CN216732796U - Transfer mould of screw pump stator with equal wall thickness - Google Patents
Transfer mould of screw pump stator with equal wall thickness Download PDFInfo
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- CN216732796U CN216732796U CN202123125763.3U CN202123125763U CN216732796U CN 216732796 U CN216732796 U CN 216732796U CN 202123125763 U CN202123125763 U CN 202123125763U CN 216732796 U CN216732796 U CN 216732796U
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Abstract
The utility model discloses a compression molding die of a screw pump stator with equal wall thickness, which comprises an upper die, a lower die, an end cover, a die core and a stator shell with equal wall thickness; the mold core is arranged in a cavity of the stator shell with the equal wall thickness, and the stator shell with the equal wall thickness is arranged in a mold cavity of the upper mold and the lower mold; the upper die and the lower die comprise a feeding hole, a positioning hole and upper die and lower die mounting holes, the end cover comprises a positioning hole, an exhaust port and a mounting step, the die core comprises a die core shaft, a die core shaft flat position and a die core end face, and the stator shell with the equal wall thickness comprises a diversion trench, a diversion hole and a stator shell positioning hole; two ends of the die core shaft respectively penetrate and extend out of the pair of end covers, and an annular gap is formed between the die core and the stator shell with the equal wall thickness. The problem of stator shell deformation can be solved by adopting a full-wrapping type die; through pressing in rubber in the middle of from the wall thickness stator top, only need a pressure to annotate the interface, can solve the pressure and annotate inconvenient and hardly realize miniaturized scheduling problem.
Description
Technical Field
The utility model relates to a manufacturing technical field of screw pump, in particular to transfer mould of wall thickness screw pump stator such as.
Background
The advantages of screw pumps have also become well known in recent years as they have become popular in various industries. The main core components of the screw pump are a screw with an eccentric spiral body (commonly called as a rotor) and a screw bushing with a double-line spiral surface on the inner surface (commonly called as a stator), wherein the stator is one of the heavier components, and the performance quality directly determines the service life of the screw pump. Generally, a layer of hollow spiral rubber with uneven thickness is laid in a cylindrical lining to form the stator, deformation, heat dissipation and abrasion degree of all positions of a working surface of the stator are inconsistent due to the structure, and therefore the problems that the metering of a screw pump is inaccurate, the service life is short and the like are finally caused. The most direct solutions in the prior art are: a stator with equal wall thickness is adopted. The manufacturing of the equal-wall-thickness stator is not necessary, and the conventional equal-wall-thickness stator compression molding die, such as the chinese utility model patent with patent publication No. CN 205735740U and name "a pouring device for equal-wall-thickness screw pump stator", has the advantages but also has obvious defects, because the equal-wall-thickness stator housing is directly used as a part of the compression molding die, the housing is easily deformed due to the large pressure, and the using effect is affected. In addition, the structure needs to press rubber from two ends of the stator shell with equal wall thickness, so that two sets of pressure injection ports are needed, and miniaturization is difficult to realize.
The above background disclosure is only for the purpose of assisting in understanding the inventive concepts and technical solutions of the present application and does not necessarily pertain to the prior art of the present application, and should not be used to assess the novelty and inventive step of the present application in the absence of explicit evidence to suggest that such matter has been disclosed at the filing date of the present application.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model provides a compression molding die of a screw pump stator with equal wall thickness, which aims to solve the problems that the die in the prior art can cause unsatisfactory use effect of final products and difficult miniaturization due to the problem of processing mode, and comprises an upper die, a lower die, an end cover, a die core and a stator shell with equal wall thickness;
the mold core is arranged in a cavity of the stator shell with the equal wall thickness, the stator shell with the equal wall thickness is arranged in a mold cavity of the upper mold and the lower mold, and the end covers are a pair and are respectively arranged at two ends of the upper mold and the lower mold;
the upper die and the lower die comprise a feeding hole, a positioning hole and upper die and lower die mounting holes, the end cover comprises a positioning hole, an exhaust port, an end cover mounting hole and a mounting step, the die core comprises a die core shaft, a die core shaft flat position and a die core end face, and the stator shell with the equal wall thickness comprises a diversion trench, a diversion hole and a stator shell positioning hole;
and two ends of the mold core shaft respectively penetrate and extend out of the pair of end covers, and an annular gap is formed between the mold core and the stator shell with the equal wall thickness.
The utility model discloses still can adopt following optional/preferred scheme:
the feeding holes are formed in the top surfaces of the upper die and the lower die, the number of the positioning holes is at least two, the positioning holes are formed in the top surfaces of the upper die and the lower die and distributed on two sides of the feeding holes, and the upper die and the lower die are symmetrically formed in pairs on two sides of the upper die and the lower die.
The upper die and the lower die are provided with more than two pairs of mounting holes.
The feeding port is arranged in the middle of the top surfaces of the upper die and the lower die along the length direction.
The mounting steps comprise a first step, a second step and a third step, the first step is connected with the end faces of the upper die and the lower die in a matched mode, the second step is connected with the end face of the stator shell with the same wall thickness in a matched mode, and the third step is connected with the end face of the mold core in a matched mode.
The positioning hole is a waist-shaped hole, and the shape of the cross section of the flat position of the die core shaft is matched with the outer contour of the positioning hole.
The upper die and the lower die are of an integrated structure or a split structure.
The mold core and the equal-wall-thickness stator shell are concentrically arranged, and the distance between the external thread of the mold core and each part of the internal thread of the equal-wall-thickness stator shell is equal, and the spiral angle is consistent.
The diameter of the annular gap is more than or equal to 6 mm.
The length of the annular gap along the axial direction of the mold core is less than or equal to 20 mm.
The beneficial effects of the utility model include:
the problem of stator shell deformation can be solved by adopting a full-wrapping type die; through pressing in rubber in the middle of from the wall thickness stator top, only need a pressure to annotate the interface, can solve the pressure and annotate inconvenient and difficult miniaturization scheduling problem that realizes.
Drawings
Fig. 1A is a schematic assembled structure view of the compression-injection mold of the screw pump stator with equal wall thickness according to an embodiment of the present invention.
Fig. 1B is a longitudinal sectional view of fig. 1A.
Fig. 1C is an exploded view of fig. 1A.
Fig. 2 is a schematic view of an end face structure of fig. 1.
FIG. 3A is a schematic diagram of an end cap configuration according to an embodiment.
Fig. 3B is a longitudinal cross-sectional view of the end cap of fig. 3A.
FIG. 4 is a schematic view of a mold core structure according to one embodiment.
FIG. 5 is a schematic view of an embodiment of a constant wall thickness stator housing.
Detailed Description
The invention will be further described with reference to the accompanying figures 1-5 and the specific embodiments. It should be emphasized that the following description is merely exemplary in nature and is not intended to limit the scope of the invention or its application. The background section of the present invention may contain background information related to the problems or the environment of the present invention and is not necessarily descriptive of the prior art. Accordingly, the inclusion in the background section is not an admission of prior art by the applicant.
The embodiment provides a compression molding die for a screw pump stator with equal wall thickness, which can overcome the defects in the prior art, and comprises an upper die, a lower die, an end cover, a die core and a stator shell with equal wall thickness; the mold core is arranged in a cavity of the stator shell with the equal wall thickness, the stator shell with the equal wall thickness is arranged in a mold cavity of the upper mold and the lower mold, and the end covers are a pair and are respectively arranged at two ends of the upper mold and the lower mold; the upper die and the lower die comprise a feeding hole, a positioning hole and upper die and lower die mounting holes, the end cover comprises a positioning hole, an exhaust port and a mounting step, the die core comprises a die core shaft, a die core shaft flat position and a die core end face, and the stator shell with the equal wall thickness comprises a diversion trench, a diversion hole and a stator shell positioning hole; two ends of the die core shaft respectively penetrate and extend out of the pair of end covers, and an annular gap is formed between the die core and the stator shell with the equal wall thickness.
The following detailed description is made with reference to the accompanying drawings.
As shown in fig. 1-2, the compression molding die for the screw pump stator with equal wall thickness comprises an upper die 1, a lower die 2, a die core 3 and a stator shell 4 with equal wall thickness. The upper die and the lower die 1 comprise feeding ports 11, positioning holes 12 and upper die and lower die mounting holes 13, the feeding ports 11 are formed in the top surfaces of the upper die and the lower die 1, the number of the positioning holes 12 is at least two, the positioning holes are formed in the top surfaces of the upper die and the lower die 1 and distributed on two sides of the feeding ports 11, and the upper die and the lower die mounting holes 13 are symmetrically formed in pairs on two sides of the upper die and the lower die 1. Preferably, as shown in fig. 1A, the upper and lower die mounting holes 13 are more than two pairs and have a counter bore structure, the upper and lower die mounting holes are arranged on two sides of the upper and lower die 1 at equal intervals, and the feeding port 11 is arranged on the top surface of the upper and lower die 1 in the middle along the length direction.
As shown in fig. 3A and 3B, the end cap 2 includes a positioning hole 21, an exhaust port 22, an end cap mounting hole 23, and a mounting step. Preferably, the end cover mounting holes 23 are four in number, and the mounting steps include a first step 24, a second step 25 and a third step 26. As shown in fig. 4, the mold core 3 includes a mold core shaft 31, a mold core shaft flat position 32, and a mold core end surface 33, where the mold core shaft flat position 32 is disposed at a shaft end of each mold core shaft 31 in an up-down symmetrical manner. The positioning hole 12 is preferably a waist-shaped hole, and the cross section shape of the die core shaft flat position 32 is matched with the outer contour of the positioning hole 12. As shown in fig. 5, the stator housing 4 with the equal wall thickness includes a guide groove 41, a guide hole 42, and a stator housing positioning hole 43. The first step 24 is connected with the end faces of the upper die 1 and the lower die 1 in a matched mode, the second step 25 is connected with the end face of the stator shell 4 with the equal wall thickness in a matched mode, and the third step 26 is connected with the end face of the die core 3 in a matched mode.
The equal-wall-thickness stator housing 4 is preferably made of metal, and is a hollow cylinder as shown in fig. 5, a diversion trench 41 is formed in the middle of the outer side of the equal-wall-thickness stator housing, a diversion hole 42 is formed in the diversion trench 41, as shown in fig. 1B, the thread pitch of the inner side of the equal-wall-thickness stator housing is equal to that of the mold core 3, the outer diameter of the thread is larger than that of the mold core 3, and symmetrical stator housing positioning holes 43 are formed in the two axial ends of the equal-wall-thickness stator housing.
After assembly, as shown in fig. 1A to 1C, two ends of the mold core shaft 3 respectively penetrate and extend out from the pair of end covers 2, and an annular gap 60 is formed between the mold core 3 and the stator housing 4 with the equal wall thickness. Preferably, the mold core 3 and the equal-wall-thickness stator housing 4 are arranged concentrically, the distance between the external thread of the mold core 3 and each part of the internal thread of the equal-wall-thickness stator housing 4 is equal, the spiral angle is consistent, the annular gap 60 between the two is preferably larger than or equal to 6mm in diameter, and the length of the mold core 3 in the axial direction is smaller than or equal to 20 mm.
In this embodiment, the upper and lower molds 1 are of an integral structure, but not limited thereto, and in another embodiment, a split structure may be adopted. The core 3 is preferably made of metal and is in the form of an eccentric spiral with shafts at both ends, and the center of any section of the core is located on the spiral and is offset from the axis 31 of the core by an eccentricity as shown in fig. 5.
The application method of the constant-wall-thickness stator compression molding die comprises the following steps: the rubber melt after the heating passes through the pan feeding mouth 11 of upper and lower mould 1 pours into in the guiding gutter 41 of equal wall thickness stator shell 4, the warp again guiding gutter 41 flows into equal wall thickness stator shell 4 four equipartitions all around in the guiding hole 42 to further pour into equal wall thickness stator shell 4 with the mold core 3 forms in the annular gap 60, the air in the annular gap 60 is discharged from the gas vent 22 of both sides end cover 2, treats it overflows to fill up the rubber melt in the annular gap 60 and have the melt end cover 2 to confirm that the air is discharged completely the back, reuse bolt stops up gas vent 22. And (3) performing stator vulcanization treatment after the injection molding process is completed, then disassembling the equal-wall-thickness stator injection mold after the stator is cooled and formed, and taking out the equal-wall-thickness stator, thus completing the whole process.
The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the technical field of the utility model belongs to the prerequisite of not deviating from the utility model discloses, can also make a plurality of equal substitution or obvious variants, performance or usage are the same moreover, all should regard as belonging to the utility model's scope of protection.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "preferred embodiments," "an example," "a specific example," or "some examples" or the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction. Although the embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made herein without departing from the scope of the claims.
Claims (10)
1. The compression molding die for the screw pump stator with the equal wall thickness is characterized by comprising an upper die, a lower die, an end cover, a die core and a stator shell with the equal wall thickness;
the mold core is arranged in a cavity of the stator shell with the equal wall thickness, the stator shell with the equal wall thickness is arranged in a mold cavity of the upper mold and the lower mold, and the end covers are a pair and are respectively arranged at two ends of the upper mold and the lower mold;
the upper die and the lower die comprise a feeding hole, a positioning hole and upper die and lower die mounting holes, the end cover comprises a positioning hole, an exhaust port, an end cover mounting hole and a mounting step, the die core comprises a die core shaft, a die core shaft flat position and a die core end face, and the stator shell with the equal wall thickness comprises a diversion trench, a diversion hole and a stator shell positioning hole;
and two ends of the mold core shaft respectively penetrate and extend out of the pair of end covers, and an annular gap is formed between the mold core and the stator shell with the equal wall thickness.
2. The coinjection mold of a progressive cavity pump stator according to claim 1, wherein said feed openings are formed in the top surfaces of said upper and lower dies, said at least two locating holes are formed in the top surfaces of said upper and lower dies and are disposed on opposite sides of said feed openings, and said upper and lower die mounting holes are formed in pairs and symmetrically on opposite sides of said upper and lower dies.
3. The compression mold for a progressive cavity pump stator of claim 2, wherein the number of the upper and lower die mounting holes is two or more.
4. The coined mold of claim 1 wherein said feed port is centered lengthwise on the top surface of said upper and lower molds.
5. The transfer mold for a progressive cavity pump stator of claim 1, wherein the mounting step comprises a first step, a second step, and a third step, the first step is engaged with the end surfaces of the upper and lower dies, the second step is engaged with the end surface of the stator housing of equal wall thickness, and the third step is engaged with the end surface of the mold core.
6. The compression mold for a progressive cavity pump stator of any one of claims 1 to 5, wherein the locating hole is a kidney-shaped hole, and the cross-sectional shape of the flat portion of the core shaft matches the outer profile of the locating hole.
7. The compression mold for a screw pump stator with a constant wall thickness according to any one of claims 1 to 5, wherein the upper and lower molds have a one-piece structure or a split structure, and the cross section of the upper and lower molds has a pair of opposite sides parallel to each other.
8. The compression mold for a screw pump stator with equal wall thickness according to any one of claims 1 to 5, wherein the mold core is concentrically arranged with the stator housing with equal wall thickness, and the external thread of the mold core is equidistant from the internal thread of the stator housing with equal wall thickness and has the same spiral angle.
9. The compression mold for a progressive cavity pump stator of claim 8, wherein the annular gap has a diameter of 6mm or more.
10. The compression mold for a screw pump stator with an equal wall thickness as set forth in claim 9, wherein the length of the annular gap in the axial direction of the core is 20mm or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123125763.3U CN216732796U (en) | 2021-12-13 | 2021-12-13 | Transfer mould of screw pump stator with equal wall thickness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123125763.3U CN216732796U (en) | 2021-12-13 | 2021-12-13 | Transfer mould of screw pump stator with equal wall thickness |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216732796U true CN216732796U (en) | 2022-06-14 |
Family
ID=81934372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123125763.3U Active CN216732796U (en) | 2021-12-13 | 2021-12-13 | Transfer mould of screw pump stator with equal wall thickness |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216732796U (en) |
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2021
- 2021-12-13 CN CN202123125763.3U patent/CN216732796U/en active Active
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