JPH0211409B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improved pressurizing device, and more particularly to an improved compression molding machine equipped with a mold conveying device.

Conventionally, in compression molding machines for rubber, etc., a single-stage pressure mechanism has often been used. Molding work was performed using the other single-stage compression molding machine, but the parallel single-stage compression molding machine had many drawbacks, such as an increase in installation space and equipment costs. Molding work is carried out using a stage compression molding machine or a multistage compression molding machine. However, although a two-stage compression molding machine or a multi-stage compression molding machine can pressurize many molds at once, it is not efficient as it creates a lot of waste in the transport time of molds or the molding cycle. difficult,
There is also a molding method in which a two-sided mold is used in a two-stage compression molding machine, and one side of the mold is pressure-molded while the other side is molded outside the two-stage compression molding machine. The compression stroke of this two-stage compression molding machine increased by the thickness of one side of the mold outside the two-stage compression molding machine, and it took time to complete the compression process, resulting in large power and time losses.

In addition, molds are conveyed manually or by using pneumatic or hydraulic cylinders, but these methods have many drawbacks, such as being inaccurate and slow, and requiring considerable labor and power loss. It was hot.

The present invention provides a mold conveyance device for a two-stage compression molding machine that can eliminate these drawbacks and improve the molding cycle by shortening the mold conveyance time and the mold closing time of the molding machine. It is.

A detailed description will be given below with reference to the drawings.

As shown in FIGS. 1 and 2, the present invention includes an upper surface plate A,
A two-stage compression molding machine for rubber, etc., having a structure comprising a middle surface plate B and a lower surface plate C; an upper mold 1a and an upper dummy mold 2 inserted into the upper pressure section of the molding machine.
a as a pair, and a lower mold 1b and a lower dummy mold 2b arranged in the same manner as the respective upper molds to be inserted into the lower pressurizing section as a pair, and both molds and the dummy mold. are connected in a line by a connecting cable 5 through a driven wheel 3 provided at the front of the molding machine and a drive wheel 4 provided at the rear, and by rotating the rear drive wheel 4, each The molds 1a, 1b and the respective dummy molds 2a, 2b are transported. If one pressurizing position in this conveyance process is shown in FIG. 1, when pressurizing the upper dummy mold 2a inserted into the upper pressurizing section, the upper mold 1a is located outside the front of the molding machine. The molded product in the cavity of the upper mold 1a is taken out and molding operations such as material filling are carried out. At this time, the lower mold 1b inserted into the lower pressurizing section is pressurized, and the lower dummy mold 2b is transferred. is placed outside the rear of the molding machine in a waiting position.

Next, when the material in the lower mold 1b cavity is completely molded, the upper surface plate A, middle surface plate B, and lower surface plate C of the molding machine are opened, and the rear drive wheel 4 is rotated to mold the upper mold 1b. The mold 1a, the upper dummy mold 2a, the lower dummy mold 1b, and the lower dummy mold 2b are moved relative to each other by a prescribed conveyance distance of 7 to form the pressurizing device shown in FIG.

That is, the upper stage dummy mold 2a is located outside the rear part of the molding machine, and the upper stage mold 1 is inserted into the upper stage pressurizing section.
At this time, the lower dummy mold 2b inserted into the lower pressurizing section is pressurized, and the lower mold 1b is located outside the front of the molding machine, and the molding inside the cavity of the lower mold 1b is performed. Performs work such as taking out products and filling materials.

During molding work with this two-stage compression molding machine equipped with a mold conveying device, the work level is lower in the lower mold 1b carried out of the front part of the molding machine, so as shown in FIG. 2, the lifter device 6 etc. Upper mold 1
If the structure is such that the machine is raised and lowered to the same level as the work level in a, and the molding work is performed at the same position, the molding operator will not have to move at all.

In addition, when using a material that is vulcanized and molded by heat and compression and molding with the molding machine, if the upper and lower dummy molds 2a and 2b are made of a heat insulating material having compressive strength, the dummy molds can be Since heat is no longer taken away by the heat source, the loss of thermal energy can be significantly reduced.

The present invention is a two-stage compression molding machine having such a mold conveyance device, in which the upper and lower molds 1a, 1b and the dummy molds 2a, 2b are connected by a connecting cable 5, and their conveyance can be carried out quickly and accurately at the same time. Furthermore, even if either the upper or lower mold is being pressurized, the arrangement is such that a dummy mold is always pressed on the opposite stage.
The mold closing time of the pressure cylinder of the molding machine is shortened by the height of the dummy mold, and no extra movement is required, making the mechanism simple, and the mold and dummy mold are inserted into the molding machine. Once this is done, the pressurization process can be started instantly.

As described above, according to the present invention, the mold can be transported quickly and the mold closing time can be shortened, thereby improving the molding work efficiency and greatly improving the molding cycle. This is a two-stage compression molding machine with equipment.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing one pressurizing position of a two-stage compression molding machine with a mold conveying device according to the present invention. FIG. 2 is a schematic diagram showing the other pressurizing position in FIG. 1. 1a...Upper mold, 1b...Lower mold, 2a...
...Upper dummy mold, 2b...Lower dummy mold, 3
...Front driven wheel, 4... Rear drive wheel, 5... Connecting cable, 6... Lifter device, 7...
Specified transport distance.

Claims (1)

[Scope of Claims] 1. In an upper and lower two-stage compression molding machine equipped with an upper surface plate, a middle surface plate, and a lower surface plate that pressurize a mold etc. equipped with a product cavity; inserted into the upper stage pressure section of the molding machine. A mold and a dummy mold, and a mold and a dummy mold that are arranged in the same way as the upper stage to be inserted into the lower pressure section are set as a set, and the two pairs of molds and the dummy mold are connected to the molding machine by a connecting cable. The molds and dummy molds are connected in line through driven wheels and drive wheels provided before and after the molds, and by rotating the drive wheels, the respective molds and dummy molds are transported. The other pair of molds on the other stage and the dummy mold move in the opposite direction with respect to the conveyance direction of the mold and dummy mold, and when pressurizing molding, no matter which one is being pressurized, the upper mold or the lower mold. A two-stage compression molding machine with a mold conveyance device for rubber, synthetic resin, etc., characterized by a structure in which a dummy mold is always pressurized on the opposite stage. 2. A lifting device is installed in front of the two-stage compression molding machine so that the lower mold carried out from the lower pressure section is at the same level as the upper mold carried out from the upper pressure section. A two-stage compression molding machine with a mold conveying device according to claim 1. 3. A two-stage compression molding machine with a mold conveying device according to claim 1, characterized in that the upper dummy mold and the lower dummy mold are made of a heat insulating material having compressive strength.