CN105751451B - Cover half has the mold liftout attachment of oblique top - Google Patents

Abstract

The invention discloses a mold ejecting device with a slanted top in a fixed mold, which includes a product cavity formed by a fixed mold assembly and a movable mold assembly (26) when the molds are closed. Ejector mechanism; the fixed mold assembly includes a fixed template (1) and a fixed mold core (10) connected together, and an ejection movable cavity is provided between the fixed mold core (10) and the fixed template (1) (15); the mold ejection device also includes an auxiliary top plate (2), the auxiliary top plate (2) is slidably connected in the ejection movable cavity (15), and the sliding foot assembly of the inclined top mechanism is connected on the auxiliary top plate (2), The inclined top block of the inclined top mechanism is located at the product undercut structure in the fixed mold core (10); the auxiliary top plate (2) is connected with the movable mold assembly (26) through a linkage mechanism. After the above structure is adopted, the mold can be opened smoothly, the action is stable and reliable, and the mold can be opened step by step accurately.

Description

Mold ejection device with inclined top for fixed mold

technical field

The invention relates to the technical field of molds, in particular to a mold ejection device with a fixed mold having an inclined top.

Background technique

At present, plastic products are used in many parts of automobiles, and these plastic products are usually formed by injection molding through injection molds. However, the structure of many products is very complicated. The product shown in Figure 1 has an undercut structure on the inner wall and the outer side of the product body. For the undercut structure, the inclined top mechanism is usually set in the movable mold, but for the undercut structure outside the product, the inclined top mechanism is set in the fixed mold. Since the fixed mold is equipped with an inclined top mechanism, when the fixed mold and the movable mold are opened, the inclined top block in the inclined top mechanism in the fixed mold must first be released from the undercut, and then the product is ejected. , if the mold is not opened step by step, the undercut structure on the product will be destroyed. But there is following shortcoming in the injection mold that has sloping top mechanism in this fixed mold of prior art: what the traditional sloping top mechanism in fixed mold has adopted is the sequence that spring pushes out structure to realize mold opening step by step, but, Once the spring fails, the tilting mechanism in the fixed mold cannot operate normally, resulting in damage to the undercut structure. Therefore, the running stability of the injection mold is poor.

Contents of the invention

The technical problem to be solved by the present invention is to provide a mold ejection device with a sloped top in the fixed mold that is stable and reliable in action and can accurately realize step-by-step mold opening.

In order to solve the above technical problems, the present invention provides a mold ejector with a slanted top in the fixed mold, which includes a product cavity formed when the mold is closed by the fixed mold assembly and the movable mold assembly, and the fixed mold assembly has Inclined top mechanism; the fixed mold assembly includes a fixed template and a fixed mold core connected together, and an ejection movable cavity is provided between the fixed mold core and the fixed template; the mold ejector also includes an auxiliary top plate, The auxiliary top plate is slidably connected in the ejection movable cavity, the sliding foot assembly of the inclined top mechanism is connected to the auxiliary top plate, and the inclined top block of the inclined top mechanism is located at the product undercut structure in the core of the fixed mold; the auxiliary top plate passes through The linkage mechanism is connected with the moving mold assembly.

The linkage mechanism includes a pull rod, a limit block, a sliding block and a slide block spring; the two limit blocks are respectively located on both sides of the pull rod, and the two limit blocks are connected to the lower end surface of the fixed mold core. Fixed connection; there are two sliding blocks, both of which are slidably connected to the movable mold assembly, and the two sliding blocks are respectively located on both sides of the pull rod and between the two limit blocks, and the opposite side of the two sliding blocks The lower end of the pull rod is tightly hugged, and the sliding block and the limit block are pressed tightly by the sliding block spring between the two sliding blocks; the upper end of the pull rod is fixedly connected with the auxiliary top plate, and the middle part of the pull rod is slidably connected with the fixed mold core.

The movable mold assembly is provided with an accommodating cavity for accommodating two limit blocks and two sliding blocks, a boss is provided in the accommodating cavity, and the bottom surface of the two sliding blocks is slidably connected to the bottom of the boss in the horizontal direction. On the end face, two limit blocks are vertically slidably connected to the cavity wall of the accommodating cavity.

The side wall against which the limit block and the sliding block abut is a vertical plane, the side wall between which the limit block and the accommodating cavity wall abut is an inclined plane, and the corresponding cavity wall of the accommodating cavity is also an inclined plane, The limit block has a side wall on one side of the vertical plane, and an edge close to the bottom of the accommodating cavity is provided with a small slope.

The sliding block is a square half block with a hoop structure. The inner hole of the sliding block is provided with an outwardly protruding clip near the upper port, and the lower end of the corresponding pull rod is provided with an inwardly recessed clip slot. The clamping bar on the sliding block is clamped in the slot on the pull rod to lock the sliding block and the pulling rod; the wall below the clamping bar of the sliding block is provided with a radial mounting hole for the spring of the sliding block, and the spring of the sliding block is mounted on the wall The two ends are respectively pressed against the bottom of the sliding block spring mounting holes of the two sliding blocks, so that the side wall of the sliding block is pressed against the vertical side wall of the limiting block; There is a chamfer, and the inclination angle of the chamfer is the same as the inclination angle of the small slope at the bottom of the vertical side wall of the limiting block.

An auxiliary ejector mechanism is provided between the auxiliary top plate and the fixed template, and the auxiliary ejector mechanism includes a roof spring and an auxiliary guide rod; the fixed template is provided with a top spring installation hole coaxial with the top spring installation hole The auxiliary top plate at the line position is provided with a step hole, the large diameter hole of the step hole is opposite to the top plate spring installation hole, and the small diameter hole of the step hole is a threaded hole; one end of the top plate spring is connected to the bottom of the top plate spring installation hole The other end is pressed against the step surface of the step hole; the auxiliary guide rod is sleeved in the top plate spring, and one end of the auxiliary guide rod is threadedly connected with the threaded hole in the step hole.

A limit stopper is installed on the lower end surface of the auxiliary top plate, and the distance between the lower end surface of the limit stopper and the bottom of the ejection movable cavity is the ejection stroke of the auxiliary top plate.

The inclined top mechanism also includes an inclined top block, a guide block and an inclined ejector rod, the lower end of the inclined ejector rod is connected with the inclined top block, the upper end is connected with the sliding foot assembly, the middle part is slidingly connected with the guide block, and the guide block is fixedly connected to the fixed inside the mold core.

The sliding foot assembly includes a sliding foot seat and a sliding foot block, the sliding foot seat is fixedly connected to the auxiliary top plate, an inclined chute is provided on the sliding foot seat, and the upper end of the sliding foot block is limited by the limit structure and the sliding foot seat. Position and sliding connection along the chute; the upper end of the inclined ejector rod is connected with the sliding foot block through a ball joint.

After adopting the above structure, compared with the prior art, the present invention has the following advantages:

1) Since the auxiliary top plate is set in the fixed mold assembly, and the auxiliary top plate is connected with the movable mold assembly through the linkage mechanism, the step-by-step mold opening can be realized. First, the movable mold assembly and the auxiliary top plate are opened synchronously. Die, disengage the inclined top block in the inclined top mechanism from the undercut structure on the product, and then open the fixed mold assembly and the movable mold assembly, completely avoiding damage to the undercut structure of the product, and also avoiding Because of the jamming phenomenon caused by spring ejection, the mold can be opened smoothly, so the movement is stable and reliable, and the mold can be opened step by step accurately;

2) The linkage mechanism adopts two sliding blocks similar to the hoop structure. When the mold is closed, the sliding block is locked with the lower end of the tie rod, realizing the synchronization of the auxiliary top plate and the sliding block, and the side walls of the two sliding blocks and the limit block. The sliding between the vertical side walls also plays a guiding role;

3) The cooperation between the inclined side wall of the limit block and the inclined cavity wall of the accommodating cavity is equivalent to playing a role of wedge locking, so that the limit block can more firmly lock the sliding block and the pull rod together, which ensures more The linkage stability of the linkage mechanism; in addition, the cooperation between the small slope on the limit block and the chamfer on the sliding block, once the sliding block breaks away from the vertical side wall of the limit block, through the cooperation of the chamfer and the small slope , so that the small slope has a guiding effect on the sliding block when the mold is closed again, so that the sliding block can enter between the two limit blocks more smoothly;

4) The auxiliary ejection mechanism composed of the top plate spring and the auxiliary guide rod cooperates with the action of the auxiliary top plate, so that the force acting on the auxiliary top plate is greater, and it is more convenient for the two sliding blocks at the lower end of the pull rod to separate from the pull rod;

5) For the installation of the upper limit stopper of the auxiliary top plate, as long as the end surface of the limit stopper touches the bottom of the ejection movable cavity, it means that the ejection action of the auxiliary top plate is completed, and there will be no excessive ejection phenomenon. The accuracy of the ejection action is guaranteed.

Description of drawings

Fig. 1 is a schematic structural view of a mold ejection device with a slanted top in a fixed mold of the present invention.

Fig. 2 is a schematic diagram of the structure of the sliding block and the tie rod head in the present invention.

Fig. 3 is a schematic diagram of the structure of the limiting block in the present invention.

Among them, 1. Fixed formwork; 2. Auxiliary top plate; 3. Sliding foot seat; 4. Chute; 5. Sliding foot block; 6. Limit block; 7. Guide block; Top block; 10, fixed mold core; 11, top plate spring installation hole; 12, top plate spring; 13, auxiliary guide rod; 14, step hole; 15, ejection movable cavity; 16, pull rod; , sliding block spring; 19, limit block; 20, boss; 21, card slot; 22, card strip; 23, chamfering; 24, sliding block spring mounting hole; 25, small slope; 26, moving mold assembly , 27, accommodating cavity.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

It can be seen from the structural schematic diagram of the mold ejection device with inclined top in the fixed mold of the present invention shown in Figs. There is an inclined top mechanism in the fixed mold assembly. The fixed mold assembly includes a fixed mold plate 1 and a fixed mold core 10 connected together, and an ejection movable cavity 15 is provided between the fixed mold core 10 and the fixed mold plate 1 . The mold ejection device also includes an auxiliary top plate 2, the auxiliary top plate 2 is slidingly connected in the ejection movable cavity 15, the sliding foot assembly of the inclined top mechanism is connected on the auxiliary top plate 2, and the inclined top block of the inclined top mechanism is located in the fixed mold core. 10 at the undercut structure of the product; the auxiliary top plate 2 is connected with the movable mold assembly 26 through a linkage mechanism.

The linkage mechanism includes a pull rod 16 , a limiting block 19 , a sliding block 17 and a sliding block spring 18 . There are two limiting blocks 19 , which are respectively located on both sides of the pull rod 16 , and the two limiting blocks 19 are fixedly connected to the lower end surface of the fixed mold core 10 . There are two sliding blocks 17, both of which are slidably connected to the movable mold assembly 26, and the two sliding blocks 17 are respectively located on both sides of the pull rod 16 and between the two limit blocks 19, and the two sliding blocks 17 are opposite to each other. One side and the lower end of the pull rod 16 are tightly hugged, and the sliding block 17 is pressed against the limit block 19 by the sliding block spring 18 between the two sliding blocks 17 . The upper end of the tie rod 16 is fixedly connected with the auxiliary top plate 2 , and the middle part of the tie rod 16 is slidably connected with the fixed mold core 10 .

The movable mold assembly 26 is provided with an accommodating cavity 27 for accommodating two limit blocks 19 and two sliding blocks 17, a boss 20 is arranged in the accommodating cavity 27, and the bottom surfaces of the two sliding blocks 17 are horizontal The direction is slidably connected to the end surface of the boss 20 , and the two limit blocks 19 are slidably connected to the cavity wall of the accommodating cavity 27 in the vertical direction.

The side wall against which the limiting block 19 and the sliding block 17 abut is a vertical plane, the side wall against which the limiting block 19 is abutting against the cavity wall of the accommodating cavity 27 is an inclined plane, and the cavity wall of the corresponding accommodating cavity 27 It is also an inclined plane, and the side wall of the limit block 19 having a vertical plane is provided with a small inclined plane 25 on the edge close to the bottom of the accommodating cavity 27 .

The sliding block 17 is a square half block with a hoop structure. The inner hole of the sliding block 17 is provided with an outwardly protruding clip bar 22 near the upper port, and the lower end of the corresponding pull rod 16 is provided with an inwardly recessed clip slot 21. When the mold is closed, the clips 22 on the two sliding blocks 17 are clamped in the slots 21 on the pull rod 16 so that the slide block 17 and the pull rod 16 are locked. The wall below the sliding block 17 clip 22 is provided with a radial sliding block spring mounting hole 24, and the two ends of the sliding block spring 18 are pressed against the bottom of the sliding block spring mounting hole 24 of the two sliding blocks 17 respectively. Thereby, the side wall of the sliding block 17 is pressed against the vertical side wall of the limiting block 19 . The upper edge of the sliding block 17 near the limit block 19 is provided with a chamfer 23 whose inclination angle is the same as that of the small slope 25 at the bottom of the vertical side wall of the limit block 19 .

An auxiliary ejection mechanism is provided between the auxiliary top plate 2 and the fixed template 1 , and the auxiliary ejection mechanism includes a top plate spring 12 and an auxiliary guide rod 13 . The fixed template 1 is provided with a top plate spring installation hole 11, and the auxiliary top plate 2 at the coaxial position with the top plate spring installation hole 11 is provided with a step hole 14, and the large diameter hole of the step hole 14 is connected with the top plate spring installation hole 11. In contrast, the small-diameter hole of the stepped hole 14 is a threaded hole. One end of the top plate spring 12 is pressed against the bottom of the top plate spring mounting hole 11 , and the other end is pressed against the stepped surface of the stepped hole 14 . The auxiliary guide rod 13 is sleeved in the roof spring 12 , and one end of the auxiliary guide rod 13 is threadedly connected with the threaded hole in the stepped hole 14 .

A limit block 6 is installed on the lower end surface of the auxiliary top plate 2 , and the distance between the lower end surface of the limit block 6 and the cavity bottom of the ejection movable chamber 15 is the ejection stroke of the auxiliary top plate 2 .

The inclined jacking mechanism also includes an inclined jacking block 9, a guide block 7 and an inclined jacking rod 8, the lower end of the inclined jacking rod 8 is connected with the inclined jacking block 9, the upper end is connected with the sliding foot assembly, and the middle part is slidably connected with the guide block 7, The guide block 7 is fixedly connected in the core 10 of the fixed mold.

The slider assembly includes a slider base 3 and a slider block 5, the slider base 3 is fixedly connected to the auxiliary top plate 2, the slider base 3 is provided with an inclined chute 4, and the upper end of the slider block 5 passes through a limit The bit structure is limited with the sliding foot seat 3 and is slidably connected along the chute 4. The upper end of the inclined ejector rod 8 is connected with the sliding foot block 5 through a ball joint.

The working process of the demoulding device of the present invention is as follows:

When the injection mold is in the mold clamping state, the sliding block 17 is clamped by the limit block 19, so that the sliding block 17 and the lower end of the pull rod 16 are tightly hugged, and the pull rod 16 and the movable mold assembly 26 are connected together, while the upper end of the pull rod 16 It is fixedly connected with the auxiliary top plate 2. In this way, when the mold is opened, the movable mold assembly 26 moves downward, pulling the pull rod 16 and the auxiliary top plate 2 to move downward together. Through the action of the inclined top mechanism, the inclined top block 9 Release from the undercut structure of the product. The sliding block 17 slides along the vertical side wall of the limiting block 19 until the chamfer 23 at the upper end of the sliding block 17 reaches the position of the small slope 25 at the lower end of the limiting block 19, the sliding block 17 loses the limiting effect of the limiting block 19 force, under the action of the sliding block spring 18, the sliding block 17 is bounced outwards, and at this time, the clip bar 22 on the sliding block 17 is completely disengaged from the draw-in groove 21 on the pull rod 16, and the pull rod is not affected by the sliding block 17. Limitation, that is to say, the movable mold assembly 26 has no linkage effect with the auxiliary top plate 2, and the movable mold assembly 26 continues to open the mold until the product is taken out.

When the injection mold begins to close the mold, the movable mold assembly 26 moves in the reverse direction, and the chamfer 23 at the upper end of the sliding block 17 first contacts the small slope 25 at the lower end of the limit block 19, and the two slide under the guidance of the small slope 25 The block 17 gradually slides inwards and contracts until the clip bar 22 on the sliding block 17 completely hugs the slot 21 on the pull rod 16. At this time, the synchronous connection between the movable mold assembly 26 and the auxiliary top plate 2 is completed, and the movable mold assembly 26 Continue to advance upwards, forcing the auxiliary top plate 2 to press the top plate spring 12 to compress until the mold clamping is in place, waiting for the next injection molding.

The above is only a preferred and feasible implementation example of the present invention, and cannot therefore limit the scope of rights of the present invention. All corresponding changes should fall within the protection scope of the claims of the present invention.

Claims (8)

1. having the mold liftout attachment of oblique top in a kind of cover half, it is included by cover half component and dynamic model component (26) in matched moulds When the product die cavity that is formed, there is pitched roof mechanism in cover half component；It is characterized in that：Described cover half component includes being connected to one The solid plate (1) and cover half core rod (10) risen, ejection movable chamber (15) is provided between cover half core rod (10) and solid plate (1)；Should Mold liftout attachment also includes assistant ceiling (2), and assistant ceiling (2) is slidably connected in ejection movable chamber (15), pitched roof mechanism Shoes component be connected on assistant ceiling (2), the slanted kicking block of pitched roof mechanism is located at the product back-off knot in cover half core rod (10) At structure；Described assistant ceiling (2) is connected by link gear with dynamic model component (26)；Described link gear includes pull bar (16), limited block (19), sliding shoe (17) and sliding shoe spring (18)；Described limited block (19) is two, respectively positioned at drawing The both sides of bar (16), lower surface of two limited blocks (19) with cover half core rod (10) are fixedly connected；Described sliding shoe (17) For two, it is slidably connected on dynamic model component (26), and two sliding shoes (17) are located at pull bar (16) both sides simultaneously respectively Between two limited blocks (19), the relative side of two sliding shoes (17) and the lower end of pull bar (16) are held tightly, two slips Sliding shoe (17) and limited block (19) are pushed against by sliding shoe spring (18) between block (17)；The upper end of described pull bar (16) It is fixedly connected with assistant ceiling (2), middle part and the cover half core rod (10) of pull bar (16) are slidably connected.

2. there is the mold liftout attachment of oblique top in cover half according to claim 1, it is characterised in that：Described dynamic model group Part (26) is provided with the accommodating cavity (27) for housing two limited blocks (19) and two sliding shoes (17), is provided with accommodating cavity (27) Boss (20), the bottom surface horizontal direction of two sliding shoes (17) are slidably connected on the end face of boss (20), two limited blocks (19) vertical direction is slidably connected in the cavity wall of accommodating cavity (27).

3. there is the mold liftout attachment of oblique top in cover half according to claim 2, it is characterised in that：Described limited block (19) side wall pushed against with sliding shoe (17) is perpendicular, and limited block (19) is to incline with the side wall that accommodating cavity (27) cavity wall pushes against Tapered plane, the cavity wall of corresponding accommodating cavity (27) is also clinoplain, and the side wall that limited block (19) has perpendicular side is leaned on The edge of nearly accommodating cavity (27) bottom is provided with small inclined-plane (25).

4. there is the mold liftout attachment of oblique top in cover half according to claim 3, it is characterised in that：Described sliding shoe (17) outstanding card article (22) is provided with upper port for the square half block of hooping structure, the endoporus of sliding shoe (17), The lower end of corresponding pull bar (16) is provided with the neck (21) to concave, card article (22) clamping during matched moulds on two sliding shoes (17) So that sliding shoe (17) and pull bar (16) be locked in neck (21) on pull bar (16)；Under the card article (22) of sliding shoe (17) The wall body of side is provided with the sliding shoe spring mounting hole (24) of radial direction, and the both ends of sliding shoe spring (18) are pushed against two cunnings respectively At sliding shoe spring mounting hole (24) bottom hole of motion block (17), so as to by the vertical of the side wall of sliding shoe (17) and limited block (19) Side wall pushes against；Sliding shoe (17) is provided with chamfering (23), the inclination angle of the chamfering (23) at the upper end-face edge of limited block (19) Degree is identical with the angle of inclination on the small inclined-plane (25) of limited block (19) upright side walls bottom.

5. there is the mold liftout attachment of oblique top in cover half according to claim 1, it is characterised in that：Described auxiliary top Auxiliary ejection mechanism is provided between plate (2) and solid plate (1), the auxiliary ejection mechanism includes top plate spring (12) and secondary guide (13)；Described solid plate (1) is provided with top plate spring mounting hole (11), with top plate spring mounting hole (11) coaxial position Assistant ceiling (2) be provided with stepped hole (14), the large diameter hole of stepped hole (14) with top plate spring mounting hole (11) relatively, platform The small diameter bore in rank hole (14) is screwed hole；One end of described top plate spring (12) and the bottom hole of top plate spring mounting hole (11) Push against, the step surface of the other end and stepped hole (14) pushes against；Described secondary guide (13) is socketed in top plate spring (12), and And one end of secondary guide (13) is threadedly coupled with screwed hole in stepped hole (14).

6. there is the mold liftout attachment of oblique top in cover half according to claim 1, it is characterised in that：Described auxiliary top Positive stop (6), lower surface and the bottom of chamber of ejection movable chamber (15) of positive stop (6) are installed on the lower surface of plate (2) Distance is the ejection stroke of assistant ceiling (2).

7. there is the mold liftout attachment of oblique top in cover half according to claim 1, it is characterised in that：Described oblique top machine Structure also includes slanted kicking block (9), guide pad (7) and angle ejector rod (8), and the lower end of angle ejector rod (8) is connected with slanted kicking block (9), upper end with Shoes component is connected, and middle part is slidably connected with guide pad (7), and guide pad (7) is fixedly connected in cover half core rod (10).

8. there is the mold liftout attachment of oblique top in cover half according to claim 7, it is characterised in that：Described shoes group Part includes shoes seat (3) and shoes block (5), and shoes seat (3) is fixedly connected on assistant ceiling (2), and shoes seat (3), which is provided with, to incline Oblique chute (4), the upper end of shoes block (5) is spacing with shoes seat (3) by position limiting structure and is slidably connected along chute (4)；Tiltedly The upper end of push rod (8) is connected with shoes block (5) by bulb.