JPH01148522A - Method and apparatus for manufacturing filter-insert molded product - Google Patents

Abstract

PURPOSE:To make it possible to industrially profitably manufacture a filter- insert molded product by a method wherein a perforated filtering material is transferred to the predetermined position of one mold of a pair of injection molds and, after that mated to the other mold at another stage so as to form a cavity for molding the outer tubular part of a filter. CONSTITUTION:A turn table rotatable about a shaft 11, which is installed perpendicular to the plane of a base trestle 10, is provided on the trestle 10. And, at least two molds, each of which is one mold of two molds constituting a set of injection molds or a bottom force 13, are installed on the turn table 12 so as to be intermittently and alternately shaftable between a stage A and a stage B by pivoting the turn table 12. Further, on the trestle 10, a filtering material perforating and transferring device 14, (in the stage B), which controls a first process and a second process, and an injection molder 15 (in the stage A), which controls a third process to injection-mold synthetic resin, are arranged perpendicular to the plane of the base trestle 10 at respective separate positions. The stage A and the stage B are connected to each other by pivoting the turn table 12.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method and apparatus for manufacturing a filter molded article in which the outer circumferential portion of a filter material is joined to an outer cylindrical portion made of synthetic resin. For more details, see Food use.

The present invention relates to a rational manufacturing method and manufacturing apparatus for high-quality filter moldings used for medical instruments or physical and chemical applications.

<Prior art> Various types of filters are used depending on the application, such as liquid filtration in the food field, infusion filtration in the medical field, and chemical filtration in the physical and chemical field.
A molded filter is used in which the outer circumference of the filter material is joined to an outer cylinder made of synthetic resin. Especially in the medical field,
In the field of physics and chemistry, in order to prevent contamination from the outside and to ensure the safety of handlers, there is no direct contact with the filter material.
Furthermore, many disposable type filter moldings that are limited to one-time use and are not reused have been used.

By the way, conventionally, the manufacturing method of filter moldings used for such applications is to adhere the outer circumference of the filter material to a pre-formed cylindrical or annular filter outer cylinder using an adhesive. A method of creating a structure was adopted.

<Problems to be Solved by the Invention> However, this method of bonding the filter material to the pre-formed filter outer cylinder using an adhesive not only has low productivity and high cost, but also causes the possibility of contamination by foreign matter. However, it was not satisfactory in terms of hygiene, such as the elution of adhesives and solvents. In particular, in the case of small filter moldings such as those used for infusion filtration as medical devices, the work of gluing the filter material with adhesive is extremely difficult because the filter material and the filter outer cylinder to which the outer periphery is bonded are small. It was inevitable that it would be cumbersome and unhygienic.

In view of the current situation, it is an object of the present invention to provide a method for industrially advantageously manufacturing a sanitary, high-quality filter molded product, and a manufacturing apparatus used in the process.

<Means for Solving the Problems> For this reason, the present invention provides a method for manufacturing a filter molded article in which the outer periphery of the filter material is joined to an outer cylindrical portion made of synthetic resin. The first step of punching the filter material into a predetermined shape from the original fabric, and the second step of transferring the punched filter material to a predetermined position in one of a pair of injection molds are performed in succession, and then the filter material is transferred to a separate stage. in,
A cavity for molding the filter outer cylindrical part is formed by aligning one mold of the injection molding mold that has undergone the second step with the other mold, and the filter outer cylindrical part is molded by injection molding, and at the same time the outer periphery of the filter material is formed. Provided is a method for manufacturing a filter molded article, characterized by performing a third step of joining the filter molded article to an outer cylinder made of synthetic resin.

In addition, as for the equipment used when carrying out the above method, one mold of a pair of injection molding molds is installed on a rotatable turntable, while an original sheet of filter material is installed on one stage. A filter material punching/transfer device is provided for punching out a filter material into a predetermined shape and transferring the punched filter material to a predetermined position in one of the molds of the injection mold on a separate stage. Filter molding, characterized in that an injection molding machine is provided, which molds the filter outer cylindrical part and simultaneously joins the outer periphery of the filter material to the outer cylindrical part made of synthetic resin by providing the other mold that matches the one mold. Provide manufacturing equipment for products.

<Operation> According to the above method and apparatus, filter material is punched into a predetermined shape from a raw filter material in one stage, and then the punched filter material is continuously inserted into one of a pair of injection molding molds. The mold is transferred to a predetermined position in the mold, and on a separate stage, a cavity for molding the filter outer cylinder portion is formed by aligning the other mold with the one mold of the injection mold in which the punched filter material is set. It is now possible to mold the filter outer cylinder part by injection molding and at the same time join the outer peripheral part of the filter material to the outer cylinder part made of synthetic resin. A filter molded product can be obtained.

Filter materials used in manufacturing the filter molded product according to the present invention include cellulose-based, polyester-based,
Porous sheets or films manufactured from polyamide-based or polyolefin-based resins, non-woven fabric types, or materials laminated with other porous sheets or films on top of these are commonly used materials. A sheet or film is used.

Depending on the case, a paper or all-mesh one may be used.

Furthermore, as the synthetic resin forming the filter outer cylinder part, a synthetic resin that can be injection molded is used, and specific examples thereof include polyolefin, polystyrene, polyamide, polyester, and polycarbonate.

Note that the connection between the filter material and the injection-molded synthetic resin outer cylinder is achieved by an anchor effect in which the synthetic resin is inserted into the holes of the filter material by injection molding pressure, so it depends on the type of filter material and There are no particular restrictions on the selection and combination with the type of synthetic resin forming the outer cylindrical portion, and any combination may be used.

<Examples> Examples of the present invention will be described below based on the drawings, but the present invention is not limited to the following examples unless the gist thereof is exceeded.

FIG. 2 shows an example of a filter molded product manufactured according to the present invention, in which (a) is a sectional view of the filter molded product, and (b) is a cross-sectional view of the filter molded product.
) is its plan view.

In the figure, 1 is a filter material, 2 is a filter outer cylinder, and 3 is a joint between the filter material and the filter outer cylinder.

The filter material 1 and the filter outer cylinder part 2 are connected at the joint part 3,
The outer periphery of the filter material 1 is embedded in an outer cylinder 2 made of synthetic resin, and since the synthetic resin has entered the holes of the filter material 1 at this joint 3, the strength of the joint 3 is strong.

The outer side of the filter outer cylinder part 2 can be molded into various shapes depending on the use of the filter molded product; for example, FIG. 3 shows a tapered shape. In addition, the cross section may be polygonal. Further, the shape is not limited to a cylindrical shape, and may be formed in an annular shape.

FIG. 4 is an external view of an apparatus for manufacturing filter molded products according to the present invention, and FIG. 5 is a schematic plan view of the same apparatus.

In FIGS. 4 and 5, reference numeral 1o denotes a base mount for the entire apparatus, which is arranged so that its upper surface is parallel to the floor surface. A turntable 12 is provided which is rotatable around a vertically installed shaft 11. At least two molds, that is, lower molds 13, which constitute the injection mold are installed on the turntable 12, and these are arranged intermittently between the A stage and the B stage by rotating the turntable 12. It is said that it is possible to move alternately.

Also on the pedestal 10 are a filter material punching/transfer device 14 (B stage) that controls the first and second steps, and an injection molding machine 15 (A stage) that performs injection molding of synthetic resin that controls the third step.
A stage) is arranged perpendicularly to the plane of the base mount 10 at a position on each side, and the A stage and the B stage are connected to each other by rotation of the turntable 12.

The filter material punching/transfer device 14 punches out the filter material when the filter material is positioned on the same central axis as one of the pair of injection molds, that is, the lower mold 13 carried by the turntable 12. Filter material punching/transfer mold 16 for transferring the punched filter material to the lower mold 13
is equipped.

The injection molding machine 15 has a pair of molds that are used to manufacture a target filter molded product when the lower mold 13 of the injection mold carried by the turntable 12 is positioned on the same central axis. The other form of the injection mold, ie, the upper mold 17, is provided.

Reference numeral 18 denotes an arm of a product take-out robot for taking out the filter molded product and runner injection-molded in the A stage in the B stage. Rotate around the center.

Next, the filter material punching/transfer device 14 (B stage)
will be described in more detail with reference to FIGS. 6 to 8.

FIG. 6 is an enlarged view of the filter material punching and transferring device 14.

In FIG. 6, the filter material punching/transfer mold 16 is a lower mold for injection molding (
In this example, it is provided above the central axis of the core mold 13 and is held by a platen 20, which is arranged so as to be able to be driven up and down along tie bars 22, 22 by a drive ram 21.

23 is a filter material original fabric (hereinafter referred to as filter material fabric) supplied to the filter material punching/transfer mold 16;
24 is a roll of filter material, 25 is a tensioner,
Reference numeral 26 denotes a winding roll for the skeleton after punching out the filter material from the filter material.

Figures 7 and 8 show filter material punching/transfer mold 16.
FIG. 7 is an enlarged view showing the structure of the filter material, and FIG. 7 shows the state immediately before the filter material is punched, and FIG. 8 shows the punched filter material being transferred to the lower mold 13 for injection molding and the core pin of the lower mold 13 It shows the state where it is positioned at the tip.

To explain the filter material punching/transfer mold 16 in more detail, a male mold 29 for punching filter material is provided facing downward on a platen 20 that is driven up and down by a drive ram 21 via holding plates 27 and 28. . The tip of the male die 29 for punching out the filter material faces a hole in the holding plate 31 connected to the lower surface of the holding plate 28 by a spring 30, 30. A female plate 32 having a female die 33 for punching out the filter material 23 in cooperation with the male die 29 is provided below the holding plate 31. Incidentally, a suction hole 34 connected to a vacuum pressure source is opened at the tip end surface of the male die 29 for punching out the filter material.

The lower mold 13 for injection molding also includes a product ejection ring 36 surrounding the core pin 35 and for releasing the filter molded product.
A suction hole 37 connected to a vacuum pressure source is opened in the tip surface of the core pin 35.

Therefore, when the drive ram 21 descends, the holding plate 31 first presses the filter material 23 against the female plate 32, and then the downward pressure of the drive ram 21 is applied to the spring 30.
．． If it is better than 30, it is a male type 29 for punching filter material.
is fitted with the female die 33, and the filter material 1 is punched out into a predetermined shape from the filter original fabric 23. At the same time, by applying a vacuum to the suction hole 34 installed at the tip of the male die 29, the punched filter material 1 is cut out. While being suctioned and held on the tip of the male mold 29, the filter material 1 is transferred to the tip of the core pin 35 of the lower mold 13 for injection molding.

The lower mold 13 for injection molding holding the filter material 1 at the tip of the core pin 35 is then moved to the A stage by the rotation of the turntable 12.
To prevent the position of the filter material 1 from changing, vacuum is applied to the suction hole 37 installed in the core pin 35 of the lower mold 13 for injection molding, so that the filter material 1 can be held by suction. Further, in order to eliminate the influence of external forces such as wind on the filter material 1, it is preferable to rotate the turntable 12 while the product ejecting ring 36 of the lower mold 13 for injection molding is temporarily raised upward.

Next, with reference to FIGS. 1(a) to 1(e), an outline of the manufacturing process of the filter molded article will be described.

Figure 1(a) shows a lower injection mold (core mold in this example) 13 and an upper mold (cavity mold in this example) 1 at the A stage.
7 shows a state in which a molten synthetic resin is injected and filled into a cavity portion for forming a filter outer cylinder portion that includes the outer peripheral portion of the filter material 1.

FIG. 1(b) shows that after the upper mold for injection molding is opened, the injection molded filter molded product is moved to the B stage while being placed on the lower mold for injection molding 13 on the turntable 12. It shows the condition.

FIG. 1(C) shows that the filter molded product is the lower mold 13 for injection molding.
The product is released from the mold by the product ejection ring 36 and taken out by a product removal robot (not shown).

FIG. 1(d) shows that after that, the new filter material 1 held in the filter material punching male mold 29 incorporated in the transfer mold 16 is punched in the B stage, and the new filter material 1 is transferred to the lower mold 13 for injection molding. The state in which the core pin 35 is positioned is shown.

FIG. 1(e) shows that the lower mold 13 for injection molding in which the filter material 1 is set in the B stage is moved to the A stage by the rotation of the turntable 12, and is clamped with the upper mold 17 for injection molding. It shows the condition.

By repeating the above steps, a filter molded article can be manufactured.

In the above explanation, the dividing surfaces of the pair of injection molds are parallel to the floor surface, and one mold is the lower mold and the other mold is the upper mold. Needless to say, it is not necessary to be parallel to the floor surface, but may be perpendicular to the floor surface.

In order to make the present invention easier to understand, reference examples such as the shape of a filter molded article for carrying out the present invention will be described below.

(Reference example 1) 1) Shape of filter molded product: In Fig. 2, D = 10
nunφ, d=6mmφ, H=15mm2) Type of filter: Polyester non-woven fabric type, average particle size 0.2μ 3) Type of synthetic resin: Polypropylene (Reference example 2) 1) Shape of filter molded product: In Fig. 3, D+ −
4mmφ, D2 = 3.8mmφ, d=2mmφ,
H=3mm 2) Type of filter: Polyester nonwoven fabric type, average particle size 5μ 3) Type of synthetic resin: Polystyrene <Effects of the Invention> The present invention is as explained above, and has particularly remarkable effects as follows. Its industrial utility value is extremely large.

(1) When using the method of the present invention, since no adhesive is used, a high-quality filter molded article that does not elute harmful substances can be manufactured.

(2) When using the method of the present invention, by controlling the manufacturing process, a high-quality filter molded product with less contamination of foreign substances can be manufactured with industrial advantage.

(3) Therefore, the filter molded product obtained by the method of the present invention is suitable for use in disposable food, medical, physical and chemical applications, etc.

[Brief Description of the Drawings] Fig. 1 is a process diagram showing an outline of the manufacturing process of the filter molded product of the present invention, Fig. 2(a) is a sectional view showing an example of the filter molded product, and Fig. 2(b) is a plan view of the same figure (a), FIG. 3 is a sectional view showing another example of the filter molded product, FIG. 4 is a front view of the filter molded product manufacturing device, and FIG. 5 is a plan view of the same device. FIG. 6 is a front view of the filter material punching/transfer device, and FIGS. 7 and 8 are sectional views of the filter material punching/transfer mold shown in different operating states. 1... Filter material 2... Filter outer cylinder part 1
2... Turntable 13... Lower mold 14 of injection mold... Filter material punching/transfer device 1
5... Injection molding machine 14... Filter material punching/transfer mold 17... Upper mold of injection mold 20.
...Platen 23...Original fabric of filter material 29...
・Male die for punching filter material 31... Holding plate 32... Female plate 33...
Female type patent applicant Mitsubishi Monsando Kasei Co., Ltd. Agent Patent attorney Sasajima Fujio Prefecture Seiga - , Ω (N1'''')釆°′

Claims (4)

[Claims] (1) In a method for manufacturing a filter molded article in which the outer circumference of the filter material is joined to an outer cylinder made of synthetic resin, the first step includes punching the filter material into a predetermined shape from the original filter material in one stage; , and a second step of transferring the punched filter material to a predetermined position in one of a pair of injection molds, and in a separate stage, transfer the punched filter material to a predetermined position in one of a pair of injection molds. One mold is fitted with the other mold to form a cavity for molding the filter outer cylinder part, the filter outer cylinder part is molded by injection molding, and at the same time the outer peripheral part of the filter material is joined to the synthetic resin outer cylinder part. A method for manufacturing a filter molded product, characterized by performing three steps. (2) At least two molds of one of a pair of injection molds are placed on a rotatable turntable, and the turntable is intermittently rotated. 2. The method of manufacturing a filter molded article according to claim 1, wherein the step and the third step are performed in separate stages. (3) On one stage, a male die and a female die for punching out the original filter material are placed facing one die of a pair of injection molds, and the male die is inserted into the female die. - By passing the filter material through and punching it out, and then transferring it to a predetermined position in one of a pair of injection molds while holding the punched out filter material with the tip of the male mold,
2. The method of manufacturing a filter molded article according to claim 1, wherein the first step and the second step are performed continuously. (4) In an apparatus for manufacturing a filter molded product in which the outer periphery of the filter material is joined to an outer cylinder made of synthetic resin, one of a pair of injection molds is mounted on a rotatable turntable. , one stage is provided with a filter material punching/transfer device that punches filter material into a predetermined shape from an original filter material and transfers the punched filter material to a predetermined position in one of the molds for injection molding. , Injection molding in which the other mold of the injection molding mold is provided in a separate stage to match the one mold, and the outer cylindrical part of the filter is molded, and at the same time the outer peripheral part of the filter material is joined to the outer cylindrical part made of synthetic resin. 1. An apparatus for manufacturing a filter molded product, characterized in that it is configured as a filter molded product.