Continuous production system and continuous production method of expandable thermoplastic material products

Abstract

The application provides a continuous production system and method of expandable thermoplastic material products, which comprises a filling device, a heating device, a cooling device, a demolding device, a conveying device and a plurality of molds, the molds are arranged on the conveying device and can move along the conveying direction of the conveying device to sequentially enter the filling device, the heating device, the cooling device and the demolding device; a plurality of bases are arranged on the conveying device, the bases are arranged one by one with the molds, the bases comprise first bases and second bases, the second bases are detachably arranged on the first bases, the second bases are provided with avoiding holes; the molds comprise upper molds and lower molds, the upper molds are arranged on the second bases and can move up and down with the second bases, the lower molds are arranged on the first bases and extend into the upper molds through the avoiding holes upwards, and the upper molds and the lower molds form forming cavities therebetween. The application has the advantages of high production efficiency and low energy consumption.

Description

TECHNICAL FIELD

[0001] The present application relates to the molding technical field, and in particular to a continuous production system and a continuous production method of expandable thermoplastic material products. BACKGROUND

[0002] The expandable thermoplastic material includes but is not limited to expandable polystyrene (EPS), expandable polypropylene (EPP), expandable polyolefin (EPO), expandable thermoplastic polyurethane (ETPU) and all other materials that can be physically foamed and molded by heating.

[0003] At present, the molding production of such products usually adopts a single "molding machine" operation mode. In this mode, the mold is fixedly installed on the molding machine, and the position remains unchanged during the entire processing process. The molding machine sequentially performs the processes of clamping, filling, steam heating, cooling, unclamping and demolding, until the entire production cycle is completed and the product is ejected. This production method has the problems of long production cycle and low efficiency, and due to the repeated switching of the same molding machine between heating and cooling states, the energy consumption is large, causing serious energy waste. SUMMARY

[0004] The first object of the present application is to provide a continuous production system of expandable thermoplastic material products with high production efficiency and low energy consumption.

[0005] The second object of the present application is to provide a continuous production method.

[0006] In order to achieve the above-mentioned first object, the present application provides a continuous production system of expandable thermoplastic material products, which comprises a filling device, a heating device, a cooling device, a demolding device, a conveying device and a plurality of molds. The molds are arranged on the conveying device and can move along the conveying direction of the conveying device to sequentially enter the filling device, the heating device, the cooling device and the demolding device. The conveying device is provided with a plurality of bases, and the bases are arranged one by one corresponding to the molds. The base comprises a first base and a second base, the second base is detachably arranged on the first base, and the second base is provided with a avoiding hole. The mold comprises an upper mold and a lower mold. The upper mold is arranged on the second base and can move up and down with the second base. The lower mold is arranged on the first base and extends into the upper mold through the avoiding hole upward. The upper mold and the lower mold form a molding cavity therebetween.

[0007] As can be seen from the above scheme, the mold is arranged on the base and sequentially enters the filling device, the heating device, the cooling device and the demolding device and circulates by the conveying cooperation of the conveying device, so that continuous circulation production is realized, thereby significantly improving the production efficiency; since the heating device and the cooling device are independently arranged, the heating device only needs to perform heating operation and the cooling device only needs to perform cooling operation, thereby avoiding the energy loss caused by the repeated alternation of the cold and hot processes in the same forming machine in the prior art, which is beneficial to greatly improving the energy utilization efficiency and reducing the repeated consumption of heat, thereby significantly saving energy, reducing carbon footprint and effectively avoiding energy waste. In addition, by adopting the combined structure of the first base and the second base, the mold is always kept in the closed mold state when being in the filling device, the heating device and the cooling device, and the mold is facilitated to perform the opening mold action when being in the demolding device, thereby improving the stability and flexibility of the production process.

[0008] Further, the conveying route of the conveying device is in a closed loop type or a linear loop type.

[0009] As can be seen from the above scheme, it is beneficial to automatically circulate and flow the mold between the filling device, the heating device, the cooling device and the demolding device.

[0010] Further, the closed loop type is in a rectangular loop type, and the conveying device comprises four conveying frames and four transplanters, the four conveying frames are sequentially connected end to end, and the transplanters are arranged at the connection positions of the adjacent two conveying frames and are used to transfer the mold on the previous conveying frame to the next conveying frame; or, the closed loop type is in a circular loop type, and the conveying device comprises a rotating disc capable of rotating around its own axis, and a plurality of molds are arranged on the rotating disc and rotate with the rotating disc.

[0011] Further, when the conveying route of the conveying device is in a linear loop type, the conveying device comprises two conveying frames and two elevators, the two conveying frames are arranged in an up-down manner, and the two elevators are arranged at the two ends of the conveying frames and move up and down between the two conveying frames.

[0012] Further, the upper mold is provided with a plurality of first air holes, the first air holes penetrate the outer peripheral wall of the upper mold and are in communication with the forming cavity; and / or, the lower mold is provided with a plurality of second air holes, the second air holes penetrate the inner peripheral wall of the lower mold and are in communication with the forming cavity.

[0013] As can be seen from the above scheme, by arranging the first air holes and the second air holes, heat can be more rapidly transferred to the forming cavity in the mold and the product during the heating and cooling process, which not only helps to improve the heating and cooling efficiency, but also is beneficial to reducing energy consumption.

[0014] Further, the filling device is provided with a filling frame moving up and down and a filling support seat moving up and down, the mold and the base are arranged between the filling frame and the filling support seat, the filling frame is provided with a filling gun, the filling gun is detachably connected with the filling nozzle assembly of the mold, and the filling gun can open or close the filling nozzle assembly.

[0015] According to the above scheme, the filling support seat can lift the base and the mold thereon to temporarily separate from the conveying surface of the conveying device; at the same time, the filling gun can automatically complete the connection and separation with the filling nozzle assembly of the mold, so as to realize the quick separation of the mold and the filling gun after filling and smoothly transfer to the next process.

[0016] Further, the heating device and the cooling device are provided with a cover moving up and down and a support seat moving up and down, the mold and the base are arranged between the cover and the support seat, the cover and the support seat are sealingly connected with the base to form a sealed cavity; the heating device injects steam into the sealed cavity to heat the mold and the forming cavity in the mold; the cooling device sprays cooling water and performs vacuumizing in the sealed cavity to cool the mold and the product in the mold.

[0017] According to the above scheme, by arranging the mold in the sealed cavity, the mold can be uniformly heated and cooled in all directions; during the cooling stage, the cooling water is sprayed into the sealed cavity and then vacuumized, which not only effectively cools the mold, but also timely removes the steam generated during the cooling process; at the same time, in the vacuum environment, the boiling point of the cooling water is reduced, which helps to speed up the heat exchange process of the residual cooling water, improve the cooling efficiency, and reduce the residual cooling water on the surface of the mold.

[0018] Further, the demolding device is provided with a demolding frame moving up and down and a demolding support seat moving up and down, the mold and the base are arranged between the demolding frame and the demolding support seat, the demolding frame can drive the second base and the upper mold thereon to move, the demolding frame is provided with an ejection plate moving up and down, the upper mold is provided with an ejection assembly, and the ejection plate forces the ejection assembly to perform an ejection action.

[0019] According to the above scheme, the demolding support seat can lift the base upward to temporarily separate from the conveying surface of the conveying device, so as to perform the mold opening and demolding operation; first, the demolding frame drives the second base and the upper mold to move upward to separate the upper mold and the lower mold; then, the ejection plate moves downward to push the ejection assembly to eject the product from the upper mold, and finally the product demolding is completed.

[0020] Further, the demolding device is further provided with a product receiving assembly, the product receiving assembly comprises a product receiving disc moving forward and backward, and the product receiving disc is arranged between the demolding frame and the base.

[0021] From the above scheme, after the mold is opened, the product receiving tray is moved directly below the demolding frame for receiving the product falling from the upper mold.

[0022] To achieve the above-mentioned second purpose, the present application provides a continuous production method, which comprises a filling device, a heating device, a cooling device, a demolding device, a conveying device, a plurality of bases and a plurality of molds. The bases are arranged on the conveying device, and the molds are arranged on the corresponding bases and can move along the conveying direction of the conveying device to sequentially enter the filling device, the heating device, the cooling device and the demolding device. The continuous production method comprises the following steps:

[0023] The filling step: the conveying device conveys the mold to the filling device, the filling support seat of the filling device lifts the base and the mold, the filling gun of the filling device is connected with the filling nozzle assembly of the mold, the filling gun opens the filling nozzle assembly and fills the material into the mold;

[0024] The heating and fusion step: the conveying device conveys the mold to the heating device, the support seat of the heating device lifts the base and the mold, the cover body and the support seat of the heating device are sealingly connected with the base to form a heating sealed cavity, steam is injected into the heating sealed cavity to heat the mold and the material in the mold until the material is fused and formed;

[0025] The cooling step: the conveying device conveys the mold to the cooling device, the support seat of the cooling device lifts the base and the mold, the cover body and the support seat of the cooling device are sealingly connected with the base to form a cooling sealed cavity, cooling water is sprayed into the cooling sealed cavity first, and then vacuumizing operation is performed to cool the mold in the cooling sealed cavity;

[0026] The demolding step: the conveying device conveys the mold to the demolding device, the demolding support seat of the demolding device lifts the base and the mold, the mold comprises an upper mold and a lower mold, the demolding frame of the demolding device moves downward and drives the upper mold and the lower mold to separate, the ejecting plate of the demolding device forces the ejecting assembly on the upper mold to eject the product downward, so that the product is separated from the upper mold, and after demolding, the demolding frame drives the upper mold to move downward and the lower mold to close. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a structural diagram of the first perspective of the continuous production system embodiment of the present application.

[0028] Figure 2 is a structural diagram of the second perspective of the continuous production system embodiment of the present application.

[0029] Figure 3 is a structural diagram of the first conveying device in the continuous production system embodiment of the present application.

[0030] Figure 4 is a structural diagram of the transplanting machine in the continuous production system embodiment of the present application.

[0031] Figure 5 is the first perspective exploded view of the buffer blocking assembly in the continuous production system embodiment of the present application.

[0032] Figure 6 is the second perspective exploded view of the buffer blocking assembly in the continuous production system embodiment of the present application.

[0033] Figure 7 is the schematic view of the second conveying device in the continuous production system embodiment of the present application.

[0034] Figure 8 is the structural view of the base and the mold in the continuous production system embodiment of the present application.

[0035] Figure 9 is the exploded view of the base and the mold in the continuous production system embodiment of the present application.

[0036] Figure 10 is the sectional view of the base and the mold in the continuous production system embodiment of the present application.

[0037] Figure 11 is the enlarged view of A in the continuous production system embodiment of the present application. Figure 10

[0038] Figure 12 is the exploded view of the first locking assembly in the continuous production system embodiment of the present application.

[0039] Figure 13 is the exploded view of the second locking assembly in the continuous production system embodiment of the present application.

[0040] Figure 14 is the structural view of the filler holder and the filler gun in the continuous production system embodiment of the present application.

[0041] Figure 15 is the exploded view of the cover, the base and the support seat in the heating device in the continuous production system embodiment of the present application.

[0042] Figure 16 is the exploded view of the cooling cover, the base and the support seat in the cooling device in the continuous production system embodiment of the present application.

[0043] Figure 17 is the structural view of the demolding holder and the base in the continuous production system embodiment of the present application.

[0044] Legend of reference signs:

[0045] 1 - filler device, 11 - filler holder, 12 - filler gun

[0046] ​2 - heating device, 21 - heating cover, 22 - heating support seat, 23 - locking module, 231 - insertion hole, 24 - locking assembly, 241 - bolt, 242 - locking drive device;

[0047] 3 - cooling device, 31 - cooling cover, 32 - cooling support seat, 33 - locking module, 331 - insertion hole, 34 - locking assembly, 341 - bolt, 342 - locking drive device;

[0048] 4 - demolding device, 41 - demolding frame, 42 - product receiving assembly, 421 - product receiving tray;

[0049] 5 - conveying device, 51 - longitudinal conveying frame, 52 - transverse conveying frame, 53 - transplanting machine, 531 - middle water receiving tray, 532 - side water receiving tray, 533 - transplanting conveying part;

[0050] 6 - mold, 61 - upper mold, 611 - product ejection assembly, 62 - lower mold, 63 - filler nozzle assembly;

[0051] 7 - base, 71 - first base, 711 - lower mold supporting part, 712 - communication hole, 72 - second base, 721 - avoiding hole, 722 - upper mold supporting part;

[0052] 8 - buffer blocking assembly, 81 - mounting frame, 82 - guide seat, 83 - first movable seat, 84 - second movable seat, 841 - abutting part, 842 - rolling part, 85 - up-down drive device, 86 - protective cover, 87 - buffer;

[0053] 9 - rotating disc;

[0054] 10a / 10b - first locking assembly, 101 - fixed seat, 1011 - locking groove, 1012 - unlocking groove, 1013 - sliding groove, 102a / 102b - locking part, 103 - elastic part, 104 - sliding block, 1041 - groove, 1042 - first protruding part, 1043 - second protruding part;

[0055] 20a / 20b - first unlocking assembly, 201 - unlocking block, 202 - air cylinder;

[0056] 30 - second locking assembly;

[0057] 40 - second unlocking assembly;

[0058] 50 - third locking assembly;

[0059] 60 - third unlocking assembly.

[0060] The application will be further described in conjunction with the drawings and embodiments. DETAILED DESCRIPTION

[0061] Continuous production system embodiment:

[0062] With reference to Figure 1 and Figure 2 , the embodiment provides a continuous production system of expandable thermoplastic material products, which comprises a filling device 1, a heating device 2, a cooling device 3, a demolding device 4, a conveying device 5 and a plurality of molds 6. The conveying device 5 is provided with a plurality of bases 7, and the bases 7 are arranged one by one with the molds 6. The molds 6 are arranged on the bases 7 and can move along the conveying direction of the conveying device 5 to enter the filling device 1, the heating device 2, the cooling device 3 and the demolding device 4 in turn and be conveyed in a cycle to realize the continuous production of the expandable thermoplastic material products.

[0063] The expandable thermoplastic material products include but are not limited to expandable polystyrene (EPS), expandable polypropylene (EPP), expandable polyolefin (EPO), expandable thermoplastic polyurethane (ETPU) and all materials that can be physically foamed and formed by heating.

[0064] The conveying route of the conveying device 5 is in a closed loop type or a linear loop type.

[0065] With reference to Figure 3 and Figure 4 , and in combination with Figure 1 and Figure 2 , the closed loop type of the embodiment is in a rectangular loop type, and the conveying device 5 comprises four conveying frames and four transplanters 53. The four conveying frames are connected in sequence and arranged in parallel into a rectangle; the transplanters 53 are arranged at the connection between adjacent two conveying frames to transfer the bases 7 and the molds 6 thereon on the previous conveying frame to the next conveying frame.

[0066] Specifically, the four-section conveying frame includes two longitudinal conveying frames 51 and two end transverse conveying frames 52. One longitudinal conveying frame 51 passes through the filling device 1 and the demolding device 4, so that the mold 6 after demolding can be directly conveyed into the filling device 1 without transfer conveying of the transplanting machine 53; the other longitudinal conveying frame 51 passes through the heating device 2 and the cooling device 3, so that the mold 6 after heating can be directly conveyed into the cooling device 3 without transfer conveying of the transplanting machine 53. The conveying surface of the longitudinal conveying frame 51 is not in the same plane as the conveying surface of the transverse conveying frame 52, and the conveying surface of the longitudinal conveying frame 51 is preferably slightly higher than the conveying surface of the transverse conveying frame 52. The transplanting machine 53 is arranged at the lower side of the end of the transverse conveying frame 52. The transplanting machine 53 is provided with two liftable transplanting conveying parts 533, the conveying direction of the transplanting conveying part 533 is parallel to the conveying direction of the longitudinal conveying frame 51, and is used to receive the base 7 and the mold 6 thereon conveyed from the longitudinal conveying frame 51. When the base 7 and the mold 6 thereon completely enter the transplanting conveying part 533, the transplanting conveying part 533 is lowered, so that the base 7 and the mold 6 thereon fall on the conveying surface of the transverse conveying frame 52 and move along the conveying direction thereof.

[0067] The longitudinal conveying frame 51, the transverse conveying frame 52 and the transplanting conveying part 533 are all provided with a plurality of conveying rollers which can push the base 7 to move, so that the base 7 only needs to be placed on the conveying rollers to move backward.

[0068] A plurality of water receiving trays are arranged between the two transplanting conveying parts 533 of the transplanting machine 53, and one middle water receiving tray 531 and two side water receiving trays 532 are taken as examples. The middle water receiving tray 531 is arranged below the middle of the two transplanting conveying parts 533, and the two water receiving trays are respectively arranged above the two sides of the middle water receiving tray 531 and are inclined to the middle water receiving tray 531, so that water automatically flows into the middle water receiving tray 531 under the action of gravity.

[0069] The arrangement of the water receiving tray can be arranged according to the actual needs of the product forming process, for example, the water receiving tray can be arranged on the two transplanting machines 53 between the cooling process and the demolding process to receive the residual cooling water.

[0070] Referring to Figure 5 and Figure 6 , and combining Figure 3 , the longitudinal conveying frame 51 is provided with a buffer blocking assembly 8 corresponding to the filling device 1, the heating device 2, the cooling device 3 and the demolding device 4, so as to limit the base 7 to move and temporarily stay at the filling position, the heating position, the cooling position and the demolding position.

[0071] The buffer blocking assembly 8 comprises a mounting frame 81, a guide seat 82, a first movable seat 83, a second movable seat 84, an up-down driving device 85, a protective cover 86a / 86b and two buffers 87. The guide seat 82 and the up-down driving device 85 are arranged on the mounting frame 81, the first movable seat 83 is movably inserted into the guide seat 82, and the second movable seat 84 is movably inserted into the upper part of the first movable seat 83. The protective cover 86a / 86b is arranged above the second movable seat 84 and has a protective effect. The protective cover 86a and the protective cover 86b can be arranged at will, or both can be arranged at the same time. The first end of the second movable seat 84 is slidably connected with the first movable seat 83, and the second end of the second movable seat 84 is provided with an abutting portion 841 and a plurality of rolling members 842. The abutting portion 841 and the rolling members 842 are arranged on the front and rear sides of the first end of the second movable seat 84, respectively. The abutting portion 841 is arranged correspondingly to the buffer 87, and the rolling members 842 partially protrude from the end wall of the end of the second movable seat 84 and are used to abut against the base 7. Further, the rolling members 842 can rotate around their own axes and can play a force relieving role. The rolling members 842 are preferably rollers or bearings.

[0072] Referring to Figure 7 In another embodiment, the closed circulation type is a circular circulation type, the conveying device 5 comprises a rotating disc 9 capable of rotating around its own axis, the filling device 1, the heating device 2, the cooling device 3 and the demolding device 4 are sequentially arranged around the rotating disc 9, and the base 7 and the mold 6 thereon are arranged on the rotating disc 9 and follow the rotation.

[0073] In yet another embodiment, the conveying route of the conveying device (not shown in the figure) is a linear circulation type, the conveying device comprises two conveying frames arranged in a vertical manner and two elevators arranged at the two ends of the conveying frames, respectively. The elevators move up and down between the two conveying frames to realize the circulation of the base and the mold between the two conveying frames.

[0074] Referring to Figure 8 to Figure 11 The base 7 comprises a first base 71 and a second base 72, and the second base 72 is detachably arranged on the first base 71. Four avoiding holes 721 are arranged on the second base 72, the number of the mold 6 is equal to the number of the avoiding holes 721, and the avoiding holes 721 are arranged correspondingly to the mold 6. The second base 72 is provided with an upper mold supporting portion 722 around each of the avoiding holes 721, and the first base 71 is provided with a lower mold supporting portion 711 below each of the avoiding holes 721. The first base 71 is provided with four communication holes 712, and the communication holes 712 are arranged correspondingly to the avoiding holes 721. The communication holes 712 facilitate the steam in the subsequent heating process to pass through and enter the lower mold 62, and also facilitate the cooling water in the subsequent cooling process to pass through and enter the lower mold 62.

[0075] The mold 6 comprises an upper mold 61 and a lower mold 62, the upper mold 61 is arranged on the upper mold supporting portion 722 and can move up and down following the second base 72, the lower mold 62 is arranged on the lower mold supporting portion 711 and extends into the upper mold 61 through the corresponding avoiding hole 721 upward, and a forming cavity is formed between the upper mold 61 and the lower mold 62. In the embodiment, the upper mold 61 is a female mold, and the lower mold 62 is a male mold. When the mold is opened, the product is separated from the lower mold 62 and moves upward following the upper mold 61, that is, the product is located in the upper mold 61.

[0076] The upper mold 61 is provided with a plurality of first air holes (not shown in the figure), the plurality of first air holes are uniformly distributed on the outer peripheral wall of the upper mold 61, the first air holes penetrate the outer peripheral wall of the upper mold 61 and communicate with the forming cavity. The lower mold 62 is provided with a plurality of second air holes (not shown in the figure), the lower mold 62 is a hollow structure, the plurality of second air holes are uniformly distributed on the inner peripheral wall of the lower mold 62, the second air holes penetrate the inner peripheral wall of the lower mold 62 and communicate with the forming cavity. The diameters of the first air holes and the second air holes are small, the material filled into the forming cavity cannot enter the first air holes and the second air holes, which does not affect the shape and structure of the product, and facilitates the rapid heat transfer in the heating process and the cooling process, significantly improves the heating and cooling efficiency, and reduces energy consumption.

[0077] Referring to Figure 12 and Figure 13 , and combining Figure 8 , in order to ensure that the first base 71 and the second base 72 will not be accidentally separated in the filling process, the heating process and the cooling process, a plurality of first locking assemblies 10a / 10b are connected between the first base 71 and the second base 72 of the embodiment, and the plurality of first locking assemblies 10a / 10b are arranged around the first base 71 and the second base 72 respectively.

[0078] The first locking assembly 10a / 10b comprises a fixing seat 101, a locking piece 102a / 102b, an elastic piece 103 and a sliding block 104. One of the fixing seat 101 and the locking piece 102a / 102b is arranged on the first base 71, and the other is arranged on the second base 72. The fixing seat 101 is provided with a locking groove 1011, an unlocking groove 1012 and a sliding groove 1013, and the sliding groove 1013 is in communication with the locking groove 1011 and the unlocking groove 1012, respectively. The sliding block 104 is slidingly arranged in the sliding groove 1013, and the sliding block 104 is provided with a recess 1041, a first protrusion 1042 and a second protrusion 1043, and the recess 1041 is arranged between the first protrusion 1042 and the second protrusion 1043. The locking piece 102a / 102b is detachably arranged in the locking groove 1011 and the recess 1041, and the locking piece 102a / 102b can be clamped with the first protrusion 1042 to limit the separation of the locking piece 102a / 102b and the fixing seat 101, that is, to limit the separation of the first base 71 and the second base 72. The elastic piece 103 is elastically abutted between the end of the sliding block 104 and the groove wall of the sliding groove 1013, so that the sliding block 104 can slide in the sliding groove 1013.

[0079] Referring to Figure 14 , in combination with Figure 1 and Figure 8 , the filling device 1 is provided with a filling rack 11 moving up and down and a filling support seat (not shown in the figure) moving up and down, and the mold 6 and the base 7 are arranged between the filling rack 11 and the filling support seat. The filling support seat can lift the base 7 and the mold 6 thereon upward, so that the base 7 temporarily separates from the conveying surface of the conveying device 5, facilitating the filling operation. The filling rack 11 is provided with a plurality of filling guns 12, the filling guns 12 are detachably connected with the filling nozzle assembly 63 of the mold 6, the filling guns 12 can open or close the filling nozzle assembly 63, and the filling operation to the mold 6 is realized.

[0080] In order to avoid the separation of the filling rack 11 and the base 7 during the filling process, a plurality of second locking assemblies 30 are arranged between the filling rack 11 and the base 7, and the plurality of second locking assemblies 30 are arranged on the respective opposite sides of the second base 72 and the filling rack 11. The structure of the second locking assembly 30 is similar to that of the first locking assembly 10b, and the difference lies in that one of the fixing seat and the locking piece of the second locking assembly 30 is arranged on the second base 72, and the other is arranged on the filling rack 11. In the embodiment, the fixing seat is arranged on the second base 72, and the locking piece is arranged on the filling rack 11.

[0081] The filler frame 11 is provided with a plurality of second unlocking assemblies 40, which are arranged in correspondence with the second locking assemblies 30 in an up-down manner, and the second unlocking assemblies 40 can force the second locking assemblies 30 to be unlocked. The second unlocking assembly 40 comprises a cylinder and an unlocking block connected to the driving end of the cylinder. The cylinder is connected to the side wall of the filler frame 11, and the unlocking block is driven by the cylinder to move downward and be inserted into the unlocking groove of the second locking assembly 30, so that the second locking assembly 30 is unlocked.

[0082] Referring to Figure 15 , in combination with Figure 1 and Figure 2 , the heating device 2 is provided with a heating cover 21 moving up and down and a heating support seat 22 moving up and down, and the mold 6 and the base 7 are arranged between the heating cover 21 and the heating support seat 22. The heating support seat 22 can lift the base 7 and the mold 6 thereon upward, so that the base 7 is temporarily separated from the conveying surface of the conveying device 5, facilitating separate heating operations.

[0083] The heating cover 21 and the heating support seat 22 are sealingly connected to the upper and lower sides of the base 7 to form an upper heating sealed cavity and a lower heating sealed cavity. The heating device 2 injects steam into the upper heating sealed cavity and the lower heating sealed cavity, respectively, and uniformly heats the mold 6 and the molding cavity in the mold 6 from the upper and lower sides.

[0084] The opposite sides of the heating cover 21 are provided with two mold locking members 23, and the two sides of the heating support seat 22 are provided with two mold locking assemblies 24, which are one-to-one corresponding and detachably connected.

[0085] Specifically, the mold locking members 23 protrude downward from the bottom wall of the heating cover 21, and the lower part of the mold locking members 23 is further provided with an insertion hole 231. The mold locking assembly 24 comprises a latch member 241 and a mold locking driving device 242, and the mold locking driving device 242 drives the latch member 241 to be inserted into the insertion hole 231, so as to realize the fixed connection between the heating cover 21 and the heating support seat 22.

[0086] Referring to Figure 16 , in combination with Figure 1 and Figure 2 , the cooling device 3 is provided with a cooling cover 31 moving up and down and a cooling support seat 32 moving up and down, and the mold 6 and the base 7 are arranged between the cooling cover 31 and the corresponding cooling support seat 32.

[0087] The cooling support base 32 can lift the base 7 and the mold 6 thereon upwardly, so that the base 7 is temporarily separated from the conveying surface of the conveying device 5, facilitating the cooling operation. The cooling cover 31 and the cooling support base 32 are sealingly connected to the upper and lower sides of the base 7, forming an upper cooling sealing cavity and a lower cooling sealing cavity. The cooling device 3 sprays cooling water into the upper cooling sealing cavity and the lower cooling sealing cavity, and then performs vacuumization, so that a negative pressure environment is formed in the upper cooling sealing cavity and the lower cooling sealing cavity, which is conducive to rapidly cooling the mold 6 and the product in the mold 6.

[0088] Two mold locking members 33 are arranged on opposite sides of the cooling cover 31, and two mold locking assemblies 34 are arranged on the two sides of the cooling support base 32, the mold locking members 33 and the mold locking assemblies 34 are one-to-one corresponding and detachably connected. Specifically, the mold locking members 33 protrude downwardly from the bottom wall of the cooling cover 31, and the lower part of the mold locking members 33 is provided with a plug hole 331. The mold locking assembly 34 comprises a plug pin 341 and a mold locking driving device 342, the mold locking driving device 342 drives the plug pin 341 to be inserted into the plug hole 331, so as to realize the fixed connection of the cooling cover 31 and the cooling support base 32.

[0089] Referring to Figure 17 , in combination with Figure 1 , Figure 12 and Figure 13 , the demolding device 4 is provided with a demolding frame 41 moving upwardly and downwardly and a demolding support base (not shown in the figure), and the mold 6 and the base 7 are arranged between the demolding frame 41 and the demolding support base. The demolding support base can lift the base 7 and the mold 6 thereon upwardly, so that the base 7 is temporarily separated from the conveying surface of the conveying device 5, facilitating the demolding operation.

[0090] In order to ensure that the first base 71 can be separated from the second base 72 during the demolding process, the demolding frame 41 of the embodiment is provided with a plurality of first unlocking assemblies 20a / 20b, which are arranged one-to-one corresponding to the first locking assemblies 10a / 10b. The first unlocking assemblies 20a / 20b can force the first locking assemblies 10a / 10b to be unlocked.

[0091] Specifically, the first unlocking assembly 20a / 20b can be inserted into the unlocking groove 1012, so as to abut against the second protruding part 1043 and push the first protruding part 1042 to move away from the locking groove 1011, so that the locking member 102b is separated from the first protruding part 1042, realizing the unlocking.

[0092] The first unlocking assembly 20a can be an unlocking block directly connected to the demolding frame 41, which is automatically inserted into the unlocking groove 1012 by the downward movement of the demolding frame 41, as shown in Figure 12The first unlocking assembly 20b includes a cylinder 202 and an unlocking block 201 connected to the driving end of the cylinder 202. The cylinder 202 is connected to the side wall of the stripper frame 41. The unlocking block 201 is driven by the cylinder 202 to move downward and be inserted into the unlocking groove 1012, as shown in Figure 13

[0093] To ensure that the stripper frame 41 can drive the second base 72 to move up and down, the second base 72 is connected with the stripper frame 41 through a plurality of third locking assemblies 50. The third locking assemblies 50 are arranged on the opposite sides of the second base 72 and the stripper frame 41.

[0094] The third locking assembly 50 is similar to the second locking assembly 30 in structure, but one of the fixing seat and the locking piece of the third locking assembly 50 is arranged on the second base 72, and the other is arranged on the stripper frame 41. In the embodiment, the fixing seat is arranged on the second base 72, and the locking piece is arranged on the stripper frame 41, so that the second locking assembly 30 and the third locking assembly 50 can share the same fixing seat, the same elastic piece and the same sliding block, thereby saving the number of parts.

[0095] The stripper frame 41 is further provided with a plurality of third unlocking assemblies 60. The third unlocking assemblies 60 are arranged in correspondence with the third locking assemblies 50. The third unlocking assemblies 60 can force the third locking assemblies 50 to be unlocked. The third unlocking assemblies 60 are the same as the first unlocking assembly 20b in structure, and will not be described here.

[0096] The stripper frame 41 is provided with an ejection plate and an ejection plate driving assembly. The ejection plate is arranged in the stripper frame 41. The ejection plate driving assembly is arranged on the top wall of the stripper frame 41. The ejection plate driving assembly can drive the ejection plate to move up and down.

[0097] Referring to Figure 8 The top wall of the upper die 61 is provided with a plurality of product ejection assemblies 611. The product ejection assemblies 611 are arranged below the ejection plate. After the mold is opened, the ejection plate moves downward and pushes the product ejection assemblies 611 to eject the product downward, so that the product is separated from the upper die 61, thereby achieving demolding.

[0098] Referring to Figure 1 and Figure 2 The demolding device 4 is further provided with a product receiving assembly 42 for receiving the product. The product receiving assembly 42 includes a product receiving disc 421 that moves forward and backward. The product receiving disc 421 is arranged between the stripper frame 41 and the second base 72, and is used to move to the position directly below the second base 72 to receive the product after the product is demolded from the upper die 61. The forward and backward directions of the embodiment are the feeding and discharging directions of the demolding device 4.

[0099] Continuous production method embodiment: ​

[0100] Referring to Figure 1 to Figure 17 The embodiment provides a continuous production method of the continuous production system.

[0101] The filling step is as follows: the conveying device 5 conveys the mold 6 to the filling device 1, the filling support seat of the filling device 1 is lifted to lift the base 7 and the mold 6 thereon, so that the base 7 is temporarily separated from the conveying surface of the conveying device 5; the filling frame 11 of the filling device 1 drives the filling gun 12 thereon to move downward, so that the filling gun 12 is automatically connected with the filling nozzle assembly 63 of the mold 6; the filling gun 12 opens the filling nozzle assembly 63 and fills the material into the forming cavity of the mold 6; after the filling is completed, the filling gun 12 closes the filling nozzle assembly 63 and moves upward, and the filling support seat moves downward and puts the base 7 and the mold 6 thereon back on the conveying surface of the conveying device 5.

[0102] The heating and fusing step is as follows: the conveying device 5 conveys the mold 6 after the filling to the heating device 2, the heating support seat 22 of the heating device 2 is lifted to lift the base 7 and is sealingly connected with the bottom of the base 7, so as to form an upper heating sealing cavity, and at this time, the base 7 is temporarily separated from the conveying surface of the conveying device 5; the heating cover 21 of the heating device 2 moves downward and is sealingly connected with the upper part of the base 7, so as to form a lower heating sealing cavity; steam is injected into the upper heating sealing cavity and the lower heating sealing cavity respectively, so as to heat the mold 6 and the material in the mold 6, so that the material in the forming cavity is foamed and fused.

[0103] The cooling step is as follows: the conveying device 5 conveys the mold 6 after the heating to the cooling device 3, the cooling support seat 32 of the cooling device 3 is lifted to lift the base 7 and is sealingly connected with the bottom of the base 7, so as to form an upper cooling sealing cavity, and at this time, the base 7 is temporarily separated from the conveying surface of the conveying device 5; the cooling cover 31 of the cooling device 3 moves downward and is sealingly connected with the upper part of the base 7, so as to form a lower cooling sealing cavity; cooling water is sprayed into the upper cooling sealing cavity and the lower cooling sealing cavity respectively and lasts for a preset time, the water temperature of the cooling water is between 25℃ and 55℃, and the preset time is preferably 3 seconds to 30 seconds; the cooling water is preheated to boil and evaporate, and a large amount of water vapor is generated during the process, and the water vapor carries a large amount of heat during the process of discharging the cooling sealing cavity, so as to realize the cooling function.

[0104] Then, the upper cooling sealing cavity and the lower cooling sealing cavity are respectively vacuumized, so that the internal environment of the upper cooling sealing cavity and the lower cooling sealing cavity is in a negative pressure state, the negative pressure environment can reduce the boiling point of the cooling water, so that the residual cooling water is rapidly boiled and evaporated, on one hand, a large amount of heat can be taken away and the mold 6 is cooled, on the other hand, the residual cooling water on the surface of the mold 6 can be reduced or even avoided, so as to keep the dryness of the mold 6.

[0105] The demolding step: the conveying device 5 conveys the cooled mold 6 to the demolding device 4, the demolding support seat of the demolding device 4 is lifted to lift the base 7 and the mold 6 thereon, so that the base 7 is temporarily separated from the conveying surface of the conveying device 5; the demolding frame 41 of the demolding device 4 is lowered and fixedly connected with the second base 72; then the demolding frame 41 drives the second base 72 and the upper mold 61 thereon to rise, so that the upper mold 61 is separated from the lower mold 62, and the mold is opened, at this time, the product is located in the upper mold 61; then the ejection plate of the demolding device 4 is lowered to force the ejection assembly on the upper mold 61 to eject the product downward, so that the product is separated from the upper mold 61; at the same time, the product receiving tray 421 moves to the lower side of the second base 72 and is used for receiving the product. After demolding, the demolding frame 41 drives the upper mold 61 to move downward and fold with the lower mold 62, the demolding support seat is lowered, and the base 7 and the mold 6 thereon are placed on the conveying surface of the conveying device 5 again, so as to facilitate conveying the base 7 and the mold 6 thereon to the filling device 1 to perform the cycle operation.

[0106] As can be seen from the above, the mold 6 is arranged on the base 7, and is sequentially introduced into the filling device 1, the heating device 2, the cooling device 3 and the demolding device 4 by the cooperation of the conveying device 5, and circulates to realize continuous and circulating production, thereby significantly improving the production efficiency; since the heating device 2 and the cooling device 3 are independently arranged, the heating device 2 only needs to perform heating operation, and the cooling device 3 only needs to perform cooling operation, thereby avoiding the capacity loss caused by repeated and alternating cold and hot processes in the prior art, and facilitating to greatly improve the energy utilization efficiency and reduce the repeated consumption of heat, thereby significantly saving energy, reducing carbon footprint and effectively avoiding energy waste. In addition, by adopting the combined structure of the first base 71 and the second base 72, it is ensured that the mold 6 always maintains the mold closing state in the filling device 1, the heating device 2 and the cooling device 3, and the mold 6 can be easily opened in the demolding device 4, thereby improving the stability and flexibility of the production process.

[0107] Finally, it should be emphasized that the above is only a preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A continuous production system of expandable thermoplastic material products, characterized in that: it comprises a filling device, a heating device, a cooling device, a demolding device, a conveying device and a plurality of molds, the molds are arranged on the conveying device and can move along the conveying direction of the conveying device to enter the filling device, the heating device, the cooling device and the demolding device in sequence; a plurality of bases are arranged on the conveying device, the bases are arranged one-to-one with the molds, the bases comprise first bases and second bases, the second bases are detachably arranged on the first bases, the second bases are provided with avoiding holes; the molds comprise upper molds and lower molds, the upper molds are arranged on the second bases and can move up and down with the second bases, the lower molds are arranged on the first bases and extend into the upper molds through the avoiding holes, the upper molds and the lower molds form forming cavities therebetween; the filling device is provided with a filling frame moving up and down and a filling support seat moving up and down, the molds and the bases are arranged between the filling frame and the filling support seat, the filling frame is provided with a filling gun, the filling gun is detachably connected with a filling nozzle assembly of the mold, the filling gun can open or close the filling nozzle assembly; the heating device and the cooling device are both provided with a cover moving up and down and a support seat moving up and down, the molds and the bases are arranged between the cover and the support seat, the cover and the support seat are sealingly connected with the bases to form sealed cavities, the heating device injects steam into the sealed cavities to heat the molds and the forming cavities therein, the cooling device sprays cooling water and then performs vacuumization into the sealed cavities to cool the molds and products therein; the demolding device is provided with a demolding frame moving up and down and a demolding support seat moving up and down, the molds and the bases are arranged between the demolding frame and the demolding support seat, the demolding frame can drive the second bases and the upper molds thereon to move, the demolding frame is provided with an ejection plate moving up and down, the upper mold is provided with an ejection assembly, the ejection plate forces the ejection assembly to perform an ejection action. 2.The continuous production system according to claim 1, characterized in that: the conveying route of the conveying device is in a closed loop type or a linear loop type. 3.The continuous production system according to claim 2, characterized in that: the closed loop type is in a rectangular loop type, the conveying device comprises four conveying frames and four transplanters, the four conveying frames are sequentially connected end to end, the transplanters are arranged at the connection between adjacent two conveying frames to transfer the molds on the previous conveying frame to the next conveying frame; or, the closed loop type is in a circular loop type, the conveying device comprises a rotating disc capable of rotating around its own axis, a plurality of molds are arranged on the rotating disc and rotate with the rotating disc. 4.The continuous production system according to claim 2, characterized in that: ​ ​ ​ ​ ​ ​ ​ ​ ​ When the conveying route of the conveying device is set as a linear circulation type, the conveying device comprises two conveying frames arranged in an up-down manner and two elevators arranged at two ends of the conveying frames respectively, and the elevators move up and down between the two conveying frames.

5. The continuous production system according to claim 1, wherein: the upper mold is provided with a plurality of first air holes penetrating through the outer peripheral wall of the upper mold and communicating with the forming cavity; and / or, the lower mold is provided with a plurality of second air holes penetrating through the inner peripheral wall of the lower mold and communicating with the forming cavity.

6. The continuous production system according to claim 1, wherein: the demolding device is further provided with a product receiving assembly, which comprises a product receiving disc moving forward and backward, and the product receiving disc is arranged between the demolding frame and the base.

7. Continuous production process, characterized in that, The continuous production method comprises the following steps: filling step: the conveying device conveys the mold to the filling device, the filling support seat of the filling device lifts the base and the mold, the filling gun of the filling device is connected with the filling nozzle assembly of the mold, the filling gun opens the filling nozzle assembly and fills the mold with materials; heating and fusion step: the conveying device conveys the mold to the heating device, the support seat of the heating device lifts the base and the mold, the cover of the heating device and the support seat are both sealingly connected with the base to form a heating sealed cavity, steam is injected into the heating sealed cavity to heat the mold and the materials in the mold until the materials are fused and formed; cooling step: the conveying device conveys the mold to the cooling device, the support seat of the cooling device lifts the base and the mold, the cover of the cooling device and the support seat are both sealingly connected with the base to form a cooling sealed cavity, cooling water is sprayed into the cooling sealed cavity first, and then vacuumization is performed to cool the mold in the cooling sealed cavity; demolding step: the conveying device conveys the mold to the demolding device, the demolding support seat of the demolding device lifts the base and the mold, the mold comprises an upper mold and a lower mold, the demolding frame of the demolding device moves downward and separates the upper mold from the lower mold, the ejector plate of the demolding device forces the ejector assembly on the upper mold to eject the product downward, so that the product is separated from the upper mold, and after demolding, the demolding frame moves downward with the upper mold and closes with the lower mold.

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