Fluoroplastic lining pump shell mold formed through compression molding

Abstract

The utility model belongs to the technical field of pump processing, and discloses a compression-molded fluoroplastic-lined pump shell mold, which aims to solve the problems existing in a pump shell of a fluoroplastic-lined pump in the prior art, and comprises a charging barrel arranged on the inlet side of a pump shell casting, a pressing mold is arranged in the charging barrel, and a core block seat is arranged in the pump shell casting. A volute-shaped core block body is installed on the outer side of the lower portion of the core block base, a bottom die is detachably installed at the bottom of the core block base, an outlet core die is installed on the inner side of an outlet of the pump shell casting, an outlet core die pressing plate is installed on the outlet core die, and a space used for pressing a pump shell lining plastic layer is formed among the pump shell casting, the core block base, the core block body and the outlet core die. The outlet core mold is convenient to manufacture and simple in structure, the core block is tightly attached to the outlet core mold, the outlet core mold and a pump shell casting outlet cannot relatively move, the accuracy of a pump shell outlet mold line is guaranteed, the hydraulic performance of a pump shell is guaranteed, the volute shape of the pump shell and the outlet mold line are in smooth transition, and the flow, lift and efficiency of a pump are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of pump processing technology, specifically to a molded fluoroplastic-lined pump housing mold. Background Technology

[0002] The pump casing of a fluoroplastic-lined chemical centrifugal pump is volute-shaped, with a gradually increasing cross-sectional area of ​​the flow channel, converting the kinetic energy of the medium into pressure energy to achieve medium transportation. However, due to the relatively complex shape of the pump casing cavity and the fact that the fluoroplastic layer for fluoroplastic-lined chemical centrifugal pumps is only 3-4 mm thick, demolding existing lining pump casing molds is difficult.

[0003] The prior art disclosed in patent CN201420431996.7 is a plastic-lined magnetic pump casing mold, but the poor transition between the pump casing outlet and the volute casing will affect the pump's flow rate, head and efficiency, and will also cause leakage due to poor connection of the pump outlet. Current technology cannot solve this problem well. Utility Model Content

[0004] The purpose of this invention is to solve the problems existing in the pump casing of fluoroplastic-lined pumps in the prior art, and to provide a molded fluoroplastic-lined pump casing mold with simple structure, easy disassembly, smooth transition of pump casing outlet, and guaranteed pump flow, head and efficiency.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A compression molding mold for a fluoroplastic-lined pump casing includes a barrel disposed on the inlet side of a pump casing casting, a compression mold inside the barrel, a core block seat inside the pump casing casting, a volute-shaped core block body disposed on the lower outer side of the core block seat, and the core block body being assembled from multiple core blocks, a bottom mold being detachably mounted on the bottom of the core block seat, an outlet core mold being disposed on the inner side of the outlet of the pump casing casting, and a positioning platform being provided at the bottom end of the outlet core mold, the positioning platform engaging with a positioning hole disposed on the core block body, an outlet core mold pressure plate being mounted on the outlet core mold, the outlet core mold pressure plate being detachably connected to the outlet flange of the pump casing casting, and a space for pressing the pump casing lining plastic layer being formed between the pump casing casting, the core block seat, the core block body, and the outlet core mold.

[0007] Furthermore, an anti-rotation pin is installed between the export core mold and the core mold pressure plate.

[0008] Furthermore, the core body is assembled from six core blocks, and at least one core block has a small outer edge and a large inner edge.

[0009] Furthermore, the bottom mold is provided with multiple core block adjustment holes along the circumferential direction, and the core block adjustment holes are connected to the core block seat by bolts.

[0010] Furthermore, each of the core blocks is provided with a threaded hole, and the core block and the core block seat are connected by an internal angle bolt.

[0011] Furthermore, the bottom mold is connected to the pump casing casting by bolts.

[0012] Furthermore, the positioning holes are located on the core block near the exit core mold.

[0013] Compared with the prior art, this utility model has the following advantages:

[0014] This invention is easy to manufacture and has a simple structure. The core block and outlet mandrel fit together tightly, preventing relative displacement between the outlet mandrel and the pump casing casting outlet. This ensures the accuracy of the pump casing outlet profile, guarantees the pump casing's hydraulic performance, and allows for a smooth transition between the volute shape and the outlet profile, thus ensuring the pump's flow rate, head, and efficiency. One of the core blocks has a small outer edge and a large inner edge, facilitating its removal from the pump cavity. Once space is available, the remaining core blocks can be removed, achieving the removal of the volute-shaped core block from the pump casing cavity.

[0015] This invention provides a cross-seam anti-rotation pin at the joint surface of the outlet core mold and the outlet core mold pressure plate to prevent the outlet core mold from being misaligned with the pump casing outlet due to relative displacement.

[0016] The bottom mold of this utility model is provided with a core block adjustment hole, which allows the core block seat to move in the circumferential direction. Since the core block seat is fixed to the core block, it drives the core block to move, so that the core block fits tightly with the outlet core mold, achieving a smooth transition during pump casing outlet compression molding and improving the hydraulic performance of the pump casing.

[0017] In this invention, the core block and the outlet core mold cooperate with each other through positioning holes and positioning platforms to prevent relative displacement between the core block and the outlet core mold, thereby ensuring a smooth transition between the pump casing outlet and the core mold. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a top view of the bottom membrane of this utility model.

[0020] Figure 3 This is a side view of the bottom film of this utility model.

[0021] Figure 4 This is a schematic diagram of the structure of the core block of this utility model.

[0022] Figure 5 This is a schematic diagram showing the connection between the export core mold and the export core mold pressure plate of this utility model.

[0023] Figure 6 This is a schematic diagram of the fluoroplastic-lined pump housing of this utility model.

[0024] Figure 7 This utility model Figure 6 Side sectional view.

[0025] The meanings of the reference numerals in the attached drawings are as follows: 1. Bottom mold; 2. Core block; 3. Barrel; 4. Core block seat; 5. Press mold; 6. Pump casing casting; 7. Outlet core mold; 8. Core mold pressure plate; 9. Core block adjustment hole; 10. Positioning hole; 11. Core block; 12. Positioning platform; 13. Anti-rotation pin across the seam; 14. Pump casing plastic lining layer; 15. Threaded hole; 16. Internal angle bolt. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0027] like Figure 1-7 As shown, a compression-molded fluoroplastic-lined pump housing mold includes a barrel 3 disposed on the inlet side of a pump housing casting 6, a compression mold 5 inside the barrel 3, a core block seat 4 inside the pump housing casting 6, a volute-shaped core block 2 mounted on the lower outer side of the core block seat 4, and the core block 2 being assembled from six core blocks 11, with at least one core block 11 having a smaller outer edge and a larger inner edge. Each core block 11 is provided with a threaded hole 15, and the core block 11 is connected to the core block seat 4 by internal angle bolts 16. A bottom mold 1 is mounted on the bottom of the core block seat 4, and the bottom mold 1 is provided with multiple core block adjustment holes 9 along the circumferential direction. The core block adjustment holes 9 are bolted to the core block seat 4, and the bottom mold 1 is bolted to the pump housing casting 6.

[0028] An outlet core mold 7 is installed inside the outlet of the pump casing casting 6, and a positioning platform 12 is provided at the bottom of the outlet core mold 7. The positioning platform 12 is matched with the positioning hole 10 provided on the core block 2 (the positioning hole 10 is provided on the core block 11 near the outlet core mold 7). An outlet core mold pressure plate 8 is installed on the outlet core mold 7. The outlet core mold pressure plate 8 is connected to the outlet flange of the pump casing casting 6 by bolts. A cross-seam anti-rotation pin 13 is installed between the outlet core mold 7 and the core mold pressure plate 8.

[0029] The pump casing casting 6 forms a space between the core block seat 4, the core block body 2, and the outlet core mold 7 for pressing the pump casing liner plastic layer 14.

[0030] When pressing, follow these steps:

[0031] Wipe the inner surface of the mold with a release agent.

[0032] Then, the barrel 3 is fixed to the inlet flange of the pump housing casting 6 with bolts, the core blocks 11 are placed into the inner cavity of the pump housing casting 6 in sequence, and then the core block seat 4 is placed in. Each core block 11 is fixed to the core block seat 4 with internal angle bolts 16.

[0033] Then, the bottom mold 1 is installed and fixed to the pump housing casting 6 with bolts. Then, the core block seat 4 is fixed to the bottom mold 1 with bolts.

[0034] Next, install the outlet core mold 7. When installing, align the positioning hole 10 of the outlet core mold 7 with the positioning platform 12 of the core block 11. Ensure that the two fit together accurately. Then, install the outlet core mold pressure plate 8 and align it with the anti-rotation pin 13. Finally, use bolts to fix the outlet core mold pressure plate 8 to the outlet flange of the pump casing casting 6.

[0035] Then, use the core block adjustment hole 9 to rotate the core block seat 4, and then rotate the entire assembled core block 11 until it can no longer be rotated. Then, lock the bolt in the core block adjustment hole 9.

[0036] Add the preheated fluoroplastic to the barrel 3, then place it into the mold 5, press it to 4MPa using a press, hold the pressure for 3 hours, and then cool it to room temperature with water.

[0037] Then remove the bottom mold 1 and the core block seat 4. Next, remove the core block 11 with a small outer edge and a large inner edge. Then remove the remaining core blocks 11 in sequence. After that, remove the material cylinder 3, the pressure mold 5, the exit core mold 7 and the exit core mold pressure plate 8.

[0038] The inner layer of the finally pressed pump casing is a plastic liner 14. The smooth transition between the volute shape and the outlet profile of the pump casing ensures the pump flow rate, head, and efficiency.

Claims

1. A molding die for a fluoroplastic-lined pump housing, comprising a barrel (3) disposed on the inlet side of a pump housing casting (6), wherein a compression mold (5) is installed inside the barrel (3), characterized in that: The pump casing casting (6) contains a core block seat (4), and a volute-shaped core block body (2) is installed on the lower outer side of the core block seat (4). The core block body (2) is assembled from multiple core blocks (11). A bottom mold (1) is detachably installed at the bottom of the core block seat (4). An outlet core mold (7) is installed on the inner side of the outlet of the pump casing casting (6). A positioning platform (12) is provided at the bottom of the outlet core mold (7). The positioning platform (12) cooperates with the positioning hole (10) provided on the core block body (2). An outlet core mold pressure plate (8) is installed on the outlet core mold (7). The outlet core mold pressure plate (8) is detachably connected to the outlet flange of the pump casing casting (6). A space for pressing the pump casing lining plastic layer (14) is formed between the pump casing casting (6), the core block seat (4), the core block body (2), and the outlet core mold (7).

2. A die for compression molding fluoroplastic lined pump housings according to claim 1 wherein: A cross-seam anti-rotation pin (13) is installed between the export core mold (7) and the core mold pressure plate (8).

3. A die for compression molding fluoroplastic lined pump housings according to claim 2 wherein: The core block (2) is assembled from six core blocks (11), and at least one core block (11) has a small outer edge and a large inner edge.

4. A mould for the compression moulding of a fluoroplastic lined pump housing according to claim 1 or claim 3, characterised in that: The bottom mold (1) is provided with multiple core block adjustment holes (9) along the circumferential direction, and the core block adjustment holes (9) are connected to the core block seat (4) by bolts.

5. A die for compression molding fluoroplastic lined pump housings according to claim 4 wherein: Each of the core blocks (11) is provided with a threaded hole (15), and the core block (11) is connected to the core block seat (4) by an internal angle bolt (16).

6. A die for compression molding fluoroplastic lined pump housings according to claim 1 wherein: The bottom mold (1) is connected to the pump casing casting (6) by bolts.

7. A die for compression molding fluoroplastic lined pump housings according to claim 1 wherein: The positioning hole (10) is located on the core block (11) near the exit core mold (7).

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