Cylinder heater of screw-type extruder

Abstract

The utility model discloses a screw extruder barrel heater which comprises two heat conducting plates and a heating rod, the cross section of each heat conducting plate is in a semicircular ring shape, and the heat conducting plates are symmetrically arranged on the outer side of a barrel in a sleeving mode. Two opposite side edges of the two heat conducting plates are detachably connected; a plurality of inserting grooves are formed in the semicircular side face of the heat conduction plate, inserting blocks matched with the inserting grooves are arranged on the outer side of the heating rod, and the inserting blocks are arranged in the inserting grooves. According to the barrel heater of the screw-type extruder, heating equipment is mounted on the outer side of the barrel in a coating manner, so that the barrel heater is convenient to disassemble, assemble and overhaul.

Description

Technical Field

[0001] This utility model relates to the field of extruder equipment, and in particular to a screw extruder barrel heater. Background Technology

[0002] During the extrusion process, the inside of the barrel needs to be heated and cooled. Conventional barrel heating is done by embedding heating equipment, which is inconvenient for disassembly and maintenance. Utility Model Content

[0003] To address the aforementioned issues, this utility model provides a screw extruder barrel heater, in which the heating device is installed on the outside of the barrel in a covered manner, facilitating disassembly and maintenance.

[0004] The technical solution of this utility model is as follows:

[0005] A screw extruder barrel heater includes a heat-conducting plate and a heating rod. The heat-conducting plate comprises two pieces with a semi-circular cross-section, symmetrically sleeved on the outside of the barrel. The two heat-conducting plates are detachably connected on opposite sides. Multiple slots are provided on the semi-circular side of the heat-conducting plate, and the heating rod has a matching slot insert on its outer side, the insert being disposed within the slot.

[0006] In a further technical solution, connecting strips are provided on opposite sides of the two heat-conducting plates, and multiple screw holes are provided on the connecting strips. The two opposite connecting strips are connected by screw bolts.

[0007] In a further technical solution, the insert block is provided with a connecting groove for accommodating a heating rod, and the heating rod is inserted into the connecting groove.

[0008] In a further technical solution, the side of the insert block facing the barrel is connected to the connecting groove.

[0009] In a further technical solution, the slots are respectively opened on opposite sides of the heat-conducting plate, and two slots on the same side of the heat-conducting plate are spaced apart to leave space for the other side of the heat-conducting plate. The slots on opposite sides are alternately arranged.

[0010] In a further technical solution, a locking element is provided at the slot corresponding to the outer side of the heat-conducting plate.

[0011] In a further technical solution, the locking component includes a locking block and a torsion spring. The slot opening is provided with an installation port on the side away from the barrel. One side of the locking block is hinged to the side of the installation port away from the slot opening. The torsion spring is located at the hinge. The locking block is provided with a buckle on the side near the slot opening.

[0012] In a further technical solution, a heat insulation plate is provided on the outer side of the heat-conducting plate.

[0013] In a further technical solution, the inner side of the heat insulation plate is provided with a movable cavity for the locking block to move.

[0014] The beneficial effects of this utility model are:

[0015] 1. Two heat-conducting plates can be spliced ​​together to form a cylindrical shape that covers the outside of the barrel. The heating rod inside the heat-conducting plate can transfer heat through the heat-conducting plate to heat the barrel evenly. The heat-conducting plate is easy to disassemble relative to the barrel. The heating rod of the heat-conducting plate can be easily disassembled and installed separately as needed by inserting the plug, which also facilitates daily disassembly and maintenance.

[0016] 2. The heating rod is connected to the plug block by a plug-in method, which makes it easy to disassemble the plug block. The connecting groove of the plug block can be connected to a cooling water pipe when the barrel needs to be cooled. The structure is flexible and easy to use.

[0017] 3. After the side of the insert block facing the barrel is connected to the connecting groove, the heating rod can partially and directly contact the outer wall of the barrel, which is beneficial to improving the heating effect;

[0018] 4. The locking element can fix the insert block in the slot;

[0019] 5. The heat insulation plate can reduce heat loss during heating and also prevent staff from accidentally touching the heat conduction plate. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a screw extruder barrel heater according to an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the heat-conducting plate described in an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram showing the connection between the insert and the heating rod according to an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of the locking block described in an embodiment of this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 10. Barrel; 20. Heat-conducting plate; 21. Connecting strip; 22. Screw hole; 23. Slot; 24. Insert block; 30. Heating rod; 40. Locking block; 41. Buckle block; 42. Bevel; 50. Heat insulation plate; 51. Movable cavity. Detailed Implementation

[0026] The embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0027] Example:

[0028] like Figures 1-3 As shown, a screw extruder barrel heater includes a heat-conducting plate 20 and a heating rod 30. The heat-conducting plate 20 includes two pieces with a semi-circular cross-section, symmetrically sleeved on the outside of the barrel 10. The two heat-conducting plates 20 are respectively provided with connecting strips 21 on opposite sides. Multiple corresponding screw holes 22 are opened on the two connecting strips 21 on the same side. The two heat-conducting plates 20 are connected by inserting bolts through the screw holes 22. Multiple slots 23 are opened on the semi-circular side of the heat-conducting plate 20. The heating rod 30 is provided with a matching slot 24 on the outside of the slot 23. The slot 24 is provided with a connecting groove to accommodate the heating rod 30. The heating rod 30 is inserted into the connecting groove, and the slot 24 is located in the slot 23.

[0029] The working principle of the above technical solution is as follows:

[0030] Two heat-conducting plates 20 can be spliced ​​together to form a cylindrical shape that covers the outside of the barrel 10. The heating rod 30 inside the heat-conducting plate 20 can be heated evenly by heat transfer through the heat-conducting plate 20. The heat-conducting plate 20 is easy to disassemble relative to the barrel 10. The heating rod 30 connected to the heat-conducting plate 20 by the insert block 24 is easy to disassemble and install individually as needed, and it is also convenient for daily disassembly and maintenance. The insert block 24 can serve as a protective sleeve for the heating rod 30 and as a stable support between the heating rod 30 and the slot 23. Compared with machining multiple slots to match the heating rod 30 on the heat-conducting plate 20, it is more convenient to machine a connecting slot to accommodate the heating rod 30 on the single, smaller-volume insert block 24. The heating rod 30 is easy to disassemble relative to the insert block 24, and the heating rod 30 can also be removed individually from the connecting slot. When the barrel 10 needs to be cooled, a cooling water pipe can be connected to the connecting ear slot. The structure is flexible and easy to use.

[0031] In another embodiment, such as Figure 3 As shown, the side of the insert 24 facing the barrel 10 is connected to the connecting groove.

[0032] A portion of the heating rod 30 can directly contact the outer wall of the barrel 10, which helps to improve the heating effect.

[0033] In another embodiment, such as Figure 1 , Figure 2 and Figure 4As shown, a locking element is provided on the outer side of the heat-conducting plate 20 corresponding to the slot opening of the slot 23; the locking element includes a locking block 40 and a torsion spring. An installation port is provided on the side of the slot opening away from the barrel 10. One side of the locking block 40 is hinged to the side of the installation port away from the slot opening. The torsion spring is located at the hinge. A latch 41 is provided on the side of the locking block 40 near the slot opening. The latch 41 is used to latch the edge of the insert 24 to achieve a locking function. An inclined surface 42 for squeezing and opening the locking block 40 is provided on the side of the latch 41 away from the hinge. In order to make reasonable use of the setting space and make the structure more stable, the slots 23 are respectively opened on opposite sides of the heat-conducting plate 20. Two slots 23 on the same side of the heat-conducting plate 20 are spaced apart to leave setting space on the other side of the heat-conducting plate 20. The slots 23 on opposite sides are alternately set.

[0034] When the insert 24 is inserted into the slot 23, one side presses the inclined surface 42 of the latch 41, causing the locking block 40 to rotate along the hinge in a direction away from the slot 23 until the insert 24 is fully inserted into the slot 23. The torsion spring rebounds and causes the locking block 40 to rotate in the opposite direction. The latch 41 overlaps the edge of the insert 24, thus locking the insert 24.

[0035] In another embodiment, such as Figure 2 As shown, a heat insulation plate 50 is provided on the outer side of the heat conduction plate 20, and an active cavity 51 for the locking block 40 to move is provided on the inner side of the heat insulation plate 50 corresponding to the locking block 40. The active cavity 51 can satisfy the condition that the latching block 41 can leave the insert block 24 after the locking block 40 is rotated.

[0036] The heat insulation plate 50 can reduce heat loss during heating and also prevent staff from accidentally touching the heat conduction plate 20.

[0037] The embodiments described above merely illustrate specific implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A screw extruder barrel heater, characterized in that, It includes a heat-conducting plate and a heating rod. The heat-conducting plate consists of two pieces with a semi-circular cross-section, symmetrically fitted on the outside of the barrel. The two heat-conducting plates are detachably connected on opposite sides. Multiple slots are provided on the semi-circular side of the heat-conducting plate. The heating rod has a matching slot insert on its outer side, and the insert is located in the slot.

2. A screw extruder barrel heater according to claim 1, characterized in that, The two heat-conducting plates are provided with connecting strips on opposite sides, and the connecting strips are provided with multiple screw holes. The two opposite connecting strips are connected by screw bolts.

3. A screw extruder barrel heater according to claim 1, characterized in that, The insert block has a connecting groove for accommodating a heating rod, and the heating rod is inserted into the connecting groove.

4. A screw extruder barrel heater according to claim 3, characterized in that, The side of the insert block facing the barrel is connected to the connecting groove.

5. A screw extruder barrel heater according to claim 1, characterized in that, The slots are respectively opened on opposite sides of the heat-conducting plate. Two slots on the same side of the heat-conducting plate are spaced apart to leave space for the other side of the heat-conducting plate. The slots on opposite sides are alternately arranged.

6. A screw extruder barrel heater according to claim 5, characterized in that, A locking element is provided at the slot opening corresponding to the outer side of the heat-conducting plate.

7. A screw extruder barrel heater according to claim 6, characterized in that, The locking component includes a locking block and a torsion spring. The slot opening is provided with an installation port on the side away from the barrel. One side of the locking block is hinged to the side of the installation port away from the slot opening. The torsion spring is located at the hinge. The locking block is provided with a buckle on the side near the slot opening.

8. A screw extruder barrel heater according to claim 7, characterized in that, A heat insulation plate is provided on the outer side of the heat-conducting plate.

9. A screw extruder barrel heater according to claim 8, characterized in that, The inner side of the heat insulation plate has a movable cavity for the locking block to move at the corresponding position.

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