Double-screw efficient injection molding machine

Abstract

The utility model relates to the technical field of injection molding machines, in particular to a double-screw efficient injection molding machine which comprises a base and an extrusion shell, the extrusion shell is fixed on the base, the top of the extrusion shell is connected with a storage box, an extrusion screw and a stirring rod are rotationally connected in the extrusion shell and the storage box respectively, and the stirring rod is connected with the extrusion screw. The base is provided with a driving assembly for driving the extrusion screw rod and the stirring rod to rotate; wherein the extrusion shell is located at the discharge port and detachably connected with an extrusion head through a fixing piece, the pair of extrusion screws rotate to extrude materials, meanwhile, a stirring rod can be driven to rotate through a transmission belt, the materials in the storage box are effectively stirred, and the materials with large viscosity are prevented from being stacked and solidified; and the extrusion head can be rapidly replaced through the fixing piece, the situation that shutdown time is increased due to tedious replacement operation, and machining and production of injection molding parts are affected is prevented, the structure is simple, operation is easy and convenient, and practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding machines, in particular to a twin-screw high-efficiency injection molding machine. Background Art

[0002] A screw injection molding machine is a mechanical device that uses a screw to heat and melt plastic particles and then inject them into a mold to form plastic products. It is one of the most common types of injection molding machines and is widely used in the production of plastic products.

[0003] In order to speed up the production efficiency of plastics, it is necessary to use a twin-screw high-efficiency injection molding machine to operate. For example, the prior art Chinese patent announcement number "CN214926853U" discloses a twin-screw high-efficiency injection molding machine, which includes a base, a barrel and a motor are installed on the base, a feeding hopper is installed on the top surface of one end of the barrel, a feeding bin is provided in the barrel, a spiral rod is provided in the feeding bin, the spiral rod penetrates the side wall of the barrel, a gear is installed on the spiral rod, the spiral rod is connected to a bearing seat, and the end of the barrel is connected to a discharging mechanism that is easy to disassemble. The twin-screw high-efficiency injection molding machine proposed by the utility model can quickly and fully heat the internal plastic particles by providing multiple groups of heating strips and electric heating wires to improve product quality; and a discharging mechanism that is easy to disassemble is provided. After the injection molding is completed and the machine is stopped, the feeding head can be removed for easy cleaning to prevent blockage.

[0004] However, in actual operation, the method of fixing the feeding head by bolt locking the fixing block is not simple enough. When the feeding head is disassembled for cleaning, the difficulty in disassembly will increase the downtime and affect the production efficiency of the product. Utility Model Content

[0005] The utility model aims to solve the above-mentioned shortcoming in the prior art that it is inconvenient to disassemble and clean the feeding head, and proposes a twin-screw high-efficiency injection molding machine.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A twin-screw high-efficiency injection molding machine is designed, comprising a base and an extrusion shell, the extrusion shell is fixed on the base, and a material storage box is connected to the top of the extrusion shell, an extrusion screw and a stirring rod are rotatably connected in the extrusion shell and the storage box respectively, and a driving component for driving the extrusion screw and the stirring rod to rotate is arranged on the base;

[0008] Wherein, the extrusion shell is located at the discharge port and is detachably connected to the extrusion head through a fixing piece.

[0009] Furthermore, the driving assembly includes a motor and a transmission gear. The extrusion screw is provided with a pair, and the shaft ends of the extrusion screws both pass through the extrusion housing and are fixedly installed with the transmission gear. The pair of transmission gears mesh and rotate. The motor is fixedly installed on the base, and the shaft end of the motor is fixedly connected to one end of one of the extrusion screws.

[0010] Furthermore, it also includes a transmission belt. The shaft end of the stirring rod is arranged outside the material storage box, and the transmission belt is arranged between the shaft end and one end of the extrusion screw through a pulley sleeve.

[0011] Furthermore, the fixing part includes a locking part and a locking part. The extrusion shell is recessed inward at the discharge port to form a step part, and the locking part is fixedly installed on both sides of the step part. The end surface of the locking part is provided with a clamping part. The clamping part is a circular structure, and its interior is hollow and penetrates the other side to form an insertion gap.

[0012] Furthermore, a sealing gasket is provided between the extrusion head and the step portion, and a pair of baffles are fixed on the end faces thereof through a bottom plate, the locking member is rotatably connected to the baffle through a connecting rod, a receiving groove is provided on the other side of the baffle, a positioning glass bead is embedded in the inner side surface of the receiving groove, and the connecting rod is provided in the receiving groove and abuts against the positioning glass bead.

[0013] Furthermore, the two opposite sides of the locking member are flat, and the other two sides are arc-shaped to match the inner wall of the clamping portion. The locking member is arranged in the clamping portion through the insertion gap and rotates to abut against the clamping portion.

[0014] The utility model proposes a twin-screw high-efficiency injection molding machine, which has the beneficial effects that: under the driving action of the motor, the utility model can drive a stirring rod to rotate while rotating a pair of extrusion screws to extrude materials through a transmission belt, effectively stirring the materials in the storage box to prevent the accumulation and solidification of materials with high viscosity, and the extrusion head can be quickly replaced through the fixing parts to prevent the increase of downtime due to cumbersome replacement operations and the influence on the processing and production of injection molded parts. The utility model has a simple structure, easy operation and strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 It is a cross-sectional view of the utility model;

[0017] Figure 3 It is a structural schematic diagram of the drive assembly of the utility model;

[0018] Figure 4 This is an enlarged structural diagram of the fixing member of the utility model;

[0019] Figure 5 for Figure 4 Schematic diagram of the enlarged structure of area A.

[0020] In the figure: 1. base; 2. extrusion shell; 21. step portion; 3. storage box; 4. extrusion screw; 5. stirring rod; 6. drive assembly; 61. motor; 62. transmission gear; 63. transmission belt; 7. fixing part; 71. locking part; 72. locking part; 73. clamping part; 8. extrusion head; 81. baffle; 82. connecting rod; 83. receiving groove; 84. positioning glass beads. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] Reference Figure 1-5 A twin-screw high-efficiency injection molding machine comprises a base 1 and an extrusion shell 2, wherein the extrusion shell 2 is fixed on the base 1 and a material storage box 3 is connected to the top thereof, an extrusion screw 4 and a stirring rod 5 are rotatably connected in the extrusion shell 2 and the material storage box 3 respectively, and a driving component 6 for driving the extrusion screw 4 and the stirring rod 5 to rotate is arranged on the base 1;

[0023] The extrusion housing 2 is detachably connected to an extrusion head 8 at the discharge port via a fixing member 7 .

[0024] It should be supplemented that an injection molding device is installed at the other end of the base 1, and the injection molding device includes a mold connected to the extrusion head 8 and is used for injection molding the injection molding material;

[0025] In addition, an electric heating element is provided inside the extrusion housing 2. Since the extrusion head 8 is difficult to be heated, it needs to be disassembled through the fixing member 7 for easy cleaning to prevent the material from solidifying and clogging.

[0026] Furthermore, the driving assembly 6 includes a motor 61 and a transmission gear 62. The extrusion screw 4 is provided with a pair of transmission gears 62, and the shaft ends thereof both pass through the extrusion housing 2 and are fixedly installed with the transmission gears 62. The pair of transmission gears 62 mesh and rotate. The motor 61 is fixedly installed on the base 1, and the shaft end thereof is fixedly connected to one end of one of the extrusion screws 4.

[0027] Furthermore, it also includes a transmission belt 63. The shaft end of the stirring rod 5 is arranged outside the storage box 3, and the transmission belt 63 is arranged between the shaft end and one end of the extrusion screw 4 through a pulley sleeve.

[0028] In specific operations, the motor 61 drives one of the extrusion screws 4 to rotate, and the extrusion screw 4 uses the transmission gear 62 to drive the other extrusion screw 4 to rotate synchronously to inject material. At the same time, the transmission belt 63 is also used to drive the stirring rod 5 to rotate, so as to prevent the material in the storage box 3 from accumulating and solidifying due to high viscosity, and also facilitate the mixing of multiple materials.

[0029] In more detail, the fixing member 7 includes a locking portion 71 and a locking member 72. The extrusion housing 2 is recessed inward at the discharge port to form a step portion 21, and the locking portion 71 is fixedly installed on both sides of the step portion 21. The end surface of the locking portion 71 is provided with a clamping portion 73. The clamping portion 73 is a circular structure, and its interior is hollow and penetrates the other side to form an insertion gap.

[0030] In general, a sealing gasket is provided between the extrusion head 8 and the step portion 21, and a pair of baffles 81 are fixed to the end faces thereof through a bottom plate. The baffle 81 is rotatably connected to the locking member 72 through a connecting rod 82. A receiving groove 83 is provided on the other side of the baffle 81, and a positioning glass bead 84 is embedded in the inner side surface of the receiving groove 83. The connecting rod 82 is disposed in the receiving groove 83 and abuts against the positioning glass bead 84.

[0031] It is worth mentioning that the extrusion head 8 matches the concave groove of the step portion 21 and is fixed by the sealing gasket to improve the sealing performance;

[0032] The connecting rod 82 is in a U-shaped structure, and a handle is fixed on its periphery. Both ends of the connecting rod 82 are bent, and the locking member 72 is fixedly connected between a pair of baffles 81. In this way, the locking member 72 can be driven to rotate by the connecting rod 82.

[0033] Furthermore, the positioning glass bead 84 abuts against the connecting rod 82 , thereby preventing the connecting rod 82 from rotating freely and causing the extrusion head 8 to be accidentally unlocked.

[0034] Finally, the two opposite sides of the locking member 72 are flat, and the other two sides are arc-shaped to match the inner wall of the clamping portion 73. The locking member 72 is disposed in the clamping portion 73 through the insertion gap and rotates to abut against the clamping portion 73.

[0035] In specific operation, the locking member 72 is arc-shaped on one side opposite to the connecting rod 82, and is arranged in the clamping portion 73 through the insertion gap by utilizing the flat characteristics on both sides. Then, the connecting rod 82 drives the locking member 72 to rotate, so that the locking member 72 in the clamping portion 73 utilizes the arc-shaped characteristics on the other two sides to contact with the two inner walls of the clamping portion 73, thereby achieving the purpose of fixing the extrusion head 8.

[0036] Working mode: When the extrusion head 8 is set on the step portion 21, the locking member 72 is set in the clamping portion 73 through the insertion gap by using the flat characteristics of the two sides, and then the connecting rod 82 drives the locking member 72 to rotate, so that the locking member 72 in the clamping portion 73 uses the arc-shaped characteristics of the other two sides to contact the two inner walls of the clamping portion 73, thereby achieving the purpose of fixing the extrusion head 8;

[0037] Afterwards, the motor 61 drives one of the extrusion screws 4 to rotate, and the extrusion screw 4 uses the transmission gear 62 to drive the other extrusion screw 4 to rotate synchronously to inject the material. At the same time, the transmission belt 63 is also used to drive the stirring rod 5 to rotate to prevent the material in the storage box 3 from accumulating and solidifying due to high viscosity, and it is also convenient to mix multiple materials.

[0038] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A twin-screw high-efficiency injection molding machine, comprising a base (1) and an extrusion housing (2), characterized in that: The extrusion shell (2) is fixed on the base (1) and is connected to a material storage box (3) on its top; an extrusion screw (4) and a stirring rod (5) are rotatably connected in the extrusion shell (2) and the material storage box (3) respectively; and a driving assembly (6) for driving the extrusion screw (4) and the stirring rod (5) to rotate is provided on the base (1); Wherein, the extrusion housing (2) is detachably connected to an extrusion head (8) at the discharge port via a fixing member (7).

2. A twin-screw high-efficiency injection molding machine according to claim 1, characterized in that: The driving assembly (6) comprises a motor (61) and a transmission gear (62); the extrusion screw (4) is provided with a pair of transmission gears (62) whose shaft ends both pass through the extrusion housing (2) and are fixedly mounted with the transmission gears (62); the pair of transmission gears (62) mesh and rotate; the motor (61) is fixedly mounted on the base (1), and its shaft end is fixedly connected to one end of one of the extrusion screws (4).

3. A twin-screw high-efficiency injection molding machine according to claim 2, characterized in that: It also includes a transmission belt (63), wherein the shaft end of the stirring rod (5) is arranged outside the material storage box (3), and the transmission belt (63) is arranged between the shaft end and one end of the extrusion screw (4) via a pulley sleeve.

4. A twin-screw high-efficiency injection molding machine according to claim 1, characterized in that: The fixing member (7) comprises a locking portion (71) and a locking member (72); the extrusion housing (2) is recessed inward at the discharge port to form a step portion (21), and the locking portion (71) is fixedly mounted on both sides of the step portion (21); the end surface of the locking portion (71) is provided with a clamping portion (73); the clamping portion (73) is in a circular structure, is hollow inside, and penetrates through the other side to form a plug-in gap.

5. A twin-screw high-efficiency injection molding machine according to claim 4, characterized in that: A sealing gasket is provided between the extrusion head (8) and the step portion (21), and a pair of baffles (81) are fixed to the end surfaces thereof through a bottom plate. The baffles (81) are rotatably connected to the locking member (72) through a connecting rod (82). A receiving groove (83) is provided on the other side of the baffle (81). A positioning glass bead (84) is embedded in the inner side surface of the receiving groove (83). The connecting rod (82) is arranged in the receiving groove (83) and contacts the positioning glass bead (84).

6. A twin-screw high-efficiency injection molding machine according to claim 5, characterized in that: The two opposite sides of the locking member (72) are flat, and the other two sides are arc-shaped to match the inner wall of the clamping portion (73). The locking member (72) is arranged in the clamping portion (73) through the insertion gap and rotates to abut against the clamping portion (73).

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