RU167714U1 - Multi-cavity stationary mold with horizontal and vertical injection molding connectors - Google Patents

Abstract

The utility model relates to designs of multi-cavity injection molds. The utility model will improve the quality of products molded in the mold, the mold will be simpler to manufacture, more reliable and durable in use and less time-consuming to repair. Multi-seat stationary mold with horizontal and vertical injection molding connectors, consisting of movable and fixed parts, two half-matrices with an external conical (or wedge) surface, clips for closing semi-matrices with an internal conical (or wedge) surface and signs forming holes in the products, in the direction of closing the mold. The half-matrices are automatically driven into reciprocating motion when the mold is closed and opened by inclined guide columns installed in a fixed clamping cage and entering the half-matrix into the corresponding inclined holes with a gap of 1 ... 2 mm, since the half-matrices are mounted movably in the L-shaped guides slats and are centered on the movable plate of the mold, while the angle of inclination of the outer conical (or wedge) surface of the half-matrices, the angle of inclination of the internal conical (or wedge) surface and clamping cages, the angle of inclination of the guide columns and the angle of inclination of the holes of the half-matrices are the same, moreover, input chamfers with dimensions of 5 mm are introduced into the design of the half-matrices and into the design of the clamping cage. × 45 ° min., And to fix the semi-matrixes in the open state, special clamps and stops were introduced into the design of the mold. The utility model relates to technological equipment used in the processing of thermoplastic

Description

The utility model relates to technological equipment used in the processing of thermoplastic materials by injection molding in the manufacture of products with protrusions, recesses or holes, the direction of which does not coincide with the direction of the axis of the mold.

A known mold (Leikin N.N. Designing molds for products from plastics. - L .: Mashgiz, 1961 - 168 p.: Ill.), Which consists of a movable and fixed parts, two half-matrixes containing an outer wedge the surface in contact with the inner wedge surface of the cage holding the half-matrix in a closed state, the mechanism for bringing back-and-forth movement of half-matrixes, signs, forming holes in the products in the direction of closing the mold. The contacting surfaces of the half-matrices and cages are interconnected by means of inclined T-shaped protrusions on the half-matrices and grooves on the cage. Semi-matrix pushers are attached at one end to the ejection disk, mounted at the other end in the guide sleeve and made in the form of a T-shaped protrusion that fits into the corresponding groove of the semi-matrix, with the freedom to move the semi-matrix in the direction perpendicular to the axis of closure of the mold. When the ejection disk moves, pushers and half-matrices move with it. The semi-matrices are pushed out of the cage and moved apart in relation to each other. After the half-matrices are fully opened, the products are removed from the signs manually. The disadvantages of this mold are: the complexity of manufacturing, low reliability, durability, performance.

Closest to the proposed solution in terms of technical nature and the achieved result is a mold according to the patent for invention RU No. 2475357 dated 07/20/2011, which consists of a movable and fixed parts, pushers, two half-matrixes having an external conical (or wedge) surface in contact with the inner conical (or wedge) surface of the cage holding the half-matrix in a closed state, the mechanism for bringing the half-matrices into the reciprocating movement, signs forming holes in the direction of closing ess molds in the products in the direction of closing the mold, the half-matrixes are interconnected using two guide pins, and the pushers are fastened, each with one end with half-matrixes and are installed at an angle in the guide bushings, symmetrically with respect to the axis of the mold, while the angles the outer conical (or wedge) surface of the semi-matrices, the angles of the inner conical (or wedge) surface of the clamping ring are the same and 3 ... 4 ° greater than the angle of inclination of the pushers. This mold is selected for the prototype. The disadvantages of this mold are: the complexity of manufacturing, low reliability, durability, performance.

The technical task of developing a utility model was the creation of such a mold design for processing thermoplastic materials by injection molding, in the manufacture of products with protrusions, recesses or holes, the direction of which does not coincide with the direction of closure of the mold, which will be easier to manufacture, more reliable and durable in operation and less time consuming to repair.

This is achieved by the fact that in the mold, consisting of a movable and fixed parts, two half-matrices with an external conical (or wedge) surface, clips for closing half-matrices with an internal conical (or wedge) surface and signs forming holes in the products in the closing direction molds, half-matrixes are automatically driven into reciprocating motion when closing and opening the molds with inclined guide columns installed in a fixed clamping sleeve and included in the half-matrix according to inclined holes with a gap of 1 ... 2 mm., since the half-matrices are mounted movably in the L-shaped guide rails and are centered on the movable plate of the mold, for smooth operation of the mold in the design of the movable half-matrices and in the design of the stationary clip for closing the half-matrices, input chamfers, dimensions of lead-in facets 5 mm. × 45 ° min, and for fixing the semi-matrixes in the open state, special clamps and stops were introduced into the design of the mold.

The essence of the utility model consists in the fact that in the proposed mold, movable half-matrices with an external conical (or wedge) surface are automatically driven into reciprocating motion when the mold is closed and opened by inclined guide columns installed in a stationary holder for closing the half-matrices with the inner conical ( or wedge) surface and included in the half-matrix in the corresponding inclined holes with a gap of 1 ... 2 mm., since half-matrix mounted movably in the L-shaped guides nets and are centered on the movable plate of the mold, while the angle of inclination of the outer conical (or wedge) surface of the half-matrix, the angle of inclination of the inner conical (or wedge) surface of the clamping ring, the angle of inclination of the guide columns and the angle of inclination of the holes of the half-matrix are the same, for smooth operation of the press -forms in the design of movable half-matrices and in the design of a stationary holder for closing the half-matrices are introduced bevels, the dimensions of the bevels are 5 mm. × 45 ° min, and for fixing the semi-matrixes in the open state, special clamps and stops were introduced into the design of the mold.

The essence of the proposed solutions is illustrated by drawings.

In FIG. 1 shows the mold in the open state along the axes of the inclined guide columns.

In FIG. 2 shows the mold in the open state along the axes of the signs forming the holes in the products, in the direction of closing the mold (section AA).

In FIG. 3 shows the mold in closed state along the axes of the inclined guide columns.

The mold consists of movable and fixed parts, which are centered relative to each other by guide columns 17 mounted in a fixed clamping sleeve and included when closing the mold into sleeves 16, which are installed in the movable plate 11. The movable part contains movable half-matrix 4 with the outer conical (or wedge) surface 6 and inclined holes 5, the movable half-matrix move in the L-shaped guide plates 13 and are centered on the movable plate 11 of the mold, while the movable half-matrix they move when opened to the stops 7 and in this position are fixed by spring-loaded latches 8. In the movable plate there is a sign holder 9 with signs 12 and a removal plate 10, which is set in motion by rods 14, the rods move in the bushings 15 that are installed in the movable plate 11. The fixed part contains a stationary clamping sleeve of the semi-matrices 1 with an internal conical (or wedge) surface 3, inclined guide columns 2 installed in a stationary clamping sleeve of the half-matrices 1 and the central sprue bushing 18. l tilt inner conical (or wedge) surface of the clamping cage, the angle of inclination of the guide columns and holes angle jaws is identical, and equal to and is assigned based on structural considerations in the range of 15 ... 25 °. For smooth operation of the mold, the input chamfers 19 are introduced into the design of the movable semi-matrices, the input chamfers 22 are introduced into the design of the stationary clamp holder for closing the semi-matrices, the dimensions of the input chamfers are 5 mm. × 45 ° min., And a lead-in cone 21, the value of which β = 7 ... 10 °, and a lead-in sphere 20, of radius R, the value of which is selected based on design considerations, was introduced into the design of the inclined guide columns.

The mold works as follows. A portion of the thermoplastic melt is injected into the closed mold through the central sprue bushing 18 and through the sprue channels fills the cavity forming products, which are formed by closed movable half-matrices 4 and signs 12. After the casting has hardened, the mold opens, and the inclined guide columns 2 exit the inclined holes 5, movable half-matrix 4 and push the latter, as they slide in the L-shaped guide strips 13 and are centered on the movable plate 11 of the mold, while casting out one of the movable half-matrices 4 and remains on the signs 12. After the inclined guide columns 2 completely exit the inclined holes 5, the movable half-matrix 4 reach the stops 7, stop and are fixed in this position by spring-loaded clamps 8, then the mold is opened on the value necessary to remove the casting stops and then the force from the central hydraulic ejector of the injection machine is supplied to the removal plate 10 through the rods 14 and the casting is removed from the signs 12 of the removal plate 10. After ak casting is removed from the mold, the central ejector hydraulic injection molding machine is returned to its initial position and transfers this force rods 14 on plate 10 detachably to its return to the starting position, thereafter the mold closes and the process repeats.

A multi-cavity stationary mold with horizontal and vertical connectors for injection molding of products such as a connector for connecting subversive initiating devices with protrusions, recesses and holes, the direction of which does not coincide with the direction of closure of the mold was manufactured at the Iskra NMZ JSC and passed tests confirming its performance, reliability and durability in operation.

Claims (3)

1. A multi-cavity stationary mold with horizontal and vertical connectors for injection molding, consisting of a movable and fixed parts, two half-matrixes with an external conical or wedge surface, clips for closing semi-matrixes with an internal conical or wedge surface and signs forming holes in the products, in the direction of closing the mold, characterized in that the half-matrix is automatically driven into reciprocating motion when the mold is closed and opened by inclined guide rails with the installed in a fixed clamping sleeve and entering the half-matrix into the corresponding inclined holes with a gap of 1-2 mm., since the half-matrix is mounted movably in the L-shaped guides and centered on the movable plate of the mold, while the angle of inclination of the outer conical or wedge the surface of the semi-matrices, the angle of inclination of the inner conical or wedge surface of the clamping sleeve, the angle of inclination of the guide columns and the angle of inclination of the holes of the semi-matrices are the same, moreover, in the design of the semi-matrixes and in the design of the clips clamping administered zahodnye chamfer with dimensions of 5 mm × 45 ° min, and for fixing jaws in the open state in the mold design incorporated latches and stops. 2. Multi-cavity stationary mold with horizontal and vertical connectors for injection molding according to claim 1, characterized in that the inclined guide columns have a lead-in cone, the value of which is 7-10 °. 3. Multi-seat stationary mold with horizontal and vertical connectors for injection molding according to claim 1, characterized in that the inclined guide columns have a lead-in radius sphere.

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