SU1353628A1 - Multiple-nozzle tip for casting machines - Google Patents

Abstract

This invention relates to injection molding plastics. The purpose of the invention is to expand the technological capabilities and reduce the complexity of manufacturing the mouthpiece and molds. For this, the nozzles are stepped and mounted axially movable. The body has a cavity with solid spherical bodies. Smaller steps of nozzles stirring, from the side of the mold. Large steps interact with solid spherical bodies. The mouthpiece is equipped with an adjusting screw for interacting with solid spherical bodies and fixed screws. This reduces the laboriousness of manufacturing the mouthpiece and the mold, expanding the technological capabilities of the mouthpiece due to the fact that during operation the nozzles are automatically exposed. The tight fit of the spherical surfaces of the nozzles to the surfaces of the molds is ensured. An adjustment screw allows you to quickly adjust the length of the nozzles. The locking screws limit the movement of the nozzles. The mouthpiece can be used with molds of various designs. 6 Il. e L oo sd oo O5 Yu 00

Description

one

This invention relates to the injection molding of polymeric materials.

The purpose of the invention is to expand the technological capabilities and reduce the complexity of manufacturing the mouthpiece and molds.

FIG. 1 shows a mouthpiece and a working robot, and with it a mold in the initial position; in fig. 2 - the same, in the process of work in the case when the surfaces of the spheres of the mold in contact with the nozzles of the mouthpiece are made with a low degree of accuracy; in fig. 3 - a mouthpiece with the smallest length of nozzles and a mold working with it; in fig. 4 - the mouthpiece with the greatest length of nozzles and the mold working with it; in fig. 5 - mouthpiece with different length of nozzles and a mold with it; in fig. 6 - mouthpiece with a dead gate and working with it the mold.

The multi-nozzle mouthpiece for injection molding machines comprises body 1 with gating channels 2, nozzles 3 and 4 with gating channels 5 and 6. Gating channels 5 and 6 nozzles 3 and 4 are connected with gating channels 2 cases. In the housing 1, a cavity 7 is made, filled with solid spherical bodies 8, nozzles 3 and 4 are stepped and mounted movable in the axial direction.

The large stages 9 and 10 of the nozzles 3 and 4 interact with the bodies of the spherical bodies 8. The smaller stages 11 and 12 of the nozzles 3 and 4 are made with spherical surfaces at the ends. The mouthpiece is provided with an adjusting screw 13 for interacting with solid spherical bodies 8 ,. and on the side of smaller stages 11, and 12 - with fixing screws 14 and 15 to restrict the movement of nozzles 3 and 4. Screws 16 serve to fasten the casing 17 to the body 1. The mouthpiece works with a mold 18 equipped with a spherical surface gating system 19 and 20. Smaller stages 11 and 12 of the nozzles 3 and 4 are located on the side of the mold 18. The distance from the mouthpiece body 1 to the spherical surface of the lower stage 11 of the nozzle 3 - / i, the distance to the spherical surface of the lower stage 12 of the nozzle 4 - /but.

The operation of the mouthpiece, in the case when the spherical surfaces of the mold in contact with the nozzles of the mouthpiece are made with a low degree of accuracy, is carried out as follows.

The mouthpiece attached to the injection molding machine, in the initial position, is retracted from the mold 18, the fixing screws 14 and 15 are loosened, the adjusting screw 13 is in the middle position (Fig. 1). In this position, the nozzles 3 and 4 are exposed with an error D / / | - / o.

The depth of the spherical surface 19 of the mold 18 is L, and the depth of the sphere

2

cic surface 20 - Ly. The accuracy of the spherical surfaces 19 and 20 AL L | -L2.

Before the injection of polymeric material into the mold 18, the mouthpiece is guided to the hess mold. 18, while the nozzle 3 abuts the spherical surface of the smaller step 11 into the spherical surface 19, as a result, the nozzle 3 moves in the axial direction. Large stage 9 nozzles 3 in

10 turns on the solid spherical bodies 8, which, moving in the cavity 7, transfer the pressure to the greater stage 10 of the nozzle 4, moving the nozzle 4 by the amount of A / + AL until the spherical surface of the smaller stage 12 of the nozzle 4 stops

 the spherical surface 20 of the mold 18. Thus, the spherical surfaces of the smaller stages 11 and 12 of the nozzles 3 and 4 of the mouthpiece are tightly attached to the spherical surfaces 19 and 20 of the mold 2 of the mold 18 {Fig. 2). After that, the fixing screws 14 and 15 are tightened to the stop with large steps 9 and 10. The mouthpiece is ready for operation. Then through the gating channels 2 and the gating channels 5 and 6 of the nozzles 3 and 4 communicated with them to the press 25 the form 18 is fed under pressure poly-. dimensional material.

In the case of a decrease in the length of 1 and / 2 of the nozzles 3 and 4, the tuning of the mouthpiece is carried out as follows. The adjusting screw 13 is twisted to the right position,

30 and fixing screws 1. and 14 tighten them, moving nozzles 3 and 4 to the right position. Solid spherical bodies 8 in this case are displaced from cavity 7 into the cavity formed in housing 1 when the adjusting screw 13 is unscrewed (Fig. 3).

If it is necessary to increase the length (I and / 2 of nozzles 3 and 4), the mouthpiece is adjusted as follows. The locking screws 14 and 15 unscrew in

x | Q left position, after which the adjusting screw 13 is twisted, the solid spherical bodies 8 are displaced from the cavity 7, which in turn presses on the greater stages 9 and 10, moving the nozzles 3 and 4 to the left position (Fig. 4).

45 If it is necessary to obtain a mouthpiece with different nozzle lengths, the mouthpiece adjustment is carried out in the following way. In the initial position, the nozzle 3 is set to the desired length. This position is fixed with a fixing screw.

50 14, and the locking screw 15 remains twisted to the left position. Then, the adjusting screw 13 is twisted, the solid spherical bodies 8 are displaced from the cavity 7, which in turn presses on a large, step 10 of the nozzle 4, moving it to the required value (Fig. 5). In a position where the length of the nozzle 4 reaches 1/2, the locking screw 15 is tightened against the stop with a greater degree 10, thus limiting

nozzle 4 from moving further to the left. The mouthpiece is ready to go.

In the event that it becomes necessary to silence one of the gating channels, the operation of the mouthpiece is as follows. The locking screw 15 is unscrewed into the left position, after which the locking screw 14, the displacement nozzle 3 are twisted to the extreme right position, and the overlap is littomatically with ensuring that the spherical nozzles or cones fit snugly to the surfaces of the molds.

For the same reason, there is no need for an individual fit, and it is possible to use the same mouthpiece for several molds.

Supplying the mouthpiece with a adjusting screw that interacts with hard sphere15

20

the channel 2 of the housing 1 with lateral legal bodies, as well as fixing the top of the nozzle 3 (Fig. 6). Solid spherical bodies 8 are forced out of the cavity 7 into the cavity formed in the housing 1 when the adjusting screw 13 is unscrewed into the right position. Then tighten the locking screw 15 until it stops with a larger surface 10 of the nozzle 4. The mouthpiece is ready for operation. Before the polymer material is injected into the mold 18, the mouthpieces are brought to the mold until the nozzle 4 stops by a spherical surface of a smaller stage 12 into the spherical surface 20 of the mold 18, after which the polymer material is fed under pressure through the gates through the sprue channel. 6 of the nozzle 4 is injected into the mold 18. In the sprue channel 5 of the nozzle 3 polymeric material does not enter, because the sprue channel 2 leading to the sprue channel 5 is blocked by the side surface of the nozzle 3.

The nozzles are stepped, axially movable and interacting with solid spherical bodies, which reduces the laboriousness of manufacturing the mouthpiece and the molds working with it, since there is no need to manufacture the mouthpieces and the surfaces of the molds in contact with them. degree of accuracy. During operation, the nozzles are exposed by avvinta interacting with the nozzles, allows you to quickly adjust the length of the nozzles, which makes it possible to use the mouthpiece with molds of various designs and provides the ability to quickly stop if one or more nozzles are needed.

Claims (1)

Invention Formula A multi-nozzle mouthpiece for injection molding machines, comprising a body with gating channels and located in the nozzle body, the runner channels of which communicate with the gating channels of the body for feeding the melt to a press mold, characterized in that, in order to expand the technological capabilities and reduce the labor intensity making the mouthpiece and the molds, the nozzles are made stepped with a smaller step placed on the side of the mold, and OQ are mounted movably in the axial direction, the cavity is made in the case with solid spherical and bodies for interacting with the greater step of each nozzle, the mouthpiece being provided with an adjusting screw for interacting with solid spherical bodies and placed on the lower stage of each nozzle with locking screws to limit the movement of the nozzles. 25 35 Tomatoically, ensuring that the spherical surfaces or nozzle cones fit snugly against the surfaces of the molds. For the same reason, there is no need for an individual fit, and it is possible to use the same mouthpiece for several molds. Supplying the mouthpiece with a regulating screw interacting with solid spherical bodies, as well as fixing bodies as well as fixing screws that interact with the nozzles, allows you to quickly adjust the length of the nozzles, which makes it possible to use the mouthpiece with molds of various designs and provides the ability to quickly stop if one or more nozzles are needed. Invention Formula bodies as well as fixing A multi-nozzle mouthpiece for injection molding machines, comprising a body with gating channels and located in the nozzle body, the runner channels of which communicate with the gating channels of the body for feeding the melt to a press mold, characterized in that, in order to expand the technological capabilities and reduce the labor intensity manufacturing the mouthpiece and the molds, the nozzles are made stepped with a smaller step placed on the side of the mold, and are mounted movably in the axial direction, in the body there is a cavity with solid spherical bodies for interacting with the greater step of each nozzle, the mouthpiece being provided with an adjusting screw for interacting with solid spherical bodies and placed on the side of the lesser step of each nozzle with locking screws to limit the movement of the nozzles. 20 Lz 12 P W,  5 P IS 1 L / I / / / /five B 1 9 L 8 / / / / / S  f 12 / / V // - 6