Screw extruder for producing TPU (thermoplastic polyurethane) transparent sheets

Abstract

The utility model discloses a TPU (thermoplastic polyurethane) transparent sheet production screw extruder which comprises an extruder main body, a screw, a preheating mechanism and a stirring mechanism, and the screw is arranged on the extruder main body; the preheating mechanism is arranged in the screw rod and is used for heating and drying the raw materials; and the stirring mechanism is arranged on the screw rod and is used for stirring the raw materials. Raw materials in the screw barrel are pushed to move towards the far end of the screw through rotation of the screw, the interior of the mounting pipe is heated through operation of the heating pipe, heat is conveyed outwards through the through holes, the screw is heated, and the conveyed raw materials are dried. And the screw rod drives the stirring block and the convex block to rotate together, and the stirring block and the convex block push the raw materials in the screw rod barrel, so that the raw materials are conveniently diffused, the raw materials are uniformly heated, moisture in the raw materials is reduced, the phenomenon that the sheets have bubbles is reduced, and the production quality of the sheets is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to TPU transparent sheet production field, especially a kind of TPU transparent sheet production screw extruder. BACKGROUND

[0002] Transparent TPU material is a kind of environmental protection material, without plasticizer, antifungal preservative and other harmful chemical substances, harmless to human body and environment, it has high transparency and high elasticity, can be repeatedly stretched without deformation, applicable to the application scene needing elasticity, applicable to various types of clothes, especially lady summer wear and large collar clothes.

[0003] At present, in the production process of transparent TPU material, raw materials are usually added to screw extruder, and the raw materials are hot-melted and extruded by extruder, but due to the influence of moisture factor, the water content in raw materials is high, which causes bubbles in the produced materials and reduces the production quality. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of TPU transparent sheet production screw extruder to solve the problems raised in the above background.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of TPU transparent sheet production screw extruder, including extruder main body;

[0006] Screw, the screw is arranged on extruder main body;

[0007] It further includes preheating mechanism and stirring mechanism, the preheating mechanism is arranged in the inside of screw, and it is used to heat and dry raw materials;

[0008] The stirring mechanism is arranged on screw, and it is used to turn over raw materials.

[0009] Preferably, the preheating mechanism includes:

[0010] Mounting groove, the mounting groove is opened in the middle position of screw, and it is arranged in the form of round hole;

[0011] Mounting pipe, the mounting pipe is inserted into the inner cavity of mounting groove, and its inside is hollow;

[0012] Through hole, the through hole is evenly distributed on the outer wall of mounting pipe.

[0013] Preferably, the preheating mechanism further includes:

[0014] Connecting block, the connecting block is fixedly connected to the middle of one end of mounting pipe, and the connecting block is arranged in the form of cylinder;

[0015] The connecting hole is arranged on the inner wall of one end of the mounting groove, and the inner cavity of the connecting hole is in a penetrating arrangement with the connecting block;

[0016] The heating pipe is fixedly installed in the inner cavity of the mounting pipe, and the heating pipe is arranged in a rectangular array.

[0017] Preferably, the stirring mechanism comprises:

[0018] The threaded groove is arranged on the outer wall of the screw rod, and is used for pushing the raw materials;

[0019] The stirring block is fixedly connected to the inner wall of the threaded groove at two ends, and the stirring block is arranged in an annular array.

[0020] Preferably, the stirring mechanism further comprises:

[0021] The protruding block is fixedly connected to the top of the stirring block at one end, and is used for pushing the raw materials;

[0022] The fixed rod is fixedly connected to the bottom end of the stirring block at the top end, and the fixed rod is arranged in a straight line in a spaced manner.

[0023] Preferably, the other end of the mounting pipe is in a penetrating arrangement with one end of the screw rod, the other end of the mounting pipe is fixedly installed on the extruder body, and the through hole is in communication with the inner cavity of the mounting groove.

[0024] The technical effects and advantages of the present application are as follows:

[0025] The present application utilizes the cooperating arrangement of the screw rod, the mounting pipe, the heating pipe, the through hole, the stirring block and the protruding block, through the rotation of the screw rod, the raw materials inside the screw rod cylinder are pushed to move towards the distal end of the screw rod, and the operation of the heating pipe is utilized to heat and warm the inside of the mounting pipe, the heat is transported outward through the plurality of through holes, the screw rod is heated and warmed, the temperature inside the screw rod cylinder is increased, the raw materials are dried, and the screw rod drives the stirring block and the protruding block to rotate together, the stirring block and the protruding block push the raw materials inside the screw rod cylinder, the raw materials are conveniently diffused, the raw materials are uniformly heated, the raw materials are conveniently dried, the moisture in the raw materials is reduced, the phenomenon of bubbles in the sheet material is reduced, and the production quality of the sheet material is improved. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a whole structure schematic view of the present application.

[0027] Figure 2 It is a structure schematic view of the screw rod of the present application.

[0028] Figure 3 It is a front structure schematic view of the stirring block of the present application.

[0029] Figure 4 It is a front cross-section structure schematic view of the utility model screw.

[0030] Figure 5 It is a front cross-section structure schematic view of the utility model screw. Figure 4 It is an enlarged structure schematic view of the utility model A place.

[0031] Figure 6 It is a front cross-section structure schematic view of the utility model screw.

[0032] In the figure: 1, extruder main body;2, screw;3, preheating mechanism;31, installation groove;32, installation pipe;33, through hole;34, connecting block;35, connecting hole;36, heating pipe;4, stirring mechanism;41, thread groove;42, stirring block;43, protruding block;44, fixed rod. Specific implementation

[0033] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0034] The utility model provides a kind of TPU transparent sheet production screw extruder as shown in Figures 1-6 The utility model provides a kind of TPU transparent sheet production screw extruder as shown in It is a kind of TPU transparent sheet production screw extruder, including extruder main body 1, screw 2, preheating mechanism 3 and stirring mechanism 4, extruder main body 1 is electrically connected with external power supply by external switch, for the production of TPU transparent sheet, by adding the raw material of TPU transparent sheet to the inside of extruder main body 1, heat melting and extrusion forming are carried out to raw material, screw 2 is arranged on extruder main body 1, screw 2 is located inside screw barrel, screw 2 is connected with external motor by coupling, motor is used to drive screw 2 to rotate, raw material in the inside of screw barrel is pushed, by increasing the length-diameter ratio of screw 2, to improve plasticization, the bottom diameter of screw 2 discharge section is increased, to improve compression ratio and plasticization effect, let raw material dry fully, while reducing the rotation speed of screw 2, reduce the temperature of machine body, reduce the generation of bubble;Preheating mechanism 3 is arranged in the inside of screw 2, and it is used to heat and dry raw material, the added raw material is dried by using preheating mechanism 3, to remove the moisture in raw material, reduce the generation of bubble;Stirring mechanism 4 is arranged on screw 2, and it is used to turn raw material, the raw material in the inside of screw barrel is turned by stirring mechanism 4, so that it is heated evenly, and it is convenient to dry raw material. Embodiment

[0035] The preheating mechanism 3 comprises a mounting groove 31, which is provided in the middle of the screw rod 2 in a circular hole shape, and is used for accommodating a mounting pipe 32; the mounting pipe 32 is inserted into the inner cavity of the mounting groove 31, and is hollow inside, both ends of the mounting pipe 32 are closed, and are used for mounting and fixing a heating pipe 36; a plurality of through holes 33 are uniformly provided on the outer wall of the mounting pipe 32, and heat in the inner cavity of the mounting pipe 32 is transported outward through the through holes 33 to heat and warm the screw rod 2; a connecting block 34 is fixedly connected to the middle of one end of the mounting pipe 32, and is provided in a cylindrical shape, and is used for connecting the mounting pipe 32 and the screw rod 2; a connecting hole 35 is provided on the inner wall of one end of the mounting groove 31, and is inserted into the connecting block 34, and is provided in a circular hole shape, the connecting pipe 32 is rotatably connected to the screw rod 2 by inserting the connecting block 34 of one end of the mounting pipe 32 into the inner cavity of the connecting hole 35, and the screw rod 2 does not rotate together with the mounting pipe 32 in the rotating process, so as to ensure the stability of the mounting pipe 32; the heating pipe 36 is fixedly mounted in the inner cavity of the mounting pipe 32, and is provided in a rectangular array, and is electrically connected to an external power supply through a second switch, the screw rod 2 and the screw rod cylinder are warmed by the heating pipe 36, so as to dry the raw materials in the screw rod cylinder, the raw materials in the screw rod cylinder are moved to the far end of the screw rod 2 by the rotation of the screw rod 2, the inner cavity of the mounting pipe 32 is heated and warmed by the operation of the heating pipe 36, heat is transported outward through the through holes 33 to heat and warm the screw rod 2, the temperature in the screw rod cylinder is increased, the raw materials are dried, and the moisture in the raw materials is reduced. Embodiment

[0036] On the basis of the first embodiment, the stirring mechanism 4 comprises a screw groove 41, which is arranged on the outer wall of the screw rod 2 and used for pushing the raw materials; when the raw materials are added into the screw rod barrel, the raw materials at the position of the screw groove 41 are pushed by the screw groove 41 with the rotation of the screw rod 2; a stirring block 42, two ends of which are fixedly connected to the inner wall of the screw groove 41, the stirring block 42 is arranged in an annular array, and the stirring block 42 rotates together with the screw rod 2 to stir the raw materials in the screw rod barrel; a protruding block 43, one end of which is fixedly connected to the top of the stirring block 42 and used for pushing the raw materials, the protruding block 43 and the stirring block 42 form an L-shaped structure, and the protruding block 43 rotates together with the stirring block 42 with the rotation of the screw rod 2 to push the raw materials; and a fixed rod 44, a top end of which is fixedly connected to the bottom end of the stirring block 42, the fixed rods 44 are arranged in a straight line at intervals, the raw materials pass through the gaps between adjacent fixed rods 44, and the fixed rods 44 rotate together with the stirring block 42 to stir the raw materials. The stirring block 42 and the protruding block 43 are pushed by the screw rod 2 to rotate together with the stirring block 42 and the protruding block 43, which facilitates the diffusion of the raw materials, and the fixed rods 44 move together with the stirring block 42 to stir the raw materials, so that the raw materials are evenly heated, the raw materials are conveniently dried, the other end of the mounting pipe 32 is arranged in a penetrating manner with one end of the screw rod 2, the other end of the mounting pipe 32 is fixedly mounted on the extruder main body 1, and the through hole 33 is in communication with the inner cavity of the mounting groove 31.

[0037] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the foregoing detailed description of the present application, for the person skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement, within the spirit and principles of the present application, any modification, equivalent replacement, improvement, etc., should be included in the scope of protection of the present application.

Claims

1. A TPU transparent sheet production screw extruder, comprising: an extruder body (1); a screw (2) arranged on the extruder body (1); characterized in that it further comprises a preheating mechanism (3) arranged inside the screw (2) for heating and drying the raw materials, and a stirring mechanism (4) arranged on the screw (2) for stirring the raw materials. The preheating mechanism (3) comprises:

2. A TPU transparent sheet production screw extruder according to claim 1, characterized in that, a mounting groove (31) arranged in the middle of the screw (2) in a circular hole shape; a mounting pipe (32) arranged in the inner cavity of the mounting groove (31) in a hollow shape; through holes (33) evenly arranged on the outer wall of the mounting pipe (32). The preheating mechanism (3) further comprises:

3. A TPU transparent sheet production screw extruder according to claim 2, characterized in that, a connecting block (34) fixedly connected to the middle of one end of the mounting pipe (32) in a cylindrical shape; a connecting hole (35) arranged on the inner wall of one end of the mounting groove (31) in a penetrating arrangement with the connecting block (34); a heating pipe (36) fixedly installed in the inner cavity of the mounting pipe (32) in a rectangular array. The stirring mechanism (4) comprises:

4. A TPU transparent sheet production screw extruder according to claim 1, characterized in that, a threaded groove (41) arranged on the outer wall of the screw (2) for pushing the raw materials; a stirring block (42) fixedly connected to the inner wall of the threaded groove (41) at both ends in an annular array. The stirring mechanism (4) further comprises:

5. A TPU transparent sheet production screw extruder according to claim 4, characterized in that, a protruding block (43) fixedly connected to the top of the stirring block (42) at one end for pushing the raw materials; a fixed rod (44) fixedly connected to the bottom end of the stirring block (42) at the top end in a linear arrangement. The other end of the mounting pipe (32) is in a penetrating arrangement with one end of the screw (2), and the other end of the mounting pipe (32) is fixedly installed on the extruder body (1), and the through holes (33) are in communication with the inner cavity of the mounting groove (31).

6. A TPU transparent sheet production screw extruder according to claim 2, characterized in that, ​

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