CN103640191A - Mechanism for separating plastic products from slide blocks on four sides - Google Patents

Abstract

The invention discloses a mechanism for separating a four-sided sliding block from a plastic product, which belongs to the field of thermoplastic forming molds. It is characterized in that when the mold is opened, the fixed mold base plate and the fixed mold plate are bounced off under the action of spring tension, and the inclined wedge fixed on the fixed mold base plate drives the fixed mold slider to move, so that the fixed mold slider separates and the plastic comes out. The undercut part on the outside of the product, at the same time, the fixed mold slider is separated from the limit of the movable mold inner slider, so that the inner slider of the movable mold can be core-pulled under the action of spring tension, and the inverted inner part of the plastic product can be released. Buckle part; when the mold is closed, the inclined wedge guides the movement of the fixed mold slider to make the surfaces of the fixed mold sliders on both sides contact, and at the same time the tapered boss of the fixed mold slider contacts the tapered groove on the top of the movable mold inner pumping slider, and the completion Molding. Through the movement of the sliding block of the fixed mold and the sliding block of the moving mold, the undercut of the product in four directions is realized, the structure of the mold is simplified, and the production efficiency is improved.

Description

A mechanism for four-sided sliders to separate from plastic products

technical field

The invention belongs to the field of thermoplastic molding molds, and relates to a plastic mold with a four-sided sliding block detached from a plastic product, and is mainly used in molds with undercuts on the inside and outside of plastic products.

Background technique

Plastic forming molds are tools that use their specific shapes to form products with certain shapes and sizes. Currently, molds with undercuts on the inside and outside of plastic products are realized by slider forming outside undercuts and inclined top forming inside undercuts. In the mold in which the slider and the slanted top realize the undercut, the movement process of the slider and the slanted top is carried out separately during the mold opening process, in which the slider is positioned by the pressure plate, the wedge block is limited, the slanted guide column is guided, and the slanted top It needs to be connected by a pin to the fixed block with a slideway, and the fixed block is connected to the needle plate by the hanging table, and is positioned by contacting the surrounding of the fixed block with the surface of the needle plate. The guide plate takes up a lot of space and has a long ejection stroke.

In the process of processing, there are many matching dimensions and strict tolerances, which make the processing difficult; The matching parts are easy to be strained due to long-term sliding. During mass production, the stroke of the inclined top is long, and the strength is weak and easy to break, thereby increasing the cost and reducing the production efficiency.

Contents of the invention

In view of the above problems, the technical problem to be solved by the present invention is to provide a plastic mold with a four-sided slider detached from the plastic product, which can effectively save the mold space, simplify the mold structure, and solve the problem of making molds for plastic products with undercuts on the inside and outside. and problems in production.

The technical solution of the present invention is: a mechanism for four-sided sliders to separate from plastic products. Iron 6, movable mold seat plate 7, the internal structure includes: fixed mold slider A8, fixed mold slider B9, inclined wedge 10, movable mold insert 11, movable mold insert 12, movable mold inner pumping slider A13, movable mold Draw out slide block B14, dome bar 15, flat ejector bar 16, pressing plate A17, pressing plate B18, inclined wedge limit 19, backing plate 20, spring A21, jackscrew 22, spring B23 in the mold.

The inclined wedge 10 is connected with the fixed mold seat plate 1 through the hanging table, and the inclined wedge 10 is in contact with the four sides of the inclined wedge installation square hole on the fixed mold seat plate 1 to be positioned. The position is limited by the pressure plate A17, and the inclined wedge 10 is connected with the fixed mold seat plate 1 Locked and fixed by bolts, the fixed mold slider A8 and the fixed mold slider B9 are in surface contact and positioned on the cone surface, the fixed mold slider A8 and the fixed mold slider B9 are in surface contact with the pressure plate B18 and connected by a hanging table, and the pressure plate B18 It is in contact with the 2 sides of the fixed template, locked and fixed by bolts, the inclined wedge 10 is in contact with the inclined surface of the fixed mold slider A8 and the fixed mold slider B9 and wedged tightly, and the inclined wedge limit 19 is limited by contacting the inclined surface of the inclined wedge 10. position; the top of the movable mold internal pumping slider A13 and the movable mold internal pumping slider B14 are provided with a tapered groove, the bottom of the fixed mold slider B9 is provided with a tapered boss, the movable mold internal pumping slider A13 and the movable mold internal pumping slide The tapered groove of the block B14 cooperates with the inclined surface of the tapered boss of the fixed mold slider B9 and wedges tightly to limit the position;

The movable mold insert 12, the movable mold inner drawing slider 13 and the movable mold inner drawing slider 14 are connected to the hanging table of the movable mold insert 11 and are in surface contact with the backing plate 20, and the backing plate 20 and the moving mold insert 11 are locked by bolts And fixed, the spring A21 is limited by the top wire 22 and is in surface contact with the movable mold inner drawing slider A13 and the movable mold inner drawing slider B14, and the movable mold insert 11 is in surface contact with and positioned around the cavity of the movable template 3, Tighten and secure with bolts.

When opening the mold: the inclined wedge 10 drives the fixed mold slider A8 and the fixed mold slider B9 to move, so that the fixed mold slider A8 and the fixed mold slider B9 are separated from the conical surface and the mating surface, and the undercut part on the outside of the plastic product is released; at the same time The tapered boss at the bottom of the fixed mold slider B9 is separated from the tapered grooves on the top of the movable mold inner slider A13 and the movable mold inner slider B14, and the movable mold inner slider A13 and the movable mold inner slider B14 are in the Sliding under the tension of spring A21, the undercut part on the inner side of the plastic product comes out.

When closing the mold: After the inclined wedge 10 contacts the surface of the fixed mold slider A8 and the fixed mold slider B9, it is wedged tight and reset, and the fixed mold slider A8 and the fixed mold slider B9 are in contact with the cone surface to position them, and the fixed mold slides The tapered bosses at the bottom of the block B9 are respectively inserted into the tapered grooves on the top of the sliding block A13 in the movable mold and the sliding block B14 in the movable mold to contact and limit. the

The beneficial effects of the present invention are: the molding and demoulding of plastic products with outer undercuts can be realized through the fixed mold slider and its movement mode, and the wedge tight limit control of the fixed mold slider to the movable mold inner drawing slider is realized Inward pumping, so as to realize the molding and demoulding of plastic products with inner undercuts, in which the wedge has the function of limiting and guiding, and the slider of the fixed mold has the function of forming and limiting, which realizes the smooth release of the product and simplifies Improved the structure of the mold and improved production efficiency. the

Description of drawings

Below in conjunction with accompanying drawing, with embodiment concrete description.

Figure 1 is a schematic diagram of the mold mechanism.

Figure 2 is the second schematic diagram of the mold mechanism.

Fig. 3 is the schematic diagram of mold opening of this mold.

Fig. 4 is a schematic diagram of the mold opening state of the four-sided slider.

Figure 5 is a schematic diagram of the wedging part of the fixed mold slider and the movable mold slider after the mold is opened.

In the figure: 1 fixed die plate; 2 fixed die plate; 3 movable die plate; 4 face needle plate; 5 bottom needle plate; 6 square iron; ;10 Inclined wedge; 11 Moving mold insert; 12 Moving mold insert; 13 Moving mold inner drawing slider A; 14 Moving mold inner drawing slider B; 15 Dome rod; 16 Flat ejector rod; 17 Press plate A; Pressing plate B; 19 wedge limit; 20 backing plate; 21 spring A; 22 top wire; 23 spring B.

Detailed ways

Specific embodiments of the present invention will be described in detail below in conjunction with technical solutions and accompanying drawings.

Assembly of the mold: the wedge 10 is embedded in the fixed mold base plate 1, the bolt is threaded with the fixed mold base plate 1 through the pressure plate A17, the fixed mold slider A8 and the fixed mold slider B9 are placed in the slider groove of the fixed mold plate 2, and the pressure plate B18 is installed on both sides of the fixed mold slider A8 and the fixed mold slider B9, and the two sides of the fixed mold slider B9 are in contact with them to limit the surface. The bolt is threaded with the fixed template 2 through the pressure plate 18, and the wedge 10 passes through the fixed mold slider A8 and the fixed mold slider. B9 is in contact with the wedge limit 19 surface, the movable mold insert 12, the movable mold inner drawing slider A13 and the movable mold inner drawing slider B14 are embedded in the movable mold insert 11, put into the backing plate 20, and the bolts pass through the backing plate 20 It is threadedly connected with the movable mold insert 11, and after the movable mold insert 12, the movable mold inner drawing slider A13 and the movable mold inner drawing slider B14 are fitted into the movable mold insert 11, the bolts pass through the installation backing plate 20 and the movable mold insert 11 threaded connection, spring A21 is installed in the fixed mold insert 11, and is in surface contact with the movable mold inner drawer slider A13 and the movable mold inner drawer slider B14, and is limited by the top screw 22, and the movable mold insert 11 is installed on the movable template 3 And fixed by bolt locking.

When opening the mold: under the mold opening action of the molding machine, the fixed template 2 and the movable template 3 are separated, the fixed mold base plate 1 and the fixed mold plate 2 are bounced off by the tension of the spring B23, and the wedge fixed on the fixed mold base plate 1 10 With the movement of the fixed mold seat plate 1, the fixed mold slider A8 and the fixed mold slider B9 are driven to move, so that the fixed mold slider A8 and the fixed mold slider B9 are separated from the conical surface and the mating surface, and the inverted mold on the outside of the plastic product is released. Buckle part (see Figure 4); The grooves are separated (see Figure 5), and at the same time, the sliding block A13 and the sliding block B14 slide under the tension of the spring A21, and the undercut part inside the plastic product is released and fixed on the needle plate 4 The domed rod 15 and the flat ejector rod 16 act simultaneously to eject the plastic product (see Fig. 3), and complete the mold opening process.

When clamping the mold: Under the mold clamping action of the molding machine, the wedge 10 moves with the fixed mold seat plate 1, and the wedge 10 contacts with the surface of the fixed mold slider A8 and the fixed mold slider B9 to make it wedge tight and reset. The tapered surface of the fixed mold slider A8 and the fixed mold slider B9 are in contact with each other to position them (see Figure 1), and the conical bosses at the bottom of the fixed mold slider B9 are respectively inserted into the movable mold inner pumping slider A13 and the movable mold inner pumping slider The tapered surface in the tapered groove on the top of B14 contacts its limit, and the mold clamping is completed. the

Claims (1)

1. A mechanism for separating four-sided sliders from plastic products. The mold frame of the mechanism includes: fixed mold base plate (1), fixed mold plate (2), movable mold plate (3), face needle plate (4), bottom needle plate (5), square iron (6), movable mold seat plate (7), the internal structure includes: fixed mold slider A (8), fixed mold slider B (9), wedge (10), movable mold insert (11), moving mold insert (12), moving mold inner pumping slider A (13), moving mold inner pumping slider B (14), dome rod (15), flat ejector rod (16), pressure plate A (17), pressure plate B (18), wedge limiter (19), backing plate (20), spring A (21), top wire (22), spring B (23); it is characterized in that the wedge (10 The hanging table is connected with the fixed mold seat plate (1), and the oblique wedge (10) is in contact with the four sides of the oblique wedge installation square hole on the fixed mold base plate (1) to position, and the position is limited by the pressure plate A (17), and the oblique wedge ( 10) Lock and fix the fixed mold seat plate (1) with bolts, the fixed mold slider A (8) and the fixed mold slider B (9) are in surface contact and tapered positioning, the fixed mold slider A (8) ) and the fixed mold slide block B (9) are in contact with the surface of the pressure plate B (18) through the hanging table, the pressure plate B (18) is in contact with the surface of the fixed plate (2), locked and fixed by bolts, the wedge (10) and The fixed mold slider A (8) and the fixed mold slider B (9) are in contact with the inclined surface and wedged tightly, and the inclined wedge limit (19) contacts the inclined surface of the inclined wedge (10) to limit the position; the movable mold draws the slider inside The top of A (13) and the sliding block B (14) of the movable mold is provided with a tapered groove, and the bottom of the sliding block B (9) of the fixed mold is provided with a tapered boss. The tapered groove of the inner mold slider B (14) is matched with the tapered boss slope of the fixed mold slider B (9) and wedged tightly to limit the position; The movable mold insert (12), the movable mold internal pumping slider (13) and the movable mold internal pumping slider (14) are connected with the movable mold insert (11) and are in surface contact with the backing plate (20), and the backing plate ( 20) Lock and fix with the moving mold insert (11) by bolts, the spring A (21) is limited by the top wire (22) and is connected with the moving mold inner drawing slider A (13) and the moving mold inner drawing slider B (14) Surface contact, the movable mold insert (11) is in surface contact and positioned around the cavity of the movable template (3), and is locked and fixed by bolts; When opening the mold: the inclined wedge (10) drives the movement of the fixed mold slider A (8) and the fixed mold slider B (9), so that the cone surfaces of the fixed mold slider A (8) and the fixed mold slider B (9) The mating surface is separated, and the undercut part on the outside of the plastic product is released; at the same time, the tapered boss at the bottom of the fixed mold slider B (9) is connected with the movable mold inner slider A (13) and the movable mold inner slider B (14) The tapered grooves on the top are separated, the sliding block A (13) and the sliding block B (14) slide under the tension of the spring A (21), and the undercut part of the inner side of the plastic product is released; When closing the mold: After the inclined wedge (10) contacts with the surface of the fixed mold slider A (8) and the fixed mold slider B (9), make it wedge tight and reset, and the fixed mold slider A (8) and the fixed mold slider The conical surfaces of B (9) are in contact with each other to position them, and the conical bosses at the bottom of the fixed mold slider B (9) are inserted into the top of the movable mold inner slider A (13) and the movable mold inner slider B (14) respectively. The middle surface of the tapered groove contacts and limits.

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