CN217047365U - Injection mold slider internal-pulling deformation demoulding mechanism - Google Patents

Abstract

An injection mold sliding block internal pulling deformation demoulding mechanism comprises an upper compound plate and a lower compound plate, wherein a base plate is arranged below the upper compound plate, a runner plate is arranged in the base plate, a fixed template is arranged below the base plate, the lower compound plate is provided with mould feet, the lower compound plate between the mould feet is provided with an upper thimble plate, a lower thimble plate and thimbles, the mould feet are provided with a movable mould plate, the movable mould plate is provided with a movable mould core and a side slide block, an injection molding plastic piece is arranged among the fixed die plate, the movable die core and the side slide block, two sides of the plastic piece are provided with side plates, the side plates are provided with inward concave edges in arc shape, the inner walls of the side plates are provided with buckles, the bottom of the side sliding block is provided with a limit sliding chute, a tensile deformation sliding block is arranged in the limit chute, a spring is arranged between one end of the tensile deformation sliding block and the side sliding block, the upper part of the sliding block is provided with a limiting block, the limiting block is matched with the limiting sliding groove, the other end of the sliding block is provided with a pull rod which is bent upwards, and the pull rod is contacted with the inner wall of the inner concave edge of the plastic part.

Description

Injection mold slider internal-pulling deformation demoulding mechanism

Technical Field

The utility model relates to an injection mold especially relates to draw deformation demoulding mechanism in injection mold slider.

Background

When the injection mold is adopted to produce plastic products, such as motorcycle mud guards, the two sides of the motorcycle mud guards are provided with side plates, the inner walls of the side plates are provided with buckles, and the side plates are also provided with arc-shaped concave edges, so that the plastic products can not be directly ejected and demoulded. The existing mode is usually to set up interior slider of loosing core on the movable mould core, utilize interior slider of loosing core inwards to remove the buckle structure of taking out the motorcycle fender, and break away from the contact with the indent limit of curb plate, make the indent limit can upwards ejecting drawing of patterns, if the indent distance on indent limit is too big, the distance of interior slider of loosing core inwards moving is in order very big, consequently, the inside enough space that need of injection mold, just enable interior slider of loosing core inwards to slide and loose core, to some compact structure's injection mold, this interior structure of loosing core then can't be realized, if do the mould volume greatly, then need the injection molding machine of bigger tonnage, the development cost of mould has been improved.

Disclosure of Invention

The utility model aims at overcoming the shortcoming that prior art exists, providing one kind and reducing the mould volume, reduce mould development cost, guarantee the smooth drawing deformation demoulding mechanism in the injection mold slider of drawing of patterns of plastic products.

The utility model discloses draw in injection mold slider deformation demoulding mechanism's technical scheme is: comprises an upper doubling plate and a lower doubling plate, a backing plate is arranged below the upper doubling plate, a runner plate is arranged in the backing plate, a fixed template is arranged below the backing plate, the lower compound plate is provided with mould feet, the lower compound plate between the mould feet is provided with an upper thimble plate, a lower thimble plate and thimbles, the mould feet are provided with a movable mould plate, the movable mould plate is provided with a movable mould core and a side slide block, an injection molding plastic piece is arranged among the fixed die plate, the movable die core and the side slide block, two sides of the plastic piece are provided with side plates, the side plates are provided with inward concave edges in arc shape, the inner walls of the side plates are provided with buckles, the bottom of the side sliding block is provided with a limit sliding groove, a pull deformation sliding block is arranged in the limit groove, a spring is arranged between one end of the pull deformation sliding block and the side sliding block, the upper part of the sliding block is provided with a limiting block, the limiting block is matched with the limiting sliding groove, the other end of the sliding block is provided with a pull rod which is bent upwards, and the pull rod is contacted with the inner wall of the inner concave edge of the plastic part.

The utility model discloses an injection mold slider inward-pulling deformation demoulding mechanism, when a plastic piece is injection molded, the mold is opened from a fixed mold plate and a movable mold plate, a side slider is driven by power to slide outwards, the side slider gradually separates from contact with the outer wall of a side plate of the plastic piece outwards, when the side slider slides outwards, the side slider is propped against the pulling deformation slider by a spring, the pulling deformation slider is propped against a movable mold core, the pulling deformation slider firstly keeps still, when the side slider moves outwards to make a limiting chute at the bottom of the side slider in limiting contact with a limiting block on the pulling deformation slider, the side slider drives the limiting block to move outwards together, the limiting block drives the pulling deformation slider to move outwards together, the pulling deformation slider drives a pull rod to move outwards, the lower part of an inward concave edge of the plastic piece is propped outwards by the pull rod, and the inward concave edge is propped outwards to separate from the movable mold core due to certain elastic deformation capacity, and the driving buckle also takes off the movable mould core, and when taking off, the upper and lower thimble plates drive the thimble to push the plastic piece out of the mould. This scheme injection mold slider internal tension warp demoulding mechanism through the concave edge of drawing deformation slider and pull rod pulling working of plastics, utilizes plastic material's elasticity, makes it deviate from the movable mould core after can elastic deformation, need not interior structure of loosing core, also need not do the mould volume big, simple structure, and the drawing of patterns is convenient, the effectual development cost who reduces the mould.

The utility model discloses drawing deformation demoulding mechanism in injection mold slider, the high H of pull rod and interior concave edge contact be 30 mm-60 mm. The contact height of pull rod and indent limit is 30 mm-60 mm, can guarantee that the pull rod draws the curb plate and the indent limit of working of plastics to warp, and draw the back of warping, the indent limit can deviate from smoothly between pull rod and the side slider, if the contact is too high, the contact surface just is big more, the pull rod compresses tightly more reliably to the indent limit, the indent limit is difficult to deviate from between pull rod and the side slider, it is low excessively if the contact, the contact surface is just few, the pull rod is poor to the reliability that compresses tightly of indent limit, when the indent limit is for deviating from the movable mould core completely, it just can break away from the pull rod, the curb plate and the indent limit that lead to the working of plastics are wrapped at the movable mould core outer wall again, and can't be ejecting with the working of plastics.

Drawings

FIG. 1 is a schematic structural view of an injection mold slide block internal pulling deformation demolding mechanism of the present invention;

FIG. 2 is a schematic view of the structure of the side slider, the tension-deformed slider, and the plastic member in a state of being engaged with each other;

FIG. 3 is a perspective view of the side slider, the tension-deformed slider, and the plastic member in a fitted state;

fig. 4 is a perspective view of a plastic part.

Detailed Description

The utility model relates to an injection mould slider internal pulling deformation demoulding mechanism, as shown in figures 1-4, comprising an upper compound plate 1 and a lower compound plate 2, a backing plate 3 is arranged under the upper compound plate, a runner plate 4 is arranged in the backing plate, a fixed template 5 is arranged under the backing plate, mold feet 6 are arranged on the lower compound plate, an upper thimble plate 7, a lower thimble plate 8 and thimbles 9 are arranged on the lower compound plate between the mold feet, a movable template 10 is arranged on the mold feet, a movable mold core 11 and side sliders 12 are arranged on the movable template, injection molding plastic pieces 13 are arranged between the fixed template 5, the movable mold core 11 and the side sliders 12, side plates 14 are arranged on two sides of the plastic pieces, an arc inward concave edge 15 is arranged on the side plates, a buckle 16 is arranged on the inner wall of the side plates, a limit chute 17 is arranged at the bottom of the side sliders 12, a pulling deformation slider 18 is arranged in the limit chute, a spring 19 is arranged between the pulling deformation slider and the side sliders 12, the upper portion system has stopper 20, and the stopper cooperatees with spacing spout 17, and another system of drawing the deformation slider has kickup's pull rod 21, and the pull rod contacts with the interior concave edge 15 inner wall of working of plastics 13. After the plastic piece 13 is injection molded, the mold is opened from the fixed mold plate 5 and the movable mold plate 10, the side slide block 12 is driven by power to slide outwards, the side slide block gradually disengages from the outer wall of the side plate 14 of the plastic piece 13, when the side slide block slides outwards, the spring 19 pushes the pull deformation slide block 18 to push the pull deformation slide block against the movable mold core 11, the pull deformation slide block is firstly kept still, when the side slide block 12 moves outwards to make the limit chute 17 at the bottom of the side slide block in limit contact with the limit block 20 on the pull deformation slide block 18, the side slide block drives the limit block to move outwards together, the limit block drives the pull deformation slide block to move outwards together, the pull deformation slide block drives the pull rod 21 to move outwards, the pull rod pulls the lower part of the concave edge 15 of the plastic piece 13 to elastically expand outwards, because of certain elastic deformation capability, the concave edge outwards expands to separate from the movable mold core 11, and drives the buckle 16 to separate from the movable mold core, when the plastic part 13 is taken off, the ejector pins 9 are driven by the upper ejector pin plate 7 and the lower ejector pin plate 8 to eject the plastic part 13 upwards for demoulding. This scheme injection mold slider internal stretching deformation demoulding mechanism through stretching deformation slider 18 and pull rod 21 pulling working of plastics 13's indent limit 15, utilizes plastic material's elasticity, makes it deviate from movable mould core 11 after can elastic deformation, need not interior structure of loosing core, also need not do the mould volume greatly, simple structure, the drawing of patterns is convenient, the effectual development cost that reduces the mould. The contact height H of the pull rod 21 and the inner concave edge 15 is 30 mm-60 mm. The contact height of the pull rod 21 and the inner concave edge 15 is 30 mm-60 mm, the side plate 14 and the inner concave edge 15 of the plastic piece 13 can be guaranteed to be deformed by pulling the pull rod 21, after the deformation, the inner concave edge 15 can be smoothly separated from the position between the pull rod 21 and the side sliding block 12, if the contact is too high, the contact surface is larger, the pull rod compresses the inner concave edge more reliably, the inner concave edge is not easy to separate from the position between the pull rod 21 and the side sliding block 12, if the contact is too low, the contact surface is less, the compression reliability of the inner concave edge by the pull rod is poor, when the inner concave edge is completely separated from the movable mold core 11, the pull rod 21 can be separated from the inner concave edge, the side plate 14 and the inner concave edge 15 of the plastic piece 13 are wrapped on the outer wall of the movable mold core again, and the plastic piece cannot be ejected out.

Claims (2)

1. Draw deformation demoulding mechanism in injection mold slider, including last compound plate (1) and lower compound plate (2), set up backing plate (3) under going up the compound plate, set up runner plate (4) in the backing plate, set up fixed die plate (5) under the backing plate, set up mould foot (6) under on the compound plate, set up thimble board (7) on the lower compound plate between the mould foot, thimble board (8) and thimble (9) down, set up movable mould board (10) on the mould foot, set up movable mould core (11) and side slider (12) on the movable mould board, at fixed die plate (5), there are injection moulding's working of plastics (13) between movable mould core (11) and side slider (12), the both sides system of curb plate (14), the system has arc inside indent limit (15) on the curb plate, curb plate inner wall system has buckle (16), its characterized in that: side slider (12) bottom system have spacing spout (17), set up in the spacing groove and draw and warp slider (18), set up spring (19) between one end of drawing and warping the slider and side slider (12), its upper portion system has stopper (20), the stopper cooperatees with spacing spout (17), another system of drawing and warping the slider has kickup's pull rod (21), the pull rod contacts with the indent limit (15) inner wall of working of plastics (13).

2. The injection mold slide internal pulling deformation demolding mechanism of claim 1, characterized in that: the height H of the contact between the pull rod (21) and the concave edge (15) is 30-60 mm.

Images