A modified plastic preparation process and modified plastic

Abstract

The present invention relates to the field of plastic preparation, and more specifically, to a modified plastic preparation process and modified plastic. The process comprises the following steps: step 1: preparing plastic raw materials and melting them; step 2: preparing additives for changing plastic properties and melting them; step 3: fully mixing the materials in step 1 and step 2; step 4: discharging and extruding, granulating, cooling and collecting the modified plastic mixed in step 3. The weight fraction ratio of each component of the plastic is: 70 parts of polystyrene; 3 parts of glass fiber; 4 parts of mica; 2 parts of matting agent; 2 parts of antioxidant; 2 parts of flame retardant; 2 parts of plasticizer. It has the advantage of being able to clean the molding holes of the modified plastic.

Description

Technical Field

[0001] The invention relates to the field of plastic preparation, and more particularly to a modified plastic preparation process and the modified plastic. Background Art

[0002] Modified plastics refer to plastic products that are modified on the basis of general-purpose plastics and engineering plastics through filling, blending, reinforcement and other methods to improve their flame retardancy, strength, impact resistance, toughness and other properties.

[0003] The invention with patent number 112625342 discloses a graphene-modified plastic and its preparation method and application. The raw materials for preparing the graphene-modified plastic include graphene-coated plastic, filler and additives. The graphene-coated plastic is a powder material formed by graphene powder coated on the surface of plastic powder. The invention has the disadvantage that the molding holes of the modified plastic cannot be cleaned. Summary of the invention

[0004] The purpose of the present invention is to provide a modified plastic preparation process and the modified plastic, which have the advantage of being able to clean the molding holes of the modified plastic.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] A modified plastic preparation process, the process comprising the following steps:

[0007] Step 1: Prepare the plastic raw materials and melt them;

[0008] Step 2: Prepare additives that change the properties of plastics and melt them;

[0009] Step 3: Mix the materials in step 1 and step 2 thoroughly;

[0010] Step 4: The modified plastic mixed in step 3 is discharged and extruded, granulated, cooled and collected.

[0011] The weight fraction ratio of each component of the plastic is: 70 parts of polystyrene; 3 parts of glass fiber; 4 parts of mica; 2 parts of matting agent; 2 parts of antioxidant; 2 parts of flame retardant; and 2 parts of plasticizer.

[0012] The modified plastic preparation process also uses a modified plastic preparation device, which includes a mixing barrel for mixing and preparing plastics, an extrusion tube fixed to the lower end of the mixing barrel, a plurality of forming holes arranged at the end of the extrusion tube, and a pushing block sliding on the extrusion tube.

[0013] Furthermore, it also includes a threaded rod fixedly connected to the pushing block, and a threaded gear that drives the threaded rod to slide through threads, and the threaded gear rotates on the extrusion tube.

[0014] Furthermore, it also includes a pushing rod sliding on the pushing block, and a cleaning pipe fixedly connected to the pushing rod and corresponding to the multiple forming holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0016] Figure 1 It is a process flow chart for preparing modified plastics;

[0017] Figure 2 It is a drawing of the molded parts of modified plastics;

[0018] Figure 3 yes Figure 2 A partial enlarged view of the structure shown;

[0019] Figure 4 It is the extrusion structure diagram of extrusion modified plastic;

[0020] Figure 5 It is a schematic diagram of the structure for cleaning multiple forming holes;

[0021] Figure 6 It is a half-section view of the extruded modified plastic structure;

[0022] Figure 7 It is a schematic diagram of the structure of mixed modified plastics;

[0023] Figure 8 Yes Drive Figure 7 A schematic diagram of the structure of the lifting structure shown;

[0024] Fig. 9 It is a schematic diagram of the structure of the inner barrel;

[0025] Fig.10 It is a schematic diagram of the structure of mixed modified plastics;

[0026] Fig.11 yes Fig.10 Schematic diagram of part of the structure shown. DETAILED DESCRIPTION

[0027] refer to Figure 1 , detailed description of the implementation process of preparing modified plastics:

[0028] A modified plastic preparation process, the process comprising the following steps:

[0029] Step 1: preparing plastic raw materials, which may be one or more of polypropylene, polyethylene, polystyrene, styrene-acrylonitrile copolymer, and polymethacrylate. The present invention mainly processes modified plastics with polystyrene as the main material. After preparing the raw materials, they are melted to facilitate mixing of subsequent additives.

[0030] Step 2: Prepare additives that change the properties of plastics and melt them, prepare substances that can modify the plastic raw materials and melt them;

[0031] Step 3: fully mixing the materials in step 1 and step 2, so that the raw materials of the modified plastic are fully mixed and then the modified plastic is processed;

[0032] Step 4: The modified plastic mixed in step 3 is discharged and extruded, granulated, cooled and collected.

[0033] refer to Figure 1 , detail the composition of the raw materials of modified plastics:

[0034] In the step three, the weight ratio of the plastic raw material to the additive is 7:3, and the properties of the plastic are changed by adding the additive.

[0035] refer to Figure 1 , detail the implementation process of mixing the raw materials of modified plastics:

[0036] The mixing time in step three is 38 minutes, so that the raw materials of the modified plastic can be fully mixed.

[0037] refer to Figure 1 , detailed description of the implementation process of mixing and preparing modified plastics to prevent the raw materials from solidifying:

[0038] The mixing temperature in step three is 60° C. to prevent the raw materials of the modified plastic from solidifying due to the low temperature during the mixing process, resulting in the inability to mix the modified plastic, affecting the preparation speed of the modified plastic, and also causing damage to the modified plastic preparation device, reducing the service life of the parts.

[0039] refer to Figure 2 and 3 , detailed description of the implementation process of extrusion molding modified plastics:

[0040] The modified plastic preparation process also uses a modified plastic preparation device, which includes a mixing barrel 12 for mixing and preparing plastics and an extrusion tube 11 fixedly connected to the lower end of the mixing barrel 12. The mixing barrel 12 acts as a container for loading raw materials for preparing modified plastics. The extrusion tube 11 at the lower end of the mixing barrel 12 is mainly used for loading the mixed plastic fluid, and then the mixed modified plastic is extruded in the extrusion tube 11 to expel air to prevent the existence of bubbles, which is convenient for the subsequent molding of modified plastic particles. The end of the extrusion tube 11 is provided with a plurality of molding holes 13, and the plurality of molding holes 13 are used for preparing A modified plastic rod having the same shape as the forming hole 13 is produced, and the processed modified plastic rod is then cut by an external cutting device to realize the processing of modified plastic particles. A pushing block 21 is slidably connected to the extrusion tube 11, and the sliding of the pushing block 21 pushes the mixed modified plastic to be extruded toward the multiple forming holes 13 to thereby process the modified plastic rod. A switch is provided at the connection between the mixing barrel 12 and the extrusion tube 11. When the switch is turned on, the material in the mixing barrel 12 is discharged. When the switch is turned off, the material in the mixing barrel 12 is prevented from continuing to be discharged, thereby affecting the extrusion molding of the modified plastic at the lower end.

[0041] refer to Figure 4 , 5 and 6, detailing the implementation process of driving the push block to slide to complete the extrusion molding of the modified plastic:

[0042] A threaded rod 22 is fixedly connected to the pushing block 21, and the threaded rod 22 and the threaded gear 41 are transmitted by thread. The threaded gear 41 is rotatably connected to the extrusion tube 11. When the threaded gear 41 rotates, the threaded rod 22 is driven by the thread of the inner wall. The threaded rod 22 is slidably connected to the extrusion tube 11. When the threaded rod 22 slides, it drives the pushing block 21 to slide, thereby realizing the extrusion molding of the modified plastic. A reduction motor I is fixedly connected to the extrusion tube 11, and a gear I is fixedly connected to the output shaft of the reduction motor I. The gear I is meshed with the threaded gear 41 for transmission. The reduction motor I drives the gear I to mesh and drive the threaded gear 41 to rotate, thereby driving the threaded rod 22 to slide, thereby realizing the pushing block 21 to push the modified plastic to form.

[0043] refer to Figure 5 and 6 , details the implementation process of scraping multiple forming holes for cleaning:

[0044] A pushing rod 31 is slidably connected to the pushing block 21, and cleaning pipes 32 corresponding to the multiple forming holes 13 are fixedly connected to the pushing rod 31. When the pushing block 21 slides to push out the modified plastic, the pushing rod 31 is driven to slide. The pushing rod 31 drives the multiple cleaning pipes 32 to slide. The multiple cleaning pipes 32 extend from the multiple forming holes 13 to scrape out the modified plastics in the multiple forming holes 13 to prevent the modified plastics from remaining, and further prevent the residual modified plastics from solidifying and causing the multiple forming holes 13 to be blocked, making it impossible to process the modified plastics. A pushing cylinder I is fixedly connected to the pushing block 21, and the cylinder rod of the pushing cylinder I is fixedly connected to the pushing rod 31. The pushing cylinder I drives the pushing rod 31 to slide, thereby realizing the cleaning of the multiple forming holes 13 by the multiple cleaning pipes 32.

[0045] refer to Figure 7 , detailing the implementation process of mixed modified plastics:

[0046] A lifting plate 51 is correspondingly provided on the mixing barrel 12, and a plurality of mixing racks 52 are rotatably connected to the lifting plate 51. The plurality of mixing racks 52 are respectively fixedly connected to the output shafts of a plurality of reduction motors II. When the plurality of reduction motors II are started, the plurality of reduction motors II drive the plurality of mixing racks 52 to rotate, and the plurality of mixing racks 52 fully mix the modified plastics.

[0047] refer to Figure 7 and 8 , detailed description of the implementation process of the lifting of the parts of mixed modified plastics to mix the modified plastics at different positions:

[0048] An inner barrel 61 is fixedly connected to the mixing barrel 12. The position settings of the mixing barrel 12 and the inner barrel 61 can more fully distribute the modified plastics, make mixing faster, and prevent the modified plastic raw materials from being too concentrated, which makes mixing difficult. A lifting rod 62 is rotatably connected to the inner barrel 61. The lifting rod 62 and the lifting plate 51 are driven by threads. The lifting rod 62 is fixedly connected to the output shaft of the reduction motor III. The reduction motor III is fixedly connected to the inner barrel 61. The lifting rod 62 is driven to rotate by starting the reduction motor III. The lifting rod 62 drives the lifting plate 51 to rise and fall under the limit of the inner barrel 61 through threads. The lifting plate 51 drives multiple mixing racks 52 to rise and fall, thereby mixing modified plastics at different positions.

[0049] refer to Figure 8 , 9 , 10 and 11, detailing the implementation process of modified plastics and reverse mixing from different directions:

[0050] A plurality of arc-shaped plates 14 are fixedly connected to the inner wall of the mixing barrel 12. When the plurality of mixing frames 52 rotate, the modified plastics are mixed and made to flow on the circumference, and then the modified plastics are fully mixed through the flow diversion of the plurality of arc-shaped plates 14. A plurality of limit plates 63 are fixedly connected to the inner wall of the inner barrel 61. The plurality of limit plates 63 are divided into an upper and a lower part. A special-shaped plate 81 is rotatably connected between the plurality of limit plates 63 in the upper and lower parts. The special-shaped plate 81 is fixedly connected to the lifting rod 62. When the lifting rod 62 rotates, the special-shaped plate 81 is driven to rotate. A plurality of telescopic rods 72 are fixedly connected to the inner wall of the inner barrel 61. The plurality of telescopic rods 72 are fixedly connected to the arc-shaped frames 71. The plurality of arc-shaped frames 71 are fixedly connected to the reduction motor IV. The output shafts of the plurality of reduction motors IV are fixedly connected to the push rods 73. The plurality of push rods 73 are slidably connected to the inner barrel On the inner wall of 61, multiple push rods 73 are fixedly connected with spring plates 74, and the other ends of multiple spring plates 74 are rotatably connected with rotating blocks. When the special-shaped plate 81 rotates, the multiple arc frames 71 are pushed to slide, and the multiple arc frames 71 drive the multiple reduction motors IV and the multiple push rods 73 to slide. The multiple push rods 73 push the multiple spring plates 74, and the other ends of the multiple spring plates 74 are pressed against the multiple arc plates 14 to bend, and then the multiple reduction motors IV drive the multiple push rods 73 to rotate, and the multiple push rods 73 drive the multiple bent spring plates 74 to rotate, so as to achieve the mixing of the modified plastics in the up and down directions, and then achieve the complete mixing of the modified plastics. The rotation of the multiple mixing frames 52 pushes the modified plastics and the rotation of the multiple spring plates 74 accelerates the mixing flow rate of the modified plastics and enhances the mixing effect of the modified plastics.

Claims

1. A process for preparing modified plastics, characterized in that: The process includes the following steps: Step 1: Prepare the plastic raw materials and melt them; Step 2: Prepare additives that change the properties of plastics and melt them; Step 3: Mix the materials in step 1 and step 2 thoroughly; Step 4: discharging the modified plastic mixed in step 3 and extruding, granulating, cooling and collecting; a modified plastic preparation device is also used, the device comprising a mixing barrel (12) for mixing and preparing plastics, an extrusion tube (11) fixedly connected to the lower end of the mixing barrel (12), a plurality of forming holes (13) arranged at the end of the extrusion tube (11), and a pushing block (21) sliding on the extrusion tube (11), and also comprising a threaded rod (22) fixedly connected to the pushing block (21), and a threaded drive The invention relates to a screw gear (41) on which the screw rod (22) slides, the screw gear (41) rotates on the extrusion tube (11), a push rod (31) sliding on the push block (21), and a cleaning tube (32) fixedly connected to the push rod (31) and corresponding to the plurality of forming holes (13), a lifting plate (51) arranged on the mixing barrel (12), and a plurality of mixing racks (52) rotating on the lifting plate (51), an inner barrel (61) fixedly connected to the mixing barrel (12), and a plurality of mixing racks (52) rotating on the lifting plate (51). The lifting rod (62) on the inner barrel (61) is driven by a thread. A plurality of limit plates (63) are fixedly connected to the inner wall of the inner barrel (61). The plurality of limit plates (63) are divided into an upper and a lower part. A special-shaped plate (81) is rotatably connected between the plurality of limit plates (63) in the upper and lower parts. The special-shaped plate (81) is fixedly connected to the lifting rod (62). When the lifting rod (62) rotates, the special-shaped plate (81) is driven to rotate. A plurality of telescopic plates are fixedly connected to the inner wall of the inner barrel (61). Rod (72), multiple telescopic rods (72) are fixedly connected to an arc frame (71), multiple arc frames (71) are fixedly connected to a reduction motor IV, multiple output shafts of the reduction motor IV are fixedly connected to a push rod (73), multiple push rods (73) are slidably connected to the inner wall of the inner barrel (61), multiple push rods (73) are fixedly connected to a spring plate (74), and the other ends of the multiple spring plates (74) are rotatably connected to a rotating block, and the mixing time in step three is 35-40 minutes.

2. The modified plastic preparation process according to claim 1, characterized in that: In the step three, the weight ratio of the plastic raw material to the additive is 7:

3.

3. The modified plastic preparation process according to claim 1, characterized in that: The mixing temperature in step 3 is 60°C.

4. The modified plastic produced by the modified plastic preparation process according to claim 1 is characterized in that: The weight proportions of the components of the plastic are: 70 parts of polystyrene; 3 parts of glass fiber; 4 parts of mica; 2 parts of matting agent; 2 parts of antioxidant; 2 parts of flame retardant; and 2 parts of plasticizer.

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