Male die assembly

Abstract

The invention relates to a male die assembly which comprises a push plate assembly and a die core plate assembly. The push plate assembly comprises a push sleeve and a push plate, and the push sleeve is connected with the push plate; an air inlet structure is arranged in the push plate assembly; the mold core plate assembly comprises a mold core and a mold core plate, the mold core is installed on the mold core plate, and the top of the mold core is a forming part used for forming a bottle cap. In a forming state, the push sleeve sleeves the outer wall of the mold core, a gas transmission structure is formed between the inner wall of the push sleeve and the middle outer wall of the mold core, the gas inlet structure is communicated with the gas transmission structure, the top of the inner wall of the push sleeve is in sealing fit with the middle outer wall of the mold core, and the top end of the gas transmission structure is isolated from the forming part; and in a demolding state, the top of the inner wall of the push sleeve and the middle outer wall of the mold core are unsealed, so that the top end of the gas transmission structure communicates with the forming part. The air blowing path of the male die assembly is arranged between the push sleeve and the die core, so that the die core is provided with the space for arranging the cooling channel, the situation of series flow between a cooling medium and gas is avoided, and the invention belongs to the technical field of cap injection dies.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cover injection mold, in particular to a male die assembly. BACKGROUND

[0002] After the bottle cap is injection molded, the bottle cap needs to be ejected from the mold. The existing cover injection mold includes an inner core, the inner core is provided with an air inlet hole, the inner core is provided with an air channel communicated with the air inlet hole, an air outlet hole is arranged between the end of the inner core and the insert, and the air outlet hole is communicated with the air channel. When the mold is ejected, high-pressure gas enters from the air inlet hole, and then passes through the air channel, the air outlet hole, the air outlet groove and the air outlet gap to top the inner side of the bottle cap product.

[0003] In the above-mentioned cover injection mold, since the blowing path is arranged on the inner core, the molded bottle cap can be blown out of the mold, but the inner core needs to be provided with a cooling medium channel to cool the bottle cap. The two are arranged in the inner core at the same time, which causes the inner core to be difficult to process, and the cooling medium and the gas are prone to flow between each other. SUMMARY

[0004] In view of the technical problems existing in the prior art, the purpose of the present application is to provide a male die assembly, by arranging the blowing path between the push sleeve and the mold core, so that the mold core has space to arrange the cooling channel, avoiding the flow between the cooling medium and the gas.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme: A male die assembly, comprising a push plate assembly and a mold core plate assembly; The push plate assembly comprises a push sleeve and a push plate, and the push sleeve and the push plate are connected to move with the push plate; The push plate assembly is provided with an air inlet structure for introducing gas from the outside; The mold core plate assembly comprises a mold core and a mold core plate, the bottom of the mold core is installed in the mold core plate, and the top of the mold core is a molding part for molding the bottle cap; In the molding state, the push sleeve is sleeved on the middle outer wall of the mold core, the inner wall of the push sleeve and the middle outer wall of the mold core form a gas conveying structure, the air inlet structure is communicated with the bottom end of the gas conveying structure, and the inner wall of the push sleeve is in sealing cooperation with the top of the middle outer wall of the mold core, so as to isolate the top end of the gas conveying structure from the molding part; In the ejection state, the inner wall top of the push sleeve and the middle outer wall of the mold core are unsealed, so that the top end of the gas conveying structure is communicated with the molding part.

[0006] As a preferred, the air inlet structure includes an air inlet channel and an air inlet channel, the air inlet channel is arranged in the push plate and used for introducing gas from the outside, the air inlet channel penetrates the side wall of the push sleeve, and the air inlet channel is communicated with the air inlet channel and provided with a sealing structure around the communication position.

[0007] As a kind of preference, the air inlet structure further includes an air inlet groove; The inner part of the push plate is provided with a mounting hole, and the push sleeve is mounted into the mounting hole. The air inlet groove is circumferentially arranged on the inner wall of the mounting hole, the air inlet of the air inlet channel extends into the air inlet groove, and the air inlet groove and the outer wall of the push sleeve form an air inlet space, and the air inlet channel inlet of the air inlet channel is communicated with the air inlet space. Alternatively, the air inlet groove is circumferentially arranged on the outer wall of the push sleeve, the air inlet channel inlet of the air inlet channel extends into the air inlet groove, and the air inlet groove and the inner wall of the mounting hole form an air inlet space, and the air inlet of the air inlet channel is communicated with the air inlet space.

[0008] As a kind of preference, the mounting hole is a stepped hole, the stepped hole includes an upper stepped hole and a lower stepped hole, and the outer wall of the push sleeve is provided with a circumferentially arranged positioning protrusion, which divides the outer wall of the push sleeve into a bottom section and a top section. The upper stepped hole penetrates to the top surface of the push plate and is matched with the positioning protrusion, and the lower stepped hole penetrates to the bottom surface of the push plate and is matched with the bottom section. The bottom section is inserted into the lower stepped hole until the positioning protrusion is matched with the upper stepped hole to limit the installation. When the inner wall of the mounting hole is provided with an air inlet or an air inlet groove and / or a sealing structure, the air inlet or the air inlet groove and / or the sealing structure is arranged on the inner wall of the lower stepped hole.

[0009] As a kind of preference, in the molding state, the gas conveying structure includes a gas conveying channel and a gas storage space arranged between the inner wall of the push sleeve and the middle outer wall of the mold core, the air inlet structure is communicated with the bottom end of the gas conveying channel, the top end of the gas conveying channel is communicated with the gas storage space, and the gas storage space is isolated from the molding part. In the demolding state, the gas conveying structure further includes a gas blowing channel formed between the top of the inner wall of the push sleeve and the middle outer wall of the mold core, and the gas storage space is communicated with the molding part through the gas blowing channel.

[0010] As a kind of preference, the inner wall of the push sleeve or the middle outer wall of the mold core is circumferentially provided with a plurality of gas conveying flat positions in sequence, each gas conveying flat position extends along the axial direction, and the plurality of gas conveying flat positions and the middle outer wall of the mold core or the inner wall of the push sleeve form a plurality of gas conveying channels.

[0011] As a kind of preference, the gas conveying structure further includes an air inlet groove. The air inlet groove is circumferentially arranged on the inner wall of the push sleeve, the air inlet channel outlet of the air inlet channel extends into the air inlet groove, and the air inlet groove and the middle outer wall of the mold core form an air inlet space; alternatively, the air inlet groove is circumferentially arranged on the middle outer wall of the mold core, the air inlet groove and the inner wall of the push sleeve form an air inlet space, and the air inlet channel outlet of the air inlet channel is communicated with the air inlet space. The bottom end of the gas conveying channel is communicated with the air inlet space.

[0012] As a preferred embodiment, the inner wall of the push sleeve or the middle outer wall of the mold core is provided with an air storage groove that surrounds the circumference, and an air storage space is formed between the air storage groove and the middle outer wall of the mold core or the inner wall of the push sleeve.

[0013] As a preferred embodiment, a back plate is installed at the bottom of the mold core plate, the back plate is provided with a cooling medium inlet channel, the mold core plate is provided with a manifold and a cooling medium outlet channel, the manifold and the cooling medium outlet channel are connected; the mold core is provided with a cooling medium transmission channel, the cooling medium transmission channel is connected to the cooling medium inlet channel and the manifold respectively.

[0014] As a preferred embodiment, the mold core includes an inner mold core and an outer mold core. The outer mold core is sleeved on the outside of the inner mold core, and the gap between the outer mold core and the inner mold core forms a side flow channel. The inner mold core is provided with an inner mold core flow channel extending along its axial direction. The inner mold core flow channel is connected to the side flow channel through at least one connecting port on the inner mold core. The inner mold core flow channel is connected to the cooling medium inlet channel. The side flow channel is connected to the confluence groove.

[0015] In summary, the present invention has the following advantages: 1. The blowing path of the punch assembly of the present invention is set between the push sleeve and the die core, so that the die core has space to set a cooling channel, avoiding cross-flow between the cooling medium and the gas.

[0016] 2. The punch assembly of the present invention ensures that when the push plate vents to the push sleeve, the gas will not overflow through the gap between the push plate and the push sleeve by providing a sealing structure around the connection between the air inlet channel and the air outlet channel.

[0017] 3. The punch assembly of the present invention has multiple ventilation flats arranged circumferentially along the inner wall of the push sleeve or the middle outer wall of the mold core, thereby increasing the cross-sectional area of ​​the ventilation channel. The ventilation flats are easier to process than the arc-shaped ventilation recesses. This ensures stable gas flow and pressure, uniform demolding blowing, and that the bottle cap can be removed from the mold, thus ensuring the normal operation of fully automated production. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of the punch assembly in Embodiment 1.

[0019] Figure 2 This is a cross-sectional view of the push sleeve in Embodiment 1.

[0020] Figure 3 This is a schematic diagram of the mold core in Example 2.

[0021] Figure 4 This is a cross-sectional view of the mold core of Example 2.

[0022] Figure 5 This is a cross-sectional view of the punch assembly in Embodiment 3.

[0023] Among them, 1 is the push sleeve, 11 is the positioning protrusion, 12 is the bottom section, 121 is the air inlet groove, 122 is the sealing ring groove, 13 is the top section, 141 is the air inlet groove, 142 is the air inlet channel outlet, 143 is the air storage groove, 2 is the push plate, 21 is the stepped hole, 211 is the upper stepped hole, 212 is the lower stepped hole, 3 is the mold core, 31 is the forming part, 32 is the ventilation flat part, 4 is the mold core plate, 5 is the outer mold core, 6 is the side flow channel, 7 is the inner mold core, 8 is the back plate, 91 is the liquid inlet channel, 92 is the cooling medium inlet channel, 93 is the cooling medium outlet channel, 94 is the manifold, and 95 is the inner mold core flow channel. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to specific embodiments.

[0025] Example 1 like Figures 1-3 As shown, this embodiment provides a punch assembly, including a push plate assembly and a core plate assembly; The push plate assembly includes a push sleeve 1 and a push plate 2, which are connected to move with the push plate 2; The pusher assembly is equipped with an air intake structure for introducing gas from the outside; The mold core plate assembly includes a mold core 3 and a mold core plate 4. The bottom of the mold core 3 is installed inside the mold core plate 4, and the top of the mold core 3 is a forming part 31 for forming bottle caps. In the molding state, the push sleeve 1 is fitted on the middle outer wall of the mold core 3. An air supply structure is formed between the inner wall of the push sleeve 1 and the middle outer wall of the mold core 3. The bottom end of the air inlet structure is connected to the bottom end of the air supply structure. The top of the inner wall of the push sleeve 1 is sealed to the middle outer wall of the mold core 3, thus isolating the top end of the air supply structure from the molding part 31. In the demolded state, the top of the inner wall of the push sleeve 1 is unsealed from the middle outer wall of the mold core 3, so that the top of the air supply structure is connected to the forming part 31.

[0026] In this embodiment, the air blowing path of the punch assembly is set between the push sleeve 1 and the die core 3, so that the die core 3 has space to set a cooling channel, avoiding cross-flow between the cooling medium and the gas.

[0027] The air intake structure includes an air intake channel and an air intake passage. The air intake channel is located in the push plate 2 and is used to introduce gas from the outside. The air intake channel penetrates the side wall of the push sleeve 1. The air intake channel is connected to the air intake passage and a sealing structure is provided around the connection.

[0028] In some embodiments, the sealing structure includes two sealing ring grooves 122, which surround the inner wall of the mounting hole and are respectively located on the upper and lower sides of the air inlet, or the two sealing ring grooves 122 surround the outer wall of the push sleeve 1 and are respectively located on the upper and lower sides of the air intake channel inlet.

[0029] By setting up a sealing structure in this way, it is ensured that the connection between the air intake channel and the air inlet channel is completely sealed. When the push plate 2 passes air to the push sleeve 1, the gas will not overflow through the gap between the push plate 2 and the push sleeve 1.

[0030] The air intake structure also includes an air inlet slot 121; The push plate 2 has mounting holes inside, and the push sleeve 1 is installed into the mounting holes; The air inlet groove 121 is circumferentially arranged on the inner wall of the mounting hole, the air inlet of the air inlet channel extends into the air inlet groove 121, and an air inlet space is formed between the air inlet groove 121 and the outer wall of the push sleeve 1. The air inlet of the air inlet channel is connected to the air inlet space. Alternatively, the air inlet groove 121 is circumferentially arranged on the outer wall of the push sleeve 1, the air inlet of the air inlet channel extends into the air inlet groove 121, an air inlet space is formed between the air inlet groove 121 and the inner wall of the mounting hole, and the air inlet of the air inlet channel is connected to the air inlet space.

[0031] By setting the air inlet groove 121 in this way, the airflow entering from the air inlet is buffered circumferentially on the outer wall of the push sleeve 1, reducing the air pressure and reducing the occurrence of eddies or backflows in the airflow at the air inlet groove 121.

[0032] The mounting hole is a stepped hole 21, which includes an upper stepped hole 211 and a lower stepped hole 212. The outer wall of the push sleeve 1 is provided with a positioning protrusion 11 that surrounds the circumference. The positioning protrusion 11 divides the outer wall of the push sleeve 1 into a bottom section 12 and a top section 13. The upper stepped hole 211 extends through to the top surface of the push plate 2 and is adapted to the positioning protrusion 11; the lower stepped hole 212 extends through to the bottom surface of the push plate 2 and is adapted to the bottom section 12. The bottom section 12 is inserted into the lower stepped hole 212 until the positioning protrusion 11 engages with the upper stepped hole 211 to limit the installation. When the inner wall of the mounting hole is provided with an air inlet or air inlet groove 121 and / or a sealing structure, the air inlet or air inlet groove 121 and / or sealing structure is located on the inner wall of the lower stepped hole 212.

[0033] In the molding state, the air supply structure includes an air passage and an air storage space located between the inner wall of the push sleeve 1 and the middle outer wall of the mold core 3. The air inlet structure is connected to the bottom end of the air supply passage, the top end of the air supply passage is connected to the air storage space, and the air storage space is isolated from the molding part 31. In the demolded state, the air supply structure also includes an air blowing channel formed between the top of the inner wall of the push sleeve 1 and the middle outer wall of the mold core 3, and the air storage space is connected to the molding part 31 through the air blowing channel.

[0034] Example 2 When the ventilation channel between the inner wall of the push sleeve 1 or the middle outer wall of the mold core 3 is a concave arc, the cross-sectional area of ​​the ventilation channel formed between the concave arc and the push sleeve 1 is small. In order to pass through the narrow ventilation channel, the gas flow rate must be increased. When the gas quickly passes through the narrow ventilation channel and enters the relatively open gas storage space, the flow rate will drop suddenly. This drastic speed change can easily cause the airflow to separate from the channel wall and generate vortices or backflow zones in the air intake space downstream of the ventilation channel. Vortices or backflow zones will increase the resistance to gas passage.

[0035] To solve the above problems, such as Figures 2-4 As shown, in the punch assembly of this embodiment, the inner wall of the push sleeve 1 or the middle outer wall of the mold core 3 is provided with a plurality of ventilation flats 32 in sequence along the circumference, and each ventilation flat 32 extends parallel to the axial direction; the plurality of ventilation flats 32 and the middle outer wall of the mold core 3 or the inner wall of the push sleeve 1 form a plurality of ventilation channels. By changing the arc-shaped ventilation recess to a ventilation flat 32, the cross-sectional area of ​​the ventilation channel is increased, and the ventilation flat 32 is easier to process than the ventilation recess; this ensures stable gas flow and pressure, ensures uniform demolding blowing, ensures that the bottle cap can be removed from the mold, and ensures the normal operation of fully automated production.

[0036] The gas transmission structure also includes an air inlet 141; An air inlet groove 141 is circumferentially arranged on the inner wall of the push sleeve 1, and the air inlet channel outlet extends into the air inlet groove 141, forming an air inlet space between the air inlet groove 141 and the middle outer wall of the mold core 3; or, the air inlet groove 141 is circumferentially arranged on the middle outer wall of the mold core 3, and an air inlet space is formed between the air inlet groove 141 and the inner wall of the push sleeve 1, and the air inlet channel outlet is connected to the air inlet space. The bottom of the ventilation channel is connected to the air intake space.

[0037] An air storage groove 143 is provided on the inner wall of the push sleeve 1 or the middle outer wall of the mold core 3, and an air storage space is formed between the air storage groove 143 and the middle outer wall of the mold core 3 or the inner wall of the push sleeve 1.

[0038] The parts not mentioned in this embodiment are the same as in Embodiment 1.

[0039] Example 3 like Figure 5 As shown, in the punch assembly of this embodiment, a back plate 8 is installed at the bottom of the core plate 4. The back plate 8 is provided with a cooling medium inlet channel 92. The core plate 4 is provided with a manifold 94 and a cooling medium outlet channel 93, which are connected. The core 3 is provided with a cooling medium transmission channel, which is connected to the cooling medium inlet channel 92 and the manifold 94 respectively.

[0040] The mold core 3 includes an inner mold core 7 and an outer mold core 5. The outer mold core 5 is sleeved on the outside of the inner mold core 7. The gap between the outer mold core 5 and the inner mold core 7 forms a side flow channel 6. The inner mold core 7 is provided with an inner mold core flow channel 95 extending along its axial direction. The inner mold core flow channel 95 communicates with the side flow channel 6 through at least one connecting port on the inner mold core 7. The inner mold core flow channel 95 communicates with the cooling medium inlet channel 92. The side flow channel 6 communicates with the confluence groove 94. A sealing structure is also provided between the inner mold core 7 and the outer mold core 5. The sealing structure is located between the connecting port and the top of the mold core 3. As one embodiment, the sealing structure includes at least one sealing ring assembly arranged along the axial direction of the mold core 3. The sealing ring assembly includes a sealing ring groove and a sealing ring therein provided in at least one of the inner mold core 7 and the outer mold core 5.

[0041] During implementation, a sealing structure is provided around the cooling channel between the outer mold core 5 and the mold core plate 4 and the back plate 8; a sealing structure is also provided around the cooling channel between the inner mold core 7 and the back plate 8; the sealing structure is the same as the sealing ring assembly between the inner mold core 7 and the outer mold core 5, and the setting direction is determined according to the specific location.

[0042] It should be noted that the back plate 8 is provided with a liquid inlet channel 91 for external liquid input, and the cooling medium inlet channel 92 is connected to the liquid inlet channel 91.

[0043] The cooling medium transmission channel described above forms a cooling channel consisting of a cooling medium inlet channel 92 for the back plate 8, an inner mold core flow channel 95, a side flow channel 6 between the inner mold core 7 and the outer mold core 5, a confluence groove 94, and a cooling medium outlet channel 93 for the mold core plate flow channel. In other embodiments, the cooling medium in the cooling channel flows in the opposite direction. In this embodiment, the air blowing path is set between the push sleeve 1 and the mold core 3, so that the inner mold core 7 has space to set the cooling channel, avoiding cross-flow between the cooling medium and the gas; the cooling medium can enter a position closer to the bottle cap (product) through the inner mold core 7 to provide more efficient cooling and improve the quality of the bottle cap (product).

[0044] The parts not mentioned in this embodiment are the same as in Embodiment 1 and Embodiment 2.

[0045] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A punch assembly, characterized in that: Includes push plate assembly and core plate assembly; The push plate assembly includes a push sleeve and a push plate, which are connected to move with the push plate; The pusher assembly is equipped with an air intake structure for introducing gas from the outside; The mold core plate assembly includes a mold core and a mold core plate. The bottom of the mold core is installed inside the mold core plate, and the top of the mold core is a forming part for forming bottle caps. In the molding state, the push sleeve is fitted onto the middle outer wall of the mold core, and an air supply structure is formed between the inner wall of the push sleeve and the middle outer wall of the mold core. The bottom end of the air inlet structure is connected to the bottom end of the air supply structure, and the top of the inner wall of the push sleeve is sealed to the middle outer wall of the mold core, thus isolating the top end of the air supply structure from the molding part. In the demolded state, the top of the inner wall of the ejector sleeve is unsealed from the middle outer wall of the mold core, allowing the top of the air supply structure to connect with the forming part.

2. The punch assembly according to claim 1, characterized in that: The air intake structure includes an air intake channel and an air intake passage. The air intake channel is located in the push plate and is used to introduce gas from the outside. The air intake channel penetrates the side wall of the push sleeve. The air intake channel is connected to the air intake passage and a sealing structure is provided around the connection.

3. The punch assembly according to claim 2, characterized in that: The air intake structure also includes an air inlet slot; The push plate has mounting holes inside, and the push sleeve is installed into the mounting holes; An air inlet groove is circumferentially arranged on the inner wall of the mounting hole. The air inlet of the air inlet channel extends into the air inlet groove. An air inlet space is formed between the air inlet groove and the outer wall of the push sleeve. The air inlet of the air inlet channel is connected to the air inlet space. Alternatively, the air inlet groove is circumferentially arranged on the outer wall of the push sleeve, the air inlet of the air inlet channel extends into the air inlet groove, an air inlet space is formed between the air inlet groove and the inner wall of the mounting hole, and the air inlet of the air inlet channel is connected to the air inlet space.

4. The punch assembly according to claim 3, characterized in that: The mounting hole is a stepped hole, which includes an upper stepped hole and a lower stepped hole. The outer wall of the push sleeve is provided with a positioning protrusion that surrounds the circumference. The positioning protrusion divides the outer wall of the push sleeve into a bottom section and a top section. The upper stepped hole extends to the top surface of the push plate and matches the positioning protrusion; the lower stepped hole extends to the bottom surface of the push plate and matches the bottom section. Insert the bottom section into the lower stepped hole until the positioning protrusion engages with the upper stepped hole to complete the installation. When the inner wall of the mounting hole is provided with an air inlet or air inlet groove and / or sealing structure, the air inlet or air inlet groove and / or sealing structure is located on the inner wall of the lower stepped hole.

5. The punch assembly according to claim 1, characterized in that: In the molding state, the air supply structure includes an air passage and an air storage space located between the inner wall of the push sleeve and the middle outer wall of the mold core. The air inlet structure is connected to the bottom end of the air supply passage, the top end of the air supply passage is connected to the air storage space, and the air storage space is isolated from the molding part. In the demolded state, the air supply structure also includes an air blowing channel formed between the top of the inner wall of the push sleeve and the middle outer wall of the mold core, and the air storage space is connected to the molding part through the air blowing channel.

6. The punch assembly according to claim 5, characterized in that: The inner wall of the push sleeve or the middle outer wall of the mold core is provided with multiple ventilation flats in sequence along the circumference, and each ventilation flat extends parallel to the axial direction; multiple ventilation flats and the middle outer wall of the mold core or the inner wall of the push sleeve form multiple ventilation channels.

7. The punch assembly according to claim 5, characterized in that: The gas delivery structure also includes an air inlet trough; An air inlet groove is circumferentially arranged on the inner wall of the push sleeve, and the air inlet channel outlet extends into the air inlet groove, forming an air inlet space between the air inlet groove and the middle outer wall of the mold core; or, an air inlet groove is circumferentially arranged on the middle outer wall of the mold core, and an air inlet space is formed between the air inlet groove and the inner wall of the push sleeve, and the air inlet channel outlet is connected to the air inlet space. The bottom of the ventilation channel is connected to the air intake space.

8. The punch assembly according to claim 5, characterized in that: The inner wall of the push sleeve or the middle outer wall of the mold core is provided with an air storage groove that surrounds the circumference, and an air storage space is formed between the air storage groove and the middle outer wall of the mold core or the inner wall of the push sleeve.

9. The punch assembly according to claim 1, characterized in that: The bottom of the mold core plate is equipped with a back plate, which has a cooling medium inlet channel. The mold core plate has a manifold and a cooling medium outlet channel, which are connected. The mold core has a cooling medium transmission channel, which is connected to the cooling medium inlet channel and the manifold respectively.

10. The punch assembly according to claim 9, characterized in that: The mold core includes an inner mold core and an outer mold core. The outer mold core is sleeved on the outside of the inner mold core. The gap between the outer mold core and the inner mold core forms a side flow channel. The inner mold core is provided with an inner mold core flow channel extending along its axial direction. The inner mold core flow channel is connected to the side flow channel through at least one connecting port on the inner mold core. The inner mold core flow channel is connected to the cooling medium inlet channel. The side flow channel is connected to the confluence groove.

Images