Injection mold glue feeding system with automatic waste cutting and use method

Abstract

The application relates to the technical field of injection molds, and discloses a use method of an injection mold glue feeding system with automatic waste cutting, which comprises the following working steps: S1, a second cylinder drives a horizontal rod and each cutter to be reset upward as a whole, and a first cylinder drives a pushing block to retract to an initial position; S2, after a mold is opened to a position, the second cylinder is started to extend downward, driving the horizontal rod to synchronously drive a first cutter, a second cutter and a third cutter to descend; S3, the second cylinder drives all the cutters to be synchronously reset upward to the inside of a cutter groove, and then the first cylinder is started to drive the pushing block to move horizontally towards a moving mold direction; S4, the second cylinder is started again to drive each cutter to cut again; and S5, after the twice cutting and end face material scraping are completed, the second cylinder drives the cutters to be reset upward again, and the pushing block completes the whole pushing and discharging of the waste. Through mechanical cooperation of a segmented cutting mechanism and the pushing block, the application realizes the automatic segmented cutting and automatic pushing and discharging integration of the waste in the flow channel after injection.

Description

Technical Field

[0001] This invention relates to the technical field of injection molds, and more particularly to an injection mold glue injection system with automatic waste cutting and its usage method. Background Technology

[0002] Injection molds are widely used in the molding and processing of plastic products. During the injection molding process, molten plastic is injected into the mold cavity through the injection molding machine via the runner to cool and solidify. After the product is formed, as the mold is opened and the product is removed, solidified runner waste is simultaneously formed inside the runner. Currently, most conventional injection molds use a circular runner straight-through gate structure. The runner and gate waste are generally forcibly broken off by the mold opening force, or subsequently removed manually or by additional cutting by a robot.

[0003] In actual production, existing traditional technologies rely solely on mold opening force to cut off runner waste. This results in irregular cuts and defects such as burrs, stringing, and ribs on the cut surface, easily damaging the product's appearance. Subsequent processing requires multiple post-processing steps, including manual trimming, grinding, and secondary finishing. This leads to cumbersome production processes, high labor costs, and low automation. Furthermore, existing automatic mold-cutting structures often only cut at a single point near the gate, failing to perform segmented automatic cutting of the main runner and branch runner waste. The resulting runner waste is often long and heavy, easily adhering to the mold's runner interior after demolding, causing jamming, sticking, and material blockage. This necessitates frequent machine shutdowns for cleaning, impacting continuous injection molding production and resulting in low efficiency. Summary of the Invention

[0004] In view of the problems existing in the above-mentioned injection mold glue injection system with automatic waste cutting, the present invention is proposed.

[0005] Therefore, the purpose of this invention is to provide an injection mold feeding system with automatic waste material cutting.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: including a moving mold and a fixed mold. The moving mold and the fixed mold are arranged in parallel. A rectangular groove is provided through the center of the fixed mold. A rectangular flow channel is fixedly installed inside the rectangular groove. An extension flow channel is provided at the end of the rectangular flow channel away from the moving mold. The extension flow channel protrudes from the fixed mold. A push block is movably installed inside the extension flow channel. A segmented cutting mechanism is provided inside the fixed mold and above the rectangular groove. The segmented cutting mechanism cooperates with the push block. The segmented cutting mechanism includes a first cutter, a second cutter, and a third cutter, which are arranged in a specific order. Three slots are evenly provided above the rectangular flow channel, and the first cutter, the second cutter, and the third cutter are movably installed in the three slots respectively.

[0007] As a preferred embodiment of the injection mold gluing system with automatic waste cutting described in this invention, the four corners of the fixed mold away from the moving mold are provided with fixing frames, the other end of the fixing frame is equipped with a rectangular plate, the surface of the rectangular plate is provided with a first cylinder, and the output end of the first cylinder is fixedly connected to the push block.

[0008] As a preferred embodiment of the injection mold glue feeding system with automatic waste cutting according to the present invention, the top ends of the first cutter, the second cutter and the third cutter are connected to a crossbar, a second cylinder is provided above the crossbar, and the output end of the second cylinder is fixedly connected to the crossbar.

[0009] As a preferred embodiment of the injection mold glue feeding system with automatic waste cutting described in this invention, the inner sidewalls of the cutter grooves are all embedded with high-temperature resistant and wear-resistant sealing gaskets. The outer sidewalls of the first cutter, the second cutter, and the third cutter are slidably fitted with the sealing gaskets of the corresponding cutter grooves. Under normal conditions, each cutter is completely housed inside the cutter groove and its bottom end is flush with the inner wall of the rectangular flow channel. When the cutter moves downward to cut, it penetrates the interior of the rectangular flow channel to completely cut off the glue material. The sealing gaskets fit tightly to prevent molten glue from entering the gap between the cutter grooves and causing mold jamming and material accumulation.

[0010] As a preferred embodiment of the injection mold glue injection system with automatic waste cutting described in this invention, the rectangular flow channel is configured with a square straight-through tubular structure, the internal cavity of the rectangular flow channel is a smooth rectangular through cavity without any protruding clearance steps, and the bottom ends of the first cutter, the second cutter, and the third cutter are all configured with a flat blade shearing structure.

[0011] As a preferred embodiment of the injection mold glue feeding system with automatic waste cutting described in this invention, the shape of the push block is adapted to the rectangular cavity inside the extended flow channel and is slidably sealed, and the side of the push block near the rectangular flow channel is provided with an arc-shaped push slope.

[0012] As a preferred embodiment of the injection mold feeding system with automatic waste cutting described in this invention, the top of the extended flow channel is connected to a connecting pipe, the top of the connecting pipe is connected to a conveying pipe, and the other end of the conveying pipe is connected to the injection molding machine.

[0013] As a preferred embodiment of the injection mold glue feeding system with automatic waste cutting described in this invention, heating wires are threadedly embedded inside both the connecting pipe and the conveying pipe.

[0014] A method for using an injection mold dispensing system with automatic waste cutting includes the following steps: S1. During the injection molding and mold closing stage, the moving mold and the fixed mold fit tightly and are aligned. The second cylinder drives the crossbar and the first cutter, second cutter and third cutter to move upward and reset as a whole. Each cutter is completely stored in the corresponding cutter groove. The bottom of the cutter is flush with the inner wall of the rectangular flow channel. The first cylinder drives the push block to retract to the initial position. The connecting pipe and the extension flow channel are connected. The injection molding machine delivers molten plastic to the inside of the rectangular flow channel through the conveying pipe and connecting pipe to complete the injection filling and pressure holding operations. S2. After injection molding and pressure holding are completed, the moving mold and the fixed mold separate to complete the product mold opening and demolding. After the mold is in place, the second cylinder is activated to extend downwards, driving the crossbar to move the first cutter, the second cutter and the third cutter to move down synchronously, performing a one-time segmented cutting operation on the tubular waste material that has cooled and formed inside the rectangular flow channel, so as to completely cut and separate the product from the flow channel waste material. S3. After the initial cutting is completed, the second cylinder drives all the cutters to move upward and reset to the inside of the cutter groove. Then, the first cylinder is started to drive the push block to move horizontally towards the moving mold direction, and simultaneously pushes the waste material after the segmentation inside the rectangular flow channel forward and discharges it. During the movement of the push block, the top surface is sealed at the bottom of the connecting pipe in real time to block the heated and molten adhesive inside the connecting pipe from flowing downward, and to prevent the phenomenon of glue leakage, glue dripping and waste material overflow. S4. When the push block moves to the corresponding position directly below the third cutter, the pushing action is paused, and the second cylinder is restarted to drive each cutter to move downwards for a second recutting. The waste material that has stuck and stretched during the pushing process is precisely cut off again. At the same time, the cutting edge of the third cutter is used to scrape and clean the end face of the push block, removing the waste material debris stuck to the end of the push block to prevent the material stuck to the end from affecting the subsequent mold closing and injection molding operation. S5. After the secondary cutting and end face scraping are completed, the second cylinder drives the cutter to move upward and reset again. The first cylinder continues to drive the push block to push and discharge the waste material throughout the process. Finally, the first cylinder drives the push block to retract and reset to the initial position, releasing the blockage at the bottom of the connecting pipe and completing the entire process of single injection molding, cutting, discharge, and cleaning, waiting for the next injection molding cycle.

[0015] The beneficial effects of this invention are: This invention uses a rectangular flow channel with a square straight-through tubular structure to replace the traditional circular flow channel. The interior of the flow channel is smooth and without raised steps, allowing for smooth delivery of the molten plastic during injection molding without turbulence or dead corners, and without affecting normal injection molding and filling operations. At the same time, the square flow channel structure is highly compatible with the vertical shearing structure of the flat blade cutter, making it easier to achieve a flat cut across the entire cross section compared to the circular flow channel. The cut surface is neat, without burrs, stringing, or connecting ribs, resulting in high-quality product appearance. No subsequent manual trimming and polishing are required, significantly reducing subsequent processing steps. This invention features a segmented cutting mechanism. A second cylinder drives a crossbar to simultaneously raise and lower three cutting blades: the first, second, and third blades. This enables simultaneous, multi-point, segmented cutting of waste material in the flow channel, resulting in good cutting synchronization and uniform cutting force. It avoids the problems of excessively long waste material and mold sticking during demolding caused by traditional single-point cutting. Furthermore, the cutting blades are normally completely retracted inside the blade groove, and with the sliding seal of the sealing gasket, it effectively prevents molten adhesive from seeping into the gap between the blade grooves, causing blade jamming, material accumulation, and other malfunctions. The mold operates stably, has a long service life, and requires less maintenance. This invention features a first cylinder driving a pusher block to slide horizontally back and forth, enabling automatic discharge of waste material from the flow channel after cutting. This eliminates the need for manual material handling and additional robotic arms for cutting, completing the entire material discharge process automatically. This significantly reduces labor intensity and costs, while improving the automation level and cycle time efficiency of injection molding production. The pusher block is designed with an arc-shaped pushing slope, ensuring uniform force during pushing, smooth discharge, and preventing material breakage and jamming. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 This is a schematic diagram of the fixed mold structure of the present invention.

[0018] Figure 3 This is a schematic diagram of the fixed mold structure from another perspective of the present invention.

[0019] Figure 4 This is a schematic diagram of the segmented cutting mechanism of the present invention.

[0020] Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle.

[0021] In the diagram: 1. Moving mold; 2. Fixed mold; 3. Rectangular runner; 4. Extended runner; 5. Connecting pipe; 6. Conveying pipe; 7. Rectangular plate; 8. Fixing frame; 9. Pushing block; 10. First cylinder; 11. Cutting groove; 12. First cutter; 13. Second cutter; 14. Third cutter; 15. Second cylinder; 16. Crossbar. Detailed Implementation

[0022] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0023] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0024] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0025] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth. Example 1

[0026] Reference Figure 1-5 The first embodiment of the present invention provides an injection mold feeding system with automatic waste cutting, the device including a moving mold 1 and a fixed mold 2; The moving mold 1 and the fixed mold 2 are arranged in parallel. A rectangular groove is provided through the center of the fixed mold 2. A rectangular flow channel 3 is fixedly installed inside the rectangular groove. An extension flow channel 4 is provided at the end of the rectangular flow channel 3 away from the moving mold 1. The extension flow channel 4 protrudes out of the fixed mold 2. A push block 9 is movably installed inside the extension flow channel 4. A segmented cutting mechanism is provided inside the fixed mold 2 and above the rectangular groove. The segmented cutting mechanism cooperates with the push block 9. The segmented cutting mechanism includes a first cutter 12, a second cutter 13, and a third cutter 14. The first cutter 12, the second cutter 13, and the third cutter 14 are arranged in a row. Three cutter grooves 11 are evenly opened above the rectangular flow channel 3. The first cutter 12, the second cutter 13, and the third cutter 14 are respectively movably installed in the three cutter grooves 11.

[0027] In use, the moving mold 1 and the fixed mold 2 are parallel to each other to form the basic mold structure for injection molding. The rectangular runner 3 is fixedly installed inside the central rectangular groove of the fixed mold 2 as a square tube-type special glue inlet channel. The rectangular runner 3 is connected to the extension runner 4 protruding from the fixed mold 2. The extension runner 4 is equipped with a sliding push block 9. The fixed mold 2 is provided with a segmented cutting mechanism above the rectangular runner 3. The segmented cutting mechanism consists of a first cutter 12, a second cutter 13, and a third cutter 14 arranged in sequence. The three cutters are correspondingly and movably installed in the three cutter slots 11 opened above the rectangular runner 3, so that the cutting mechanism and the push block 9 form a mechanical linkage and realize the coordinated action of cutting and pushing the waste material in the rectangular runner 3.

[0028] In summary, the rectangular runner 3-square tube straight-through structure replaces the traditional circular runner, and is compatible with the built-in vertical cutting structure. The layout is neat and facilitates multi-blade segmented synchronous cutting. Through the mechanical cooperation of the segmented cutting mechanism and the push block 9, the automatic segmented cutting and automatic push discharge of runner waste after injection molding is achieved in one integrated manner. No manual trimming or additional robotic arm cutting is required, which completely solves the problems of runner waste sticking to the mold body, the need for subsequent manual trimming, and low production efficiency in traditional injection molds.

[0029] Furthermore, a fixing frame 8 is provided at the four corners of the side of the fixed mold 2 away from the moving mold 1. A rectangular plate 7 is installed at the other end of the fixing frame 8. A first cylinder 10 is provided on the surface of the rectangular plate 7. The output end of the first cylinder 10 is fixedly connected to the push block 9.

[0030] In use, the output end of the first cylinder 10 is directly and fixedly connected to the push block 9 inside the extension channel 4. Relying on the extension and retraction power of the first cylinder 10, the push block 9 is driven to slide horizontally and reciprocally in a straight line inside the extension channel 4, realizing the pushing and moving action of waste material. The structure is simple, the thrust is stable, the response speed is fast, and it can accurately control the pushing stroke and reset position of the push block 9 to push waste material, ensuring that the automatic discharge action is reliable and smooth.

[0031] Furthermore, the top ends of the first cutter 12, the second cutter 13 and the third cutter 14 are connected to a crossbar 16, and a second cylinder 15 is provided above the crossbar 16. The output end of the second cylinder 15 is fixedly connected to the crossbar 16.

[0032] In use, the tops of the first cutter 12, the second cutter 13, and the third cutter 14 are all connected and fixed to the crossbar 16. The second cylinder 15 is mounted on the top of the crossbar 16, and the output end of the second cylinder 15 is fixedly connected to the crossbar 16. The crossbar 16 is raised and lowered by the extension and retraction of the second cylinder 15, and the three cutters are simultaneously moved down and up along the cutter groove 11 to cut synchronously and reset synchronously. This achieves a multi-cutter integrated synchronous cutting action. The crossbar 16 is driven by a single cylinder to move multiple cutters synchronously, ensuring that the cutting sequence of the first cutter 12, the second cutter 13, and the third cutter 14 is consistent and the downward depth is consistent. The cut surface is flat and there is no height difference. There is no need to control multiple sets of cutting power separately, which simplifies the mold pipeline and control circuit, reduces the mold manufacturing cost, and improves the synchronicity and stability of segmented cutting.

[0033] Furthermore, the inner wall of the cutter groove 11 is embedded with a high-temperature and wear-resistant sealing gasket. The outer walls of the first cutter 12, the second cutter 13 and the third cutter 14 are slidably fitted with the sealing gaskets of the corresponding cutter groove 11. Under normal conditions, each cutter is completely housed inside the cutter groove 11 and its bottom end is flush with the inner wall of the rectangular flow channel 3. When the cutter moves downward to cut, it penetrates the interior of the rectangular flow channel 3 to completely cut the adhesive material. The sealing gasket fits and seals to prevent molten adhesive from entering the gap of the cutter groove 11 and causing mold jamming and material accumulation.

[0034] During use, all cutters are normally retracted inside the cutter groove 11, with the bottom of the cutter flush with the inner wall of the rectangular flow channel 3 without protrusion, thus not affecting the normal delivery of the adhesive. During the cutting operation, the cutter descends through the rectangular flow channel 3 to cut the adhesive. The sealing gasket always adheres to the outer wall of the cutter, preventing molten adhesive from seeping into the gap of the cutter groove 11. This effectively prevents the molten adhesive from seeping into the gap of the cutter groove 11, causing material accumulation, cutter jamming, and cutter reset jamming. After the cutter is retracted, the inner wall of the flow channel is flat without steps, ensuring smooth adhesive delivery without turbulence, material accumulation, or dead corners. The sealing gasket is heat-resistant and wear-resistant, with a long service life, reducing the frequency of mold maintenance and ensuring stable and reliable long-term continuous automatic cutting operation.

[0035] Furthermore, the rectangular flow channel 3 adopts a square straight-through tubular structure. The internal cavity of the rectangular flow channel 3 is a smooth rectangular through cavity without any protruding clearance steps. The bottom ends of the first cutter 12, the second cutter 13, and the third cutter 14 are all set as flat blade shearing structures.

[0036] In use, the rectangular flow channel 3 is set as a square straight tube structure with a smooth rectangular cavity without any protrusions or clearance steps, ensuring smooth delivery of molten adhesive. The bottom ends of the first cutter 12, the second cutter 13, and the third cutter 14 all adopt a flat blade shearing structure. The flat blade matches the square cross section of the rectangular flow channel 3. When the cutter moves down, it can achieve a full-section flat cut of the tubular adhesive column inside the flow channel.

[0037] Furthermore, the shape of the push block 9 is adapted to the rectangular cavity inside the extended flow channel 4 and is slidably sealed. An arc-shaped push slope is provided on the side of the push block 9 near the rectangular flow channel 3.

[0038] In use, the shape of the pusher block 9 is perfectly matched with the rectangular cavity inside the extension channel 4 and slides and seals together. The pusher block 9 is provided with an arc-shaped pushing slope on the side near the rectangular channel 3. During the movement of the pusher block 9, it relies on the arc-shaped slope to fit against the end face of the waste material and smoothly push the segmented waste material of the channel forward to be discharged. The pusher block 9 and the channel are sealed together, and the movement is not shaking or stuck. The arc-shaped pushing slope pushes the waste material with uniform force, and the material is not easy to break or stick. The discharge is smooth. The sealing structure can be used to seal the pipe opening later to achieve the function of cutting off glue and preventing dripping. It is a multi-purpose machine. Example 2

[0039] Reference Figure 1-3 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the top of the connecting pipe 5 is connected to the conveying pipe 6, and the other end of the conveying pipe 6 is connected to the injection molding machine.

[0040] In use, the top of the extension channel 4 is connected to the connecting pipe 5, the upper end of the connecting pipe 5 is connected to the conveying pipe 6, and the other end of the conveying pipe 6 is directly connected to the injection molding machine. This allows the molten plastic from the injection molding machine to pass through the conveying pipe 6, the connecting pipe 5, and the extension channel 4 in sequence, finally entering the interior of the rectangular channel 3, forming a complete injection molding delivery path. The overall pipeline connection is smooth, the injection path is short, the pressure loss is small, and the injection filling is stable. The segmented connection structure of the pipeline is easy to disassemble and assemble, and convenient to maintain. It is also convenient for later mold maintenance and pipeline replacement, and is compatible with various injection molding machines.

[0041] Furthermore, both the connecting pipe 5 and the conveying pipe 6 have heating wires threaded inside.

[0042] During use, both the connecting pipe 5 and the conveying pipe 6 have heating wires embedded in their threads. The heating wires continuously heat and keep the adhesive inside the pipe at a constant temperature, ensuring that the plastic inside the pipe is always in a molten and flowing state. This prevents the adhesive from cooling and solidifying, thus avoiding problems such as adhesive cooling and clumping, pipe blockage, and material interruption in the inlet pipe. This ensures a stable supply of adhesive for each injection molding process. At the same time, after the push block 9 seals the pipe opening, the residual heat will not cause the adhesive at the pipe opening to solidify and stick, ensuring uninterrupted continuous injection molding production.

[0043] A method for using an injection mold dispensing system with automatic waste cutting includes the following steps: S1. During the injection molding and mold closing stage, the moving mold 1 and the fixed mold 2 are tightly fitted and aligned. The second cylinder 15 drives the crossbar 16 and the first cutter 12, the second cutter 13, and the third cutter 14 to move upward and reset as a whole. Each cutter is completely stored inside the corresponding cutter groove 11. The bottom of the cutter is flush with the inner wall of the rectangular flow channel 3. The first cylinder 10 drives the push block 9 to retract to the initial position. The connecting pipe 5 is connected to the extension flow channel 4. The injection molding machine delivers molten rubber into the rectangular flow channel 3 through the conveying pipe 6 and the connecting pipe 5 to complete the injection filling and pressure holding operations. S2. After the injection molding and pressure holding are completed, the moving mold 1 and the fixed mold 2 separate to complete the product mold opening and demolding. After the mold is in place, the second cylinder 15 is activated to extend downward, driving the crossbar 16 to move down in tandem with the first cutter 12, the second cutter 13, and the third cutter 14 to perform a one-time segmented cutting operation on the tubular waste material that has cooled and formed inside the rectangular flow channel 3, so as to achieve complete cutting and separation of the product and the flow channel waste material. S3. After the initial cutting is completed, the second cylinder 15 drives all the cutters to move upward and reset to the inside of the cutter groove 11. Then, the first cylinder 10 is started to drive the push block 9 to move horizontally towards the moving mold 1, and simultaneously pushes the segmented waste material inside the rectangular flow channel 3 forward and discharges it. During the movement of the push block 9, the top surface is sealed in real time at the bottom of the connecting pipe 5 to block the heated and molten adhesive inside the connecting pipe 5 from flowing downward, thus preventing the leakage, dripping and overflow of waste material. S4. When the push block 9 moves to the corresponding position directly below the third cutter 14, the pushing action is paused, and the second cylinder 15 is started again to drive each cutter to move down and cut again, so as to accurately cut off the waste material that has been stuck and stretched during the pushing process. At the same time, the cutting edge of the third cutter 14 is in contact with the end face of the push block 9 to scrape and clean the material, remove the waste material debris stuck to the end of the push block 9, and prevent the material stuck to the end from affecting the subsequent mold closing and injection molding operation. S5. After the secondary cutting and end face scraping are completed, the second cylinder 15 drives the cutter to move upward and reset again. The first cylinder 10 continues to drive the push block 9 to complete the entire process of pushing and discharging the waste material. Finally, the first cylinder 10 drives the push block 9 to retract and reset to the initial position, releasing the blockage at the bottom of the connecting pipe 5, completing the entire process of single injection molding, cutting, discharging, and cleaning, and waiting for the next injection molding cycle.

[0044] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims. Furthermore, for the purpose of providing a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features not relevant to the currently considered best mode for carrying out the invention, or those features not relevant to implementing the invention) may be omitted.

[0045] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention 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 solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A plastic injection mold feeding system with automatic waste cutoff, characterized in that: It includes a moving mold (1) and a fixed mold (2); The moving mold (1) and the fixed mold (2) are arranged in parallel. A rectangular groove is provided through the center of the fixed mold (2). A rectangular flow channel (3) is fixedly installed inside the rectangular groove. An extension flow channel (4) is provided at the end of the rectangular flow channel (3) away from the moving mold (1). The extension flow channel (4) protrudes out of the fixed mold (2). A push block (9) is movably installed inside the extension flow channel (4). A segmented cutting mechanism is provided inside the fixed mold (2) and above the rectangular groove. The segmented cutting mechanism cooperates with the push block (9). The segmented cutting mechanism includes a first cutter (12), a second cutter (13), and a third cutter (14). The first cutter (12), the second cutter (13), and the third cutter (14) are arranged in a row. Three cutter grooves (11) are evenly opened above the rectangular flow channel (3). The first cutter (12), the second cutter (13), and the third cutter (14) are respectively movably installed in the three cutter grooves (11).

2. The automatic waste cutoff injection mold feed system of claim 1, wherein: The fixed mold (2) has four corners at the end of the side away from the moving mold (1) with a fixed frame (8). A rectangular plate (7) is installed at the other end of the fixed frame (8). A first cylinder (10) is provided on the surface of the rectangular plate (7). The output end of the first cylinder (10) is fixedly connected to the push block (9).

3. The injection mold feeding system with automatic waste cutting according to claim 2, characterized in that: The top ends of the first cutter (12), the second cutter (13) and the third cutter (14) are connected to a crossbar (16), and a second cylinder (15) is provided above the crossbar (16). The output end of the second cylinder (15) is fixedly connected to the crossbar (16).

4. The injection mold feeding system with automatic waste cutting according to claim 1, characterized in that: The inner sidewall of each cutter groove (11) is embedded with a high temperature and wear resistant sealing gasket. The outer sidewalls of the first cutter (12), the second cutter (13) and the third cutter (14) are slidably fitted with the sealing gaskets of the corresponding cutter grooves (11). Under normal conditions, each cutter is completely housed inside the cutter groove (11) and its bottom end is flush with the inner wall of the rectangular flow channel (3). When the cutter moves down to cut, it penetrates the interior of the rectangular flow channel (3) to completely cut the adhesive material. The sealing gasket fits and seals to prevent the molten adhesive from entering the gap of the cutter groove (11) and causing the material to accumulate in the mold.

5. The injection mold feeding system with automatic waste cutting according to claim 1, characterized in that: The rectangular flow channel (3) is set with a square straight tube structure. The internal cavity of the rectangular flow channel (3) is a smooth rectangular cavity without any protruding steps. The bottom ends of the first cutter (12), the second cutter (13), and the third cutter (14) are all set with flat blade shearing structures.

6. The injection mold feeding system with automatic waste cutting according to claim 5, characterized in that: The shape of the push block (9) is adapted to the rectangular cavity inside the extended flow channel (4) and is slidably sealed. The push block (9) has an arc-shaped push slope on the side near the rectangular flow channel (3).

7. The injection mold feeding system with automatic waste cutting according to claim 2, characterized in that: The top of the extended flow channel (4) is connected to a connecting pipe (5), the top of the connecting pipe (5) is connected to a conveying pipe (6), and the other end of the conveying pipe (6) is connected to an injection molding machine.

8. The injection mold feeding system with automatic waste cutting according to claim 7, characterized in that: Heating wires are threaded inside both the connecting pipe (5) and the conveying pipe (6).

9. A method of using an injection mold gluing system with automatic waste cutting, applied to the injection mold gluing system with automatic waste cutting as described in any one of claims 1-8, characterized in that: The work includes the following steps: S1. During the injection molding and mold closing stage, the moving mold (1) and the fixed mold (2) are closely fitted and aligned. The second cylinder (15) drives the crossbar (16) and the first cutter (12), the second cutter (13), and the third cutter (14) to move upward and reset as a whole. Each cutter is completely stored inside the corresponding cutter groove (11). The bottom of the cutter is flush with the inner wall of the rectangular flow channel (3). The first cylinder (10) drives the push block (9) to retract to the initial position. The connecting pipe (5) is connected to the extension flow channel (4). The injection molding machine delivers molten adhesive into the rectangular flow channel (3) through the conveying pipe (6) and the connecting pipe (5) to complete the injection filling and pressure holding operations. S2. After the injection molding and pressure holding are completed, the moving mold (1) and the fixed mold (2) are separated to complete the product mold opening and demolding. After the mold is in place, the second cylinder (15) is started to extend downward, driving the crossbar (16) to move down in tandem with the first cutter (12), the second cutter (13), and the third cutter (14) to cut the tubular waste material that has cooled and formed inside the rectangular flow channel (3) in one go, so as to achieve complete separation of the product and the flow channel waste. S3. After the initial cutting is completed, the second cylinder (15) drives all the cutters to move upward and reset to the inside of the cutter groove (11) in sync. Then the first cylinder (10) is started to drive the push block (9) to move horizontally toward the moving mold (1), and pushes the waste material after the segmentation inside the rectangular flow channel (3) forward and discharges it. During the movement of the push block (9), the top surface is sealed in real time at the bottom of the connecting pipe (5) to block the heated and molten glue inside the connecting pipe (5) from flowing downward, and prevents glue leakage, glue dripping and waste material overflow. S4. When the push block (9) moves to the corresponding position directly below the third cutter (14), the push action is paused, and the second cylinder (15) is started again to drive each cutter to move down and cut again, so as to accurately cut off the waste material that sticks and stretches during the push process. At the same time, the cutting edge of the third cutter (14) is in contact with the end face of the push block (9) to scrape and clean the material, remove the waste material debris stuck to the end of the push block (9), and prevent the material stuck to the end from affecting the subsequent mold closing and injection molding operation. S5. After the second cutting and end face scraping are completed, the second cylinder (15) drives the cutter to move upward and reset again. The first cylinder (10) continues to drive the push block (9) to complete the full push and discharge of waste material. Finally, the first cylinder (10) drives the push block (9) to retract and reset to the initial position, release the blockage at the bottom of the connecting pipe (5), and complete the entire process of single injection, cutting, discharge and cleaning, waiting for the next injection cycle operation.

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