Outer-layer rubber extrusion die of rubber pipe

Abstract

The invention discloses an outer-layer rubber extrusion die for a rubber tube. The outer-layer rubber extrusion die comprises an outer-layer rubber extrusion die body, wherein rubber materials flow downwards without agglomeration, accumulation and bridging in a feeding hopper. The four flexible rubber air bags distributed at intervals are contracted through exhaust or expanded through inflation on the inner wall side of the conical section of the feeding hopper, so that rubber materials in the conical section of the feeding hopper are disturbed or pushed by linkage, and the problem that the rubber materials are agglomerated and stacked into an arch bridge shape in the conical section of the feeding hopper to cause material bridging is solved. Due to the fact that the flexible rubber air bag is installed on the inner wall of the conical section of the feeding hopper and contracts or expands, the situation that rubber materials are extruded to be adhered to the inner wall of the feeding hopper is avoided.

Description

Technical Field

[0001] This invention relates to an outer rubber extrusion mold for a rubber tube, belonging to the technical field of rubber extrusion molds. Background Technology

[0002] Rubber hoses are used in automotive braking systems, hydraulic equipment, building water supply and drainage, and other fields as key components for fluid transportation and sealing protection. Their outer rubber layer must have the characteristics of wear resistance, aging resistance and pressure resistance. Rubber raw materials are usually fed into the extrusion mold through the feed hopper and extruded into shape.

[0003] The feed hopper often adopts a straight cylinder plus conical structure design (see Chinese Patent Announcement No. CN201659680U). When processing high-filled rubber or reclaimed rubber, such rubber has poor flowability and strong agglomeration. It is easy to form agglomerates in the conical section of the feed hopper, resulting in bridging. This causes the rubber to accumulate in the conical section of the feed hopper and form an arch bridge shape, making it unable to fall smoothly.

[0004] Although the prior art (see Chinese Patent Application Publication No. CN118899130A) installs a stirring component in the middle area of ​​the feed hopper, which can agitate the adhesive and guide it downward, the end of the stirring rod of the stirring component will squeeze the adhesive and stick it to the inner wall of the feed hopper when it rotates. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention provides an outer rubber extrusion mold for rubber tubes.

[0006] The present invention is achieved through the following technical solutions.

[0007] The present invention provides an outer rubber extrusion mold for a rubber tube, comprising: The outer rubber extrusion die prevents the rubber compound from agglomerating, accumulating, or bridging within the feed hopper and allows it to flow downwards.

[0008] The inner wall of the feed hopper cone section is equipped with flexible rubber airbags that generate adsorption disturbance or compression pushing. The flexible rubber airbags are four spaced apart on the inner wall of the feed hopper cone section. The four spaced flexible rubber airbags contract by degassing or expand by inflating.

[0009] It also includes an extrusion die, with a feed hopper installed at the die inlet.

[0010] It also includes a mold support platform with a fixed base on top, and the extrusion mold is installed on top of the fixed base.

[0011] The flexible rubber airbag is fixed to the outside of a mounting frame, which is then fixed to the inner wall of the feed hopper cone section by bolts.

[0012] All four flexible rubber airbags are connected to connecting air tubes, and the four connecting air tubes are connected and merged through an annular tube; the annular tube is connected to a negative pressure generator that provides a negative pressure environment through an air extraction tube; the side of the annular tube opposite to the air extraction tube is connected to an air pump that supplies gas through an air supply tube, and a solenoid valve that controls the opening and closing of the air supply tube is installed on the air supply tube.

[0013] The solenoid valve housing is fixedly mounted on the fixed base by a support plate; the negative pressure generator is mounted on the support platform.

[0014] The air pump is mounted on the mold support platform; the air pump inlet is equipped with a filter cover to filter the drawn-in air.

[0015] It also includes a control box installed on the mold support platform; the control box provides electrical control for the negative pressure generator, air pump, and solenoid valve.

[0016] The beneficial effects of this invention are as follows: Four spaced-apart flexible rubber airbags, through degassing and contraction or inflation and expansion on the inner wall of the feed hopper cone section, cause disturbance or propulsion of the rubber material within the cone section, thus solving the problem of material bridging caused by agglomeration and accumulation forming arches within the feed hopper cone section. Because the flexible rubber airbags are installed on the inner wall of the feed hopper cone section and perform contraction or expansion, there is no situation where squeezed rubber material adheres to the inner wall of the feed hopper. Attached Figure Description

[0017] Figure 1 This is a schematic diagram illustrating the structure of the negative pressure generator's distributed installation positions according to the present invention; Figure 2 This is a schematic diagram showing the distribution and installation positions of the air pump and solenoid valve according to the present invention; Figure 3 This is a schematic diagram of the structure of the flexible rubber airbag and the annular tube of the present invention. Figure 4 This is a schematic diagram of the structure of the flexible rubber airbag and connecting air tube of the present invention; In the diagram: 1-Die support platform; 2-Fixed base; 3-Extrusion die; 4-Feed hopper; 5-Control box; 6-Air pump; 7-Negative pressure generator; 8-Ejection pipe; 9-Annular pipe; 10-Flexible rubber airbag; 11-Connecting air pipe; 12-Solenoid valve; 13-Air supply pipe; 14-Support plate; 15-Filter cover; 16-Mounting frame. Detailed Implementation

[0018] The technical solution of the present invention is further described below, but the scope of protection is not limited to what is described.

[0019] like Figures 1 to 4 As shown.

[0020] This application discloses an outer rubber extrusion mold for a rubber tube, comprising: A mold support platform 1 provides a supporting foundation for the entire device. A fixed seat 2 is installed on the top of the mold support platform 1, and an extrusion mold 3 is installed on the top of the fixed seat 2.

[0021] It also includes a feed hopper 4 installed at the feed inlet of the extrusion die 3, from which the rubber material enters the extrusion die 3.

[0022] The inner wall of the 4th conical section of the feed hopper is equipped with flexible rubber airbags 10 that generate adsorption disturbance or compression pushing. There are four flexible rubber airbags 10 spaced apart on the inner wall of the 4th conical section of the feed hopper. The four spaced flexible rubber airbags 10 generate adsorption disturbance or compression pushing effect on the rubber material in the 4th conical section of the feed hopper by degassing and contracting or inflating, so as to prevent the rubber material from agglomerating and accumulating into an arch bridge shape in the 4th conical section of the feed hopper and causing material bridging.

[0023] Four spaced-apart flexible rubber airbags 10, by deflating or inflating on the inner wall of the fourth conical section of the feed hopper, agitate or push the rubber material within the section, thus solving the problem of material bridging caused by agglomeration and arching within the fourth conical section. Because the flexible rubber airbags 10 are installed on the inner wall of the fourth conical section of the feed hopper and their contraction or expansion action prevents the squeezed rubber material from sticking to the inner wall of the feed hopper.

[0024] The flexible rubber airbag 10 is fixed to the outside of the mounting frame 16, which is fixed to the inner wall of the cone section of the feed hopper 4 by bolts.

[0025] Each of the four flexible rubber airbags 10 is connected to a connecting air tube 11, and the four connecting air tubes 11 are connected and merged through an annular tube 9; the annular tube 9 is connected to a negative pressure generator 7 through an air extraction tube 8, and the negative pressure generator 7 can be configured to provide a negative pressure environment; the side of the annular tube 9 opposite to the air extraction tube 8 is connected to an air pump 6 that supplies gas through an air supply tube 13, and a solenoid valve 12 that controls the opening and closing of the air supply tube 13 is installed on the air supply tube 13.

[0026] The housing of the solenoid valve 12 is fixedly mounted on the fixed base 2 via the support plate 14. The negative pressure generator 7 is mounted on the support platform 1; the negative pressure generator 7 draws air from the annular pipe 9 through the air extraction pipe 8, so that a negative pressure is formed in the annular pipe 9 and the flexible rubber airbag 10, causing the flexible rubber airbag 10 to contract.

[0027] The air pump 6 is mounted on the mold support platform 1. The air inlet of the air pump 6 is equipped with a filter cover 15 to filter the drawn-in air; after the air pump 6 draws in outside air and filters it through the filter cover 15, it delivers air to the annular pipe 9 through the air supply pipe 13, causing the flexible rubber airbag 10 to inflate.

[0028] It also includes a control box 5 installed on the mold support platform 1. The control box 5 has control modules such as PLC to electrically control electrical equipment such as negative pressure generator 7, air pump 6 and solenoid valve 12.

[0029] The rubber material enters the extrusion die 3 from the feed hopper 4. When it is necessary to prevent the rubber material from bridging, the control box 5 controls the negative pressure generator 7 to start. The negative pressure generator 7 draws air from the annular pipe 9 through the air extraction pipe 8, forming a negative pressure in the annular pipe 9. This causes the air in the multiple flexible rubber airbags 10 to be drawn out, and the flexible rubber airbags 10 contract. The contracted flexible rubber airbags 10 have a certain adsorption and disturbance effect on the material on the inner wall of the feed hopper 4, breaking the bridging structure that the material may form, so that the material can flow smoothly downward.

[0030] The control box 5 controls the air pump 6 to start and simultaneously controls the solenoid valve 12 to open. Air is delivered to the annular pipe 9 through the air supply pipe 13, and then enters multiple flexible rubber air bags 10 through multiple connecting air pipes 11. This causes the flexible rubber air bags 10 to expand. The expanded flexible rubber air bags 10 exert a squeezing and pushing effect on the material in the feed hopper 4, further promoting the downward flow of the material and preventing material bridging.

Claims

1. A rubber extrusion mold for the outer layer of a rubber tube, characterized in that, include: The outer rubber extrusion die prevents the rubber compound from agglomerating, accumulating, or bridging within the feed hopper (4) and allows it to flow downwards.

2. The outer rubber extrusion mold for the rubber tube as described in claim 1, characterized in that: The inner wall of the cone section of the feed hopper (4) is equipped with flexible rubber airbags (10) that generate adsorption disturbance or extrusion push. The flexible rubber airbags (10) are four spaced apart on the inner wall of the cone section of the feed hopper (4). The four spaced flexible rubber airbags (10) shrink by exhaust or expand by inflation.

3. The outer rubber extrusion mold for the rubber tube as described in claim 2, characterized in that: It also includes an extrusion die (3), and a feed hopper (4) is installed at the feed inlet of the extrusion die (3).

4. The outer rubber extrusion mold for the rubber tube as described in claim 3, characterized in that: It also includes a mold support platform (1) with a fixed base (2) mounted on top, and an extrusion mold (3) mounted on top of the fixed base (2).

5. The outer rubber extrusion mold for the rubber tube as described in claim 2, characterized in that: The flexible rubber airbag (10) is fixed with an installation frame (16) on the outside, and the installation frame (16) is fixed to the inner wall of the cone section of the feed hopper (4) by bolts.

6. The outer rubber extrusion mold for the rubber tube as described in claim 2, characterized in that: All four flexible rubber airbags (10) are connected to connecting air tubes (11), and the four connecting air tubes (11) are connected and merged through an annular tube (9); the annular tube (9) is connected to a negative pressure generator (7) that provides a negative pressure environment through an air extraction tube (8); the side of the annular tube (9) opposite to the air extraction tube (8) is connected to an air pump (6) that supplies gas through an air supply tube (13), and a solenoid valve (12) that controls the opening and closing of the air supply tube (13) is installed on the air supply tube (13).

7. The outer rubber extrusion mold for the rubber tube as described in claim 6, characterized in that: The housing of the solenoid valve (12) is fixedly mounted on the fixed base (2) by the support plate (14); the negative pressure generator (7) is mounted on the support platform (1).

8. The outer rubber extrusion mold for the rubber tube as described in claim 6, characterized in that: The air pump (6) is installed on the mold support platform (1); the air inlet of the air pump (6) is equipped with a filter cover (15) for filtering the drawn-in air.

9. The outer rubber extrusion mold for the rubber tube as described in claim 6, characterized in that: It also includes a control box (5) installed on the mold support platform (1), which provides electrical control over the negative pressure generator (7), the air pump (6), and the solenoid valve (12).

Images