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Centralized vacuum cooling system

The central vacuum system is used in the production process of the lost foam molding machine. The drainage of the vacuum system is automatically controlled by PLC. The molding machine opens the mold quickly and cools, with low moisture content. The white mold does not deform after being released, and the surface is flat and not bulging.


Improve the environment of the molding area: When the molding machine is opened without a central vacuum system, the table top is sprinkled with water. The application of the vacuum system can achieve zero or less water splashing during mold opening, and achieve zero or no water on the ground of the work site.

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    Equipment parameters

    Technical parameters of vacuum cooling system

    no.

    name

    600JZ

    800JZ

    1000JZ

    1

    vacuum tank body

    6立方 cube

    8立方 cube

    10立方 cube

    2

    drainage tank

    0.3立方 cube

    0.5立方 cube

    0.5立方 cube

    3

    vacuum tube inlet

    Ф325

    Ф325

    Ф325

    4

    vacuum pump motor

    7.5KW×2/backup 2 interface

    7.5KW×3/backup 2 interface

    11KW×2/backup 2 interface

    5

    vacuum pump (customized)

    7.5SK-4.5E( high vacuum)

    7.5SK-4.5E( high vacuum)

    11SK-4.5E( high vacuum)

    6

    cooling circulation motor

    1ZDB-35/370W

    1ZDB-45/550W

    1ZDB-45/550W

    7

    circulating water chiller

    1.5P

    1.5P

    2.0P

    6

    drain

    DN50

    DN50

    DN80

    7

    main sewage outlet

    DN80

    DN80

    DN80

    8

    pumping speed

    230M3/h

    300M3/h

    450M3/h

    9

    maximum negative pressure

    -0.8MPa

    -0.8MPa

    -0.8MPa

    10

    current

    30A

    45A

    45A

    11

    production capacity

    for 5-6 molding machines

    for 8-10 molding machines

    for 12-15 molding machines

    12

    external dimensions

    L×W×H

    4250×2700×2800

    4700×3200×2800

    5750×3500×3200

    13

    weight kg

    3800

    4200

    4500

    14

    plant height mm

    4800

    4800

    4800

    Main configuration list

    Main Configuration List of Central Vacuum Unit

    no.

    name

    specification and model

    quantity

    manufacturer

    1

    control cabinet

    1400X600X400

    1

    customized

    2

    touch screen

    TP307TB-HZHW“TFT

    1

    TRE

    3

    controller

    VS232MR

    1

    taiwan

    4

    vacuum tank

    6m³/8m³/10m³

    1

    self made

    5

    taiwan butterfly valve

    DN50

    4

    zhejiang haoye

    6

    drainage tank

    0.3m³

    1

    self made

    7

    condenser

     

    1

    customized

    8

    analog module

    VS4A

    1

    taiwan

    9

    temperature detection module

    VS2PT

    1

    taiwan

    10

    temperature detection

    PT100

    1

    HAWEI

    11

    cooling system

    1.5P

    1

    gree

    12

    frequency converter

    EM303-7.5KW

    1

    sine

    13

    air switch

    4P63A

    1

    erkai

    14

    air switch

    2P10A

    1

    erkai

    15

    air switch

    2P16A

    1

    erkai

    16

    motor air switch

    GV2ME

    2

    schneider

    17

    ac contactor

    LC1N3210

    5

    schneider

    18

    pilot lamp

    XB2-AC220V红色 red

    1

    schneider

    19

    pilot lamp

    XB2-DC24V绿色 green

    1

    schneider

    20

    flat green button

    XB2-BA31C

    1

    schneider

    21

    transfer switch

    XB2-BD227C

    1

    schneider

    22

    repeater relay

    RXM2 DC24V+ base

    7

    schneider

    23

    switch power supply

    S-100-24

    1

    mingwei

    24

    vacuum pump

    7.5KW/SK-4.5E//11·KW/SK-4.5E

     

    shanghaiyulong

    25

    pressure sensor

    0-1Bar

    1

    HAWEI

    Power supply: 3×380/220V 50HZ; Power supply access cable specification: 25-40mm2.

    Power supply: 3 × 380/220V 50HZ;  Specification of power supply incoming wire: 25-40mm2.

    Air source pressure 0.6-0.8MPA When compressed air is used, it must be ensured that the water content and cleanliness of the compressed air are qualified.

    When using compressed air with a supply pressure of 0.6-0.8MPA, it is necessary to ensure that the water content and cleanliness of the compressed air are qualified.

    Technical standard

    The central vacuum unit adopts PLC automatic control, and the tubular condenser has a closed cycle.

    The negative pressure pump adopts multiple sets of variable frequency control, with adaptive start stop function.

    The negative pressure of the system is maintained between -0.05MPa and -0.08MPa, and the pumping capacity of a single pump is ≥ 250m3/h.

    The vacuum cooling system includes a vacuum tank and a drainage tank, with volumes of 10m3 and 0.3m3 respectively; Including 3 sets 7.5KW vacuum pumps.

    The drainage of the vacuum system is automatically controlled by PLC, and it is not allowed to shut down for drainage. The negative pressure during operation is not allowed to be lower than -4 kilograms; The white mold has fast cooling, low moisture content, no deformation after the white mold is released, and the surface is flat and not bulging.

    When opening the mold, there is no water or less water splashing out, reaching the ground of the work site with little or no water.

    The cooling water of the vacuum system adopts a closed-loop circulating cooling system, without separate cooling water pipes and wastewater discharge.

    Start the system and the main vacuum pump group starts working until the vacuum level in the vacuum tank reaches the set upper limit value. The vacuum pump automatically stops running, and the vacuum in the central vacuum system is maintained by the automatic cut-off of the vacuum check valve on the pipeline.

    If the vacuum level inside the vacuum tank drops and falls below the set lower limit due to work requirements, the backup vacuum pump set will automatically start. As a result, the vacuum degree of the vacuum system can maintain a stable vacuum source and meet the requirements of production.