Color marking line mold for pipe fitting production

Abstract

The utility model provides a color marking line mold for pipe fitting production. Relates to the field of pipe processing, and comprises color marking line injection ports distributed in the inner wall of a straight section of a die and color marking line supply ports distributed in the outer wall of the straight section of the die, and the color marking line injection ports are communicated with the color marking line supply ports through color marking line runners located in the straight section of the die; an opening in one side, close to the axis of the die straight section, of the color marking line injection port is communicated with an internal channel of the die straight section; the section, in the axial direction of the die straight section, of the color marking line injection port is triangular; in order to solve the problem that the color marking line is easily injected into the pipe blank and cannot be exposed to the surface in time at present, the color marking line injection port is arranged at the straight section of the mouth mold and the cross section of the color marking line injection port is triangular, and the color marking line injection port forms a certain angle, so that the injection pressure of the color marking line is reduced, and the production efficiency is improved. And extruding and covering the surface of the pipe blank to quickly form the color marking line of the pipe.

Description

Technical Field

[0001] The utility model relates to the field of pipe processing, in particular to a color-coded line mold for producing pipe fittings. Background Art

[0002] PE pipe is a new type of pipe material. Due to its good corrosion resistance, pressure resistance, impact resistance, wear resistance and long service life, it has been widely used in industry, construction, water supply and drainage, etc. In order to distinguish the use of pipes, national or industry standards require that the appearance of pipes should be marked with different colors according to their use during production.

[0003] At present, when PE pipes are extruded, the color marking line is connected to the main mold through the color marking machine at the rear end of the die or the rear end of the spiral body, so that it is coated on the surface of the pipe through the straight section of the die to form a color marking line. However, when large-diameter PE pipes are produced, especially when the machine is initially started, due to the large gap between the molds and the low thermal conductivity of the PE raw materials, in order to ensure that the raw materials in the mold cavity reach a molten state, the heating time is long, which leads to a long heating time at the position where the material embryo contacts the inner surface of the die. When the machine is started, the color marking line is very easy to be injected into the inside of the tube embryo. As the production is slowly carried out, the color marking line needs to be gradually exposed to the surface. At the same time, the black material of the color marking line injection port needs to be the color of the color marking line. As a result, there are many abnormal waste products such as pipes without color marking lines or unclear color marking lines. Utility Model Content

[0004] The purpose of the utility model is to provide a color mark line mold for pipe fitting production in view of the defects existing in the prior art. The color mark line injection port is arranged at the straight section of the die and the color mark line injection port is set to have a triangular cross-section. The color mark line injection port forms a certain angle, which reduces the injection pressure of the color mark line, so that the color mark line is squeezed onto the surface of the tube blank, and the color mark line of the tube is quickly formed.

[0005] In order to achieve the above purpose, the following technical solutions are adopted:

[0006] A color-coded line mold for producing pipe fittings comprises a color-coded line injection port distributed on the inner wall of a straight section of a die and a color-coded line supply port distributed on the outer wall of the straight section of the die. The color-coded line injection port and the color-coded line supply port are connected via a color-coded line flow channel located inside the straight section of the die. An opening on one side of the color-coded line injection port near the axis of the straight section of the die is connected to the internal channel of the straight section of the die. The cross section of the color-coded line injection port in the axial direction of the straight section of the die is triangular.

[0007] Furthermore, in the axial direction of the straight section of the die, one side of the color mark line injection port is an inclined surface relative to the radial direction of the straight section of the die, and the other side is a plane along the radial direction of the straight section of the die.

[0008] Furthermore, the inclined surface is located on the upstream side of the plane.

[0009] Furthermore, the straight section of the die includes a main body and an annular end head, and an injection groove and a flow groove are provided on the downstream end face of the main body. One end of the annular end head is connected to the downstream end face of the main body to block the injection groove to form the main inlet of the color mark line and to block the flow groove to form the color mark line flow channel.

[0010] Furthermore, a through hole is formed on the annular end cap, a blind hole is formed on the downstream end surface of the main body, and a fastener passes through the through hole and cooperates with the blind hole to fix the annular end cap to the main body.

[0011] Furthermore, the annular end is provided with a plurality of through holes, the downstream end surface of the main body is provided with blind holes corresponding one to one with the through holes, and the fasteners and the through holes are matched one to one with each other.

[0012] Furthermore, the through holes are evenly distributed in the circumferential direction of the annular end, and the axes of the through holes and the blind holes are parallel to the axis of the annular end.

[0013] Furthermore, a plurality of color mark wire injection ports are provided along the straight section of the die in an annular direction, and the color mark wire supply port is connected to all the color mark wire injection ports through a color mark wire flow channel.

[0014] Furthermore, the color-coded wire supply port is provided with a threaded section to match an external color-coded wire supply pipe joint.

[0015] Furthermore, a die reducing section is provided upstream of the die straight section, and the diameter of the die reducing section gradually decreases along the axis of the die reducing section in the direction close to the die straight section.

[0016] Compared with the prior art, the utility model has the following advantages and positive effects:

[0017] (1) In view of the problem that the color mark line is easily injected into the inside of the tube blank and cannot be exposed to the surface in time, the color mark line injection port is arranged at the straight section of the die and the color mark line injection port is set to have a triangular cross-section. The color mark line injection port forms a certain angle to reduce the injection pressure of the color mark line, so that it is squeezed on the surface of the tube blank and the color mark line of the tube is quickly formed.

[0018] (2) The color code line injection port is composed of a main body and a ring end, which can be quickly cleaned after disassembly, reducing the problem of adulteration when adjusting the color of the color code line. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0020] Figure 1It is a schematic diagram of a color-coded line mold for producing pipe fittings in an embodiment of the utility model.

[0021] Figure 2 for Figure 1 A local enlarged schematic diagram of point B in the middle.

[0022] In the figure, 1 is the color marking line supply port, 2 is the die straight section, 3 is the color marking line flow channel, and 4 is the color marking line injection port. DETAILED DESCRIPTION

[0023] In a typical implementation of the present invention, Figure 1-Figure 2 As shown, a color-coded line mold for pipe production is proposed.

[0024] At present, the heating time of the contact position between the blank and the inner surface of the die is long, and the back pressure of the color mark line will cause the color mark line to be injected into the inside of the blank, and cannot float out in time to expose on the surface of the pipe. Based on this, the present embodiment provides a color mark line mold for pipe fitting production, and adjusts the structure of the color mark line injection port 4 so that the color mark line injection port 4 is set at a certain angle along the extrusion direction of the blank, thereby alleviating the problem of the color mark line being injected into the blank when the machine is started.

[0025] Below, a color-coded line mold for pipe production is described in detail with reference to the accompanying drawings.

[0026] A color-marked line mold for producing pipe fittings comprises a color-marked line injection port 4 distributed on the inner wall of a die straight section 2 and a color-marked line supply port 1 distributed on the outer wall of the die straight section 2. The die straight section 2 is used for outputting a tube embryo. The color-marked line injection port 4 faces the inner wall of the die straight section 2, and the color line is injected into the surface of the tube embryo to form a color-marked line on the surface of the pipe fitting.

[0027] The color mark line injection port 4 is connected with the color mark line supply port 1 through the color mark line flow channel 3 located inside the die straight section 2. After the color mark line supply port 1 is connected to the external color mark line supply pipeline, the color mark line pigment is input into the color mark line injection port 4 through the color mark line supply port 1 and the color mark line flow channel 3, and the color mark line pigment is outputted from the color mark line injection port 4 and injected into the surface of the tube embryo; the color mark line injection port 4 has an opening on one side near the axis of the die straight section 2 to be connected to the internal channel of the die straight section 2, and the cross section of the color mark line injection port 4 in the axial direction of the die straight section 2 is triangular.

[0028] In this embodiment, the color mark line injection port 4 of the color mark line mold for pipe fitting production is set to have a triangular cross-section, so that when outputting the color line pigment, the color line pigment output direction can be set at a certain angle along the extrusion direction of the tube embryo, on the one hand reducing the risk of injecting the color mark line into the tube embryo, and on the other hand reducing the impact on the pressure bearing of the tube.

[0029] Specifically, in the axial direction of the die straight section 2, one side of the color mark line injection port 4 is an inclined surface relative to the radial direction of the die straight section 2, and the other side is a plane along the radial direction of the die straight section 2. The inclined surface is located on the upstream side of the plane, so that the direction of the color line pigment output from the color mark line injection port 4 forms an acute angle with the extrusion direction of the tube embryo, reducing the speed of the color line pigment along the radial direction of the tube embryo under the same back pressure, thereby avoiding penetrating the tube embryo wall.

[0030] At the same time, the inclined surface is located on the upstream side of the plane, so that the direction of the color line pigment output from the color mark line injection port 4 forms an acute angle with the extrusion direction of the tube embryo, which can increase the output speed of the color line pigment along the axial direction.

[0031] In this embodiment, the color wire flow channel of the color wire mold for pipe fitting production is to reduce the melting pressure loss, and the ratio of the color wire flow channel width to the depth is controlled at 1 to 1.5. The depth ratio of the color wire flow channel is adjusted according to the back pressure supplied by the external color wire supply pipeline and the depth of the color wire injected into the tube embryo. Generally, the greater the back pressure, the deeper the depth of the color wire injected into the tube embryo. The depth of the color wire flow channel can be increased to reduce the back pressure and reduce the depth of the color wire injected into the tube embryo; the back pressure can also be reduced to reduce the depth of the color wire injected into the tube embryo.

[0032] like Figure 1 and Figure 2 As shown, the straight section 2 of the die includes a main body and an annular end head, which are detachably connected. An injection groove and a flow groove are provided on the downstream end face of the main body. One end of the annular end head is butted against the downstream end face of the main body. When the end face of the annular end head coaxially abuts against the downstream end face of the main body, the injection groove can be blocked to form the main inlet of the color mark line, and the flow groove can be blocked to form the color mark line flow channel 3.

[0033] The color marking line mold and the mouth mold for pipe fitting production share a set of molds, while the conventional color marking line mold is generally located in the middle of the mold body, the color line passes through the inner wall of the mold body for a long distance, and the line stripping is slow. In this embodiment, after the color line injection port is moved to the straight section 2 of the mouth mold, the color line supply port is also located in the straight section 2 of the mouth mold, the color line pigment travels a shorter distance in the mold body, and the line stripping speed can be accelerated.

[0034] A die reducing section is provided upstream of the die straight section 2 , and the diameter of the die reducing section gradually decreases along the axis of the die reducing section in the direction close to the die straight section 2 .

[0035] The color line supply port is moved to the straight section 2 of the die, and the PE pipe model is changed by replacing the die, that is, there is no raw material on the inner wall of the die before starting the machine. At the same time, the end face of the straight section 2 of the die is the die outlet. Employees can use tools to clean the straight section 2 of the die without the influence of residual raw materials.

[0036] Regarding the main body and the annular end of the die straight section 2, a through hole is provided on the annular end, a blind hole is provided on the downstream end face of the main body, and a fastener passes through the through hole and cooperates with the blind hole to fix the annular end to the main body. There are multiple through holes on the annular end, and blind holes corresponding to the through holes are provided on the downstream end face of the main body. The fasteners and the through holes correspond to each other one by one. The through holes are evenly distributed along the annular end, and the axes of the through holes and the blind holes are parallel to the axes of the annular end. There are multiple color mark line injection ports 4 along the annular straight section 2 of the die, and the color mark line supply port 1 is connected to all the color mark line injection ports 4 through the color mark line flow channel 3.

[0037] like Figure 2 As shown, the color-coded wire supply port 1 is provided with a threaded section to match an external color-coded wire supply pipe joint.

[0038] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A color-coded line mold for pipe production, characterized in that: The invention comprises a color mark line injection port distributed on the inner wall of the straight section of the die and a color mark line supply port distributed on the outer wall of the straight section of the die. The color mark line injection port and the color mark line supply port are connected through a color mark line flow channel located inside the straight section of the die. The color mark line injection port has an opening on one side close to the axis of the straight section of the die connected to the internal channel of the straight section of the die. The cross section of the color mark line injection port in the axial direction of the straight section of the die is triangular.

2. The color-coded line mold for pipe production according to claim 1, characterized in that: In the axial direction of the straight section of the die, one side of the color mark line injection port is an inclined surface relative to the radial direction of the straight section of the die, and the other side is a plane along the radial direction of the straight section of the die.

3. The color-coded line mold for pipe production according to claim 2, characterized in that: The inclined surface is located on the upstream side of the plane.

4. The color-coded line mold for pipe production according to claim 1, characterized in that: The straight section of the die includes a main body and an annular end head. An injection groove and a flow groove are provided on the downstream end face of the main body. One end of the annular end head is butted against the downstream end face of the main body to block the injection groove to form the main inlet of the color mark line and to block the flow groove to form the flow channel of the color mark line.

5. The color-coded line mold for pipe production according to claim 4, characterized in that: The annular end head is provided with a through hole, and the downstream end surface of the main body is provided with a blind hole. The fastener passes through the through hole and cooperates with the blind hole to fix the annular end head to the main body.

6. The color-coded line mold for pipe production according to claim 5, characterized in that: The annular end head is provided with a plurality of through holes, the downstream end surface of the main body is provided with blind holes corresponding to the through holes one by one, and the fasteners and the through holes are matched one by one.

7. The color-coded line mold for pipe production according to claim 6, characterized in that: The through holes are evenly distributed along the annular end, and the axes of the through holes and the blind holes are parallel to the axis of the annular end.

8. The color-coded line mold for pipe production according to claim 1, characterized in that: The color mark wire injection ports are provided with a plurality of them in an annular direction along the straight section of the die, and the color mark wire supply ports are connected to all the color mark wire injection ports through the color mark wire flow channels.

9. The color-coded line mold for pipe production according to claim 8, characterized in that: The color mark wire supply port is provided with a threaded section to match an external color mark wire supply pipeline joint.

10. The color-coded line mold for pipe production according to claim 1, characterized in that: A die reducing section is provided upstream of the die straight section, and the diameter of the die reducing section gradually decreases along the axis of the die reducing section in the direction close to the die straight section.

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