SU856840A1 - Injection mould for producing rubber-cord envelopes - Google Patents

Description

(54) PRESS FORM FOR THE MANUFACTURE OF RUBBER SHELLS

The invention relates to the manufacture of α-rubber shells and can be used to make iodine by pressure molding rubber shells in the manufacture of tires and rubber technical products. A known mold for the manufacture of rubber casings, comprising a lower and upper half-form, a vertically movable separable core and a drive for reciprocating movement of the core l. However, in a known mold, a reciprocating movement of the core is mounted out. The result is that the mold has significant dimensions. A mold is known, comprising a lower popup with a central otvergnem, a movable upper shape, a paabsh jibdi core with an upper part having a guide sleeve with sockets on the bovsA surface, and with a lower part having a central cylindrical shank facing through the lower half-form radial hphoresis, mounted in the central hole of the lower half of the power qilin mold) to move the core and clamps G21 However, in a known mold, the guide sleeve is installed on the upper end of the upper The main part is connected to the power cylinder rod, and its shank is connected to the liner installed in the bottom half-form by means of ball clamps, which complicates the design of the mold and does not require It provides for the fixation of parts of the inserts and half-molds necessary for reliable operation. The purpose of the invention is to simplify the design of the mold and increase reliability. This goal is achieved by the fact that in a mold for the manufacture of rubberized shells containing the lower half. a form with a central hole, a movable emu upper popufs, a split core with an upper part having a guide sleeve with sockets on the lateral surface, and a lower part, have a central cylindrical shaft with through radial slots facing the lower puffer belt the bore of the lower poiform of the power cylinder for moving the core and clamps, the upper part of the core is connected with the rod of the power cylinder, the guide sleeve is installed on its lower end and concentrically located between the body of the power cylinder and the central cylindrical shank, and the latches are made in the form of hinged levers on the shank, which interact with free ends with radial slots and sockets, and with straight lines with a side surface of the center hole of the half-form, with the side surface of the latter it is made with a cylindrical section equal in length to the joint motion of the upper and lower parts of the core. FIG. 1 shows the proposed press f; RMA in closed position; in fig. 2 - the same plan view; in fig. 3 is a section A-A in FIG. 2 (rotated) ;. in fig. 4 - a mold in the odement of removal of the shell from the heart, the combined cuts A-A and B-B in FIG. 2; in fig. 5 same, at the time of removal of the casing from the heart. The mold for the manufacture of reeenovki shells contains a movable upper mold 1 with a punch 2 and a steam chamber 3 n lower mold 4 with a casting chamber 5 (Fig. 4), a central hole 6 and a steam chamber 7, On the lower mold 4 by means of the axes 8 ball Two paws 9 are nirinally mounted. The mold has a split core formed by the upper 10 and lower 11 parts. The lower part 11 has a central cylindrical shank 12 with radial through slots 13 facing the lower half-width, and the upper part 10 has a guide 14 installed at its lower end with sockets 15 (Fig. 4) on its lateral surface located concentrically between the shank 12 and a power cylinder 16 for moving the core mounted in the central hole 6 of the bottom half of the mold 4 and rigidly connected to the front. The shock cylinder 17 of the power cylinder is connected by the top 10 of the core. The mold has locks made in the form of pivotally mounted and with the shank 12 levers 18, which interact with free ends about the radial slits 13 and the sockets 15, straight lines f with the lateral surface of the central hole of the bottom half-form. The lateral surface of the nest 6 is made with a cylindrical part equal in length to the joint ode of the upper Yu and lower 11 parts of the baffle. Shank 12 has stops 19 of FIG. 3) the surfaces of the shank located on the side between the levers 18 and interacting with the fixed stops 29 mounted on the lower hemisphere 4. The distance between the lugs 19 20 is equal to the length of the joint of the upper and lower parts of the core. The mold is working as follows. Before starting work, when raising the upper mold half 1, an annular rubber compound or other elastomer is loaded into the casting chamber 5 of the upper mold half. When lowering the top half-form 1, the punch 2, acting on the rubber mixture, presses it into the cavity formed by the half-forms 1 and 4 and the core. After the mold is completely closed, the process of vulcanization of the obtained shell 21 begins. After termination of the vulcanization, the upper mold half rises and the power cylinder 16 is turned on to lift the heart of the cylinder. This obdiochka 21, sandwiched between the top semis and my ver. The core of the core 1O rises and detaches from the lower mold half 4. When the top 10 of the core is lifted by the stem 17 of the power cylinder 16, the arms 18, due to the interaction of the straight sides with the cylindrical portion of the side surface of the hole 6, are held in a position where their free ends d, through radial presses 13, go into the sockets 15 of the sleeve 14, as a result of which the lower part 11 of the core is fixed relative to the upper part 1O and moves upwards along with the latter. GFI further joint lifting of both parts of the core and the upper half-form 1 stops 19 on the lower part of the bridge .12 lower part 11 of the core

reach fixed stops 2O on the lower popup. When the lugs 19 and 20 interact, the lower part 11 of the core stops at a position where the straight sides of the cG levers exit from the opening 6 and the levers 18 turn vertical; planes from the center of the mold due to the ejection of their KShts C1 to the inclined surfaces of the sockets 15 of the sleeve 14.

With a further course of the upper polufor. We 1 and the upper core 10 of the core and the ends of the levers 18 slide along the cylindrical surface of the sleeve 14. To ensure that the lower half of the mold 4 is cleared of possible pressing out of the vulcanized elastomer, the lower part 11 of the core is fixed in the upper position by resting the levers 18 with the free ends d into the side surface of the sleeve 14, and the straight sides - in the edge of the hole 6.

Upon further upward movement of the upper half-mold 1 and the upper part 1O of the core, the lower bead of the shell 21 is stretched out onto the cylindrical surface of the lower part 11 of the core. At this moment, using its stroke, the rod 17 of the power cylinder 16 stops, the power cylinder turns off and the upper half-form rises further.

The compressed air is blown to the forming surface of the lower half-mold 4. After that, under the lower bead of the shell 21, the paws 9 are pressed against the surface of the heart. The power cylinder 16 is turned on. The stem 17 lowers. part 1O of the core 10 together with the shell 21. In this case, the shell is removed from the upper part of the core by means of the paws 9 and remains on them. At the same time, the free ends d of the arms 18 slide along the surface of the sleeve 14 until they enter the slots 15. After the ends C1 enter the slots 15, the upper and lower portions of the core are lowered to the bottom dead center. The shell 21 is removed from the paws 9 by hand. Paws divorce mc in

initial position. The mold is ready to recycle.

The proposed mold is easy to manufacture and operate.

Claims (2)

1. USSR author's certificate NO 389948, cl. B 29 H 5 / O2, B 29 H 3 / O8, 1971. 2. USSR author's certificate for application No. 2486О71 / 23-О5, cl. In 29 N 5/02, 1977 (prototype). Reea (H Vu & .S