A method for preparing modified plastic and its application

Abstract

The invention relates to the field of plastics, and more specifically to a method for preparing and applying modified plastics, the method comprising the following steps: step one: inserting a snap-fit ​​mold into a molding mold, and injecting to form a hard plastic I; step two: replacing the injection molding material, sliding the snap-fit ​​mold upwards in the molding mold, and injecting to form an elastic layer; step three: replacing the injection molding material, sliding the snap-fit ​​mold upwards in the molding mold, and injecting to form a hard plastic II; an application of the modified plastic, the modified plastic is applied to the field of shock absorption or being subjected to a lateral cross-sectional thrust; a plastic having good strength and a certain shock absorption function can be prepared.

Description

Technical Field

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

[0002] Plastics are high molecular compounds made from monomers through addition polymerization or condensation polymerization. They have a medium deformation resistance, between that of fibers and rubbers, and are composed of synthetic resins and additives such as fillers, plasticizers, stabilizers, lubricants, and colorants. Plastics are widely used in various fields due to their good plasticity. As plastics have a wide range of applications, more and more performance requirements are placed on them. Most of the existing technologies change the properties of plastics by adding certain chemical raw materials. However, there is no plastic in the existing technology that can have good strength and certain shock-absorbing functions. Summary of the invention

[0003] The purpose of the present invention is to provide a method for preparing a modified plastic and its application, which can prepare a plastic having good strength and certain shock-absorbing function.

[0004] The purpose of the present invention is achieved through the following technical solutions:

[0005] A method for preparing a modified plastic, the method comprising the following steps:

[0006] Step 1: insert the snap-fit ​​mold into the forming mold and form hard plastic I by injection molding;

[0007] Step 2: Replace the elastic injection molding material, slide the snap-fit ​​mold upward in the molding mold, and form an elastic layer by injection molding;

[0008] Step 3: Replace the hard injection molding material, slide the snap-fit ​​mold upward in the molding mold, and injection mold to form hard plastic II.

[0009] A modified plastic preparation device, comprising a device bracket, a screw rod is rotatably connected to the device bracket, a power mechanism I is fixedly connected to the device bracket for driving the screw rod to rotate, the power mechanism I is preferably a servo motor, a clamping bracket is slidably connected to the device bracket, the clamping bracket is connected to the screw rod by threads, a plurality of telescopic mechanisms I are fixedly connected to the clamping bracket, and a clamping plate is fixedly connected to the telescopic end of each telescopic mechanism I;

[0010] A forming mold is clamped between the multiple clamping plates;

[0011] A telescopic mechanism II is rotatably connected to one side of the device bracket, a power mechanism II is fixedly connected to the device bracket to drive the telescopic mechanism II to rotate, the power mechanism II is preferably a servo motor, a telescopic mechanism III is fixedly connected to the telescopic end of the telescopic mechanism II, a snap-fit ​​mold is fixedly connected to the telescopic end of the telescopic mechanism III, a snap-fit ​​bottom plate is fixedly connected to the bottom of the snap-fit ​​mold, and an injection molding cylinder is fixedly connected between the snap-fit ​​mold and the snap-fit ​​bottom plate; a cooling pipe is fixedly connected to the snap-fit ​​mold, and an exhaust groove is provided on the side of the snap-fit ​​mold;

[0012] There are multiple rows of rotating ball blocks rotatably connected to the buckled bottom plate, and each row of rotating ball blocks is fixedly connected by a connecting shaft. A power mechanism III for driving the connecting shaft to rotate is fixedly connected to the buckled bottom plate, and the power mechanism III is preferably a servo motor;

[0013] A waterproof housing is fixedly connected to the buckled bottom plate, and the power mechanism III is fixedly connected in the waterproof housing;

[0014] The other side of the device bracket is rotatably connected with a telescopic mechanism IV, and the device bracket is fixedly connected with a power mechanism IV for driving the telescopic mechanism IV to rotate, and the power mechanism IV is preferably a servo motor, and two telescopic mechanisms V are fixedly connected to the telescopic end of the telescopic mechanism IV;

[0015] An injection cylinder is fixedly connected to the telescopic end of each telescopic mechanism V, a discharge cylinder is fixedly connected to each injection cylinder, a spiral shaft is rotatably connected inside each injection cylinder, an extraction pipe is fixedly connected to each injection cylinder, and a telescopic mechanism VI is fixedly connected to each extraction pipe. An extraction plate is fixedly connected to the telescopic end of each telescopic mechanism VI, and the extraction plate is slidably connected in the corresponding extraction pipe.

[0016] A modified plastic comprises a hard plastic I and a hard plastic II, wherein an elastic layer is arranged between the hard plastic I and the hard plastic II, a plurality of grooves I are arranged on the hard plastic I, a plurality of protrusions I are arranged on the elastic layer, and the plurality of protrusions I are respectively located in the plurality of grooves I, a plurality of grooves II are arranged on the elastic layer, a plurality of protrusions II are arranged on the hard plastic II, and the plurality of protrusions II are respectively located in the plurality of grooves II.

[0017] The invention discloses an application of a modified plastic, wherein the modified plastic is applied to the field of shock absorption or a field subjected to a lateral cross-sectional thrust. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0019] Figure 1 It is a schematic diagram of the method for preparing the modified plastic of the present invention;

[0020] Figure 2 It is a schematic diagram of the modified plastic structure of the present invention;

[0021] Figure 3 It is a schematic diagram of the cross-sectional structure of the modified plastic of the present invention;

[0022] Figure 4 It is a schematic structural diagram of a modified plastic preparation device of the present invention;

[0023] Figure 5 It is a cross-sectional structural schematic diagram of a modified plastic preparation device of the present invention;

[0024] Figure 6 It is a schematic diagram of the device support structure of the present invention;

[0025] Figure 7 It is a schematic diagram of the buckle mold structure of the present invention;

[0026] Figure 8 It is a schematic diagram of the buckle mold structure of the present invention;

[0027] Fig. 9 It is a schematic diagram of the cross-sectional structure of the buckle mold of the present invention;

[0028] Fig.10 It is a schematic diagram of the buckled bottom plate structure of the present invention;

[0029] Fig.11 It is a schematic diagram of the buckled bottom plate structure of the present invention;

[0030] Fig.12 It is a schematic diagram of the structure of the rotating ball block of the present invention;

[0031] Fig.13 It is a schematic diagram of the structure of the injection molding cylinder of the present invention;

[0032] Fig.14 It is a schematic diagram of the cross-sectional structure of the injection molding cylinder of the present invention.

[0033] In the figure:

[0034] Hard plastic Ⅰ 10; elastic layer 20; hard plastic Ⅱ 30;

[0035] Device support 41; screw rod 42; clamping support 43; telescopic mechanism I 44; clamping plate 45;

[0036] Forming mold 50;

[0037] Telescopic mechanism II 61; Telescopic mechanism III 62; Snap-fit ​​mold 63; Snap-fit ​​bottom plate 64; Injection cylinder 65; Cooling pipe 66; Exhaust groove 67; Rotating ball block 68; Connecting shaft 69;

[0038] Telescopic mechanism IV 71; telescopic mechanism V 72; injection cylinder 73; discharge cylinder 74; screw shaft 75; extraction pipe 76; telescopic mechanism VI 77; extraction plate 78. DETAILED DESCRIPTION

[0039] The present invention is further described in detail below with reference to the accompanying drawings.

[0040] like Figure 1 As shown, the steps of a method for preparing a modified plastic are described in detail below;

[0041] A method for preparing a modified plastic, comprising the following steps:

[0042] Step 1: insert the fastening mold 63 into the forming mold 50 and form the hard plastic I10 by injection molding;

[0043] Step 2: Replace the elastic injection molding material, slide the fastening mold 63 upward in the molding mold 50, and form the elastic layer 20 by injection molding;

[0044] Step 3: Replace the hard injection molding material, slide the snap-fit ​​mold 63 upward in the molding mold 50, and form the hard plastic II 30 by injection molding.

[0045] The hard injection molding material can be PVC, or other plastic materials with good strength in the prior art, and the elastic injection molding material can be rubber, or other materials with good elasticity in the prior art;

[0046] When in use, the snap-fit ​​mold 63 is inserted into the molding mold 50, and the hard injection molding material is injected between the snap-fit ​​bottom plate 64 and the molding mold 50 to form the hard plastic I10, the snap-fit ​​bottom plate 64 is slid upward, replaced with the elastic injection molding material, and the elastic layer 20 is formed by injection molding, and the snap-fit ​​bottom plate 64 is slid upward, replaced with the hard injection molding material, and the hard plastic II30 is formed by injection molding;

[0047] like Figures 2 to 3 As shown, the structure and application of a modified plastic are described in detail below;

[0048] A modified plastic includes a hard plastic I10 and a hard plastic II30, wherein an elastic layer 20 is disposed between the hard plastic I10 and the hard plastic II30;

[0049] The invention discloses an application of a modified plastic, wherein the modified plastic is applied to the field of shock absorption or a field subjected to a lateral cross-sectional thrust.

[0050] When using, Figure 3 As shown, the hard plastic Ⅰ10 and the hard plastic Ⅱ30 have good hardness, and the elastic layer 20 has good elasticity. Combining the advantages of the physical properties of the hard plastic Ⅰ10, the hard plastic Ⅱ30 and the elastic layer 20, the material as a whole is wear-resistant, has high strength, and can resist impact well, and has a certain shock-absorbing function, and can be used for laying plastic tracks or other fields that require shock absorption;

[0051] Further, in order to ensure the stability of the connection between the hard plastic Ⅰ10 and the elastic layer 20, and to ensure that the elastic layer 20 and the hard plastic Ⅰ10 are not subjected to the effect of lateral thrust, so that the hard plastic Ⅰ10 and the elastic layer 20 are misaligned, a plurality of grooves Ⅰ are provided on the hard plastic Ⅰ10, a plurality of protrusions Ⅰ are provided on the elastic layer 20, and the plurality of protrusions Ⅰ are respectively located in the plurality of grooves Ⅰ, a plurality of grooves Ⅱ are provided on the elastic layer 20, and a plurality of protrusions Ⅱ are provided on the hard plastic Ⅱ30, and the plurality of protrusions Ⅱ are respectively located in the plurality of grooves Ⅱ. The protrusions Ⅰ and Ⅱ increase the connection area, and can also resist the lateral thrust, so as to ensure the stability of the connection between the hard plastic Ⅰ10 and the hard plastic Ⅱ30 and the elastic layer 20, and ensure that the hard plastic Ⅰ10 and the hard plastic Ⅱ30 and the elastic layer 20 are not misaligned;

[0052] like Figures 4 to 14 As shown, the structure and function of a modified plastic preparation device are described in detail below;

[0053] A modified plastic preparation device, comprising a device bracket 41, a screw rod 42 is rotatably connected to the device bracket 41, a power mechanism I is fixedly connected to the device bracket 41 for driving the screw rod 42 to rotate, the power mechanism I is preferably a servo motor, a clamping bracket 43 is slidably connected to the device bracket 41, the clamping bracket 43 is connected to the screw rod 42 by threads, a plurality of telescopic mechanisms I 44 are fixedly connected to the clamping bracket 43, and a clamping plate 45 is fixedly connected to the telescopic end of each telescopic mechanism I 44;

[0054] A forming mold 50 is clamped between the plurality of clamping plates 45;

[0055] A telescopic mechanism II 61 is rotatably connected to one side of the device bracket 41, a power mechanism II for driving the telescopic mechanism II 61 to rotate is fixedly connected to the device bracket 41, and the power mechanism II is preferably a servo motor, a telescopic mechanism III 62 is fixedly connected to the telescopic end of the telescopic mechanism II 61, a snap-fit ​​mold 63 is fixedly connected to the telescopic end of the telescopic mechanism III 62, a snap-fit ​​bottom plate 64 is fixedly connected to the bottom of the snap-fit ​​mold 63, and an injection cylinder 65 is fixedly connected between the snap-fit ​​mold 63 and the snap-fit ​​bottom plate 64; a cooling pipe 66 is fixedly connected to the snap-fit ​​mold 63, and an exhaust groove 67 is provided on the side of the snap-fit ​​mold 63;

[0056] The buckling bottom plate 64 is rotatably connected to a plurality of rows of rotating ball blocks 68, each row of rotating ball blocks 68 is fixedly connected via a connecting shaft 69, and the buckling bottom plate 64 is fixedly connected to a power mechanism III for driving the connecting shaft 69 to rotate, and the power mechanism III is preferably a servo motor;

[0057] The buckle bottom plate 64 is fixedly connected with a waterproof housing, and the power mechanism III is fixedly connected in the waterproof housing;

[0058] The other side of the device bracket 41 is rotatably connected with a telescopic mechanism IV 71, and the device bracket 41 is fixedly connected with a power mechanism IV for driving the telescopic mechanism IV 71 to rotate, and the power mechanism IV is preferably a servo motor, and two telescopic mechanisms V 72 are fixedly connected to the telescopic end of the telescopic mechanism IV 71;

[0059] An injection cylinder 73 is fixedly connected to the telescopic end of each telescopic mechanism V72, a discharge cylinder 74 is fixedly connected to each injection cylinder 73, a screw shaft 75 is rotatably connected inside each injection cylinder 73, an extraction pipe 76 is fixedly connected to each injection cylinder 73, each extraction pipe 76 is fixedly connected to a telescopic mechanism VI77, an extraction plate 78 is fixedly connected to the telescopic end of each telescopic mechanism VI77, and the extraction plate 78 is slidably connected in the corresponding extraction pipe 76.

[0060] When in use, the power mechanism II is started, and the output shaft of the power mechanism II starts to rotate, and the output shaft of the power mechanism II drives the telescopic mechanism II 61 to rotate, and the telescopic mechanism II 61 drives the telescopic mechanism III 62 to move, and the telescopic mechanism III 62 drives the fastening mold 63 to move, and the fastening mold 63 drives the fastening bottom plate 64 to move, and the telescopic mechanism II 61 and the telescopic mechanism III 62 are started. The telescopic mechanism II 61 and the telescopic mechanism III 62 can be hydraulic cylinders or electric push rods, and the telescopic ends of the telescopic mechanism II 61 and the telescopic mechanism III 62 drive the fastening mold 63 to move, and the fastening mold 63 drives the fastening bottom plate 64 to move, and then the fastening mold 63 and the fastening bottom plate 64 are adjusted to move, so that the fastening bottom plate 64 moves to the upper side of the molding mold 50;

[0061] The forming mold 50 is placed between the multiple clamping plates 45 in advance, and the telescopic mechanism I 44 is started. The telescopic mechanism I 44 can be a hydraulic cylinder or an electric push rod. The telescopic end of the telescopic mechanism I 44 drives the clamping plates 45 to move, and the multiple clamping plates 45 move closer to each other. The multiple clamping plates 45 fix and clamp the forming mold 50;

[0062] Insert the snap-fit ​​bottom plate 64 into the molding die 50, start the power mechanism IV, the output shaft of the power mechanism IV starts to rotate, the output shaft of the power mechanism IV drives the telescopic mechanism IV71 to rotate, the telescopic mechanism IV71 drives the telescopic mechanism V72 to rotate, the telescopic mechanism V72 drives the injection cylinder 73 to rotate, so that the injection cylinder 73 storing the hard injection molding raw material moves to the upper side of the injection cylinder 65, start the telescopic mechanism IV71 and the telescopic mechanism V72, the telescopic mechanism IV71 and the telescopic mechanism V72 can be hydraulic cylinders or electric cylinders. The push rod is moved, and the telescopic ends of the telescopic mechanism IV 71 and the telescopic mechanism V 72 drive the injection cylinder 73 to move, so that the injection cylinder 73 is inserted into the injection cylinder 65, and the corresponding screw shaft 75 is driven to rotate. The injection cylinder 65 is fixedly connected with a motor that drives the screw shaft 75 to rotate. The pipeline of the hard injection molding material is pre-connected to the discharge cylinder 74. The rotation of the screw shaft 75 generates a lateral component force, which pushes the hard injection molding material downward to be injected into the injection cylinder 65, and then enters between the molding mold 50 and the buckling bottom plate 64;

[0063] Further, such as Fig.11 As shown, a plurality of rotating ball blocks 68 are rotatably connected to the buckling bottom plate 64, thereby forming a plurality of grooves Ⅰ on the hard plastic Ⅰ10 formed by injection molding;

[0064] The cooling water pipe is connected to the cooling pipe 66 in advance, and the cooling water is passed into the fastening mold 63 through the cooling pipe 66, thereby cooling the fastening bottom plate 64 and further cooling the hard plastic I10;

[0065] Further, after the injection molding is completed, the telescopic mechanism IV71 and the telescopic mechanism II61 are started, so that the buckle mold 63 and the injection cylinder 73 move upward for a distance at the same time. At this time, the lower end of the injection cylinder 73 is still inserted into the injection cylinder 65, and the telescopic mechanism VI77 is started. The telescopic mechanism VI77 can be a hydraulic cylinder or an electric push rod. The telescopic end of the telescopic mechanism VI77 drives the extraction plate 78 to move, and the extraction plate 78 slides in the extraction pipe 76, so that the extraction pipe 76 extracts the hard injection molding material in the injection cylinder 65, ensuring that there is no residual hard injection molding material in the injection cylinder 65, and further ensuring that when the elastic injection molding material is injected, the elastic injection molding material is not affected by the hard injection molding material;

[0066] After the extraction is completed, the power mechanism IV, the telescopic mechanism IV 71 and the telescopic mechanism V 72 are started, and another injection cylinder 73 filled with elastic injection molding raw materials is driven to move to the upper side of the injection cylinder 65, and the injection cylinder 73 is inserted into the injection cylinder 65, and the telescopic mechanism II 61 is started, and the height of the buckled bottom plate 64 is adjusted according to the thickness requirement of the elastic layer 20, and the bottom of the buckled bottom plate 64 is injected for the second time through the injection cylinder 73 to form the elastic layer 20;

[0067] Further, after the injection molding is completed, the telescopic mechanism IV71 and the telescopic mechanism II61 are started, so that the buckle mold 63 and the injection cylinder 73 move upward for a distance at the same time. At this time, the lower end of the injection cylinder 73 is still inserted into the injection cylinder 65, and the telescopic mechanism VI77 is started. The telescopic mechanism VI77 can be a hydraulic cylinder or an electric push rod. The telescopic end of the telescopic mechanism VI77 drives the extraction plate 78 to move, and the extraction plate 78 slides in the extraction pipe 76, so that the extraction pipe 76 extracts the elastic injection molding material in the injection cylinder 65, ensuring that there is no residual elastic injection molding material in the injection cylinder 65, and further ensuring that when the hard injection molding material is injected, the hard injection molding material is not affected by the elastic injection molding material;

[0068] Further, such as Fig.11 As shown, a plurality of rotating ball blocks 68 are rotatably connected to the buckling bottom plate 64, thereby forming a plurality of grooves II on the elastic layer 20 formed by injection molding;

[0069] Then, the injection molding cylinder 73 filled with hard injection molding raw materials is driven to move to the upper side of the injection molding cylinder 65, and the injection molding cylinder 73 is inserted into the injection molding cylinder 65, and the telescopic mechanism II 61 is started to adjust the height of the buckling bottom plate 64 according to the thickness requirement of the hard plastic II 30, and the bottom of the buckling bottom plate 64 is injected for the third time through the injection molding cylinder 73 to form the hard plastic II 30;

[0070] Furthermore, in order to ensure the flatness of the upper surface of the hard plastic II 30, the power mechanism III is started, and the output shaft of the power mechanism III starts to rotate, and the output shaft of the power mechanism III drives the connecting shaft 69 to rotate, and the connecting shaft 69 drives the plurality of rotating ball blocks 68 to rotate, such as Fig.12 As shown, half of the rotating ball block 68 is an arc surface, and the other side is a plane, so that multiple rotating ball blocks 68 rotate together, and the plane of the rotating ball block 68 coincides with the plane of the lower side of the buckled bottom plate 64, thereby ensuring that the upper side of the hard plastic II 30 after injection molding is a plane.

Claims

1. A method for preparing a modified plastic, characterized in that: The method comprises the following steps: Step 1: inserting the snap-fitting mold (63) into the forming mold (50) and injection molding to form the hard plastic I (10); Step 2: replacing the injection molding material, sliding the locking mold (63) upwards in the molding mold (50), and forming the elastic layer (20) by injection molding; Step 3: Replace the injection molding material, slide the snap-fit ​​mold (63) upward in the molding mold (50), and form the hard plastic II (30) by injection molding; The hard plastic I (10) is provided with a plurality of grooves I, the elastic layer (20) is provided with a plurality of protrusions I, the plurality of protrusions I are respectively located in the plurality of grooves I, the elastic layer (20) is provided with a plurality of grooves II, the hard plastic II (30) is provided with a plurality of protrusions II, the plurality of protrusions II are respectively located in the plurality of grooves II; The molding die (50) is clamped between a plurality of clamping plates (45), the plurality of clamping plates (45) are respectively fixedly connected to the telescopic ends of a plurality of telescopic mechanisms I (44), and the plurality of telescopic mechanisms I (44) are all fixedly connected to the clamping bracket (43); The clamping bracket (43) is slidably connected to the device bracket (41), a screw rod (42) is rotatably connected to the device bracket (41), and the clamping bracket (43) is connected to the screw rod (42) by means of threads; A telescopic mechanism II (61) is rotatably connected to one side of the device bracket (41); a power mechanism II for driving the telescopic mechanism II (61) to rotate is fixedly connected to the device bracket (41); a telescopic mechanism III (62) is fixedly connected to the telescopic end of the telescopic mechanism II (61); a snap-fit ​​mold (63) is fixedly connected to the telescopic end of the telescopic mechanism III (62); a snap-fit ​​bottom plate (64) is fixedly connected to the bottom of the snap-fit ​​mold (63); an injection molding cylinder (65) is fixedly connected between the snap-fit ​​mold (63) and the snap-fit ​​bottom plate (64); a cooling pipe (66) is fixedly connected to the snap-fit ​​mold (63); and an exhaust groove (67) is provided on the side of the snap-fit ​​mold (63); The buckling bottom plate (64) is rotatably connected to a plurality of rows of rotating ball blocks (68), each row of rotating ball blocks (68) is fixedly connected via a connecting shaft (69), and a power mechanism III for driving the connecting shaft (69) to rotate is fixedly connected to the buckling bottom plate (64); A plurality of rotating ball blocks (68) are rotatably connected to the buckling bottom plate (64), thereby forming a plurality of grooves I on the hard plastic I (10) formed by injection molding. A plurality of rotating ball blocks (68) are rotatably connected to the buckling bottom plate (64), thereby forming a plurality of grooves II on the elastic layer (20) formed by injection molding. In order to ensure the flatness of the upper surface of the hard plastic II (30), the power mechanism III is started, the output shaft of the power mechanism III starts to rotate, the output shaft of the power mechanism III drives the connecting shaft (69) to rotate, the connecting shaft (69) drives the plurality of rotating ball blocks (68) to rotate, half of the rotating ball block (68) is an arc surface, and the other side is a plane, thereby the plurality of rotating ball blocks (68) rotate together, the plane of the rotating ball block (68) coincides with the plane of the lower side of the buckling bottom plate (64), thereby ensuring that the upper side of the hard plastic II (30) after injection molding is a plane.

2. A method for preparing a modified plastic according to claim 1, characterized in that: The other side of the device bracket (41) is rotatably connected to a telescopic mechanism IV (71), the device bracket (41) is fixedly connected to a power mechanism IV for driving the telescopic mechanism IV (71) to rotate, the telescopic end of the telescopic mechanism IV (71) is fixedly connected to two telescopic mechanisms V (72), the telescopic end of each telescopic mechanism V (72) is fixedly connected to an injection cylinder (73), each injection cylinder (73) is fixedly connected to a discharge cylinder (74), and each injection cylinder (73) is rotatably connected to a spiral shaft (75).

3. A method for preparing a modified plastic according to claim 2, characterized in that: Each injection cylinder (73) is fixedly connected to an extraction pipe (76), each extraction pipe (76) is fixedly connected to a telescopic mechanism VI (77), and the telescopic end of each telescopic mechanism VI (77) is fixedly connected to an extraction plate (78), and the extraction plate (78) is slidably connected in the corresponding extraction pipe (76).

4. Application of the modified plastic prepared by the modified plastic preparation method according to claim 1, characterized in that: The modified plastic is used in the field of shock absorption or lateral cross-sectional thrust.

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