Cover and cup synchronous injection mold

Abstract

The utility model discloses a cover and cup synchronous injection mold, which relates to the technical field of molds and comprises a front mold, a rear mold, a front demolding component, a gas ejection component and an inclined ejection component. A front mold core is arranged at the rear end of the front mold; the front end of the rear mold is provided with a rear mold core, the rear mold core and the front mold core are matched to form a cavity, the cavity is used for injection molding to form a workpiece, the workpiece comprises a cover body and a cup body, the rear mold core is provided with a protruding part matched with the cup body, the front end of the protruding part is provided with a bottom air flow channel, and the lower end of the side wall of the protruding part is provided with a side air flow channel; the front demolding assembly is arranged on the front mold and used for pushing the workpiece to be separated from the front mold core. The gas cap assembly is arranged at the front end of the protruding part and used for pushing the cup body to be separated from the rear mold core; the pitched roof assembly is arranged on the rear mold, cover buckles are symmetrically arranged on the edge of the cover body, and the pitched roof assembly is used for pushing the cover buckles to rotate towards the cover body. The cover body and the cup body can be synchronously injected, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of moulds, in particular to a synchronous injection mould for a lid and a cup. Background Art

[0002] At present, moulds are the basic process equipment for industrial production. 75% of the rough-machined industrial product parts and 50% of the finish-machined parts are formed by moulds. Most plastic products are also formed by moulds. As the basic industry of the national economy, moulds involve various industries such as machinery, automobile, light industry, electronics, chemical industry, metallurgy, building materials, etc., and have a very wide range of applications. However, general moulds are highly targeted and it is less likely to realize the production of multiple products by one device. In the prior art, the common production methods of cups with lids on the market are all separately formed, and at least two sets of moulds are required for production. Moreover, the demoulding of the cups uses manual demoulding, resulting in low production efficiency, and the mould cost and labor cost are too high. Content of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, the utility model provides a synchronous injection mould for a lid and a cup, which can inject the lid body and the cup body synchronously and improve the production efficiency.

[0004] A synchronous injection mould for a lid and a cup according to an embodiment of the first aspect of the utility model includes: a front mould, a rear mould, a front demoulding assembly, an air ejector assembly, and an inclined ejector assembly. A front mould core is arranged at the rear end of the front mould; a rear mould core is arranged at the front end of the rear mould, and the rear mould core cooperates with the front mould core to form a cavity for injecting a workpiece. The workpiece includes a lid body and a cup body. The rear mould core is provided with a protruding part matching the cup body. A bottom air flow channel is arranged at the front end of the protruding part, and a side air flow channel is arranged at the lower end of the side wall of the protruding part; the front demoulding assembly is arranged on the front mould and is used to push the workpiece to separate from the front mould core; the air ejector assembly is arranged at the front end of the protruding part and is used to push the cup body to separate from the rear mould core; the inclined ejector assembly is arranged on the rear mould, and lid buckles are symmetrically arranged at the edge of the lid body. The inclined ejector assembly is used to push the lid buckles to rotate towards the lid body.

[0005] A synchronous injection mould for a lid and a cup according to an embodiment of the utility model has at least the following beneficial effects: The cavity is used for injecting a workpiece. After the front mould and the rear mould are separated, through the cooperation of the front demoulding assembly, the air ejector assembly and the inclined ejector assembly, the workpiece is assisted to separate from the front mould and the rear mould. Compared with manual taking for demoulding, it has the advantages of high demoulding efficiency and can also reduce the risk of injury to the operator.

[0006] According to some embodiments of the present utility model, the air top assembly includes a top cover, a first push rod, and a first driving part. The first push rod is disposed through the rear mold core in the front-rear direction. The top cover is connected to the first push rod and is located at the front end of the protruding part. The first driving part is disposed on the rear mold, and the first driving part is used to drive the first push rod to move back and forth. The cavity is formed by the cooperation of the top cover, the rear mold core, and the front mold core.

[0007] According to some embodiments of the present utility model, the front demolding assembly includes a cup demolding air channel and a cover demolding air channel.

[0008] According to some embodiments of the present utility model, the inclined top assembly includes a plurality of ejector rods and a second driving part. The ejector rods are disposed through the rear mold core. The ejector rods incline towards the center of the contact part between the rear mold core and the cover body. The second driving part is installed on the rear mold, and the second driving part is used to drive the ejector rods to extend out of the rear mold core and push the cover buckle to rotate towards the cover body.

[0009] According to some embodiments of the present utility model, the second driving part includes a sliding plate and an elastic member. The ejector rod is connected to the front side of the sliding plate. The sliding plate is adjustably installed at the rear side of the rear mold in the front-rear direction. The elastic member is located between the sliding plate and the rear mold. Both the rear mold and the front mold are installed on an injection molding machine. The injection molding machine can drive the rear mold to move backward to separate from the front mold. When the rear mold moves backward, the ejector pin on the injection molding machine abuts against the sliding plate to make the sliding plate move forward relative to the rear mold. When the sliding plate moves forward relative to the rear mold, the elastic member is compressed. When the rear mold moves forward, the elastic member pushes the sliding plate to move backward relative to the rear mold.

[0010] According to some embodiments of the present utility model, the sliding plate is connected with a plurality of insertion rods extending in the front-rear direction. An inclined groove cooperating with the ejector rod is arranged on the front side of the insertion rod. When the insertion rod moves back and forth relative to the rear mold, the inclined groove drives the ejector rod to extend out of and retract into the front side of the rear mold core.

[0011] According to some embodiments of the present utility model, a guiding member is arranged on the front mold, and the guiding member is used to guide the rear mold.

[0012] According to some embodiments of the present utility model, a feed pipe connected to the injection molding machine is arranged in the front mold, and the feed pipe is communicated with the cavity.

[0013] According to some embodiments of the present utility model, cooling channels are arranged in both the front mold and the rear mold.

[0014] According to some embodiments of the present utility model, four cavities are provided, which are respectively used for injection molding two of the cup bodies and two of the cover bodies.

[0015] A synchronous injection mold for a cover and a cup according to an embodiment of the present utility model has at least the following beneficial effects:

[0016] (1) Compared with manual taking for demolding, it has the advantages of high demolding efficiency and can also reduce the risk of injury to operators;

[0017] (2) The inclined ejector assembly and the air ejector assembly are used to push the cover body, with a large contact area, not easily deforming the cover body, and effectively improving the qualification rate of workpieces;

[0018] (3) The cooling channels are provided to improve the cooling speed of the workpieces after injection molding, thereby improving production efficiency.

[0019] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0020] The following further describes the present utility model in conjunction with the drawings and embodiments, where:

[0021] Figure 1 is a schematic diagram of the installation structure of an embodiment of the present utility model;

[0022] Figure 2 is a schematic diagram of the rear mold of an embodiment of the present utility model;

[0023] Figure 3 is Figure 2 an enlarged view of part A in

[0024] Figure 4 is a schematic diagram of the front mold of an embodiment of the present utility model;

[0025] Figure 5 is a schematic sectional view of an embodiment of the present utility model;

[0026] Figure 6 is Figure 5 an enlarged view of part B in

[0027] Figure 7 is Figure 5 an enlarged view of part C in

[0028] Figure 8 is a schematic diagram of the sliding plate of an embodiment of the present utility model;

[0029] Figure 9 is a schematic diagram of the ejector rod and the insertion rod of an embodiment of the present utility model.

[0030] Reference numerals:

[0031] Front mold 100, front mold core 110;

[0032] Rear mold 200, rear mold core 210, protruding portion 211;

[0033] Workpiece 300, cover 310, cover buckle 311, cup body 320;

[0034] Air ejector assembly 400, top cover 410, first push rod 420, first driving part 430;

[0035] Lifter assembly 500, ejector rod 510, second driving part 520, sliding plate 521, elastic member 522, insertion rod 523, inclined slot 524;

[0036] Guide member 600;

[0037] Feeding pipe 700. Detailed implementation manners

[0038] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model, and should not be construed as a limitation to the present utility model.

[0039] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as up and down, etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model 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 should not be construed as a limitation to the present utility model.

[0040] In the description of the present utility model, "a plurality of" means more than two. If the first and the second are described, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0041] In the description of the present utility model, unless otherwise clearly defined, terms such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present utility model in combination with the specific content of the technical solution.

[0042] Refer to Figures 1 to 9As shown in the figure, a synchronous injection mold for a lid and a cup according to an embodiment of the present utility model includes: a front mold 100, a rear mold 200, a front demolding assembly, an air ejector assembly 400, and a lifter pin assembly 500. A front mold core 110 is provided at the rear end of the front mold 100; the front mold core 110 is detachably connected to the front mold 100 for easy installation and maintenance. Usually, the front mold core 110 and the front mold 100 are bolted together. It can be foreseen that the front mold core 110 can be integrally formed with the front mold 100 to improve durability and precision. A rear mold core 210 is provided at the front end of the rear mold 200. The rear mold core 210 is detachably connected to the rear mold 200 for easy installation and maintenance. Usually, the rear mold core 210 and the rear mold 200 are bolted together. It can be foreseen that the rear mold core 210 can be integrally formed with the rear mold 200 to improve durability and precision. The rear mold core 210 cooperates with the front mold core 110 to form a cavity for injection molding a workpiece 300. The workpiece 300 includes a lid body 310 and a cup body 320. Plastic is injected into the cavity after melting to form the workpiece. The front mold 100 and the rear mold 200 are vertically arranged and parallel to each other, and the rear mold 200 can move back and forth relative to the front mold 100. It can be foreseen that the front mold 100 and the rear mold 200 need to be installed on an injection molding machine for use. The injection molding machine has the function of moving the front mold 100 and the rear mold 200 closer and farther apart. The specific structure and installation method of the injection molding machine are prior art and will not be described in detail here. The rear mold core 210 is provided with a protrusion 211 that matches the cup body 320, and the front mold core 110 is provided with a recess that matches the cup body 320. The protrusion 211 and the recess make the cup body 320 have a certain curvature. During the demolding process, the workpiece 300 shrinks due to the effect of thermal expansion and contraction, and is more likely to remain on the protrusion 211 of the rear mold core 210. A bottom air flow channel is provided at the front end of the protrusion 211, and a side air flow channel is provided at the lower end of the side wall of the protrusion 211; both the bottom air flow channel and the side air flow channel are connected to a compressed air pipeline, and the compressed air pipeline supplies compressed air with a pressure of 0.8 MPa to 2 MPa to the bottom air flow channel and the side air flow channel. The compressed air flowing out of the bottom air flow channel impacts the inner wall of the cup body 320, causing the cup body 320 to separate from the protrusion 211. The compressed air flowing out of the side air flow channel impacts the rear edge of the cup body 320, causing the cup body 320 to separate from the protrusion 211. The bottom air flow channel and the side air flow channel cooperate to effectively demold the cup body 320. The front demolding assembly is arranged on the front mold 100 and is used to push the workpiece 300 to separate from the front mold core 110; after the plastic is molded in the cavity, the front mold 100 and the rear mold 200 are separated under the drive of a hydraulic device or manually, so that the rear mold core 210 is separated from the front mold core 110. When the rear mold core 210 is separated from the front mold core 110, the front demolding assembly pushes the workpiece 300 away from the front mold core 110. The air ejector assembly 400 is arranged at the front end of the protrusion 211 and is used to push the cup body 320 to separate from the rear mold core 210; the lifter pin assembly 500 is arranged on the rear mold 200. Four lid buckles 311 are symmetrically arranged at the edge of the lid body 310, and the lifter pin assembly 500 is used to push the lid buckles 311 to rotate towards the lid body 310.Due to the structural characteristics of the cover 310 being similar to a thin-walled plate, if the cover 310 is ejected from the middle of the cover 310, the edge of the cover 310 may still adhere to the rear mold core 210 due to the action of atmospheric pressure, resulting in the cover 310 being unable to be smoothly demolded or damaged. Therefore, the lifter assembly 500 is used to push the cover buckle 311 at the edge of the cover 310 for demolding. This enables the cover 310 to be demolded without being affected by atmospheric pressure. Since the cup body 320 is shrink-fitted on the protruding portion 211 of the rear mold core 210, a relatively large force is required for demolding. However, the thrust generated by the compressed air in the bottom air flow channel and the side air flow channel is limited and insufficient to push the cup body 320. Therefore, the air ejection assembly 400 is needed for demolding. However, the stroke of the air ejection assembly 400 is usually limited. After the cup body 320 is pushed forward a certain distance, the cup body 320 will still hang on the protruding portion 211 and cannot fall off. The compressed air in the bottom air flow channel and the side air flow channel can blow the cup body 320 off. Therefore, the air ejection assembly 400, the bottom air flow channel, and the side air flow channel cooperate together to ensure that the cup body 320 can completely fall off from the protruding portion 211 of the rear mold core 210. Compared with manual demolding, it has the advantages of high demolding efficiency and can also reduce the risk of operator injury.

[0043] Referring to Figure 7 As shown, it can be understood that the air ejection assembly 400 includes a top cover 410, a first push rod 420, and a first driving part 430. The first push rod 420 is disposed through the rear mold core 210 in the front-rear direction, and the first push rod 420 can move back and forth to drive the top cover 410 to move back and forth. The shape and size of the top cover 410 match the shape and size of the front end of the protruding portion 211. The transition between the outer peripheral wall of the protruding portion 211 and the outer peripheral wall of the top cover 410 should be smooth to facilitate the formation of a smooth inner wall of the cup body 320. The top cover 410 is connected to the first push rod 420. The top cover 410 is located at the front end of the protruding portion 211. After the cup body 320 is formed, the inner wall of the cup body 320 contacts the front end of the top cover 410. The first driving part 430 is installed in the rear mold 200, and the first driving part 430 is selected from a pneumatic push rod or an electric push rod. The first driving part 430 is used to drive the first push rod 420 to move back and forth. The cavity is formed by the cooperation of the top cover 410, the rear mold core 210, and the front mold core 110. After the front mold 100 and the rear mold 200 are separated, the first driving part 430 pushes the first push rod 420 forward, and the top cover 410 drives the cup body 320 to separate from the protruding portion 211. Then, the compressed air in the bottom air flow channel and the side air flow channel pushes the cup body 320 to fall off from the top cover 410. It can be foreseen that the bottom air flow channel extends to the top cover 410.

[0044] Referring to Figures 1 to 7As shown, it can be understood that the front demolding assembly includes a cup demolding air duct and a lid demolding air duct. The cup demolding air duct extends to the front mold core 110 for forming. The demolding air ducts for the mold and the lid are both connected to a compressed air pipeline, and the compressed air pipeline supplies compressed air with a pressure of 0.8 MPa to 2 MPa to the cup demolding air duct and the lid demolding air duct. Compressed air is introduced into the cup demolding air duct and the lid demolding air duct to push the cup body 320 and the lid body 310 to separate from the front mold core 110. Since the adhesion force between the lid body 310 and the cup body 320 and the front mold core 110 is not large, separation can be achieved using compressed air. It can be foreseen that since the contact area between the front mold core 110 and the cup body 320 is small and the adhesion force is not large, there is no need to arrange a front demolding assembly. When the front mold 100 and the rear mold 200 are separated, the cup body 320 can automatically separate from the front mold core 110. It can be foreseen that since the contact area between the front mold core 110 and the lid body 310 is small and the adhesion force is not large, there is no need to arrange a front demolding assembly. When the front mold 100 and the rear mold 200 are separated, the lid body 310 can automatically separate from the front mold core 110.

[0045] Referring to Figures 1 to 9 As shown, it can be understood that the lifter assembly 500 includes a plurality of ejector rods 510 and a second driving part 520. The ejector rods 510 penetrate through the rear mold core 210. When injecting plastic into the cavity, the front end of the ejector rod 510 is flush with the front surface of the rear mold core 210, so as to keep the rear end surface of the lid buckle 311 flat. The ejector rods 510 are inclined towards the center of the contact part between the rear mold core 210 and the lid body 310. Since four lid buckles 311 are evenly arranged on the upper edge of the lid body 310, four ejector rods 510 are also provided, and each ejector rod 510 individually pushes the corresponding buckle. The included angle between the moving direction of the ejector rod 510 and the front-rear direction ranges from 5 degrees to 20 degrees. The second driving part 520 is installed on the rear mold 200. The second driving part 520 drives the ejector rods 510 to extend out of the rear mold core 210 and push the lid buckles 311 to rotate towards the lid body 310. Since a plurality of ejector rods 510 need to be driven, if a device for pushing each ejector rod 510 to move is arranged for each ejector rod 510, it cannot be installed inside the rear mold 200. Therefore, the same second driving part 520 is used to drive the four ejector rods 510 to move synchronously, saving the internal space of the rear mold 200.

[0046] Referring to Figures 1 to 9As shown, it can be understood that the second driving part 520 includes a sliding plate 521 and an elastic member 522. The ejector rod 510 is connected to the front side of the sliding plate 521. The sliding plate 521 is installed on the rear side of the rear mold 200 in a front-back adjustable manner. A plurality of guide rods are provided on the rear side of the rear mold 200 to guide the sliding plate 521, so that the sliding plate 521 can only move back and forth. The elastic member 522 is located between the sliding plate 521 and the rear mold 200. The elastic member 522 is a spring, and the spring is sleeved on the guide rod. One end of the spring abuts against the sliding plate 521, and the other end abuts against the rear mold 200. Both the rear mold 200 and the front mold 100 are installed on the injection molding machine. The injection molding machine can drive the rear mold 200 to move backward to separate from the front mold 100, and the injection molding machine is connected with an ejector pin. When the rear mold 200 moves backward, the ejector pin on the injection molding machine abuts against the sliding plate 521 to make the sliding plate 521 move forward relative to the rear mold 200. When the sliding plate 521 moves forward relative to the rear mold 200, the elastic member 522 is compressed. When the rear mold 200 moves forward, the elastic member 522 pushes the sliding plate 521 to move backward relative to the rear mold 200. Since the front mold 100 is connected to the injection pipe of the injection molding machine, usually the smaller-volume and less-connected-back part is driven to move. The ejector rod 510 can be fixed, and the sliding plate 521 is driven to move by the movement of the rear mold 200 itself. A back plate is bolted to the rear end of the rear mold 200, and the back plate is bolted to the extrusion machine. A plurality of back plate holes for the ejector pins to pass through are provided on the back plate.

[0047] Referring to Figures 6 to 9 As shown, it can be understood that the sliding plate 521 is connected with a plurality of insertion rods 523 extending back and forth. The number of the insertion rods 523 is the same as that of the ejector rods 510. An inclined groove 524 cooperating with the ejector rod 510 is provided on the front side of the insertion rod 523. The rear end of the insertion rod 523 is slidably installed in the inclined groove 524. A hook is provided at the rear end of the insertion rod 523 to be embedded in the inclined groove 524, so that the rear end of the insertion rod 523 can only move along the extending direction of the inclined groove 524. When the insertion rod 523 moves back and forth relative to the rear mold 200, the inclined groove 524 drives the ejector rod 510 to extend out of and retract from the front side of the mold core 210. While the ejector rod 510 moves, the rear end of the ejector rod 510 slides in the chute. Through the cooperation of the insertion rod 523 and the ejector rod 510, the back-and-forth movement of the sliding plate 521 is converted into the movement of the ejector rod 510 along its extending direction, which has the advantages of compact structure and simple maintenance.

[0048] Figures 1 to 9As shown, it can be understood that a guiding member 600 is provided on the front mold 100, and the guiding member 600 is selected as a metal optical axis. The guiding member 600 extends in the front-rear direction, and four guiding members 600 are symmetrically arranged. The guiding member 600 is used to guide the rear mold 200. A sleeve sleeved on the optical axis is provided on the rear mold 200, and the sleeve can move back and forth along the guiding member 600. The guiding member 600 and the sleeve cooperate to guide when the rear mold 200 moves back and forth, so that the rear mold 200 can be kept aligned with the front mold 100 in the front-rear direction during the movement, and the rear mold 200 can also be kept parallel to the front mold 100 during the movement. The molding quality of the workpiece 300 is improved.

[0049] Figures 1 to 9 As shown, it can be understood that a feed pipe 700 connected to an injection molding machine is provided in the front mold 100, and the feed pipe 700 communicates with the cavity. The injection molding machine transports the molten plastic to the cavity through the feed pipe 700, and a heating component is provided around the feed pipe 700 to prevent the plastic from solidifying and blocking in the feed pipe 700.

[0050] Figures 1 to 9 As shown, it can be understood that cooling channels are provided in both the front mold 100 and the rear mold 200. Since the workpiece 300 needs to be cooled and solidified before demolding after injection molding, a coolant is introduced into the cooling channels, and the coolant is usually selected as water. The front mold 100 and the rear mold 200 are quickly cooled, which can improve the cooling speed of the workpiece 300 after injection molding and improve the production efficiency.

[0051] Refer to Figures 2 to 4 As shown, it can be understood that four cavities are provided, which are respectively used for injection molding two cup bodies 320 and two cover bodies 310. Multiple cavities can be provided to improve the production efficiency. However, the more cavities there are, the larger the sizes of the front mold 100 and the rear mold 200 are, and the higher the manufacturing cost of the equipment is. Therefore, in this embodiment, four cavities are provided to simultaneously injection mold two cup bodies 320 and two cover bodies 310, taking into account both the production efficiency and the equipment cost.

[0052] It can be understood that a rear ring is provided on the rear mold 200, and the rear ring is made of metal. The rear ring is connected to the sliding plate 521 through a plurality of second push rods. The rear ring is movably arranged on the rear mold 200 in the front-rear direction. A part of the rear ring is used to cooperate with the front mold core 110 and the rear mold core 210 to form a cavity. A groove for the rear ring to be embedded is provided on the rear mold core 210. When the rear ring moves forward with the sliding plate 521, it abuts against the edge of the cup body 320, and a part of the rear end edge of the cup body 320 abuts against the rear ring. The cup body 320 is separated from the rear mold core 210 by pushing the edge of the cup body 320. The rear ring is used to push the cover body 310, and the contact area is large, so it is not easy to deform the cover body 310, effectively improving the qualification rate of the workpiece 300.

[0053] Usage steps: Bolt the front mold 100 and the rear mold 200 to the injection molding machine respectively. The injection molding machine drives the front mold 100 and the rear mold 200 to approach each other. The rear mold core 210 and the front mold core 110 cooperate to form a cavity. The injection molding machine transports the molten plastic into the cavity through the feed pipe 700. Coolant is introduced into the cooling channels to rapidly cool down the front mold 100 and the rear mold 200. The molten plastic solidifies in the cavity to form the workpiece 300. Due to the thermal expansion and contraction effect, the workpiece 300 shrinks, and the cover 310 will tightly sleeve on the protruding part 211 of the rear mold core 210. Then the injection molding machine drives the front mold 100 and the rear mold 200 to separate from each other. Due to thermal expansion and contraction, the cover 310 and the cup body 320 will separate from the front mold core 110 after cooling and remain on the rear mold core 210. When the rear mold 200 moves backward, the ejector pin on the injection molding machine abuts against the sliding plate 521 to make the sliding plate 521 move forward relative to the rear mold 200. The sliding plate 521 drives the ejector rod 510 and the rear ring to push the cup body 320 and the cover 310 away from the rear mold core 210. The first driving part 430 drives the top cover 410 to move forward to push the cup body 320 away from the rear mold core 210. The bottom air flow channel and the side air flow channel cooperate to use compressed air to separate the cup body 320 from the protruding part 211. When the sliding plate 521 moves forward relative to the rear mold 200, the elastic member 522 is compressed. When the rear mold 200 moves forward, the elastic member 522 pushes the sliding plate 521 to move backward relative to the rear mold 200 to reset.

[0054] The above has described the embodiments of the present invention in detail with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the purpose of the present invention.

Claims

1. A synchronous injection mold for a lid and a cup, characterized in that, Comprising: A front mold (100), with a front mold core (110) provided at the rear end of the front mold (100); A rear mold (200), with a rear mold core (210) provided at the front end of the rear mold (200). The rear mold core (210) cooperates with the front mold core (110) to form a cavity for injection molding a workpiece (300). The workpiece (300) includes a cover body (310) and a cup body (320). The rear mold core (210) is provided with a protruding portion (211) matching the cup body (320). A bottom air flow channel is provided at the front end of the protruding portion (211), and a side air flow channel is provided at the lower end of the side wall of the protruding portion (211); A front demolding assembly, provided on the front mold (100), for pushing the workpiece (300) to separate from the front mold core (110); An air ejection assembly (400), provided at the front end of the protruding portion (211), for pushing the cup body (320) to separate from the rear mold core (210); An inclined ejector assembly (500), provided on the rear mold (200). Cover buckles (311) are symmetrically provided at the edge of the cover body (310). The inclined ejector assembly (500) is used to push the cover buckles (311) to rotate towards the cover body (310).

2. The cover and cup synchronous injection mold according to claim 1, characterized in that: The air ejection assembly (400) includes a top cover (410), a first push rod (420), and a first driving part (430). The first push rod (420) is disposed through the rear mold core (210) in the front-rear direction. The top cover (410) is connected to the first push rod (420) and is located at the front end of the protruding portion (211). The first driving part (430) is provided on the rear mold (200), and the first driving part (430) is used to drive the first push rod (420) to move back and forth. The cavity is formed by the cooperation of the top cover (410), the rear mold core (210), and the front mold core (110).

3. The cover and cup synchronous injection mold according to claim 1, characterized in that: The front demolding assembly includes a cup demolding air channel and a cover demolding air channel.

4. The cover and cup synchronous injection mold according to claim 1, characterized in that: The inclined ejector assembly (500) includes a plurality of ejector rods (510) and a second driving part (520). The ejector rods (510) are disposed through the rear mold core (210). The ejector rods (510) are inclined towards the center of the contact portion between the rear mold core (210) and the cover body (310). The second driving part (520) is installed on the rear mold (200), and the second driving part (520) is used to drive the ejector rods (510) to extend out of the rear mold core (210) and push the cover buckles (311) to rotate towards the cover body (310).

5. The lid and cup synchronous injection mold according to claim 4, characterized in that: The second driving part (520) includes a sliding plate (521) and an elastic member (522). The ejector rod (510) is connected to the front side of the sliding plate (521). The sliding plate (521) is installed on the rear side of the rear mold (200) in a front-back adjustable manner. The elastic member (522) is located between the sliding plate (521) and the rear mold (200). Both the rear mold (200) and the front mold (100) are installed on an injection molding machine. The injection molding machine can drive the rear mold (200) to move backward to separate from the front mold (100). When the rear mold (200) moves backward, a ejector pin on the injection molding machine abuts against the sliding plate (521) to make the sliding plate (521) move forward relative to the rear mold (200). When the sliding plate (521) moves forward relative to the rear mold (200), the elastic member (522) is compressed. When the rear mold (200) moves forward, the elastic member (522) pushes the sliding plate (521) to move backward relative to the rear mold (200).

6. The lid and cup synchronous injection mold according to claim 5, characterized in that: A plurality of insertion rods (523) extending in the front-back direction are connected to the sliding plate (521). An inclined groove (524) cooperating with the ejector rod (510) is arranged on the front side of the insertion rod (523). When the insertion rod (523) moves back and forth relative to the rear mold (200), the inclined groove (524) drives the ejector rod (510) to extend out of and retract into the front side of the rear mold core (210).

7. The cover and cup synchronous injection mold according to claim 1, characterized in that: A guiding member (600) is arranged on the front mold (100). The guiding member (600) is used for guiding the rear mold (200).

8. The cover and cup synchronous injection mold according to claim 1, characterized in that: A feed pipe (700) connected to the injection molding machine is arranged in the front mold (100). The feed pipe (700) communicates with the cavity.

9. The lid and cup synchronous injection mold according to claim 1, characterized in that: Cooling channels are arranged in both the front mold (100) and the rear mold (200).

10. The cover and cup synchronous injection mold according to claim 1, wherein: Four cavities are provided, which are respectively used for injection molding two of the cup bodies (320) and two of the cover bodies (310).

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