Forming equipment for PP box

Abstract

The invention discloses PP box forming equipment, and relates to the technical field of injection molding, the PP box forming equipment comprises a first bottom frame and a second bottom frame, the top of the first bottom frame is provided with a material pipe, the second bottom frame is provided with a mounting box, and the top of the mounting box is provided with a top box; the extrusion forming mechanism comprises a supporting frame arranged at the top of the first bottom frame, a hopper is installed at the top of the supporting frame, the bottom of the hopper is communicated with the interior of the material pipe, a spiral feeding rod is connected to the inner wall of the material pipe through a bearing, and a heating system is arranged on the outer wall of the material pipe. According to the PP box forming equipment, the injection mold can be preheated, and the problem that the quality of an injection product is reduced due to the fact that a cold mold makes contact with a high-temperature melt is effectively solved.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding, in particular to a molding device for a PP box. Background Art

[0002] The molding of PP boxes is mainly based on injection molding technology. This technology uses an injection molding machine to inject molten PP material (polypropylene) into a preset mold, and then cools and solidifies the material to form the desired shape in the mold, and finally obtains a PP box product.

[0003] After the PP raw material is melted, as the temperature drops, the molecular chains gradually separate from the melt and form orderly crystals. The degree of crystallization of polypropylene will directly affect its material properties. The higher the crystallinity, the greater the Young's modulus and tensile strength, but the impact resistance and toughness will be weakened, and the material will become brittle. On the contrary, low crystallinity will show better impact resistance and toughness, but the tensile strength and Young's modulus will decrease.

[0004] However, the traditional PP box molding equipment has a relatively simple mold setting when in use. Before starting to use, the mold is basically in a cold state. When the cold mold comes into contact with the high-temperature melt, it will have a serious impact on the crystallization degree of PP and the quality of the plastic parts. Therefore, a new PP box molding equipment is urgently needed to solve the above problems. For example: in the early stage of processing, the mold temperature is low, far less than 40 degrees. After the hot PP melt enters the cold mold, the gloss of the plastic part will deteriorate. Among them, too high temperature will also cause the plastic part to be easily deformed after injection molding. However, the mold is connected to a cooling system. In the process of cooling and shaping the injection molded parts, the temperature of the mold will be lowered. Therefore, on the new PP box molding equipment, it is mainly necessary to preheat the cold mold before work. Summary of the invention

[0005] The invention discloses a PP box molding device, aiming to solve the technical problem that when the traditional PP box molding device is used, the setting of the mold is relatively simple, and before starting to use, the mold is basically in a cold state, and when the cold mold contacts with a high-temperature melt, the crystallization degree of PP and the quality of plastic parts will be seriously affected.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A PP box forming device comprises a first base frame and a second base frame, a material pipe is installed on the top of the first base frame, a mounting box is provided on the second base frame, a top box is provided on the top of the mounting box, and further comprises: an extrusion forming mechanism: the extrusion forming mechanism comprises a support frame arranged on the top of the first base frame, a material hopper is installed on the top of the support frame, the bottom of the material hopper is communicated with the inside of the material pipe, a spiral feeding rod is connected to the inner wall of the material pipe through a bearing, a heating system is provided on the outer wall of the material pipe, a motor is installed at one end of the material pipe, an output end of the motor is connected to one end of the spiral feeding rod, an extrusion head is provided at one end of the material pipe, a first mold and a second mold are respectively provided on the inner walls of both sides of the mounting box, one end of the extrusion head is communicated with the inside of the first mold, the first mold is fixedly connected to the mounting box, and the second mold is movably connected to the mounting box; Heat guiding mechanism: the heat guiding mechanism is used to guide the heat generated by the heating system; preheating mechanism: the preheating mechanism includes two mounting blocks symmetrically arranged on the inner wall of the mounting box, the inner walls of the two mounting blocks are hollow structures, and nozzles distributed equidistantly are inclined on the outer walls of the opposite sides of the two mounting blocks, and the nozzles located on the two mounting blocks are respectively directed to the first mold and the second mold; cooling mechanism: the cooling mechanism is respectively connected to the first mold and the second mold; heat preservation mechanism: the heat preservation mechanism is arranged inside the top box; sealing mechanism: the sealing mechanism is arranged on the second chassis.

[0007] In order to ensure that the raw materials can maintain appropriate temperature and fluidity during the transportation and plasticization process, the heating system needs to be turned on before the material is passed into the material pipe. In this solution, a heat guiding mechanism is set up to guide part of the heat generated by the heating to the two mounting blocks in the preheating mechanism. Before injection molding, the first mold and the second mold are kept in a separated state. The nozzles on the two mounting blocks can preheat the cold first mold and the second mold in a targeted manner, effectively avoiding the adverse effects of the cold first mold and the second mold after contact with the high-temperature melt, thereby ensuring the quality of the injection molded products.

[0008] In a preferred embodiment, the heat guiding mechanism includes a connecting rod arranged on one side of the support frame, a mounting pad is provided at one end of the connecting rod, an air pump is provided on the top outer wall of the mounting pad, a mounting pipe is installed at the air inlet end of the air pump, and an outlet pipe is installed at the air outlet end of the air pump, three joints are provided on the outlet pipe, and the three joints are all connected with guide pipes, wherein the two guide pipes located at both sides are respectively connected to the two mounting sleeve blocks, and the guide pipe located in the middle is connected to the insulation mechanism, a connecting sleeve is provided at the gap of the heating system, a cavity is formed between the connecting sleeve, the material pipe and the heating system, and fine slits distributed at equal distances are opened on the outer wall of the connecting sleeve, and the mounting pipe is connected to the interior of the cavity.

[0009] The gaps of the heating system are not insulated, and the cavity formed between the connecting sleeve, the material pipe and the heating system also has a high-temperature heating effect. Through the guidance of the air pump, air can be evacuated from the inside of the cavity through the mounting pipe. The gas enters through the dispersed fine gaps and is easily heated by the heating system to become high-temperature gas, so that it can be guided into the preheating mechanism and the heat preservation mechanism through the guide pipe. The heating system is used to preheat the material pipe, and the first mold and the second mold are preheated synchronously. The linkage and synchronization are strong, which avoids the trouble of preheating the two separately, and indirectly improves the processing efficiency.

[0010] In a preferred embodiment, the cooling mechanism includes a first water-cooling joint arranged on the outer wall of one side of the second base frame and a second water-cooling joint arranged on the outer wall of one side of the installation box. Cooling pipelines are provided on the inner walls of the first mold and the second mold. The first water-cooling joint is connected to the cooling pipeline in the second mold, and the second water-cooling joint is connected to the cooling pipeline in the first mold.

[0011] Overcooling and overheating of the first mold and the second mold will affect the quality of the injection molded product. The first mold and the second mold can be preheated by using a preheating mechanism to solve the impact of overcooling of the first mold and the second mold. The set water cooling mechanism can cool down the first mold and the second mold during the cooling and molding process to prevent them from reaching too high a temperature, thereby avoiding the adverse effect of overheating on the quality of the injection molded product.

[0012] In a preferred embodiment, the heat preservation mechanism includes a mounting groove arranged inside the top box, a vortex plate is installed on the inner wall of the mounting groove, the vortex plate and the mounting groove form a vortex channel, a plurality of air holes are provided on the bottom inner wall of the vortex channel, a plurality of baffles are installed on the inner walls on both sides of the vortex channel, the positions of the plurality of baffles correspond one to one with the positions of the plurality of air holes, a central guide hole is provided at the central position of the vortex channel, and the central guide hole is located directly above the first.

[0013] Through the provided heat preservation mechanism, the hot air guided by the guiding pipe can be introduced downward along the path of the eddy current channel into the interior of the installation box, mainly used to improve the heat preservation effect on the outer side when the first mold and the second mold are closed (after closing, the second mold is inserted into the interior of the first mold as the inner mold). Among them, the dispersed air holes can comprehensively heat and insulate the first mold and the second mold after closing, and the central guiding hole heats and insulates the first mold exposed to the outside, ensuring that the temperatures of the preheated first mold and the second mold will not drop after the injection molding process starts, and assisting in ensuring the quality of the injection molded product.

[0014] In a preferred solution, the plugging mechanism includes mounting seats provided on both sides of the outer wall of the top of the second chassis. A same plug board is slidably connected to the opposite sides of the two mounting seats. A baffle is provided on the outer wall of the bottom of the plug board. The baffle is arranged in a "冖" structure. Two connecting blocks are provided on one outer wall of the plug board. Telescopic rods are connected to the outer walls of the bottoms of the two connecting blocks. A second return spring is sleeved on the piston rod outer wall of the telescopic rod. Hooks are connected to both outer walls of the plug board through hinges. Card slots are provided on one outer wall of each of the two mounting seats. The hooks and the card slots are adapted to each other.

[0015] Through the provided plugging mechanism, it can be used in cooperation during the preheating process before the injection molding operation. The staff presses the plug board downward, so that the baffle in the "冖" structure blocks the position of the through hole inside the chassis. After plugging, the hook is hung into the card slot on the mounting seat, avoiding the hot air during the preheating process from being cooled by the outside air and ensuring the preheating effect.

[0016] As can be seen from the above, a PP box molding device includes a first base frame and a second base frame, a material tube is installed on the top of the first base frame, a mounting box is provided on the second base frame, and a top box is provided on the top of the mounting box, and also includes: an extrusion molding mechanism: the extrusion molding mechanism includes a support frame arranged on the top of the first base frame, a hopper is installed on the top of the support frame, the bottom of the hopper is communicated with the inside of the material tube, a spiral feeding rod is connected to the inner wall of the material tube through a bearing, a heating system is provided on the outer wall of the material tube, a motor is installed at one end of the material tube, the output end of the motor is connected to one end of the spiral feeding rod, an extrusion head is provided at one end of the material tube, a first mold and a second mold are respectively provided on the inner walls of both sides of the mounting box, and one end of the extrusion head is connected to the first mold The interior of the installation box is connected, the first mold is fixedly connected to the installation box, and the second mold is movably connected to the installation box; heat guiding mechanism: the heat guiding mechanism is used to guide the heat generated by the heating system; preheating mechanism: the preheating mechanism includes two installation blocks symmetrically arranged on the inner wall of the installation box, the inner walls of the two installation blocks are hollow structures, and nozzles distributed at equal distances are inclined on the outer walls of the opposite sides of the two installation blocks, and the nozzles located on the two installation blocks are respectively facing the first mold and the second mold; cooling mechanism: the cooling mechanism is respectively connected to the first mold and the second mold; heat preservation mechanism: the heat preservation mechanism is arranged inside the top box; blocking mechanism: the blocking mechanism is arranged on the second bottom frame. The molding equipment of the PP box provided by the present invention can preheat the injection mold, effectively avoiding the problem of reduced quality of the injection molded product caused by the contact between the cold mold and the high-temperature melt. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The figure is a schematic diagram of the overall structure of a PP box forming device proposed by the present invention.

[0018] Figure 2 It is a side view of a PP box forming device proposed by the present invention.

[0019] Figure 3 This is a structural diagram of the installation pipe of a PP box forming device proposed by the present invention.

[0020] Figure 4 The present invention provides a sectional side view of a material pipe of a PP box forming device.

[0021] Figure 5 The present invention is a side sectional view of an installation box of a PP box forming device proposed by the present invention.

[0022] Figure 6 The present invention provides a schematic diagram of the installation structure of the installation set of the PP box forming equipment.

[0023] Figure 7 This is a schematic diagram of the nozzle installation structure of a PP box molding device proposed by the present invention.

[0024] Figure 8 This is a schematic diagram of the spiral plate installation structure of a PP box forming device proposed by the present invention.

[0025] Fig. 9 This is a schematic diagram of the baffle installation structure of a PP box molding device proposed by the present invention.

[0026] In the figure: 1, first chassis; 2, second chassis; 3, conveyor belt; 4, installation box; 5, top box; 6, support frame; 7, hopper; 8, material pipe; 9, motor; 10, heating system; 11, guide pipe; 12, extruder; 14, first water-cooling joint; 15, second water-cooling joint; 16, connecting sleeve; 17, installation pipe; 18, air pump; 19, export pipe; 20, connecting rod; 21, spiral feeding rod; 22, cavity; 23, first mold; 24, second mold; 25, installation sleeve block; 26, vortex plate; 27, support plate; 28, first return spring; 29, nozzle; 30, air hole; 31, stop pad; 32, center guide hole; 33, mounting seat; 34, plug plate; 35, connecting block; 36, telescopic rod; 37, second return spring; 38, hook; 39, slot; 40, baffle. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0028] The PP box molding device disclosed in the present invention is mainly used for traditional PP box molding devices. When in use, the setting of the mold is relatively simple. Before starting to use, the mold is basically in a cold state. When the cold mold comes into contact with the high-temperature melt, it will have a serious impact on the crystallization degree of PP and the quality of plastic parts. Therefore, a new PP box molding device is urgently needed to solve the above-mentioned problem scenario.

[0029] Reference Figures 1 to 9, a PP box molding equipment, including a first base frame 1 and a second base frame 2, a material pipe 8 is installed on the top of the first base frame 1, a mounting box 4 is arranged on the second base frame 2, and a top box 5 is arranged on the top of the mounting box 4, and also includes: an extrusion molding mechanism: the extrusion molding mechanism includes a support frame 6 arranged on the top of the first base frame 1, a hopper 7 is installed on the top of the support frame 6, the bottom of the hopper 7 is communicated with the inside of the material pipe 8, a spiral feeding rod 21 is connected to the inner wall of the material pipe 8 through a bearing, a heating system 10 is arranged on the outer wall of the material pipe 8, a motor 9 is installed at one end of the material pipe 8, the output end of the motor 9 is connected to one end of the spiral feeding rod 21, an extrusion head 12 is arranged at one end of the material pipe 8, a first mold 23 and a second mold 24 are respectively arranged on the inner walls of the mounting box 4, and one end of the extrusion head 12 is connected to the first The interior of a mold 23 is communicated, the first mold 23 is fixedly connected to the installation box 4, and the second mold 24 is movably connected to the installation box 4; heat guiding mechanism: the heat guiding mechanism is used to guide the heat generated by the heating system 10; preheating mechanism: the preheating mechanism includes two installation blocks 25 symmetrically arranged on the inner wall of the installation box 4, the inner walls of the two installation blocks 25 are hollow structures, and nozzles 29 distributed at equal distances are inclined on the outer walls of the opposite sides of the two installation blocks 25, and the nozzles 29 located on the two installation blocks 25 are respectively facing the first mold 23 and the second mold 24; cooling mechanism: the cooling mechanism is respectively connected to the first mold 23 and the second mold 24; heat preservation mechanism: the heat preservation mechanism is arranged inside the top box 5; blocking mechanism: the blocking mechanism is arranged on the second base frame 2.

[0030] In actual use, in order to ensure that the raw materials can maintain appropriate temperature and fluidity during the transportation and plasticization process, the material pipe 8 needs to turn on the heating system 10 for heating before the material is passed in. In this solution, a heat guiding mechanism is set up to guide part of the heat generated by the heating to the two mounting blocks 25 in the preheating mechanism. Before injection molding, the first mold 23 and the second mold 24 are kept in a separated state. The nozzles 29 on the two mounting blocks 25 can be used to preheat the cold first mold 23 and the second mold 24, effectively avoiding the adverse effects of the cold first mold 23 and the second mold 24 in contact with the high-temperature melt, thereby ensuring the quality of the injection molded products.

[0031] The nozzles 29 on the two mounting blocks 25 are arranged opposite to each other and staggered. When the nozzles 29 on the two mounting blocks 25 spray air, the hot air sprayed from the nozzles 29 on both sides will not interfere with each other.

[0032] Reference Figure 3 , Figure 4 , Figure 6 and Figure 7In a preferred embodiment, the heat guiding mechanism includes a connecting rod 20 arranged on one side of the support frame 6, and a mounting pad is provided at one end of the connecting rod 20, and an air pump 18 is provided on the top outer wall of the mounting pad. A mounting pipe 17 is installed at the air inlet end of the air pump 18, and a guide pipe 19 is installed at the air outlet end of the air pump 18. Three joints are provided on the guide pipe 19, and the three joints are all connected with a guide pipe 11, wherein the two guide pipes 11 located at the two side positions are respectively connected to the two mounting sleeve blocks 25, wherein the guide pipe 11 located in the middle position is connected to the heat preservation mechanism, and a connecting sleeve 16 is provided at the gap of the heating system 10, and a cavity 22 is formed between the connecting sleeve 16 and the material pipe 8 and the heating system 10, and the outer wall of the connecting sleeve 16 is provided with fine slits distributed at equal distances, and the mounting pipe 17 is connected to the inside of the cavity 22.

[0033] Specifically, the gap of the heating system 10 is not insulated, and the cavity 22 formed between the connecting sleeve 16, the material pipe 8 and the heating system 10 also has a high-temperature heating effect. Through the guidance of the air pump 18, air can be evacuated from the inside of the cavity 22 through the mounting tube 17. The gas enters through the dispersed fine gaps and is easily heated by the heating system 10 to become a high-temperature gas. Thus, it can be guided into the preheating mechanism and the heat preservation mechanism through the guide tube 11. The preheating process of the material pipe 8 by the heating system 10 is used to simultaneously preheat the first mold 23 and the second mold 24. The linkage and synchronization are strong, which avoids the trouble of preheating the two separately, and indirectly improves the processing efficiency.

[0034] Reference Figure 2 , Figure 5 and Figure 6 In a preferred embodiment, the cooling mechanism includes a first water-cooling joint 14 arranged on the outer wall of one side of the second base frame 2 and a second water-cooling joint 15 arranged on the outer wall of one side of the installation box 4. Cooling pipelines are provided on the inner walls of the first mold 23 and the second mold 24. The first water-cooling joint 14 is connected to the cooling pipeline in the second mold 24, and the second water-cooling joint 15 is connected to the cooling pipeline in the first mold 23.

[0035] Specifically, overcooling and overheating of the first mold 23 and the second mold 24 will affect the quality of the injection molded product. The first mold 23 and the second mold 24 can be preheated by using a preheating mechanism to solve the effect of overcooling of the first mold 23 and the second mold 24. The water cooling mechanism can cool down the first mold 23 and the second mold 24 during the cooling and molding process to prevent them from reaching too high a temperature, thereby avoiding the adverse effect of overheating on the quality of the injection molded product.

[0036] Reference Figure 1 , Figure 2 , Figure 5 , Figure 6 and Figure 8, in a preferred embodiment, the heat preservation mechanism includes an installation groove provided inside the top box 5. The inner wall of the installation groove is installed with a spiral plate 26. The spiral plate 26 and the installation groove form a vortex channel. A plurality of air holes 30 are provided on the bottom inner wall of the vortex channel. A plurality of cushion pads 31 are installed on the two inner walls of the vortex channel. The plurality of cushion pads 31 correspond to the plurality of air holes 30 one by one. A central guide hole 32 is provided at the central position of the vortex channel. The central guide hole 32 is located directly above the first one.

[0037] Through the provided heat preservation mechanism, the hot air guided by the guiding pipe 11 can be introduced downward along the path of the vortex channel into the installation box 4, mainly used to improve the heat preservation effect on the outer side of the first mold 23 and the second mold 24 during mold closing (after mold closing, the second mold 24 is inserted into the first mold 23 as the inner mold). Among them, the scattered air holes 30 can comprehensively heat and insulate the first mold 23 and the second mold 24 after mold closing, and the central guide hole 32 heats and insulates the first mold 23 exposed to the outside, ensuring that after the injection molding process starts, the temperatures of the preheated first mold 23 and the second mold 24 will not drop, and assisting in ensuring the quality of the injection molded product.

[0038] Particularly, a cover plate is provided on the top outer wall of the top box 5, a handle is provided on one outer wall of the top box 5, and an installation joint is provided on one outer wall of the top box 5. One of the guiding pipes 11 is adapted to the installation joint. The top box 5 is connected to one side of the top outer wall of the installation box 4 through a hinge. Among them, the entire top box 5 is connected to the top of the installation box 4 through a hinge, acting as the cover of the installation box 4. When it is necessary to replace and repair the first mold 23 and the second mold 24, the entire top box 5 can be opened through the handle for disassembly and replacement. During this process, one of the guiding pipes 11 connected to the top box 5 can be first removed from the installation joint to avoid the guiding pipe 11 being pulled and broken.

[0039] Refer to Figure 1 、 Figure 2 and Fig. 9 , in a preferred embodiment, the plugging mechanism includes mounting seats 33 provided on both sides of the top outer wall of the second chassis 2. The same plug plate 34 is slidably connected to the opposite sides of the two mounting seats 33. A baffle 40 is provided on the bottom outer wall of the plug plate 34. The baffle 40 is set in a "冖" structure. Two connecting blocks 35 are provided on one outer wall of the plug plate 34. Telescopic rods 36 are connected to the bottom outer walls of the two connecting blocks 35. A second return spring 37 is sleeved on the piston rod outer wall of the telescopic rod 36. Hooks 38 are connected to both outer walls of the plug plate 34 through hinges. Card slots 39 are provided on one outer wall of each of the two mounting seats 33. The hooks 38 and the card slots 39 are adapted to each other.

[0040] Specifically, through the provided plugging mechanism, it can be used in cooperation during the preheating process before the injection molding operation. The staff presses the plug board 34 downward, so that the baffle 40 of the "冖" structure aligns with the through-hole position inside the chassis to block it. After blocking, the hook 38 is hooked into the card slot 39 on the mounting seat 33 to prevent the hot air during the preheating process from being cooled by the external gas, ensuring the preheating effect.

[0041] Referring to Figure 1 、 Figure 2 and Figure 3 , in a preferred embodiment, a conveyor belt 3 is installed on the inner wall of the second chassis 2, and a support plate 27 is hinged to the inner wall on one side of the second chassis 2. A row of first return springs 28 are provided on the outer wall of the bottom of the support plate 27. The bottom end of the support plate 27 is higher than the upper plane of the conveyor belt 3, and the baffle 40 is adapted to the conveyor belt 3.

[0042] The provided support plate 27 can cooperate with the first return springs 28 to achieve an elastic buffering effect, avoiding the hard collision between the just injection-molded product and the support plate 27 after demoulding, and ensuring the product quality to a certain extent.

[0043] Working principle: During use, first separate the first mold 23 and the second mold 24, and then turn on the heating system 10 on the outer wall of the material pipe 8. The heating system 10 starts to preheat the material pipe 8. During this process, under the guidance of the air pump 18, air can be pumped from the inside of the cavity 22 through the installation pipe 17. The air enters through the dispersed fine slits and is easily heated and raised to high-temperature gas by the heating system 10. Thus, it can be guided into the preheating mechanism and the heat preservation mechanism through the guiding pipe 11. Utilizing the preheating process of the heating system 10 for the material pipe 8, the first mold 23 and the second mold 24 are preheated synchronously. Then, the dried PP raw material is poured into the hopper 7, and at the same time, the first mold 23 and the second mold 24 are closed. The motor 9 is started to drive the screw feeding rod 21 to feed the material. During this process, the PP raw material will be heated into a melt at high temperature and finally extruded into the closed mold of the first mold 23 and the second mold 24 through the extrusion head 12, and then cooled and formed by the cooling mechanism, and finally conveyed and exported through the conveyor belt 3.

[0044] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A PP box forming device, comprising a first base frame (1) and a second base frame (2), wherein a material pipe (8) is installed on the top of the first base frame (1), an installation box (4) is provided on the second base frame (2), and a top box (5) is provided on the top of the installation box (4), characterized in that: Also includes: Extrusion molding mechanism: The extrusion molding mechanism comprises a support frame (6) arranged on the top of the first base frame (1), a hopper (7) is installed on the top of the support frame (6), the bottom of the hopper (7) is communicated with the inside of the material pipe (8), a spiral feeding rod (21) is connected to the inner wall of the material pipe (8) through a bearing, a heating system (10) is provided on the outer wall of the material pipe (8), a motor (9) is installed at one end of the material pipe (8), the output end of the motor (9) is connected to one end of the spiral feeding rod (21), an extrusion head (12) is provided at one end of the material pipe (8), a first mold (23) and a second mold (24) are respectively provided on the inner walls of both sides of the installation box (4), one end of the extrusion head (12) is communicated with the inside of the first mold (23), the first mold (23) is fixedly connected to the installation box (4), and the second mold (24) is movably connected to the installation box (4); Heat guiding mechanism: the heat guiding mechanism is used to guide the heat generated by the heating system (10); Preheating mechanism: the preheating mechanism comprises two mounting blocks (25) symmetrically arranged on the inner wall of the mounting box (4), the inner walls of the two mounting blocks (25) are both hollow structures, and nozzles (29) are obliquely arranged on the outer walls of the two mounting blocks (25) on opposite sides and distributed at equal distances, the nozzles (29) located on the two mounting blocks (25) are respectively directed toward the first mold (23) and the second mold (24); Cooling mechanism: the cooling mechanism is connected to the first mold (23) and the second mold (24) respectively; Heat preservation mechanism: the heat preservation mechanism is arranged inside the top box (5); Blocking mechanism: the blocking mechanism is arranged on the second base frame (2).

2. A PP box forming device according to claim 1, characterized in that: The nozzles (29) located on the two mounting blocks (25) are arranged opposite to each other and staggered.

3. A PP box forming device according to claim 1, characterized in that: The heat guiding mechanism comprises a connecting rod (20) arranged on one side of the support frame (6), a mounting pad being provided at one end of the connecting rod (20), an air pump (18) being provided on the top outer wall of the mounting pad, a mounting pipe (17) being installed at the air inlet end of the air pump (18), a guide pipe (19) being installed at the air outlet end of the air pump (18), three joints being provided on the guide pipe (11), the three joints being connected to guide pipes (11), wherein two guide pipes (11) located at two side positions are respectively connected to two mounting sleeve blocks (25), and one guide pipe (11) located in the middle position is connected to the heat preservation mechanism.

4. A PP box forming device according to claim 3, characterized in that: A connecting sleeve (16) is provided at the gap of the heating system (10), a cavity (22) is formed between the connecting sleeve (16), the material pipe (8) and the heating system (10), and fine slits distributed at equal distances are provided on the outer wall of the connecting sleeve (16), and the mounting tube (17) is connected to the interior of the cavity (22).

5. A PP box forming device according to claim 4, characterized in that: The cooling mechanism includes a first water-cooling joint (14) provided on the outer wall of one side of the second chassis (2) and a second water-cooling joint (15) provided on the outer wall of one side of the installation box (4). Cooling pipelines are provided on the inner walls of the first mold (23) and the second mold (24). The first water-cooling joint (14) is connected to the cooling pipeline in the second mold (24), and the second water-cooling joint (15) is connected to the cooling pipeline in the first mold (23).

6. A PP box forming device according to claim 5, characterized in that: The heat preservation mechanism includes an installation groove provided inside the top box (5). A spiral plate (26) is installed on the inner wall of the installation groove. The spiral plate (26) and the installation groove form a vortex channel. A plurality of air holes (30) are provided on the bottom inner wall of the vortex channel. A plurality of cushion pads (31) are installed on the inner walls on both sides of the vortex channel. The positions of the plurality of cushion pads (31) correspond to the positions of the plurality of air holes (30) one by one. A central guide hole (32) is provided at the central position of the vortex channel. The central guide hole (32) is located directly above the first one.

7. A PP box forming device according to claim 6, characterized in that: A cover plate is provided on the top outer wall of the top box (5). A handle is provided on the outer wall of one side of the top box (5), and an installation joint is provided on the outer wall of one side of the top box (5). One of the guiding pipes (11) is adapted to the installation joint. The top box (5) is connected to one side of the top outer wall of the installation box (4) through a hinge.

8. The PP box forming device according to claim 1, characterized in that: The plugging mechanism includes mounting seats (33) provided on both sides of the top outer wall of the second chassis (2). The same plug board (34) is slidably connected to the opposite sides of the two mounting seats (33). A baffle (40) is provided on the bottom outer wall of the plug board (34). The baffle (40) is configured in a "冖" structure.

9. A PP box forming device according to claim 8, characterized in that: Two connecting blocks (35) are provided on the outer wall of one side of the plug board (34). Expansion rods (36) are connected to the bottom outer walls of the two connecting blocks (35). A second return spring (37) is sleeved on the piston rod outer wall of the expansion rod (36). Hooks (38) are connected to both outer walls of the plug board (34) through hinges. Card slots (39) are provided on the outer walls of one side of the two mounting seats (33). The hooks (38) and the card slots (39) are adapted to each other.

10. A PP box forming device according to claim 8, characterized in that: A conveyor belt (3) is installed on the inner wall of the second chassis (2). A support plate (27) is connected to the inner wall of one side of the second chassis (2) through a hinge. A row of first return springs (28) is provided on the bottom outer wall of the support plate (27). The bottom end of the support plate (27) is higher than the upper plane of the conveyor belt (3). The baffle (40) is adapted to the conveyor belt (3).

Images