A thermoplastic polyurethane material blow molding cooling device and blow molding equipment

Abstract

The invention discloses a thermoplastic polyurethane material blow molding cooling device and blow molding equipment, which comprises a blow molding mold and a first air source part, wherein the blow molding mold is provided with a blow molding cavity and an air flow cavity annularly arranged outside the blow molding cavity, and a cavity wall part is arranged between the blow molding cavity and the air flow cavity; the first air source part is communicated with the air flow cavity for inputting a first air flow with a microorganism capsule; the cavity wall part is provided with a permeation channel communicating the blow molding cavity and the air flow cavity; a metal deformation part whose bending degree is positively correlated with temperature is arranged in the air flow cavity, and the metal deformation part is at least configured with a first curvature at a first temperature and a second curvature at a second temperature; when the temperature is lower than the second temperature, the curvature of the metal deformation part is reduced, and the metal deformation part is separated from the annular cavity wall part and is arranged at intervals, so that the first air source part can be communicated with the air flow cavity, the permeation channel and the blow molding cavity in sequence, and the microorganism capsule is infiltrated into them in the form of heat permeation, so as to meet the performance requirements and environmental protection requirements of plastic products.

Description

Technical Field

[0001] The invention relates to the technical field of plastic molding, in particular to a thermoplastic polyurethane material blow molding cooling device and blow molding equipment. Background Art

[0002] Plastic molding technology is an extremely important part of modern industry. It heats plastic materials to make them flow, then forms them through molds and cools them to set. It is widely used in medical equipment, automotive parts, aviation equipment parts and other fields. With the increasing attention paid to environmental issues around the world, the environmental problems faced by plastic products are becoming increasingly prominent. For example, thermoplastic polyurethane materials (TPU for short) are non-degradable, making them difficult to decompose in the natural environment, and gradually accumulate to cause "white pollution."

[0003] In order to deal with the environmental hazards of plastic waste, some improved technical solutions have been proposed in recent years, such as centralized recycling and treatment methods such as biodegradation, photodegradation, and chemical degradation. The above technical solutions require screening out plastic products from a large amount of garbage or sorting out plastic products through garbage sorting, and then these plastic products are centrally treated. However, these centralized treatment technologies face a fundamental problem, that is, they cannot completely cover all plastic products; many plastic products are widely distributed and small in size, making it difficult to completely treat them through centralized recycling, resulting in a considerable amount of plastic still remaining in the environment, thereby continuing to pollute the soil, water bodies and wildlife.

[0004] Based on this, those skilled in the art have also proposed some technical solutions for plastic products themselves, so that plastic products can be automatically degraded in the natural environment without complicated centralized treatment. For example, polylactic acid material (abbreviated as PLA) is more degradable than thermoplastic polyurethane material, but compared with thermoplastic polyurethane material, its heat resistance, toughness and other parameters are poor, and it is not suitable for use in high-intensity or harsh environments. Therefore, it is necessary to develop a new plastic molding equipment to meet the performance requirements and environmental protection requirements of plastic products at the same time. Summary of the invention

[0005] The purpose of the present invention is to provide a thermoplastic polyurethane material blow molding cooling device and blow molding equipment to solve the technical problem that the plastic molding means in the prior art is difficult to simultaneously meet the performance requirements and environmental protection requirements of plastic products.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A thermoplastic polyurethane material blow molding cooling device comprises a blow molding mold and a first air source part, wherein the blow molding mold is provided with a columnar blow molding cavity and an air flow cavity arranged outside the blow molding cavity, and a cavity wall part is arranged between the blow molding cavity and the air flow cavity; the first air source part is connected with the air flow cavity and is used to input a first air flow with a microorganism capsule;

[0008] The cavity wall is provided with a permeable channel connecting the blow molding cavity and the airflow cavity; a metal deformation portion whose bending degree is positively correlated with temperature is provided in the airflow cavity, and the metal deformation portion is at least configured with a first curvature at a first temperature and a second curvature at a second temperature;

[0009] At a first temperature, the metal deformation portion is in contact with the cavity wall portion with a first curvature; at a second temperature, the metal deformation portion is spaced apart from the cavity wall portion with a first spacing, so that the first air source portion can be connected with the airflow cavity, the permeation channel and the blow molding cavity in sequence; wherein the second temperature is lower than the inactivation temperature of the microbial capsule.

[0010] Optionally, a first positioning block and a second positioning block are provided at a position corresponding to the metal deformation portion in the blow molding cavity, and the first positioning block and the second positioning block are both provided at a side of the metal deformation portion away from the cavity wall portion;

[0011] At a first temperature, the first positioning block, the second positioning block and the blow molding cavity form a trapezoidal groove, and the metal deformation portion is at least partially located between the trapezoidal groove and the cavity wall portion;

[0012] At a second temperature, the first positioning block and the second positioning block are squeezed and deformed or displaced by the metal deformation portion of the second curvature to leave a gap of a second spacing between them and the cavity wall portion, and the second spacing is greater than the first spacing.

[0013] Optionally, a first movable groove is formed in the cavity wall of the airflow cavity at a position corresponding to the first positioning block, and a second movable groove is formed at a position corresponding to the second positioning block, the first positioning block is slidably connected to the first movable groove along a direction away from or close to the cavity wall, and the second positioning block is slidably connected to the second movable groove along a direction away from or close to the cavity wall;

[0014] A first spring is arranged in the first movable groove, one end of the first spring abuts against the bottom wall of the first movable groove, and the other end of the first spring abuts against the first positioning block; a second spring is arranged in the second movable groove, one end of the second spring abuts against the bottom wall of the second movable groove, and the other end of the second spring abuts against the second positioning block.

[0015] Optionally, the metal deformation portion includes a deformation middle portion arranged corresponding to the groove bottom wall of the trapezoidal groove, the deformation middle portion is connected with a deformation transition portion corresponding to the groove side walls of the trapezoidal groove, and the end of the deformation transition portion is connected with a deformation end portion; a magnetic attraction portion is arranged in the airflow cavity, and the magnetic attraction portion is used to magnetically attract the deformation end portion at the second temperature;

[0016] At a first temperature, the deformed middle portion, the deformed transition portion, and the deformed end portion are all in contact with the cavity wall portion, and the magnetic attraction portion is separated from the deformed end portion;

[0017] At the second temperature, the deformation middle part, the deformation transition part and the deformation end part all have gaps with the cavity wall part, and the gaps gradually increase; the potential energy of the first spring and the second spring increases, and the magnetic attraction part is magnetically connected to the deformation end part.

[0018] Optionally, the metal deformation portion includes a deformation middle portion arranged corresponding to the groove bottom wall of the trapezoidal groove, the deformation middle portion is connected with a deformation transition portion corresponding to the groove side walls of the trapezoidal groove, and the end of the deformation transition portion is connected with a deformation end portion; the surface of the deformation middle portion facing the cavity wall portion is provided with an air guide groove;

[0019] At the first temperature, the deformed middle portion, the deformed transition portion and the deformed end portion are all in contact with the cavity wall portion; the air guide groove is closed by the cavity wall portion;

[0020] At the second temperature, the end of the deformation middle part, the deformation transition part and the deformation end part all have gaps with the cavity wall part, and the gaps gradually increase; one end of the air guide groove is connected to the gap between one deformation transition part and the cavity wall part, and the other end of the air guide groove is connected to the gap between another deformation transition part and the cavity wall part.

[0021] Optionally, a first air inlet channel is opened in the blow molding mold, and the first air inlet channel connects the first air source part and the air flow cavity; a first switch valve assembly is also provided in the blow molding mold, and the first switch valve assembly is used to block the first air inlet channel at a first temperature and connect the first air inlet channel at a second temperature.

[0022] Optionally, the first air inlet channel comprises a first channel and a second channel which are staggered, and a first movable valve chamber is connected between the first channel and the second channel; the first channel is connected to the first air source, and the second channel is connected to the airflow chamber;

[0023] The first switch valve assembly includes a first valve plate movable in the first movable valve chamber, the first valve plate is connected to the first positioning block via a first rod; the first valve plate is used to block the second channel at a first temperature.

[0024] Optionally, a second air inlet channel is opened in the blow molding mold, and the second air inlet channel connects the second air source part with the airflow cavity, and the second air source part is used to input a second airflow; the blow molding mold is also provided with a second switch valve assembly, and the second switch valve assembly is used to block the second air inlet channel at a second temperature and connect the second air inlet channel at a first temperature.

[0025] Optionally, the second air inlet channel comprises a third channel and a fourth channel which are staggered, a second movable valve chamber is connected between the third channel and the fourth channel, the third channel is connected to the second air source, and the fourth channel is connected to the airflow chamber;

[0026] The second switch valve assembly includes a second valve plate movable in the second movable valve chamber, the second valve plate is connected to the second positioning block via a second rod, and the second valve plate is used to block the third channel at a second temperature.

[0027] A blow molding device comprises a mold base forming device, a blowing device, a translation device and the thermoplastic polyurethane material blow molding cooling device as described above, wherein the thermoplastic polyurethane material blow molding cooling device moves between the mold base forming device and the blowing device via the translation device.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The thermoplastic polyurethane material blow molding cooling device and blow molding equipment provided by the present invention have the following working principles in the thermoplastic polyurethane material molding process: the thermoplastic polyurethane material is pre-injection molded at a temperature higher than a first temperature, and is blown into shape after entering the blow molding cavity. During the cooling process, the temperature gradually decreases. When the temperature is lower than the second temperature, the curvature of the metal deformation part decreases, and it is separated from the annular cavity wall part and arranged at intervals, so that the first air source part can be connected with the air flow cavity, the permeation channel and the blow molding cavity in sequence, so that during the cooling process of the thermoplastic polyurethane material, microbial capsules can be infiltrated into the thermoplastic polyurethane material in the form of heat permeation, thereby obtaining a thermoplastic polyurethane product with composite microbial capsules, so that the thermoplastic polyurethane product can be naturally degraded when it is landfilled in the later stage. On the one hand, the thermoplastic polyurethane product meets the performance requirements, and on the other hand, the added microbial capsules enable the product to be naturally degraded. Therefore, the thermoplastic polyurethane material blow molding cooling device and blow molding equipment simultaneously meet the performance requirements and environmental protection requirements of plastic products. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0031] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention.

[0032] Figure 1 It is a schematic diagram of the overall structure of the blow molding equipment disclosed in the embodiment of the present invention;

[0033] Figure 2 It is a schematic diagram of a first partial structure of the blow molding equipment disclosed in an embodiment of the present invention;

[0034] Figure 3 A second partial schematic diagram of the blow molding equipment disclosed in an embodiment of the present invention;

[0035] Figure 4 It is a schematic diagram of the overall structure of a thermoplastic polyurethane material blow molding cooling device disclosed in an embodiment of the present invention;

[0036] Figure 5 It is a schematic diagram of a partial cross-sectional structure of a thermoplastic polyurethane material blow molding cooling device disclosed in an embodiment of the present invention;

[0037] Figure 6 It is a schematic diagram of a first top view cross-sectional structure of a thermoplastic polyurethane material blow molding cooling device disclosed in an embodiment of the present invention;

[0038] Figure 7 for Figure 6 A schematic diagram of the local enlarged structure at point A;

[0039] Figure 8 It is a second top view cross-sectional structural schematic diagram of the thermoplastic polyurethane material blow molding cooling device disclosed in an embodiment of the present invention;

[0040] Fig. 9 for Figure 8 A schematic diagram of the local enlarged structure at B;

[0041] Illustrations: 100, blow mold; 101, blow mold cavity; 1011, blow port; 102, air flow cavity; 103, cavity wall; 104, permeation channel; 105, first movable groove; 106, second movable groove; 107, first air inlet channel; 1071, first channel; 1072, second channel; 1073, first movable valve chamber; 108, second air inlet channel; 1081, third channel; 1082, fourth channel; 1083, second movable valve chamber; 109, exhaust channel;

[0042] 200, metal deformation part; 201, deformation middle part; 202, deformation transition part; 203, deformation end part; 204, filling column part; 301, trapezoidal groove; 310, first positioning block; 320, second positioning block; 330, first spring; 340, second spring; 400, magnetic attraction part;

[0043] 500, first switch valve assembly; 510, first valve plate; 520, first rod; 600, second switch valve assembly; 610, second valve plate; 611, air vent; 620, second rod; 700, mold base forming device; 800, inflation device; 900, translation device. DETAILED DESCRIPTION

[0044] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below 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 creative work are within the scope of protection of the present invention.

[0045] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally arranged component at the same time.

[0046] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0047] Embodiment 1:

[0048] The thermoplastic polyurethane material blow molding cooling device provided in the embodiment of the present invention is suitable for use in blow molding equipment for molding thermoplastic polyurethane products, which is equivalent to the mold itself. In this embodiment, by improving the structure of the thermoplastic polyurethane material blow molding cooling device, it is possible to add a substance for degradation during the molding process of the thermoplastic polyurethane product, so that the thermoplastic polyurethane product has the ability to degrade in the natural environment, thereby simultaneously meeting the performance requirements of plastic products and environmental protection requirements. In addition, the overall structure of the thermoplastic polyurethane material blow molding cooling device also has the requirements of compact structure and high stability, meeting various performance requirements in the blow molding process.

[0049] like Figure 4 and Figure 5 As shown, the thermoplastic polyurethane material blow molding cooling device in this embodiment includes a blow molding mold 100 and a first air source part (not shown in the figure). The blow molding mold 100 is provided with a columnar blow molding cavity 101. The contour of the blow molding cavity 101 matches the contour of the thermoplastic polyurethane product, so that after the blank is blown up, gas can be injected through the blowing port 1011 at the top of the blow molding cavity 101, so that the blank expands into a corresponding shape.

[0050] The blow molding mold 100 also includes an airflow cavity 102 arranged outside the blow molding cavity 101, and a cavity wall portion 103 is arranged between the blow molding cavity 101 and the airflow cavity 102; the first air source portion is connected to the airflow cavity 102, and is used to input a first airflow containing microorganism capsules. In this embodiment, the first air source portion refers to an air source device for conveying airflow into the blow molding mold 100, and is used to provide an airflow containing microorganism capsules so that the microorganism capsules can be infiltrated into the thermoplastic polyurethane product during the molding process. The power of the first air source portion includes but is not limited to structures such as air pumps, compressors, and fans. The way in which the first air source portion is doped with microorganism capsules includes but is not limited to means such as spraying and aerosols, and it is sufficient to form a first airflow containing microorganism capsules, which is not specifically limited in this embodiment.

[0051] The cavity wall 103 is provided with a permeable channel 104 connecting the blow molding cavity 101 and the air flow cavity 102; the air flow cavity 102 is provided with a metal deformation part 200 whose curvature is positively correlated with the temperature, and the metal deformation part 200 is configured with at least a first curvature at a first temperature and a second curvature at a second temperature. Wherein, at the first temperature, the metal deformation part 200 is in contact with the cavity wall 103 with the first curvature, and at this time, the first air flow cannot enter the blow molding cavity 101; at the second temperature, the curvature of the metal deformation part 200 is reduced to the second curvature, so that the metal deformation part 200 is spaced apart from the cavity wall 103 with a first spacing, so that the first air source part can be connected with the air flow cavity 102, the permeable channel 104 and the blow molding cavity 101 in sequence; wherein, the second temperature is lower than the inactivation temperature of the microbial capsule.

[0052] Specifically, the working principle of the thermoplastic polyurethane material molding process is as follows: the thermoplastic polyurethane material is pre-injection molded at a temperature higher than the first temperature, and is blown into shape after entering the blow molding cavity 101. During the cooling process, the temperature gradually decreases. When the temperature is lower than the second temperature, the curvature of the metal deformation part 200 decreases, and it is separated from the annular cavity wall part 103 and arranged at intervals, so that the first air source part can be connected with the air flow cavity 102, the permeation channel 104 and the blow molding cavity 101 in sequence, so that during the cooling process of the thermoplastic polyurethane material, the microbial capsules can be infiltrated into it in the form of heat penetration, thereby obtaining a thermoplastic polyurethane product with a composite microbial capsule, so that the thermoplastic polyurethane product can be naturally degraded when it is landfilled in the later stage. On the one hand, the thermoplastic polyurethane product meets the performance requirements, and on the other hand, the added microbial capsules enable the product to be naturally degraded. Therefore, the thermoplastic polyurethane material blow molding cooling device and blow molding equipment simultaneously meet the performance requirements and environmental protection requirements of plastic products. In addition, it should be noted that the metal deformation part 200 whose curvature is affected by temperature is used to stably achieve the penetration of the microbial capsule at the second temperature, effectively avoiding the inactivation of the microbial capsule at high temperature, thereby ensuring that the microbial capsule is not inactivated, thereby ensuring the stability of production.

[0053] On the basis of the above embodiment, the metal deformation part 200 includes two layers of metal plates, the thermal expansion coefficient of the inner metal plate close to the cavity wall part 103 is smaller than the thermal expansion coefficient of the outer metal plate away from the cavity wall part 103, and when the temperature rises, the deformation of the outer metal plate is greater than the deformation of the inner metal plate, so that the metal deformation part 200 bends toward the cavity wall part 103 and fits with the cavity wall part 103 at the first temperature. Accordingly, after the temperature drops, the thermoplastic polyurethane product is gradually formed, and the metal deformation part 200 is gradually separated from the cavity wall part 103, so that the first airflow can enter the blow molding cavity 101 to complete the penetration of the microbial capsule.

[0054] On the basis of the above embodiment, the microbial capsule can be Bacillus subtilis, and gelatin or other materials can be optionally wrapped around the outside of Bacillus subtilis. Among them, the inactivation temperature of Bacillus subtilis is close to 135 degrees, and the processing temperature of thermoplastic polyurethane is about 160 degrees. The first temperature can be set to 160 degrees and the second temperature can be set to 130 degrees. Then at 160 degrees, the thermoplastic polyurethane product begins to cool and set. At this time, Bacillus subtilis is not infiltrated into the thermoplastic polyurethane product to avoid inactivation of Bacillus subtilis; when the temperature drops to 130 degrees, the curvature of the metal deformation part 200 is reduced to the second curvature, so that the metal deformation part 200 is spaced from the cavity wall part 103 at a first spacing, so that the first air source part can be connected with the airflow cavity 102, the permeation channel 104 and the blow molding cavity 101 in sequence, which can ensure the activity of Bacillus subtilis infiltrated into the thermoplastic polyurethane product, thereby ensuring the quality of the thermoplastic polyurethane product.

[0055] Furthermore, if Figures 5 to 9 As shown, a first positioning block 310 and a second positioning block 320 are provided at the position corresponding to the metal deformation part 200 in the blow molding cavity 101, and the first positioning block 310 and the second positioning block 320 are both provided on the side of the metal deformation part 200 away from the cavity wall part 103; at a first temperature, the first positioning block 310, the second positioning block 320 and the blow molding cavity 101 form a trapezoidal groove 301, and the metal deformation part 200 is at least partially located between the trapezoidal groove 301 and the cavity wall part 103; at a second temperature, the first positioning block 310 and the second positioning block 320 are squeezed and deformed or squeezed and displaced by the metal deformation part 200 of the second curvature, so as to leave a gap of a second spacing between them and the cavity wall part 103, and the second spacing is greater than the first spacing, and the second spacing is the sum of the first spacing and the thickness of the metal deformation part 200.

[0056] It should be noted that the metal deformation part 200 with the first curvature is semi-circular, and the metal deformation part 200 with the second curvature is expanded relative to the metal deformation part 200 with the first curvature. Then, during the expansion of the metal deformation part 200, pressure will be applied to the first positioning block 310 and the second positioning block 320, forcing the first positioning block 310 and the second positioning block 320 to be squeezed and deformed or squeezed and displaced to leave deformation space for the metal deformation part 200, and finally a gap of the second spacing will be left between the positioning block and the cavity wall part 103.

[0057] In a preferred embodiment, the first positioning block 310 and the second positioning block 320 can be squeezed and displaced. Figure 8 and Fig. 9 As shown, a first movable groove 105 is provided on the cavity wall of the airflow cavity 102 at a position corresponding to the first positioning block 310, and a second movable groove 106 is provided at a position corresponding to the second positioning block 320. The first positioning block 310 is slidably connected to the first movable groove 105 along a direction away from or close to the cavity wall portion 103, and the second positioning block 320 is slidably connected to the second movable groove 106 along a direction away from or close to the cavity wall portion 103; a first spring 330 is provided in the first movable groove 105, one end of the first spring 330 abuts against the bottom wall of the first movable groove 105, and the other end of the first spring 330 abuts against the first positioning block 310; a second spring 340 is provided in the second movable groove 106, one end of the second spring 340 abuts against the bottom wall of the second movable groove 106, and the other end of the second spring 340 abuts against the second positioning block 320. Through the above arrangement, the positioning block can be squeezed by the extended metal deformation part 200 , thereby overcoming the elastic force of the spring and being partially received in the movable groove to leave a gap of the second spacing between the positioning block and the cavity wall part 103 .

[0058] As other optional implementations, Figure 6 and Figure 7As shown, one of the first positioning block 310 and the second positioning block 320 can be squeezed and deformed, and can also be squeezed by the extended metal deformation part 200 to leave a gap of the second spacing between the first positioning block 310 and the cavity wall part 103 .

[0059] On the basis of the preferred implementation mode, further, as Figures 5 to 9 As shown, the metal deformation part 200 includes a deformation middle part 201 arranged at the bottom wall of the groove corresponding to the trapezoidal groove 301, and the deformation middle part 201 is connected with a deformation transition part 202 corresponding to the groove side wall of the trapezoidal groove 301, and the end of the deformation transition part 202 is connected with a deformation end part 203; a magnetic attraction part 400 is arranged in the air flow cavity 102, and the magnetic attraction part 400 is used to magnetically attract the deformation end part 203 at the second temperature; at the first temperature, the deformation middle part 201, the deformation transition part 202 and the deformation end part 203 are all in contact with the cavity wall part 103, and the magnetic attraction part 400 is separated from the deformation end part 203; at the second temperature, the deformation middle part 201, the deformation transition part 202 and the deformation end part 203 are all spaced from the cavity wall part 103, and the gap gradually increases; the potential energy of the first spring 330 and the second spring 340 increases, and the magnetic attraction part 400 is magnetically connected to the deformation end part 203.

[0060] Exemplarily, at the second temperature, the metal deformation part 200 is close to a flat plate shape, and the magnetic force of the magnetic attraction part 400 overcomes the elastic force of the spring, so that the deformation end 203 of the metal deformation part 200 can be attracted, thereby leaving a gap of the second spacing between the metal deformation part 200 and the cavity wall part 103; at the first temperature, as the temperature rises, the curvature of the metal deformation part 200 continues to rise, and since the deformation middle part 201 is limited by the trapezoidal groove 301 and the cavity wall part 103, its deformation end 203 continues to rise. As the distance increases, the magnetic force decreases, causing the spring to release potential energy, so that the deformation middle part 201, the deformation transition part 202 and the deformation end 203 are all in contact with the cavity wall part 103.

[0061] On the basis of the preferred embodiment, as a supplementary embodiment, the metal deformation part 200 includes a deformation middle part 201 arranged corresponding to the bottom wall of the trapezoidal groove 301, the deformation middle part 201 is connected with a deformation transition part 202 corresponding to the groove side walls of the trapezoidal groove 301, and the end of the deformation transition part 202 is connected with a deformation end part 203; an air guide groove is opened on the surface of the deformation middle part 201 facing the cavity wall part 103.

[0062] Exemplarily, at a first temperature, the deformation middle portion 201, the deformation transition portion 202 and the deformation end portion 203 are all in contact with the cavity wall portion 103; the air guide groove is closed by the cavity wall portion 103; at a second temperature, the end of the deformation middle portion 201, the deformation transition portion 202 and the deformation end portion 203 have gaps with the cavity wall portion 103, and the gaps gradually increase; one end of the air guide groove is connected to the gap between one deformation transition portion 202 and the cavity wall portion 103, and the other end of the air guide groove is connected to the gap between another deformation transition portion 202 and the cavity wall portion 103.

[0063] Additionally, a filling column 204 may be protruding from the deformed end 203. At the first temperature, the filling column 204 can be inserted into the permeation channel 104, which can play a positioning role on the one hand, and maintain the contour of the blow molding cavity 101 on the other hand, thereby ensuring the quality of the thermoplastic polyurethane product.

[0064] Furthermore, a first air inlet channel 107 is provided in the blow mold 100, and the first air inlet channel 107 connects the first air source part and the air flow cavity 102; a first switch valve assembly 500 is also provided in the blow mold 100, and the first switch valve assembly 500 is used to block the first air inlet channel 107 at a first temperature and connect the first air inlet channel 107 at a second temperature. It should be supplemented that the blow mold 100 is also equipped with an exhaust channel 109, and the metal deformation part 200 is arranged between the exhaust channel 109 and the first air inlet channel 107.

[0065] Specifically, the first air inlet channel 107 includes a first channel 1071 and a second channel 1072 that are staggered, and a first movable valve chamber 1073 is connected between the first channel 1071 and the second channel 1072; the first channel 1071 is connected to the first air source, and the second channel 1072 is connected to the air flow chamber 102; the first switch valve assembly 500 includes a first valve plate 510 that can move in the first movable valve chamber 1073, and the first valve plate 510 is connected to the first positioning block 310 through a first rod body 520; the first valve plate 510 is used to block the second channel 1072 at a first temperature.

[0066] Furthermore, a second air inlet channel 108 is opened in the blow molding mold 100, and the second air inlet channel 108 connects the second air source part and the air flow cavity 102, and the second air source part is used to input the second air flow; a second switch valve assembly 600 is also provided in the blow molding mold 100, and the second switch valve assembly 600 is used to block the second air inlet channel 108 at the second temperature and connect the second air inlet channel 108 at the first temperature.

[0067] Specifically, the second air inlet channel 108 includes a third channel 1081 and a fourth channel 1082 which are arranged in an interlaced manner, and a second movable valve chamber 1083 is connected between the third channel 1081 and the fourth channel 1082, the third channel 1081 is connected to the second air source, and the fourth channel 1082 is connected to the air flow chamber 102; the second switch valve assembly 600 includes a second valve plate 610 which can move in the second movable valve chamber 1083, the second valve plate 610 is connected to the second positioning block 320 through the second rod body 620, and the second valve plate 610 is used to block the third channel 1081 at the second temperature. In addition, the second valve plate 610 can be provided with an air vent 611, so that the third channel 1081 and the fourth channel 1082 are connected at the first temperature. Through the above arrangement, the automatic opening and closing of the air valve can be realized in the limited space of the mold, and no additional control means are required, the stability is high, and the activity of the microbial capsule is effectively guaranteed. The exhaust channel 109 provided on the blow mold 100 can discharge the first airflow and the second airflow.

[0068] Embodiment 2:

[0069] like Figures 1 to 4 As shown, this embodiment also provides a blow molding device, including a mold base forming device 700, a blowing device 800, a translation device 900 and a thermoplastic polyurethane material blow molding cooling device as in the first embodiment, and the thermoplastic polyurethane material blow molding cooling device moves between the mold base forming device 700 and the blowing device 800 through the translation device 900. The mold base forming device 700, the blowing device 800, and the translation device 900 are all devices well known to those skilled in the art, and are not specifically expanded in this embodiment. For example, the mold base forming device 700 is a screw extrusion device, the blowing device 800 is a blowing device, and the translation device 900 is a cylinder.

[0070] In order to facilitate those skilled in the art to understand the principle of the blow molding equipment, the overall principle is explained;

[0071] The blank is formed in the blow mold 100 by the mold base forming device 700 (screw extruder), and the blow mold 100 is driven by the translation device 900 to move to the bottom of the blowing device 800, and the blank is blown by the blowing device 800 to obtain a preliminary thermoplastic polyurethane product. At this time, the permeation channel 104 is filled with the filling column 204. After the preliminary thermoplastic polyurethane product is obtained, the temperature of the blow molding cavity 101 is the first temperature. At this time, the first positioning block 310 and the second positioning block 320, under the action of the corresponding spring, push the metal deformation part 200 of the first curvature toward the cavity wall part 103;

[0072] In the process of the temperature dropping from the first temperature to the second temperature, since the third channel 1081 is connected with the fourth channel 1082, the second air flow is continuously provided by the second air source part, and takes away the heat of the mold through the second air inlet channel 108, the air flow cavity 102 and the exhaust channel 109, so as to accelerate the cooling efficiency and realize the rapid preliminary shaping of the thermoplastic polyurethane product.

[0073] When the temperature reaches the second temperature, the metal deformation part 200 is in the second curvature. At this time, the metal deformation part 200 is partially unfolded, and as the critical point of the magnetic attraction part 400, it is just magnetically attracted to the deformation end 203, and the magnetic force is greater than the elastic force of the spring, so that the two ends of the metal deformation part 200 overcome the elastic force under the action of the magnetic force and move away from the cavity wall part 103. On the one hand, when the metal deformation part 200 is away from the cavity wall part 103, the valve plate is driven to move by squeezing the positioning block and the connecting rod, so that the first air inlet channel 107 is connected and the second air inlet channel 108 is blocked, so as to maintain the matching of the airflow inlet amount and the airflow discharge amount. On the other hand, the first air source part can be connected with the airflow cavity 102, the penetration channel 104, the blow molding cavity 101, and the exhaust channel 109 in sequence, so that during the cooling process of the thermoplastic polyurethane material, the microbial capsule can be infiltrated into it in the form of heat penetration, thereby obtaining a thermoplastic polyurethane product of composite microbial capsules, and it can also take away the heat of the mold to accelerate the cooling efficiency.

[0074] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A thermoplastic polyurethane material blow molding cooling device, characterized in that: The invention comprises a blow mould (100) and a first air source part, wherein the blow mould (100) is provided with a columnar blow mould cavity (101) and an air flow cavity (102) arranged outside the blow mould cavity (101), and a cavity wall part (103) is arranged between the blow mould cavity (101) and the air flow cavity (102); the first air source part is connected to the air flow cavity (102) and is used for inputting a first air flow containing microorganism capsules; The cavity wall portion (103) is provided with a permeable channel (104) connecting the blow molding cavity (101) and the air flow cavity (102); the air flow cavity (102) is provided with a metal deformation portion (200) whose bending degree is positively correlated with temperature; At a first temperature, the metal deformation portion (200) is in contact with the cavity wall portion (103) at a first curvature; at a second temperature, the metal deformation portion (200) is spaced apart from the cavity wall portion (103) at a first spacing, so that the first air source portion can be connected to the airflow cavity (102), the permeation channel (104) and the blow molding cavity (101) in sequence; wherein the second temperature is lower than the inactivation temperature of the microbial capsule.

2. A thermoplastic polyurethane material blow molding cooling device according to claim 1, characterized in that: A first positioning block (310) and a second positioning block (320) are arranged at positions corresponding to the metal deformation portion (200) in the blow molding cavity (101), and the first positioning block (310) and the second positioning block (320) are both arranged on a side of the metal deformation portion (200) away from the cavity wall portion (103); At a first temperature, the first positioning block (310), the second positioning block (320) and the blow molding cavity (101) form a trapezoidal groove (301), and the metal deformation portion (200) is at least partially located between the trapezoidal groove (301) and the cavity wall portion (103); At a second temperature, the first positioning block (310) and the second positioning block (320) are squeezed and deformed or squeezed and displaced by the metal deformation portion (200) of the second curvature, so as to leave a gap of a second spacing between them and the cavity wall portion (103), and the second spacing is greater than the first spacing.

3. A thermoplastic polyurethane material blow molding cooling device according to claim 2, characterized in that: A first movable groove (105) is formed on the cavity wall of the airflow cavity (102) at a position corresponding to the first positioning block (310), and a second movable groove (106) is formed on the cavity wall of the airflow cavity (102) at a position corresponding to the second positioning block (320); the first positioning block (310) is slidably connected to the first movable groove (105) in a direction away from or close to the cavity wall portion (103), and the second positioning block (320) is slidably connected to the second movable groove (106) in a direction away from or close to the cavity wall portion (103); A first spring (330) is arranged in the first movable groove (105), one end of the first spring (330) abuts against the groove bottom wall of the first movable groove (105), and the other end of the first spring (330) abuts against the first positioning block (310); a second spring (340) is arranged in the second movable groove (106), one end of the second spring (340) abuts against the groove bottom wall of the second movable groove (106), and the other end of the second spring (340) abuts against the second positioning block (320).

4. A thermoplastic polyurethane material blow molding cooling device according to claim 3, characterized in that: The metal deformation part (200) comprises a deformation middle part (201) arranged corresponding to the groove bottom wall of the trapezoidal groove (301), the deformation middle part (201) is connected to a deformation transition part (202) corresponding to the groove side walls of the trapezoidal groove (301), and the end of the deformation transition part (202) is connected to a deformation end part (203); a magnetic attraction part (400) is arranged in the airflow cavity (102), and the magnetic attraction part (400) is used to magnetically attract the deformation end part (203) at a second temperature; At the first temperature, the deformed middle portion (201), the deformed transition portion (202) and the deformed end portion (203) are all in contact with the cavity wall portion (103), and the magnetic attraction portion (400) is separated from the deformed end portion (203); At the second temperature, the deformation middle portion (201), the deformation transition portion (202) and the deformation end portion (203) all have gaps with the cavity wall portion (103), and the gaps gradually increase; the potential energy of the first spring (330) and the second spring (340) increases, and the magnetic attraction portion (400) is magnetically connected to the deformation end portion (203).

5. A thermoplastic polyurethane material blow molding cooling device according to claim 3, characterized in that: The metal deformation portion (200) comprises a deformation middle portion (201) arranged corresponding to the groove bottom wall of the trapezoidal groove (301), the deformation middle portion (201) is connected to a deformation transition portion (202) corresponding to the groove side walls of the trapezoidal groove (301), and the end of the deformation transition portion (202) is connected to a deformation end portion (203); the deformation middle portion (201) is provided with an air guide groove on a surface facing the cavity wall portion (103); At the first temperature, the deformed middle portion (201), the deformed transition portion (202) and the deformed end portion (203) are all in contact with the cavity wall portion (103); and the air guide groove is closed by the cavity wall portion (103); At the second temperature, the end of the deformation middle portion (201), the deformation transition portion (202) and the deformation end portion (203) all have gaps with the cavity wall portion (103), and the gaps gradually increase; one end of the air guide groove is connected to the gap between one of the deformation transition portions (202) and the cavity wall portion (103), and the other end of the air guide groove is connected to the gap between another of the deformation transition portions (202) and the cavity wall portion (103).

6. A thermoplastic polyurethane material blow molding cooling device according to claim 3, characterized in that: The blow mould (100) is provided with a first air inlet channel (107), the first air inlet channel (107) connecting the first air source part and the air flow chamber (102); the blow mould (100) is also provided with a first switch valve assembly (500), the first switch valve assembly (500) is used to block the first air inlet channel (107) at a first temperature and connect the first air inlet channel (107) at a second temperature.

7. A thermoplastic polyurethane material blow molding cooling device according to claim 6, characterized in that: The first air inlet channel (107) comprises a first channel (1071) and a second channel (1072) which are arranged in a staggered manner, and a first movable valve chamber (1073) is connected between the first channel (1071) and the second channel (1072); the first channel (1071) is connected to the first air source part, and the second channel (1072) is connected to the air flow chamber (102); The first switch valve assembly (500) comprises a first valve plate (510) movable in the first movable valve chamber (1073); the first valve plate (510) is connected to the first positioning block (310) via a first rod (520); the first valve plate (510) is used to block the second channel (1072) at a first temperature.

8. A thermoplastic polyurethane material blow molding cooling device according to claim 3, characterized in that: The blow mould (100) is provided with a second air inlet channel (108), the second air inlet channel (108) is connected with a second air source part and the air flow chamber (102), and the second air source part is used to input a second air flow; the blow mould (100) is also provided with a second switch valve assembly (600), the second switch valve assembly (600) is used to block the second air inlet channel (108) at a second temperature, and connect the second air inlet channel (108) at a first temperature.

9. A thermoplastic polyurethane material blow molding cooling device according to claim 8, characterized in that: The second air inlet channel (108) comprises a third channel (1081) and a fourth channel (1082) which are arranged in a staggered manner, a second movable valve chamber (1083) is connected between the third channel (1081) and the fourth channel (1082), the third channel (1081) is connected to the second air source, and the fourth channel (1082) is connected to the air flow chamber (102); The second switch valve assembly (600) comprises a second valve plate (610) movable in the second movable valve chamber (1083); the second valve plate (610) is connected to the second positioning block (320) via a second rod body (620); the second valve plate (610) is used to block the third channel (1081) at a second temperature.

10. A blow molding device, characterized in that: The invention comprises a mold base forming device (700), a blowing device (800), a translation device (900), and a thermoplastic polyurethane material blow molding cooling device as described in any one of claims 1 to 9, wherein the thermoplastic polyurethane material blow molding cooling device is moved between the mold base forming device (700) and the blowing device (800) via the translation device (900).

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