Novel glue sealing mechanism for insert injection molding

Abstract

The utility model discloses a novel glue sealing mechanism for insert injection molding. The novel glue sealing mechanism comprises a fixed mold core and a movable mold core, a fixed mold side supporting block is arranged on the fixed mold core, and the fixed mold side supporting block extends downwards out of the lower surface of the fixed mold core; a product groove is formed in the movable mold core; a sliding groove is formed in the side edge of the product groove, and a glue sealing insert, a non-Newtonian fluid transition block and a glue sealing guide block are sequentially arranged in the sliding groove. During mold closing, the fixed mold side supporting block abuts against the glue sealing guide block, the glue sealing guide block drives the non-Newtonian fluid transition block and the glue sealing insert to slide towards the product groove side, and therefore the glue sealing insert abuts against a stamping part to be subjected to injection molding; the non-Newtonian fluid transition block is made of a D3O material. According to the utility model, the non-Newtonian fluid characteristic represented by the D3O material is utilized, so that the sealing mechanism structure has two different mechanical states: the soft state can be compatible with the size fluctuation of a stamping part, and the hard state can resist huge pressure from molten plastic, thereby avoiding the pressing damage and burrs of the stamping part.

Description

Technical Field

[0001] The utility model discloses a novel sealing mechanism for insert injection molding, and relates to the technical field of injection molding product processing. Background Art

[0002] During the injection molding process of stamping parts, the sealing area is prone to burrs, or the sealing area of ​​the stamping parts is crushed, affecting the appearance of the product. This is limited by the raw materials of the stamping parts themselves and the stamping molding accuracy. There must be certain dimensional fluctuations in the stamping parts molding production. When the stamping parts are placed in the injection mold to form the injection molded part structure, the fluctuation of the stamping parts will directly affect the sealing of the injection molded part. When the sealing area of ​​the stamping parts is a positive tolerance, it is easy to cause product crushing. When the sealing area of ​​the stamping parts is a negative tolerance, it is very easy to cause burrs. To solve these problems, companies need to spend a lot of manpower on secondary rework. Utility Model Content

[0003] The utility model aims at the defects in the above-mentioned background technology and provides a new type of sealing mechanism for insert injection molding to avoid the problems of crushing and burring of stamping parts.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is as follows: a new type of glue sealing mechanism for insert injection molding, including: a fixed mold core, a movable mold core, a fixed mold side support block, a glue sealing insert, a non-Newtonian fluid transition block and a glue sealing guide block;

[0005] A fixed mold side support block is arranged on the fixed mold core, and the fixed mold side support block extends downward out of the lower surface of the fixed mold core;

[0006] The movable mold core is provided with a product slot for placing the stamping parts to be injected;

[0007] A slide groove is arranged on the side of the product groove, and a sealing glue insert, a non-Newtonian fluid transition block and a sealing glue guide block are arranged in sequence in the slide groove. One side of the sealing glue guide block is in wedge contact with the fixed mold side support block. When the mold is closed, the fixed mold side support block presses the sealing glue guide block tightly, and the sealing glue guide block drives the non-Newtonian fluid transition block, the spring and the sealing glue insert to slide toward the product groove side, so that the sealing glue insert presses the stamping part to be injected;

[0008] The non-Newtonian fluid transition block is made of D3O material, which has non-Newtonian fluid properties. This material remains in a relaxed state under normal conditions, is soft and elastic, and once subjected to severe impact or extrusion, the molecules immediately lock with each other, quickly tighten and harden, and return to the initial relaxed state after the external force disappears.

[0009] Furthermore, the bottom of the other side of the sealing guide block extends horizontally toward the product groove side, the sealing insert and the non-Newtonian fluid transition block are arranged on the upper side of the bottom of the sealing guide block, and the sealing insert, the non-Newtonian fluid transition block and the top of the sealing guide block are maintained on the same horizontal line.

[0010] Furthermore, the product groove is connected to the slide groove, the product groove protrudes from the slide groove and is L-shaped, and the top of the sealing insert is L-shaped. When the mold is closed, the side of the injection stamping part contacts the top of the sealing insert.

[0011] Furthermore, the movable mold core has a transverse mounting groove on one side of the bottom of the slide groove, the bottom of the mounting groove is connected to one end of the first spring, the other end of the first spring is connected to the first bolt, the bolt body of the first bolt is connected to the horizontal extension of the sealing guide block, and the nut of the first bolt is clamped to the bottom of the sealing insert, which is used to push out the sealing insert, the non-Newtonian fluid transition block and the sealing guide block when opening the mold.

[0012] Furthermore, the fixed mold side support block adopts a strip block design, and the thickness of the fixed mold side support block is smaller than the width of the slide groove, which facilitates the fixed mold side support block to enter the slide groove and contact and connect with the sealing guide block.

[0013] Furthermore, a second spring is arranged between the sealing insert and the sealing guide block, and a transverse through hole is arranged on the non-Newtonian fluid transition block for placing the second spring, and the second spring is kept in a compressed state to give a pre-pressure to the sealing insert so that the sealing insert is in close contact with the stamping part in the initial state of injection molding.

[0014] Furthermore, a second bolt is arranged at the bottom of the side of the slide groove away from the product groove, and the nut of the second bolt protrudes from the bottom of the slide groove. When the mold is closed, the bottom end of the fixed mold side support block contacts the top surface of the nut. When the mold is opened, the sealing guide block is reset under the pressure of the first spring and contacts the side of the nut. The second bolt plays a limiting role.

[0015] Furthermore, a mounting hole which runs through the fixed mold core from top to bottom is provided on the fixed mold core, and the fixed mold side support block is inserted into the fixed mold core through the mounting hole.

[0016] Working principle: When the mold is closed for injection molding, the sealing block is pushed to overcome the spring force and close to the stamping part. When the plastic filled by injection molding reaches the sealing block, D3O solidifies quickly to offset the residual pressure from the mold cavity, and then returns to a relaxed state to cooperate with the next new state of stamping parts.

[0017] Beneficial effect: The utility model utilizes the non-Newtonian fluid characteristics of the D3O material, so that the state of the sealing mechanism presents two different mechanical states: hard and soft; the soft state can be compatible with the size fluctuation of the stamped parts, and the hard state can resist the huge pressure from the molten plastic, ultimately avoiding the crushing and burrs of the stamped parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional partial schematic diagram of the mold of the utility model;

[0019] Figure 2 It is an exploded schematic diagram of the internal partial structure of the utility model;

[0020] Figure 3 It is an internal cross-sectional view of the mold of the utility model when the mold is closed;

[0021] Figure 4 This is an internal cross-sectional view of the mold of the utility model when the mold is opened. DETAILED DESCRIPTION

[0022] The following is a further detailed description of the implementation of the technical solution in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and cannot be used to limit the protection scope of the utility model.

[0023] like Figures 1 to 4 As shown, a new type of sealing mechanism for insert injection molding is characterized by comprising: a fixed mold core 1, a movable mold core 3, a fixed mold side support block 4, a sealing insert block 6, a non-Newtonian fluid transition block 9 and a sealing guide block 10;

[0024] The fixed mold core 1 is provided with a fixed mold side support block 4, and the fixed mold side support block 4 extends downward from the lower surface of the fixed mold core 1, and a mounting hole penetrating from top to bottom is provided on the fixed mold core 1, and the fixed mold side support block 4 is inserted into the fixed mold core 1 through the mounting hole;

[0025] The movable mold core 3 is provided with a product slot for placing the stamping part 2 to be injected;

[0026] A slide groove is arranged on the side of the product groove, and a sealing glue insert 6, a non-Newtonian fluid transition block 9 and a sealing glue guide block 10 are arranged in sequence in the slide groove. One side of the sealing glue guide block 10 is in wedge contact with the fixed mold side support block 4. When the mold is closed, the fixed mold side support block 4 presses the sealing glue guide block 10, and the sealing glue guide block 10 drives the non-Newtonian fluid transition block 9 and the sealing glue insert 6 to slide toward the product groove side, so that the sealing glue insert 6 presses the stamping part 2 to be injected;

[0027] The non-Newtonian fluid transition block 9 is made of D3O material.

[0028] The bottom of the other side of the sealing guide block 10 extends horizontally toward the product groove side, and the sealing insert 6 and the non-Newtonian fluid transition block 9 are arranged on the upper side of the bottom of the sealing guide block 10, and the sealing insert 6, the non-Newtonian fluid transition block 9 and the top of the sealing guide block 10 are maintained on the same horizontal line.

[0029] The product groove is connected to the slide groove, the product groove protrudes from the slide groove and is L-shaped, the top of the sealing block 6 is L-shaped, and when the mold is closed, the side of the injection molded stamping part 2 is in contact with the top of the sealing block 6, and the top of the sealing block 6 is adapted to the side of the injection molded stamping part 2.

[0030] The movable mold core opens a transverse mounting groove on one side of the bottom of the slide groove, the bottom of the mounting groove is connected to one end of the first spring 5, the other end of the first spring 5 is connected to the first bolt 8, the bolt body of the first bolt 8 is connected to the horizontal extension of the sealing guide block 10, and the nut of the first bolt 8 is clamped to the bottom of the sealing insert 6.

[0031] The fixed mold side support block 4 is designed as a strip block, and the thickness of the fixed mold side support block 4 is smaller than the width of the slide groove.

[0032] A second spring 7 is arranged between the sealing glue insert 6 and the sealing glue guide block 10, and a transverse through hole is arranged on the non-Newtonian fluid transition block 9 for accommodating the second spring 7, and the second spring 7 is kept in a compressed state.

[0033] A second bolt 11 is arranged at the bottom of the side of the slide away from the product groove, and the nut of the second bolt 11 protrudes from the bottom of the slide groove. When the mold is closed, the bottom end of the fixed mold side support block 4 contacts the top surface of the nut, and when the mold is opened, the side of the sealing guide block 10 contacts the side of the nut.

[0034] Working process: first place the stamping part 2 to be injected into the product slot, and accurately position and fix the stamping part in the mold cavity by relying on the positioning features in the mold;

[0035] When closing the mold, the fixed mold side support block 4 is in wedge contact with the sealing guide block 10, pushing the product groove side to press the sealing guide block 10, and the sealing guide block 10 drives the non-Newtonian fluid transition block 9, the spring 7 and the sealing insert 6 to slide toward the product groove side, and the stamping parts are attached to the compression force of the spring 7, waiting for injection molding;

[0036] During the injection molding process, since the injection time is very short, the pressure of the molten plastic instantly pushes the sealing insert 6. At this time, the non-Newtonian fluid transition block 9 is suddenly stressed and quickly tightens and hardens, forming a rigid connection with the fixed mold side support block 4 to prevent the molten plastic from overflowing the mold cavity and causing burrs.

[0037] When the mold is opened, the fixed mold support block 4 retreats as the mold is opened, and the sealing guide block 10, the non-Newtonian fluid transition block 9, the spring 7 and the sealing insert 6 retreat and separate from the product under the thrust of the spring 5, so as to facilitate the removal of the molded product and wait for the placement of the stamping parts to be injected next week;

[0038] The above-mentioned work is cycled and the sealing work is repeated.

[0039] The utility model utilizes the non-Newtonian fluid characteristics of the D3O material, so that the state of the sealing mechanism presents two different mechanical states: hard and soft; the soft state can accommodate the size fluctuation of the stamped parts, and the hard state can resist the huge pressure from the molten plastic, ultimately avoiding the crushing and burrs of the stamped parts.

[0040] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A new type of sealing mechanism for insert injection molding, characterized in that: include: A fixed mold core (1), a movable mold core (3), a fixed mold side support block (4), a sealing insert (6), a non-Newtonian fluid transition block (9) and a sealing guide block (10); A fixed mold side support block (4) is provided on the fixed mold core (1), and the fixed mold side support block (4) extends downwards out of the lower surface of the fixed mold core (1); The movable mold core is provided with a product slot for placing the stamping parts (2) to be injected; A slide groove is arranged on the side of the product groove, and a sealing glue insert (6), a non-Newtonian fluid transition block (9) and a sealing glue guide block (10) are arranged in sequence in the slide groove. One side of the sealing glue guide block (10) is in wedge-shaped contact with the fixed mold side support block (4). When the mold is closed, the fixed mold side support block (4) presses against the sealing glue guide block (10), and the sealing glue guide block (10) drives the non-Newtonian fluid transition block (9), the spring (7) and the sealing glue insert (6) to slide toward the product groove side, so that the sealing glue insert (6) presses against the stamping part (2) to be injected.

2. According to claim 1, the new type of sealant mechanism for insert injection molding is characterized in that: The bottom of the other side of the sealing guide block (10) extends horizontally toward the product groove side, and the sealing insert (6) and the non-Newtonian fluid transition block (9) are arranged on the upper side of the bottom of the sealing guide block (10), and the sealing insert (6), the non-Newtonian fluid transition block (9) and the top of the sealing guide block (10) are maintained on the same horizontal line.

3. According to claim 2, the new type of sealant mechanism for insert injection molding is characterized in that: The product groove is connected to the slide groove, the product groove protrudes from the slide groove and is arranged in an L shape, the top of the sealing block (6) is arranged in an L shape, and when the mold is closed, the side of the injection stamping part (2) contacts the top of the sealing block (6).

4. The new type of sealant mechanism for insert injection molding according to claim 2 is characterized in that: The movable mold core is provided with a transverse mounting groove on one side of the bottom of the slide groove, the bottom of the mounting groove is connected to one end of a first spring (5), the other end of the first spring (5) is connected to a first bolt (8), the bolt body of the first bolt (8) is connected to a horizontal extension of the sealing guide block (10), and the nut of the first bolt (8) is clamped to the bottom of the sealing insert (6).

5. The new type of sealant mechanism for insert injection molding according to claim 2 is characterized in that: The fixed die side support block (4) adopts a strip block design, and the thickness of the fixed die side support block (4) is smaller than the width of the slide groove.

6. The new type of sealant mechanism for insert injection molding according to claim 1 is characterized in that: A second spring (7) is arranged between the sealing glue insert (6) and the sealing glue guide block (10), and a transverse through hole is arranged on the non-Newtonian fluid transition block (9) for accommodating the second spring (7), and the second spring (7) is kept in a compressed state.

7. The new type of sealant mechanism for insert injection molding according to claim 2 is characterized in that: A second bolt (11) is arranged at the bottom of the side of the slide groove away from the product groove, and the nut of the second bolt (11) protrudes from the bottom of the slide groove. When the mold is closed, the bottom end of the fixed mold side support block (4) contacts the top surface of the nut. When the mold is opened, the sealing guide block (10) contacts the side of the nut under the pressure of the first spring (5).

8. The new type of sealant mechanism for insert injection molding according to claim 1 is characterized in that: The fixed mold core (1) is provided with a mounting hole extending therethrough, and the fixed mold side support block (4) is inserted into the fixed mold core (1) through the mounting hole; 9. The new type of sealant mechanism for insert injection molding according to claim 1, characterized in that: The non-Newtonian fluid transition block (9) is made of D3O material.

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