JPS62111705A - Molding device - Google Patents

Abstract

PURPOSE:To secure safety of work by improving workability in pulling-out of a reinforcing material connecting member, by a method wherein protrusion of the reinforcing material connecting member through the external circumferential surface of a male mold and plunging-in of the same into the male mold are performed by a reciprocation mechanism and pulling-out of each of the reinforcing material connecting members from the reinforcing material is performed automatically after molding work. CONSTITUTION:A needle-shaped tip part 10a of each of reinforcing material connecting members 10 is thrusted out toward the external circumferential surface of a male mold 2 through a piercing hole 8 of each of guide bushings 9 by reciprocating a reciprocation mechanism 13. Then baggy lining 44 is held by the male mold 2 by piercing through the needle-shaped tip part 10a of each of the reinforcing material connecting member 10 toward an end part 44a by fitting the baggy lining 44, which is the reinforcing material, to the male mold 2. A molding cavity is formed by grinding the male mold 2 against a female mold 4 after that and a back B having lining 44 is molded on the cavity by casting a molding material R through a casting port 45. The needle- shaped tip part 10a of each of the reinforcing material connecting members 10 is plunged in within a piercing hole 8 of a guide bushing 9 by reciprocating a piston 16 by breaking the female mold 4 after molding.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a molding apparatus for obtaining a molded article having a reinforcing material on its inner surface.

(Prior art) Conventionally, as this device, the male mold was covered with a reinforcing material,
A female mold that surrounds the male mold and forms a cavity around the male mold is combined, and a synthetic resin is injected into the cavity by injection molding or injection molding to form a box-shaped, chest-shaped container or other shaped container. Molding apparatuses for forming molded articles are known. At this time, as a method for covering the reinforcing material on these male molds, there is a method of temporarily adhering the reinforcing material to the male mold using a temporary adhesive, wax, or water. In addition, when covering the entire surface of the inside of the male mold cavity with reinforcing material, make it into a bag and temporarily attach it using the above method.
Alternatively, the edge of the reinforcing material may be exposed outside the cavity and sandwiched between the mating surfaces of the male mold and the #& mold, or a bottle may be provided protruding from the surface of the male mold outside the cavity and the reinforcing material may be passed through the bottle. I was wearing temporary clothes.

(Problems to be Solved by the Invention) However, in these methods of temporarily attaching reinforcing materials to the male mold, the use of one pinch of adhesive may result in strong adhesion, making it difficult to remove the mold, or causing damage to the surface of the male mold. There were drawbacks such as the adhesive getting stuck and cleaning the male die requiring time and effort. In the case of wax, there are drawbacks such as the reinforcing material gets stained with wax and sticks to the surface of the male mold, making cleaning the male mold time-consuming. If water is used, the surface of the male mold may dry out if the molding process takes too long after temporary attachment, and the reinforcing material may slip off. In addition, water reacts with polyurethane raw materials, so there are other problems, such as that it cannot be used in urethane molded products.

In addition, the method of exposing the edge of the reinforcing material to the outside of the cavity and sandwiching the reinforcing material between the mating surfaces of the male and female molds involves holding the reinforcing material by hand while the @ mold is brought into contact with the male mold. This is a time-consuming work as the user has to keep his/her hands close to the mating surface, which is not preferable from the standpoint of work safety.

Furthermore, in the method of temporarily attaching the reinforcing material to a bottle provided on the surface of the male mold outside the cavity, the reinforcing material must be removed from the bottle one by one when removing the mold after molding, which is time-consuming and requires hands to remove the bottle. One worker was often bothered by the damage caused by the first touch.

An object of the present invention is to provide the above-mentioned molding apparatus which can eliminate the above-mentioned disadvantages.

(Means for Solving the Problems) A first aspect of the present invention provides a mold comprising a reinforcing material and a female mold surrounding the reinforcing material to form a cavity around the male mold; , a plurality of reinforcing material locking members protruding from the outer circumferential surface of the IS shape and pierced through the reinforcing material attached to the male mold, and immersed in the female mold after the molding operation and pulled out from the reinforcing material; and; disposed within the reinforcing member, reciprocating to cause each reinforcing member locking member to protrude to the outer peripheral surface of the male mold, and returning to cause each reinforcing member locking member to retract into the male mold. It is said to be equipped with a movable reciprocating motive groove;

A second aspect of the present invention provides a mold comprising a male mold and a female mold surrounding the male mold to form a cavity around the male mold; a plurality of reinforcing material locking members that are inserted into the core male mold and pulled out through the reinforcing material after the molding operation; a reciprocating mechanism that is provided and moves forward to cause each of the reinforcing material locking members to protrude to the outer circumferential surface of the male mold, and moves back to cause each of the reinforcing material locking members to sink into the mold; an on-off valve that is operated by the reciprocating mechanism to close an air outlet between the compressed air chamber in the male mold and the cavity when the mechanism moves forward, and opens the air outlet when the mechanism moves backward; It is characterized by having;

In the present invention, the reciprocating vA monument includes an air cylinder,
Hydraulic cylinders, electromagnetic cylinders, etc. can be conveniently used.

In the present invention, the position at which the reinforcing member locking member protrudes from the outer peripheral surface of the male die may be outside the cavity or may be inside the cavity. When provided in a cavity, it is preferable that the thickness of the molded product is thick and that the reinforcing material locking member and the male insertion hole into which the member is inserted are in close contact with each other.

The molding method that can be applied to the present invention may be any method as long as it involves molding, but the main methods include injection molding, injection molding, etc., and all synthetic non-fat materials commonly used for these moldings can be used. Can be used. Examples include styrene 1 resin, ethylene resin, vinyl chloride resin, urethane IN El, phenol resin, and these foamable resins alone or in combination.

In the present invention (the reinforcing material used varies depending on the molding method, the type of molded product, the molding resin, etc., but in general, it is preferable to use a flexible sheet-like material or a bag-like material made from this material. The material used is woven fabric. , non-woven fabrics, knitted fabrics, etc., as well as vinyl leather, synthetic leather, etc. made from these materials.

(effect) The effects of the first invention are as follows.

After the reciprocating mechanism is moved forward to project each reinforcing material locking member to the outer surface of the male mold, each reinforcing material locking member is passed through the reinforcing material attached to the male mold to hold the reinforcing material in the female mold. After the molding is completed, the reciprocating mechanism is moved back and each reinforcing material locking member is moved 1! This causes each reinforcement locking member to be pulled out from the reinforcement.

The operation of the second invention is as follows.

When the reciprocating mechanism is moved forward, each reinforcing member locking member protrudes to the outer peripheral surface of mold 4, so by passing each reinforcing member locking member through the reinforcing member attached to the male mold, the reinforcing member becomes male mold. At the same time, the air outlet is closed by the on-off valve, thereby preventing molding material from entering the compressed air chamber. On the other hand, when the reciprocating mechanism is moved back after the completion of molding, each reinforcing material locking member is immersed into the male mold and pulled out from the reinforcing material, so the retention of the reinforcing material against the male mold is released, and at the same time, the air outlet opens and closes. Since the valve is opened, compressed air is introduced between the male mold and the molded product, and the molded product is released from the female mold.

(Example) Example 1 In Example 1, the present invention was applied to a molding device for obtaining a waterproof seamless bag having a lining fabric, and as shown in FIG. 1, the mold 1 of the device was , a male mold 2 and a female mold 4 surrounding the male mold 2 to form a molding cavity 3 around the male mold 2. The female mold 4 may be made separable.

Inside the male mold 2, as shown in Fig. 2, there is a compressed air chamber 5 located in the center thereof, and a cylindrical reinforcing material locking member housing extending from the compressed air chamber 5 to the upper part of the male mold 2. A chamber 6 is formed. At the end of the storage chamber 6 opposite to the compressed air chamber 5, there are a plurality of rods extending at equal intervals on the circumference or at arbitrary positions away from the center line of the storage chamber 6. Slanted guide holes 7 are provided, the outer openings of which are located on the upper outer circumferential surface of the male mold 2 outside the molding cavity 3. A guide push-piece 9 having an insertion hole 8 in the axial direction is fitted into the outer opening of each inclined guide hole 7 .

A reinforcing material locking member 10 made of a steel wire such as a piano wire is inserted into the insertion hole 8 of each guide bushing 9, and its needle-like tip 10a is placed on the guide bush 9 side, and the proximal end 1ot
) is attached to the converging body 11 [in the storage chamber 6]. The converging body 11 is a reciprocating mechanism 1 fixed to the compressed air chamber 5.
3.

Note that there is a gap of 0.1 to 0.3 cm between the insertion hole 8 and the reinforcing material locking member 10.

The reciprocating mechanism 13 is composed of an air cylinder in the illustrated example, and includes a cylinder 15 attached to the side end wall of the storage chamber 6 of the compressed air chamber 5 via a sealing member 14, and the cylinder 15.
The inside is the first room C1 and the second room C! Piston 16 divided into
and a first chamber C1 protruding from one end surface of the piston 16.
a first piston rod l) that penetrates the end wall of the piston 16 and protrudes into the accommodation chamber 6;
A second pipe passes through the end wall of the chamber C2 and enters the compressed air chamber 5.
One piston rod and two. The first piston rod 1 is connected to a focusing body 11 via a connection αrad. At this time, although not shown, a universal joint may be used.

A compressed air passage 29 is formed in the male mold 2 and its attachment part 2 (Fig. 1) in parallel with the storage chamber 6, one end of which opens into the compressed air chamber 5, and the other end with an on-off valve 30 in the middle. It is connected to the compressor 9-34 via an interposed connecting pipe 311. The compressed air passage 29 also includes two first air pipes. A second conduit 321.32□ is inserted. Those conduits 321, 32
2 is connected to the first end of the reciprocating mechanism 13. Each is connected to the second chamber C1*C2, and the other end is connected to the switching valve 33.

The switching valve 33 is connected to a compressor 34 via connecting pipes 312, 31.

A compressed air chamber 5 is provided on the end wall of the compressed air chamber 5 on the ground bottom side in order to communicate between the compressed air chamber 5 and the bag molding cavity 3.
A tapered air outlet 35 is formed that widens from the side,
An on-off valve 36 for opening and closing the air outlet 35 is fitted into the air outlet 35. The second piston rod 172 is connected to the on-off valve 36 via the connecting rod 37. Furthermore, the second piston rod 17□ is a tension coil spring 40.
It is connected to the on-off valve 36 by.

Further, a liner may be provided on the inner circumferential surface of the storage shade 6 and the inclined guide hole. Furthermore, if the first chamber C1 and the storage chamber 6 are communicated with each other, the reinforcing material locking member 1o and the guide bar are connected.

It is possible to prevent scraps or fibers of the lining cloth 44 from getting caught between the sleeve 9 and the insertion hole 8.

Next, to explain the bag forming process, the reciprocating mechanism 1
The first chamber G of No. 3 is opened to the atmosphere, and compressed air is introduced into the second chamber C2 to move the piston 16 forward as shown by the solid line in FIG. The portion 1o is made to protrude from the insertion hole 8 of each guide 1%-9 to the outer peripheral surface of the male mold 2. Then, a stretchable bag-like lining fabric 44 made of stockinette or the like as a reinforcing material is attached to the male die 2, and the end portion 44 of the lining fabric 44 is attached to the male die 2.
The needle-like tip portion 10a of each reinforcing material locking member 10 is passed through the a side, and the lining cloth 44 is held by the male mold 2. On the other hand, since the air outlet 35 is closed by the on-off valve 36 which receives the tensile force of the tension coil spring 40, the bottom surface of the male mold 2 is flat.

Thereafter, the male die 2 and the female die 4 are rubbed together to form a molding cavity 3. In this case, an annular recess 50 is defined by the female mold ↓ around the needle-like tip 10a of each reinforcing material locking member 10, so that the female mold 4 will not interfere with the needle-like tip 10a. do not have. Then, the injection port 45 of the female mold 4 is placed in the cavity 3.
A bag B having a lining fabric 44 is molded by injecting a molding material R such as a vinyl chloride resin compound.

After molding, the female mold 4 is opened, and then the second chamber C? The piston 16 is opened to the atmosphere and compressed air is introduced into the first chamber C1.
The needle-shaped tip 10a of each reinforcing material locking member 1° is moved backward.
are pulled out through the lining cloth 44 and inserted into the insertion holes 8 of each guide bushing 9. In this way, the lining cloth 44 is attached to each needle-shaped tip 10a.
Since there is no need to remove it further, the risk of finger pricking is eliminated. At the same time, the first lever 37 moves the opening/closing valve 36 to open the air outlet 35.

Next, compressed air is supplied to the compressed air chamber 5 and introduced between the bag B and the male mold 2 through the air outlet 35, thereby inflating the bag B, releasing the tight contact between the bag B and the male mold 2, and releasing the bag B from the male mold 2. During work, remove bag B from male mold 2.

During demolding, when bag B is extracted from the male mold 2, bag B is usually in close contact with the female mold 2 and retains heat of 60 to 80°C. Although this is not good and is painful, if the bag B is released from the male mold 2 using compressed air as described above, the mold removal work can be easily performed and the pain associated with the work can be eliminated.

As shown in FIG. 3, the obtained waterproof, grain-free bag B has a core plate 51 inserted into the inner surface of the bottom, adhesively and fixed as necessary, and a covering sheet 53 sewn to the mouth edge 52. Pigeon 5
4 are provided in a single layer, and a string 55 is passed through the eyelet 54 to complete the process.

Example 2 Next, the present invention is actually applied to a molding apparatus for obtaining a flower pot, and as shown in FIG. It consists of a female mold 4 which forms a molding cavity 3.

A cavity 61 is provided in the center of the female mold 2, and a compressed air chamber 5, which is a vertical movement device, is formed below the cavity 61. A reciprocating groove in the compressed air chamber 5 (not shown)
is connected to a converging body 11 via a swivel lever (not shown), and the converging body 11 converges a reinforcing member locking member 10 made of piano wire. The reinforcing material-based fastening member 10 has an insertion hole 81
It passes through and protrudes from the outer surface of the male mold 2 inside the cavity.

The reinforcing member locking member 1O performs a reciprocating motion of protruding or retracting the outer circumferential surface of the male mold 2 by the reciprocating groove, which is the same as in the first embodiment.

Next, to explain the type of flower pot forming process, first, the needle-shaped tip 10 of the reinforcing material locking member 10 is
A is made to protrude from the outer peripheral surface of the male mold 2.

Then, a bag-shaped reinforcing material 44' such as cheesecloth is attached to the male mold,
The end 44'a of the reinforcing member 44' is passed through the needle tip 10a and held by the male 1J12.

After that, the male mold 2 and female mold 4 are put together to form the molding cavity 3.
form. Next, a diurethane foaming material is injected through the injection port 45 to form a flower bot D having a reinforcing material 44'.

After molding, as shown in FIG. 5, the male mold 2 is opened and the needle-like tip 10at of the reinforcing material locking member 10 is recessed from the outer circumferential surface of the male mold 2 by the reciprocating mechanism, and the lower pot D is inserted into the male mold 2. Remove the mold. In this way, a flower bottle (D) with cheesecloth attached to the inner surface can be obtained. Since the reinforcing material 44' is not bonded to the male die 2 with adhesive as in the conventional case, it can be easily removed from the male die 2.

(Applications) Furthermore, the present invention is not limited to bags and 7-rower pots, but can be molded to any molded product made of synthetic resin with a reinforcing material provided on the inner surface. For example, fish boxes, bread boxes, clothing storage boxes, footwear, furniture corner bats, relief buoys, book covers, etc.
There are headrest covers, grip covers, etc.

(Effects of the Invention) According to the present invention, since the protrusion of each reinforcing member locking member from the outer circumferential surface of the male die and the retraction thereof into the male die are performed by the reciprocating mechanism, each reinforcing member is removed from the reinforcing member after the molding operation. The locking members can be automatically extracted, so the work efficiency in removing each reinforcing member locking member is good, and there is less risk of getting your fingertip stuck in the valley reinforcing member locking member, resulting in safer work. can be ensured.

Furthermore, according to the second aspect of the present invention, compressed air can be introduced between the male mold and the molded product to break the adhesion of the molded product to the male mold, making demolding work easier and requiring less manual labor. can be eliminated.

Furthermore, according to the second aspect of the invention, the forward movement of the reciprocating mechanism closes the air outlet by the on-off valve simultaneously with the protrusion of each reinforcing member locking member from the male outer circumferential surface, and the reciprocating mechanism Since each reinforcing material locking member is immersed into the male mold by the movement, and the air outlet is opened by the on-off valve at the same time, each reinforcing material locking member and the on-off valve are opened by one reciprocating mechanism. This allows the device to be made more compact and more economical.

[Brief explanation of drawings]

Figures 1 to 3 show one embodiment of the present invention, with Figure 1 being an overall explanatory view, Figure 2 being an enlarged longitudinal sectional side view of the main parts, and Figure 3 being a waterproof gutterless molded product. It is a perspective view of an eye bag, and FIGS. 4 and 5 are explanatory views showing another practical example of the present invention. B...Bag D...Flower Bottle
...Molding mold 2...Male mold 3...Molding cavity 4...Female mold 5...Compressed air chamber 10.
... Reinforcement material locking member 13 ... Reciprocating mower groove 35 ...
... Air outlet 36 ... Opening/closing valve 44 ... Patented lining cloth, Seikin Achilles Co., Ltd.'7::;'s, I,1,:(' 1,5: No 71Σ now ) Procedural Amendment (Feb. 26, 1985-・λ

Claims (2)

[Claims] (1) A molding device for obtaining a molded product having a reinforcing material on the inner surface, comprising a male mold and a female mold surrounding the male mold to form a cavity around the male mold; A plurality of reinforcements protrude from the outer circumferential surface of the male die and are pierced through the reinforcing material attached to the male die before the forming operation, and after the forming operation are immersed in the male die and pulled out from the reinforcing material. a material locking member; disposed within the male mold and reciprocating to cause each of the reinforcement material locking members to protrude onto the outer circumferential surface of the male mold; A molding device equipped with a reciprocating mechanism that moves back and forth to make the mold immerse. (2) A molding device for obtaining a molded product having a reinforcing material on the inner surface, comprising a male mold and a female mold surrounding the male mold to form a cavity around the male mold; Before the molding operation, the reinforcing material protrudes from the outer peripheral surface of the male mold outside the cavity and is attached to the male mold, and after the molding work, it is immersed in the male mold and pulled out from the reinforcing material. a plurality of reinforcing material locking members disposed within the male die, each of the reinforcing material locking members reciprocating so as to protrude to the outer peripheral surface of the male mold; a reciprocating mechanism that moves back and forth to immerse the male mold into the male mold; the reciprocating mechanism is actuated to close an air outlet between the compressed air chamber in the male mold and the cavity when the mechanism moves forward; A molding device comprising: an on-off valve that opens the air outlet when the mechanism moves back.