A halogen-free flame-retardant PC material without fluorine element, and its production equipment and method

Abstract

The present invention discloses a halogen-free flame-retardant PC material without fluorine element, and its production equipment and method, including an installation table, a driving mechanism and a mold-carrying mechanism. A fixed plate is fixed on the left side of the installation table, a fixing frame is fixed on the upper end surface of the fixed plate, a driving mechanism is installed on the fixing frame, the driving mechanism is connected with the mold-carrying mechanism, and a positioning mechanism is installed on the mold-carrying mechanism. The driving mechanism includes a second motor, a driving wheel, a threaded rod and a driven wheel. For the halogen-free flame-retardant PC material without fluorine element, its production equipment and method, by adopting a lifting mechanism, the up-and-down movement of the mold can be realized. Cooperating with the linked positioning mechanism, during the up-and-down movement of the mold, the automatic position adjustment of the mold can be realized, thus facilitating the later docking of the mold with the mold flange. Then, cooperating with the linked lateral movement structure, when the mold reaches the fixed position, the mold can be automatically laterally moved to dock with the mold flange, greatly improving the convenience of mold installation.

Description

Technical Field

[0001] The present invention relates to the technical field of the production of halogen-free flame-retardant PC materials, and specifically relates to a halogen-free flame-retardant PC material without fluorine element, and its production equipment and method. Background Art

[0002] The halogen-free flame-retardant PC material is an environmentally friendly material without halogen elements. It has good transparency, high temperature resistance, excellent toughness, dimensional stability, high flame-retardant grade, and excellent mechanical properties, and is widely used in industry;

[0003] During the production process of the halogen-free flame-retardant PC material, it is necessary to plastically process the molten halogen-free flame-retardant PC through an extruder and a corresponding mold, so that the halogen-free flame-retardant PC material can be processed into a specific shape for use. In the actual use process of the existing extruder for halogen-free flame-retardant PC materials, when disassembling and assembling the mold, due to the heavy overall quality of the mold, two or even more workers are required to cooperate for disassembly and assembly, which is rather troublesome. Therefore, in view of the above problems, a production equipment for halogen-free flame-retardant PC materials without fluorine element is designed to better meet the actual use requirements. Summary of the Invention

[0004] The purpose of the present invention is to provide a halogen-free flame-retardant PC material without fluorine element, and its production equipment and method, so as to solve the problems raised in the above background art.

[0005] To achieve the above object, the present invention provides the following technical solution: A production device for a halogen-free flame-retardant PC material without fluorine element, comprising an installation table, a driving mechanism and a mold-carrying mechanism. A fixed plate is fixed on the left side of the installation table, a fixing frame is fixed on the upper end surface of the fixed plate, a driving mechanism is installed on the fixing frame, the driving mechanism is connected to the mold-carrying mechanism, and a positioning mechanism is installed on the mold-carrying mechanism. The driving mechanism includes a second motor, a driving wheel, a threaded rod and a driven wheel. The second motor is fixed on the fixing frame, the output end of the second motor is fixed with the driving wheel, the threaded rod is connected to the fixing frame by bearings, the driven wheel is fixed on the threaded rod, and the driven wheel is connected to the driving wheel through a belt. The mold-carrying mechanism includes a bottom plate, a connecting block, an installation frame, a guide rod, a vertical rod, a first spring, a bracket, a slider and a connecting rod. The bottom plate is arranged above the fixed plate, connecting blocks are symmetrically fixed on the front and back of the bottom plate, the connecting blocks are connected to the threaded rod through threads, installation frames are symmetrically arranged on the front and back above the bottom plate, guide rods are fixed on the installation frames, vertical rods are symmetrically fixed on the lower end surface of the installation frames, the vertical rods are slidably connected to the bottom plate, one end of a first spring is also fixed on the lower end surface of the installation frame, the other end of the first spring is fixed on the bottom plate, a bracket is arranged above the installation frame, a slider is fixed on the lower end surface of the bracket, the slider is slidably connected to the guide rod, and one end of a connecting rod is also rotatably connected to the lower end surface of the bracket, and the other end of the connecting rod is rotatably connected to the bottom plate.

[0006] Preferably, a control panel is fixed on the upper end surface of the installation table, an extruder is also fixed on the upper end surface of the installation table, and the extruder is driven by a first motor fixed on the installation table. At the same time, a feeding cylinder is installed on the upper end surface of the extruder, and a loosening mechanism is installed on the feeding cylinder. Through the above mechanism, the normal production and processing of materials can be ensured.

[0007] Preferably, heating sleeves are uniformly installed on the outer surface of the extruder, and a mold flange is fixed at the left end discharge port of the extruder. Through the action of the heating sleeves, the materials in the extruder can be heated, so that the materials are melted to ensure normal processing.

[0008] Preferably, the loosening mechanism includes a rotating shaft, a driven gear, a driving gear and a stirring rod. The rotating shaft is connected to the feeding cylinder by bearings, a driven gear is fixed at the right end of the rotating shaft, and the driven gear meshes with the driving gear fixed at the output end of the first motor. Through the transmission between the driven gear and the driving gear, a basic acting force can be provided for the rotation of the rotating shaft and the stirring rod.

[0009] Preferably, a stirring rod is also fixed on the rotating shaft, and the stirring rod is arranged in the feeding cylinder. By stirring the materials in the feeding cylinder with the stirring rod, the blockage of the materials can be avoided, thus affecting the normal feeding function.

[0010] Preferably, inclined panels are symmetrically and fixedly arranged on the front and back of the fixing frame, and a roller is also connected to the fixing frame by a bearing. The lower end surface of the roller is flush with the upper end surface of the mold flange. Through the rolling action of the roller, the mold can be conveniently moved horizontally, thus facilitating the installation of the mold.

[0011] Preferably, the positioning mechanism includes a movable plate, a cross bar, an arc panel and a second spring. The movable plate is arranged above the bracket, and one ends of the cross bar are symmetrically and fixedly arranged on the front and back of the movable plate. The cross bar is slidably connected to the bracket. When the movable plate moves, the sliding guiding action between the cross bar and the bracket can ensure the stability of the movement of the movable plate.

[0012] Preferably, the other end of the cross bar is fixed on the arc panel. The arc panel is slidably connected to the inclined panel. One end of the second spring is fixed on the arc panel, and the other end of the second spring is fixed on the bracket. Through the sliding action between the arc panel and the inclined panel, a basic acting force can be provided for the movement of the movable plate. With the elastic action of the second spring, a basic guarantee can be provided for the automatic reset of the movable plate.

[0013] The production method of a halogen-free flame-retardant PC material without fluorine element includes the following steps:

[0014] Step 1: Place the mold on the bracket. Through the actions of the second motor, the driving wheel, the threaded rod, the driven wheel and the connecting block, drive the mold to move upward. With the cooperation of the movable plate, the cross bar, the arc panel, the second spring and the inclined panel, when the mold moves upward, the mold can be moved to the middle position of the bracket. When the mold contacts the roller, with the cooperation of the connecting rod, the bracket and the mold can be moved towards the mold flange to facilitate the installation of the mold;

[0015] Step 2: Put the materials into the feeding cylinder. The materials enter the extruder through the feeding cylinder. With the cooperation of the dial rod, the materials can be stirred to avoid material blockage. Then, through the actions of the heating sleeve and the extruder, the materials are melted and extruded to produce the halogen-free flame-retardant PC material.

[0016] The proportion of the halogen-free flame-retardant PC material without fluorine element includes: 75%-95% of polycarbonate, 0.05%-0.1% of halogen-free flame retardant, 5%-15% of organic montmorillonite, 0.1%-1% of anti-dripping agent, 0.1%-1% of hydrolysis-resistant stabilizer, 0.1%-0.5% of antioxidant, and 0.1%-1% of lubricant.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: The halogen-free flame-retardant PC material without fluorine element, its production equipment and method adopt a lifting mechanism, which can realize the up-and-down movement of the mold. Cooperating with the linked positioning mechanism, during the up-and-down movement of the mold, the automatic position adjustment of the mold can be realized, thus facilitating the later docking of the mold with the mold flange. Then, cooperating with the linked transverse movement structure, when the mold reaches the fixed position, the mold can be automatically transversely moved to dock with the mold flange, greatly improving the convenience of mold installation. The specific content is as follows:

[0018] 1. For the halogen-free flame-retardant PC material without fluorine element, its production equipment and method, when installing the mold, through the action of the second motor, the driving wheel, the threaded rod, and the driven wheel connecting block, the bottom plate and the bracket can be lifted, thereby driving the mold to move upward. During the upward movement of the mold, with the sliding effect between the arc-shaped plate and the inclined plate, the movable plate can be moved. Through the action of the two movable plates, the mold can be pushed to the middle position of the bracket, thus realizing the position adjustment of the mold, and further providing a basic guarantee for the later mold installation;

[0019] 2. For the halogen-free flame-retardant PC material without fluorine element, its production equipment and method, when the mold moves upward to contact the roller, with the action of the first spring and the connecting rod, the bracket can drive the mold to move horizontally, enabling the mold to be docked and positioned with the mold flange, facilitating the installation of the mold. And through the rolling action of the roller, the friction force can be effectively reduced to ensure the normal horizontal movement of the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is an isometric three-dimensional structure schematic diagram of the whole device of the present invention;

[0021] Figure 2 It is a side three-dimensional structure schematic diagram of the whole device of the present invention;

[0022] Figure 3 It is a sectional three-dimensional structure schematic diagram of the feed cylinder and the loosening mechanism of the present invention;

[0023] Figure 4 It is an isometric three-dimensional structure schematic diagram of the fixing frame of the present invention;

[0024] Figure 5 It is a bottom three-dimensional structure schematic diagram of the fixing frame of the present invention;

[0025] Figure 6 It is an isometric three-dimensional structure schematic diagram of the mold-carrying mechanism and the positioning mechanism of the present invention;

[0026] Figure 7 It is a bottom three-dimensional structure schematic diagram of the mold-carrying mechanism and the positioning mechanism of the present invention.

[0027] In the figure: 1, mounting table; 2, control panel; 3, extruder; 301, heating jacket; 302, die flange; 4, first motor; 5, feed cylinder; 6, loosening mechanism; 601, rotating shaft; 602, driven gear; 603, driving gear; 604, lever; 7, fixing plate; 8, fixing bracket; 801, inclined panel; 802, roller; 9, driving mechanism; 901, second motor; 902, driving wheel; 903, threaded rod; 904, driven wheel; 10, die-carrying mechanism; 1001, bottom plate; 1002, connecting block; 1003, mounting frame; 1004, guide rod; 1005, vertical rod; 1006, first spring; 1007, bracket; 1008, slider; 1009, connecting rod; 11, positioning mechanism; 1101, movable plate; 1102, cross bar; 1103, arc-shaped panel; 1104, second spring. Detailed implementation mode

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0029] Please refer to Figures 1-7, the present invention provides a technical solution: a halogen-free flame-retardant PC material without fluorine element, its production equipment and method, including an installation table 1, a driving mechanism 9 and a mold-carrying mechanism 10. A fixing plate 7 is fixed on the left side of the installation table 1, a fixing frame 8 is fixed on the upper end surface of the fixing plate 7, a driving mechanism 9 is installed on the fixing frame 8, the driving mechanism 9 is connected to the mold-carrying mechanism 10, and a positioning mechanism 11 is installed on the mold-carrying mechanism 10. The driving mechanism 9 includes a second motor 901, a driving wheel 902, a threaded rod 903 and a driven wheel 904. The second motor 901 is fixed on the fixing frame 8, the output end of the second motor 901 is fixed with the driving wheel 902, the threaded rod 903 is connected by bearings to the fixing frame 8, the driven wheel 904 is fixed on the threaded rod 903, and the driven wheel 904 is connected to the driving wheel 902 through a belt. The mold-carrying mechanism 10 includes a bottom plate 1001, a connecting block 1002, an installation frame 1003, a guide rod 1004, a vertical rod 1005, a first spring 1006, a bracket 1007, a slider 1008 and a connecting rod 1009. The bottom plate 1001 is arranged above the fixing plate 7, connecting blocks 1002 are symmetrically fixed on the front and back of the bottom plate 1001, and the connecting blocks 1002 are connected to the threaded rod 903 through threads. Installation frames 1003 are symmetrically arranged on the front and back above the bottom plate 1001, guide rods 1004 are fixed on the installation frames 1003, vertical rods 1005 are symmetrically fixed on the lower end surfaces of the installation frames 1003 on the left and right, and the vertical rods 1005 are slidably connected to the bottom plate 1001. One end of a first spring 1006 is also fixed on the lower end surface of the installation frame 1003, and the other end of the first spring 1006 is fixed on the bottom plate 1001. A bracket 1007 is arranged above the installation frame 1003, a slider 1008 is fixed on the lower end surface of the bracket 1007, and the slider 1008 is slidably connected to the guide rod 1004. One end of a connecting rod 1009 is also rotatably connected to the lower end surface of the bracket 1007, and the other end of the connecting rod 1009 is rotatably connected to the bottom plate 1001.

[0030] Heating sleeves 301 are uniformly installed on the outer surface of the extruder 3, and a mold flange 302 is fixed at the left end discharge port of the extruder 3; inclined panels 801 are symmetrically fixed on the front and back of the fixing frame 8, a roller 802 is also connected by bearings to the fixing frame 8, and the lower end surface of the roller 802 is flush with the upper end surface of the mold flange 302; the positioning mechanism 11 includes a movable plate 1101, a cross bar 1102, an arc-shaped panel 1103 and a second spring 1104. The movable plate 1101 is arranged above the bracket 1007, one end of a cross bar 1102 is symmetrically fixed on the front and back of the movable plate 1101, and the cross bar 1102 is slidably connected to the bracket 1007; the other end of the cross bar 1102 is fixed on the arc-shaped panel 1103, the arc-shaped panel 1103 is slidably connected to the inclined panel 801, one end of a second spring 1104 is fixed on the arc-shaped panel 1103, and the other end of the second spring 1104 is fixed on the bracket 1007;

[0031] When using the production equipment for the halogen-free flame-retardant PC material without fluorine element, such as Figures 1-7 shown in the figure, first select a suitable mold for installation according to production requirements, place the mold on the bracket 1007, and then start the second motor 901. By driving the rotation of the driving wheel 902 by the second motor 901, and with the transmission between the driving wheel 902 and the driven wheel 904, the two threaded rods 903 can rotate synchronously. Then, with the threaded connection between the threaded rod 903 and the connecting block 1002, the bottom plate 1001, the bracket 1007 and the mold can move upward. When the bracket 1007 moves upward, it synchronously drives the arc-shaped panel 1103 to move upward. When the arc-shaped panel 1103 contacts and slides with the inclined panel 801, at this time, the arc-shaped panel 1103 moves under force. With the sliding between the cross bar 1102 and the bracket 1007, the movable plate 1101 is synchronously forced to move. When the movable plate 1101 contacts the mold, the mold can be pushed. Through the pushing of the two groups of movable plates 1101, the mold can be moved to the middle position of the bracket 1007, thus realizing the adjustment of the mold position. When the arc-shaped panel 1103 continues to move upward and separates from the inclined panel 801, with the elastic action of the second spring 1104, the movable plate 1101 can be automatically reset to avoid the movable plate 1101 affecting the subsequent lateral movement of the mold. At this time, the bottom plate 1001, the bracket 1007 and the mold continue to move upward. When the mold moves to contact the lower end surface of the roller 802, the height positioning of the mold is realized. At this time, the bottom plate 1001 continues to move upward. With the elastic action of the first spring 1006, the distance between the bottom plate 1001 and the bracket 1007 is reduced. Then, with the transmission of the connecting rod 1009, the bracket 1007 is forced to move laterally. With the sliding and guiding between the slider 1008 and the guide rod 1004, the stability of the movement of the bracket 1007 can be ensured, thus realizing the lateral movement of the mold. Since the size of the mold is equal to the size of the mold flange 302, when the mold bracket 1007 drives the mold to move laterally, the bracket 1007 can contact and slide with the lower end surface of the mold flange 302 to ensure the normal lateral movement of the mold until the mold contacts the mold flange 302. Thus, the automatic positioning of the mold can be realized. Finally, the mold and the mold flange 302 can be locked by bolts manually, and the operation is convenient and simple;

[0032] A control panel 2 is fixed to the upper end face of the installation table 1, and an extruder 3 is also fixed to the upper end face of the installation table 1. The extruder 3 is driven by a first motor 4 fixed to the installation table 1. At the same time, a feed hopper 5 is installed on the upper end face of the extruder 3, and a loosening mechanism 6 is installed on the feed hopper 5. The loosening mechanism 6 includes a rotating shaft 601, a driven gear 602, a driving gear 603, and a stirring rod 604. The rotating shaft 601 is connected to the feed hopper 5 by bearings. The right end of the rotating shaft 601 is fixed with the driven gear 602, and the driven gear 602 meshes with the driving gear 603 fixed to the output end of the first motor 4. The rotating shaft 601 is also fixed with the stirring rod 604, and the stirring rod 604 is arranged inside the feed hopper 5.

[0033] After the mold is installed, as Figures 1-3 shown, put the material into the feed hopper 5, and start the first motor 4 and the heating jacket 301. The material enters the extruder 3 through the feed hopper 5. With the cooperation of the heating jacket 301, the heating and melting of the material can be realized. With the cooperation of the first motor 4 driving the screw conveyor of the extruder 3 to rotate, the molten material can be moved, and the material can be extruded through the mold. During the extrusion process, the driving gear 603 can be synchronously driven to rotate by the first motor 4. With the transmission between the driving gear 603 and the driven gear 602, the rotating shaft 601 and the stirring rod 604 can be rotated. Through the action of the stirring rod 604, the material in the feed hopper 5 can be stirred, so as to avoid the blockage of the material in the feed hopper 5 and affect the normal feeding function, and then ensure the normal operation of the device.

[0034] The production method of a halogen-free flame-retardant PC material without fluorine element includes the following steps:

[0035] Step 1: Place the mold on the bracket 1007. Through the action of the second motor 901, the driving wheel 902, the threaded rod 903, the driven wheel 904, and the connecting block 1002, drive the mold to move upward. With the cooperation of the movable plate 1101, the cross bar 1102, the arc-shaped panel 1103, the second spring 1104, and the inclined panel 801, when the mold moves upward, the mold can be moved to the middle position of the bracket 1007. When the mold contacts the roller 802, with the cooperation of the connecting rod 1009, the bracket 1007 and the mold can be moved towards the mold flange 302 for the installation of the mold.

[0036] Step 2: Put the material into the feed hopper 5. The material enters the extruder 3 through the feed hopper 5. With the cooperation of the stirring rod 604, the stirring of the material can be realized to avoid material blockage. Then, through the action of the heating jacket 301 and the extruder 3, the material is melted and extruded to realize the production of the halogen-free flame-retardant PC material.

[0037] The formulation of the halogen-free flame-retardant PC material without fluorine element includes: polycarbonate PC 75%-95%, halogen-free flame retardant 0.05%-0.1%, organic montmorillonite 5%-15%, anti-dripping agent 0.1%-1%, hydrolysis-resistant stabilizer 0.1%-1%, antioxidant 0.1%-0.5%, and lubricant 0.1%-1%.

[0038] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Production equipment for a halogen-free flame-retardant PC material without fluorine element, comprising an installation table (1), a feed cylinder (5), a driving mechanism (9) and a mold-carrying mechanism (10). A fixed plate (7) is fixed on the left side of the installation table (1), a fixed frame (8) is fixed on the upper end surface of the fixed plate (7), a driving mechanism (9) is installed on the fixed frame (8), the driving mechanism (9) is connected to the mold-carrying mechanism (10), and a positioning mechanism (11) is installed on the mold-carrying mechanism (10), characterized in that: On the fixing frame (8), inclined panels (801) are symmetrically fixed before and after, and a roller (802) is also connected to the fixing frame (8) by bearings. Moreover, the lower end surface of the roller (802) is flush with the upper end surface of the die flange (302). The driving mechanism (9) includes a second motor (901) fixed on the fixing frame (8). The output end of the second motor (901) is fixed with a driving wheel (902). A threaded rod (903) is connected to the fixing frame (8) by bearings. A driven wheel (904) is fixed on the threaded rod (903). The driven wheel (904) is connected to the driving wheel (902) by a belt. The die-carrying mechanism (10) is arranged on a bottom plate (1001) above the fixing plate (7). On the bottom plate (1001), connecting blocks (1002) are symmetrically fixed before and after. The connecting blocks (1002) are connected to the threaded rod (903) by threads. Above the bottom plate (1001), mounting frames (1003) are symmetrically arranged before and after. Guide rods (1004) are fixed on the mounting frames (1003). On the lower end surface of the mounting frames (1003), vertical rods (1005) are symmetrically fixed on the left and right. The vertical rods (1005) are slidably connected to the bottom plate (1001). One end of a first spring (1006) is also fixed on the lower end surface of the mounting frames (1003). The other end of the first spring (1006) is fixed on the bottom plate (1001). Above the mounting frames (1003), a bracket (1007) is arranged. A slider (1008) is fixed on the lower end surface of the bracket (1007). The slider (1008) is slidably connected to the guide rod (1004). One end of a connecting rod (1009) is also rotatably connected to the lower end surface of the bracket (1007). The other end of the connecting rod (1009) is rotatably connected to the bottom plate (1001). A loosening mechanism (6) is installed on the feeding cylinder (5). The loosening mechanism (6) includes a rotating shaft (601), a driven gear (602), a driving gear (603), and a stirring rod (604). The rotating shaft (601) is connected to the feeding cylinder (5) by bearings. The right end of the rotating shaft (601) is fixed with a driven gear (602). The driven gear (602) meshes with the driving gear (603) fixed on the output end of the first motor (4).

2. The production equipment of a halogen-free flame-retardant PC material without fluorine element according to claim 1, characterized in that: A control panel (2) is fixed on the upper end surface of the installation table (1). Moreover, an extruder (3) is fixed on the upper end surface of the installation table (1). The extruder (3) is driven by a first motor (4) fixed on the installation table (1). At the same time, a feeding cylinder (5) is installed on the upper end surface of the extruder (3).

3. The production equipment of a halogen-free flame-retardant PC material without fluorine element according to claim 2, characterized in that: Heating sleeves (301) are uniformly installed on the outer surface of the extruder (3). A die flange (302) is fixed at the left end discharge port of the extruder (3).

4. The production equipment of a halogen-free flame-retardant PC material without fluorine element according to claim 3, characterized in that: A stirring rod (604) is also fixed on the rotating shaft (601). The stirring rod (604) is arranged inside the feeding cylinder (5).

5. The production equipment of a halogen-free flame-retardant PC material without fluorine element according to claim 4, characterized in that: The positioning mechanism (11) includes a movable plate (1101), a cross bar (1102), an arc-shaped panel (1103) and a second spring (1104). The movable plate (1101) is arranged above the bracket (1007). One ends of the cross bar (1102) are symmetrically fixed on the front and back of the movable plate (1101), and the cross bar (1102) is slidably connected to the bracket (1007).

6. The production equipment of a halogen-free flame-retardant PC material without fluorine element according to claim 5, characterized in that: The other ends of the cross bar (1102) are fixed on the arc-shaped panel (1103), and the arc-shaped panel (1103) is slidably connected to the inclined panel (801). One end of the second spring (1104) is fixed on the arc-shaped panel (1103), and the other end of the second spring (1104) is fixed on the bracket (1007).

7. A production method of a halogen-free flame-retardant PC material without fluorine element, which uses the production equipment of a halogen-free flame-retardant PC material without fluorine element described in any one of claims 1-6, characterized in that: The production method of the halogen-free flame-retardant PC material without fluorine element includes the following steps: Step 1: Place the mold on the bracket (1007). Through the action of the second motor (901), the driving wheel (902), the threaded rod (903), the driven wheel (904) and the connecting block (1002), drive the mold to move upward. With the cooperation of the movable plate (1101), the cross bar (1102), the arc-shaped panel (1103), the second spring (1104) and the inclined panel (801), when the mold moves upward, the mold can be moved to the middle position of the bracket (1007). When the mold contacts the roller (802), with the cooperation of the connecting rod (1009), the bracket (1007) and the mold can be moved towards the mold flange (302) for the installation of the mold; Step 2: Put the material into the feeding cylinder (5). The material enters the extruder (3) through the feeding cylinder (5). With the cooperation of the dial rod (604), the material can be stirred to avoid material blockage. Then, through the action of the heating sleeve (301) and the extruder (3), the material is melted and extruded to produce the halogen-free flame-retardant PC material.

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