Injection molding mold for product with deep cavity structure

Abstract

The invention relates to the technical field of injection molding, and provides an injection molding mold for a deep-cavity structure product, the product 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; the forming mold comprises a fixed mold and a movable mold; the fixed mold is fixedly arranged on the fixed mold plate, and the movable mold is fixedly arranged on the movable mold plate; a mold cavity is formed in the movable mold, a mold core seat is fixedly arranged in the mold cavity, and a mold core used for forming a product cavity is fixedly arranged on the mold core seat; a push plate frame which is annularly connected with the mold core in a sleeving manner is also arranged in the mold cavity of the movable mold; the inner ring wall of the push plate frame is fitted and matched with the outer wall of the mold core; a step surface and a forming surface are arranged on the inner ring wall of the push plate frame; a push rod is further fixedly connected to the push plate frame and is sequentially connected with the core seat, the movable mold and the movable mold plate in a sliding and penetrating manner. Therefore, by arranging the push plate frame, the opening of the product is pushed to be separated from the mold core during mold opening. The pushing stroke is reduced, the structure of the injection molding machine is effectively simplified, and the equipment manufacturing cost is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of injection molding, and in particular relates to an injection molding mold for a product with a deep cavity structure. Background Art

[0002] For a product such as a liquid storage barrel that has a large cavity structure in the middle and a large cavity depth, the molding mold usually has a core for molding the cavity structure.

[0003] When the mold is opened, multiple direct push structures are usually set on the core to realize the demoulding of the product. Due to the deep cavity, in order to smoothly remove the product after the mold is opened, the stroke of the direct push structure is large, which makes the structure of the injection molding machine complex and directly increases the manufacturing or purchase cost of the equipment.

[0004] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Summary of the invention

[0005] In view of the above-mentioned defects, the present invention mainly provides an injection molding mold for deep cavity structure products, which solves the technical problem that the demoulding stroke of deep cavity structure products is large and the equipment structure is complicated.

[0006] In order to solve the above problems, the present invention provides an injection molding mold for a deep cavity structure product, the product having a cavity, one end of the cavity is an open structure, and the other end is a bottom sealing structure; the molding mold comprises a fixed mold and a movable mold; the fixed mold is fixed on the fixed mold plate, and the movable mold is fixed on the movable mold plate;

[0007] The movable mold is provided with a mold cavity, a core seat is fixed in the mold cavity, and a core for forming a product cavity is fixed on the core seat;

[0008] The mold cavity of the movable mold is also provided with a push plate frame which is annularly sleeved with the core; the inner ring wall of the push plate frame fits with the outer wall of the core; the inner ring wall of the push plate frame has a step surface and a molding surface; the push plate frame is also fixed with a push rod, which slides through the core seat, the movable mold and the movable mold plate in sequence.

[0009] According to the injection molding die for deep cavity structure products of the present invention, a convex block located in the cavity is fixedly arranged on the fixed mold plate; and a plurality of air outlet holes are opened on the convex block.

[0010] According to the injection molding die for deep cavity structure products of the present invention, a through hole is opened on the fixed mold plate, an air supply pipe is arranged in the through hole, and the air outlet end of the air supply pipe is connected to the air outlet hole.

[0011] According to the injection molding die for deep cavity structure products of the present invention, the side wall of the movable mold cavity is an inclined surface; and the outer ring wall of the push plate frame is matched with the inclined surface.

[0012] According to the injection molding die for deep cavity structure products of the present invention, a limiting plate is fixedly provided on the side wall of the movable mold cavity.

[0013] According to the injection molding die for deep cavity structure products of the present invention, the core is provided with an insert pin; and the inner ring wall of the push plate frame is provided with a clearance notch for avoiding the insert pin.

[0014] According to the injection molding die for deep cavity structure products of the present invention, a plurality of push plate frame guide rods are fixedly arranged on the movable mold plate; the push plate frame guide rods are movably connected to the movable mold, the core seat and the push plate frame in sequence.

[0015] According to the injection molding die for deep cavity structure products of the present invention, a guide hole is provided on the push plate frame, and a guide sleeve is installed in the guide hole and is slidably sleeved with the guide rod of the push plate frame.

[0016] According to the injection molding die for deep cavity structure products of the present invention, a positioning block is fixedly connected to the push plate frame, and a positioning groove cooperating with the positioning block is provided on the movable mold.

[0017] According to the injection molding mold for deep cavity structure products of the present invention, the movable mold is provided with a mold guide column that is slidably connected and engaged with the fixed mold.

[0018] In summary, the present invention provides a push plate frame to push the opening of the product to separate it from the core when the mold is opened, thereby reducing the pushing stroke, effectively simplifying the structure of the injection molding machine, and reducing the equipment manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention;

[0020] Figure 2 yes Figure 1 Schematic diagram of the structure of the middle moving mold;

[0021] Figure 3 yes Figure 2 A schematic diagram of a partial cross-section structure;

[0022] Figure 4 It is a structural schematic diagram of the push plate frame of the present invention;

[0023] Figure 5 It is a bottom-up structural schematic diagram of the fixed template of the present invention;

[0024] Figure 6 It is a bottom view structural schematic diagram of the fixed mold of the present invention;

[0025] In the figure: 1-movable mold, 11-movable mold plate, 12-mold guide column, 13-push plate frame guide rod, 14-limiting plate; 2-fixed mold, 21-fixed mold plate, 22-bump, 23-air vent, 24-through hole, 25-cavity; 3-push plate frame, 31-push rod, 32-positioning block, 33-step surface, 34-allowance notch, 35-guide hole, 36-molding surface; 4-core seat, 41-pin; 100-product. DETAILED DESCRIPTION

[0026] See also Figure 1 The present invention provides an injection molding mold for a deep cavity structure product, wherein the product 100 has a cavity, one end of which is an open structure and the other end is a bottom sealing structure; the product 100 includes a fixed mold 2 and a movable mold 1; the fixed mold 2 is fixed on a fixed mold plate 21, and the movable mold 1 is fixed on a movable mold plate 11;

[0027] See also Figure 2 and Figure 3 The movable mold 1 is provided with a mold cavity, a core holder 4 is fixed in the mold cavity, and a core for forming a cavity of the product 100 is fixed on the core holder 4;

[0028] Combination Figure 6 The fixed mold 2 is provided with a cavity 25 for cooperating with the core; after the mold is closed, the raw material is filled between the core and the cavity 25, and the product 100 is formed after cooling;

[0029] The mold cavity of the movable mold 1 is also provided with a push plate frame 3 which is annularly sleeved with the core; the inner ring wall of the push plate frame 3 fits with the outer wall of the core, and the outer ring wall fits with the side wall of the mold cavity of the movable mold 1; the positioning of the push plate frame 3 is achieved through the surface contact between the core and the mold cavity.

[0030] See also Figure 4 The inner ring wall of the push plate frame 3 has a step surface 33 and a molding surface 36 formed by retreating outward; the push plate frame 3 is also fixed with a push rod 31, and the push rod 31 slides through the core seat 4, the movable mold 1 and the movable mold plate 11 in sequence;

[0031] The inner ring wall of the push plate frame 3 is attached to the outer wall of the core, and the 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.

[0032] When the mold is opened, a thrust is applied to the push rod 31 to move the push plate frame 3 in the mold cavity along 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 can be driven by a cylinder or by a push rod provided by the injection molding machine.

[0033] The present invention is provided with a push plate frame 3, which pushes the opening structure of the product 100 to separate it from the core when the mold is opened, thereby reducing the pushing stroke, effectively simplifying the structure of the injection molding machine, and reducing the equipment manufacturing cost.

[0034] The invention is suitable for product parts with a cavity with a large depth-to-width ratio, such as containers with barrel-shaped or cup-shaped structures, such as liquid storage barrels, water storage cups, etc.

[0035] As an embodiment, a pin 41 is provided on the core; and a clearance notch 34 is provided on the inner ring wall of the push plate frame 3 for avoiding the pin 41 .

[0036] As an embodiment, the side wall of the cavity of the movable mold 1 is an inclined surface; the outer ring wall of the push plate frame 3 is adapted to the inclined surface. After the push plate frame 3 is pushed, its outer ring wall is out of contact with the side wall of the cavity, reducing the pushing resistance.

[0037] Furthermore, a limiting plate 14 is fixedly provided on the side wall of the mold cavity of the movable mold 1 to limit the pushing stroke of the push plate frame 3 .

[0038] As an embodiment, a plurality of push plate frame guide rods 13 are fixedly arranged on the movable mold plate 11; the push plate frame guide rods 13 are movably connected to the movable mold 1, the core seat 4 and the push plate frame 3 in sequence; the movement posture of the push plate frame 3 is stable and can be accurately reset.

[0039] Furthermore, a guide hole 35 is opened on the push plate frame 3, and a guide sleeve is installed in the guide hole 35, which is slidably sleeved with the push plate frame guide rod 13; the guide sleeve cooperates with the push plate frame guide rod 13, thereby reducing the wear of the push plate frame guide rod 13, extending the service life, and facilitating assembly.

[0040] As an embodiment, the push plate frame 3 is fixedly connected with a positioning block 32, and the movable mold 1 is provided with a positioning groove that cooperates 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.

[0041] As an embodiment, the movable mold 1 is provided with a mold guide column 12 which is slidably connected with the fixed mold 2.

[0042] As an embodiment, a protrusion 22 located in the cavity 25 is fixed on the fixed mold plate 21; the protrusion 22 is used to form the bottom structure of the product 100; a plurality of air outlet holes 23 are provided on the protrusion 22; when the mold is opened, gas is introduced through the air outlet holes 23 to separate the bottom structure of the product 100 from the protrusion 22, thereby reducing the adhesion between the product 100 and the protrusion 22, and preventing the bottom structure of the product 100 from being torn when the mold is opened.

[0043] Furthermore, a through hole 24 is formed on the fixed template 21 , an air supply pipe is disposed in the through hole 24 , and an air outlet end of the air supply pipe is connected to the air outlet hole 23 .

[0044] In summary, the present invention provides an injection molding mold for deep cavity structure products, which pushes the opening of the product to separate it from the core when the mold is opened by setting a push plate frame, thereby reducing the pushing stroke, effectively simplifying the structure of the injection molding machine, and reducing the equipment manufacturing cost.

[0045] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. An injection molding mold for a deep cavity structure product, the product having a cavity, one end of the cavity is an opening structure, and the other end is a bottom sealing structure; characterized in that: The molding die comprises a fixed die and a movable die; the fixed die is fixed on the fixed die plate, and the movable die is fixed on the movable die plate; The movable mold is provided with a mold cavity, a core seat is fixed in the mold cavity, and a core for forming a product cavity is fixed on the core seat; The mold cavity of the movable mold is also provided with a push plate frame which is annularly sleeved with the core; the inner ring wall of the push plate frame fits with the outer wall of the core; the inner ring wall of the push plate frame has a step surface and a molding surface; the push plate frame is also fixed with a push rod, which slides through the core seat, the movable mold and the movable mold plate in sequence.

2. The injection molding mold for deep cavity structure products according to claim 1, characterized in that: The fixed template is fixed with a convex block located in the mold cavity; the convex block is provided with a plurality of air outlet holes.

3. The injection molding die for deep cavity structure products according to claim 2, characterized in that: A through hole is provided on the fixed template, an air supply pipe is arranged in the through hole, and an air outlet end of the air supply pipe is connected to the air outlet hole.

4. The injection molding die for deep cavity structure products according to claim 1, characterized in that: The side wall of the movable mold cavity is an inclined surface; the outer ring wall of the push plate frame is adapted to the inclined surface.

5. The injection molding die for deep cavity structure products according to claim 1, characterized in that: A limiting plate is fixedly arranged on the side wall of the movable mold cavity.

6. The injection molding die for deep cavity structure products according to claim 1, characterized in that: The core is provided with an inlay pin; the inner ring wall of the push plate frame is provided with a clearance notch for avoiding the inlay pin.

7. The injection molding mold for deep cavity structure products according to claim 1, characterized in that: A plurality of push plate frame guide rods are fixedly arranged on the movable mold plate; the push plate frame guide rods are movably connected with the movable mold, the core seat and the push plate frame in sequence.

8. The injection molding die for deep cavity structure products according to claim 7, characterized in that: A guide hole is provided on the push plate frame, and a guide sleeve is installed in the guide hole and is slidably sleeved with the guide rod of the push plate frame.

9. The injection molding die for deep cavity structure products according to claim 1, characterized in that: A positioning block is fixedly connected to the push plate frame, and a positioning groove matched with the positioning block is provided on the movable mold.

10. The injection molding die for a deep cavity structure product according to any one of claims 1 to 9, characterized in that: The movable mold is provided with a mold guide column which is slidably connected and matched with the fixed mold.

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