System for controlling temperature of charging barrel

Abstract

The utility model discloses a charging barrel temperature control system which comprises a protective shell, a charging barrel penetrating through the protective shell in the longitudinal direction and a controller, the charging barrel comprises a barrel body used for containing plastic and a barrel shell wrapping the barrel body, and a heating device is arranged between the barrel shell and the barrel body; the protective shell is provided with a temperature sensor, and at least one fan and a plurality of heat dissipation holes are evenly arranged on the protective shell in the longitudinal direction. The temperature sensor is used for measuring the temperature between the barrel shell and the barrel body in real time and feeding data back to the controller. The controller controls the operation state of the heating device according to a preset temperature set value, and therefore accurate control over the temperature of the charging barrel is achieved. And meanwhile, the fan and the heat dissipation holes are arranged in the protective shell, redundant hot air in the protective shell can be exhausted in time, and the situation that the temperature of the charging barrel is too high, and the quality of plastic products is affected is avoided.

Description

Technical Field

[0001] The utility model relates to the field of injection molding machine equipment, in particular to a barrel temperature control system. Background Art

[0002] The barrel of an injection molding machine typically consists of a body that holds the plastic, a shell surrounding it, and a heating device positioned between the shell and the body. A screw is housed within the barrel, responsible for shearing, stirring, and conveying the plastic. During the plastic conveying process, the screw's rotation and the friction between the high-speed flow of the plastic and the barrel generate significant heat, causing the barrel temperature to exceed the preset limit, thereby affecting the quality of the plastic product. Therefore, precise barrel temperature control is crucial.

[0003] For example, Chinese patent publication number CN118528510A discloses an energy-saving and heat-insulating device for an injection molding machine barrel. The device comprises a vacuum insulation jacket for covering the exterior of the barrel, a front sealing jacket disposed at the front end of the vacuum insulation chamber, and a rear sealing cover disposed at the rear end of the vacuum insulation chamber. The front sealing jacket, the vacuum insulation jacket, and the rear sealing cover form an energy-saving and heat-insulating chamber. The device effectively encapsulates the heat emitted by the injection molding machine barrel through the cooperation of the vacuum layer of the front sealing jacket, the vacuum layer of the vacuum insulation jacket, and the heat-reflecting insulation layer of the rear sealing cover. This effectively insulates and retains heat from the barrel, reduces heat loss, and improves heating efficiency. However, the device does not assist in dissipating heat from the barrel. In view of this, the present invention proposes a barrel temperature control system to address the aforementioned issues. Utility Model Content

[0004] The present invention overcomes the shortcomings of the above-mentioned technologies and provides a barrel temperature control system. To achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0005] A barrel temperature control system includes a protective shell, a barrel that penetrates the protective shell longitudinally, and a controller. The barrel includes a cylinder body for accommodating plastic and a cylinder shell wrapped around the outside of the cylinder body. A heating device is provided between the cylinder shell and the cylinder body. The protective shell is equipped with a temperature sensor that penetrates the cylinder shell to measure the temperature between the cylinder shell and the cylinder body. The controller controls the operation of the heating device according to the temperature between the cylinder shell and the cylinder body measured by the temperature sensor. The protective shell is evenly provided with at least one fan and multiple heat dissipation holes along the longitudinal direction. The fan is used to blow excess hot air in the protective shell to the heat dissipation holes.

[0006] Preferably, at least one fixed vertical plate is evenly arranged in the protective shell, and the fixed vertical plate is provided with a fixed hole for the barrel to pass through.

[0007] Preferably, the fixed vertical plates divide the inner cavity of the protective shell into a plurality of heat dissipation zones, and each heat dissipation zone is provided with at least one fan.

[0008] Preferably, the protective shell is equipped with temperature sensors corresponding to the heat dissipation areas one by one.

[0009] Preferably, the protective shell is formed by an upper half shell and a lower half shell connected relative to each other, and the fixed vertical plate includes a first vertical plate arranged on the upper half shell and a second vertical plate arranged on the lower half shell, and the first vertical plate corresponds to the second vertical plate one by one.

[0010] Preferably, the fan is installed on the top of the upper half shell, the top of the upper half shell is provided with an air inlet, and the air outlet of the fan is connected to the air inlet.

[0011] Preferably, the heat dissipation holes are provided at the bottom of the lower half shell.

[0012] Preferably, the controller is a PID temperature controller.

[0013] Preferably, the heating device is a ceramic heater.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. This utility model uses a temperature sensor to measure the temperature between the barrel shell and the barrel in real time and feeds the data back to the controller. The controller controls the operating state of the heating device according to the preset temperature set point, thereby achieving precise control of the barrel temperature. At the same time, the fan and heat dissipation holes installed in the protective shell can promptly exhaust excess hot air from the protective shell, preventing the barrel temperature from being too high and affecting the quality of the plastic product.

[0016] 2. Fixed vertical plates are installed within the protective shell, dividing the inner cavity into multiple heat dissipation zones. Fans are installed in each heat dissipation zone to achieve zoned heat management. This design enables precise temperature control in every area of the barrel. Furthermore, the fixed vertical plates also support and secure the barrel, making it highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 1 is an overall schematic diagram of the barrel temperature control system of the first embodiment;

[0018] Figure 2 is an exploded schematic diagram of the protective shell of the first embodiment;

[0019] Figure 3 is a schematic structural diagram of the upper half shell of the first embodiment;

[0020] Figure 4 is a partial perspective view of a system for controlling barrel temperature according to a second embodiment;

[0021] The implementation, functional features and advantages of the present invention will be further described in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0022] The following examples further illustrate the features of the present invention and other related features to facilitate understanding by those skilled in the art:

[0023] Reference Figure 1-3 , a first embodiment of a barrel temperature control system of the present invention is proposed:

[0024] A system for controlling the temperature of a barrel comprises a protective shell 1, a barrel 2 that passes through the protective shell 1 in the longitudinal direction, and a controller. The barrel 2 comprises a barrel body for containing plastic and a barrel shell wrapped around the outside of the barrel body. A heating device is provided between the barrel shell and the barrel body, and the heating device is used to increase the temperature of the barrel body so that the plastic melts. The protective shell 1 is equipped with a temperature sensor 5, and the temperature sensor 5 passes through the barrel shell to measure the temperature between the barrel shell and the barrel body. The controller controls the operation of the heating device according to the temperature between the barrel shell and the barrel body measured by the temperature sensor 5. Since the plastic flows at high speed in the barrel and rubs against the inner wall of the barrel to generate a large amount of heat, the temperature of the barrel 2 exceeds the standard operating temperature. Therefore, the protective shell 1 is evenly provided with at least one fan 3 and a plurality of heat dissipation holes 121 along the longitudinal direction. The fan 3 is used to blow excess hot air in the protective shell 1 to the heat dissipation holes, so as to avoid the situation where the temperature of the barrel 2 is too high and affects the quality of the plastic product.

[0025] Specifically, the controller is a PID temperature controller.

[0026] The temperature control process of the present invention is as follows: First, the temperature sensor 5 measures the temperature change between the cylinder shell and the barrel, and feeds the data back to the PID temperature controller. The PID temperature controller predicts future temperature changes based on the current temperature change between the cylinder shell and the barrel. If the temperature between the cylinder shell and the barrel rises in the future, the heating device is turned off and the fan 3 is turned on. If the temperature between the cylinder shell and the barrel drops in the future, the heating device is turned on and the fan 3 is turned off, thereby achieving precise control of the temperature of the barrel 2.

[0027] like Figure 2 As shown, three fixed vertical plates 4 are evenly arranged in the protective shell 1, and the fixed vertical plates 4 are provided with fixing holes for the barrel 2 to pass through. The fixed vertical plates 4 are used to support and fix the barrel 2. In other embodiments, the protective shell 1 is provided with at least one fixed vertical plate 4.

[0028] In order to meet the temperature requirements of different stages in the injection molding process, the temperature of the injection molding machine barrel 2 is usually divided into different sections. According to the different temperatures, the injection molding machine barrel 2 is usually divided into the following areas: feeding area, plasticizing area, homogenizing area, and injection area.

[0029] In order to accurately control the temperature of each area of the barrel 2, the utility model uses a fixed vertical plate 4 to divide the inner cavity of the protective shell 1 into four heat dissipation zones, each of which is equipped with a fan 3. The protective shell 1 is equipped with a temperature sensor 5 corresponding to each heat dissipation zone, realizing zoned heat management.

[0030] like Figure 2 As shown, the protective housing 1 is composed of an upper half-shell 11 and a lower half-shell 12 connected relative to each other. The fixed vertical plates 4 include a first vertical plate 41 provided on the upper half-shell 11 and a second vertical plate 42 provided on the lower half-shell 12. The first vertical plates 41 and the second vertical plates 42 correspond one to one. When installing the barrel 2, the barrel 2 is first placed on the second vertical plate 42 of the lower half-shell 12, and then the upper half-shell 11 and the lower half-shell 12 are connected relative to each other. The barrel 2 can be installed on the protective housing 1, and the installation operation is simple.

[0031] The fan 3 is mounted on the top of the upper half shell 11. An air inlet 111 is provided on the top of the upper half shell 11, and the fan 3's air outlet is connected to the air inlet 111. Heat dissipation holes are provided at the bottom of the lower half shell 12. The fan 3 and the heat dissipation holes face each other, which helps the fan 3 blow out the hot air inside the protective shell 1, improving overall cooling efficiency.

[0032] Specifically, the heating device is a ceramic electric heater, and the fan 3 blows cold air.

[0033] Reference Figure 4 , a second embodiment of a barrel temperature control system of the present invention is proposed:

[0034] The barrel temperature control system of the second embodiment is substantially the same in structure as the first embodiment except for the number of fans 3 and fixed vertical plates 4 .

[0035] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformation made using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, is also included in the patent protection scope of the present invention.

Claims

1. A barrel temperature control system, characterized in that: The invention comprises a protective shell (1), a barrel (2) longitudinally penetrating the protective shell (1), and a controller, wherein the barrel (2) comprises a barrel body for accommodating plastic and a barrel shell wrapped around the barrel body, and a heating device is provided between the barrel shell and the barrel body; the protective shell (1) is installed with a temperature sensor (5), the temperature sensor (5) penetrating the barrel shell is used to measure the temperature between the barrel shell and the barrel body, and the controller controls the operation of the heating device according to the temperature between the barrel shell and the barrel body measured by the temperature sensor (5); the protective shell (1) is evenly provided with at least one fan (3) and a plurality of heat dissipation holes (121) along the longitudinal direction, and the fan (3) is used to blow excess hot air in the protective shell (1) to the heat dissipation holes (121).

2. A barrel temperature control system according to claim 1, characterized in that: At least one fixed vertical plate (4) is evenly arranged in the protective shell (1), and the fixed vertical plate (4) is provided with a fixed hole for the barrel (2) to pass through.

3. A barrel temperature control system according to claim 2, characterized in that: The fixed vertical plates (4) divide the inner cavity of the protective shell (1) into a plurality of heat dissipation zones, and each heat dissipation zone is provided with at least one fan (3).

4. A barrel temperature control system according to claim 3, characterized in that: The protective shell (1) is equipped with temperature sensors (5) corresponding one to one with the heat dissipation zones.

5. The barrel temperature control system according to claim 3, characterized in that: The protective shell (1) is formed by an upper half shell (11) and a lower half shell (12) being relatively connected, and the fixed vertical plate (4) comprises a first vertical plate (41) arranged on the upper half shell (11) and a second vertical plate (42) arranged on the lower half shell (12), and the first vertical plate (41) corresponds to the second vertical plate (42) one by one.

6. The barrel temperature control system according to claim 5, characterized in that: The fan (3) is installed on the top of the upper half shell (11); an air inlet (111) is provided on the top of the upper half shell (11); and an air outlet of the fan (3) is connected to the air inlet (111).

7. The barrel temperature control system according to claim 5, characterized in that: The heat dissipation hole (121) is arranged at the bottom of the lower half shell (12).

8. The barrel temperature control system according to claim 1, characterized in that: The controller is a PID temperature controller.

9. The barrel temperature control system according to claim 1, characterized in that: The heating device is a ceramic heating plate.

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