JP2009172937A5

JP2009172937A5 -

Info

Publication number: JP2009172937A5
Application number: JP2008015882A
Authority: JP
Filing date: 2008-01-28
Publication date: 2010-09-16
Anticipated expiration: 2028-01-28

Claims

An inkjet printing apparatus that performs printing by ejecting photocurable ink from a recording head of a head unit onto a recording medium that moves relative to the head unit,
The head unit includes a head holding unit that holds the recording head on a surface facing the recording medium, and light irradiation that irradiates the photocurable ink discharged from the recording head with light that cures the photocurable ink. And a cooling fan for cooling the light irradiation unit,
The ink jet printing apparatus, wherein the head holding unit includes a duct having a suction port formed on a surface facing the recording medium and a discharge port formed in a region where the cooling fan sucks air.

A fin-type heat sink that is disposed adjacent to the head holding unit and absorbs and diffuses heat from the light irradiation unit, and is attached to the outer periphery of the heat sink, adsorbs the ink mist of the photocurable ink and absorbs air. A filter that passes only,
The cooling fan sucks air between the fins of the heat sink, causes air to flow between the fins through the filter, and forcibly convects the air between the fins.
The inkjet printing apparatus according to claim 1, wherein the discharge port of the duct is formed on a surface of the head holding portion facing the filter.

3. The inkjet printing apparatus according to claim 2, wherein the filter has a finer portion in contact with another surface than a portion in contact with the surface of the heat sink facing the discharge port.

2. The head holding portion includes a protruding portion protruding toward the recording medium along the edge portion at an edge portion far from the recording head among edge portions of the suction port. 4. The inkjet printing apparatus according to any one of items 1 to 3.

A medium feeding mechanism that conveys the recording medium in a medium conveying direction; and a head scanning mechanism that reciprocates the head unit along a head scanning direction that intersects the medium conveying direction.
The light irradiating unit and the cooling fan are arranged at adjacent positions in the head scanning direction end of the head holding unit, respectively.
The duct is formed inside each of the head scanning direction end portions of the head holding portion with the recording head interposed therebetween,
Control means for lowering the number of rotations of the cooling fan on the moving direction side of the head unit lower than the number of rotations of the cooling fan on the opposite side to the moving direction when the head unit reciprocates. The inkjet printing apparatus according to any one of claims 1 to 4.

A medium feeding mechanism that conveys the recording medium in a medium conveying direction; and a head scanning mechanism that reciprocates the head unit along a head scanning direction that intersects the medium conveying direction.
The light irradiating unit and the cooling fan are arranged at adjacent positions in the head scanning direction end of the head holding unit, respectively.
The duct is formed inside each of the head scanning direction end portions of the head holding portion with the recording head interposed therebetween,
The inkjet printing apparatus according to claim 1, further comprising: a closing unit that closes the duct on a moving direction side of the head unit when the head unit reciprocates.

  An inkjet printing apparatus that has a head unit and performs printing on a recording medium,
  The head unit is
  A recording head that ejects photocurable ink; and
  A head holding unit that has a duct and holds the recording head on a surface facing the recording medium;
  A light irradiation unit for irradiating light to the photocurable ink discharged from the recording head;
  With fans,
With
  The duct has a suction port formed on a surface facing the recording medium and a discharge port formed in a region where the fan sucks air.
  The said fan cools the said light irradiation part, and attracts | sucks the air in the said duct from the said discharge port, The inkjet printing apparatus characterized by the above-mentioned.