Plastic pump pressing head injection molding mold

Abstract

This application relates to a plastic pump press head injection molding die, including a base, a lower mold on the top of the base, a plurality of evenly arranged injection cavities on the top of the lower mold, an injection groove at the middle position of the injection cavities on the top of the lower mold, an upper mold on the top of the lower mold, and an injection port on the top of the upper mold. This invention uses a driven air pump to allow gas to pass through an air pipe into a first vent hole and a longitudinal vent groove, and then through the longitudinal vent groove into the movable cavity at the bottom of the plurality of injection cavities. This causes the movable block to compress the spring and drive the ejector rod to penetrate into the injection cavity and lift the molded product. At this time, the gas enters the injection cavity through a channel connecting the movable cavity and the injection cavity, blowing the molded product out of the injection cavity, thus making demolding more convenient.

Description

Technical Field

[0001] This application relates to the field of injection mold technology for pump press heads, and in particular to an injection mold for a plastic pump press head. Background Technology

[0002] In the personal care products industry, plastic pump dispensers are a key component for controlling product dispensing, and their quality directly affects user experience and product sealing. Injection molding dies are the core factor determining the production quality, efficiency, and cost of plastic pump dispensers.

[0003] Some existing injection molding dies use simple ejector pins or push plates for demolding molded products. However, for plastic pump press heads with complex structures, it is impossible to ensure that the force is evenly distributed in all parts. When the ejector pins are ejected, the force is easily too large in some areas, causing the press head to deform and reducing the yield rate. Utility Model Content

[0004] To address the problems mentioned in the background art, this application provides an injection molding die for a plastic pump press head.

[0005] The injection molding die for a plastic pump press head provided in this application adopts the following technical solution:

[0006] A plastic pump press head injection molding die includes a base, a lower mold on the top of the base, a plurality of evenly arranged injection cavities on the top of the lower mold, an injection groove at the middle position of the injection cavities on the top of the lower mold, lifting mechanisms for demolding the molded parts inside the injection cavities on both sides of the lower mold, an upper mold on the top of the lower mold, an injection port on the top of the upper mold, and symmetrical positioning posts at both ends of the top of the lower mold, the positioning posts being adapted to positioning holes opened at the bottom of the upper mold.

[0007] Preferably, the lifting mechanism includes two symmetrical air pipes installed on the side walls at both ends of the lower mold, and one end of the two air pipes is connected to an air pump located at the bottom of the lower mold in the middle of the base.

[0008] Preferably, the other end of the air pipe is connected to the first vent hole opened on the inner wall of both ends of the lower mold, and the first vent hole is also connected to the longitudinal vent groove provided inside the lower mold.

[0009] Preferably, the longitudinal ventilation grooves are connected to the movable cavity at the bottom of the injection cavity at the top of the lower mold, and the movable cavity is provided with a movable block inside.

[0010] Preferably, a push rod is provided on the top of the movable block, and a spring is also provided on the top of the movable block. The other end of the spring is connected to the top surface of the movable cavity, and the other end of the push rod is located in the through groove connecting the injection cavity and the movable cavity.

[0011] Preferably, symmetrical auxiliary components are provided on both sides of the lower mold. The auxiliary components include two symmetrical fixing frames that are fixedly connected to the base, and an electric telescopic rod is fixedly installed on one side of each of the two fixing frames.

[0012] Preferably, one end of the electric telescopic rod is connected to a fixing plate, one side of the fixing plate is in contact with the side walls of both ends of the lower mold, and one side of the fixing plate is also provided with an auxiliary rod corresponding to the top injection cavity of the lower mold, one end of the auxiliary rod is inserted into the injection cavity.

[0013] In summary, this application includes the following beneficial technical effects:

[0014] 1. This utility model is equipped with a lifting mechanism. By driving an air pump, gas is introduced into the first vent through an air pipe, then into the longitudinal vent groove, and finally into the bottom movable cavity of multiple injection cavities. This causes the movable block to compress the spring and drive the ejector rod to penetrate into the injection cavity and lift the molded part. At this time, the gas will enter the injection cavity through the through groove connecting the movable cavity and the injection cavity, and blow the molded part out of the injection cavity, so that each part can be evenly stressed, making demolding more convenient.

[0015] 2. This utility model is equipped with an auxiliary component. By driving an electric telescopic rod, a fixed plate connected to one end is moved to the contact point between the two side walls of the lower mold, so as to prevent leakage from the injection cavity during the injection molding process. At the same time, an auxiliary rod set on one side of the fixed plate is inserted into the injection cavity. The auxiliary rod can maintain a vacuum at the liquid outlet of the press head during the pressing head molding process, thereby reducing the defect rate of the press head during the injection molding process. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a plastic pump press head injection molding die in an embodiment of this application;

[0017] Figure 2 This is a schematic diagram of the disassembled structure of the lower mold and the upper mold in an embodiment of this application;

[0018] Figure 3 This is a cross-sectional view of the internal structure of the lower mold in an embodiment of this application;

[0019] Figure 4 This is an embodiment of the present application. Figure 3 Enlarged schematic diagram of the structure at point A;

[0020] Figure 5 This is a schematic diagram of the auxiliary components on both sides of the lower mold in this embodiment of the application.

[0021] Explanation of reference numerals in the attached drawings: 1. Base; 2. Lower mold; 3. Injection cavity; 4. Upper mold; 5. Positioning pin; 6. Air pipe; 7. Air pump; 8. First vent hole; 9. Longitudinal vent groove; 10. Movable block; 11. Push rod; 12. Spring; 13. Fixing frame; 14. Electric telescopic rod; 15. Fixing plate; 16. Auxiliary rod. Detailed Implementation

[0022] The following is in conjunction with the appendix Figure 1 —5 provides further detailed description of this application.

[0023] This application discloses an injection molding die for a plastic pump press head, including a base 1, a lower mold 2 on the top of the base 1, a plurality of uniformly arranged injection cavities 3 on the top of the lower mold 2, an injection groove at the middle position of the injection cavities 3 on the top of the lower mold 2, lifting mechanisms for demolding the molded parts inside the injection cavities 3 on both sides of the lower mold 2, an upper mold 4 on the top of the lower mold 2, an injection port on the top of the upper mold 4, and symmetrical positioning posts 5 at both ends of the top of the lower mold 2, the positioning posts 5 being adapted to the positioning holes opened at the bottom of the upper mold 4.

[0024] refer to Figure 3 and Figure 4 The lifting mechanism includes two symmetrical air pipes 6 installed on the side walls at both ends of the lower mold 2. One end of each air pipe 6 is connected to an air pump 7 located at the bottom of the lower mold 2 in the middle of the base 1. The other end of each air pipe 6 is connected to a first vent hole 8 opened on the inner wall at both ends of the lower mold 2. The first vent hole 8 is also connected to a longitudinal vent groove 9 provided inside the lower mold 2. The longitudinal vent groove 9 is connected to a movable cavity at the bottom of the injection cavity 3 at the top of the lower mold 2. A movable block 10 is provided inside the movable cavity. A push rod 11 is provided on the top of the movable block 10. A spring 12 is also provided on the top of the movable block 10. The other end of the spring 12 is connected to the top surface inside the movable cavity. The other end of the push rod 11... One end is located in the through groove connecting the injection cavity 3 and the movable cavity. More specifically, when demolding the molded part inside the injection cavity 3, the air pump 7 is driven to allow gas to enter the first vent hole 8 through the air pipe 6, and then through the first vent hole 8 into the longitudinal vent groove 9, and then through the longitudinal vent groove 9 into the movable cavity at the bottom of multiple injection cavities 3. The gas inside the movable cavity drives the movable block 10 to move upward, causing the movable block 10 to squeeze the spring 12, and driving the ejector rod 11 to penetrate into the injection cavity 3 to lift the molded part. At this time, the gas will enter the injection cavity 3 through the through groove connecting the movable cavity and the injection cavity 3, and blow the molded part out of the injection cavity 3, thus making demolding more convenient.

[0025] refer to Figure 1 and Figure 5 The lower mold 2 is also provided with symmetrical auxiliary components on both sides. The auxiliary components include two symmetrical fixing frames 13 fixedly connected to the base 1. An electric telescopic rod 14 is fixedly installed on one side of the two fixing frames 13. One end of the electric telescopic rod 14 is connected to a fixing plate 15. One side of the fixing plate 15 is in contact with the side walls of both ends of the lower mold 2. An auxiliary rod 16 corresponding to the top injection cavity 3 of the lower mold 2 is also provided on one side of the fixing plate 15. One end of the auxiliary rod 16 is inserted into the injection cavity 3. More specifically, when injection molding is performed, by driving the electric telescopic rod 14 fixedly installed on one side of the two fixing frames 13, the fixing plate 15 connected at one end is moved to the position where the lower mold 2 and the side walls of the upper mold 4 are in contact. This prevents leakage from the injection port during the injection molding process. At the same time, the auxiliary rod 16 provided on one side of the fixing plate 15 is inserted into the injection cavity 3. The auxiliary rod 16 can maintain a vacuum at the liquid outlet of the press head during the pressing head molding process, thereby reducing the defect rate of the press head during the injection molding process.

[0026] The implementation principle of the injection molding die for a plastic pump press head in this application embodiment is as follows: During use, the electric telescopic rods 14 mounted on the two fixed frames 13 are driven to move the fixed plate 15 to fit against the side walls of the lower mold 2. Simultaneously, the auxiliary rod 16 on one side is inserted into the injection cavity 3. Then, the upper mold 4 is combined with the lower mold 2, and injection is performed through the injection port at the top of the upper mold 4. After injection molding, when demolding the press head formed inside the injection cavity 3, the air pump 7 is driven to allow gas to enter through the air pipe 6 into the first... The gas enters the longitudinal ventilation groove 9 through the first ventilation hole 8, and then enters the bottom movable cavity of multiple injection cavities 3 through the longitudinal ventilation groove 9. The gas moves the movable block 10 upward inside the movable cavity, causing the movable block 10 to squeeze the spring 12 and drive the ejector rod 11 to enter the injection cavity 3 to lift the molded product. At this time, the gas will enter the injection cavity 3 through the through groove connecting the movable cavity and the injection cavity 3, and blow the molded product out of the injection cavity 3, so that each part can be evenly stressed, making demolding more convenient.

[0027] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A plastic pump press head injection molding die, comprising a base (1), characterized in that: The base (1) is provided with a lower mold (2) on its top. The lower mold (2) is provided with a plurality of uniformly arranged injection cavities (3) on its top. The lower mold (2) is provided with an injection groove at the middle position of the injection cavity (3) on its top. The lower mold (2) is provided with a lifting mechanism on both sides for demolding the molded product inside the injection cavity (3). The lower mold (2) is also provided with an upper mold (4) on its top. The upper mold (4) is provided with an injection port on its top. The lower mold (2) is provided with symmetrical positioning posts (5) at both ends of its top. The positioning posts (5) are adapted to the positioning holes opened at the bottom of the upper mold (4).

2. The injection molding die for a plastic pump press head according to claim 1, characterized in that: The lifting mechanism includes two symmetrical air pipes (6) installed on the side walls at both ends of the lower mold (2). One end of the two air pipes (6) is connected to an air pump (7) located at the bottom of the lower mold (2) in the middle of the base (1).

3. The injection molding die for a plastic pump press head according to claim 2, characterized in that: The other end of the air pipe (6) is connected to the first ventilation hole (8) opened on the inner wall of both ends of the lower mold (2), and the first ventilation hole (8) is also connected to the longitudinal ventilation groove (9) provided inside the lower mold (2).

4. The injection molding die for a plastic pump press head according to claim 3, characterized in that: The longitudinal ventilation groove (9) is connected to the movable cavity at the bottom of the top injection cavity (3) of the lower mold (2), and the movable cavity is provided with a movable block (10).

5. The injection molding die for a plastic pump press head according to claim 4, characterized in that: The top of the movable block (10) is provided with a top rod (11), and the top of the movable block (10) is also provided with a spring (12). The other end of the spring (12) is connected to the top surface of the movable cavity, and the other end of the top rod (11) is located in the through groove connecting the injection cavity (3) and the movable cavity.

6. The injection molding die for a plastic pump press head according to claim 1, characterized in that: The lower mold (2) is also provided with symmetrical auxiliary components on both sides. The auxiliary components include two symmetrical fixing frames (13) that are fixedly connected to the base (1). An electric telescopic rod (14) is fixedly installed on one side of the two fixing frames (13).

7. The injection molding die for a plastic pump press head according to claim 6, characterized in that: One end of the electric telescopic rod (14) is connected to a fixing plate (15). One side of the fixing plate (15) is in contact with the side walls of both ends of the lower mold (2). An auxiliary rod (16) corresponding to the top injection cavity (3) of the lower mold (2) is also provided on one side of the fixing plate (15). One end of the auxiliary rod (16) is inserted into the injection cavity (3).

Images