CN213675246U - Constant-temperature hot runner system - Google Patents

Abstract

The utility model discloses a constant temperature hot runner system, which comprises a heating plate, wherein a flow passage arranged in the heating plate is communicated with one end of a hot nozzle arranged at one side of the heating plate, which is contacted with a die cavity parting surface; the heating plate is provided with a heating plate thermocouple, the heating plate thermocouple is electrically connected with a PID controller, and the PID controller receives a heating plate temperature signal obtained by measuring the heating plate thermocouple and controls the heating of the hot nozzle through a hot nozzle thermocouple transmission signal connected with the hot nozzle. The utility model relates to a special constant temperature hot runner system to PVC-U heat sensitivity material of moulding plastics, adopt the structure of hot mouth and hot plate, use the even heat conduction of heat pipe, use the accurate control temperature change of PID temperature controller to ensure that the hot plate keeps the constancy of temperature, the production of cold burden when having reduced the cold runner and having saved because need handle the collection that the runner cold burden brought, transport, smash, store, the used and recovered the produced manpower of processes such as retrieval and utilization, material resources, the cost loss of material, resources and energy have been saved greatly.

Description

Constant-temperature hot runner system

Technical Field

The utility model relates to the field of moulds, in particular to a constant-temperature hot runner system for thermosensitive materials (such as PVC-U).

Background

For the hot runner and cold runner glue inlet structure of the conventional structure of hot-to-cold conversion, the front end of a hot nozzle is in contact with a die cavity parting surface, and then alternating current is injected into a product cavity through a cold runner for molding; the structure ensures that the heat energy at the front end of the hot nozzle is easy to dissipate along with the cooling of the cavity, so that the temperature of the cold runner is reduced; in order to keep the molten state of the plastic, the hot nozzle must be continuously heated to supplement the dissipation of heat energy, because the cold runner and the sprue are both arranged on the cavity, the thermocouple of the hot nozzle can only sense the temperature of the hot nozzle, but cannot sense the temperatures of the plastic in the cavity and the sprue part, so that larger temperature sensing deviation exists, the temperature of the sprue part cannot be kept stable, the molten state of the plastic during product injection molding is inconsistent, the injection molding flow rate is inconsistent, and the product can have surface defects such as injection lines or butterfly spots.

For the heat-sensitive material, because the temperature change has great influence on the melting state of the material, the glue inlet structure of the hot runner and the cold runner in the conventional structure is difficult to ensure the stability of the temperature of the plastic at the glue inlet by controlling the temperature change of the hot nozzle, the temperature change can cause uneven heating and abnormal change of the glue, the flow rate is unstable to generate aggregate, and after long time, the aggregate area can be burnt and blackened after being heated for a long time, and the speed and the efficiency of the hot runner are further influenced; even black spots are generated on the product, which affects the product quality. Therefore, for an injection mold for molding thermo-sensitive materials (such as PVC-U and the like), a rubber feeding mode using a sprue bush and a cold runner of a runner is still the mainstream manufacturing method, but the method brings about a series of operations of shearing, storing, running, cleaning, baking, crushing, mixing and using the runner to recycle rubber, so that a large amount of manpower, material resources and financial resources are increased, and the quality of products can be changed by filling and using excessive recycled materials, so that the digestion and the use of the products also need a long time, and the operation difficulty of plastic manufacturers is increased.

The utility model provides a constant temperature hot runner system, which controls the heating mode by arranging heat conduction pipes and thermocouple temperature sensing transmission signals in a heating plate; the heat conduction pipe is arranged outside the hot nozzle, and the heat insulation sleeve is arranged outside the heat conduction pipe, so that the unidirectional transmission of heat energy is ensured, and the heat energy loss is reduced to the minimum value. When the heating device works actually, after the hot nozzle is heated, the heat energy at the front end of the hot nozzle is transferred to the heating plate, the heat conduction pipe in the heating plate guides the heat energy to each part of the heating plate, particularly to a pouring gate part of a runner for feeding glue, the temperature of the glue material needing to be kept in a molten state is set through the thermocouple for sensing the temperature, the external PID controller is used for setting the temperature of the glue material needing to be kept in the molten state, and an instruction is sent to heat the hot nozzle to supplement the heat energy for conveying in time, so; the utility model relates to a special constant temperature hot runner system to heat sensitivity injection moulding materials such as PVC-U adopts the structure of hot mouth + hot plate, uses the even heat conduction of heat pipe, uses the accurate control temperature change of PID controller to come to reach the hot plate and keep constancy of temperature, and the heat conduction of make full use of heat pipe is quick, the temperature difference change is sensitive, keep the constancy of temperature characteristic through heat-conducting controllability.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art not enough, provide a constant temperature hot runner system to solve the problem that proposes in the above-mentioned technical background.

In order to achieve the above object, the present invention provides a method for manufacturing a semiconductor device, comprising:

a constant-temperature hot runner system comprises a heating plate, wherein a flow passage arranged in the heating plate is communicated with one end, which is contacted with a die cavity parting surface, of a hot nozzle arranged on one side of the heating plate; and the heating plate is provided with a heating plate thermocouple, the heating plate thermocouple is electrically connected with a PID controller, and the PID controller is used for receiving a heating plate temperature signal obtained by measuring the heating plate thermocouple and controlling the heating of the hot nozzle.

Among the above-mentioned technical scheme, the hot plate is formed by first hot plate and the equipment of second hot plate first hot plate is provided with first runner towards second hot plate one side the second hot plate is provided with the second runner towards first hot plate one side, first runner and second runner are mutually supported and are formed the runner.

In the above technical scheme, the runner is provided with at least one gate, and each gate is correspondingly communicated with the corresponding mold cavity.

Among the above-mentioned technical scheme, first hot plate and first hot plate are inside all to be provided with a plurality of first heat pipes that have.

In the technical scheme, a plurality of second heat conduction pipes are arranged on the periphery of the hot nozzle, and heat insulation sleeves are further sleeved outside the second heat conduction pipes.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the first heat conduction pipe is arranged in the heating plate, and the heat conduction speed and the heat sensitivity are high by utilizing the heat conduction pipe, so that the heating requirement on a cold runner area is met; the whole process pressure and flow velocity of the plastic runner are uniform, and the product quality and performance are fully ensured;

2. the hot nozzle is externally provided with a second heat conduction pipe, and the second heat conduction pipe is externally provided with a heat insulation sleeve, so that the unidirectional transmission of heat energy is ensured, and the heat energy loss is reduced to the minimum value;

3. the heating plate is independently controlled by a thermocouple, so that timely supplementary heating of the heating temperature of the hot nozzle can be ensured, and the constant region value of the temperature required to be kept in a molten state is met; the application of the corresponding heat-sensitive material (such as PVC-U material and the like) has immeasurable huge market prospect and profit;

4. the structure has the advantages that the space position required by the heating part is not additionally occupied and increased, the layout characteristic of the compact requirement of the mold design is met, due to the advantage, the structure is particularly suitable for the transformation of the original cold runner mold, the input parts and the processing cost are low, the manufacture is simple and the time is short, the difficulty of cost budget requiring a plastic factory to input large transformation funds is avoided, and considerable economic benefit can be brought to the plastic factory.

5. The structure is pertinently applied to hot injection of heat-sensitive materials (such as PVC-U and the like), reduces the generation of cold materials during cold runner injection molding, saves the cost loss of manpower, material resources and materials caused by collection, transportation, crushing, storage, recycling and other processes brought by the need of processing the cold materials of runners, and greatly saves resources and energy.

6. Because the heating plate is fixed on the die cavity of the die plate by using screws, the detachable structure can meet the requirements of timely cleaning and clearing heat-sensitive materials (such as PVC-U and the like), the part has light weight and small volume, and the whole die does not need to be detached from an injection molding machine, thereby saving time, labor and space.

7. Because the temperature is controllable, the problems of plastic scorching, blackening and the like are avoided from the plasticizing of the plastic, the generation of toxic gas is reduced and avoided, and the environment pollution is avoided.

Drawings

Fig. 1 is a front view of the present invention;

fig. 2 is a side view of the present invention;

FIG. 3 is a front view of the heating plate and the hot nozzle of the present invention;

FIG. 4 is a side view of the heating panel of the present invention connected to a hot nozzle;

FIG. 5 is a front view of the first heating plate;

FIG. 6 is a rear view of the first heating plate;

FIG. 7 is a front view of a second heated plate;

FIG. 8 is a rear view of the second heating plate;

FIG. 9 is a schematic view of the construction of the hot nozzle;

FIG. 10 is an assembly view of the present invention applied in a mold;

in the figure, 1, a heating plate; 1a, positioning pins; 1.1, a first heating plate; 1.2, a second heating plate; 1.3, a flow channel; 1.31, a first flow passage; 1.32, a second flow passage; 1.4, a pouring gate; 1.5, matching the conical surface; 2. a hot nozzle; 3.1, heating a plate thermocouple; 3.2, a hot nozzle thermocouple; 4. a PID controller; 5. a first heat conductive pipe; 6. a second heat conductive pipe; 7. a thermal insulation sleeve; 8. copper blocking;

100. moving the template; 200. fixing a template; 300. fixing the die panel; 301. and (6) positioning rings.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.

It should be noted that the drawings provided in the following embodiments are only for illustrating the basic concept of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the form, amount and ratio of the components in actual implementation may be changed at will, and the layout of the components may be more complicated.

Referring to fig. 1 to 9, the utility model provides a constant temperature hot runner system, which comprises a heating plate 1, wherein a flow passage 1.3 arranged inside the heating plate 1 is communicated with one end of a hot nozzle 2 arranged at one side of the heating plate 1, which is contacted with a die cavity parting surface; a heating plate thermocouple 3.1 is arranged on the heating plate 1, the heating plate thermocouple 3.1 is electrically connected with a PID controller 4, a hot nozzle thermocouple 3.2 is arranged on the hot nozzle 2, and the hot nozzle thermocouple 3.2 is electrically connected with the PID controller 4; the PID controller 4 is used for receiving a heating plate 1 temperature signal obtained by measuring the heating plate thermocouple 3.1 and controlling the heating of the hot nozzle 2 by transmitting a signal through the thermocouple 3.2 connected with the hot nozzle 2. Specifically, the heating plate 1 is connected with an external PID controller 4 by adopting a thermocouple wire of a heating plate thermocouple 3.1; the hot nozzle 2 is connected with an external PID controller 4 by a thermocouple 3.2 thermocouple wire. The PID temperature controller 4 is an external device, the PID controller 4 sets a temperature upper and lower limit value area, when the temperature transmitted to the PID controller by the thermocouple temperature sensor is lower than the set temperature area value lower limit, the PID controller sends a signal to the circuit to electrify the hot nozzle for heating, and when the temperature transmitted to the PID controller by the thermocouple temperature sensor is higher than the set temperature area value lower limit, the PID controller sends a signal to the circuit to cut off the power to stop heating the hot nozzle. Therefore, the heat energy input of the hot nozzle is kept in a controllable stable region value by sensing of the thermocouple and the high sensitivity of the PID controller and controlling the circuit to be powered on and off, and the constant temperature range required by melting plastic is achieved. The thermocouple is used for detecting the temperature of a body contacted with the front end of the thermocouple and converting a temperature signal into a thermal electromotive force signal, and the thermal electromotive force signal is converted into the temperature of a measured medium through an electric instrument (PID controller).

Referring to fig. 3 to 8, the heating plate 1 is assembled by a first heating plate 1.1 and a second heating plate 1.2, a first flow channel 1.31 is disposed on a surface of the first heating plate 1.1 facing the second heating plate 1.2, and a second flow channel 1.32 is disposed on a surface of the second heating plate 1.2 facing the first heating plate 1.1; the surfaces, close to each other, of the first heating plate 1.1 and the second heating plate 1.2 are in limited connection through a positioning pin 1a, and meanwhile, the first flow channel 1.31 and the second flow channel 1.32 are matched with each other to form the flow channel 1.3; a matching conical surface 1.5 is further arranged on one surface of the first heating plate 1.1, which is far away from the second heating plate 1.2, the matching conical surface 1.5 is matched and hermetically connected with one end, which is contacted with a die cavity parting surface, of the hot nozzle 2, and the runner 1.3 is communicated with the hot nozzle 2 through the matching conical surface 1.5 to form an internal channel for plastic flowing;

the utility model discloses in, be equipped with a runner 1.4 on the runner 1.3 at least, and every the corresponding intercommunication of corresponding mould die cavity is all with it to runner 1.4.

Referring to fig. 1 and 2, a plurality of first heat conduction pipes 5 are disposed inside the first heating plate 1.1 and the first heating plate 1.2. A plurality of first heat conduction pipes 5 are transversely and longitudinally arranged on the first heating plate 1.1, and the plurality of first heat conduction pipes 5 are distributed on the periphery of the first flow channel 1.31; a plurality of first heat conduction pipes 5 are transversely and longitudinally arranged on the second heating plate 1.2, and the plurality of first heat conduction pipes 5 are distributed on the periphery of the second flow channel 1.32; the position where each first heat conductive pipe 5 communicates with the outside is blocked by a copper plug 7.

Referring to fig. 1 and 2, a plurality of second heat conduction pipes 6 are arranged on the periphery of the hot nozzle 2, and an insulating sleeve 7 is further sleeved outside the plurality of second heat conduction pipes 6. The first heat pipe 5 that sets up on hot plate 1, the second heat pipe 6 that sets up between the mouth and the insulation cover 7 are penetrated outward to hot mouth 2 all plays the effect with heat transfer for heat transfer speed is fast, and is even.

PID temperature controller 4 is connected through heating plate thermocouple 3.1 with heating plate 1, and heating plate thermocouple 3.1 is used for feeding back the temperature variation of heating plate 1 to give PID temperature controller 4 with temperature signal transmission, PID temperature controller 4 controls hot mouth 2 through the hot mouth thermocouple 3.2 of being connected with hot mouth 2 and heats supplementary heat energy, and with heat energy transmission to heating plate 1.

Referring to fig. 10, the utility model is assembled in a mold, a heating plate 1 is assembled on a die cavity parting surface between a movable mold plate 100 and a fixed mold plate 200, specifically, a first heating plate 1.1 and a second heating plate 1.2 are connected into a whole through a positioning pin 1a, the first heating plate 1.1 and the second heating plate 1.2 are fixed on the die cavity of the fixed mold plate 200 through screws, and a sprue 1.4 of a runner 1.3 of the heating plate 1 is correspondingly communicated with the die cavity; a flow channel 1.3 of the heating plate 1 is opposite to one end of the hot nozzle 2 contacting the parting surface of the cavity through a matching conical surface 1.5 on one surface of the first heating plate 1.1 far away from the second heating plate 1.2 and is matched and sealed with the hot nozzle to form an internal channel for plastic flowing; the feeding end of the hot nozzle 2 is limited by a positioning ring 301 on the fixed die panel 300 and is used for being butted with a nozzle of an injection molding machine.

The above-mentioned embodiments only express the specific embodiments of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.

Claims (5)

1. The constant-temperature hot runner system is characterized by comprising a heating plate (1), wherein a runner (1.3) arranged in the heating plate (1) is communicated with one end, which is contacted with a parting surface of a cavity, of a hot nozzle (2) arranged on one side of the heating plate (1); the heating plate (1) is provided with a heating plate thermocouple (3.1), the heating plate thermocouple (3.1) is electrically connected with a PID controller (4), and the PID controller (4) is used for receiving a heating plate (1) temperature signal obtained by measuring the heating plate thermocouple (3.1) and controlling the heating of the hot nozzle (2).

2. The constant-temperature hot runner system according to claim 1, wherein the heating plate (1) is assembled by a first heating plate (1.1) and a second heating plate (1.2), a first runner (1.31) is arranged on one surface of the first heating plate (1.1) facing the second heating plate (1.2), a second runner (1.32) is arranged on one surface of the second heating plate (1.2) facing the first heating plate (1.1), and the first runner (1.31) and the second runner (1.32) are matched with each other to form the runner (1.3).

3. A constant temperature hot runner system according to claim 2 wherein the runner (1.3) is provided with at least one gate (1.4) and each gate (1.4) is in communication with its respective mould cavity.

4. A constant temperature hot runner system according to claim 2, wherein the first heating plate (1.1) and the first heating plate (1.2) are each internally provided with a number of first heat pipes (5).

5. The constant-temperature hot runner system according to claim 1, wherein a plurality of second heat-conducting pipes (6) are arranged on the periphery of the hot nozzle (2), and a heat-insulating sleeve (7) is sleeved outside the plurality of second heat-conducting pipes (6).

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