various colors needs to be manufactured, the color changing time is shorter, and the cost is saved.

The second sheet is transparent.

The second plastic particles are prepared by crushing waste plastic sheets containing high-density polyethylene, low-density polyethylene and linear low-density polyethylene.

The composite hose sheet can be rolled up and welded at two ends and then printed to form the hose.

The composite hose sheet forming process comprises the following production devices:

the extruder comprises a first extruder, a second extruder and a third extruder, wherein the first extruder, the second extruder and the third extruder respectively comprise a first conveying pipeline, a second conveying pipeline, a third conveying pipeline, a first flow divider, a second flow divider and a third flow divider; the first extruder is in communication with the first splitter, the second extruder is in communication with the second splitter, and the third extruder is in communication with the third splitter;

the first flow divider, the second flow divider and the third flow divider are respectively connected with the die head, and the pressure turbine is arranged below the die head;

the method comprises the following steps:

plasticizing: respectively heating and plasticizing the first plastic particles, the second plastic particles and the third plastic particles in the first conveying pipeline, the second conveying pipeline and the third conveying pipeline, and respectively conveying the plastic particles to a first flow divider, a second flow divider and a third flow divider;

and (3) extrusion molding: feeding the plasticized first plastic particles, second plastic particles and third plastic particles into a die head through a first flow divider, a second flow divider and a third flow divider, and extruding and molding the plastic particles and the die head to obtain a composite sheet material, wherein the first plastic particles are used for forming a first sheet material in a sheet shape, the second plastic particles are used for forming a second sheet material in a sheet shape, the third plastic particles are used for forming a third sheet material in a sheet shape, and the first sheet material, the second sheet material and the third sheet material are mutually bonded at high temperature in the die head to form the composite sheet material;

pressing and shaping: and conveying the composite sheet obtained by die head extrusion molding to a lower pressure turbine, pressing the composite sheet by using the pressure turbine, adjusting the thickness of the composite sheet, and cooling and shaping.

The device can greatly reduce manual operation, has a simplified and reasonable structure, does not occupy space, and is favorable for saving process time.

Still include the rolling structure, the rolling structure with be connected with the conveying roller between the pressure turbine, the rolling structure is located the low reaches of pressure turbine, the conveying roller will composite sheet conveys to the rolling structure is to composite sheet rolling arrangement. Meanwhile, the conveying roller is favorable for cooling and shaping the composite sheet.

Example 2

The composite hose sheet forming process uses plastic particles as raw materials, and comprises first plastic particles, second plastic particles and third plastic particles, wherein the second plastic particles are obtained by smashing plastic waste; the first plastic granules comprise High Density Polyethylene (HDPE), the second plastic granules comprise Low Density Polyethylene (LDPE), and the third plastic granules comprise Linear Low Density Polyethylene (LLDPE); the content ratio is as follows by mass:

the first plastic particle is 30%

The second plastic particle is 40%

And 30% of third plastic particles.

The steps and production apparatus used therefor were the same as those of reference 1.

Example 3

The composite hose sheet forming process uses plastic particles as raw materials, and comprises first plastic particles, second plastic particles and third plastic particles, wherein the second plastic particles are obtained by smashing plastic waste; the first plastic granules comprise High Density Polyethylene (HDPE), the second plastic granules comprise Low Density Polyethylene (LDPE), and the third plastic granules comprise Linear Low Density Polyethylene (LLDPE); the content ratio is as follows by mass:

the first plastic particle is 15%

70 percent of second plastic particles

15% of third plastic particles.

The steps and production apparatus used therefor were the same as those of reference 1.

The hardness of examples 1-3 was tested, tear strength was tested by stretching the composite hose sheet, and clarity was visually observed to obtain the results shown in the table below, with more "+" indicating better performance.

	Example 1	Example 2	Example 3
				Hardness of	+++++	++++	++++
Tear strength	+	+	+++++
				Transparency	+++	+++++	+++

As can be seen from the above table, the material of example 3 is made of more recycled materials, and all of the three properties are better. The solutions of examples 1-3 can be selected to make a composite hose sheet according to different requirements for hose performance, and then both ends of the composite hose sheet are welded to form a hose.

Variations and modifications to the above-described embodiments may occur to those skilled in the art, in light of the above teachings and teachings. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and modifications and variations of the present invention are also intended to fall within the scope of the appended claims. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.