JPH05147046A - Continuous vulcanizing molding apparatus - Google Patents

Abstract

PURPOSE:To provide the title apparatus capable of freely selecting the number of molds to be used and arbitrarily adjusting heating times at every molds and reduced in its occupying area. CONSTITUTION:A continuous vulcanizing molding apparatus is equipped with an injection device 34 successively injecting a molding material in molds 10 in an injection station 32, a heating shelf device 40 having a plurality of the receiving parts of the molds 10 and a means heating the molds 10 received in the receiving parts and a feed-in means 36 feeding the molds 10 filled with the molding material in the arbitrary receiving parts of the heating shelf device 40. Further, a taking-out means 36 taking out the molds 10 held to the receiving parts of the heating shelf device 40 for a predetermined time is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous hot molding apparatus suitable for use in a vulcanization molding apparatus for rubber products.

[0002]

2. Description of the Related Art As a continuous vulcanization molding apparatus for rubber products, a molding die is circulated along a circular conveying path, and an injection station, a vulcanizing machine provided along the conveying path. Injection and vulcanization of rubber materials at the vulcanization station, mold disassembly station, mold assembly station, etc.
2. Description of the Related Art A rotary vulcanization molding apparatus is known that is capable of performing predetermined work such as mold disassembly and mold assembly.

FIG. 11 (A) schematically shows the rotary type continuous vulcanization molding apparatus. 20 in the figure
Reference numeral 0 is a rotary table, 202 is a heating and mold clamping device arranged on the table 200 at predetermined intervals, and 206 is an injection device for injecting a rubber material into a molding die.

In this rotary type vulcanization molding apparatus, a rubber material is injected into the molding die by an injection unit 206 at an injection station.

The molding die that has received the injection of the rubber material is sequentially fed by the rotation of the table 200 while being heated and clamped by the heating and clamping device 202, and the mold is disassembled, the product is taken out, and the mold is taken at the subsequent station. After assembling and the like, it reaches the injection station again, where the rubber material is injected again. Then, such an operation is repeatedly performed, and the rubber product is continuously vulcanized and molded.

However, this rotary vulcanization molding apparatus has a problem that it is difficult to cope with a change in vulcanization time.

For example, when it is desired to shorten the vulcanization time, even if the injection speed, the mold clamping speed, the mold opening speed, the turning speed of the table, etc. are shortened, they are naturally limited, and the vulcanization time is shortened beyond a certain level. You can't.

On the contrary, when it is desired to lengthen the vulcanization time, the turning speed of the table 200 may be slowed down, so that it is possible to realize this by using the same device.

However, in this case, although the injection speed, the mold clamping speed, the mold opening speed, etc. have a sufficient margin, the cycle time becomes long and the production efficiency is significantly lowered.

Therefore, in such a case, in such a rotary type vulcanization molding apparatus, the number of stations of the molding die and the heating / clamping apparatus is increased from, for example, 6 stations to 8 stations, and further to 20 stations. Inevitably, in this case, the device becomes large and complicated, and the device cost also increases accordingly.

Further, in the case of this rotary type vulcanization molding apparatus, there is a problem that it takes a lot of time to replace the molding die when changing the type of product (therefore, this is not generally done), and it has been determined. Requires a certain number of molds, one of which is
If any of them is damaged, the vulcanization molding operation may not be able to continue.

In addition, since different types of rubber products cannot be molded and vulcanized at the same time, there is a problem that they are not suitable for high-mix low-volume production.

On the other hand, as shown in FIG. 11B, a molding die 204, which is injected and filled with a rubber material at an injection station, is moved along a circulation conveyance path and a heating furnace provided on the circulation conveyance path. It is also known that a molding die 204 is passed through the heating furnace 208 to heat the molding die 204 to cause a vulcanization reaction.

However, this device has drawbacks that it occupies a large floor area and the thermal efficiency is poor.

[0015]

The device of the present invention has been devised to solve such a problem, and its gist is (a) injecting a molding material into a molding die at an injection station sequentially. An injection device for filling, (b) a heating shelf device provided with a plurality of accommodating parts for accommodating the molding dies, and heating means for heating the molding dies accommodated in the accommodating parts,
(C) a carrying-in means for carrying in the molding die filled with the molding material into any of the plurality of accommodation units in the heating shelf device; and (D) a predetermined time in the accommodation unit of the heating shelf device. And a take-out means for taking out the held molding die from the accommodating portion.

[0016]

As described above, in the apparatus of the present invention, the molding die is housed in any one of a plurality of housing parts of the heating shelf device, and is heated there for a predetermined time. Is.

According to the apparatus of the present invention, it is possible to house a plurality of molding dies independently in the housing part of the heating shelf device and heat them there for a predetermined time.

Therefore, it is possible to freely select the number of molding dies, and it is not necessary to use much nerve for maintenance of the molding dies.

Also, the heating time can be freely set or adjusted for each molding die, and since many kinds of molding dies can be used at the same time, only a single type of product can be used. It is also possible to heat-mold many types of products simultaneously.

Further, even when the product type is changed, the setup work does not require much labor and time.

Further, the heating shelf device can be constructed so that a plurality of molding dies are stacked on top of each other, whereby the floor area occupied by the device can be reduced.

[0022]

Embodiments of the present invention will now be described in detail with reference to the drawings. In FIG. 2, reference numeral 10 denotes a molding die, which is composed of three divided bodies of an upper die 12, a middle die 14 and a lower die 16.

The upper die 12 is provided with bolt holes 22 for inserting the tightening bolts 18 and for accommodating the head portion 20, while the lower die 16 is provided with female screw holes 24. A screw bush 26 is screwed and attached to the.

The screw bush 26 is formed by densely winding a metal wire rod having a rhombic cross section into a cylindrical coil shape. Male and female screws are formed on the outer peripheral surface and the inner peripheral surface, and the male screw is the female screw of the lower die 16. It is screwed into the hole 24.

In this molding die 10, the inner circumference of the screw bush 26 in which the tightening bolt 18 is inserted from the bolt hole 22 of the upper die 12 and the threaded portion of the tip is screwed into and attached to the female screw hole 24 of the lower die 16. By screwing into the female thread of the surface, the three divided bodies are tightened.

This molding die 10 is shown in FIGS. 1 and 3 to 8.
An apparatus for continuously vulcanizing a rubber product by using is shown.

First of all, as shown in FIG. 1, this apparatus has a molding die 1 at stations 26, 28 and 30.
After performing 0 disassembly, product removal, mold assembly and mold clamping, the injection device 34 injects the rubber material at the injection station 32.

Molding die 10 injecting and filling rubber material
Next, is carried into each accommodation part of the heating shelf device 40 arranged in the vulcanization station 38 by the carry-in and take-out device 36, is held therein for a predetermined time, and is heated.

After heating for a predetermined time, the molding die 10 is carried in.
It is taken out of the container by the take-out device 36, conveyed by a conveyor, and then sent to a station for mold decomposition and product take-out again.

The loading / unloading device 36 has a column 42 as shown in FIG. The columns 42 are erected on a slide base 44, and the slide base 4
4, the screw shaft 48 driven by the motor 46 is rotated to slide in the horizontal direction in FIG. 3 (vertical direction in FIG. 1B) under the guide of the guide rail 50. ..

Sprockets are provided at the upper end and the lower end of the column 42, and a chain 52 is wound around them. A pair of elevating bodies 54 are fixed to the chain 52 and are moved up and down by driving the chain.

A motor 56 is mounted and fixed on the lifting body 54 as shown in FIG. 4, and below the motor 56, first and second sliders 58, 58 are also provided as shown in FIG. 6
0 is arranged, and the sliders 58 and 60 are slidably suspended by the elevating body 54.

A drive chain 62 is attached to the first slider 58.
Is fixed. The drive chain 62 is wound around a sprocket 63 provided on the output shaft of the motor 56.

On the other hand, one end of each of forward and backward chains 64 and 66 is fixed to the second slider 60. The forward and backward chains 64 and 66 are respectively wound around the sprockets 68 and 70 provided on the first slider 58 in opposite directions, and the upper ends thereof are fixed to the elevating body 54.

Therefore, when the first slider 58 is moved forward or backward by the stroke l as shown in FIG. 6 by the drive chain 62, the second slider 60 is moved forward or backward by a double stroke, that is, the stroke 21. ..

The second slider 60 is provided with a downward hooking portion 72 as shown in FIG.
2, the upper end of the molding die 10 is suspended.

The heating shelf device 40 includes a large number of shelf plates 74 arranged vertically and horizontally as shown in FIGS. The left and right ends of each shelf plate 74 are fixed to the vertical frame.
The lower heating plate 76 is fixed on the upper part of the upper part of FIG.

An upper heating plate 78 is arranged downward at an upper position with a predetermined distance from the lower heating plate 76. These upper heating plates 78 are suspended by a suspension plate 80.

A support bracket 82 extends from each suspension plate 80, and the support bracket 82 is slidably fitted to a vertically extending rod 84.

The elevating rod 84 has large-diameter portions 86 and 88 at the upper portion and the lower portion of the support bracket 82.
Is provided between the large diameter portions 86 and 88.
Is fitted.

This spring 90 is used for the support bracket 8
2, that is, the upper heating plate 78 is elastically bulged downward, and the support bracket 82 is in a state of being supported by the large diameter portion 86 on the lower side when the elevating rod 84 is raised.

The lifting rods 84 are moved up and down by a predetermined stroke by the cylinder 92 as shown in FIG.

Next, the operation of this apparatus will be described. When the rubber material is injected into the molding die 10 at the injection station 32, the first and second sliders 58 and 60 on the lower side of the elevating body 54 in the loading / unloading device 36 that has been on standby are shown in FIG.
(A) It is retracted to the left in the middle and then the second slider 6
The hooking portion 72 of 0 hooks the upper end portion of the molding die 10 and suspends it by raising the minute stroke of the elevating body 54.

When the molding die 10 is suspended, the first and second sliders 58, 60 then move forward to move the molding die 10 to each other.
Is removed from the injection station 32.

Next, the molding die 10 is moved vertically and horizontally by the ascending / descending movement of the ascending / descending body 54 and the advancing / retreating movement of the support column 42, and brought to a desired position.

At this stage, the elevating rod 84 of the heating rack device 40 is moved up by a minute stroke by the cylinder 92, and the molding die 10 suspended by the second slider 60 is subsequently moved to the second slider 60 and the first slider 58. By the forward movement of the insert mold, it is inserted into the molding die housing part of the empty part.

Subsequently, the first and second sliders 58 and 60 are moved down by a minute stroke and then retracted to form the molding die 1.
0 is placed on the lower heating plate 76. Then, after that, the elevating rod 84 is moved downward, and the molding die 10 placed on the lower heating plate 76 is sandwiched by the lower heating plate 76 and the upper heating plate 78. At this time, the upper heating plate 78 has a spring 90.
By the elastic force of, the mold is pressed against the upper surface of the molding die 10.

After that, the molding die 10 is held at that position for a predetermined time and is subjected to the heating action by the heating plates 76 and 78. That is, vulcanization is performed for a predetermined time.

After the elapse of the predetermined time, the molding die 10 after heating and vulcanization is taken out by the operation substantially opposite to that described above, and then transferred to the conveyor, where it is carried to the mold disassembling / product taking-out station. ..

As described above, the apparatus of this embodiment is the heating rack device 40.
The molding dies 10 are carried into arbitrary positions of the plurality of housings and heated, regardless of the number of the molding dies 10 used, and each of the molding dies 10 is independently heated for a desired time. Moreover, different types of molding dies can be used at the same time without any trouble, and different types of products can be continuously vulcanized and molded in a mixed state.

9 and 10 show another embodiment of the present invention. As shown, in this example, the lifting body 100 is
A screw shaft 104, which is rotationally driven by a motor 102, feeds up and down.

The elevating body 100 suspends the molding die 10 in two upper and lower stages. That is, as shown in FIG. 10, the first slider 108 and the second slider 110 are vertically arranged in two stages on the elevating body 100.
By the hook portion 72 of each second slider 110, the molding die 1
It is designed to hang 0.

A rack 112 is provided on the first slider 108, and the rack 112 is provided on the elevating body 100 and meshed with a pinion 114 which is rotationally driven by a motor 116.

In this example, the lifting body 100 is moved up and down by the screw shaft 104, and the first slider 108 is moved back and forth in the horizontal direction by the rotation of the pinion 114.

The second slider 110 is moved forward / backward by a double stroke by interlocking with the first slider 108 by the forward and backward chains 64, 66 as in the above example.

The embodiment of the present invention has been described in detail above, but this is merely an example, and the present invention can be configured in a form in which various modifications are made based on the knowledge of those skilled in the art without departing from the spirit of the invention. is there.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a continuous vulcanization molding apparatus that is an embodiment of the present invention.

FIG. 2 is a perspective view of a molding die used.

FIG. 3 is a front view of a loading / unloading device of the same continuous vulcanization molding device.

FIG. 4 is a front view (partially sectional view) of a main part of the loading / unloading device.

FIG. 5 is an operation explanatory view of the loading / unloading device.

FIG. 6 is a diagram for explaining the operation of the loading / unloading device.

FIG. 7 is a front view of a main part of a heating shelf device of the same continuous vulcanization molding device.

FIG. 8 is a diagram showing an enlarged main part of the heating rack device.

FIG. 9 is a front view of the main parts of a loading / unloading device according to another embodiment of the present invention.

FIG. 10 is a partially cutaway side view of the lifting body and a peripheral portion in FIG.

FIG. 11 is an explanatory diagram for explaining the background of the present invention.

[Explanation of symbols]

10 Molding die 32 Injection station 34 Injection device 36 Loading / unloading device 40 Heating rack device 44 Slide base 48, 104 Screw shaft 54, 100 Elevator 58, 108 First slider 60, 110 Second slider 72 Hooking part 74 Shelf plate 76 Lower heating plate 78 Upper heating plate 80 Lifting plate 84 Lifting rod

Continuation of front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display area // B29K 21:00 105: 24

Claims (1)

[Claims] 1. An injection device for sequentially injecting and filling a molding die with a molding material in an injection station, and (b) a plurality of accommodating portions for accommodating the molding die and the molding accommodated in the accommodating portion. A heating shelf device provided with a heating means for heating a mold, and (c) a carry-in means for carrying in the molding die filled with the molding material into any one of the plurality of accommodating portions in the heating shelf device. And (d) a continuous heating and molding apparatus comprising: a take-out means for taking out the molding die held in the housing of the heating shelf device for a predetermined time from the housing.