Molding device and production process for producing modified polypropylene material

Abstract

The invention relates to the technical field of polypropylene particle production, in particular to a forming device for modified polypropylene material production and a production process, the device comprises a rack, air ducts are symmetrically arranged on the two sides of the rack, and the rack is provided with a clamping unit which comprises a plurality of mounting rods movably mounted on the rack. During working, the two pairs of cooling shells get close to form a supporting barrel to support the strip-shaped materials, the air blower blows cold air into the rack through the air duct, the cold air makes contact with the cooling fins on the cooling shells and takes away heat of the strip-shaped materials, the outer sides of the strip-shaped materials are rapidly cooled to form hard shells, and the strip-shaped materials are cooled to be uniform. The cutting knife cuts the strip-shaped material at the cooled hard shell on the strip-shaped material, so that the strip-shaped material is cut into particles, the particle-shaped material falls into the cooling water tank to be further cooled, the material can be cooled without a very long cooling water tank, and the hard shell can separate the cutting knife from the soft part on the inner side of the strip-shaped material, so that the strip-shaped material can be conveniently cut. And adhesion of materials and the cutter is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of polypropylene particle production, and more particularly to a forming device and a production process for the production of modified polypropylene materials. Background Art

[0002] Polypropylene is a plastic variety widely used in industry, which has the advantages of light weight, heat resistance, excellent chemical stability, good electrical insulation, environmental protection and non-toxicity.

[0003] A Chinese published patent, publication number CN115709534A, discloses a polypropylene particle production and forming machine.

[0004] In the prior art including the above patent, polypropylene, as a commonly used raw material in industry, is generally transported and stored in granular form. When producing polypropylene particles, it is necessary to first melt the polypropylene and extrude it into strips, and then cool and solidify the strip-shaped material to form a polypropylene long strip, and then cut the polypropylene long strip into granular form. However, the strip-shaped material requires a very long cooling water tank during cooling, which will occupy a large space in the factory building, and the polypropylene long strip after cooling and solidification is prone to generate debris during cutting, resulting in material waste. Summary of the Invention

[0005] The object of the present invention is to provide a forming device and a production process for the production of modified polypropylene materials, aiming to solve the above problems.

[0006] To achieve the above object, the present invention provides a forming device for the production of modified polypropylene materials, including a frame with air ducts symmetrically arranged on both sides, and the frame is provided with:

[0007] A clamping unit, which includes a plurality of mounting rods movably installed on the frame. Cooling shells are symmetrically rotatably arranged on the mounting rods. Two pairs of cooling shells on the two mounting rods form a support cylinder for clamping the strip-shaped material. First movable claws are symmetrically hinged on the cooling shells. The mounting rods move along a predetermined path to cause the first movable claws to rotate outward from the cooling shells and rotate inward from the cooling shells when the two cooling shells are separated.

[0008] Cutting knives, which are symmetrically and movably installed on the frame and are used to cut the strip-shaped material cooled and solidified by the clamping unit at a predetermined position.

[0009] Preferably, a first guide groove is formed on the frame for guiding the movement of the mounting rods and changing the shape of the clamping unit.

[0010] Preferably, a first top block is arranged on the lower horizontal part of the first guide groove, and the mounting rod is coupled with the first top block to bring the two cooling shells on it closer together.

[0011] Preferably, a second top block is provided on the lower horizontal portion, and the mounting rod is coupled with the second top block to rotate the first movable claw inwardly towards the inside of the cooling shell.

[0012] Preferably, a support rod for supporting the cutting knife is movably provided on the mounting frame, and the support rod reciprocates to move the cutting knife along a predetermined path.

[0013] Preferably, the support rod moves away from the machine frame and moves synchronously with the strip-shaped material to bring the two cutting knives closer together.

[0014] Preferably, second movable claws are symmetrically hinged on the cutting knife. During the process of the two cutting knives approaching each other, the second movable claws first rotate inwardly towards the inside of the cutting knife and then rotate outwardly towards the outside of the cutting knife.

[0015] Preferably, the support rod moves closer to the machine frame to keep the cutting knife away from the axis of the strip-shaped material.

[0016] Preferably, adjacent two clamping units maintain a predetermined distance, and the cutting points of the two cutting knives are located in the middle of the strip-shaped material cooled by the clamping units.

[0017] A production process for modified polypropylene materials, based on the molding device for the production of modified polypropylene materials in the above solution, further includes the following steps:

[0018] S1. The extruder extrudes a strip-shaped material and enters the machine frame. The cooling shell of the clamping unit clamps the strip-shaped material and cools the strip-shaped material.

[0019] S2. The first movable claw rotates outwardly towards the outside of the cooling shell to separate it from the strip-shaped material. When a pair of cooling shells move away from each other, the first movable claw on it rotates inwardly towards the inside of the cooling shell to separate the strip-shaped material from the cooling shell.

[0020] S3. The support rod drives the cutting knife to move synchronously with the strip-shaped material and the cutting knife closes to cut it off.

[0021] S4. The second movable claw first rotates inwardly towards the inside of the cutting knife and then rotates outwardly towards the outside of the cutting knife to separate the cut material from the cutting knife.

[0022] In the above technical solution, a forming device and a production process for the production of modified polypropylene materials provided by the present invention have the following beneficial effects: During operation, the extruder extrudes the modified polypropylene material into strips, and the end of the strip-shaped material enters the frame. The mounting rod moves along a predetermined path, and the two pairs of cooling shells on the corresponding mounting rods approach each other to form a support cylinder to support the strip-shaped material. The blower blows cold air into the inside of the frame through the air duct. The cold air contacts the heat dissipation fins on the cooling shell and takes away the heat of the strip-shaped material, causing the outer side of the strip-shaped material to be quickly cooled to form a hard shell. The mounting rod continues to move, and the first movable claw rotates away from the strip-shaped material. The hard outer shell on the strip-shaped material is supported by the cooling shell, and the first movable claw is separated from the strip-shaped material, avoiding adhesion between the cooled strip-shaped material and the first movable claw. The mounting rod continues to move, and the two corresponding mounting rods move away from each other, and the cooling shells on the mounting rods move away from the strip-shaped material, while the first movable claw moves towards the strip-shaped material. The first movable claw pushes against the strip-shaped material, causing the strip-shaped material to separate from the cooling shell. Then, the strip-shaped material with the outer layer cooled and solidified moves to the outside of the frame, and the cutting knife cuts the strip-shaped material at the cooled hard outer shell on the strip-shaped material, causing the strip-shaped material to be cut into granules. The granular material falls into the cooling water tank for further cooling. It is not necessary to have a very long cooling water tank to cool the material, and the hard outer shell can separate the cutting knife from the soft part inside the strip-shaped material, avoiding adhesion between the material and the cutting knife and not generating debris. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0024] Figure 1 The overall structural schematic diagram provided by the embodiment of the present invention;

[0025] Figure 2 The structural schematic diagram of the movable belt provided by the embodiment of the present invention;

[0026] Figure 3 The structural schematic diagram of the movable frame provided by the embodiment of the present invention;

[0027] Figure 4 The internal structural schematic diagram of the frame provided by the embodiment of the present invention;

[0028] Figure 5 The structural schematic diagram of the clamping unit provided by the embodiment of the present invention;

[0029] Figure 6 For Figure 5 The enlarged view at A in

[0030] Figure 7 Schematic structural diagram of the support rod provided by an embodiment of the present invention;

[0031] Figure 8 Schematic structural diagram of the third guide groove provided by an embodiment of the present invention;

[0032] Figure 9 Schematic cross-sectional structural diagram of the cutting knife provided by an embodiment of the present invention;

[0033] Figure 10 Schematic internal structural diagram of the mounting rod provided by an embodiment of the present invention;

[0034] Figure 11 Schematic structural diagram of the first guide groove provided by an embodiment of the present invention;

[0035] Figure 12 Schematic structural diagram of the second guide groove provided by an embodiment of the present invention.

[0036] Explanation of reference numerals:

[0037] 1, frame; 11, clamping unit; 111, mounting rod; 112, cooling shell; 113, first movable claw; 114, first top block; 115, second top block; 116, first cable; 117, second cable; 118, guiding block; 119, support cylinder; 12, cutting knife; 121, second movable claw; 122, connecting rod; 123, gear; 124, support rod; 125, movable frame; 126, first wedge block; 127, second wedge block; 128, third wedge block; 129, fourth wedge block; 13, first guide groove; 131, lower horizontal part; 132, guiding part; 133, inclined groove; 134, movable belt; 135, driving wheel; 136, transmission belt; 137, supporting roller; 138, magnet; 139, first movable piece; 14, air duct; 141, fixed rod; 142, first tenon block; 143, second guide groove; 144, third guide groove; 145, second tenon block; 146, third top block; 147, first slider; 148, second slider; 149, second movable piece. Detailed implementation manners

[0038] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0039] Embodiment 1

[0040] As Figures 1-12 shown, a molding device for the production of modified polypropylene materials includes a frame 1 symmetrically provided with air ducts 14 on both sides, and the frame 1 is provided with:

[0041] The clamping unit 11 includes a plurality of mounting rods 111 movably mounted on the frame 1. Symmetrically rotatably arranged on the mounting rods 111 are cooling shells 112. Two pairs of cooling shells 112 on the two mounting rods 111 form a support cylinder 119 for clamping strip-shaped materials. Symmetrically hinged on the cooling shell 112 are first movable claws 113. The mounting rods 111 move along a predetermined path to cause the first movable claws 113 to rotate outwardly from the cooling shell 112 and rotate inwardly toward the cooling shell 112 when the two cooling shells 112 move away from each other.

[0042] The cutting knife 12 is symmetrically and movably mounted on the frame 1 and is used to cut the strip-shaped material cooled and solidified by the clamping unit 11 at a predetermined position.

[0043] Specifically, heat dissipation fins are provided on the cooling shell 112. The cooling shell 112 is specifically made of a copper alloy with good heat conduction performance. A groove for accommodating the first movable claw 113 is provided on the inner side of the cooling shell 112.

[0044] In the above technical solution, during operation, the extruder extrudes the modified polypropylene material into a strip shape, and the end of the strip-shaped material enters the frame 1. The mounting rods 111 move along a predetermined path, and two pairs of cooling shells 112 on the two corresponding mounting rods 111 approach each other to form a support cylinder 119 to support the strip-shaped material. And the blower blows cold air into the interior of the frame 1 through the air duct 14. The cold air contacts the heat dissipation fins on the cooling shell 112 and takes away the heat of the strip-shaped material, so that a hard shell is quickly formed on the outer side of the strip-shaped material. The mounting rods 111 continue to move, and the first movable claws 113 rotate away from the strip-shaped material. The hard shell on the strip-shaped material is supported by the cooling shell 112, and the first movable claws 113 are separated from the strip-shaped material to avoid adhesion between the cooled strip-shaped material and the first movable claws 113. The mounting rods 111 continue to move, and the two corresponding mounting rods 111 move away from each other, and the cooling shells 112 on the mounting rods 111 move away from the strip-shaped material, while the first movable claws 113 move toward the strip-shaped material. The first movable claws 113 push against the strip-shaped material to separate the strip-shaped material from the cooling shell 112. Then the strip-shaped material with the outer layer cooled and solidified moves to the outside of the frame 1. The cutting knife 12 cuts the strip-shaped material at the cooled hard shell on the strip-shaped material, so that the strip-shaped material is cut into granular form. The granular material falls into the cooling water tank for further cooling. It is not necessary to have a very long cooling water tank to cool the material, and the hard shell can separate the cutting knife 12 from the soft part inside the strip-shaped material, avoiding adhesion between the material and the cutting knife 12 and not generating debris.

[0045] As a further embodiment provided by the present invention, a first guide groove 13 is provided on the frame 1 for guiding the movement of the mounting rods 111 and changing the shape of the clamping unit 11.

[0046] Specifically, the first guide groove 13 includes a lower horizontal portion 131, a guide portion 132 and an inclined groove 133 connecting the lower horizontal portion 131 and the guide portion 132. The mounting rod 111 is provided with a guide block 118 extending into the first guide groove 13. The guide block 118 is provided with a slope adapted to the inclined groove 133. The frame 1 is provided with a movable belt 134 engaged with the first guide groove 13. The guide block 118 is rotatably installed on the movable belt 134. The frame 1 is rotatably provided with a driving wheel 135 for driving the movable belt 134 to move.

[0047] Furthermore, during operation, the driving wheel 135 drives the movable belt 134 to move, and the movable belt 134 drives the guide block 118 and the mounting rod 111 to move along the left side of the first guide groove 13 (with Figure 11 The inclined slot 133 of the strip material is moved, the two corresponding mounting rods 111 are brought together, the cooling shells 112 on the mounting rods 111 are also brought together to form a support cylinder 119, and the guide block 118 enters the lower horizontal portion 131. In this process, the cooling shell 112 cools the strip material, so that the outer side of the strip material is cooled to form a hard shell, and the support cylinder 119 clamps the strip material and lifts the strip material to keep it horizontal. The movable belt 134 continues to move and causes the guide block 118 to enter the right side (with Figure 11 The guide block 118 moves along the inclined groove 133 to separate the corresponding mounting rod 111 and the cooling shell 112, and the strip material after preliminary cooling can leave the frame 1, which is convenient for subsequent cutting work.

[0048] As another embodiment further provided by the present invention, a first top block 114 is disposed on the lower horizontal portion 131 of the first guide groove 13, and the mounting rod 111 is coupled to the first top block 114 to bring the two cooling shells 112 closer together.

[0049] Specifically, a first slider 147 is slidably provided on the guide block 118 , a spring is provided between the first slider 147 and the frame 1 , a first cable 116 is provided between the first slider 147 and the cooling shell 112 , and a torsion spring is provided between the cooling shell 112 and the mounting rod 111 .

[0050] Further, the guide block 118 is provided from the left side (with Figure 11 When the inclined slot 133 of the lower horizontal portion 131 moves to the lower horizontal portion 131, the first top block 114 on the lower horizontal portion 131 is embedded in the guide block 118 and pushes the first slider 147 in the guide block 118 to move, the first slider 147 moves toward the inside of the guide block 118 and the first cable 116 is relaxed, the cooling shell 112 rotates toward the strip material driven by the torsion spring, and the multiple cooling shells 112 are close to form a support cylinder 119; when the guide block 118 moves from the lower horizontal portion 131 to the right (with Figure 11When moving in the chute 133 (as a basis), the first top block 114 is separated from the guide block 118, the first slider 147 moves outward of the guide block 118 under the action of the spring, the first cable 116 is tightened, and the first slider 147 drives the cooling shell 112 to rotate away from the strip material through the first cable 116, so that the cooling shell 112 is separated from the strip material.

[0051] As another embodiment further provided by the present invention, a second top block 115 is arranged on the lower horizontal part 131, and the mounting rod 111 is coupled with the second top block 115 to make the first movable claw 113 rotate inward of the cooling shell 112.

[0052] Specifically, a second slider 148 is slidably arranged on the guide block 118, a spring is arranged between the second slider 148 and the guide block 118, a torsion spring is arranged between the first movable claw 113 and the cooling shell 112, and a second cable 117 passing through the cooling shell 112 is arranged between the second slider 148 and the first movable claw 113. A slope is arranged on the left side of the second top block 115 (as a basis). Figure 11 As a basis).

[0053] Further, during the process of the guide block 118 moving along the lower horizontal part 131, the guide block 118 gradually approaches the second top block 115. The second slider 148 moves along the slope on the second top block 115 to above the second top block 115, the second slider 148 moves into the guide block 118, and the second cable 117 is tightened. The second slider 148 drives the first movable claw 113 to rotate away from the strip material through the second cable 117, and the inner wall of the cooling shell 112 supports the strip material, so that the first movable claw 113 is separated from the strip material. The guide block 118 continues to move, the second slider 148 is separated from the second top block 115, the second slider 148 is reset under the action of the spring, and the first movable claw 113 is reset under the action of the torsion spring. The first movable claw 113 is coaxial with the inner wall of the cooling shell 112; when the guide block 118 moves into the chute 133 on the right side (as a basis) from the lower horizontal part 131, the first top block 114 is separated from the guide block 118, the first slider 147 moves outward of the guide block 118 under the action of the spring, the first cable 116 is tightened, and the first slider 147 drives the cooling shell 112 to rotate away from the strip material through the first cable 116. At this time, the distance between the outer wall of the cooling shell 112 and the mounting rod 111 decreases, the second cable 117 is further relaxed, and the first movable claw 113 continues to rotate towards the strip material under the action of the torsion spring. The first movable claw 113 pushes the strip material to be separated from the cooling shell 112 until it rotates to the limit angle (as shown). Figure 11 As a basis). Figure 6 As shown).

[0054] As another embodiment further provided by the present invention, a support rod 124 for supporting the cutting knife 12 is movably arranged on the mounting frame. The support rod 124 reciprocates to move the cutting knife 12 along a predetermined path. Adjacent two clamping units 11 maintain a predetermined distance, and the cutting points of the two cutting knives 12 are located in the middle of the strip-shaped material cooled by the clamping unit 11.

[0055] Specifically, a movable frame 125 is slidably arranged on the support rod 124. A gear 123 extending to the inner side of the movable frame 125 is rotatably arranged on the frame 1. Teeth meshing with the gear 123 are arranged on the side walls of the two opposite sides of the movable frame 125. A transmission belt 136 is arranged between one of the driving wheels 135 and the gear 123. A belt supporting roller 137 for supporting the transmission belt 136 is arranged on the frame 1. A first wedge block 126 and a second wedge block 127 are respectively arranged on the side walls of the two opposite sides of the movable frame 125. A third wedge block 128 fitting with the first wedge block 126 and a fourth wedge block 129 fitting with the second wedge block 127 are arranged on the frame 1 (as Figure 3 shown), and a magnet 138 for attracting the support rod 124 is arranged on the frame 1.

[0056] Further, during the work, the driving wheel 135 drives the gear 123 to rotate through the transmission belt 136. The gear 123 meshes with the teeth on the lower side of the movable frame 125. The gear 123 drives the movable frame 125 and the support rod 124 to move through the meshing teeth, so that the support rod 124 drives the cutting knife 12 to move synchronously with the strip-shaped material, and the two cutting knives 12 approach each other to cut the strip-shaped material. The position where the cutting knife 12 cuts the strip-shaped material remains unchanged. The position where the cutting knife 12 cuts the strip-shaped material is in the middle of the part of the strip-shaped material cooled by the clamping unit 11, so as to cut off the strip-shaped material by the cutting knife 12; when the cutting work is completed, the second wedge block 127 contacts the fourth wedge block 129 and is pushed by the fourth wedge block 129, and the strip-shaped material provides a certain thrust to the cutting knife 12, so that the second wedge block 127 moves a certain distance along the fourth wedge block 129, so that the gear 123 is separated from the teeth on the lower side of the movable frame 125 and meshes with the teeth on the upper side of the movable frame 125, and the two cutting knives 12 are separated. The gear 123 continues to rotate to drive the support rod 124 and the cutting knife 12 to reset, and the first wedge block 126 gradually approaches the third wedge block 128 and is pushed by the third wedge block 128. The magnet 138 attracts the support rod 124 to make the support rod 124 move a small distance further, so that the gear 123 resumes meshing with the teeth on the lower side of the movable frame 125.

[0057] Furthermore, in the above embodiments, a rubber layer may be provided on the side wall where the movable frame 125 contacts the support rod 124 to limit the movable frame 125 to maintain the meshed state with the gear 123 when not being pushed. Or a locking block may be provided on the support rod 124, and it can be unlocked only when the first wedge block 126 contacts the third wedge block 128 or the second wedge block 127 contacts the fourth wedge block 129. Or it may be other structures that those skilled in the art can obtain according to common technical knowledge.

[0058] As another embodiment further provided by the present invention, the support rod 124 is away from the frame 1 and moves synchronously with the strip material to make the two cutting knives 12 approach each other, and the support rod 124 approaches the frame 1 to keep the cutting knives 12 away from the axis of the strip material.

[0059] Specifically, a fixed rod 141 is provided on the frame 1, a first tenon block 142 for driving the cutting knife 12 to move is provided on the fixed rod 141, a connecting rod 122 extending into the support rod 124 is provided on the cutting knife 12, a second guide groove 143 adapted to the first tenon block 142 is provided on the connecting rod 122. The second guide groove 143 is an obtuse triangle, one short side of the obtuse triangle is parallel to the support rod 124, and a first movable piece 139 is hinged in the corresponding horizontal groove of this side. A second movable piece 149 is hinged in the groove corresponding to the long side of the obtuse triangle. Torsion springs are provided between the second movable piece 149 and the connecting rod 122, and between the first movable piece 139 and the connecting rod 122.

[0060] Furthermore, when the support rod 124 drives the cutting knife 12 to move away from the frame 1, the first tenon block 142 on the fixed rod 141 moves along the long side of the second guide groove 143 and pushes the connecting rod 122 to drive the cutting knife 12 to approach the strip material. The two cutting knives 12 slowly approach each other to cut the strip material, avoiding the too large influence of the rapid movement of the cutting knife 12 on the strip material. And during the movement, the first tenon block 142 pushes the first movable piece 139 to make room for the movement of the first tenon block 142. When the first tenon block 142 moves to the connection of the long side and the short side, the first movable piece 139 rotates under the action of the torsion spring to seal the long side of the second guide groove 143. Then the support rod 124 drives the cutting knife 12 to move towards the frame 1. At this time, the first tenon block 142 moves along the short side of the second inclined groove 133 and drives the cutting knife 12 to quickly approach the support rod 124 to avoid the cutting knife 12 contacting the strip material. The support rod 124 continues to move, the first tenon block 142 enters the horizontal groove and gradually pushes the second movable piece 149 to make room for the movement of the first tenon block 142 until the first tenon block 142 moves to the connection of the horizontal groove and the long side of the second guide groove 143, and the second movable piece 149 is separated from the first tenon block 142. The second movable piece 149 rotates under the drive of the torsion spring to seal the horizontal groove.

[0061] As yet another embodiment further provided by the present invention, second movable claws 121 are symmetrically hinged on the cutting knife 12. During the process of the two cutting knives 12 approaching each other, the second movable claws 121 first rotate towards the inner side of the cutting knife 12 and then rotate towards the outer side of the cutting knife 12.

[0062] Specifically, a torsion spring is provided between the second movable claw 121 and the cutting knife 12. A third top block 146 for pushing the two second movable claws 121 is arranged inside the cutting knife 12. A third guide groove 144 for guiding the movement of the third top block 146 is arranged on the support rod 124. The third guide groove 144 includes a vertical groove perpendicular to the support rod 124 and a wavy guide groove. A second tenon block 145 adapted to the third guide groove 144 is arranged on the third top block 146.

[0063] Further, during the process of the two cutting knives 12 approaching the strip-shaped material, the second tenon block 145 moves along the vertical groove, and the two second movable claws 121 on the cutting knife 12 are flush with the side wall of the cutting knife 12. As the cutting knife 12 continues to move, the second tenon block 145 enters the wavy guide groove and pushes the third top block 146 to move left and right (based on...). When the third top block 146 pushes the left second movable claw 121, the left second movable claw 121 pushes the cutting surface of the strip-shaped material, separating the strip-shaped material from the side wall of the cutting knife 12. The second movable claw 121 on the opposite side rotates towards the inside of the cutting knife 12 under the action of the torsion spring, separating the second movable claw 121 from the material, and vice versa, thereby reducing the contact between the cutting knife 12 and the material. And when the two cutting knives 12 separate, the third top block 146 moves repeatedly, so that the second movable claw 121 pushes the cut material, separating it from the cutting knife 12 and falling into the cooling pool. Figure 9 For example, when the third top block 146 pushes the left second movable claw 121, the left second movable claw 121 pushes the cutting surface of the strip-shaped material, separating the strip-shaped material from the side wall of the cutting knife 12. The second movable claw 121 on the opposite side rotates towards the inside of the cutting knife 12 under the action of the torsion spring, separating the second movable claw 121 from the material, and vice versa, thereby reducing the contact between the cutting knife 12 and the material. And when the two cutting knives 12 separate, the third top block 146 moves repeatedly, so that the second movable claw 121 pushes the cut material, separating it from the cutting knife 12 and falling into the cooling pool.

[0064] Embodiment 2

[0065] A production process for a modified polypropylene material, which is based on the forming device for producing a modified polypropylene material in Embodiment 1 and further includes the following steps:

[0066] S1. The extruder extrudes a strip-shaped material and enters the frame 1. The cooling shell 112 of the clamping unit 11 clamps the strip-shaped material. The blower blows cold air into the inside of the frame 1 through the air duct 14. The cold air contacts the heat dissipation fins on the cooling shell 112 and takes away the heat of the strip-shaped material, so that a hard shell is quickly formed on the outer side of the strip-shaped material.

[0067] S2. The first movable claw 113 rotates towards the outside of the cooling shell 112 to separate it from the strip-shaped material. When a pair of cooling shells 112 move away from each other, the first movable claws 113 on them rotate towards the inside of the cooling shell 112 to separate the strip-shaped material from the cooling shell 112.

[0068] S3. The support rod 124 drives the cutting knife 12 to move synchronously with the strip-shaped material, and the two cutting knives 12 approach each other to cut the strip-shaped material. The position where the cutting knife 12 cuts the strip-shaped material remains unchanged, and the position where the cutting knife 12 cuts the strip-shaped material is at the middle of the part of the strip-shaped material cooled by the clamping unit 11.

[0069] S4. During the process of the two cutting knives 12 approaching the strip-shaped material, the second tenon block 145 moves along the vertical groove, and the two second movable claws 121 on the cutting knife 12 are flush with the side wall of the cutting knife 12. The cutting knife 12 continues to move, the second tenon block 145 enters the wavy guide groove, and pushes the third top block 146 to move left and right (based on...). When the third top block 146 pushes the second movable claw 121 on the left side, the second movable claw 121 on the left side pushes the cutting surface of the strip-shaped material, so that the strip-shaped material is separated from the side wall of the cutting knife 12. The second movable claw 121 on the opposite side rotates towards the inside of the cutting knife 12 under the action of the torsion spring, so that the second movable claw 121 is separated from the material, and vice versa, thereby reducing the contact between the cutting knife 12 and the material. When the two cutting knives 12 separate, the third top block 146 moves repeatedly, so that the second movable claw 121 pushes the cut material, so that it is separated from the cutting knife 12 and falls into the cooling pool. Figure 9 The above only describes some exemplary embodiments of the present invention by way of illustration. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

[0070] The above only describes some exemplary embodiments of the present invention by way of illustration. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A molding device for producing modified polypropylene material, characterized in that: The invention comprises a frame (1) with air ducts (14) symmetrically arranged on both sides, wherein the frame (1) is provided with: A clamping unit (11), comprising a plurality of mounting rods (111) movably mounted on the frame (1), a cooling shell (112) being symmetrically rotatably arranged on the mounting rods (111), two pairs of cooling shells (112) on two mounting rods (111) forming a support cylinder (119) for clamping a strip material, a first movable claw (113) being symmetrically hinged on the cooling shell (112), the mounting rod (111) moving along a predetermined path so that the first movable claw (113) rotates toward the outside of the cooling shell (112), and rotates toward the inside of the cooling shell (112) when the two cooling shells (112) are away from each other; A cutting knife (12) is symmetrically and movably mounted on the frame (1) and is used to cut the strip material cooled and solidified by the clamping unit (11) at a predetermined position.

2. A molding device for producing modified polypropylene material according to claim 1, characterized in that: The frame (1) is provided with a first guide groove (13) for guiding the installation rod (111) to move and change the shape of the clamping unit (11).

3. A molding device for producing modified polypropylene material according to claim 2, characterized in that: A first top block (114) is arranged on the lower horizontal portion (131) of the first guide groove (13), and the mounting rod (111) is coupled to the first top block (114) so ​​that the two cooling shells (112) thereon are brought close together.

4. A molding device for producing modified polypropylene material according to claim 3, characterized in that: A second top block (115) is disposed on the lower horizontal portion (131), and the mounting rod (111) is coupled to the second top block (115) so that the first movable claw (113) rotates toward the inside of the cooling shell (112).

5. A molding device for producing modified polypropylene material according to claim 1, characterized in that: A support rod (124) for supporting the cutting knife (12) is movably arranged on the mounting frame, and the support rod (124) reciprocates to enable the cutting knife (12) to move along a predetermined path.

6. A molding device for producing modified polypropylene material according to claim 5, characterized in that: The support rod (124) is away from the frame (1) and moves synchronously with the strip material to bring the two cutting knives (12) closer together.

7. A molding device for producing modified polypropylene material according to claim 5, characterized in that: A second movable claw (121) is symmetrically hinged on the cutting knife (12). When the two cutting knives (12) are brought closer together, the second movable claw (121) first rotates toward the inside of the cutting knife (12) and then rotates toward the outside of the cutting knife (12).

8. A molding device for producing modified polypropylene material according to claim 5, characterized in that: The support rod (124) moves closer to the frame (1) so that the cutting knife (12) remains away from the axis of the strip material.

9. A molding device for producing modified polypropylene material according to claim 1, characterized in that: Two adjacent clamping units (11) maintain a predetermined distance and the cutting points of the two cutting knives (12) are located in the middle of the strip material cooled by the clamping units (11).

10. A production process for modified polypropylene material, which is based on the molding device for modified polypropylene material production according to any one of claims 1 to 9, characterized in that: The following steps are also included: S1, the extruder extrude the strip material and the strip material enters the frame (1), and the cooling shell (112) of the clamping unit (11) clamps the strip material and cools the strip material; S2, the first movable claw (113) rotates toward the outside of the cooling shell (112) to separate it from the strip material, and when the pair of cooling shells (112) move away from each other, the first movable claw (113) thereon rotates toward the inside of the cooling shell (112) to separate the strip material from the cooling shell (112); S3, the support rod (124) drives the cutting knife (12) to move synchronously with the strip material, and the cutting knife (12) moves closer to cut it; S4, the second movable claw (121) first rotates toward the inside of the cutting knife (12) and then rotates toward the outside of the cutting knife (12) to separate the cut material from the cutting knife (12).

Images