CN219522869U

CN219522869U - Direct cooling type injection mold

Info

Publication number: CN219522869U
Application number: CN202222983361.5U
Authority: CN
Inventors: 佘器普
Original assignee: Zhongxing Xingda Auto Accessories Co ltd
Current assignee: Zhongxing Xingda Auto Accessories Co ltd
Priority date: 2022-11-09
Filing date: 2022-11-09
Publication date: 2023-08-15
Anticipated expiration: 2032-11-09

Abstract

The utility model relates to a direct cooling type injection mold, and belongs to the technical field of injection molds; the direct cooling type injection mold comprises a movable mold core, a fixed mold cooling pipeline, a temperature sensor, a cooling system and a cooling system, wherein the movable mold cooling pipeline wraps the outer side of the movable mold core; according to the utility model, the movable mold core and the fixed mold core of the injection mold are covered in multiple directions through the cooling pipeline, the multiple molds are subjected to omnibearing uniform cooling, the cooling effect is improved, the cooling system is optimally controlled through the PLC-carried PID temperature control system, and the cooling efficiency is improved.

Description

Direct cooling type injection mold

Technical Field

The utility model relates to a direct cooling type injection mold, and belongs to the technical field of injection molds.

Background

The temperature of the plastic melt in a common plastic injection mold is about 200 ℃, and the temperature of the plastic part is below 60 ℃ when the plastic part is taken out of the mold cavity. Therefore, after injection molding, the thermoplastic plastic must be effectively cooled to ensure that the injection molding piece can be more reliably cooled and shaped and rapidly demoulded, thereby improving the shaping quality and the production efficiency of the plastic piece. Most of the existing injection molds with cooling devices are simple in structure, cannot cool raw materials rapidly and uniformly, and can cause uneven solidification of different positions of a workpiece, so that the workpiece is deformed, and the rejection rate is improved; and in the process of injection molding, because the molten raw materials is poured into between the upper die and the lower die through the injection molding machine at a high speed, the upper die and the lower die can be impacted, meanwhile, the high-temperature raw materials can heat the die, and at the moment, if the die cannot be cooled timely, the mechanical property of the die can change under the action of thermal expansion and cold contraction, and displacement can occur between the movable die and the fixed die, so that the quality of injection molding parts is influenced. Therefore, a direct cooling type injection mold is provided, and the cooling efficiency of the injection mold is improved.

Disclosure of Invention

In order to overcome the problems in the background art, the movable mold core and the fixed mold core of the injection mold are covered in multiple directions through the cooling pipeline, the multi-mold uniformly cools and cools in all directions, the solidification unevenness of different positions of the injection molding piece is avoided, the cooling effect is improved, the cooling is performed before the temperature is conducted to the mold frame, the deformation of the mold frame caused by heating is avoided, the rejection rate is reduced, and the cooling system is optimally controlled through the PLC carried PID temperature control system, so that the cooling and cooling efficiency is improved.

In order to solve the problems in the background art, the utility model is realized by the following technical scheme:

the utility model provides a direct cooling type injection mold includes cooling system, movable mould cooling pipeline, temperature sensor, movable mould benevolence, cover half cooling pipeline, cover half benevolence, the movable mould cooling pipeline parcel is lived the movable mould benevolence outside, and the movable mould cooling pipeline passes through the pipe connection cooling system, and the cover half cooling pipeline embedding is in the cover half benevolence, and the cover half cooling pipeline passes through the pipe connection cooling system, and temperature sensor installs on movable mould benevolence and cover half benevolence and is connected to cooling system.

Preferably, the cooling system comprises a refrigerator, a water pump, an electromagnetic valve, a PLC, a temperature sensor and a circulating pipeline, wherein the refrigerator is connected to a pipeline water inlet of the injection mold through the circulating pipeline, the water pump and the electromagnetic valve are arranged on the circulating pipeline, the input end of the PLC is connected with the temperature sensor, the output end of the PLC is connected with the refrigerator, the water pump and the electromagnetic valve, and the PLC is internally provided with a PID control module.

Preferably, the movable mold cooling pipeline and the fixed mold cooling pipeline are parallel pipelines formed by more than two flat pipes.

Preferably, the pipeline comprises a water inlet pipe and a water outlet pipe, the water inlet pipe and the water outlet pipe penetrate through the movable die frame to be connected with the summarizing movable die cooling pipeline, and the water inlet pipe and the water outlet pipe penetrate through the fixed die frame to be connected with the summarizing fixed die cooling pipeline.

The beneficial effects of the utility model are as follows:

according to the utility model, the movable mold core and the fixed mold core of the injection mold are covered in multiple directions through the cooling pipeline, the multi-mold performs omnibearing uniform cooling, so that solidification unevenness at different positions of the injection molding piece is avoided, the cooling effect is improved, the cooling is performed before the temperature is conducted to the mold frame, the mold frame is prevented from being deformed due to heating, the rejection rate is reduced, and the cooling system is optimally controlled through the PLC carried PID temperature control system, so that the cooling efficiency is improved.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of a cooling channel of a movable mold insert according to the present utility model;

FIG. 3 is a schematic diagram of a cooling system according to the present utility model;

FIG. 4 is a diagram of a PLC connection framework of the present utility model;

FIG. 5 is a block diagram of the PID control of the present utility model.

The reference numerals in the figures are: 1-a movable mold cooling pipeline; 2-piping; 2-1 of a water inlet pipe; 2-2 of a water outlet pipe; 3-positioning the guide sleeve; 4-a temperature sensor; 5-a movable mould frame; 6-moving the mold core; 7-pouring gate; 8-a fixed mold cooling pipeline; 9-fixing the mould core; 10-positioning guide posts; 11-thimble; 12-setting a die frame; 13-a water pump; 14-a refrigerator; 15-an electromagnetic valve; 16-circulation pipeline.

Description of the embodiments

In order to make the objects, technical solutions and advantageous effects of the present utility model more apparent, preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings, so as to facilitate understanding of the skilled person.

As shown in fig. 1 to 3, the direct cooling injection mold comprises a movable mold cooling pipeline 1, a pipeline 2, a water inlet pipe 2-1, a water outlet pipe 2-2, a positioning guide sleeve 3, a temperature sensor 4, a movable mold frame 5, a movable mold core 6, a pouring opening 7, a fixed mold cooling pipeline 8, a fixed mold core 9, a fixed mold frame 12, a water pump 13, a refrigerator 14, an electromagnetic valve 15 and a circulating pipeline 16, wherein the movable mold cooling pipeline 1 is a frame pipeline formed by connecting 6 copper flat pipes in parallel, the copper flat pipes can be connected with the movable mold core 6 in a large area, the copper heat conduction effect is better, the copper flat pipes can play a role of cooling, the movable mold cooling pipeline 1 is arranged on the outer side of the movable mold core 6 and wraps the movable mold core 6, the water inlet pipe 2-1 passes through the movable mold frame 5 to be arranged on a summarizing opening of the movable mold cooling pipeline 1, the water outlet pipe 2-2 passes through the movable mold frame 5 to be arranged on the other side of the movable mold cooling pipeline 1, the water inlet pipe 2-1 and the water outlet pipe 2-2 is connected with the refrigerator 14 through the circulating pipeline, and the pouring opening 7 is avoided when the movable mold cooling pipeline 1 is arranged; the fixed mold cooling pipeline 8 is embedded in the fixed mold core 9 and is formed by connecting 4 copper flat pipes in parallel, the water inlet pipe 2-1 and the water outlet pipe 2-2 penetrate through the fixed mold frame 12 to be symmetrically connected to the fixed mold cooling pipeline 8, and the fixed mold cooling pipeline is connected with the refrigerator 14 through the circulating pipeline 16.

The movable mold core 6 and the fixed mold core 9 are provided with a plurality of temperature sensors 4 for detecting the temperature of each position of the mold core, the temperature sensors 4 are connected to the PLC input end, the PLC output end is connected with a refrigerator 14, a water pump 13, an electromagnetic valve 15 and a display screen, the PLC is used for controlling the starting and closing of an injection mold cooling system and controlling the temperature of cooling liquid through a PID temperature control module, so that the injection mold is efficiently and quickly cooled to a set temperature in a set time, the water pump 13 and the electromagnetic valve 15 are arranged on a circulation pipeline 16, the circulation pipeline 16 is arranged on the refrigerator 14 and is used for carrying out circulation conveying on the cooling liquid, and the circulation pipeline 14 is respectively connected with a water inlet pipe orifice and a water outlet pipe orifice of the movable mold and the fixed mold of the injection mold.

The PID temperature control algorithm of the direct cooling type injection mold system comprises the following steps: s1, setting a cooling temperature; s2, acquiring a temperature value of a controlled object at the current moment, determining a proportion coefficient Kp under the condition of determining flow and flow velocity, and determining an integral regulator coefficient Ki and a differential regulator coefficient Kd according to the temperature sampling data for a plurality of times; s3, PID operation is carried out according to the temperature value and the temperature target value of the cooling liquid at the current moment, and the optimal running power of the condenser is obtained; s4, adjusting the power of the condenser according to the PID operation result to finish primary power adjustment; s5, repeating the steps S2 to S4 until the set temperature is completed.

Finally, it is noted that the above-mentioned preferred embodiments are only intended to illustrate rather than limit the utility model, and that, although the utility model has been described in detail by means of the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the utility model as defined by the appended claims.

Claims

1. A direct cooling type injection mold is characterized in that: the direct cooling type injection mold comprises a cooling system, a movable mold cooling pipeline (1), a pipeline (2), a temperature sensor (4), a movable mold core (6), a fixed mold cooling pipeline (8) and a fixed mold core (9), wherein the movable mold cooling pipeline (1) wraps the outer side of the movable mold core (6), the movable mold cooling pipeline (1) is connected with the cooling system through the pipeline (2), the movable mold cooling pipeline (1) is embedded in the fixed mold core (9), the fixed mold cooling pipeline (8) is connected with the cooling system through the pipeline (2), and the temperature sensor (4) is arranged on the movable mold core (6) and the fixed mold core (9) and connected to the cooling system.

2. The direct-cooled injection mold of claim 1, wherein: the cooling system comprises a refrigerator (14), a water pump (13), an electromagnetic valve (15), a PLC (programmable logic controller), a PID (proportion integration differentiation) control module, a temperature sensor (4) and a circulating pipeline (16), wherein the refrigerator (14) is connected to a water inlet of a pipeline (2) of the injection mold through the circulating pipeline (16), the water pump (13) and the electromagnetic valve (15) are arranged on the circulating pipeline (16), the input end of the PLC is connected with the temperature sensor (4), and the output end of the PLC is connected with the refrigerator (14), the water pump (13) and the electromagnetic valve (15), and the PID control module is arranged in the PLC.

3. The direct-cooled injection mold of claim 1, wherein: the movable mold cooling pipeline (1) and the fixed mold cooling pipeline (8) are parallel pipelines which are formed by more than two flat pipes.

4. The direct-cooled injection mold of claim 1, wherein: the pipeline (2) comprises a water inlet pipe (2-1) and a water outlet pipe (2-2), the water inlet pipe (2-1) and the water outlet pipe (2-2) penetrate through the movable die frame (5) to be connected with a summarizing movable die cooling pipeline (1), and the water inlet pipe (2-1) and the water outlet pipe (2-2) penetrate through the fixed die frame (12) to be connected with a summarizing fixed die cooling pipeline (8).