A porous plastic mold with two-stage parting and demolding and its demolding method

Abstract

The present invention discloses a porous plastic mold with two-stage mold parting and demolding, which includes a push plate. A product cavity is provided inside the push plate. A first support plate and a second support plate are successively arranged below the push plate. A first insert is provided on the first support plate. One end of the first insert is fixedly connected to the first support plate, and the other end is inserted into the product cavity. A second insert is provided on the second support plate. One end of the second insert is fixedly connected to the second support plate, and the other end passes through the first support plate and then is inserted into the product cavity. The invention also includes a latch structure for limiting and driving the push plate, the first support plate and the second support plate. The latch structure is respectively connected to the push plate, the first support plate and the second support plate. The present invention reduces the number of inserts, reduces the installation difficulty of the mold, and reduces the assembly cost of the mold. The present invention also discloses a demolding method for the above-mentioned porous plastic part mold, which adopts a demolding method of two-stage mold parting plus one-time ejection, reduces the possibility of deformation of the plastic part products, and improves the qualified rate of mold production.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic molds, and more specifically, to a porous plastic mold with two-stage parting and demolding and a demolding method thereof. Background Art

[0002] Porous plastic products have been widely used in various industries, especially in the medical industry, and are even essential. For example, transportation boxes for various sampling tubes, etc.

[0003] As Figures 1-3 shown, when producing such products, existing plastic molds are generally designed as independent inserts. When demolding the plastic part products, the overall ejector plate pushes the plastic part products out of the product cavity.

[0004] The existing plastic molds of this kind generally have the following problems:

[0005] 1. It is inconvenient to assemble the water channels for the independent inserts, and the mold installation is relatively difficult, which invisibly increases the production cost of the mold.

[0006] 2. In the honeycomb structure design of the overall ejector plate, the grid spacing in the middle is very small, usually only 0.3 mm, and the processing difficulty is very high.

[0007] 3. The grid in the middle of the overall ejector plate is prone to deformation, resulting in unbalanced ejection of the plastic part products and a high defective rate. Summary of the Invention

[0008] In order to solve the problems existing in the above-mentioned prior art, the present invention provides a porous plastic mold with two-stage parting and demolding, and specifically provides the following technical solutions:

[0009] A porous plastic mold with two-stage parting and demolding includes an ejector plate. A product cavity is provided inside the ejector plate. A first support plate and a second support plate are sequentially provided below the ejector plate. A first insert is provided on the first support plate. One end of the first insert is fixedly connected to the first support plate, and the other end is inserted into the product cavity. A second insert is provided on the second support plate. One end of the second insert is fixedly connected to the second support plate, and the other end passes through the first support plate and then is inserted into the product cavity. It further includes a latch structure for limiting and driving the ejector plate, the first support plate, and the second support plate. The latch structure is respectively connected to the ejector plate, the first support plate, and the second support plate.

[0010] Further, a first fixing plate is provided between the first supporting plate and the pushing plate. The first fixing plate is fixedly connected to the first supporting plate. A second fixing plate is provided between the first supporting plate and the second supporting plate. The second fixing plate is fixedly connected to the second supporting plate. A thimble plate is provided below the second supporting plate. A thimble is connected to the lower surface of the thimble plate. Thimbles are provided on the thimble plate. One end of each thimble is fixedly connected to the thimble plate, and the other end sequentially passes through the second supporting plate, the second fixing plate, the first supporting plate, and the first fixing plate and then inserts into the product cavity.

[0011] Further, a bottom plate is further included. Guide posts are provided on the bottom plate. One end of each guide post is fixedly connected to the bottom plate, and the other end passes through the thimble plate and is fixedly connected to the second supporting plate.

[0012] Further, the trigger structure includes a trigger plate. The trigger plate is fixedly connected to the second supporting plate. A push rod is slidably provided on the trigger plate. The push rod is fixedly connected to the thimble plate. A first card slot is provided on the pushing plate. A first limiting block is provided in the first card slot. A second card slot is provided on the first supporting plate. A second limiting block is provided in the second card slot. The end faces of the first limiting block and the second limiting block are respectively abutted against the trigger plate. A third card slot is provided on the push rod. The bottom surface of the first limiting block can be abutted against the upper end surface of the push rod. The bottom surface of the second limiting block can be abutted against the lower surface of the inner wall of the third card slot. A first inclined surface and a second inclined surface are provided on the trigger plate along the movement direction of the push rod. A third inclined surface adapted to the first inclined surface is provided on the upper surface of the first limiting block. A fourth inclined surface adapted to the second inclined surface is provided on the upper surface of the second limiting block.

[0013] Further, the first limiting block includes a first guiding block and a first sliding block. The first guiding block is fixed in the first clamping groove. A first sliding block receiving groove is provided in the first guiding block. One end of the first sliding block is inserted into the first sliding block receiving groove and is slidably and limit-connected to the first guiding block. The third inclined surface is disposed on the upper surface of the first sliding block. The end surface of the first sliding block abuts against the clamping plate. A first spring hole is provided in the first sliding block. A first spring is provided in the first spring hole. The other end of the first spring abuts against the inner side wall of the first sliding block receiving groove. The second limiting block includes a second guiding block and a second sliding block. The second guiding block is fixed in the second clamping groove. A second sliding block receiving groove is provided in the second guiding block. One end of the second sliding block is inserted into the second sliding block receiving groove and is slidably and limit-connected to the second guiding block. The fourth inclined surface is disposed on the upper surface of the second sliding block. The end surface of the second sliding block abuts against the clamping plate. A second spring hole is provided in the second sliding block. A second spring is provided in the second spring hole. The other end of the second spring abuts against the inner side wall of the second sliding block receiving groove.

[0014] Further, the number of the buckle mechanisms is two, and the two buckle mechanisms are symmetrically distributed left and right with respect to the perpendicular bisector of the first support plate.

[0015] Further, the first insert and the second insert are misaligned and distributed left and right with respect to the perpendicular bisector of the first support plate, and the first insert and the second insert are symmetrically distributed left and right with respect to the perpendicular bisector of the first support plate.

[0016] Further, the number of the first inserts and the second inserts is 6 respectively. Eight insert columns are provided at one end of each of the first inserts and the second inserts inserted into the product cavity.

[0017] On the other hand, the present invention also provides a demolding method for producing plastic parts products by using the above-mentioned two-stage parting and demolding porous plastic mold, including:

[0018] The first parting: The demolding thrust acts on the ejector rod, pushing the ejector pin plate to move a distance S1. The first support plate and the push plate are pushed to move a distance S1 through the push rod, so that the second insert is separated from the porous plastic part product in the product cavity by a distance S1. Wherein, after the push plate moves a distance S1, the second inclined surface abuts against the fourth inclined surface;

[0019] Second parting: Continue to move the ejector plate by a distance of S2. Push the push plate by a distance of S2 through the ejector pin, so that the first insert disengages from the porous plastic part in the product cavity by a distance of S2. Among them, after the push plate moves by a distance of S1 + S2, the first inclined surface abuts against the third inclined surface, and the ejector pin abuts against the porous plastic part in the product cavity;

[0020] Ejecting the plastic part: Continue to move the ejector plate by a distance of S3, and the ejector pin pushes the porous plastic part in the product cavity to move by a distance of S3.

[0021] Furthermore, in the second parting step, the second slider is squeezed into the second slider receiving groove by the second inclined surface, so that the second slider disengages from the third card slot; in the step of ejecting the plastic part, the first slider is squeezed into the first slider receiving groove by the first inclined surface, so that the first slider disengages from the end face of the ejector pin.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The number of inserts is reduced, the installation difficulty of the mold is reduced, and the assembly cost of the mold is reduced.

[0024] 2. The first support plate and the second support plate are used as ejecting parts. The processing is simple and the strength is sufficient, and it is not easy to deform, greatly improving the mold life and reducing the mold repair and maintenance costs.

[0025] 3. Fixed plates are respectively arranged above the first support plate and the second support plate, improving the stability of the mold operation.

[0026] 4. By using two-stage parting and demolding, the possibility of deformation of the plastic part is reduced, and the yield rate of mold production is improved. Description of the Drawings

[0027] Figure 1 is a schematic structural diagram of a porous plastic mold in the prior art;

[0028] Figure 2 is a schematic structural diagram of a push plate in the prior art;

[0029] Figure 3 is a schematic structural diagram of an insert in the prior art;

[0030] Figure 4 is a schematic overall structural diagram of a porous plastic mold with two-stage parting and demolding according to the present invention;

[0031] Figure 5 is a schematic overall structural diagram of the first insert and the second insert in an embodiment of the present invention;

[0032] Figure 6 It is the overall schematic diagram of the buckle mechanism structure in the embodiment of the present invention;

[0033] Figure 7 It is the exploded structure schematic diagram of the buckle mechanism structure in the embodiment of the present invention;

[0034] Figure 8 It is the structure schematic diagram after the first parting of the two-parting and demolding porous plastic mold of the present invention;

[0035] Figure 9 It is the structure schematic diagram after the second parting of the two-parting and demolding porous plastic mold of the present invention;

[0036] Figure 10 It is the structure schematic diagram after the plastic part product of the two-parting and demolding porous plastic mold of the present invention is demolded. Specific embodiments

[0037] To further elaborate the technical means and technical effects of the present invention, the preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0038] In actual production, there are various porous plastic products, and the plastic part products with any number of hole positions are applicable to the present invention. Taking the plastic mold for producing 96-hole plastic part products as an example, the beneficial effects of the present invention are fully illustrated below.

[0039] As Figures 4-7 shown, a two-parting and demolding porous plastic mold includes a push plate 1 and a buckle mechanism structure. A product cavity 2 is provided inside the push plate 1. A hot runner and a cooling water flow channel are provided inside the product cavity 2. The hot runner is used for feeding during injection molding. A first fixed plate 3, a first support plate 4, a second fixed plate 5, a second support plate 6 and a thimble plate 7 are sequentially provided below the push plate 1. Among them, the first fixed plate 3 is fixedly connected to the first support plate 4, and the second fixed plate 5 is fixedly connected to the second support plate 6. The buckle mechanism structure is respectively connected to the push plate 1, the first support plate 4, the second support plate 6 and the thimble plate 7, and is used for limiting and linking the push plate 1, the first support plate 4, the second support plate 6 and the thimble plate 7.

[0040] The first carrier plate 4 is provided with a first insert 8. One end of the first insert 8 is fixedly connected to the first carrier plate 4, and the other end passes through the first fixed plate 3 and then inserts into the product cavity 2. The second carrier plate 6 is provided with a second insert 9. One end of the second insert 9 is fixedly connected to the second carrier plate 6, and the other end sequentially passes through the second fixed plate 5, the first carrier plate 4 and the first fixed plate 3 and then inserts into the product cavity 2. There are 6 first inserts 8 and 6 second inserts 9 respectively, and 8 insert columns 10 are provided at one end of each first insert 8 and second insert 9 that inserts into the product cavity 2. The first inserts 8 and the second inserts 9 are distributed in a staggered manner to the left and right with respect to the vertical bisector of the first carrier plate 4, and the first inserts 8 and the second inserts 9 are symmetrically distributed to the left and right with respect to the vertical bisector of the first carrier plate 4; specifically, the second inserts 9 are adjacent to both the left and right sides of the vertical bisector of the first carrier plate 4, that is, there is a second insert 9 first on both the left and right sides of the vertical bisector of the first carrier plate 4, followed by a first insert 8, and so on. The first inserts 8 and the second inserts 9 have a total of 96 insert columns 10, which are used for forming the hole positions of the plastic part 11 during the injection molding production of the mold.

[0041] The ejector plate 7 is connected with an ejector rod 12 on its lower surface. The ejector rod 12 is connected to the driving device of the injection molding machine during the injection molding production. The ejector plate 7 is provided with ejector pins 13. One end of the ejector pin 13 is fixedly connected to the ejector plate 7, and the other end sequentially passes through the second carrier plate 6, the second fixed plate 5, the first carrier plate 4 and the first fixed plate 3 and then inserts into the product cavity 2. The ejector pins 13 are used to eject the plastic part 11 from the product cavity 2 when the plastic part 11 is demolded, facilitating demolding.

[0042] An ejector pin support plate 14 and a bottom plate 15 are sequentially arranged below the ejector plate 7. The ejector pin support plate 14 is fixedly connected to the ejector plate 7; the bottom plate 15 is used to fix the second carrier plate 6 and the second fixed plate 5. One side of the bottom plate 15 is fixedly connected to the injection molding machine during injection molding, and the other side is provided with guide columns 16; one end of the guide column 16 is fixedly connected to the bottom plate 15, and the other end sequentially passes through the ejector pin support plate 14 and the ejector plate 7 and then is fixedly connected to the second carrier plate 6.

[0043] The buckle mechanism includes a buckle plate 17, a push rod 18, a first limit block 19 and a second limit block 20. The buckle plate 17 is fixedly connected to the second support plate 6. A chute 171 is provided on the inner side surface of the buckle plate 17. The push rod 18 is slidably arranged on the chute 171, and one end of the push rod 18 is fixedly connected to the ejector pin support plate 14. A first card slot 101 is provided on the side edge of the push plate 1. The first limit block 19 is arranged in the first card slot 101. A second card slot 401 is provided on the side edge of the first support plate 4. The second limit block 20 is arranged in the second card slot 401. The end faces of the first limit block 19 and the second limit block 20 are respectively abutted against the inner side surface of the buckle plate 17. A third card slot 181 is provided on the push rod 18. When the push rod 18 slides in the chute 171, the bottom surface of the first limit block 19 can be abutted against the upper end surface of the push rod 18, and the bottom surface of the second limit block 20 can be abutted against the lower surface of the inner wall of the third card slot 181. A first inclined surface 172 and a second inclined surface 173 are provided on the buckle plate 17 along the movement direction of the push rod 18. A third inclined surface 191 adapted to the first inclined surface 172 is provided on the upper surface of the first limit block 19. A fourth inclined surface 201 adapted to the second inclined surface 173 is provided on the upper surface of the second limit block 20. When the push rod 18 slides in the chute 171, the first inclined surface 172 can be abutted against the third inclined surface 191, and the second inclined surface 173 can be abutted against the fourth inclined surface 201. In this embodiment, the first inclined surface 172, the second inclined surface 173, the third inclined surface 191 and the fourth inclined surface 201 are all flat surfaces. Obviously, in other embodiments, the first inclined surface 172, the second inclined surface 173, the third inclined surface 191 and the fourth inclined surface 201 can also be arc surfaces or multi-surface structures similar to arc surfaces.

[0044] The first limiting block 19 includes a first guiding block 192 and a first sliding block 193. The first guiding block 192 is fixed in the first clamping groove 101. A first sliding block receiving groove 194 is provided in the first guiding block 192. One end of the first sliding block 193 is inserted into the first sliding block receiving groove 194 and is slidably and limit-connected to the first guiding block 192. The third inclined surface 191 is arranged on the upper surface of the first sliding block 193 near the buckle plate 17. The end surface of the first sliding block 193 abuts against the inner side surface of the buckle plate 17. A first spring hole is provided on the first sliding block 193. A first spring 21 is arranged in the first spring hole. The other end of the first spring 21 abuts against the inner side wall of the first sliding block receiving groove 194. The second limiting block 20 includes a second guiding block 202 and a second sliding block 203. The second guiding block 202 is fixed in the second clamping groove 401. A second sliding block receiving groove 204 is provided in the second guiding block 202. One end of the second sliding block 203 is inserted into the second sliding block receiving groove 204 and is slidably and limit-connected to the second guiding block 202. The fourth inclined surface 201 is arranged on the upper surface of the second sliding block 203 near the buckle plate 17. The end surface of the second sliding block 203 abuts against the inner side surface of the buckle plate 17. A second spring hole is provided on the second sliding block 203. A second spring 22 is arranged in the second spring hole. The other end of the second spring 22 abuts against the inner side wall of the second sliding block receiving groove 204.

[0045] When the plastic part 11 is demolded, during the movement of the push rod 18 in the sliding groove 171, the second inclined surface 173 abuts against the fourth inclined surface 201 and can squeeze the second sliding block 203 to disengage from the third clamping groove 181, and the first inclined surface 172 abuts against the third inclined surface 191 and can squeeze the first sliding block 193 to disengage from the upper end surface of the push rod 18.

[0046] When the plastic mold is reset, during the movement of the push rod 18 in the sliding groove 171, the first spring 21 is reset, driving the first sliding block 193 to extend out of the first sliding block receiving groove 194 until the end surface of the first sliding block 193 abuts against the inner side wall of the buckle plate 17; the second spring 22 is reset, driving the second sliding block 203 to extend out of the second sliding block receiving groove 204 until the end surface of the second sliding block 203 abuts against the inner side wall of the buckle plate 17.

[0047] In order to make the movement of the plastic mold more stable and smooth during demolding, in this embodiment, there are two buckle structures, which are symmetrically distributed left and right with respect to the vertical bisector of the first support plate 4. Of course, in other embodiments, the number of buckle structures can also be 4, 8 or other numbers.

[0048] The process of producing the plastic part by the multi-hole plastic mold with the above two-stage parting and demolding is as follows:

[0049] During injection molding production, the bottom plate 15 is fixed on the injection molding machine. The push plate 1, the first fixing plate 3, the first supporting plate 4, the second fixing plate 5, and the second supporting plate 6 are sequentially abutted. The ejector pin supporting plate 14 abuts against the bottom plate 15, and the ejector rod 12 is connected to the injection molding machine. The material enters the product cavity 2 from the hot runner and is cooled and solidified to complete the injection molding.

[0050] After the plastic part 11 is injection molded in the above-mentioned 96-hole plastic mold, the demolding process of the plastic part 11 is as follows:

[0051] The first step is as Figure 8 shown. The demolding thrust of the injection molding machine acts on the ejector rod 12, pushing the ejector pin supporting plate 14 and the ejector pin plate 7 to move a distance of S1. At this time, the push rod 18 also moves a distance of S1 in the chute 171. During the movement of the push rod 18, it pushes the first limiting block 19, the second limiting block 20, the first supporting plate 4, the first fixing plate 3, and the push plate 1 to move a distance of S1, so that the second insert 9 is separated from the plastic part in the product cavity 2 by a distance of S1. When the first supporting plate 4 moves a distance of S1, the first demolding of the plastic mold is completed, that is, the first supporting plate 4 is separated from the second fixing plate 5 by a distance of S1. Among them, after the push plate 1 moves a distance of S1, the second inclined surface 173 abuts against the fourth inclined surface 201.

[0052] The second step is as Figure 9 shown. The ejector rod 12 pushes the ejector pin supporting plate 14 and the ejector pin plate 7 to continue moving a distance of S2, and through the push rod 18, it pushes the first limiting block 19 and the push plate 1 to move a distance of S2, so that the first insert 8 is separated from the plastic part in the product cavity 2 by a distance of S2, and the second insert 9 is separated from the plastic part in the product cavity 2 by a distance of S1 + S2. When the push plate 1 moves a distance of S1 + S2, the second demolding of the plastic mold is completed, that is, the first supporting plate 4 is separated from the second fixing plate 5 by a distance of S1, and the push plate 1 is separated from the first fixing plate 3 by a distance of S2. Among them, after the push plate 1 moves a distance of S1 + S2, the first inclined surface 172 abuts against the third inclined surface 191, and the ejector pin 13 abuts against the plastic part 11 in the product cavity 2. During this process, the second inclined surface 173 squeezes the second slider 203, causing it to retract into the second slider receiving groove 204, so that the second slider 203 is separated from the third card slot 181. Therefore, during the second demolding process of the mold, the first fixing plate 3 and the first supporting plate 4 will not move.

[0053] The third step is as Figure 10 shown. The ejector rod 12 continues to push the ejector pin supporting plate 14 and the ejector pin plate 7 to move a distance of S3, and through the ejector pin 13, it pushes the plastic part 11 in the product cavity 2 to move a distance of S3, and ejects it from the product cavity 2 to complete the product demolding. During this process, the first inclined surface 172 squeezes the first slider 193, causing it to retract into the first slider receiving groove 194, so that the first slider 193 is separated from the upper end surface of the push rod 18. Therefore, during the process of the ejector pin 13 ejecting the plastic part 11, the push plate 1 will not move.

[0054] It should be noted that the aforementioned S1 distance, S2 distance, and S3 distance are all preset by the control program of the injection molding machine according to the heights of different plastic parts; it can be understood that any value is applicable to S1, S2, and S3.

[0055] In this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

Claims

1. A porous plastic mold with two-stage parting and demolding, characterized in that, It includes a push plate, a product cavity is provided inside the push plate. A first support plate and a second support plate are successively arranged below the push plate. A first insert is provided on the first support plate. One end of the first insert is fixedly connected to the first support plate, and the other end is inserted into the product cavity. A second insert is provided on the second support plate. One end of the second insert is fixedly connected to the second support plate, and the other end passes through the first support plate and is inserted into the product cavity; It further includes a latch structure for limiting and driving the push plate, the first support plate and the second support plate. The latch structure is respectively connected to the push plate, the first support plate and the second support plate; The first insert and the second insert are distributed in a staggered manner to the left and right with respect to the vertical bisector of the first support plate, and the first insert and the second insert are symmetrically distributed to the left and right with respect to the vertical bisector of the first support plate; A thimble plate is provided below the second support plate. The latch structure includes a latch plate. The latch plate is fixedly connected to the second support plate. A push rod is slidably arranged on the latch plate. The push rod is fixedly connected to the thimble plate. A first card slot is provided on the push plate. A first limiting block is arranged in the first card slot. A second card slot is provided on the first support plate. A second limiting block is arranged in the second card slot. The end faces of the first limiting block and the second limiting block are respectively abutted against the latch plate; A third card slot is provided on the push rod. The bottom surface of the first limiting block can be abutted against the upper end surface of the push rod. The bottom surface of the second limiting block can be abutted against the lower surface of the inner wall of the third card slot; The latch plate is provided with a first inclined surface and a second inclined surface along the movement direction of the push rod. The upper surface of the first limiting block is provided with a third inclined surface adapted to the first inclined surface. The upper surface of the second limiting block is provided with a fourth inclined surface adapted to the second inclined surface.

2. The porous plastic mold with two-stage parting and demolding as described in claim 1, characterized in that, A first fixing plate is provided between the first support plate and the push plate. The first fixing plate is fixedly connected to the first support plate. A second fixing plate is provided between the first support plate and the second support plate. The second fixing plate is fixedly connected to the second support plate; The lower surface of the thimble plate is connected with a thimble rod. Thimbles are provided on the thimble plate. One end of the thimble is fixedly connected to the thimble plate, and the other end passes through the second support plate, the second fixing plate, the first support plate and the first fixing plate in sequence and is inserted into the product cavity.

3. The porous plastic mold with two-stage mold splitting and demolding as described in claim 2, wherein It further includes a bottom plate. Guide posts are provided on the bottom plate. One end of the guide post is fixedly connected to the bottom plate, and the other end passes through the thimble plate and is fixedly connected to the second support plate.

4. The porous plastic mold with two-stage mold splitting and demolding as described in claim 3, characterized in that, The first limiting block includes a first guide block and a first slider. The first guide block is fixed in the first card slot. A first slider receiving groove is provided in the first guide block. One end of the first slider is inserted into the first slider receiving groove and is slidably and limitedly connected to the first guide block. The third inclined surface is arranged on the upper surface of the first slider. The end face of the first slider is abutted against the latch plate. A first spring hole is provided on the first slider. A first spring is arranged in the first spring hole. The other end of the first spring is abutted against the inner side wall of the first slider receiving groove; The second limiting block includes a second guiding block and a second sliding block. The second guiding block is fixed in the second clamping groove. A second sliding block receiving groove is provided in the second guiding block. One end of the second sliding block is inserted into the second sliding block receiving groove and is slidably and limit-connected to the second guiding block. The fourth inclined surface is arranged on the upper surface of the second sliding block. The end surface of the second sliding block abuts against the clamping plate. A second spring hole is provided in the second sliding block. A second spring is provided in the second spring hole. The other end of the second spring abuts against the inner side wall of the second sliding block receiving groove.

5. The porous plastic mold with two-stage mold splitting and demolding as claimed in claim 4, wherein, There are two of the buckle structures, and the two buckle structures are symmetrically distributed left and right with respect to the perpendicular bisector of the first support plate.

6. The porous plastic mold with two-stage mold splitting and demolding as described in claim 5, characterized in that, There are 6 of the first inserts and the second inserts respectively. 8 insert columns are provided at one end of each of the first inserts and the second inserts inserted into the product cavity.

7. A demolding method for producing porous plastic parts using a porous plastic mold with two-stage parting and demolding as described in any one of claims 4-6, characterized in that, Including: The first mold splitting: The demolding thrust acts on the ejector rod, pushing the ejector pin plate to move a distance of S1. The ejector pin pushes the first support plate and the push plate to move a distance of S1, so that the second insert disengages from the porous plastic part in the product cavity by a distance of S1. Among them, after the push plate moves a distance of S1, the second inclined surface abuts against the fourth inclined surface. The second mold splitting: Continuing to push the ejector pin plate to move a distance of S2, the push plate is pushed by the ejector pin to move a distance of S2, so that the first insert disengages from the porous plastic part in the product cavity by a distance of S2. Among them, after the push plate moves a distance of S1+S2, the first inclined surface abuts against the third inclined surface, and the ejector pin abuts against the porous plastic part in the product cavity. Ejecting the plastic part: Continuing to push the ejector pin plate to move a distance of S3, the ejector pin pushes the porous plastic part in the product cavity to move a distance of S3.

8. The demolding method of the porous plastic part product according to claim 7, characterized in that, In the second mold splitting step, the second sliding block is squeezed into the second sliding block receiving groove by the second inclined surface, so that the second sliding block disengages from the third clamping groove. In the step of ejecting the plastic part, the first sliding block is squeezed into the first sliding block receiving groove by the first inclined surface, so that the first sliding block disengages from the end surface of the ejector pin.

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