MXPA96002600A - Device for shaping glass tubes - Google Patents

Abstract

In order to shape the necks of glass tubes (1) on glass processing machines, use is made of a device with two shaping tools, one of which takes the form of a ring (3) surrounding the glass tube (1) and the other shaping tool consisting of a roller (2).

Description

Device for shaping glass tubes The invention relates to a device for modeling or shaping glass tubes, with two tools for modeling or shaping, which can be placed in a rotating movement and which can be pressed in directions opposite against the circumference of the soft glass tube, to produce a contraction of the glass tube, the contraction corresponds to its profile. In glass processing machines for producing small bottles from a glass tube, devices of the type mentioned above are used to shape the neck of the bottles. In a relevant device known as DE 17 96 199 B2, the form rollers are placed in pairs and held by crane arms that move back and forth in opposite directions and which, during the forming process, they move forward on the longitudinal axis of the glass tube in such a way that the latter is gripped in a manner similar to that of a pair of tweezers, using the modeling roller or roller to shape it. During modeling, the essential linear contact occurs between the modeling rollers and the glass tube which softens due to the heat. As experience has shown, irregularities in the glass tube, particularly fluctuations or variations in the thickness of the walls, can result in the actual shape of the neck of the bottle, deviating from the desired shape to a degree considerably greater than that allowed . The objective on which the invention is based, is to face the possibility to improve the accuracy of the form of relevant devices. The stated objective is achieved in accordance with the present invention, in that, in such a device, one of the two tools for shaping a glass tube is designed as a ring surrounding the glass tube and the other tool Modeling is made up of a roller. The device, according to the invention, offers the advantage that it reacts or changes in accordance with the deviation or variation in the desired dimensions of the glass tubes, less sensitively than the known devices. The reasons for the improved mode of operation may seem, which is the region of contact between the tool for shaping which is designed as a ring and soft glass tube, by lengthening the contact region, in relation to the linear contact, and the reduction of the angle and the region of the gap, in the form of an edge, between the inside car of the exterior shaping tools and the outer car of the glass tube. Additional details and features of the invention arise from the subclaims and from the following description of the accompanying drawings. In these: Figure 1 shows a diagrammatic side view of a device, in partial section, and Figure 2 shows the top view of the device according to Figure 1, likewise in a partial section. In Figure 1, a glass tube is denoted, from which the small glass bottles are produced in a known glass processing machine. The figures show the position of the modeling or shaping tools, which are used to produce the neck of the glass tube 1, in the '* end of the modeling operation. The modeling tools are formed by a roller 2 and a ring 3 that surrounds the roller 2. A rotary movement is imparted to the roller 2, by means of an electric motor (not shown), through an axis 4, while three driving rollers 8, 9 and 10 rotate in the same direction in the direction of the arrows 7, which serves to drive the ring 3 in the direction of the arrow 6, the conducting rollers support the ring 3 and are driven together by a additional electric motor (not shown), the rotation speed of the motors, which are used to drive the roller 2 and the ring 3, are controlled in such a way that the movement of the roller occurs between the tools to shape and the glass tube 1. The axis 4 of the roller 2 is mounted on a guide 12 movable forward and backward in the direction of the double arrow 11, while supporting the axes 13, 14 and 15 of the rollers conductors 8, 9, 10 and of the ring 3, each mounted on a guide 17 to thus move in the direction of the double arrow 16, in opposition to the movements of the guide 12. The two guides 12 and 16 can be moved further up and down in the direction of the arrow. Double 19, by means of a lifting guide 18. The guides 12, 17 and 18 are guided by the mechanisms known per se, the illustration and description of these it can, consequently, be dispensed. During the shaping operation, an andrin 20 penetrates the end of the lowest opening of the glass tube 1, in the generally known and conventional manner.

Claims (7)

1. Claims: H > 1. A device for shaping a glass tube, with two modeling tools, which can be placed in a rotating movement and which can be pressed in opposite directions, against the circumference of the soft glass tube, in order to produce a contraction of the glass tube, the contraction that corresponds to its profile, where one of the two modeling tools is designed as a ring (3), which surrounds the glass tube (1) and another modeling tool that it is formed by the roller (2). * 2. A device according to claim 1, wherein the modeling tool is formed by a ring (3) that is supported by at least three conductive rollers (8, 9, 10), which are distributed over the circumference of the ring. 3. A device according to claim 1 or 2, wherein, the axes (13, 14, 15) of the conductive roller (7, 8, 9), for the modeling tool that is designed as a ring (3). ), are mounted on a guide (17) that can perform forward and backward movements in a direction perpendicular to the longitudinal axis of the glass tube (1). The device as claimed in one or more of claims 1 to 3, wherein the axis (4) of the modeling tool is designed as a roller (2) which is mounted on a guide (12) , which can perform forward and backward movements in a direction perpendicular to the fe l - longitudinal axis of the glass tube (1). 5. A device according to claim 3 or 4, wherein the two guides (12, 17) can execute opposing movements. 6. A device as claimed in one or more of claims 1 to 5, wherein the modeling tools (2, 3) can be moved up and down by the mechanisms of a lifting guide ( 18) 7. A clamping device is claimed in one or more of claims 1 to 6, wherein a mandrel - (20) can be inserted into the hole of the glass tube (1). In compliance with article 47 of the Industrial Property / I declare in the name of the applicant / and under protest to tell the truth / that the method described here is the best known by her to carry out the invention contained herein. IN FAITH OF WHICH, I sign the present in Mexico City, D.F. / today to three days of the month of July of one thousand nine hundred and ninety six. HANS-JOACKIM DICHTER.