An inverted mold

Abstract

The utility model discloses a kind of inverted mould, inverted mould includes upper die plate, lower die plate, two stripping structures and two ejection structures, two stripping structures and two ejection structures are respectively along first horizontal direction, second horizontal direction symmetry and set between upper die plate and lower die plate, when upper die plate and lower die plate close mould, upper die plate, lower die plate, shovel base and two stripping structures jointly form the cavity with inverted structure;When upper die plate and lower die plate open mould, two stripping structures movement and the inverted stripping of the forming piece in cavity, two ejection structures movement will be formed piece and upper die plate stripping.This inverted mould can first release inverted in opening mould process, then complete ejection and separation, ensure that forming piece stripping smoothly, meet the demand of efficient, automated production.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, specifically to an inverted mold. Background Technology

[0002] In the field of injection molding, some injection molded parts have undercut structures on their surfaces. Molds for these parts require inverted demolding. However, existing inverted molds, if performed by directly opening and ejecting the entire part during demolding, can easily lead to excessive stress on the undercut area, causing product deformation, tearing, or even failure to demold. Furthermore, some inverted molds have unreasonable demolding sequence and poor coordination between the demolding and ejection structures, affecting demolding reliability and product yield. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide an inverted mold that can first release the inverted clips during the mold opening process, and then complete the ejection and separation, so as to ensure that the molded parts can be demolded smoothly.

[0004] This utility model embodiment provides an inverted mold, the inverted mold comprising:

[0005] Upload template;

[0006] The lower template is located below the upper template, and a shovel base is provided inside the lower template;

[0007] Two demolding structures are symmetrically arranged between the upper template and the lower template along a first horizontal direction;

[0008] Two ejector structures are symmetrically arranged between the upper template and the lower template along a second horizontal direction, which is perpendicular to the first horizontal direction.

[0009] When the upper mold and the lower mold are closed, the upper mold, the lower mold, the shovel base, and the two demolding structures together form a cavity;

[0010] When the upper and lower mold plates open, the two demolding structures move to disengage the molded part inside the cavity, and the two ejection structures move to demold the molded part from the upper mold plate.

[0011] Optionally, the demolding structure includes:

[0012] A slider is slidably disposed on the upper template along a first horizontal direction, and a drive groove is provided on the outer side of the slider;

[0013] The first driving block is fixedly connected to the lower template, and the top of the first driving block extends above the lower template. The top of the first driving block has a driving part protruding towards the slider.

[0014] The driving part is slidably disposed in the driving groove along the height direction, and when the driving part moves out of the driving groove, it pushes the slider to move along the first horizontal direction, so that the slider disengages from the undercut structure of the molded part.

[0015] Optionally, the slider includes a sliding body and a forming part fixed below the sliding body. The driving groove is provided on the outer side of the sliding body, and the outer side of the forming part is provided with a forming block. The outer end face of the forming block forms the profile of the undercut structure.

[0016] Optionally, the bottom surface of the drive groove is provided as a first transmission inclined surface, and the bottom surface of the drive part is provided with a first drive inclined surface. The drive part drives the slider to move along a first horizontal direction through the cooperation of the first drive inclined surface and the first transmission inclined surface.

[0017] Optionally, the slider further includes a limiting plate, which is fixed above the sliding body and extends outward along the first horizontal direction to the outside of the sliding body. The top surface of the limiting plate includes two limiting grooves arranged side by side along the first horizontal direction.

[0018] The demolding structure also includes an elastic positioning element installed on the upper template. The elastic positioning element includes a housing, an elastic element, and a positioning bead. The positioning bead is connected to the housing through the elastic element.

[0019] During the movement of the slider along the first horizontal direction, the positioning bead moves between the two limiting grooves under the action of the elastic element.

[0020] Optionally, the upper template includes two sets of first mounting slots symmetrically arranged along a first horizontal direction, and the lower template includes two sets of second mounting slots symmetrically arranged along a first horizontal direction. The two sets of second mounting slots are respectively connected to the two sets of first mounting slots.

[0021] The two sliders are slidably disposed in the two sets of the first mounting slots, and the two first driving blocks are fixed in the two sets of the second mounting slots. The top of the first driving block extends out of the second mounting slot and into the corresponding first mounting slot, so that the driving part is engaged and connected in the driving slot.

[0022] Optionally, the first mounting slot group includes a first mounting slot, a second mounting slot, and a third mounting slot. The second mounting slot and the third mounting slot are arranged side by side below the first mounting slot. The second mounting slot connects the first mounting slot and the bottom surface of the upper template. The third mounting slot is located outside the second mounting slot and is laterally connected to the second mounting slot. The second mounting slot group includes a fourth mounting slot that is connected to the third mounting slot.

[0023] The limiting plate is installed in the first mounting groove, the sliding body is installed in the second mounting groove, the forming part extends out from the bottom of the second mounting groove, the first driving block is fixed in the fourth mounting groove, and the top of the first driving block extends out from the fourth mounting groove and into the third mounting groove.

[0024] Optionally, the ejection structure includes:

[0025] A fixing block is fixedly connected to the lower template, and the top of the fixing block extends above the lower template;

[0026] The top block is slidably connected to the upper template along the height direction and located above the cavity. The top block is located inside the fixed block along the second horizontal direction, and the top block is provided with a transmission groove on the outer side facing the fixed block.

[0027] The second driving block is slidably connected to the fixed block along the second horizontal direction;

[0028] The second driving block is slidably disposed in the transmission groove along the height direction. When the second driving block moves to contact the bottom surface of the transmission groove and continues to move, it drives the top block to move downward along the height direction to push the molded part to demold from the upper template.

[0029] Optionally, the ejection structure further includes two third driving blocks, which are fixed on the upper template and are symmetrically arranged on both sides of the top block;

[0030] As the second driving block drives the top block to move downward along the height direction, the third driving block pushes the second driving block to move outward synchronously along the second horizontal direction and disengage from the top block.

[0031] Optionally, the ejection structure further includes:

[0032] Two first elastic elements are symmetrically connected between the top block and the upper template. The top block moves upward and resets under the force of the two first elastic elements.

[0033] A second elastic element is connected between the fixed block and the second driving block, and the second driving block is moved and reset along the second horizontal direction by the force of the second elastic element.

[0034] Optionally, the top block includes a top block body, two guide plates and a baffle. The two guide plates are symmetrically arranged on both sides of the top block body along a first horizontal direction. The baffle is fixed above the top block body and the two guide plates. The two ends of the baffle extend outward along the first horizontal direction to the outside of the two guide plates. The top block body has a transmission groove on its outer side facing the fixed block, and the bottom surface of the transmission groove is set as a transmission plane.

[0035] Optionally, the third driving block includes a guide groove with a lateral opening and a second driving ramp, the second driving ramp being disposed on the side of the third driving block facing the fixed block;

[0036] The two guide plates are slidably disposed in the two guide grooves respectively, and the second driving inclined surfaces of the two third driving blocks are symmetrically disposed on both sides of the bottom surface of the transmission groove.

[0037] Optionally, the second drive block includes a drive plane and two second transmission ramps, the two second transmission ramps being symmetrically arranged on both sides of the drive plane;

[0038] The driving plane and the transmission plane cooperate to drive the top block to move downward, and the two second driving inclined surfaces and the two second transmission inclined surfaces cooperate to drive the second driving block to move outward along the second horizontal direction and disengage from the transmission groove.

[0039] Optionally, the fixing block includes a movable groove extending along a second horizontal direction, a cover plate is fixed to the movable groove on the side away from the top block, the second driving block is movably disposed in the movable groove, and the second elastic element is located in the movable groove and connected between the cover plate and the second driving block.

[0040] Optionally, the upper template further includes two sets of first assembly slots symmetrically arranged along the second horizontal direction, and the lower template includes two sets of second assembly slots symmetrically arranged along the second horizontal direction. The two sets of second assembly slots are respectively connected to the two sets of first assembly slots.

[0041] The two top blocks and the two third drive blocks are respectively disposed in the two sets of the first assembly slots, the two fixing blocks are respectively fixed in the two sets of the second assembly slots, and the fixing blocks extend from the second assembly slots and extend into the corresponding first assembly slots. The second drive blocks are connected in the transmission slots.

[0042] Optionally, the first assembly slot group includes a first assembly slot, a second assembly slot, two third assembly slots, and a fourth assembly slot. The first assembly slot extends along a first horizontal direction. The second assembly slot is vertically connected to the first assembly slot and the bottom surface of the upper template. Guide slots are provided on both sides of the second assembly slot along the first horizontal direction. The two third assembly slots are arranged parallel to each other below the first assembly slot and are laterally connected to the second assembly slot. The fourth assembly slot is arranged along a second horizontal direction outside the first assembly slot and is laterally connected to the first assembly slot, the second assembly slot, and the two third assembly slots. The second assembly slot group includes a fifth assembly slot connected to the fourth assembly slot.

[0043] The baffle is installed in the first assembly slot, the first elastic element is connected between the baffle and the bottom surface of the first assembly slot, the two third drive blocks are respectively fixed in the two third assembly slots, and the two guide slots are respectively connected to the two guide slots, the top block body is installed in the second assembly slot, the two guide plates are respectively connected to the corresponding guide slots, the fixing block is fixed in the fifth assembly slot and the top of the fixing block extends out of the fifth assembly slot and into the fourth assembly slot, and the second drive block extends out of the fourth assembly slot and into the transmission slot.

[0044] This utility model provides an inverted mold, which includes an upper mold plate, a lower mold plate, two demolding structures, and two ejection structures. The two demolding structures and the two ejection structures are symmetrically arranged between the upper and lower mold plates along a first horizontal direction and a second horizontal direction, respectively. When the upper and lower mold plates are closed, the upper mold plate, the lower mold plate, the mold base, and the two demolding structures together form a cavity with an undercut structure. When the upper and lower mold plates are opened, the two demolding structures move to undercut and demold the molded part in the cavity, and the two ejection structures move to demold the molded part from the upper mold plate. This inverted mold can release the undercut first during the mold opening process, and then complete the ejection and separation, ensuring smooth demolding of the molded part and meeting the needs of efficient and automated production. Attached Figure Description

[0045] The above and other objects, features and advantages of the present invention will become clearer from the following description of embodiments of the present invention with reference to the accompanying drawings, in which:

[0046] Figure 1 This is a schematic diagram of the structure of the fixing block, shovel base and first driving block installed on the lower template according to an embodiment of the present invention;

[0047] Figure 2 yes Figure 1 A sectional view along a section line parallel to the second horizontal direction;

[0048] Figure 3 yes Figure 1 A sectional view along a section line parallel to the first horizontal direction.

[0049] Figure 4 This is a schematic diagram of the structure of the slider, top block and third drive block of this utility model installed on the upper template;

[0050] Figure 5 yes Figure 4 A sectional view taken along the second horizontal direction;

[0051] Figure 6 yes Figure 4 A sectional view taken along the first horizontal direction;

[0052] Figure 7 This is a schematic diagram of the structure of the shovel base installed on the lower template according to an embodiment of the present invention;

[0053] Figure 8 This is a schematic diagram of the upper template in an embodiment of the present invention;

[0054] Figure 9 This is a structural schematic diagram of the top surface of the upper template in an embodiment of this utility model;

[0055] Figure 10 This is a cross-sectional view of the upper template of this utility model along the first horizontal direction;

[0056] Figure 11 This is a cross-sectional view of the upper template of this utility model embodiment cut along the second horizontal direction;

[0057] Figure 12 This is a schematic diagram of the demolding structure according to an embodiment of the present invention;

[0058] Figure 13 This is an exploded view of the demolding structure according to an embodiment of the present invention;

[0059] Figure 14 This is a schematic diagram of the ejection structure according to an embodiment of the present invention;

[0060] Figure 15 This is a schematic diagram showing the connection between the top block, the first elastic element, and the third driving block in an embodiment of the present invention. Figure 1 ;

[0061] Figure 16 This is a schematic diagram showing the connection between the top block, the first elastic element, and the third driving block in an embodiment of the present invention. Figure 2 ;

[0062] Figure 17This is a schematic diagram of the top block structure according to an embodiment of the present invention;

[0063] Figure 18 This is a schematic diagram of the structure of the third driving block in an embodiment of the present invention;

[0064] Figure 19 This is a schematic diagram of the assembly structure of the second driving block, the second elastic element, the cover plate, and the fixing block according to an embodiment of the present utility model.

[0065] Figure 20 This is an assembly cross-sectional view of the second driving block, the second elastic element, the cover plate, and the fixing block according to an embodiment of the present utility model;

[0066] Figure 21 This is a schematic diagram of the structure of the second driving block according to an embodiment of the present invention;

[0067] Figure 22 This is a schematic diagram of the structure of the molded part according to an embodiment of the present utility model;

[0068] Figure 23 This is a cross-sectional view of the elastic positioning member according to an embodiment of the present utility model;

[0069] Figure 24 This is a cross-sectional view of the inverted mold of this utility model along the second horizontal direction;

[0070] Figure 25 This is a cross-sectional view of the inverted mold of this utility model along the first horizontal direction;

[0071] Figure 26 , Figure 27 This is a cross-sectional view of the upper fixing plate, the stripping plate and the upper template separated and opened at different positions according to an embodiment of the present utility model;

[0072] Figure 28 , Figure 29 , Figure 30 This is a cross-sectional view of the upper fixing plate and the stripping plate separated and opened at different positions according to an embodiment of this utility model;

[0073] Figure 31 , Figure 32 , Figure 33 This is a cross-sectional view of the upper template of this utility model at different positions when it moves upward a first vertical distance;

[0074] Figure 34 , Figure 35 , Figure 36 This is a cross-sectional view at different positions when the upper template of this utility model continues to move upward a second vertical distance;

[0075] Figure 37 , Figure 38 , Figure 39 This is a cross-sectional view at different positions when the upper template of this utility model continues to move upward a third vertical distance;

[0076] Figure 40 , Figure 41 , Figure 42 This is a cross-sectional view at different positions when the upper template of this utility model continues to move upward a fourth vertical distance;

[0077] Figure 43 , Figure 44 , Figure 45 , Figure 46 This is a cross-sectional view at different positions when the upper template of this utility model continues to move upward a fifth vertical distance;

[0078] Figure 47 , Figure 48 , Figure 49 This is a cross-sectional view at different positions when the upper template of this utility model continues to move upward a sixth vertical distance;

[0079] Figure 50 , Figure 51 These are cross-sectional views of the upper and lower templates at different positions when the entire assembly of this utility model embodiment is demolded;

[0080] Figure 52 This is a schematic diagram of the inverted demolding method according to an embodiment of the present invention;

[0081] Figure 53 This is a schematic diagram of the undercut demolding method according to an embodiment of the present invention;

[0082] Figure 54 This is a schematic diagram of the overall demolding method according to an embodiment of the present invention.

[0083] Figure label:

[0084] 1-Upper template; 11-First mounting slot group; 111-First mounting slot; 112-Second mounting slot; 113-Third mounting slot; 12-First assembly slot group; 121-First assembly slot; 122-Second assembly slot; 123-Third assembly slot; 124-Fourth assembly slot; 125-Guide slot; 13-Punch core; 14-Stop strip; 2-Lower template; 21-Second mounting slot group; 211-Fourth mounting slot; 22-Second assembly slot group; 221-Fifth assembly slot 23-groove; 3-shovel base; 31-inclined mating surface; 32-frustum structure; 4-demolding structure; 41-slider; 410-drive groove; 4101-first transmission inclined surface; 411-sliding body; 412-forming part; 413-forming block; 414-limiting plate; 4141-limiting groove; 415-inclined surface; 42-first drive block; 421-drive part; 4211-first drive inclined surface; 43-elastic positioning element; 431-shell; 432 - Elastic element; 433- Positioning bead; 5- Ejection structure; 51- Fixing block; 511- Moving groove; 512- Cover plate; 52- Top block; 520- Transmission groove; 5201- Transmission plane; 521- Top block body; 522- Guide plate; 523- Baffle; 53- Second drive block; 531- Drive plane; 532- Second transmission inclined surface; 54- Third drive block; 541- Guide groove; 542- Second drive inclined surface; 55- First elastic element; 56- Second elastic element; 6-Upper mold base; 7-Lower mold base; 8-Upper fixing plate; 9-Stripping plate; x-First horizontal direction; y-Second horizontal direction; z-Height direction; A-Cavity; B-Molded part; B1-Undercut structure; C-Material head; L1-First vertical distance; L2-Second vertical distance; L3-Third vertical distance; L4-Fourth vertical distance; L5-Fifth vertical distance; L6-Sixth vertical distance; H1-First lateral distance; H2-Second lateral distance. Detailed Implementation

[0085] The present application is described below based on embodiments, but it is not limited to these embodiments. In the detailed description of the present application below, certain specific details are described in detail. Those skilled in the art can fully understand the present application without these details. To avoid obscuring the substance of the present application, well-known methods, processes, flows, elements, and circuits are not described in detail.

[0086] Furthermore, those skilled in the art should understand that the accompanying drawings provided herein are for illustrative purposes only and are not necessarily drawn to scale.

[0087] Unless otherwise expressly 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 or an electrical 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, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0088] Unless the context explicitly requires it, words such as "including" or "contains" throughout the application should be interpreted as including rather than exclusive or exhaustive; that is, meaning "including but not limited to".

[0089] In the description of this application, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0090] Figure 24 and Figure 25 This is a schematic diagram of the inverted mold in this embodiment. Figure 24 and Figure 25 As shown, the inverted mold includes an upper mold plate 1, a lower mold plate 2, two demolding structures 4, and two ejection structures 5. The upper mold plate 1 and the lower mold plate 2 are arranged vertically along the height direction z. The two demolding structures 4 are symmetrically arranged between the upper mold plate 1 and the lower mold plate 2 along the first horizontal direction x. The two ejection structures 5 are symmetrically arranged between the upper mold plate 1 and the lower mold plate 2 along the second horizontal direction y. Figure 24 and Figure 26 As shown, when the upper mold plate 1 and the lower mold plate 2 are closed, the upper mold plate 1, the lower mold plate 2, and the two demolding structures 4 together form a cavity A, within which a molded part B with an undercut structure B1 can be formed. The second horizontal direction y is perpendicular to the first horizontal direction x.

[0091] like Figure 7 As shown, the lower template 2 has an upward-opening groove 23, and a shovel base 3 is provided inside the lower template 2. Specifically, the shovel base 3 is located inside the groove 23 and at the center position. Figure 3 As shown, the shovel base 3 has inclined mating surfaces 31 on both sides along the first horizontal direction x. (As...) Figure 4 , Figure 5 and Figure 8As shown, two punch cores 13 protrude downwards from the bottom surface of the upper template 1, symmetrically arranged along the second horizontal direction y. Parts of the two demolding structures 4 protrude from the bottom surface of the upper template 1, extending between the two punch cores 13 and symmetrically arranged along the first horizontal direction x. The inner sides of the parts of the two demolding structures 4 are provided with inclined surfaces 415, such as... Figure 6 As shown.

[0092] like Figure 24 and Figure 25 As shown, when the upper mold plate 1 and the lower mold plate 2 are closed, the two punch cores 13 and parts of the two demolding structures 4 (i.e., forming parts 412) are simultaneously inserted into the groove 23. The two punch cores 13 are located on both sides of the shovel base 3 along the second horizontal direction y, and the parts of the two demolding structures 4 are located on both sides of the shovel base 3 along the first horizontal direction x, thus jointly surrounding and forming the cavity A. The side of the groove 23 forms the outer surface of the molded part B, and the outer side surfaces of the two punch cores 13 and the outer side surfaces of the parts of the two demolding structures 4 form the inner surface of the molded part B and the profile of the undercut structure B1. The inclined surfaces 415 of the parts of the two demolding structures 4 respectively engage and abut with the two inclined mating surfaces 31 of the shovel base 3. The shovel base 3 can achieve abutment and positioning of the demolding structures 4 in the first horizontal direction x, ensuring that the demolding structures 4 will not move along the first horizontal direction x during injection molding, thus improving the molding effect of the molded part B.

[0093] In one embodiment, the groove 23 is a circular groove, and a frustum structure 32 is provided below the shovel base 3, with part of the frustum structure 32 extending into the groove 23, such as... Figure 3 As shown. The outer surfaces of the two punch cores 13 and the outer surfaces of parts of the two demolding structures 4 surround and form a cylindrical surface. The cylindrical surface is larger than the area of ​​the frustum structure 32, thus forming a shape as shown. Figure 24 Cavity A shown can be molded as follows: Figure 22 The molded part B shown.

[0094] When the upper mold plate 1 and the lower mold plate 2 are opened, the two demolding structures 4 move and the molded part B in the cavity A is demolded by inverting, and the two ejection structures 5 move to demold the molded part B from the upper mold plate 1.

[0095] Specifically, the demolding structure 4 includes a slider 41 and a first drive block 42, such as... Figure 25 As shown. The slider 41 is slidably mounted on the upper template 1 along the first horizontal direction x, and the lower half of the slider 41 extends from below the bottom surface of the upper template 1, as shown. Figure 4 and Figure 6 As shown; the first driving block 42 is fixedly connected to the lower template 2, and the top (i.e., the upper half) of the first driving block 42 extends above the lower template 2. The first driving block 42 is located outside the groove 23, as shown. Figure 1 and Figure 3 As shown. The outer surface of the slider 41 (i.e., the side facing the first driving block 42 along the first horizontal direction x) is provided with a driving groove 410, specifically located in the upper half of the slider 41, as shown... Figure 6 As shown. A driving part 421 protrudes from one side of the top (i.e., upper half) of the first driving block 42. Specifically, the driving part 421 is located on the side of the upper half of the first driving block 42 facing the slider 41 along the first horizontal direction x. Figure 3 As shown. Preferably, the driving part 421 is flush with the top surface of the first driving block 42. The slider 41 has an inclined surface 415 near the bottom surface that engages with the inclined mating surface 31 of the shovel base 3.

[0096] When the upper mold plate 1 and the lower mold plate 2 are closed, the first drive block 42 is located outside the slider 41 along the first horizontal direction x, as shown below. Figure 25 As shown. Specifically, the lower halves of the two sliders 41 are simultaneously inserted into the groove 23, located on both sides of the shovel base 3 along the first horizontal direction x, thereby forming cavity A together with the punch core 13. The inclined surfaces 415 of the two sliders 41 near the bottom surface respectively abut against the two inclined mating surfaces 31 of the shovel base 3. The lower half of the slider 41 is provided with a forming block 413, the outer end face of which forms the profile of the undercut structure B1. Simultaneously, the top of the first driving block 42 extends into the upper template 1, and the driving part 421 is located within the driving groove 410. During mold opening, the driving part 421 can slide along the height direction z within the driving groove 410, and when the driving part 421 moves out from below the driving groove 410, it pushes the slider 41 to move inward along the first horizontal direction x, thereby causing the slider 41 (i.e., the forming block 413) to disengage from the undercut structure B1 (i.e., the groove-like structure on the side of the molded part B) of the molded part B.

[0097] like Figure 12 and Figure 13 As shown, the slider 41 includes a sliding body 411 and a forming part 412 fixed below the sliding body 411. The sliding body 411 is slidably disposed within the upper template 1 along a first horizontal direction x, and the forming part 412 extends from below the bottom surface of the upper template 1, as shown. Figure 6 As shown. The driving groove 410 is located on the outer surface of the sliding body 411, the forming block 413 is located on the outer surface of the forming part 412, and the inclined surface 415 is located on the inner side of the forming part 412 near the bottom surface. That is, the sliding body 411 and the forming part 412 respectively constitute the upper and lower halves of the slider 41. The bottom surface of the sliding body 411 is flush with the bottom surface of the upper mold plate 1, and during mold closing, the bottom surface of the sliding body 411, the bottom surface of the upper mold plate 1, and the bottom surface of the ejector structure 5 (i.e., the ejector block 52) together cover the groove 23, forming the top surface of the cavity A.

[0098] Furthermore, the bottom surface of the drive groove 410 (here referring to the lowest surface along the height direction z) is set as a first transmission inclined surface 4101, and the bottom surface of the drive part 421 is provided with a first drive inclined surface 4211 (here, the two edges of the first drive inclined surface 4211 are connected to the bottom surface and the outer surface respectively, forming a chamfer of the drive part 421), such as Figure 12 and Figure 13 As shown. When the driving unit 421 moves relative to the first driving inclined surface 4211 within the driving groove 410 along the height direction z (from no contact to just contact between the first driving inclined surface 4211 and the first transmission inclined surface 4101), the slider 41 and the shovel base 3 move relative to each other along the height direction z to separate. At this time, a gap is formed between the slider 41 (i.e., the forming part 412) and the shovel base 3 to provide space for the subsequent inward movement of the slider 41 along the first horizontal direction x, such as... Figure 31 As shown. When the drive unit 421 continues to move relative to the first drive inclined surface 4211 after contacting the first transmission inclined surface 4101 of the drive groove 410, the drive unit 421 drives the slider 41 to move inward along the first horizontal direction x through the cooperation of the first drive inclined surface 4211 and the first transmission inclined surface 4101, thereby causing the molding block 413 on the slider 41 to extend out of the undercut structure B1 of the molding part B, completing the undercut demolding.

[0099] It should be noted that the distance that the drive unit 421 and the drive groove 410 move relative to each other only along the height direction z is sufficient to ensure that the lateral distance after the slider 41 and the shovel base 3 separate relative to each other along the height direction z is enough for the subsequent forming block 413 to be fully extended from the undercut structure B1. The inclination relationship and area of ​​the first drive inclined surface 4211 and the first transmission inclined surface 4101 are such that the forming block 413 can be fully extended from the undercut structure B1 from the moment they are in complete contact until the first drive inclined surface 4211 and the first transmission inclined surface 4101 are just completely separated.

[0100] like Figure 6 As shown, the demolding structure 4 also includes an elastic positioning element 43, through which the slider 41 can be connected to the upper template 1. The elastic positioning element 43 is used to limit and fix the slider 41 at different positions in the lateral direction to meet different needs. For example, during mold closing, the elastic positioning element 43 limits and fixes the slider 41 at a lateral position where the molding part 412 and the molding block 413 form part of the cavity A, thereby improving product yield; after undercut demolding, the elastic positioning element 43 limits and fixes the slider 41 at a lateral position where the molding block 413 is completely separated from the undercut structure B1, which can avoid affecting the subsequent demolding of the molding part B and the punch core 13.

[0101] like Figure 12 and Figure 13As shown, the slider 41 also includes a limiting plate 414, fixed above the sliding body 411, and extending outward along the first horizontal direction x to the outside of the sliding body 411. When the slider 41 is installed in the upper template 1, the limiting plate 414 is used to restrict the slider 41 from moving along the height direction z, so that the slider 41 can only move laterally. The top surface of the slider 41 includes two limiting grooves 4141, that is, the top surface of the limiting plate 414 includes two limiting grooves 4141, and the two limiting grooves 4141 are arranged side by side along the first horizontal direction x, as shown... Figure 12 and Figure 13 As shown. Figure 6 As shown, one end of the elastic positioning member 43 is fixed on the upper template 1, and the other end can be connected between two limiting grooves 4141 when the slider 41 moves laterally in the first horizontal direction x, thereby limiting the slider 41 to different positions.

[0102] like Figure 23 As shown, the elastic positioning member 43 includes a housing 431, an elastic member 432, and a positioning bead 433. The positioning bead 433 is connected to the housing 431 via the elastic member 432. When subjected to pressure or resistance, the positioning bead 433 compresses the elastic member 432 to move back into the housing 431. In this embodiment, the housing 431 is longitudinally fixed to the upper template 1. When the slider 41 moves laterally to either of the two limiting grooves 4141 corresponding to the positioning bead 433, the positioning bead 433 extends into the limiting groove 4141 under the action of the elastic member 432, thereby limiting the slider 41. When the slider 41 moves laterally to the middle position of the two limiting grooves 4141 corresponding to the positioning bead 433, the positioning bead 433 encounters resistance, compresses the elastic member 432, and moves back into the housing 431. That is, the positioning bead 433 moves between the two limiting grooves 4141 under the action of the elastic member 432.

[0103] Furthermore, the upper template 1 includes two sets of first mounting grooves 11 symmetrically arranged along the first horizontal direction x, and the lower template 2 includes two sets of second mounting grooves 21 symmetrically arranged along the first horizontal direction x. The two sets of second mounting grooves 21 are located outside the groove 23, as shown below. Figure 7 and Figure 8 As shown. During mold closing, the two sets of first mounting grooves 11 are respectively connected to the grooves 23 and the two sets of second mounting grooves 21. Specifically, two sliders 41 are slidably disposed within the two sets of first mounting grooves 11, and two first driving blocks 42 are respectively fixed within the two sets of second mounting grooves 21, as shown. Figure 3 and Figure 6 As shown. During mold closing, the top of the first drive block 42 extends from the second mounting groove group 21 and into the corresponding first mounting groove group 11, and the drive part 421 is engaged and connected in the drive groove 410; the lower half of the slider 41 extends into the groove 23, as shown. Figure 25 As shown.

[0104] The first mounting slot group 11 includes a first mounting slot 111, a second mounting slot 112, and a third mounting slot 113. The second mounting slot 112 and the third mounting slot 113 are arranged side by side below the first mounting slot 111 and both penetrate the bottom surface of the upper template 1. The second mounting slot 112 is connected to the first mounting slot 111 above it. The third mounting slot 113 is located outside the second mounting slot 112 and is laterally connected to the second mounting slot 112. The second mounting slot group 21 includes a fourth mounting slot 211 that communicates with the third mounting slot 113. Figure 7 and Figure 10 As shown. The limiting plate 414 is installed in the first mounting groove 111, the sliding body 411 is installed in the second mounting groove 112, and the forming part 412 extends from below the second mounting groove 112, as shown. Figure 6 As shown. The first drive block 42 is fixed in the fourth mounting slot 211, and the top of the first drive block 42 protrudes from the fourth mounting slot 211, as... Figure 1 and Figure 3 As shown. The slider 41 is configured to engage with the limiting plate 414 and the first mounting groove 111, ensuring that the slider 41 can only move laterally. During mold closing, the top of the first drive block 42 (the upper half with the drive part 421) extends from the fourth mounting groove 211 and into the third mounting groove 113, and the drive part 421 is engaged in the drive groove 410; the forming part 412 extends into the groove 23.

[0105] In one embodiment, a baffle 14 is provided between the two first mounting slot groups 11, such as... Figure 6 and Figure 10 As shown. The stop bar 14 can help limit the lateral movement distance of the slider 41.

[0106] In this embodiment, the two ejection structures 5 are symmetrically arranged on the outside of the two demolding structures 4 along the second horizontal direction y. Figure 14 , Figure 19 and Figure 20 As shown, the ejector structure 5 includes a fixing block 51, a top block 52, a second driving block 53, and two third driving blocks 54. Figure 5 As shown, the top block 52 is slidably connected to the upper mold plate 1 along the height direction z, and a transmission groove 520 is provided on one side of the top block 52 along the second horizontal direction y. Before and during mold closing, the bottom surface of the top block 52 is flush with the bottom surface of the upper mold plate 1. Figure 1 , Figure 2 and Figure 3As shown, the fixing block 51 is fixedly connected to the lower template 2, and the top (i.e., the upper half) of the fixing block 51 is located above the lower template 2. Specifically, the fixing block 51 is located outside the groove 23 along the second horizontal direction y. The second driving block 53 is slidably connected to the fixing block 51 along the second horizontal direction y. Specifically, the second driving block 53 is located in the upper half of the fixing block 51, as shown... Figure 2 As shown. Figure 15 and Figure 16 As shown, two third driving blocks 54 are fixed on the upper template 1, and the two third driving blocks 54 are symmetrically arranged on both sides of the top block 52 along the first horizontal direction x.

[0107] like Figures 14-16 , Figure 20 As shown, the ejector structure 5 also includes two first elastic elements 55 and a second elastic element 56. The two first elastic elements 55 are symmetrically connected between the top block 52 and the upper template 1, and the second elastic element 56 is connected between the fixing block 51 and the second driving block 53.

[0108] During mold closing, the ejector block 52 is located directly above cavity A. The upper half of the fixing block 51 extends into the upper mold plate 1 and is located outside the ejector block 52 and the two third drive blocks 54 along the second horizontal direction y. The transmission groove 520 is located on the side of the ejector block 52 facing the fixing block 51. The second drive block 53 extends into the transmission groove 520. Figure 24 As shown. The bottom surface of the top block 52, the bottom surface of the upper template 1, the bottom surface of the slider 41, the groove 23, the punch core 13, and the shovel base 3 together surround and form cavity A, as shown. Figure 24 and Figure 25 As shown.

[0109] During the mold opening process, the second driving block 53 can slide along the height direction z within the transmission groove 520. When the second driving block 53 moves to contact the bottom surface of the transmission groove 520 and continues to move, the second driving block 53 drives the top block 52 to move downwards along the height direction z. The top block 52 pushes the molded part B downwards to disengage from the upper template 1 (specifically, the punch core 13). Figure 41 As shown. It should be noted that before the second drive block 53 moves to contact the bottom surface of the transmission groove 520, it will not interfere with the movement of the demolding structure 4. Before this, the demolding structure 4 has already completed the undercut demolding, that is, the drive part 421 has completed sliding in the drive groove 410 and completely moving out of the drive groove 410. At this time, the slider 41 is restricted by the elastic positioning member 43 to the position of completely undercut demolding with the molded part B. This ensures that during the subsequent process of the second drive block 53 pushing the molded part B downward through the top block 52, the undercut structure B1 of the molded part B will not interfere with the slider 41, and the demolding process of the molded part B and the punch core 13 can be completed smoothly.

[0110] During the process of the second drive block 53 pushing the top block 52 downward along the height direction z, the third drive block 54 begins to contact the second drive block 53, such as... Figure 42 As shown; and while the second drive block 53 continues to push the top block 52 downward along the height direction z, the third drive block 54 pushes the second drive block 53 to move outward synchronously along the second horizontal direction y, until the second drive block 53 and the transmission groove 520 of the top block 52 are completely disengaged. Under the action of the first elastic element 55, the top block 52 moves upward and resets to its initial position. At this time, the second drive block 53 and the third drive block 54 are disengaged, and the outer side of the second drive block 53 abuts against the outer side of the top block 52 located below the transmission groove 520. During the continued mold opening process, the outer side of the second drive block 53 and the outer side of the top block 52 gradually begin to separate until they are completely separated. Under the action of the second elastic element 56, the second drive block 53 moves along the second horizontal direction y and resets to its initial position. The upper mold plate 1, carrying the molded part B, and the lower mold plate 2 complete the overall demolding.

[0111] like Figure 20 As shown, the fixed block 51 includes a movable groove 511 extending along the second horizontal direction y. A cover plate 512 is fixed to the side of the movable groove 511 away from the top block 52. The second driving block 53 is movably disposed within the movable groove 511. The second elastic element 56 is located within the movable groove 511 and connected between the cover plate 512 and the second driving block 53. Figure 21 As shown, the second drive block 53 includes a drive plane 531 and two second transmission inclined surfaces 532, which are symmetrically arranged on both sides of the drive plane 531. The drive plane 531 forms part of the bottom surface of the second drive block 53, and the two ends of the second transmission inclined surfaces 532 are respectively inclinedly connected to the bottom surface and the outer surface of the second drive block 53. The second transmission inclined surfaces 532 can also be understood as being formed by two notches near the bottom of the outer surface of the second drive block 53.

[0112] like Figure 17 As shown, the top block 52 includes a top block body 521, two guide plates 522 and a baffle 523. The two guide plates 522 are symmetrically arranged on both sides of the top block body 521 along the first horizontal direction x. The baffle 523 is fixed above the top block body 521 and the two guide plates 522. The two ends of the baffle 523 extend outward along the first horizontal direction x to the outside of the two guide plates 522. The top block body 521 has a transmission groove 520 on the outer side facing the fixed block 51. The bottom surface of the transmission groove 520 is set as a transmission plane 5201.

[0113] like Figure 18As shown, the third drive block 54 includes a guide groove 541 with a lateral opening and a second drive ramp 542. The second drive ramp 542 is located on the side of the third drive block 54 facing the fixed block 51. When the top block 52 and the third drive block 54 are installed on the upper template 1, the two guide plates 522 slide in the two guide grooves 541 respectively. The second drive ramps 542 of the two third drive blocks 54 are located on both sides of the top block body 521 and close to the bottom end of the transmission groove 520, as shown. Figure 15 and Figure 16 As shown. In the initial state, the two second driving ramps 542 are located below the transmission plane 5201 of the transmission groove 520 along the height direction z.

[0114] During mold closing, the driving plane 531 of the second driving block 53 and the driving plane 5201 of the transmission groove 520 are positioned opposite each other along the height direction z, and the two second transmission inclined surfaces 532 of the second driving block 53 and the two second driving inclined surfaces 542 of the third driving blocks 54 are respectively positioned opposite each other along the height direction z. During the mold opening process, when the second driving block 53 and the top block 52 are separated until the driving plane 531 contacts the transmission plane 5201 of the transmission groove 520 and the mold opening continues, the second driving block 53 drives the top block 52 to move downward through the cooperation of the driving plane 531 and the transmission plane 5201. As the mold opening continues, the second driving block 53 continues to drive the top block 52 to move downward until the two second driving inclined surfaces 542 and the two second transmission inclined surfaces 532 contact each other. Then, the second driving block 53 continues to drive the top block 52 to move downward, and the third driving block 54 drives the second driving block 53 to move into the moving groove 511 through the cooperation of the second driving inclined surface 542 and the second transmission inclined surface 532. The second driving block 53 and the transmission plane 5201 of the top block 52 are finally separated. Then, the top block 52 moves upward and resets under the action of the first elastic element 55. As the mold opening continues, when the top block 52 and the second driving block 53 separate in the height direction z, the second driving block 53 resets under the action of the second elastic element 56 and extends out of the moving groove 511 to reset.

[0115] Furthermore, the upper template 1 also includes two sets of first assembly groove groups 12 symmetrically arranged along the second horizontal direction y, and the lower template 2 includes two sets of second assembly groove groups 22 symmetrically arranged along the second horizontal direction y. The two sets of second assembly groove groups 22 are located outside the groove 23, as shown below. Figure 7 As shown. During mold closing, the two sets of second assembly slots 22 are respectively connected to the two sets of first assembly slots 12. Two top blocks 52 and two third drive blocks 54 are respectively disposed within the two sets of first assembly slots 12, and two fixing blocks 51 are respectively fixed within the two sets of second assembly slots 22. During mold closing, the top of the fixing block 51 extends from the second assembly slot 22 and into the corresponding first assembly slot 12, and the second drive block 53 is engaged and connected within the transmission slot 520, as shown. Figure 24 As shown.

[0116] like Figure 9 and Figure 11 As shown, the first assembly slot group 12 includes a first assembly slot 121, a second assembly slot 122, two third assembly slots 123, and a fourth assembly slot 124. The first assembly slot 121 extends along a first horizontal direction x. The second assembly slot 122 is vertically connected to the first assembly slot 121 and the bottom surface of the upper template 1. Guide slots 125 are respectively provided on both sides of the second assembly slot 122 along the first horizontal direction x. The two third assembly slots 123 are arranged parallel to each other below the first assembly slot 121, and the two third assembly slots 123 are laterally connected to the second assembly slot 122. The fourth assembly slot 124 is arranged along a second horizontal direction y outside the first assembly slot 121, and the fourth assembly slot 124 is laterally connected to the first assembly slot 121, the second assembly slot 122, and the two third assembly slots 123. Figure 7 As shown, the second assembly slot group 22 includes a fifth assembly slot 221 that communicates with the fourth assembly slot 124.

[0117] The components include: a baffle 523 installed in the first assembly slot 121; a first elastic element 55 connected between the baffle 523 and the bottom surface of the first assembly slot 121; two third drive blocks 54 fixed in the two third assembly slots 123 respectively; two guide slots 541 correspondingly communicating with the two guide slots 125 respectively; a top block body 521 installed in the second assembly slot 122; and two guide plates 522 connected in the corresponding guide slots 125 and guide slots 541 respectively. The two second drive ramps 542 of the two third drive blocks 54 extend into the second assembly slot 122 and are located on both sides of the top block body 521. A fixing block 51 is fixed in the fifth assembly slot 221, with its top extending from the fifth assembly slot 221 into the fourth assembly slot 124. A second drive block 53 extends from the fourth assembly slot 124 into the transmission slot 520.

[0118] In this embodiment, the elastic element 432, the first elastic element 55, and the second elastic element 56 are springs, and the fixing method can be bolt connection.

[0119] In this embodiment, the inverted mold further includes an upper mold base 6, a lower mold base 7, an upper fixing plate 8, and a stripper plate 9, such as... Figure 26 and Figure 27As shown. The upper mold plate 1 is fixed inside the upper mold base 6, and the lower mold plate 2 is fixed inside the lower mold base 7. The upper fixing plate 8 and the stripper plate 9 are detachably connected, with the upper fixing plate 8 located above the stripper plate 9. The upper fixing plate 8 and the stripper plate 9 together form the main runner. The upper mold base 6 and the upper mold plate 1 are provided with branch runners that communicate with cavity A. During mold closing, the upper fixing plate 8 and the stripper plate 9 are pressed against the upper mold base 6, and the main runner and the branch runners are connected. During injection molding, the injection material enters cavity A through the main runner and the branch runners to form the molded part B. After curing, the sprue C is formed in the main runner and the branch runners.

[0120] The inverted mold of this embodiment is used for injection molding a product with an undercut structure B1. The shovel base 3 can position the slider 41 to ensure that the slider 41 will not move backward during the molding process. At the same time, the inverted mold drives the slider 41 to move inward through the first drive block 42 to achieve demolding of the undercut structure B1, and drives the top block 52 through the second drive block 53 to complete the ejection of the molded part B. The inverted mold has simple operation and can effectively solve the problem of smooth demolding and ejection of undercut products, reduce mold thickness, reduce the length of the sprue C, shorten the molding cycle, reduce production costs, and improve product yield.

[0121] This application also provides an inverted mold demolding method based on the inverted mold described in the above embodiments. Figure 52 As shown, the inverted demolding method includes:

[0122] Step S300: In the first mold opening stage, the upper mold plate 1 and the lower mold plate 2 open, and the two demolding structures 4 move to disengage from the undercut structure B1 of the molded part B in the cavity A, thereby realizing undercut demolding.

[0123] Figure 53 This is a schematic diagram of the undercut demolding method. Figure 53 As shown, step S300 includes:

[0124] Step S310: The upper template 1 moves upward by a first vertical distance L1, the shovel base 3 separates from the slider 41, and the first driving inclined surface 4211 of the first driving block 42 contacts the first transmission inclined surface 4101 of the driving groove 410.

[0125] In this embodiment, the lower mold base 7, its inner lower template 2, the first driving block 42, and the fixing block 51 remain stationary; the upper mold base 6 drives the upper template 1, its inner top block 52, and the slider 41 to move upward by a first vertical distance L1. During injection molding and cooling, the molded part B shrinks inward, causing it to tightly wrap around or adhere to the slider 41 and the punch core 13 of the upper template 1. The groove 23 of the lower template 2 has a draft angle. When the upper template 1 moves upward by the first vertical distance L1, the slider 41 and the punch core 13 together drive the molded part B to move upward by the first vertical distance L1. The shovel base 3 separates from the slider 41. At this time, the first driving inclined surface 4211 of the first driving block 42 contacts the first transmission inclined surface 4101 of the driving groove 410 of the slider 41. Figure 31 As shown. At this time, the second drive block 53 is still located within the transmission groove 520 of the top block 52 and has a certain distance between it and the transmission plane 5201, as shown. Figure 32 and Figure 33 As shown.

[0126] Step S320: The upper template 1 continues to move upward by a second vertical distance L2, and the first driving block 42 pushes the slider 41 to move inward by a first horizontal distance H1 along the first horizontal direction x, so that the slider 41 is completely disengaged from the inverted structure B1.

[0127] Then, the upper mold base 6 drives the upper template 1 and its inner top block 52 and slider 41 to continue moving upward a second vertical distance L2. During this process, the contact area between the first driving inclined surface 4211 of the first driving block 42 and the first transmission inclined surface 4101 of the driving groove 410 gradually decreases. The first driving block 42 gradually pushes the slider 41 to move inward along the first horizontal direction x until the contact area between the first driving inclined surface 4211 of the first driving block 42 and the first transmission inclined surface 4101 of the driving groove 410 is 0. At this time, the slider 41 moves inward a first horizontal distance H1 along the first horizontal direction x. At this time, the slider 41 is completely disengaged from the undercut structure B1 of the molded part B. Figure 34 As shown. At this time, the slider 41 is locked in the undercut position after lateral movement by the elastic positioning member 43. During the subsequent mold opening process, the first drive block 42 will no longer apply a pushing force to the slider 41. Therefore, the first drive block 42 and the slider 41 will not affect the movement of the subsequent ejection structure 5. At this time, the second drive block 53 is still located in the transmission groove 520 of the top block 52 and the drive plane 531 is still not in contact with the transmission plane 5201, as shown. Figures 35-36 As shown.

[0128] Step S400: In the second mold opening stage, the upper mold plate 1 and the lower mold plate 2 continue to open, and the two ejector structures 5 move and push the molded part B to detach from the upper mold plate 1, completing the overall demolding.

[0129] Figure 54 This is a schematic diagram illustrating the overall demolding method. (Example) Figure 54 As shown, step S400 includes:

[0130] Step S410: The upper template 1 continues to move upward by a third vertical distance L3, and the driving plane 531 of the second driving block 53 and the transmission plane 5201 of the top block 52 come into contact.

[0131] The upper template 1 continues to move upward a third vertical distance L3, and the driving plane 531 of the second driving block 53 and the transmission plane 5201 of the top block 52 come into contact, as... Figure 38 As shown; at this time, there is still a certain distance between the second transmission inclined surface 532 of the second drive block 53 and the second drive inclined surface 542 of the third drive block 54, as shown. Figure 39 As shown. During this process, the position between the first driving block 42 and the slider 41 along the first horizontal direction remains unchanged, and the slider 41 remains completely disengaged from the inverted structure B1; while the contact area between the outer surface of the first driving block 42 and the outer surface of the slider 41 located below the driving groove 410 gradually increases, as shown. Figure 37 As shown.

[0132] Step S420: The upper template 1 continues to move upward by a fourth vertical distance L4. The second drive block 53 pushes the top block 52 downward by a fourth vertical distance L4. The top block 52 pushes the molded part B downward by a fourth vertical distance L4. The second drive slope 542 of the third drive block 54 contacts the second transmission slope 532 of the second drive block 53.

[0133] The upper template 1 continues to move upward a fourth vertical distance L4. The second drive block 53, through the cooperation of the drive plane 531 and the transmission plane 5201, pushes the top block 52 downward a fourth vertical distance L4. The top block 52 pushes the molded part B downward a fourth vertical distance L4. Figures 40-41 As shown. Simultaneously, the second driving ramp 542 of the third driving block 54 contacts the second transmission ramp 532 of the second driving block 53, as... Figure 42 As shown.

[0134] Step S430: The upper template 1 continues to move upward by a fifth vertical distance L5. The second drive block 53 pushes the top block 52 to continue moving downward by a fifth vertical distance L5. The top block 52 pushes the molded part B to continue moving downward by a fifth vertical distance L5. The third drive block 54 pushes the second drive block 53 to move outward by a second horizontal distance H2 along the second horizontal direction y, disengaging from the transmission plane 5201. The top block 52 moves upward to reset.

[0135] The upper template 1 continues to move upward a fifth vertical distance L5. The second driving block 53, through the cooperation of the driving plane 531 and the transmission plane 5201, continues to push the top block 52 downward a fifth vertical distance L5. The top block 52 pushes the molded part B downward a fifth vertical distance L5. At this time, the third driving block 54, through the cooperation of the second driving inclined surface 542 and the second transmission inclined surface 532, synchronously pushes the second driving block 53 outward along the second horizontal direction y (into the moving groove 511) a second horizontal distance H2, so that the driving plane 531 of the second driving block 53 disengages from the transmission plane 5201 of the top block 52. Figure 43 , Figure 44 and Figure 45 As shown. Since the second driving block 53 no longer restricts the top block 52, the top block 52 moves upward and resets to its initial state under the action of the first elastic element 55, as shown. Figure 46 As shown. After the top block 52 is reset, the outer side of the second drive block 53 abuts against the outer side of the top block 52 located below the transmission plane 5201.

[0136] Step S440: The upper template 1 continues to move upward by a sixth vertical distance L6, the outer side of the second driving block 53 separates from the outer side of the top block 52, and the second driving block 53 moves horizontally outward to reset.

[0137] The upper template 1 continues to move upward a sixth vertical distance L6, and the outer side of the second driving block 53 separates from the outer side of the top block 52, as shown. Figure 47 and Figure 48 As shown. Specifically, the top corner of the second driving block 53 is separated from the bottom corner of the top block 52. In this embodiment, there is a chamfer here, and the top block 52 can still abut against the second driving block 53; if the top corner of the second driving block 53 and the bottom corner of the top block 52 are right angles, then the top block 52 is located above the second driving block 53 and no longer abuts against the second driving block 53. The second driving block 53 moves outward and resets to its initial state under the action of the second elastic element 56. At the same time, the third driving block 54 is located above the second driving block 53, as shown. Figure 49 As shown.

[0138] At this point, it is necessary to continue controlling the upper template 1 to move upwards, so that all structures on the upper template 1 separate from all structures on the lower template 2, achieving overall demolding. Figures 50-51 Finally, the molded part B can be removed from the punch core 13 manually or with a tool.

[0139] like Figure 52 As shown, the inverted demolding method includes:

[0140] Step S100: Separate and open the upper fixing plate 8 and stripper plate 9 from the upper mold base 6.

[0141] After injection molding and curing, the upper fixing plate 8 and stripper plate 9 need to be opened and separated from the upper mold base 6 to pull the sprue C out of the runner, thus separating the sprue C from the molded part B. Figure 26 and Figure 27 As shown.

[0142] Step S200: Separate and open the upper fixing plate 8 and the stripping plate 9.

[0143] like Figure 28 , Figure 29 , Figure 30 As shown, after the sprue C is pulled out from the manifold, the upper fixing plate 8 and the stripper plate 9 are separated and opened, so that the sprue C is separated from the main manifold, making it easier to remove the sprue C for the next injection molding.

[0144] This application discloses an inverted mold and an inverted demolding method. When the upper mold plate 1 and the lower mold plate 2 are closed, the upper mold plate 1, the lower mold plate 2, the shovel base 3, and the two demolding structures 4 together form a cavity A with an undercut structure B1. When the upper mold plate 1 and the lower mold plate 2 are opened, the two demolding structures 4 move to undercut and demold the molded part B in the cavity A, and the two ejection structures 5 move to demold the molded part B from the upper mold plate 1. This inverted mold can release the undercut first during the mold opening process, and then complete the ejection and separation, ensuring that the molded part B is demolded smoothly, meeting the needs of efficient and automated production.

[0145] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An inverted mold, characterized in that, The inverted mold includes: Upload template; The lower template is located below the upper template, and a shovel base is provided inside the lower template; Two demolding structures are symmetrically arranged between the upper template and the lower template along a first horizontal direction; Two ejector structures are symmetrically arranged between the upper template and the lower template along a second horizontal direction, which is perpendicular to the first horizontal direction. When the upper mold and the lower mold are closed, the upper mold, the lower mold, the shovel base, and the two demolding structures together form a cavity; When the upper and lower mold plates open, the two demolding structures move to disengage the molded part inside the cavity, and the two ejection structures move to demold the molded part from the upper mold plate.

2. The inverted mold according to claim 1, characterized in that, The demolding structure includes: A slider is slidably disposed on the upper template along the first horizontal direction, and a drive groove is provided on the outer side of the slider; The first driving block is fixedly connected to the lower template, and the top of the first driving block extends above the lower template. The top of the first driving block has a driving part protruding towards the slider. The driving part is slidably disposed in the driving groove along the height direction, and when the driving part moves out of the driving groove, it pushes the slider to move along the first horizontal direction, so that the slider disengages from the undercut structure of the molded part.

3. The inverted mold according to claim 2, characterized in that, The slider includes a sliding body and a forming part fixed below the sliding body. The driving groove is provided on the outer side of the sliding body. The outer side of the forming part is provided with a forming block. The outer end face of the forming block forms the profile of the inverted structure.

4. The inverted mold according to claim 2 or 3, characterized in that, The bottom surface of the drive groove is set as a first transmission inclined surface, and the bottom surface of the drive part is provided with a first drive inclined surface. The drive part drives the slider to move along the first horizontal direction through the cooperation of the first drive inclined surface and the first transmission inclined surface.

5. The inverted mold according to claim 3, characterized in that, The slider also includes a limiting plate, which is fixed above the sliding body and extends outward along the first horizontal direction to the outside of the sliding body. The top surface of the limiting plate includes two limiting grooves arranged side by side along the first horizontal direction. The demolding structure also includes an elastic positioning element installed on the upper template. The elastic positioning element includes a housing, an elastic element, and a positioning bead. The positioning bead is connected to the housing through the elastic element. During the movement of the slider along the first horizontal direction, the positioning bead moves between the two limiting grooves under the action of the elastic element.

6. The inverted mold according to claim 5, characterized in that, The upper template includes two sets of first mounting slots symmetrically arranged along the first horizontal direction, and the lower template includes two sets of second mounting slots symmetrically arranged along the first horizontal direction. The two sets of second mounting slots are respectively connected to the two sets of first mounting slots. The two sliders are slidably disposed in the two sets of the first mounting slots, and the two first driving blocks are fixed in the two sets of the second mounting slots. The top of the first driving block extends out of the second mounting slot and into the corresponding first mounting slot, so that the driving part is engaged and connected in the driving slot.

7. The inverted mold according to claim 6, characterized in that, The first mounting slot group includes a first mounting slot, a second mounting slot, and a third mounting slot. The second mounting slot and the third mounting slot are arranged side by side below the first mounting slot. The second mounting slot connects the first mounting slot and the bottom surface of the upper template. The third mounting slot is located outside the second mounting slot and is laterally connected to the second mounting slot. The second mounting slot group includes a fourth mounting slot that is connected to the third mounting slot. The limiting plate is installed in the first mounting groove, the sliding body is installed in the second mounting groove, the forming part extends out from the bottom of the second mounting groove, the first driving block is fixed in the fourth mounting groove, and the top of the first driving block extends out from the fourth mounting groove and into the third mounting groove.

8. The inverted mold according to claim 1, characterized in that, The ejection structure includes: A fixing block is fixedly connected to the lower template, and the top of the fixing block extends above the lower template; The top block is slidably connected to the upper template along the height direction and located above the cavity. The top block is located inside the fixed block along the second horizontal direction, and the top block is provided with a transmission groove on the outer side facing the fixed block. The second driving block is slidably connected to the fixed block along the second horizontal direction; The second driving block is slidably disposed in the transmission groove along the height direction. When the second driving block moves to contact the bottom surface of the transmission groove and continues to move, it drives the top block to move downward along the height direction to push the molded part to demold from the upper template.

9. The inverted mold according to claim 8, characterized in that, The ejection structure also includes two third driving blocks, which are fixed on the upper template and are symmetrically arranged on both sides of the top block. As the second driving block drives the top block to move downward along the height direction, the third driving block pushes the second driving block to move outward synchronously along the second horizontal direction and disengage from the top block.

10. The inverted mold according to claim 9, characterized in that, The ejection structure further includes: Two first elastic elements are symmetrically connected between the top block and the upper template. The top block moves upward and resets under the force of the two first elastic elements. A second elastic element is connected between the fixed block and the second driving block, and the second driving block is moved and reset by the force of the second elastic element.

11. The inverted mold according to claim 10, characterized in that, The top block includes a top block body, two guide plates and a baffle. The two guide plates are symmetrically arranged on both sides of the top block body along the first horizontal direction. The baffle is fixed above the top block body and the two guide plates. The two ends of the baffle extend outward along the first horizontal direction to the outside of the two guide plates. The top block body has a transmission groove on its outer side facing the fixed block, and the bottom surface of the transmission groove is set as a transmission plane.

12. The inverted mold according to claim 11, characterized in that, The third driving block includes a guide groove with a lateral opening and a second driving inclined surface, the second driving inclined surface being disposed on the side of the third driving block facing the fixed block; The two guide plates are slidably disposed in the two guide grooves respectively, and the second driving inclined surfaces of the two third driving blocks are symmetrically disposed on both sides of the bottom surface of the transmission groove.

13. The inverted mold according to claim 12, characterized in that, The second drive block includes a drive plane and two second transmission inclined planes, which are symmetrically arranged on both sides of the drive plane. The driving plane and the transmission plane cooperate to drive the top block to move downward, and the two second driving inclined surfaces and the two second transmission inclined surfaces cooperate to drive the second driving block to move outward along the second horizontal direction and disengage from the transmission groove.

14. The inverted mold according to claim 13, characterized in that, The fixed block includes a movable groove that extends along the second horizontal direction. A cover plate is fixed to the movable groove on the side away from the top block. The second driving block is movably disposed in the movable groove. The second elastic element is located in the movable groove and connected between the cover plate and the second driving block.

15. The inverted mold according to claim 14, characterized in that, The upper template also includes two sets of first assembly slots symmetrically arranged along the second horizontal direction, and the lower template includes two sets of second assembly slots symmetrically arranged along the second horizontal direction. The two sets of second assembly slots are respectively connected to the two sets of first assembly slots. The two top blocks and the two third drive blocks are respectively disposed in the two sets of the first assembly slots, the two fixing blocks are respectively fixed in the two sets of the second assembly slots, and the fixing blocks extend from the second assembly slots and extend into the corresponding first assembly slots. The second drive blocks are connected in the transmission slots.

16. The inverted mold according to claim 15, characterized in that, The first assembly slot group includes a first assembly slot, a second assembly slot, two third assembly slots, and a fourth assembly slot. The first assembly slot extends along a first horizontal direction. The second assembly slot is vertically connected to the first assembly slot and the bottom surface of the upper template. Guide slots are provided on both sides of the second assembly slot along the first horizontal direction. The two third assembly slots are arranged parallel to each other below the first assembly slot and are laterally connected to the second assembly slot. The fourth assembly slot is arranged along a second horizontal direction outside the first assembly slot and is laterally connected to the first assembly slot, the second assembly slot, and the two third assembly slots. The second assembly slot group includes a fifth assembly slot connected to the fourth assembly slot. The baffle is installed in the first assembly slot, the first elastic element is connected between the baffle and the bottom surface of the first assembly slot, the two third drive blocks are respectively fixed in the two third assembly slots, and the two guide slots are respectively connected to the two guide slots, the top block body is installed in the second assembly slot, the two guide plates are respectively connected to the corresponding guide slots, the fixing block is fixed in the fifth assembly slot and the top of the fixing block extends out of the fifth assembly slot and into the fourth assembly slot, and the second drive block extends out of the fourth assembly slot and into the transmission slot.

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