A foam cutting tool having a lead weight structure

Abstract

The utility model provides a kind of foam cutting tool with lead plummet structure, including arm clamping rod, electric heating wire, lead plummet, pressure regulator and power supply electrically connected with pressure regulator, the both ends of electric heating wire are connected with the upper center of the one end of arm clamping rod and lead plummet respectively, pressure regulator has two output ends, and the both ends of electric heating wire are electrically connected with corresponding output end by wire respectively;The one end of electric heating wire and an output end connected with lead plummet are connected on the upper portion of lead plummet by pressing assembly.The utility model provides stable axial tension for electric heating wire by the gravity of lead plummet, can automatically compensate the length change caused by electric heating wire due to thermal expansion and contraction, effectively avoids the relaxation and shaking of electric heating wire in cutting process;Meanwhile, the central guide hole and the wire outlet coaxially arranged in lead plummet ensure that electric heating wire always extends along the axial direction of lead plummet, provide accurate vertical guide for cutting movement, so as to jointly guarantee the flatness and perpendicularity of cutting surface, improve processing quality.

Description

Technical Field

[0001] This utility model relates to the field of foam cutting technology, specifically to a foam cutting tool with a lead weight structure. Background Technology

[0002] In fields such as product prototyping, sculptural art, and composite material mold manufacturing, foam blanks are often used to create models through subtractive processing. In existing technologies, using the thermal melting properties of heating wires to cut foam blanks is a common method. This typically involves directly fixing both ends of a heating wire to corresponding support points on a cutting frame. By applying electricity to the heating wire, the foam blank or the heating wire frame is then manually moved relative to each other, thus achieving the cutting and separation of the foam.

[0003] However, the heating wires in the existing technology will stretch due to thermal expansion when energized and shrink after cooling. The direct rigid fixation method cannot dynamically compensate for the effective cutting length of the heating wire, which makes the heating wire easy to loosen and bend during the cutting process. This seriously affects the straightness and perpendicularity of the cutting plane, resulting in unexpected arcs or wavy textures on the cutting surface, making it difficult to guarantee the processing accuracy. Utility Model Content

[0004] To address the technical problems existing in the background art, this utility model provides a foam cutting tool with a lead weight structure.

[0005] The technical solution of this utility model is as follows: A foam cutting tool with a lead weight structure includes an arm clamping rod, a heating wire, a lead weight, a voltage regulator, and a power supply electrically connected to the voltage regulator. The two ends of the heating wire are respectively connected to one end of the arm clamping rod and the upper center of the lead weight. The voltage regulator has two output ends, and the two ends of the heating wire are electrically connected to the corresponding output ends through wires. One end of the heating wire is connected to the lead weight, and an output end is connected to the upper part of the lead weight via a clamping assembly.

[0006] The structure of the lead weight is as follows: the lead weight includes a guide post and a cone-shaped body that are coaxial and integrally formed. The guide post has a central guide hole that is adapted to the end of the heating wire along its axial direction. The bottom of the central guide hole has a wire outlet that communicates with it. The end of the heating wire extends outward by passing through the central guide hole and the wire outlet in sequence.

[0007] The specific structure of the clamping assembly is as follows: the clamping assembly includes an insulated arc-shaped plate and a clamping member. The arc-shaped plate is located outside the guide post, and the connection point between one end of the heating wire connected to the plumb bob and the wire is clamped inside the arc-shaped plate by the clamping member.

[0008] The clamping component has the following structure: it includes an insulated clamping plate and a clamping screw. The clamping plate is located inside the arc-shaped plate, and the clamping screw is threadedly connected to the arc-shaped plate. Its end is rotatably connected to the clamping plate.

[0009] To facilitate the electrical connection of the heating wire from the central guide hole through the wire outlet to the corresponding output terminal, the bottom surface of the central guide hole is flush with the bottom surface of the wire outlet, which facilitates the sliding of the end of the heating wire.

[0010] To protect the connection points between the heating wire and the conductor and to avoid the risk of human contact, an insulating protective cap is provided on the upper surface of the curved plate.

[0011] To facilitate positioning the center of one end of the upper heating wire at the end of the arm clamping rod, a vertical wire harness groove is provided in the middle of one end of the arm clamping rod, and the wire harness groove is adapted to the heating wire.

[0012] To facilitate better support of the operator's arm by the arm clamping rod, increase the contact area with the human arm, and reduce the pressure on the inside of the arm by the arm clamping rod, an arm placement groove is provided on the upper end of the arm clamping rod. The arm placement groove is located at the end of the arm clamping rod away from the cable tray, so that the inside of the operator's arm can be well supported on the arm placement groove.

[0013] To facilitate the installation of the wire on the insulating protective cap, an opening adapted to the wire is provided on one side of the insulating protective cap.

[0014] The beneficial effects of this utility model are as follows: The weight of the plumb bob provides stable axial tension to the heating wire, automatically compensating for length changes caused by thermal expansion and contraction, effectively preventing slack and vibration of the heating wire during cutting. At the same time, the coaxially arranged central guide hole and wire outlet inside the plumb bob ensure that the heating wire always extends along the axis of the plumb bob, providing precise vertical guidance for the cutting motion. Together, these factors ensure the straightness and perpendicularity of the cut surface, improving the processing quality.

[0015] The connection point between the heating wire end and the lead wire is firmly clamped to the upper part of the lead weight by the cooperation of the insulated arc plate and the tightening screw. This not only provides a stable electrical connection and reduces local overheating caused by poor contact, but also enables quick assembly and disassembly through the threaded connection, which facilitates the replacement and maintenance of the heating wire. Attached Figure Description

[0016] In the attached diagram: Figure 1 This is a structural diagram; Figure 2 for Figure 1 Enlarged structural diagram at point A in the middle; Figure 3This is a schematic diagram of the cross-sectional structure of a plumb bob; Figure 4 This is a schematic diagram of the arm clamping rod structure; Figure 5 This is a schematic diagram of the clamping component structure; The components represented by the various reference numerals in the diagram are: 1. Arm clamping rod; 11. Cable tray; 12. Arm placement tray; 2. Heating wire; 3. Weight; 31. Guide post; 311. Central guide hole; 312. Wire outlet; 32. Conical body; 4. Voltage regulator; 41. Output end; 42. Input end; 5. Power supply; 6. Clamping assembly; 61. Arc plate; 62. Tightening component; 621. Tightening plate; 622. Tightening screw; 7. Insulating protective cap; 71. Opening; 8. Foam blank; 9. Wire. Detailed Implementation

[0017] Example 1 See Figure 1 and Figure 2 As shown, a foam cutting tool with a lead weight 3 structure includes an arm clamping rod 1, a heating wire 2, a lead weight 3, a voltage regulator 4, and a power supply 5 electrically connected to the voltage regulator 4. The heating wire 2 is used to cut foam blanks 8. The two ends of the heating wire 2 are respectively connected to one end of the arm clamping rod 1 and the upper center of the lead weight 3. The voltage regulator 4 has two output terminals 41, and the two ends of the heating wire 2 are electrically connected to the corresponding output terminals 41 through wires 9. The voltage regulator 4 includes an input terminal 42 and two output terminals 41. Its input terminal 42 is electrically connected to the power supply 5. Both the voltage regulator 4 and the power supply 5 are existing technologies.

[0018] One end of the heating wire 2 that connects to the lead weight 3 and an output end 41 are connected to the upper part of the lead weight 3 through a clamping assembly 6, that is, one end of the heating wire 2 that connects to the lead weight 3 and an output end 41 are electrically connected to the upper part of the lead weight 3.

[0019] See Figure 2 and Figure 3 As shown, the lead weight 3 in this embodiment includes a coaxial guide post 31 and a conical body 32 integrally formed on both sides. The tip of the conical body 32 faces downward. The guide post 31 has a central guide hole 311 along its axial direction that is adapted to the end of the heating wire 2. The central guide hole 311 is coaxial with the guide post 31. The bottom of the central guide hole 311 has a wire outlet 312 communicating with it. The end of the heating wire 2 extends outward by passing through the central guide hole 311 and the wire outlet 312 in sequence. To facilitate the heating wire 2 to pass through the central guide hole 311 and the wire outlet 312 and be electrically connected to a corresponding output terminal 41, the bottom surface of the central guide hole 311 is flush with the bottom surface of the wire outlet 312, which facilitates the sliding of the end of the heating wire 2.

[0020] See Figure 5As shown, the clamping assembly 6 in this embodiment includes an insulated arc-shaped plate 61 and a clamping member 62. The arc-shaped plate 61 is disposed outside the guide post 31. The connection point between one end of the heating wire 2 connected to the plumb bob 3 and the wire 9 is clamped within the arc-shaped plate 61 by the clamping member 62. The clamping member 62 includes an insulated clamping plate 621 and an insulated clamping screw 622. The clamping plate 621 is located inside the arc-shaped plate 61, and the clamping screw 622 is threadedly connected to the arc-shaped plate 61. The end of the clamping screw 622 is rotatably connected to the clamping plate 621. When the clamping screw 622 rotates, it will not drive the clamping plate 621 to rotate. Tightening the clamping screw 622 can drive the clamping plate 621 to move within the arc-shaped plate 61 along the radial direction of the arc-shaped plate 61, thereby clamping and disassembling the connection point between the heating wire 2 and the wire 9.

[0021] To protect the connection point between the heating wire 2 and the output terminal 41, an insulating protective cap 7 is provided on the upper surface of the arc-shaped plate 61. The insulating protective cap 7 is made of insulating and heat-insulating material. The insulating protective cap 7 completely covers the live connection point located above the plumb bob 3, effectively preventing accidental contact by operators and eliminating the risk of electric shock. In addition, to facilitate the installation of the wire 9 on the insulating protective cap 7, an opening 71 adapted to the wire 9 is provided on one side of the insulating protective cap 7.

[0022] See Figure 4 As shown, to facilitate the center positioning of one end of the upper heating wire 2 at the end of the arm clamping rod 1, a vertical wire harness groove 11 is provided in the middle of one end of the arm clamping rod 1. The wire harness groove 11 is adapted to the heating wire 2. The wire harness groove 11 ensures the center positioning of the end of the upper heating wire 2 and corresponds to the guide structure of the lower plumb bob 3, providing precise vertical guidance for the cutting motion, thereby jointly ensuring the straightness and perpendicularity of the cutting surface and improving the processing quality.

[0023] The upper end of the arm clamping rod 1 is provided with an arm placement groove 12, which is located at the end of the arm clamping rod 1 away from the wire harness groove 11. The inside of the operator's arm can be well supported on the arm placement groove 12. The arm placement groove 12 on the arm clamping rod 1 increases the contact area between the tool and the operator's arm, making the force more even. The operator can complete the cutting operation by holding the end of the arm clamping rod 1, which can reduce the local pressure caused by long-term operation, reduce fatigue, and improve the comfort and stability of operation.

Claims

1. A foam cutting tool with a plumb bob structure, characterized in that, The device includes an arm clamping rod (1), a heating wire (2), a lead weight (3), a voltage regulator (4), and a power supply (5) electrically connected to the voltage regulator (4). The two ends of the heating wire (2) are respectively connected to one end of the arm clamping rod (1) and the upper center of the lead weight (3). The voltage regulator (4) has two output terminals (41). The two ends of the heating wire (2) are electrically connected to the corresponding output terminals (41) through wires (9). One end of the heating wire (2) connected to the plumb bob (3) and an output end (41) are connected to the upper part of the plumb bob (3) via a clamping assembly (6).

2. A foam cutting tool with a plumb bob structure according to claim 1, characterized in that, The lead weight (3) includes a guide post (31) and a cone (32) that are coaxial and integrally formed. The guide post (31) has a central guide hole (311) that is adapted to the end of the heating wire (2) along its axial direction. The bottom of the central guide hole (311) has a wire outlet (312) that communicates with it. The end of the heating wire (2) extends outward through the central guide hole (311) and the wire outlet (312) in sequence.

3. A foam cutting tool with a plumb bob structure according to claim 2, characterized in that, The clamping assembly (6) includes an insulated arc plate (61) and a clamping member (62). The arc plate (61) is located outside the guide post (31). The connection point between one end of the heating wire (2) connected to the plumb bob (3) and the wire (9) is clamped inside the arc plate (61) by the clamping member (62).

4. A foam cutting tool with a plumb bob structure according to claim 3, characterized in that, The clamping member (62) includes an insulated clamping plate (621) and a clamping screw (622). The clamping plate (621) is located inside the arc plate (61), and the clamping screw (622) is threadedly connected to the arc plate (61), with its end rotatably connected to the clamping plate (621).

5. A foam cutting tool with a plumb bob structure according to claim 2, characterized in that, The bottom surface of the central guide hole (311) is flush with the bottom surface of the wire outlet (312).

6. A foam cutting tool with a lead weight structure according to claim 3 or 4, characterized in that, An insulating protective cap (7) is provided on the upper surface of the arc-shaped plate (61).

7. A foam cutting tool with a plumb bob structure according to claim 1, characterized in that, A vertical wire harness groove (11) is provided in the middle of one end of the arm clamping rod (1), and the wire harness groove (11) is adapted to the heating wire (2).

8. A foam cutting tool with a plumb bob structure according to claim 7, characterized in that, The upper end face of the arm clamping rod (1) is provided with an arm placement groove (12), which is located at one end of the arm clamping rod (1) away from the wire harness groove (11).

9. A foam cutting tool with a plumb bob structure according to claim 6, characterized in that, The insulating protective cap (7) has an opening (71) on one side that is adapted to the wire (9).

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