Hot runner heater

Abstract

The utility model discloses a hot runner heater which comprises a heater body and a copper sleeve, the heater body comprises a connector, a wire, a leading-out wire and an electric heating wire, the wire is connected with one end of the connector, the other end of the connector is connected with the leading-out wire, one end of the electric heating wire is connected with the leading-out wire, and the other end of the electric heating wire is connected with the copper sleeve. The other end of the electric heating wire is arranged in the copper sleeve, and the electric heating wire is in a spiral shape. The heating nozzle has the beneficial effects that the elastic heating wire is arranged, and the heater is formed by winding and can stretch out and draw back according to different lengths, so that different heaters do not need to be customized according to the length of the heating nozzle, and the cost is reduced; the spiral groove is formed in the copper sleeve, the spiral groove is matched with the electric heating wire, the copper sleeve part can effectively guarantee the temperature of the nozzle tip position, stable and balanced heating is kept, and the heat preservation effect of a product is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding heating, in particular to a hot runner heater. Background Art

[0002] When the hot nozzle is injecting, the molten injection plastic needs to be kept at a high temperature, otherwise the plastic may cool down and cause the hot nozzle to be blocked. In view of this, it is usually necessary to heat the hot nozzle runner during injection molding.

[0003] Existing hot runner heating equipment is generally customized in advance according to the size of the hot nozzle. If the hot nozzle is replaced during injection molding of different injection molds, the heater also needs to be replaced. The corresponding heater needs to be customized in advance according to the hot nozzle model that may be used for actual injection molding, which increases production costs. In addition, the existing copper sleeve is directly mounted on the heater, which may be unstable during injection molding. Utility Model Content

[0004] The purpose of the utility model is to provide a hot runner heater to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a hot runner heater, comprising a heater body and a copper sleeve, the heater body comprising a joint, a wire, a lead wire and a heating wire, the wire being connected to one end of the joint, the other end of the joint being connected to the lead wire, one end of the heating wire being connected to the lead wire, the other end of the heating wire being arranged in the copper sleeve, and the heating wire being in a spiral shape.

[0006] Preferably, the heating wire comprises a first section and a second section, and the pitch of the first section is smaller than the pitch of the second section.

[0007] Preferably, a spiral groove is provided in the copper sleeve, and an end of the second section of the heating wire away from the first section is arranged in the spiral groove.

[0008] Preferably, the heating wire is made of elastic metal material.

[0009] Compared with the prior art, the utility model has the following beneficial effects: the utility model provides an elastic heating wire, and the heater is wound and formed, so that it can be extended and retracted according to different lengths, and there is no need to customize different heaters according to the length of the hot nozzle, thereby reducing costs; a spiral groove is provided in the copper sleeve, and the spiral groove cooperates with the heating wire, so that the copper sleeve part will not slide, and the temperature at the tip of the nozzle can be effectively guaranteed, the heating can be kept stable and balanced, and the thermal insulation effect of the product can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the structure of the utility model.

[0011] In the figure: 1, heater body; 11, connector; 12, wire; 13, lead wire; 14, heating wire; 2, copper sleeve; a, first section; b, second section. DETAILED DESCRIPTION

[0012] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0013] See also Figure 1 The utility model provides a technical solution: a hot runner heater, comprising a heater body 1 and a copper sleeve 2, wherein the heater body 1 comprises a joint 11, a wire 12, a lead wire 13 and a heating wire 14, wherein the wire 12 is connected to one end of the joint 11, and the other end of the joint 11 is connected to the lead wire 13, and one end of the heating wire 14 is connected to the lead wire 13, and the other end of the heating wire 14 is arranged in the copper sleeve 2, and the heating wire 14 is in a spiral shape. The heating wire 14 comprises a first section a and a second section b, and the pitch of the first section a is smaller than the pitch of the second section b. A spiral groove 21 is arranged in the copper sleeve 2, and an end of the second section b of the heating wire 14 away from the first section a is arranged in the spiral groove 21. The heating wire 14 is made of elastic metal material.

[0014] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hot runner heater, characterized in that: The invention comprises a heater body and a copper sleeve, wherein the heater body comprises a joint, a wire, a lead wire and a heating wire, wherein the wire is connected to one end of the joint, and the other end of the joint is connected to the lead wire, one end of the heating wire is connected to the lead wire, and the other end of the heating wire is arranged in the copper sleeve, and the heating wire is in a spiral shape.

2. A hot runner heater according to claim 1, characterized in that: The heating wire comprises a first section and a second section, and the pitch of the first section is smaller than the pitch of the second section.

3. A hot runner heater according to claim 2, characterized in that: A spiral groove is arranged in the copper sleeve, and an end of the second section of the heating wire away from the first section is arranged in the spiral groove.

4. A hot runner heater according to claim 1, characterized in that: The heating wire is made of elastic metal material.

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