Injection feeding device

Abstract

This application discloses an injection feeding device. By integrating a material conveying component and an injection component on the same main body, and arranging the material conveying component and the injection component at intervals in the vertical direction and extending parallel to each other in the first direction, and using relatively independent first and second drive units to drive and control the spiral feeding component and the pushing component respectively, the overall structure realizes the functional division and coordination of material conveying and injection output, enabling the material to complete the continuous transition from conveying to injection within the device, thereby effectively reducing the mutual interference between the material conveying process and the injection process, and improving the stability of the material in the feeding, transition and output processes.

Description

Technical Field

[0001] This application relates to the field of material injection feeding technology, and in particular to an injection feeding device. Background Technology

[0002] In the processing and quantitative output of high-viscosity materials, pastes, molten materials, or semi-fluid materials, it is usually necessary to first convey the material, and then further advance the conveyed material and output it from the discharge end. Therefore, the relevant equipment often undertakes both feeding and injection functions simultaneously. With the increasing demand for equipment integration, miniaturization, and continuous operation, how to balance material conveying and injection output in the same device has become an important direction in the design of such equipment.

[0003] While existing injection feeding equipment can deliver and output materials, in practice, the material conveying process and the injection process often lack good coordination. In existing technologies, when materials move from the conveying stage to the injection stage, the pre-feeding state, the material state in the transition section, and the subsequent propulsion and output state are prone to mutual interference, making it difficult for the device to maintain a stable material transfer relationship and output rhythm during continuous operation.

[0004] Therefore, in existing technologies, the coordination between the material conveying process and the injection process within the same device is insufficient, resulting in poor stability of the material during the transition from conveying to injection, which in turn affects the continuity, stability, and output consistency of the injection feeding process. Therefore, there is an urgent need for an injection feeding device that can balance material conveying and injection in its overall structure and improve the stability of their coordination. Summary of the Invention

[0005] This application aims to solve the technical problem that the coordination between the material conveying process and the injection process in existing injection feeding devices is insufficient, resulting in poor stability of the material during the transition from conveying to injection output, thereby affecting the continuity of material supply and the consistency of injection.

[0006] To solve the above problems, this application adopts the following technical solution: An injection feeding device includes a base and a main body mounted on the base; the main body is provided with a feeding assembly and an injection assembly, the feeding assembly and the injection assembly are spaced apart in the vertical direction and extend parallel to each other in a first direction; The feeding assembly includes a feeding cylinder and a spiral feeding member disposed therein and extending in a first direction. The injection assembly includes a discharge cylinder and a pushing member disposed therein. The output end of the feeding cylinder is connected to the inlet end of the discharge cylinder through an adapter. A one-way check valve is provided in the adapter. The main body is provided with a drive assembly, which includes a first drive unit and a second drive unit that are respectively connected to the spiral feeder and the pusher, and the first drive unit and the second drive unit are arranged relatively independently.

[0007] Furthermore, a circular groove is provided on the outer side of the feeding cylinder, and a first limiting ring is fixedly provided on the inner side of the main body. The first limiting ring is embedded in the circular groove to restrict the circumferential rotation of the feeding cylinder, and the groove depth of the circular groove is adapted to the thickness of the first limiting ring. The feeding cylinder achieves radial positioning with the main body through the cooperation of the circular groove and the first limiting ring.

[0008] Furthermore, the first drive unit includes a first drive component and a transmission shaft. The transmission shaft is rotatably mounted via a bearing. One end of the transmission shaft is connected to the output end of the first drive component via a key to achieve torque transmission, and the other end extends into the feed cylinder and is coaxially fixed to the end of the screw feeder.

[0009] Furthermore, the adapter is connected to the discharge cylinder via a connecting seat, and a connecting channel is formed inside the connecting seat along the second direction. The connecting channel is connected to the interior of the discharge cylinder via the one-way check valve assembly.

[0010] Furthermore, the one-way check valve assembly includes a check valve seat, a spherical check valve movably disposed within the check valve seat, and a limiting rod disposed on one side of the check valve seat. The end of the check valve seat facing the feed cylinder is connected to the output end of the feed cylinder, and the end facing the discharge cylinder is connected to the connecting seat.

[0011] Furthermore, it also includes a nozzle, which is detachably connected to the output end of the discharge cylinder, and the nozzle is provided with a guide channel whose cross-sectional area gradually decreases along the material flow direction.

[0012] Furthermore, the pusher includes a pusher rod and a frustum-shaped pusher head disposed at the front end of the pusher rod. The guide channel of the nozzle forms a tapered fitting section corresponding to the frustum-shaped pusher head at one end near the pusher rod. During the push-forward process, the frustum-shaped pusher head can axially enter the tapered fitting section and form a surface fit with the inner wall of the tapered fitting section.

[0013] Furthermore, the output shaft of the second drive unit drives the pusher to move back and forth in the discharge cylinder through a connector, wherein the output shaft is parallel to the pusher.

[0014] Furthermore, the second drive unit is mounted on the slide adapter plate, the slide adapter plate is connected to the slide, and the slide is slidably engaged with the guide rail fixed on the base, so that the second drive unit moves stably along the first direction and drives the output shaft to perform linear reciprocating motion.

[0015] Furthermore, the injection assembly also includes a linkage component, which extends along a first direction. One end of the linkage component is connected to the connector through a bushing and a connecting sleeve. The pusher extends into the other end of the linkage component and is circumferentially fixed to the linkage component through a keyway structure.

[0016] Compared with the prior art, this application has the following beneficial effects: This application integrates a material conveying component and an injection component on the same main body, with the material conveying component and the injection component spaced vertically and extending parallel to each other in a first direction. Simultaneously, it employs relatively independent first and second drive units to control the transmission of the screw feeder and pusher components. This overall structure achieves functional division and coordinated operation between material conveying and injection output, enabling the material to complete a continuous transition from conveying to injection within the device. This effectively reduces mutual interference between the material conveying and injection processes, improving the stability of the material during feeding, transition, and output. Furthermore, the interconnected arrangement between the conveying cylinder, the adapter, and the discharge cylinder makes the material transfer path more compact and smooth, improving the continuity, stability, and output consistency of the overall device operation, thereby enhancing the applicability and reliability of the injection feeding device in integrated working mode. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application 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 this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] The structures, proportions, sizes, etc., shown in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this application. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0019] Figure 1 This is a schematic diagram of the overall structure of the injection feeding device of this application; Figure 2This is a partial structural schematic diagram of the injection feeding device of this application; Figure 3 This is a schematic diagram of the overall front view of the injection feeding device of this application; Figure 4 This is a cross-sectional structural schematic diagram of the injection feeding device of this application; Figure 5 for Figure 4 Enlarged view of part A in the image; Figure 6 for Figure 4 Enlarged view of part B in the image; Figure 7 This is a cross-sectional structural diagram of the injection feeding device of this application from another direction.

[0020] Illustration: 1. Base; 11. Feed inlet; 2. Main body; 21. First limiting ring; 3. Conveying assembly; 31. Conveying cylinder; 311. Circular groove; 32. Spiral feeder; 4. Injection assembly; 41. Discharge cylinder; 42. Pusher; 421. Push rod; 422. Frustum-shaped pusher head; 43. Nozzle; 431. Guide channel; 432. Conical section; 44. Linkage component; 5. Adapter; 51. Connecting seat; 6. One-way stop 61. Check valve; 62. Spherical check valve; 63. Limiting rod; 7. Drive assembly; 71. First drive unit; 711. First drive component; 712. Drive shaft; 713. Bearing; 72. Second drive unit; 721. Output shaft; 722. Connecting component; 723. Slide adapter plate; 724. Slide; 725. Guide rail; 726. Bushing; 727. Connecting sleeve; 8. Cut-off valve; 9. Third drive component. Detailed Implementation

[0021] To make the inventive objectives, features, and advantages of this application more apparent and understandable, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] In the description of this application, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component centrally located at the same time.

[0023] The technical solution of this application will be further described below with reference to the accompanying drawings and specific embodiments.

[0024] refer to Figures 1 to 7 This application provides an injection feeding device, including a base 1 and a main body 2 mounted on the base 1; the main body 2 is provided with a feeding assembly 3 and an injection assembly 4, the feeding assembly 3 and the injection assembly 4 are spaced apart in the vertical direction and extend parallel to each other in a first direction; the feeding assembly 3 includes a feeding cylinder 31 and a spiral feeding member 32 disposed therein and extending in the first direction, the injection assembly 4 includes a discharge cylinder 41 and a pusher member 42 disposed therein, the output end of the feeding cylinder 31 is connected to the inlet end of the discharge cylinder 41 through an adapter 5, and a one-way check valve 6 is disposed in the adapter 5; the main body 2 is provided with a driving assembly 7, the driving assembly 7 includes a first driving unit 71 and a second driving unit 72 respectively connected to the spiral feeding member 32 and the pusher member 42, and the first driving unit 71 and the second driving unit 72 are disposed relatively independently.

[0025] In this embodiment, the injection feeding device includes a base 1 and a main body 2 mounted on the base 1. The base 1 provides the installation foundation and load-bearing support for the entire mechanism. The main body 2 supports the conveying assembly 3, the injection assembly 4, and the corresponding drive assembly 7. The main body 2 is mounted above the base 1. The conveying assembly 3 and the injection assembly 4 are both arranged on the main body 2, forming a layered and mutually cooperating layout around the main body 2. This allows for the integration of conveying and injection functions within a limited space, which helps to shorten the material transfer path and improve the compactness and stability of the overall structure. The main body 2 is equipped with the conveying assembly 3 and the injection assembly 4, which are arranged in parallel layers in space. The upper conveying assembly 3 mainly undertakes the function of conveying the preceding material, while the lower injection assembly 4 mainly undertakes the function of propelling and outputting the following material. Since the two extend parallel to each other along a first direction, it is beneficial for the material to flow gradually in a predetermined direction inside the entire machine, and it is also beneficial for the installation, calibration, and transmission matching of the two mechanisms on the same main body 2. Compared with structures that are staggered or have many spatial twists, this layered and parallel arrangement can reduce the flow instability caused by complex bends. It also facilitates the support and guidance of each component within a limited assembly space. Therefore, while maintaining the overall compact structure, it can also take into account the continuous connection between the material conveying process and the injection process, thus demonstrating good engineering applicability.

[0026] Furthermore, the material conveying assembly 3 includes a material conveying cylinder 31 and a spiral feeder 32 disposed therein and extending along a first direction. The material conveying cylinder 31 forms a material conveying channel, and the spiral feeder 32 is disposed inside the material conveying cylinder 31 and rotates along its own axis under the drive of the first drive unit 71, causing the material to move along the first direction toward the output end of the material conveying cylinder 31. The injection assembly 4 includes a discharge cylinder 41 and a pusher 42 disposed therein. The discharge cylinder 41 forms an injection output channel, and the pusher 42 moves axially back and forth within the discharge cylinder 41, thereby propelling and outputting the material entering the discharge cylinder 41. That is, the main function of the material conveying assembly 3 is to convey the material downstream, and the main function of the injection assembly 4 is to apply an axial pushing force to the material that has reached the injection area, so that it can be stably output through the front end structure. The material conveying assembly 3 and the injection assembly 4 perform functions at different stages and form an overall synergy through a unified installation system on the main body 2.

[0027] Furthermore, the adapter 5 is located between the conveying assembly 3 and the injection assembly 4, establishing a connection between the output end of the conveying cylinder 31 and the inlet end of the discharge cylinder 41, allowing the material conveyed upstream to enter the downstream injection area. The conveying assembly 3 and the injection assembly 4 are arranged vertically at intervals and form a transition structure through the adapter 5, making the material transfer from the conveying stage to the injection stage smoother. The one-way check valve assembly 6 is located inside the adapter 5, and its overall function is to control the flow direction of the material, making the material more inclined to flow from the conveying assembly 3 to the injection assembly 4. When the injection assembly 4 establishes a high propulsion pressure, it inhibits the backflow. When the upstream conveying pressure acts on the one-way check valve assembly 6, the check valve structure is in a passable state, and the material can cross the structure to enter the discharge cylinder 41 side; when a reverse pressure trend is formed in the downstream injection process, the one-way check valve assembly 6 acts as a blockage, thereby reducing the possibility of the material flowing back to the conveying side, making it easier for the material to maintain a stable state after entering the injection area, thus improving the stability and reliability of the injection feeding process.

[0028] In terms of drive, the first drive unit 71 is driven by the screw feeder 32 and is used to drive the screw feeder 32 to rotate inside the conveying cylinder 31, thereby completing the material conveying; the second drive unit 72 is driven by the pusher 42 and is used to drive the pusher 42 to move back and forth inside the discharge cylinder 41, thereby completing the injection propulsion. Since the first drive unit 71 and the second drive unit 72 are set relatively independently, the conveying action and the injection action can be started and stopped separately according to process requirements, or they can be coordinated with each other under a specific timing. The conveying process and the injection process are no longer passively switched through the same actuator, and can be independently adjusted according to their respective working characteristics, which helps to reduce the degree of action coupling between the two, thereby improving the transition stability of the material from conveying to injection inside the whole machine.

[0029] In one specific embodiment, material enters the conveying assembly 3 through the feed inlet 11. Under the action of the first drive unit 71, the screw feeder 32 rotates along the axis corresponding to the first direction, pushing the material toward the output end of the conveying cylinder 31. When the material reaches the output end of the conveying cylinder 31, it passes through the adapter 5 and its internal one-way check component 6 in sequence into the feeding area of ​​the discharge cylinder 41. Based on this, the second drive unit 72 drives the pusher 42 to move forward in the discharge cylinder 41, thereby applying a propulsive force to the material that has entered the injection area, causing the material to be output toward the front end. In this embodiment, the conveying assembly 3 is responsible for establishing a continuous feeding state, the injection assembly 4 is responsible for realizing the end-stage propulsion output, and the adapter 5 and one-way check component 6 are responsible for realizing the orderly connection and flow direction control between the two stages. This allows for both material conveying and injection output within the same device, effectively reducing the disturbance of the conveying action to the injection state and the reverse influence of the injection pressure on the conveying state, thereby improving the operational stability, output consistency, and applicability reliability of the entire device under continuous working conditions. Meanwhile, since the material conveying component 3 and the injection component 4 are arranged in layers along the vertical direction and extend parallel to each other along the first direction, the overall structure of the machine is more regular, which facilitates installation and maintenance, and also makes it easier to optimize the configuration of different functional parts according to specific application scenarios. Therefore, it has good engineering implementation value.

[0030] In one embodiment, a circular groove 311 is provided on the outer side of the feeding cylinder 31, and a first limiting ring 21 is fixedly provided on the inner side of the main body 2. The first limiting ring 21 is embedded in the circular groove 311 to restrict the circumferential rotation of the feeding cylinder 31, and the groove depth of the circular groove 311 is adapted to the thickness of the first limiting ring 21. The feeding cylinder 31 achieves radial positioning with the main body 2 through the cooperation of the circular groove 311 and the first limiting ring 21.

[0031] In this embodiment, the conveying cylinder 31 is fitted with the limiting part inside the main body 2 through the annular positioning structure formed on its outer periphery. When the conveying cylinder 31 is working, the spiral feeding component 32 inside it rotates continuously, and the material will also generate a certain reaction force on the cylinder. Through the fitting and cooperation between the outer periphery recess and the limiting structure inside the main body 2, on the one hand, the conveying cylinder 31 body can be restricted from rotating around its own axis, and on the other hand, a radial positioning reference can be directly established so that the conveying cylinder 31 is always kept in the predetermined installation position, ensuring the same conveying relationship between the spiral feeding component 32 and the subsequent transfer part, avoiding connection deviation caused by the change of posture of the conveying cylinder 31, thereby improving the assembly stability and working reliability of the whole device.

[0032] In one embodiment, the first drive unit 71 includes a first drive member 711 and a drive shaft 712. The drive shaft 712 is rotatably mounted via a bearing 713. One end of the drive shaft 712 is connected to the output end of the first drive member 711 via a key to achieve torque transmission, and the other end extends into the feed cylinder 31 and is coaxially fixed to the end of the spiral feeder 32.

[0033] In this embodiment, the first driving member 711 is located at one end of the transmission shaft 712. After the first driving member 711 outputs torque, the rotational motion is input to the transmission shaft 712 through the connection structure at this end. The other end of the transmission shaft 712 extends forward into the inside of the feed cylinder 31 and is coaxially fixed with the end of the screw feeder 32. The first driving member 711, the transmission shaft 712, and the screw feeder 32 form a continuous rotational chain in terms of power transmission. Since the transmission shaft 712 is rotatably mounted through the bearing 713, the bearing 713 provides radial support to the transmission shaft 712, preventing significant swaying of the transmission shaft 712 during rotation due to excessive cantilever length. This helps maintain the consistency between the axis of the transmission shaft 712 and the axis of the screw feeder 32. Furthermore, one end of the transmission shaft 712 is connected to the output end of the first driving member 711 through a key to achieve torque transmission. The key connection locks the two in the circumferential direction, ensuring that the rotation of the output end of the first driving member 711 can be reliably transmitted to the transmission shaft 712, while also facilitating assembly and disassembly. After the other end of the drive shaft 712 is coaxially fixed to the end of the screw feeder 32, when the first drive member 711 is activated, the drive shaft 712 drives the screw feeder 32 to rotate within the conveying cylinder 31. The screw feeder 32 can push the material within the conveying cylinder 31 along the first direction. In this embodiment, the drive shaft 712 is used to separate the first drive member 711 and the screw feeder 32, so that the first drive member 711 does not directly occupy the space at the end of the conveying cylinder 31. At the same time, the bearing 713 supports and ensures rotational accuracy, thereby making the rotation of the screw feeder 32 in the conveying cylinder 31 more stable and the conveying state more continuous. It is worth noting that the first drive member 711 can be different types such as a handwheel, cylinder, servo motor, or stepper motor, which can be selected according to the actual working conditions.

[0034] In one embodiment, the adapter 5 is connected to the discharge cylinder 41 via a connecting seat 51, and a connecting channel is formed inside the connecting seat 51 along a second direction. The connecting channel is connected to the interior of the discharge cylinder 41 via the one-way check valve assembly 6.

[0035] In this embodiment, the feeding cylinder 31 is located above the injection assembly 4, and the discharging cylinder 41 is located below it. Although they extend parallel to each other along the first direction, there is a height difference in space. Therefore, the material delivered from the output end of the feeding cylinder 31 cannot directly enter the discharging cylinder 41 along the first direction. The path is changed through the adapter 5 and the connecting seat 51. The connecting seat 51 is located in this changing area, with one side connected to the adapter 5 and the other side connected to the discharging cylinder 41. The internal connecting channel guides the material from the adapter 5 into the discharging cylinder 41. Since the one-way check valve assembly 6 is also arranged in this transition area, the internal channel of the connecting seat 51 also serves to reserve flow space for the opening and closing action of the one-way check valve assembly 6. The connecting channel is connected to the interior of the discharging cylinder 41 through the one-way check valve assembly 6. That is, the connecting seat 51 serves as a geometric transition and a functional interface, organizing the upstream feeding path and the downstream injection path in the same transition area. It is worth noting that the first direction and the second direction are relatively perpendicular.

[0036] In one embodiment, the one-way check valve assembly 6 includes a check valve seat 61, a spherical check valve 62 movably disposed within the check valve seat 61, and a limiting rod 63 disposed on one side of the check valve seat 61. The end of the check valve seat 61 facing the feed cylinder 31 is connected to the output end of the feed cylinder 31, and the end facing the discharge cylinder 41 is connected to the connecting seat 51.

[0037] In this embodiment, the end of the check seat 61 facing the feed cylinder 31 is connected to the output end of the feed cylinder 31. The material delivered from the feed cylinder 31 first enters the inlet area corresponding to the check seat 61, and the end of the check seat 61 facing the discharge cylinder 41 is connected to the connecting seat 51. That is, after the spherical check member 62 passes its closed position, the material can enter the connecting channel inside the connecting seat 51 and then enter the discharge cylinder 41. When the spherical check member 62 is located inside the check seat 61, it can be pushed open in the conveying direction or returned to the closed position under reverse pressure. The limiting rod 63 is provided on one side of the check seat 61. Its function is to prevent the spherical check member 62 from moving too far when it is open, so as to ensure that the spherical check member 62 is always in the resettable working range. In this embodiment, the check seat 61 provides a channel and a valve port, the spherical check member 62 serves as an opening and closing element, and the limiting rod 63 serves as a stroke limiting element, forming a unidirectional structure that only allows material to flow preferentially towards the discharge cylinder 41. When the feeding assembly 3 is working, the material from the output end of the feeding cylinder 31 pushes the spherical check valve 62 away from the valve port, and the material enters the connecting seat 51 through the check valve seat 61. When the pressure in the injection assembly 4 attempts to be transmitted in the reverse direction, the spherical check valve 62 moves back to the vicinity of the valve port, forming a tendency to close the reverse flow channel. Since the contact position between the spherical check valve 62 and the check valve seat 61 is naturally located in the middle of the flow channel, this structure can achieve flow direction control in a small space, and together with the connecting seat 51 and the adapter 5, it forms a controlled interface between the feeding assembly 3 and the injection assembly 4.

[0038] In one embodiment, the device further includes a nozzle 43, which is detachably connected to the output end of the discharge cylinder 41. The nozzle 43 has a guide channel 431 with a gradually decreasing cross-sectional area along the material flow direction.

[0039] In this embodiment, the nozzle 43 is an independent front-end component installed on the front side of the discharge cylinder 41, which can be removed for replacement, cleaning, or maintenance when needed. A flow guide channel 431 is formed inside the nozzle 43, and the cross-sectional area of ​​this channel gradually decreases along the material flow direction. This means that after the material enters the nozzle 43 from the discharge cylinder 41, it does not travel within a channel of uniform cross-section, but gradually enters a smaller flow area. The interior of the nozzle 43 actually forms a gradually converging flow guide space. Since the pusher 42 is located inside the discharge cylinder 41, its forward movement pushes the material in the discharge cylinder 41 towards the nozzle 43. Therefore, the flow guide channel 431 of the nozzle 43 determines the pressure and guiding state of the material at the end. As the cross-sectional area of ​​the flow guide channel 431 gradually decreases, the material is gradually concentrated in the area near the output end, making the material flow more converging and the discharge direction at the end more clearly defined. The nozzle 43 is located at the front end of the discharge cylinder 41 and its detachable connection with the discharge cylinder 41 allows the nozzle 43 to be used as a fixed discharge end, or to be replaced with nozzles 43 of different structural sizes according to different working conditions, without having to modify the main body of the discharge cylinder 41.

[0040] In one embodiment, the pusher 42 includes a pusher rod 421 and a frustum-shaped pusher head 422 disposed at the front end of the pusher rod 421. The guide channel 431 of the nozzle 43 forms a tapered fitting section 432 corresponding to the frustum-shaped pusher head 422 at one end near the pusher rod 421. During the pushing process, the frustum-shaped pusher head 422 can axially enter the tapered fitting section 432 and form a surface fit with the inner wall of the tapered fitting section 432.

[0041] In this embodiment, the pusher 42 includes a pusher rod 421 and a frustum-shaped pusher head 422 disposed at the front end of the pusher rod 421. The pusher rod 421 is the main force-bearing part extending along a first direction, and the frustum-shaped pusher head 422 is located at the foremost end of the pusher rod 421 and extends toward the nozzle 43. The guide channel 431 of the nozzle 43 forms a tapered fitting section 432 at one end near the pusher rod 421, that is, the rear part of the nozzle 43 forms an inner conical region that matches the outer contour of the frustum-shaped pusher head 422. When the pusher 42 advances forward, the pusher rod 421 drives the frustum-shaped pusher head 422 to move toward the nozzle 43, and the frustum-shaped pusher head 422 can enter the tapered fitting section 432 axially and form a surface fit with its inner wall. Surface fit refers to a close contact relationship with a large area within the conical surface. When the front pusher 42 approaches its front limit position, the remaining space behind the nozzle 43 will further shrink as the frustum-shaped pusher head 422 enters, thus continuing to squeeze the material behind the nozzle 43 forward. The conical fit section 432 of the nozzle 43 and the frustum-shaped pusher head 422 form a front compression zone that gradually approaches zero margin, which can reduce the residual volume that ordinary flat-head pushers 42 tend to leave at the inlet of the nozzle 43. At the same time, since the frustum-shaped pusher head 422 is guided by the inner wall of the conical fit section 432 when it enters the nozzle 43, the front end of the pusher 42 is less likely to deviate laterally when it approaches the nozzle 43, which also helps to maintain the stability of the front fit.

[0042] In one embodiment, the output shaft 721 of the second drive unit 72 drives the pusher 42 to move back and forth in the discharge cylinder 41 through the connector 722, wherein the output shaft 721 and the pusher 42 are relatively parallel.

[0043] In this embodiment, the output shaft 721 of the second drive unit 72 is not arranged on the same axis as the pusher 42. The pusher 42 moves back and forth within the discharge cylinder 41 via the connector 722, and the output shaft 721 is relatively parallel to the pusher 42. The output shaft 721 and the pusher 42 are two components extending along a first direction, moving in the same direction but spatially separated. The connector 722 is located between the output shaft 721 and the pusher 42, with one end connected to the output shaft 721 and the other end connected to the pusher 42, thereby transmitting the driving force generated by the second drive unit 72 to the pusher 42. In operation, the second drive unit 72 pushes the output shaft 721 back and forth, and the output shaft 721 then synchronously drives the pusher 42 to move axially along the discharge cylinder 41 via the connector 722. Since the output shaft 721 and the pusher 42 are relatively parallel, the connector 722 acts as a lateral bridging element, without needing to overlap with the pusher 42 and occupy the same centerline position. With this structure, the interior of the discharge cylinder 41 can be completely reserved for the use of the pusher 42 and the material channel. The output shaft 721 is located on both sides of the main body 2 in a relatively independent position, which facilitates connection with the second drive unit 72 at the rear.

[0044] In one embodiment, the second drive unit 72 is mounted on a slide adapter plate 723, the slide adapter plate 723 is connected to a slide 724, and the slide 724 is slidably engaged with a guide rail 725 fixed on the base 1, so that the second drive unit 72 moves stably along the first direction and drives the output shaft 721 to perform linear reciprocating motion.

[0045] In this embodiment, the second drive unit 72 is connected to the slide adapter plate 723, and then connected to the slide 724 through the slide adapter plate 723. The slide 724 is further slidably engaged with the guide rail 725 disposed on the base 1. The second drive unit 72, the slide adapter plate 723, the slide 724 and the guide rail 725 constitute a set of guide mounting structures arranged along the first direction. The guide rail 725 is fixed on the base 1 and serves as a reference component for linear motion. The slide 724 is fitted or engaged on the guide rail 725 and can be relatively translated along the length direction of the guide rail 725. The slide adapter plate 723 is located between the second drive unit 72 and the slide 724 and is used to raise the mounting position of the second drive unit 72 and transfer it to the slide 724. With this configuration, when the second drive unit 72 is in operation, its body is no longer suspended and subjected to force. Instead, it obtains stable support through the cooperation of the slide 724 and the guide rail 725. At the same time, the slide adapter plate 723 adjusts the output position of the second drive unit 72 to be consistent with the movement direction of the downstream output shaft 721, the connector 722, and the pusher 42. During operation, the second drive unit 72 outputs driving force, and the output shaft 721 moves along the first direction. Since the body of the second drive unit 72 is mounted on the slide adapter plate 723 and the slide 724, the guide rail 725 can constrain the movement posture of the second drive unit 72 under force, so that the movement direction of the output shaft 721 is always consistent with the extension direction of the guide rail 725, thereby reducing the impact of the drive end sway on the connector 722 and the pusher 42.

[0046] In one embodiment, the injection assembly 4 further includes a linkage 44, which extends along a first direction. One end of the linkage 44 is connected to the connector 722 via a bushing 726 and a connecting sleeve 727. The pusher 42 extends into the other end of the linkage 44 and is circumferentially fixed to the linkage 44 via a keyway structure.

[0047] In this embodiment, the injection assembly 4 also includes a linkage 44. One end of the linkage 44 is connected to the connector 722 via a bushing 726 and a connecting sleeve 727. The pusher 42 extends into the other end of the linkage 44 and is circumferentially fixed to the linkage 44 via a keyway structure. With this configuration, the linkage 44 is actually located between the output chain of the second drive unit 72 and the pusher 42, serving a dual function of intermediate force transmission and attitude constraint. Regarding the connection, the connector 722 is not directly rigidly connected to the pusher 42, but is first connected to one end of the linkage 44. This end forms a covering or socket-type fit through the bushing 726 and the connecting sleeve 727, allowing the linkage 44 to obtain a relatively stable mounting support relative to the connector 722. At the other end, the pusher 42 is inserted into the linkage 44 and is circumferentially fixed to the linkage 44 via a keyway structure, preventing relative rotation through the keyway engagement. The output shaft 721 of the second drive unit 72 pushes the connector 722, and the connector 722 then transmits the axial displacement to the linkage 44, which in turn drives the pusher 42 to move back and forth in the discharge cylinder 41.

[0048] In another embodiment, the injection feeding device further includes a material cutting adjustment structure disposed on the adapter 5. The material cutting adjustment structure includes a material cutting valve 8 and a third driving member 9 cooperating with the material cutting valve 8. The material cutting valve 8 is disposed in the transition area between the output end of the feed cylinder 31 and the connecting seat 51, and is disposed corresponding to the communication position where the material flows from top to bottom, so as to control the opening or closing of the communication position; the third driving member 9 is connected to the material cutting valve 8 and is used to drive the material cutting valve 8 to switch between the open position and the closed position. Specifically, the material-cutting valve 8 may include a valve core disposed within a valve orifice. The valve core moves in a predetermined direction under the action of the third driving member 9. When the material-cutting valve 8 is in the open position, the output end of the conveying cylinder 31 remains in communication with the connecting seat 51, allowing material from the conveying cylinder 31 to enter the lower injection side via the adapter 5. When the material-cutting valve 8 is in the closed position, the valve core moves to the communication position and blocks the downward flow path of the material, thereby preventing the material from continuing to enter the connecting seat 51 and the downstream area. With this configuration, during the material conveying stage, the material-cutting valve 8 can be opened by the third driving member 9 to allow material to be replenished to the injection side by the conveying assembly 3. During the injection stage or when it is necessary to stop replenishing material, the material-cutting valve 8 can be closed by the third driving member 9, thereby cutting off the communication between the upper conveying channel and the lower injection channel, so that the downstream injection process is no longer affected by the continued supply of material from the upstream. With the above structure, active material cutting control of the front-end transition area can be achieved in the same device, which is beneficial to improve the stability of material control during the injection stage and reduce material accumulation or output instability caused by continuous feeding.

[0049] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. An injection feeding device, characterized in that, include: Base (1), and main body (2) mounted on the base (1); The main body (2) is provided with a feeding assembly (3) and an injection assembly (4). The feeding assembly (3) and the injection assembly (4) are spaced apart in the vertical direction and extend parallel to each other in the first direction. The feeding assembly (3) includes a feeding cylinder (31) and a spiral feeding component (32) disposed therein and extending in a first direction. The injection assembly (4) includes a discharge cylinder (41) and a pusher component (42) disposed therein. The output end of the feeding cylinder (31) is connected to the inlet end of the discharge cylinder (41) through a converter (5). A one-way check valve component (6) is provided inside the converter (5). The main body (2) is provided with a drive assembly (7), which includes a first drive unit (71) and a second drive unit (72) that are respectively connected to the spiral feeder (32) and the pusher (42), and the first drive unit (71) and the second drive unit (72) are relatively independently arranged.

2. The injection feeding device according to claim 1, characterized in that, The outer side of the feeding cylinder (31) is provided with a circular groove (311), and the inner side of the main body (2) is fixedly provided with a first limiting ring (21). The first limiting ring (21) is embedded in the circular groove (311) to restrict the circumferential rotation of the feeding cylinder (31). The groove depth of the circular groove (311) is adapted to the thickness of the first limiting ring (21). The feeding cylinder (31) achieves radial positioning with the main body (2) through the cooperation of the circular groove (311) and the first limiting ring (21).

3. The injection feeding device according to claim 1, characterized in that, The first drive unit (71) includes a first drive member (711) and a drive shaft (712). The drive shaft (712) is rotatably mounted via a bearing (713). One end of the drive shaft (712) is connected to the output end of the first drive member (711) via a key to achieve torque transmission. The other end extends into the feed cylinder (31) and is coaxially fixed to the end of the spiral feeder (32).

4. The injection feeding device according to claim 1, characterized in that, The adapter (5) is connected to the discharge cylinder (41) via a connecting seat (51). A connecting channel is formed inside the connecting seat (51) along the second direction. The connecting channel is connected to the inside of the discharge cylinder (41) via the one-way check assembly (6).

5. The injection feeding device according to claim 4, characterized in that, The one-way check valve assembly (6) includes a check valve seat (61), a spherical check valve (62) movably disposed in the check valve seat (61), and a limiting rod (63) disposed on one side of the check valve seat (61). The end of the check valve seat (61) facing the feed cylinder (31) is connected to the output end of the feed cylinder (31), and the end facing the discharge cylinder (41) is connected to the connecting seat (51).

6. The injection feeding device according to claim 1, characterized in that, It also includes a nozzle (43), which is detachably connected to the output end of the discharge cylinder (41), and the nozzle (43) is provided with a guide channel (431) with a gradually decreasing cross-sectional area along the material flow direction.

7. The injection feeding device according to claim 6, characterized in that, The pusher (42) includes a pusher rod (421) and a frustum-shaped pusher head (422) disposed at the front end of the pusher rod (421). The guide channel (431) of the nozzle (43) near the end of the pusher rod (421) forms a tapered fitting section (432) corresponding to the frustum-shaped pusher head (422). The frustum-shaped pusher head (422) can enter the tapered fitting section (432) axially during the push process and form a surface fit with the inner wall of the tapered fitting section (432).

8. The injection feeding device according to claim 1, characterized in that, The output shaft (721) of the second drive unit (72) drives the pusher (42) to move back and forth in the discharge cylinder (41) through the connector (722), wherein the output shaft (721) and the pusher (42) are relatively parallel.

9. The injection feeding device according to claim 8, characterized in that, The second drive unit (72) is mounted on the slide adapter plate (723), the slide adapter plate (723) is connected to the slide (724), and the slide (724) is slidably engaged with the guide rail (725) fixed on the base (1) so that the second drive unit (72) moves stably in the first direction and drives the output shaft (721) to make linear reciprocating motion.

10. The injection feeding device according to claim 8, characterized in that, The injection assembly (4) further includes a linkage (44), which extends along a first direction. One end of the linkage (44) is connected to the connector (722) through a bushing (726) and a connecting sleeve (727). The pusher (42) extends into the other end of the linkage (44) and is circumferentially fixed to the linkage (44) through a keyway structure.

Images