JP2002127259A - Method for manufacturing case with filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a case with a filter which can mold a case containing a filter in the same mold by molding a filter having an opening in its center and a case in the same mold and bonding inner and outer circumferences of the case and the filter. SOLUTION: A case has a two partition structure comprising two half-cut molded items X and Y. Mesh cloth to become a main body of a filter c is cut into a predetermined shape in a mold and the cut mesh cloth is secured to the inner side of the half-cut molded item X molded in a movable mold. Another half-cut molded item Y molded in a slide mold is slidden with the slide mold to position the half-cut molded item X molded in the movable mold and the half-cut molded item Y molded in the slide mold at a position where they match each other when the molds are clamped and then the movable mold and the slide mold are clamped. In the secondary molding process a resin to be filled is filled in a portion of the inner and outer circumferences where two half-cut molded items X and Y contact each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water purifying cartridge in which a case is divided into two layers (a structure in which raw water is injected on one side and purified water is discharged on the other), and a filter is provided inside the case. The present invention relates to a method of manufacturing a case body with a filter including the above.

[0002]

2. Description of the Related Art Conventionally, when a filter having an opening at the center is incorporated into a case body, the case body is formed by itself, the filter is formed by itself, and both formed separately are combined. A method of joining by secondary processing such as sonic welding is generally known.

[0003] In addition, a case body is formed by combining two half-molded bodies, and after forming the two half-molded bodies by primary molding, another part such as a filter formed in another step is replaced with the primary part. Patent Document 25 discloses a method of inserting between two molded halves, fixing a separate part by secondary molding, and joining the two primary molded halves together.
No. 95135 and Japanese Patent No. 2547182.

[0004]

However, in the above-mentioned conventional example, the filter must be formed in another process such as a separate mold, and a filter-like case body cannot be manufactured by the same mold. There is a problem of poor sex. In the case of a filter having no opening at the center, the above method can be used because only the outer periphery of the filter needs to be joined to the case body. However, when the filter has an opening at the center, only the outer periphery of the filter is used. However, there is a problem that the inner peripheral portion must be joined to the case body and cannot be manufactured by the above method.

SUMMARY OF THE INVENTION The present invention has been made in view of the above description, and has a filter formed by molding a filter having an open center and a case body with the same mold and joining the case body and the inner and outer peripheries of the filter. It is an object of the present invention to provide a method of manufacturing a case body with a filter, which can mold a case body containing the same with the same mold.

[0006]

According to the present invention, there is provided a method of manufacturing a case body with a filter, the method comprising:
The case body has a two-part structure composed of two half-molded bodies, and a mesh cloth serving as a filter body is cut into a predetermined shape in a mold, and the cut mesh cloth is formed into a movable mold. The other half molded body fixed to the body and molded into a slide mold is slid together with the slide mold, and the other half molded body molded into a movable mold and the other half molded molded into a slide mold The body and the movable mold and the slide mold are clamped in accordance with the position matching when the mold is clamped, and then the inner periphery where the two half-molded bodies are in contact with the resin to be secondarily filled in the secondary molding and It is characterized by filling the outer peripheral portion and joining them.
By manufacturing in this manner, two half-molded bodies can be formed with the same mold and a filter can be provided on one half-molded body. Can be assembled by joining the filter, and the case body with the filter can be manufactured with the same mold to improve the productivity. A case body can be manufactured.

[0007] In addition, the joining of the two half-molded bodies with the resin to be secondary-filled is performed through a secondary-resin flow path formed by a combination of a movable mold and a slide mold during the primary molding. It is also preferable that the inner and outer peripheries where the split molded bodies are in contact with each other are filled with a resin and the both are joined. In this way, the resin to be secondary-molded can be easily turned around the inner and outer circumferences of the filter, and the case body can be joined at the inner and outer circumferences of the filter.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The method for manufacturing a case with a filter according to the present invention is for manufacturing a case including a filter having an open central portion as shown in FIG. The case body is divided into an inner layer portion a and an outer layer portion b, and the space therebetween is separated by a filter c with a mesh. The filter c has an opening d in the center, and is joined to a half molded body X corresponding to the main body of the case body and a half molded body Y corresponding to the head part of the case body, respectively. . The filter c is joined at a joint between an inner peripheral portion e which is an open side and an outer peripheral portion f located on the outer peripheral side of the filter c.

The above-mentioned case body with a filter is manufactured as follows using the same molding die in the order shown in FIGS. In the molding die, reference numeral 1 denotes a movable mold, which is attached to a movable mold plate. Reference numeral 2 denotes a slide type, which is slidably attached to a fixed die plate in the vertical direction in the figure.
The movable die 1 is provided with a mesh retainer 3, an inner peripheral flow path core 4, an outer peripheral punch 5, an inner peripheral punch 6, a filter retainer 8, and the like. The slide die 2 is provided with a filter holder 9, an inner peripheral punch receiver 10, and the like.

First, as shown in FIG. 2A, the movable mold 1 is brought close to the slide mold 2 while the mesh cloth 7 serving as the main body of the filter is pressed by the spring-pressed mesh retainer 3 of the movable mold 1. Mold. Then, Figure 2
As shown in (b), the filter holders 8 and 9 of the movable mold 1 and the slide mold 2 come into contact with the mesh cloth 7. Then, a state as shown in FIG. 3 is obtained in a state where the mold clamping is completed.
When the spring-biased filter holder 9 of the slide mold 2 exceeds a predetermined holding force with respect to the state of FIG. 2B, the filter holder 9 moves in the direction of the arrow in FIG. 3 to complete the mold clamping. .

The inner peripheral punch 6 is advanced from the state shown in FIG. 3 as shown in FIG. 4, and the inner peripheral portion of the mesh cloth 7 held as described above is cut. At this time, the cutting by the inner peripheral punch 6 is performed by the inner peripheral punch 6 and the inner peripheral punch receiver 1 which is biased by a spring.
0, the mesh cloth 7 is sandwiched with a predetermined pressing force. Next, as shown in FIG. 5, the outer peripheral punch 5 is advanced to cut the outer peripheral side of the mesh cloth 7 held as described above, and the inner peripheral channel core 4 formed of the same block is advanced. Further, in this state, a flow path for flowing a resin for secondary molding, which will be described later, to the half molded body Y of the slide mold 2 is formed by a combination of the inner peripheral flow path core 4 and a part of the slide mold 2. It should be noted that the inner peripheral punch 6 that has been advanced is held in that state.

In the state shown in FIG. 5, a resin for primary molding is filled in a cavity surrounded by the movable mold 1, the slide mold 2, the outer punch 5, the inner punch 6, the filter holders 8, 9 and the inner flow path core 4. As shown in FIG. 6, a half molded body X to be a main body is formed, and a filter c with a mesh is integrally formed on the half molded body X. As shown in FIG. 6, the half molded body X is molded by primary molding, and then the mold is opened. FIG. 7 shows the initial stage of the mold opening after the end of the primary molding. First, the inner peripheral flow path core 4 and the outer peripheral punch 5 forming the cavity of the half molded body X corresponding to the main body.
To the initial position. FIG. 8 shows a state in which the mold opening has been completed, and the unnecessary mesh cloth 1 cut at this time.
1 is being discharged. The inner peripheral punch 6 is opened while maintaining the forward state. In addition, mesh holding 3,
The filter holder 9 and the inner peripheral punch receiver 10 are returned by the spring force.

As shown in FIG. 8, the slide mold 2 is moved upward from the state in which the mold opening is completed, and the state shown in FIGS. 9B and 10 is obtained. 9 (b) and FIG. 10 show a half molded body Y corresponding to the other head part primarily molded on the slide mold 2.
Shows a state in which the cavity in which is molded is moved to a position where a half molded body X corresponding to the main body of the movable mold 1 is held.

By the way, when the half molded body Y corresponding to the head portion is primarily molded in one cavity between the movable mold 1 and the slide mold 2 in the state of FIG. Primary molding is performed in the other cavity between the movable mold 1 and the slide mold 2. In FIG. 9, reference numeral 21 denotes a movable plate on which the movable die 1 is mounted; 22, a fixed die plate on which the slide die 2 is slidably mounted; 23, a driving source such as a driving cylinder for driving the inner peripheral punch 6; A driving source 25 such as a driving cylinder for driving the presser 8, and a driving source 25 such as a driving cylinder for driving the inner peripheral flow path core 4 and the outer peripheral punch 5. Reference numeral 26 denotes a filling passage for filling the cavity forming the half molded body X with the resin, and 27 denotes a filling passage for filling the cavity forming the half molded body Y with the resin.
Reference numeral 8 denotes a filling passage for filling a resin for secondary molding described later. Then, after the halved molded body X and the halved molded body Y are primarily formed and the mold is opened, the slide mold 2 is moved and FIG.
(B) As shown in FIG. 10 and FIG. 10, the half molded body X and the half molded body Y are made to correspond to each other, the movable mold 1 is moved from this state, the mold is clamped, and the secondary molding resin 12 is filled. Secondary molding.

FIG. 11 shows a state in which the mold has been clamped after the movement of the half-piece molded body Y corresponding to the head portion has been completed, and the secondary molding has been completed. At this time, the secondary molding resin 12 passes through the flow path formed by the inner peripheral flow path core 4 and a part of the slide mold 2 and is filled into the half-molded body Y corresponding to the head part on the slide mold 2 side. Thus, the half molded body X and the half molded body Y are joined. The inner peripheral punch 6 which has been advanced in the previous step has a half-formed body Y, a part of which corresponds to the head portion.
And has a role of forming a part of a flow path for flowing the secondary molding resin 12 to the half molded body Y corresponding to the head portion. Further, in order to prevent the molded product from being damaged by the tip of the inner peripheral punch 6 when the inner peripheral punch 6 enters the half molded body Y corresponding to the head portion, the inner peripheral punch 6 of the half molded body Y corresponding to the head portion is prevented. A stopper 16 for increasing the diameter of the portion where the gas enters, and for preventing the secondary molding resin 12 from leaking into the hollow portion 15 is provided in the half molded body X corresponding to the head portion.

By performing the secondary molding as described above, the half molded body X and the half molded body Y are joined, and the inner and outer peripheries of the filter c are joined to the half molded body Y. A product as a body is formed, the mold is opened so as to separate the movable mold 1 from the slide mold 2, and the product is taken out. FIG. 12 shows a state in which the product is taken out after the mold is opened. The removal is performed by knocking out the ridge Z of the filter c with the filter holder 8 on the movable mold 1 side. The ridge Z of the filter c is a portion which is added for the purpose of holding down the mesh so that it is not loosened or wrinkled and for the purpose of a resin subrunner.

FIG. 13 shows the structure of a metal mold having no opening at the center of the filter c included therein. That is, in FIG. 1, the outer layer portion b passes through the inner layer portion a.
In the case of having a double filter role of passing the filter c at the center when passing through the mold, the mold can be formed by a mold structure as shown in FIG. Fig. 1 Mold structure
As shown in FIG. 3, an inner core 6 'is used in place of the inner punch 6, and the inner core 6' is pushed in such a manner that the inner periphery of the mesh cloth 7 is not cut by the inner core 6 ', and the inner core 6' is cut in half. The secondary molding resin 12 is filled as a part of the flow path for flowing the resin into the split molded body Y, and the half molded bodies X and Y and the filter c are filled.
Are joined to each other.

Next, a method of joining the inner peripheral portion e of the filter c and the half-piece molded bodies X and Y will be described in more detail. As shown in FIG. 1, in order to join the inner peripheral portion e of the filter c whose central portion is open, the secondary molding resin 12 is used at the time of the secondary molding, the outer peripheral portion f, the inner peripheral portion e of the filter c, and the head portion. Needs to flow to the inner peripheral portion e of the half-molded body Y corresponding to

Therefore, in the primary molding, when the half molded body X corresponding to the main body to which the filter c is fixed is molded, as shown in FIGS.
Moves forward together with the outer peripheral punch 5 which advances to cut the outer peripheral portion of the mesh cloth 7, and as shown in FIG. As shown in FIG. 14C, the cavity surrounded by the slide die 2, the outer punch 5, the inner punch 6, the filter holders 8, 9 and the inner core 4 is filled with a resin for primary molding. Half molded body X to be the main body
Is formed and the filter c with mesh is integrally formed with the half molded body X, and the secondary resin flow path 13 is formed at the tip of the inner peripheral flow path core 4 as shown in FIG. . As a result, when the secondary molding is performed, the secondary molding resin 12 flows from the outer peripheral portion f to the inner peripheral portion e through the secondary resin flow path 13, and as shown in FIG. The halved compact Y is joined, and the inner and outer peripheries of the filter c are joined to the halved compact Y. FIG. 14 (a)
Indicates a state in which the mold is clamped and the mesh retainer 8 is in contact as shown in FIG. FIG. 14B shows FIG.
5 shows a state before the primary molding after the inner peripheral flow path core 4 further advances as shown in FIG.

FIG. 14 shows the state after the secondary molding.
(D). As shown in FIG. 14D, a connection groove 14 is provided in the half-molded body Y corresponding to the head portion in the circumferential direction. The next molding resin 12 flows into the connection groove 14 and is joined. At this time, the secondary molding resin is formed on the entire circumference of the circumferential portion despite the fact that the location of the secondary molding resin 12 flowing into the inner peripheral portion of the half-molded product Y corresponding to the head portion is small due to the joining groove 14. 12 can be flown and joined.

[0021]

According to the first aspect of the present invention, the case body has a two-part structure composed of two half molded bodies, and the mesh cloth serving as the main body of the filter is cut into a predetermined shape in the mold and cut. The fixed mesh cloth is fixed to one half of the movable mold, and the other half of the slide mold is slid together with the slide mold to form the other half of the movable mold. The movable body and the slide mold are clamped so that the molded body and the other half molded body molded into the slide mold match when the mold is closed, and then the secondary filling is performed by secondary molding. 2 resin
Since the two inner halves are filled with the inner and outer portions where the two halves are in contact with each other and joined together, it is possible to form two halves with the same mold and provide a filter on one of the halves. In addition, the two mold halves and the filter can be joined and assembled with the same mold, and the case body with the filter can be manufactured with the same mold to improve the productivity. It is possible to manufacture a case body with a filter in which the inner and outer peripheries of a filter having an opening are joined to the case body.

[0022] The invention of claim 2 of the present invention is based on claim 1.
In the above, the joining of the two halved molded bodies with the resin to be secondarily filled is performed through a secondary resin flow path formed by a combination of a movable mold and a slide mold at the time of the primary molding, thereby forming the halved molded body. Since the inner and outer circumferences where the bodies are in contact with each other are filled with resin and joined together, the resin to be secondary-molded can be easily rotated around the inner and outer circumferences of the filter, and the case body can be joined at the inner and outer circumferences of the filter. is there.

[Brief description of the drawings]

1A and 1B show a case body with a filter manufactured by a manufacturing method of the present invention, wherein FIG.
(B) is a sectional view taken along line AA of (a).

FIGS. 2A and 2B are cross-sectional views illustrating steps of a manufacturing method according to the first embodiment;

FIG. 3 is a sectional view showing a step of the manufacturing method according to the first embodiment;

FIG. 4 is a sectional view showing a step of the manufacturing method according to the first embodiment;

FIG. 5 is a sectional view showing a step of the manufacturing method according to the first embodiment;

FIG. 6 is a sectional view showing a step of the manufacturing method according to the first embodiment;

FIG. 7 is a sectional view showing a step of the manufacturing method according to the embodiment.

FIG. 8 is a sectional view showing a step of the manufacturing method according to the embodiment.

FIGS. 9A and 9B are cross-sectional views illustrating steps of a manufacturing method according to the first embodiment.

FIG. 10 is an enlarged sectional view of a main part of FIG. 9 (b).

FIG. 11 is a cross-sectional view showing a step of the manufacturing method according to the embodiment.

12A is a cross-sectional view showing a step of the manufacturing method according to the embodiment, FIG. 12B is a cross-sectional view showing a state of the filter in the step of FIG. FIG. 6 is a partially omitted front view showing the state of FIG.

FIG. 13 is a sectional view showing a step of another manufacturing method according to the embodiment.

14A is an enlarged perspective view of a main part in a state of FIG. 2B, FIG. 14B is an enlarged perspective view of a main part in a state of FIG. 5, and FIG. FIG. 4D is a partially cutaway perspective view showing a half-molded body and a filter on the main body side, and FIG. 4D is a partially cutaway perspective view showing the half-molded body and a filter for explaining a filling state of a secondary molding resin. is there.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Movable type 2 Slide type 3 Mesh holder 4 Inner peripheral channel core 5 Outer peripheral punch 6 Inner peripheral punch 7 Mesh cloth 8 Filter retainer 9 Filter retainer 10 Inner peripheral punch receptacle 12 Secondary molding resin 13 Secondary resin channel

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) // B29L 31:14 B29L 31:14 F term (Reference) 4D064 AA17 BJ07 CD01 EA01 4F202 AD16 AD17 AH03 CA11 CB01 CB12 CB21 CK35 CK52 CK75 CK84 CK90 CQ01 CQ07 4F206 AD16 AD17 AH03 JA07 JB12 JB21 JN12 JQ81 4F211 AD05 AD17 AG07 AG20 AH03 TA08 TC08 TC14 TD07 TD13 TH01 TH02 TH19 TN82 TN87

Claims (2)

[Claims] 1. A method of molding a case body including a filter having an open central portion, wherein the case body has a two-part structure composed of two half molded bodies, and a mesh cloth serving as a main body of the filter has a predetermined shape in a mold. And the cut mesh cloth is fixed in one half molded body to be formed into a movable mold, and the other half molded body formed into a slide mold is slid together with a slide mold to form a movable mold. The movable mold and the slide mold are clamped so that the other half molded body and the other half molded body formed in the slide mold are aligned with each other when the mold is clamped, and then the secondary molding is performed. A method of manufacturing a case body with a filter, characterized in that a resin to be secondarily filled is filled into inner and outer peripheral portions where two half-shaped molded bodies are in contact with each other, and the two are joined together. 2. A method of joining two halved molded bodies with a resin to be secondary-filled through a secondary resin flow path formed by a combination of a movable mold and a slide mold at the time of primary molding. 2. The method for manufacturing a case body with a filter according to claim 1, wherein a resin is filled into an inner circumference and an outer circumference where the half molded bodies are in contact with each other and the two are joined together.