A release structure and demolding device

Abstract

This utility model belongs to the field of demolding technology, and discloses a release structure and demolding device. The release structure includes an inner core, an outer core, a guide sleeve, and a guide post. The inner core passes through the guide sleeve and the outer core, and is slidably engaged with both the guide sleeve and the outer core. The guide sleeve is located on the side of the outer core away from the snap-fit ​​hole. The inner core is circumferentially confined to the outer core, and the inner core and the outer core can rotate synchronously relative to the guide sleeve. The guide sleeve has a first guide groove and a second guide groove that are connected. The first guide groove extends along a first direction and is located at the end of the second guide groove away from the outer core. The second guide groove extends spirally. The guide post is connected to the inner core and is slidably engaged with the first guide groove and the second guide groove. The outer core is used to release from the snap-fit ​​hole along the first direction, and the inner core is used to release from the snap-fit ​​hole along its own circumference. The first direction is the sliding direction of the inner core. This release structure can prevent the relative position between the inner and outer cores along the circumference from shifting during release, ensuring the molding quality of the plastic part.

Description

Technical Field

[0001] This utility model relates to the field of demolding technology, and in particular to a release structure and demolding device. Background Technology

[0002] Products with plastic parts are extremely common in industry, such as the plastic housings of low-voltage electrical appliances. Some plastic parts have a cylindrical structure with buckles on the inner wall and notches on the side walls that communicate with the internal space of the cylindrical structure. When injection molding this plastic part, the buckles are usually formed by an inner core and the notches are formed by an outer core, with the outer core fitting onto the inner core.

[0003] To achieve smooth demolding, the relevant technology first moves the inner core relative to the outer core, lifting the plastic part and demolding it from the outer core. Then, the inner core is rotated to disengage the inner core from the snap-fit. After disengagement, the inner core can be pulled out from the plastic part's cylindrical structure. However, during the rotation of the inner core, the structures on the inner core used to form the snap-fit ​​and the structures on the outer core used to form the notch are prone to misalignment in the circumferential direction. This can cause the relative positions of the snap-fit ​​and notch formed on the plastic part to shift, affecting the quality of the plastic part and ultimately preventing smooth installation with related components.

[0004] Therefore, there is an urgent need for a release structure and a release device to solve the above-mentioned problems existing in the prior art. Utility Model Content

[0005] The purpose of this invention is to provide a release structure and demolding device that, while enabling smooth demolding of the plastic part, avoids the relative positional shift between the inner core and the outer core along the circumferential direction, thus ensuring the molding quality of the plastic part.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] In a first aspect, a release structure is provided, which is used to release the snap-fit ​​hole of a plastic part. The release structure includes an inner core, an outer core, a guide sleeve, and a guide post.

[0008] The inner core passes through the guide sleeve and the outer core, and slides in cooperation with the guide sleeve and the outer core. The guide sleeve is located on the side of the outer core away from the snap-fit ​​hole. The inner core is circumferentially limited to the outer core, and the inner core and the outer core can rotate synchronously relative to the guide sleeve.

[0009] The guide sleeve is provided with a first guide groove and a second guide groove that are interconnected. The first guide groove extends along a first direction and is located at the end of the second guide groove away from the outer core. The second guide groove extends in a spiral shape.

[0010] The guide post is connected to the inner core and slides in cooperation with the first guide groove and the second guide groove;

[0011] The outer core is used to disengage from the snap-fit ​​hole along the first direction, and the inner core is used to disengage from the snap-fit ​​hole along its own circumference; wherein, the first direction is the sliding direction of the inner core.

[0012] As an optional solution to the release structure provided by this utility model, the release structure further includes a push rod, which is connected to the inner core and extends out of the guide sleeve at one end away from the outer core;

[0013] The push rod and the guide sleeve are slidably engaged along the first direction, and the push rod and the guide sleeve are rotatably engaged.

[0014] As an optional solution to the tripping structure provided by this utility model, the tripping structure further includes a mounting base;

[0015] The first end of the mounting base is provided with a first slot, the inner core is engaged in the first slot along the first direction, and the guide post penetrates the mounting base and the inner core along the radial direction of the inner core.

[0016] The second end of the mounting base is provided with a second slot, and the inner wall of the second slot is provided with a first step structure; the end face of the push rod is provided with a locking block, and the locking block is provided with a second step structure. The second step structure abuts against the first step structure in the first direction, and the second slot has an installation opening for the locking block to be inserted into the second slot radially along the guide post.

[0017] As an optional solution to the tripping structure provided by this utility model, the guide sleeve includes a first half-shell and a second half-shell;

[0018] The first half-shell is provided with a first half-hole and a first half-groove and a second half-groove communicating with the first half-hole; the second half-shell is provided with a second half-hole and a third half-groove and a fourth half-groove communicating with the second half-hole.

[0019] The first half-shell and the second half-shell are engaged, the first half-hole and the second half-hole form a through hole for inserting the inner core, the first half-groove and the third half-groove form the first guide groove, and the second half-groove and the fourth half-groove form the second guide groove.

[0020] As an optional solution to the release structure provided by this utility model, the outer core is provided with a fitting hole for the inner core to pass through, and the cross-section of the fitting hole and the cross-section of the inner core are both non-circular.

[0021] In a second aspect, a demolding device is provided, including a lifting seat, a pushing mechanism, at least one first ejector pin, and a release structure as described above;

[0022] The end of the inner core of the release structure away from the plastic part is connected to the lifting seat;

[0023] The pushing mechanism is connected to the lifting seat and is at least partially located on the side of the lifting seat facing away from the plastic part;

[0024] When the first ejector pin is connected to the lifting seat and the guide post is located in the second guide groove, the first ejector pin is used to insert into the plastic part.

[0025] As an optional solution of the demolding device provided by this utility model, the lifting seat includes a first needle plate and a second needle plate located on the side of the first needle plate facing the plastic part;

[0026] The push mechanism is slidably disposed on the first needle plate and connected to the second needle plate; the inner core and the first ejector pin are both connected to the first needle plate, and at least one second ejector pin for supporting the plastic part is connected to the second needle plate;

[0027] The first needle plate is connected to a first locking block, and the second needle plate is connected to a second locking block; the guide sleeve is provided with a third guide groove that cooperates with the guide post, and the third guide groove is connected to the end of the second guide groove away from the first guide groove;

[0028] When the guide post is located within the first guide groove and the second guide groove, the second locking block is locked to the first locking block; when the guide post is located within the third guide groove, the second locking block is unlocked from the first locking block.

[0029] As an optional solution of the demolding device provided by this utility model, the first locking block is provided with a first buckle, the second locking block slides in cooperation with the second needle plate along the second direction, and the second locking block is provided with a second buckle and a first pushing surface at intervals; the second buckle engages with the first buckle to lock or separates to unlock.

[0030] The demolding device further includes an unlocking component, which has a second pushing surface that slides in cooperation with the first pushing surface. The unlocking component pushes the second locking block through the cooperation of the second pushing surface and the first pushing surface, thereby separating the second buckle from the first buckle.

[0031] As an optional solution of the demolding device provided by this utility model, an elastic element is connected between the second locking block and the second needle plate, and the second locking block can be engaged with the first locking block under the elastic force of the elastic element.

[0032] And / or, the second lock block is provided with a lock hole, the inner wall of the lock hole is provided with the first abutting surface, and the unlocking member is inserted into or disengaged from the lock hole;

[0033] And / or, the first needle plate is provided with a first groove, the second needle plate is provided with a second groove, the first end of the first locking block is engaged in the first groove, the second end of the first locking block is engaged in the second groove, and is provided with the first buckle.

[0034] As an optional solution of the demolding device provided by this utility model, the second needle plate includes a first plate body and a second plate body, and the second plate body is located between the first plate body and the first needle plate.

[0035] The first plate has a first through hole for the unlocking member to pass through; the second plate has a groove recessed on the side facing the first plate, the second locking block slides with the groove, and has an oblong hole extending along the second direction; the second plate has a connector that slides with the oblong hole.

[0036] The beneficial effects of this utility model are:

[0037] This invention provides a release structure. Because the inner core rotates and releases from the snap-fit ​​hole of the plastic part along its circumferential direction, and the outer core moves relative to the guide sleeve and releases from the snap-fit ​​hole, the inner core cannot directly rotate to release during release, thus avoiding damage to the snap-fit ​​hole after molding. When releasing using this structure, the inner core is first moved along a first direction. At this time, the guide post slides within the first guide groove of the guide sleeve, and the inner core moves relative to the outer core along the first direction to push the plastic part, causing the snap-fit ​​hole of the plastic part to separate from the outer core, thus releasing the outer core from the snap-fit ​​hole along the moving direction of the inner core. Continuing to drive the inner core along the first direction, when the inner core drives the guide post to slide into the spirally extended second guide groove, the inner core rotates circumferentially. Since the inner core is circumferentially confined to the outer core, the inner core drives the outer core to rotate synchronously, achieving rotational release of the inner core from the snap-fit ​​hole along its circumferential direction. The inner and outer cores then smoothly demold from the snap-fit ​​hole. Because the inner core can rotate synchronously with the outer core, the relative position between the inner and outer cores in the circumferential direction can be prevented from changing, thus ensuring the molding quality of the snap-fit ​​holes in the plastic parts after multiple uses.

[0038] This utility model also provides a demolding device. Due to the aforementioned release structure, it ensures smooth demolding from the snap-fit ​​hole of the plastic part, while preventing changes in the relative position of the inner and outer cores in the circumferential direction, thus guaranteeing the molding quality of the plastic part. The inner core can be driven to move along the first direction via the push mechanism and the lifting seat. When the guide post is located in the second guide groove of the guide sleeve, the inner core drives the outer core to rotate synchronously. Since the first ejector pin on the lifting seat is inserted into the plastic part at this time, it prevents the plastic part from rotating with the inner core under its influence, thus preventing rotation and achieving smooth rotational release between the inner core and the plastic part. Attached Figure Description

[0039] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0040] Figure 1 This is a schematic diagram of the structure of the plastic part provided in a specific embodiment of this utility model;

[0041] Figure 2 This is a first structural schematic diagram of the tripping structure provided in a specific embodiment of this utility model;

[0042] Figure 3 This is a schematic diagram of the second structure of the tripping structure provided in a specific embodiment of this utility model;

[0043] Figure 4 This is an exploded view of the tripping structure provided in a specific embodiment of this utility model;

[0044] Figure 5 yes Figure 2 A partial view;

[0045] Figure 6 This is a schematic diagram of the push rod and mounting base of the release structure provided in a specific embodiment of this utility model;

[0046] Figure 7 This is a schematic diagram of the guide sleeve of the release structure provided in a specific embodiment of this utility model;

[0047] Figure 8 This is a schematic diagram of the release structure provided in a specific embodiment of the present invention when the guide post is located in the second guide groove;

[0048] Figure 9 This is a schematic diagram of the release structure provided in a specific embodiment of the present invention when the guide post is located in the third guide groove;

[0049] Figure 10 This is a first isometric view of the demolding device provided in a specific embodiment of this utility model;

[0050] Figure 11 This is a second isometric view of the demolding device provided in a specific embodiment of this utility model;

[0051] Figure 12 This is a first cross-sectional view of the demolding device provided in a specific embodiment of this utility model;

[0052] Figure 13 yes Figure 12 A partial view;

[0053] Figure 14 This is a second cross-sectional view of the demolding device provided in a specific embodiment of this utility model;

[0054] Figure 15 This is a third cross-sectional view of the demolding device provided in a specific embodiment of this utility model;

[0055] Figure 16 This is a third isometric view of the demolding device provided in a specific embodiment of this utility model;

[0056] Figure 17 This is a fourth cross-sectional view of the demolding device provided in a specific embodiment of this utility model.

[0057] In the picture:

[0058] 1. Tripping structure; 2. Lifting seat; 3. Pushing mechanism; 4. First ejector pin; 5. Second ejector pin; 6. Locking assembly; 7. Unlocking component;

[0059] 11. Inner core; 12. Outer core; 13. Guide sleeve; 14. Guide post; 15. Push rod; 16. Mounting base; 17. Fixing pin;

[0060] 111. Molding groove; 121. Fitting hole; 122. Exposed opening; 123. Molding protrusion;

[0061] 131. First guide groove; 132. Second guide groove; 133. Third guide groove; 134. Through hole; 135. First half shell; 136. Second half shell;

[0062] 1351, First half-hole; 1352, First half-groove; 1353, Second half-groove; 1354, Fifth half-groove;

[0063] 1361, Second half-hole; 1362, Third half-groove; 1363, Fourth half-groove; 1364, Sixth half-groove;

[0064] 151. Locking block; 1511. Second step structure; 1512. First boss; 1513. Second boss;

[0065] 161. First card slot; 162. Second card slot;

[0066] 1621. First step structure; 1622. Mounting port; 1623. First groove segment; 1624. Second groove segment;

[0067] 21. First needle plate; 22. Second needle plate;

[0068] 210. First groove; 211. Third plate; 212. Fourth plate;

[0069] 2101, First limiting groove; 2102, Second limiting groove;

[0070] 2111, Third perforation; 2121, Fourth perforation; 2122, Clip protrusion;

[0071] 220. Second groove; 221. First plate; 222. Second plate;

[0072] 2201, Third limiting groove; 2202, Fourth limiting groove;

[0073] 2211, First perforation; 2221, Slide groove; 2222, Second perforation;

[0074] 31. Top block; 32. Top rod;

[0075] 61. First locking block; 62. Second locking block; 63. Elastic element; 64. Connecting element; 65. Fastener;

[0076] 611. First buckle; 612. Third slot;

[0077] 6111, First guide surface;

[0078] 620. First pushing surface; 621. Second buckle; 622. Lock hole; 623. Waist-shaped hole;

[0079] 6211, Second guide surface;

[0080] 71. Second pushing surface; 72. Stop block;

[0081] 100. Plastic part; 101. Snap-fit ​​hole; 102. Insertion hole; 103. Tube structure;

[0082] 1011, Buckle part; 1012, Notch part. Detailed Implementation

[0083] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0084] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0085] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0086] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0087] In this embodiment, the term "and / or" is merely a description of the relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this invention, the character " / " generally indicates that the preceding and following associated objects have an "or" relationship.

[0088] In the embodiments of this utility model, the same reference numerals denote the same parts, and for the sake of brevity, detailed descriptions of the same parts are omitted in different embodiments.

[0089] Example 1

[0090] This embodiment provides a release structure for releasing the snap-fit ​​hole of a plastic part. Exemplarily, the structure of the plastic part 100 to be molded is as follows: Figure 1 As shown, the inner side of the plastic part 100 is provided with a cylindrical structure 103, which surrounds a snap-fit ​​hole 101. The inner wall of the snap-fit ​​hole 101 is provided with at least one snap-fit ​​portion 1011, such as... Figure 1 The diagram shows two latching portions 1011, and at least one notch 1012 is provided on the outer wall of the cylindrical structure 103. The notch 1012 communicates with the interior of the latching hole 101, as shown. Figure 1 The shown part has two notches 1012. The plastic part 100 can be a plastic housing for low-voltage electrical appliances such as circuit breakers.

[0091] like Figure 2 , Figure 3 as well as Figure 4 The diagram shown is a schematic of the tripping structure 1 provided in this embodiment. The tripping structure 1 includes an inner core 11, an outer core 12, a guide sleeve 13, and a guide post 14. Among these, combined with... Figure 5 The inner core 11 is provided with a molding groove 111 for molding the above-mentioned snap-fit ​​portion 1011, and the outer wall of the outer core 12 is provided with a molding protrusion 123 for molding the above-mentioned notch portion 1012.

[0092] The inner core 11 passes through the guide sleeve 13 and the outer core 12, and is slidably engaged with both the guide sleeve 13 and the outer core 12. The guide sleeve 13 is located on the side of the outer core 12 away from the snap-fit ​​hole 101. The inner core 11 is circumferentially confined to the outer core 12, and the inner core 11 and the outer core 12 can rotate synchronously relative to the guide sleeve 13. The guide sleeve 13 is provided with a first guide groove 131 and a second guide groove 132 that are interconnected. The first guide groove 131 extends along a first direction and is located at the end of the second guide groove 132 away from the outer core 12. The second guide groove 132 extends spirally. The guide post 14 is connected to the inner core 11 and is slidably engaged with the first guide groove 131 and the second guide groove 132. The outer core 12 is used to disengage from the snap-fit ​​hole 101 along the first direction, and the inner core 11 is used to disengage from the snap-fit ​​hole 101 along its own circumference; wherein, the first direction is the sliding direction of the inner core 11, and is also the axial direction of the inner core 11, the outer core 12, and the guide sleeve 13. When demolding, the first direction is the vertical direction.

[0093] Specifically, when disengaging, the molding groove 111 on the inner core 11 needs to rotate and disengage from the snap-fit ​​portion 1011 on the plastic part 100, and the molding protrusion 123 on the outer core 12 needs to disengage from the notch portion 1012 on the plastic part 100 along the first direction.

[0094] Because the inner core 11 rotates and disengages from the snap-fit ​​hole 101 of the plastic part 100 along its circumferential direction, and the outer core 12 disengages from the snap-fit ​​hole 101 along the moving direction of the inner core 11 relative to the guide sleeve 13, the inner core 11 cannot directly rotate to achieve disengagement during disengagement, thus avoiding damage to the snap-fit ​​hole 101 after molding. When disengaging through this disengagement structure 1, the inner core 11 is first moved along the first direction. At this time, the guide post 14 slides in the first guide groove 131 of the guide sleeve 13, and the inner core 11 moves relative to the outer core 12 along the first direction to push the plastic part 100, so that the snap-fit ​​hole 101 of the plastic part 100 is separated from the outer core 12, thereby achieving the disengagement of the outer core 12 from the snap-fit ​​hole 101 along the moving direction of the inner core 11. Continuing to drive the inner core 11 along the first direction, when the inner core 11 drives the guide post 14 to slide into the spirally extended second guide groove 132, the inner core 11 rotates circumferentially. Since the inner core 11 is circumferentially confined to the outer core 12, the inner core 11 drives the outer core 12 to rotate synchronously, realizing the rotational disengagement of the inner core 11 from the snap-fit ​​hole 101 along the circumferential direction. The inner core 11 and the outer core 12 are then successfully demolded from the snap-fit ​​hole 101. Because the inner core 11 can synchronously drive the outer core 12 to rotate together when rotating, the relative position between the inner core 11 and the outer core 12 in the circumferential direction can be prevented from changing, ensuring the molding quality of the snap-fit ​​hole 101 of the plastic part 100 after multiple uses.

[0095] In this embodiment, the outer core 12 is provided with a fitting hole 121 for the inner core 11 to pass through. The inner core 11 can move along a first direction within the fitting hole 121. The cross-sections of both the fitting hole 121 and the inner core 11 are non-circular, thus circumferentially limiting the inner core 11 to the outer core 12. Specifically, refer to... Figure 4 and Figure 5 The inner core 11 includes a central square pillar and two side fan-shaped pillars, which are combined to form an irregularly shaped inner core 11. The shape and size of the fitting hole 121 of the outer core 12 are adapted to the shape and size of the inner core 11 to ensure good circumferential positioning. An exposure opening 122 is provided at the end of the outer core 12, which communicates with the fitting hole 121. The outer wall of the fan-shaped pillars of the inner core 11 is exposed through the corresponding exposure opening 122, and the exposed outer wall of the fan-shaped pillars is provided with a forming groove 111.

[0096] See Figure 3 The guide sleeve 13 is provided with a through hole 134, and the inner core 11 is inserted into the through hole 134. It can move relative to the guide sleeve 13 in the first direction and rotate in its own circumference. Therefore, the cross-sectional area of ​​the through hole 134 is larger than the cross-sectional area of ​​the inner core 11 so that the inner core 11 can rotate smoothly.

[0097] See Figure 3 and Figure 4The tripping structure 1 also includes a push rod 15, which is connected to the inner core 11 and extends out of the guide sleeve 13 away from the outer core 12. The push rod 15 and the guide sleeve 13 are slidably engaged in a first direction, and the push rod 15 is rotatably engaged with the through hole 134 of the guide sleeve 13. The lower end of the inner core 11 is located inside the guide sleeve 13 to connect with the push rod 15, preventing the inner core 11 from being too long and easily broken. The push rod 15 can drive the inner core 11 to move in the first direction. Moreover, the shape and size of the push rod 15 can be set to match the shape and size of the through hole 134 to improve the stability of the inner core 11 during rotation.

[0098] like Figure 3 , Figure 4 as well as Figure 6 As shown, the release structure 1 also includes a mounting base 16, which is used to connect the inner core 11 and the push rod 15. The first end of the mounting base 16 is provided with a first slot 161, in which the inner core 11 is engaged along a first direction, so that the inner core 11 is circumferentially confined within the mounting base 16, and the two can rotate synchronously. The guide post 14 penetrates the mounting base 16 and the inner core 11 radially, preventing the inner core 11 from dislodging from the first slot 161 along the first direction.

[0099] The second end of the mounting base 16 is provided with a second slot 162, and the inner wall of the second slot 162 is provided with a first step structure 1621. The end face of the push rod 15 is provided with a locking block 151, and the locking block 151 is provided with a second step structure 1511. The second step structure 1511 abuts against the first step structure 1621 in a first direction. The second slot 162 has an installation port 1622 for the locking block 151 to be radially engaged into the second slot 162 along the guide post 14. The locking block 151 of the push rod 15 can enter the second slot 162 through the installation port 1622, and is limited by the first step structure 1621 and the second step structure 1511, preventing the push rod 15 from disengaging from the second slot 162 in the first direction. Installation and disassembly are convenient and the limiting is reliable. The shape and size of the mounting base 16 can be set to match the shape and size of the through hole 134 to improve the stability of the inner core 11 when rotating.

[0100] like Figure 6As shown, the locking block 151 includes a first boss 1512 protruding from the push rod 15 and a second boss 1513 connected to the first boss 1512. The diameter of the second boss 1513 is larger than the diameter of the first boss 1512, and the two are coaxially arranged to form a T-shaped structure. A second step structure 1511 is formed at the connection between the second boss 1513 and the first boss 1512. The second locking groove 162 includes a first groove segment 1623 and a second groove segment 1624 that are connected. The cross-sectional area of ​​the first groove segment 1623 is larger than the cross-sectional area of ​​the second groove segment 1624. A first step structure 1621 is formed between the inner walls of the two grooves. The step surface of the second step structure 1511 rests on the step surface of the first step structure 1621.

[0101] like Figure 7 As shown, the guide sleeve 13 includes a first half-shell 135 and a second half-shell 136. The first half-shell 135 is provided with a first half-hole 1351 and a first half-groove 1352 and a second half-groove 1353 communicating with the first half-hole 1351; the second half-shell 136 is provided with a second half-hole 1361 and a third half-groove 1362 and a fourth half-groove 1363 communicating with the second half-hole 1361. The first half-shell 135 and the second half-shell 136 are engaged with each other. The first half-hole 1351 and the second half-hole 1361 form a through hole 134 for the inner core 11 to pass through. The first half-groove 1352 and the third half-groove 1362 form a first guide groove 131. The second half-groove 1353 and the fourth half-groove 1363 form a second guide groove 132. By dividing the guide sleeve 13 into a first half-shell 135 and a second half-shell 136, the inner core 11, mounting base 16, push rod 15 and guide post 14 can be installed first, then assembled onto one of the first half-shell 135 and the second half-shell 136, and then the other half can be fastened on. This makes assembly convenient and simplifies the manufacturing process of the guide sleeve 13.

[0102] In this tripping structure 1, see Figure 3 The guide sleeve 13 is also provided with a third guide groove 133 that cooperates with the guide post 14. The third guide groove 133 is connected to the end of the second guide groove 132 away from the first guide groove 131. The guide post 14 can slide from the second guide groove 132 into the third guide groove 133. Specifically, the third guide groove 133 extends along the first direction. When the guide post 14 slides into the third guide groove 133, it will no longer drive the inner core 11 to rotate.

[0103] Furthermore, the first half-shell 135 is provided with a fifth half-groove 1354 communicating with the first half-hole 1351, and the second half-shell 136 is provided with a sixth half-groove 1364 communicating with the second half-hole 1361. After the first half-shell 135 and the second half-shell 136 are engaged, the fifth half-groove 1354 and the sixth half-groove 1364 surround and form the aforementioned third guide groove 133.

[0104] See Figure 3 , Figure 8 as well as Figure 9 The general working process of the tripping structure 1 provided in this embodiment is as follows:

[0105] The inner core 11 is driven upward by the push rod 15. At this time, the guide post 14 slides in the first guide groove 131, the inner core 11 pushes out the outer core 12, and pushes the plastic part 100 upward, so that the plastic part 100 separates from the outer core 12, completing the disengagement of the molding protrusion 123 on the outer core 12 from the notch 1012. The disengagement structure 1 is composed of... Figure 3 The state changes shown are Figure 8 The state shown.

[0106] Continue driving the push rod 15 upwards, causing the guide post 14 to move into the second guide groove 132. Because the second guide groove 132 extends spirally, rotation will occur during the upward movement of the inner core 11. The inner core 11, mounting base 16, push rod 15, guide post 14, and outer core 12 all rotate synchronously. The molding groove 111 on the inner core 11 rotates and disengages from the snap-fit ​​part 1011 on the plastic part 100. Finally, the guide post 14 enters the third guide groove 133. During this process, the disengagement structure 1... Figure 8 The state changes shown are Figure 9 The state shown. Since the inner core 11 and the outer core 12 rotate synchronously, it can be ensured that the relative position of the molding groove 111 on the inner core 11 and the molding protrusion 123 on the outer core 12 will not change after multiple uses, thus ensuring the molding quality of the snap hole 101.

[0107] Example 2

[0108] Based on the same inventive concept as Embodiment 1, such as Figure 10 and Figure 11 As shown, this embodiment also provides a demolding device, including a lifting seat 2, a pushing mechanism 3, at least one first ejector pin 4, and the release structure 1 in Embodiment 1.

[0109] In this design, the inner core 11 of the release structure 1, at the end furthest from the plastic part 100, is connected to the lifting seat 2; the pushing mechanism 3 is connected to the lifting seat 2 and is at least partially located on the side of the lifting seat 2 facing away from the plastic part 100; the first ejector pin 4 is connected to the lifting seat 2, and when the guide post 14 is located within the second guide groove 132, the first ejector pin 4 is used to insert into the plastic part 100. See also Figure 1 The plastic part 100 is provided with an insertion hole 102. The first ejector pin 4 is used to form the insertion hole 102. When demolding, the first ejector pin 4 disengages from the insertion hole 102.

[0110] The demolding device provided in this embodiment, by adopting the release structure 1 in Embodiment 1, can ensure smooth demolding from the snap-fit ​​hole 101 of the plastic part 100, and at the same time, can prevent changes in the relative position of the inner core 11 and the outer core 12 in the circumferential direction, thus ensuring the molding quality of the plastic part 100. The inner core 11 can be driven to move along the first direction by the push mechanism 3 and the lifting seat 2. When the guide post 14 is located in the second guide groove 132 of the guide sleeve 13, the inner core 11 drives the outer core 12 to rotate synchronously. Since the first ejector pin 4 provided on the lifting seat 2 is inserted into the plastic part 100 at this time, it can prevent the plastic part 100 from rotating with the inner core 11 under the drive of the inner core 11, thus playing a role in stopping rotation and realizing the smooth rotational release of the inner core 11 and the plastic part 100.

[0111] For example, four first ejector pins 4 are provided, which are respectively inserted into the insertion holes 102 at the four corners of the plastic part 100. This effectively prevents the inner core 11 from driving the plastic part 100 to rotate when it rotates, ensuring that the plastic part 100 remains stable and does not shake during the disengagement process between the inner core 11 and the plastic part 100, and avoiding damage to the snap-fit ​​hole 101.

[0112] like Figure 10 and Figure 11 As shown, the lifting seat 2 includes a first needle plate 21 and a second needle plate 22 located on the side of the first needle plate 21 facing the plastic part 100. The pushing mechanism 3 slides through the first needle plate 21 along a first direction and is connected to the second needle plate 22. The second needle plate 22 can be locked or unlocked from the first needle plate 21. When both are unlocked, the second needle plate 22 can move upward relative to the first needle plate 21 under the drive of the pushing mechanism 3, separating from the first needle plate 21. The inner core 11 and the first ejector pin 4 are both connected to the first needle plate 21. Specifically, the inner core 11 is connected to the first needle plate 21 through a push rod 15, and both the push rod 15 and the first ejector pin 4 are slidably engaged with the second needle plate 22 along the first direction. At least one second ejector pin 5 for supporting the plastic part 100 is connected to the second needle plate 22.

[0113] After the release mechanism 1 has released from the plastic part 100, the second pin plate 22 unlocks from the first pin plate 21. When the second pin plate 22 moves upward relative to the first pin plate 21 under the drive of the push mechanism 3, the push rod 15 and the first ejector pin 4 connected to the first pin plate 21 no longer move upward. The second ejector pin 5 connected to the second pin plate 22 moves upward with the second pin plate 22 and continues to push the plastic part 100, so that the first ejector pin 4 disengages from the insertion hole 102 of the plastic part 100. That is, the second ejector pin 5 plays the role of pushing the plastic part 100 a second time, realizing automated demolding.

[0114] Specifically, the first needle plate 21 and the second needle plate 22 are locked and unlocked by the locking assembly 6, see [link to documentation]. Figure 11 and Figure 12The locking assembly 6 includes a first locking block 61 connected to the first pin plate 21 and a second locking block 62 connected to the second pin plate 22. When the guide post 14 is located in the first guide groove 131 and the second guide groove 132, the second locking block 62 is locked to the first locking block 61. That is, during the process of the outer core 12 and the inner core 11 disengaging from the plastic part 100, the second pin plate 22 remains locked to the first pin plate 21. At this time, the lifting seat 2 is driven to move upward as a whole by the pushing mechanism 3. The push rod 15 of the disengagement structure 1 moves the inner core 11 upward under the drive of the lifting seat 2. During this disengagement process, the first ejector pin 4 remains inserted with the plastic part 100, which plays a role in preventing rotation. When the guide post 14 is located in the third guide groove 133, the second locking block 62 unlocks from the first locking block 61. That is, when the outer core 12 and the inner core 11 complete the disengagement from the plastic part 100, the locking assembly 6 unlocks, the second pin plate 22 can separate from the first pin plate 21, the push mechanism 3 continues to drive upward, causing the second pin plate 22 to move upward relative to the first pin plate 21, and the second pin plate 22 pushes the plastic part 100 twice through the second ejector pin 5, realizing the demolding of the plastic part 100 from the first ejector pin 4.

[0115] like Figure 11 , Figure 12 as well as Figure 13 As shown, the first locking block 61 is provided with a first latch 611, and the second locking block 62 slides in cooperation with the second pin plate 22 along the second direction. The second locking block 62 is provided with a second latch 621 and a first abutting surface 620 spaced apart. The second latch 621 engages with the first latch 611 to lock or disengage to unlock. The second direction is set at an angle to the first direction. The demolding device also includes an unlocking component 7, which is provided with a second abutting surface 71 that slides in cooperation with the first abutting surface 620. The unlocking component 7 pushes the second locking block 62 through the cooperation of the second abutting surface 71 and the first abutting surface 620, thereby separating the second latch 621 from the first latch 611.

[0116] Specifically, Figure 11 The second and third directions shown are both horizontal, and the first, second, and third directions are perpendicular to each other. The second direction is the direction of movement of the second latch 621.

[0117] The unlocking component 7 is installed on the fixed structure of the mold. During the upward movement of the lifting seat 2, the second pin plate 22 gradually approaches the unlocking component 7. During the sliding engagement between the second pushing surface 71 of the unlocking component 7 and the first pushing surface 620 of the second locking block 62, the unlocking component 7 pushes the second locking block 62 from the locked position to the unlocked position. Figure 14 As shown. Then the second needle plate 22 can move upwards relative to the first needle plate 21, as... Figure 15 As shown, at this time only the second ejector pin 5 supports the plastic part 100.

[0118] See Figure 13The locking assembly 6 also includes an elastic element 63, which is connected between the second locking block 62 and the second pin plate 22. When the second locking block 62 moves to the process of unlocking the second latch 621 and the first latch 611, the elastic element 63 is compressed and deformed by the end of the second locking block 62 away from the second latch 621. When the unlocking member 7 separates from the first pushing surface 620, the second locking block 62 can engage with the first locking block 61 under the elastic force of the elastic element 63, thus relocking the second locking block 62 and the first locking block 61.

[0119] For example, the elastic element 63 is a spring, and multiple elastic elements 63 can be provided between the second locking block 62 and the second needle plate 22, with the multiple elastic elements 63 spaced apart along a third direction.

[0120] like Figure 11 and Figure 13 As shown, the second locking block 62 is provided with a locking hole 622, and the inner wall of the locking hole 622 is provided with the aforementioned first pushing surface 620. The unlocking member 7 can be inserted into the locking hole 622, so as to slide and engage with the first pushing surface 620 through the second pushing surface 71. When unlocking, the unlocking member 7 gradually disengages from the locking hole 622. The locking hole 622 not only guides the unlocking member 7, but also facilitates the arrangement of the first pushing surface 620.

[0121] See Figure 11 , Figure 12 and Figure 13 The second needle plate 22 includes a first plate 221 and a second plate 222 stacked together, with the second plate 222 located between the first plate 221 and the first needle plate 21. The first plate 221 has a first through hole 2211 for inserting the unlocking member 7. The side of the second plate 222 facing the first plate 221 has a recessed groove 2221. A second locking block 62 is disposed within the groove 2221 and slides within it. The second locking block 62 has an oblong hole 623 extending in a second direction. A connecting member 64 is disposed on the second plate 222, passing through the oblong hole 623 and sliding within it. The first plate 221 covers the opening of the groove 2221, allowing the second locking block 62 to slide between the inner wall of the groove 2221 and the first plate 221, facilitating the installation of the second locking block 62 on the second needle plate 22. After the second locking block 62 is placed in the slide groove 2221, the connector 64 can be passed through the oblong hole 623 and connected to the second plate 222. The sliding fit between the oblong hole 623 and the connector 64 will not obstruct the movement of the second locking block 62.

[0122] Specifically, the connector 64 is a screw that is threadedly connected to the second plate 222, and the first plate 221 has a receiving groove on the side facing the second plate 222 for accommodating the head of the screw.

[0123] See Figure 13The first buckle 611 is provided with a first guide surface 6111, and the second buckle 621 is provided with a second guide surface 6211. Both the first guide surface 6111 and the second guide surface 6211 are inclined surfaces and are set at an angle to both the first direction and the second direction. When the second pin plate 22 moves the second locking block 62 downward, the first guide surface 6111 and the second guide surface 6211 slide in engagement. During this period, the second locking block 62 presses the elastic member 63 so that the second locking block 62 slides smoothly under the first buckle 611. When the unlocking member 7 disengages from the lock hole 622, the second locking block 62, under the elastic force of the elastic member 63, re-engages with the first buckle 611 through the second buckle 621 and locks itself.

[0124] like Figure 16 As shown, the unlocking component 7 is also provided with a stop block 72, which is used to stop the first plate 221 along the first direction and can limit the movement of the second needle plate 22.

[0125] like Figure 13 As shown, the second plate 222 is provided with a second through hole 2222 for avoiding the unlocking member 7. The first needle plate 21 includes a third plate 211 and a fourth plate 212 stacked together. The third plate 211 is located between the second plate 222 and the fourth plate 212. Both the third plate 211 and the fourth plate 212 are slidably engaged with the pushing mechanism 3. The third plate 211 is provided with a third through hole 2111 for avoiding the unlocking member 7, and the fourth plate 212 is provided with a fourth through hole 2121 for avoiding the unlocking member 7.

[0126] See Figure 16 The first pin plate 21 is provided with a first groove 210, and the second pin plate 22 is provided with a second groove 220. The first end of the first locking block 61 is engaged in the first groove 210, and the second end of the first locking block 61 extends upward relative to the first pin plate 21 and is engaged in the second groove 220, and is provided with the aforementioned first buckle 611. The first groove 210 and the second groove 220 provide space for the installation of the first locking block 61, making the layout of the lifting seat 2 and the locking assembly 6 more reasonable and compact. Moreover, the first groove 210 and the second groove 220 can limit the first locking block 61, improving the installation stability of the first locking block 61.

[0127] Specifically, the first groove 210 includes a first limiting groove 2101 disposed on the third plate 211 and a second limiting groove 2102 disposed on the fourth plate 212, in combination with Figure 13 The inner wall of the second limiting groove 2102 is provided with a locking protrusion 2122, and the first end of the first locking block 61 is provided with a third locking groove 612. The third locking groove 612 engages with the locking protrusion 2122, and the first locking block 61 is connected to the fourth plate 212 by a fastener 65. The fastener 65 is exemplarily a screw.

[0128] See Figure 16 The second groove 220 includes a third limiting groove 2201 provided on the first plate 221 and a fourth limiting groove 2202 provided on the second plate 222. When the second needle plate 22 moves upward relative to the first locking block 61, the setting of the third limiting groove 2201 and the fourth limiting groove 2202 ensures that the first locking block 61 will not block the second needle plate 22.

[0129] In this embodiment, two sets of locking components 6 are provided between the first needle plate 21 and the second needle plate 22. The two sets of locking components 6 are respectively located at both ends of the lifting seat 2 along the second direction. Of course, in other embodiments, the number of locking components 6 can be increased or decreased, and this is not limited here.

[0130] like Figure 12 As shown, the pushing mechanism 3 includes a top block 31 and a top rod 32 connected to the top block 31. The top block 31 is connected to the second needle plate 22 and slides with the first needle plate 21.

[0131] like Figure 3 and Figure 17 As shown, the bottom end of the push rod 15 of the release structure 1 is provided with a fixing pin 17. The third plate 211 has a recessed mounting groove on the side facing the fourth plate 212. The push rod 15 passes through the third plate 211, and the fixing pin 17 is located in the mounting groove, so as to realize the fixed connection between the push rod 15 and the first needle plate 21.

[0132] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A trip structure characterized by, The release structure is used to release the snap hole (101) of the plastic part (100). The release structure includes an inner core (11), an outer core (12), a guide sleeve (13), and a guide post (14). The inner core (11) passes through the guide sleeve (13) and the outer core (12) and slides in cooperation with the guide sleeve (13) and the outer core (12). The guide sleeve (13) is located on the side of the outer core (12) away from the snap hole (101). The inner core (11) is circumferentially limited to the outer core (12). The inner core (11) and the outer core (12) can rotate synchronously relative to the guide sleeve (13). The guide sleeve (13) is provided with a first guide groove (131) and a second guide groove (132) that are interconnected. The first guide groove (131) extends along a first direction and is located at the end of the second guide groove (132) away from the outer core (12). The second guide groove (132) extends in a spiral shape. The guide post (14) is connected to the inner core (11) and slides in cooperation with the first guide groove (131) and the second guide groove (132); The outer core (12) is used to disengage from the snap-fit ​​hole (101) along the first direction, and the inner core (11) is used to disengage from the snap-fit ​​hole (101) along its own circumference; wherein, the first direction is the sliding direction of the inner core (11).

2. The trip structure of claim 1, wherein, The tripping structure also includes a push rod (15), which is connected to the inner core (11) and extends out of the guide sleeve (13) away from the outer core (12); The push rod (15) and the guide sleeve (13) are slidably engaged in the first direction, and the push rod (15) and the guide sleeve (13) are rotatably engaged in the first direction.

3. The trip structure of claim 2, wherein, The tripping structure also includes a mounting base (16); The first end of the mounting base (16) is provided with a first slot (161), the inner core (11) is engaged in the first slot (161) along the first direction, and the guide post (14) penetrates the mounting base (16) and the inner core (11) along the radial direction of the inner core (11). The second end of the mounting base (16) is provided with a second slot (162), and the inner wall of the second slot (162) is provided with a first step structure (1621); the end face of the push rod (15) is provided with a locking block (151), the locking block (151) is provided with a second step structure (1511), the second step structure (1511) abuts against the first step structure (1621) in the first direction, and the second slot (162) has an installation port (1622) for the locking block (151) to be radially inserted into the second slot (162) along the guide post (14).

4. The trip structure of claim 1, wherein, The guide sleeve (13) includes a first half-shell (135) and a second half-shell (136); The first half-shell (135) is provided with a first half-hole (1351) and a first half-groove (1352) and a second half-groove (1353) communicating with the first half-hole (1351); the second half-shell (136) is provided with a second half-hole (1361) and a third half-groove (1362) and a fourth half-groove (1363) communicating with the second half-hole (1361); The first half-shell (135) is engaged with the second half-shell (136). The first half-hole (1351) and the second half-hole (1361) form a through hole (134) for the inner core (11) to pass through. The first half-groove (1352) and the third half-groove (1362) form the first guide groove (131). The second half-groove (1353) and the fourth half-groove (1363) form the second guide groove (132).

5. The trip structure of any one of claims 1-4, wherein, The outer core (12) is provided with a fitting hole (121) for the inner core (11) to pass through. The cross-section of the fitting hole (121) and the cross-section of the inner core (11) are both non-circular.

6. A demolding device, characterized in that It includes a lifting seat (2), a pushing mechanism (3), at least one first ejector pin (4), and a release structure as described in any one of claims 1-5; The end of the inner core (11) of the release structure away from the plastic part (100) is connected to the lifting seat (2); The pushing mechanism (3) is connected to the lifting seat (2) and is at least partially located on the side of the lifting seat (2) facing away from the plastic part (100); The first ejector pin (4) is connected to the lifting seat (2). When the guide post (14) is located in the second guide groove (132), the first ejector pin (4) is used to insert into the plastic part (100).

7. The demolding device according to claim 6, characterized in that The lifting seat (2) includes a first needle plate (21) and a second needle plate (22) located on the side of the first needle plate (21) facing the plastic part (100); The push mechanism (3) is slidably inserted through the first needle plate (21) and connected to the second needle plate (22); the inner core (11) and the first ejector pin (4) are both connected to the first needle plate (21), and at least one second ejector pin (5) for supporting the plastic part (100) is connected to the second needle plate (22); The first needle plate (21) is connected to a first locking block (61), and the second needle plate (22) is connected to a second locking block (62); the guide sleeve (13) is provided with a third guide groove (133) that cooperates with the guide post (14), and the third guide groove (133) is connected to the end of the second guide groove (132) away from the first guide groove (131); When the guide post (14) is located in the first guide groove (131) and the second guide groove (132), the second locking block (62) locks with the first locking block (61); when the guide post (14) is located in the third guide groove (133), the second locking block (62) unlocks with the first locking block (61).

8. The demolding device according to claim 7, characterized in that The first locking block (61) is provided with a first buckle (611), and the second locking block (62) slides in cooperation with the second pin plate (22) along the second direction. The second locking block (62) is provided with a second buckle (621) and a first pushing surface (620) at intervals. The second buckle (621) engages with the first buckle (611) to lock or disengage to unlock. The demolding device further includes an unlocking component (7), which is provided with a second pushing surface (71) that slides with the first pushing surface (620). The unlocking component (7) pushes the second locking block (62) through the cooperation of the second pushing surface (71) and the first pushing surface (620), thereby separating the second buckle (621) from the first buckle (611).

9. The demolding device according to claim 8, characterized in that An elastic element (63) is connected between the second locking block (62) and the second needle plate (22), and the second locking block (62) can engage with the first locking block (61) under the elastic force of the elastic element (63); And / or, the second lock block (62) is provided with a lock hole (622), the inner wall of the lock hole (622) is provided with the first abutting surface (620), and the unlocking member (7) is inserted into or disengaged from the lock hole (622); And / or, the first needle plate (21) is provided with a first groove (210), the second needle plate (22) is provided with a second groove (220), the first end of the first locking block (61) is engaged in the first groove (210), the second end of the first locking block (61) is engaged in the second groove (220), and is provided with the first buckle (611).

10. The demolding device according to claim 8 or 9, characterized in that The second needle plate (22) includes a first plate body (221) and a second plate body (222), with the second plate body (222) located between the first plate body (221) and the first needle plate (21); The first plate (221) is provided with a first through hole (2211) for the unlocking member (7) to pass through; the second plate (222) is provided with a groove (2221) on the side facing the first plate (221), the second locking block (62) slides with the groove (2221) and is provided with a waist-shaped hole (623) extending along the second direction, and a connector (64) is provided on the second plate (222), the connector (64) slides with the waist-shaped hole (623).

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