RU138015U1 - VACUUM FORMING FORM - Google Patents

Abstract

1. A mold for vacuum molding of thermoplastic materials, comprising a forming element with through air channels and a vacuum receiver, characterized in that the mold is further provided with lower and upper flanges with central holes, as well as a spacer located between the flanges, with a central hole and through lateral air channels, and the outer contour of the flanges in plan is at least partially similar to the contour of the forming element. 2. The mold according to claim 1, characterized in that an air gap is made between the outer ends of the flanges.

Description

The utility model relates to the field of molding products from thermoplastic materials by vacuum molding and can be used in the design of molds for vacuum molding.

The technology of vacuum forming products from thermoplastic materials involves the subsequent trimming of the edges of the product.

From patent RU 108337 U1, IPC B29C 51/36, publ. 09/20/2011, the known design of the mold for vacuum forming the bonnet of a car, including a forming element made of wood.

From patent RU 2327564 C2, IPC B29C 51/36, B29C 33/38, publ. 06/27/2008, a mold design for vacuum forming automobile parts is known, including a forming element with a working layer of fiberglass impregnated with heat-resistant epoxy resin, several layers of fiberglass impregnated with ordinary epoxy resin, and with through holes, and a vacuum receiver.

For the closest analogue of the claimed utility model adopted the form for vacuum molding of products from thermoplastic materials, known from patent RU 45892 U1, publ. 06/10/2005, including a forming element made of polyester resin, reinforced with layers of fiberglass, with through holes, and a vacuum receiver.

The disadvantages of the closest analogue and the above forms for vacuum forming products from thermoplastic materials are their limited functionality, due to the lack of composition of the forms of the device to facilitate trimming the edges of the product.

The trimming of the edges of the product after vacuum molding is usually carried out on separate cutting tables, which negatively affects the complexity of manufacturing, to increase production areas and to attract additional labor for subsequent trimming of the edges of the product.

The objective of the utility model is to create a mold for vacuum molding with enhanced functionality, the design of which provides for the ability to trim the edges of the product on the mold immediately after vacuum molding.

The technical result, which the utility model aims to achieve, is to expand the functionality of the mold for vacuum molding of products from thermoplastic materials.

The specified technical result is achieved in a mold for vacuum molding of products from thermoplastic materials containing a forming element with through air channels and a vacuum receiver.

The specified technical result is achieved in that the mold is additionally provided with lower and upper flanges with central holes, as well as a spacer located between the flanges, with a central hole and through lateral air channels, and the outer contour of the flanges is at least partially similar to the contour of the forming item.

In this case, an air gap under the cutting tool can be made between the outer ends of the flanges.

The utility model is illustrated by the following images.

In FIG. 1 shows an example of a mold for a car mat.

In FIG. 2 shows details of the form shown in FIG. one.

In FIG. Figure 3 shows an example of a mold for a car mat.

In FIG. 4 shows details of the mold shown in FIG. 3.

In FIG. 5 shows an example of a mold for a car mudguard.

The positions in the images show:

1 - forming element;

2 - a vacuum receiver;

3 - lower flange;

4 - upper flange;

5 - a spacer;

6 - air channels in the spacer;

7 - air-conducting substrate;

8 - overlay with a pattern;

9 - additional forming elements;

10 - air gap between the outer ends of the flanges.

The essence of the utility model is illustrated by examples of designs of molds for vacuum molding of products from thermoplastic materials intended for installation on a car - mats (Fig. 1-4) and a mudguard (Fig. 5).

Each of those shown in FIG. 1, 3, 5 forms includes a forming element 1 with air channels and a vacuum receiver 2.

To implement the proposed utility model, the following changes in the design of the form are performed (see Fig. 1-5).

The mold is provided with lower 3 and upper 4 flanges, the outer contour of which in plan, at least partially, is similar to the contour of the forming element 1, as well as a spacer 5 located between the flanges 3, 4, with a central hole and with through lateral air channels 6.

Flanges 3, 4 can be made, for example, from a metal sheet.

The spacer 5 can be made, for example, of corrugated sheet material.

Between the outer ends of the flanges 3, 4 in a preferred embodiment, an air gap 10 is made to prevent damage to the spacer 5 when a cutting tool is inserted between the flanges 3,4 to trim the edges of the product.

The distance between the flanges 3, 4 is selected from the conditions for providing access to the cutting tool. In practice, this distance is selected from a range of 1.5-2 thicknesses of the molded material.

The lower and upper flanges 3, 4, as well as the spacer 5 can be attached to the forming element 1, for example, threaded elements (Fig. Not shown). The forming element 1, in turn, is installed on the receiver 2.

The mold may be provided with an overlay 8 with a pattern connected to the forming element 1 through an air-conducting substrate 7.

For the manufacture of products with complex geometry, the receiver 2 forms can be equipped with additional forming elements 9 (see Fig 3, 4).

The mold can be used, for example, as part of a vacuum molding machine.

The molding of products on a vacuum molding machine is as follows.

A sheet blank is laid on the frame frame of the vacuum forming machine and pressed with a clamping device. The heater is brought closer to the sheet blank and the sheet blank is heated until it reaches a plastic state. Then the heater is taken to the side and turn on the supply of atmospheric air with a vacuum pump. Air through the air channels of the desktop, the vacuum receiver, the air channels of the forming element 1 and the side air channels 6 of the spacer 5 enters the cavity between the work table and the sheet stock, which begins to inflate due to the increase in air pressure. A desktop with a form is introduced into the dome of the sheet blank. After this, the air supply is stopped, the vacuum pump is turned on for pumping air. Atmospheric pressure presses the dome of the sheet blank to the surface of the mold. The vacuum pump is turned off. The product is cooled. Then, the edges of the product are trimmed.

Trimming is carried out directly on the form with a cutting tool (manual or electric). To do this, the working part of the cutting tool is introduced into the groove on the end side of the product, formed with the help of flanges 3, 4 and spacers 5 between them, and the excess edges of the product are cut off by running the tool along the bottom of the groove between the flanges 3, 4.

Then the finished part, with cut edges, is removed from the mold.

It should be noted that trimming the product edges with a manual cutting tool is advisable when using elastic thermoplastic materials or thermoplastic materials of small thickness.

A mold made in accordance with the claimed utility model can be used, in addition to the vacuum molding machine, also in other devices. For example, in an installation including an extruder for producing a sheet of thermoplastic material and a vacuum pump.

The applicant’s exploitation of the forms made in accordance with the claimed utility model confirmed the industrial applicability of the utility model and its conformity with the declared technical result.

Claims (2)

1. A mold for vacuum molding of thermoplastic materials, comprising a forming element with through air channels and a vacuum receiver, characterized in that the mold is further provided with lower and upper flanges with central holes, as well as a spacer located between the flanges, with a central hole and through lateral air channels, and the outer contour of the flanges in plan is at least partially similar to the contour of the forming element. 2. The mold according to claim 1, characterized in that an air gap is made between the outer ends of the flanges.

Images