JPS60214B2 - Synthetic resin outflow control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION In the present invention, a die 1 for extrusion molding of synthetic resin is provided with a molding port 2, and a synthetic resin outflow port 4 of different diameter is provided in a breaker plate 3 for adjusting the outflow amount of the synthetic resin. A breaker plate 3 is sandwiched between the extrusion port 6 of the synthetic resin extruder 5 and the die 1, and a small-diameter synthetic resin outflow port is provided in the large cross-sectional area of the molding port 2 of the die 1. 4a facing each other, and a large-diameter synthetic resin outflow port 4b facing the part with a small cross-sectional area, the purpose of which is to control the molding of a die. An object of the present invention is to provide a synthetic resin outflow amount adjusting device whose opening can be made to have the same shape as a molded product.

In conventional extrusion molding of synthetic resins, the extrusion pressure varies depending on the shape of the die 1, and the synthetic resin is processed more easily in the part of the molding port 2 of the die 1 with a smaller cross-sectional area than in the part with a larger cross-sectional area. However, there was a drawback that the cross-sectional area of the synthetic resin flowing out from the portion with a small cross-sectional area was smaller than that of the portion with a small cross-sectional area of the molding opening 2 of the die.

Therefore, in the small cross-sectional area of the molding opening of the die, the cross-sectional area must be larger than the cross-sectional area of the required molded product, and this uniquely determines the shape of the molding opening of the die. The disadvantage was that it was impossible to do so, and it required several revisions. The present invention will be described in detail below according to examples.

The die 1 is for extrusion molding a synthetic resin, and has a molding port 2 formed therein, and the molding port 2 has the same shape as the molded product. The breaker plate 3 is used to adjust the outflow amount of synthetic resin, and is provided with a large number of synthetic resin outflow ports 4 having different diameters. The synthetic resin extruder 5 gradually heats a pellet of synthetic resin, turns it into a fluid, and extrudes it to the outside through an extrusion port 6. Therefore, a breaker plate 3 is sandwiched between the extrusion port 6 of the synthetic resin extruder 5 and the die 1, and a small diameter synthetic resin outflow port 4a is provided in the large cross-sectional area of the molding port 2 of the die 1. They are made to face each other, and a large-diameter synthetic resin outlet 4b is made to face a portion with a small cross-sectional area, so that the extrusion pressure of the synthetic resin is made uniform between the die 1 and the breaker plate 3. In the present invention, a breaker plate is sandwiched between the extrusion port and the die of the synthetic resin extruder, and a small diameter synthetic resin flow/outlet is opposed to the large cross-sectional area of the molding port of the die. Since the large-diameter synthetic resin outlet is placed opposite the 4-diameter cross-sectional area, it is easy to extrude the synthetic resin in the large cross-sectional area of the molding opening of the die, but it is easy to extrude the synthetic resin in the small-diameter portion of the plate. It is difficult to extrude the resin at the resin outlet, and conversely, it is difficult to extrude the synthetic resin at the die where the cross-sectional area of the die is small, but it is easy to extrude at the large diameter synthetic resin outlet of the player plate. Uniform extrusion pressure can be obtained throughout the molding port, and the molding port of the die can be made into the same shape as the molded product. This method has the advantage of reducing die manufacturing costs, streamlining work, and simplifying design.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an embodiment of the present invention;
Fig. 2 is an enlarged perspective view of an embodiment of the above die and breaker plate, and Fig. 3 is a longitudinal cross-sectional view of the breaker plate same as above, where 1 is the die, 2 is the molding opening, and 3 is the breaker plate. plate, 4
5 is a synthetic resin outflow port, 5 is a synthetic resin extruder, and 6 is an extrusion port.

Traditional map Figure 2 Traditional 3 illustrations

Claims (1)

[Claims] 1. A molding port is drilled in the die for synthetic resin extrusion molding, and synthetic resin outlet ports with different diameters are drilled in the breaker plate for adjusting the flow rate of synthetic resin, and the connection between the extrusion port of the synthetic resin extruder and the die is A breaker plate is held in between, and a small-diameter synthetic resin outlet is placed opposite the large cross-sectional area of the molding opening of the die.
A synthetic resin outflow control device consisting of a large-diameter synthetic resin outflow port facing a portion with a small cross-sectional area.