Non-bulge forming device for color strip of hose

Abstract

The utility model discloses a non-bulge forming device for a color strip of a hose, which comprises a main die body, the middle part of the main die body is provided with a first forming ring cavity which is opened towards the side of an outlet pipe, and the main die body is provided with a main material injection ring cavity which is communicated with the first forming ring cavity; an auxiliary die body is fixedly installed on the pipe outlet side of the main die body, a second forming annular cavity forming a continuous forming channel with the first forming annular cavity is formed in the auxiliary die body in a penetrating mode, and a grooving protrusion is arranged on the outer side wall of the end, close to the first forming annular cavity, of the second forming annular cavity; and an auxiliary material injection nozzle is arranged on the auxiliary die body and is positioned on the pipe outlet side of the grooving bulge. The color strip does not protrude out of the surface of the hose, the machining efficiency is high, and material combination is good.

Description

Technical Field

[0001] The utility model relates to the technical field of hose processing, in particular to a hose color strip non-convexity forming device. Background Art

[0002] Plastic hose is a hose made of plastic material. It is widely used in many fields such as industry, medical treatment, food, etc. due to its softness, transparency, and corrosion resistance. Plastic hoses can be divided into ordinary hoses, braided hoses, and steel wire hoses according to their structural composition. Among them, steel wire hoses are hoses with a steel wire reinforcement layer formed inside the tube wall. In actual production, a color strip is generally processed on the surface of the hose to improve the appearance of the hose, and it is used as a carrier for inkjet printing and as an intuitive feedback of the torsion of the tube body. But if Figure 7 As shown in FIG. 1 , the existing color strip processing is to re-form the outer surface of the tube wall after the tube is formed, so the color strips are all raised on the outer peripheral surface of the tube, such as Figure 8 As shown, this increases the cross-sectional profile of the hose in disguise. When the colored strips are inserted into limited holes on some industrial equipment or vehicles, they will significantly increase the insertion resistance and increase the difficulty of installation. This problem is particularly prominent in the use of steel wire hoses with high compressive strength. Therefore, it is necessary to provide a means to prevent the colored strips from protruding from the surface of the hose to solve the above problem. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a device for forming the color strip of a hose without protrusion, which makes the color strip not protrude from the surface of the hose and has high processing efficiency and good material bonding.

[0004] In order to solve the above technical problems, the technical solution of the utility model is: a device for forming a soft tube color strip without protrusions, comprising a main mold body, a first molding ring cavity opening toward the tube outlet side is provided in the middle of the main mold body, and a main material injection ring cavity connected to the first molding ring cavity is provided on the main mold body; a sub-mold body is fixedly installed on the tube outlet side of the main mold body, a second molding ring cavity is penetrated by the sub-mold body and forms a continuous molding channel with the first molding ring cavity, a groove protrusion is provided on the outer side wall of the second molding ring cavity near one end of the first molding ring cavity, and an auxiliary material injection nozzle is provided on the sub-mold body at the tube outlet side of the groove protrusion.

[0005] As a preferred technical solution, the height of the grooved protrusion is gradually increased along the pipe outlet direction.

[0006] As a preferred technical solution, the distance between the main material injection ring cavity and the groove forming protrusion is 1mm to 10mm.

[0007] As a preferred technical solution, the groove-forming protrusion is arranged in the shape of an arched protrusion.

[0008] As a preferred technical solution, the top surface of the grooving projection is arranged in a planar shape.

[0009] As a preferred technical solution, the main mold body includes a mouth mold body. A first forming channel is provided through the middle of the mouth mold body. A material injection outer conical surface is provided at one end of the mouth mold body where the first forming channel is located. An outer cone body is fixedly provided on the mouth mold body at the material injection outer conical surface. A main material injection annular cavity is formed between the outer cone body and the material injection outer conical surface. A mandrel channel is provided through the middle of the outer cone body. A forming mandrel is installed in the mandrel channel. A forming section extending to the first forming channel is integrally provided on the forming mandrel. A first forming annular cavity is formed between the forming section and the first forming channel.

[0010] As a preferred technical solution, a second forming channel corresponding to the first forming channel is provided in the middle of the auxiliary mold body. The forming section extends into the second forming channel. A second forming annular cavity is formed between the forming section and the second forming channel.

[0011] Due to the adoption of the above technical solution, a hose color strip non-protrusion forming device includes a main mold body. A first forming annular cavity opening towards the pipe outlet side is provided in the middle of the main mold body. A main material injection annular cavity communicating with the first forming annular cavity is provided on the main mold body. An auxiliary mold body is fixedly installed on the pipe outlet side of the main mold body. A second forming annular cavity forming a continuous forming channel with the first forming annular cavity is provided through the auxiliary mold body. A grooving projection is provided on the outer side wall at one end of the second forming annular cavity close to the first forming annular cavity. An auxiliary material injection nozzle is provided on the pipe outlet side of the auxiliary mold body at the grooving projection. In the present utility model, a part of the forming annular cavity is arranged on the auxiliary mold body, so that the auxiliary material injection nozzle on the auxiliary mold body can be as close as possible to the main material injection annular cavity. Thus, the main material injected into the first forming annular cavity from the main material injection annular cavity can be rigidly pressed by the grooving projection in a softened state to generate a groove on the outer wall of the pipe. The auxiliary material injection nozzle close to the grooving projection can inject auxiliary material into the groove position. Under the forming restriction of the subsequent second forming annular cavity, the auxiliary material injected from the auxiliary material injection nozzle, that is, the color strip raw material, can form a regular tube together with the main material, and there is no protrusion on the outer peripheral surface of the tube. And in the present utility model, the main material and the auxiliary material are formed at one time in a softened state, with high processing efficiency, good material combination, not easy to crack, and beneficial to ensuring the quality of the pipe material. Description of the Drawings

[0012] The following drawings are only intended to illustrate and explain the present utility model schematically and do not limit the scope of the present utility model. Among them:

[0013] Figure 1 is a schematic cross-sectional structure view of an embodiment of the present utility model;

[0014] Figure 2 is Figure 1 the enlarged schematic view of the structure at position I of

[0015] Figure 3 is Figure 1 the enlarged schematic view of the A - A structure of

[0016] Figure 4 is Figure 3 the cross - sectional view of the hose produced with a grooving protrusion shape;

[0017] Figure 5 is Figure 3 the structural schematic diagram when the grooving protrusion in

[0018] Figure 6 is Figure 5 the cross - sectional view of the hose produced with a grooving protrusion shape;

[0019] Figure 7 is the structural schematic diagram of the prior - art color bar processing;

[0020] Figure 8 is the cross - sectional view of the hose processed by the prior art.

[0021] In the figure: 1 - main die body; 11 - first forming ring cavity; 12 - main material injection ring cavity; 13 - main material injection port; 14 - die body; 15 - first forming hole; 16 - injection outer conical surface; 17 - outer cone; 18 - mandrel hole; 2 - forming mandrel; 21 - forming section; 3 - auxiliary die body; 31 - second forming ring cavity; 32 - second forming hole; 33 - auxiliary material injection nozzle; 34 - auxiliary material injection port; 4 - grooving protrusion. Specific embodiments

[0022] The following further elaborates on the present invention in conjunction with the accompanying drawings and embodiments. In the following detailed description, only some exemplary embodiments of the present invention are described by way of illustration. Undoubtedly, 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 invention. Therefore, the accompanying drawings and the description are illustrative in nature and not used to limit the protection scope of the claims.

[0023] As Figures 1 to 6As shown together, the hose color strip non-protrusion forming device includes a main die body 1. A first forming ring cavity 11 opening towards the pipe outlet side is provided in the middle of the main die body 1. A main material injection ring cavity 12 communicating with the first forming ring cavity 11 is provided on the main die body 1. Of course, a main material injection port 13 communicating with the main material injection ring cavity 12 is provided on the main die body 1. The main material injection port 13 is connected with a main material supply device for injecting the heated and softened main material into the first forming ring cavity 11 through the main material injection port 13 and the main material injection ring cavity 12, so that it gradually forms a tubular shape under the restriction of the ring cavity. The main material is the main material of the pipe wall, which is configured according to needs and is well-known to those skilled in the art, and will not be elaborated here.

[0024] In this embodiment, the main die body 1 includes a die body 14. A first forming hole 15 runs through the middle of the die body 14. A material injection outer cone surface 16 is provided at one end of the die body 14 where the first forming hole 15 is located. An outer cone body 17 is fixedly provided on the die body 14 at the material injection outer cone surface 16. The main material injection ring cavity 12 is formed between the outer cone body 17 and the material injection outer cone surface 16. A core rod hole 18 runs through the middle of the outer cone body 17. A forming core rod 2 is installed in the core rod hole 18. A forming section 21 extending to the first forming hole 15 is integrally provided on the forming core rod 2. The first forming ring cavity 11 is formed between the forming section 21 and the first forming hole 15. The construction principle of the above main material injection ring cavity 12 and the first forming ring cavity 11 is easily understood by those skilled in the art in combination with the existing hose forming die technology, and will not be elaborated here.

[0025] A sub-die body 3 is fixedly installed on the pipe outlet side of the main die body 1. A second forming ring cavity 31 forming a continuous forming channel with the first forming ring cavity 11 runs through the sub-die body 3. During the process of the softened main material from the first forming ring cavity 11 to the second forming ring cavity 31, it gradually solidifies into the required tube shape. After the tubular structure is output from the second forming ring cavity 31, it is cooled and shaped to obtain the pipe.

[0026] Preferably, a second forming hole 32 corresponding to the first forming hole 15 is provided in the middle of the sub-die body 3. The forming section 21 extends into the second forming hole 32. The second forming ring cavity 31 is formed between the forming section 21 and the second forming hole 32, so as to simplify the structure and facilitate the manufacture of components such as the sub-die body 3.

[0027] On the outer wall of the second forming ring cavity 31 near one end close to the first forming ring cavity 11, a groove-forming protrusion 4 is provided. On the sub-mold body 3 at the material outlet side of the groove-forming protrusion 4, a sub-material injection nozzle 33 is provided. Of course, the sub-material injection nozzle 33 is connected to a sub-material injection port 34, and a sub-material supply device is connected to the sub-material injection port 34 to inject the heated and softened sub-material through the sub-material injection port 34 and the sub-material injection nozzle 33. Among them, the sub-material is the raw material for color strips, and its color and the like can be configured according to needs, which is also well-known to those skilled in the art and will not be elaborated here.

[0028] In this embodiment, the forming channel for forming the pipe is composed of the first forming ring cavity 11 and the second forming ring cavity 31. The second forming ring cavity 31 is arranged on the sub-mold body 3. The length of the first forming ring cavity 11 is shortened, and the main material injection ring cavity 12 will be relatively close to the second forming ring cavity 31, so that the sub-material injection nozzle 33 on the sub-mold body 3 can be relatively close to the main material injection ring cavity 12. The main material injected into the first forming ring cavity 11 by the main material injection ring cavity 12 can be rigidly pressed by the groove-forming protrusion 4 in the softened state to generate a groove on the outer wall of the pipe. The sub-material injection nozzle 33 close to the groove-forming protrusion 4 can inject the sub-material into the groove position. Under the subsequent forming restriction of the second forming ring cavity 31, the sub-material injected from the sub-material injection nozzle 33 can form a regular tube together with the main material, and there is no protrusion on the outer peripheral surface of the tube. The main material and the sub-material are formed in one time in the softened state, with high processing efficiency, good material combination, not easy to crack, and conducive to ensuring the quality of the pipe.

[0029] Preferably, the height of the groove-forming protrusion 4 gradually increases along the pipe outlet direction, so as to reduce the injection resistance of the main material, avoid sudden change of resistance at the groove-forming protrusion 4, promote the more regular formation of the pressed groove, enable the subsequently injected sub-material to form a better combination, and finally form a smooth color strip.

[0030] Preferably, the distance between the main material injection ring cavity 12 and the groove-forming protrusion 4 is 1 mm to 10 mm, so that the main material injected into the first forming ring cavity 11 can be pressed out of a groove by the groove-forming protrusion 4 while still in a good softened state, and is conducive to forming a better combination with the injected sub-material.

[0031] As Figure 3 and Figure 4 shown, the groove-forming protrusion 4 in this embodiment is arranged in an arched protrusion shape, so as to be able to press and form an arc-shaped groove. Of course, as Figure 5 and Figure 6 shown, the top surface of the groove-forming protrusion 4 can also be arranged in a flat shape, so as to press and form a shape similar to a flat-mouth notch, so that a larger bonding surface is formed between the injected sub-material and the main material, and the bonding effect is further improved.

[0032] The foregoing has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments, and what is described in the above embodiments and the specification is only to illustrate the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. The hose color strip non-protrusion forming device includes a main mold body. A first forming annular cavity opening towards the pipe outlet side is provided in the middle of the main mold body, and a main material injection annular cavity communicating with the first forming annular cavity is provided on the main mold body. It is characterized in that: A sub-mold body is fixedly installed on the tube outlet side of the main mold body. A second forming annular cavity is provided through the sub-mold body, which forms a continuous forming channel with the first forming annular cavity. A grooving protrusion is provided on the outer side wall of the second forming annular cavity near one end close to the first forming annular cavity. A sub-material injection nozzle is provided on the tube outlet side of the sub-mold body at the grooving protrusion.

2. The hose color stripe non-protrusion forming device according to claim 1, characterized in that: The height of the grooving protrusion is gradually increased along the tube outlet direction.

3. The hose color stripe non-protrusion forming device according to claim 1, characterized in that: The distance between the main material injection annular cavity and the grooving protrusion is 1 mm to 10 mm.

4. The hose color strip non-protrusion forming device according to claim 1, characterized in that: The grooving protrusion is arranged in an arched protrusion shape.

5. The hose color stripe non-protrusion forming device according to claim 1, characterized in that: The top surface of the grooving protrusion is arranged in a planar shape.

6. The hose color strip non-protrusion forming device according to any one of claims 1 to 5, characterized in that: The main mold body includes a die body. A first forming hole is provided through the middle of the die body. A material injection outer conical surface is provided at one end of the die body at the first forming hole. An outer cone is fixedly provided on the die body at the material injection outer conical surface. A main material injection annular cavity is formed between the outer cone and the material injection outer conical surface. A mandrel hole is provided through the middle of the outer cone. A forming mandrel is installed in the mandrel hole. A forming section extending to the first forming hole is integrally provided on the forming mandrel. A first forming annular cavity is formed between the forming section and the first forming hole.

7. The hose color stripe non-protrusion forming device according to claim 6, characterized in that: A second forming hole corresponding to the first forming hole is provided in the middle of the sub-mold body. The forming section extends into the second forming hole. A second forming annular cavity is formed between the forming section and the second forming hole.

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