Mold for producing pet plastic steel belt

Abstract

The application relates to the technical field of packaging belt mold, and proposes a PET plastic steel belt production mold, which comprises a front mold and a rear mold, and further comprises a main runner, a secondary runner, a mold cavity, a flow adjusting assembly, a dismounting assembly and a flow guiding assembly; the main runner is arranged on the front mold; the secondary runner is arranged on the rear mold; a plurality of mold cavities for flow division are arranged at equal intervals in the lower part of the secondary runner; a plurality of flow adjusting assemblies are arranged on the rear mold; the flow adjusting assemblies and the mold cavities are in one-to-one correspondence; the dismounting assemblies are arranged at the bottom of the front mold and the rear mold; the dismounting assembly at the bottom of the front mold is matched with the dismounting assembly at the bottom of the rear mold; and a plurality of flow guiding assemblies are arranged on the dismounting assembly. Through the technical scheme, the problem that the consistency of the size of finished products deviates due to the fact that traditional adjusting screws penetrate the middle section of the runner, thereby causing the blocking of the melt passage, affecting the flow uniformity and the melt flow efficiency, and causing the consistency of the size of finished products to deviate is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of packaging tape moulds, and in particular to a mould for producing PET plastic-steel tapes. Background Art

[0002] PET plastic-steel strapping is a new type of environmentally friendly packaging material made from polyethylene terephthalate (PET) as the main raw material. During its production process, the mold determines the shape, size and other key parameters of the plastic-steel strapping, which has a significant impact on the quality and production efficiency of the plastic-steel strapping. Therefore, the PET strapping strapping mold is a key equipment for the production of this material. Its core function is to mold the molten PET material into strapping straps of different specifications through a specific flow channel structure.

[0003] During the production process, the PET particles are first melted into a uniform melt by the rotation of the screw, and the melt enters the main channel of the mold and is distributed to multiple mold cavities through symmetrically bifurcated flow channels. The flow rate of each mold cavity is then controlled by manually adjusting the screws, and the product is cooled to give it a preliminary shape. The formed strapping tape enters the cooling water tank and is quickly cooled to stabilize its size. The traction speed is synchronously controlled by the frequency conversion motor to ensure uniform tension of the strapping tape. It is then cut into segments of a determined length to complete production.

[0004] With the growing demand for ultra-small PET strapping tape in the packaging industry, existing strapping tape molds face significant technical bottlenecks in producing such products. Because traditional adjusting screws penetrate the middle section of the flow channel, it is easy to block the melt passage, thereby affecting the flow uniformity and melt flow efficiency, resulting in deviations in the consistency of the finished strapping tape size. Summary of the Invention

[0005] The present invention proposes a mold for producing PET plastic steel strips, which is used to solve the problem in the prior art that the traditional adjusting screw penetrates the middle section of the flow channel, thereby blocking the melt passage, thereby affecting the flow uniformity and melt flow efficiency, and causing deviations in the consistency of the finished product size.

[0006] The technical solutions of the present invention are as follows:

[0007] A mold for producing PET plastic steel strips, comprising a front mold and a back mold, and further comprising:

[0008] A main flow channel and a secondary flow channel, wherein the front mold is provided with the main flow channel, the rear mold is provided with the secondary flow channel, and the tail end of the main flow channel corresponds to the secondary flow channel;

[0009] A mold cavity, wherein a plurality of mold cavities for flow diversion are arranged at equal distances at the lower part of the secondary flow channel;

[0010] A flow adjustment component, wherein a plurality of the flow adjustment components are installed on the rear mold, and the plurality of the flow adjustment components correspond one-to-one to the plurality of the mold cavities, and are used to adjust the flow;

[0011] A disassembly assembly component is installed at the bottom of the front mold and the bottom of the rear mold, and the disassembly assembly component at the bottom of the front mold is adapted to the disassembly assembly component at the bottom of the rear mold;

[0012] A guide assembly, wherein a plurality of guide assemblies are installed on the disassembly assembly, wherein the plurality of guide assemblies correspond one to one with the plurality of mold cavities and are used for guiding out the plastic-steel strips, and the disassembly assembly is used for installing the guide assemblies.

[0013] In addition to the above solutions, it also includes:

[0014] First mounting holes, a plurality of first mounting holes are evenly spaced on both sides of the front mold and both sides of the rear mold, and the plurality of first mounting holes on the front mold correspond one-to-one with the plurality of first mounting holes on the rear mold;

[0015] Second mounting holes, a plurality of second mounting holes are provided at equal distances on the upper portion of the front mold and the upper portion of the rear mold, and the plurality of second mounting holes on the front mold correspond one-to-one to the plurality of second mounting holes on the rear mold;

[0016] First bolts, each of which is installed between the plurality of first mounting holes on the front mold and the plurality of first mounting holes on the rear mold;

[0017] Second bolts are installed between the plurality of second mounting holes on the front mold and the plurality of second mounting holes on the rear mold.

[0018] On the basis of the above solution, the mold cavity includes a three-level flow channel, and a plurality of the three-level flow channels are arranged at equal distances below the secondary flow channel;

[0019] The three-level flow channels are sequentially arranged downwards to form a guide section, a connecting section, a buffer section and a forming section.

[0020] Based on the above solution, the flow adjustment component includes:

[0021] A third mounting hole, wherein a plurality of the third mounting holes are opened on the top of the rear mold, and the plurality of the third mounting holes correspond one-to-one to the plurality of the third-level flow channels;

[0022] A regulating valve needle is slidably and sealingly installed in each of the third mounting holes, and the bottom of the regulating valve needle is set to be conical;

[0023] A driving member, each of the third mounting holes is provided with the driving member, the driving member is fixedly mounted on the rear mold, and the output end of the driving member is fixedly connected to the regulating valve needle;

[0024] A monitoring part is installed inside each of the connecting sections and is used to monitor the flow state of the melt in each of the three-level flow channels.

[0025] On the basis of the above solution, the monitoring unit includes a pressure sensor and a temperature sensor, and the pressure sensor and the temperature sensor are installed inside each of the three-stage flow channels, and the pressure sensor and the temperature sensor are located in the connecting section.

[0026] Based on the above solution, the disassembly and assembly components include:

[0027] A stop block, the stop block being fixedly mounted on the bottom of the front mold;

[0028] The mounting portion is installed on the bottom of the front mold and the bottom of the rear mold, and is used to install the guide assembly.

[0029] On the basis of the above solution, the mounting portion includes a slide rail, and the slide rail includes a first slide rail and a second slide rail. A plurality of the first slide rails are fixedly mounted at equal distances on the bottom of the rear mold, and the three-stage flow channel is provided between every two of the first slide rails. A plurality of the second slide rails are fixedly mounted on the bottom of the front mold, and one end of the plurality of the second slide rails corresponds to and abuts against the plurality of the first slide rails one by one, and the other end of the plurality of the second slide rails is fixedly connected to the stop block.

[0030] A slide groove is provided on one side of each of the first slide rails and each of the second slide rails close to the third-level flow channel.

[0031] On the basis of the above solution, the flow guide assembly includes:

[0032] A displacement frame is slidably mounted between each two of the slide rails, and the displacement frame is slidably engaged with the slide groove;

[0033] A guide frame, wherein each displacement frame is slidably mounted with the guide frame;

[0034] Each of the guide frames is provided with a guide groove, and a plurality of the guide grooves correspond to and fit with a plurality of the three-stage flow channels one by one. A guide frame is also fixedly provided on the top of each guide frame, and the bottoms of the front mold and the rear mold are both fitted with the guide frame.

[0035] A position adjustment portion is installed at the bottom of each displacement rack to adjust the position of the guide rack.

[0036] On the basis of the above solution, the position adjustment unit includes:

[0037] Fixing nuts, two of which are symmetrically and fixedly installed at the bottom of each displacement rack;

[0038] An adjusting screw is threadedly provided on each of the fixing nuts, and the tail end of the adjusting screw is rotatably connected to the guide frame.

[0039] The working principle and beneficial effects of the present invention are:

[0040] 1. In the present invention, the flow state of the melt in each tertiary flow channel is monitored by setting a pressure sensor and a temperature sensor, and the driving member at the corresponding position is controlled to move, thereby adjusting the position of the regulating valve needle and controlling the cross-sectional area of ​​the input end of the tertiary flow channel, thereby improving the uniformity of the flow of multiple tertiary flow channels. Since the bottom of the regulating valve needle is set to be conical, the influence on the flow efficiency of the melt is reduced, ensuring the balance of the multi-channel flow.

[0041] 2. In the present invention, the displacement frame is moved between the two first slide rails at the installation position, so that the two sides of the displacement frame are aligned with the slide grooves, and then the displacement frame is sent into the first slide rails on both sides of the corresponding position, and then the displacement frame is pushed to move until the displacement frame moves to the specified position. At this time, the guide groove on the guide frame corresponds to the molding section, and then the position of the guide frame is adjusted by setting the adjusting screws until the guide frame abuts against the front mold and the rear mold. Through the setting of the guide frame, the sealing and stability of the docking position between the guide groove and the molding section are further improved, thereby improving the production quality and facilitating the replacement of different displacement frames according to production requirements, thereby realizing the function of quickly switching product specifications.

[0042] 3. In the present invention, the flow uniformity of multiple three-level flow channels is improved by setting the flow adjustment component, and the problems of clogging and uneven flow caused by traditional adjusting screws are reduced. By coordinating the disassembly and assembly components with the guide components, the guide components can be pulled out and pushed in conveniently, thereby achieving the purpose of quickly replacing different guide components and facilitating the replacement of guide components for products of different specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0044] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0045] Figure 2 It is a schematic diagram of a three-dimensional structure of a cross-section of the cooperation between the first bolt and the second bolt in the present invention;

[0046] Figure 3This is a schematic diagram of the overall structure from another angle in the present invention;

[0047] Figure 4 It is a schematic diagram of a three-dimensional structure of a cross-section in the present invention;

[0048] Figure 5 It is a cross-sectional structural diagram of the cooperation between the mold cavity and the flow adjustment component in the present invention;

[0049] Figure 6 For the present invention Figure 5 A schematic diagram of the partially enlarged structure at point A in the middle;

[0050] Figure 7 Schematic diagram of the cross-sectional structure of the front mold, rear mold and guide assembly in the present invention;

[0051] Figure 8 It is a schematic structural diagram of a cross-section of the flow guide assembly in the present invention.

[0052] In the figure: 1. front mold; 2. rear mold; 3. main flow channel; 4. secondary flow channel; 5. first mounting hole; 6. second mounting hole; 7. first bolt; 8. second bolt; 9. tertiary flow channel; 901. guide section; 902. connecting section; 903. buffer section; 904. forming section; 10. third mounting hole; 11. regulating valve needle; 12. driving part; 13. pressure sensor; 14. temperature sensor; 15. shift block; 16. first slide rail; 17. second slide rail; 18. slide groove; 19. displacement frame; 20. guide frame; 21. guide groove; 22. guide frame; 23. fixing nut; 24. adjusting screw. DETAILED DESCRIPTION

[0053] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0054] like Figures 1 to 8 As shown, this embodiment proposes a mold for producing PET plastic steel strips, including a front mold 1 and a rear mold 2, and also includes a main channel 3, a secondary channel 4, a mold cavity, a flow adjustment component, a disassembly component and a guide component. The front mold 1 is provided with a main channel 3, and the rear mold 2 is provided with a secondary channel 4. The tail end of the main channel 3 corresponds to the secondary channel 4, and a number of mold cavities for diversion are equidistantly arranged at the bottom of the secondary channel 4. The mold cavity includes a tertiary channel 9, and a number of tertiary channels 9 are equidistantly arranged at the bottom of the secondary channel 4, wherein the tertiary channel 9 is arranged downward in sequence as a guide section 901, a connecting section 902, a buffer section 903 and a molding section 904.

[0055] Among them, the guide section 901 is set to be conical to facilitate the concentration of the melt, and the buffer section 903 is set to be arc-shaped, so that it plays a buffering role when the melt enters the buffer section 903, which is beneficial to the extrusion molding of the melt by the molding section 904. The molding section 904 and the connecting section 902 are used to provide a channel for melt extrusion.

[0056] Specifically, when using the mold, first dock the front mold 1 and the rear mold 2 together and ensure the sealing, and then connect the two together. After installation, put the PET particles into the extruder, and melt the PET particles into a uniform melt through the rotation of the screw. Then, the melt is sent into the main channel 3. The melt entering the main channel 3 passes through the secondary flow channel 4, the tertiary flow channel 9 and the guide component in turn to be initially formed, leaving the front mold 1 and the rear mold 2, and then the initially formed plastic-steel belt enters the cold water tank to cool it, so as to stabilize its size, and synchronously control the traction speed through the frequency conversion motor to ensure that the tension of the plastic-steel belt is uniform, and then it is cut into segments at a determined length to complete production.

[0057] Among them, by replacing different guide components, the production of plastic-steel belts of different sizes and specifications can be achieved.

[0058] Among them, it also includes a first mounting hole 5, a second mounting hole 6, a first bolt 7 and a second bolt 8. Several first mounting holes 5 are evenly spaced on both sides of the front mold 1 and both sides of the back mold 2. The several first mounting holes 5 on the front mold 1 correspond one-to-one to the several first mounting holes 5 on the back mold 2. Several second mounting holes 6 are evenly spaced on the upper part of the front mold 1 and the upper part of the back mold 2. The several second mounting holes 6 on the front mold 1 correspond one-to-one to the several second mounting holes 6 on the back mold 2. First bolts 7 are installed between the several first mounting holes 5 on the front mold 1 and the several first mounting holes 5 on the back mold 2, and second bolts 8 are installed between the several second mounting holes 6 on the front mold 1 and the several second mounting holes 6 on the back mold 2. When the front mold 1 and the back mold 2 need to be docked together, the first mounting holes 5 and the second mounting holes 6 on the front mold 1 correspond to the first mounting holes 5 and the second mounting holes 6 on the back mold 2. At this time, the front mold 1 and the back mold 2 can be installed together by setting the first bolts 7 and the second bolts 8.

[0059] like Figures 4 to 6As shown, several flow adjustment components are installed on the rear mold 2, and the several flow adjustment components correspond one-to-one to the several mold cavities. The flow adjustment components include a third mounting hole 10, a regulating valve needle 11, a driving member 12 and a monitoring part. Several third mounting holes 10 are opened on the top of the rear mold 2, and the several third mounting holes 10 correspond one-to-one to the several tertiary flow channels 9. An regulating valve needle 11 is slidably and sealed installed inside each third mounting hole 10, and the bottom of the regulating valve needle 11 is set to a cone. A driving member 12 is provided on each third mounting hole 10, and the driving member 12 is set to a servo electric cylinder. The driving member 12 is fixedly mounted on the rear mold 2, and the output end of the driving member 12 is fixedly connected to the regulating valve needle 11. A monitoring part is installed inside each connecting section 902 for monitoring the melt flow state in each tertiary flow channel 9.

[0060] Specifically, when adjusting the flow rate of melt extrusion, the flow state of the melt in each tertiary flow channel 9 is monitored through the setting of the monitoring unit, and the driving member 12 at the corresponding position is controlled to operate, thereby adjusting the position of the regulating valve needle 11 and controlling the cross-sectional area of ​​the input end of the tertiary flow channel 9, thereby improving the uniformity of the flow rate of multiple tertiary flow channels 9. Since the bottom of the regulating valve needle 11 is set to be conical, the impact on the flow efficiency of the melt is reduced.

[0061] The above, such as Figure 5 As shown, the monitoring unit includes a pressure sensor 13 and a temperature sensor 14 . The pressure sensor 13 and the temperature sensor 14 are installed inside each tertiary flow channel 9 . The pressure sensor 13 and the temperature sensor 14 are located in the connecting section 902 .

[0062] Specifically, when the melt flows through the tertiary flow channel 9, the pressure sensor 13 and the temperature sensor 14 monitor the melt flowing through in real time. A signal transmitter is provided on each of the pressure sensor 13 and the temperature sensor 14, and the drive member 12 is connected to an external controller. The controller receives the sensor signal and transmits a signal to the drive member 12 at the corresponding position when it senses that the flow rate and other data of the melt have changed. The position of the regulating valve needle 11 is adjusted by the drive member 12, thereby adjusting the flow of the melt.

[0063] like Figures 3 to 5 As shown, the bottom of the front mold 1 and the rear mold 2 are both installed with disassembly and assembly components, and the disassembly and assembly components at the bottom of the front mold 1 are adapted to the disassembly and assembly components at the bottom of the rear mold 2. The disassembly and assembly components include a stop block 15 and a mounting portion. The stop block 15 is fixedly installed at the bottom of the front mold 1, and the bottom of the front mold 1 and the bottom of the rear mold 2 are both installed with mounting portions for installing the guide assembly.

[0064] Specifically, when installing the displacement frame 19 and the guide frame 20, first place the displacement frame 19 into the specified position at the lower part of the rear mold 2 through the installation part, and then move the displacement frame 19 until one end of the displacement frame 19 contacts the stop block 15. At this time, the displacement frame 19 moves between the front mold 1 and the rear mold 2, and the guide frame 20 on the displacement frame 19 is in the working position. The displacement frame 19 can be tightly abutted against the front mold 1 and the rear mold 2 by the setting of the adjustment part, and the position of the displacement frame 19 can be fixed by cooperating with the installation part.

[0065] The above, such as Figures 3 to 5 As shown, the mounting portion includes a slide rail, and the slide rail includes a first slide rail 16, a second slide rail 17 and a slide groove 18. Several first slide rails 16 are fixedly installed at equal distances on the bottom of the rear mold 2, and a three-level flow channel 9 is arranged between every two first slide rails 16. Several second slide rails 17 are fixedly installed on the bottom of the front mold 1, and one end of the several second slide rails 17 corresponds to and abuts against the several first slide rails 16 one by one, and the other end of the several second slide rails 17 is fixedly connected to the shift block 15. A slide groove 18 is provided on the side of each first slide rail 16 and each second slide rail 17 close to the three-level flow channel 9.

[0066] Specifically, when installing the displacement frame 19 and the guide frame 20, the displacement frame 19 is moved between the two first slide rails 16 at the installation position, so that the two sides of the displacement frame 19 are aligned with the slide grooves 18, and then the displacement frame 19 is sent into the first slide rails 16 on both sides of the corresponding position, and then the displacement frame 19 is pushed to move until the displacement frame 19 moves between the front mold 1 and the rear mold 2, and the front end of the displacement frame 19 contacts the second slide rail 17 at the corresponding position and abuts against the stop block 15, it can be determined that it has moved to the specified position, and then the displacement frame 19 can be fixed.

[0067] like Figure 7 、 Figure 8 As shown, several guide assemblies are installed on the disassembly and assembly assembly, and several guide assemblies correspond one-to-one to several mold cavities, which are used to guide out the plastic-steel strip. The disassembly and assembly assembly is used to install the guide assembly. The guide assembly includes a displacement frame 19, a guide frame 20 and an adjustment part. A displacement frame 19 is slidably installed between every two slide rails. The displacement frame 19 slides with the slide groove 18. A guide frame 20 is slidably installed on each displacement frame 19. A guide groove 21 is provided on each guide frame 20. The size and shape of the guide groove 21 need to be selected according to actual conditions. Several guide grooves 21 correspond one-to-one and are adapted to several tertiary flow channels 9. A guide frame 22 is also fixed on the top of each guide frame 20. The bottom of the front mold 1 and the rear mold 2 are adapted to the guide frame 22. An adjustment part is installed at the bottom of each displacement frame 19 for adjusting the position of the guide frame 20.

[0068] Specifically, when the displacement frame 19 moves to the bottom of the molding section 904 corresponding to the third-level runner 9, the guide groove 21 on the guide frame 20 corresponds to the molding section 904. At this time, the guide frame 20 is pushed to be fine-tuned through the setting of the adjustment part until the guide frame 20 abuts against the front mold 1 and the rear mold 2. The setting of the guide frame 22 further improves the sealing and stability of the docking position between the guide groove 21 and the molding section 904, thereby improving the production quality. After the melt passes through the molding section 904 and enters the guide groove 21, the size and shape of the extruded melt can be restricted by the setting of the guide groove 21, thereby realizing the production of products of different sizes or shapes, and conveniently and quickly replacing the guide frames 20 used to produce different products.

[0069] The above, such as Figure 7 、 Figure 8 As shown, the adjustment part includes a fixing nut 23 and an adjusting screw 24. Two fixing nuts 23 are symmetrically and fixedly installed at the bottom of each displacement frame 19. An adjusting screw 24 is threaded on each fixing nut 23, and the tail end of the adjusting screw 24 is rotatably connected to the guide frame 20.

[0070] Specifically, when adjusting the position of the guide frame 20, turn the adjusting screw 24 at the bottom of the displacement frame 19. Under the action of the fixing nut 23, the adjusting screw 24 can move along the axial direction of the adjusting screw 24, thereby adjusting the position of the guide frame 20 by setting the adjusting screw 24.

[0071] The working principle or usage process of this application is as follows:

[0072] When producing plastic-steel strips, the front mold 1 and the rear mold 2 are first butted together and the sealing is ensured. At this time, the first mounting hole 5 and the second mounting hole 6 on the front mold 1 correspond to the first mounting hole 5 and the second mounting hole 6 on the rear mold 2. At this time, the front mold 1 and the rear mold 2 can be installed together by setting the first bolt 7 and the second bolt 8.

[0073] After installation, the PET particles are placed in the extruder, and the PET particles are melted into a uniform melt by the rotation of the screw, and then the melt is sent into the main channel 3. The melt entering the main channel 3 passes through the secondary flow channel 4, the tertiary flow channel 9 and the guide groove 21 in turn to be initially formed, leaving the front mold 1 and the rear mold 2, and then the initially formed plastic-steel belt enters the cold water tank to cool it, so as to stabilize the size, and synchronously control the traction speed through the frequency conversion motor to ensure that the tension of the plastic-steel belt is uniform, and then it is cut into segments at a determined length to complete the production.

[0074] When installing the guide frame 20, the displacement frame 19 is moved between the two first slide rails 16 of the installation position, so that the two sides of the displacement frame 19 are aligned with the slide grooves 18, and then the displacement frame 19 is sent into the first slide rails 16 on both sides of the corresponding position, and then the displacement frame 19 is pushed to move until the displacement frame 19 moves between the front mold 1 and the rear mold 2, and the front end of the displacement frame 19 contacts the second slide rail 17 at the corresponding position and abuts against the stop block 15, it can be determined that it has moved to the specified position. At this time, the guide groove 21 on the guide frame 20 corresponds to the molding section 904, and then the adjusting screw 24 at the bottom of the displacement frame 19 is turned. Under the action of the fixing nut 23, the adjusting screw 24 can be moved along the axial direction of the adjusting screw 24, so that the position of the guide frame 20 is adjusted by the setting of the adjusting screw 24 until the guide frame 20 abuts against the front mold 1 and the rear mold 2. Through the setting of the guide frame 22, the sealing and stability of the docking position between the guide groove 21 and the molding section 904 are further improved, thereby improving the production quality.

[0075] When the melt flows through the tertiary flow channel 9, the pressure sensor 13 and the temperature sensor 14 monitor the melt flowing through in real time. A signal transmitter is provided on each of the pressure sensor 13 and the temperature sensor 14, and the drive member 12 is connected to an external controller. The controller receives the sensor signal. When it senses that the flow rate and other data of the melt have changed, it transmits a signal to the drive member 12 at the corresponding position, thereby adjusting the position of the regulating valve needle 11 through the drive member 12, and controlling the cross-sectional area of ​​the input end of the tertiary flow channel 9, so as to achieve the purpose of adjusting the flow of the melt and improve the uniformity of the flow rate of multiple tertiary flow channels 9. Since the bottom of the regulating valve needle 11 is set to be conical, the impact on the flow efficiency of the melt is reduced.

[0076] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A mold for producing PET plastic steel strips, comprising a front mold (1) and a rear mold (2), characterized in that: Also includes: A main flow channel (3) and a secondary flow channel (4), wherein the front mold (1) is provided with the main flow channel (3), the rear mold (2) is provided with the secondary flow channel (4), and the tail end of the main flow channel (3) corresponds to the secondary flow channel (4); A mold cavity, wherein a plurality of mold cavities for flow diversion are arranged at equal distances at the lower part of the secondary flow channel (4); A flow adjustment component, wherein a plurality of the flow adjustment components are installed on the rear mold (2), and the plurality of the flow adjustment components correspond to the plurality of the mold cavities one by one, and are used to adjust the flow; A disassembly assembly component is installed at the bottom of the front mold (1) and the bottom of the rear mold (2), and the disassembly assembly component at the bottom of the front mold (1) is adapted to the disassembly assembly component at the bottom of the rear mold (2); A guide assembly, wherein the disassembly assembly is provided with a plurality of guide assemblies, wherein the guide assemblies correspond one to one with the plurality of cavities, and are used to guide the plastic-steel strip, and the disassembly assembly is used to install the guide assembly; The mold cavity comprises a three-stage flow channel (9), and a plurality of the three-stage flow channels (9) are arranged at equal distances below the secondary flow channel (4); The flow adjustment component includes a third mounting hole (10), a plurality of the third mounting holes (10) are opened on the top of the rear mold (2), and the plurality of the third mounting holes (10) correspond one-to-one to the plurality of the third-level flow channels (9); A regulating valve needle (11), wherein the regulating valve needle (11) is slidably and sealingly mounted inside each of the third mounting holes (10), and the bottom of the regulating valve needle (11) is configured to be conical; The cone is geometrically shaped so that its generatrix intersects the axis of rotation; A stop block (15), the stop block (15) being fixedly mounted on the bottom of the front mold (1); A mounting portion, the bottom of the front mold (1) and the bottom of the rear mold (2) are both equipped with the mounting portion, for mounting the guide assembly; The mounting portion includes a slide rail, and the slide rail includes a first slide rail (16) and a second slide rail (17). A plurality of the first slide rails (16) are fixedly installed at an equal distance on the bottom of the rear mold (2), and the three-stage flow channel (9) is provided between every two of the first slide rails (16). A plurality of the second slide rails (17) are fixedly installed on the bottom of the front mold (1), and one end of the plurality of the second slide rails (17) corresponds to and abuts against the plurality of the first slide rails (16), and the other end of the plurality of the second slide rails (17) is fixedly connected to the stop block (15); A slide groove (18), each of the first slide rails (16) and each of the second slide rails (17) is provided with a slide groove (18) on one side close to the third-level flow channel (9); The flow guide assembly includes: A displacement frame (19), wherein the displacement frame (19) is slidably mounted between each two of the slide rails, and the displacement frame (19) is slidably engaged with the slide groove (18); A flow guide frame (20), wherein each displacement frame (19) is slidably mounted with the flow guide frame (20); A position adjustment portion, the bottom of each displacement frame (19) is equipped with the position adjustment portion, which is used to adjust the position of the guide frame (20); Each of the guide frames (20) is provided with a guide groove (21), and a plurality of the guide grooves (21) correspond to and fit with a plurality of the three-stage flow channels (9) one by one. A guide frame (22) is also fixedly provided on the top of each of the guide frames (20), and the bottoms of the front mold (1) and the rear mold (2) are both fitted with the guide frame (22).

2. A PET plastic steel strip production mold according to claim 1, characterized in that: Also includes: First mounting holes (5), a plurality of first mounting holes (5) are evenly spaced on both sides of the front mold (1) and both sides of the rear mold (2), and the plurality of first mounting holes (5) on the front mold (1) correspond one to one with the plurality of first mounting holes (5) on the rear mold (2); Second mounting holes (6), a plurality of second mounting holes (6) are provided at equal distances on the upper portion of the front mold (1) and the upper portion of the rear mold (2), and the plurality of second mounting holes (6) on the front mold (1) correspond one to one with the plurality of second mounting holes (6) on the rear mold (2); First bolts (7), each of the first bolts (7) being installed between the plurality of first mounting holes (5) on the front mold (1) and the plurality of first mounting holes (5) on the rear mold (2); Second bolts (8), each of which is installed between the plurality of second mounting holes (6) on the front mold (1) and the plurality of second mounting holes (6) on the rear mold (2).

3. A PET plastic steel strip production mold according to claim 2, characterized in that: The three-stage flow channel (9) is sequentially arranged downwards to form a flow guide section (901), a connecting section (902), a buffer section (903) and a forming section (904).

4. A PET plastic steel strip production mold according to claim 3, characterized in that: The flow adjustment component further includes: A driving member (12), each of the third mounting holes (10) is provided with the driving member (12), the driving member (12) is fixedly mounted on the rear mold (2), and the output end of the driving member (12) is fixedly connected to the regulating valve needle (11); A monitoring unit is installed inside each of the connecting sections (902) and is used to monitor the flow state of the melt in each of the three-stage flow channels (9).

5. A PET plastic steel strip production mold according to claim 4, characterized in that: The monitoring unit includes a pressure sensor (13) and a temperature sensor (14). The pressure sensor (13) and the temperature sensor (14) are installed inside each of the three-stage flow channels (9). The pressure sensor (13) and the temperature sensor (14) are located in the connecting section.

6. A PET plastic steel strip production mold according to claim 5, characterized in that: The position adjustment unit includes: A fixing nut (23), wherein two fixing nuts (23) are symmetrically and fixedly mounted on the bottom of each displacement frame (19); An adjusting screw (24) is threadedly provided on each of the fixing nuts (23), and a tail end of the adjusting screw (24) is rotatably connected to the guide frame (20).

Images