CN222004217U - Positioning mechanism for preventing injection molding from falling - Google Patents

Abstract

The utility model belongs to the technical field of two-color injection molding production, and provides a positioning mechanism to prevent injection molding parts from falling off, including a product, a fixed mold core, a movable mold core, a sliding block, a spring, and a fixed mold core wedge fastener. The product includes a first injection molded part and a second injection molded part. The fixed mold core wedge fastener is located between the fixed mold core and the movable mold core and acts on the sliding block. The spring acts on the sliding block and makes the sliding block have a rebound force. The advantage of the utility model is that the sliding block can participate in the sealing of glue during the first injection molding, and maintain a continuous pressing state, stably and effectively fix the product. When the movable mold rotates, it can continue to maintain a clamping state to prevent the first injection molded part from loosening or falling out of the cavity during the movement. During the second injection molding, the sliding block does not participate in the sealing of glue, ensuring that the characteristics and appearance quality of the first injection molded part are not affected and can be effectively sealed. It can effectively solve the problem of falling parts of two-color injection mold products, and avoid problems such as joint marks and clamping lines on the product appearance surface, and realize automated production.

Description

Positioning mechanism for preventing injection molding from falling

Technical Field

The utility model belongs to the technical field of double-shot injection molding production injection molding, and particularly relates to a positioning mechanism for preventing injection molding from falling.

Background

In double-colored injection mold, the product of first injection molding need stay the movable mould when the first mould opening, under the condition that first injection molding is not ejecting, the movable mould rotates 180 degrees, then carries out the secondary and moulds plastics, make first injection product fuse as an organic wholely with the second injection product, form the double-colored injection molding of completion, at the in-process that the movable mould rotated 180 degrees, because the adsorption affinity of product at the movable mould die cavity is not enough, one injection product can be general at rotatory in-process not hard up, deviate from the die cavity even, the product drops, unable normal production, and the product location is unstable, the product produces appearance defect easily, automated production difficulty.

Disclosure of utility model

The utility model aims to solve the technical problem of the prior art, and provides a positioning mechanism for preventing injection molding from falling parts, which ensures that a first injection molding part is stably fixed in a movable mold cavity and solves the problem of product falling parts.

The technical scheme adopted for solving the technical problems is as follows: the utility model provides a prevent to mould plastics and fall a positioning mechanism, its characterized in that, including product, cover half benevolence, movable mould benevolence, sliding block, spring and cover half benevolence wedging piece, the product contain first injection molding and second injection molding, cover half benevolence wedging piece be located between cover half benevolence and the movable mould benevolence and act on the sliding block, the spring acts on the sliding block and makes the sliding block have resilience force.

In the above positioning mechanism for preventing injection molding from falling, the sliding block is provided with a groove inclined plane, the die core wedging piece can slide into the groove inclined plane, the bottom of the sliding block is provided with a containing groove, the spring is positioned at the side part of the containing groove, one end of the spring is propped against the side part of the containing groove, and the other end of the spring stretches out of the containing groove to prop against the movable die core.

In the above positioning mechanism for preventing injection molding from falling, when the first injection molding is performed and the mold cavity is closed by the mold closing of the fixed mold core and the movable mold core, the wedging surface of the wedging piece of the fixed mold core compresses the sliding block, and the head of the sliding block stretches into the mold cavity to contact with the product and press the contact surface of the product.

In the positioning mechanism for preventing injection molding from falling, the size of the contact surface is more than or equal to 1mm.

In the above positioning mechanism for preventing injection molding from falling, in the second injection molding die closing state, the wedge block of the fixed die core is wedged into the groove inclined surface of the sliding block, and the head of the sliding block moves towards the outer direction of the die cavity to form a parting surface sealing area.

Compared with the prior art, the utility model has the advantages that the sliding block participates in sealing glue during the first injection molding, keeps a continuous compression state, stably and effectively fixes a product, can continuously keep a clamping state when the movable mold rotates, prevents the first injection molding part from loosening or separating from a cavity part in the moving process, does not participate in sealing glue during the second injection molding, ensures that the characteristics and appearance quality of the first injection molding part are not influenced and can effectively seal glue, can effectively solve the problem of dropping the product of the double-color injection molding mold, and avoids the problem of connecting mark, clamping line and the like of the appearance surface of the product, thereby realizing automatic production.

Drawings

FIG. 1 is a schematic view of a first injection mold clamping structure of the injection molding drop prevention positioning mechanism;

fig. 2 is a schematic structural view of a second injection mold closing mechanism of the injection molding drop prevention positioning mechanism.

Detailed Description

The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.

In the figure, product 100; a first injection molding 101; a second injection molded part 102; a fixed mold core 200; a movable mold core 300; a slider 400; groove bevel 401; a receiving groove 402; a spring 500; a fixed mold insert wedge 600; a wedge surface 601; a contact surface 700; and a parting surface sealing area 800.

As shown in fig. 1, the injection molding drop preventing positioning mechanism comprises a product 100, a fixed mold core 200, a movable mold core 300, a sliding block 400, a spring 500 and a fixed mold core wedging member 600, wherein the product 100 comprises a first injection molding member 101 and a second injection molding member 102, the fixed mold core wedging member 600 is positioned between the fixed mold core 200 and the movable mold core 300 and acts on the sliding block 400, the spring 500 acts on the sliding block 400 and enables the sliding block 400 to have a rebound force, the sliding block 400 is provided with a groove inclined surface 401, the mold core wedging member can slide into the groove inclined surface 401, a containing groove 402 is formed at the bottom of the sliding block 400, the spring 500 is positioned at the side part of the containing groove 402, one end of the spring 500 is propped against the containing groove 402, the other end of the spring 402 is propped against the movable mold core 300, when the fixed mold core 200 and the movable mold core 300 are clamped to close a mold cavity during the first injection molding, the head of the sliding block 400 extends into the mold cavity to contact with the product 100 and press the contact surface 700 of the product 100, that is, the product 100 and the sliding block 400 intersect at the contact surface 700, the size of the contact surface 700 is determined according to the product 100, the size of the contact surface 700 is generally equal to or larger than 1mm, so as to ensure that the product 100 can be pressed and prevented from loosening and falling, after the first injection molding is finished, the movable mold insert 300 moves and opens under the action of the driving force of the injection molding machine, the sliding block 400 keeps the position state during mold closing due to the reaction force of the spring 500, the first injection molding piece 101 is continuously pressed, the movable mold insert 300 rotates 180 degrees under the action of the driving force of the turntable of the injection molding machine, as shown in fig. 2, during the second injection molding, the fixed mold insert wedge 600 is fixed on the fixed mold insert 200 by screws, during the second injection molding, the inclined wedge of the fixed mold insert wedge 600 is inserted into the groove inclined surface 401 of the sliding block 400 when the reaction force is larger than the reaction force of the spring 500, the head of the sliding block 400 moves towards the outside direction of the cavity and forms a parting surface sealing area 800, at this time, the sliding block 400 is completely separated from the first injection molding piece 101, when the fixed mold core 200 and the movable mold core 300 are closed, a closed cavity for second injection molding is formed, the mold performs second injection molding to form a second injection molding piece 102, and after the second injection molding is completed, the mold opening, the piece taking and other actions are performed. Through this mechanism, can realize that the sliding block 400 participates in the seal when the first penetrated injection molding to keep continuously compressing tightly the state, stable effectual fixed product 100, the sliding block 400 does not participate in the seal when the second penetrated injection molding, ensures that the product characteristic and the outward appearance quality that the second penetrated do not receive the influence.

The embodiments described herein are merely illustrative of the principles of the present utility model, and those skilled in the art may make various modifications or additions to, or substitutions for, the described embodiments without departing from the scope of the utility model as defined in the accompanying claims.

Claims (5)

1. A positioning mechanism for preventing injection molded parts from falling off, characterized in that it includes a product, a fixed mold core, a movable mold core, a sliding block, a spring and a fixed mold core wedge fastener, the product includes a first injection molded part and a second injection molded part, the fixed mold core wedge fastener is located between the fixed mold core and the movable mold core and acts on the sliding block, the spring acts on the sliding block and gives the sliding block a rebound force. 2. According to claim 1, a positioning mechanism for preventing injection molding parts from falling off is characterized in that the sliding block has a groove slope, the mold core wedge can slide into the groove slope, and a receiving groove is opened at the bottom of the sliding block. The spring is located in the receiving groove and one end is against the side of the receiving groove, and the other end extends out of the receiving groove and presses on the movable mold core. 3. A positioning mechanism for preventing parts from falling out during injection molding according to claim 2, characterized in that, during the first injection molding, when the fixed mold core and the movable mold core are molded together to close the mold cavity, the wedging surface of the fixed mold core wedging piece presses the sliding block, and the head of the sliding block extends into the mold cavity to contact the product and press the contact surface of the product. 4. A positioning mechanism for preventing injection molding parts from falling off according to claim 3, characterized in that the size of the contact surface is ≥ 1 mm. 5. A positioning mechanism for preventing parts from falling out during injection molding according to claim 4, characterized in that, in the second injection molding mold closing state, the fixed mold core wedge block is obliquely wedged into the groove slope of the sliding block, and the head of the sliding block moves toward the outside of the cavity to form a parting surface sealing area.