Injection mechanism of rubber machine and rubber machine

Abstract

The utility model discloses a rubber machine and an injection mechanism thereof, the rubber machine comprises the injection mechanism of the rubber machine, the injection mechanism of the rubber machine comprises: a plasticizing assembly comprising a plasticizing charging barrel and a screw rod, the screw rod melts and feeds a molding material in the plasticizing charging barrel; the injection assembly comprises an injection charging barrel, a plunger and a nozzle body, the plunger is movably arranged in the injection charging barrel, the plasticizing charging barrel and the injection charging barrel are perpendicular to each other and are communicated with each other, the molding material in the plasticizing charging barrel is fed into the injection charging barrel, and the plunger feeds the molding material in the injection charging barrel to the nozzle body; a feeding hole is formed in the injection charging barrel, the plasticizing charging barrel is communicated with the injection charging barrel through the feeding hole, the feeding hole is formed in the front end of the injection charging barrel, and the nozzle body is arranged at the front end of the injection charging barrel; the nozzle body is provided with an input port communicated with the injection charging barrel. And when the input port is closed by the plunger, the feeding port is partially shielded by the plunger. The utility model aims to reduce the occupied use area, improve the movement stability and improve the operation safety.

Description

Technical Field

[0001] The utility model relates to the technical field of mold manufacturing, and particularly relates to an injection mechanism of a rubber machine and a rubber machine. Background Art

[0002] At present, in the rubber market, an injection barrel and a plasticizing barrel are respectively connected to a central connecting body, resulting in an additional runner in this part. The runner has a one-way cavity in the check valve, and the rubber material in the runner is under injection pressure all the time, which has a serious impact on the characteristics of the rubber material when forming thermosensitive rubber. Summary of the Utility Model

[0003] The main purpose of the utility model is to propose an injection mechanism of a rubber machine and a rubber machine, aiming to have little impact on the characteristics of the rubber material when forming thermosensitive rubber.

[0004] To achieve the above purpose, an injection mechanism of a rubber machine proposed by the utility model includes:

[0005] A plasticizing component, including a plasticizing barrel and a screw, the screw melting and feeding the molding material into the plasticizing barrel;

[0006] An injection component, including an injection barrel, a plunger and a nozzle body, the plunger is movably arranged in the injection barrel, the plasticizing barrel is perpendicular to and communicated with the injection barrel, the molding material in the plasticizing barrel is fed into the injection barrel, and the plunger feeds the molding material in the injection barrel to the nozzle body;

[0007] The injection barrel forms a feed port, the plasticizing barrel is communicated with the injection barrel through the feed port, the feed port is located at the front end of the injection barrel, and the nozzle body is arranged at the front end of the injection barrel;

[0008] The nozzle body has an input port communicated with the injection barrel. When the plunger closes the input port, the plunger partially blocks the feed port.

[0009] In an embodiment, the injection barrel is provided with a first injection cavity, the circumferential side wall of the first injection cavity is provided with the feed port, the nozzle body is provided with a second injection cavity communicated with the first injection cavity, the first injection cavity is communicated with the feed port, and the inner diameter of the first injection cavity is larger than the inner diameter of the second injection cavity.

[0010] In an embodiment, the plunger includes a cylindrical section and a conical section, the cylindrical section is slidably installed in the first injection cavity, the conical section is arranged at one end of the cylindrical section close to the nozzle body, the input port is communicated with the first injection cavity, and the cylindrical section slides axially in the first injection cavity to drive the conical section to open or close the input port.

[0011] In one embodiment, when the conical section closes the input port, the cylindrical section partially blocks the feed port.

[0012] In one embodiment, when the conical section closes the input port, the connection line between the cylindrical section and the conical section coincides with the central axis of the feed port.

[0013] In one embodiment, the injection mechanism of the rubber machine further includes a check member. One end of the check member is connected to the feed port, and the other end of the check member is connected to the plasticizing assembly. The check member is used to prevent the material in the first injection cavity from flowing back into the plasticizing barrel through the feed port.

[0014] In one embodiment, the check member is a backflow prevention valve.

[0015] In one embodiment, the injection mechanism of the rubber machine further includes a driving device, which is used to drive the plunger to reciprocate in the first injection cavity.

[0016] The present utility model further includes a rubber machine, which includes the injection mechanism of the rubber machine described above. The injection mechanism of the rubber machine includes a plasticizing assembly, which includes a plasticizing barrel and a screw. The screw melts and feeds the molding material into the plasticizing barrel; an injection assembly, which includes an injection barrel, a plunger and a nozzle body. The plunger is movably arranged in the injection barrel. The plasticizing barrel is perpendicular to and communicates with the injection barrel. The molding material in the plasticizing barrel is fed into the injection barrel. The plunger feeds the molding material in the injection barrel to the nozzle body; the injection barrel forms a feed port, and the plasticizing barrel communicates with the injection barrel through the feed port. The feed port is located at the front end of the injection barrel, and the nozzle body is arranged at the front end of the injection barrel.

[0017] The solution of the present utility model discloses an injection mechanism of a rubber machine. By integrating the plasticizing assembly and the plasticizing assembly in the same injection barrel system, the equipment structure is simplified, and the overall compactness and integration degree are improved. In the design, the smooth connection between the storage cavity and the feed port ensures continuous and efficient feeding; the controllable movement of the injection piston realizes precise pushing of the material, ensuring uniform plasticization and accurate metering; the plasticizing assembly is located at the feed port, and the arrangement at the front end of the plasticizing assembly accelerates the heating and initial plasticization process of the raw material, improving the thermal efficiency and product quality. Description of the Drawings

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0019] Figure 1 Structural schematic diagram of an embodiment of the injection mechanism of a rubber machine provided by the present invention;

[0020] Figure 2 For Figure 1 Cross-sectional view A-A of

[0021] Explanation of the reference numerals in the drawings:

[0022] 10. Plasticizing component; 11. Plasticizing barrel; 12. Screw; 20. Injection component; 21. Injection barrel; 211. First injection cavity; 22. Plunger; 221. Cylindrical section; 222. Conical section; 23. Nozzle body; 231. Second injection cavity; 24. Feed port; 30. Check valve.

[0023] The realization, functional characteristics and advantages of the object of the present invention will be further described in conjunction with the embodiments with reference to the drawings. Detailed implementation manners

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0025] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0026] In addition, if descriptions such as "first", "second", etc. are involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes scenario A, or scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0027] The present utility model provides an injection mechanism for a rubber machine.

[0028] Please refer to Figures 1 to 2 , in an embodiment of the present utility model, an injection mechanism for a rubber machine includes:

[0029] A plasticizing assembly 10, including a plasticizing barrel 11 and a screw 12, wherein the screw 12 melts and feeds the molding material into the plasticizing barrel 11;

[0030] An injection assembly 20, including an injection barrel 21, a plunger 22 and a nozzle body 23, wherein the plunger 22 is movably disposed in the injection barrel 21, the plasticizing barrel 11 is perpendicular to and communicates with the injection barrel 21, the molding material in the plasticizing barrel 11 is fed into the injection barrel 21, and the plunger 22 feeds the molding material in the injection barrel 21 to the nozzle body 23;

[0031] The injection barrel 21 forms a feed port 24, the plasticizing barrel 11 communicates with the injection barrel 21 through the feed port 24, the feed port 24 is located at the front end of the injection barrel 21, and the nozzle body 23 is disposed at the front end of the injection barrel 21;

[0032] The nozzle body 23 has an input port communicating with the injection barrel 11. When the plunger 22 closes the input port, the plunger 22 partially blocks the feed port.

[0033] The solution of the present utility model discloses an injection mechanism of a rubber machine. By integrating the plasticizing component 10 and the plasticizing mechanism 20 in the same injection barrel system, the equipment structure is simplified, and the overall compactness and integration degree are improved. Such a design is beneficial to optimizing space utilization, reducing losses during the raw material transportation process, and may simplify the installation and operation processes. In this solution, the design of the connection between the plasticizing barrel 11 and the feed inlet 24 ensures that the raw materials can smoothly enter the feed inlet 24 from the plasticizing barrel 11, facilitating continuous feeding and storage, and improving production continuity and efficiency. And the design that the feed inlet 24 is located at the front end of the injection barrel 21 makes the material flow path more direct, reduces dead angles and material retention problems during the injection process, is beneficial to improving production efficiency and reducing material waste. Moreover, the plasticizing barrel 11 and the injection barrel 21 are vertically arranged and directly connected, which simplifies the material transfer process, reduces heat loss and degradation risk during the material transfer process, and improves the feeding efficiency and the quality of the molded material. The plunger 22 can move within the injection barrel 21, which allows precise control of the advancement amount and speed of the material, and is crucial for ensuring uniform heating of the material, sufficient plasticization, and precise metering and injection into the mold. In addition, the design of the movable plunger 22 also facilitates cleaning and maintenance of the inside of the barrel, and improves production efficiency and product quality. The design of the screw 12 is not only used for storing materials, but more importantly, it has the ability to efficiently melt and uniformly mix the molded materials. This ensures that the materials reach an ideal plasticized state before entering the injection process, which is crucial for the physical properties and appearance quality of the products. The nozzle body 23 is directly arranged at the front end of the injection barrel 21, such a design helps to reduce the cooling of the material before injecting into the mold, ensures good fluidity of the material, and can more effectively control the injection pressure and speed, which is particularly suitable for application scenarios that require high-precision injection molding. When the plunger 22 partially or completely covers the feed inlet, it can effectively prevent the backflow and leakage of the melt, reduce raw material waste, and improve the efficiency and economy of injection molding.

[0034] Please refer to Figures 1 to 2 , in an embodiment of the present utility model, the injection barrel 21 is provided with the first injection cavity 211, the circumferential side wall of the first injection cavity 211 is provided with the feed inlet 24, the nozzle body 23 is provided with a second injection cavity 231 communicated with the first injection cavity 211, the first injection cavity 211 is communicated with the feed inlet 24, and the inner diameter of the first injection cavity 211 is larger than the inner diameter of the second injection cavity 231.

[0035] The reduction in the inner diameter of the first injection cavity 211 means that when the same volume of plastic melt passes through, its flow cross-sectional area decreases. According to the principle of fluid mechanics, this will lead to an increase in injection pressure. The increased pressure helps the plastic melt to fill the fine parts of the mold more effectively, which is particularly crucial for the molding of complex-shaped and thin-walled products, thereby improving the molding accuracy and surface quality. The relatively thin design of the second injection cavity 231 can reduce the contact area between the plastic melt and the outside world, reduce heat dissipation, and keep the temperature of the melt more stable during injection, which is particularly important for heat-sensitive materials and helps to maintain a good plasticized state until molding is completed. The relatively small opening of the second injection cavity 231 can serve as a filtering barrier to block larger foreign objects or incompletely melted particles from entering the mold, protect the mold from damage, and also help to keep the mold clean and extend the service life of the mold. Side feeding allows the material to flow directly downward along the barrel wall after entering the injection barrel 21, reducing the accumulation of material at the feeding port and the possible generation of shear heat, which is particularly important for heat-sensitive materials and can effectively prevent material degradation and maintain material properties. Moreover, the design of the side feeding port 24 can make the docking of the nozzle body 23 with the mold more flexible.

[0036] Please refer to Figures 1 to 2 , in an embodiment of the present invention, the plunger 22 includes a cylindrical section 221 and a conical section 222. The cylindrical section 221 is slidably installed in the first injection cavity 211. The conical section 222 is provided at one end of the cylindrical section 221 close to the nozzle body 23. The input port is communicated with the first injection cavity 211. The cylindrical section 221 slides axially in the first injection cavity 211 to drive the conical section 222 to open or close the input port.

[0037] Through the cooperation of the conical section 222 and the nozzle body 23, the dynamic regulation of the melt flow rate is achieved. When the cylindrical section 221 slides axially along the storage cavity, it drives the conical section 222 to move, and can gradually open or close the input port of the nozzle body 23. This design allows for more precise control of the injection rate and pressure of the melt during the injection process, provides better control for different filling stages (such as slow filling, accelerated filling, and pressure holding), and helps improve the quality and consistency of the product. The conical design of the conical section 222 generates a certain shearing effect on the melt during the injection process, which helps improve the plasticization uniformity of the melt. Especially during the process of gradually opening the conical section 222, it can effectively reduce the vortex flow inside the melt, avoid the formation of air entrapment and weld lines, thereby improving the surface finish and the tightness of the internal structure of the product. The design of the conical section 222 enhances the sealing effect in the area of the nozzle body 23. Especially at the beginning and end of the injection process, when the conical section 222 partially or completely covers the input port of the nozzle body 23, it can effectively prevent the backflow and leakage of the melt, reduce raw material waste, and at the same time improve the efficiency and economy of injection molding. This design works in cooperation with two different parts (the cylindrical section 221 and the conical section 222) of a single piston, replacing multiple independent components (such as separate valves or pistons) that may be required in traditional designs, simplifies the structure of the injection system, reduces the complexity of assembly and maintenance, and may reduce potential failure points, improving the reliability and lifespan of the equipment.

[0038] Please refer to Figures 1 to 2 , in an embodiment of the present utility model, when the conical section 222 closes the input port, the cylindrical section 221 partially blocks the feed port 24. Upward, the abutting part blocks.

[0039] When the conical section 222 closes the input port of the nozzle body 23, its cylindrical section 221 blocks the feed port 24. Such a design helps better control the raw material flow during specific stages of the injection process (such as the pressure holding stage), reduces the entry of additional raw materials into the storage cavity, ensures that the melt injected into the mold is fully pressure-held, and improves the density and quality of the product. By blocking the feed port 24 with the cylindrical section 221, it can effectively reduce the cold material newly entering the first injection cavity 211 from directly participating in the current cycle of injection, avoiding the influence on the temperature uniformity and fluidity of the melt due to the direct mixing of cold material, which is particularly important for high-performance plastic materials that require precise temperature control. By partially blocking the feed port 24 with the cylindrical section 221, the supply speed and amount of raw materials can be indirectly controlled, avoiding unnecessary continuous heating and mixing of raw materials, thereby reducing energy consumption to a certain extent and improving the efficiency of the production process.

[0040] Please refer to Figures 1 to 2, in an embodiment of the present utility model, when the conical section 222 closes the input port, the connecting line of the cylindrical section 221 and the conical section 222 coincides with the central axis of the feed port 24.

[0041] Such a design allows adjusting the feeding speed without completely cutting off the raw material supply, achieving fine-tuning of the raw material flow. Especially in the final stage of the injection process, it can effectively control the inflow of the remaining raw materials, reduce overfilling or air shot phenomena, and improve the molding accuracy. When the connecting line of the cylindrical section 221 and the conical section 222 coincides with the central axis of the feed port 24, the influence of the injection pressure is reduced, and the deformation of the rubber material less than 1 / 400 of the injection volume at this position is reduced, thereby improving the injection accuracy. It can also allow the melt in the storage cavity to have more time to maintain or adjust to the ideal temperature and pressure state before flowing to the nozzle body 24, which helps the melt to maintain uniform physical properties during injection, reduces internal stress and deformation caused by uneven temperature, and improves the quality and stability of the product.

[0042] Please refer to Figures 1 to 2 , in an embodiment of the present utility model, the injection mechanism of the rubber machine further includes a check member 30. One end of the check member 30 is connected to the feed port 24, and the other end of the check member 30 is connected to the plasticizing assembly 30. The check member 30 is used to prevent the material in the first injection cavity 221 from flowing back from the feed port 24 to the plasticizing barrel 11.

[0043] Adding the design of the check member 30 is the most direct improvement, which effectively solves the problem of reverse flow that may occur during the injection process or due to pressure fluctuations. Reverse flow may not only cause internal pollution of the plasticizing mechanism, affecting its long-term operation stability and lifespan, but also result in raw material waste and unstable quality of the molded product. The setting of the check member 30 ensures that the material in the plasticizing barrel 11 can only flow unidirectionally to the first injection cavity 211, avoiding the occurrence of reverse flow. The check member 30 serves as a barrier to protect the plasticizing assembly 10 from the intrusion of cold materials or impurities that are not fully plasticized, which is crucial for maintaining the plasticizing quality. The precision components such as the heating elements and screws inside the plasticizing mechanism can be kept clean and operate efficiently, reducing the maintenance frequency and extending the service life of the equipment.

[0044] Please refer to Figures 1 to 2 , in an embodiment of the present utility model, the check member 30 is a backflow prevention valve.

[0045] The backflow prevention valve is a component specifically designed for unidirectional flow control, which can ensure that the material only moves in one direction (i.e., from the storage cavity to the plasticizing mechanism) and will not flow back to the feed port or the inside of the plasticizing mechanism. This precise control ability improves the stability and reliability of the injection molding process. The backflow prevention valve can be a check valve, a one-way valve, a reflux valve or a back pressure valve.

[0046] Please refer to Figures 1 to 2 In an embodiment of the present utility model, the injection mechanism of the rubber machine further includes a driving device for driving the plunger 22 to reciprocate in the first injection cavity 221.

[0047] By adding the driving device, the automatic control of the reciprocating movement of the plunger 22 in the first injection cavity 221 is realized. Compared with the traditional manual or mechanical linkage methods, this improves the accuracy and efficiency of the injection molding process. The driving device can be of different types such as electric, hydraulic or pneumatic, and is flexibly selected according to the characteristics of different plastic materials and processing requirements, increasing the adaptability and processing range of the equipment.

[0048] The present utility model also relates to a rubber machine, the rubber machine includes the above injection mechanism, the injection mechanism of the rubber machine includes a plasticizing assembly 10, the plasticizing assembly 10 includes a plasticizing barrel 11 and a screw 12, the screw 12 melts and feeds the molding material into the plasticizing barrel 11; an injection assembly 20, including an injection barrel 21, a plunger 22 and a nozzle body 23, the plunger 22 is movably arranged in the injection barrel 21, the plasticizing barrel 11 is perpendicular to and communicates with the injection barrel 21, the molding material in the plasticizing barrel 11 is fed into the injection barrel 21, and the plunger 22 feeds the molding material in the injection barrel 21 to the nozzle body 23; the injection barrel 21 forms a feed port 24, the plasticizing barrel 11 communicates with the injection barrel 21 through the feed port 24, the feed port 24 is located at the front end of the injection barrel 21, and the nozzle body 23 is arranged at the front end of the injection barrel 21.

[0049] The present utility model also proposes a rubber machine, which adopts all the technical solutions of all the above embodiments, so it also has all the beneficial effects brought by the technical solutions of the above embodiments, and will not be elaborated here one by one.

[0050] The above is only an exemplary embodiment of the present utility model, and does not limit the patent scope of the present utility model. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present utility model.

Claims

1. An injection mechanism of a rubber machine, characterized in that, Comprising: A plasticizing component, including a plasticizing barrel and a screw, the screw feeding molding material into the plasticizing barrel; An injection component, including an injection barrel, a plunger and a nozzle body, the plunger being movably disposed within the injection barrel, the plasticizing barrel being perpendicular to and communicating with the injection barrel, the molding material within the plasticizing barrel feeding into the injection barrel, the plunger feeding the molding material within the injection barrel towards the nozzle body; The injection barrel forms a feed port, the plasticizing barrel communicating with the injection barrel through the feed port, the feed port being located at the front end of the injection barrel, the nozzle body being disposed at the front end of the injection barrel; The nozzle body has an input port communicating with the injection barrel, when the plunger closes the input port, the plunger partially shields the feed port.

2. The injection mechanism of the rubber machine according to claim 1, characterized in that, The injection barrel is provided with a first injection cavity, the circumferential side wall of the first injection cavity is provided with the feed port, the nozzle body is provided with a second injection cavity communicating with the first injection cavity, the first injection cavity communicating with the feed port, the inner diameter of the first injection cavity being greater than the inner diameter of the second injection cavity.

3. The injection mechanism of the rubber machine according to claim 2, characterized in that, The plunger includes a cylindrical section and a conical section, the cylindrical section being slidably mounted within the first injection cavity, the conical section being disposed at one end of the cylindrical section close to the nozzle body, the input port communicating with the first injection cavity, the cylindrical section sliding axially within the first injection cavity, the conical section opening or closing the input port.

4. The injection mechanism of the rubber machine according to claim 3, characterized in that, When the conical section closes the input port, the cylindrical section partially shields the feed port.

5. The injection mechanism of the rubber machine according to claim 3, characterized in that, When the conical section closes the input port, the connecting line of the cylindrical section and the conical section coincides with the central axis of the feed port.

6. The injection mechanism of the rubber machine according to claim 2, wherein, The injection mechanism of the rubber machine further includes a check member, one end of the check member being connected to the feed port, the other end of the check member being connected to the plasticizing component, the check member being used to prevent the material within the first injection cavity from flowing back into the plasticizing barrel through the feed port.

7. The injection mechanism of the rubber machine according to claim 6, characterized in that, The check member is a backflow prevention valve.

8. The injection mechanism of the rubber machine according to claim 2, characterized in that, The injection mechanism of the rubber machine further includes a driving device, the driving device being used to drive the plunger to reciprocate within the first injection cavity.

9. A rubber machine, characterized in that, The rubber machine includes the injection mechanism of the rubber machine according to any one of claims 1 to 8.

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