CN112976515B

CN112976515B - Forced demoulding mechanism with on-machine quick-release structure

Info

Publication number: CN112976515B
Application number: CN202110477915.1A
Authority: CN
Inventors: 丁波; 顾初青; 冯一宰; 施孝剑
Original assignee: Ningbo Mingfei Auto Parts Co ltd
Current assignee: NINGHAI FIRST-RATE INJECTION MOULD Co.,Ltd.
Priority date: 2021-04-30
Filing date: 2021-04-30
Publication date: 2021-07-20
Anticipated expiration: 2041-04-30
Also published as: CN112976515A

Abstract

The application discloses a forced demolding mechanism with an on-machine quick-release structure, which comprises a molding template, a back-off molding block, a connecting rod, a driving assembly, an on-machine quick-release insert and an air-assisted demolding assembly; the forming template is longitudinally provided with a connecting channel, and the upper end of the forming template is provided with a quick-release cavity; the back-off forming block is detachably arranged at the upper end of the connecting rod, and the connecting rod is movably arranged in the connecting channel along the longitudinal direction; the on-machine quick-release insert is detachably embedded in the quick-release chamber; a guide hole is formed in the quick-release insert along the longitudinal direction and communicated with the connecting channel, and the back-off forming block penetrates through and is tightly attached to the guide hole; the inverted forming block is provided with a micro-pore, the connecting rod is provided with an air passage, and the micro-pore is communicated with the air passage. Has the advantages of smooth demoulding and high forming quality.

Description

Forced demoulding mechanism with on-machine quick-release structure

Technical Field

The application relates to the field of injection molds, in particular to a forced demolding mechanism.

Background

The product is forcibly released from the mold cavity by utilizing the plastic deformation of the plastic part, namely, the forced demolding is called. The forced demoulding needs to meet the conditions that the concave parts of the inner side and the outer side of the plastic part are shallow, and meanwhile, the plastic for forming the plastic part is polyethylene, polypropylene, polyformaldehyde and other plastic with enough elasticity. In order to avoid the excessive demoulding resistance during forced demoulding to cause the damage and deformation of the plastic part, the undercut depth of the plastic part must be within the required reasonable range, and meanwhile, the concave-convex fluctuation part is designed into a fillet or inclined plane transition structure. Because the inverted-buckle forming block subjected to forced demolding needs to be provided with a special structure and reasonable parameters, repeated mold testing is often needed, and when the inverted-buckle forming block is too large or too small in size or unreasonable in structure after mold testing, replacement or reprocessing is needed to ensure the forming precision of the inverted-buckle structure of the plastic part. However, the cost of directly processing the inverted molding block on a die with a large external dimension is high, the processing precision is difficult to control, and many parts are often required to be disassembled to replace the inverted molding block, which is very inconvenient.

In addition, the contact area between the inverted buckle forming block and the inverted buckle structure is large, the die bonding force between the inverted buckle forming block and the inverted buckle structure is also large, the die bonding phenomenon is easy to occur during forced demoulding, and the forming quality is influenced.

Therefore, how to improve the existing forced demolding structure to overcome the above problems is a problem to be solved by those skilled in the art.

Disclosure of Invention

An object of this application is to provide a convenient change or reprocess back-off shaping piece, and the drawing of patterns is smooth, and shaping high quality has at quick detach structure's forced demoulding mechanism.

Another aim at of this application provides a easy dismounting, and the processing cost is low, and the machining precision is high at quick detach mold insert.

Still another aim at of this application provides a simple structure, simple to operate, and control is simple and convenient, and drawing of patterns subassembly is assisted to reliable operation gas.

In order to achieve the above purposes, the technical scheme adopted by the application is as follows: a forced demolding mechanism with an on-machine quick-release structure comprises a molding template, a back-off molding block, a connecting rod, a driving assembly, an on-machine quick-release mold insert and an air-assisted demolding assembly.

The forming template is longitudinally provided with a connecting channel, and the upper end of the forming template is provided with a quick-release cavity.

The back-off forming block is detachably arranged at the upper end of the connecting rod, the connecting rod is arranged in the connecting channel in a longitudinally movable mode, and the driving assembly is suitable for driving the back-off forming block to perform forced demolding along longitudinal displacement through the connecting rod.

The on-machine quick-release insert is detachably embedded in the quick-release cavity, and the outer end surface of the on-machine quick-release insert and the outer end surface of the forming template are smoothly connected to form a forming cavity wall; and a guide hole is longitudinally formed in the quick-release insert, the guide hole is communicated with the connecting channel, and the back-off forming block penetrates through and is tightly attached in the guide hole.

The inverted molding block is provided with a micro-air hole, the connecting rod is provided with an air passage, and the micro-air hole is communicated with the air passage; the gas-assisted demoulding component can inflate the air passage and the micro-air hole when the back-off forming block and the connecting rod are subjected to forced demoulding along longitudinal displacement, so that the air pressure between the back-off forming block and the plastic part is increased.

Preferably, the lower end of the back-off forming block is provided with a T-shaped clamping column, a T-shaped clamping groove is transversely formed in the upper end of the connecting rod, the T-shaped clamping column is suitable for transversely passing in and out the T-shaped clamping groove, and the back-off forming block is detachably connected with the connecting rod.

At quick detach mold insert include function portion and let position portion, the guiding hole set up in the function portion, let position portion to T type draw-in groove opening one side extends, just let position portion downwardly extending exceed T type draw-in groove, at quick detach mold insert follow the quick detach cavity breaks away from the back, the quick detach cavity is in let position portion department reserve have the confession back-off profiled segment breaks away from along lateral shifting the space of connecting rod. The inverted molding block and the connecting rod are connected in a sliding mode along the transverse direction, so that the assembly and disassembly are convenient; and the quick-release cavity and the on-machine quick-release insert reserve a transverse in-and-out space of the back-off forming block.

Preferably, the connecting rod is provided with an installation cavity, and the gas-assisted demoulding assembly is arranged in the installation cavity; the gas-assisted demoulding assembly comprises a piston cavity, a piston rod and a positioning piece, wherein the piston cavity is longitudinally arranged on the connecting rod, the upper end of the piston cavity is communicated with the air passage, the lower end of the piston cavity is communicated with the installation cavity, the piston rod is arranged in the piston cavity along longitudinal sliding, the positioning piece is fixedly arranged at the lower end of the piston rod, and the positioning piece extends out of the installation cavity and is suitable for fixed connection with the forming template. The working principle is as follows: when the inverted molding block and the connecting rod are forced to demold along the longitudinal displacement, the piston rod can compress the air in the piston cavity, and the air pressure between the inverted molding block and the plastic part is increased through the diversion of the air passage and the micro-air holes.

The gas-assisted demoulding assembly is arranged in the connecting rod and utilizes the movement of the connecting rod to inflate, does not need an additional gas supply system, and has the advantages of simple and compact structure, simple and convenient control and reliable operation.

As an improvement, a limit groove is formed in the side wall of the connecting channel along the longitudinal direction, and the upper end of the limit groove is opened; the spacer extends into the spacing inslot, just spacing groove lower extreme is contradicted the spacer limits the spacer downward displacement, the spacer with be provided with positioning spring between the connecting rod, positioning spring forces the spacer downward sliding is contradicted all the time the spacing groove lower extreme. Above-mentioned structure is convenient for the connecting rod and is assisted drawing of patterns subassembly from last down installing the interface channel in with gas, and the spacing groove has the effect of stepping down the spacer and being convenient for install, and the downward displacement of spacer and the cooperation of positioning spring carry out the effect of fixing again.

The improved structure is characterized in that an anti-falling elastic sheet is further arranged at the bottom of the installation cavity and can elastically stretch along the longitudinal direction, and the total height of the piston rod, the positioning sheet and the compressed anti-falling elastic sheet is slightly smaller than the length of the installation cavity. The anti-falling elastic sheet can be abutted against the lower end of the positioning sheet when unfolded, so that the piston rod can be limited to be separated from the piston cavity, and the piston rod can be separated from the piston cavity when the anti-falling elastic sheet is compressed, so that the anti-falling elastic sheet is convenient to mount and dismount.

As an improvement, the connecting rod is in the air flue upper end has been seted up the seal groove, be provided with seal ring in the seal groove, back-off shaping piece lower extreme face is contradicted seal ring up end, the through-hole has been seted up at seal ring center, the through-hole intercommunication the air flue with the micropore. The sealing performance of the air passage and the micro-pores is ensured by the arrangement of the sealing washer.

Preferably, the sealing washer is provided with a deformation ring on the periphery of the upper end of the through hole, the inverted forming block is suitable for extruding the deformation ring to realize sealing connection, and the micro-air hole is positioned in the deformation ring; the provision of the deformation ring further increases the tightness.

The outer side of the deformation ring is provided with a guide surface which is inclined from top to bottom from inside to outside; the setting of guide face is convenient for back-off shaping piece business turn over connecting rod.

The sealing ring is characterized in that a convex edge is arranged on the periphery of the sealing groove, a groove is formed in the periphery of the sealing ring, and the convex edge is matched with the groove in a clamping manner and is suitable for limiting the sealing ring to be separated from the sealing groove. The above structure increases the stability of the structure.

In one embodiment, a fastening bolt is arranged between the quick-release insert and the forming template, and the fastening bolt is suitable for penetrating through the quick-release insert in the longitudinal direction and being in threaded connection with the forming template.

As another embodiment, a lock tongue assembly is arranged between the on-machine quick-release insert and the forming template, a lock groove is formed in one side of the on-machine quick-release insert, a mounting block is fixedly arranged on one side of the forming template, and the lock tongue assembly is arranged in the mounting block.

The lock tongue component comprises a lock tongue, a reset spring and a shift lever, the lock tongue is arranged in the mounting block and the forming template in a sliding mode along the transverse direction, the lock tongue is suitable for penetrating through the forming template and entering the lock groove and used for fixing the on-machine quick-release insert on the forming template, the reset spring is arranged between the lock tongue and the mounting block and forces the lock tongue to enter the lock groove, the shift lever is fixedly arranged on the lock tongue, the shift lever longitudinally extends out of the mounting block and the forming template, the shift lever is pushed to enable the lock tongue to overcome the elasticity of the reset spring and exit the lock groove and used for detaching the on-machine quick-release insert from the forming template.

As a general arrangement, the driving assembly is an oil cylinder, the oil cylinder comprises a cylinder barrel and a cylinder rod, a gap base plate is fixedly arranged below the forming template, the cylinder barrel is fixedly arranged on the gap base plate, a lower coupling block is fixedly arranged at the upper end of the cylinder rod, the connecting rod extends downwards and penetrates through the forming template, an upper coupling block is fixedly arranged at the lower end of the connecting rod, the lower coupling block is suitable for transversely entering the upper coupling block, and the upper coupling block and the lower coupling block can be longitudinally fixed and are used for connecting the connecting rod and the cylinder rod. The oil cylinder is the most common driving device in the field of dies.

Compared with the prior art, the beneficial effect of this application lies in:

(1) according to the scheme, the requirement on the machining precision of the guide hole on the quick-release insert on the machine is high, but the outline dimension of the mold is large, the cost for machining a small hole on a large part is high, and the machining precision is difficult to control; therefore, the guide hole is arranged on the detachable quick-release mold insert, small part machining holes can be realized, machining cost can be effectively reduced, and machining modes can be diversified and convenient to machine. In a word, the machining economy and the precision controllability of the guide hole are realized by the detachable arrangement of the on-machine quick-release insert.

(2) The inverted buckle structure of the molded plastic part needs to be provided with other accessories, the requirement on the installation size is high, and the inverted buckle molding block needs to be replaced or reprocessed when the size is too large or too small after mold test. Consequently, this scheme still sets up detachable back-off one-tenth briquetting on the basis of machine quick detach mold insert can be dismantled in the setting, and the convenience is changed or is reprocessed the back-off one-tenth briquetting at any time, guarantees mould processing assembly efficiency and shaping precision.

(3) In order to avoid the occurrence of the die bonding phenomenon, the gas-assisted demoulding assembly is arranged in the scheme and is used for inflating the air passage and the micro-air hole, so that the air pressure between the inverted forming block and the plastic part is increased, the inverted structure of the plastic part is deformed by a certain amount, a small gap is formed between the inverted forming block and the plastic part, the die bonding force is effectively reduced, and forced demoulding is facilitated. It is worth mentioning that the gas-assisted demoulding assembly is arranged in the connecting rod and is inflated by the movement of the connecting rod, and a piston rod and the connecting rod in the structure are respectively equivalent to a piston and a needle cylinder of a needle cylinder injector; the difference is that the syringe injector generally adopts piston motion and syringe fixation for injection, while the air-assisted demoulding component adopts the scheme that a piston rod (equivalent to a piston) is fixed and a connecting rod (equivalent to a syringe) operates for inflation. Therefore, the gas-assisted demoulding assembly has the advantages of simple and compact structure, simplicity and convenience in control and reliability in operation.

(4) It should be noted that the pore diameter of the micro-pores on the inverted molding block is very small, and the melted plastic part is not easy to enter during injection molding. When the inverted molding block is reset (in the mold closing process), the air-assisted demolding component moves reversely to suck air, so that normal air pressure (close to atmospheric pressure) is kept in the micro-air hole and the air passage; therefore, the micro-air holes can also be used as exhaust passages during injection molding, so that part of air in the cavity of the plastic part reverse-buckling structure enters the air passage and the piston cavity in the injection molding process, and the air holes cannot be formed in the plastic part. It is worth mentioning that, in the injection and exhaust process, the air pressure in the air passage and the piston cavity rises and is slightly higher than the atmospheric pressure, so that large margins are reserved in the volume design of the air passage and the piston cavity, and the normal exhaust of the micro-pores is avoided being influenced by the overlarge air pressure in the air passage and the piston cavity.

Drawings

FIG. 1 is a perspective view of a mold closed injection molding configuration according to a preferred embodiment of the present application.

Fig. 2 is a schematic perspective view of a mold-opened and demolded state according to a preferred embodiment of the present application.

Fig. 3 is a schematic perspective view of a reverse forming block and a quick release insert in a disassembled state according to a preferred embodiment of the present application.

Fig. 4 is a half sectional view of fig. 1 according to a preferred embodiment of the present application.

Fig. 5 is a half sectional view of fig. 2 according to a preferred embodiment of the present application.

FIG. 6 is an enlarged view at A of FIG. 4 in accordance with a preferred embodiment of the present application.

FIG. 7 is an enlarged view at B of FIG. 5 in accordance with a preferred embodiment of the present application.

FIG. 8 is an enlarged view at C of FIG. 5 in accordance with a preferred embodiment of the present application.

FIG. 9 is a perspective view of a forming die plate according to a preferred embodiment of the present application.

FIG. 10 is a schematic half-section view of a forming die plate according to a preferred embodiment of the present application.

FIG. 11 is a perspective view of a connecting rod and air-assisted stripper assembly according to a preferred embodiment of the present application.

Fig. 12 is an exploded view of fig. 11 in accordance with a preferred embodiment of the present application.

FIG. 13 is a half sectional view of FIG. 11 in accordance with a preferred embodiment of the present application.

Fig. 14 is a half sectional view of the anti-drop spring plate of fig. 11 after compression according to a preferred embodiment of the present application.

Figure 15 is a half sectional view of a sealing gasket according to a preferred embodiment of the present application.

FIG. 16 is a half sectional view of an inverted shaped block according to a preferred embodiment of the present application.

Fig. 17 is a perspective view of an on-machine quick release insert according to a preferred embodiment of the present application.

Fig. 18 is a perspective view of a latch bolt assembly according to a preferred embodiment of the present application.

FIG. 19 is a partial half sectional view of FIG. 18 in accordance with a preferred embodiment of the present application.

Fig. 20 is a perspective view of a locking bolt assembly locked on a quick release insert according to a preferred embodiment of the present application.

Fig. 21 is a perspective view of a latch bolt assembly unlocked on a quick release insert according to a preferred embodiment of the present application.

In the figure: 1. forming a template; 11. a connecting channel; 12. a quick release chamber; 13. a limiting groove; 2. reversing and forming the block; 21. t-shaped clamping columns; 22. micro-pores; 3. a connecting rod; 31. a T-shaped clamping groove; 32. an airway; 33. a mounting cavity; 34. a sealing groove; 341. convex edges; 4. a drive assembly; 41. a cylinder barrel; 42. a cylinder rod; 43. a gap backing plate; 44. a lower coupling block; 45. an upper coupling block; 5. quickly disassembling the mold insert on machine; 50. a guide hole; 51. a functional section; 52. a relief portion; 53. locking the groove; 6. a gas-assisted demoulding component; 61. a piston cavity; 62. a piston rod; 63. positioning plates; 64. a positioning spring; 65. an anti-falling elastic sheet; 7. a sealing gasket; 71. a through hole; 72. a deformation ring; 73. a groove; 721. a guide surface; 8. fastening a bolt; 9. a latch bolt assembly; 90. mounting blocks; 91. a latch bolt; 92. a return spring; 93. a deflector rod.

Detailed Description

The present application is further described below with reference to specific embodiments, and it should be noted that, without conflict, any combination between the embodiments or technical features described below may form a new embodiment.

In the description of the present application, it should be noted that, for the terms of orientation, such as "central", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., it indicates that the orientation and positional relationship shown in the drawings are based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be construed as limiting the specific scope of protection of the present application.

The terms "comprises," "comprising," and "having," and any variations thereof, in the description and claims of this application, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

As shown in fig. 1 to 21, a preferred embodiment of the present application includes a forming die plate 1, an undercut forming block 2, a connecting rod 3, a driving assembly 4, an on-machine quick release insert 5, and a gas-assisted demolding assembly 6.

Specifically, the forming template 1 in this embodiment is a moving template, the forming template 1 is provided with a connecting channel 11 along a longitudinal direction, the upper end of the forming template 1 is provided with a quick-release cavity 12, the side wall of the connecting channel 11 is provided with a limiting groove 13 along the longitudinal direction, and the upper end of the limiting groove 13 is open.

One key point is that the inverted molding block 2 is detachably arranged at the upper end of the connecting rod 3, the connecting rod 3 is arranged in the connecting channel 11 in a longitudinally movable mode, and the driving assembly 4 is suitable for driving the inverted molding block 2 to perform forced demolding along longitudinal displacement through the connecting rod 3. In this embodiment, the lower end of the inverted forming block 2 is provided with a T-shaped clamping column 21, the upper end of the connecting rod 3 is transversely provided with a T-shaped clamping groove 31, the T-shaped clamping column 21 is suitable for transversely passing in and out the T-shaped clamping groove 31, and the inverted forming block 2 and the connecting rod 3 can be detachably connected.

The other key point is that the on-machine quick-release insert 5 is detachably embedded in the quick-release cavity 12, and the outer end surface of the on-machine quick-release insert 5 and the outer end surface of the forming template 1 are smoothly connected to form a forming cavity wall; a guide hole 50 is longitudinally formed in the quick-release insert 5, the guide hole 50 is communicated with the connecting channel 11, and the back-off forming block 2 penetrates through and is tightly attached to the guide hole 50. In order to adapt the inverted buckle forming block 2 to enter and exit the connecting rod 3 along the transverse direction, the quick release insert 5 comprises a functional part 51 and a yielding part 52, the guide hole 50 is formed in the functional part 51, the yielding part 52 extends towards the opening side of the T-shaped clamping groove 31, the yielding part 52 extends downwards to exceed the T-shaped clamping groove 31, and after the quick release insert 5 is separated from the quick release cavity 12, the quick release cavity 12 is reserved at the yielding part 52 with a space for the inverted buckle forming block 2 to separate from the connecting rod 3 along the transverse direction.

In order to avoid the occurrence of the die sticking phenomenon, the inverted molding block 2 is provided with a micro-air hole 22, the connecting rod 3 is provided with an air passage 32, and the micro-air hole 22 is communicated with the air passage 32; the gas-assisted demoulding component 6 can inflate the air passage 32 and the micro-air hole 22 when the back-off forming block 2 and the connecting rod 3 are forced to demould along the longitudinal displacement, so that the air pressure between the back-off forming block 2 and the plastic part is increased. It is worth mentioning that, as shown in fig. 16, the micro pores 22 opened in the transverse direction may be added on the basis of the micro pores 22 opened in the longitudinal direction to increase the inflation amount.

The gas-assisted demoulding component 6 is arranged in the connecting rod 3 and is inflated by utilizing the movement of the connecting rod 3 in the embodiment, an additional gas supply system is not needed, and the gas-assisted demoulding component has the advantages of simple and compact structure, simplicity and convenience in control and reliability in operation. As shown in fig. 11 to 13, a mounting cavity 33 is formed on the connecting rod 3, and the gas-assisted demoulding assembly 6 is disposed in the mounting cavity 33; the gas-assisted demoulding assembly 6 comprises a piston cavity 61, a piston rod 62 and a positioning piece 63, wherein the piston cavity 61 is longitudinally arranged on the connecting rod 3, the upper end of the piston cavity 61 is communicated with the air passage 32, the lower end of the piston cavity 61 is communicated with the mounting cavity 33, the piston rod 62 is longitudinally arranged in the piston cavity 61 in a sliding manner, the positioning piece 63 is fixedly arranged at the lower end of the piston rod 62, and the positioning piece 63 extends out of the mounting cavity 33 and is suitable for being fixedly connected with the forming template 1.

As shown in fig. 6 and 7, the gas-assisted demoulding assembly 6 works as follows: when the inverted forming block 2 and the connecting rod 3 are displaced along the longitudinal direction for forced demoulding, the piston rod 62 can compress the air in the piston cavity 61, and the air pressure between the inverted forming block 2 and the plastic part is increased through the diversion of the air passage 32 and the micro-air hole 22. The essence of the air-assisted demoulding assembly 6 is the injection principle of the syringe injector, except that in this embodiment the connecting rod 3 (corresponding to the syringe of the syringe injector) is moved, while the piston rod 62 (corresponding to the piston of the syringe injector) is not moved.

For the convenience of installation, the locating plate 63 extends into the limiting groove 13, the lower end of the limiting groove 13 abuts against the locating plate 63 and limits the locating plate 63 to move downwards, a locating spring 64 is arranged between the locating plate 63 and the connecting rod 3, and the locating spring 64 forces the locating plate 63 to slide downwards and always abut against the lower end of the limiting groove 13. Above-mentioned structure is convenient for connecting rod 3 and assist drawing of patterns subassembly 6 from last down install in interface channel 11 with gas in, spacing groove 13 has the effect of stepping down locating piece 63 and being convenient for install, limiting piece 63 downward displacement again and with the cooperation of positioning spring 64 carry out the effect of fixing.

Similarly, the installation and the disassembly are convenient, the bottom of the installation cavity 33 is further provided with an anti-falling elastic sheet 65, the anti-falling elastic sheet 65 can elastically stretch along the longitudinal direction, and the total height of the piston rod 62, the positioning sheet 63 and the compressed anti-falling elastic sheet 65 is slightly smaller than the length of the installation cavity 33. As shown in fig. 13, the anti-falling elastic sheet 65 may abut against the lower end of the positioning sheet 63 when being unfolded, so as to limit the piston rod 62 to be separated from the piston cavity 61, as shown in fig. 14, the piston rod 62 may be separated from the piston cavity 61 when the anti-falling elastic sheet 65 is compressed, so as to facilitate installation and disassembly.

As shown in fig. 12 and 15, in order to increase the sealing performance, the connecting rod 3 is provided with a sealing groove 34 at the upper end of the air passage 32, a sealing washer 7 is arranged in the sealing groove 34, the lower end surface of the inverted forming block 2 abuts against the upper end surface of the sealing washer 7, the center of the sealing washer 7 is provided with a through hole 71, and the through hole 71 is communicated with the air passage 32 and the micro-air hole 22. The provision of the sealing gasket 7 ensures the tightness of the air passage 32 and the micro-pores 22. Wherein, the sealing washer 7 is provided with a deformation ring 72 on the upper end peripheral side of the through hole 71, the back-off forming block 2 is suitable for extruding the deformation ring 72 to realize sealing connection, and the micro air hole 22 is positioned in the deformation ring 72; the provision of the deformation ring 72 further increases the sealing. The outside of the deformation ring 72 is provided with a guide surface 721 inclined from top to bottom and from inside to outside; the guide surface 721 is provided to facilitate the movement of the inverted forming block 2 in and out of the connecting rod 3. In addition, the periphery of the sealing groove 34 is provided with a convex edge 341, the periphery of the sealing washer 7 is provided with a groove 73, and the convex edge 341 and the groove 73 are clamped and matched and are suitable for limiting the sealing washer 7 to be separated from the sealing groove 34.

The removability of the quick release inserts 5 and the forming template 1 on the machine can be of various structures, and the present application provides only two implementable modes, but does not exclude any other variant embodiment or embodiments fulfilling the same function.

As a first embodiment, as shown mainly in fig. 3, a fastening bolt 8 is provided between the quick release insert 5 and the form 1, and the fastening bolt 8 is adapted to penetrate through the quick release insert 5 in the longitudinal direction and be screwed to the form 1.

As shown in fig. 18 to 21, as a second embodiment, a latch bolt assembly 9 is provided between the quick release insert 5 and the forming die plate 1, a lock groove 53 is formed on one side of the quick release insert 5, an installation block 90 is fixedly provided on one side of the forming die plate 1, and the latch bolt assembly 9 is provided in the installation block 90. The lock tongue assembly 9 comprises a lock tongue 91, a return spring 92 and a shift lever 93, the lock tongue 91 is arranged in the mounting block 90 and the forming template 1 in a transverse sliding mode, the lock tongue 91 is suitable for penetrating through the forming template 1 and entering the lock groove 53 and used for fixing the quick-release insert 5 on the forming template 1, the return spring 92 is arranged between the lock tongue 91 and the mounting block 90 and forcing the lock tongue 91 to enter the lock groove 53, the shift lever 93 is fixedly arranged on the lock tongue 91, the shift lever 93 longitudinally extends out of the mounting block 90 and the forming template 1, the shift lever 93 is pushed to enable the lock tongue 91 to overcome the elastic force of the return spring 92 and exit the lock groove 53 and used for quickly releasing the quick-release insert 5 from the forming template 1.

As shown in fig. 8, the driving assembly 4 of this embodiment is an oil cylinder, the oil cylinder includes a cylinder 41 and a cylinder rod 42, a gap pad 43 is fixedly disposed below the forming template 1, the cylinder 41 is fixedly disposed on the gap pad 43, a lower coupling block 44 is fixedly disposed at an upper end of the cylinder rod 42, the connecting rod 3 extends downward and passes through the forming template 1, an upper coupling block 45 is fixedly disposed at a lower end of the connecting rod 3, the lower coupling block 44 is suitable for entering the upper coupling block 45 along a transverse direction, and the upper coupling block 45 and the lower coupling block 44 can be longitudinally fixed for connecting the connecting rod 3 and the cylinder rod 42.

The foregoing has described the general principles, essential features, and advantages of the application. It will be understood by those skilled in the art that the present application is not limited to the embodiments described above, which are merely illustrative of the principles of the application, but that various changes and modifications may be made without departing from the spirit and scope of the application, and these changes and modifications are intended to be within the scope of the application as claimed. The scope of protection claimed by this application is defined by the following claims and their equivalents.

Claims

1. The utility model provides a forced demoulding mechanism with at quick detach structure which characterized in that: the quick-release mold comprises a molding template, a back-off molding block, a connecting rod, a driving assembly, an on-machine quick-release insert and a gas-assisted demolding assembly;

the forming template is longitudinally provided with a connecting channel, and the upper end of the forming template is provided with a quick-release cavity;

the inverted molding block is detachably arranged at the upper end of the connecting rod, the connecting rod is movably arranged in the connecting channel along the longitudinal direction, and the driving assembly is suitable for driving the inverted molding block to move along the longitudinal direction through the connecting rod so as to carry out forced demolding;

the on-machine quick-release insert is detachably embedded in the quick-release cavity, and the outer end surface of the on-machine quick-release insert and the outer end surface of the forming template are smoothly connected to form a forming cavity wall; a guide hole is formed in the quick-release insert along the longitudinal direction and communicated with the connecting channel, and the back-off forming block penetrates through and is tightly attached to the guide hole;

the inverted molding block is provided with a micro-air hole, the connecting rod is provided with an air passage, and the micro-air hole is communicated with the air passage; the gas-assisted demoulding component can inflate the air passage and the micro-air hole when the back-off forming block and the connecting rod are subjected to forced demoulding along the longitudinal displacement, so that the air pressure between the back-off forming block and the plastic part is increased;

the connecting rod is provided with an installation cavity, and the gas-assisted demoulding assembly is arranged in the installation cavity; the gas-assisted demoulding assembly comprises a piston cavity, a piston rod and a positioning piece, wherein the piston cavity is longitudinally arranged on the connecting rod, the upper end of the piston cavity is communicated with the air passage, the lower end of the piston cavity is communicated with the mounting cavity, the piston rod is longitudinally arranged in the piston cavity in a sliding manner, the positioning piece is fixedly arranged at the lower end of the piston rod, and the positioning piece extends out of the mounting cavity and is suitable for being fixedly connected with the forming template;

when the inverted molding block and the connecting rod are forced to demold along the longitudinal displacement, the piston rod can compress the air in the piston cavity, and the air pressure between the inverted molding block and the plastic part is increased through the diversion of the air passage and the micro-air holes.

2. The forced demolding mechanism with the on-machine quick-release structure as claimed in claim 1, wherein: the lower end of the back-off forming block is provided with a T-shaped clamping column, the upper end of the connecting rod is transversely provided with a T-shaped clamping groove, and the T-shaped clamping column is suitable for transversely entering and exiting the T-shaped clamping groove to realize the detachable connection of the back-off forming block and the connecting rod;

at quick detach mold insert include function portion and let position portion, the guiding hole set up in the function portion, let position portion to T type draw-in groove opening one side extends, just let position portion downwardly extending exceed T type draw-in groove, at quick detach mold insert follow the quick detach cavity breaks away from the back, the quick detach cavity is in let position portion department reserve have the confession back-off profiled segment breaks away from along lateral shifting the space of connecting rod.

3. The forced demolding mechanism with the on-machine quick-release structure as claimed in claim 1, wherein: a limiting groove is formed in the side wall of the connecting channel along the longitudinal direction, and the upper end of the limiting groove is open; the spacer extends into the spacing inslot, just spacing groove lower extreme is contradicted the spacer limits the spacer downward displacement, the spacer with be provided with positioning spring between the connecting rod, positioning spring forces the spacer downward sliding is contradicted all the time the spacing groove lower extreme.

4. A forced demoulding mechanism with an on-machine quick-release structure according to claim 3, characterized in that: the anti-falling elastic piece is further arranged at the bottom of the installation cavity and can stretch out and draw back along the longitudinal elasticity, and the total height of the piston rod, the positioning piece and the compressed anti-falling elastic piece is slightly smaller than the length of the installation cavity.

5. The forced demolding mechanism with the on-machine quick-release structure as claimed in claim 1, wherein: the connecting rod is in the seal groove has been seted up to the air flue upper end, be provided with seal ring in the seal groove, the terminal surface is contradicted under the back-off shaping piece the sealed up ring up end, the through-hole has been seted up at seal ring center, the through-hole intercommunication the air flue with the micropore.

6. The forced demolding mechanism with the on-machine quick-release structure as claimed in claim 5, wherein: the periphery of the upper end of the through hole of the sealing washer is provided with a deformation ring, the inverted forming block is suitable for extruding the deformation ring to realize sealing connection, and the micro-air hole is positioned in the deformation ring;

the outer side of the deformation ring is provided with a guide surface which is inclined from top to bottom from inside to outside;

the sealing ring is characterized in that a convex edge is arranged on the periphery of the sealing groove, a groove is formed in the periphery of the sealing ring, and the convex edge is matched with the groove in a clamping manner and is suitable for limiting the sealing ring to be separated from the sealing groove.

7. The forced demolding mechanism with the on-machine quick-release structure as claimed in claim 1, wherein: and a fastening bolt is arranged between the on-machine quick-release insert and the forming template, and is suitable for longitudinally penetrating through the on-machine quick-release insert and being in threaded connection with the forming template.

8. The forced demolding mechanism with the on-machine quick-release structure as claimed in claim 1, wherein: a lock tongue assembly is arranged between the on-machine quick-release insert and the forming template, a lock groove is formed in one side of the on-machine quick-release insert, an installation block is fixedly arranged on one side of the forming template, and the lock tongue assembly is arranged in the installation block;

9. A forced demoulding mechanism with an on-machine quick-release structure according to any one of claims 1 to 8, characterized in that: the driving assembly is an oil cylinder, the oil cylinder comprises a cylinder barrel and a cylinder rod, a gap base plate is fixedly arranged below the forming template, the cylinder barrel is fixedly arranged on the gap base plate, a lower coupling block is fixedly arranged at the upper end of the cylinder rod, the connecting rod extends downwards and penetrates through the forming template, an upper coupling block is fixedly arranged at the lower end of the connecting rod, the lower coupling block is suitable for transversely entering the upper coupling block, and the upper coupling block and the lower coupling block can be longitudinally fixed and used for connecting the connecting rod and the cylinder rod.