A material drop-off conveyor for an injection molding machine

Abstract

The utility model relates to blanking conveying device technical field, the utility model provides a blanking conveying device for injection molding machine, it includes injection molding machine body, the top middle part fixed coupling of injection molding machine body has central controller, multistage mechanical arm feed assembly and clamping assembly, multistage mechanical arm feed assembly fixed connection is in the top front side of injection molding machine body, the clamping assembly fixed coupling is in multistage mechanical arm feed assembly away from one end of injection molding machine body, buffer conveying assembly, buffer conveying assembly sets up in the left side of injection molding machine body and blanking conveying frame is overlapped and is connected between injection molding machine body and buffer conveying assembly. Through the above technical scheme, when the injection molding machine discharging position or material shape changes in the prior art, it cannot be adapted, resulting in the device applicability is greatly reduced, the action coherence is poor, the operation efficiency is low and the material slides from the blanking conveying frame and will directly impact the hard structure after, the damage rate will greatly improve the technical problem.

Description

Technical Field

[0001] This utility model relates to the technical field of material feeding and conveying devices, specifically, to a material feeding and conveying device for injection molding machines. Background Technology

[0002] In existing technologies, injection molding machine material feeding and conveying devices come in various forms. Common methods include using a conveyor belt to directly receive the molded material and transport it to subsequent processing or collection areas, such as the discharge mechanism of some injection molding machines, which uses a conveyor belt to remove material from the discharge cavity of the injection molding machine body. Other methods use pipelines for material feeding and conveying, providing a certain degree of guidance and transport. Additionally, some devices combine adsorption and gripping methods to assist material feeding. For example, an adsorption plate is used to adsorb the molded material, and then a rotary cylinder drives the adsorption plate to rotate, sending the material above the conveying assembly, where it is finally transported by the conveyor belt.

[0003] Existing material feeding devices for injection molding machines only pick up materials from specific locations and with specific dimensions. They cannot adapt when the material outlet position or the shape of the material changes, resulting in a significant reduction in the device's applicability. Furthermore, relying on manual material handling or simple mechanical conveying leads to poor continuity of operations, and the material handling and unloading processes are time-consuming, failing to match the production rhythm of the injection molding machine and reducing the overall operating efficiency of the production line. In addition, without a buffer structure, existing material feeding devices for injection molding machines allow material to directly impact the ground or other hard structures after sliding off the feeding conveyor frame. The large impact force can cause scratches, cracks, or even complete shattering of the material surface. This damage rate is particularly high for injection molded parts made of brittle materials or with complex structures, significantly increasing production costs. Utility Model Content

[0004] To overcome the above-mentioned defects, this utility model provides a material feeding and conveying device for injection molding machines, which solves the technical problems in the prior art that when the discharge position or material shape of the injection molding machine changes, the device cannot adapt, resulting in a significant reduction in applicability, poor continuity of operation and low operating efficiency, and the material will directly hit the ground or other hard structures after sliding off the material feeding and conveying frame, which will greatly increase the damage rate.

[0005] According to one aspect, at least one embodiment of the present invention provides a material feeding and conveying device for an injection molding machine, comprising: The injection molding machine body has a central controller fixedly connected to the top center, and a material feeding conveyor frame fixedly connected to the left side of the injection molding machine body by bolts. A multi-stage robotic arm feeding assembly and a clamping assembly are provided. The multi-stage robotic arm feeding assembly is fixedly connected to the top front side of the injection molding machine body, and the clamping assembly is fixedly connected to the end of the multi-stage robotic arm feeding assembly away from the injection molding machine body. A buffer conveyor assembly is provided, which is located on the left side of the injection molding machine body and the material feeding conveyor frame overlaps between the injection molding machine body and the buffer conveyor assembly.

[0006] For example, in at least one embodiment of the present invention, a material feeding and conveying device for an injection molding machine is provided, wherein the multi-stage robotic arm feeding assembly includes a base, the base is fixedly connected to the top front side of the injection molding machine body, a worm gear is rotatably connected inside the base, a motor is fixedly connected to the rear side wall of the base, the output end of the motor passes through the interior of the base and is fixedly connected to the worm gear, a worm wheel is meshed with the left side of the worm gear, a rotating shaft is fixedly connected inside the worm wheel and rotatably connected to the inner walls of the upper and lower sides of the base, and the top of the rotating shaft passes through the top of the base and is fixedly connected to a rotating frame.

[0007] For example, in at least one embodiment of the present invention, a material feeding and conveying device for an injection molding machine is provided, wherein a first robotic arm is rotatably connected to the upper interior of the rotating frame, a second motor is fixedly connected to the right side of the rotating frame, and a third motor is fixedly connected to the left side of the rotating frame. The output end of the second motor passes through the interior of the rotating frame and is fixedly connected to the first robotic arm. The output end of the third motor passes through the interior of both the rotating frame and the first robotic arm and is fixedly connected to a connecting short rod. A connecting long rod is rotatably connected to the end of the connecting short rod away from the output shaft of the third motor. A connecting disc that is rotatably connected to the top of the first robotic arm is rotatably connected to the top of the connecting long rod.

[0008] For example, in at least one embodiment of the present invention, a material feeding and conveying device for an injection molding machine is provided, wherein a second robotic arm is fixedly connected to the rear side of the connecting plate, a drive chamber is fixedly connected to the rear end of the second robotic arm, a motor four is fixedly connected inside the drive chamber, the output end of the motor four extends through the right outer wall of the drive chamber and is fixedly connected to a third robotic arm that is rotatably connected to the drive chamber, and the central controller is electrically connected to motor one, motor two, motor three and motor four respectively.

[0009] For example, in at least one embodiment of the present invention, a material feeding and conveying device for an injection molding machine is provided, wherein the clamping assembly includes a connecting plate, the connecting plate is fixedly connected to the side of the third robotic arm away from the drive chamber, a cross slide is fixedly connected to the rear side of the connecting plate, a servo motor is fixedly connected to the top of the connecting plate, and the output end of the servo motor extends through to the bottom of the connecting plate and is fixedly connected to a rotating plate.

[0010] For example, in a material feeding and conveying device for an injection molding machine provided in at least one embodiment of the present invention, arc-shaped connecting rods are rotatably connected to both the left and right ends of the rotating plate, and sliders are rotatably connected to the ends of the two arc-shaped connecting rods that are far apart from each other. Sliders that slide against the outer wall of the cross slide are rotatably connected to the rear side of the two sliders, and clamping blocks are fixedly connected to the rear side of the two sliders. The central controller is electrically connected to the servo motor.

[0011] For example, in at least one embodiment of the present invention, a material feeding conveying device for an injection molding machine is provided, wherein the buffer conveying assembly includes a conveying frame, and the left and right sides of the material feeding conveying frame are respectively fixed to the top of the conveying frame and the top of the injection molding machine body by bolts. Conveying rollers are rotatably connected to the front and rear sides inside the conveying frame. A stepper motor electrically connected to the central controller is fixedly connected to the right side of the conveying frame, and the output end of the stepper motor passes through the interior of the conveying frame and is fixedly connected to the end of the front conveying roller.

[0012] For example, in at least one embodiment of the present invention, a material feeding and conveying device for an injection molding machine is provided, wherein an L-shaped fixing plate is fixedly connected to the top front side of the conveying frame, two sliding rods are slidably connected to the left side of the L-shaped fixing plate through a circular slot, a buffer plate is fixedly connected to the right end of the two sliding rods, a limit block is fixedly connected to the left side of each of the two sliding rods, a spring is sleeved on the outer wall of each of the two sliding rods, and the left and right ends of the two springs are fixedly connected to the inner wall of the L-shaped fixing plate and the buffer plate, respectively, and a rubber anti-collision pad is fixedly connected to the right side of the buffer plate.

[0013] The beneficial effects of the embodiments of this utility model are as follows: In this invention, a multi-stage robotic arm feeding and clamping assembly enables coordinated movement of multiple joints, allowing for precise adjustment of position and angle. This ensures the clamping assembly is accurately positioned at the injection molding machine's outlet, guaranteeing stable gripping of the molding material and preventing material drop due to positional deviations. The robotic arm can also quickly complete the entire process from material pickup to delivery to the top of the discharge conveyor frame. The coordinated operation of the motors and the continuous motion reduce intermediate waiting time during material transport, accelerating the overall production pace. Furthermore, the buffer conveying assembly, with its buffer plate, springs, and rubber anti-collision pads, effectively absorbs the impact during material transport, preventing damage and deformation caused by collisions. This provides crucial protection, especially for fragile or high-precision injection molded parts. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this utility model and these drawings without any creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of the multi-stage robotic arm material conveying assembly of this utility model; Figure 3 This is another structural schematic diagram of the multi-stage robotic arm material conveying assembly of this utility model; Figure 4 This is a schematic diagram of the clamping assembly of this utility model; Figure 5 This is a schematic diagram of the structure of the buffer conveying assembly of this utility model; Figure 6 This utility model Figure 5 Enlarged view of the structure at point A in the middle.

[0016] In the diagram: 10. Injection molding machine body; 11. Central controller; 12. Material feeding conveyor frame; 2. Multi-stage robotic arm feeding assembly; 20. Base; 21. Worm gear; 22. Motor 1; 23. Worm wheel; 24. Rotating frame; 25. Motor 2; 26. Motor 3; 27. Connecting short rod; 28. Connecting long rod; 29. ​​Connecting plate; 290. Second robotic arm; 291. Drive chamber; 292. Motor 4; 293. Third robotic arm; 294. First robotic arm; 3. Clamping assembly; 30. Connecting plate; 31. Servo motor; 32. Rotating plate; 33. Arc-shaped connecting rod; 34. Slider; 35. Cross slide; 36. Clamping block; 4. Buffer conveying assembly; 40. Conveying frame; 41. Conveying roller; 42. Stepper motor; 43. L-shaped fixing plate; 44. Slide bar; 45. Buffer plate; 46. Spring. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit its scope.

[0018] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0019] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0021] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] like Figures 1-4 As shown, it illustrates a material feeding and conveying device for an injection molding machine according to an embodiment of the present invention, comprising: The injection molding machine body 10 has a central controller 11 fixedly connected to the top center of the injection molding machine body 10, and a material feeding conveyor frame 12 fixedly connected to the left side of the injection molding machine body 10 by bolts. The multi-stage robotic arm feeding assembly 2 and the clamping assembly 3 are fixedly connected to the top front side of the injection molding machine body 10, and the clamping assembly 3 is fixedly connected to the end of the multi-stage robotic arm feeding assembly 2 away from the injection molding machine body 10. The buffer conveyor assembly 4 is located on the left side of the injection molding machine body 10, and the material feeding conveyor frame 12 overlaps between the injection molding machine body 10 and the buffer conveyor assembly 4.

[0024] The injection molding machine body 10 includes a cylinder drive component, a main frame, a thermoplastic molding mechanism, a heating mechanism, and other components. The injection molding machine body 10 adopts a common model in the prior art, and its power supply, air supply, specific composition and principle are clear to those skilled in the art, so they will not be described in detail.

[0025] The multi-stage robotic arm material feeding assembly 2 includes a base 20, which is fixedly connected to the top front side of the injection molding machine body 10. A worm gear 21 is rotatably connected inside the base 20. A motor 22 is fixedly connected to the rear side wall of the base 20. The output end of the motor 22 passes through the interior of the base 20 and is fixedly connected to the worm gear 21. A worm wheel 23 is meshed with the left side of the worm gear 21. A rotating shaft that is rotatably connected to the upper and lower inner walls of the base 20 is fixedly connected inside the worm wheel 23. The top of the rotating shaft passes through the top of the base 20 and is fixedly connected to a rotating frame 24.

[0026] A first robotic arm 294 is rotatably connected to the upper part of the rotating frame 24. A second motor 25 is fixedly connected to the right side of the rotating frame 24, and a third motor 26 is fixedly connected to the left side of the rotating frame 24. The output end of the second motor 25 passes through the interior of the rotating frame 24 and is fixedly connected to the first robotic arm 294. The output end of the third motor 26 passes through the interior of the rotating frame 24 and the first robotic arm 294 respectively and is fixedly connected to a connecting short rod 27. A connecting long rod 28 is rotatably connected to the end of the connecting short rod 27 away from the output shaft of the third motor 26. A connecting plate 29, which is rotatably connected to the top of the first robotic arm 294, is rotatably connected to the top of the connecting long rod 28.

[0027] A second robotic arm 290 is fixedly connected to the rear side of the connecting plate 29. A drive chamber 291 is fixedly connected to the rear end of the second robotic arm 290. A motor 292 is fixedly connected inside the drive chamber 291. The output end of the motor 292 extends through to the right outer wall of the drive chamber 291 and is fixedly connected to a third robotic arm 293 that is rotatably connected to the drive chamber 291. The central controller 11 is electrically connected to motor 22, motor 25, motor 3, and motor 292 respectively.

[0028] The clamping assembly 3 includes a connecting plate 30, which is fixedly connected to the side of the third robotic arm 293 away from the drive chamber 291. A cross slide 35 is fixedly connected to the rear side of the connecting plate 30. A servo motor 31 is fixedly connected to the top of the connecting plate 30. The output end of the servo motor 31 extends through to the bottom of the connecting plate 30 and is fixedly connected to a rotating plate 32.

[0029] Both ends of the rotating plate 32 are rotatably connected to arc-shaped connecting rods 33. The ends of the two arc-shaped connecting rods 33 that are far apart from each other are rotatably connected to sliders 34. The rear sides of the two sliders 34 are rotatably connected to sliders 34 that are slidably connected to the outer wall of the cross slide block 35. The rear sides of the two sliders 34 are fixedly connected to clamping blocks 36. The central controller 11 is electrically connected to the servo motor 31.

[0030] In some examples, when the device is working, the central controller 11 first issues a command to start motor 22. The output of motor 22 drives worm 21 to rotate. Worm 21 meshes with worm wheel 23, causing the rotating shaft inside worm wheel 23 to rotate, which in turn drives the rotating frame 24 to rotate horizontally to a suitable position. At the same time, motor 25 starts, and its output directly drives the first robotic arm 294 to rotate inside the rotating frame 24, adjusting the pitch angle of the first robotic arm 294. Motor 3 starts synchronously, and its output drives the connecting short rod 27 to rotate. The connecting short rod 27 pulls the connecting plate 29 through the connecting long rod 28, causing the connecting plate 29 to rotate at the top of the first robotic arm 294, indirectly adjusting the position of the second robotic arm 290. Motor 4 292 starts in the drive chamber 291, and its output drives the third robotic arm 293 to rotate, finally accurately delivering the clamping assembly 3 to the discharge port of the injection molding machine body 10.

[0031] When the clamping assembly 3 reaches the designated position, the central controller 11 controls the servo motor 31 to start, and its output end drives the rotating plate 32 to rotate. The arc-shaped connecting rods 33 at both ends of the rotating plate 32 swing accordingly, pushing the slider 34 to slide towards the middle on the cross slide block 35, so that the two clamping blocks 36 approach each other and clamp the forming material.

[0032] After the material is clamped, the central controller 11 controls the motors of the multi-stage robotic arm conveying assembly 2 to operate in reverse, driving the clamping assembly 3 to move above the material dropping conveyor frame 12. The servo motor 31 rotates in reverse, and the rotating plate 32 drives the arc-shaped connecting rod 33 to pull the slider 34 to slide to both sides on the cross slide 35. The clamping block 36 releases the material, and the material falls into the material dropping conveyor frame 12. Through the multi-stage robotic arm conveying assembly 2 and the clamping assembly 3, the multi-joint coordinated movement is realized, which can accurately adjust the position and angle, and accurately deliver the clamping assembly 3 to the injection molding machine outlet, ensuring stable gripping of the molded material and avoiding material failure or material falling due to position deviation. This expands the material picking range. At the same time, the robotic arm can quickly complete the entire process from picking up the material to delivering the material above the material dropping conveyor frame. The coordinated operation of the motors and the smooth movement reduce the intermediate waiting time of material conveying and speed up the overall production rhythm.

[0033] like Figures 5-6 As shown, it illustrates a buffer conveying assembly 4 in another embodiment of the present invention. The buffer conveying assembly 4 includes a conveying frame 40. The left and right sides of the material feeding conveying frame 12 are respectively fixed to the top of the conveying frame 40 and the top of the injection molding machine body 10 by bolts. Conveying rollers 41 are rotatably connected to the front and rear sides inside the conveying frame 40. A stepper motor 42 electrically connected to the central controller 11 is fixedly connected to the right side of the conveying frame 40. The output end of the stepper motor 42 extends through the interior of the conveying frame 40 and is fixedly connected to the end of the front conveying roller 41.

[0034] An L-shaped fixing plate 43 is fixedly connected to the top front side of the conveyor frame 40. Two slide rods 44 are slidably connected to the left side of the L-shaped fixing plate 43 through a circular slot. A buffer plate 45 is fixedly connected to the right end of the two slide rods 44. A limit block is fixedly connected to the left side of each of the two slide rods 44. A spring 46 is sleeved on the outer wall of each of the two slide rods 44. The left and right ends of the two springs 46 are fixedly connected to the inner wall of the L-shaped fixing plate 43 and the buffer plate 45, respectively. A rubber anti-collision pad is fixedly connected to the right side of the buffer plate 45.

[0035] In some examples, the material slides down the drop conveyor frame 12 onto the conveyor belt of the buffer conveyor assembly 4. The central controller 11 controls the stepper motor 42 to start, and the output of the stepper motor 42 drives the front conveyor roller 41 to rotate. The conveyor roller 41 drives the conveyor belt to rotate through friction, conveying the material. When the material contacts the buffer plate 45, the buffer plate 45 is pushed to the left, pushing the slide rod 44 to slide in the circular slot of the L-shaped fixed plate 43. At this time, the spring 46 on the outer wall of the slide rod 44 is compressed, and together with the rubber anti-collision pad on the right side of the buffer plate 45, it absorbs the impact force, realizes the buffer deceleration of the material, and avoids damage to the material. Through the buffer conveyor assembly 4, the buffer plate 45, the spring 46 and the rubber anti-collision pad can effectively absorb the impact force during the material conveying process, and avoid the material from being damaged or deformed due to collision. It plays a key protective role, especially for fragile or injection molded parts with high surface precision requirements.

[0036] It should be noted that the central controller 11, motors and other components are common models on the market, and each component is a device or equipment that exists in the prior art or can be implemented by the prior art. Their power supply, specific composition and principle are clear to those skilled in the art. At the same time, the fixed connection method mentioned in this utility model can adopt the connection methods that exist in the prior art and are common, such as bolts, welding, bonding, and integral molding, so it will not be described in detail.

[0037] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A material feeding and conveying device for an injection molding machine, characterized in that, include: The injection molding machine body (10) has a central controller (11) fixedly connected to the top center of the injection molding machine body (10), and a material feeding conveyor frame (12) is fixedly connected to the left side of the injection molding machine body (10) by bolts. A multi-stage robotic arm feeding assembly (2) and a clamping assembly (3) are provided. The multi-stage robotic arm feeding assembly (2) is fixedly connected to the top front side of the injection molding machine body (10), and the clamping assembly (3) is fixedly connected to the end of the multi-stage robotic arm feeding assembly (2) away from the injection molding machine body (10). A buffer conveying assembly (4) is provided on the left side of the injection molding machine body (10) and the material feeding conveying frame (12) overlaps between the injection molding machine body (10) and the buffer conveying assembly (4).

2. A material drop-off conveyor for an injection molding machine as defined in claim 1, wherein, The multi-stage robotic arm feeding assembly (2) includes a base (20), which is fixedly connected to the top front side of the injection molding machine body (10). A worm gear (21) is rotatably connected inside the base (20). A motor (22) is fixedly connected to the rear side wall of the base (20). The output end of the motor (22) passes through the interior of the base (20) and is fixedly connected to the worm gear (21). A worm wheel (23) is meshed with the left side of the worm gear (21). A rotating shaft is fixedly connected inside the worm wheel (23) and rotatably connected to the inner walls of the upper and lower sides of the base (20). The top of the rotating shaft passes through the top of the base (20) and is fixedly connected to a rotating frame (24).

3. A material drop-off conveyor for an injection molding machine as defined in claim 2, wherein, The rotating frame (24) is rotatably connected to the upper part of the interior of the rotating frame (24). The rotating frame (24) is fixedly connected to the right side of the rotating frame (24) and the rotating frame (24) is fixedly connected to the left side of the rotating frame (24). The output end of the rotating frame (25) passes through the interior of the rotating frame (24) and is fixedly connected to the first mechanical arm (294). The output end of the rotating frame (24) and the first mechanical arm (294) respectively passes through the interior of the rotating frame (24) and the first mechanical arm (294) and is fixedly connected to the connecting short rod (27). The end of the connecting short rod (27) away from the output shaft of the third mechanical arm (26) is rotatably connected to the connecting long rod (28). The top of the connecting long rod (28) is rotatably connected to the connecting plate (29) which is rotatably connected to the top of the first mechanical arm (294).

4. A material feeding and conveying device for an injection molding machine according to claim 3, characterized in that, The rear side of the connecting plate (29) is fixedly connected to a second robotic arm (290), the rear end of the second robotic arm (290) is fixedly connected to a drive chamber (291), the inside of the drive chamber (291) is fixedly connected to a motor four (292), the output end of the motor four (292) extends through to the right outer wall of the drive chamber (291) and is fixedly connected to a third robotic arm (293) that is rotatably connected to the drive chamber (291), and the central controller (11) is electrically connected to motor one (22), motor two (25), motor three (26) and motor four (292) respectively.

5. A material feeding and conveying device for an injection molding machine according to claim 4, characterized in that, The clamping assembly (3) includes a connecting plate (30), which is fixedly connected to the side of the third robotic arm (293) away from the drive chamber (291). A cross slide (35) is fixedly connected to the rear side of the connecting plate (30). A servo motor (31) is fixedly connected to the top of the connecting plate (30). The output end of the servo motor (31) extends through to the bottom of the connecting plate (30) and is fixedly connected to a rotating plate (32).

6. A material drop-off conveyor for an injection molding machine as defined in claim 5, wherein, Both ends of the rotating plate (32) are rotatably connected to arc-shaped connecting rods (33). The ends of the two arc-shaped connecting rods (33) that are far apart from each other are rotatably connected to sliders (34). The rear sides of the two sliders (34) are rotatably connected to sliders (34) that are slidably connected to the outer wall of the cross slide (35). The rear sides of the two sliders (34) are fixedly connected to clamping blocks (36). The central controller (11) is electrically connected to the servo motor (31).

7. A material feeding and conveying device for an injection molding machine according to claim 1, characterized in that, The buffer conveying assembly (4) includes a conveying frame (40). The left and right sides of the material feeding conveying frame (12) are fixed to the top of the conveying frame (40) and the top of the injection molding machine body (10) respectively by bolts. The conveying frame (40) has conveying rollers (41) rotatably connected to both the front and rear sides inside. The right side of the conveying frame (40) is fixedly connected to a stepper motor (42) electrically connected to the central controller (11). The output end of the stepper motor (42) passes through the interior of the conveying frame (40) and is fixedly connected to the end of the front conveying roller (41).

8. A material feeding and conveying device for an injection molding machine according to claim 7, characterized in that, An L-shaped fixing plate (43) is fixedly connected to the top front side of the conveyor frame (40). Two slide rods (44) are slidably connected to the left side of the L-shaped fixing plate (43) through a circular slot. A buffer plate (45) is fixedly connected to the right end of the two slide rods (44). A limit block is fixedly connected to the left side of each of the two slide rods (44). A spring (46) is sleeved on the outer wall of each of the two slide rods (44). The left and right ends of the two springs (46) are fixedly connected to the inner wall of the L-shaped fixing plate (43) and the buffer plate (45) respectively. A rubber anti-collision pad is fixedly connected to the right side of the buffer plate (45).

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