JP6559857B1 - Filter device - Google Patents

Abstract

[PROBLEMS] To provide a filter device that is not affected by the type of ink and that can ensure a stable sealing property at a housing portion and is low in cost and high in productivity, a method for manufacturing the filter device, and an ink jet using the filter device Provide a printer. The liquid outflow side primary molded body 2 and the liquid inflow side primary molded body 3 are preliminarily heated to a constant temperature after being placed in a thermostatic chamber maintained at 50 to 80 ° C. Formed by the liquid outflow side primary molded body 2 and the liquid inflow side primary molded body 3 with the peripheral edge of the filter member 4 sandwiched between the side primary molded body 2 and the liquid inflow side primary molded body 3. The resin is injected and filled into the cavity 12 for forming the secondary molded part 5 to form the secondary molded part 5, and the liquid outflow side primary molded body 2 and the liquid inflow side primary molded body 3 are formed into the secondary molded part 5. A method for manufacturing the filter device 1, wherein the filter device 1 is fused and integrated in a watertight manner. [Selection] Figure 4

Description

  The present invention relates to, for example, a filter device provided in the middle of a liquid flow path and used to filter a liquid flowing in the liquid flow path, a manufacturing method thereof, and an ink jet printer using the filter device.

Ink jet printers are provided with a filter device in the middle of an ink supply path from an ink tank to a printer head (Patent Documents 1 and 2).
As shown in FIG. 14, the conventional filter device 100 includes an ink inflow side member 200, an ink outflow side member 300, a filter member 400, and two O-rings (rubber packing) 500.

  And this filter apparatus 100 fixes the periphery of the filter member 400 by the two O-rings 500 by fixing the ink inflow side member 200 and the ink outflow side member 300 in a closed state with bolts 600 and nuts 700. The part is designed to be sandwiched watertight.

Japanese Patent Laid-Open No. 2001-253083 Japanese Patent No. 2992754

However, in order to print high-definition images, inkjet printers not only have a structure of the printer itself, but also the materials of inks are evolving day by day, and the types thereof are becoming various.
Therefore, depending on the material of the O-ring, the O-ring 500 may be corroded due to the influence of the ink component, and the ink may leak out of the housing of the filter device 100.

The present invention is, in view of the above circumstances, without being affected by the ink type, and it is possible to secure a stable sealing property in the housing portion, and its object is to provide a good filter equipment productivity at low cost.

  In view of the above circumstances, the present invention is a filter device that is not affected by the ink type and that can secure a stable sealing property at the housing portion and that is low in cost and good in productivity, a method for manufacturing the filter device, and An object of the present invention is to provide an ink jet printer using the filter device.

In order to achieve the above object, a filter device according to the present invention (hereinafter referred to as “filter device of the present invention”) has a hollow portion, and has a liquid inlet and a liquid outlet to the hollow portion. And a filter member provided so as to partition the hollow portion between the liquid inlet side and the liquid outlet side, and the housing includes a first primary provided with the liquid inlet. A molding part, a second primary molding part provided with the liquid outlet, and a secondary molding part, wherein the first primary molding part and the second primary molding part are part of the hollow part. Are combined with the state of forming the hollow portion with the peripheral edge of the filter member sandwiched therebetween, and in this combined state, the cavity of the secondary molding portion is formed. Equipped with cavity forming recesses The secondary molded part is a filter device in which the cavity is filled and fused with both primary molded parts at the interface, wherein the first primary molded part and the second primary molded part Are combined so as to directly sandwich the peripheral edge of the filter member in a state where the filter member and the cavity are separated from each other, and the second primary molding portion protrudes from the bottom of the hollow portion forming recess. Rutotomoni a filter member supporting part for supporting the bottom surface of said filter member, said first primary molding section and the second primary molding section, a fixing rib which bites into the filter member to the nip It is characterized by having.

  The method for manufacturing a filter device according to the present invention includes a first resin molded body serving as the first primary molded portion and a second resin molded body serving as a second primary molded portion, which are molded in advance. The secondary molding is performed in the cavity formed by the step of housing the peripheral portion in a combined state sandwiched between both resin molded bodies, and housing the mold in the mold, and the first resin molded body and the second resin molded body. It is characterized by comprising a step of injecting and filling a resin as a part.

The manufacturing method of the filter device of the present invention is not particularly limited, but before the resin to be the secondary molded portion is injected and filled into the cavity, the first resin molded body and the second resin molded body are It is preferable to include a step of preheating at least the cavity forming surface.
That is, when the resin to be the secondary molded portion is filled in the cavity by preheating, at least the cavity forming surfaces of the first resin molded body and the second resin molded body are heated by the heat of the filled resin. Melts quickly.
Therefore, fusion can be performed smoothly and the two resin moldings can be integrated with high accuracy by the secondary molding portion.

Filter apparatus of the present invention are, for example, Ru incorporated in the ink flow path between the ink tank and the print head, it may be used for purposes other than the ink jet printers.

In the present invention, the resin forming the primary molded part is not particularly limited, and examples thereof include polybutylene terephthalate (PBT), polyphenylene sulfide (PPS), and polyacetal (POM).
The resin that forms the secondary molded part is not particularly limited as long as it is compatible with the resin that forms the primary molded part and can be firmly fused with the primary molded part, and the resin that forms the primary molded part. The same kind may be sufficient.
In addition, you may make it add suitably known additives, such as reinforcement fibers, such as glass fiber, and a pigment, to the said resin as needed.

  The filter member is not particularly limited. For example, a mesh body made of a metal wire such as a stainless steel wire or a synthetic resin wire such as polyamide, a plate material provided with a large number of small filter holes by etching a stainless steel plate, a stainless steel fiber (For example, a brand name Naslon filter manufactured by Nippon Seisen Co., Ltd.) and the like. Among these, a sintered body of stainless steel fibers is preferable from the viewpoint of strength and corrosion resistance.

In the filter device manufacturing method of the present invention, the preheating temperature of the first resin molded body and the second resin molded body is a temperature at which the resin molded body is not deformed when the resin molded body is set in a mold. Although it is preferable to make the temperature as high as possible, 50-80 ° C is practical if the operator manually sets the resin molding in the mold.
Although it does not specifically limit as a preheating method, The method of accommodating until the resin molded body used as the primary molding part shape | molded previously becomes constant temperature in the thermostat kept at predetermined temperature, The said resin molded body is conveyed by a conveyance means. A method in which a tunnel-shaped heating furnace is provided in the middle and the resin molded body is heated to a predetermined temperature while the resin molded body moves through the heating furnace, and the inner wall surface of the cavity forming recess of the resin molded body is heated by heat from a heater or the like. Is mentioned.

As described above, the filter device of the present invention has a hollow portion, a resin housing having a liquid inlet and a liquid outlet to the hollow portion, the hollow portion on the liquid inlet side, a liquid A filter member provided so as to be partitioned from the outlet side, wherein the housing is provided with a first primary molding part provided with the liquid inlet and a second primary molding part provided with the liquid outlet; And a secondary molded part, wherein the first primary molded part and the second primary molded part each have a hollow part forming concave part that forms a part of the hollow part, and the periphery of the filter member In a state in which the hollow portion is formed in a state where the portion is sandwiched, and in this combined state, a cavity forming concave portion that forms a cavity of the secondary molding portion is provided, and the secondary molding portion is provided in the cavity. Filled with both primary molding The filter device is in a state of being fused at the interface, wherein the first primary molded portion and the second primary molded portion isolate the gap between the filter member and the cavity. The second primary molded portion is combined so as to directly sandwich the peripheral edge of the member, and includes a filter member supporting portion that protrudes from the bottom of the hollow portion forming recess and supports the bottom surface of the filter member. In addition, since the first primary molding portion and the second primary molding portion are provided with fixing ribs that bite into the filter member in the sandwiching portion, it is not necessary to use a sealing material such as an O-ring.
Therefore, it is not affected by the ink type, and a stable sealing property can be secured at the housing portion, and the productivity is low and the productivity is good.

It is a top view showing one embodiment of a filter device of the present invention. It is a front view of the filter apparatus of FIG. It is a left view of the filter apparatus of FIG. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is CC sectional drawing of FIG. It is DD sectional drawing of FIG. It is EE sectional drawing of FIG. It is FF sectional drawing of FIG. It is a principal part enlarged view of FIG. It is a top view of the 1st resin molding. It is a side view of the resin molding of FIG. It is a bottom view of the 2nd resin molding. It is sectional drawing of a well-known filter apparatus.

Hereinafter, the present invention will be described in detail with reference to the drawings showing embodiments thereof.
1 to 10 show a first embodiment of a filter device according to the present invention.

As shown in FIGS. 1 to 10, the filter device 1 includes a housing 10 and a filter member 4 constituting a filter.
As shown in FIG. 1, the housing 10 has a substantially square shape in plan view, and includes a hollow portion 11 partitioned through a filter member 4 as shown in FIGS. 4 to 10.

  That is, the housing 10 includes a liquid outflow side primary molded body 2 as a first resin molded body that becomes a first primary molded portion molded in advance, and a second resin molded body that becomes a second primary molded portion. The liquid inflow side primary molded body 3 is formed by being fused and fixed via the secondary molding portion 5 with the filter member 4 sandwiched therebetween, as will be described later.

The liquid outflow side primary molded body 2 communicates with the first hollow portion forming concave portion 21, the first cavity forming concave portion 28, and the first hollow portion forming concave portion 21 that constitute a part of the hollow portion 11, and FIG. 12, the liquid outlet 22 facing the outside of the housing 10, the two first gate holes 24, the two first vent holes 25, and two lines as shown in FIGS. 10 and 11. The first fixing rib 29 of the filter member 4 to be described later is provided.
Further, as shown in FIG. 11, the liquid outflow side primary molded body 2 is provided with a support column 23a of a filter member 4 described later at the center of the bottom of the first hollow portion forming recess 21, and the support column 23a is centered. In addition, six support ribs 23b project radially, and between the first cavity forming recess 28 and the first hollow portion forming recess 21, two fixing ribs 29 of the filter member 4 to be described later are provided. Is formed in a circle.

The two first gate holes 24 are formed so as to communicate with the first cavity forming recess 28 at a symmetrical position on one diagonal line across the square diagonal center of the housing 10.
The two first vent holes 25 are formed so as to communicate with the first cavity forming recess 28 at symmetrical positions on the other diagonal line across the diagonal center of the square of the housing 10.

The liquid inflow side primary molded body 3 communicates with the second hollow portion forming concave portion 31, the second cavity forming concave portion 38, and the second hollow portion forming concave portion 31 constituting the remaining portion of the hollow portion 11, as shown in FIG. It includes a extraordinary free liquid flow inlet 32 to the outside of the housing 10, and two second gate holes 34, the holes 35 for the two second vents.
In addition, the liquid inflow side primary molded body 3 is combined with the liquid outflow side primary molded body 2, and as shown in FIGS. 10 and 13, the two fixing ribs 29 of the liquid outflow side primary molded body 2 are formed. One second fixing rib 39 is formed in a circle shape at a position where it enters.

The two second gate holes 34 are formed to face the first gate hole 24 and communicate with the second cavity forming recess 38.
The two second vent holes 35 are formed to face the first vent hole 25 and communicate with the second cavity forming recess 38.

The filter member 4 is formed of a sintered body of stainless steel fibers, and as shown in FIG. 10, the peripheral edge portion is bitten by the first fixing rib 29 and the second fixing rib 39, respectively. It is in a state of being sandwiched between the outflow side primary molded body 2 and the liquid inflow side primary molded body 3.
As will be described later, the secondary molded portion 5 is injected and filled into the cavity 12 and integrated with the inner wall surfaces of the first cavity forming recess 28 and the second cavity forming recess 38 in a fused state.

And the said filter apparatus 1 can be manufactured as follows, for example.
(1) The liquid outflow side primary molded body 2 and the liquid inflow side primary molded body 3 to be the primary molding portion are molded in advance.
(2) The liquid outflow side primary molded body 2 and the liquid inflow side primary molded body 3 are put in a thermostatic chamber maintained at 50 to 80 ° C. and preheated until the temperature becomes constant.
(3) The liquid outflow side primary molded body 2 that has been preheated is set on a fixed die (not shown) of the mold, and the filter member 4 is supported at a predetermined position of the liquid outflow side primary molded body 2.
(4) After setting the liquid inflow side primary molded body 3 that has been preheated to a movable mold (not shown), the mold is closed, the liquid outflow side primary molded body 2, the liquid inflow side primary molded body 3, After the peripheral portion of the filter member 4 is sandwiched between the two gates (not shown) provided at positions facing the two second gate holes 34 of the liquid inflow side primary molded body 3 of the mold. The resin is injected and filled into the cavity 12 through the above-mentioned method, and the secondary molding part 5 is molded.

As described above, after the filter device 1 sandwiches the peripheral portion of the filter member 4 between the liquid outflow side primary molded body 2 and the liquid inflow side primary molded body 3 which are primary molded bodies constituting the primary molded portion, Since the resin that becomes the secondary molded portion 5 is injected and filled in the cavity 12 formed by the liquid outflow side primary molded body 2 and the liquid inflow side primary molded body 3, the secondary molded portion 5 is molded. The next molding part 5, the liquid outflow side primary molded body 2 and the liquid inflow side primary molded body 3 are fusion-bonded in a watertight manner at the interface.
Accordingly, a sealing material such as an O-ring becomes unnecessary, and the problem that the sealing material deteriorates due to the influence of ink and a sealing failure occurs is eliminated.

In addition, the liquid outflow side primary molded body 2 and the liquid inflow side primary molded body 3 which are primary molded bodies are preheated to a predetermined temperature in advance, then set in a mold, and the secondary molded portion 5 is injection molded. Therefore, the contact surface between the liquid outflow side primary molded body 2 and the injection resin of the liquid inflow side primary molded body 3 is uniformly melted by the heat of the injection resin.
Accordingly, the liquid outflow side primary molded body 2 and the liquid inflow side primary molded body 3 are easily fused to the secondary molded portion 5 at the interface, and a watertight fixed state can be reliably obtained over the entire interface. .
In addition, O-ring setting and bolt tightening work are eliminated, and productivity is improved.

The present invention is not limited to the above embodiment. For example, in the above embodiment, the resin is injected and filled from two gates, but one gate may be used.
In the above embodiment, the liquid outflow side primary molded body and the entire liquid inflow side primary molded body are preheated in the temperature-controlled room. It doesn't matter.

  In the above embodiment, the housing is substantially square in plan view, but the shape is not particularly limited, such as a circle or a polygon.

DESCRIPTION OF SYMBOLS 1 Filter apparatus 10 Housing 11 Hollow part 12 Cavity 2 Liquid outflow side primary molded object (1st resin molded object used as the 1st primary molded part)
21 1st hollow part formation recessed part 22 Liquid outlet 23a Support pillar 23b Support rib 24 1st gate hole 25 1st vent hole 28 1st cavity formation recessed part 29 1st fixing rib 3 Liquid inflow side primary molded object ( Second resin molded body to be the second primary molded part)
31 Second hollow portion forming recess 32 Liquid inlet 34 Second gate hole 35 Second vent hole 38 Second cavity forming recess 39 Second fixing rib 4 Filter member 5 Secondary molding portion

Claims (2)

A resin-made housing having a hollow portion and having a liquid inlet and a liquid outlet to the hollow portion, and provided to partition the hollow portion between the liquid inlet side and the liquid outlet side. A filter member,
The housing has a first primary molding part provided with the liquid inlet, a second primary molding part provided with the liquid outlet, and a secondary molding part,
The first primary molding part and the second primary molding part each have a hollow part forming recess that forms a part of the hollow part, and the hollow part is sandwiched between the peripheral parts of the filter member. Combined with the state to form,
In this combined state, each comprises a cavity forming recess that forms the cavity of the secondary molding part,
The secondary molded part is a filter device that is filled in the cavity and is fused at the interface with both primary molded parts,
The first primary molded portion and the second primary molded portion are combined so as to directly sandwich the peripheral edge of the filter member in a state where the filter member and the cavity are separated from each other,
Said second primary molding section, Rutotomoni a filter member supporting part for supporting the bottom surface of projecting the filter member from the bottom of the hollow part forming the recess,
The filter device, wherein the first primary molding portion and the second primary molding portion include a fixing rib that bites into the filter member in the sandwiching portion . The filter device according to claim 1, wherein the filter member is a sintered body of stainless steel fibers .

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