A mold structure capable of quick replacement and a method for replacing the same

Abstract

The application discloses a mold structure capable of realizing quick replacement, which comprises a pair of mold frames capable of relatively rotating and opening and closing around a first axis, each of the mold frames comprises a mold shell, a mold sleeve and a mold, and on the outer side of the mold and the inner side of the mold sleeve, the mold structure further comprises a positioning protrusion provided on one of them and a limiting recess provided on the other one, the positioning protrusion is used for being embedded in the limiting recess when the mold is closed; the limiting recess is longer than the positioning protrusion, the positioning protrusion is used for abutting against a second arc surface of the limiting recess near the first axis by a first arc surface of the positioning protrusion near the first axis when the mold is closed, the axis of the first arc surface and the second arc surface coincides with the first axis; and each of the mold frames further comprises a pressing mechanism provided on the mold sleeve and used for pressing the end of the mold away from the first axis so that the first arc surface and the second arc surface abut against each other. The mold structure can replace a pair of molds at the same time, and the replacement efficiency is high.

Description

Technical Field

[0001] This invention relates to the field of blow molding technology, and in particular to a mold structure that enables rapid replacement and a replacement method thereof. Background Technology

[0002] With the continuous development of the beverage industry, the requirements for mold changeover time on blow molding machines are becoming increasingly stringent. When the same blow molding machine blows different bottle shapes, the corresponding molds need to be changed. Currently, mold changeover on blow molding machines requires the use of other tools and necessitates the replacement of a pair of molds separately, resulting in lengthy changeover times and significantly impacting the working efficiency of the blow molding machine. Summary of the Invention

[0003] The purpose of this invention is to provide a mold structure and method that enables rapid mold replacement without the need for other tools, and to replace a pair of molds simultaneously, resulting in relatively high replacement efficiency.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] A quick-change mold structure includes a pair of mold frames that can rotate and open / close relative to each other about a first axis. Each mold frame includes a mold shell, a mold sleeve abutting against the inner side of the mold shell, and a mold detachably abutting against the inner side of the mold sleeve. The mold and the mold sleeve are connected by a corresponding arcuate groove and arcuate flange. The mold can rotate circumferentially relative to the mold sleeve. The mold structure further includes a positioning protrusion on one of the outer periphery of the mold and a limiting groove on the other of the inner periphery of the mold sleeve. The positioning protrusion is used to be embedded in the limiting groove when the mold is closed.

[0006] The limiting groove is longer than the positioning protrusion. The positioning protrusion is used to abut against the second arc surface of the limiting groove near the first axis line when the mold is closed, through its first arc surface near the first axis line. The axes of the first arc surface and the second arc surface coincide with each other and coincide with the first axis line.

[0007] Each of the mold frames also includes a clamping mechanism disposed on the mold sleeve for pressing the end of the mold away from the first axis line so that the first arc surface and the second arc surface abut against each other.

[0008] Preferably, the arcuate groove is recessed on the outer periphery of the mold, and the positioning protrusion is protruded in the arcuate groove; the arcuate flange is protruded on the inner periphery of the mold sleeve, and the limiting groove is recessed in the arcuate flange.

[0009] Preferably, the clamping mechanism includes a clamping block rotatably disposed on the mold sleeve about a second axis, a drive arm slidably disposed on the mold sleeve in a direction parallel to the first axis, and a driver disposed on the mold sleeve for driving the drive arm to slide.

[0010] Of the clamping block and the driving arm, the clamping mechanism further includes a driving shaft rotatable about its own axis and disposed on one of them, and a driving groove formed in the other of them, with the driving shaft passing through the driving groove.

[0011] More preferably, the clamping block has a limiting position and an unlocking position, the clamping block being used to switch between the limiting position and the unlocking position by rotating about the second axis:

[0012] When the clamping block is in the limited position, the clamping block is used to clamp the end of the mold away from the first axis line;

[0013] When the clamping block switches from the limiting position to the unlocking position, the clamping block rotates away from the mold and away from the first axis.

[0014] More preferably, the drive shaft is disposed on the clamping block, and the drive groove is formed in the drive arm.

[0015] More preferably, the groove direction of the drive groove intersects with the sliding direction of the drive arm.

[0016] More preferably, the clamping mechanism further includes a guide member disposed on the mold sleeve for guiding the drive arm.

[0017] More preferably, the second axis is perpendicular to the first axis.

[0018] Preferably, the pair of mold frames are arranged symmetrically about the mold closing center line.

[0019] A method for quickly changing a mold structure, achieved through the aforementioned mold structure, includes the following steps:

[0020] The clamping mechanism is activated to release the end of the mold that is away from the first axis line;

[0021] Rotate to open the pair of mold shells, the mold sleeve rotates away from the corresponding mold, causing the positioning protrusion and the corresponding limiting groove to disengage from each other;

[0022] Take out the pair of molds that are in the closed position;

[0023] The pair of molds to be replaced are fed into the pair of open mold shells, while keeping the height of the arc groove and the arc flange the same during the feeding process;

[0024] Rotate to close the pair of mold shells, causing the positioning protrusions to enter the corresponding limiting grooves;

[0025] The clamping mechanism is activated to clamp the end of the mold away from the first axis, so that the first arc surface and the corresponding second arc surface abut against each other.

[0026] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: The present invention can realize a quick-change mold structure and its replacement method. By setting positioning protrusions and limiting grooves on both the mold and the mold sleeve, the two surfaces used to abut against each other when the mold is closed are the first arc surface and the second arc surface, respectively, and the axes of the first arc surface and the second arc surface coincide with the first axis. With this setting, when it is necessary to change the mold, it is only necessary to drive the clamping mechanism to loosen the end of the mold away from the first axis, and then rotate to open the pair of mold shells. During the process of the mold shell carrying the mold sleeve rotating away from the mold, there is no interference between the first arc surface and the second arc surface, which can achieve effective separation of the two. The mold opening process is the separation process. Quick mold replacement can be achieved without the aid of other tools, and a pair of molds can be replaced at the same time, with relatively high replacement efficiency, thereby ensuring relatively high working efficiency of the blow molding machine. Attached Figure Description

[0027] Appendix Figure 1 This is a schematic diagram of the mold structure according to a specific embodiment of the present invention. Figure 1 (The clamping block is in the limit position);

[0028] Appendix Figure 2 This is a schematic diagram of the mold structure according to a specific embodiment of the present invention. Figure 2 (The clamping block is in the unlocked position);

[0029] Appendix Figure 3 This is a schematic diagram of the cross-sectional structure of the mold when it is closed.

[0030] Appendix Figure 4 This is a cross-sectional diagram of the mold structure during mold opening and replacement.

[0031] Appendix Figure 5 For the appendix Figure 1 A cross-sectional structural diagram of the positioning protrusion;

[0032] Appendix Figure 6 For the appendix Figure 1 A cross-sectional view of the clamping mechanism;

[0033] Appendix Figure 7 For the appendix Figure 2 A cross-sectional structural diagram of the positioning protrusion;

[0034] Appendix Figure 8 For the appendix Figure 2 A cross-sectional view of the clamping mechanism.

[0035] Wherein: 1. First axis; 2. Mold frame; 21. Mold shell;

[0036] 22. Mold sleeve; 221. Arc flange; 222. Limiting groove; 2221. Second arc surface;

[0037] 23. Mold; 231. Arc groove; 232. Positioning protrusion; 2321. First arc surface;

[0038] 24. Clamping mechanism; 241. Second axis; 242. Clamping block; 2421. Drive shaft; 243. Drive arm; 2431. Drive groove; 244. Driver; 245. Guide. Detailed Implementation

[0039] The technical solution of the present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0040] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the embodiments of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0041] In the description of the embodiments of the present invention, it should be understood that the terms "length", "inner", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of the present invention.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of the present invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0043] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0044] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0045] The following disclosure provides many different implementations or examples for carrying out different structures of the embodiments of the present invention. To simplify the disclosure of the embodiments of the present invention, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. Furthermore, reference numerals and / or reference letters may be repeated in different examples of the embodiments of the present invention; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.

[0046] See Figure 1-4 As shown, this embodiment provides a mold structure that enables quick replacement, including a pair of mold frames 2 that can rotate and open and close relative to each other around a first axis 1, wherein line AB is the mold closing center line, and the pair of mold frames 2 are symmetrically arranged relative to the mold closing center line.

[0047] Each mold frame 2 includes a mold shell 21, a mold sleeve 22 abutting against the inner side of the mold shell 21, and a mold 23 detachably abutting against the inner side of the mold sleeve 22. The mold shell 21, the mold sleeve 22 and the mold 23 are semi-circular arc-shaped columns. The mold 23 and the mold sleeve 22 are connected by a corresponding arc groove 231 and an arc flange 221. The mold 23 can rotate relative to the mold sleeve 22 in the circumferential direction through this connection.

[0048] In both the outer periphery of the mold 23 and the inner periphery of the mold sleeve 22, the mold structure also includes a positioning protrusion 232 protruding on one of them and a limiting groove 222 recessed on the other. The positioning protrusion 232 is used to be embedded in the limiting groove 222 when the mold is closed.

[0049] In this embodiment, the arc groove 231 is recessed on the outer periphery of the mold 23, and the positioning protrusion 232 protrudes in the arc groove 231; the arc flange 221 protrudes on the inner periphery of the mold sleeve 22, and the limiting groove 222 is recessed in the arc flange 221.

[0050] See Figure 3-4 As shown, the circumferential length of the limiting groove 222 is longer than the circumferential length of the positioning protrusion 232. The positioning protrusion 232 is used to abut against the second arcuate surface 2221 of the limiting groove 222 near the first axis line 1 during mold closing, through its first arcuate surface 2321. The axes of the first arcuate surface 2321 and the second arcuate surface 2221 coincide with each other and with the first axis line 1. Each mold frame 2 also includes a clamping mechanism 24 disposed on the mold sleeve 22 for pressing the end of the mold 23 away from the first axis line 1 so that the first arcuate surface 2321 and the second arcuate surface 2221 abut against each other.

[0051] With this setup, when mold 23 needs to be replaced, simply drive the clamping mechanism 24 to loosen the end of mold 23 away from the first axis 1, and then rotate to open the pair of mold shells 21. During the process of mold shells 21 rotating away from mold 23 along with mold sleeves 22, there will be no interference between the first arc surface 2321 and the second arc surface 2221, enabling effective separation. The mold opening process is the separation process. During the mold opening process, the rotation path of the second arc surface 2221 is located... Figure 3-4 On the CD line.

[0052] See Figure 1-2 As shown, the clamping mechanism 24 includes a clamping block 242 rotatably disposed on the mold sleeve 22 about a second axis 241, a drive arm 243 slidably disposed on the mold sleeve 22 in a direction parallel to the first axis 1, a driver 244 disposed on the mold sleeve 22 for driving the drive arm 243 to slide, and a guide member 245 disposed on the mold sleeve 22 for guiding the drive arm 243.

[0053] The clamping block 242 has a limited position and an unlocked position, and the clamping block 242 is used to switch between the limited position and the unlocked position by rotating about the second axis 241.

[0054] When the clamping block 242 is in the limit position, the clamping block 242 is used to clamp the end of the mold 23 away from the first axis line 1;

[0055] When the clamping block 242 switches from the limit position to the unlock position, the clamping block 242 rotates away from the mold 23 and away from the first axis line 1.

[0056] Of the clamping block 242 and the drive arm 243, the clamping mechanism 24 further includes a drive shaft 2421 rotatable about its own axis and mounted on one of them, and a drive groove 2431 formed in the other. The drive shaft 2421 passes through the drive groove 2431. The rotation axis of the drive shaft 2421 is parallel to the second axis 241, and both are arranged horizontally and perpendicular to the first axis 1 arranged vertically.

[0057] In this embodiment, the drive shaft 2421 is disposed on the clamping block 242, and the drive groove 2431 is formed on the upper part of the drive arm 243. The groove direction of the drive groove 2431 intersects with the sliding direction of the drive arm 243.

[0058] Through this setting:

[0059] When the mold is closed, the driver 244 drives the drive arm 243 to move downward. The drive arm 243 presses the drive shaft 2421 inward through the drive groove 2431, causing the clamping block 242 to rotate counterclockwise around the second axis 241 and block the mold 23 at the end away from the first axis 1, thereby clamping the mold 23.

[0060] When the mold is opened, the driver 244 drives the drive arm 243 to move upward. The drive arm 243 presses the drive shaft 2421 outward through the drive groove 2431, causing the clamping block 242 to rotate clockwise around the second axis 241 and move away from the mold 23 away from the end away from the first axis 1, thereby unlocking the mold 23.

[0061] A method for quickly changing a mold structure, achieved through the aforementioned mold structure, includes the following steps:

[0062] When the clamping mechanism 24 is activated, the driver 244 drives the drive arm 243 to move upward, and the clamping block 242 rotates clockwise around the second axis 241 to loosen the end of the mold 23 away from the first axis 1.

[0063] Drive a pair of mold shells 21 to rotate and open relative to each other, so that the mold sleeve 22 rotates away from the corresponding mold 23, and the positioning protrusion 232 and the corresponding limiting groove 222 disengage from each other without interference under the cooperation of the first arc surface 2321 and the second arc surface 2221;

[0064] A pair of molds 23 in a closed state are directly removed by an external robotic arm;

[0065] An external robotic arm sends a pair of molds 23 that are in the closed state to a pair of mold shells 21 that are in the open state. During the process of sending the molds 23, the height of the arc groove 231 and the arc flange 221 are kept the same (this can be achieved by setting the picking and placing height of the robotic arm, that is, the robotic arm only moves on a single axis).

[0066] Drive a pair of mold shells 21 to rotate relative to each other and close, so that the positioning protrusion 232 enters the corresponding limiting groove 222;

[0067] When the clamping mechanism 24 is activated, the driver 244 drives the drive arm 243 to move downward, and the clamping block 242 rotates counterclockwise around the second axis 241 to clamp the end of the mold 23 away from the first axis 1, so that the first arc surface 2321 and the corresponding second arc surface 2221 abut against each other.

[0068] This completes the quick replacement of a pair of molds 23 without the need for other tools. It also allows for the replacement of a pair of molds 23 simultaneously, resulting in relatively high replacement efficiency and thus ensuring relatively high working efficiency of the blow molding machine.

[0069] See Figure 5-8 As shown: Figure 5-6 In the middle, the clamping block 242 is in the limit position; Figure 7-8 In the middle, the clamping block 242 is in the unlocked position. When the clamping block 242 is in the unlocked position, the operator can manually drive the mold 23 to rotate relative to the mold sleeve 22 by an angle, so that the mold 23 can be directly removed, realizing the quick replacement of the mold 23.

[0070] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it. They should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A mold structure capable of quick replacement, comprising a pair of mold frames rotatably opening and closing about a first axis, each mold frame including a mold shell, a mold sleeve abutting against the inner side of the mold shell, and a mold detachably abutting against the inner side of the mold sleeve, the mold and the mold sleeve being connected by corresponding arcuate grooves and arcuate flanges, the mold being rotatable relative to the mold sleeve in a circumferential direction, characterized in that: In both the outer periphery of the mold and the inner periphery of the mold sleeve, the mold structure further includes a positioning protrusion protruding on one of them and a limiting groove recessed on the other. The positioning protrusion is used to be embedded in the limiting groove when the mold is closed. The limiting groove is longer than the positioning protrusion. The positioning protrusion is used to abut against the second arc surface of the limiting groove near the first axis line when the mold is closed, through its first arc surface near the first axis line. The axes of the first arc surface and the second arc surface coincide with each other and coincide with the first axis line. After the mold is closed, the end of the positioning protrusion away from the first axis line and the end of the limiting groove away from the first axis line are spaced apart. Each of the mold frames also includes a clamping mechanism disposed on the mold sleeve for pressing the end of the mold away from the first axis line so that the first arc surface and the second arc surface abut against each other.

2. The mold structure capable of quick replacement according to claim 1, characterized in that: The arc groove is recessed on the outer periphery of the mold, and the positioning protrusion is protruded in the arc groove; the arc flange is protruded on the inner periphery of the mold sleeve, and the limiting groove is recessed in the arc flange.

3. The mold structure capable of quick replacement according to claim 1, characterized in that: The clamping mechanism includes a clamping block rotatably disposed on the mold sleeve about a second axis, a drive arm slidably disposed on the mold sleeve in a direction parallel to the first axis, and a driver disposed on the mold sleeve for driving the drive arm to slide. Of the clamping block and the driving arm, the clamping mechanism further includes a driving shaft rotatable about its own axis and disposed on one of them, and a driving groove formed in the other of them, with the driving shaft passing through the driving groove.

4. The mold structure capable of quick replacement according to claim 3, characterized in that: The clamping block has a limiting position and an unlocking position, and the clamping block is used to switch between the limiting position and the unlocking position by rotating about the second axis: When the clamping block is in the limited position, the clamping block is used to clamp the end of the mold away from the first axis line; When the clamping block switches from the limiting position to the unlocking position, the clamping block rotates away from the mold and away from the first axis.

5. The mold structure capable of quick replacement according to claim 3, characterized in that: The drive shaft is mounted on the clamping block, and the drive groove is formed in the drive arm.

6. The mold structure capable of quick replacement according to claim 3, characterized in that: The groove direction of the drive groove intersects with the sliding direction of the drive arm.

7. The mold structure capable of quick replacement according to claim 3, characterized in that: The clamping mechanism also includes a guide member disposed on the mold and used to guide the drive arm.

8. The mold structure capable of quick replacement according to claim 3, characterized in that: The second axis is perpendicular to the first axis.

9. The mold structure capable of quick replacement according to claim 1, characterized in that: The pair of mold frames are symmetrically arranged relative to the mold closing center line.

10. A method for changing a mold structure that enables rapid replacement, implemented using any one of claims 1-9, characterized in that: Includes the following steps: The clamping mechanism is activated to release the end of the mold that is away from the first axis line; Rotate to open the pair of mold shells, the mold sleeve rotates away from the corresponding mold, causing the positioning protrusion and the corresponding limiting groove to disengage from each other; Take out the pair of molds that are in the closed position; The pair of molds to be replaced are fed into the pair of open mold shells, while keeping the height of the arc groove and the arc flange the same during the feeding process; Rotate to close the pair of mold shells, causing the positioning protrusions to enter the corresponding limiting grooves; The clamping mechanism is activated to clamp the end of the mold away from the first axis, so that the first arc surface and the corresponding second arc surface abut against each other.

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