Electric heating tube for heating mold

Abstract

The utility model relates to an electric heating tube of a heating mould in the field of electric heating tubes, which comprises a tube body, a heating cavity is arranged in the tube body, a seal is arranged at an opening of the heating cavity, an ejection component is arranged at one end of the tube body far away from the seal, and the ejection component comprises a positioning block, an ejection head and a compression spring. The two ends of the compression spring are connected with the inner walls, capable of sliding in the sliding grooves, of the top heads correspondingly, the axis of the sliding grooves coincides with the axis of the pipe body, a wire holder is arranged at the end, away from the pipe body, of the sealing opening, a connecting plate is arranged on the surface of the wire holder, and a fixed installation part is arranged on the surface of the connecting plate. When the tube body needs to be taken out and replaced, the fixing bolt is screwed off, the connecting plate is separated from the mold, the tube body is ejected out of the mold by a certain distance under the action of the compression spring, at the moment, a worker can hold the connecting plate to pull the tube body out of the mold, and therefore the electric heating tube is more convenient to disassemble and assemble.

Description

Technical Field

[0001] The utility model relates to the field of electric heating pipes, in particular to an electric heating pipe for heating a mold. Background Art

[0002] An injection mold is a tool used to produce plastic products, and it is also a tool that gives plastic products a complete structure and precise dimensions. Injection molding is a processing method used in the mass production of certain parts with complex shapes. The heated and molten plastic is injected into the mold cavity under high pressure by an injection molding machine. After cooling and solidification, a molded product is obtained. Injection molds usually need to be heated during use. By heating the mold, the plastic can flow and form better, thereby improving molding efficiency and product quality. There are many ways to heat the mold, including direct heating with electric heating tubes, steam heating, electromagnetic heating, and heating with a mold temperature controller. Among them, direct heating with electric heating tubes is the most common method, with the advantages of fast heating speed, easy maintenance, and low overall mold cost.

[0003] An electric heating element is an electrical component used for heating. Its working principle is that current generates heat in the heating wire, which is then transferred to the metal tube, raising the surface temperature of the metal tube, thereby achieving the purpose of heating. Electric heating elements are widely used in various heating equipment, such as mold heating and reactor heating.

[0004] When removing and replacing existing electric heating tubes for molds, the tubes are often in a high-temperature state, causing the tube body to expand easily. In order to better transfer heat to the mold, the gap between the tube body and the mold is usually small. The expanded tube body and the pressure inside the mold increase. In addition, the surface of the tube body is usually smooth, making it difficult for workers to grasp the surface of the tube body to remove the electric heating tube. Utility Model Content

[0005] In order to overcome the deficiencies of the existing technical solutions, the utility model provides an electric heating tube for heating a mold, which can effectively solve the technical problem of inconvenient disassembly and assembly of the tube body.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] The cam is provided with a plurality of holes, the holes being arranged on the top of the cam and the bottom of the cam, and the holes are connected to form a circle around the cam, so that the cam can be connected to the cam by a plurality of holes.

[0008] Furthermore, a circle of limiting constriction is provided at the opening of the slide groove, and a limiting boss is provided on the side wall of the plug.

[0009] Furthermore, the end surfaces of the plug close to the compression spring and the slide groove are both arranged in an annular groove, and the two ends of the compression spring are respectively inserted into the annular groove of the plug and the annular groove on the end surface of the slide groove.

[0010] Furthermore, a guide sleeve is provided in the slide groove, the axis of the guide sleeve coincides with the axis of the slide groove, a guide rod is provided at one end of the head close to the slide groove, the axis of the guide rod coincides with the axis of the guide sleeve, and the guide rod can be inserted into the guide sleeve.

[0011] Furthermore, a bolt hole parallel to the axis of the tube body is provided on the surface of the positioning block, a threaded hole aligned with the bolt hole is provided at one end of the tube body close to the positioning block, and the positioning block is fixedly connected to the tube body by a connecting bolt.

[0012] Furthermore, a connecting thread is provided on the surface of the terminal block, a terminal port is provided at one end of the terminal block away from the seal, and a lead-out rod is provided at one end of the seal close to the tube body, and both ends of the lead-out rod are conductively connected to the terminal port and the heating wire respectively.

[0013] Compared with the prior art, the beneficial effects of the present invention are: a pushing assembly is provided, and the tube body is inserted into the heating hole of the mold. When the push head contacts the bottom surface of the heating hole, the tube body continues to be pushed inward, so that the push head squeezes the compression spring and moves into the slide groove. The connecting plate is fixedly connected to the surface of the mold by a fixing bolt, so that the tube body is fixed in the heating hole of the mold. When the tube body needs to be taken out and replaced, the fixing bolt is unscrewed to separate the connecting plate from the mold. Under the action of the compression spring, the tube body is pushed out of the mold to a distance from one end. At this time, the worker can hold the connecting plate to pull the tube body out of the mold, thereby making the disassembly and assembly of the electric heating tube more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1This is a schematic structural diagram of an electric heating tube for heating a mold according to the present invention;

[0015] Figure 2 This is a schematic diagram of the interior of a tube body in an electric heating tube for heating a mold according to the present invention;

[0016] Figure 3 for Figure 2 A partial enlarged view of point A in the middle;

[0017] Numbers in the figure: 1-tube body, 2-heating chamber, 3-heating wire, 4-seal, 5-positioning block, 6-head, 7-compression spring, 8-bolt hole, 9-connecting bolt, 10-slide groove, 11-limiting boss, 12-limiting shrinkage, 13-annular groove, 14-guide sleeve, 15-guide rod, 16-connection seat, 17-connecting plate, 18-fixed installation part, 19-fixing bolt, 20-lead rod, 21-connection port. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] The following combination Figure 1-Figure 3 A detailed description of the electric heating tube for heating the mold of the utility model is given below:

[0020] A heating tube for heating a mold, comprising a tube body 1, a heating chamber 2 being provided in the tube body 1, a heating wire 3 being provided in the heating chamber 2, a seal 4 being provided at the opening of the heating chamber 2, the tube body 1 being provided with three, a push-out assembly being provided at one end of the tube body 1 away from the seal 4, the push-out assembly comprising a positioning block 5, a plug 6 and a compression spring 7, a bolt hole 8 being provided on the surface of the positioning block 5 being parallel to the axis of the tube body 1, a threaded hole being provided at one end of the tube body 1 close to the positioning block 5 being aligned with the bolt hole 8, the positioning block 5 being fixedly connected to the tube body 1 by a connecting bolt 9, a slide groove 10 being provided in the positioning block 5, the plug 6 and the compression spring 7 being provided in the slide groove 10, and the two ends of the compression spring 7 being respectively engaged with the inner wall of the slide groove 10 of the plug 6 The plug 6 is connected in a row, and the plug 6 can move along the axial direction of the slide 10. The axis of the slide 10 coincides with the axis of the tube body 1. A circle of limiting shrinkage 12 is provided at the opening of the slide 10, and a limiting boss 11 is provided on the side wall of the plug 6. The end faces of the plug 6 close to the compression spring 7 and the slide 10 are both provided in annular grooves 13. The two ends of the compression spring 7 are respectively inserted into the annular groove 13 of the plug 6 and the annular groove 13 on the end face of the slide 10. A guide sleeve 14 is provided in the slide 10, and the axis of the guide sleeve 14 coincides with the axis of the slide 10. A guide rod 15 is provided at one end of the plug 6 close to the slide 10, and the axis of the guide rod 15 coincides with the axis of the guide sleeve 14. The guide rod 15 can be inserted into the guide sleeve 14.

[0021] A terminal block 16 is provided at the end of the seal 4 away from the tube body 1, and a connecting plate 17 is provided on the surface of the terminal block 16. A positioning hole is provided on the connecting plate 17. The terminal block 16 can be set on the connecting plate 17 through the positioning hole. A fixed mounting portion 18 is provided on the surface of the connecting plate 17. A fixing bolt 19 for connecting to the mold is provided on the fixed mounting portion 18. A connecting thread is provided on the surface of the terminal block 16. A terminal port 21 is provided at the end of the terminal block 16 away from the seal 4, and a lead-out rod 20 is provided at the end of the seal 4 close to the tube body 1. The two ends of the lead-out rod 20 are respectively conductively connected to the terminal port 21 and the heating wire 3.

[0022] The electric heating tube for heating the mold of the present embodiment is provided with a pushing assembly. The tube body 1 is inserted into the heating hole of the mold. When the push head 6 contacts the bottom surface of the heating hole, the tube body 1 is continued to be pushed inward, so that the push head 6 squeezes the compression spring 7 and moves into the slide groove 10. The connecting plate 17 is fixedly connected to the surface of the mold by the fixing bolt 19, so that the tube body 1 is fixed in the heating hole of the mold. When the tube body 1 needs to be taken out and replaced, the fixing bolt 19 is unscrewed to separate the connecting plate 17 from the mold. Under the action of the compression spring 7, the tube body 1 is pushed out of the mold to a distance from one end. At this time, the worker can hold the connecting plate 17 to pull the tube body 1 out of the mold, thereby making the disassembly and assembly of the electric heating tube more convenient.

[0023] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. An electric heating tube for heating a mold, comprising a tube body, a heating cavity provided in the tube body, a heating wire provided in the heating cavity, and a seal provided at the opening of the heating cavity, characterized in that: The tube body is provided with more than three, and a pushing assembly is provided at one end of the tube body away from the seal, the pushing assembly includes a positioning block, a plug and a compression spring, a slide groove is provided in the positioning block, the plug and the compression spring are arranged in the slide groove, the two ends of the compression spring are respectively connected to the inner wall of the plug slide groove, the plug can move along the axial direction of the slide groove, the axis of the slide groove coincides with the axis of the tube body, a wiring seat is provided at one end of the seal away from the tube body, a connecting plate is provided on the surface of the wiring seat, a positioning hole is provided on the connecting plate, the wiring seat can be arranged on the connecting plate through the positioning hole, a fixed mounting part is provided on the surface of the connecting plate, and a fixing bolt for connecting with the mold is provided on the fixed mounting part.

2. The electric heating tube for heating a mold according to claim 1, characterized in that: A circle of limiting shrinkage is arranged at the opening of the slide groove, and a limiting boss is arranged on the side wall of the top.

3. The electric heating tube for heating a mold according to claim 2, characterized in that: The end surfaces of the top head close to the compression spring and the slide groove are both arranged in an annular groove, and the two ends of the compression spring are respectively inserted into the annular groove of the top head and the annular groove on the end surface of the slide groove.

4. The electric heating tube for heating a mold according to claim 3, characterized in that: A guide sleeve is arranged in the slide groove, and the axis of the guide sleeve coincides with the axis of the slide groove. A guide rod is arranged at one end of the top head close to the slide groove, and the axis of the guide rod coincides with the axis of the guide sleeve. The guide rod can be inserted into the guide sleeve.

5. An electric heating tube for heating a mold according to any one of claims 1 to 3, characterized in that: The surface of the positioning block is provided with a bolt hole parallel to the axis of the tube body, and one end of the tube body close to the positioning block is provided with a threaded hole aligned with the bolt hole. The positioning block is fixedly connected to the tube body by connecting bolts.

6. An electric heating tube for heating a mold according to any one of claims 1 to 3, characterized in that: The surface of the terminal block is provided with connecting threads, the end of the terminal block away from the seal is provided with a wiring port, the end of the seal close to the tube body is provided with a lead-out rod, and the two ends of the lead-out rod are respectively conductively connected to the wiring port and the heating wire.

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