Vacuum press pump and mold for manufacturing a pump cover

Abstract

Disclosed are a vacuum pressing pump and a mold for manufacturing a pump cover. The vacuum pressing pump comprises a pressing head, an outer cover, a pump cover and a pump base, wherein the pump cover and the pump base are installed together, the pump cover is provided with a first clasp ring, and the outer cover is fixedly matched with the pump cover through the first clasp ring. The pump base is provided with an outer sleeve, a container matching portion is arranged on the outer side of the outer sleeve, and an annular groove is formed between the container matching portion and the outer sleeve. The lower part of the pump cover is provided with an inner plug, the inner plug can be inserted into the annular groove, so that the pump cover and the pump base are fixedly matched, the first clasp ring is formed on the outer surface of the pump cover, and the pump cover is formed to have the maximum diameter at the first clasp ring. The vacuum pressing pump with the structure can overcome the problems that the matching force between the pump cover and the outer cover is too tight or too loose, and can be conveniently manufactured. The disclosed mold is used for manufacturing the pump cover in the vacuum pressing pump.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of product packaging, and in particular to a product dispenser mounted on a product container for dispensing a liquid or semi-liquid product, and more particularly to a vacuum pump. BACKGROUND

[0002] Pump dispensers are widely used in fields such as daily chemicals, medicines, food, etc. for dispensing a liquid or semi-liquid product from a container holding the product. In the field of daily chemicals for example, some products contain ingredients such as vitamin A, which can yellow after long-term exposure to air. In addition, some products are relatively viscous, and can leave a relatively large amount of product in the container after use, which can not be completely cleaned.

[0003] In view of the above, a vacuum pump is considered to be used. Compared with a conventional pump, a vacuum pump has a greater suction force, and can greatly reduce the amount of product left in the container for relatively viscous products. Furthermore, the use of a vacuum pump eliminates the need to replenish air into the product container, thereby avoiding the exposure of the product to air and preventing or at least delaying the deterioration of the product.

[0004] However, the vacuum pump currently used has some problems. Figures 13-15 A currently available vacuum pump 10 mounted on a container 20 is shown. The pump 10 includes a pump cover 11 and a base 12, and an outer cover 13 is fixedly coupled to the pump cover 11. Among them, the pump cover 11 is one of the difficulties in manufacturing. Generally speaking, in the process of manufacturing the pump cover 11, it is necessary to consider how to control the coupling force between the outer cover 13 and the pump cover 11. If the coupling force between the pump cover 11 and the outer cover 13 is relatively large, a user needs to use a relatively large force to open the outer cover 13 to start using, and if the coupling force is too small, the outer cover 13 is easily separated from the pump cover 11 in situations such as transportation. However, for the pump cover 11, since it needs to be coupled to the container, a relatively large container coupling portion 15 needs to be provided at the lower part thereof, and a clasp 14 for coupling with the outer cover is made at the middle or upper part of the pump cover 11, as shown in FIG. 1. In this way, during the molding of the pump cover 11, part of the clasp 14 is made into a strong demolding structure, which causes the clasp to be easily deformed and the size thereof to be difficult to control. Figure 13

[0005] In addition, the structure of the existing vacuum pump is complex, so that the manufacturing mold and assembly process thereof are complex, and the proportion of defective products in the manufacturing process is relatively high, thereby causing the manufacturing cost of the vacuum pump to be significantly higher than that of a conventional pump.

[0006] Therefore, there is a need in the art to further improve the structure of the vacuum pump to simplify the structure of the vacuum pump and make it easy to assemble.​ SUMMARY

[0007] The present application is made to solve the problems existing in the prior art. The object of the present application is to provide a vacuum press pump which is simple in structure, easy to mold, and in which the size of the part of the pump cover for cooperating with the outer cover can be accurately controlled to solve the problems of easy loosening or too tight of the outer cover, difficult demolding during product manufacturing, etc.

[0008] The present application provides a vacuum press pump which comprises a press head, an outer cover, a pump cover and a pump base, wherein the pump cover and the pump base are installed together, the pump cover is formed with a first snap ring, and the outer cover can be fixedly fitted to the pump cover through the first snap ring. The pump base has an outer sleeve, a container fitting part is arranged on the outer side of the outer sleeve, and an annular groove is formed between the container fitting part and the outer sleeve. The lower part of the pump cover is formed with an inner plug which can be inserted into the annular groove, so that the pump cover and the pump base are fixedly fitted, and the first snap ring is formed on the outer surface of the pump cover, and the pump cover is formed to have the largest diameter at the first snap ring.

[0009] Through the above structure, the container fitting part for cooperating with the container is arranged on the pump base, so that the pump cover can be designed to have the largest diameter at the first snap ring. In this way, when the pump cover is molded, at least at the first snap ring, it will not experience strong demolding, so that the size at the first snap ring can be more accurately controlled, and the problems of too tight or too loose cooperation between the pump cover and the outer cover are overcome. Moreover, the container fitting part is arranged on the pump base, and the pump base and the pump cover are cooperated together through the structure of the inner plug and the annular groove, so that the pump base can be made to have a larger size at the lower part and a smaller size at the upper part, and the pump cover is made to have the largest diameter at the first snap ring, so that both of the two parts can be easily molded, the manufacturing efficiency is improved, and the mold for manufacturing, especially the mold for manufacturing the pump cover, is simple in structure.

[0010] Preferably, the pump cover is formed to have a diameter decreasing from the first snap ring to the two sides of the first snap ring. In this way, during the molding of the pump cover, substantially all parts of the pump cover will not experience strong demolding, so that it is simple to mold, and the size and shape of the finished pump cover can be accurately controlled.

[0011] Preferably, an inner ring is formed in the pump cover. The inner ring corresponds to the ejection pin in the pump cover mold, and the ejection pin can push against the inner ring during demolding, so as to facilitate the demolding of the pump cover.

[0012] Preferably, a second snap ring is formed on the outer cover, and the second snap ring can cooperate with the first snap ring to realize the fixed fitting of the outer cover and the pump cover. Alternatively, other structures can be arranged on the outer cover to realize the cooperation of the outer cover and the pump cover, such as a groove on the outer cover which can match the shape of the first snap ring.

[0013] Preferably, the vacuum pressing pump further comprises a piston rod connected to the pressing head, a piston mounted on the piston rod, a cylinder mounted on the pump base and into which the piston extends, and a return spring supported between the pressing head and the pump base.

[0014] Preferably, a lower one-way valve is integrally formed in the lower portion of the cylinder, a lower valve seat is formed in the bottom of the pump base, and the lower one-way valve cooperates with the lower valve seat when the cylinder is fixedly mounted on the pump base. Similarly, an upper one-way valve is integrally formed in the piston rod, an upper valve seat is formed in the top of the piston, and the upper one-way valve cooperates with the upper valve seat when the piston is mounted on the piston rod. The integrally formed upper and lower one-way valves help reduce the number of components of the vacuum pressing pump and simplify the structure.

[0015] Preferably, a slope is formed on the inner side of the top of the cylinder. The slope functions to guide the piston when the piston is inserted into the cylinder, facilitating installation of the vacuum pressing pump.

[0016] The present application also proposes a pump cover mold for manufacturing the pump cover of the vacuum pressing pump, comprising a fixed mold comprising a fixed mold cavity and a fixed mold insert inserted into the inner cavity of the fixed mold cavity, and a movable mold comprising a movable mold cavity, a movable mold insert, and a movable mold core inserted into the inner cavity of the movable mold cavity. When the fixed mold cavity and the movable mold cavity are closed, a parting line is defined between the fixed mold cavity and the movable mold cavity, and the position of the parting line corresponds to the first snap ring of the pump cover.

[0017] The pump cover mold corresponds to the structure of the pump cover of the vacuum pressing pump of the present application, has a simple structure, and uses the first snap ring of the pump cover as the parting line, so that the mold can be easily demolded after molding, and at least the first snap ring does not experience strong demolding.

[0018] Further, the movable mold further comprises an ejection sleeve inserted between the movable mold insert and the movable mold core, and the position of the ejection sleeve corresponds to the inner ring, so that the ejection sleeve can be abutted against the lower end of the inner ring when demolding. The ejection sleeve can help demolding of the pump cover after molding. BRIEF DESCRIPTION OF DRAWINGS

[0019] The preferred embodiments of the present application are shown in the drawings, and the features and advantages of the present application can be more apparent in conjunction with the drawings. Among them:

[0020] Figure 1 A schematic cross-sectional view of a container installed with the vacuum pressing pump of the present application is shown.

[0021] Figure 2 A cross-sectional view of the vacuum pressing pump of the present application is shown, with the outer cover removed.

[0022] Figure 3 a sectional view of a pressing head of a vacuum pressing pump according to the application is shown. Figure 1

[0023] Figure 4a a sectional view of a piston rod of a vacuum pressing pump according to the application is shown. Figure 1

[0024] Figure 4b a top view of a piston rod is shown.

[0025] Figure 5 a sectional view of a piston of a vacuum pressing pump according to the application is shown. Figure 1

[0026] Figure 6 a sectional view of a pump cover of a vacuum pressing pump according to the application is shown. Figure 1

[0027] a sectional view of a pump base of a vacuum pressing pump according to the application is shown. Figure 7 Figure 1

[0028] Figure 8 a sectional view of a cylinder of a vacuum pressing pump according to the application is shown. Figure 1

[0029] Figure 9 a sectional view of an outer cover of a vacuum pressing pump according to the application is shown. Figure 1

[0030] Figure 10 a mold for manufacturing a pump cover of a vacuum pressing pump according to the application is shown. Figure 1

[0031] Figure 11 a partial enlarged view of part A in Fig. 8 is shown. Figure 10

[0032] a sectional view of a pump cover manufactured with the mold according to the application is shown, wherein the parting line is indicated schematically. Figure 12 Figure 10

[0033] Figure 13 a sectional view of a container with an installed existing vacuum pressing pump is shown.

[0034] Figure 14 a sectional view of a pump cover and a bottom support of a vacuum pressing pump according to the application installed together is shown. Figure 13

[0035] Figure 15 a sectional view of a pump cover of a vacuum pressing pump according to the application is shown. Figure 13 (Explanation of symbols)

[0036] ​​​​​​​​​​​​

[0037] 10 vacuum press pump (prior art); 11 pump cover (prior art); 12 base (prior art); 13 outer cover (prior art); 14 snap ring (prior art); 15 container fitting portion (prior art); 20 container;

[0038] 100 vacuum press pump; 110 press head; 1111 outer sleeve; 1112 inner sleeve; 111 large diameter portion; 112 small diameter portion; 113 piston rod; 114 upper check valve; 115 piston; 116 upper valve seat; 120 outer cover; 121 second snap ring; 130 pump cover; 131 first snap ring; 132 inner plug; 133 inner ring; 134 pump cover top hole; 140 pump base; 141 cylinder; 142 lower check valve; 143 lower valve seat; 144 inner sleeve; 145 outer sleeve; 146 container fitting portion; 147 annular groove; 148 bevel; 150 return spring;

[0039] 200 pump cover mold; 210 fixed mold; 211 fixed mold cavity; 212 fixed mold insert; 220 movable mold; 221 movable mold cavity; 222 movable mold insert; 223 ejector sleeve; 224 movable mold core; 230 parting line. DETAILED DESCRIPTION

[0040] The specific embodiments of the present application will be described in detail below with reference to the drawings. It should be noted that the drawings shown in the drawings are only the preferred embodiments of the present application, and do not constitute a limitation on the scope of the present application. Those skilled in the art can make various obvious modifications, variations, equivalent replacements to the present application on the basis of the embodiments shown in the drawings, and the technical features described below in different embodiments can be combined with each other arbitrarily without contradiction, which all fall within the protection scope of the present application.

[0041] Figure 1 A schematic cross-sectional view of a container 20 mounted with the vacuum press pump 100 of the present application is shown. The vacuum press pump 100 includes a press head 110, a pump cover 130 and a pump base 140, and the pump cover 130 is coupled with the pump base 140 together. A cylinder 141 is accommodated in the space defined by the pump cover 130 and the pump base 140 together, and specifically, the cylinder 141 is connected at the bottom of the pump base 140.

[0042] The pressing head 110 is movably inserted into the pump cover 130. A piston rod 113 is connected to the pressing head 110, and a piston 115 is connected to the lower end of the piston rod 113. The piston 115 extends into the cylinder 141. The pressing head 110 can drive the piston rod 113 and the piston 115 to move together in the vertical direction relative to the pump cover 130, the pump base 140, and the cylinder 141. Therefore, the pressing head 110, the piston rod 113, and the piston 115 can be referred to as the moving parts of the vacuum pressing pump 100, and the pump cover 130, the pump base 140, and the cylinder 141 can be referred to as the fixed parts.

[0043] The vacuum pump 100 also includes a return spring 150, the upper end of which is supported on the movable part of the vacuum pump 100, for example, on the pressing head 110, and the lower end of which is supported on the fixed part of the vacuum pump 100, for example, on the top of the cylinder 141.

[0044] Of course, the upper end of the return spring 150 can also be supported at other locations on the movable part, such as on the piston rod 113. Similarly, the lower end of the return spring 150 can also be supported at other locations on the fixed part, such as on the bottom of the pump seat 140, and so on.

[0045] like Figure 1 As shown, the vacuum pump 100 also includes an outer cover 120, which is snapped into the pump cover 130 to cover the pressing head 110, pump cover 130, pump base 140 and other components and protect them from external environmental pollution.

[0046] The following will combine Figures 3-9 This section describes in detail the specific structure of each component of the vacuum pump 100.

[0047] Figure 3 An exemplary cross-sectional view of the press head 110 is shown. As shown, the outer sleeve 1111 of the press head 110 is preferably shaped as a variable diameter section, having a large diameter portion 111 at the lower part and a small diameter portion 112 at the upper part, with a stepped portion formed between the large diameter portion 111 and the small diameter portion 112. The large diameter portion 111 can fit into the pump cover 130, and it can limit the range of movement of the press head 110 relative to the pump cover 130 in the vertical direction, which will be described in more detail below.

[0048] An inner sleeve 1112 is formed inside the outer sleeve 1111, and the piston rod 113 is connected to the inner sleeve 1112, for example, by a snap fit through a protruding ring-groove structure. Specifically, a protruding ring can be formed on the outer surface of the piston rod 113 to extend circumferentially along the piston rod 113, and an annular groove matching the shape of the protruding ring can be formed on the inner surface of the inner sleeve 1112. The protruding ring can be snap-fitted in the annular groove, thereby achieving the connection between the piston rod 113 and the inner sleeve 1112. Alternatively, the positions of the protruding ring and the groove can be interchanged, i.e., the annular groove can be formed on the outer surface of the piston rod 113, and the protruding ring can be formed on the inner surface of the inner sleeve 1112. Of course, the connection between the piston rod 113 and the inner sleeve 1112 can also be achieved through a structure such as a screw thread. An upper one-way valve 114 is formed in the piston rod 113 Figure 4a , and an upper valve seat 116 is formed in the upper portion of the piston 115 Figure 5 , with which the upper one-way valve 114 cooperates. The upper one-way valve 114 is preferably integrally formed inside the piston rod 113. In this way, the function of the one-way valve is achieved by the structure in the piston rod 113 and the piston 115, which helps to reduce the number of components of the vacuum pressing pump 100, simplify the structure, and the structure is also easy to mold, thereby improving the production efficiency of the vacuum pressing pump 100.

[0049] Figure 6 An exemplary structural cross-sectional view of the pump cover 130 is shown, in which a first snap ring 131 is formed on the outer surface of the pump cover 130, which is used to cooperate with the second snap ring 121 Figure 9 of the outer cover 120 to achieve the fixed fit between the outer cover 120 and the pump cover 130.

[0050] Alternatively, other structures can also be provided on the outer cover 120 to cooperate with the first snap ring 131, such as an annular groove matching the shape of the first snap ring 131, etc.

[0051] An inner ring 133 is formed inside the pump cover 130, and during the molding of the pump cover 130, the ejector pin 223 (see Figure 10 ) of the grinding tool can be struck at the lower end of the inner ring 133 of the pump cover 130 to complete the demolding, which will be described in more detail below.

[0052] The large-diameter portion 111 of the lower portion of the outer sleeve 1111 of the pressing head 110 is fitted in the pump cover top hole 134 of the pump cover 130, and the outer diameter of the large-diameter portion 111 can be set to be larger than the inner diameter of the pump cover top hole 134, so that when the outer sleeve 1111 of the pressing head 110 is inserted into the pump cover 130 through the pump cover top hole 134, the step portion between the large-diameter portion 111 and the small-diameter portion 112 is stopped at the pump cover top hole 134, thereby limiting the upward movement of the pressing head 110 relative to the pump cover 130.

[0053] Figure 7 and 8 A schematic cross-sectional view of the pump base 140 and the cylinder 141 is shown. The pump base 140 is formed with an inner sleeve 144 and an outer sleeve 145 extending around the outer periphery of the inner sleeve 144, and a lower valve seat 143 is formed inside the inner sleeve 144. The cylinder 141 is preferably mounted in the pump base 140, for example, as shown in the figure, fixedly connected together with the inner sleeve 144. The connection between the cylinder 141 and the inner sleeve 144 can be achieved by a snap ring-groove structure. For example, as can be seen from Figure 7 , a groove structure is formed on the inner surface of the inner sleeve 144, and a snap ring structure matching the groove structure is formed on the outer surface of the cylinder 141. By the cooperation between the snap ring and the groove, the connection between the cylinder 141 and the inner sleeve 144 is achieved. Alternatively, the positions of the snap ring and the groove can also be interchanged, i.e., the groove structure is formed on the outer surface of the cylinder 141, and the snap ring structure is formed on the inner surface of the inner sleeve 144. A lower one-way valve 142 is formed on the cylinder 141, and when the cylinder 141 is fixed into the pump base 140, the lower one-way valve 142 of the cylinder 141 cooperates with the lower valve seat 143 of the pump base 140. The lower one-way valve 142 is preferably integrally formed on the lower portion of the cylinder 141. In this way, the number of components can be further reduced, the overall structure of the vacuum pressing pump 100 is simplified, and the manufacturing is facilitated, and the manufacturing efficiency of the vacuum pressing pump 100 is improved.

[0054] The inner diameter of the cylinder 141 is arranged to be able to receive the piston 115, and a sealing cooperation is formed between the outer periphery of the piston 115 and the inner surface of the cylinder 141. Preferably, as shown in Figure 8 , a bevel 148 is formed on the inner side of the top portion of the cylinder 141, which is used to guide the piston 115, so as to facilitate the insertion of the piston 115 into the cylinder 141.

[0055] A container cooperation portion 146 is formed on the outer side of the outer sleeve 145, which is configured to be able to cooperatively connected with the bottle mouth of the container 20, for example, by a snap ring-slot structure to achieve snap cooperation, by a threaded structure, etc. An annular groove 147 is formed between the container cooperation portion 146 and the outer sleeve 145.

[0056] Corresponding to the annular groove 147, as Figure 6As shown, an inner plug 132 is formed at the lower part of the pump cover 130. The inner plug 132 is configured to be inserted into the annular groove 147, thereby achieving the connection between the pump cover 130 and the pump seat 140. Preferably, the thickness of the inner plug 132 can be set to be slightly larger than the width of the annular groove 147, thereby forming an interference fit between the inner plug 132 and the annular groove 147, improving the connection strength between the pump cover 130 and the pump seat 140. Alternatively, the inner plug 132 can also be fixed in the annular groove 147 by means of threads, snap-fit ​​structures, etc.

[0057] Thus, combined Figure 6 and 7 As can be seen in the structure of this application, a container mating portion 146 for mating with the container 20 is formed on the pump base 140, and an inner plug 132 for mating with the pump base 140 is formed at the lower part of the pump cover 130. This allows the pump cover 130 to be shaped such that the position of its first retaining ring 131 is its largest diameter. Thus, with the first retaining ring 131 as the parting line of the pump cover 130, demolding can be performed from both sides of the first retaining ring 131 during molding, thereby preventing strong demolding at least at the first retaining ring 131. Preferably, the upper and lower portions of the first retaining ring 131 can be formed such that their dimensions decrease along the direction away from the first retaining ring 131.

[0058] Figure 10 A schematic diagram of a pump cover mold 200 for molding the pump cover 130 is shown. The pump cover mold 200 and the method for molding the pump cover 130 will be described below.

[0059] like Figure 10 As shown, the pump cover mold 200 includes a fixed mold 210 and a movable mold 220. The fixed mold 210 includes a fixed mold cavity 211 and a fixed mold insert 212, with the insert 212 inserted into the cavity of the fixed mold cavity 211. The movable mold 220 includes a movable mold cavity 221, a movable mold insert 222, and a movable mold core 224, with the core 224 inserted into the cavity of the movable mold cavity 221 and in contact with the insert 212. A gap is formed between the core 224 and the cavity 221, and the insert 222 is inserted into the gap. Furthermore, an ejector sleeve 223 is inserted between the moving mold insert 222 and the moving mold core 224. The position of the ejector sleeve 223 corresponds to the inner ring 133 of the pump cover 130, so that the ejector sleeve 223 can abut the lower end of the inner ring 133 during demolding to aid demolding. After the fixed mold cavity 211 and the moving mold cavity 221 are closed, a parting line 230 is defined between them. The position of the parting line 230 corresponds to the first retaining ring 131 on the pump cover 130, such as... Figure 12 As marked in the text.

[0060] After the pump cover 130 is molded, the fixed mold 210 is first separated from the movable mold 220 at the parting line 230, and the movable mold 220 is demolded from the fixed mold 210 with the molded pump cover 130. Then, the ejector sleeve 223 is used to push against the lower end of the inner ring 133 of the pump cover 130, so that the pump cover 130 is demolded from the movable mold 220. The process of using the ejector sleeve 223 to eject the pump cover 130 from the movable mold 220 can be combined with the process of using the ejector sleeve 223 to eject the pump cover 130 from the movable mold 220. Figure 11 For a more convenient understanding.

[0061] In combination Figures 10-12 It can be seen that for the pump cover 130 of the structure of the present application, the structure of the pump cover mold 200 used to mold the pump cover 130 is not complex, and during the molding process, any part of the pump cover 130 does not undergo a strong demolding process, which avoids or greatly reduces the risk of deformation of the pump cover 130 during demolding, thereby helping to more accurately control the size of the pump cover 130, especially the size at the first snap ring 131, so as to ensure that it can form a snap fit with the second snap ring 121 of the outer cover 120 with a suitable bonding force.

[0062] The above describes in detail the various embodiments and variant structures of the vacuum pressing pump of the present application. Based on these embodiments and variant structures, those skilled in the art can further make various obvious modifications and variations to the structure of the product storage and distribution device of the present application, which are also within the scope of the present application.

Claims

1. A vacuum press pump, the vacuum press pump comprising a press head, an outer cover, a pump cover, and a pump base, wherein, The pump cover is mounted together with the pump base, and a first retaining ring is formed on the pump cover. The outer cover can be fixedly fitted to the pump cover by the first retaining ring. The characteristic of this design is... The pump base has an outer sleeve, and a container mating part is provided on the outer side of the outer sleeve. An annular groove is formed between the container mating part and the outer sleeve. The lower part of the pump cover has an inner plug that can be inserted into the annular groove, thereby fixing the pump cover to the pump seat. The first retaining ring is formed on the outer surface of the pump cover, and the pump cover is formed with the largest diameter at the first retaining ring. The pump cover is formed such that its diameter decreases from the first retaining ring towards both sides of the first retaining ring.

2. The vacuum pump as described in claim 1, characterized in that, An inner ring is formed in the pump cover.

3. The vacuum pump as described in claim 1, characterized in that, A second retaining ring is formed on the outer cover, which can cooperate with the first retaining ring to achieve a fixed fit between the outer cover and the pump cover.

4. The vacuum pump as described in claim 1, characterized in that, The vacuum pump also includes: Piston rod, which is connected to the pressing head; Piston, which is mounted on the piston rod; A cylinder, the cylinder being mounted on the pump base, and the piston extending into the cylinder; and A return spring is provided, which is supported between the pressing head and the pump seat.

5. The vacuum pump as described in claim 4, characterized in that, A lower check valve is integrally formed at the lower part of the cylinder, and a lower valve seat is formed at the bottom of the pump base. When the cylinder is fixedly mounted on the pump base, the lower check valve cooperates with the lower valve seat; and / or An upper one-way valve is integrally formed inside the piston rod, and an upper valve seat is formed on the top of the piston. When the piston is mounted on the piston rod, the upper one-way valve cooperates with the upper valve seat.

6. The vacuum pump as described in claim 4, characterized in that, An inclined surface is formed on the inner side of the top of the cylinder.

7. A pump cover mold for manufacturing a pump cover in a vacuum pump as described in claim 1, the pump cover mold comprising: A fixed mold, the fixed mold comprising a fixed mold cavity and a fixed mold insert, the fixed mold insert being inserted into the inner cavity of the fixed mold cavity; And a moving mold, the moving mold comprising a moving mold cavity, a moving mold insert, and a moving mold core, the moving mold core being inserted into the inner cavity of the moving mold cavity, characterized in that, When the fixed mold cavity and the moving mold cavity are closed, a parting line is defined between the fixed mold cavity and the moving mold cavity, and the position of the parting line corresponds to the first retaining ring of the pump cover.

8. The pump cover mold as described in claim 7, characterized in that, The pump cover includes an inner ring, and the moving mold also includes an ejector sleeve. The ejector sleeve is inserted between the moving mold insert and the moving mold core, and the position of the ejector sleeve corresponds to the inner ring, so that the ejector sleeve can push against the lower end of the inner ring during demolding.

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