Stator shell and injection molding machine

Abstract

The utility model relates to the technical field of fluid conveying equipment, in particular to a stator shell and an injection molding machine, which are applied to manufacturing of a stator of a screw pump, and comprise a shell, two ends of the shell are provided with openings, and the shell is suitable for being matched with an injection molding end of an external injection molding machine for injection molding to manufacture the stator; and the at least one row of exhaust hole group is arranged on the peripheral side of the shell, communicates with the inner cavity of the shell and is suitable for exhausting in the injection molding process. The stator shell solves the problems that an existing stator shell is inconvenient to exhaust, exhaust is usually conducted through a through hole in the bottom of a mold, the exhaust mode easily causes blockage of an exhaust hole, the mold needs to be detached for cleaning, a large amount of time needs to be spent on detaching and cleaning of the mold, and the production efficiency of products is greatly affected.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid conveying equipment, in particular to a stator housing and an injection molding machine. Background Art

[0002] As an important component of a screw pump, the stator is an important parameter that determines whether a screw pump equipment is excellent. At present, the stator accessories of some existing large screw pump companies are quite mature. Because of their long-term technical accumulation, the performance parameters of the stators they produce are very good. But for some small companies, the production of stators is like a technical bottleneck that cannot be broken through. There are various difficult problems to solve during production. For example, due to mold problems, the exhaust is poor during the production of the stator. Not only is the rubber prone to various undesirable phenomena such as explosion, pits, lack of glue, etc., but it will also cause the rubber to block the exhaust holes, making the production of the stator very difficult.

[0003] In the stator manufacturing process, a stator shell is usually injection molded to make a stator. The two ends of the stator shell are clamped by a mold and then connected to the injection molding end of an injection molding machine for injection molding. However, the existing stator shell is not convenient for exhaust. The exhaust method is usually to exhaust through the through hole at the bottom of the mold. This exhaust method easily causes the exhaust hole to be blocked, and the mold needs to be removed for cleaning. The removal and cleaning of the mold takes a lot of time, which greatly affects the production efficiency of the product. Utility Model Content

[0004] The utility model provides a stator housing and an injection molding machine, which solve the technical problem that the existing stator housing is inconvenient to exhaust. The exhaust method thereof is usually to exhaust through a through hole at the bottom of a mold, which easily causes the exhaust hole to be blocked, and the mold needs to be dismantled for cleaning. The dismantling and cleaning of the mold takes a lot of time, which greatly affects the production efficiency of the product.

[0005] In view of this, the first aspect of the present invention provides a stator housing, which is used for manufacturing a stator of a screw pump, comprising:

[0006] A housing, both ends of which are open and suitable for cooperating with the injection end of an external injection molding machine for injection molding to manufacture the stator;

[0007] At least one row of exhaust hole groups is arranged on the peripheral side of the shell and communicated with the inner cavity of the shell, suitable for exhausting air during the injection molding process.

[0008] Optionally, the exhaust hole groups are arranged in multiple rows, and the multiple rows of exhaust hole groups are arranged on the shell at intervals along the axial direction of the shell.

[0009] Optionally, a plurality of rows of exhaust hole groups are evenly spaced apart along the axial direction of the shell.

[0010] Optionally, the exhaust hole groups are arranged in a row, and the exhaust hole groups in one row are located in the middle of the shell.

[0011] Optionally, each row of the exhaust hole groups includes a plurality of exhaust holes, and the plurality of exhaust holes are arranged on the shell at intervals around the axial direction of the shell.

[0012] Optionally, the plurality of exhaust holes are evenly spaced around the axial direction of the housing.

[0013] Optionally, both ends of the shell are provided with positioning grooves around the circumference thereof, which are suitable for being adapted to be connected with the positioning holes of the external mold through the positioning grooves.

[0014] A second aspect of the utility model provides an injection molding machine, comprising an injection molding end and a stator housing cooperatively connected to the injection molding end, wherein the stator housing is the stator housing as described in any one of the first aspects.

[0015] The technical solution of the utility model has the following advantages:

[0016] In the utility model, when injection molding is required, one end of the shell is vertically placed in the positioning hole on the mold for positioning and alignment, and then another mold is placed at the other end of the shell. The two molds are clamped together to clamp the shell, and then connected to an external injection molding machine to perform injection molding in the shell. During the injection molding process, the injection material is injected into the shell, and the air inside the shell is continuously squeezed. After the air is squeezed, it is discharged along the exhaust hole group on the surface of the shell, ensuring that the shell is full of injection material and no air remains, and the injection molding can be completed. The stator shell provided by the utility model is vented by arranging the exhaust hole group on the peripheral side of the shell, without the need for mold venting, reducing the difficulty of mold design and processing, saving mold costs, and improving the exhaust effect at the same time, avoiding the situation where the injection material blocks the exhaust hole of the mold and it takes time to clean the mold, improving the production efficiency of the product, and avoiding the lack of glue and bursting of the stator product caused by poor exhaust during injection molding. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of the structure of a row of exhaust hole groups provided on the shell provided by the utility model;

[0019] Figure 2This is a schematic structural diagram of a shell provided by the utility model in which multiple rows of exhaust hole groups are arranged.

[0020] Description of reference numerals:

[0021] 1. Shell; 2. Exhaust hole; 3. Positioning groove. DETAILED DESCRIPTION

[0022] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0026] Example 1

[0027] See also Figure 1 and Figure 2 The present embodiment provides a stator housing, which is used for manufacturing a stator of a screw pump, and includes: a housing 1, both ends of which are open and suitable for cooperating with an injection molding end of an external injection molding machine for injection molding to manufacture a stator; at least one row of exhaust hole groups, which are arranged on the peripheral side of the housing 1 and are connected to the inner cavity of the housing 1, and are suitable for exhausting air during the injection molding process.

[0028] It should be noted that the injection molding material can be rubber.

[0029] In this embodiment, when injection molding is required, one end of the shell 1 is vertically placed in the positioning hole on the mold for positioning and alignment, and then another mold is placed at the other end of the shell 1. The two molds are clamped together to clamp the shell 1, and then connected to an external injection molding machine to perform injection molding into the shell 1. During the injection molding process, the injection material is injected into the shell 1, and the air inside the shell 1 is continuously squeezed. After the air is squeezed, it is discharged along the exhaust hole group on the surface of the shell 1, ensuring that the shell 1 is full of injection material and no air remains, and the injection molding is completed. The stator shell provided in this embodiment is vented by setting an exhaust hole group on the peripheral side of the shell 1, without the need for mold venting, which reduces the difficulty of mold design and processing, saves mold costs, and improves the exhaust effect, avoiding the situation where the injection material blocks the exhaust holes of the mold and takes time to clean the mold, improving the production efficiency of the product, and avoiding the lack of glue and bursting of the stator product caused by poor exhaust during injection molding.

[0030] Example 2

[0031] As a further improvement to Example 1, Figure 2 As shown, the exhaust hole groups are arranged in multiple rows, and the multiple rows of exhaust hole groups are arranged on the shell 1 at intervals along the axial direction of the shell 1.

[0032] In this embodiment, multiple rows of exhaust hole groups are provided to further improve the exhaust effect of the housing 1, thereby ensuring that the gas can be completely exhausted during injection molding and ensuring product quality.

[0033] Based on the above implementation, in a specific implementation, as Figure 2 As shown, multiple rows of exhaust hole groups are evenly spaced apart along the axial direction of the housing 1 .

[0034] In this embodiment, multiple rows of exhaust hole groups are evenly spaced along the axial direction of the shell 1, which improves the uniformity of exhaust during the exhaust process and ensures that the gas can be completely exhausted during injection molding, thereby improving the quality of the molded product.

[0035] As a convertible implementation method, it can also be, for example Figure 1 As shown, the exhaust hole groups are arranged in a row, and the row of exhaust hole groups is located in the middle position of the shell 1 in the axial direction, thereby improving the exhaust effect.

[0036] Based on the above implementation, in a specific implementation, as Figure 1 and Figure 2 As shown, each row of exhaust hole groups includes a plurality of exhaust holes 2 , and the plurality of exhaust holes 2 are arranged on the housing 1 at intervals around the axial direction of the housing 1 .

[0037] In this embodiment, a plurality of exhaust holes 2 are arranged around the axial direction of the housing 1 to improve the exhaust effect.

[0038] Based on the above implementation, in a specific implementation, as Figure 1 and Figure 2 As shown, a plurality of exhaust holes 2 are evenly spaced around the axial direction of the housing 1 .

[0039] In this embodiment, multiple exhaust holes 2 are evenly spaced around the axial direction of the shell 1 to improve the uniformity of exhaust during the exhaust process, while ensuring that the gas can be completely exhausted during injection molding, thereby improving the quality of the molded product.

[0040] Based on the above implementation, in a specific implementation, as Figure 1 and Figure 2 As shown, both ends of the housing 1 are provided with positioning grooves 3 around the circumference thereof, which are suitable for being adapted to be connected with the positioning holes of the external mold through the positioning grooves 3 .

[0041] It should be noted that the diameter of the outer peripheral wall of the positioning groove 3 is adapted to the diameter of the positioning hole.

[0042] In this embodiment, by providing the positioning groove 3, when the shell body 1 needs to be clamped by a mold, the positioning groove 3 can be snapped into the positioning hole for positioning connection, thereby improving the positioning accuracy and improving the stability after the two molds clamp the shell body 1.

[0043] The specific working principle of the stator housing provided in this embodiment is as follows: when injection molding is required, the two ends of the housing 1 are respectively connected to the positioning holes on the two external molds, and the housing 1 is clamped by the two molds, and then connected to the external injection molding machine, and injection molding is performed in the housing 1. During the injection molding process, the injection molding material is injected into the housing 1, and the air inside the housing 1 is continuously squeezed. After the air is squeezed, it is discharged from the exhaust holes 2 that are regularly distributed in a rectangular shape on the surface of the housing 1, ensuring that the housing 1 is full of injection molding material and no air remains, and waiting for the injection molding to be completed. The stator housing provided in this embodiment is vented by setting an exhaust hole group on the circumferential side of the housing 1, without the need for mold venting, reducing the design and processing difficulty of the mold, saving mold costs, and improving the exhaust effect, avoiding the situation where the injection molding material blocks the exhaust hole 2 of the mold, resulting in the need to spend time cleaning the mold, improving the production efficiency of the product, and avoiding the lack of glue and explosion of the stator product caused by poor exhaust during injection molding; in specific applications, the number of exhaust hole groups can be set to 1, 2, 3 or more, which can be selected according to actual conditions. The problem that the existing stator housing is not easy to vent is solved. The venting method is usually to vent through the through holes at the bottom of the mold. This venting method easily causes the venting holes to be blocked, and the mold needs to be removed for cleaning. The removal and cleaning of the mold takes a lot of time, which greatly affects the production efficiency of the product.

[0044] Example 3

[0045] This embodiment provides an injection molding machine, including an injection molding end and a stator shell cooperatively connected to the injection molding end, and the stator shell adopts the stator shell as described in Example 1 or Example 2.

[0046] It should be noted that the two ends of the stator housing are connected to the injection end of the injection molding machine after being clamped by two molds.

[0047] In this embodiment, the injection molding machine adopts the stator housing of Example 1 or Example 2 to be connected with the injection molding end adapter to manufacture the stator by injection molding. The specific structure of the stator housing is the same as that of Example 1 or Example 2, so that the injection molding machine having the stator housing has at least the same technical effect as the above-mentioned stator housing. The specific principle is the same as that of Example 1 or Example 2, and will not be repeated here.

[0048] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A stator housing, used for manufacturing a stator of a screw pump, characterized in that: include: A housing (1), both ends of which are open and suitable for cooperating with the injection molding end of an external injection molding machine for injection molding to produce a stator; At least one row of exhaust hole groups is arranged on the peripheral side of the shell (1) and is connected to the inner cavity of the shell (1), suitable for exhausting air during the injection molding process.

2. The stator housing according to claim 1, characterized in that: The exhaust hole groups are arranged in a plurality of rows, and the plurality of exhaust hole groups are arranged on the shell (1) at intervals along the axial direction of the shell (1).

3. The stator housing according to claim 2, characterized in that: The plurality of rows of exhaust hole groups are evenly spaced apart along the axial direction of the shell (1).

4. The stator housing according to claim 1, characterized in that: The exhaust hole groups are arranged in a row, and the exhaust hole groups in one row are located in the middle of the shell (1).

5. The stator housing according to any one of claims 1 to 4, characterized in that: Each row of the exhaust hole groups comprises a plurality of exhaust holes (2), and the plurality of exhaust holes (2) are arranged on the shell (1) at intervals around the axial direction of the shell (1).

6. The stator housing according to claim 5, characterized in that A plurality of exhaust holes (2) are evenly spaced around the axial direction of the housing (1).

7. The stator housing according to any one of claims 1 to 4, characterized in that: Both ends of the shell (1) are provided with positioning grooves (3) around the circumference thereof, and are suitable for being matched and connected with the positioning holes of an external mold through the positioning grooves (3).

8. An injection molding machine, characterized in that: It comprises an injection molding end and a stator shell which is cooperatively connected with the injection molding end, and the stator shell adopts the stator shell as claimed in any one of claims 1 to 7.

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