SU927511A1 - All-purpose module for pressure-moulding - Google Patents

Description

The invention relates to the processing of plastics into products in removable injection molds on presses top working pressure.

A known block for injection molding for presses with an upper working cylinder, comprising a piston, an upper heating plate and a loading chamber and tacks placed therein, a “lower heating plate and an ejection system [13.

However, it requires all molds of the same dimensions in terms, which leads to an unjustified increase in the metal consumption of equipment ;.

Closest to the proposed is a universal molding unit. compression with a lower loading chamber, comprising a movable upper heating plate, a fixed base plate, a lower heating plate placed on it, and a loading chamber with a piston. Pressing on the block is performed from the lower cylinder of the press [2}.

However, it requires all the molds to be of the same size in plan, which leads to an increase in the metal consumption of the molds, but a more significant drawback is that the work can be performed on a press with low pressure of high power, as well as the fact that it is impossible to use this unit is on the press with the upper working cylinder. The need to use a block with a lower loading chamber can be caused by the design of the product, for example, with reinforcement, in which it is necessary to supply material from below, or in order to simplify the design of the mold.

The purpose of the invention is the expansion of technological capabilities by providing the possibility of using it on a press with an upper working cylinder.

927511 4.

This is achieved in that a universal injection molding unit with a lower loading chamber, comprising a movable upper heating plate, a fixed support plate, a lower heating plate placed on it, and a loading chamber with a piston, is equipped with L-shaped levers connected to the upper heating plate by means of rods placed on the 10 lower heating plate by fixed stops and supporting strips spring-loaded relative to them, moreover, a stop is made on the horizontal arm of each L-shaped lever and the ball is fixed 15 a spring-loaded cam, and the vertical arm of the lever is made in the form of a wedge · having an inclined surface on the outside of the lever, and the support bars are made with a through hole for the wedge, while the piston is fixed in the base plate, and the loading chamber is mounted to move along the piston. 25

And also the fact that the rods are made in the form of gear racks, and the L-shaped levers are made with protrusions interacting with the gear racks.

In FIG. 1 shows a block, a longitudinal section, on the left ~ at the moment of cam interaction with the loading chamber, and on the right - at the moment of the mold approaching the loading chamber; in FIG. 2 - the same, on the left - at the moment of ₃₅ holding the block under pressure, on the right - during the opening of the block.

The universal block contains a movable upper heating plate 1 with mold clamps 2 installed in it, attached to its ends of the rod, made in the form of gear racks 3, L-shaped levers 4, a fixed stop 5 is made on the horizontal arm of each L-shaped lever, pivotally on axis 6, a cam 7 is fixed and a spring-loaded movable stop 9 is installed, and the vertical arm of the L-shaped lever is made with protrusions 10 interacting with the teeth of the rack 3, and at the end in the form of a wedge having an inclined surface with an external side s arm.

The L-shaped lever is mounted on the rail 3 with a screw 11.

The block also contains a lower heating plate 13 located on the base plate 12, on which the fixed stops 14 are mounted and spring-loaded relative to them by springs 15 placed in the stops 14, support strips 16 made with a through hole for the wedge. In the transverse groove of the base plate 12, a replaceable piston 17 is mounted on a spring-loaded retainer 18, a loading chamber 19 is installed on the piston 17 with the possibility of movement along it, having bevels on the lower part and on the lower part and on the top diametrically opposite collars with bevels', such as bevels on camera.

The block works as follows.

A loading chamber 19 is mounted on the piston 17, supported from below by the ledges of the support strips 16 and filled with press material, and then a mold is installed between the heating plate and horizontal shoulders of the L-shaped levers 4 and the press informs the movement to close. In this case (Fig. 1 left side), the cam 7 rises, turning around the axis 6, and when the stop 9 is pressed, it slides along the Zurta of the loading chamber 19, and passing it straightens, while the wedge of the vertical shoulders of the L-shaped levers 4, touching the inclined the surface of the through hole of the support plate 16, squeezes it, thereby providing. lowering of the loading chamber 19, in which the working material of the mold is filled with press material.

At the end of the exposure time of the mold under pressure include a press for opening. Carrying up the mold, the unit detaches the gate, · due to the dovetine groove of the piston 17, the cams 7 raise the loading chamber 19 by the shoulders, separating it from the piston 17, the support bars 16, released from pressing by the L-shaped levers 4, return to the original position. Then, the mold and the loading chamber 19 are removed from the block, and the pressostat is knocked off the piston 17.

From this moment, the duty cycle repeats.

Claims (2)

This invention relates to the processing of plastics into articles in removable injection molds on presses. upper working pressure. A block for molding presses for presses with an upper working cylinder is known, comprising a piston, a top, a new heating plate and a loading chamber and clamps placed therein, a lower heating plate and an ejection system tl 1. However, it requires all the same molds from all the molds in the plan, which leads to an unjustified increase in the metal capacity of the rigging. The closest to the offer is a universal molding molding unit with a loading chamber containing a movable upper heating plate, a fixed base plate. , placed on it the lower heating plate, and the loading chamber with a piston. The pressing on the block is made from the lower cylinder of the press 21. However, it requires all the molds of the same dimensions in the plan, which leads to an increase in metal working of the molds, but a more significant disadvantage is that the work can be done on the press with lower pressure high power, and also the fact that it is impossible to use this block on a press with the top working cylinder. The need to use a unit with a lower loading chamber may be caused by the product design, for example, with reinforcement, in which it is necessary to feed the material from below, or to simplify the form design. The purpose of the invention is the expansion of technological capabilities due to the possibility of using it on a press with an upper working cylinder. This is achieved by the fact that a universal injection molding unit with a lower loading chamber, containing a movable upper heating plate, a fixed support plate, a lower heating plate placed on it, and a piston loading chamber, are connected to the upper heating plate by means of - with different levers placed on the lower heating plate with fixed stops and spring-loaded supporting arms with respect to them; moreover, a stop is made on the horizontal arm of each L-shaped lever and hinged under dinner fist, and the vertical lever arm is made in the form of a wedge, which has an inclined surface on the outer side of the lever, and the support bars are made with a through hole for the wedge, while the piston is fixed in the support plate, and the loading chamber is mounted for movement along the piston, as well as the fact that the ti gi are made in the form of toothed racks, and the l-shaped levers are made with protrusions interacting with the toothed racks. FIG. Figure 1 shows a block, a longitudinal section, on the left at the time of the interaction of the cam with the loading chamber, and on the right, at the moment the mold approaches the loading chamber; in fig. 2 - the same, on the left - at the time of holding the block under pressure, on the right - during the opening of the block. The universal block contains a movable upper plate 1 of heating with mold clamps 2 installed in it, attached to its ends ti, made in the form of toothed rails 3, L-shaped levers C, on the horizontal arm of each G-shaped lever there is a fixed stop 5, pivotally On axis 6, a cam 7 is fixed and a movable stop 9 spring-loaded 8 is mounted, and the vertical arm of the L-shaped lever is made with protrusions 10 interacting with the teeth of the rail 3 and at the end in the form of a wedge having an inclined surface armor levers. The L-shaped lever is attached to the rail 3 by screw 11. The block also contains a lower heating plate 13 placed on the base plate 12, on which the fixed stops 1 and springs 15 spring-loaded relative to them fixed in the stops I are fixed to the support 16, made with a through hole under the wedge. In the transverse groove of the support plate 12, a replaceable piston 17 is mounted on a spring-loaded retainer 18, on the piston 17 it is possible to move along it a loading chamber 19, having bevels on the lower part and on the lower part and at the top, diametrically opposite shoulders with bevels, the same as the bevels the camera. The unit works as follows. A boot 19 chamber is supported on the piston 17, supported from below by ledges of the support bars 16 and filled with a press material, and then a mold is placed between the heating plate and horizontal arms of the L-shaped levers 4 and the press is informed about the closing movement. At the same time (srig, 1 left side), the cam 7 rises up, rotates around axis 6, and with the depressed support 9, slides along Durth of the loading chamber 19, and after passing it straightens, the wedge of vertical arms of L-shaped levers k, contacting with the inclined surface of the through-hole of the support bar 16, squeezes it, thereby ensuring the lowering of the loading chamber 19 at which the mold material is filled with the press material. At the end of the exposure time of the mold under pressure include a press on the disclosure. Flying up the mold, the block tears off the sprue, at the expense of the swallow slot of the piston 17, the cams 7 raise the loading chamber 19 behind the shoulders, separating the piston 17, the support bars 16, released from being pressed by the L-shaped levers i, return to the initial position . Then, the mold is removed from the block and the loading chamber 19, -a, the pressure gun is knocked down from the piston 17. From this point on, the duty cycle is repeated. Claim 1. Universal injection molding unit with a lower loading chamber containing a movable upper heating plate, a movable support PLATE, a lower heating plate placed on it, and a loading chamber with a piston, characterized in that, in order to expand technological capabilities due to enabling it to be used on a press with an upper working cylinder, it is equipped with L-shaped levers connected to the upper heating plate by means of tg, placed on the lower heating plate porami.i onositelno .nih spring-loaded support straps, and on the horizontal arm of each L-shaped lever abutment configured and pivotally mounted spring-loaded cam, and vertical lever arm is designed as a wedge. having an inclined surface on the outer side of the lever, and the support bars are made with a through hole under the wedge, with the piston fixed to the base plate, and the loading chamber is mounted for movement along the piston. 2. The unit according to claim 1, characterized in that in the form of gear racks, and L-shaped levers are made with protrusions that interact with the rack racks. Information sources, . taken into account in the examination 1. Demin E.M. Handbook of press 1967, p. 191. forms. Lenizdat, Handbook of Press2. Demin, E.I. forms. Lenizdat, 19b7, p. 190 (prototype). tJ F / Er ± 1 fHi.1 G & F