CN2868641Y - A shrinkage inner core-pulling device for plastic molds - Google Patents

Abstract

A shrinkage inner core-pulling device for plastic moulds, characterized in that it is composed of a core 1, a main slider, an auxiliary slider, a core fixing plate, an inclined push rod, a push rod fixing plate, a push plate, a moving mold The seat plate and the inclined push rod are composed of the fixing parts of the core and the push rod fixing plate; The slope movement of different inclination angles of the slider makes the main and auxiliary sliders indent in sequence, thus, the mold is smoothly pushed out from the bottle-shaped mouth of the plastic part. The advantages of the utility model are: 1. Ingenious conception, which can successfully complete the demoulding process; 2. The shrinkage inner core-pulling structure is simple and smooth, which saves time and effort; 3. Improves work efficiency and facilitates the promotion of large-scale production and applications; 4. It has broad market prospects and commercial development significance.

Description

A shrinkage inner core-pulling device for plastic molds

(1) Technical field:

The utility model belongs to the field of plastic moulds, in particular to a shrinkage inner core-pulling device for plastic moulds.

(two) background technology:

Plastic injection molds are tools for producing plastic products and are widely used. In the injection molding of plastic products, due to the concave inside of some plastic products, as shown in Figure 1, the plastic parts cannot be taken out from the mold core after molding. The way to solve at present is to adopt movable core, after plastics molding, movable core is taken out from mold together with plastics, and then try to take out core. This method is time-consuming and laborious, and cannot meet the requirements of mass production.

(3) Contents of the invention:

The purpose of this utility model is to design a shrinkage inner core-pulling device for plastic molds and its use method, which can solve the above troubles, and is a practical and feasible tool and use method for plastic molds.

The technical scheme of the utility model: a shrinkage inner core-pulling device for plastic moulds, which is characterized in that it is composed of a core, a main slider, an auxiliary slider, a core fixing plate, an inclined push rod, and a push rod fixing plate , push plate, movable mold seat plate and the fixing parts of the oblique push rod to the core and the push rod fixing plate. There are six oblique push rods connected to the main slider and the auxiliary slider respectively. The back of the main slider is flat, and the angle between the two sides of the auxiliary slider is 60°. The back of the main slider is closely matched with the side of the auxiliary slider; The main and auxiliary sliders are guided by the guide chute. The inclination angle of the back of the main slider is α, the inclination angle of the back of the auxiliary slider is β, and the ratio of the inclination angle α:β of the main slider and the auxiliary slider is 1. : 2.

The above-mentioned main and auxiliary sliders that are guide-coordinated and the guide chute used are to utilize the dovetail groove on the core to cooperate with the dovetail on the main slider and the dovetail on the auxiliary slider to form a dovetail groove guide structure.

The above-mentioned oblique push rod is the upper pin and the lower pin to the fixing parts of the main and auxiliary slide blocks and the push rod fixed plate.

The working process of the utility model is as follows: (1) open the mold after the injection molding of the plastic product, so that the ejector rod of the plastic injection machine pushes the push plate, and the push plate is equipped with six oblique push rods connected with the main slider and the auxiliary slider at the same time Movement, so that the three main sliders and the three auxiliary sliders also move along the guide groove;

(2) The main slider moves along the inclined plane whose inclination angle is α, and the auxiliary slider moves along the inclined plane whose inclination angle is β, and 2α=β is established, so the inward contraction speed of the auxiliary slider is greater than that of the main slider, thus, The rapid internal contraction of the auxiliary slider provides space for the internal contraction of the main slider;

(3) After the main slider and the auxiliary slider shrink at the same time, the molded plastic parts are removed smoothly.

The working principle of the utility model is: because the shrinkage inner core-pulling structure adopts two groups of sliders, one group is a larger three-piece main slider; the other group is a smaller three-piece auxiliary slider, the main and auxiliary sliders The blocks are evenly spaced according to six equal parts of the circle, meanwhile, the sliders are guided by dovetail guide chute. When the mold is injection molded, the injection pressure acts on the top of the sliders, making the sliders close to each other to ensure the smoothness of the inner surface of the molding; after the injection is completed, the main and auxiliary sliders shrink inward under the action of the push-out mechanism, Utilizing the slope movement of the main and auxiliary sliders with different inclination angles, the main and auxiliary sliders are indented sequentially, so that the mold can be smoothly pushed out from the bottle-shaped mouth of the plastic part.

The advantages of the utility model are: 1. The concept is ingenious, and the demoulding process can be successfully completed; 2. The shrinkage inner core-pulling structure is simple, and the cooperation is smooth, saving time and labor; 3. The work efficiency is improved, and it is convenient for the promotion of large-scale production and applications; 4. It has broad market prospects and commercial development significance.

(4) Description of drawings:

Accompanying drawing 1 is the structure schematic diagram that the plastic product involved in the utility model has bottle diameter shape mouth. This structure indicates that the plastic part cannot be removed from the mold core after molding.

Accompanying drawing 2 is a cross-sectional structural schematic diagram of a shrinkage inner core-pulling device for plastic molds according to the present invention.

Accompanying drawing 3 is a schematic diagram of the longitudinal section structure of the main slider used in the shrinkage inner core-pulling device of the plastic mold according to the present invention.

Accompanying drawing 4 is a schematic diagram of the vertical section structure of the auxiliary slider used in the shrinkage inner core-pulling device of the plastic mold according to the present invention.

Accompanying drawing 5 is the structural diagram of the working state of the longitudinal section of a shrinkage inner core-pulling device for plastic molds of the present invention combined with a plastic part with a bottle-shaped mouth.

Among them: 1 is the core, 1a is the dovetail groove on the core, 2 is the main slider, 2a is the dovetail of the main slider, 3 is the auxiliary slider, 3a is the dovetail of the auxiliary slider, 4 is the core fixing plate, 5 6 is the lower pin, 7 is the push rod fixing plate, 8 is the push plate, 9 is the movable mold seat plate, 10 is the upper pin, 11 is the plastic part, 12 is the locking block, 13 is the side slider , 14 is an oblique guide post, 15 is a positioning ring, 16 is a sprue sleeve, 17 is a fixed mold seat plate, 18 is a small core, 19 is a fixed template, and 20 is a reverse push rod.

(5) Specific implementation methods:

Embodiment: a kind of retractable inner core-pulling device (see Fig. 1-5) that is used for plastic mould, it is characterized in that it is made of core 1, main slider 2, auxiliary slider 3, core fixing plate 4, inclined Push rod 5, push rod fixed plate 7, push plate 8, movable mold seat plate 9 and inclined push rod 5 are composed of fixing parts for core 1 and push rod fixed plate 7, the said main slider 2 and auxiliary slider The blocks 3 are evenly spaced according to six equal parts of the circle, and the push plate 8 has six oblique push rods 5 connected to the main slider 2 and the auxiliary slider 3 respectively. The back of the main slider is flat, and the two sides of the auxiliary slider are The included angle is 60°, the back of the main slider is closely matched with the side of the auxiliary slider; The angle is β, and the ratio of the inclination angle α:β of the main slider and the auxiliary slider is 1:2.

The guide chute adopted by the above-mentioned main and auxiliary sliders 2 and 3 in guiding fit is to use the dovetail groove 1a on the core 1 to cooperate with the dovetail 2a on the main slider 2 and the dovetail 3a on the auxiliary slider 3 Become a dovetail groove guide sliding structure.

Above-mentioned oblique push rod 5 is upper pin 10 and lower pin 6 to the fixture of main and auxiliary slide block 2 and 3 and push rod fixed plate 7.

Claims (3)

1. A shrinkage inner core-pulling device for plastic moulds, characterized in that it consists of a core, a main slider, an auxiliary slider, a core fixing plate, an inclined push rod, a push rod fixing plate, a push plate, a moving The mold base plate and the inclined push rod are composed of the fixing parts for the core and the push rod fixing plate. The said main slider and the auxiliary slider are evenly spaced according to six equal parts of the circle. The six oblique push rods connected with the block and the auxiliary slider, the back of the main slider is flat, the angle between the two sides of the auxiliary slider is 60°, the back of the main slider is closely matched with the side of the auxiliary slider; The slider adopts the guiding fit of the guide chute, the inclination angle of the back of the main slider is α, the inclination angle of the back of the auxiliary slider is β, and the ratio of the inclination angle α:β of the main slider and the auxiliary slider is 1:2. 2. A shrinkage inner core-pulling device for plastic molds according to claim 1, characterized in that the main and auxiliary sliders in guiding fit and the guide chute adopted use the dovetail on the core The slot cooperates with the dovetail on the main slider and the dovetail on the auxiliary slider to form a dovetail groove guiding structure. 3. A shrinkage inner core-pulling device for plastic moulds, according to claim 1, characterized in that said inclined push rods are fixed to the main and auxiliary sliders and the push rod fixing plate by upper pins and Lower the pin.

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