Injection molding device for rapidly producing pressure-resistant swimming pool pump shell and forming method

Abstract

The injection molding device comprises a movable mold, a fixed mold and a power mechanism, a mold cavity is formed between the movable mold and the fixed mold, the injection molding device is characterized in that the power mechanism comprises a hydraulic motor and four sets of hydraulic oil cylinders, and the four sets of hydraulic oil cylinders are located on the top and the side wall of the movable mold respectively; a temperature control circulating water path is arranged around the mold cavity, and a sprue in the fixed mold corresponds to an impeller water inlet in the pump shell. Through theoretical design, a scientific cooling water channel, an optimal injection molding sprue and an efficient and smooth mechanical transmission mechanism are designed, Mold flow mold flow analysis is combined, theoretical design parameters are optimized, an efficient and reliable swimming pool pump shell injection mold is precisely manufactured, meanwhile, a targeted injection molding production process method is explored, and the production efficiency is improved. And safe, rapid and high-quality mass production of the pressure-resistant pump shell is achieved.

Description

Technical Field

[0001] The invention relates to an injection molding device, in particular to an injection molding device and a molding method for rapidly producing a pressure-resistant swimming pool pump casing. Background Art

[0002] Currently, existing injection molds for swimming pool pump casings on the market suffer from simple structures, inconsistent demolding, unscientific cooling water path design, suboptimal gate placement, incomplete mold clamping and sealing, and frequent flash, weld marks, and air entrapment. These factors directly impact the quality of injection-molded pump casings. Furthermore, inserts are often used for internal thread structures, requiring manual removal during demolding. This negatively impacts production efficiency, insufficient product compressive strength, and poses safety risks to operators. Summary of the Invention

[0003] In order to solve the above-mentioned defects in the prior art, the present invention proposes an injection molding device for quickly producing a pressure-resistant swimming pool pump casing.

[0004] The technical solution of the present invention is achieved as follows: an injection molding device for rapidly producing a pressure-resistant swimming pool pump casing includes a movable mold, a fixed mold, and a power mechanism. A mold cavity is provided between the movable and fixed molds. The power mechanism includes a hydraulic motor and four sets of hydraulic cylinders, which are respectively located on the top and side walls of the movable mold. A temperature-controlled circulating water circuit is provided around the mold cavity, and the gate on the fixed mold corresponds to the water inlet of the impeller on the pump casing.

[0005] In one embodiment, the hydraulic motor is disposed at the top of the fixed mold.

[0006] The power mechanism consists of four sets of hydraulic cylinders and one set of hydraulic motors, combined with internal gear racks and other mechanical transmission mechanisms, to form a coherent and efficient combination of multiple actions during demoulding. The important features of the pump casing (four internal threads, two large deep cavities, and a neutral-plane symmetrical shell) are achieved through the screw, side core pulling, slider and other structures to achieve silky smooth demoulding, with short time and efficient and coherent movements.

[0007] The injection molding device selects the best gate position based on the product's own structure and combines mold flow analysis with the best gate structure.

[0008] By combining theoretical calculations, mold flow analysis and other means, a temperature-controlled circulating water circuit was set up in the injection molding device to achieve uniform temperature distribution in the mold cavity, effectively ensuring the quality of the pump casing injection molding production.

[0009] Furthermore, the present invention provides a method for molding a swimming pool pump casing using the above-mentioned injection molding device.

[0010] The technical solution of the molding method is implemented as follows: A method for molding a swimming pool pump casing using an injection molding device comprises the following steps:

[0011] S1. Before injection molding, special stainless steel structural lining parts are produced through stamping, turning and laser welding technology;

[0012] S2. Before injection molding, the specially designed structural lining is placed in a preheating device and preheated to approximately 135°C to eliminate the risk of stress cracking caused by the huge difference in thermal expansion coefficients between the metal and the plastic during injection molding.

[0013] During injection molding, the injection molding device operation sequence is set, and the specially designed structural lining is removed and placed into the mold cavity by the robotic automation device;

[0014] S4. Positioning the specially structured lining in the injection molding device;

[0015] S5. Carry out periodic mass production according to the set action sequence.

[0016] In one embodiment, the specially-made structural lining member includes a connecting portion and a bending portion, and the bending portions are respectively provided at both ends of the connecting portion.

[0017] In one embodiment, the connecting portion and the bending portion are smoothly transitioned through an arc.

[0018] In one embodiment, the connecting portion is provided with a positioning hole, and the bending portion is provided with a positioning ring.

[0019] In one embodiment, the positioning holes are spaced apart and distributed in the middle of the connecting portion.

[0020] In one embodiment, the positioning ring and the bent portion are connected via a fixing plate.

[0021] In one embodiment, a reinforcing rib is provided on the connecting portion, and the reinforcing rib is located on the side of the bending portion that is bent toward the connecting portion.

[0022] In one embodiment, the reinforcing ribs are located between the positioning holes.

[0023] Through theoretical design, the present invention designs a scientific cooling water channel, an optimal injection molding gate, an efficient and smooth mechanical transmission mechanism, and combines mold flow analysis to optimize theoretical design parameters, accurately manufacturing an efficient and reliable swimming pool pump casing injection mold. At the same time, a targeted injection molding production process method is explored to achieve safe, fast, and high-quality mass production of pressure-resistant pump casings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1This is a first axis view of the injection molding device of the present invention;

[0025] Figure 2 This is a second axis view of the injection molding device of the present invention;

[0026] Figure 3 Schematic diagram of the movable mold structure of the present invention;

[0027] Figure 4 Figure 3 A schematic diagram of the structure at center A;

[0028] Figure 5 This is a schematic diagram of the fixed mold structure of the present invention;

[0029] Figure 6 for Figure 5 Schematic diagram of the structure at B in the middle;

[0030] Figure 7 This is a schematic diagram of the structure of the specially made lining member of the present invention;

[0031] Figure 8 This is a schematic diagram of the pump casing structure of the present invention.

[0032] In the figure, 1. movable mold, 2. fixed mold, 3. hydraulic motor, 4. hydraulic cylinder, 5. temperature-controlled circulating water channel, 6. gate, 7. pump casing, 8. impeller water inlet, 9. special structure lining, 10. connection part, 11. bending part, 12. positioning hole, 13. positioning ring, 14. fixing plate, 15. reinforcing rib, 16. mold cavity. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] It should be noted that when a component is referred to as being "mounted on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component. When a component is considered to be "fixed to" another component, it may be directly fixed to the other component or there may be a central component.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0036] like Figures 1 to 6 、 Figure 8 As shown, this embodiment discloses an injection molding device for rapidly producing a pressure-resistant swimming pool pump casing, comprising a movable mold 1, a fixed mold 2, and a power mechanism. A mold cavity 16 is provided between the movable mold 1 and the fixed mold 2. The power mechanism comprises a hydraulic motor 3 and four sets of hydraulic cylinders 4, which are respectively located on the top and side walls of the movable mold 1. A temperature-controlled circulating water channel 5 is provided around the mold cavity 16. The gate 6 on the fixed mold 2 corresponds to the impeller water inlet 8 on the pump casing 7.

[0037] In this embodiment, the hydraulic motor 3 is disposed at the top end of the fixed mold 2 .

[0038] The power mechanism consists of four groups of hydraulic cylinders 4 and one group of hydraulic motors 3, combined with internal gear racks and other mechanical transmission mechanisms, to form a coherent and efficient combination of multiple actions during demoulding. The important features of the pump housing 7 (four internal threads, two large deep cavities, and a neutral-plane symmetrical shell) are achieved through the screw, side core pulling, slider and other structures to achieve silky smooth demoulding, with short time and efficient and coherent actions.

[0039] The injection molding device selects the best gate position based on the product's own structure and combines mold flow analysis with the best gate structure.

[0040] By combining theoretical calculations, mold flow analysis and other means, a temperature-controlled circulating water circuit was set up in the injection molding device to achieve uniform temperature distribution in the mold cavity, effectively ensuring the quality of the pump casing injection molding production.

[0041] Furthermore, the present invention provides a method for molding a swimming pool pump casing using the above-mentioned injection molding device.

[0042] The technical solution of the molding method is implemented as follows: A method for molding a swimming pool pump casing using an injection molding device comprises the following steps:

[0043] S1. Before injection molding, a special stainless steel structure lining 9 is generated by stamping, turning, and laser welding technology;

[0044] S2. Before injection molding, place the specially designed structural lining 9 in a preheating device and preheat it to approximately 135°C to eliminate the risk of stress cracking caused by the large difference in thermal expansion coefficients between the metal and the plastic during injection molding.

[0045] S3 injection molding, set the injection molding device operation sequence, the robot automation device will be specially structured liner 9 removed into the mold cavity 16;

[0046] S4. Positioning the specially structured liner 9 within the injection molding device;

[0047] S5. Carry out periodic mass production according to the set action sequence.

[0048] like Figure 7 As shown, in this embodiment, the specially structured lining member 9 includes a connecting portion 10 and a bending portion 11 , and the bending portions 11 are respectively provided at both ends of the connecting portion 10 .

[0049] In this embodiment, the connecting portion 10 and the bending portion 11 are smoothly transitioned through an arc.

[0050] Preferably, the specially structured lining member 9 is made of stainless steel.

[0051] In this embodiment, the connecting portion 10 is provided with a positioning hole 12 , and the bending portion 11 is provided with a positioning ring 13 .

[0052] In this embodiment, the positioning holes 12 are distributed at intervals in the middle of the connecting portion 10 .

[0053] In this embodiment, the positioning ring 13 and the bent portion 11 are connected via a fixing plate 14 .

[0054] In this embodiment, a reinforcing rib 15 is provided on the connecting portion 10 , and the reinforcing rib 15 is located on the side of the bending portion 11 that is bent toward the connecting portion 10 .

[0055] In this embodiment, the reinforcing ribs 15 are located between the positioning holes 12 .

[0056] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An injection molding device for rapidly producing a pressure-resistant swimming pool pump casing, comprising a movable mold, a fixed mold, and a power mechanism, wherein a mold cavity is provided between the movable mold and the fixed mold, and characterized in that: The power mechanism includes a hydraulic motor and four groups of hydraulic cylinders, which are respectively located on the top and side walls of the movable mold. A temperature-controlled circulating water channel is provided around the mold cavity, and the gate on the fixed mold corresponds to the impeller water inlet on the pump casing.

2. The injection molding device for rapidly producing a pressure-resistant swimming pool pump casing according to claim 1, characterized in that: The hydraulic motor is arranged at the top end of the fixed die.

3. A method for molding a swimming pool pump housing using the injection molding device according to claim 1, characterized in that: The following steps are involved: S1. Before injection molding, special stainless steel structural lining parts are produced through stamping, turning and laser welding technology; S2. Before injection molding, the specially designed structural lining is placed in a preheating device and preheated to approximately 135°C to eliminate the risk of stress cracking caused by the huge difference in thermal expansion coefficients between the metal and the plastic during injection molding. During injection molding, the injection molding device operation sequence is set, and the specially designed structural lining is removed and placed into the mold cavity by the robotic automation device; S4. Positioning the specially structured lining in the injection molding device; S5. Carry out periodic mass production according to the set action sequence.

4. The method for molding a swimming pool pump housing using an injection molding device according to claim 3, characterized in that: The specially structured lining component includes a connecting portion and a bending portion, and the bending portions are respectively arranged at both ends of the connecting portion.

5. The method for molding a swimming pool pump housing using an injection molding device according to claim 4, characterized in that: The connecting portion and the bending portion are smoothly transitioned through an arc.

6. The method for molding a swimming pool pump housing using an injection molding device according to claim 4, characterized in that: The connecting portion is provided with a positioning hole, and the bending portion is provided with a positioning ring.

7. The method for molding a swimming pool pump housing using an injection molding device according to claim 6, characterized in that: The positioning holes are distributed at intervals in the middle of the connecting portion.

8. The method for molding a swimming pool pump housing using an injection molding device according to claim 6, wherein: The positioning ring and the bent portion are connected via a fixing plate.

9. The method for molding a swimming pool pump housing using an injection molding device according to claim 6, characterized in that: The connecting portion is provided with a reinforcing rib, and the reinforcing rib is located on the side of the bending portion that is bent toward the connecting portion.

10. The method for molding a swimming pool pump housing using an injection molding device according to claim 9, characterized in that: The reinforcing ribs are located between the positioning holes.

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