Injection mold with injection molding structure capable of automatically optimizing plastic recovery proportion

Abstract

The invention relates to the field of injection molds, and discloses an injection mold with an injection molding structure capable of automatically optimizing plastic recovery proportion, which comprises a molding part, the molding part comprises a fixed mold plate seat, the fixed mold plate seat is fixedly connected with a sprue bush, and the left side of the fixed mold plate seat is sequentially provided with a middle plate and a movable mold plate from near to far; the fixed template seat, the middle plate and the movable template are jointly provided with a driving unit; the injection mold with the injection molding structure capable of automatically optimizing the plastic recovery ratio can effectively solve the problems that in the prior art, after traditional injection molding is completed, a formed product in the mold and sprue waste are separated in two modes: one mode is that the product is separated from the waste through separation of a fixed mold plate and a movable mold plate in the demolding process, and the product cannot be separated due to uneven demolding force and rough fracture surface; follow-up trimming and polishing waste materials are difficult to recover and easy to pollute, and manpower and raw materials are wasted; and secondly, products and waste materials fall together and then are cut off, the cost is high, the precision is poor, waste materials are easily polluted during conveying and are difficult to recycle.

Description

[0001] The present invention relates to the field of injection molds, and particularly to an injection mold equipped with an injection structure for automatically optimizing the plastic recycling ratio. Background Art

[0002] Under the wave of global green manufacturing and sustainable development, although the injection molding process is widely used in the large-scale production of plastic products, the problem of waste treatment has hindered the green transformation of the industry.

[0003] When producing a bowl-shaped plastic product by injection molding, after injection molding in the traditional method, there are two ways to separate the molded product and the gate waste in the mold. One way is to directly separate the molded product and the gate waste by the separation between the fixed template and the moving template during demolding. Due to uneven demolding force, the fracture surface is rough, and subsequent secondary finishing such as grinding and trimming is required. The waste generated in the trimming and grinding process is difficult to recycle and is easily contaminated, which is both labor-consuming and wasteful of raw materials.

[0004] Another demolding method is to let the molded product and the waste fall together, and then cut them manually or automatically in subsequent processing. There are also some problems with this method: on the one hand, the cutting cost is high, the accuracy is poor, and material waste is easy to occur. On the other hand, in the transmission link, the waste lacks environmental protection, is easy to be contaminated by dust, oil and other pollutants, is difficult to recycle, consumes a lot of energy for cleaning, and may also cause secondary pollution, which is not conducive to the green development of the injection molding industry. Summary of the Invention

[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides an injection mold equipped with an injection structure for automatically optimizing the plastic recycling ratio, which can effectively solve the problems in the prior art that after traditional injection molding, there are two ways to separate the molded product and the gate waste in the mold: one is to separate the product and the waste by the separation of the fixed and moving templates during demolding. Due to uneven demolding force, the fracture surface is rough, and the waste generated in subsequent trimming and grinding is difficult to recycle and is easily contaminated, which is labor-consuming and wasteful of raw materials; the other is that the product and the waste fall together and then are cut, with high cost, poor accuracy, easy pollution in waste transmission, and difficult recycling.

[0006] To achieve the above object, the present invention is realized through the following technical solutions:

[0007] An injection mold equipped with an injection structure for automatically optimizing the plastic recycling ratio, comprising:

[0008] A molding part, the molding part includes a fixed template seat, a sprue bushing is fixedly connected to the fixed template seat, a middle plate and a moving template are sequentially arranged on the left side of the fixed template seat from near to far, and a driving unit is commonly installed on the fixed template seat, the middle plate and the moving template.

[0009] The separating part, the separating part includes a housing, the housing is fixedly connected to the right end of the middle plate, a base is also fixedly connected to the right end of the middle plate, a holding mechanism is connected to the base, the right end of the holding mechanism is connected to the housing, and a rotary cutting mechanism is connected to the holding mechanism.

[0010] Among them, a feed port is formed through the middle plate from left to right, the cross-section of the feed port is an isosceles trapezoid, a chamfer matching the feed port is provided at the left end of the sprue bushing, and the inner cavity of the sprue bushing is conical and its left end diameter is larger than the right end diameter.

[0011] Among them, the rotary cutting mechanism includes a cutting tool, the cutting tool adopts a two-stage design, a tool holder is fixedly connected to the right end of the cutting tool, a feed assembly is connected to the right end of the tool holder, a rotary assembly is connected to the feed assembly, and a traction mechanism matching the rotary assembly is connected to the sprue bushing.

[0012] Furthermore, the holding mechanism includes sliders, two sliders are symmetrically and slidably connected to the right end of the base, one ends of the two sliders close to the feed port are fixedly connected to the base through push springs, the right ends of the two sliders are jointly hinged to a mounting seat through a hinge plate, the right end of the mounting seat is slidably connected to the housing, a rectangular groove is formed on the left end surface of the slider, a limiting block is fixedly connected to the right end surface of the base, and a pushing component is connected between the slider and the housing.

[0013] Furthermore, the pushing component includes a wedge block, the wedge block is fixedly connected to the right end surface of the slider, a trapezoidal block slidably matched with the wedge block is arranged at the right end of the wedge block, the right end of the trapezoidal block is fixedly connected to a pressing seat through a connecting plate, and the pressing seat is slidably connected to the housing in the left-right direction.

[0014] Furthermore, the rotary assembly includes a rotating seat, the rotating seat is slidably and through-connected to the mounting seat in the left-right direction, a threaded groove is formed on the circumferential outer surface of the rotating seat, an annular seat is arranged outside the rotating seat, a transmission block is fixedly connected to the circumferential inner surface of the annular seat, the transmission block is connected to the threaded groove in a matching manner, and a differential module is connected to the right end of the annular seat.

[0015] Furthermore, the feed assembly includes a spiral track, the spiral track is fixedly connected to the left end of the annular seat, a moving block corresponding to the tool holder is slidably connected to the spiral track, the moving block and the tool holder are slidably connected, and a return spring is also connected between the moving block and the tool holder. The return spring is always in an elastically compressed state, so that the tool holder always has a movement tendency to move away from the rotating seat on the moving block. A push block is also fixedly connected to the left end of the moving block, a limiting rod is fixedly connected to the end of the moving block away from the rotating seat, and a limiting plate is slidably connected to the limiting rod, and the right end of the limiting plate is connected to the differential module.

[0016] Further, the differential module includes a first gear fixedly sleeved on the annular seat. A second gear is also rotatably connected to the annular seat. A transmission gear is meshed with both the second gear and the central gear. The transmission gear is rotatably connected to the mounting seat through a short shaft. The right end of the limiting plate is fixedly connected to the left end of the second gear.

[0017] Further, the traction mechanism includes a connecting sleeve fixedly sleeved on the sprue bushing. Two pressing blocks corresponding to the pressing seat are symmetrically and fixedly connected to the outer circumferential surface of the connecting sleeve. The left end of the connecting sleeve is connected with a delay component.

[0018] Further, the delay component includes a first annular magnet fixedly connected to the left end of the connecting sleeve through a traction spring. The first annular magnet is slidably connected to the sprue bushing. The right end of the rotating seat is fixedly connected with a second annular magnet whose right end attracts the first annular magnet.

[0019] The technical solution provided by the present invention has the following beneficial effects compared with the prior art:

[0020] In the present invention, the middle plate and the moving template will move leftward relative to the sprue bushing under the action of the driving unit. Since the inside of the sprue bushing is conical, the gate waste formed inside it is also conical. During the above relative movement, due to the stress difference between the left and right ends of the gate waste, its right end will automatically withdraw from the sprue bushing, so that there will be no waste residue in the sprue bushing. At the same time, during the above process, the pressing block will gradually lose the pressing on the pressing seat, so that the mounting seat moves leftward, and the cutting knife also moves leftward to reach the connection between the molded product and the gate waste. Then, as the middle plate continues to move leftward relative to the sprue bushing, it will drive the rotary cutting mechanism to operate through the traction mechanism, thereby driving the cutting knife and the tool holder to rotate and feed in the axial direction of the gate waste. Finally, the separation of the gate waste and the molded product is realized. This rotary cutting method, compared with the traditional traction and breaking method, on the one hand, the cut is relatively smooth and flat, and there is no need to perform secondary cutting and grinding on it subsequently. On the other hand, it also maximally ensures the integrity of the gate waste. Furthermore, the gate waste can be collected and recycled immediately after rotary cutting, reducing additional collection and conveying processes, and effectively improving the utilization rate of the gate waste. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0022] Figure 1It is a three-dimensional structure schematic diagram of an injection mold of the present invention with an injection structure for automatically optimizing the plastic recycling ratio.

[0023] Figure 2 It is an exploded view of an injection mold of the present invention with an injection structure for automatically optimizing the plastic recycling ratio.

[0024] Figure 3 It is a three-dimensional structure schematic diagram of the outer shell, base, holding mechanism, rotary cutting mechanism and traction mechanism in an injection mold of the present invention with an injection structure for automatically optimizing the plastic recycling ratio.

[0025] Figure 4 It is a three-dimensional structure schematic diagram of the feeding assembly in an injection mold of the present invention with an injection structure for automatically optimizing the plastic recycling ratio.

[0026] Figure 5 It is an exploded view of the differential assembly and the rotating seat in an injection mold of the present invention with an injection structure for automatically optimizing the plastic recycling ratio.

[0027] Figure 6 It is the present invention Figure 3 A partial enlarged view at position A in it.

[0028] Figure 7 It is the present invention Figure 4 A partial enlarged view at position B in it.

[0029] Figure 8 It is a state conversion diagram of the cutting tool before and during rotary cutting in an injection mold of the present invention with an injection structure for automatically optimizing the plastic recycling ratio.

[0030] Figure 9 It is a cross-sectional view of the sprue bushing in an injection mold of the present invention with an injection structure for automatically optimizing the plastic recycling ratio.

[0031] The reference numerals in the figure respectively represent: 1. fixed template base; 11. sprue bushing; 2. intermediate plate; 21. feed port; 3. moving template; 4. drive unit; 5. housing; 6. base; 7. holding mechanism; 71. slider; 72. mounting seat; 73. limit block; 74. pushing component; 741. wedge block; 742. trapezoidal block; 743. pressing seat; 8. rotary cutting mechanism; 81. cutter; 82. tool holder; 83. feeding component; 831. spiral track; 832. moving block; 833. return spring; 834. pushing block; 835. limit rod; 836. limit plate; 84. rotating component; 841. rotating seat; 842. threaded groove; 843. annular seat; 844. transmission block; 845. differential module; 8451. first gear; 8452. second gear; 8453. transmission gear; 9. traction mechanism; 91. connecting sleeve; 92. pressing block; 93. delay component; 931. first annular magnet; 932. traction spring; 933. second annular magnet. Detailed implementation manners

[0032] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0033] The present invention will be further described below with reference to the embodiments.

[0034] Embodiment:

[0035] Refer to Figures 1-9 , an injection mold equipped with an injection molding structure for automatically optimizing the plastic recycling ratio, comprising:

[0036] A molding part, the molding part includes a fixed template base 1, a sprue bushing 11 is fixedly installed on the fixed template base 1, an intermediate plate 2 is arranged on the left side of the fixed template base 1, the left side of the intermediate plate 2 is connected with a moving template 3 that cooperates with it, the space between the intermediate plate 2 and the moving template 3 is the cavity, and a drive unit 4 is commonly installed on the fixed template base 1, the intermediate plate 2 and the moving template 3 (the function of this drive unit 4 is to separate the fixed and moving template bases 1, the intermediate plate 2 and the moving template 3 after a single injection molding is completed, and then separate the intermediate plate 2 and the moving template 3, thereby promoting the demolding of the molded product, which is the prior art).

[0037] A separating part, the separating part includes a housing 5, the housing 5 is fixedly connected to the right end face of the middle plate 2, a base 6 is also fixedly connected inside the housing 5 on the right end face of the middle plate 2, a holding mechanism 7 is connected to the base 6, the right end of the holding mechanism 7 is connected to the housing 5, and a rotary cutting mechanism 8 is connected to the holding mechanism 7.

[0038] Wherein, a feed port 21 communicating with the cavity is formed through the middle plate 2 from left to right, the cross-section of the feed port 21 is an isosceles trapezoid, a chamfer matching the feed port 21 is formed at the left end of the sprue bushing 11, and the inner cavity of the sprue bushing 11 is conical and its left end diameter is larger than the right end diameter.

[0039] Wherein, the rotary cutting mechanism 8 includes a cutting tool 81, the cutting tool 81 adopts a two-stage design, one section with a cutting edge faces the sprue bushing 11 and is parallel to the left end face of the sprue bushing 11, the other section of the cutting tool 81 is parallel to the slope of the feed port 21 and is fixedly connected to the tool holder 82, a feed assembly 83 for driving the cutting tool 81 to move towards the position of the sprue bushing 11 is connected to the right end of the tool holder 82, a rotating assembly 84 is connected to the feed assembly 83, and a traction mechanism 9 matching the rotating assembly 84 is connected to the sprue bushing 11.

[0040] During specific implementation, in the initial state, the middle plate 2 and the moving template 3 are in contact with each other, and the chamfer at the left end of the sprue bushing 11 abuts against the slope of the feed port 21. During injection molding, the plastic melt ejected by the external injection molding machine nozzle enters and fills the cavity through the sprue bushing 11 and the feed port 21, and is quickly cooled and formed into a molded product in the cavity. The plastic solution remaining in the sprue bushing 11 is also cooled and formed in the sprue bushing 11 (i.e., the sprue waste) and is connected to the molded product. Then, it is necessary to separate the molded product from the sprue waste and demold the molded product.

[0041] During demolding, driven by the driving unit 4, the middle plate 2 and the moving template 3 first move leftward synchronously, driving the molded product and the sprue waste to move leftward synchronously. Since the inside of the sprue bushing 11 is conical and its left end diameter is larger than the right end diameter (as Figure 9 ), during the process of the molded product and the sprue waste moving leftward with the middle plate 2 and the moving template 3, the stress at the right end of the sprue waste is less than the stress at the left end, and its right end will break under the traction force and separate from the sprue bushing 11, and continue to move leftward under the action of the middle plate 2 and the moving template 3 together with the molded product.

[0042] Meanwhile, at the initial stage when the middle plate 2 and the moving template 3 move leftward, the holding mechanism 7 and the rotary cutting mechanism 8 will move leftward synchronously. Since the traction mechanism 9 always remains stationary, relative movement will occur between the traction mechanism 9 and the holding mechanism 7, and thus the restrictive effect on the holding mechanism 7 will be gradually cancelled. During this process, the holding mechanism 7 will reset to its natural state, causing the rotary cutting mechanism 8 to move leftward relative to the housing 5 synchronously. Meanwhile, the cutting knife 81 and the tool holder 82 will also move leftward synchronously to the connection point between the formed product and the gate waste. Then, as the middle plate 2 continues to move leftward, the rotary cutting mechanism 8 will be driven to operate by the traction mechanism 9, so as to drive the cutting knife 81 and the tool holder 82 to feed in the axial direction of the gate waste while rotating. Finally, the separation of the gate waste and the formed product is achieved. Compared with the traditional traction and breaking method, this rotary cutting method has a smoother and flatter cut. On the one hand, it can ensure the quality of the formed product and eliminate the further cutting and grinding steps. On the other hand, it also enables the gate waste to be preserved more completely, which is convenient for subsequent recycling and reuse.

[0043] After the middle plate 2 moves leftward for a certain distance, under the further action of the driving unit 4, the moving template 3 will be separated from the middle plate 2, and the formed product will remain on the moving template 3 and can be taken off by an external robotic arm later.

[0044] The holding mechanism 7 includes sliders 71. Two sliders 71 are symmetrically and slidably connected to the right end of the base 6. One ends of the two sliders 71 close to the feed port 21 are fixedly connected to the base 6 through compression springs. The right ends of the two sliders 71 are jointly hinged to a mounting seat 72 through a hinge plate. The right end of the mounting seat 72 is slidably connected to the housing 5. A rectangular groove is formed on the left end face of the slider 71. A limiting block 73 is fixedly connected to the right end face of the base 6. A pushing component 74 is jointly connected to the slider 71 and the housing 5.

[0045] The pushing component 74 includes a wedge block 741. The wedge block 741 is fixedly connected to the right end face of the slider 71. A trapezoidal block 742 that is slidably matched with the wedge block 741 is arranged at the right end of the wedge block 741. The right end of the trapezoidal block 742 is fixedly connected to a pressing seat 743 through a connecting plate. The pressing seat 743 is slidably connected to the housing 5 in the left-right direction.

[0046] The rotating component 84 includes a rotating seat 841. The rotating seat 841 is slidably and penetratingly connected to the mounting seat 72 in the left-right direction. A threaded groove 842 is formed on the circumferential outer surface of the rotating seat 841. An annular seat 843 is arranged outside the rotating seat 841. A transmission block 844 is fixedly connected to the circumferential inner surface of the annular seat 843. The transmission block 844 is fitted in the threaded groove 842. A differential module 845 is connected to the right end of the annular seat 843.

[0047] The feed assembly 83 includes a spiral track 831, which is fixedly connected to the left end of the annular seat 843. A moving block 832 corresponding to the knife seat 82 is slidably connected to the spiral track 831. The moving block 832 and the knife seat 82 are slidably connected, and a return spring 833 is also commonly connected between the moving block 832 and the knife seat 82. The return spring 833 is always in an elastic compression state, so that the knife seat 82 on the moving block 832 is always in a movement tendency to move away from the rotating seat 841. The left end of the moving block 832 is also fixedly connected to a push block 834. The end of the moving block 832 away from the rotating seat 841 is fixedly connected to a limiting rod 835, and a limiting plate 836 is slidably connected to the limiting rod 835. The right end of the limiting plate 836 is connected to the differential module 845.

[0048] The differential module 845 includes a number one gear 8451, and the number one gear 8451 is fixedly mounted on the annular seat 843. The annular seat 843 is also rotatably connected to a number two gear 8452. The number two gear 8452 and the center gear are jointly meshed with a transmission gear 8453. The transmission gear 8453 is rotatably connected to the mounting seat 72 via a short shaft. The right end of the limit plate 836 is fixedly connected to the left end of the number two gear 8452.

[0049] The traction mechanism 9 includes a connecting sleeve 91, which is fixedly mounted on the gate sleeve 11. Two pressing blocks 92 corresponding to the pressing seat 743 are symmetrically fixedly connected to the circumferential outer surface of the connecting sleeve 91, and a delay component 93 is connected to the left end of the connecting sleeve 91.

[0050] The delay assembly 93 includes a No. 1 annular magnet 931, which is fixedly connected to the left end of the connecting sleeve 91 through a traction spring 932, and the No. 1 annular magnet 931 is slidingly connected to the gate sleeve 11, and the right end of the rotating seat 841 is fixedly connected to a No. 2 annular magnet 933, the right end of which attracts the No. 1 annular magnet 931.

[0051] During specific implementation, in the initial state, the left end of the gate sleeve 11 abuts against the feed port 21, the pressing block 92 presses on the pressing seat 743, and the wedge block 741 and the slider 71 are restricted to a position relatively close to the feed port 21 by the trapezoidal block 742. In this state, the push spring is in an elastic compression state, and the angle between the hinge plate and the slider 71 on the side close to the feed port 21 is relatively large. The mounting seat 72 is in a relatively right position in the housing 5, and the cutter 81 is in a relatively right position in the feed port 21.

[0052] After the plastic melt is injection molded into the mold and cooled, as the intermediate plate 2 and the moving template 3 move leftward under the action of the driving unit 4, the right end of the gate waste is disconnected. Then, as the intermediate plate 2 continues to move leftward, the pressing block 92 will move rightward relative to the housing 5, gradually canceling the pressing force on the pressing seat 743. During this process, since the pressing force received by the right end of the pressing seat 743 gradually decreases, the pressing force applied to the wedge block 741 also gradually decreases. Under the elastic thrust of the pushing spring, the slider 71 and the wedge block 741 move away from the feed port 21, and thus the included angle between the slider 71 and the hinge plate on the side close to the feed port 21 decreases, which will drive the mounting seat 72 to move leftward. The leftward movement of the mounting seat 72 will drive the entire rotary cutting mechanism 8 to move leftward. During this process, the cutting knife 81 also moves leftward synchronously to the connection between the molded product and the gate waste.

[0053] During the above process, the traction spring 932 is always in an elastically compressed state. The first annular magnet 931 will move leftward synchronously with the second annular magnet 933 during the leftward movement of the entire rotary cutting mechanism 8. Then, as the intermediate plate 2 continues to move leftward, the traction spring 932 gradually changes from an elastically compressed state to an elastically stretched state. When its tensile force reaches a certain value, it will pull the second annular magnet 933 to move rightward through the first annular magnet 931, and then drive the rotating seat 841 to move rightward synchronously.

[0054] During the rightward movement of the rotating seat 841, it will drive the transmission block 844 to slide in the threaded groove 842 on its surface, thereby driving the annular seat 843 to rotate. When the annular seat 843 rotates, it will drive the first gear 8451 to rotate, and then drive the second gear 8452 to rotate through the transmission gear 8453. At the same time, since the size of the first gear 8451 is smaller than that of the second gear 8452, the rotational speed of the first gear 8451 is greater than that of the second gear 8452, and there is a speed difference between them. Since the push block 834 is slidably connected to the limit plate 836 through the limit rod 835, and the limit plate 836 is fixedly connected to the second gear 8452, so during the rotation of the spiral track 831 with the annular seat 843, due to the existence of the speed difference, it will drive the push block 834 to move towards the center position of the annular seat 843 through the spiral track 831, and then the tool holder 82 and the cutting knife 81 also move towards the position of the gate waste synchronously. Also, since the push block 834 is always in a rotating state under the action of the limit rod 835, the limit plate 836 and the second gear 8452, the cutting knife 81 will also rotate relative to the gate waste during the feeding process towards the gate waste, and finally achieve the rotary cutting effect until the gate waste is completely separated from the molded product. At this time, the gate waste is taken out of the housing 5 by an external robotic arm.

[0055] When the left end of the rotating seat 841 is blocked by the left end of the annular seat 843 and cannot move further to the right, after that, the elastic tension of the traction spring 932 will further increase until it can pull the first annular magnet 931 away from the second annular magnet 933. At this time, the rotating seat 841 is in a relatively right position within the outer shell 5, and the cutting knife 81 is in the position closest to the gate waste. When the next injection molding is carried out, the intermediate plate 2 and the moving template 3 will move to the right again, so that the sprue bushing 11 abuts against the feed port 21 again. Before the two abut, the first annular magnet 931 will first contact the rotating seat 841 under the action of the traction spring 932 and push the rotating seat 841 to move leftward to reset. During this process, the annular seat 843 also reversely resets, driving the push block 834 and the cutting knife 81 to move away from the sprue bushing 11. At the same time, the pressing block 92 will also contact the pressing seat 743 and drive the pressing seat 743 to move leftward, thereby driving the cutting knife 81 to move from the left end to the right end of the feed port 21 through the hinge plate, so as to avoid blocking the process of the sprue bushing 11 reaching the feed.

[0056] It should be noted that the injection mold equipped with the injection molding structure for automatically optimizing the plastic recycling ratio has the following advantages:

[0057] Advantage 1: In this embodiment, the inside of the sprue bushing 11 is conical and the diameter of its left end is larger than that of the right end. During the demolding process of the molded product, when the intermediate plate 2 and the moving template 3 move synchronously to the left under the action of the driving unit 4, they will drive the molded product and the gate waste to move synchronously to the left. Based on the shape characteristics of the inner cavity of the sprue bushing 11, the stress at the right end of the cooled gate waste is less than that at the left end. Its right end will be pulled out of the sprue bushing 11 under the traction force and continue to move to the left together with the molded product under the action of the intermediate plate 2 and the moving template 3. This demolding method makes the right end of the gate waste relatively complete, and there will be no waste residue in the sprue bushing 11, thus eliminating the process of cleaning the sprue bushing 11.

[0058] Advantage 2: In this embodiment, the intermediate plate 2 and the moving template 3 will move to the left relative to the sprue bushing 11 under the action of the driving unit 4. During this process, the pressing block 92 will gradually lose the pressing force on the pressing seat 743, and the mounting seat 72 will move to the left accordingly. The cutting knife 81 also moves to the left to the connection position of the molded product and the gate waste during this process. Then, as the intermediate plate 2 continues to move to the left relative to the sprue bushing 11, it will drive the rotary cutting mechanism 8 to operate through the traction mechanism 9, thereby driving the cutting knife 81 and the tool holder 82 to rotate and feed in the axial direction of the gate waste, and finally realizing the separation of the gate waste and the molded product. This rotary cutting method has a smoother and flatter cut compared to the traditional traction and breaking method.

[0059] Advantage 3: In this embodiment, when the pressing block 92 gradually loses its pressing effect on the pressing seat 743, the slider 71 can move away from the feeding port 21 under the action of the pushing spring. This movement stops until the limiting block 73 abuts against the slider 71. Therefore, the sliding distance of the slider 71 is a fixed value. Furthermore, the distance that the slider 71 drives the mounting seat 72 to move leftward through the hinge plate is also a fixed value, and the distance that the cutting knife 81 moves leftward is also a fixed value. The advantage of this design is that the left end of the cutting knife 81 can accurately reach the connection between the formed product and the gate waste, thereby ensuring the cutting accuracy and eliminating the subsequent process of polishing again for other requirements (such as appearance).

[0060] Advantage 4: The process of rotary cutting the connection between the formed product and the gate waste by the cutting knife 81 can ensure the integrity of the gate waste to the greatest extent. Furthermore, the gate waste can be collected and reused immediately after the rotary cutting is completed, reducing the additional collection and conveying processes and effectively improving the utilization rate of the gate waste.

[0061] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. However, such modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. An injection mold with an automatic optimization injection molding structure for plastic recycling ratio, characterized in that: include: A molding part, the molding part comprises a fixed mold base (1), a sprue bushing (11) is fixedly connected to the fixed mold base (1), an intermediate plate (2) and a movable mold base (3) are arranged in sequence from near to far on the left side of the fixed mold base (1), and a driving unit (4) is installed on the fixed mold base (1), the intermediate plate (2) and the movable mold base (3); The separation part comprises a shell (5), the shell (5) is fixedly connected to the right end of the middle plate (2), the right end of the middle plate (2) is also fixedly connected to a base (6), the base (6) is connected to a holding mechanism (7), the right end of the holding mechanism (7) is connected to the shell (5), and the holding mechanism (7) is connected to a rotary cutting mechanism (8); The middle plate (2) is provided with a feed port (21) extending therethrough on the left and right sides, the cross section of the feed port (21) is an isosceles trapezoid, the left end of the sprue sleeve (11) is provided with a chamfer matching the feed port (21), the inner cavity of the sprue sleeve (11) is conical and the diameter of the left end is larger than the diameter of the right end; The rotary cutting mechanism (8) comprises a cutter (81), wherein the cutter (81) is designed in two stages, the right end of the cutter (81) is fixedly connected to a cutter holder (82), the right end of the cutter holder (82) is connected to a feed assembly (83), the feed assembly (83) is connected to a rotating assembly (84), and the sprue sleeve (11) is connected to a traction mechanism (9) that cooperates with the rotating assembly (84).

2. The injection mold with an automatic optimization injection molding structure for plastic recycling ratio according to claim 1, characterized in that: The holding mechanism (7) comprises a slider (71), two of which are symmetrically slidably connected to the right end of the base (6), one end of the two sliders (71) close to the feed port (21) is fixedly connected to the base (6) via a push spring, the right ends of the two sliders (71) are hingedly connected to a mounting seat (72) via a hinge plate, the right end of the mounting seat (72) is slidably connected to the housing (5), a rectangular groove is provided on the left end face of the slider (71), a limiting block (73) is fixedly connected to the right end face of the base (6), and a push assembly (74) is commonly connected to the slider (71) and the housing (5).

3. The injection mold with an automatic optimization injection molding structure for plastic recycling ratio according to claim 2, characterized in that: The pushing assembly (74) comprises a wedge block (741), the right end surface of the slider (71) is fixedly connected to the wedge block (741), the right end of the wedge block (741) is provided with a trapezoidal block (742) slidably matched therewith, the right end of the trapezoidal block (742) is fixedly connected to a pressing seat (743) via a connecting plate, and the pressing seat (743) is connected to the housing (5) in a left-right sliding manner.

4. The injection mold with an automatic optimization injection molding structure for plastic recycling ratio according to claim 2, characterized in that: The rotating assembly (84) comprises a rotating seat (841), the rotating seat (841) is slidably connected to the mounting seat (72) from left to right, a threaded groove (842) is provided on the circumferential outer surface of the rotating seat (841), an annular seat (843) is provided on the outer side of the rotating seat (841), a transmission block (844) is fixedly connected to the circumferential inner surface of the annular seat (843), the transmission block (844) is matched and connected in the threaded groove (842), and a differential module (845) is connected to the right end of the annular seat (843).

5. The injection mold with an injection molding structure for automatically optimizing the plastic recycling ratio according to claim 3, characterized in that: The feeding assembly (83) includes a scroll track (831), the scroll track (831) is fixedly connected to the left end of the annular seat (843), a moving block (832) corresponding to the knife seat (82) is slidably connected to the scroll track (831), the moving block (832) and the knife seat (82) are slidably connected, and a return spring (833) is also commonly connected between the moving block (832) and the knife seat (82), and the return spring (833) is always in a state of elasticity. The tool holder (82) is in a state of compression, so that the tool holder (82) on the moving block (832) is always in a movement tendency to move away from the rotating seat (841), and the left end of the moving block (832) is also fixedly connected to a push block (834), and the end of the moving block (832) away from the rotating seat (841) is fixedly connected to a limiting rod (835), and the limiting rod (835) is slidably connected to a limiting plate (836), and the right end of the limiting plate (836) is connected to the differential module (845).

6. The injection mold with an automatic optimization injection molding structure for plastic recycling ratio according to claim 5, characterized in that: The differential module (845) includes a first gear (8451), the first gear (8451) is fixedly sleeved on the annular seat (843), and the annular seat (843) is also rotatably connected to a second gear (8452), the second gear (8452) and the central gear are jointly meshed with a transmission gear (8453), and the transmission gear (8453) is rotatably connected to the mounting seat (72) via a short shaft, and the right end of the limit plate (836) is fixedly connected to the left end of the second gear (8452).

7. The injection mold with an automatic optimization injection molding structure for plastic recycling ratio according to claim 5, characterized in that: The traction mechanism (9) comprises a connecting sleeve (91), the connecting sleeve (91) being fixedly mounted on the gate sleeve (11), the circumferential outer surface of the connecting sleeve (91) being symmetrically fixedly connected with two pressing blocks (92) corresponding to the pressing seat (743), and the left end of the connecting sleeve (91) being connected with a delay component (93).

8. The injection mold with an automatic optimization injection molding structure for plastic recycling ratio according to claim 7, characterized in that: The delay assembly (93) includes a first annular magnet (931), which is fixedly connected to the left end of the connecting sleeve (91) via a traction spring (932), and the first annular magnet (931) and the gate sleeve (11) are slidably connected, and the right end of the rotating seat (841) is fixedly connected to a second annular magnet (933) whose right end attracts the first annular magnet (931).

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