JP3927210B2 - Rubber injection molding equipment - Google Patents

Description

  The present invention relates to a rubber injection molding apparatus that molds a rubber product by injection molding, and more particularly to an apparatus equipped with a rubber burr collecting device.

2. Description of the Related Art Conventionally, as a rubber product vulcanization molding apparatus, a rubber injection molding apparatus is widely used which injects a fluidized rubber material from an injection device into a mold cavity to vulcanize the rubber product.
In the vulcanization molding of rubber products using this rubber injection molding apparatus, an operator performs an operation of air blowing and removing the remaining rubber burrs adhering to the molding die after vulcanization and blowing them off the molding die.

  At this time, the rubber burrs blown off from the mold by air blow are scattered around and contaminating the entire equipment, and the subsequent cleaning work becomes difficult, and the blown-off rubber burrs adhere to the cylinders of the hydraulic device. There have been problems such as oil leakage, and rubber burrs adhering to the oil inlet / outlet, clogging the inlet / outlet and causing malfunction.

Patent Document 1 listed below discloses a resin burr capturing / removing device for removing resin burrs adhering to a mold surface of a resin molded product.
However, the one disclosed in Patent Document 1 generates an electrostatic field, and the resin burr is sucked and removed from the molding surface of the molding die by electrostatic action and air suction action, and the solution is different from the present invention. .

Japanese Utility Model Publication 1-161008

  The present invention is based on the circumstances as described above, and rubber burrs blown off from the mold by air blow scatter around and contaminate the entire equipment, making subsequent cleaning difficult and malfunctioning of the hydraulic system. The present invention has been made for the purpose of providing a rubber injection molding apparatus capable of solving the problem of causing the cause.

Thus, according to the first aspect of the present invention, there is provided a rubber injection molding apparatus for injecting a fluidized rubber material into a cavity of a rubber product mold from the injection apparatus and vulcanizing the rubber product. A collection bag having a large number of ventilation holes smaller than the blown-off rubber burr and having an opening for receiving the rubber burr therein, and holding the collection bag in a state where the opening is directed to the mold A rubber burr collecting device provided with a holding member that slides on the molding die and moves the molding die between a molding position and a demolding position. It is provided .

According to a second aspect of the present invention, in the first aspect, the holding member has a substantially container shape as a whole, and has an accommodating space for accommodating the collecting bag inside, and from the vent hole of the collecting bag. An air vent opening for letting out the escaped air to the outside is provided .

Effects and effects of the invention

  As described above, the present invention can be attached to and removed from the collection bag for collecting the rubber burrs blown off from the mold by air blow, and in a state where the bag is directed to the mold. In the rubber injection molding apparatus, according to the present invention, the molding die is disassembled after vulcanization in the vulcanization molding process of the rubber product. When the rubber burrs adhering to the surface are blown off by air blow, they can be collected in the collection bag of the rubber burr collecting device, and the blown-off rubber burrs are scattered around, making the equipment dirty or subsequent cleaning difficult. And the problem that rubber burrs cause malfunction of the hydraulic device can be solved.

Further, in the present invention, the rubber burr collecting device is provided on a slide member that slides on the molding die and moves the molding die between a molding position and a demolding position.
  In this way, when the mold is moved to the mold release position and removed from the mold, and the air blow is performed, the rubber burr collecting device can also be moved together with the mold to an appropriate collection position. Thus, there is an advantage that the rubber burr collected by the rubber burr collecting device can be well collected without escaping to the outside, that is, without being scattered.

Here, the holding member is generally formed in a container shape so that the collection bag is accommodated in the inside storage space, and the air that escapes from the ventilation hole of the collection bag is released to the outside. An opening can be provided (claim 2).
If it does in this way, the air which entered the inside of the collection bag with the rubber burr can be released to the outside well through the ventilation hole of the collection bag and the opening for air venting in the holding member. Only rubber burrs can be collected in the bag well .

Next, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 shows the overall configuration of a rubber injection molding apparatus according to the present embodiment. As shown in FIG. 1, this rubber injection molding apparatus has an injection device 10 and a molding device 12.
The injection apparatus 10 includes an injection pot 14, an extruder 16 that plasticizes and fluidizes a ribbon-like rubber material by rotation of a screw, and pushes it into the injection pot 14, and the rubber material filled in the injection pot 14 in the drawing. The plunger 18 which injects from the injection pot 14 by the downward advance movement, and the drive cylinder 20 are provided.
The injection device 10 projects the plunger 18 downward and injects the rubber in the injection pot 14 toward the lower mold 24.

The molding device 12 includes a mold clamping device 22 and a molding die 24.
In FIG. 1, reference numeral 25 denotes a hydraulic device in the mold clamping device 22.
The mold 24 is configured as an upper and lower divided mold of an upper mold 26, an intermediate mold 28, and a lower mold 30, and a cavity 34 for molding a rubber product 32 is formed as shown in a partially enlarged view of FIG. Have.

As shown in FIG. 2, the middle mold 28 has a shape in which left and right end portions in the same figure protrude in the same direction.
As shown in FIG. 2, a heat plate 36 is provided on the lower side of the lower mold 30, a heat insulating plate 38 is provided on the lower side, and a first slide plate 40 is provided on the lower side. ing.
Reference numeral 42 denotes a movable plate that moves up and down at the molding position to raise or lower the middle die 28 and the lower die 30 together with the hot plate 36, the heat insulating plate 38, and the like.

  The first slide plate 40 extends to the left in the drawing as shown in FIGS. 1 and 4, and collectively accommodates the wiring connected to the heater embedded in the hot plate 36 on the end thereof. A wiring box 44 is provided, and a second slide plate 46 that also serves as a lid for the wiring box 44 is provided above the wiring box 44. Here, the second slide plate 46 extends further to the left in the drawing from the wiring box 44.

In the present embodiment, the entire first slide plate 40, wiring box 44, and second slide plate 46 constitute a slide member 59 (see FIG. 3).
The slide member 59 composed of the first slide plate 40, the wiring box 44, and the second slide plate 46 is moved forward and backward in the left-right direction in FIG.
On the other hand, a table 48 is provided in the front part (right part in FIG. 1) of the molding apparatus 12, and a mold disassembling apparatus 50 for disassembling the middle mold 28 and the lower mold 30 in the molding mold 24 is provided on the table 48. Is provided.

The mold disassembly apparatus 50 includes an elevating member 52 and a drive cylinder 54 that drives the elevating member 52 to move up and down.
Here, as shown in FIG. 2, a pair of elevating members 52 are provided on the left and right sides, and by raising and lowering these elevating members 52, the middle mold 28 is lifted from below, and the middle mold 28 is moved upward from the lower mold 30. Separate.

As shown in FIG. 3, a rubber burr collecting device 60 is provided on the slide member 59, specifically on the second slide plate 46.
The rubber burr collecting device 60 includes a holding member 62 and a collecting bag 64.
The holding member 62 is formed by processing a metal plate into a container shape, and has a storage space for the collection bag 64 inside thereof, and the collection bag 64 is detachably accommodated therein. Yes.

Here, the holding member 62 is provided with a plurality of large openings 68 for venting air.
A plurality of hooking claws 70 for hooking the collection bag 64 are provided along the opening 66 of the collection bag 64 at the front portion thereof.
The collection bag 64 is made of a flexible wire rod knitted into a net, and has a large number of meshes as vent holes.
Moreover, it has a large opening 66 for receiving a rubber burr blown off by air blow.

As shown in FIG. 3, the rubber burr collecting device 60 is disposed with the opening 66 of the collection bag 64 directed toward the mold 24, specifically toward the middle mold 28 and the lower mold 30.
The collection bag 64 can be easily attached to and detached from the holding member 62, and can be removed from the holding member 62 by removing the end on the opening 66 side from the latching claw 70. It is possible to easily set it on the holding member 62 by hooking the end of this to the latching claw 70.

Next, the operation of the injection molding apparatus of this embodiment will be described.
In this embodiment, the mold 24 is held in the mold-clamped state by the mold-clamping device 22 in FIG. 1, and the plunger 18 is projected downward in the figure by the drive cylinder 20 in this state, thereby filling the injection pot 14. The fluidized rubber material is injected into the cavity 34 of the mold 24.
In this state, the rubber material injected into the cavity 34 is vulcanized to become a rubber product 32 by being held for a predetermined time.

Thereafter, the middle mold 28 and the lower mold 30 in the mold 24 are lowered, and as shown in FIG. 4 (I), the slide member 59 is advanced from the left to the right in FIG. More specifically, the middle mold 28 and the lower mold 30 placed on the first slide plate 40 are brought together on the table 48.
That is, the middle mold 28 and the lower mold 30 are moved from the molding position to the mold disassembly position (see FIG. 4 (II)).

Thereafter, when the mold disassembling apparatus 50 is operated and the lifting member 52 is moved up, the middle die 28 is lifted upward by the lifting member 52 (see FIGS. 4 (III) and (IV)) and separated from the lower die 30. The
The rubber product 32 is lifted upward together with the middle die 28 while being held by the middle die 28.

  Thereafter, the rubber product 32 is removed from the mold, and at the same time, the rubber burrs adhering to the middle mold 28 or the lower mold 30 (the thin burrs of rubber leaking along the joints between the middle mold 28 and the upper mold 26 or the lower mold 30). 3) is blown away from the middle mold 28 or the lower mold 30 to the rear (left side in FIG. 1) by air blow by the air gun 58 of FIG.

The rubber burrs blown off at this time enter the collection bag 64 of the rubber burr collection device 60 at the air blow destination through the opening 66, and only the blown air is blown out of the collection bag 64 and further to the holding member 62. The rubber 68 is extracted outside through the opening 68 and only the rubber burrs are collected in the collection bag 64.
That is, the blown rubber burrs are concentrated in the collection bag 64 and collected in one place.

  According to the present embodiment as described above, when the rubber mold 32 is disassembled after vulcanization and the rubber burrs adhering thereto are blown off by air blow in the vulcanization molding process of the rubber product 32, the rubber burrs are collected. The rubber burrs that can be collected in the collection bag 64 at 60 are scattered around, and the equipment becomes dirty or the subsequent cleaning becomes difficult, and the rubber burrs cause the malfunction of the hydraulic device 25. Can be solved.

  Further, in the present embodiment, the holding member 62 has a generally container shape as a whole, and the collection bag 64 is accommodated in the inner accommodation space, and the air that has escaped from the vent hole of the collection bag 64 is provided. Since the opening 68 for venting air to the outside is provided, the air that has entered the inside of the collection bag 64 with rubber burrs is removed from the ventilation hole of the collection bag 64 and the opening for venting the holding member 62. It is possible to escape to the outside through 68, and it is possible to collect only rubber burrs inside the collection bag 64.

  Further, in the present embodiment, a rubber burr collecting device 60 is provided on a slide member 59 that slides with the molding die 24 mounted thereon and moves the molding die 24 between a molding position and a mold disassembly position (demolding position). Therefore, when the molding die 24 is moved to the removal position and removed there, and the air blow is performed, the rubber burr collecting device 60 can also be moved together with the molding die 24 to an appropriate collection position. The rubber burr that has been blown off in step (b) can be advantageously collected by the rubber burr collecting device 60 without escaping to the outside, that is, without being scattered.

  Although the embodiment of the present invention has been described in detail above, this is merely an example, and the present invention can be configured in various forms without departing from the spirit of the present invention.

It is a figure showing the whole rubber injection molding device composition which is one embodiment of the present invention. It is a figure which shows the type | mold decomposition | disassembly apparatus in FIG. 1 with a peripheral part. It is a figure which shows the rubber burr | flash collection apparatus in FIG. It is operation | movement explanatory drawing of the embodiment.

Explanation of symbols

14 Injection pot 24 Mold 32 Rubber product 34 Cavity 59 Slide member 60 Rubber burr collection device 62 Holding member 64 Collection bag 66 Opening 68 Opening

Claims (2)

In a rubber injection molding apparatus for injecting fluidized rubber material into a mold cavity of a rubber product from an injection device and vulcanizing the rubber product, a large number of air holes smaller than the rubber burrs blown off from the mold by air blow And a collection bag having an opening for receiving the rubber burr therein, and a holding member for detachably holding the collection bag with the opening facing the mold The rubber burr collecting device is provided on a slide member that slides on the molding die and moves the molding die between a molding position and a demolding position. apparatus.   In Claim 1, The said holding member has comprised the general | schematic container shape as a whole, and has the accommodation space which accommodates the said collection bag inside, and the air which escaped from the said ventilation hole of this collection bag is carried out outside. A rubber injection molding apparatus provided with an opening for venting air.

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