Stator manufacturing mold of mono pump

Abstract

The manufacturing mold for the stator of the mono pump of the present invention comprises: a lower die (130) in the shape of a rectangular housing with an open upper surface and a space formed inside; a right cover core (140) inserted into the lower die (130), which has a cylindrical structure with a hollow portion formed therein and is provided with a through-shaped 'inlet or outlet' (L) on one side; a left cover core (150) inserted into the lower die (130), which is coupled to the right cover core (140), which has a hollow portion formed therein and is provided with a through-shaped 'inlet or outlet' (L) on one side; a right core (160) which has a cylindrical structure with a hollow portion formed inside and is fitted and coupled to the right cover core (140); a left ring (170) which has a cylindrical structure with a hollow portion formed inside and is fitted and coupled to the left cover core (150); and a cylindrical structure having a hollow portion (191) formed inside. The gist of the invention is to include a pipe die (190) provided on an inner surface where a right cover core (140) and a left cover core (150) are combined, a stator core (110) provided inside the pipe die (190), an upper die (120) coupled to a lower die (130) and having a cylinder cover insertion groove (121) provided on its upper surface, and a cylinder cover (180) inserted into the cylinder cover insertion groove (121) of the upper die (120).

Description

Technology Field

[0001] The present invention relates to a stator of a monopump, and more specifically, to a mold for manufacturing a stator of a monopump that can be guided to an accurate position and seated in a mold for injection, and can be firmly supported so as not to move during the injection process, thereby enabling uniform injection overall and allowing the molded product to be easily separated from the mold after injection. Background Technology

[0002] The mono pump was invented in 1930 by a French mathematician named René Moineau at the request of the French Air Force. It is also known as a progressive cavity pump, eccentric screw pump, or helical rotor pump, and is a device capable of compressing and transporting highly viscous fluids to continuously discharge them. It is used in various fields such as chemicals, paints, cosmetics, paper pulp, sugar refining, ceramics, agriculture and fisheries, civil engineering and construction, mining, ships, concentrated sludge, chemical sludge, coagulants, oil sludge, or bilge.

[0003] Although the above mono pump has a long history, it is still in steady use, and recently, it has been manufactured in ultra-compact sizes and applied as a dispensing pump in the automotive and high-tech precision electronics industries.

[0004] Figure 1 is a partially cutaway perspective view of a conventional mono pump.

[0005] As described above, a configuration of a monopump is known that continuously transfers high-concentration and high-viscosity fluids, which are difficult to move with a conventional pump, without damaging the raw material, pulsation-free, and in a precise quantity by means of a rotor that performs eccentric rotational motion inside the stator.

[0006] However, since stators manufactured by rubber injection are not easy to produce, there was a problem requiring the development of technology to manufacture stators more easily. Prior art literature

[0007] Korean Registered Patent Publication No. 10-1610904 (Published on April 8, 2016) The problem to be solved

[0008] The present invention aims to solve the above-mentioned problems by providing a manufacturing mold for a monopump stator that can guide and seat the product in an accurate position when seated in the mold for injection, and can firmly support the product to prevent movement during the injection process, thereby enabling uniform injection overall and allowing the molded product to be easily separated from the mold after injection. means of solving the problem

[0009] The manufacturing die for the stator of the mono pump of the present invention comprises: a lower die having the shape of a rectangular housing with an open upper surface and an internal space; a right cover core inserted into the lower die, having a cylindrical structure with a hollow portion and provided with a through-shaped 'inlet or outlet' on one side; a left cover core inserted into the lower die, coupled with the right cover core, having a cylindrical structure with a hollow portion and provided with a through-shaped 'inlet or outlet' on one side; a right core having a cylindrical structure with a hollow portion and fitted and coupled to the right cover core; a left ring having a cylindrical structure with a hollow portion and fitted and coupled to the left cover core; a pipe die having a cylindrical structure with a hollow portion and provided on the inner surface where the right cover core and the left cover core are coupled; a stator core provided inside the pipe die; an upper die coupled to the lower die and provided with a cylinder cover insertion groove on the upper surface; and a cylinder cover of the upper die. It is characterized by including a cylinder cover inserted into an insertion groove.

[0010] In addition, the lower die is characterized by comprising a key insertion groove in which a key is inserted and fixed, which is provided in the shape of a recessed groove in the center of the inner bottom surface; a cover core insertion groove provided in a semicircular shape on both sides; and a 'right core support protrusion insertion groove' and a 'left ring support protrusion insertion groove' provided in a semicircular shape having a smaller radius than the cover core insertion groove, spaced apart from the cover core insertion groove.

[0011] In addition, the right cover core is characterized by including an internal protruding projection that protrudes in a ring shape on the right side of the inner surface of the hollow part, with the left side forming a right pipe die locking projection and the right side forming a right core locking projection, a right core insertion opening provided in a shape penetrating the right side, an insertion groove in which a ring-shaped groove having a step is formed on the left side, and a key groove provided in the shape of a recessed groove on the lower side of the outer surface.

[0012] In addition, the left cover core is characterized by including an internal protruding projection that protrudes in a ring shape on the left side of the inner surface of the hollow part, with the right side forming a left pipe die catch and the left side forming a left ring catch; a left ring insertion opening provided in a shape penetrating the left side; a protruding opening formed in a ring shape protruding with a step on the right side, which is fitted and coupled into an insertion groove formed in the right cover core; and a key groove provided in the shape of a recessed groove on the lower side of the outer surface.

[0013] In addition, the right core is characterized by including a protruding projection that protrudes in a ring shape on one side of the outer surface in the right direction and forms a locking projection on the left side, a supporting projection that protrudes in a ring shape on the right side and is fitted and coupled into an insertion groove for the right core supporting projection formed in the upper die and the lower die, and an inclined surface having a structure inclined from the bottom surface of the locking projection toward a virtual centerline.

[0014] In addition, the left ring is characterized by including a protruding projection that protrudes in a ring shape on one side of the outer surface in the left direction and forms a locking projection on the right side, and a supporting projection that is structured to protrude in a ring shape on the left side and is fitted and coupled into an insertion groove for the left ring supporting projection formed in the upper die and the lower die.

[0015] In addition, the stator core is characterized by having a left support shaft protruding from the left side and being fitted and coupled into the hollow of the left ring, a right support shaft protruding from the right side and being fitted and coupled into the hollow of the right core, and having a pin hole formed on the right side and being coupled and fixed by a pin to the pin hole provided on the left side of the right core.

[0016] Additionally, the upper die comprises a partition formed horizontally in the center to separate the upper and lower parts and having an 'inlet or outlet' on one side or the other side, cover core insertion grooves provided in a semicircular cut shape on both sides, and 'right core support protrusion insertion groove' and 'left ring support protrusion insertion groove' provided in a semicircular cut shape having a smaller radius than the cover core insertion groove, spaced apart from the cover core insertion grooves formed on both sides; wherein a cylinder cover having an insertion part protruding from the bottom surface is coupled to a cylinder cover insertion groove provided in a recessed shape on the open upper surface. Effects of the invention

[0017] The present invention has a combination of effects: the ability to guide and seat the product in an accurate position when seated in the mold for injection; the ability to firmly support the product to prevent movement during the injection process, thereby enabling uniform injection; and the ability to easily separate the molded product from the mold after injection. Brief explanation of the drawing

[0018] FIG. 1 is a partially cutaway perspective view of a conventional mono pump. FIG. 2 is a plan view and a side view of the stator manufacturing mold of the present invention. Figure 3 is a cross-sectional view along line AA in Figure 2. Fig. 4 is an enlarged view of the stator core. FIG. 5 is a plan view, a cross-sectional view along line AA, and a cross-sectional view along line BB of an upper die. FIG. 6 is a plan view, a cross-sectional view along line AA, and a cross-sectional view along line BB of the lower die. FIG. 7 is a cross-sectional view of the right cover core. FIG. 8 is a cross-sectional view of the left cover core. Fig. 9 is a cross-sectional view of the right core. FIG. 10 is a cross-sectional view of the left ring. FIG. 11 is a plan view, front view, and side view of a cylinder cover. FIG. 12 is a front view of the pipe body. Specific details for implementing the invention

[0019] Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. For reference, the size, line thickness, etc., of the components illustrated in the drawings referenced for describing the present invention may be depicted somewhat exaggerated for ease of understanding.

[0020] Furthermore, the terms used in the description of the present invention are defined considering their functions within the invention and may vary depending on the user's or operator's intent, convention, etc. Accordingly, it is appropriate to define these terms based on the entire content of this specification.

[0021] Furthermore, in this application, terms such as 'comprising' and 'having' refer to the existence of specific numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not excluding in advance the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0022] In addition, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms, and the embodiments provided are merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention.

[0023] Therefore, the present invention is susceptible to various modifications and may take various forms, and embodiments (aspects or examples) are to be described in detail in the specification. However, this is not intended to limit the present invention to specific disclosed forms, and it should be understood that it includes all modifications, equivalents, and substitutions that fall within the technical scope of the present invention, and singular expressions used in this specification include plural expressions unless the context clearly indicates otherwise.

[0024] However, in describing the present invention, specific descriptions of well-known or known functions or configurations are omitted in order to clarify the gist of the invention.

[0025] Specific embodiments of the present invention will be described below with reference to the drawings.

[0026] FIG. 2 is a plan view and a side view of the stator manufacturing mold of the present invention, FIG. 3 is a cross-sectional view along line AA of FIG. 2, FIG. 4 is an enlarged view of the stator core, FIG. 5 is a plan view, a cross-sectional view along line AA, and a cross-sectional view along line BB of the upper die, FIG. 6 is a plan view, a cross-sectional view along line AA, and a cross-sectional view along line BB of the lower die, FIG. 7 is a cross-sectional view of the right cover core, FIG. 8 is a cross-sectional view of the left cover core, FIG. 9 is a cross-sectional view of the right core, FIG. 10 is a cross-sectional view of the left ring, FIG. 11 is a plan view, a front view, and a side view of the cylinder cover, FIG. 12 is a front view of the pipe body.

[0027] As described above, the present invention’s ‘stator manufacturing mold for a monopump’ (100; hereinafter referred to as ‘stator manufacturing mold’) comprises a stator core (110), an upper die (120), a lower die (130), a right cover core (140), a left cover core (150), a right core (160), a left ring (170), a cylinder cover (180), and a pipe die (190).

[0028] The stator core (110) has the shape of a rotor (see FIG. 1), and on the left side, a left support shaft (112) having a diameter smaller than the diameter of the stator core (110) is protruded and fitted into the hollow of the left ring (170) described later, and on the right side, a right support shaft (111) having a diameter smaller than the diameter of the stator core (110) is protruded and fitted into the hollow of the right core (160) described later.

[0029] In addition, a pinhole (H) is formed on the right side, and is coupled and fixed by a 'pin' to the pinhole (H) provided on the left side of the right core (160) described later.

[0030] The stator core (110) described above is provided in a form inserted into the interior of the pipe die (190) described later, thereby forming a certain space between it and the pipe die (190), and thus has the function and effect of being able to manufacture a stator by injecting an injection liquid into that space.

[0031] The lower die (130) has the shape of a rectangular housing with an open upper surface and a space formed inside, and is provided with a cover core insertion groove (131), a key insertion groove (132), a right core support protrusion insertion groove (123), and a left ring support protrusion insertion groove (133).

[0032] The above key insertion groove (132) is provided in the shape of a recessed groove in the center of the inner bottom surface of the lower die (130), into which a key (K) is inserted and fixed, and the upper part of the protruding key (K) is fitted and fixed into the key groove (154) provided on the bottom surface of the left cover core (150) and the key groove (146) provided on the bottom surface of the right cover core (140), which will be described later.

[0033] The above cover core insertion groove (131) is provided in a semicircular shape on both sides of the lower die (130) and has the function of inserting and supporting the right cover core (140) and left cover core (150) described later.

[0034] The above 'right core support protrusion insertion groove (123)' and 'left ring support protrusion insertion groove (133)' are provided in a semicircular shape with a smaller radius than the cover core insertion groove (131) formed on both sides of the lower die (130) at a certain distance from the cover core insertion groove (131), and have the function of supporting the support protrusion (162) provided on the right side of the right core (160) and the support protrusion (172) provided on the left side of the left ring (170) by inserting them.

[0035] The upper die (120) is coupled to the lower die (130) and has the shape of a rectangular housing with the upper and lower surfaces open and a partition (124) formed in the center, and is provided with a cylinder cover insertion groove (121), a cover core insertion groove (122), a right core support protrusion insertion groove (123), and a left ring support protrusion insertion groove (133).

[0036] The above partition (124) is formed horizontally in the center of the upper die (120) to separate the upper and lower parts, and an 'inlet or outlet' (L) is provided on one side or the other side of the partition (124) to function as a passage through which the injection liquid flows.

[0037] The cylinder cover insertion groove (121) is provided in a recessed shape on the open upper surface of the upper die (120), so that the cylinder cover (180) described later is inserted.

[0038] The above cover core insertion groove (122) is provided in a semicircular shape on both sides of the upper die (120) and has the function of supporting the right cover core (140) and left cover core (150), which will be described later, by inserting them in a downward direction.

[0039] That is, it has the same function and effect as the cover core insertion groove (131) formed in the lower die (130).

[0040] The above 'right core support protrusion insertion groove (123)' and 'left ring support protrusion insertion groove' (133) are provided with a shape that is cut into a semicircle with a smaller radius than the cover core insertion groove (122), at a certain distance from the cover core insertion groove (122) formed on both sides of the upper die (120), and have the function of supporting in a downward direction by inserting the support protrusion (162) provided on the right side of the right core (160) and the support protrusion (172) provided on the left side of the left ring (170), which will be described later.

[0041] That is, it has the same function and effect as the 'right core support protrusion insertion groove (123)' and 'left ring support protrusion insertion groove (133)' formed in the lower die (130).

[0042] It goes without saying that the lower die (130) and the upper die (120) can be joined by a 'pin'.

[0043] The right cover core (140) is inserted into the lower die (130) and has a cylindrical structure with a hollow portion formed inside, and is provided with a through-shaped 'inlet or outlet' (L) on one side, which functions as a passage for the injection liquid to flow through, and the 'inlet or outlet' (L) is connected to the 'inlet or outlet' (L) provided in the partition wall (124) of the upper die (120).

[0044] The right cover core (140) as described above includes a right pipe die catch (141), an insertion groove (142), an internal protrusion (143), a right core catch (144), a right core insertion opening (145), and a keyway (146).

[0045] The above-mentioned internal protruding projection (143) is provided with a ring-shaped structure protruding to the right side of the inner surface of the hollow portion of the right cover core (140), and the left side of the internal protruding projection (143) forms a right pipe die catch projection (141), thereby having the function of supporting the right end of the pipe die (190) described later.

[0046] Additionally, the right side of the internal protruding jaw (143) forms a right core catch jaw (144), and is supported in a state where the catch jaw (161) of the right core (160), described later, is in surface contact.

[0047] The above right core insertion opening (145) is provided in a shape that penetrates the right side of the right cover core (140), and the right core (160) described later is inserted therein.

[0048] The above insertion groove (142) is formed as a ring-shaped groove having a step on the left side of the right cover core (140), so that the protrusion (153) of the left cover core (150), which will be described later, is fitted and coupled.

[0049] The above key groove (146) is provided in the shape of a recessed groove on the lower side of the outer surface of the right cover core (140) and is provided in a direction facing the key insertion groove (132) formed on the inner bottom surface of the lower die (130), so that a key (K) is inserted and fixed and coupled.

[0050] The left cover core (150) is combined with the right cover core (140) and inserted into the lower die (130), and has a cylindrical structure with a hollow portion formed inside, and is provided with a through-shaped 'inlet or outlet' (L) on one side, which functions as a passage for the injection liquid to flow through, and the 'inlet or outlet' (L) is connected to the 'inlet or outlet' (L) provided in the partition wall (124) of the upper die (120).

[0051] The above left cover core (150) includes a left pipe die catch (151), a left ring catch (152), a protrusion (153), a keyway (154), a left ring insertion hole (155), and an internal protrusion (156).

[0052] The above internal protruding projection (156) is provided with a ring-shaped structure protruding from the left side of the inner surface of the hollow portion of the left cover core (150), and the right side of the internal protruding projection (156) forms a left pipe die catch projection (151) to support the left end of the pipe die (190) described later.

[0053] Additionally, the left side of the inner protruding jaw (156) forms a left ring catch jaw (152), so that the catch jaw (171) of the left ring (170), described later, is supported in a state of surface contact.

[0054] The above-mentioned left ring insertion opening (155) is provided in a shape that penetrates the left side of the left cover core (150), and the left ring (170) described later is inserted therein.

[0055] The above-mentioned protrusion (153) is formed as a ring-shaped protrusion having a step on the right side of the left cover core (150) and is fitted and coupled into the insertion groove (142) formed in the right cover core (140).

[0056] The above key groove (154) is provided in the shape of a recessed groove on the lower outer surface of the left cover core (150) and is provided in a direction facing the key insertion groove (132) formed on the inner bottom surface of the lower die (130), and a key (K) is inserted and fixed.

[0057] That is, the right cover core (140) and the left cover core (150) are fitted and combined by means of the protrusion (153) and the insertion groove (142) to have an overall cylindrical shape, and are fitted and combined in a surface contact state with the cover core insertion grooves (122) (131) formed in the upper die (120) and the lower die (130).

[0058] In addition, the key groove (146) provided on the bottom surface of the right cover core (140) and the key groove (154) provided on the bottom surface of the left cover core (150) are connected to each other, and are coupled and fixed by a key (K) to the key insertion groove (132) of the lower die (130), thereby having the function and effect of positioning and fixing the coupled left and right cover cores (140) (150) on the inner bottom surface of the lower die (130) by a key (K).

[0059] The right core (160) has a cylindrical structure with a hollow portion formed inside, and is fitted and coupled into the right core insertion opening (145) formed on the right side of the right cover core (140), and has a pin hole (H) formed on the left side, and is fitted and coupled into the pin hole (H) formed on the left side of the stator core (110) by a pin.

[0060] The above right core (160) includes a stopper (161), a support protrusion (162), a protruding protrusion (163), and an inclined surface (164).

[0061] The above protruding projection (163) has a ring-shaped structure protruding from one side of the outer surface of the right core (160) in the right direction, and the left side of the protruding projection (160) forms a locking projection (161) to be coupled to the right core locking projection (144) of the right cover core (140) in a surface contact state.

[0062] The above support protrusion (162) has a ring-shaped structure protruding from the right side of the right core (160) and is fitted and coupled into the semicircular right core support protrusion insertion groove (123) formed in the upper die (120) and the lower die (130).

[0063] The above-mentioned inclined surface (164) has a structure that is inclined toward an imaginary center line from the bottom surface of the catch (161), which is the surface that contacts the inner protruding ridge (143) of the right cover core (140) as the right core (160) is inserted into the right core insertion opening (145) of the right cover core (140), thereby having the function and effect of facilitating insertion and connection. In addition, the outer surface of the inclined surface (164) is positioned on the same line as the outer surface of the stator core (110), so that the space between the stator core (110) and the pipe die (190) described later is connected without creating a step, thereby having the function of forming a smooth inner surface without creating a step in the molded stator.

[0064] The left ring (170) has a cylindrical structure with a hollow portion formed inside, and is fitted and coupled to the left ring insertion opening (155) formed on the left side of the left cover core (150), and includes a locking projection (171), a supporting projection (172), and a protruding projection (173).

[0065] The above-mentioned protruding projection (173) has a structure that protrudes in a ring shape on one side of the left side of the outer surface of the left ring (170), and the right side of the protruding projection (173) forms a locking projection (171) to be coupled to the left ring locking projection (152) of the left cover core (150) in a surface contact state.

[0066] The above support protrusion (172) has a structure that protrudes in a ring shape on the left side of the left ring (170), and is fitted and coupled into the semicircular left ring support protrusion insertion groove (133) formed in the upper die (120) and the lower die (130).

[0067] The pipe die (190) has a cylindrical structure with a hollow portion (191) formed inside and is provided on the inner surface where the right cover core (140) and the left cover core (150) are combined, thereby forming a certain gap with the stator core (110), so that an injection molded material can be introduced into the space formed by the gap to manufacture the stator.

[0068] The cylinder cover (180) has the shape of a rectangular plate and is provided with an insertion part (181) protruding from its bottom surface. It is inserted into a cylinder cover insertion groove (121) formed on the upper part of the upper die (120) and functions to seal the 'inlet or outlet (L)' while pressurizing the injection liquid.

[0069] If we examine the assembly relationship of the stator manufacturing mold as described above,

[0070] With the left ring (170) attached to the left cover core (150), the pipe die (190) is fitted and attached inside the left cover core (150), and then the stator core (110) is inserted into the hollow portion of the left ring (170) from the inside of the pipe die (190).

[0071] Next, with the right core (160) attached to the right cover core (140), the left cover core (150) and the right cover core (140) are attached, and the stator core (110) and the right core (160) are attached with a 'pin'.

[0072] Next, the assembled cover core (140)(150) is assembled into the lower die (130). With the key (K) coupled to the key insertion groove (132) on the bottom surface of the lower die (130), the key (K) is coupled to the key groove (146)(154) on the bottom surface of the cover core (140)(150), thereby ensuring that the cover core (140)(150) is coupled to the correct position on the lower die (130).

[0073] Next, the upper die (120) is combined with the lower die (130), and the cylinder cover (180) is attached to the upper part of the upper die (120), thereby completing the stator manufacturing mold (100).

[0074] The stator manufacturing mold of the present invention, as described above, has a combination of effects: the ability to guide and seat the product in an accurate position when seated in the mold for injection; the ability to firmly support the product to prevent movement during the injection process, thereby enabling uniform injection; and the ability to easily separate the molded product from the mold after injection. Explanation of the symbols

[0075] 100: Stator manufacturing die 110: Stator core 111: Right support axis 112: Left support axis 120: Upper die 121: Cylinder cover insertion groove 122,131: Cover core insertion groove 123,133: Insertion groove for right core support protrusion or left ring support protrusion 124: Bulkhead 130: Lower die 132: Key insertion slot 140: Right cover core 141: Right pipe die stopper 142: Insertion groove 143,156: Internal protruding jaw 144: Right core catch jaw 145; Right core insertion slot 146,154: Keyway 150: Left cover core 151: Left pipe die stopper 152: Left ring catch 153: Protrusion 155: Left ring insertion port 160: Right core 161,171: Stopper 162,172: Support protrusion 163,173: Protruding jaw 164: Sloping surface 170: Left ring 171: Catching tab 180: Cylinder cover 181: Insertion part 190: Pipe die 191: Hollow part K: Key L: Inlet or outlet H: Pinhole

Claims

Claim 1 A lower die (130) in the shape of a rectangular housing with an open upper surface and an internal space formed therein; a right cover core (140) inserted into the lower die (130), which has a cylindrical structure with a hollow portion formed therein and is equipped with a through-shaped 'inlet or outlet' (L) on one side; a left cover core (150) inserted into the lower die (130), which is coupled with the right cover core (140), which has a hollow portion formed therein and is equipped with a through-shaped 'inlet or outlet' (L) on one side; a right core (160) which has a cylindrical structure with a hollow portion formed therein and is fitted and coupled to the right cover core (140); a left ring (170) which has a cylindrical structure with a hollow portion formed therein and is fitted and coupled to the left cover core (150); a cylindrical structure with a hollow portion (191) formed therein, and the right cover core (140) and A manufacturing mold for a stator of a mono pump, characterized by including a pipe die (190) provided on an inner surface to which a left cover core (150) is coupled, a stator core (110) provided inside the pipe die (190), an upper die (120) coupled to a lower die (130) and having a cylinder cover insertion groove (121) provided on its upper surface, and a cylinder cover (180) inserted into the cylinder cover insertion groove (121) of the upper die (120). Claim 2 A manufacturing mold for a stator of a mono pump according to claim 1, wherein the lower die (130) is provided in the shape of a recessed groove in the center of the inner bottom surface and includes a key insertion groove (132) into which a key (K) is inserted and fixed, a cover core insertion groove (131) provided in a semicircular shape on both sides, and a 'right core support protrusion insertion groove (123)' and a 'left ring support protrusion insertion groove (133)' provided in a semicircular shape having a smaller radius than the cover core insertion groove (131) at a certain distance from the cover core insertion groove (131). Claim 3 A manufacturing mold for a stator of a mono pump according to claim 2, wherein the right cover core (140) is formed in a ring shape on the right side of the inner surface of the hollow portion, and the left side forms a right pipe die catch (141) and the right side forms a right core catch (144), the right side forms an internal protruding ridge (143), the right core insertion hole (145) provided in a shape penetrating the right side, the insertion groove (142) formed in a ring shape with a step on the left side, and the key groove (146) provided in the shape of a recessed groove on the lower side of the outer surface. Claim 4 A manufacturing mold for a stator of a mono pump according to claim 3, wherein the left cover core (150) is formed in a ring shape on the left side of the inner surface of the hollow part, and the right side forms a left pipe die catch (151) and the left side forms a left ring catch (152) and an inner protruding ridge (156), a left ring insertion hole (155) provided in a shape penetrating the left side, a protruding hole (153) formed in a ring shape protruding with a step on the right side and fitted and coupled into an insertion groove (142) formed in the right cover core (140), and a key groove (154) provided in the shape of a recessed groove on the lower side of the outer surface.

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