High-capacity o-ring production mold

Abstract

The present application relates to a kind of high-capacity O-ring production mould, for forming the die piece with O-ring, the forming mould includes first die set and second die set.The die closing surface of first die set is concavely provided with die cavity, first blocking ring is convexly provided in die cavity, and first blocking ring circumscribes piece cavity for forming die piece in die cavity, and multiple first forming parts are convexly provided in piece cavity, and each first forming part includes multiple first ring cavity.The die closing surface of second die set is convexly provided with multiple second forming parts, and each second forming part includes multiple second ring cavity.Each first ring cavity and second ring cavity correspond one by one, and corresponding first ring cavity and second ring cavity are configured to form an O-ring on die piece.Multiple pairs of first ring cavity and second ring cavity can form multiple O-rings, so that each first forming part and second forming part can press multiple O-rings on die piece, and O-rings on die piece can be obtained after die piece is punched, and the output rate of O-ring is improved.

Description

Technical Field

[0001] This invention relates to the field of production technology, and in particular to a high-capacity O-ring production mold. Background Technology

[0002] An O-ring is a rubber sealing ring with a circular cross-section. O-rings are the most common sealing components, possessing strong pressure resistance and capable of withstanding pressures of tens of megapascals. O-ring molds are tools used to manufacture O-rings, fixing their shape. O-rings can be injection molded or compression molded, with the equipment and processes used for injection molding and compression molding differing.

[0003] O-ring compression molding molds consist of an upper mold plate and a lower mold plate, each with a corresponding annular cavity with a semi-circular cross-section. During compression molding, the mold is opened, and the rubber material for making the O-ring is clamped between the upper and lower mold plates. Then, the mold is closed, heated to the process molding temperature, and held at that temperature and pressure for a certain period of time, allowing the rubber within the cavity to vulcanize and form the O-ring. However, in related technologies, the space available for molding O-rings is relatively small, and each molding structure can only produce one O-ring, resulting in a low O-ring yield, wasted raw materials, and increased production costs. Summary of the Invention

[0004] The purpose of this invention is to provide a high-capacity O-ring production mold to improve the output rate of O-rings and reduce production costs.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution.

[0006] According to one aspect of the present invention, a high-capacity O-ring production mold is provided for molding a mold piece with an O-ring. The production mold includes: a first module, wherein a mold cavity is recessed on the mold mating surface of the first module, and a first retaining ring is protruding within the mold cavity, the first retaining ring enclosing a piece cavity for molding the mold piece within the mold cavity, and a plurality of first forming portions protruding within the piece cavity, each first forming portion including a plurality of first annular cavities; and a second module, wherein a plurality of second forming portions are protruding on the mold mating surface of the second module, each second forming portion including a plurality of second annular cavities; wherein the first annular cavities and the second annular cavities correspond one-to-one, and a corresponding first annular cavity and a corresponding second annular cavity are configured to mold an O-ring on the mold piece.

[0007] In some embodiments of this application, each first molding part includes multiple sets of first molding rings protruding from the cavity of the sheet, each set of first molding rings includes two first molding rings arranged coaxially inside and outside, and the first ring cavity is formed between the two first molding rings; each second molding part includes multiple sets of second molding rings protruding from the mold mating surface of the second module, each set of second molding rings includes two second molding rings arranged coaxially inside and outside, and the second ring cavity is formed between the two second molding rings.

[0008] In some embodiments of this application, both the first molding ring and the second molding ring are pointed.

[0009] In some embodiments of this application, the first molding ring group has two sets: a first inner ring group and a first outer ring group. The first inner ring group includes two first inner rings arranged coaxially, forming a first inner ring cavity between the two first inner rings. The first outer ring group includes two first outer rings arranged coaxially, forming a first outer ring cavity between the two first outer rings. The second molding ring group has two sets: a second inner ring group and a second outer ring group. The second inner ring group includes two second inner rings arranged coaxially, forming a second inner ring cavity between the two second inner rings. The second outer ring group includes two second outer rings arranged coaxially, forming a second outer ring cavity between the two second outer rings. The first inner ring cavity and the second inner ring cavity are configured to form an O-ring on the mold, and the first outer ring cavity and the second outer ring cavity are configured to form another O-ring on the mold.

[0010] In some embodiments of this application, the sheet cavity is recessed with a plurality of interconnected first cavities, and the first molding part is correspondingly protruded into the first cavity;

[0011] The second module has a plurality of interconnected second cavities recessed on its mold-closing surface, and the second molding part is protruding from each of the second cavities in a corresponding manner.

[0012] In some embodiments of this application, the first cavity includes an extrusion groove located in the innermost first forming ring group, and the second cavity has an extrusion portion protruding in the innermost second forming ring group; or, the first cavity has an extrusion portion protruding in the innermost first forming ring group, and the second cavity includes an extrusion groove located in the innermost second forming ring group.

[0013] In some embodiments of this application, a second retaining ring is further protruding inside the mold cavity. The second retaining ring is located outside the first retaining ring and forms an internal overflow groove between it and the first retaining ring. An external overflow groove is also formed outside the second retaining ring in the first mold cavity.

[0014] In some embodiments of this application, the internal overflow trough includes a communicating internal overflow channel and an internal overflow area. The internal overflow channel is close to the first retaining ring, the internal overflow area is close to the second retaining ring, and the depth of the internal overflow channel is greater than the depth of the internal overflow area.

[0015] In some embodiments of this application, the second retaining ring has multiple notches that connect the internal overflow groove and the external overflow groove; the first retaining ring and the second retaining ring have the same shape, and the multiple notches are respectively located at the connection of each adjacent inner sidewall of the second retaining ring.

[0016] In some embodiments of this application, a plurality of first retaining rings and second retaining rings are provided side by side at intervals, and a plurality of spacers are also provided in each of the first retaining rings in the mold cavity. The first retaining rings and the plurality of spacers enclose a plurality of sheet cavities for forming the mold sheet in the first mold cavity, and the external overflow groove surrounds the plurality of second retaining rings.

[0017] As can be seen from the above technical solutions, the embodiments of the present invention have at least the following advantages and positive effects:

[0018] In the production mold of this invention, each first forming part includes multiple first annular cavities, and each second forming part includes multiple second annular cavities. The first and second annular cavities correspond one-to-one. Each pair of first and second annular cavities can press an O-ring onto the mold sheet. Multiple pairs of first and second annular cavities can form multiple O-rings. Therefore, each first and second forming part can press multiple O-rings onto the mold sheet. The O-rings on the mold sheet can be obtained by stamping the mold sheet, which improves the O-ring yield, makes full use of the raw materials, and reduces production costs. Furthermore, when the adhesive flows faster in one direction under pressure, the first retaining ring can be used to block the flow of adhesive in that direction, allowing the adhesive to diffuse more evenly within the cavity. This allows for more complete and uniform filling of the first and second annular cavities, ensuring a high yield of O-rings. Attached Figure Description

[0019] Figure 1 This is a structural diagram of the module.

[0020] Figure 2 This is a structural diagram illustrating the mold and overflow material.

[0021] Figure 3 This is a structural diagram of the first module of a production mold according to an embodiment of the present invention.

[0022] Figure 4 yes Figure 3 An enlarged schematic diagram of region A in the middle.

[0023] Figure 5This is a structural diagram of the second module of a production mold according to an embodiment of the present invention.

[0024] Figure 6 yes Figure 5 Enlarged schematic diagram of region B in the middle.

[0025] Figure 7 This is a structural diagram of the first module of the production mold according to another embodiment of the present invention.

[0026] Figure 8 This is a structural diagram of the second module of the production mold according to another embodiment of the present invention.

[0027] The reference numerals in the attached drawings are explained as follows: 1. First module; 10. First cavity; 100. Extrusion groove; 11. First retaining ring; 110. Sheet cavity; 12. First inner ring; 120. First inner ring cavity; 13. First outer ring; 130. First outer ring cavity; 141. First rib; 142. Second rib; 143. Fixing groove; 15. Second retaining ring; 150. Internal overflow groove; 1501. Internal overflow channel; 1502. Internal overflow area; 151. Notch; 1 60. External overflow channel; 170. Discharge channel; 1701. First channel section; 1702. Second channel section; 1703. Third channel section; 181. Spacer bar; 182. Stop bar; 19. First positioning block; 2. Second module; 20. Second cavity; 200. Extrusion section; 21. Second inner ring; 210. Second inner ring cavity; 22. Second outer ring; 220. Second outer ring cavity; 23. Second positioning block; 3. Die piece; 31. O-ring; 4. Overflow diagram. Detailed Implementation

[0028] Although the invention can be readily embodied in various forms, only some specific embodiments are shown in the accompanying drawings and will be described in detail in this specification. It is understood that this specification should be regarded as an exemplary illustration of the principles of the invention and is not intended to limit the invention to what is described herein.

[0029] Therefore, a feature pointed out in this specification is used to illustrate one feature of one embodiment of the invention, and does not imply that every embodiment of the invention must have the described feature. Furthermore, it should be noted that this specification describes many features. While certain features may be combined to illustrate possible system designs, these features may also be used in other combinations not explicitly stated. Therefore, unless otherwise stated, the described combinations are not intended to be limiting.

[0030] In the embodiments shown in the accompanying drawings, the directional indications (such as up, down, left, right, front, and back) used to explain the structure and movement of the various elements of the invention are relative rather than absolute. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the descriptions of the positions of these elements change, these directional indications also change accordingly.

[0031] The preferred embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0032] The production mold provided in one embodiment of the present invention is mainly used for molding a mold piece 3 with an O-ring 31. Figure 1 A structural diagram of module 3 is shown. Figure 2 The diagram shows the structure of mold plate 3 and overflow diagram 4. The forming principle of the production mold is explained in detail below.

[0033] Please see Figures 3 to 6 The production mold includes a first module 1 and a second module 2. The first module 1 has a recessed mold cavity on its mating surface, and a first retaining ring 11 protrudes from the mold cavity. The first retaining ring 11 encloses a sheet cavity 110 within the mold cavity for forming the mold piece 3. Multiple first forming parts protrude from the sheet cavity 110, each first forming part including multiple first annular cavities. The second module 2 has multiple second forming parts protruding from its mating surface, each second forming part including multiple second annular cavities. The first annular cavities and second annular cavities correspond one-to-one, and a corresponding first annular cavity and second annular cavity are configured to form an O-ring 31 on the mold piece 3.

[0034] The adhesive material is placed between the first module 1 and the second module 2. The first module 1 and the second module 2 are then closed to extrude and mold the adhesive material. The adhesive material flows and fills the sheet cavity 110 and the first annular cavity of the first module 1, while simultaneously filling the second annular cavity of the second module 2, forming a mold piece 3 with multiple O-rings 31. The mold piece 3 is then stamped to obtain the O-rings 31 on it, which improves the yield of O-rings 31, makes full use of the raw materials, and reduces production costs.

[0035] It should be noted that in order to ensure that the adhesive is fully filled, the amount of adhesive needs to be greater than the amount required to fill. When the adhesive is under pressure, the adhesive may flow faster in a certain direction. At this time, the first retaining ring 11 is used to block the flow of adhesive in that direction, so that the adhesive can be more evenly diffused in the sheet cavity 110, thereby filling the first ring cavity and the second ring cavity more fully and evenly, ensuring the yield of O-ring 31.

[0036] In some embodiments, each first molding portion includes multiple sets of first molding rings protruding from the cavity 110, each set of first molding rings including two first molding rings arranged coaxially inside and outside, with a first annular cavity formed between the two first molding rings. Each second molding portion includes multiple sets of second molding rings protruding from the mold-closing surface of the second module 2, each set of second molding rings including two second molding rings arranged coaxially inside and outside, with a second annular cavity formed between the two second molding rings.

[0037] In some embodiments, the first molding ring group comprises two sets: a first inner ring group and a first outer ring group. The first inner ring group includes two coaxially arranged first inner rings 12, forming a first inner ring cavity 120 between the two first inner rings 12. The first outer ring group includes two coaxially arranged first outer rings 13, forming a first outer ring cavity 130 between the two first outer rings 13. The second molding ring group comprises two sets: a second inner ring group and a second outer ring group. The second inner ring group includes two coaxially arranged second inner rings 21, forming a second inner ring cavity 210 between the two second inner rings 21. The second outer ring group includes two coaxially arranged second outer rings 22, forming a second outer ring cavity 220 between the two second outer rings 22. The first inner ring cavity 120 and the second inner ring cavity 210 are configured to form an O-ring on the mold 3, and the first outer ring cavity 130 and the second outer ring cavity 220 are configured to form another O-ring on the mold 3. In other embodiments, the first molding ring group may also have more than two sets.

[0038] In some embodiments, the first inner ring 12, the first outer ring 13, the second inner ring 21, and the second outer ring 22 are all pointed, that is, the first forming ring in the first forming ring group and the second forming ring in the second forming ring group are all pointed, thereby reducing the connection strength of the O-ring 31 on the mold plate 3 and making it easier to remove the O-ring 31 from the mold plate 3.

[0039] In some embodiments, the first inner ring 12 and the first outer ring 13 are arranged coaxially, and the second inner ring 21 and the second outer ring 22 are arranged coaxially, so that the packing at each of the first inner ring cavity 120, the first outer ring cavity 130, the second inner ring cavity 210 and the second outer ring cavity 220 is more uniform.

[0040] In some embodiments, the cavity 110 is recessed with a plurality of interconnected first cavities 10, and the first molding portions are correspondingly protruded from the first cavities 10. The mold-closing surface of the second module 2 is recessed with a plurality of interconnected second cavities 20, and the second molding portions are correspondingly protruded from the second cavities 20. When the mold is closed and the rubber material is extruded, the rubber material can flow into each of the first cavities 10 and each of the second cavities 20, that is, more rubber material can accumulate around the first molding portions and the second molding portions, so as to ensure that the first inner ring cavity 120, the first outer ring cavity 130, the second inner ring cavity 210 and the second outer ring cavity 220 can be filled with sufficient rubber material, and avoid the O-rings 31 from having poor appearance or poor dimensions.

[0041] In some embodiments, the first cavity 10 includes an extrusion groove 100 located within the first inner ring 12, and the second cavity 20 has an extrusion portion 200 protruding within the second inner ring 21. During mold closing, the extrusion portion 200 can extrude the adhesive material within the extrusion groove 100 outwards, causing the adhesive material to flow into the first inner ring cavity 120, the first outer ring cavity 130, the second inner ring cavity 210, and the second outer ring cavity 220. In other embodiments, the first cavity 10 may have an extrusion portion 200 protruding within the first inner ring 12, and the second cavity 20 may include an extrusion groove 100 located within the second inner ring 212.

[0042] In some embodiments, a plurality of first cavities 10 are arranged in an array to form a first cavity array, which includes multiple rows of first cavity rows and multiple columns of first cavity columns. Similarly, a plurality of second cavities 20 are arranged in an array to form a second cavity array, which includes multiple rows of second cavity rows and multiple columns of second cavity columns. The orderly arrangement of the first and second cavity arrays allows for the arrangement of more first molding portions and second molding portions on the first module 1 and the second module 2, thereby enabling the molding of more O-rings 31 on the mold piece 3 and further improving material utilization.

[0043] In some embodiments, the cavity 110 is provided with a plurality of protruding ribs, which form grooves on the die 3. These grooves allow the die 3 to be positioned during stamping, facilitating accurate stamping of the O-rings 31 on the die 3. The ribs may include first ribs 141 and second ribs 142. The plurality of first ribs 141 are located between two adjacent rows of first cavities and two adjacent columns of first cavities, respectively. The plurality of second ribs 142 are distributed at intervals around the first cavity array. The first ribs 141 and second ribs 142 form first and second grooves on the die 3, respectively. The cooperation of the first and second grooves provides more stable positioning of the die 3. The cavity 110 may also have a plurality of recessed fixing grooves 143, with at least one fixing groove 143 distributed on each of the four sides of the rectangular first cavity column. The fixing grooves 143 form fixing posts on the die 3, which cooperate with the first and second grooves to more stably position the die 3.

[0044] In some embodiments, a second retaining ring 15 is also protruding within the mold cavity. The second retaining ring 15 is located outside the first retaining ring 11, and an internal overflow groove 150 is formed between the second retaining ring 11 and the first retaining ring 11. An external overflow groove 160 is also formed outside the mold cavity outside the second retaining ring 15. After the adhesive overflowing from the first retaining ring 11 flows into the internal overflow groove 150, the second retaining ring 15 further prevents the adhesive from flowing too quickly in a certain direction, allowing the adhesive to fill the first inner ring cavity 120, the first outer ring cavity 130, the second inner ring cavity 210, and the second outer ring cavity 220 more fully and evenly. The adhesive overflowing from the internal overflow groove 150 passes over the second retaining ring 15 and enters the external overflow groove 160, where it is further blocked by the sidewall of the external overflow groove 160, further preventing the adhesive from flowing too quickly in a certain direction.

[0045] In some embodiments, the internal overflow groove 150 includes an internal overflow channel 1501 and an internal overflow area 1502 that are connected. The internal overflow channel 1501 is close to the first retaining ring 11, and the internal overflow area 1502 is close to the second retaining ring 15. The depth of the internal overflow channel 1501 is greater than the depth of the internal overflow area 1502. This not only allows the sidewall of the internal overflow channel 1501 to further prevent the rubber material from flowing too fast in a certain direction, but also, it is worth mentioning that, when the mold is closed, the air between the first module 1 and the second module 2 and the air squeezed out of the rubber material will be located in the upper layer of the rubber material. The rubber material overflowing from the first retaining ring 11 will flow into the internal overflow channel 1501, and the air can be smoothly discharged from the internal overflow area 1502 to avoid air bubbles in the O-ring 31.

[0046] In some embodiments, the second retaining ring 15 has a plurality of notches 151 that communicate with the external overflow groove 160. When the mold is closed, the air between the first module 1 and the second module 2 and the air squeezed out of the rubber material can be discharged outward through the notches 151 to avoid air remaining in the O-ring 31.

[0047] In some embodiments, both the first retaining ring 11 and the second retaining ring 15 are rectangular, and four notches 151 are provided, respectively located at the four corners of the rectangular second retaining ring 15. Since the rubber material used for pressing is typically cut into strips, these strips are placed on the mold-closing surface of the first module 1 before mold closing. Their length direction is approximately parallel to the long side of the rectangular cavity 110, and the rubber material is located in the middle of the cavity 110, with a rectangular horizontal cross-section. When the rubber material is pressed, it flows faster in the forward, backward, left, and right directions, and slower towards the corners. Therefore, the notches 151 are located at the corners to ensure that the faster-flowing rubber material is blocked by the second retaining ring 15 and flows out from the corners. It can be understood that the four corners of the rectangular second retaining ring 15 are the connection points of each pair of adjacent inner sidewalls of the four inner sidewalls of the rectangular second retaining ring 15. In some other embodiments, the first retaining ring 11 and the second retaining ring 15 may also be other polygonal shapes, with multiple notches 151 located at the junctions of adjacent inner sidewalls of the first retaining ring 11 and the second retaining ring 15. In this case, an adhesive with a corresponding polygonal cross-section can be used. When the first retaining ring 11 and the second retaining ring 15 are polygonal, each of their inner sidewalls is planar. However, in some other embodiments, the first retaining ring 11 and the second retaining ring 15 may also be irregular shapes with arc-shaped inner sidewalls. Multiple notches 151 are also located at the junctions of adjacent inner sidewalls of the first retaining ring 11 and the second retaining ring 15. In this case, an adhesive with a corresponding irregular cross-section can be used.

[0048] In some embodiments, the external overflow channel 160 is rectangular and has two opposing side channels. The mold cavity includes two rows of material channels 170, one end of which is connected to the middle of the two side channels, and the ends of the two rows of material channels 170 away from the side channels are open. The material flowing out from the notches 151 at the four corners of the second retaining ring 15 needs to flow a longer distance to reach the middle of the side channels of the external overflow channel 160, so that the sidewalls of the external overflow channel 160 can effectively block the flow.

[0049] In some embodiments, the discharge trough 170 includes a first trough segment 1701, a second trough segment 1702, and a third trough segment 1703. One end of the first trough segment 1701 is connected to the middle of the side trough. The second trough segment 1702 is connected to the end of the first trough segment 1701 away from the side trough. Two third trough segments 1703 are provided and are located on both sides of the first trough segment 1701, respectively. One end of each of the two third trough segments 1703 is connected to both ends of the second trough segment 1702, and the ends of the two third trough segments 1703 away from the second trough segment 1702 are open. The first trough segment 1701, the second trough segment 1702, and the third trough segment 1703 avoid the installation position of the first positioning block 19, making the layout of the first module 1 more compact.

[0050] Please see Figure 7 and Figure 8 In some embodiments, multiple first retaining rings 11 and second retaining rings 15 are arranged side-by-side at intervals on the first module 1. Multiple spacers 181 protrude from each first retaining ring 11 within the mold cavity. The first retaining rings 11 and the multiple spacers 181 enclose multiple sheet cavities 110 for molding the mold piece 3 within the mold cavity. An external overflow groove 160 surrounds the multiple second retaining rings 15. Correspondingly, the number of second cavity arrays on the first module 1 corresponds one-to-one with the number of sheet cavities 110. Thus, multiple mold pieces 3 with O-cavities can be produced in a single mold closing operation, improving production efficiency.

[0051] In some embodiments, a plurality of baffles 182 are also provided in the outer overflow groove 160. The baffles 182 are distributed one-to-one between adjacent second baffle rings 15. The baffles 182 are used to block the faster flow rate of the adhesive material, so that the sheet cavity 110 in each first baffle ring 11 can be filled more evenly.

[0052] In some embodiments, the first module 1 has a plurality of first mounting grooves recessed on its mold-closing surface. The first module 1 also includes a plurality of first positioning blocks 19, each of which is detachably disposed in a first mounting groove, and there is an adjustment gap between the first mounting groove and the first positioning block 19. The second module 2 has a plurality of second mounting grooves recessed on its mold-closing surface. The second module 2 also includes a plurality of second positioning blocks 23, each of which is detachably disposed in a second mounting groove, and there is an adjustment gap between the second mounting groove and the second positioning block 23. One of the first positioning block 19 and the second positioning block 23 has a protruding positioning post, and the other has a recessed positioning groove. Positioning is performed during mold closing using the positioning post and the positioning groove, and the installation position of the first positioning block 19 and the second positioning block 23 can be adjusted using the adjustment gap. In the figure, there are four first positioning blocks 19, located at the center of the four sides of the first module 1, and four second positioning blocks 23, located at the center of the four sides of the second module 2, but the number and position of the first positioning blocks 19 and the second positioning blocks 23 are not limited thereto.

[0053] In some embodiments, the second module 2 is also engraved with a stamp and a serial number. The stamp is used to identify the model of the two types of O-rings 31. The serial number is used to identify the number of O-rings 31.

[0054] Based on the above technical solutions, the embodiments of the present invention have at least the following advantages and positive effects.

[0055] In the production mold of this invention, each first molding part includes multiple first annular cavities, and each second molding part includes multiple second annular cavities. The first and second annular cavities correspond one-to-one. Each pair of first and second annular cavities can press out an O-ring 31 on the mold plate 3. Multiple pairs of first and second annular cavities can form multiple O-rings 31. Therefore, each first molding part and second molding part can press out multiple O-rings 31 on the mold plate 3. The O-rings 31 on the mold plate 3 can be obtained by stamping the mold plate 3, which improves the yield of O-rings 31, makes full use of the raw materials, and reduces production costs. Furthermore, when the adhesive flows faster in one direction under pressure, the first retaining ring 11 can be used to block the flow of adhesive in that direction, so that the adhesive diffuses more evenly in the cavity 110, thereby filling the first and second annular cavities more fully and evenly, ensuring the yield of O-rings 31.

[0056] Although the invention has been described with reference to several typical embodiments, it should be understood that the terminology used is illustrative and exemplary, and not restrictive. Since the invention can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A high-capacity O-ring production mold for forming mold pieces with O-rings, characterized in that, include: The first module has a mold cavity recessed on its molding surface. A first retaining ring protrudes from the mold cavity and surrounds a sheet cavity for forming the mold piece within the mold cavity. Multiple first forming parts protrude from the sheet cavity, and each first forming part includes multiple first ring cavities. The second module has a plurality of second molding parts protruding from its mold mating surface, and each second molding part includes a plurality of second annular cavities. Wherein, the first annular cavity and the second annular cavity correspond one to one, and the corresponding first annular cavity and the corresponding second annular cavity are configured to form an O-ring on the mold; The mold cavity is further provided with a second retaining ring, which is located outside the first retaining ring and forms an internal overflow groove between the second retaining ring and the first retaining ring. The first mold cavity is also provided with an external overflow groove outside the second retaining ring. The internal overflow groove includes an internal overflow channel and an internal overflow area that are connected. The internal overflow channel is close to the first retaining ring, and the internal overflow area is close to the second retaining ring. The depth of the internal overflow channel is greater than the depth of the internal overflow area. The second retaining ring is provided with a plurality of notches that connect the internal overflow groove and the external overflow groove. The mold cavity includes a discharge groove, and the external overflow groove has a side groove. One end of the discharge groove is connected to the middle of the side groove, and the end of the discharge groove away from the side groove is open. The discharge groove includes a first groove segment, a second groove segment, and a third groove segment. One end of the first groove segment is connected to the middle of the side groove, the second groove segment is connected to the end of the first groove segment away from the side groove, the third groove segment is located on the side of the first groove segment, one end of the third groove segment is connected to the end of the second groove segment, and the end of the third groove segment away from the second groove segment is open.

2. The production mold as described in claim 1, characterized in that, Each of the first molding portions includes multiple sets of first molding rings protruding into the plate cavity. Each set of first molding rings includes two first molding rings arranged coaxially inside and outside the plate cavity. The first ring cavity is formed between the two first molding rings. Each of the second molding portions includes multiple sets of second molding rings protruding from the mold mating surface of the second module. Each set of second molding rings includes two second molding rings arranged coaxially inside and outside, and the second ring cavity is formed between the two second molding rings.

3. The production mold as described in claim 2, characterized in that, Both the first forming ring and the second forming ring are pointed.

4. The production mold as described in claim 2, characterized in that, The first forming ring group has two sets, namely a first inner ring group and a first outer ring group. The first inner ring group includes two first inner rings arranged coaxially, and a first inner ring cavity is formed between the two first inner rings. The first outer ring group includes two first outer rings arranged coaxially, and a first outer ring cavity is formed between the two first outer rings. The second forming ring group has two sets, namely a second inner ring group and a second outer ring group. The second inner ring group includes two second inner rings arranged coaxially, and a second inner ring cavity is formed between the two second inner rings. The second outer ring group includes two second outer rings arranged coaxially, and a second outer ring cavity is formed between the two second outer rings. The first inner ring cavity and the second inner ring cavity are configured to form an O-ring on the mold, and the first outer ring cavity and the second outer ring cavity are configured to form another O-ring on the mold.

5. The production mold as described in claim 2, characterized in that, The sheet cavity is recessed with a plurality of interconnected first cavities, and the first forming part is correspondingly protruded into the first cavity; The second module has a plurality of interconnected second cavities recessed on its mold-closing surface, and the second molding part is protruding from each of the second cavities in a corresponding manner.

6. The production mold as described in claim 5, characterized in that, The first cavity includes an extrusion groove located within the innermost first forming ring group, and the second cavity has an extrusion portion protruding within the innermost second forming ring group; or, The first cavity has an extrusion section protruding from a first forming ring group located at the innermost part, and the second cavity includes an extrusion groove located in a second forming ring group located at the innermost part.

7. The production mold as described in claim 1, characterized in that, The first retaining ring and the second retaining ring have the same shape, and the plurality of notches are respectively located at the connection of each adjacent inner sidewall of the second retaining ring.

8. The production mold as described in claim 1, characterized in that, The first retaining ring and the second retaining ring are arranged side by side at intervals. The mold cavity is further provided with a plurality of spacers protruding in each of the first retaining rings. The first retaining rings and the plurality of spacers enclose a plurality of sheet cavities for forming the mold sheet in the first mold cavity. The external overflow groove surrounds the plurality of second retaining rings.

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