CN216329702U

CN216329702U - Oil cylinder self-locking mold

Info

Publication number: CN216329702U
Application number: CN202122332034.9U
Authority: CN
Inventors: 赵金昌; 陈俊名
Original assignee: Ningbo Henghe Precision Industry Co ltd
Current assignee: Ningbo Henghe Precision Industry Co ltd
Priority date: 2021-09-26
Filing date: 2021-09-26
Publication date: 2022-04-19
Anticipated expiration: 2031-09-26

Abstract

The utility model relates to an oil cylinder self-locking die which comprises an upper die and a lower die, wherein an upper die core and a lower die core are respectively arranged in the upper die and the lower die; the upper die core is provided with an insert, the lower end of the insert obliquely extends into the upper die core and forms an injection molding cavity together with the upper die core and the lower die core; the insert is pushed to move on the upper die core through an oil cylinder; the insert is connected with a sliding block, and the oil cylinder provides power for the sliding block to push the insert to move; a self-locking assembly is arranged between the oil cylinder and the sliding block; the self-locking assembly is used for locking the sliding block and the upper die core; when the mold is opened, the self-locking assembly unlocks the sliding block in the first stroke, and pulls out the sliding block from the upper mold core in the second stroke, so that the insert is separated from the product. The utility model has the beneficial effects that: 1. set up and keep away empty unblock groove, carry out the unblock to the slider earlier when carrying out the drawing of patterns, the in-process movable pin that withdraws from at the slider directly returns to in the pinhole after receiving the thrust of draw-in groove, has avoided the movable pin to receive the extrusion to lead to wearing and tearing and influence the use.

Description

Oil cylinder self-locking mold

Technical Field

The utility model relates to the technical field of dies, in particular to an oil cylinder self-locking die.

Background

In injection mold, because the appearance of product is various, and some product appearance structures are special, must inevitably use the mold insert of different kinds and quantity to be used for auxiliary production. When injection molding is carried out, the mold insert is reset at the mold closing money and then is subjected to mold closing production. However, in most products with special structures, an insert in an inclined direction is generally needed, and the mold closing is performed after the insert is reset in a conventional mold closing manner, so that the insert collides with a mold core during mold closing due to inaccurate resetting of the insert, and the mold is possibly damaged. Therefore, the mold closing is performed before the mold insert resetting is performed. At the same time, the obliquely arranged insert needs to be locked. At present, most of the self-locking oil cylinders are adopted, and the insert is pushed to reset through the oil cylinders and then locked. And the auto-lock hydro-cylinder among the prior art cost is high, the reliability is not enough to adopt the mould inner wall to carry out the extruded mode unblock to the auto-lock structure, the pressure that produces the auto-lock structure at the unblock in-process is too big, leads to easy damage, the life of auto-lock structure to be short, be not convenient for production and use, the practicality is relatively poor.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems in the prior art, the utility model provides the oil cylinder self-locking mold which can unlock an insert in the inclined direction, does not damage a self-locking structure during unlocking, and is good in practicability.

An oil cylinder self-locking die comprises an upper die and a lower die, wherein an upper die core and a lower die core are respectively arranged in the upper die and the lower die; the upper die core is provided with an insert, the lower end of the insert obliquely extends into the upper die core and forms an injection molding cavity together with the upper die core and the lower die core; the insert is pushed to move on the upper die core through an oil cylinder; the insert is connected with a sliding block, and the oil cylinder provides power for the sliding block to push the insert to move; a self-locking assembly is arranged between the oil cylinder and the sliding block; the self-locking assembly is used for locking the sliding block and the upper die core; when the mold is opened, the self-locking assembly unlocks the sliding block in the first stroke, and pulls out the sliding block from the upper mold core in the second stroke, so that the insert is separated from the product.

Through adopting above-mentioned technical scheme, set up the auto-lock structure, the hydro-cylinder pushes the slider into go up the mould benevolence in and carries out the locking, avoids moulding plastics the in-process because the unstability of slider leads to inserting the removal, the production substandard product of moulding plastics.

The technical scheme is further set as follows: the self-locking die comprises a push block and a movable pin which are arranged in a sliding block, wherein a pushing groove capable of containing the push block is formed in the sliding block, a clearance unlocking groove is formed in the pushing groove, and the distance of the push block moving in the clearance unlocking groove is a first stroke.

The technical scheme is further set as follows: the groove width of the clearance unlocking groove is larger than that of the pushing groove, and the pushing block is provided with a limiting convex part which slides in the clearance unlocking groove; the thickness of the limiting convex part is smaller than the groove distance of the clearance unlocking groove.

Through adopting above-mentioned technical scheme, set up and keep away the sky unlocking groove, carry out the unblock to the slider earlier when carrying out the drawing of patterns, in-process movable pin that the slider withdrawed from receives directly to return to in the pinhole behind the thrust of draw-in groove, has avoided the movable pin to receive the extrusion to lead to wearing and tearing and influence the use.

The technical scheme is further set as follows: the push block is connected to the oil cylinder, and the push block moves in the sliding block by the power provided by the oil cylinder; a pin hole capable of accommodating the movable pin is formed in the sliding block; the movable pin can extend out of the sliding block under the ejection action of the pushing block and is clamped with the upper mold core.

The technical scheme is further set as follows: the pushing groove is communicated with the pin hole and is vertically arranged; the pushing part at the front end of the pushing block is contacted with the movable pin and pushes the movable pin outwards in the pushing process.

The technical scheme is further set as follows: the tip of the pushing part is arranged in a conical shape.

By adopting the technical scheme, the pushing part is arranged to be conical and is in contact with the movable pin through the inclined surface, the force in the inclined direction is applied to the movable pin, and the horizontal component force of the component force pushes the movable pin outwards.

The technical scheme is further set as follows: the upper die is provided with an embedded groove matched with the sliding block, and two side walls of the embedded groove are provided with clamping grooves matched with the movable pin.

The technical scheme is further set as follows: the upper die core is embedded with a guide block, a guide groove matched with the insert is formed in the guide block, and the insert slides in the guide groove along the inclined direction under the pushing of the sliding block.

The technical scheme is further set as follows: the upper end of the insert is a T-shaped sliding end, a contact surface, connected with the sliding end, of the sliding block is an inclined surface, a sliding groove is formed in the contact surface, and the insert and the sliding block are connected in an inclined mode.

The technical scheme is further set as follows: first inclined planes are arranged on two sides of the outer end portion of the movable pin, and second inclined planes corresponding to the first inclined planes are arranged on the groove walls of the clamping grooves.

By adopting the technical scheme, the clamping groove is clamped with the movable pin, the contact surface of the clamping groove and the movable pin is arranged to be an inclined surface, when the sliding block exits, the second inclined surface on the clamping groove exerts force in the inclined direction on the first inclined surface at the outer end of the movable pin, and the movable pin is pushed into the pin hole by the component force in the horizontal direction.

The utility model has the beneficial effects that:

1. the anti-empty unlocking groove is arranged, the sliding block is unlocked firstly when demoulding is carried out, and the movable pin directly returns into the pin hole after being pushed by the clamping groove in the sliding block withdrawing process, so that the movable pin is prevented from being abraded due to extrusion to influence use;

2. the self-locking assembly is arranged to accurately position and lock the obliquely arranged insert, so that the damage to a mold core caused by inaccurate sliding position of the insert is avoided;

3. the structure of movable pin and ejector pad is adopted, the function of mechanical self-locking is realized by matching with the oil cylinder, the production cost is low, the structure is simple, the operation is convenient, and the practicability is strong.

Drawings

Fig. 1 is a schematic diagram of an explosive structure of the present invention.

Fig. 2 is a schematic cross-sectional structure of the present invention.

Fig. 3 is a schematic structural diagram of a slider.

Fig. 4 is a schematic sectional structure view of the present invention in a clamped state.

Fig. 5 is an enlarged schematic view of a portion a in fig. 4.

FIG. 6 is a schematic cross-sectional view of the ejector pad in a state of exiting from the pin hole.

Fig. 7 is an enlarged structural view of a portion B in fig. 6.

The attached drawings are marked with: 1. an upper die; 2. a lower die; 3. an upper die core; 4. a lower die core; 5. an insert; 6. an oil cylinder; 7. a slider; 8. a movable pin; 9. a push block; 701. a pin hole; 702. a propulsion tank; 902. a pushing part; 7021. a clearance-avoiding unlocking groove; 901. a limiting convex part; 101. caulking grooves; 10. a guide block; 1001. a guide groove; 703. a chute; 704. a sliding rib; 11. A compression block; 12. a guide sleeve; 13. and (6) a guide pillar.

Detailed Description

To further illustrate the technical means and effects of the present invention for achieving the intended purpose of the utility model, the following detailed description of the embodiments, structures, features and effects according to the present invention will be made with reference to the accompanying drawings and preferred embodiments.

As shown in fig. 1-7, the utility model provides a self-locking die for an oil cylinder 6.

Referring to fig. 1 and 2 specifically, the injection molding machine comprises an upper die 1 and a lower die 2, wherein the upper die 1 and the lower die 2 are positioned by matching a guide pillar 13 and a guide sleeve 12, an upper die core 3 and a lower die core 4 are respectively embedded in the upper die 1 and the lower die 2, an inclined insert 5 is arranged on the upper die core 3, and the lower end of the insert 5 extends into the upper die core 3 to be combined with the upper die core 3 and the lower die core 4 to form a complete injection molding cavity. The upper die core 3 is provided with a guide block 10, the guide block 10 is provided with a guide groove 1001 matched with the insert 5, the tail end of the insert 5 is connected to the slide block 7, and the oil cylinder 6 provides power for the slide block 7 to push the insert 5 to move in the guide groove 1001. Be equipped with the auto-lock subassembly between hydro-cylinder 6 and the slider 7, can carry out the locking with slider 7 and last mould benevolence 3. The upper die core 3 is provided with an embedded groove 101 capable of accommodating the sliding block 7, sliding ribs 704 are arranged on two sides of the sliding block 7, and the sliding ribs 704 are limited in the embedded groove 101 by the pressing block 11.

The upper end of the insert 5 is a T-shaped sliding end, the contact surface of the slide block 7 connected with the sliding end is an inclined surface, a sliding groove 703 is arranged along the contact surface, and the insert 5 slides in the sliding groove 703.

When the die is closed, the oil cylinder 6 pushes the sliding block 7 into the caulking groove 101, meanwhile, the insert 5 is also obliquely pushed into the upper die 1 core by the sliding block 7 along the guide groove 1001, and the self-locking assembly locks the sliding block 7.

When the mold is opened, the oil cylinder 6 is pulled outwards, the self-locking assembly is unlocked in a first stroke, the sliding block 7 can slide relative to the upper mold core 3, and the sliding block 7 is pulled out in a second stroke.

The self-locking assembly comprises a push block 9 and a movable pin 8 which are arranged in the sliding block 7 in a sliding mode. The push block 9 is connected with the oil cylinder 6 and driven by the oil cylinder 6 to move in the slide block 7 to push the movable pin 8 to move.

In this embodiment, there are two movable pins 8, and the movable pins are symmetrically arranged. When the push block 9 moves forward, the top pushing part 902 can extend into the pin hole 701 to contact with the ends of the two movable pins 8 and push the movable pins 8 to move outward.

As shown in fig. 3, the slider 7 is provided with a pin hole 701 and a push groove 702, and the push block 9 is disposed in the push groove 702. A part of the pushing groove 702 is provided as an empty-avoiding unlocking groove 7021, and the width of the empty-avoiding unlocking groove 7021 is larger than that of the pushing groove 702. The pushing block 9 is provided with a limiting convex part 901 which can limit the movement in the clearance unlocking groove 7021, and the thickness of the limiting convex part 901 is smaller than the groove distance of the clearance unlocking groove 7021. A gap exists between the end face of the limiting convex part 901 and the clearance unlocking groove 7021, which is a moving path of the limiting convex part 901 in the clearance unlocking groove 7021 and is a first stroke in the mold opening state.

As shown in fig. 4 and 5, the movable pin 8 is disposed in the pin hole 701 and is movable in the pin hole 701 to protrude outside the pin hole 701. The pin hole 701 and the push groove 702 are vertically arranged and communicate with each other. The top end of the pushing groove 702 communicates with the middle position of the pin hole 701. The pushing part 902 on the pushing block 9 extends into the pin hole 701, contacts with the two movable pins 8, and pushes the movable pins 8 outwards, so that the movable pins 8 extend out of the sliding block 7 to be connected with the upper mold core 3.

In this embodiment, the surface of the distal end of the movable pin 8 that contacts the pushing portion 902 is provided as an inclined surface. The pushing portion 902 applies a pushing force in an oblique direction to the movable pin 8.

As shown in fig. 6 and 7, when the mold is opened, the oil cylinder 6 drives the push block 9 to move outward, the push portion 902 of the push block 9 is separated from the pin hole 701, and no ejection force is applied to the movable pin 8.

In this embodiment, the tip of the pushing portion 902 is tapered. When contacting the movable pin 8, the movable pin 8 is ejected out through the inclined surface.

The side wall of the caulking groove 101 of the upper die 1 is provided with a clamping groove matched with the movable pin 8. The outer side end face of the movable pin 8 is in a conical arrangement, two inclined faces in contact with the clamping groove are first inclined faces, and the front side wall and the rear side wall of the clamping groove are second inclined faces matched with the first inclined faces.

The use mode of the utility model is as follows: when the die is closed, the upper die and the lower die are closed, the oil cylinder is started, the oil cylinder pushes the push block, the push part at the front end of the push block pushes the two movable pins, the movable pins cannot move outwards at the moment, and the slide block is pushed to push the insert downwards. When the sliding block is about to slide to the designated position, the pin hole is close to the clamping groove in the upper die, the movable pin is gradually pushed out to two sides by the pushing part until the limiting convex part on the pushing block abuts against the foremost end of the avoidance unlocking groove, the movable pin is completely clamped into the clamping groove, the sliding block cannot move, and the insert block arrives at the designated position.

When the mold is opened, the oil cylinder is started, the oil cylinder pulls the push block outwards, the pushing part on the push block retreats from the pin hole, when the limiting convex part on the push block retreats to the rearmost end of the avoidance unlocking groove, the oil cylinder continues to drive the push block to move outwards, and the push block drives the slide block to retreat outwards. The slider is at the exit in-process, and the removable pin also outwards removes, and the second inclined plane in the draw-in groove exerts the thrust of incline direction to the first inclined plane of removable pin, and its separation promotes the removable pin to the pinhole in, and in the pinhole was gone back into to the removable pin is complete, the slider also withdrawed from, and the mold insert breaks away from with injection moulding's product, can go on the die sinking operation of mould and lower mould.

Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. An oil cylinder self-locking die comprises an upper die (1) and a lower die (2), wherein an upper die core (3) and a lower die core (4) are respectively arranged in the upper die (1) and the lower die (2); the insert (5) is arranged on the kernel of the upper die (1), the lower end of the insert (5) obliquely extends into the upper die core (3) and is combined with the upper die core (3) and the lower die core (4) to form an injection molding cavity; the insert (5) is pushed by an oil cylinder (6) and is movably arranged on the upper die core (3); the method is characterized in that: the insert (5) is connected with a sliding block (7), and the oil cylinder (6) provides power for the sliding block (7) to push the insert (5) to move; a self-locking assembly is arranged between the oil cylinder (6) and the sliding block (7); the self-locking assembly is used for locking the sliding block (7) and the upper die (1) kernel and has a first stroke and a second stroke; when the mold is opened, the self-locking assembly unlocks the sliding block (7) in a first stroke, and pulls the sliding block (7) out of the upper mold (1) in a second stroke, so that the insert is separated from the product.

2. The oil cylinder self-locking mold according to claim 1, characterized in that: the self-locking die comprises a push block (9) and a movable pin (8) which are arranged in a sliding block (7), wherein a pushing groove (702) capable of containing the push block (9) is formed in the sliding block (7), a clearance unlocking groove (7021) is formed in the pushing groove (702), and the distance of movement of the push block (9) in the clearance unlocking groove (7021) is a first stroke.

3. The oil cylinder self-locking mold according to claim 2, characterized in that: the groove width of the clearance unlocking groove (7021) is larger than that of the pushing groove (702), and a limiting convex part (901) is arranged on the pushing block (9) and slides in the clearance unlocking groove (7021); the thickness of the limiting convex part (901) is smaller than the groove distance of the clearance unlocking groove (7021).

4. The oil cylinder self-locking mold according to claim 2, characterized in that: the push block (9) is connected to the oil cylinder (6), and the push block (9) moves in the sliding block (7) by the power provided by the oil cylinder (6); a pin hole (701) capable of accommodating the movable pin (8) is formed in the sliding block (7); the movable pin (8) can extend out of the sliding block (7) under the ejection action of the pushing block (9) to be clamped with the upper die core (3).

5. The oil cylinder self-locking mold according to claim 4, characterized in that: the pushing groove (702) is communicated with the pin hole (701) and is vertically arranged; an ejecting part (902) at the front end of the pushing block (9) is contacted with the movable pin (8) and pushes the movable pin (8) outwards in the pushing process.

6. The oil cylinder self-locking mold according to claim 5, characterized in that: the tip of the pushing part (902) is arranged in a conical shape.

7. The oil cylinder self-locking mold according to claim 2, characterized in that: the upper die (1) is provided with a caulking groove (101) matched with the sliding block (7), and two side walls of the caulking groove (101) are provided with clamping grooves matched with the movable pins (8).

8. The oil cylinder self-locking mold according to claim 2, characterized in that: the upper die core (3) is embedded with a guide block (10), a guide groove (1001) matched with the insert (5) is formed in the guide block (10), and the insert (5) slides in the guide groove (1001) along the inclined direction under the pushing of the sliding block (7).

9. The oil cylinder self-locking mold according to claim 2, characterized in that: the upper end of the insert (5) is a T-shaped sliding end, the contact surface of the sliding block (7) connected with the sliding end is an inclined surface, a sliding groove (703) is formed in the contact surface, and the insert (5) is obliquely connected with the sliding block (7).

10. The oil cylinder self-locking mold according to claim 7, characterized in that: first inclined planes are arranged on two sides of the outer end portion of the movable pin (8), and second inclined planes corresponding to the first inclined planes are arranged on the groove walls of the clamping grooves.