Reusable extractor assembly for production of spun pipes

Abstract

The present invention relates to a reusable extractor (100) for producing spun pipes. The extractor (100) comprises a core holder (104). The core holder (104) includes a plurality of links (102). The extractor (100) further includes a first collapsible part (106) coupled to the core holder (104). The first collapsible part (106) is divided into a plurality of first parts. The reusable extractor (100) coupled to the core holder (102). The second collapsible part (108) is divided into a plurality of second parts. A size of each part of the plurality of first parts of the first collapsible part (106) is larger than a size of each part of the plurality of second parts of the second collapsible part (108). Each of the first collapsible part (106) and the second collapsible part (108) is of a metal.

Description

[0001] REUSABLE EXTRACTOR ASSEMBLY FOR PRODUCTION OF SPUN PIPES

[0002] FIELD OF THE INVENTION

[0003]

[0001] The present invention relates to the field of casting molds. More particularly, the present invention relates to a reusable extractor assembly that is used in the production of spun pipes and its method of preparation thereof.

[0004] BACKGROUND

[0005]

[0002] Ductile iron spun pipes, which are commonly used for transporting sewage, drinking water, and gas, are typically manufactured through a process known as centrifugal casting. In this process, molten metal is poured into a mold that is pre-fitted with a core at one end. The mold is then subjected to spinning and rapid cooling, which solidifies the metal and shapes the pipe. The core plays a crucial role in shaping the interior of the pipe and ensuring that the pipe has the proper thickness and structural integrity.

[0006]

[0003] Currently, sand cores are used in the manufacturing of ductile iron spun pipes. After the pipes are cast, these sand cores are removed as waste. This means that for each individual ductile spun pipe produced, a new sand core must be used. The process of making the sand cores is labor-intensive, requiring significant manpower and contributing to increased production costs. Additionally, the discarded sand cores generate a substantial amount of waste and fumes, making the process environmentally unfriendly.

[0007]

[0004] The production of sand cores also has its own set of challenges. The sand used for the cores must be mined, which requires environmental clearances and compliance with pollution regulations, leading to delays in production. Moreover, sand cores are vulnerable to the effects of the monsoon season, and large storage spaces are needed to store them, often for several months.

[0008]

[0005] In light of these issues, there is a need for an alternative core extraction system that can be used repeatedly over multiple cycles of spun pipe production. Such a system would help reduce the reliance on single-use sand cores, cut down on waste and manpower costs, and minimize the environmental impact associated with sand core production and disposal. The development of a more sustainable, reusable core system would address these challenges and contribute to a more cost-effective and eco-friendly manufacturing process.

[0009] OBJECT OF THE INVENTION:

[0010]

[0006] One of the primary objectives of the proposed metal extractor assembly is to reduce the rejection rate of ductile iron spun pipes. By replacing the sand cores with a reusable metal extractor system, the likelihood of defects in the final pipe product can be minimized. The improved precision and consistency provided by the metal extractor assembly result in fewer rejected pipes, which leads to higher production efficiency and reduced costs.

[0011]

[0007] The current sand core method generates a significant amount of waste material, especially with the disposal of the used cores. The invention of a reusable metal extractor assembly will substantially cut down on waste generation. Since the extractor assembly is reusable, the need to create new sand cores for each pipe is eliminated, leading to a more sustainable production process. This also means less environmental impact due to reduced waste disposal and fewer emissions from the disposal of sand cores.

[0012]

[0008] The traditional process of manufacturing ductile iron spun pipes requires significant manpower, particularly in the preparation, removal, and disposal of sand cores. By introducing an automated and reusable metal extractor system, the overall consumption of manual labor can be significantly reduced. This not only lowers labor costs but also enhances productivity and reduces the risk of human error during the production process.

[0013]

[0009] The invention proposes the use of an advanced multitasking machine capable of performing the entire process of preparing the metal extractor assembly. This machine would be designed to streamline the manufacturing process by automating tasks such as molding, pouring, and heat treatment, as well as machining and final mounting of the extractor assembly. This eliminates the need for multiple manual steps, saving time and increasing the overall efficiency of the production process.

[0014]

[0010] The invention emphasizes the use of advanced materials for the production of the metal extractor assembly. The combination of materials such as copper, aluminum, bronze, cast iron, ferritic SG iron, Si-Mo grade SG iron, Ni-resist D5S, SS309 / 310 grade stainless steel, and mild steel offers enhanced durability and strength for the extractor components. These materials are selected for their ability to withstand the high temperatures and stresses associated with the centrifugal casting process. The result is a long-lasting, more reliable extractor assembly that can be reused over many production cycles without significant wear.

[0011] The invention also addresses the need for flexibility in the manufacturing process. It discloses the use of a range of metal extractor assemblies that can be customized to suit different pipe diameters, ranging from small pipes (DN 80 to DN 350) to larger pipes (up to DN 3500 or even DN 5500 and above). This ensures that the new metal extractor assembly can be used for a wide variety of pipe sizes, making it a versatile solution for manufacturers of ductile iron spun pipes.

[0015]

[0012] The method for producing the metal extractor assembly involves several stages, including the preparation of a 3D design of the assembly, the incorporation of metallic patterns in the design, and subsequent processes such as molding, pouring, heat treatment, machining, and final mounting. By utilizing advanced technologies such as 3D design and precision machining, the entire production process becomes more efficient, reducing errors and increasing the overall quality of the metal extractor assembly. The use of heat treatment and machining also ensures that the extractor assembly has the necessary mechanical properties to withstand the demanding conditions of centrifugal casting.

[0016] SUMMARY OF THE INVENTION

[0017]

[0013] The present invention provides a reusable extractor for producing spun pipes. The reusable extractor comprises a core holder. The core holder includes a plurality of links. The extractor further includes a first collapsible part coupled to the core holder. The first collapsible part is divided into a plurality of first parts.

[0018]

[0014] The extractor further includes a second collapsible part coupled to the core holder. The second collapsible part is divided into a plurality of second parts. A size of the first collapsible part is larger than a size of the second collapsible part.

[0019] BRIEF DESCRIPTION OF THE DRAWINGS

[0020]

[0015] The present invention will hereinafter be described in conjunction with the accompanying drawings, wherein like numerals denote like elements. Additional embodiments of the invention will become evident upon reviewing the non-limiting embodiments described in the specification in conjunction with the accompanying drawings, wherein:

[0021]

[0016] Figure 1 A illustrates a perspective view of a reusable extractor, in accordance with an embodiment of the present invention.

[0022]

[0017] Figure 1 B illustrates a front view of a reusable extractor, in accordance with an embodiment of the present invention.

[0023]

[0018] Figure 2 illustrates an exploded view of a reusable extractor, in accordance with an embodiment of the present invention.

[0024]

[0019] Figure 3A and 3B illustrate a side view of a reusable extractor, in accordance with an embodiment of the present invention.

[0025] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026]

[0020] Before the present configuration of an extractor, it is to be understood that this disclosure is not limited to particular assembly or configuration or arrangement for achieving as described, since it may vary within the specification indicated. It is further to be understood that the terminology used in the description is only for the purpose of describing the particular versions or embodiments and is not intended to limit the scope of the present invention.

[0021] The words, “comprising”, “having”, “including” & “containing” and other forms thereof, are intended to be equivalent in meaning and be open ended in that an item or items following any one of these words is not meant to be an exhaustive listing of such item or items or meant to be limited to only the listed item or items.

[0027]

[0022] Conventionally, the method of producing ductile iron spun pipes, which involves the use of sand cores, is costly, labor-intensive, and environmental harmful. The sand cores are not only wasteful but also contribute to pollution through dust and fumes during their removal and disposal. Additionally, the use of sand cores leads to a high rejection rate of spun pipe samples, which further worsens production costs and inefficiencies.

[0028]

[0023] The production of ductile iron spun pipes is carried out using centrifugal casting, typically in metal molds or resin-lined molds. The present invention focuses on the use of metallic molds in this process.

[0029]

[0024] The quality of ductile iron spun pipes — specifically the outer diameter (OD) and wall thickness — depends heavily on the molds used. The accuracy of the pipe’s fitment and socket ends, on the other hand, is controlled by sand cores, which are single-use components. These sand cores are produced using metallic core boxes or a core shooter device. Both the cost and the quality of the manufactured pipe are directly influenced by the molds and cores.

[0030]

[0025] The metallic molds used in the manufacturing process are typically made of carbon steel and are crucial to the production of ductile iron spun pipes. These molds, along with the sand cores, are used in the production of spun pipes ranging from DN 100 to DN 2000 in diameter. After a certain amount of usage, the core boxes must be replaced with new ones. Consequently, manufacturers must maintain a stock of multiple core boxes or dies for the core shooter. It is clear that the cost, quality, reliability, and large-scale production of ductile iron spun pipes are directly dependent on these molds and cores.

[0031]

[0026] The overall costs involved in the production of ductile iron spun pipes can be categorized into the following key cost centers as follows: blast furnace and auxiliary equipment, transfer Ladles for Liquid Metal to Induction Furnace (IF), Induction Furnace and Auxiliary Equipment, Transfer Ladles to Converter, Magnesium Converter and Auxiliary Equipment, Transfer Ladles to Continuous Casting Machine (CCM), Continuous Casting Machine and Auxiliary Equipment, Metallic Molds, Annealing Furnace and Auxiliary Equipment, External Pipe Zinc Coating and Auxiliary Equipment, Hydrostatic Pressure Testing Machine and Auxiliary Equipment, Internal Cement Lining and Auxiliary Equipment, Cement Curing and Curing Pit, Reheating Furnace and Auxiliary Equipment, External Pipe Bitumen Coating and Auxiliary Equipment, Logistics Inspection, Quality Assurance (QA), and Third- Party Inspection (TPI), Storage Yard and Stocking Areas. Each of these cost centers contributes to the overall expense of manufacturing ductile iron spun pipes. However, the role of metallic molds and cores remains critical to ensuring the cost-effectiveness, quality, and sustainability of the production process.

[0032]

[0027] The production of ductile iron spun pipes follows a well-defined process that begins with the extraction of hot metal from the blast furnace (MBF). This metal undergoes desulfurization before being transferred to the induction furnace, where temperature control, dilution or addition of carburizer, ferro alloys, and scrap materials are carried out, along with chemical analysis to ensure the proper composition. Next, the metal undergoes magnesium treatment to adjust its chemical properties. After this, the molten metal is poured into molds for centrifugal casting, where key activities like sand mixing, core making, mold maintenance, and visual inspection of the pipe’s thickness take place. This step ensures the correct dimensions and quality of the cast pipe. Once cast, the pipes proceed to annealing, where further chemical analysis, microstructure examination, and mechanical property tests are conducted to verify pipe quality and dimensions.

[0033]

[0028] Following annealing, the pipes are coated with zinc to achieve the desired coating thickness. The barrel and socket are then ground to correct their dimensions and ovality. The pipes undergo pressure testing to ensure their structural integrity, followed by cement lining, where cement and sand are mixed and applied to the inner surface. After curing, the cement thickness is checked for consistency. The pipes are then heated, followed by the application of bitumen coating, ensuring the appropriate thickness for external protection. Finally, the pipes are marked and stenciled for identification before being stored, packed, and subjected to final inspection, including third-party inspection (TRI), before being dispatched for delivery. This comprehensive process ensures the production of high-quality, durable ductile iron spun pipes suitable for various applications.

[0034]

[0029] The production of ductile iron spun pipes involves the use of sand cores, which are essential for forming the spigot ends of the pipes. The process starts with the selection and approval of river sand (compliant with the quality assurance plan, QAP), which must be sieved at mining sites before being transported to the spun pipe plant. Due to the remote location of the river beds and the manual labor-intensive nature of sand mining, this stage is costly and environmentally sensitive. After transportation, the sand undergoes sieving, chemical analysis, and is stored in a sand storage pit. It is then prepared using machines such as the Muller, mixture, and aerator before being tested and stored for use in core preparation. Cores are made using core shooters or core boxes and undergo natural drying before being stored and ready for use, often for up to several months. This entire process, including core preparation, requires substantial storage space and is prone to delays due to weather conditions, particularly during the monsoon season.

[0030] A ductile iron spun pipe plant with an installed capacity of 180,000 MT per year (15,000 MT per month) requires significant infrastructure for sand handling and core production. This includes a covered area of 10,000 m2, with additional uncovered space for sand storage (6,000-10,000 MT capacity). Monthly sand consumption and disposal each range between 600-700 MT. Additionally, chemicals such as resin, hardeners, catalysts, and firewood are required in substantial quantities. The process also requires periodic replacement of core boxes and die for the core shooter. The workforce for operating this process consists of a senior manager, a manager, supervisors, operators, and a large number of unskilled or semiskilled laborers. The plant's core shop generates hazardous waste and fumes, making it one of the most environmentally detrimental stages of production. This process also experiences high attrition rates and contributes to the highest rejection rates in finished pipes, underscoring the need for improvements in efficiency and sustainability.

[0035]

[0031] In summary, the sand core production process is both costly and environmentally challenging, involving high manual labor and generating significant waste. It is a critical yet neglected aspect of ductile iron spun pipe production, which has direct implications on both the environmental impact and overall cost-effectiveness of the manufacturing process. The system’s inefficiencies contribute to frequent delays, hazardous waste generation, and a high rejection rate of finished pipes, highlighting the need for more sustainable alternatives.

[0036]

[0032] To address these issues, the present invention provides a reusable metal extractor aims to resolve these problems and providing a more efficient method of production. The reusable extractor is a sustainable and cost-effective implantation that minimizes waste, reduces manpower requirements, and improves the overall quality of the pipes produced.

[0037]

[0033] Figure 1 A illustrates a perspective view of a reusable extractor, in accordance with an embodiment of the present invention. Figure 1 B illustrates a front view of a reusable extractor, in accordance with an embodiment of the present invention. Referring to Figure 1 B, the reusable extractor (100) includes a core holder (104). The core holder (104) includes a plurality of links (102). The core holder (104) is made of up of metal. The core holder. The core holder (104) is coupled to a sliding shaft (1 10). The sliding shaft (110) is configured to the core holder (104) in a slidable manner.

[0038]

[0034] Figure 2 illustrates an exploded view of a reusable extractor, in accordance with an embodiment of the present invention. Figure 3A and 3B illustrate a side view of a reusable extractor, in accordance with an embodiment of the present invention. The core holder (104) further includes a front plate and a rear plate. The front plate and the rear plate include a plurality of links (102) which are joined to the slidable shaft (1 10) to secure a core.

[0039]

[0035] The extractor assembly (100) further includes a geared motor assembly (101 ) and a spring assembly that hold and operates the core (104) via the slidable shaft (1 10). In an embodiment, the core is rotated to the produce the spun pipe after placing the reusable metal extractor (100).

[0040]

[0036] In an embodiment, the extractor (100) includes at least two collapsible parts namely a first collapsible part (106) and a second collapsible part (108). The size of the first collapsible part (106) and the second collapsible part (108) may be different.

[0041]

[0037] The first collapsible part (106) is coupled to the core holder (104). The first collapsible part (104) is divided into a plurality of first parts. For example, the round shaped extractor may be divided into for example, 3 equal parts, 4 equal parts, 6 equal parts, 9 equal parts, or 12 equal parts or up to 36 equal parts or higher. The size of each part is same and the different parts are placed at equidistance from each other.

[0042]

[0038] The second collapsible part (108) is coupled to the core holder (102). The second collapsible part (108) is divided into a plurality of second parts. For example, the round shaped extractor may be divided into for example, 3 equal parts, 4 equal parts, 6 equal parts, or 9 equal parts 12 equal parts or up to 36 equal parts or higher. The size of each part is same and the different parts are placed at equidistance from each other. Further, the first collapsible part (106) and the second collapsible part (108) are divided into equal number of parts based on the pipe size and weight, ensuring uniformity and ease of handling during production.

[0043]

[0039] For example, for illustration purpose in FIGURE 1 B, the first collapsible part (106) is divided into 6 equal parts and the second collapsible part (108) are divided into 6 equal parts. As shown in FIG. 1 B, A size of each part of the first collapsible part (106) is larger than a size of each part the second collapsible part. Each of the first collapsible part (106) and the second collapsible part (108) is of a metal.

[0044]

[0040] In an embodiment, after producing the spun pipe, the second collapsible part (108) is collapsed from the core holder (104) subsequent to collapsing of the first collapsible part (106). The second collapsible part (108) and the first collapsible part (106) collapsed to remove the produced spun pipe, each of the first collapsible part (106) and the second collapsible part (108) are collapsed using an actuator switch.

[0045]

[0041] The process of manufacturing the extractor (100) involves several precise steps that begin with creating a detailed 2D diagram. This initial design is then converted into a 3D diagram, allowing for a more accurate visualization and better understanding of the assembly's structure and function. Following this, the 3D model is split into three to 36 segments based on the pipe size and weight, ensuring uniformity and ease of handling during production. The number of segments is adjusted according to the specific requirements of the pipe diameter and the weight of the core, type of automation of reusable extractor assembly design (manual , semi auto , fully auto extractor assembly design), which ensures that the extractor (100) can be effectively used across various pipe sizes.

[0042] Once the 3D model is segmented, a metallic pattern is prepared. This pattern is carefully crafted with necessary allowances, including pattern allowance, shrinkage allowance, and machining allowance to account for material behavior during the casting process. The next step is the molding and pouring of the metallic pattern. This involves creating a mold that will hold the molten metal in place while it solidifies. After casting, the assembly undergoes heat treatment to improve its strength and thermal stability, followed by Quality Assurance Procedures (QAP) to ensure the assembly meets all required specifications.

[0046]

[0043] The next phase involves proof machining and non-destructive testing (NDT), which are crucial steps to verify the integrity and structural soundness of the extractor assembly. These tests ensure that the material has no internal flaws and meets all dimensional requirements. Once this is confirmed, final machining is performed to achieve the exact precision necessary for the extractor to function properly. The final step is the mounting and assembly of the extractor, which is ready for installation in the ductile iron pipe manufacturing process.

[0047]

[0044] The design of the extractor assembly allows for different levels of operation depending on the pipe size: Manual operation is suitable for smaller pipes (DN 100-350), Semiautomation can be used for pipes - 400 - 700, Full automation is ideal for larger pipes (DN 700 and above). This flexibility ensures that the extractor assembly can be integrated into a wide range of production lines, from small-scale operations to fully automated facilities.

[0048]

[0045] The production process is supported by advanced multi-tasking machinery, such as a 7-axis CNC worm profile machine. This machine is capable of performing all machining operations, from raw material input to the final machining, with high speed, precision, and accuracy. The machine’s ability to define acceleration, jerks, and make precise adjustments allows for efficient production, reducing setup time and ensuring perfect precision matching. The machinery ensures that faces and bores are perfectly aligned and interchangeable, which enhances the overall efficiency of the manufacturing process.

[0049]

[0046] The materials used for the extractor assembly are carefully selected to ensure durability and high-performance under extreme conditions. These materials include copper, aluminum bronze, commercial cast iron (with high silicon content), ferritic SG iron, Si-Mo grade SG iron, Ni-Resist D5S, SS 309 / 310 stainless steel, and mild steel. These materials offer a combination of high strength, thermal stability, wear resistance, and corrosion resistance, making them ideal for the demanding environment of ductile iron pipe production.

[0050]

[0047] The design criteria of the extractor assembly are focused on ensuring ease of use, uniformity, and durability. The assembly features a 3-9 split design, (up to 36 or higher) which allows for interchangeability and uniformity across different pipe sizes. The components are designed with localized locking at regular spacing (from the ID to the OD, with tapering) to ensure secure operation. The assembly also includes equiaxed puller inserts for efficient core removal and split hole assemblies in a male-female arrangement to allow for easy disassembly and reassembly. Additionally, the design provides expansion relief to accommodate thermal expansion and ensures that wear-out parts are weldable, replaceable, and repairable, further extending the lifespan of the extractor assembly and reducing maintenance costs.

[0051]

[0048] This innovative extractor assembly design will significantly improve the efficiency, sustainability, and cost-effectiveness of ductile iron spun pipe production by eliminating the use of disposable sand cores, reducing hazardous waste, and improving overall product quality.

[0052]

[0049] Technical advantages of the invention:

[0053] • The present invention replaces the use of traditional sand cores in the production of ductile iron spun pipes with a reusable metallic extractor assembly. This innovative solution offers numerous advantages over the conventional sand core method. The metallic extractor assembly is designed to be thermally stable and strong, capable of withstanding temperatures exceeding 1400°C. It features minimal thermal expansion, high fatigue strength, and excellent wear and abrasion resistance. Additionally, the extractor is removable, replaceable, and repairable, making it both durable and cost- effective. Its uniform dimensional accuracy and ease of installation make it user- friendly and economical, addressing key challenges faced in the traditional process.

[0054] • The invention converts the core assembly into a more efficient and scientifically optimized manufacturing process. By replacing single-use sand cores with a reusable metallic assembly, the invention aims to streamline the production process, reduce waste, and improve the overall efficiency of pipe manufacturing. This shift also helps in pollution control, as the production of sand cores and their disposal generate significant environmental hazards, including chemical fumes and waste. By eliminating the need for sand cores, the invention will reduce the amount of waste produced and minimize the environmental impact of ductile iron pipe manufacturing.

[0055] • The invention also targets rejection control by improving the accuracy and consistency of the manufacturing process. Traditional sand cores are prone to breakage and other defects, leading to higher rejection rates in finished pipes. By replacing sand cores with the metallic extractor assembly, the likelihood of defects, such as pipe bursts caused by core breakage, is significantly reduced. This results in reduced rework of pipes and ensures higher-quality finished products with fewer defects. The elimination of core breakage will also lead to a more consistent and reliable production output, enhancing the overall quality control of the pipes. • A key benefit of this invention is the reduction of production costs. The reusable metallic core system is not only more durable but also eliminates the need for frequent purchasing and disposal of sand cores, boxes core die and core making machines which contributes significantly to the overall cost of production. The invention will also reduce the associated labor and logistical costs tied to handling, transporting, and storing sand. Moreover, by improving the efficiency of the core assembly process, the invention will directly lead to a reduction in production costs, making ductile iron spun pipes more affordable and competitive in the market.

[0056] • Finally, the most important benefit of this invention is to eliminate the potential hazardous waste generated in the ductile iron spun pipe production process. As mentioned, sand core production and disposal contribute to hazardous waste generation, with over 50% of the waste coming from used and rejected sand cores. By replacing sand cores with a reusable metallic system, the invention will reduce hazardous waste generation by approximately 50%, providing a more sustainable solution for pipe manufacturers. This reduction in waste, along with the other improvements in quality, cost, and environmental impact, positions the invention as a highly beneficial advancement in ductile iron spun pipe production.

[0057]

[0050] Although the subject matter has been described in language specific to structural features and / or methods in considerable detail with reference to certain preferred embodiments thereof, it is to be understood that the implementations and / or embodiments are not necessarily limited to the specific features or methods described. The examples described in detail here are only some possible embodiments of the invention among others and it could be subjected to many alterations and variants within the grasp of those skilled in the art. As such, the spirit and scope of the appended claims should not be limited to the description of the preferred embodiments contained therein.

[0058] Dated this 23 / 1 1 / 2023

Claims

WE CLAIM:

1. A reusable extractor (100) for producing spun pipes, comprising: a core holder (104), the core holder (104) includes a plurality of links (102); a first collapsible part (106) coupled to the core holder (104), the first collapsible part is divided into a plurality of first parts; and a second collapsible part (108) coupled to the core holder (102), the second collapsible part (108) is divided into a plurality of second parts, wherein a size of each part of the plurality of first parts of the first collapsible part is larger than a size of each part of the plurality of second parts of the second collapsible part, and each of the first collapsible part (106) and the second collapsible part (108) is of a metal.

2. The reusable extractor (100) as claimed in claim 1 , wherein a number of the plurality of first parts of the first collapsible part (106) is equal to a number of the plurality of second parts of the second collapsible part (108).

3. The reusable extractor (100) as claimed in claim 1 , wherein after producing the spun pipe, the second collapsible part (108) is collapsed from the core holder (104) subsequent to collapsing of the first collapsible part (106), wherein the first collapsible part (106) and the second collapsible part (108) collapsed to remove the produced spun pipe.

4. The reusable extractor (100) as claimed in claim 1 , wherein the core holder (104) is coupled to a sliding shaft (1 10).

5. The reusable extractor (100) as claimed in claim 1 , wherein the sliding shaft (110) is configured to hold each of the core holder (104), the first collapsible part (106), and the second collapsible part (108) in a slidable manner.

6. The reusable extractor (100) as claimed in claim 1 , wherein the core holder (104) further includes a front plate and a rear plate.

7. The reusable extractor (100) as claimed in claim 1 , wherein the core holder (104) is coupled to a spring assembly (103) and a geared motor assembly (101 ).

8. The reusable extractor (100) as claimed in claim 3, wherein each of the first collapsible part (106) and the second collapsible part (108) are collapsed using an actuator switch.

9. The reusable extractor (100) as claimed in claim 1 , wherein an accuracy of fitment and socket end of the spun pipe is directly proportional to the size of each of the first collapsible part (106) and the second collapsible part (108).

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