PVC electrical pipe extrusion die

Abstract

The utility model belongs to the technical field of extrusion dies, and particularly relates to a PVC electrical pipe extrusion die. The device comprises a discharging outer sleeve piece, a flange connecting ring is arranged outside the discharging outer sleeve piece in a sleeving mode, one side of the flange connecting ring is connected with a first outer die sleeve, a second outer die sleeve is arranged on the other side of the first outer die sleeve, a feeding outer sleeve piece is arranged on the other side of the second outer die sleeve, and a discharging connecting rod is arranged in the discharging outer sleeve piece. The inner end of the discharging connecting rod is connected with a double-thread screw, the middle of the double-thread screw is sleeved with an auxiliary core mold, the other side of the auxiliary core mold is connected with the middle of a second outer mold sleeve, the double-thread screw is connected with the middle of the second outer mold sleeve, and meanwhile the middle of the other side of the second outer mold sleeve is clamped into a main core mold. And the mold is convenient to disassemble during maintenance or replacement, so that the labor capacity of workers is reduced, and the service life of the mold is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of extrusion dies and relates to a PVC electrician pipe extrusion die. Background Art

[0002] The extrusion method of a plastic extruder generally refers to melting plastic at a high temperature of about 200 °C, and the melted plastic is extruded into a shape when passing through a die. It is a method of continuously forming materials in a flowing state through a die in an extruder by heating and pressurizing, also known as "extrusion molding". Compared with other molding methods, it has the advantages of high efficiency and low unit cost. The extrusion method is mainly used for the molding of thermoplastic plastics and can also be used for certain thermosetting plastics. The existing PVC electrician pipe extrusion die has an integral part at the discharge die. After long-term use, plastic injection condensation and inner die core wear will occur inside, which is very inconvenient for maintenance, repair and replacement, increasing the labor intensity of workers and reducing the service life of the product. Therefore, a PVC electrician pipe extrusion die is proposed for the above problems. Content of the Utility Model

[0003] The purpose of the utility model is to provide a PVC electrician pipe extrusion die for the above problems.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A PVC electrician pipe extrusion die includes a discharge outer sleeve. A flange connection ring is sleeved outside the middle of the discharge outer sleeve, and a first outer die sleeve is provided on one side of the flange connection ring and the discharge outer sleeve. A second outer die sleeve is provided on the other side of the first outer die sleeve, and a feed outer sleeve is provided on the other side of the second outer die sleeve. A discharge connecting rod is inserted into the discharge outer sleeve, and a double-headed screw is inserted into the inner end of the discharge connecting rod. At the same time, a sub-core die is sleeved outside the middle of the double-headed screw. The other end of the double-headed screw is inserted into the main core die. The sub-core die is placed inside the first outer die sleeve, and one end of the sub-core die is clamped into the middle of one side of the second outer die sleeve. The main core die is placed inside the feed outer sleeve, and one end of the main core die is clamped into the middle of the other side of the second outer die sleeve.

[0006] In the above-mentioned PVC electrician pipe extrusion die, the flange connection ring is sleeved and slidably connected outside the middle of the discharge outer sleeve, and the outer wall of the discharge outer sleeve is closely attached to the inner wall of the flange connection ring. One side of the flange connection ring is fixedly connected to one side of the first outer die sleeve, and a screw is fixedly connected at the connection between the side surface of the flange connection ring and the side surface of the first outer die sleeve. One end of the discharge outer sleeve is clamped and fixedly connected inside the side surface of the first outer die sleeve, and a screw is inserted between the first outer die sleeve and the discharge outer sleeve.

[0007] In the above-mentioned PVC electrical conduit extrusion die, one side of the first outer die sleeve is fixedly connected to one side of the second outer die sleeve, and screws are provided at the connection between the first outer die sleeve and the second outer die sleeve. One side of the other side of the second outer die sleeve is fixedly connected to one side of the feeding outer sleeve, and screws are provided at the connection between the second outer die sleeve and the feeding outer sleeve.

[0008] In the above-mentioned PVC electrical conduit extrusion die, a discharge through-hole part is formed inside the discharge outer sleeve, and a discharge connecting rod is inserted into the discharge through-hole part. At the same time, the outer end of the discharge connecting rod extends beyond the side surface of the discharge outer sleeve, and there is a gap between the middle part of the discharge connecting rod and the inner wall of the discharge through-hole part.

[0009] In the above-mentioned PVC electrical conduit extrusion die, an inner stepped threaded hole part is formed at the inner end of the discharge connecting rod, and one end of a double-headed screw is inserted into the inner stepped threaded hole part. The middle part of the double-headed screw is sleeved with the middle part of the threaded connection sub-core die, and the other end of the double-headed screw passes through the sub-core die.

[0010] In the above-mentioned PVC electrical conduit extrusion die, one end of the sub-core die is clamped into the step of the inner stepped threaded hole part. A first inner cavity part is formed inside the first outer die sleeve, and there is a distance between the inner wall of the first inner cavity part and the outer wall of the sub-core die.

[0011] In the above-mentioned PVC electrical conduit extrusion die, a first stepped part is provided at the other end of the sub-core die. A connecting rib is fixedly connected to the middle part of the second outer die sleeve, and clamping parts are formed on both the upper and lower surfaces of the middle part of the connecting rib. At the same time, the first stepped part is clamped into the clamping parts.

[0012] In the above-mentioned PVC electrical conduit extrusion die, a threaded through-hole is formed inside the middle part of the connecting rib, and the other end of the double-headed screw is fixedly connected inside the threaded through-hole. A second stepped part is provided at one end of the main core die, and the second stepped part is clamped into the clamping parts.

[0013] In the above-mentioned PVC electrical conduit extrusion die, a feeding tapered hole part is formed inside the feeding outer sleeve, and there is a distance between the inner wall of the feeding tapered hole part and the outer wall of the main core die.

[0014] In the above-mentioned PVC electrical conduit extrusion die, a plurality of second inner cavity parts are formed between the inside of the second outer die sleeve and the connecting rib, and the plurality of second inner cavity parts equally divide the inside of the second outer die sleeve.

[0015] Compared with the existing technology, the advantages of the present utility model are as follows:

[0016] The utility model is provided with a flange connection ring outside the discharge outer sleeve, and one side of the flange connection ring is connected to the first outer mold sleeve. A second outer mold sleeve is provided on the other side of the first outer mold sleeve, and a feed outer sleeve is provided on the other side of the second outer mold sleeve. A discharge connecting rod is arranged inside the discharge outer sleeve, and the inner end of the discharge connecting rod is connected to a double-headed screw. A secondary core mold is sleeved outside the middle of the double-headed screw. The other side of the secondary core mold is connected to the middle of the second outer mold sleeve, and the double-headed screw is connected to the middle of the second outer mold sleeve. At the same time, the middle of the other side of the second outer mold sleeve is clamped into the main core mold. The connection is made by a segmented structure, and the structure is connected by screws, which is convenient for disassembly during maintenance, repair or replacement, reducing the labor intensity of workers and increasing the service life of the mold.

[0017] Other advantages, objectives and features of the utility model will be partially reflected by the following description, and partially will also be understood by those skilled in the art through the research and practice of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the overall left side view schematic diagram of the utility model;

[0019] Figure 2 is the overall right side view schematic diagram of the utility model;

[0020] Figure 3 is the overall explosion schematic diagram of the utility model;

[0021] Figure 4 is the overall sectional view schematic diagram of the utility model;

[0022] Figure 5 is the overall internal structure matching schematic diagram of the utility model.

[0023] In the figure: 1. Discharge outer sleeve; 101. Discharge through-hole part; 2. Flange connection ring; 3. First outer mold sleeve; 301. First inner cavity part; 4. Second outer mold sleeve; 401. Threaded through-hole; 402. Clamping part; 403. Second inner cavity part; 5. Feed outer sleeve; 501. Feed tapered hole part; 6. Discharge connecting rod; 601. Inner stepped threaded hole part; 7. Secondary core mold; 701. First stepped part; 8. Double-headed screw; 9. Main core mold; 901. Second stepped part; 10. Screw; 11. Connecting rib. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The following further describes the utility model with reference to the drawings.

[0025] Such as Figures 1-5As shown in the figure, a PVC electrical pipe extrusion die includes an outer discharge part 1. A flange connection ring 2 is sleeved outside the middle of the outer discharge part 1. A first outer die sleeve 3 is provided on one side of the flange connection ring 2 and the outer discharge part 1. A second outer die sleeve 4 is provided on the other side of the first outer die sleeve 3. A feeding outer part 5 is provided on the other side of the second outer die sleeve 4. A discharge connecting rod 6 is inserted into the outer discharge part 1. A double-headed screw 8 is inserted into the inner end of the discharge connecting rod 6. At the same time, a secondary core die 7 is sleeved outside the middle of the double-headed screw 8. The other end of the double-headed screw 8 is inserted into the main core die 9. The secondary core die 7 is placed inside the first outer die sleeve 3. One end of the secondary core die 7 is clamped into the middle of one side of the second outer die sleeve 4. The main core die 9 is placed inside the feeding outer part 5. One end of the main core die 9 is clamped into the middle of the other side of the second outer die sleeve 4.

[0026] The flange connection ring 2 is slidably connected to the outside of the middle of the outer discharge part 1, and the outer wall of the outer discharge part 1 is closely attached to the inner wall of the flange connection ring 2. One side of the flange connection ring 2 is fixedly connected to one side of the first outer die sleeve 3. A screw 10 is fixedly connected at the connection between the side surface of the flange connection ring 2 and the side surface of the first outer die sleeve 3. One end of the outer discharge part 1 is clamped and fixedly connected inside the side surface of the first outer die sleeve 3, and a screw 10 is inserted between the first outer die sleeve 3 and the outer discharge part 1.

[0027] After the flange connection ring 2 is provided outside the outer discharge part 1, the first outer die sleeve 3 is connected by using the flange connection ring 2, so that the first outer die sleeve 3 is connected to the outer discharge part 1, and the positions of the flowing materials inside the two are on the same center line.

[0028] Furthermore, one side of the second outer die sleeve 4 is fixedly connected to the other side of the first outer die sleeve 3, and a screw 10 is provided at the connection between the first outer die sleeve 3 and the second outer die sleeve 4. One side of the feeding outer part 5 is fixedly connected to the other side of the second outer die sleeve 4, and a screw 10 is provided at the connection between the second outer die sleeve 4 and the feeding outer part 5.

[0029] The second outer die sleeve 4 is provided on the other side of the first outer die sleeve 3, and the feeding outer part 5 is provided on the other side of the second outer die sleeve 4. In this way, the outer discharge part 1, the first outer die sleeve 3, the second outer die sleeve 4 and the feeding outer part 5 are connected into one body to perform extrusion work inside the internal cavity.

[0030] A discharge through-hole part 101 is opened inside the outer discharge part 1, and the discharge connecting rod 6 is inserted into the discharge through-hole part 101. At the same time, the outer end of the discharge connecting rod 6 extends beyond the side surface of the outer discharge part 1. There is a gap between the middle of the discharge connecting rod 6 and the inner wall of the discharge through-hole part 101.

[0031] Furthermore, an inner stepped threaded hole part 601 is opened at the inner end of the discharge connecting rod 6, and one end of the double-headed screw 8 is inserted into the inner stepped threaded hole part 601. The middle of the double-headed screw 8 is sleeved and threadedly connected to the middle of the secondary core die 7. At the same time, the other end of the double-headed screw 8 passes through the secondary core die 7.

[0032] At the inner end of the discharge connecting rod 6, there is a double-headed screw rod 8 and a sub-core mold 7. The double-headed screw rod 8 is used to connect the discharge connecting rod 6 and the sub-core mold 7 into one body.

[0033] Further, one end of the sub-core mold 7 is clamped into the step of the inner stepped threaded hole part 601. A first inner cavity part 301 is provided in the first outer mold sleeve 3, and there is a distance between the inner wall of the first inner cavity part 301 and the outer wall of the sub-core mold 7.

[0034] Further, the other end of the sub-core mold 7 is provided with a first step part 701. The middle part of the second outer mold sleeve 4 is fixedly connected with a connecting rib 11. Both the upper and lower surfaces of the middle part of the connecting rib 11 are provided with clamping parts 402. At the same time, the first step part 701 is clamped into the clamping part 402.

[0035] After the first step part 701 on the sub-core mold 7 is clamped onto the clamping part 402 in the second outer mold sleeve 4, the sub-core mold 7 and the second outer mold sleeve 4 are connected into one body, and the material entering the second outer mold sleeve 4 will squeeze through the periphery of the sub-core mold 7.

[0036] Further, a threaded through hole 401 is provided in the middle part of the connecting rib 11, and the other end of the double-headed screw rod 8 is fixedly connected in the threaded through hole 401. One end of the main core mold 9 is provided with a second step part 901, and the second step part 901 is clamped into the clamping part 402.

[0037] Further, a feed conical hole part 501 is provided in the feed outer sleeve 5, and there is a distance between the inner wall of the feed conical hole part 501 and the outer wall of the main core mold 9.

[0038] After the main core mold 9 is clamped into the clamping part 402 on the other side of the second outer mold sleeve 4, the main core mold 9 and the second outer mold sleeve 4 become one body, and the second outer mold sleeve 4 is fixedly connected to the feed outer sleeve 5. In this way, after the main core mold 9 is placed in the feed outer sleeve 5, the material starts to enter the interior from the main core mold 9.

[0039] Further, a plurality of second inner cavity parts 403 are formed between the interior of the second outer mold sleeve 4 and the connecting rib 11, and the plurality of second inner cavity parts 403 equally divide the interior of the second outer mold sleeve 4.

[0040] The provision of the second inner cavity part 403 in the second outer mold sleeve 4 is to equally divide the entering material. Then, when it enters the sub-core mold 7 and the discharge connecting rod 6, it is connected into one body again, and finally it is extruded from the discharge through hole part 101 of the discharge outer sleeve 1.

[0041] Working principle:

[0042] A flange connection ring 2 is sleeved outside the discharge outer sleeve 1. One side of the flange connection ring 2 is connected to the first outer die sleeve 3. On the other side of the first outer die sleeve 3, there is a second outer die sleeve 4. And on the other side of the second outer die sleeve 4, there is a feed outer sleeve 5. In this way, the discharge outer sleeve 1, the first outer die sleeve 3, the second outer die sleeve 4 and the feed outer sleeve 5 are connected into one body. A discharge connecting rod 6 is arranged inside the discharge outer sleeve 1. The inner end of the discharge connecting rod 6 is connected to a double-headed screw rod 8. And a secondary core die 7 is sleeved outside the middle part of the double-headed screw rod 8. In this way, the discharge connecting rod 6 and the secondary core die 7 are integrated. Since a discharge through-hole part 101 and a first inner cavity part 301 are respectively arranged inside the discharge outer sleeve 1 and the first outer die sleeve 3, a partial cavity of the product is formed between the discharge connecting rod 6, the secondary core die 7 and the discharge through-hole part 101, the first inner cavity part 301. The other side of the secondary core die 7 is connected to the middle part of the second outer die sleeve 4. And the double-headed screw rod 8 is connected to the middle part of the second outer die sleeve 4. At the same time, the middle part on the other side of the second outer die sleeve 4 is clamped to the main core die 9. Since the main core die 9 is placed inside the feed outer sleeve 5, a feed cavity is formed between the main core die 9 and the inner feed conical hole part 501 of the feed outer sleeve 5. When feeding from the feed outer sleeve 5, the material will push the main core die 9 against the second outer die sleeve 4. At the same time, the main core die 9 separates the incoming material and enters through the second inner cavity part 403. Then when the material is squeezed to the discharge connecting rod 6, it is squeezed together again and finally extruded from the discharge through-hole part 101.

[0043] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the technical field to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present invention.

[0044] Although terms such as 1, discharge outer sleeve; 101, feed through-hole part; 2, flange connection ring; 3, first outer die sleeve; 301, first inner cavity part; 4, second outer die sleeve; 401, threaded through-hole; 402, clamping part; 403, second inner cavity part; 5, feed outer sleeve; 501, discharge conical hole part; 6, feed connecting rod; 601, inner stepped threaded hole part; 7, secondary core die; 701, first stepped part; 8, double-headed screw rod; 9, main core die; 901, second stepped part; 10, screw; 11, connecting rib are used more frequently in this article, the possibility of using other terms is not excluded. Using these terms is only for more conveniently describing and explaining the essence of the present invention. Interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. A PVC electrical pipe extrusion die, comprising a discharge outer set (1), characterized in that: The middle outer sleeve of the discharge outer sleeve (1) is provided with a flange connection ring (2), and the flange connection ring (2) and one side of the discharge outer sleeve (1) are provided with a first outer mold sleeve (3), the other side of the first outer mold sleeve (3) is provided with a second outer mold sleeve (4), and the other side of the second outer mold sleeve (4) is provided with a feed outer sleeve (5), a discharge connecting rod (6) is inserted into the discharge outer sleeve (1), and a double-headed screw (8) is inserted into the inner end of the discharge connecting rod (6), and at the same time, a secondary core mold (7) is provided on the middle outer sleeve of the double-headed screw (8), and the other end of the double-headed screw (8) is inserted into the main core mold (9), the secondary core mold (7) is placed in the first outer mold sleeve (3), and one end of the secondary core mold (7) is inserted into the middle of one side of the second outer mold sleeve (4), and the main core mold (9) is placed in the feed outer sleeve (5), and one end of the main core mold (9) is inserted into the middle of the other side of the second outer mold sleeve (4).

2. The PVC electrical pipe extrusion die according to claim 1, characterized in that: A slidably connected flange connection ring (2) is disposed outside the middle of the discharge outer sleeve (1), and the outer wall of the discharge outer sleeve (1) is tightly fitted with the inner wall of the flange connection ring (2). The side of the flange connection ring (2) is fixedly connected to one side of the first outer mold sleeve (3), and a screw (10) is fixedly connected at the connection between the side of the flange connection ring (2) and the side of the first outer mold sleeve (3). One end of the discharge outer sleeve (1) is inserted into the side of the first outer mold sleeve (3) and fixedly connected, and a screw (10) is inserted between the first outer mold sleeve (3) and the discharge outer sleeve (1).

3. The PVC electrical pipe extrusion die according to claim 2, characterized in that: The other side of the first outer mold sleeve (3) is fixedly connected to one side of the second outer mold sleeve (4), and a screw (10) is provided at the connection between the first outer mold sleeve (3) and the second outer mold sleeve (4); the other side of the second outer mold sleeve (4) is fixedly connected to one side of the feed outer mold sleeve (5), and a screw (10) is provided at the connection between the second outer mold sleeve (4) and the feed outer mold sleeve (5).

4. The PVC electrical pipe extrusion die according to claim 3, characterized in that: A discharge through hole portion (101) is provided in the discharge outer sleeve (1), and a discharge connecting rod (6) is inserted into the discharge through hole portion (101), while the outer end of the discharge connecting rod (6) protrudes beyond the side surface of the discharge outer sleeve (1), and a gap is provided between the middle portion of the discharge connecting rod (6) and the inner wall of the discharge through hole portion (101).

5. The PVC electrical pipe extrusion die according to claim 4, characterized in that: The inner end of the discharge connecting rod (6) is provided with an inner step threaded hole (601), and one end of a double-headed screw (8) is inserted into the inner step threaded hole (601), and a thread is arranged outside the middle part of the double-headed screw (8) to connect to the middle part of the auxiliary core mold (7), while the other end of the double-headed screw (8) passes through the auxiliary core mold (7).

6. The PVC electrical pipe extrusion die according to claim 5, characterized in that: One end of the auxiliary core mold (7) is inserted into the step of the inner step threaded hole (601), and a first inner cavity (301) is provided in the first outer mold sleeve (3), and a distance is provided between the inner wall of the first inner cavity (301) and the outer wall of the auxiliary core mold (7).

7. The PVC electrical pipe extrusion die according to claim 6, characterized in that: The other end of the secondary core mold (7) is provided with a first step portion (701), the middle of the second outer mold sleeve (4) is fixedly connected to the connecting rib (11), and the middle of the connecting rib (11) is provided with a clamping portion (402) on the upper and lower sides, and the clamping portion (402) is clamped into the first step portion (701).

8. The PVC electrical pipe extrusion die according to claim 7, characterized in that: A threaded through hole (401) is provided in the middle of the connecting rib (11), and the other end of the double-headed screw (8) is fixedly connected in the threaded through hole (401). A second step portion (901) is provided at one end of the main core mold (9), and the second step portion (901) is clamped in the clamping part (402).

9. The PVC electrical pipe extrusion die according to claim 8, characterized in that: A feed cone hole portion (501) is provided in the feed outer sleeve (5), and a distance exists between the inner wall of the feed cone hole portion (501) and the outer wall of the main core mold (9).

10. The PVC electrical pipe extrusion die according to claim 9, characterized in that: A plurality of second inner cavities (403) are formed between the interior of the second outer mold sleeve (4) and the connecting ribs (11), and the plurality of second inner cavities (403) equally divide the interior of the second outer mold sleeve (4).

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