mold structure

Abstract

This invention discloses a mold structure, relating to the field of mold technology. The mold structure includes an upper mold base, a lower mold base, an ejection structure, and a drive assembly. The upper mold base has an upper mold core. The lower mold base is arranged opposite to the upper mold base in the vertical direction and has a lower mold core. The lower mold core also has a flow channel communicating with the injection cavity. The lower mold core forms a first ejection channel communicating with the injection cavity and a second ejection channel communicating with the flow channel. The ejection structure includes a first ejector and a second ejector. The first ejector is movably inserted into the first ejection channel in the vertical direction, and the second ejector is movably inserted into the second ejection channel in the vertical direction. The drive assembly is used to drive the second ejector and the first ejector to contact the injection molded part sprue and the injection molded part body sequentially. An ejection-and-pull-out method is adopted, where the sprue is first ejected from the flow channel by the second ejector, and then the injection molded part is ejected from the lower mold core by the first ejector, ultimately achieving a secondary ejection.

Description

Technical Field

[0001] This invention relates to the field of mold technology, and in particular to mold structure. Background Technology

[0002] Plastics are essential for industrial production and daily life. With the development of the social economy, the demand for plastic products is constantly increasing. For molds used to produce plastic products, how to simplify the structure of the molds as much as possible while meeting the demand for more products has become an urgent problem to be solved. Summary of the Invention

[0003] The main objective of this invention is to propose a mold structure that simplifies the mold structure while achieving plastic processing, eliminating the need for separate ejector rods and accelerated ejection mechanisms.

[0004] To achieve the above objectives, the present invention proposes a mold structure, comprising:

[0005] Upper mold base, wherein an upper mold core is provided on the upper mold base;

[0006] The lower mold base is disposed opposite to the upper mold base in the vertical direction. The lower mold base is provided with a lower mold core. The lower mold core is used to define an injection cavity together with the upper mold core when the upper mold base and the lower mold base are closed. The lower mold core is also provided with a flow channel communicating with the injection cavity. The lower mold core forms a first ejection channel communicating with the injection cavity and a second ejection channel communicating with the flow channel.

[0007] An ejection structure includes a first ejector and a second ejector spaced apart in a horizontal direction. The first ejector is movably inserted through a first ejection channel in a vertical direction for contacting the body of the injection molded part in the injection cavity. The second ejector is movably inserted through a second ejection channel in a vertical direction for contacting the sprue of the injection molded part in the injection cavity.

[0008] A driving component is used to drive the second ejector and the first ejector to contact the injection molded part slurry and the injection molded part body in sequence.

[0009] In one embodiment, the lower mold base includes:

[0010] Base plate; and,

[0011] The male template is located above the base plate, and the middle part of the male template is hollowed out for the lower mold core to be embedded and installed.

[0012] The driving assembly includes an ejector plate, which is disposed between the base plate and the male template and can move in the vertical direction under the action of the injection molding machine ejector rod. During the movement of the ejector plate, it can drive the first ejector and the second ejector to move.

[0013] In one embodiment, an elastic reset member is provided between the ejector plate and the male template.

[0014] In one embodiment, the driving component includes:

[0015] An ejector plate is movably mounted on the lower mold base in the vertical direction and is located below the lower mold core. The ejector plate is provided with the second ejector component.

[0016] A connecting seat, located between the ejector plate and the lower mold core, and movable in the vertical direction, has a first ejector component disposed on its upper end surface. The connecting seat also has a clearance hole corresponding to the second ejection channel for the second ejector component to pass through.

[0017] A push rod, the lower end of which is fixed to the top plate, and the upper end of which can contact the connecting seat when the top plate moves upward, so as to drive the connecting seat to move.

[0018] In one embodiment, the connecting seat has a receiving groove with its lower side open, and the upper end of the push rod is located in the receiving groove;

[0019] When the upper mold base and the lower mold base separate, a clearance gap is formed between the upper end of the push rod and the upper wall of the receiving groove.

[0020] In one embodiment, the connecting seat includes a first seat body and a second seat body arranged in a vertical direction. The lower end face of the first seat body is provided with a first groove, and the second seat body is provided with a connecting hole communicating with the first groove. The connecting hole and the first groove together enclose the receiving groove to form the receiving groove. The connecting hole is stepped to form a first stepped surface facing upward.

[0021] The upper end of the push rod is stepped to form a downward-facing second step surface. The upper end of the push rod is located inside the connecting hole, and the second step surface can abut against the first step surface.

[0022] In one embodiment, the lower end face of the lower mold core is provided with a plurality of guide grooves arranged circumferentially thereon;

[0023] The upper end of the connecting seat is provided with a plurality of guide rods, which are located around the first ejector and inserted into a plurality of guide grooves.

[0024] In one embodiment, the lower mold core includes a mold core and an insert embedded in the mold core. The insert is columnar, and the outer periphery of the insert forms a first ejection channel arranged in annular shape. The upper end face of the insert is recessed to form the flow channel.

[0025] The first ejector is arranged in a ring shape;

[0026] The second ejector is located inside the first ejector.

[0027] In one embodiment, multiple second ejection channels are provided, and multiple second ejection components are correspondingly provided.

[0028] In one embodiment, the upper mold base and the lower mold base are respectively provided with a first mating groove and a first mating protrusion on their end faces facing each other; and / or,

[0029] The upper mold core and the lower mold core are respectively provided with a second mating groove and a second mating protrusion on their end faces facing each other.

[0030] In the technical solution of this invention, the upper mold base and the lower mold base achieve mutual approach and mold closing or mutual separation based on the injection molding machine. Through the structural arrangement of the upper and lower mold cores, an injection cavity is formed after assembly. The runner on the lower mold core serves as a channel to deliver the raw material from the nozzle to the injection cavity. After molding, the rubber material in the injection cavity forms the main body of the injection molded part, and the rubber material in the runner forms the injection molded part slurry. Using an ejection-and-pull method, the drive assembly drives the second ejector to first contact the slurry, ejecting it from the runner. Then, the first ejector contacts the main body of the injection molded part, ejecting it from the lower mold core, ultimately achieving secondary ejection. This simplifies the mold plate structure, eliminating the need for separate ejector rods and accelerating ejection mechanisms. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0032] Figure 1 A schematic diagram of an embodiment of the mold structure provided by the present invention;

[0033] Figure 2 for Figure 1 Schematic diagram of the structure of the lower and middle mold base;

[0034] Figure 3 for Figure 1 A schematic diagram of the structure of the lower and middle mold cores and the drive assembly;

[0035] Figure 4 for Figure 1 A schematic diagram of the structure of the drive component;

[0036] Figure 5 for Figure 4 Cross-sectional schematic diagram of the drive component;

[0037] Figure 6 for Figure 1 A schematic diagram of the upper and middle mold base.

[0038] Explanation of icon numbers:

[0039] 100. Mold structure; 1. Upper mold base; 11. Upper mold core; 111. Second mating protrusion; 12. First mating protrusion; 2. Lower mold base; 20. First ejection channel; 21. Base plate; 22. Male mold plate; 23. Lower mold core; 231. Mold core; 232. Insert; 233. Second mating groove; 24. Runner; 25. First mating groove; 26. Mold foot plate; 3. Ejection structure; 31. First ejector; 32. Second ejector; 4. Drive assembly; 41. Ejector plate; 42. Elastic reset component; 43. Connecting seat; 431. First seat body; 432. Second seat body; 430. Receiving groove; 44. Push rod; 45. Guide rod.

[0040] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0042] It should be noted that if the embodiments of the present invention involve directional indication, the directional indication is only used to explain the relative positional relationship and movement of the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0043] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0044] Plastics are essential for industrial production and daily life. With the development of the social economy, the demand for plastic products is constantly increasing. For molds used to produce plastic products, how to simplify the structure of the molds as much as possible while meeting the demand for more products has become an urgent problem to be solved.

[0045] Based on this, the present invention proposes a mold structure to solve the above-mentioned technical problems.

[0046] To better understand the embodiments of this application, the mold structure provided according to the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0047] Please refer to Figure 1 , Figure 2 and Figure 5 The mold structure 100 includes an upper mold base 1, a lower mold base 2, an ejector structure 3, and a drive assembly 4. The upper mold base 1 is provided with an upper mold core 11. The lower mold base 2 is arranged opposite to the upper mold base 1 in the vertical direction. The lower mold base 2 is provided with a lower mold core 23. The lower mold core 23 is used to define the injection cavity together with the upper mold core 11 when the upper mold base 1 and the lower mold base 2 are closed. The lower mold core 23 is also provided with a flow channel 24 communicating with the injection cavity. The lower mold core 23 forms a first ejection channel 20 communicating with the injection cavity and a flow channel 24 communicating with the injection cavity. The second ejection channel; the ejection structure 3 includes a first ejector 31 and a second ejector 32 arranged at intervals in the horizontal direction. The first ejector 31 is movably inserted into the first ejection channel 20 in the vertical direction for contacting the main body of the injection molded part in the injection cavity. The second ejector 32 is movably inserted into the second ejection channel in the vertical direction for contacting the injection molded part material in the injection cavity. The driving assembly 4 is used to drive the second ejector 32 and the first ejector 31 to contact the injection molded part in the injection cavity in sequence.

[0048] In the technical solution of this invention, the upper mold base 1 and the lower mold base 2 are based on the injection molding machine to achieve mutual approach and mold closing or mutual separation. Through the structural arrangement of the upper mold core 11 and the lower mold core 23, an injection cavity is formed after assembly. The flow channel 24 on the lower mold core 23 is the channel for delivering the raw material from the nozzle to the injection cavity. After molding, the rubber material in the injection cavity forms the main body of the injection molded part, and the rubber material in the flow channel 24 forms the injection molded part slurry. Using an ejection and extraction method, the drive assembly 4 drives the second ejector 32 to first contact the slurry, ejecting the slurry from the flow channel 24. Then, the first ejector 31 contacts the main body of the injection molded part, ejecting the main body of the injection molded part from the lower mold core 23, ultimately achieving secondary ejection. This simplifies the mold plate structure, eliminating the need for separate ejector rods and accelerated ejection mechanisms.

[0049] Ejection followed by core removal refers to a molding process where the part is ejected from the mold core first, followed by core removal during the mold opening process. This method is suitable for products with special structures, such as tubular products. For these products, the traditional core removal followed by ejection method may damage the product because its axial length is much greater than its diameter. This invention uses an ejection followed by core removal method to avoid this damage and ensure the integrity of the product during the mold opening process.

[0050] For further details, please refer to Figure 2 The lower mold base 2 includes a base plate 21 and a male mold plate 22. The base plate 21 is designed to cooperate with the injection molding machine. The male mold plate 22 is located above the base plate 21 and has a hollowed-out center for the lower mold core 23 to be installed. The drive assembly 4 includes an ejector plate 41, which is located between the base plate 21 and the male mold plate 22 and can move vertically under the action of the injection molding machine's ejector rod. During its movement, the ejector plate 41 can drive the first ejector 31 and the second ejector 32. Both the first ejector 31 and the second ejector 32 are driven by the ejector plate 41. By setting the difference in the driving timing of the ejector plate 41 to drive the first ejector 31 and the second ejector 32, the effect of ejecting the slag first and then the main body can be achieved. Alternatively, by setting a height difference between the first ejector 31 and the second ejector 32, the ejector plate 41 can drive both to move simultaneously. However, due to the height difference, the timing of contact with different parts of the injection molded part is different, thereby achieving the effect of ejecting the slag first and then ejecting the main body of the injection molded part.

[0051] The lower mold base 2 also includes a mold foot plate 26, which is located between the base plate 21 and the male mold plate 22 and is arranged around the periphery of the ejector plate 41, serving to support and limit the movement of the ejector plate 41.

[0052] Please refer to this again. Figure 2 Notches are provided at all four corners of the template 22 to facilitate the assembly and handling of the mold. In addition, these notches not only provide convenient gripping points, but also enhance the stability of the mold during handling, preventing accidental slippage or drop, thereby improving work efficiency and ensuring safety.

[0053] Considering the ejection and reset after mold opening, an elastic reset element 42 is provided between the ejector plate 41 and the male mold plate 22. The elastic reset element 42 is a compression spring, and by selecting a high-temperature resistant material for the compression spring, it can meet the process requirements of mold processing. This compression spring is usually made of high-strength alloy steel, which has excellent fatigue resistance and corrosion resistance, ensuring stable operation in high-temperature and high-pressure environments. In its natural state, the compression spring is pre-compressed based on the initial distance between the ejector plate 41 and the male mold plate 22, exhibiting a taut and powerful state. When ejection is required, the ejector roller of the injection molding machine drives the ejector plate 41 to move upward. The ejector plate 41 rises accordingly, driving the first ejector 31 and / or the second ejector 32 to move, ejecting the molded injection part from the mold. After the ejector roller of the injection molding machine resets, under the action of the rebound force of the compression spring, the ejector plate 41 can quickly reset downward to abut against the base plate 21, returning to its initial position.

[0054] It should be understood that, considering the guidance during the up-and-down movement of the ejector plate 41, guide posts can be set on the ejector plate 41 and guide grooves can be set on the male template 22 to ensure the stability of the linear movement and avoid large deviations during the lifting and lowering of the first ejector 31 and the second ejector 32.

[0055] Please refer to Figures 4 to 5 The drive assembly 4 includes an ejector plate 41, a connecting seat 43, and a push rod 44. The ejector plate 41 is movably mounted on the lower mold base 2 in the vertical direction and is located below the lower mold core 23. A second ejector 32 is provided on the ejector plate 41. The connecting seat 43 is located between the ejector plate 41 and the lower mold core 23 and is movably arranged in the vertical direction. A first ejector 31 is provided on the upper end surface of the connecting seat 43. The connecting seat 43 is provided with a clearance hole corresponding to the second ejection channel for the second ejector 32 to pass through. The lower end of the push rod 44 is fixed on the ejector plate 41, and the upper end of the push rod 44 can contact the connecting seat 43 when the ejector plate 41 moves upward, so as to drive the connecting seat 43 to move. Initially, the upper surface of the push rod 44 is not in contact with the connecting seat 43. During the ejection action, the ejector plate 41 is moved by the ejector roller of the injection molding machine. The upward movement of the ejector plate 41 drives the push rod 44 and the second ejector 32 to move. Then, the second ejector 32 contacts the sprue. At this time, the injection molded part body remains stationary. After the ejector plate 41 moves a certain distance, the push rod 44 contacts the connecting seat 43, thereby pushing the connecting seat 43 upward to drive the first ejector 31 upward, thus pushing the injection molded part body to demold. At this time, the injection molded part sprue and the injection molded part body move together, and finally the injection molded part is ejected. This structural form can simplify the number of templates and reduce mold costs.

[0056] Conventional ejector rods are typically made of steel and are driven by mechanical devices (such as hydraulic or pneumatic systems) during mold opening and closing to detach the part from the mold. Conventional accelerated ejection mechanisms utilize lever principles or other mechanical advantages to increase the ejection speed and force of the ejector pins. They usually include components such as reset pins and locating pins, and the accuracy of stroke calculations is crucial during design. Ideally, the movement of the part should be simulated in 3D software to check for any interference. The ejector in this invention does not use conventional ejector rods or accelerated ejection mechanisms, achieving a secondary ejection effect with a simplified structure.

[0057] To precisely control the timing of the first ejector 31's operation, a receiving groove 430 with its lower side open is formed on the connecting seat 43, and the upper end of the push rod 44 is located within the receiving groove 430. When the upper mold base 1 and the lower mold base 2 separate, a clearance gap is formed between the upper end of the push rod 44 and the upper wall of the receiving groove 430. The push rod 44 is always located within the receiving groove 430, thus ensuring positioning during the lifting and reciprocating process. Initially, a clearance gap is formed between the upper end face of the push rod 44 and the upper wall of the receiving groove 430. During the ejection process, the ejector plate 41 rises, thereby driving the push rod 44 to move upward, and the clearance gap gradually decreases. However, during this process, because the push rod 44 and the connecting seat 43 move relative to each other, the connecting seat 43 remains fixed. When the clearance gap is zero, the push rod 44 contacts the connecting seat 43, and the two begin to rise synchronously. Through the setting of the clearance gap, the effect of the second ejector 32 and the first ejector 31 being driven sequentially is achieved.

[0058] The vertical dimension of the clearance is related to the height of the material. After ejection, it is necessary to ensure that the material is higher than the main body so that it does not hit the product when the material is picked up by the external tooling.

[0059] Please refer to Figure 5 The connecting seat 43 includes a first seat body 431 and a second seat body 432 arranged vertically. The lower end face of the first seat body 431 has a first groove, and the second seat body 432 has a connecting hole communicating with the first groove. The connecting hole and the first groove together form a receiving groove 430. The connecting hole is stepped, forming an upward-facing first stepped surface. The upper end of the push rod 44 is stepped, forming a downward-facing second stepped surface. The upper end of the push rod 44 is located within the connecting hole, and the second stepped surface abuts against the first stepped surface. The first seat body 431 and the second seat body 432 are independent of each other and can be fixedly connected by screws, positioning pins, or other structures. The receiving groove 430 is separated from the first seat body 431 and the second seat body 432 and is installed in conjunction with the push rod 44. The connecting hole of the second seat body 432 is a stepped hole, which can be used for stepped positioning with the T-shaped push rod 44, defining the initial position of the push rod 44. The first groove on the first seat body 431 is a conventional groove, which is easy to process.

[0060] A clearance is formed between the upper end face of the push rod 44 and the bottom wall of the first groove. When the first step surface and the second step surface abut, the push rod 44 is in the connecting hole. According to the design requirements of different working conditions, the upper end face of the push rod 44 can be lower than the upper edge of the connecting hole, or the upper end face of the push rod 44 can be flush with the upper edge of the connecting hole.

[0061] Considering the size and weight of the connecting seat 43 and the first ejector 31, the push rod 44 and the receiving groove 430 are set in multiple sets in a one-to-one correspondence.

[0062] The lower ends of the push rod 44 and the second ejector 32 are both fixed to the ejector plate 41 by screws, thereby ensuring the consistency of the fit when the ejector plate 41 moves.

[0063] Specifically, the ejector plate 41 includes a first plate and a second plate. The first plate mainly serves as a connection and support, while the second plate serves as a guide and reinforcement.

[0064] In addition, the lower end face of the lower mold core 23 is provided with multiple guide grooves arranged circumferentially thereon; the upper end of the connecting seat 43 is provided with multiple guide rods 45, which are located around the first ejector 31 and inserted into the multiple guide grooves. The guide rods 45 and the guide grooves provide a linear guiding fit, which helps the structure to reset and improve the fit accuracy. Specifically, guide rods 45 can be provided on the lower mold core 23 and guide grooves can be provided on the upper mold core 11, or guide grooves can be provided on the lower mold core 23 and guide rods 45 can be provided on the upper mold core 11.

[0065] The shape of the first ejector 31 should match the shape of the injection molded part. In this embodiment, the lower mold core 23 includes a mold core 231 and an insert 232 embedded in the mold core 231. The insert 232 is columnar, and its periphery forms a ring-shaped first ejection channel 20. The surface of the insert 232 is smooth and has a certain degree of hardness to ensure that it will not deform during injection molding and can achieve a good sliding fit with the first ejector 31. The upper end face of the insert 232 is recessed to form a flow channel 24. The design of the flow channel 24 allows the plastic material to be evenly distributed and fill the entire injection cavity. The first ejector 31 is ring-shaped, made of hard material, and its surface is finely machined to ensure that the injection molded part will not be damaged during ejection. The second ejector 32 is located inside the first ejector 31. Its structure is compact and can work effectively in a small space. The body of the injection molded part is ring-shaped to meet the functional requirements of the product. The first ejection channel 20 corresponds to the lower side of the body of the injection molded part. Its dimensions are precise and can completely surround the bottom of the injection molded part. The first ejection channel 20 and the first ejector 31 are arranged in a ring shape. This design not only improves ejection efficiency but also ensures the quality of the injection molded parts. It can also be configured to match different products; when the injection cavity produces products of other shapes, the first ejector 31 and the first ejection channel 20 can be set to other shapes as needed to adapt to different production requirements.

[0066] The insert 232 is a cylindrical fixed insert, and the second ejector 32 is columnar, with at least a portion of the second ejector 32 located inside the insert 232. The upper end of the second ejector 32 corresponds to the flow channel 24 on the insert 232. In this embodiment, the flow channel 24 is radiating, forming multiple branching grooves emanating from the center, and the center of the insert 232 corresponds to the nozzle.

[0067] Given the complex shape of the flow channel 24, multiple second ejector channels and second ejector components 32 are provided to ensure adequate support for the material. These second ejector components 32 are perfectly matched to the flow channel 24 in both function and quantity. Multiple second ejector components 32 are evenly arranged along the circumference, forming a stable annular array to ensure stable ejection force at all angles. These second ejector components 32 correspond to multiple flow channels in the flow channel 24, with each flow channel precisely aligned by one or more second ejector components 32.

[0068] Considering the mold closing and fitting accuracy of the upper mold base 1 and the lower mold base 2, please refer to... Figure 2 and Figure 6 In some embodiments, the upper mold base 1 and the lower mold base 2 are respectively provided with a first mating groove 25 and a first mating protrusion 12 on their end faces facing each other; both the first mating groove 25 and the first mating protrusion 12 are square. When the two are mated, they can provide mating and limiting in the vertical and horizontal directions.

[0069] In some embodiments, the upper mold core 11 and the lower mold core 23 are respectively provided with mutually mating second mating grooves 233 and second mating protrusions 111 on their end faces facing each other. The second mating grooves 233 and the second mating protrusions 111 are precision columnar designs with smooth surfaces and high symmetry, which can ensure a precise positioning effect when the mold is closed. This design not only improves the assembly accuracy of the mold, but also enhances the stability of the overall structure, effectively preventing mold displacement or misalignment when working in high temperature and high pressure environments, thereby ensuring high-quality product molding.

[0070] During the mold closing process, the second mating groove 233 and the second mating protrusion 111 first come into contact and engage, and then the first mating groove 25 and the first mating protrusion 12 come into contact and engage.

[0071] In one embodiment of the present invention, a mold base plate 26 is provided at the upper end of the base plate 21, and an ejector plate 41 is provided inside the mold base plate 26. A push rod 44 is provided on the ejector plate 41, and the upper end of the push rod 44 is connected to a connecting seat 43. A first ejector 31 arranged in a ring is fixed to the first seat 431 of the connecting seat 43 by a fixing square pin. The first ejector 31 is supported by a second seat 432. A male template 22 is provided at the upper end of the mold base plate 26. The male template 22 is frame-shaped, and a lower mold core 23 is embedded in the center of the frame. The lower mold core 23 integrates the mold core 231, the first ejector 31, the insert 232, the connecting seat 43, the guide rod 45, the fixing square pin, and the second ejector 32. The connecting seat 43, the first ejector 31, the guide rod 45, and the insert 232 are connected as one unit, and the ejector plate 41, the push rod 44, and the second ejector 32 are connected as one unit. The ejector roller of the injection molding machine drives the ejector plate 41. The ejector plate 41 moves upward, driving the push rod 44 and the second ejector 32. The second ejector 32 ejects the material in the runner 24. At this time, the push rod 44 moves in the receiving groove 430, while the first ejector 31 and the product remain stationary. After the push rod 44 contacts the first seat 431, the first seat 431 moves simultaneously with the first ejector 31 under the push of the push rod 44. At this time, the second ejector 32 continues to be driven upward, so that the material and the main body of the injection molded part move together, driving the product to demold. This process allows the runner 24 to eject a certain distance first, and then eject the product.

[0072] Specifically, the adhesive is injected from above, flows through the injection channel of the upper mold core 11 into the channel 24 of the lower mold core 23, and finally enters the injection cavity.

[0073] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural transformations made using the contents of the specification and drawings of the present invention under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the scope of patent protection of the present invention.

Claims

1. A mold structure characterized by, The injection molding machine comprises: an upper mold base provided with an upper mold core; a lower mold base oppositely arranged with the upper mold base in the up-down direction, the lower mold base being provided with a lower mold core for defining an injection cavity together with the upper mold core when the upper mold base and the lower mold base are closed, the lower mold core being further provided with a flow channel communicating with the injection cavity, the lower mold core being formed with a first ejection channel communicating with the injection cavity and a second ejection channel communicating with the flow channel; an ejection structure comprising a first ejection member and a second ejection member arranged in the horizontal direction, the first ejection member being movably arranged in the first ejection channel in the up-down direction for contacting a main body of an injection part in the injection cavity, the second ejection member being movably arranged in the second ejection channel in the up-down direction for contacting an injection part stub in the injection cavity; and a driving assembly for driving the second ejection member and the first ejection member to successively contact the injection part stub and the main body of the injection part, the driving assembly comprising: an ejection plate movably arranged on the lower mold base in the up-down direction and located below the lower mold core, the ejection plate being provided with the second ejection member; a connecting seat located between the ejection plate and the lower mold core and movably arranged in the up-down direction, the upper end surface of the connecting seat being provided with the first ejection member, the connecting seat being provided with a clearance hole corresponding to the second ejection channel for allowing the second ejection member to pass through, the connecting seat comprising a first seat body and a second seat body arranged in the up-down direction, the lower end surface of the first seat body being provided with a first recess, the second seat body being provided with a communication hole communicating with the first recess, the communication hole and the first recess jointly forming an accommodating groove, the communication hole being arranged in steps to form a first step surface arranged upwardly; a push rod, the lower end of the push rod being fixed on the ejection plate, the upper end of the push rod being capable of contacting the connecting seat when the ejection plate moves upwardly to drive the connecting seat to move, the upper end of the push rod being arranged in steps to form a second step surface arranged downwardly, the upper end of the push rod being located in the communication hole and the second step surface being capable of abutting against the first step surface, a clearance being formed between the upper end of the push rod and the upper wall of the accommodating groove when the upper mold base and the lower mold base are separated; the lower mold core comprising a mold core and an insert arranged on the mold core, the insert being arranged in a column shape, the periphery of the insert forming the first ejection channel arranged in a ring shape, the upper end surface of the insert being recessed to form the flow channel; the first ejection member being arranged in a ring shape; the second ejection member being located inside the first ejection member. the lower mold base comprising:

2. The mold structure of claim 1, wherein a bottom plate; and a male mold plate located above the bottom plate, the middle part of the male mold plate being arranged in a hollow shape for allowing the lower mold core to be arranged and fixed thereon; the driving assembly comprising an ejection plate arranged between the bottom plate and the male mold plate and capable of moving in the up-down direction under the action of an injection machine ejector rod, the ejection plate being capable of driving the first ejection member and the second ejection member to move during the movement of the ejection plate. ​ 3. The mold structure of claim 2, wherein An elastic reset member is arranged between the ejection plate and the male mold plate.

4. The mold structure of claim 1, wherein The lower end surface of the lower mold core is provided with a plurality of guide grooves arranged along the circumference thereof; The upper end of the connecting seat is provided with a plurality of guide rods, the plurality of guide rods are arranged at the periphery of the first ejection member, and the plurality of guide rods are inserted into the plurality of guide grooves.

5. The mold structure of claim 1, wherein A plurality of second ejection channels are arranged, and a plurality of second ejection members are arranged correspondingly.

6. The mold structure of claim 1, wherein The end surfaces of the upper mold seat and the lower mold seat facing each other are respectively provided with a first matching groove and a first matching protrusion matched with each other; and / or, The end surfaces of the upper mold core and the lower mold core facing each other are respectively provided with a second matching groove and a second matching protrusion matched with each other.

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