CN201201321Y - Plastic mold with return structure - Google Patents

Abstract

The plastic mold with the return structure comprises a fixed mold plate and a movable mold plate, wherein a fixed mold core is arranged on the fixed mold plate, a movable mold core is arranged on the movable mold plate, a product cavity is formed between the fixed mold core and the movable mold core, a movable plate is arranged on one side of the movable mold plate, a square ejector pin and an inclined ejector pin are fixed on the movable plate, the end parts of the square ejector pin and the inclined ejector pin penetrate through the movable mold core respectively and extend into the parting surface of the product cavity, and the plastic mold is characterized in that a return pin is further arranged on the movable plate, a supporting spring is arranged at the bottom of the return pin, and the return pin is higher than the square ejector pin and the inclined ejector pin when the fixed mold plate and. The advantages are that: a return needle is added, and a supporting spring is arranged at the bottom of the return needle, so that the return needle is firstly in abutting contact with the fixed die plate and drives the movable plate to move to one side, and therefore, the square ejector pin and the inclined ejector pin are prevented from colliding with the fixed die core, the die is safer to produce, the service life of the die is prolonged, and the production cost is reduced.

Description

A plastic mold with return structure

【Technical field】

The utility model relates to a plastic mold with a return structure.

【Background technique】

Existing plastic molds generally include a fixed template and a movable template. The fixed template is provided with a fixed mold core, and the movable template is provided with a movable mold core. The product cavity is formed between the fixed mold core and the movable mold core. One side is also equipped with square thimbles and slanted thimbles that form the fractal surface of the cavity. When the mold is closed, the square thimbles and slanted thimbles are easy to touch the wall of the fixed mold core, and long-term collisions are likely to cause damage to the fixed mold core wall, resulting in Bad products and high scrap rate. The mold needs to be repaired, thus causing production to stop and causing losses to the company.

【Content of utility model】

Therefore, the purpose of this utility model is to solve the deficiencies of the prior art, to provide a plastic mold with a return structure that the inclined top and square thimble are not easy to collide with the fixed mold core, and the service life of the mold is increased.

In order to achieve the above object, the utility model adopts the following technical solutions:

A plastic mold with a return structure, comprising a fixed template and a movable template, the fixed template is provided with a fixed mold core, the movable template is provided with a movable mold core, and the gap between the fixed mold core and the movable mold core is A product cavity is formed. A movable plate is provided on one side of the movable template, and a square thimble and a slanted thimble are fixed on the movable plate. The ends of the square thimble and the slanted thimble respectively pass through the movable mold core and extend into the product cavity. At the parting surface, it is characterized in that there is also a return needle on the movable plate, and a support spring is provided at the bottom of the return needle, so that when the fixed template and the movable template are clamped, the return needle is higher than For square thimbles and slanted thimbles.

A plastic mold with a return structure as described above is characterized in that the return needle is ┴-shaped, the movable plate is provided with a hole passing through the return needle, and there is a step in the hole, so The head of the return needle can be stuck on the step.

A plastic mold with a return structure as described above is characterized in that a bottom plate is fixed on the lower side of the movable plate, the bottom plate covers the hole, and the support spring can support the return needle and limit it to the bottom plate and the head of the return needle.

A plastic mold with a return structure as described above is characterized in that the head of the return needle is provided with a groove, and one end of the support spring is arranged in the groove.

A plastic mold with a return structure as described above is characterized in that the side of the bottom plate is fixed with a push rod that cooperates with the ejector rod of the injection molding machine to move the bottom plate upward.

A plastic mold with a return structure as described above is characterized in that a spacer is fixed on the fixed plate at the colliding position of the return needle.

A plastic mold with a return structure as described above is characterized in that the return needle is covered with a spring to keep the movable template and the movable plate close to each other.

The utility model has the advantages of adding a return needle, and a support spring is provided at the bottom of the return needle, so that the return needle first collides with the fixed template, and drives the movable plate to move to one side, thus avoiding the Square thimbles and slanted thimbles collide with the core of the fixed mold, making mold production safer and increasing the service life of the mold, thus reducing production costs.

【Description of drawings】

Fig. 1 is the structural representation after the utility model clamping mold;

Fig. 2 is a partially enlarged schematic diagram of A place in Fig. 1;

Fig. 3 is the structural representation of the utility model after the mold opening;

Fig. 4 is the structure schematic diagram when the utility model closes the mould.

【Detailed ways】

Below in conjunction with accompanying drawing, the utility model is described in detail

As shown in the figure, a plastic mold with a return structure referred to in the utility model includes a fixed template 1 and a movable template 2, the fixed template 1 is provided with a fixed mold core 3, and the movable template 2 A movable mold core 4 is provided, and a product cavity 5 is formed between the fixed mold core 3 and the movable mold core 4. A movable plate 6 is provided on one side of the movable template 2, and a square thimble 7 and a square thimble are fixed on the movable plate 6. The slanted thimble 8, the ends of the square thimble 7 and the slanted thimble 8 respectively pass through the movable mold core 4 and extend to the parting surface 9 of the product cavity 5, wherein a return needle 10 is also provided on the movable plate 6 , the bottom of the return pin 10 is provided with a support spring 11, so that when the fixed template 1 and the movable template 2 are clamped, the return pin 10 is higher than the square thimble 7 and the inclined thimble 8, so that when the mold is clamped , the return pin 10 is first in contact with the fixed template 1 to prevent the square thimble 7 and the inclined thimble 8 from colliding with the fixed mold core 3 and causing damage.

The return needle 10 of the utility model is in a ┴ shape, the movable plate 6 is provided with a hole 12 passing through the return needle 10, a step 13 is provided in the hole 12, and the head of the return needle 10 100 can get stuck on step 13. The lower side of the movable plate 6 is fixed with a bottom plate 60, and the bottom plate 60 covers the hole 12, so that the support spring 11 can support the return needle 10 and is limited to the bottom plate 60 and the head 100 of the return needle 10. between.

The head 100 of the return needle 10 is provided with a groove 101 , and one end of the support spring 11 is disposed in the groove 101 , so that the support spring 11 can be retracted into the groove 101 after being pressed.

In this embodiment, the side of the bottom plate 60 is fixed with a push rod 602 that cooperates with the ejector pin 601 of the injection molding machine to move the bottom plate 60 upward. Position needle 10, square thimble 7 and inclined thimble 8 are pushed out outwards.

A spacer 14 is fixed on the fixed template 1 at the colliding position of the return needle 10 . The pads 14 are easy to replace after being damaged in long-term use, thereby avoiding the consequence that the fixed formwork 1 needs to be completely replaced after being damaged by collision, and reducing the maintenance cost.

In the utility model, a spring 15 is sheathed on the return needle 10 to keep the movable template 2 and the movable plate 6 close to each other.

When the utility model is in use, the return pin 10 is higher than the square thimble 7 and the inclined thimble 8 under the support of the support spring 11, so that the return pin 10 first collides with the fixed template 1. , and drive the movable plate 6 to move to one side, thereby avoiding the square thimble 7 and the inclined thimble 8 from colliding with the fixed mold core 3, making the mold production safer, increasing the service life of the mold, thereby reducing production costs.

Claims (7)

1. A plastic mold with a return structure, comprising a fixed template (1), a movable template (2), the fixed template (1) is provided with a fixed mold core (3), and the movable template (2) A movable mold core (4) is arranged on the top, and a product cavity (5) is formed between the fixed mold core (3) and the movable mold core (4), and a movable plate (6) is provided on one side of the movable template (2). ), a square thimble (7) and a slanted thimble (8) are fixed on the movable plate (6), and the ends of the square thimble (7) and slanted thimble (8) pass through the movable mold core (4) and stretch into the To the parting surface (9) of the product cavity (5), it is characterized in that a return needle (10) is also provided on the movable plate (6), and the bottom of the return needle (10) is provided with a supporting spring (11), when the fixed template (1) and the movable template (2) are clamped, the return pin (10) is higher than the square thimble (7) and the inclined thimble (8). 2. A plastic mold with a return structure according to claim 1, characterized in that the return needle (10) is in a ⊥ shape, and the movable plate (6) is provided with a ) hole (12), the hole (12) is provided with a step (13), and the head (100) of the return needle (10) can be stuck on the step (13). 3. A plastic mold with a return structure according to claim 2, characterized in that a bottom plate (60) is fixed on the lower side of the movable plate (6), and the bottom plate (60) covers the hole (12 ), the support spring (11) can support the return needle (10) and is defined between the bottom plate (60) and the head (100) of the return needle (10). 4. A plastic mold with a return structure according to claim 2 or 3, characterized in that the head (100) of the return needle (10) is provided with a groove (101), and the support spring One end of (11) is arranged in the groove (101). 5. A plastic mold with a return structure according to claim 3, characterized in that the side of the bottom plate (60) is fixed with a handle that cooperates with the ejector pin (601) of the injection molding machine to move the bottom plate (60) upwards. Top stick (602). 6. A plastic mold with a return structure according to claim 1, characterized in that a spacer (14) is fixed on the fixed plate (1) at the colliding position of the return needle (10). 7. A plastic mold with a return structure according to claim 1, characterized in that the return needle (10) is covered with a spring to keep the movable template (2) and movable plate (6) close (15).

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