Mechanism for closing the mold of the plant for the production of pet containers

Abstract

The essence of the invention is the mechanism for closing the mold of the plant for the production of pet containers in the form of at least one section, which contains a frame (1) made in the form of a closed rigid structure, in the hollow volume of which the semi-forms of the mold are located on levers (4) with the possibility of their oscillatory motion on the axis the corresponding hinge (6) for forced closing or opening, the free ends of the semi-forms are kinematically connected to the drive (5) attached to the frame (1), and at least four stops (7) are installed on the outer surfaces of the semi-forms, additionally installed at least two movable stops (8), at least two limiters (11) and at least eight shock absorbers (10, 9); at least two movable stops (8) are located on the inner surfaces of the frame (1) with the possibility of contact with the stops (7); at least four shock absorbers (10, 9) are located on the frame (1) with the possibility of contacting the levers (4) and at least four shock absorbers (10, 9) are located on the lower part of the semi-forms with the possibility of contacting the limiters (11): the drives are pneumatic cylinders.

Description

[0001] Mechanism for closing the mold of the plant for the production of pet containers

[0002] The utility model belongs to devices for processing polymer materials in a plastic state, more precisely - to devices for forming products by blowing, namely - to the design of the mechanism for closing the semi-forms of the press mold of the installation for the manufacture of hollow products from blanks from polymer materials in a plastic state. Products that can be manufactured using the proposed vessel mechanism include liquid bottles, canisters, etc.

[0003] A known mechanism for closing the semi-forms of the press mold of the installation for the production of hollow products from blanks from polymeric materials in a plastic state, which contains a frame made in the form of a closed rigid structure, in the hollow volume of which are located the semi-forms of the press mold with cells corresponding to the shape of the hollow of products, the ends of the mold semi-forms of the same name are hingedly attached to the frame with the possibility of their oscillating movement on the axis of the corresponding hinge to forcibly close or open the semi-forms with levers, the free ends of the semi-forms are kinematically connected to the drive attached to the frame, and stops are installed on the outer surfaces of the semi-forms, intended for contact with the corresponding internal surfaces of the frame during closing of the semi-forms and blowing of the product and the formation of distributed forces in the frame to counteract the force of blowing the product (UA patent for a utility model No. 22146, IPC B29C 49 / 28 (2006.01), B29C 49 / 56 (2006.01); published on 10.04.2007, Bulletin No. 4).

[0004] The disadvantages of the known mechanism are insufficient productivity and low efficiency of operation due to difficult conditions for performing repair and preventive works.

[0005] Closest to the mechanism for closing the mold of the plant for the production of pet containers, which is claimed, is the closing mechanism of the semi-forms of the press form of the plant for the production of hollow products from blanks from polymer materials in a plastic state, containing a frame made in the form of a closed rigid structure, in the hollow volume of which there are semi-forms of the mold with nests corresponding to the shape of hollow products, the ends of the semi-forms of the same name are hingedly attached to the frame with the possibility of their oscillating movement on the axis of the corresponding hinge to forcibly close or open the semi-forms with levers, the free ends of the semi-forms are kinematically connected to the drive attached to the frame, and stops are installed on the outer surfaces of the semi-forms, intended for contact with the corresponding inner surfaces of the frame during the closing of the semi-forms and blowing the product and the formation of distributed forces in the frame to counteract the force of blowing the product, the closing mechanism of the semi-forms the mold is made in the form of at least two identical sections, each of which includes a frame, in the hollow volume of which a part of the mold with nests is placed, the frames are rigidly connected to each other and kinematically connected to the driver, the points of application of forces to the frames are located symmetrically with respect to the center of gravity of the press mold, and the gap between the adjacent ends of the frames is intended for access to the semi-forms and moving elements for repair and preventive work (UA patent No. 82432, IPC B29C 49 / 30, B29C 49 / 56, publ. 25.07.2013, Bui. No. 14).

[0006] The disadvantages of this mechanism for closing the semi-forms of the press mold of the installation for the manufacture of hollow products from blanks from polymeric materials in a plastic state are low reliability and low efficiency of its operation.

[0007] The basis of the utility model is the task of creating such mechanism for closing the mold of the plant for the production of pet containers for the manufacture of hollow products from blanks from polymer materials in a plastic state, in which the reliability and efficiency of its operation increases due to structural changes.

[0008] The set task is achieved by the fact that the mechanism for closing the mold of the plant for the production of pet containers in the form of at least one section, which contains a frame made in the form of a closed rigid structure, in the hollow volume of which the semi-forms of the mold are located on levers with the possibility of their oscillatory motion on the axis the corresponding hinge for forced closing or opening, the free ends of the semi-forms are kinematically connected to the drive attached to the frame, and at least four stops are installed on the outer surfaces of the semi-forms, additionally installed at least two movable stops, at least two limiters and at least eight shock absorbers; at least two movable stops are located on the inner surfaces of the frame with the possibility of contact with the stops; at least four shock absorbers are located on the frame with the possibility of contacting the levers and at least four shock absorbers are located on the lower part of the semi-forms with the possibility of contacting the limiters:

[0009] - the drives are pneumatic cylinders.

[0010] The drawings schematically show the mechanism for closing the mold of the plant for the production of pet containers, where in fig. 1 shows a general view of the closing mechanism for closing the mold of the plant for the production of pet containers (in the open state), in fig. 2 shows a general view of the mechanism for closing the mold of the plant for the production of pet containers (in the closed state).

[0011] The mechanism for closing the press mold of the installation for the production of PET containers (example) in the form of at least one section, which contains a frame 1, made in the form of a closed rigid structure, in the hollow volume of which there are semi-forms 3 of the press mold 2 on levers 4 with the possibility their oscillating movement on the axis of the corresponding hinge 6 to forced closing or opening. The free ends of the semi-forms 3 are kinematically connected to the drive 5 attached to the frame 1 , and four stops 7 are installed on the outer surfaces of the semi-forms 3. At least two movable stops 8 are located on the inner surfaces of the frame 1 with the possibility of contact with the stops 7. At least four shock absorbers 9 are located on the frame 1 with the possibility of contact with the levers 4 and at least four shock absorbers 10 are located on the lower part of the semi-forms 3 with the possibility of contact with the limiters 11.

[0012] The mechanism for closing the mold of the plant for the production of pet containers (example) is used as follows. The mechanism for closing the mold of the plant for the production of pet containers (example) in the form of at least one section, which contains a frame 1 , made in the form of a closed rigid structure, in the hollow volume of which there are semi-forms 3 of the press mold 2 on levers 4 with the possibility of their oscillating movement on the axis of the corresponding hinge 6 before the start of work of the semi-form 3 are diluted. A blank PET container 12 is placed between the semi-forms 3. After that, under the action of the drive 5, the semiforms 3 close and hold the blank 12 for the further process of blowing a bottle from it. When closing the semi-forms 3, the stops 7 installed on the outer surfaces of the semi-forms 3 are in contact with the corresponding movable stops 8 on the inner surfaces of the frame 1, and at least four shock absorbers 10 located on the lower part of the semi-forms 3 are in contact with the limiters 11. And during opening, at least four shock absorbers 9 are located on frame 1 is in contact with levers 4. Shock absorbers ensure reliable operation without shock loads on semi-forms 3 and without knocking on the drive 5. And this, accordingly, allows to ensure operation without destruction and significantly increases the service life.

[0013] Nowadays, PET containers are widely used in many industries. Therefore, the development and improvement of PET container manufacturing mechanisms is an urgent task for scientists and industry specialists.

[0014] One of these mechanisms is the mechanism for closing the mold of the plant for the production of pet containers. Disadvantages of the existing structures of the closing mechanisms of the mold of the plant for the production of PET containers are the shock loads that occur during closing / opening of the semi-forms, which lead to rapid destruction and, as a result, low reliability and productivity during operation and a limited period of operation of the mechanism.

[0015] The developed mechanism for closing the mold of the plant for the production of pet containers, thanks to the introduced changes, eliminates the indicated shortcomings. Namely, the additional introduction of at least two movable stops, at least two limiters and at least eight shock absorbers. At least two movable stops are located on the inner surfaces of the frame with the possibility of contact with the stops. At least four shock absorbers are located on the frame in contact with the levers and at least four shock absorbers are located on the lower part of the semi-forms in contact with the stops. Introduced shock absorbers eliminate shock loads and increase the performance of the mechanism and its duration.

[0016] The proposed mechanism for closing the mold of the plant for the production of pet containers has working samples that have shown high performance indicators.

Claims

Claims1. Mechanism for closing the mold of the plant for the production of pet containers in the form of at least one section, which contains a frame made in the form of a closed rigid structure, in the hollow volume of which the semi-forms of the mold are located on levers with the possibility of their oscillatory motion on the axis the corresponding hinge for forced closing or opening, the free ends of the semiforms are kinematically connected to the drive attached to the frame, and at least four stops are installed on the outer surfaces of the semi-forms, which differs in that additionally installed at least two movable stops, at least two limiters and at least eight shock absorbers; at least two movable stops are located on the inner surfaces of the frame with the possibility of contact with the stops; at least four shock absorbers are located on the frame with the possibility of contacting the levers and at least four shock absorbers are located on the lower part of the semi-forms with the possibility of contacting the limiters.

2. The mechanism for closing the mold of the plant for the production of pet containers, according to the claim 1, which differs in that the drives are pneumatic cylinders.

Images