Composite hose outer layer tight forming machine

Abstract

The utility model discloses a composite hose outer layer compact forming machine which comprises a forming machine body, a hose outer layer extrusion die and an extrusion material feeding device, the hose outer layer extrusion die comprises an extrusion die body and an extrusion die core hole, and a hose outer layer forming die core is sleeved with the extrusion die core hole. An airflow through hole and a material passing hole penetrate through the hose outer layer forming mold core, an elastic mold core diaphragm is arranged at the hose feeding end of the hose outer layer forming mold core, a hose outer layer shaping mold plate and a hose shaping feeding hole are detachably mounted at the hose discharging end of the extrusion mold body, and the extrusion mold body is further connected with a negative pressure device; a gap is formed between the hose outer layer forming mold core and the advancing pipe body, negative pressure is formed in the gap through the negative pressure device, materials can smoothly enter the gap and flow conveniently, the surface of the formed hose outer layer is smoother along with advancing of the pipe body and cooperation of the hose outer layer shaping mold plate, and therefore the forming effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of composite hose production tools, in particular to a composite hose outer layer tight forming machine. Background Art

[0002] Composite hoses such as fiber-reinforced composite hoses are also called corrugated hoses, braided hoses, etc. They have a smooth appearance, a small radius of curvature, and are characterized by high strength, high modulus, high elasticity, tear resistance, solvent resistance, oil resistance, and weather resistance. They also have the properties of both rubber and plastic, and are mainly used in high-end food, cosmetics, medicine and other production industries with high requirements. The fiber-reinforced composite hose generally has at least one inner tube layer and one outer tube layer, and a fiber winding layer is sandwiched between the outermost inner tube layer and the outer tube layer. When the fiber-reinforced composite hose is processed and produced, the inner tube layer is first extruded and cooled to form, and then it is passed through a device for applying the fiber winding layer to wind and cover the fiber winding layer on the outer surface of the outermost inner tube layer. Then, the inner tube layer with the fiber winding layer passes through the outer tube layer forming machine to form an outer tube layer on the outside of the fiber winding layer. When forming the outer tube layer, the material extrusion port is arranged inside the extrusion die. When simply using a feeding component such as a screw feeder to feed the material, there are problems such as unsmooth material extrusion and uneven distribution of the material in the extrusion cavity, resulting in uneven thickness of the formed outer tube layer and poor forming effect. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a composite hose outer layer tight forming machine that helps to improve the smoothness of material extrusion, improve the uniformity of the cloth in the extrusion cavity, and make the forming effect of the outer tube layer better.

[0004] To solve the above technical problem, the technical solution of the utility model is: a composite hose outer layer tight forming machine, including a forming machine main body, a hose outer layer extrusion die is installed and supported on the forming machine main body, an extrusion material feeding device is communicated between the hose outer layer extrusion die and the forming machine main body, and the discharging end of the extrusion material feeding device is arranged inside the hose outer layer extrusion die. The hose outer layer extrusion die includes an extrusion die body, an extrusion die core hole is provided through the extrusion die body, a hose outer layer forming die core is sleeved in the extrusion die core hole, an air flow hole and a material through hole are provided through the hose outer layer forming die core, the extrusion material feeding device is communicated with the hose outer layer forming die core through the material through hole, an elastic die core diaphragm is arranged at the hose feeding end of the hose outer layer forming die core, a hose feeding hole is provided through the elastic die core diaphragm, a hose outer layer shaping template is detachably installed at the hose discharging end of the extrusion die body, a hose shaping discharging hole is provided through the hose outer layer shaping template, and a negative pressure device is also connected through the extrusion die body, and the air inlet end of the negative pressure device is communicated with the air flow hole.

[0005] As a preferred technical solution, the hose outer layer forming mold core includes a hollow hose outer layer forming core tube, and the end of the hose outer layer forming core tube is integrally formed with a mounting flange, and the mounting flange is detachably assembled with the extrusion mold body by bolts.

[0006] As a preferred technical solution, the hose shaping and delivery hole includes a transition hole section with an inner diameter gradually decreasing from the core hole of the extrusion die to the outside, and a shaping hole section with an equal diameter is provided on the outside of the transition hole section, and the transition hole section and the shaping hole section are coaxially arranged with the core hole of the extrusion die.

[0007] As a preferred technical solution, the negative pressure device includes a negative pressure tube, an inner port of the negative pressure tube is connected to the core hole of the extrusion die, and an outer port of the negative pressure tube is connected to a negative pressure machine.

[0008] As an optimal technical solution, the extrusion material feeding device includes a material feeding cylinder, in which a material feeding auger is installed. The discharge end of the material feeding cylinder extends into the extrusion mold body and a discharge nozzle is fixedly connected to the port, and the discharge nozzle is arranged corresponding to the material through-hole.

[0009] As an improvement to the above technical solution, the material feeding cylinder includes a feeding cylinder fixed section connected to the molding machine body, and a feeding cylinder movable section matched with the extrusion mold body. The feeding cylinder fixed section and the feeding cylinder movable section are partially fitted together, and connecting bolts are arranged on the outer periphery of the fitting part between the feeding cylinder fixed section and the feeding cylinder movable section.

[0010] Due to the adoption of the above technical scheme, the utility model has the following beneficial effects: a gap is formed between the hose outer layer forming mold core and the moving hose body to be coated with the hose outer layer, which is used to receive and accommodate the material fed by the extrusion material feeding device to form the hose outer layer for use, and the gap can be effectively closed by the elastic mold core diaphragm, so as to cooperate with the negative pressure device. The negative pressure device forms a negative pressure in the above gap, which helps the material to enter the gap smoothly and flow toward the side close to the elastic mold core diaphragm, so that the contact area between the material and the outer wall of the hose body is large and the material is evenly distributed, so that the material forms a uniformly coated hose outer layer on the outer periphery of the hose body, and cooperates with the hose outer layer shaping template as the hose body moves, so that the surface of the hose outer layer is smoother, thereby improving the molding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The following drawings are intended only to illustrate and explain the present invention, and are not intended to limit the scope of the present invention.

[0012] Figure 1 This is a schematic structural diagram of the first embodiment of the present invention;

[0013] Figure 2 It is a schematic cross-sectional structure diagram of the first embodiment of the present utility model;

[0014] Figure 3 It is a schematic structure diagram of the second embodiment of the present utility model;

[0015] Figure 4 It is a schematic diagram for comparing the adjustment of the extrusion material feeding device in the second embodiment of the present utility model;

[0016] In the figure: 1 - main body of the molding machine; 2 - main body of the extrusion die; 3 - core die for forming the outer layer of the hose; 31 - core pipe for forming the outer layer of the hose; 32 - mounting flange; 4 - air flow through hole; 5 - material through hole; 6 - elastic core diaphragm; 7 - hose feeding hole; 8 - negative pressure pipe; 9 - negative pressure machine; 10 - outer layer shaping template of the hose; 11 - transition hole section; 12 - shaping hole section; 13 - material feeding cylinder; 131 - fixed section of the feeding cylinder; 132 - movable section of the feeding cylinder; 14 - material feeding auger; 15 - discharge nozzle; 16 - connecting bolt. Specific embodiments

[0017] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments. In the following detailed description, only some exemplary embodiments of the present utility model are described by way of illustration. It is undoubted that those of ordinary skill in the art can recognize that the described embodiments can be modified in various different ways without departing from the spirit and scope of the present utility model. Therefore, the drawings and the description are illustrative in nature and are not used to limit the protection scope of the claims.

[0018] Embodiment 1:

[0019] As Figure 1 and Figure 2 shown, a composite hose outer layer tight molding machine is used to form an outer layer of the hose on the outer side of the winding layer of the composite hose to obtain a fiber-reinforced composite hose. Specifically, it includes a main body 1 of the molding machine. The specific structure of the main body 1 of the molding machine is well-known to those of ordinary skill in the art and will not be described in detail here. A hose outer layer extrusion die is mounted and supported on the main body 1 of the molding machine. An extrusion material feeding device is communicated between the hose outer layer extrusion die and the main body 1 of the molding machine, and the discharge end of the extrusion material feeding device is arranged inside the hose outer layer extrusion die. The heated material provided by the main body 1 of the molding machine is conveyed into the hose outer layer extrusion die through the extrusion material feeding device for use in molding the outer layer of the hose.

[0020] The hose outer layer extrusion die of this embodiment includes an extrusion die body 2, an extrusion die core hole is provided through the extrusion die body 2, a hose outer layer forming die core 3 is installed in the extrusion die core hole, an air flow hole 4 and a material through-hole 5 are provided through the hose outer layer forming die core 3, the extrusion material feeding device is connected with the hose outer layer forming die core 3 through the material through-hole 5, a hose outer layer forming hole is provided through the hose outer layer forming die core 3 for the tube body to pass through and form the hose outer layer, the extrusion material feeding device feeds material into the hose outer layer forming hole to form the hose outer layer wrapped around the outside of the tube body winding layer during the tube body passing through the inside thereof.

[0021] Specifically, the hose outer layer molding die core 3 includes a hollow hose outer layer molding core tube 31, the hose outer layer molding hole is the tube hole described in the hose outer layer molding core tube 31, and the end of the hose outer layer molding core tube 31 is integrally formed with a mounting flange 32, and the mounting flange 32 is detachably assembled with the extrusion mold body 2 by bolts for easy replacement and maintenance.

[0022] The hose inlet end of the hose outer layer forming die core 3 is provided with an elastic core diaphragm 6, and a hose inlet hole 7 is provided through the elastic core diaphragm 6. A negative pressure device is also connected through the extrusion die body 2, and the air inlet end of the negative pressure device is connected to the air flow hole 4. In order to facilitate the formation of the hose outer layer outside the wound layer of the hose, the inner diameter of the hose outer layer forming core tube 31 needs to be larger than the outer diameter of the tube body passing through it. The purpose of using the negative pressure device is to create a negative pressure inside the hose outer layer forming core tube 31 to assist the flow and distribution of materials. Therefore, in order to ensure the negative pressure effect inside the hose outer layer forming core tube 31, the elastic core diaphragm 6 is used to seal the end of the hose outer layer forming core tube 31 outside the tube body to minimize the entry of air from this point when the negative pressure device is in operation, thereby reducing the impact of external air on the negative pressure effect inside the hose outer layer forming core tube 31. The elastic core diaphragm 6 is thin and has a certain elasticity, and is easy to deform to better cover the outer circumference of the tube body, and will not generate much resistance to the movement of the tube body.

[0023] The negative pressure device includes a negative pressure tube 8, the inner port of the negative pressure tube 8 is connected to the core hole of the extrusion die, the outer port of the negative pressure tube 8 is connected to the negative pressure machine 9, and the core hole of the extrusion die is connected to the air flow hole 4, so the negative pressure tube 8 can be connected to the tube cavity of the outer layer molding core tube 31 of the hose through the air flow hole 4 to discharge the air in the tube cavity and form negative pressure there.

[0024] A hose outer layer shaping template 10 is detachably installed at the hose delivery end of the extrusion die body 2, and a hose shaping delivery hole is provided through the hose outer layer shaping template 10. Specifically, the hose shaping delivery hole includes a transition hole section 11 with a gradually decreasing inner diameter from the extrusion die core hole outward, an equal-diameter shaping hole section 12 is provided outside the transition hole section 11, and the transition hole section 11, the shaping hole section 12 and the extrusion die core hole are coaxially arranged. With the cooperation of the above structure and the negative pressure device, a uniform hose outer layer is formed on the surface of the pipe body.

[0025] When the negative pressure machine 9 is started, the negative pressure pipe 8 discharges the gas in the lumen of the hose outer layer forming core pipe 31 to form a negative pressure, so that the extrusion material feeding device can more smoothly enter into the hose outer layer forming core pipe 31 and be distributed on the outer periphery of the pipe body. Compared with the traditional structure without negative pressure, the distribution area of the material in the hose outer layer forming core pipe 31 increases, and the contact area with the pipe body increases, improving the cloth laying effect. When the pipe body advances in the hose outer layer forming core pipe 31, under the action of the frictional force between it and the material, some materials will be carried forward and accumulate and fill in the transition hole section 11 under the action of the shaping hole section 12, making the material distribution on the outside of the pipe body uniform. And under the cooperation of the shaping hole section 12 and the advancement of the pipe body, the forming effect of the hose outer layer is significantly improved.

[0026] The extrusion material feeding device in this embodiment includes a material feeding cylinder 13, a material feeding auger 14 is installed in the material feeding cylinder 13, the discharge end of the material feeding cylinder 13 extends into the extrusion die body 2 and is fixedly connected with a discharge nozzle 15 at the port, the discharge nozzle 15 corresponds to the material through hole 5, and under the action of the material feeding auger 14, the material is slowly squeezed into the lumen of the hose outer layer forming core pipe 31 through the discharge nozzle 15 and the material through hole 5 to form a hose outer layer.

[0027] Embodiment Two:

[0028] The difference between this embodiment and Embodiment One is that the height of the discharge nozzle 15 of the extrusion material feeding device is adjustable to meet the replacement and use of the hose outer layer forming core pipes 31 with different pipe diameters, so that this embodiment can form a hose outer layer on the outside of hoses with different pipe diameters, which helps to improve the flexibility of the use of the whole structure. Specifically, as Figure 3 and Figure 4As shown, the material feeding cylinder 13 includes a feeding cylinder fixed section 131 connected to the main body 1 of the molding machine, and a feeding cylinder movable section 132 cooperating with the extrusion die body 2. The feeding cylinder fixed section 131 and the feeding cylinder movable section 132 are partially sleeved and matched, and connecting bolts 16 are arranged on the outer periphery of the sleeved and matched part of the feeding cylinder fixed section 131 and the feeding cylinder movable section 132. The connecting bolts 16 are arranged on the flange plates corresponding to the feeding cylinder fixed section 131 and the feeding cylinder movable section 132. By adjusting the sleeved length of the feeding cylinder movable section 132 and the feeding cylinder fixed section 131, the height of the discharge nozzle 15 can be adjusted, and the adjustment is simple. When used for hoses with different pipe diameters, it is necessary to set the hose shaping and sending holes with corresponding sizes. Of course, the hose feeding holes 7 on the elastic die core diaphragm 6 can also be adjusted adaptively.

[0029] The description of the present invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments were chosen and described in order to best explain the principles of the present invention and its practical application, and to enable others of ordinary skill in the art to understand the present invention and design various embodiments with various modifications suitable for the particular use.

Claims

1. Composite hose outer layer tight forming machine, including a forming machine main body, on which a hose outer layer extrusion die is installed and supported, a extrusion material feeding device is communicated between the hose outer layer extrusion die and the forming machine main body, and the discharging end of the extrusion material feeding device is arranged inside the hose outer layer extrusion die, and it is characterized in that: The outer layer extrusion die of the hose includes an extrusion die body. An extrusion die core hole runs through the extrusion die body. A hose outer layer forming die core is sleeved in the extrusion die core hole. An air flow hole and a material through hole run through the hose outer layer forming die core. The extrusion material feeding device is communicated with the hose outer layer forming die core through the material through hole. An elastic die core diaphragm is provided at the hose feeding end of the hose outer layer forming die core. A hose feeding hole runs through the elastic die core diaphragm. A hose outer layer shaping template is detachably installed at the hose discharging end of the extrusion die body. A hose shaping and discharging hole runs through the hose outer layer shaping template. A negative pressure device is also connected to the extrusion die body, and the air inlet end of the negative pressure device is communicated with the air flow hole.

2. The outer layer close molding machine of the composite hose according to claim 1, characterized in that: The hose outer layer forming die core includes a hollow hose outer layer forming core tube. An installation flange is integrally formed at the end of the hose outer layer forming core tube. The installation flange is detachably assembled with the extrusion die body through bolts.

3. The outer layer tight forming machine of the composite hose according to claim 1, characterized in that: The hose shaping and discharging hole includes a transition hole section with a gradually decreasing inner diameter from the extrusion die core hole outwards. An equal-diameter shaping hole section is provided outside the transition hole section, and the transition hole section, the shaping hole section and the extrusion die core hole are coaxially arranged.

4. The outer layer tight forming machine for the composite hose according to claim 1, characterized in that: The negative pressure device includes a negative pressure pipe. The inner port of the negative pressure pipe is communicated with the extrusion die core hole, and the outer port of the negative pressure pipe is communicated with a negative pressure machine.

5. The outer layer tight forming machine of the composite hose according to claim 1, characterized in that: The extrusion material feeding device includes a material feeding cylinder. A material feeding auger is installed in the material feeding cylinder. The discharging end of the material feeding cylinder extends into the extrusion die body and is fixedly connected with a discharging nozzle at the port. The discharging nozzle is arranged corresponding to the material through hole.

6. The outer layer tight forming machine of the composite hose according to claim 5, characterized in that: The material feeding cylinder includes a feeding cylinder fixed section communicated with the main body of the molding machine, and a feeding cylinder movable section matched with the extrusion die body. The feeding cylinder fixed section and the feeding cylinder movable section are partially sleeved and matched, and connecting bolts are arranged on the outer periphery of the sleeved and matched part of the feeding cylinder fixed section and the feeding cylinder movable section.

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