CN115609863A

CN115609863A - Tableware forming and demolding structure

Info

Publication number: CN115609863A
Application number: CN202211636872.8A
Authority: CN
Inventors: 胡文君; 米甲刚; 曾艳香
Original assignee: Shantou Dajian Environmental Protection Technology Co ltd
Current assignee: Shantou Dajian Environmental Protection Technology Co ltd
Priority date: 2022-12-20
Filing date: 2022-12-20
Publication date: 2023-01-17
Anticipated expiration: 2042-12-20
Also published as: CN115609863B

Abstract

The invention belongs to the technical field of plastic processing, and particularly relates to a tableware forming and demoulding structure, which can lift and demould tableware after the tableware is subjected to injection molding through a demoulding mechanism, so that the tableware can be more convenient for subsequent processing to meet the regular needs, and the production convenience and smoothness are improved; the arrangement of the on-off component can further delay the jacking of the tableware demoulding, and the phenomenon that the tableware is cooled and contracted to be clamped on the upper die to influence the demoulding due to the synchronous movement of the tableware along with the upper die is avoided; the reverse pushing mechanism can actively push and demould the tableware clamped on the upper die, so that the effectiveness of demoulding is further improved; the delay assembly can delay pushing of the tableware which is not clamped with the upper die, so that the phenomenon that the tableware is pressed by large pushing pressure to generate indentation is avoided, and the defective rate is reduced.

Description

Tableware forming and demolding structure

Technical Field

The invention belongs to the technical field of plastic processing, and particularly relates to a tableware forming and demolding structure.

Background

Tableware is a tool for people to eat and hold food, and is usually made of clay, along with the development of industrialization, tableware made of glass and metal also becomes mainstream, along with the development of modern fast-paced society, the rise of takeout industry and the wide application of plasticized products, and plastic tableware is gradually popularized and opened by utilizing plastic due to the characteristics of low production cost, simple production, convenient use and the like.

At present to the preparation of plastics tableware, the most common mode of moulding plastics at present is adopted mostly, the plastics raw materials that this mode will melt, pour into specific forming die into, treat that its mold opening takes out after the primary cooling shaping, and in order to reach high-efficient production and avoid the manual work to take out the accident, still can set up corresponding demoulding structure on injection mold at present, but the control panel of automatically controlled machine cooperation equipment is adopted usually to current conventional demoulding structure, carry out drawing of patterns operation behind the manual work debugging, such demoulding mode is moulding plastics required control debugging originally under the miscellaneous condition just, make equipment operation more inconvenient, and because ambient temperature is higher under the injection moulding environment, it is bigger to the loss of automatically controlled machine, and then need frequently overhaul the maintenance to the automatically controlled machine, and then lead to the efficiency of production, the convenience can't reach the needs.

Disclosure of Invention

The purpose of the invention is: aims to provide a tableware molding and demoulding structure for solving the problems mentioned in the background technology.

In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:

a tableware forming and demolding structure comprises an upper die and a lower die, wherein the lower die is fixedly connected with an external platform, the upper die is connected with an external lifting mechanism, and a demolding mechanism is arranged between the upper die and the lower die;

the demoulding mechanism comprises a demoulding plate, an expansion component, a jacking component and an extrusion column, wherein the lower mould is provided with an assembly cavity matched with the demoulding plate, the demoulding plate is arranged in the assembly cavity in a sliding and sealing manner, the expansion component is arranged between the demoulding plate and the lower inner wall of the assembly cavity, the jacking component is arranged on the side surface of the lower mould and is connected with the expansion component through a guide pipe embedded in the lower mould, and the extrusion column is arranged on the upper mould and is matched with the jacking component;

jacking subassembly includes first flexible post, first piston, first spring, snap ring and spacing ring, the lower mould is opened there is perpendicular chamber, the snap ring is located erect intracavity upside, first flexible post with snap ring sliding seal connects, first piston with first flexible post lower extreme fixed connection, the spacing ring with erect intracavity wall fixed connection and be located first piston with between the snap ring, the inner circle diameter of spacing ring is less than the diameter of first flexible post, pipe one end with erect the chamber intercommunication and be located the snap ring with between the spacing ring, first spring is located first piston lower extreme, the inflation subassembly intussuseption is filled with hydraulic oil.

Expansion unit includes empty section of thick bamboo, the flexible post of second, second piston and second spring, empty section of thick bamboo with inner wall fixed connection under the assembly chamber, the pipe other end with empty section of thick bamboo downside intercommunication, second piston sliding seal locates in the empty section of thick bamboo, the flexible post of second with second piston upper end fixed connection and slip stretch out empty section of thick bamboo with stripper plate lower extreme fixed connection, the second spring housing is located the flexible post of second is located in the empty section of thick bamboo, the minimum flexible pressure of first spring is greater than the maximum flexible pressure of second spring.

The guide pipe is further provided with an on-off assembly, the on-off assembly comprises a T-shaped on-off column and a third spring, the lower die is provided with a first step hole matched with the guide pipe, the T-shaped on-off column is arranged in the first step hole in a sliding sealing mode, the end portion of the T-shaped on-off column extends out, the T-shaped on-off column is provided with a communicating hole matched with the guide pipe, and the third spring is arranged at the lower end of the T-shaped on-off column; therefore, the effect of delaying lifting can be achieved, and the phenomenon that the tableware is clamped with the upper die due to synchronous lifting is avoided.

The extrusion column is further provided with a protection piece, the protection piece comprises a telescopic head and a fourth spring, the extrusion column is provided with a second stepped hole, the telescopic head is arranged in the second stepped hole in a sliding mode, the end portion of the telescopic head extends out, the fourth spring is connected with one end, located in the second stepped hole, of the telescopic head, and the minimum telescopic pressure of the fourth spring is larger than the maximum telescopic pressure of the first spring; this protects the parts and ensures effective clamping between the upper and lower dies.

The vertical section of the stripper plate is of a U-shaped structure with a downward opening.

The upper die is also uniformly provided with a plurality of reverse-thrust mechanisms, each reverse-thrust mechanism comprises a matching assembly and a pushing piece, the matching assembly is arranged on the side edge of the upper die and is matched with the lower die, and the pushing piece is arranged at the male die of the upper die; the setting can further improve the effect of drawing of patterns like this, avoids tableware and last mould joint to influence the drawing of patterns.

The cooperation subassembly includes fifth spring, slip post and pusher, go up the mould open have with cooperation subassembly assorted first step chamber, slip post sliding seal locates first step intracavity, the pusher with slip post fixed connection stretches out first step chamber, the fifth spring with the slip post upper end is connected.

The pushing piece comprises a push rod, a positioning plate, a sixth spring and an annular air bag, a second step cavity is formed in the position, corresponding to the die cavity of the lower die, of the upper die, the positioning plate is arranged in the second step cavity in a sliding mode, the annular air bag is arranged between the positioning plate and the lower inner wall of the second step cavity, the sixth spring is arranged at the upper end of the positioning plate, the annular air bag is communicated with the first step cavity through a pipeline, and the pipeline opening of the first step cavity is located on the upper inner wall of the first step cavity.

The cooperation subassembly with still be equipped with delay assembly between the promotion subassembly, delay assembly includes slide bar, seventh spring and round pin head, it has the third step chamber in first step chamber of intercommunication and second step chamber to go up the mould, third step chamber with it is parallel to go up the mould, the slide bar slides and locates the third step intracavity, the seventh spring is located the slide bar with third step chamber is close to between the inner wall of second step chamber one side, the round pin head is located the slide bar is close to second step chamber one side, slide post side open have with slide bar assorted breach groove.

The pin head comprises an eighth spring and a T-shaped pin, the sliding rod is provided with a fourth step cavity, the T-shaped pin is arranged in the fourth step cavity in a sliding mode, the end portion of the T-shaped pin extends out, the eighth spring and one end, located in the fourth step cavity, of the T-shaped pin are connected, the vertical section of the positioning plate is of an I-shaped structure, and the lower side of the T-shaped pin in the vertical direction is provided with an inclined surface and matched with the positioning plate; therefore, the pushing of the tableware in the demoulding process can be delayed, and the influence on the tableware indentation is reduced.

Compared with the prior art, the invention has the following advantages:

by the arrangement of the demoulding mechanism, the tableware can be jacked and demoulded after injection molding of the tableware, so that the tableware can be more convenient for subsequent processing to meet the requirement, and the production convenience and smoothness are improved; the arrangement of the on-off component can further delay the jacking of the tableware demoulding, so that the phenomenon that the tableware is cooled and shrunk to be clamped on the upper mould to influence the demoulding due to the synchronous movement of the tableware along with the upper mould is avoided; the reverse pushing mechanism can actively push and demould the tableware clamped on the upper die, so that the effectiveness of demoulding is further improved; the delay assembly can delay pushing of the tableware which is not clamped with the upper die, so that indentation caused by large pushing pressure on the tableware is avoided, and the defective rate is reduced; through pure mechanical structure's drawing of patterns mode, compare in the drawing of patterns control of automatically controlled part, it need not artifical debugging and operation, at the control factor of moulding plastics originally under the prerequisite with great complexity for it is more convenient, swift, automatic to mould plastics the drawing of patterns, and pure mechanical structure part can reduce the frequency of overhauing and maintaining by a wide margin, and then reduces the number of times that whole equipment shut down and overhauld, improves the efficiency, the continuity and the convenience of production.

Drawings

The invention is further illustrated by the non-limiting examples given in the figures.

FIG. 1 is a schematic structural view of a tableware molding and demolding structure of the present invention.

FIG. 2 is a structural sectional view of a lower die of the present invention.

Fig. 3 is an enlarged schematic view of a point a in fig. 2.

Fig. 4 is a structural sectional view of another embodiment of the present invention.

Fig. 5 is an enlarged schematic view of B in fig. 4.

Fig. 6 is an enlarged schematic view at C in fig. 4.

Fig. 7 is a schematic structural view of an upper mold according to another embodiment of the present invention.

Fig. 8 is a structural sectional view of an upper mold in another embodiment of the present invention.

Fig. 9 is an enlarged schematic view at D in fig. 8.

Fig. 10 is a structural cross-sectional view of a second embodiment of an upper die of the present invention.

Fig. 11 is an enlarged schematic view at E in fig. 10.

The device comprises an upper die 1, an extrusion column 11, a telescopic head 12, a fourth spring 13, a second stepped hole 14, a lower die 2, a stripper plate 21, an assembly cavity 22, a guide pipe 23, a first telescopic column 3, a first piston 31, a first spring 32, a snap ring 33, a limit ring 34, a vertical cavity 35, an empty cylinder 4, a second telescopic column 41, a second piston 42, a second spring 43, a T-shaped on-off column 5, a third spring 51, a first stepped hole 52, a connecting hole 53, a fifth spring 6, a sliding column 61, a push head 62, a first stepped cavity 63, a notch groove 64, a push rod 7, a positioning plate 71, a sixth spring 72, an annular air bag 73, a second stepped cavity 74, a sliding rod 8, a seventh spring 81, a third stepped cavity 82, an eighth spring 9, a T-shaped pin 91, a fourth stepped cavity 92 and an inclined surface 93.

Detailed Description

In order that those skilled in the art can better understand the present invention, the following technical solutions are further described with reference to the accompanying drawings and examples.

The first embodiment is as follows:

as shown in fig. 1-3, a tableware forming and demoulding structure comprises an upper die 1 and a lower die 2, wherein the lower die 2 is fixedly connected with an external platform, the upper die 1 is connected with an external lifting mechanism, and a demoulding mechanism is arranged between the upper die 1 and the lower die 2;

the demoulding mechanism comprises a demoulding plate 21, an expansion component, a jacking component and an extrusion column 11, wherein the lower mould 2 is provided with an assembly cavity 22 matched with the demoulding plate 21, the demoulding plate 21 is arranged in the assembly cavity 22 in a sliding and sealing manner, the expansion component is arranged between the demoulding plate 21 and the lower inner wall of the assembly cavity 22, the jacking component is arranged on the side surface of the lower mould 2 and is connected with the expansion component through a guide pipe 23 embedded in the lower mould 2, and the extrusion column 11 is arranged on the upper mould 1 and is matched with the jacking component;

jacking subassembly includes first flexible post 3, first piston 31, first spring 32, snap ring 33 and spacing ring 34, lower mould 2 is opened there is perpendicular chamber 35, upside in perpendicular chamber 35 is located to snap ring 33, first flexible post 3 and snap ring 33 sliding seal are connected, first piston 31 and 3 lower extreme fixed connection of first flexible post, spacing ring 34 with erect chamber 35 inner wall fixed connection and be located between first piston 31 and the snap ring 33, spacing ring 34's inner circle diameter is less than the diameter of first flexible post 3, pipe 23 one end with erect chamber 35 intercommunication and be located between snap ring 33 and the spacing ring 34, first piston 31 lower extreme is located to first spring 32, the inflation subassembly intussuseption is filled with hydraulic oil.

When the injection molding processing of tableware is carried out, the lower die 2 is fixedly placed on a platform, the upper die 1 is connected with an external lifting mechanism to perform the action of opening and closing the die, meanwhile, the upper die 1 is communicated with an external feeding mechanism to inject materials, the upper die 1 and the lower die 2 are gradually closed during the processing, at the moment, the demolding mechanism gradually returns to the state of keeping the inside of the die cavity smooth, when the upper die 1 moves downwards, the extrusion column 11 gradually approaches until the extrusion column abuts against the first telescopic column 3 of the jacking component in the lower die 2, because the first telescopic column 3 is pushed by the first spring 32 through the first piston 31 in the initial state, the extrusion column keeps the outward extending state, and after being pushed by the extrusion column 11, the extrusion column gradually retracts into the vertical cavity 35 and extrudes the first spring 32, at the moment, because the first piston 31 is connected with the vertical cavity 35 in a sliding and sealing manner, the expansion assembly is communicated with the vertical cavity 35 through the guide pipe 23, so that negative pressure is generated in the moving process of the first piston 31 to suck hydraulic oil in the expansion assembly, the stripper plate 21 which is kept in an extending state due to being pushed by the hydraulic oil in a static state can be gradually withdrawn into the assembly cavity 22 until the upper die 1 and the lower die 2 are completely assembled, the pumped hydraulic oil is temporarily stored between the clamping ring 33 and the first piston 31 in the vertical cavity 35, and in order to further improve the sealing performance between the clamping ring 33 and the first telescopic column 3 and reduce the oil loss of the hydraulic oil, the first telescopic column 3 can be further sleeved with a rubber cover arranged between the first piston 31 and the clamping ring 33, so that the sealing protection effect can be achieved, and the motion action between the parts is not influenced;

after the upper die 1 and the lower die 2 are closed, injection molding feeding can be performed at the moment, the die is opened after tableware in the die cavity is cooled, when the upper die 1 moves upwards, the extrusion column 11 gradually breaks away from pushing the first telescopic column 3, correspondingly, the first spring 32 is reset to push the extrusion column, the first piston 31 also moves upwards to inject hydraulic oil in the vertical cavity 35 into the expansion chamber gradually through the guide pipe 23 again, until the extrusion column 11 completely breaks away from the butt joint with the first telescopic column 3, the expansion assembly can lift the demolding plate 21, and accordingly molded tableware in the die cavity of the lower die 2 is ejected and demolded, the limiting ring 34 is used for protecting the opening of the guide pipe 23 from being blocked by the first piston 31, normal and stable movement of the part can be ensured, the action is synchronous with the die opening of the upper die 1, no additional electric control part is needed to drive, on one hand, debugging operation required by setting the electric control part is reduced, the complexity of operation is reduced, on the other hand, the pure mechanical structure is realized, maintenance operation of the electric control part can be avoided, and the maintenance frequency is lower.

The expansion assembly comprises an empty cylinder 4, a second telescopic column 41, a second piston 42 and a second spring 43, the empty cylinder 4 is fixedly connected with the lower inner wall of the assembly cavity 22, the other end of the guide pipe 23 is communicated with the lower side of the empty cylinder 4, the second piston 42 is arranged in the empty cylinder 4 in a sliding sealing mode, the second telescopic column 41 is fixedly connected with the upper end of the second piston 42 and extends out of the empty cylinder 4 in a sliding mode to be fixedly connected with the lower end of the demoulding plate 21, the second spring 43 is sleeved on the second telescopic column 41 and is positioned in the empty cylinder 4, and the minimum telescopic pressure of the first spring 32 is larger than the maximum telescopic pressure of the second spring 43; under the static state, due to the effect of the first spring 32, hydraulic oil is kept between the second piston 42 and the lower inner wall of the hollow cylinder 4 all the time, so that the second telescopic column 41 is kept in the extending state, the hydraulic oil in the hollow cylinder 4 is sucked along with the downward movement of the first piston 31, at the moment, the second piston 42 can be pushed to move downward through the extension of the second spring 43 to achieve the effect of contracting the stripper plate 21, correspondingly, when the hydraulic oil is injected into the hollow cylinder 4 again, the second piston 42 is pushed again to push the second telescopic column 41 to extend, and the stripper plate 21 is jacked.

The vertical section of the stripper plate 21 is of a U-shaped structure with a downward opening; thus, while the tableware is effectively ejected and molded, the raw materials can be ensured not to enter the assembly cavity 22 in the injection molding stage, and the stripper plate 21 can also adopt other suitable structural shapes such as a U-shaped structure with a vertical section and a cylindrical structure.

The second embodiment:

as shown in fig. 4-6, in a further improvement of the first embodiment, the guide tube 23 is further provided with an on-off assembly, the on-off assembly comprises a T-shaped on-off post 5 and a third spring 51, the lower die 2 is provided with a first step hole 52 matched with the guide tube 23, the T-shaped on-off post 5 is slidably and hermetically arranged in the first step hole 52, the end part of the T-shaped on-off post extends out, the T-shaped on-off post 5 is provided with a communicating hole 53 matched with the guide tube 23, and the third spring 51 is arranged at the lower end of the T-shaped on-off post 5.

The extrusion column 11 is further provided with a protection piece, the protection piece comprises a telescopic head 12 and a fourth spring 13, the extrusion column 11 is provided with a second stepped hole 14, the telescopic head 12 is arranged in the second stepped hole 14 in a sliding mode, the end portion of the telescopic head extends out, the fourth spring 13 and one end, located in the second stepped hole 14, of the telescopic head 12 are connected, and the minimum telescopic pressure of the fourth spring 13 is larger than the maximum telescopic pressure of the first spring 32.

In order to avoid that the demoulding plate 21 is lifted synchronously at once when the upper die 1 is opened to cause the tableware to be synchronously attached to the upper die 1 to be ejected and contracted under the instantaneous cooling of outside cold air to be clamped on the male die of the upper die 1, a delay action is arranged on the demoulding plate 21 to avoid die clamping, when the upper die 1 and the lower die 2 are closed, the T-shaped on-off column 5 in the on-off assembly is extruded to be withdrawn into the first step hole 52, at the moment, the communicating hole 53 communicated with the guide pipe 23 on the T-shaped on-off column 5 in a static state moves downwards, so that the guide pipe 23 gradually staggers with the communicating hole 53 to cut off the passage of the guide pipe 23, at the moment, the first piston 31 cannot continuously suck hydraulic oil in the expansion assembly until the upper die 1 and the lower die 2 are completely closed, and the telescopic head 12 in the protective piece cannot continuously move downwards due to the first telescopic column 3 in the process, and is upwardly withdrawn into the second step hole 14 to form a supplementary stroke at one end, thereby ensuring that effective sealing can be completely realized between the upper die 1 and the lower die 2 and avoiding the abutting influence generated between the parts;

when the upper die 1 is opened, the T-shaped on-off column 5 is gradually moved upwards under the action of the third spring 51, but the passage of the guide pipe 23 is cut off in a die closing state, so that the communicating hole 53 on the T-shaped on-off column 5 is still not communicated with the guide pipe 23 when the upper die 1 is initially opened, the first telescopic column 3 cannot be upwards reset through the first spring 32 until the communicating hole 53 is communicated with the guide pipe 23 again along with the continuous movement of the upper die 1, and at the moment, hydraulic oil can be pushed by the first piston 31 to enter the expansion assembly again to achieve the effect of pushing the stripper plate 21, so that the phenomenon that the tableware is cooled and contracted and clamped on the male die of the upper die 1 due to the synchronous lifting of the stripper plate 21 when the upper die 1 is opened can be avoided, and the demolding smoothness is improved;

in order to ensure the stable movement of the components, the components such as the T-shaped on-off column 5 which need to keep a specified state are all connected with the corresponding cavities in a sliding mode through the guide ribs, so that the position state of the specific components is prevented from being changed due to rotation of the components, and the problem that the specific components can rotate can be directly avoided by adopting a rectangular structure.

Example three:

as shown in fig. 7-9, in a further improvement based on the first embodiment, the upper die 1 is further uniformly provided with a plurality of thrust reverser mechanisms, each thrust reverser mechanism comprises a matching component and a pushing component, the matching component is arranged on the side edge of the upper die 1 and matched with the lower die 2, and the pushing component is arranged on the male die of the upper die 1.

The cooperation subassembly includes fifth spring 6, slip post 61 and pusher 62, goes up mould 1 and opens and have the first step chamber 63 with cooperation subassembly assorted, and slip post 61 sliding seal locates in first step chamber 63, and pusher 62 and slip post 61 fixed connection stretch out first step chamber 63, and fifth spring 6 is connected with slip post 61 upper end.

The pushing piece comprises an ejector rod 7, a positioning plate 71, a sixth spring 72 and an annular air bag 73, a second step cavity 74 is formed in the position, corresponding to the die cavity of the lower die 2, of the upper die 1, the positioning plate 71 is arranged in the second step cavity 74 in a sliding mode, the annular air bag 73 is arranged between the positioning plate 71 and the lower inner wall of the second step cavity 74, the sixth spring 72 is arranged at the upper end of the positioning plate 71, the annular air bag 73 is communicated with the first step cavity 63 through a pipeline, and the pipeline opening of the first step cavity 63 is located on the upper inner wall of the first step cavity 63.

In order to further avoid blocked demoulding caused by clamping of the formed tableware and the upper die 1, a reverse pushing mechanism is arranged on the upper die 1 and can actively push the tableware when the upper die 1 is opened, when the upper die 1 and the lower die 2 are closed, a pushing head 62 in a matching assembly is blocked by the lower die 2 to drive a sliding column 61 to retract into a first step cavity 63, at the moment, a fifth spring 6 is extruded, air in the first step cavity 63 is extruded into an annular air bag 73 in a second step cavity 74 through a pipeline through the sliding column 61, at the moment, the annular air bag 73 is gradually expanded to further push a mandril 7 which moves downwards due to being pushed by a sixth spring 72, when the annular air bag 73 is expanded, a positioning plate 71 is upwards pushed to drive the mandril 7 to upwards move to retract a male die of the upper die 1 until the mandril 7 is attached to the upper die 1, at the moment, the closing of the upper die 1 and the lower die 2 is finished, and even if the mandril 7 has certain compressibility, the mandril is already contracted to be in a state matched with the attachment of the male die of the upper die 1, even if the annular air bag 73 is continuously injected, the influence of damage to the annular air bag can be caused;

after the tableware is injected and molded, the upper die 1 moves upwards at the moment, the fifth spring 6 in the matching assembly loses the blocking and extends downwards, and then the sliding column 61 is pushed to move downwards, the sliding column 61 moves to generate pumping action at the moment, and air in the annular air bag 73 can be pumped back into the first step cavity 63 through a pipeline, so that the positioning plate 71 loses the blocking of the annular air bag 73 and can move downwards through the sixth spring 72, and therefore pushing action on the tableware is generated through the ejector rod 7, and therefore in the die opening process, downward thrust can be exerted on the tableware actively, and accordingly blocking of tableware demolding is avoided.

Example four:

as shown in fig. 10-11, in a further improvement based on the third embodiment, a delay assembly is further disposed between the matching assembly and the pushing assembly, the delay assembly includes a slide bar 8, a seventh spring 81 and a pin head, the upper die 1 is provided with a third step cavity 82 communicating the first step cavity 63 and the second step cavity 74, the third step cavity 82 is parallel to the upper die 1, the slide bar 8 is slidably disposed in the third step cavity 82, the seventh spring 81 is disposed between the slide bar 8 and an inner wall of the third step cavity 82 near the second step cavity 74, the pin head is disposed at a side of the slide bar 8 near the second step cavity 74, and a notch 64 matched with the slide bar 8 is disposed at a side of the sliding column 61.

The pin head comprises an eighth spring 9 and a T-shaped pin 91, the sliding rod 8 is provided with a fourth step cavity 92, the T-shaped pin 91 is arranged in the fourth step cavity 92 in a sliding mode, the end portion of the T-shaped pin 91 extends out, the eighth spring 9 and one end, located in the fourth step cavity 92, of the T-shaped pin 91 are connected, the vertical section of the positioning plate 71 is of an I-shaped structure, and the lower side, in the vertical direction, of the T-shaped pin 91 is provided with an inclined surface 93 and matched with the positioning plate 71.

Similarly, in order to avoid the problem that after the mould is opened, part of the tableware is not clamped with the upper mould 1, but the tableware which is not completely solidified is indented due to the action of the push head 62, a delay assembly is further arranged to avoid the push head 62 directly extruding the tableware still in the lower mould 2 to generate defective products;

when the matching component is clamped on the upper die 1, the sliding column 61 moves to enable the notch groove 64 to move upwards, the sliding rod 8 in a static state is kept to move towards the sliding column 61 under the action of the seventh spring 81, and the sliding rod 8 in the static state is correspondingly abutted against the notch groove 64, so that when the notch groove 64 moves, the sliding column 61 pushes the sliding rod 8 to enable the sliding rod 8 to be retracted into the third step cavity 82, and meanwhile, the pin head also moves towards the side of the second step cavity 74 and extends into the second step cavity;

correspondingly, when the sliding column 61 moves, the positioning plate 71 also moves upwards, because the vertical section of the positioning plate 71 is in an i shape and the T-shaped pin 91 is provided with the inclined surface 93 facing the lower side, the positioning plate 71 moves upwards to push the T-shaped pin 91, so that the T-shaped pin 91 is retracted into the fourth step cavity 92 until the upper half structure of the positioning plate 71 passes, at this time, the eighth spring 9 pushes the T-shaped pin 91 to reset, through the i-shaped structure of the positioning plate 71, a limiting effect can be generated through the T-shaped pin 91, that is, when the sliding column 61 resets and sucks the annular air bag 73, the positioning plate 71 still cannot move downwards under the action of the sixth spring 72, until the notch 64 of the sliding column 61 corresponds to the sliding rod 8 again after the upper die 1 moves, the sliding rod 8 drives the pin head to retract into the third step cavity 82 through the pushing of the seventh spring 81, so that the blocking to the positioning plate 71 is cancelled, the notch is matched with the action of the sixth spring 72 to generate the pushing force of demolding, so that the upper die 1 leaves the lower die 2, on the other hand, the notch can be more beneficial to separating from the upper die 1, and the effect on the reduction of the indentation of the tableware is avoided, and the direct reduction of the indentation of the impact on the tableware;

in order to ensure the stable movement of the components, the components such as the sliding rod 8, the T-shaped pin 91, the pushing head 62 and the like which need to be kept in a specified state are all connected with the corresponding chambers in a sliding way through the guide ribs, so that the position state of the specific component is prevented from being changed due to the rotation of the components, and of course, the sliding rod 8 and the T-shaped pin 91 can also adopt a rectangular structure to directly avoid the problem that the sliding rod 8 and the T-shaped pin 91 can rotate.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Those skilled in the art can modify or change the above-described embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. The utility model provides a tableware shaping demoulding structure, includes mould and lower mould, lower mould and outside platform fixed connection, it is connected its characterized in that with outside elevating system to go up the mould: a demoulding mechanism is arranged between the upper die and the lower die;

the jacking subassembly includes first flexible post, first piston, first spring, snap ring and spacing ring, the lower mould is opened there is perpendicular chamber, the snap ring is located erect intracavity upside, first flexible post with snap ring sliding seal connects, first piston with first flexible post lower extreme fixed connection, the spacing ring with erect intracavity wall fixed connection and be located first piston with between the snap ring, the inner circle diameter of spacing ring is less than the diameter of first flexible post, pipe one end with erect the chamber intercommunication and be located the snap ring with between the spacing ring, first spring is located first piston lower extreme, the inflation subassembly intussuseption is filled with hydraulic oil.

2. The tableware molding releasing structure according to claim 1, wherein: the expansion assembly comprises an empty cylinder, a second telescopic column, a second piston and a second spring, the empty cylinder is fixedly connected with the lower inner wall of the assembly cavity, the other end of the conduit is communicated with the lower side of the empty cylinder, the second piston is arranged in the empty cylinder in a sliding sealing mode, the second telescopic column is fixedly connected with the upper end of the second piston and extends out of the empty cylinder in a sliding mode, the lower end of the stripping plate is fixedly connected with the lower end of the stripping plate, the second spring sleeve is arranged on the second telescopic column and located in the empty cylinder, and the minimum telescopic pressure of the first spring is larger than the maximum telescopic pressure of the second spring.

3. The tableware molding and demolding structure according to claim 2, wherein: the guide pipe is further provided with an on-off assembly, the on-off assembly comprises a T-shaped on-off column and a third spring, a first step hole matched with the guide pipe is formed in the lower die, the T-shaped on-off column is arranged in the first step hole in a sliding sealing mode, the end portion of the T-shaped on-off column extends out, a connecting through hole matched with the guide pipe is formed in the T-shaped on-off column, and the third spring is arranged at the lower end of the T-shaped on-off column.

4. The tableware molding and demolding structure as claimed in claim 3, wherein: the extrusion column is further provided with a protection piece, the protection piece comprises a telescopic head and a fourth spring, the extrusion column is provided with a second step hole, the telescopic head is arranged in the second step hole in a sliding mode, the end portion of the telescopic head extends out of the second step hole, the fourth spring is located at one end, in the second step hole, of the telescopic head and is connected, and the minimum telescopic pressure of the fourth spring is greater than the maximum telescopic pressure of the first spring.

5. The tableware molding releasing structure according to claim 4, wherein: the vertical section of the stripper plate is of a U-shaped structure with a downward opening.

6. The tableware molding releasing structure according to claim 5, wherein: the upper die is also uniformly provided with a plurality of reverse-pushing mechanisms, each reverse-pushing mechanism comprises a matching assembly and a pushing piece, the matching assembly is arranged on the side edge of the upper die and is matched with the lower die, and the pushing piece is arranged at the male die of the upper die.

7. The tableware molding releasing structure according to claim 6, wherein: the cooperation subassembly includes fifth spring, slip post and pusher, go up the mould open have with cooperation subassembly assorted first step chamber, slip post sliding seal locates first step intracavity, the pusher with slip post fixed connection stretches out first step chamber, the fifth spring with the slip post upper end is connected.

8. The tableware molding releasing structure according to claim 7, wherein: the pushing piece comprises a push rod, a positioning plate, a sixth spring and an annular air bag, a second step cavity is formed in the position, corresponding to the die cavity of the lower die, of the upper die, the positioning plate is arranged in the second step cavity in a sliding mode, the annular air bag is arranged between the positioning plate and the lower inner wall of the second step cavity, the sixth spring is arranged at the upper end of the positioning plate, the annular air bag is communicated with the first step cavity through a pipeline, and the pipeline opening of the first step cavity is located on the upper inner wall of the first step cavity.

9. The tableware molding releasing structure according to claim 8, wherein: the matching assembly and the pushing assembly are further provided with a delaying assembly, the delaying assembly comprises a sliding rod, a seventh spring and a pin head, the upper die is provided with a third step cavity communicated with the first step cavity and the second step cavity, the third step cavity is parallel to the upper die, the sliding rod is slidably arranged in the third step cavity, the seventh spring is arranged between the inner walls of one sides of the second step cavities, the pin head is arranged between the inner walls of one sides of the second step cavities, the sliding rod is close to one side of the second step cavities, and the side face of the sliding column is provided with a notch groove matched with the sliding rod.

10. The tableware molding releasing structure according to claim 9, wherein: the round pin head includes eighth spring and T shape round pin, the slide bar is opened there is the fourth step chamber, the T shape round pin slides and locates fourth step intracavity and tip stretch out, the eighth spring with the T shape round pin is located fourth step intracavity one end is connected, the vertical cross-section of locating plate is I-shaped structure, the downside of T shape round pin vertical direction open have the inclined plane and with the locating plate phase-match.