CN204820199U - Plastic mold does not have ejecting automatic demoulding mechanism - Google Patents

Abstract

The plastic mold has no ejection automatic demoulding mechanism, including the mold upper template and the lower template, the cavity is installed under the upper template, and the core is installed on the lower template. The gap between the mold core and the mold cavity forms a mold cavity, and there are injection-molded plastic parts in the mold cavity. A fixed rod is set in the core-pulling block, and one end of the fixed rod extends out of the core-pulling block, and a pusher is installed. The pusher plate is connected to the ejector rod, and the ejector rod is fixed on the fixed plate. The two sides of the fixed plate are movably connected to two long pull rods, and the other ends of the two long pull rods are respectively movably connected to the upper template and the lower template, and the two long pull rods are The middle warp pins are respectively movably connected with a short connecting rod, and two short connecting rods are movably connected with the pushing plate. This solution has no ejection structure, no top mark on the product, compact mold, small volume, suitable for small injection molding machine production, low investment, low production and high efficiency.

Description

Automatic ejection mechanism for plastic molds without ejection

technical field

The utility model relates to an automatic demoulding mechanism without ejection of a plastic mold, which belongs to the field of plastic molds.

Background technique

Plastic molds are used to produce plastic products, such as printer hollow shafts, funnels, and connecting pipes. According to the characteristics of the appearance and structure of the products and their performance, the hollow shafts of printers, long funnels, and connecting pipes need to be core-pulled and removed. There is an external thread on the outer connection. According to the traditional method, the slider will be used to demould, the ejector pin will be ejected or the product will be placed vertically, and the ejector plate will be ejected. However, due to the characteristics of long product and high appearance requirements, the original method There will be thimble marks on the surface when the thimble is used to push out. If the product is placed vertically and the mold is opened, the mold will be very high, the molding and injection molding opportunities required are large, and the production cost investment is large.

Contents of the invention

The purpose of the utility model is to overcome the disadvantages of the prior art and provide a non-ejection automatic ejection mechanism for plastic molds with no ejection structure, smooth demoulding, simple mold processing, high production efficiency, and low cost and investment.

The technical scheme of the automatic demoulding mechanism without ejection of the plastic mold of the utility model is: comprising an upper template and a lower template of the mold, a cavity is installed under the upper template, and a core is installed on the lower template, which is characterized in that the core and the cavity A core-pulling block is arranged between the core-pulling block, the gap between the core-pulling block and the core and the cavity forms a mold cavity, and there are injection-molded plastic parts in the mold cavity, and a fixed rod is arranged in the core-pulling block, and one end of the fixed rod extends Out of the core-pulling block, a pusher plate is installed, the pusher plate is connected to the ejector rod, and the ejector rod is fixed on the fixed plate, and the two sides of the fixed plate are movably connected to two long pull rods, and the other ends of the two long pull rods are respectively movably connected On the upper formwork and the lower formwork, the middle parts of the two long tie rods are respectively movably connected to a short connecting rod via pivot pins, and the two short connecting rods are movably connected to the pushing plate.

The plastic mold of the utility model has no ejection automatic demoulding mechanism. The two long pull rods and the two short connecting rods actually constitute a set of telescopic hinges. When the mold is opened, the power of the injection molding machine drives the mold core to The lower platen is separated from the cavity of the mold. During the mold opening process, the lower template moves with the core, driving the long tie rod to move. The core pulling block is suspended between the mold core and the cavity under the action of the long tie rod. The parts are also separated from the cavity and core, and are tightly wrapped on the core block to complete the first demoulding. The mold continues to open the mold, and the long pull rod drives the fixed plate, so that the fixed plate drives the ejector rod fixed on it to move forward. The ejector rod is connected to the pusher plate, and drives the pusher plate to move forward until it touches the plastic part , and completely push out the plastic part from the core-pulling block, the plastic part automatically falls out of the mold, the demoulding is smooth, there is no top mark on the product surface, and the mold has no ejection mechanism. The structure is compact, suitable for small injection molding machine production, and the investment cost is low. high productivity.

The plastic mold of the utility model has no ejection automatic demoulding mechanism, and the other end of the fixing rod is fixed by a screw through a pressure plate and a core-pulling block, and the installation is firm. A connection block is installed at one end of the upper formwork and the lower formwork, and two long pull rods are movably connected to the connection block respectively, which is convenient for connection. A positioning block is installed in the core and the cavity, and a positioning groove is formed on the core-pulling block. The positioning block cooperates with the positioning groove, so that the core-pulling block is accurately positioned in the mold when the mold is closed, and the injection molding will not offset position. The fixed rod is provided with a waterway, which is beneficial to the cooling of the fixed rod. The waterway has a waterway connecting block, and the waterway connecting block is fixed by the upper pressing plate, the lower pressing plate and the pushing plate, and the fixing is convenient and firm. The core and the cavity are provided with threaded inserts, which can form external threads at the joints of plastic parts, and adopt the form of inserts, which is convenient for mold processing and component replacement.

Description of drawings

Fig. 1 is a structural schematic diagram of the automatic demoulding mechanism without ejection of the plastic mold of the present invention;

Fig. 2 is a three-dimensional schematic diagram of the automatic demoulding mechanism without ejection of the plastic mold of the present invention.

Detailed ways

The utility model relates to an automatic demoulding mechanism without ejection for plastic molds, as shown in Figure 1 and Figure 2, comprising an upper template 1 and a lower template 4, a cavity 2 is installed under the upper template, and a core 3 is installed on the lower template A core-pulling block 5 is arranged between the core 3 and the cavity 2, and the gap between the core-pulling block 5, the core 3 and the cavity 2 forms a mold cavity, and there is an injection-molded plastic part 7 in the cavity, The core-pulling block 5 is provided with a fixed rod 6, and one end of the fixed rod 6 extends out of the core-pulling block 5, and a pusher plate 23 is installed, and the pusher plate 23 is connected to the ejector rod 22, and the ejector rod 22 is fixed on a fixed On the plate 11, two long tie rods 10 are movably connected to both sides of the fixed plate 11, and the other ends of the two long tie rods 10 are respectively movably connected to the upper formwork 1 and the lower formwork 4, and the middle parts of the two long tie rods 10 are respectively movably connected via the pivot pin 9 A short connecting rod 8, two short connecting rods 8 are movably connected to the pushing plate 23. The two long tie rods 10 and the two short connecting rods 8 described in this plan actually constitute a set of telescopic hinges. When the mold is opened, the power of the injection molding machine drives the mold core 3 to run downward, and the mold cavity 2 Partial separation, during the mold opening process, the lower template 4 moves with the core 3, driving the long tie rod 10 to move, and the core pulling block 5 is suspended between the mold core 3 and the cavity 2 under the action of the long tie rod 10, and the plastic part 7 also breaks away from cavity 2 and core 3, and is tightly wrapped on the core-pulling block 5, and completes demoulding for the first time. The mold continues to open the mold, and the long pull rod 10 drives the fixed plate 11, so that the fixed plate 11 drives the ejector rod 22 fixed on it to move forward, and the ejector rod 22 is connected to the pusher plate 23, driving the pusher plate 23 to Move forward until it touches the plastic part 7, and push the plastic part 7 out of the core block 5, the plastic part automatically falls out of the mold, the demoulding is smooth, there is no top mark on the product surface, and the mold has no ejection mechanism, and the structure is compact. It is suitable for the production of small injection molding machines, with low investment cost and high production efficiency. The other end of the fixing rod 6 is fixed with the core-pulling block 5 through the pressure plate 13 by the screw 12, and the installation is firm. One end of the upper formwork 1 and the lower formwork 4 is equipped with a connecting block 14, and two long tie rods 10 are movably connected to the connecting block 14 respectively, which is convenient for connection. The positioning block 15 is installed in the core 3 and the cavity 2, and the positioning groove 16 is formed on the core pulling block 5. The positioning block 15 cooperates with the positioning groove 16, so that the core pulling block is accurately positioned in the mold when the mold is closed. , and the position will not be shifted during injection molding. The waterway 17 is set in the fixed rod 6, there is a waterway, which is beneficial to the cooling of the fixed rod, the waterway 17 has a waterway connection block 18, and the waterway connection block 18 is fixed by the upper pressing plate 19 and the lower pressing plate 20 with the pushing plate 23, which is convenient for fixing ,reliable. The core 3 and the cavity 2 are provided with threaded inserts 21, which can form external threads at the joints of plastic parts, and adopt the form of inserts, which is convenient for mold processing and parts replacement.

Claims (6)

1. The plastic mold has no ejection automatic demoulding mechanism, including the mold upper template (1) and the lower template (4), the cavity (2) is installed under the upper template, and the core (3) is installed on the lower template. It is characterized in that the A core-pulling block (5) is arranged between the core (3) and the cavity (2), and the gap between the core-pulling block (5) and the core (3) and the cavity (2) constitutes a mold cavity. There is an injection-molded plastic part (7) in the cavity, and a fixed rod (6) is set in the core-pulling block (5), and one end of the fixed rod (6) extends out of the core-pulling block (5), and a pusher plate (23), the pusher plate (23) is connected with the ejector rod (22), and the ejector rod (22) is fixed on the fixed plate (11), and the two sides of the fixed plate (11) are movably connected with two long pull rods (10 ), the other ends of the two long tie rods (10) are respectively movably connected to the upper formwork (1) and the lower formwork (4), and the middle parts of the two long tie rods (10) are respectively movably connected to a short connecting rod ( 8), two short connecting rods (8) are flexibly connected to the pushing plate (23). 2. The plastic mold automatic demoulding mechanism without ejection according to claim 1, characterized in that the other end of the fixed rod (6) is connected with the core pulling block (5) by the screw (12) through the pressure plate (13). fixed. 3. The plastic mold automatic demoulding mechanism without ejection according to claim 1, characterized in that one end of the upper template (1) and the lower template (4) is equipped with a connecting block (14), two long pull rods ( 10) Actively connect to the connection block (14) respectively. 4. The plastic mold automatic demoulding mechanism without ejection according to claim 1, characterized in that positioning blocks (15) and core pulling blocks (5) are installed in the core (3) and cavity (2) Positioning groove (16) is shaped on, and positioning block (15) cooperates with positioning groove (16). 5. The plastic mold automatic demoulding mechanism without ejection according to claim 1, characterized in that a waterway (17) is set in the fixed rod (6), and the waterway (17) has a waterway connecting block (18), and the waterway The connection block (18) is fixed by the upper pressing plate (19) and the lower pressing plate (20) and the pushing plate (23). 6. The plastic mold automatic demoulding mechanism without ejection according to claim 1, characterized in that threaded inserts (21) are set in the core (3) and the cavity (2).