Injection molding die for deep cavity structural productTechnical Field
The invention belongs to the technical field of injection molding, and particularly relates to an injection molding die for a deep cavity structure product.
Background
For products with large cavity structures in the middle and large cavity depths in the liquid storage barrel, a forming mold of the products is usually provided with a core for forming the cavity structures.
When the mold is opened, a plurality of straight pushing structures are usually arranged on the mold core for demolding the product. Because the cavity is deeper, in order to take off smoothly after the die sinking, the stroke of straight pushing structure is great, makes the structure of injection molding machine complicated, has directly pushed the manufacturing or the acquisition cost of equipment.
In summary, it is clear that the prior art has inconvenience and defects in practical use, so that improvement is needed.
Disclosure of Invention
Aiming at the defects, the invention mainly provides an injection molding die for a deep cavity structure product, which solves the technical problems of large demolding stroke and complex equipment structure of the deep cavity structure product.
In order to solve the problems, the invention provides an injection molding die for a deep cavity structure product, which is provided with a cavity, wherein one end of the cavity is of an opening structure, and the other end of the cavity is of a bottom sealing structure;
The movable die is provided with a die cavity, a core print seat is fixedly arranged in the die cavity, and a core for forming a product cavity is fixedly arranged on the core print seat;
The die cavity of the movable die is also provided with a push plate frame sleeved with the core in an annular mode, the inner annular wall of the push plate frame is in fit with the outer wall of the core, the inner annular wall of the push plate frame is provided with a step surface and a forming surface, the push plate frame is fixedly connected with a push rod, and the push rod sequentially slides and penetrates through the core seat, the movable die and the movable die plate.
According to the injection molding mold for the deep cavity structural product, the fixed mold plate is fixedly provided with the convex blocks positioned in the cavity, and the convex blocks are provided with the plurality of air outlet holes.
According to the injection molding mold for the deep cavity structural product, the through hole is formed in the fixed mold plate, the air supply pipe is arranged in the through hole, and the air outlet end of the air supply pipe is communicated with the air outlet hole.
According to the injection molding die for the deep cavity structural product, the side wall of the movable die cavity is an inclined surface, and the outer annular wall of the push plate frame is matched with the inclined surface.
According to the injection molding die for the deep cavity structural product, the side wall of the movable die cavity is fixedly provided with the limit plate.
According to the injection molding mold for the deep cavity structural product, the insert pin is arranged on the mold core, and the yielding notch for avoiding the insert pin is arranged on the inner annular wall of the push plate frame.
According to the injection molding mold for the deep cavity structural product, the movable mold plate is fixedly provided with the plurality of push plate frame guide rods, and the push plate frame guide rods sequentially movably penetrate through the movable mold, the core print seat and the push plate frame.
According to the injection molding mold for the deep cavity structural product, the push plate frame is provided with the guide hole, and the guide sleeve which is in sliding sleeve joint fit with the guide rod of the push plate frame is arranged in the guide hole.
According to the injection molding die for the deep cavity structural product, the push plate frame is fixedly connected with the positioning block, and the movable die is provided with the positioning groove matched with the positioning block.
According to the injection molding die for the deep cavity structural product, the movable die is provided with the die guide post which is matched with the fixed die in a sliding and penetrating way.
In summary, the push plate frame is arranged, so that the opening of the product is pushed to be separated from the mold core during mold opening. The pushing travel is reduced, the structure of the injection molding machine is effectively simplified, and the manufacturing cost of equipment is reduced.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of the movable mold in FIG. 1;
FIG. 3 is a schematic view of the partial cut-away structure of FIG. 2;
FIG. 4 is a schematic view of the structure of the push plate frame of the present invention;
FIG. 5 is a schematic view of the bottom view of the stationary platen of the present invention;
FIG. 6 is a schematic view showing the bottom view of the stationary mold of the present invention;
In the drawing, 1-movable mould, 11-movable mould plate, 12-mould guide post, 13-push plate frame guide rod, 14-limit plate, 2-fixed mould, 21-fixed mould plate, 22-convex block, 23-air outlet hole, 24-through hole, 25-cavity, 3-push plate frame, 31-push rod, 32-positioning block, 33-step surface, 34-abdication notch, 35-guide hole, 36-molding surface, 4-core seat, 41-insert needle and 100-product.
Detailed Description
Referring to fig. 1, the invention provides an injection molding mold for a deep cavity structure product, wherein the product 100 is provided with a cavity, one end of the cavity is of an opening structure, and the other end of the cavity is of a bottom sealing structure, and the injection molding mold comprises a fixed mold 2 and a movable mold 1, wherein the fixed mold 2 is fixedly arranged on a fixed mold plate 21, and the movable mold 1 is fixedly arranged on a movable mold plate 11;
referring to fig. 2 and 3, the movable mold 1 is provided with a mold cavity, a core print seat 4 is fixedly arranged in the mold cavity, and a core for forming a cavity of the product 100 is fixedly arranged on the core print seat 4;
Referring to fig. 6, the fixed mold 2 is provided with a cavity 25 for matching with the core, after the mold is closed, raw materials are filled between the core and the cavity 25, and after the raw materials are cooled, the product 100 is formed;
the mold cavity of the movable mold 1 is also provided with a push plate frame 3 sleeved with the mold core in an annular mode, the inner annular wall of the push plate frame 3 is in fit with the outer wall of the mold core, the outer annular wall is in fit with the side wall of the mold cavity of the movable mold 1, and the positioning of the push plate frame 3 is realized through the contact fit of the mold core and the surface of the mold cavity.
Referring to fig. 4, the inner annular wall of the push plate frame 3 is provided with a step surface 33 and a molding surface 36 formed by outward yielding, the push plate frame 3 is fixedly connected with a push rod 31, and the push rod 31 sequentially slides and penetrates through the core print seat 4, the movable die 1 and the movable die plate 11;
the inner annular wall of the push plate frame 3 is attached to the outer wall of the core, and an opening structure of the product 100 is formed between the molding surface 36 and the core. After the product 100 is molded, the step surface 33 is attached to the end surface of the opening structure of the product 100.
When the mold is opened, a pushing force is applied to the push rod 31, and the push plate frame 3 is moved in the mold cavity in the mold opening direction. The step surface 33 pushes the end surface of the opening structure of the product 100 to separate the product 100 from the core. The push rod 31 of the present invention may be driven by an oil cylinder or by a ram carried by the injection molding machine itself.
The present invention provides a push plate frame 3 that pushes the opening structure of the product 100 to be separated from the core when the mold is opened. The pushing travel is reduced, the structure of the injection molding machine is effectively simplified, and the manufacturing cost of equipment is reduced.
The invention is applicable to product pieces with high aspect ratio chambers, such as containers with barrel-shaped or cup-shaped structures, e.g. liquid storage barrels, water storage cups, etc.
As one embodiment, the insert pin 41 is arranged on the core, and the yielding notch 34 is arranged on the inner annular wall of the push plate frame 3 and used for avoiding the insert pin 41.
As an embodiment, the side wall of the die cavity of the movable die 1 is an inclined surface, and the outer annular wall of the push plate frame 3 is matched with the inclined surface. After the push plate frame 3 is pushed, the outer annular wall of the push plate frame is separated from contact with the side wall of the die cavity, so that the pushing resistance is reduced.
Furthermore, a limiting plate 14 is fixedly arranged on the side wall of the die cavity of the movable die 1 to limit the pushing stroke of the push plate frame 3.
As an embodiment, a plurality of push plate frame guide rods 13 are fixedly arranged on the movable template 11, the push plate frame guide rods 13 sequentially movably penetrate through the movable template 1, the core print seat 4 and the push plate frame 3, so that the movement posture of the push plate frame 3 is stable, and accurate reset can be realized.
Furthermore, the push plate frame 3 is provided with a guide hole 35, a guide sleeve matched with the push plate frame guide rod 13 in a sliding sleeve joint manner is arranged in the guide hole 35, and the guide sleeve is matched with the push plate frame guide rod 13, so that the abrasion of the push plate frame guide rod 13 is reduced, the service life is prolonged, and meanwhile, the assembly is convenient.
As an embodiment, the push plate frame 3 is fixedly connected with the positioning block 32, and the movable mold 1 is provided with a positioning groove matched with the positioning block 32. When the mold is closed, the fixed mold 2 pushes the positioning block 32 to reset the push plate frame 3.
As an embodiment, the moving mold 1 is provided with a mold guide post 12 slidably connected with the fixed mold 2 in a penetrating manner.
As an embodiment, the fixed die plate 21 is fixedly provided with the protruding block 22 in the die cavity 25, the protruding block 22 is used for forming the bottom sealing structure of the product 100, the protruding block 22 is provided with a plurality of air outlet holes 23, and when the die is opened, air is fed through the air outlet holes 23 to promote the separation of the bottom sealing structure of the product 100 and the protruding block 22, so that the adhesive force between the product 100 and the protruding block 22 is reduced, and the bottom sealing structure of the product 100 is prevented from being torn when the die is opened.
Further, a through hole 24 is formed in the fixed mold plate 21, an air supply pipe is arranged in the through hole 24, and an air outlet end of the air supply pipe is communicated with the air outlet hole 23.
In summary, the present invention provides an injection molding mold for a deep cavity product, in which a push plate frame is provided to push an opening of the product to be separated from a core during mold opening. The pushing travel is reduced, the structure of the injection molding machine is effectively simplified, and the manufacturing cost of equipment is reduced.
Of course, the present invention is capable of other various embodiments and its several details are capable of modification and variation in light of the present invention, as will be apparent to those skilled in the art, without departing from the spirit and scope of the invention as defined in the appended claims.