CN203818604U - Pressing type hydraulic machine used during compression molding - Google Patents

Abstract

The utility model discloses a hydraulic machine and particularly relates to a pressing type hydraulic machine used during compression molding. A cylinder cavity is formed in a machine base. An opening of the cylinder cavity is located in a table surface of the machine base. A plunger is connected into the cylinder cavity in a sealed and plugged mode. The top surface of the plunger is connected with the bottom surface of a movable cushion plate in a transmission mode. A sealed oil inlet cavity is defined by the bottom surface of the plunger and the inner surface of the cylinder cavity through cooperation. By the adoption of the pressing type hydraulic machine used during compression molding, the technical problem that the working stability of an existing hydraulic machine is low is solved; due to the fact that a working oil cylinder is arranged on the lower portion of the machine base, the center of gravity of the whole hydraulic machine is lower, the machine base is good in stability in use, and installation and maintenance are also convenient.

Description

A press-down hydraulic press used in compression molding

technical field

The utility model relates to a hydraulic press, in particular to a press-down hydraulic press used in compression molding.

Background technique

Compression molding, also known as compression molding, is to put powdery, granular or fibrous plastic into the mold cavity at the molding temperature, and then close the mold and pressurize to melt the plastic and fill the mold cavity to form a film cavity. Products with the same shape are then cured.

The equipment used in compression molding is mainly a press and a mold, and the press is used as a power device for compression molding. There are many types of presses, and the commonly used ones are mechanical and hydraulic. Among them, hydraulic presses are the most popular. At present, the working cylinders of hydraulic machines on the market are all located above the press, mainly relying on the self-weight of the plunger to move downward. The upward movement needs to be realized by hydraulic transmission. The lower platen of the press is fixed, and the positive and negative films of the mold are respectively fixed on the upper and lower platens. The opening and closing of the mold and the application of pressure to the plastic are completed by the lifting of the upper platen. Once the product is solidified and completely cooled, the product will be demolded by the fixing mechanism on the machine base. Since the working oil cylinder (center of gravity) is on the upper part of the machine, the stability of the entire machine is poor during work. Installation and Maintenance is also inconvenient.

Utility model content

The purpose of this utility model is to provide a press-down hydraulic press used in compression molding in order to solve the deficiencies of the above-mentioned technologies. The base of the press-down hydraulic press has good stability during operation.

In order to achieve the above-mentioned purpose, a press-down hydraulic press used in compression molding designed by the utility model includes a machine base, and four guide rods are erected on the above-mentioned machine base, and the four guide rods are connected to each other. Arranged in the shape of a well, a fixed backing plate and a movable backing plate are connected in series on the above four guide rods, wherein the fixed backing plate is located at the top of the guide rods and is limited by the stroke adjustment sleeve. The backing plate is located directly below the fixed backing plate, and can reciprocate up and down between the above-mentioned fixed backing plate and the table top of the machine base. A cylinder cavity is formed on the above-mentioned machine base, and the cavity of the cylinder cavity is located on the table top of the machine base. , the sealing plug in the above-mentioned cylinder chamber is connected with a plunger, the top surface of the plunger is in transmission connection with the bottom surface of the movable backing plate, and its bottom surface cooperates with the inner surface of the cylinder chamber to form a sealed oil inlet chamber.

The above-mentioned press-down hydraulic press also includes an upper mold and a lower mold, wherein the above-mentioned lower mold is fixed on the top surface of the movable backing plate, and the upper mold is fixed on the bottom surface of the fixed backing plate, and when the movable backing plate is on the column When approaching the fixed backing plate under the pushing force of the plug, mold clamping is carried out between the above-mentioned upper mold and the lower mold. As preferably, an insulating layer is provided on the top surface of the above-mentioned middle movable backing plate, and the above-mentioned lower mold is fixed on the insulating layer; an insulating layer is also provided on the bottom surface of the above-mentioned middle fixed backing plate, and the above-mentioned upper mold is fixed on on the insulating layer. In the above preferred solution, when the upper and lower molds of the down-press hydraulic press are electrically heated, even if there is an electric leakage in the upper and lower molds, the machine base will not be electrified, reducing the generation of potential safety hazards.

As a further technical improvement, the above-mentioned middle and lower pressure hydraulic machine also includes a hydraulic pipeline. One port of the above-mentioned hydraulic pipeline is connected to the sealed oil inlet chamber after passing through the machine base, and the other end is led out of the machine base, so that the external hydraulic pressure The source can easily enter the sealed oil inlet chamber in the frame.

In the press-down hydraulic press used in compression molding provided by the utility model, the working oil cylinder is arranged at the lower part of the machine base, so the center of gravity of the whole hydraulic machine is lower, and the machine base is stable during use, and at the same time Easy to install and maintain.

Description of drawings

Fig. 1 is a schematic structural view of a press-down hydraulic press used in compression molding provided in Example 1;

Fig. 2 is a schematic structural view of a press-down hydraulic press used in compression molding provided in Example 2;

Fig. 3 is a schematic structural view of a press-down hydraulic press used in compression molding provided in Example 3;

FIG. 4 is a schematic structural view of a press-down hydraulic press used in compression molding provided in Example 4. FIG.

Among them: machine base 1, guide rod 2, fixed backing plate 3, movable backing plate 4, stroke adjustment sleeve 5, cylinder cavity 6, plunger 7, sealed oil inlet chamber 8, upper mold 9, lower mold 10, insulation layer 11. Hydraulic pipeline 12.

Detailed ways

Below by embodiment in conjunction with accompanying drawing, the utility model is further described.

Example 1:

As shown in Figure 1, a press-down hydraulic press used in compression molding provided in this embodiment includes a machine base 1, four guide rods 2 are erected on the above-mentioned machine base 1, and the four guide rods 2 The guide rods 2 are arranged in a well shape, and a fixed backing plate 3 and a movable backing plate 4 are connected in series on the above four guide rods 2, wherein the fixed backing plate 3 is located on the top of the guide rods 2 The position is limited by the stroke adjustment sleeve 5. The movable backing plate 4 is located directly below the fixed backing plate 3, and can reciprocate up and down between the above-mentioned fixed backing plate 3 and the table surface of the machine base 1. The above-mentioned machine base 1 A cylinder chamber 6 is formed, and the mouth of the cylinder chamber 6 is located on the platform of the machine base 1. A plunger 7 is sealed in the above cylinder chamber 6. The top surface of the plunger 7 is connected to the bottom surface of the movable backing plate 4. Transmission connection, its bottom surface cooperates with the inner surface of the cylinder chamber 6 to enclose the sealed oil inlet chamber 8.

Example 2:

The general structure of the press-down hydraulic press used in compression molding provided in this embodiment is consistent with that of Example 1, as shown in Figure 2, but the press-down hydraulic press in this embodiment also includes an upper press Mold 9 and lower mold 10, wherein above-mentioned lower mold 10 is fixed on the top surface of movable backing plate 4, upper mold 9 is fixed on the bottom surface of fixed backing plate 3, and when movable backing plate 4 pushes on plunger 7 When approaching the fixed backing plate 3 under active force, mold clamping is carried out between the above-mentioned upper mold 9 and the lower mold 10 .

Example 3:

The general structure of the press-down hydraulic press used in compression molding provided in this embodiment is consistent with that of Embodiment 2, as shown in Figure 3, but on the top surface of the movable backing plate 4 in this embodiment An insulating layer 11 is provided, and the above-mentioned lower mold 10 is fixed on the insulating layer 11; an insulating layer 11 is also provided on the bottom surface of the above-mentioned middle fixed backing plate 3, and the above-mentioned upper mold 9 is fixed on the insulating layer 11. When the upper and lower molds 10 of the down-pressing hydraulic press in the above preferred solution are electrically heated, even if the upper and lower molds 9 and 10 leak electricity, the machine base 1 will not be electrified, reducing the generation of potential safety hazards.

Example 4:

The general structure of the press-down hydraulic press used in compression molding provided in this embodiment is consistent with that of Example 3, as shown in Figure 4, but the press-down hydraulic press in this embodiment also includes a hydraulic press Pipeline 12, one port of the above-mentioned hydraulic pipeline 12 runs through the machine base 1 and connects with the sealed oil inlet chamber 8, and the other end leads out of the machine base 1, so that the external hydraulic source can easily enter the machine base 1 Seal the oil inlet chamber 8.

Claims (4)

1. the press-down type hydraulic press using in a compression molding moulding, comprise support (1), the upper setting of above-mentioned support (1) has four guide rods (2), and these four guide rods (2) are the well word shape of arranging each other, on above-mentioned four guide rods (2), be jointly serially connected with fixedly backing plate (3) and a movable pad (4), wherein this fixedly backing plate (3) be positioned at the tip position of guide rod (2) and undertaken spacing by stroke adjustment cover (5), movable pad (4) be positioned at fixing backing plate (3) under, and can between above-mentioned fixedly backing plate (3) and support (1) table top, pump, it is characterized in that being formed with on above-mentioned support (1) cylinder chamber (6), and the accent in this cylinder chamber (6) is positioned on support (1) table top, in above-mentioned cylinder chamber (6), sealing-plug is connected to plunger (7), the bottom surface of the end face of this plunger (7) and movable pad (4) is in transmission connection, the inner surface in Yu Gang chamber, its bottom surface (6) coordinates together to have surrounded and is sealed into oil-in chamber (8).

2. the press-down type hydraulic press using in a kind of compression molding moulding according to claim 1, it is characterized in that it has also comprised hydraulic line (12), above-mentioned hydraulic line (12) one ports are connected with being sealed into oil-in chamber (8) after running through support (1), and its other end is drawn outside support (1).

3. the press-down type hydraulic press using in a kind of compression molding moulding according to claim 1 and 2, it is characterized in that it has also comprised mold (9) and bed die (10), wherein above-mentioned bed die (10) is fixed on the end face of movable pad (4), mold (9) has been fixed on fixedly on the bottom surface of backing plate (3), and when movable pad (4) approaches fixedly backing plate (3) under the impetus power of plunger (7), between above-mentioned mold (9) and bed die (10), carry out matched moulds.

4. the press-down type hydraulic press using in a kind of compression molding moulding according to claim 3, is characterized in that being provided with insulating barrier (11) on the end face of above-mentioned middle movable pad (4), and above-mentioned bed die (10) is fixed on this insulating barrier (11); In above-mentioned, fixedly on the bottom surface of backing plate (3), be provided with equally insulating barrier (11), above-mentioned mold (9) is fixed on this insulating barrier (11).