A screw heating device and an injection molding machine

Abstract

This utility model relates to the field of injection molding machine technology, specifically a screw heating device and an injection molding machine. The mechanism includes a protective box, a mounting base, a rotating base, and a feeding rod. One end of the protective box has an installation port. The mounting base is detachably installed inside the protective box, and a heating element is detachably installed inside the mounting base. The rotating base is sleeved on the outside of the mounting base and is driven to rotate by a driving component installed at the bottom of the protective box. The feeding rod has an installation cavity inside, and the end of the heating element furthest from the mounting base is inserted into the installation cavity. Spiral feeding blades are installed on the outer circumference of the feeding rod, and the feeding rod is located inside the injection molding machine body. This utility model, by setting a heating element inside the feeding rod, facilitates cooperation with the heating mechanism outside the barrel to uniformly heat the plastic particles inside the barrel until they melt, improving injection molding efficiency. Furthermore, the heating element and the feeding rod, as well as the feeding rod and the barrel, are detachable, facilitating disassembly and maintenance, and providing convenience for use.

Description

Technical Field

[0001] This utility model relates to the field of injection molding machine technology, specifically to a screw heating device and an injection molding machine. Background Technology

[0002] Injection molding machines, also known as injection molding machines or injection machines, are the main molding equipment used to produce various shapes of plastic products from thermoplastic or thermosetting plastics using plastic molds. The plasticizing unit of a screw-type injection molding machine mainly consists of a feeding device, barrel, screw, glue application assembly, and nozzle.

[0003] Chinese Patent No. CN221112741U discloses a heating device for an injection molding machine barrel and an injection molding machine, belonging to the field of injection molding machine mechanical technology. It includes a heating element and a mounting element. The mounting element is located inside the barrel and has a discharge channel that connects to the material passage channel and the barrel's discharge port. The advantages are that the heating element is located inside the barrel, which blocks the heat emitted by the heating element, reducing heat loss, effectively improving heating efficiency, increasing material liquefaction speed, and reducing blockages caused by slow heating. A material passage channel is formed between the heating element and the inner wall of the barrel, so the heating element only needs to heat the material within the passage channel, ensuring uniform heating of the delivered material.

[0004] However, the above-mentioned disclosed solutions have the following shortcomings: The above-mentioned injection molding machine places the heating element inside the barrel. Although this can reduce heat loss, the plastic particles near the inner wall of the barrel and away from the heating element are heated unevenly and cannot be fully melted, which can easily cause material blockage and affect injection molding efficiency. Utility Model Content

[0005] The purpose of this utility model is to address the problems existing in the background technology by proposing a screw heating device and an injection molding machine.

[0006] The technical solution of this utility model is as follows: A screw heating device includes a protective box with an installation port at one end; a mounting base detachably installed inside the protective box, and a heating element detachably installed inside the mounting base; a rotating base with one end rotatably connected to the injection molding machine body, the rotating base being sleeved outside the mounting base and driven to rotate by a driving component installed at the bottom of the protective box; and a feeding rod with an installation cavity inside, the heating element being inserted into the installation cavity at one end away from the mounting base, a spiral feeding blade being installed on the outer circumferential surface of the feeding rod, the feeding rod being connected to the rotating base, and the feeding rod being disposed inside the injection molding machine body.

[0007] Preferably, the rotating seat and the mounting seat are detachably connected. A first connecting seat is installed on the outer wall of the mounting seat, and a second connecting seat is rotatably connected to the rotating seat at the end away from the feeding rod. The second connecting seat and the first connecting seat are connected by bolts.

[0008] Preferably, the driving component consists of a driving gear and a driven gear ring meshing with it. The driving gear is driven to rotate by a motor installed inside the protective box, and the driven gear ring is mounted on a rotating seat.

[0009] Preferably, a door is hinged to the protective box at the end away from the installation port, and a wiring hole for wiring of the heating element is opened on the door.

[0010] Preferably, the outer diameter of the feeding rod gradually increases from the end closer to the rotating seat to the end farther away from the rotating seat.

[0011] This utility model also discloses an injection molding machine, including the screw heating device described above. A sealing cover is detachably installed on the barrel of the injection molding machine body at the end away from the discharge end by bolts. The sealing cover is rotatably connected to the rotating seat, and the feeding rod is rotatably connected to the barrel.

[0012] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial technical effects: This utility model provides a heating element inside the feeding rod, which can cooperate with the heating mechanism outside the barrel to uniformly heat the plastic particles inside the barrel until they melt, thereby improving the injection molding efficiency. In addition, the heating element and the feeding rod, as well as the feeding rod and the barrel, can be detached, which facilitates disassembly and maintenance and brings convenience to use. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the screw heating device of this utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of part A of this utility model;

[0015] Figure 3 This is a perspective view of the injection molding machine according to this utility model;

[0016] Figure 4 This is a schematic diagram of the internal structure of the injection molding machine according to this utility model.

[0017] Reference numerals: 1. Mounting base; 101. Support frame; 102. First connecting base; 103. Rotating base; 104. Mounting groove; 105. Second connecting base; 2. Protective box; 201. Box door; 202. Wire hole; 3. Heating element; 4. Driving element; 5. Injection molding machine body; 501. Barrel; 502. Sealing cover; 6. Feeding rod; 601. Spiral feed blade; 602. Mounting cavity. Detailed Implementation

[0018] Example 1

[0019] like Figure 1 , Figure 2 and Figure 4As shown, the present invention proposes a screw heating device, including a protective box 2, a mounting base 1, a rotating base 103, and a feeding rod 6; the protective box 2 has an installation port at one end; the mounting base 1 is detachably installed inside the protective box 2, and a support frame 101 is sleeved on the outside of the mounting base 1. The support frame 101 is connected to the inner wall of the protective box 2 by bolts. A heating element 3 is detachably installed inside the mounting base 1. The heating element 3 can be set as a heating tube assembly, which is the prior art; one end of the rotating base 103 is rotatably connected to the injection molding machine body 5. The rotating base 103 is sleeved on the outside of the mounting base 1 and is driven to rotate by a driving component 4 installed at the bottom of the inside of the protective box 2; the feeding rod 6 has an installation cavity 602 inside. The end of the heating element 3 away from the mounting base 1 is inserted into the installation cavity 602. A spiral feeding blade 601 is installed on the outer circumferential surface of the feeding rod 6. The feeding rod 6 is connected to the rotating base 103 and is located inside the injection molding machine body 5.

[0020] Furthermore, the rotating seat 103 is detachably connected to the mounting seat 1. A first connecting seat 102 is installed on the outer wall of the mounting seat 1. A second connecting seat 105 is rotatably connected to the rotating seat 103 at the end away from the feeding rod 6. A mounting groove 104 is provided on the rotating seat 103 at the end near the first connecting seat 102. The second connecting seat 105 is rotatably connected to the mounting groove 104 through a bearing. The second connecting seat 105 and the first connecting seat 102 are connected by bolts.

[0021] Furthermore, the drive component 4 consists of a drive gear and a driven gear ring meshing with it. The drive gear is driven to rotate by a motor installed inside the protective box 2. The driven gear ring is installed on the rotating seat 103. The drive gear can be driven to rotate by starting the motor through the controller, which in turn drives the driven gear ring to rotate, thereby driving the rotating seat 103 to rotate. During installation, the other end of the rotating seat 103 is installed on one end of the injection molding machine body 5.

[0022] Furthermore, a door 201 is hinged to the protective box 2 at the end furthest from the mounting opening. The door 201 has a wiring hole 202 for wiring of the heating element 3. The protective box 2 is detachably connected to the base in the injection molding machine body 5 by bolts. The protective box 2 and the door 201 facilitate the protection of the drive component 4, preventing it from being affected by external interference.

[0023] Furthermore, the outer diameter of the feeding rod 6 gradually increases from the end near the rotating seat 103 to the end away from the rotating seat 103. When the feeding rod 6 is placed inside the material cylinder 501, the rotation of the feeding rod 6 can cooperate with the spiral feeding blade 601 to push the internal molten material toward the discharge end of the material cylinder 501, which facilitates material discharge.

[0024] In this embodiment, initially, the sealing cover 502 is connected to the cylinder 501 by bolts, and the driving gear meshes with the driven gear ring. The chamber door 201 is opened, and the mounting base 1 and heating element 3 are inserted into the protective chamber 2, allowing the heating element 3 to pass through the rotating seat 103 and be inserted into the mounting cavity 602. After the first connecting seat 102 and the second connecting seat 105 abut against each other, the first connecting seat 102 and the second connecting seat 105 are connected by bolts. Then, the support frame 101 is fixedly connected to the inner wall of the protective chamber 2 by bolts. The wires of the heating element 3 are routed through the wire hole 202, and the chamber door 201 is closed. The controller activates the heating element 3 to raise its temperature to the set temperature. The heat is transferred to the feeding rod 6 and the spiral feeding blade 601. Since the mounting base 1 is fixed relative to the protective box 2 by the support frame 101, the controller starts the drive component 4 to drive the rotating seat 103 to rotate. The first connecting seat 102 and the second connecting seat 105 ensure that the mounting base 1 will not interfere with the rotation of the rotating seat 103. When the rotating seat 103 rotates, it can drive the feeding rod 6 and the spiral feeding blade 601 to rotate. The heating element 3 is located in the mounting cavity 602 and will not rotate with it. The rotating feeding rod 6 and the spiral feeding blade 601 can heat and melt the plastic particles and transfer them. Moreover, the mounting base 1 is easy to disassemble, which facilitates the maintenance of the heating element 3.

[0025] Example 2

[0026] like Figures 3 to 4 As shown, the present invention proposes an injection molding machine, including the screw heating device described in Embodiment 1. A sealing cover 502 is detachably installed on the barrel 501 of the injection molding machine body 5 at the end away from the discharge end by bolts. The rotating seat 103 is rotatably connected to the sealing cover 502. The barrel 501 is provided through the installation port on the protective box 2. The barrel 501 does not contact the protective box 2. The feeding rod 6 is rotatably connected to the barrel 501. A heating device is provided on the outside of the barrel 501, which is the prior art, for heating the plastic particles inside the barrel 501.

[0027] In this embodiment, the heating mechanism outside the barrel 501 is activated by the controller to heat the barrel 501, and the heating element 3 heats the feeding rod 6, thereby heating the plastic particles inside the barrel 501 from different directions until they melt, improving injection molding efficiency and making the plastic particles more evenly heated. In addition, the sealing cover 502 is detachable from the barrel 501. When the sealing cover 502 is separated from the barrel 501, the feeding rod 6 and the spiral feeding blade 601 can be taken out along the protective box 2 for maintenance, which brings convenience to the use.

[0028] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A screw heating device, characterized in that, include The protective box (2) has an installation port at one end; Mounting base (1), which is detachably installed inside the protective box (2), and heating element (3) is detachably installed inside the mounting base (1); Rotary seat (103), one end of which is rotatably connected to the injection molding machine body (5), the rotating seat (103) is sleeved on the outside of the mounting seat (1) and driven to rotate by the driving component (4) installed at the bottom of the protective box (2); And a feeding rod (6), which has an installation cavity (602) inside. The heating element (3) is inserted into the installation cavity (602) at one end away from the mounting seat (1). A spiral feeding blade (601) is installed on the outer circumference of the feeding rod (6). The feeding rod (6) is connected to the rotating seat (103). The feeding rod (6) is located inside the injection molding machine body (5).

2. A screw heating device according to claim 1, characterized in that The rotating seat (103) is detachably connected to the mounting seat (1). A first connecting seat (102) is installed on the outer wall of the mounting seat (1). A second connecting seat (105) is rotatably connected to the rotating seat (103) at one end away from the feeding rod (6). The second connecting seat (105) and the first connecting seat (102) are connected by bolts.

3. A screw heating device according to claim 2, wherein The drive unit (4) consists of a drive gear and a driven gear ring meshing with it. The drive gear is driven to rotate by a motor installed inside the protective box (2), and the driven gear ring is installed on the rotating seat (103).

4. A screw heating device according to claim 3, wherein A door (201) is hinged to the protective box (2) at the end away from the installation port, and a wire hole (202) for wiring of the heating element (3) is opened on the door (201).

5. A screw heating device according to claim 1, wherein The outer diameter of the feed rod (6) gradually increases from the end near the rotating seat (103) to the end away from the rotating seat (103).

6. An injection molding machine characterized by, The screw heating device includes any one of claims 1 to 5, wherein a sealing cover (502) is detachably installed on the barrel (501) of the injection molding machine body (5) at one end away from the discharge end by bolts, a rotating seat (103) is rotatably connected to the sealing cover (502), and a feeding rod (6) is rotatably connected to the barrel (501).

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