CZ2014161A3 - Injection mold for test plate - Google Patents

Abstract

The injection mold for the test plate for the production of samples for monitoring rheological, temperature and pressure conditions in the mold cavity consists of two halves (A) and (B), the first of which (A) consists of a fixed part formed by a clamping plate (001) with a portion of the shaped cavity, the nozzle (122), the replaceable inlet insert (104) and the centering ring (124), and the other half (B) is movable and consists of a clamping plate (006), a spacer (008), a support plate (003), and a matrix plate (002) in which the actual shape cavity is formed by the matrix insert (101), the inlet insert (102) and the slide insert (103), wherein the insert (103) and the insert (103) are temperature and pressure sensors (030) supported by special washers (130) resp. washers (128, 129, 134), which have different thicknesses and serve to reinforce the insert (103) during injection.

Description

Injection mold for test plate

Technical field

BACKGROUND OF THE INVENTION The present invention relates to a new injection mold for producing test specimens to examine rheological, pressure and temperature conditions in a mold cavity.

BACKGROUND OF THE INVENTION At present, there is no similar solution for producing samples for testing the filling of a mold cavity of various thicknesses and different polymers while measuring both the temperature and the pressure inside the mold. In this regard, the present solution is completely new and unique and we cannot refer to patent literature with a similar solution.

SUMMARY OF THE INVENTION

The injection mold for the production of test specimens to examine the rheological, pressure and temperature conditions in the mold cavity, according to the present invention, consists of a fixed part which is formed by one fixed plate serving simultaneously as a clamping plate and a part of the inlet system together with the exchange insert. At the same time, the dividing plane forms part of the mold cavity of the injection mold. The moving part, on the other hand, is composed of a plurality of parts, as there is an ejector system, a matrix plate and an insert forming a custom shaped cavity, a tempering system applied directly to the matrix insert through the matrix plate to achieve maximum cooling effect. Furthermore, there is a system of sensors for sensing temperature and pressure at various points of the shaped cavity. Due to this construction, the injection mold according to the present invention makes it possible to produce test pieces in several thicknesses, namely 0.9mm, 2mm and 4mm. In order to be able to do this, the shaped insert is positioned so that the desired cavity size is created by presetting it in the axial direction with respect to the axis of the injection nozzle. For all three types of test specimen, a film inlet at the top of the test segment is designed over its entire length to ensure even filling of the cavity. Since the thickness of the insert changes by shifting the insert, the ejector pins and sensor pads must also be replaced to match the actual position of the insert. This is done by simply disassembling the movable part of the injection mold which is connected by screws. In order to avoid the so-called air closure of the injection mold (diesel effect), venting is produced in the lower part of the mattress insert. The centering of the fixed and movable mold halves is provided by pins and bushes. The advantage of this solution is the fact that it is possible to preset the size of the mold cavity (the thickness of the test plate) and the different values as required by simple disassembly of the movable part of the injection mold. List of drawings in the drawing

The invention is illustrated in more detail with reference to the accompanying drawings, in which: Figure 1 is an overall view of the injection mold; and Figure 1b is an illustration of a molded part of the test plate. FIG. 2 shows the main parts of the mold cavity - a matrix insert that forms the majority of the peripheral walls of the molding, a mold insert that forms the bottom and includes sensing sensors and an inlet insert to allow filling of the mold cavity while forming part of the molding wall . FIG. 3 shows an open injection mold and a view of the dividing plane, where the arrangement of all the molded parts and ejectors is shown. 4 shows the location of the sensors to the evaluation device. FIG. Fig. 5 is a sectional view of the mold with the mold cuts shown; Figs. EXAMPLES OF THE INVENTION

Plate thickness 4mm - Nozzle 122 without inlet groove - Nozzle insert 104 is rotated by inlet groove 301 from shape (ie channel down and left) - Inlet insert 102 with film inlet with inlet channel - ejector 016 length 1 10mm - Sensor washer 130 length 29 mm - Sliding insert 103 supported by washer 128 3.10 mm thick Plate thickness 2mm - Nozzle 122 without inlet groove - Nozzle insert 104 is rotated by the inlet groove 30! from shape (ie channel down and left) - Inlet insert 102 with film inlet with inlet channel - ejector 016 length 112mm - Sensor washer 130 length 31 mm - Sliding insert 103 supported by washer 129 1.1 mm thick - Sliding on the back a spacer 134 having a thickness of 2 mm is attached to the insert 103

Plate Thickness 0.9mm - Nozzle 122 without Inlet Groove - Nozzle Insert 104 is rotated by inlet groove 301 from the shape (ie, channel down and left) - Inlet insert 102 with film inlet with inlet channel - ejector 016 length 113.1 mm - Washer 32.1 mm length sensors 130 - Sliding insert 103 is not supported by any washer - A 3.1 mm thick spacer 134 is attached to the back of the sliding insert 103, and a 3.1 mm thick washer 128 can be added.

Claims (3)

PATENT CLAIMS 1. Injection mold for a test plate for manufacturing samples for monitoring the rheological, temperature and pressure conditions in a mold cavity, characterized in that it consists of two halves (A) and (B), the first of them (A) consists of a fixed part formed by a clamping plate (001) with a part of the shaped cavity, a nozzle (122), a replaceable inlet insert (104) and a centering ring (124) and the other half (B) being movable and consisting of from a clamping plate (006), a spacer (008), a support plate (003), and a matrix plate (002) in which the actual shape cavity is formed by the matrix insert (101), the inlet insert (102) and the slide insert (103 ), wherein the temperature and pressure sensors (030) supported by special washers (130) and in the matrix plate (2) are disposed in the slide insert (103) and at the same time. washers (128,129,134), which have different thicknesses and serve to strengthen the sliding insert (103) during injection. 2. An injection mold for a specimen test plate for monitoring the theological, temperature and pressure conditions in the mold cavity of claim 1, wherein the ejection system for ejecting the molding is comprised of two plates (004) and (005) of guide bushes, own interchangeable ejectors and return pins (015), (016) and (017), wherein cooling of the shape cavity is provided by a tempering system consisting of own channels, mouthpieces and plugs (022), (023) and (024). 3. An injection mold for a test plate according to claim 1, wherein the size of the shaped cavity and the mold cavity are shown in FIG. test plate thickness is preset to 0.9mm or 2.00mm or 4.00mm as needed.