A two-color injection mold

Abstract

The application relates to a double-color injection mold, and relates to the field of molds. In order to solve the problem that liquid needs to be shaken to discharge internal gas after being injected into the mold, but the injected liquid has the possibility of splashing during the shaking process, and the problem is to be improved, the injection mold comprises an upper mold and a lower mold, the upper mold is closed with the lower mold to form an injection cavity, an injection port is arranged on the upper mold, a closing block is rotationally connected to the upper mold through a shaft rod, the closing block can block the injection port, and a gas outlet is arranged on the closing block; a driving assembly is further arranged on the upper mold to drive the closing block to rotate so that the injection port is exposed. The application has the effect of reducing the splashing of liquid during the shaking process of the mold.

Description

Technical Field

[0001] This application relates to the field of molds, and in particular to a two-color injection mold. Background Technology

[0002] Injection molding, also known as injection molding, is a molding method that combines injection and molding. The advantages of injection molding include high production speed and efficiency, automated operation, a wide variety of designs and shapes (from simple to complex), and sizes ranging from large to small. It also produces dimensionally accurate products, facilitates product updates and replacements, and can create complex shapes. Injection molding is suitable for mass production and molding processes involving complex shapes.

[0003] After the liquid is injected into the mold, it needs to be vibrated to expel the internal gas. However, during the vibration process, the injected liquid may splash out, so this needs to be improved. Summary of the Invention

[0004] To reduce liquid splashing during mold vibration, this application provides a two-color injection mold.

[0005] This application provides a two-color injection mold with the following technical solution:

[0006] A two-color injection mold includes an upper mold and a lower mold. The upper mold and the lower mold are closed to form an injection cavity. An injection port is provided on the upper mold. A sealing block is rotatably connected to the upper mold via a shaft. The sealing block can block the injection port. An air vent is provided on the sealing block. The upper mold is also provided with a driving assembly to drive the sealing block to rotate and expose the injection port.

[0007] By adopting the above technical solution, when the mold needs to be used, the drive component is activated, which causes the sealing block to rotate. After the sealing block rotates, the injection port is exposed, and the slurry is injected into the injection cavity. After the injection cavity is filled, the drive component drives the sealing block to rotate, and the sealing block seals the injection port. The mold is vibrated by auxiliary equipment, which causes air to be discharged from the injection cavity. The discharged air is discharged through the air outlet and the sealing block. The sealing block seals the injection port, reducing the occurrence of slurry splashing out of the mold during the vibration process.

[0008] Optionally, the bottom wall of the sealing block has a sealing groove, and a sealing block is disposed in the sealing groove. The bottom wall of the sealing block is an arc-shaped surface. The sealing block can be inserted into the injection port. A reciprocating assembly for controlling the movement of the sealing block is disposed in the sealing groove. The reciprocating assembly and the sealing block can be completely inserted into the sealing groove. The vent hole includes a first section hole and a second section hole. The first section hole is opened on the sealing block and communicates with the sealing groove. The second section hole is opened on the sealing block and communicates with the sealing groove.

[0009] By adopting the above technical solution, the slurry is injected into the injection cavity. After the injection cavity is filled, the drive component drives the sealing block to rotate. The sealing block seals the injection port. When the sealing groove is above the injection port, the reciprocating component drives the sealing block to move downward, and the sealing block is partially inserted into the injection port. At this time, the auxiliary equipment is used to vibrate the mold, allowing air to be discharged from the injection cavity. The discharged air is discharged through the first and second holes and the sealing block. By using the insert-type sealing block, the slurry splashing into the gap between the sealing block and the top wall of the upper mold during the vibration process is reduced. After the slurry in the gap is formed, a gap exists between the sealing block and the top wall of the upper mold, which leads to a decrease in the sealing effect.

[0010] Optionally, the first segment hole is provided in multiple ways, and the multiple first segment holes are opened along the circumference of the sealing block.

[0011] By adopting the above technical solution, since the end wall of the sealing block near the injection port is an arc-shaped surface, the discharged air can easily move upward along the arc-shaped surface. The first section of holes set in the circumference can allow the air to be discharged smoothly, thereby improving the air discharge efficiency and discharge rate.

[0012] Optionally, the outer edge of the sealing block is provided with a limiting piece, which can be placed on the top wall of the upper mold, and the outer edge of the limiting piece is in contact with the inner side wall of the sealing groove.

[0013] By adopting the above technical solution, the setting of the limiting piece fixes the depth of the sealing block inserted into the injection port, thereby fixing the distance between the sealing block and the preset slurry height, reducing the occurrence of contact between the sealing block and the slurry.

[0014] Optionally, the reciprocating assembly includes a reciprocating rod and a reciprocating spring. The bottom of the closed groove is provided with a reciprocating groove. One end of the reciprocating spring is connected to the bottom of the reciprocating groove, and the other end is connected to the sealing block. One end of the reciprocating rod is connected to the sealing block, and the reciprocating spring is sleeved on the reciprocating rod.

[0015] By adopting the above technical solution, when the sealing groove is located directly above the injection port, the sealing block is inserted into the injection port under the action of gravity. When the limiting plate is in contact with the top wall of the upper mold, the sealing block stops moving. At this time, the edge of the arc surface of the sealing block is flush with the injection port, and the end of the reciprocating rod away from the sealing block is located in the reciprocating groove. When it is necessary to expose the injection port, the drive component drives the sealing block to rotate. At this time, under the guidance of the arc surface, the sealing block is dislodged from the injection port, and the sealing block moves upward with the limiting plate until it is fully inserted into the sealing groove.

[0016] Optionally, the length of the reciprocating rod is greater than the depth of the closed groove.

[0017] By adopting the above technical solution, when the sealing block is inserted to the specified depth in the injection port, the end of the reciprocating rod away from the sealing block is still inserted in the reciprocating groove, making it difficult for the reciprocating rod to come out of the reciprocating groove, thus reducing the occurrence of collisions when the reciprocating rod is reinserted into the reciprocating groove after it has come out of the reciprocating groove.

[0018] Optionally, the upper mold is also provided with a protective block, and a protective through groove is provided on the side wall of the protective block near the injection port. A protective strip is provided on the outer edge side wall of the closed block, and the protective strip can be inserted into the protective through groove.

[0019] By adopting the above technical solution, during the process of the drive component moving the sealing block to close the injection port, the protective strip gradually approaches the protective through groove. When the protective strip is fully inserted into the protective through groove, the sealing block completes its rotation. At this time, the top wall of the protective through groove limits the protective strip, thereby restricting the sealing block and further reducing the occurrence of collisions between the sealing block and the shaft end during vibration.

[0020] Optionally, the driving assembly includes a driving motor, a driving gear, and a driven gear. The upper mold has a driving groove, the driving motor is embedded in the driving groove, the driving shaft of the driving motor is connected to the driving gear, the outer edge sidewall of the closed block has a driven groove, the driven gear is inserted into the driven groove and connected to the inner sidewall of the driven groove, and the driven gear is connected to the driving gear.

[0021] By adopting the above technical solution, when it is necessary to adjust the position of the sealing block, the drive motor is started, the drive motor drives the drive gear to rotate, the drive gear drives the driven gear to rotate, and the driven gear drives the sealing block to rotate, so as to realize the sealing block to unseal or block the injection port; the drive motor drives the sealing block to rotate, which has high stability, and at the same time, it is electrically connected to the machine that injects slurry, which can realize semi-automatic operation.

[0022] Optionally, the bottom wall of the closed block is provided with a shock-absorbing groove, and a shock-absorbing spring is provided in the shock-absorbing groove. The shock-absorbing spring is sleeved on the shaft, and the thickness of the driving gear is greater than the thickness of the driven gear.

[0023] By adopting the above technical solution, when the bottom wall of the closing block is in contact with the top wall of the upper mold, the shock-absorbing spring is in a normal state; once the auxiliary equipment vibrates the mold, the closing block is easily moved relative to the upper mold because it is movably connected to the shaft, which causes a collision with the end of the shaft. The shock-absorbing spring reduces the collision of the closing block with the end of the shaft during the vibration process.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. When the mold needs to be used, the drive assembly is activated, causing the sealing block to rotate. After the sealing block rotates, the injection port is exposed, and the slurry is injected into the injection cavity. After the injection cavity is filled, the drive assembly drives the sealing block to rotate, and the sealing block seals the injection port. An auxiliary device is used to vibrate the mold, causing air to be discharged from the injection cavity. The discharged air is discharged through the air vent and the sealing block. The sealing block seals the injection port, reducing the occurrence of slurry splashing out of the mold during the vibration process.

[0026] 2. When the sealing groove is directly above the injection port, the sealing block is inserted into the injection port under the action of gravity. When the limiting plate is in contact with the top wall of the upper mold, the sealing block stops moving. At this time, the edge of the arc surface of the sealing block is flush with the injection port, and the end of the reciprocating rod away from the sealing block is located in the reciprocating groove. When it is necessary to expose the injection port, the drive assembly drives the sealing block to rotate. At this time, under the guidance of the arc surface, the sealing block is dislodged from the injection port. The sealing block moves upward with the limiting plate until it is fully inserted into the sealing groove.

[0027] 3. When the bottom wall of the closing block is in contact with the top wall of the upper mold, the damping spring is in its normal state; once the auxiliary equipment vibrates the mold, the closing block is easily moved relative to the upper mold because it is movably connected to the shaft, which causes a collision with the end of the shaft. The damping spring reduces the collision of the closing block with the end of the shaft during the vibration. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of one of the closed blocks hidden in an embodiment of this application.

[0029] Figure 2 This is a cross-sectional schematic diagram illustrating the positional relationship between the sealing block and the injection port in an embodiment of this application.

[0030] Explanation of reference numerals in the attached drawings: 1. Upper mold; 11. Injection port; 12. Protective block; 121. Protective through groove; 13. Drive groove; 2. Lower mold; 3. Sealing block; 31. Shaft; 32. Sealing groove; 321. Limiting piece; 322. Reciprocating groove; 33. Sealing block; 331. Arc-shaped surface; 34. Reciprocating assembly; 341. Reciprocating rod; 342. Reciprocating spring; 35. Protective strip; 36. Driven groove; 37. Shock-absorbing groove; 371. Shock-absorbing spring; 4. Vent hole; 41. First section hole; 42. Second section hole; 5. Drive assembly; 51. Drive motor; 52. Drive gear; 53. Driven gear. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0032] This application discloses a two-color injection mold. (Refer to...) Figure 1The two-color injection mold includes an upper mold 1 and a lower mold 2. The upper mold 1 has an injection port 11. The upper mold 1 is first placed on the lower mold 2 to form an injection cavity. The slurry is injected from the injection port 11 to fill the injection cavity. After the slurry in the injection cavity is formed, the upper mold 1 is moved up to expose the finished product in the injection cavity and the final demolding is performed.

[0033] Reference Figure 2 The top wall of the upper mold 1 is rotatably connected to a closing block 3 via a shaft 31. The top wall of the upper mold 1 is provided with a driving assembly 5, which is connected to the closing block 3.

[0034] The injection port 11 is exposed, and the slurry is injected into the injection cavity. After the injection cavity is filled, the drive component 5 drives the sealing block 3 to rotate. The sealing block 3 blocks the injection port 11. The mold is vibrated by auxiliary equipment to allow air to be discharged from the injection cavity. The discharged air is discharged through the sealing block 3. The sealing block 3 blocks the injection port 11 to reduce the occurrence of slurry splashing out of the mold during the vibration process.

[0035] Reference Figure 2 The drive assembly 5 includes a drive motor 51. A drive groove 13 is provided on the top wall of the upper mold 1. The body of the drive motor 51 is completely embedded in the drive groove 13. The drive shaft of the drive motor 51 is exposed on the top of the upper mold 1. A drive gear 52 is fixed on the drive shaft of the drive motor 51 by snap-fit.

[0036] Reference Figure 2 A driven gear 53 meshes with the drive gear 52. A driven groove 36 is provided on the side wall of the closed block 3 near the shaft 31. A part of the driven gear 53 is inserted into the driven groove 36, and the driven gear 53 is sleeved on the shaft 31 of the closed block 3 and fixedly connected to the inner side wall of the driven groove 36. At this time, the axis of the shaft 31 and the axis of the driven gear 53 are collinear.

[0037] When the position of the sealing block 3 needs to be adjusted, the drive motor 51 is started. The drive motor 51 drives the drive gear 52 to rotate, the drive gear 52 drives the driven gear 53 to rotate, and the driven gear 53 drives the sealing block 3 to rotate, so as to realize the sealing block 3 to unseal or seal the injection port 11.

[0038] Reference Figure 2The bottom wall of the closed block 3 is provided with a shock-absorbing groove 37, and the shaft 31 is set through the shock-absorbing groove 37. A shock-absorbing spring 371 is placed in the shock-absorbing groove 37 and is sleeved on the shaft 31. One end of the shock-absorbing spring 371 abuts against the bottom of the shock-absorbing groove 37, and the other end abuts against the bottom wall of the upper mold 1. When the bottom wall of the closed block 3 is in contact with the top wall of the upper mold 1, the shock-absorbing spring 371 is in the normal state. Once the auxiliary equipment vibrates the mold, the closed block 3 is easily moved relative to the upper mold 1 because it is movably connected to the shaft 31, which may cause a collision with the end of the shaft 31. The shock-absorbing spring 371 reduces the collision of the closed block 3 with the end of the shaft 31 during the vibration.

[0039] Reference Figure 2 The top wall of the upper mold 1 is also integrally formed with a protective block 12. The side wall of the protective block 12 near the injection port 11 is provided with a protective through groove 121. The protective through groove 121 is connected to the side wall of the protective block 12 in the direction perpendicular to the injection port 11. The sealing block 3 is integrally formed with a protective strip 35. During the rotation of the sealing block 3, the protective strip 35 gradually moves closer to the protective block 12 and eventually fully inserts into the protective through groove 121. At this time, the top wall of the protective through groove 121 limits the protective strip 35, thereby restricting the sealing block 3 and further reducing the collision of the sealing block 3 with the end of the shaft 31 during the vibration process, thus strengthening the stability of the sealing block 3.

[0040] Reference Figure 2 The bottom wall of the sealing block 3 is provided with a sealing groove 32, which is located directly above the injection port 11. A sealing block 33 is slidably disposed in the sealing groove 32. The sealing block 33 is slidably disposed in the sealing groove 32 along the depth of the sealing groove 32, and there is a gap between the side wall of the sealing block 33 and the inner side wall of the sealing groove 32. The sealing block 33 can be inserted into the injection port 11 to seal the injection port 11.

[0041] Reference Figure 2 The bottom wall of the sealing block 33 is an arc-shaped surface 331, and the sealing block 3 is provided with an air outlet 4. The air outlet 4 includes a first section hole 41 and a second section hole 42. The first section hole 41 is opened on the sealing block 33, and multiple first section holes 41 are provided. The multiple first section holes 41 are opened along the circumference of the sealing block 33, and the first section holes 41 are provided through the sealing block 33 so that the injection port 11 is connected to the sealing groove 32. The second section hole 42 is opened on the sealing block 3 and communicates with the sealing groove 32. The first section hole 41 and the second section hole 42 cooperate to connect the injection cavity, the sealing groove 32 and the outside air.

[0042] Reference Figure 2A reciprocating assembly 34 is provided between the bottom of the sealing groove 32 and the sealing block 33. The reciprocating assembly 34 includes a reciprocating rod 341 and a reciprocating spring 342. A reciprocating groove 322 is opened at the bottom of the sealing groove 32. One end of the reciprocating rod 341 is inserted into the reciprocating groove 322, and the other end is connected to the sealing block 33. The length of the reciprocating rod 341 is greater than the depth of the sealing groove 32. The reciprocating spring 342 is sleeved on the reciprocating rod 341. One end of the reciprocating spring 342 is connected to the bottom of the reciprocating groove 322, and the other end is connected to the sealing block 33.

[0043] Reference Figure 2 The outer edge sidewall of the sealing block 33 is integrally formed with a limiting piece 321. The limiting piece 321 can be mounted on the top wall of the upper mold 1, and the limiting piece 321 can move along the depth direction of the sealing groove 32. At the same time, the outer edge sidewall of the limiting piece 321 is attached to the inner sidewall of the sealing groove 32.

[0044] Under the action of gravity, the sealing block 33 is inserted into the injection port 11. When the limiting piece 321 is in contact with the top wall of the upper mold 1, the sealing block 33 stops moving. At this time, the edge of the arc surface 331 of the sealing block 33 is flush with the injection port 11, and the end of the reciprocating rod 341 away from the sealing block 33 is located in the reciprocating groove 322.

[0045] The implementation principle of a two-color injection mold in this application embodiment is as follows: the drive motor 51 is started, the drive motor 51 drives the drive gear 52 to rotate, the drive gear 52 drives the driven gear 53 to rotate, the driven gear 53 drives the sealing block 3 to rotate. At this time, under the guidance of the arc surface 331, the sealing block 33 is dislodged from the injection port 11, and the sealing block 33 moves upward with the limiting piece 321 until it is completely inserted into the sealing groove 32. At the same time, the protective strip 35 is dislodged from the protective through groove 121, the injection port 11 is exposed, and the slurry begins to be injected.

[0046] After the slurry is injected, the drive motor 51 is started again, the sealing block 3 rotates, and the protective strip 35 moves toward the protective through groove 121. When the protective strip 35 is fully inserted into the protective through groove 121, the sealing block 3 stops rotating. At this time, the sealing groove 32 is located directly above the injection port 11. The sealing block 33 is inserted into the injection port 11 under the action of gravity. When the limiting piece 321 is in contact with the top wall of the upper mold 1, the sealing block 33 stops descending.

[0047] At this time, the mold is vibrated and degassed by auxiliary equipment. The air that is vibrated out is discharged through the first hole 41 and the second hole 42. The injection port 11 is sealed by the sealing block 3 to reduce the splashing of slurry during the vibration process.

[0048] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A two-color injection mold comprising an upper mold (1) and a lower mold (2), the upper mold (1) and the lower mold (2) being closed to form an injection cavity, the upper mold (1) being provided with an injection port (11), characterized in that: The upper mold (1) is rotatably connected with a closing block (3) through a shaft (31), the closing block (3) can block the injection port (11), and the closing block (3) is provided with an air outlet hole (4); the upper mold (1) is also provided with a driving assembly (5) to drive the closing block (3) to rotate to expose the injection port (11); the bottom wall of the closing block (3) is provided with a closing groove (32), the closing groove (32) is provided with a blocking block (33), the bottom wall of the blocking block (33) is an arc surface (331), the blocking block (33) can be inserted into the injection port (11), and the closing groove (32) is provided with a reciprocating assembly (34) for controlling the movement of the blocking block (33), and the reciprocating assembly (34) and the blocking block (33) can be completely inserted into the closing groove (32); the air outlet hole (4) comprises a first hole (41) and a second hole (42), the first hole (41) is arranged on the blocking block (33) and communicates with the closing groove (32), and the second hole (42) is arranged on the closing block (3) and communicates with the closing groove (32); the outer edge side wall of the blocking block (33) is provided with a limiting piece (321), the limiting piece (321) can be arranged on the top wall of the upper mold (1), and the outer edge side wall of the limiting piece (321) is attached to the inner side wall of the closing groove (32); a plurality of first holes (41) are arranged on the blocking block (33) and arranged along the circumference of the blocking block (33), and the gas moves upward along the arc surface (331) of the bottom wall of the blocking block (33) to discharge the gas from the first hole (41).

2. A two-color injection mold according to claim 1, characterized in that: The reciprocating assembly (34) comprises a reciprocating rod (341) and a reciprocating spring (342), the bottom of the closing groove (32) is provided with a reciprocating groove (322), one end of the reciprocating spring (342) is connected with the bottom of the reciprocating groove (322), the other end is connected with the blocking block (33), one end of the reciprocating rod (341) is connected with the blocking block (33), and the reciprocating spring (342) is sleeved on the reciprocating rod (341).

3. A two-shot injection mold according to claim 2, wherein: The length of the reciprocating rod (341) is greater than the depth of the closing groove (32).

4. The dual color injection mold of claim 1, wherein: The upper mold (1) is also provided with a protection block (12), the side wall of the protection block (12) close to the direction of the injection port (11) is provided with a protection through groove (121), and the outer edge side wall of the closing block (3) is provided with a protection strip (35), which can be inserted into the protection through groove (121).

5. The dual color injection mold of claim 1, wherein: The driving assembly (5) comprises a driving motor (51), a driving gear (52) and a driven gear (53), the upper mold (1) is provided with a driving groove, the driving motor (51) is embedded in the driving groove, the driving shaft of the driving motor (51) is connected with the driving gear (52), the outer edge side wall of the closing block (3) is provided with a driven groove (36), the driven gear (53) is inserted into the driven groove (36) and connected with the inner side wall of the driven groove (36), and the driven gear (53) is connected with the driving gear (52).

6. A two-shot injection mold according to claim 5, wherein: The bottom wall of the closing block (3) is provided with a damping groove (37), a damping spring (371) is arranged in the damping groove (37), the damping spring (371) is sleeved on the shaft rod (31), and the thickness of the driving gear (52) is greater than the thickness of the driven gear (53).

Images