Perforated plate device for plastic extruder

Abstract

The utility model discloses a perforated plate device for a plastic extruder, which relates to the technical field of cable production extruders and comprises a cylinder and a headstock, a first conical flange and a second conical flange are respectively fixed at opposite ends of the cylinder and the headstock, and a first clamping groove and a second clamping groove are respectively arranged on opposite sides of the first conical flange and the second conical flange. A perforated plate is clamped between the first clamping groove and the second clamping groove, second grooves are formed in the opposite sides of the perforated plate, graphite packing rings are clamped to the inner sides of the two second grooves, the opposite sides of the two graphite packing rings abut against the inner wall of the first clamping groove and the inner wall of the second clamping groove respectively, and clamping devices are installed on the outer side of the first conical flange and the outer side of the second conical flange. By using the device, the problem of material leakage of connection sealing surfaces of the perforated plate, the machine barrel and the machine head seat can be greatly reduced, the extrusion quality of a product is improved, material waste is reduced, and the production cost of a cable is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of cable production extruders, and more specifically to a porous plate device for a plastic extruder. Background Art

[0002] The porous plate used in plastic extruder is also called sieve plate or diverter plate, which is in the shape of a flat plate. It is usually used in combination with a filter screen, which is supported by the porous plate and installed at the front end of the barrel. The function of the diverter plate is to change the molten plastic from rotational motion to linear motion, and to prevent impurities and unplasticized substances from passing through, and to increase the resistance of the plastic to advance, so that the plasticization quality of the plastic in the barrel is improved, and the plastic extrusion package is more compact.

[0003] The barrel and headstock of the plastic extruder are connected by a clamping device. The porous plate is clamped in the mounting holes of the barrel and the headstock, and the clamping device is tightened with bolts. As the equipment ages and the startup time increases, the various parts of the clamping device expand slightly due to heating; coupled with the different materials of the connecting parts, the expansion degree after heating is also different; resulting in an increase in the gap between the porous plate and the barrel and the headstock connection sealing surface, the molten plastic with great pressure in the barrel will leak out through the sealing surface gap, and the leakage will become larger and larger. This will not only cause the pressure in the barrel to decrease, resulting in insufficient glue output from the headstock, affecting product quality, but also cause a large amount of material waste. Therefore, it is necessary to design a porous plate to solve the problem of material leakage at the connection between the barrel and the headstock. Utility Model Content

[0004] The purpose of the utility model is to solve the above-mentioned technical problems. The utility model provides a porous plate device for a plastic extruder. After adopting the device, the problem of material leakage at the sealing surfaces connecting the porous plate, the barrel and the head seat can be eliminated, which not only improves the extrusion quality of the product, but also reduces material waste and effectively reduces the production cost of the cable.

[0005] In order to achieve the above-mentioned purpose, the utility model specifically adopts the following technical scheme: a porous plate device for a plastic extruder, comprising a barrel and a head seat, wherein a conical flange 1 and a conical flange 2 are fixed to opposite ends of the barrel and the head seat respectively, a clamping groove 1 and a clamping groove 2 are respectively provided on opposite sides of the conical flange 1 and the conical flange 2, a porous plate is clamped between the clamping groove 1 and the clamping groove 2, a groove 2 is provided on the opposite side of the porous plate, a graphite packing ring is clamped on the inner side of the two grooves 2, and the opposite sides of the two graphite packing rings are respectively abutted against the inner walls of the clamping groove 1 and the clamping groove 2; a clamping device is installed on the outer side of the conical flange 1 and the conical flange 2.

[0006] In order to facilitate the extrusion of molten plastic by the head of the extrusion screw, a porous plate device for a plastic extruder of the utility model is preferably provided with inner hole one and inner hole two inside the barrel and the head seat respectively, and the apertures of inner hole one and inner hole two are the same; a groove one is provided on the side of the porous plate close to the barrel, and the inner diameter of the groove one is the same as the aperture of the inner hole one.

[0007] In order to facilitate the installation and removal of the porous plate, as a preferred embodiment of the porous plate device for a plastic extruder of the utility model, a groove three is arranged around the outer side of the porous plate, and the groove three is located between the conical flange one and the conical flange two.

[0008] In order to ensure that the molten plastic passing through multiple holes changes from rotational motion to linear motion, and the flow rate of the molten plastic after passing through the holes is the same, as a preferred porous plate device for a plastic extruder of the utility model, a plurality of evenly distributed holes are opened on the surface of the porous plate, and the opening rate is 30%-40%.

[0009] In order to enhance the sealing performance of both end surfaces of the porous plate, as a preferred embodiment of the porous plate device for a plastic extruder of the utility model, the graphite packing ring is specifically a flexible graphite packing ring, and the thickness of the graphite packing ring is greater than the depth of the two grooves.

[0010] In order to facilitate the fixing and disassembly of the porous plate and timely adjust the clamping device to ensure that the sealing surface does not leak material, as a preferred porous plate device for a plastic extruder of the utility model, the clamping device includes two semi-circular rings, hinges are installed at the opposite ends of the two semi-circular rings, bolts are installed through the other ends of the two semi-circular rings, the inner circles of the two semi-circular rings are provided with conical grooves, and the conical flange one and the conical flange two are clamped with the inner sides of the two conical grooves.

[0011] The beneficial effects of the utility model are as follows:

[0012] 1. A porous plate is installed between the barrel and the headstock, and the two end faces of the porous plate are limited by the first and second grooves. Two graphite packing rings are respectively matched with the gaps of the first and second grooves. The graphite packing rings are specifically flexible graphite packing rings, and the thickness of the graphite packing rings is greater than the depth of the two grooves. Therefore, during operation, even if the pressing force decreases slightly, the rebound of the graphite packing ring can still maintain a certain sealing pressure ratio, and the sealing of the end face can continue to be maintained;

[0013] 2. The porous plate device for plastic extruder has a simple structure, is easy to make, easy to install and use, and has the advantages of being easy to promote and install. By using this device, the problem of material leakage on the sealing surfaces connecting the porous plate, the barrel and the head seat can be greatly reduced, which not only improves the extrusion quality of the product, but also reduces material waste and effectively reduces the production cost of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is an overall cross-sectional schematic diagram of the utility model;

[0015] Figure 2 yes Figure 1 AA direction cross-sectional diagram;

[0016] Figure 3 yes Figure 1 Schematic diagram of point B;

[0017] Figure 4 It is a cross-sectional schematic diagram of the porous plate of the utility model.

[0018] Figure numerals: 1, barrel; 101, conical flange one; 102, slot one; 103, inner hole one; 2, head seat; 201, conical flange two; 202, slot two; 203, inner hole two; 3, porous plate; 301, groove one; 302, groove two; 303, groove three; 304, eyelet; 4, graphite packing ring; 5, clamping device; 501, semicircular ring; 5011, conical groove; 502, hinge; 503, bolt. DETAILED DESCRIPTION

[0019] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

[0020] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0021] See also Figure 1-4 The utility model provides the following technical solutions: a porous plate device for a plastic extruder, comprising a barrel 1 and a head seat 2, wherein a conical flange 101 and a conical flange 201 are fixed to opposite ends of the barrel 1 and the head seat 2, respectively, a clamping groove 102 and a clamping groove 202 are respectively provided on opposite sides of the conical flange 101 and the conical flange 201, a porous plate 3 is clamped between the clamping groove 102 and the clamping groove 202, a groove 2 302 is provided on the opposite side of the porous plate 3, a graphite packing ring 4 is clamped on the inner side of the two grooves 2 302, and the opposite sides of the two graphite packing rings 4 are respectively abutted against the inner walls of the clamping groove 102 and the clamping groove 202; a clamping device 5 is installed on the outer side of the conical flange 101 and the conical flange 201.

[0022] In this embodiment: a porous plate 3 is installed between the barrel 1 and the head seat 2, and the two end surfaces of the porous plate 3 are limited by the slot 102 and the slot 2 202. Two graphite packing rings 4 are respectively matched with the slot 102 and the slot 2 202. The graphite packing ring 4 is specifically a flexible graphite packing ring, which is specifically formed by winding a graphite strip around a stainless steel wire mesh and molding it. The surface is then treated with a lubricant, graphite powder and corrosion inhibitor. Sufficient sealing pressure ratio can be generated on the pressing surface to prevent leakage of the medium, and the thickness of the graphite packing ring 4 is greater than the depth of the two grooves 2 302. Therefore, during operation, even if the pressing force decreases slightly, the graphite packing ring 4 can still maintain a certain sealing pressure ratio due to the rebound, and the sealing of the end face can continue to be maintained.

[0023] As a technical optimization scheme of the utility model, the barrel 1 and the headstock 2 are respectively provided with an inner hole 103 and an inner hole 203, the apertures of the inner hole 103 and the inner hole 203 are the same, and a groove 301 is provided on the side of the porous plate 3 close to the barrel 1, and the inner diameter of the groove 301 is the same as the aperture of the inner hole 103.

[0024] In this embodiment: if the aperture of groove 101 is too large, molten plastic will be easily accumulated, making the heat-sensitive components easy to decompose. However, if the aperture of groove 101 is too small, it will be unfavorable for the spirally moving molten material to pass through the porous plate evenly. Therefore, the inner diameter of groove 101 is the same as the aperture of inner hole 103, which makes it easier for the head of the extrusion screw to extrude the molten plastic.

[0025] As a technical optimization solution of the utility model, a groove three 303 is arranged around the outer side of the porous plate 3 , and the groove three 303 is located between the conical flange one 101 and the conical flange two 201 .

[0026] In this embodiment, a groove 303 is arranged around the outer side of the porous plate 3 to facilitate the staff to install and remove the porous plate 3.

[0027] As a technical optimization solution of the utility model, a plurality of evenly distributed holes 304 are opened on the surface of the porous plate 3, and the opening rate is 30%-40%.

[0028] In this embodiment, the opening rate of the porous plate 3 ensures that the molten plastic passing through the plurality of holes 304 not only changes the rotational motion into a linear motion, but also makes the flow rate of the molten plastic after passing through the holes the same.

[0029] As a technical optimization solution of the utility model, the clamping device 5 includes two semicircular bodies 501, a hinge 502 is installed at one opposite end of the two semicircular bodies 501, a bolt 503 is installed through the other opposite end of the two semicircular bodies 501, and the inner circles of the two semicircular bodies 501 are provided with a conical groove 5011, and the conical flange 1 101 and the conical flange 2 201 are clamped with the inner sides of the two conical grooves 5011.

[0030] In this embodiment: the two conical grooves 5011 of the clamping device 5 and the matching sections of the barrel 1 and the headstock 2 are all clearance-matched. After installing the clamping device 5, tighten the bolts 503 to fasten the porous plate 3, the headstock 2 and the clamping device 5 to the conical flange at the front end of the barrel 1.

[0031] The use process of this utility model:

[0032] 1. According to the dimensions of the installed extruder barrel 1, headstock 2 and clamping device 5, and in combination with the above technical solution, a drawing of a porous plate device assembly for a plastic extruder that meets actual needs is designed.

[0033] 2. According to the designed drawings of the porous plate device assembly, the porous plate 3 that meets the actual needs is processed, and a plurality of graphite packing rings 4 that meet the technical requirements are purchased or customized.

[0034] 3. According to the requirements of the porous plate assembly drawing, two commercially available customizable graphite packing rings 4 are assembled onto the two outer sides of the processed porous plate 3 to complete the production of the porous plate assembly.

[0035] 4. After the equipment is shut down, the porous plate device can be installed between the barrel 1 and the headstock 2, and then the porous plate 3, the headstock 2 and the clamping device 5 can be fastened to the conical flange at the front end of the barrel 1 through the two conical grooves 5011 in the clamping device 5 and the tightened bolts 503.

[0036] 5. After the equipment is started normally, it is necessary to observe the sealing surface between the barrel 1 and the headstock 2 at any time, and adjust the bolt 503 of the clamping device 5 in time to ensure that the sealing surface does not leak.

[0037] 6. After the porous plate device is used for many times, if the graphite packing ring 4 is damaged or seriously damaged, the damaged graphite packing ring 4 needs to be replaced in time. When replacing the damaged graphite packing ring 4, it needs to be replaced in pairs, so that the sealing effect will be better.

[0038] 7. According to the different materials of the extruded plastic, the diameters of the multiple holes 304 with the same diameter on the processed porous plate 3 can be uniformly enlarged or reduced, so that the extruder extrusion is more stable, which can effectively improve the quality of the extruded product.

[0039] The technical solutions provided by the embodiments of the present invention are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the embodiments of the present invention. The description of the above embodiments is only applicable to help understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, according to the embodiments of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A perforated plate device for a plastic extruder, comprising a barrel (1) and a headstock (2), characterized in that: Conical flange 1 (101) and conical flange 2 (201) are fixed to opposite ends of the barrel (1) and the headstock (2), respectively; a clamping groove 1 (102) and a clamping groove 2 (202) are respectively provided on opposite sides of the conical flange 1 (101) and the conical flange 2 (201); a porous plate (3) is clamped between the clamping groove 1 (102) and the clamping groove 2 (202); a groove 2 (302) is provided on the opposite side of the porous plate (3); graphite packing rings (4) are clamped on the inner sides of the two grooves 2 (302); and the opposite sides of the two graphite packing rings (4) are respectively in contact with the inner walls of the clamping groove 1 (102) and the inner walls of the clamping groove 2 (202); and a clamping device (5) is installed on the outer sides of the conical flange 1 (101) and the conical flange 2 (201).

2. A perforated plate device for a plastic extruder according to claim 1, characterized in that: The barrel (1) and the headstock (2) are respectively provided with an inner hole one (103) and an inner hole two (203), the inner hole one (103) and the inner hole two (203) having the same aperture, and the porous plate (3) is provided with a groove one (301) on a side close to the barrel (1), the inner diameter of the groove one (301) being the same as the aperture of the inner hole one (103).

3. A perforated plate device for a plastic extruder according to claim 1, characterized in that: A groove three (303) is arranged around the outer side of the porous plate (3), and the groove three (303) is located between the conical flange one (101) and the conical flange two (201).

4. A perforated plate device for a plastic extruder according to claim 1, characterized in that: The surface of the porous plate (3) is provided with a plurality of evenly distributed holes (304), and the opening rate is 30%-40%.

5. A perforated plate device for a plastic extruder according to claim 1, characterized in that: The graphite packing ring (4) is specifically a flexible graphite packing ring, and the thickness of the graphite packing ring (4) is greater than the depth of the two grooves 2 (302).

6. A perforated plate device for a plastic extruder according to claim 1, characterized in that: The clamping device (5) comprises two semicircular rings (501), one opposite end of the two semicircular rings (501) is provided with a hinge (502), the other opposite end of the two semicircular rings (501) is penetrated with a bolt (503), the inner rings of the two semicircular rings (501) are provided with a conical groove (5011), and the conical flange 1 (101) and the conical flange 2 (201) are both clamped with the inner sides of the two conical grooves (5011).

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