Silicon core pipe membrane head air draft cooling mechanism

Abstract

The utility model relates to the field of pipe blow molding, and particularly discloses a silicon core pipe film head air draft cooling mechanism which comprises a cooling cylinder, and the cooling cylinder and a mold are coaxially arranged. The end parts of the plurality of cold air pipes are communicated with the cooling cylinder; the end parts of the plurality of exhaust pipes are communicated with the cooling cylinder; and the sealing plates are detachably installed at the end, away from the mold, of the cooling cylinder, through holes allowing the silicon core pipes of different diameter specifications to penetrate through are formed in the centers of the sealing plates, and the diameters of the through holes in the sealing plates are different. According to the scheme, air in the cooling cylinder is sucked by the exhaust pipes, and the cold air pipes can be matched with the exhaust pipes in a dispersed mode, so that cold air in the cold air pipes can slowly enter the cooling cylinder, airflow with large impact force is not likely to be generated, the silicon core pipe makes contact with the cold air more evenly in the circumferential direction in the cooling process, deformation is not likely to be generated, and the service life of the silicon core pipe is prolonged. And the cooling forming precision of the silicon core pipe is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe blow molding, in particular to an air extraction and cooling mechanism for a silicon core pipe die head. Background Art

[0002] A silicon core pipe (HDPE silicon core pipe) is a high-density polyethylene pipe with a layer of silica solid lubricant coated on its inner wall. Due to its excellent physical and mechanical properties and low friction coefficient, the silicon core pipe is widely used in optical cable communication network systems. The production process of the silicon core pipe includes steps such as raw material preparation, extrusion molding, cooling, cutting, and packaging.

[0003] During the extrusion molding process of the silicon core pipe, it is necessary to synchronously cool and shape the extruded silicon core pipe. When performing air cooling, the air flow generally impacts on the surface of the silicon core pipe. It is easy for the air flow to impact unevenly on the surface of the silicon core pipe, resulting in uneven cooling of the silicon core pipe, causing uneven stress on the surface of the silicon core pipe, and further affecting the mechanical properties and service life of the silicon core pipe; at the same time, during the air cooling process, the air flow can generally only impact on the surface of the silicon core pipe, and it is difficult for the inside of the silicon core pipe to cool down quickly, resulting in low cooling efficiency of the silicon core pipe. Summary of the Utility Model

[0004] Aiming at the deficiencies in the prior art, the utility model provides an air extraction and cooling mechanism for a silicon core pipe die head to solve the problem that the air flow is easy to impact unevenly on the surface of the silicon core pipe, resulting in uneven cooling of the silicon core pipe and easy deformation.

[0005] To achieve the above purpose, the basic scheme of the utility model is as follows: An air extraction and cooling mechanism for a silicon core pipe die head, comprising:

[0006] A cooling cylinder, which is coaxially arranged with the mold;

[0007] A number of cold air pipes, the ends of which are communicated with the cooling cylinder;

[0008] A number of air extraction pipes, the ends of which are communicated with the cooling cylinder;

[0009] A number of sealing plates, which are detachably installed on the end of the cooling cylinder far from the mold. Through holes for silicon core pipes of different diameter specifications to pass through are provided at the centers of the number of sealing plates, and the diameters of the through holes on the number of sealing plates are all different.

[0010] The technical principle of the utility model is: Before cooling the silicon core pipe, first select the sealing plate with a through hole of the corresponding diameter size according to the diameter size of the silicon core pipe, so that the silicon core pipe can be accurately positioned and supported in the cooling cylinder, and the sealing plate can support the transmission of the silicon core pipe, so that the silicon core pipe is uniformly cooled by the cold air in the cooling cylinder during the transmission process.

[0011] During the cooling and shaping process, the air extraction pipe sucks the air inside the cooling cylinder. A number of cold air pipes can be scattered and matched with a number of air extraction pipes, so that the cold air in the cold air pipes can slowly enter the cooling cylinder, and it is not easy to generate airflows with large impact forces. This makes the circumferential contact between the silicon core pipe and the cold air more uniform during the cooling process, not easy to generate deformation, and improves the cooling and forming accuracy of the silicon core pipe.

[0012] Furthermore, it also includes a support unit, and the support unit includes:

[0013] A support block, which is located between the cooling cylinder and the mold;

[0014] A number of support plates, which are vertically and fixedly installed on the support block. The support plates are connected to one end of the cooling cylinder close to the mold, and a transmission gap for silicon core pipes of different diameter specifications to pass through is formed between the a number of support plates.

[0015] Through the above settings, the support block and a number of support plates cooperate to stably support the cooling cylinder; at the same time, the transmission gap formed by a number of support plates can also support and limit the transmission of the silicon core pipe to a certain extent, so that the part of the silicon core pipe inside the cooling cylinder remains more horizontal and stable.

[0016] Furthermore, it also includes a number of cold air blocks, and a cold air cavity is provided inside the cold air blocks; a first installation hole for the cold air blocks to pass through and be installed is radially penetrated on the side wall of the cooling cylinder, a number of cold air pipes are communicated with the cold air cavity of the cold air blocks, and the cold air cavity is communicated with the cooling cylinder.

[0017] Through the above settings, when sucking the air inside the cooling cylinder, the cold air in the cold air pipes can first slowly enter the cold air cavity of the cold air blocks, and the cold air cavity can diffuse the cold air, so that the cold air is more stably transported to the cooling cylinder and is not easy to impact the outer wall of the silicon core pipe.

[0018] Furthermore, it also includes an air extraction block. A second installation hole for the air extraction block to pass through and be installed is radially penetrated on the side wall of the cooling cylinder, and a number of air extraction pipes pass through the air extraction block and are communicated with the cooling cylinder.

[0019] Through the above settings, the air extraction block can provide stable support for the installation of a number of air extraction pipes, making the layout of the air extraction pipes more stable.

[0020] Furthermore, the cold air blocks are in clearance fit with the first installation holes, and the air extraction block is slidably connected to the inner wall of the first installation holes; the air extraction block is in clearance fit with the second installation holes, and the air extraction block is slidably connected to the inner wall of the second installation holes.

[0021] With the above settings, the relative distances between the cold air blocks and the air extraction blocks and the axis of the cooling cylinder can be controlled radially along the cooling cylinder, and further, the relative distances between the end of the air extraction pipe and the cold air pipe and the outer wall of the silicon core pipe can be controlled, so that the cold air can more precisely surround the outer wall of the silicon core pipe with different diameter specifications, improving the cooling and shaping efficiency of the silicon core pipe.

[0022] Furthermore, several cold air blocks are evenly arranged circumferentially around the cooling cylinder, and several air extraction blocks are also evenly arranged circumferentially around the cooling cylinder, and there is exactly one cold air block between two adjacent cold air blocks.

[0023] With the above settings, the entry of cold air and the extraction of air are more uniform, the temperature of the cold air surrounding the outer wall of the silicon core pipe is also more uniform, improving the uniformity during the cooling of the silicon core pipe and the precision of the silicon core pipe.

[0024] Furthermore, a cooling and heat preservation layer is fixedly arranged on the inner wall of the cooling cylinder.

[0025] With the above settings, the cooling cylinder and the cooling and heat preservation layer can retain the cold air and insulate it from the outside, enabling the silicon core pipe located in the cooling cylinder to fully exchange heat with the cold air and improving the cooling efficiency of the silicon core pipe. Description of the Drawings

[0026] Figure 1 It is a schematic structural diagram in the axonometric direction of a silicon core pipe film head air extraction and cooling mechanism in an embodiment of the present invention.

[0027] Figure 2 It is a schematic structural diagram in the front view direction of a silicon core pipe film head air extraction and cooling mechanism in an embodiment of the present invention.

[0028] Figure 3 It is Figure 1 a cross-sectional view of the vertical central plane at the cooling cylinder in

[0029] In the above-mentioned drawings: mold 10, cooling cylinder 20, first installation hole 201, second installation hole 202, cooling and heat preservation layer 203, cold air pipe 40, air extraction pipe 50, sealing plate 60, perforation 601, cold air block 70, cold air cavity 701, air extraction block 80, support block 901, support plate 902. Detailed Embodiment

[0030] The technical solutions in the present invention will be further described below in conjunction with the drawings and embodiments.

[0031] This embodiment is basically as Figure 1 , Figure 2 and Figure 3As shown in the figure, an air extraction and cooling mechanism for a silicon core tube film head according to an embodiment of the present invention includes a cooling cylinder 20, a plurality of cold air pipes 40, a plurality of air extraction pipes 50, a sealing plate 60, a support unit, three cold air blocks 70, and three air extraction blocks 80. The cooling cylinder 20 is coaxially arranged with the mold 10. At the same time, the support unit includes a support block 901 and two support plates 902. The support block 901 is fixedly supported between the cooling cylinder 20 and the mold 10 by bolts. The support plates 902 are vertically and fixedly installed on the support block 901. The support plates 902 are connected to one end of the cooling cylinder 20 close to the mold 10. A transmission gap for silicon core tubes of different diameter specifications to pass through is formed between the plurality of support plates 902.

[0032] As Figure 1 and 3 shown, a cold air cavity 701 is provided in the cold air block 70. A first installation hole 201 for the cold air block 70 to pass through and be installed is radially penetrated on the side wall of the cooling cylinder 20. A plurality of cold air pipes 40 are communicated with the cold air cavity 701 of the cold air block 70. The cold air cavity 701 is communicated with the cooling cylinder 20. The side wall of the cold air cavity 701 of the cold air block 70 is in an inclined shape, and the width of the cold air cavity 701 of the cold air block 70 close to the axis of the cooling cylinder 20 is greater than the width of the cold air cavity 701 of the cold air block 70 away from the axis of the cooling cylinder 20, realizing the external diffusion of cold air.

[0033] At the same time, as Figure 1 and 3 shown, a second installation hole 202 for the air extraction block 80 to pass through and be installed is radially penetrated on the side wall of the cooling cylinder 20. A plurality of air extraction pipes 50 pass through the air extraction block 80 and are communicated with the cooling cylinder 20. At the same time, the cold air block 70 is in clearance fit with the first installation hole 201, and the air extraction block 80 is slidably connected to the inner wall of the first installation hole 201. The air extraction block 80 is in clearance fit with the second installation hole 202, and the air extraction block 80 is slidably connected to the inner wall of the second installation hole 202. The three cold air blocks 70 are evenly arranged around the circumference of the cooling cylinder 20. The three air extraction blocks 80 are also evenly arranged around the circumference of the cooling cylinder 20, and there is exactly one air extraction block 80 between two adjacent cold air blocks 70.

[0034] As Figure 1 and Figure 3 shown, the sealing plate 60 is detachably installed on the right end of the cooling cylinder 20 by bolts. A through hole 601 for silicon core tubes of different diameter specifications to pass through is provided at the center of the plurality of sealing plates 60. The diameters of the through holes 601 on the plurality of sealing plates 60 are all different.

[0035] In addition, as Figure 2 and 3 shown, a cooling and heat preservation layer 203 is fixedly adhered to the inner wall of the cooling cylinder 20. The end of the cold air pipe 40 away from the cooling cylinder 20 is communicated with a refrigerator, and the end of the air extraction pipe 50 away from the cooling cylinder 20 is communicated with a negative pressure pump.

[0036] When the air extraction and cooling mechanism of the silicon core tube film head in this embodiment is in use, first select the sealing plate 60 with a perforation 601 of a corresponding diameter according to the diameter of the silicon core tube, and install the corresponding sealing plate 60 on the right end of the cooling cylinder 20 by bolts, so that the silicon core tube can be accurately positioned and supported in the cooling cylinder 20, and the sealing plate 60 can support the transmission of the silicon core tube, so that the silicon core tube is evenly cooled by the cold air in the cooling cylinder 20 during the transmission process.

[0037] When cooling and shaping the silicon core tube, start the refrigerator and the negative pressure pump. The refrigerator transmits the cooled air to the cold air pipe 40, and the negative pressure pump sucks the air in the cooling cylinder 20 through the air extraction pipe 50, so that the cold air in the cold air pipe 40 can slowly enter the cold air cavity 701 of the cold air block 70 first. The cold air cavity 701 can diffuse the cold air to avoid the cold air impacting the silicon core tube that is not fully shaped, reducing the impact force on the silicon core tube; at the same time, because the three cold air blocks 70 and the three cold air blocks 70 are evenly arranged around the circumference of the cooling cylinder 20, the suction of the hot air and the diffusion of the cold air are not likely to generate a large-impact airflow, making the silicon core tube contact the cold air more evenly in the circumferential direction during the cooling process, not easily deforming, and improving the cooling and forming accuracy of the silicon core tube; at the same time, during this process, the cooling cylinder 20 and the cooling insulation layer 203 can retain the cold air and insulate from the outside, so that the silicon core tube located in the cooling cylinder 20 can fully exchange heat with the cold air, improving the cooling efficiency of the silicon core tube.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A silicon core tube membrane head exhaust cooling mechanism, characterized in that: include: A cooling cylinder, wherein the cooling cylinder is coaxially arranged with the mold; A plurality of cold air pipes, the ends of which are connected to the cooling cylinder; A plurality of exhaust pipes, the ends of which are connected to the cooling cylinder; A plurality of sealing plates are detachably mounted on one end of the cooling cylinder away from the mold. A plurality of sealing plates are provided at their centers with through holes for silicon core tubes of different diameters to pass through. The diameters of the through holes on the plurality of sealing plates are all different.

2. A silicon core tube membrane head exhaust cooling mechanism as claimed in claim 1, characterized in that: Also included is a support unit, the support unit comprising: A support block, the support block being located between the cooling cylinder and the mold; A plurality of support plates are vertically fixedly mounted on the support block, the support plates are connected to one end of the cooling cylinder close to the mold, and transmission gaps are formed between the plurality of support plates for silicon core tubes of different diameters to pass through.

3. A silicon core tube membrane head exhaust cooling mechanism as claimed in claim 2, characterized in that: It also includes a plurality of cold air blocks, each of which has a cold air cavity. A first mounting hole for the cold air block to pass through and install is radially penetrated on the side wall of the cooling cylinder. The plurality of cold air pipes are connected to the cold air cavity of the cold air block, and the cold air cavity is connected to the cooling cylinder.

4. A silicon core tube membrane head exhaust cooling mechanism as claimed in claim 3, characterized in that: It also includes an exhaust block, and a second installation hole for the exhaust block to pass through and install is radially penetrated on the side wall of the cooling cylinder, and a plurality of the exhaust pipes pass through the exhaust block and are connected to the cooling cylinder.

5. A silicon core tube membrane head exhaust cooling mechanism as claimed in claim 4, characterized in that: The cooling block is loosely matched with the first mounting hole, and the exhaust block is slidably connected to the inner wall of the first mounting hole; the exhaust block is loosely matched with the second mounting hole, and the exhaust block is slidably connected to the inner wall of the second mounting hole.

6. A silicon core tube membrane head exhaust cooling mechanism as claimed in claim 5, characterized in that: A plurality of the cooling air blocks are evenly arranged around the circumference of the cooling cylinder, and a plurality of the cooling air blocks are also evenly arranged around the circumference of the cooling cylinder, and there is one and only one cooling air block between two adjacent cooling air blocks.

7. A silicon core tube membrane head exhaust cooling mechanism as claimed in any one of claims 1 to 6, characterized in that: A cooling and heat-insulating layer is fixedly arranged on the inner wall of the cooling cylinder.

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