Multi-point open type hot runner assembly

Abstract

The utility model provides a multi-point open type hot runner assembly. The multi-point open type hot runner assembly comprises a heating box, a material inlet and a shunting pipe, a feeding hole is formed in the top of the heating box; a main road and a branch road are arranged in the heating box; a shunt pipe is arranged at the bottom of the heating box; and the shunting pipe is connected to the tail end of the branch trunk. The problem that too many waste products are caused by insufficient heating is effectively solved, long-time heating is achieved by arranging the main trunk line and the branch trunk lines in the heating box, the forming rate of products is increased, and the rejection rate is greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to hot runner technical field especially relates to a kind of multi-point open hot runner assembly. BACKGROUND

[0002] Hot runner is kept by the method of heating to ensure that the plastic of runner and gate is in molten state, hot runner system is generally composed of hot nozzle, flow divider, temperature control box and accessories, hot nozzle generally includes two kinds, open hot nozzle and needle valve hot nozzle.

[0003] The existing technology is, heating rod and heating ring are arranged near or in the center of runner, and the entire runner from the nozzle outlet of injection molding machine to gate is in high-temperature state, so that the plastic in the runner is kept molten.

[0004] However, the existing hot runner needs a period of time process to be stable, and the hot material is not heated completely, so that the incomplete hot material is sprayed from the discharge port, causing more waste products at the beginning of injection molding, resulting in waste of resources. INVENTION CONTENTS

[0005] In view of the above problems, the utility model is provided to provide a kind of multi-point open hot runner assembly to overcome the above problems or at least partially solve the above problems.

[0006] To solve the above problems, the utility model discloses a kind of multi-point open hot runner assembly, comprising: heating box, inlet and flow divider;The heating box top sets inlet;The heating box inside is provided with main channel and branch channel;The heating box bottom is provided with flow divider;The flow divider is connected to the end of the branch channel.

[0007] Further, the flow divider includes winding coil, hot runner and nozzle;The winding coil is annularly arranged on the outer wall of the hot runner;The bottom of the hot runner is provided with nozzle;The hot runner can be detachably connected to the end of the branch channel, and is arranged on the bottom of the heating box.

[0008] Further, the heating box further includes temperature controller;The temperature controller is arranged on the surface of the heating box;The winding coil is electrically connected to the temperature controller.

[0009] Further, the flow divider further includes temperature sensor;The temperature sensor is arranged on the end of the hot runner which is not provided with nozzle;The temperature sensor is electrically connected to the temperature controller.

[0010] Further, the multi-point open hot runner assembly further includes recovery box;The heating box is arranged above the recovery box.

[0011] Further, the multi-point open hot runner assembly further comprises a fixing column; one end of the fixing column is fixedly arranged at the side end of the recycling box, and the other end is fixed at the side end of the heating box.

[0012] The utility model discloses the following advantages:

[0013] Through the heating box that internally sets up main trunk and branch, can make the plastic in the heating box get fully heated, further heats through the shunt pipe, greatly promotes the yield, reduces the scrap rate, improves the efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structure schematic diagram of an embodiment of a multi-point open hot runner assembly of the utility model,

[0015] Figure 2 It is a structure schematic diagram of the shunt pipe of an embodiment of a multi-point open hot runner assembly of the utility model,

[0016] Figure 3 It is a structure schematic diagram of the shunt pipe of an embodiment of a multi-point open hot runner assembly of the utility model.

[0017] In the drawing: 1, heating box;2, inlet;3, shunt pipe;4, temperature controller;5, recycling box;6, fixing column;31, winding coil;32, hot runner;33, nozzle;34, temperature sensor. DETAILED DESCRIPTION

[0018] In order to make the above-mentioned purpose, features and advantages of the utility model more obvious and easy to understand, the utility model is further explained in detail below by combining with the drawings and specific embodiments.

[0019] Referring to Figure 1 , a structure schematic diagram of an embodiment of a multi-point open hot runner assembly of the utility model is shown, and specifically can include: heating box 1, inlet 2 and shunt pipe 3;The heating box 1 top sets up inlet 2;The heating box 1 internally sets up main trunk and branch;The heating box 1 bottom sets up shunt pipe 3;The shunt pipe 3 is connected to the end of the branch channel.It needs to be explained that the plastic in molten state is passed into the inlet 2 and enters the heating box 1, the heating box 1 makes the plastic keep a certain temperature and heats, and flows in the main trunk and branch channel in the heating box 1, and is heated while moving in the main trunk and branch channel, so that the plastic in the heating box 1 is fully heated, when the plastic flows out from the shunt pipe 3, has been heated enough, and the waste product produced by starting injection molding is less.

[0020] Further, the branch trunks are several, and the branch trunks are connected to the main trunk, and the several flow distribution pipes 3 are arranged corresponding to the number of the branch trunks, and the several flow distribution pipes 3 are connected to the ends of the corresponding branch trunks, and further, the plastics flowing through each flow distribution pipe 3 can be heated to different degrees, and different heating temperatures can be set according to actual needs, and plastics in different molten states at different temperatures can be obtained, and the plastics can be used in different occasions.

[0021] Further, the multi-point open hot flow assembly further comprises a recycling box 5, and the heating box 1 is arranged above the recycling box 5. Even if a longer main trunk and branch trunks are arranged, considering economic factors and other factors, some waste products will still be produced when starting injection molding, and the recycling box 5 is still needed to recycle waste plastics.

[0022] Further, the multi-point open hot flow assembly further comprises a fixing column 6, one end of the fixing column 6 is fixedly arranged at the side end of the recycling box 5, and the other end is fixedly arranged at the side end of the heating box 1. It should be noted that the fixing column 6 is used to fix the heating box 1 above the recycling box 5, so as to avoid separation from the working position.

[0023] Further, referring to Figure 2 and Figure 3, respectively show a kind of multi-point open hot runner assembly of the embodiment of the utility model structure schematic diagram, wherein, the shunt pipe 3 includes around coil 31, hot runner 32 and nozzle 33;The around coil 31 ring is set in the outer wall of the hot runner 32;The bottom of the hot runner 32 is provided with nozzle 33;The hot runner 32 can be detachably connected to the end of the main trunk, and is arranged in the bottom of the heating box 1;The heating box 1 further includes temperature controller 4;The temperature controller 4 is arranged on the surface of the heating box 1;The around coil 31 is electrically connected to the temperature controller 4;The shunt pipe 3 further includes temperature sensor 34;The temperature sensor 34 is arranged at one end of the hot runner 32 which is not provided with nozzle 33;The temperature sensor 34 is electrically connected to the temperature controller 4.It needs to be explained that, the temperature controller 4 causes the change of magnetic field by controlling the current change of the around coil 31, and then makes the hot runner 32 heat, and the principle is electromagnetic heating, the material of the hot runner 32 must be conductive material (usually ferromagnetic material), when the alternating current passes through the around coil 31 wound on the conductive material, the around coil 31 will generate alternating magnetic field around it.And because the current is alternating, the magnetic field is also alternating, resulting in the change of magnetic flux through the coil inside. According to Faraday's law of electromagnetic induction, the change of magnetic flux will generate induced electromotive force (voltage) in the conductive material (such as metal workpiece), and then generate closed induced current in the material, which is usually called eddy current. When eddy current flows in conductive material, due to the resistance of the material itself, eddy current will encounter the action of resistance in the flow process, thereby generating heat. And this phenomenon is called Joule heating effect, that is, the heat energy generated when current passes through resistance.

[0024] And electromagnetic heating is mainly in the surface layer of conductive material (according to skin effect, eddy current mainly concentrates in the surface of material), so electromagnetic heating is mainly to heat the surface of material, that is, to heat the hot runner 32, and the hot runner 32 heats the medium in its channel, which saves a heat exchange process, so that the heating process is more efficient. By controlling the frequency, amplitude and layout of alternating current, the depth and temperature of heating can be accurately controlled.

[0025] Further, the heating principle of the heating box 1 is to heat the heating sheet, the heating sheet is connected with the circuit of the temperature controller 4, and the heating sheet starts to heat when power is on. The heat is transferred to the molten plastic through the main trunk and the branch trunk, and the heating is completed.

[0026] Finally, it needs to be pointed out that in this paper, such as the first and second relationship terms are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the term "includes", "comprises" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or terminal device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or terminal device. Without more limitations, the element defined by the statement "includes a" does not exclude the presence of other identical elements in the process, method, article or terminal device including the element.

[0027] The above provides a kind of multi-point open hot runner assembly provided by the utility model, has carried out detailed introduction, the principle and implementation mode of the utility model are described in this paper by applying specific example, the above embodiment is only for helping to understand the method of the utility model and its core idea;Meanwhile, for the general technical personnel in the art, according to the idea of the utility model, there will be changes in specific implementation mode and application range, as described above, the content of the specification should not be understood as the limitation of the utility model.

Claims

1. A multi-point open hot runner assembly characterized by, The application relates to a heating box, which comprises the following parts: a heating box, a feeding inlet and a branch pipe; the feeding inlet is arranged on the top of the heating box; a main channel and branch channels are arranged in the heating box; the branch pipe is arranged on the bottom of the heating box; the branch pipe is connected to the end of the branch channel; the branch pipe comprises a winding coil, a hot runner and a nozzle; the winding coil is arranged on the outer wall of the hot runner; the bottom of the hot runner is provided with the nozzle; the hot runner is detachably connected to the end of the branch channel and arranged on the bottom of the heating box; the heating box further comprises a temperature controller, which is arranged on the surface of the heating box; the winding coil is electrically connected to the temperature controller; the branch pipe further comprises a temperature sensor, which is arranged on the end of the hot runner without the nozzle; the temperature sensor is electrically connected to the temperature controller.

2. The multi-point open hot runner assembly of claim 1, wherein, The branch channels are arranged in the heating box; the branch channels are connected to the main channel; the branch pipe is arranged in the number corresponding to the number of the branch channels.

3. The multi-point open hot runner assembly of claim 1, wherein, The heating mode of the heating box is heating by a heating sheet.

4. The multi-point open hot runner assembly of claim 1, wherein, The material of the hot runner is a ferromagnetic material.

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