Sequential control type demolding device
By designing a sequentially controlled demolding device in the injection mold and utilizing multiple core-pulling and sequential control mechanisms, the problem of inconsistent demolding sequence in drawer molding was solved, achieving precise and orderly demolding and mold closing of the drawer, and improving molding efficiency.
Patent Information
- Application Number
- CN202423190952.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-24
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-12-24
AI Technical Summary
In the existing technology, when molding drawers with blind hole grooves, side structures and undercut structures, it is impossible to accurately control the demolding and mold closing sequence of each side core pull, which leads to dryness during the demolding process and affects the smooth molding of the product.
Design a sequential control demolding device. By setting multiple core pulls on the moving mold and the fixed mold, and using a first sequential control mechanism, a second sequential control mechanism and a third sequential control mechanism, ensure that the demolding directions of the main core pull, the first side core pull and the second side core pull are at an angle to each other. Through the cooperation of the sequential control mechanisms, the orderly demolding and mold closing of each core pull can be achieved.
It achieves precise and orderly demolding and mold closing of the drawers, avoids dryness during the demolding process, and ensures efficient product molding.
Smart Images
Figure CN223644194U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of injection mold technology, specifically to a sequential control demolding device. Background Technology
[0002] For the attached Figure 1 The car drawer structure shown includes a drawer body and a blind hole groove 101 provided at the end of the drawer body 1. An inverted buckle 103 is provided on the side of the end panel 102 of the drawer body 1 away from the blind hole groove 101 and directed toward the blind hole groove. At the same time, a square groove along the width direction of the drawer body is provided on the side wall of the drawer.
[0003] Currently, when injection molding drawers of this type, in order to conveniently mold blind hole grooves and square groove structures, it is necessary to set a main core pull and a first side core pull along the length of the drawer body. The main core pull is used to cooperate with the moving mold and the fixed mold to mold blind hole grooves, and the first side core pull is used to cooperate with the moving mold and the fixed mold to mold the side structure of the drawer body and the square groove structure. However, the drawer body also has an undercut structure, and the direction of the undercut structure is opposite to the direction of the blind hole groove mold opening. When the second side core is set to cooperate with the moving mold and the main core to form the undercut structure, the demolding direction of the second side core is opposite to the demolding direction of the main core, and the demolding of the second side core will be dry with the demolding of the first side core. If a separate second side core structure is set to demold the undercut, even if the main core and the first side core can be successfully demolded in the existing technology, the demolding direction of the set second side core structure is different from the demolding direction of the main core and the first side core. When the demolding structure of the second side core is set, it will be dry with the demolding of the first side core or the demolding of the second side core, making it difficult to conveniently arrange the demolding structure of the second side core, which affects the smooth molding of the product.
[0004] To address the aforementioned issues, the inventors slidably connected the second side core to the first side core, and provided a space on the first side core for the second side core to slide and demold. This allows the second side core to demold smoothly even when its demolding direction differs from that of the first side core. While this solution enables successful drawer molding, precise control of the demolding and closing sequence of the main core, the first side core, and the second side core is necessary during the actual demolding process to ensure continuous and accurate drawer injection molding. Utility Model Content
[0005] The present invention aims to provide a sequential control demolding device to solve the problem in the prior art that it is impossible to accurately control the demolding and mold closing sequence of each side core pull when molding drawers with blind hole groove structure, side structure and undercut structure.
[0006] To solve the above problems, the present invention adopts the following technical solution: a sequentially controlled demolding device, comprising a moving mold and a fixed mold that cooperate with each other, a main core puller and a first side core puller slidably connected on the moving mold, a second side core puller for cooperating with the main core puller slidably connected on the first side core puller, the demolding direction of the main core puller, the demolding direction of the first side core puller and the demolding direction of the second side core puller forming an angle with each other; a first sequential control mechanism for controlling the first side core puller to demold before the main core puller is connected on the moving mold, and a second sequential control mechanism is connected between the first side core puller and the main core puller, the second sequential control mechanism for controlling the second side core puller to demold synchronously when the first side core puller begins to demold; a third sequential control mechanism is provided on the second side core puller for controlling the second side core puller to slide synchronously with the first side core puller after demolding.
[0007] The principle and beneficial effects of this solution are as follows: the moving mold and the fixed mold are used to cooperate in forming the cavity of the drawer body; the main core pull cooperates with the moving mold and the fixed mold to form the cavity of the drawer blind hole groove; the first side core pull cooperates with the moving mold and the fixed mold to form the drawer side including the square groove structure; and the second side core pull cooperates with the moving mold and the main core pull to form the cavity for forming the undercut. In this application, the demolding directions of the main core, the first side core, and the second side core are all different from each other and form an angle between each other, so as to form the aforementioned blind hole groove, side square groove structure, and undercut structure. Taking the drawer formed in this application as an example, the demolding direction of the main core is perpendicular to the demolding direction of the first side core, and the demolding direction of the main core is opposite to the demolding direction of the second side core. Of course, the demolding direction of the second side core can also be set to form an angle (e.g., 60°) with the demolding direction of the main core. The specific angle size is determined by the setting direction of the undercut. Only one setting is given for the drawer structure. The specific demolding direction setting is determined according to the actual product structure.
[0008] In this application, a first sequence control mechanism is provided on the moving mold. Utilizing the sequential control function of the first sequence control mechanism, the demolding action of the first side core pull precedes that of the main core pull at the start of demolding. Only after the first side core pull completes its demolding action does the main core pull begin demolding. Furthermore, this application provides a second sequence control mechanism between the main core pull and the first side core pull. When the first side core pull demolds before the main core pull under the driving action of the first sequence control mechanism, the first side core pull also slides relative to the main core pull during its sliding motion along the moving mold. At this time, the second side core pull, under the sequential control function of the second sequence control mechanism... The demolding process begins synchronously with the first side core pull. Simultaneously, due to the small size of the undercut, the second side core pull can quickly complete its demolding action. After the second side core pull completes its demolding, under the control of the third sequence control mechanism, it continues to slide along with the first side core pull, which is in a demolding sliding state. This prevents the second side core pull from becoming immobile after demolding and thus obstructing the ejection of the drawer from the moving mold. Finally, after both the first and second side core pulls have completed demolding, the first sequence control mechanism drives the main core pull to demold. The entire demolding process is precise and orderly.
[0009] In addition, under the control of the first and second sequence control mechanisms, the second side core puller, the first side core puller, and the main core puller can not only complete the demolding action accurately and orderly, but also, under the control of the third sequence control mechanism, the relative positions of the second side core puller and the first side core puller during the demolding process are effectively guaranteed. Under the comprehensive control, the main core puller, the first side core puller, and the second side core puller can be closed accurately and orderly, thereby ensuring accurate and efficient molding during the drawer cycle molding process.
[0010] Preferably, as an improvement, the second sequence control mechanism includes a drive unit and a holding unit. When the first side core pull starts demolding before the main side core pull, the holding unit is used to control the second side core pull to maintain a fixed position in the demolding direction of the first side core pull, and the drive unit is used to drive the second side core pull to slide relative to the first side core pull and move away from the main core pull to demold.
[0011] In this scheme, the second sequence control mechanism includes a drive unit and a holding unit. During the process where the first sequence control mechanism controls the demolding of the first side core pull while the main core pull is not demolded, under the blocking and limiting action of the holding unit, the second side core pull maintains a fixed position in the demolding direction of the first side core pull. That is, the second side core pull will not follow the first side core pull in the demolding direction of the first side core pull, thereby avoiding the second side core pull from moving with the first side core pull without exiting the undercut structure and damaging the undercut structure. In addition, during the demolding process of the first side core pull, the drive unit drives the second side core pull to move away from the main core pull to complete the demolding of the second side core pull.
[0012] Therefore, during the demolding process of the first side core pull, the demolding trajectory of the second side core pull can only slide in the direction of the undercut setting under the combined action of the holding unit and the driving unit, thereby achieving smooth demolding of the undercut. For example, in the drawer structure of this application, the undercut direction is opposite to the direction of the blind hole groove. Therefore, during the demolding process of the second side core pull, the sliding demolding direction of the second side core pull is opposite to the sliding demolding direction of the main core pull. Of course, if the undercut setting direction and the blind hole groove setting direction in this application are at an angle to each other, the linkage mechanism can also be used to drive the demolding of the second side core pull, which will not be elaborated here.
[0013] Preferably, as an improvement, an elastic clamping member is connected between the moving mold and the first side core puller, so that the first side core puller is in the mold open state when it is not subjected to external force.
[0014] In this solution, by setting up an elastic clamping component, after the first side core pull completes demolding, the elastic force of the elastic clamping component keeps the first side core pull in the demolding position, so that the first sequence control mechanism can accurately control the first side core pull to close the mold precisely, ensuring that the first side core pull can accurately complete the demolding and mold closing actions.
[0015] Preferably, as an improvement, the elastic clamping member includes a clamping spring, with a clamping hole on the first side core puller, one end of the clamping spring located in the clamping hole, and the other end abutting against the moving mold.
[0016] In this design, a retaining spring is used to provide elastic support to the first side core puller. After the first side core puller slides relative to the moving mold to complete demolding, the first side core puller remains in a resisting state with the moving mold under the elastic force of the retaining spring. This prevents the first side core puller from sliding freely relative to the moving mold after mold opening, which would cause the first sequence control mechanism to be unable to accurately control the first side core puller to close the mold precisely. The elastic force of the retaining spring is stable and easy to install, and it can provide a good resisting effect for the first side core puller.
[0017] Preferably, as an improvement, the retaining unit includes an elastic retaining member and a first abutting surface and a second abutting surface that cooperate with each other. The first abutting surface is disposed on the main core puller, and the second abutting surface is disposed on the second side core puller. The elastic retaining member is connected between the second side core puller and the first side core puller. When the second side core puller is in the mold closed state, the first abutting surface and the second abutting surface abut against each other under the elastic force of the elastic retaining member. The driving unit includes a sloping groove and an inclined protrusion disposed between the first side core puller and the second side core puller. The inclined protrusion and the sloping groove are engaged by an inclined surface.
[0018] In this solution, during the demolding process of the second side core pull, the first and second abutting surfaces are always in a close-fitting state due to the elastic force of the elastic retainer. Even when the second side core pull moves away from the main core pull under the driving action of the driving unit, the elastic force of the elastic retainer on the second side core pull is always present. When the second side core pull moves away from the main core pull and demolds, the first and second abutting surfaces slide relative to each other but are still in a close-fitting state. Only after the second side core pull is demolded will the first and second abutting surfaces separate from each other, ensuring the accuracy of the demolding of the second side core pull. In addition, due to the elastic force of the elastic retainer, the first and second abutting surfaces are always in abutting state. The position of the second side core pull remains unchanged along the demolding direction of the first side core pull, while the first side core pull is always in the process of sliding demolding. Therefore, relative sliding will occur between the second side core pull and the first side core pull. In this solution, the inclined protrusion is inserted into the inclined groove. When the second side core pull and the first side core pull slide relative to each other, the inclined surface of the inclined groove and the inclined protrusion are used to drive the second side core pull to move away from the main core pull along the direction of the undercut, so that the undercut can be demolded smoothly. The fit between the inclined protrusion and the inclined groove is accurate and the driving effect is stable.
[0019] Preferably, as an improvement, the elastic retaining member includes a support spring, and a placement hole is opened on the second side core. The axial direction of the placement hole is parallel to the direction in which the inclined protrusion slides relative to the inclined groove. One end of the support spring is located in the placement hole, and the other end abuts against the first side core.
[0020] In this design, a placement hole is made on the second side core puller, and one end of the support spring is connected to the placement hole. The placement hole can fix the support spring, allowing it to provide better elastic support. In addition, the axis of the placement hole is parallel to the sliding direction of the inclined protrusion relative to the inclined groove. Therefore, when the second side core puller moves relative to the first side core puller under the drive unit for demolding, the sliding direction of the second side core puller relative to the first side core puller is the same as the axis of the placement hole. This ensures that the support spring is only subjected to axial pressing during the demolding process of the second side core puller, and will not slide relative to the first side core puller when the second side core puller moves relative to the first side core puller, thus protecting the support spring, improving its stability, and extending its service life.
[0021] Preferably, as an improvement, a pressure plate communicating with the placement hole is fixedly connected to the first side core puller, and the end of the support spring away from the second side core puller abuts against the pressure plate.
[0022] In this solution, by setting a pressure plate, when the support spring is damaged or fatigued and needs to be replaced, the support spring can be easily removed simply by opening the pressure plate, without having to replace the support spring by disassembling the second side core, making the operation more convenient.
[0023] Preferably, as an improvement, the main core puller is provided with a guide protrusion arranged along the demolding direction of the second side core puller, and the second side core puller is provided with a straight guide hole that cooperates with the guide protrusion. When the second side core puller cooperates with the main core puller to close the mold, the cooperation length between the guide protrusion and the straight guide hole is greater than the dimension of the movement of the second side core puller along the demolding direction when it is demolded.
[0024] In this solution, the sliding fit between the guide protrusion and the straight guide hole is used to limit and guide the demolding process of the second side core pulling away from the main core pulling. This ensures that the second side core pulling can only move along the direction of the undercut during demolding and cannot slide with the first side core pulling. This improves the accuracy of the demolding process of the second side core pulling and avoids damage to the undercut during the demolding process of the second side core pulling, so that the undercut can be formed more stably and accurately.
[0025] Preferably, as an improvement, the first sequence control mechanism includes a hydraulic cylinder and a slidably fitted inclined ejector rod and an inclined guide hole. The hydraulic cylinder is connected between the moving mold and the main core puller, the inclined ejector rod is fixedly connected to the fixed mold, and the inclined guide hole is opened on the first side core puller.
[0026] In this design, a slidingly engaged slanted ejector rod and slanted guide hole are used as the driving components for the first side core pulling. When the moving mold and the fixed mold move away from each other and the mold opens, the first side core pulling is automatically driven to slide relative to the moving mold under the combined action of the slanted ejector rod and the slanted guide hole, enabling the first side core pulling to complete demolding quickly and accurately. After the first side core pulling completes demolding, the hydraulic cylinder pushes the main side core pulling to demold, accurately controlling the demolding sequence of the main core pulling, the first side core pulling, and the second side core pulling. In addition, during mold closing, because an elastic clamping element is provided between the moving mold and the first side core pulling, the position of the first side core pulling relative to the moving mold is stable after demolding. When the moving mold and the fixed mold move closer to each other from the open state and the mold closes, the slanted ejector rod can be accurately inserted into the slanted guide hole, ensuring that the first side core pulling can accurately reset and close the mold.
[0027] Preferably, as an improvement, the third sequence control mechanism includes a positioning groove and a positioning protrusion that cooperate with each other. The positioning protrusion is fixedly connected to the first side core puller, and the positioning groove is set on the second side core puller. One end of the positioning protrusion is inserted into the positioning groove. When the second side core puller closes the mold, the positioning protrusion contacts one end of the positioning groove. When the second side core puller completes demolding, the positioning protrusion contacts the other end of the positioning groove.
[0028] In this solution, by utilizing the cooperation of the positioning groove and the positioning protrusion, when the first and second side core pulls are in the mold-closed state, the positioning protrusion contacts one end of the positioning groove. Therefore, when the first and second side core pulls begin to demold, the positioning protrusion and one end of the positioning groove are also in contact. When the first and second side core pulls are in the demolding process, the positioning protrusion slides along the positioning groove. When the first and second side core pulls have just completed demolding, the positioning protrusion slides to the other end of the positioning groove. If the first side core pull continues to slide relative to the moving mold, the positioning protrusion will push the second side core pull to slide synchronously with the first side core pull away from the drawer product, making it convenient to use the ejector plate in the existing technology to push the entire drawer out of the moving mold. Attached Figure Description
[0029] Figure 1 This is a schematic diagram of the formed drawer in this embodiment.
[0030] Figure 2 for Figure 1 A schematic diagram showing the view from the end of the middle drawer.
[0031] Figure 3 This is a schematic diagram of the mold-closed state in Embodiment 1 of the present invention.
[0032] Figure 4 This is a schematic diagram of the upward view in the mold-closed state in Embodiment 1 of the present invention.
[0033] Figure 5 This is a schematic diagram of the connection between the main core puller and the first side core puller in Embodiment 1 of the present invention.
[0034] Figure 6 This is a schematic diagram of the second side core pulling in Embodiment 1 of the present invention.
[0035] Figure 7 This is a schematic diagram of the second side core-pulling angle in Embodiment 1 of the present invention.
[0036] Figure 8 For along Figure 5 A schematic diagram of the AA section view.
[0037] Figure 9 For along Figure 5 A schematic diagram of the BB section.
[0038] Figure 10 This is an exploded view of the connection between the main core puller, the second side core puller, the support spring, and the positioning stud in Embodiment 1 of the present invention.
[0039] Figure 11 This is a partial schematic diagram of the first side core puller cooperating with the clamping spring and positioning screw in Embodiment 1 of the present invention.
[0040] Figure 12 In Embodiment 2 of the present invention, along the same path as... Figure 5 A schematic diagram of the BB section.
[0041] Figure 13 This is a schematic diagram of the second side core-pulling angle in Embodiment 2 of the present invention. Detailed Implementation
[0042] The following detailed description illustrates the specific implementation method:
[0043] The reference numerals in the accompanying drawings include: drawer body 1, blind hole groove 101, end panel 102, buckle 103, main drawer core 2, first abutting surface 201, guide protrusion 202, first side drawer core 3, oblique guide hole 301, oblique groove 302, abutting hole 303, second side drawer core 4, second abutting surface 401, inclined protrusion 402, placement hole 403, positioning groove 404, straight guide hole 405, hydraulic cylinder 5, oblique push rod 6, slider body 7, drive block 8, support spring 9, pressure plate 10, positioning stud 11, and abutting spring 12.
[0044] One type of drawer structure used in automobiles in the prior art is as follows: Figure 1 and Figure 2 As shown, the drawer includes a drawer body 1 and a blind hole groove 101 located at the end of the drawer body 1. Two undercuts 103 are provided on the side of the end panel 102 of the drawer body 1 facing away from the blind hole groove 101, located at opposite ends of the end panel 102. The direction of the undercuts 103 is opposite to the opening direction of the blind hole groove 101. When molding the drawer structure, a side core along the length of the drawer is required to form the blind hole groove 101. Then, a side core structure is provided to form the drawer side structure. Additionally, a side core structure is required to form the undercuts 103, and the demolding direction of this side core structure is opposite to the demolding direction of the side core corresponding to the blind hole groove 101.
[0045] Example 1
[0046] This embodiment is as shown in the attached figure. Figure 3 As shown: A multi-directional inclined ejector structure includes a moving mold and a fixed mold that cooperate with each other, the moving mold and the fixed mold being used to form the cavity of the drawer structure. Figure 3(The moving mold and fixed mold structure are not shown in the diagram). A main core 2 and a first side core 3 are slidably connected to the moving mold. A second side core 4 that cooperates with the main core 2 is slidably connected to the first side core 3. The moving mold and the fixed mold are used to cooperate in forming the cavity of the drawer body 1. The main core 2 cooperates with the moving mold and the fixed mold to form the cavity of the drawer blind hole groove 101. The first side core 3 cooperates with the moving mold and the fixed mold to form the drawer side surface including the square groove structure. The second side core 4 cooperates with the moving mold and the main core 2 to form the cavity for forming the undercut 103. The demolding direction of the main core 2, the demolding direction of the first side core 3 and the demolding direction of the second side core 4 form an angle with each other. According to the direction of the blind hole groove 101, the side surface structure and the undercut 103 in the aforementioned drawer structure, in this embodiment, the demolding direction of the main core 2 is opposite to the demolding direction of the second side core 4, and the demolding direction of the first side core 3 is perpendicular to both the demolding direction of the main core 2 and the demolding direction of the second side core 4.
[0047] In this embodiment, a first sequence control mechanism is connected to the moving mold to control the first side core pull 3 to demold before the main core pull 2, and a second sequence control mechanism is connected between the first side core pull 3 and the main core pull 2. The second sequence control mechanism is used to control the second side core pull 4 to demold synchronously when the first side core pull 3 starts demolding, and after the second side core pull 4 completes demolding, the first side core pull 3 continues to slide relative to the moving mold to demold. A third sequence control mechanism is provided on the second side core pull 4 to control the second side core pull 4 to slide synchronously with the first side core pull 3 after demolding.
[0048] Combination Figure 3 and Figure 4 The first sequential control mechanism includes a hydraulic cylinder 5, a sliding ejector rod 6, and a sliding guide hole 301. A slider body 7 is fixedly connected to the right side of the main core pull 2 by screws. The hydraulic cylinder 5 is fixedly connected to the moving mold by screws. A drive block 8 is fixedly connected to the output shaft of the hydraulic cylinder 5 by screws. The drive block 8 is fixedly connected to the slider body 7 by screws. The hydraulic cylinder 5 can drive the slider body 7 and the main core pull 2 to slide laterally. Additionally, the sliding ejector rod 6 is fixedly connected to the fixed mold by screws, and the sliding guide hole 301 is opened on the first side core pull 3. Both the sliding ejector rod 6 and the sliding guide hole 301 are inclined. When the moving molds move closer or further apart, the sliding ejector rod 6 can be used to push the first side core pull 3 to close or release the mold.
[0049] Combination Figure 7 and Figure 10In this embodiment, the second sequence control mechanism includes a driving unit and a holding unit. When the first side core pull 3 starts demolding before the main side core pull, the holding unit controls the second side core pull 4 to maintain a fixed position in the demolding direction of the first side core pull 3. The driving unit drives the second side core pull 4 to slide relative to the first side core pull 3 and move away from the main core pull 2 for demolding. Specifically, the holding unit includes an elastic retaining member and a first abutting surface 201 and a second abutting surface 401 that cooperate with each other. The first abutting surface 201 is formed on the main core pull 2, and the second abutting surface 401 is formed on the second side core pull 4. The first abutting surface 201 and the second abutting surface 401 are planarly fitted together. The elastic retaining member is connected between the second side core pull 4 and the first side core pull 3. Under the elastic force of the elastic retaining member, the first abutting surface 201 and the second abutting surface 401 abut against each other. In this embodiment, combined with Figure 5 , Figure 7 and Figure 11 The driving unit includes a sloping groove 302 and an inclined protrusion 402 disposed between the first side core pull 3 and the second side core pull 4. The inclined protrusion 402 and the sloping groove 302 are engaged at an angle. The inclined protrusion 402 is integrally formed on the second side core pull 4, and the sloping groove 302 is formed on the first side core pull 3. When the first side core pull 3 and the second side core pull 4 slide relative to each other, the second side core pull 4 can generate a lateral displacement relative to the first side core pull 3 under the cooperation of the inclined protrusion 402 and the sloping groove 302. At this time, the second side core pull 4 can move closer to or further away from the main core pull 2 to complete the mold closing or demolding of the second side core pull 4. Additionally, as... Figure 6 , Figure 8 , Figure 9 and Figure 10 As shown, in this embodiment, the elastic retainer is a support spring 9. The second side core 4 has a placement hole 403. The axial direction of the placement hole 403 is parallel to the direction in which the inclined protrusion 402 slides relative to the inclined groove 302. One end of the support spring 9 is located inside the placement hole 403, and the other end abuts against the first side core 3. Under the elastic force of the support spring 9, the first abutting surface 201 and the second abutting surface 401 can be in a state of mutual abutment. In order to facilitate the installation, fixing and subsequent replacement of the support spring 9, in this embodiment, a pressure plate 10 is fixedly connected to the first side core 3 by screws. The end of the support spring 9 that can extend outside the placement hole 403 abuts against the pressure plate 10.
[0050] Combination Figure 7 and Figure 10The third sequence control mechanism includes a positioning groove 404 and a positioning protrusion that cooperate with each other. In this embodiment, the positioning protrusion is a positioning stud 11. The positioning groove 404 is opened on the bottom surface of the second side core 4. The opening direction of the positioning groove 404 is parallel to the axial direction of the placement hole 403. During use, the top of the positioning protrusion is inserted into the positioning groove 404. When the second side core 4 is molded, the top of the positioning protrusion contacts the end of the positioning groove 404 near the drawer body 1. During the demolding process of the second side core 4, the positioning protrusion slides along the positioning groove 404. When the second side core 4 is demolded, the top of the positioning protrusion slides to contact the end of the positioning groove 404 away from the drawer body 1. At this time, when the first side core 3 continues to demold and slide away from the drawer body 1, it cannot continue to slide relative to the first side core 3 because the top of the positioning protrusion is in contact with the end of the positioning groove 404 away from the drawer body 1. This allows the second side core 4 to slide away from the drawer body 1 under the action of the positioning protrusion.
[0051] like Figure 11 As shown, in this embodiment, an elastic clamping member is connected to the moving mold and the first side core pull 3. When the first side core pull 3 is not subjected to external force, it is in the open mold state under the elastic force of the elastic clamping member. Specifically, the elastic clamping member includes a clamping spring 12. The first side core pull 3 has a clamping hole 303. One end of the clamping spring 12 is located in the clamping hole 303, and the other end abuts against the moving mold. In order to make the clamping spring 12 more stable, in this embodiment, the axial direction of the clamping hole 303 is set to be parallel to the demolding direction of the first side core pull 3.
[0052] In the actual application of this embodiment, after injection and pressure holding processes following mold closing, during the mold opening stage, the moving mold and the fixed mold first move away from each other to demold. During the process of the moving mold moving away from the fixed mold, under the sliding cooperation of the inclined ejector rod 6 and the inclined guide hole 301, the first side core pull 3 slides relative to the moving mold, and the sliding direction of the first side core pull 3 is the demolding direction away from the side of the drawer body 1. When the first side core pull 3 slides away from the drawer body 1 and demolds, the demolding of the side of the drawer body 1 can be completed smoothly. At the same time, when the first side core pull 3 slides and demolds, under the sliding cooperation of the inclined protrusion 402 and the inclined groove 302, and under the elastic support of the support spring 9, the second side core pull 4 can only slide along the length direction of the drawer body 1 to demold (that is, the second side core pull 4 slides away from the main core pull 2), and the first side core pull 3 remains fixed in the demolding direction. At this time, the second side core pull 4 is successfully demolded and the undercut 103 is formed.
[0053] When the second side core 4 slides relative to the main core 2 to complete the demolding action, the top of the positioning protrusion slides along the positioning groove 404 to the end of the positioning groove 404 away from the drawer body 1. Since the length of the undercut 103 is smaller than the demolding size of the drawer side structure, the first side core 3 has not yet completed the demolding action when the second side core 4 completes the demolding action. Therefore, the first side core 3 continues to slide away from the drawer body 1 under the driving action of the inclined ejector rod 6 until the first side core 3 completely exits the side of the drawer body 1 and completes the demolding action of the first side core 3. After the first side core 3 completes the demolding action, under the elastic force of the clamping spring 12, the first side core 3 and the moving mold are pressed against each other and the position of the moving mold is relatively stable, so that the inclined ejector rod 6 can be accurately inserted into the inclined guide hole 301 during subsequent mold closing to ensure accurate completion of the mold closing action. After the second side core pull 4 and the first side core pull 3 have both completed demolding, the output shaft of the hydraulic cylinder 5 extends. Through the intermediate driving action of the drive block 8, the slider body 7 and the main core pull 2 slide relative to the moving mold to complete the demolding of the main core pull 2. At this time, all demolding processes are completed. Then, the ejector pins in the existing technology are used to push the entire drawer out from the moving mold, and the injection molding of the drawer can be completed.
[0054] When the next mold closing occurs after the first drawer forming is completed, the hydraulic cylinder 5 first drives the main core pull 2 to reset. Then, the moving mold and the fixed mold approach each other and close. During the mold closing process, the inclined ejector rod 6 is inserted into the inclined guide hole 301. With the cooperation of the inclined ejector rod 6 and the inclined guide hole 301, the first side core pull 3 resets first. During the reset process of the first side core pull 3, the first abutting surface 201 and the second abutting surface 401 first contact and abut each other. After that, even if the first side core pull 3 continues to slide and reset relative to the moving mold, the second side core pull 4 cannot follow the first side core pull 3 to continue sliding in the sliding direction of the first side core pull 3. The second side core pull 4 slides relative to the first side core pull 3. At this time, under the sliding cooperation of the inclined groove 302 and the inclined protrusion 402, the second side core pull 4 can only slide along the direction close to the main core pull 2 and finally contact the main core pull 2 to complete the reset of the second side core pull 4. Then the first side core pull 3 also slides to the reset state, and the whole structure completes the mold closing and moving mold closing.
[0055] Example 2
[0056] The difference between Example 2 and Example 1 is as follows: Figure 12 and Figure 13As shown, to make the demolding process of the second side core pull 4 more precise and controllable, in this embodiment, a guide protrusion 202 is integrally formed on the main core pull 2, which is arranged along the demolding direction of the second side core pull 4. At the same time, a straight guide hole 405 that mates with the guide protrusion 202 is opened on the second side core pull 4. When the second side core pull 4 is in the mold-closed state, the guide protrusion 202 is inserted into the straight guide hole 405. When the second side core pull 4 and the main core pull 2 are engaged to close the mold, the mating length of the guide protrusion 202 and the straight guide hole 405 is greater than the dimension by which the second side core pull 4 moves along the demolding direction during demolding. For example, the depth of the undercut 103 in this embodiment. With a length of 1.7mm, the mating length between the guide protrusion 202 and the straight guide hole 405 can be set to 2mm. Thus, during the demolding process of the second side core pull 4, under the limiting action of the guide protrusion 202, the second side core pull 4 can only slide along the axial direction of the guide protrusion 202. That is, the second side core pull 4 can only slide away from the main core pull 2 for demolding. Only when the second side core pull 4 has completed demolding and the guide protrusion 202 has exited the straight guide hole 405 can the second side core pull 4 move together with the first side core pull 3 along the demolding sliding direction of the first side core pull 3, effectively ensuring the accuracy of the demolding process of the second side core pull 4.
[0057] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.
[0058] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.
Claims
1. A sequentially controlled demolding device, comprising a moving mold and a fixed mold that cooperate with each other, characterized in that: The moving mold is slidably connected to a main core puller and a first side core puller. A second side core puller for cooperating with the main core puller is slidably connected to the first side core puller. The demolding directions of the main core puller, the first side core puller, and the second side core puller are at an angle to each other. The moving mold is connected to a first sequence control mechanism for controlling the first side core puller to demold before the main core puller. A second sequence control mechanism is connected between the first side core puller and the main core puller. The second sequence control mechanism is used to control the second side core puller to demold synchronously when the first side core puller begins to demold. The second side core puller is provided with a third sequence control mechanism for controlling the second side core puller to slide synchronously with the first side core puller after demolding.
2. The sequentially controlled demolding device according to claim 1, characterized in that: The second sequence control mechanism includes a drive unit and a holding unit. When the first side core pull starts demolding before the main side core pull, the holding unit is used to control the second side core pull to keep its position fixed in the demolding direction of the first side core pull, and the drive unit is used to drive the second side core pull to slide relative to the first side core pull and move away from the main core pull to demold.
3. The sequentially controlled demolding device according to claim 1, characterized in that: An elastic clamping member is connected between the moving mold and the first side core puller. When the first side core puller is not subjected to external force, the first side core puller is in the mold open state.
4. The sequentially controlled demolding device according to claim 3, characterized in that: The elastic clamping component includes a clamping spring. A clamping hole is opened on the first side core puller. One end of the clamping spring is located in the clamping hole, and the other end abuts against the moving mold.
5. A sequentially controlled demolding device according to claim 2, characterized in that: The retaining unit includes an elastic retaining member and a first abutting surface and a second abutting surface that cooperate with each other. The first abutting surface is disposed on the main core puller, and the second abutting surface is disposed on the second side core puller. The elastic retaining member is connected between the second side core puller and the first side core puller. When the second side core puller is in the mold closed state, the first abutting surface and the second abutting surface abut against each other under the elastic force of the elastic retaining member. The driving unit includes a sloping groove and an inclined protrusion disposed between the first side core puller and the second side core puller. The inclined protrusion and the sloping groove are engaged by an inclined surface.
6. A sequentially controlled demolding device according to claim 5, characterized in that: The elastic retainer includes a support spring, and a placement hole is opened on the second side core. The axial direction of the placement hole is parallel to the direction in which the inclined protrusion slides relative to the inclined groove. One end of the support spring is located in the placement hole, and the other end abuts against the first side core.
7. A sequentially controlled demolding device according to claim 6, characterized in that: A pressure plate that communicates with the placement hole is fixedly connected to the first side core puller, and the end of the support spring away from the second side core puller abuts against the pressure plate.
8. A sequentially controlled demolding device according to claim 1, characterized in that: The main core pull is provided with a guide protrusion along the demolding direction of the second side core pull, and the second side core pull is provided with a straight guide hole that cooperates with the guide protrusion. When the second side core pull and the main core pull are engaged to close the mold, the length of the cooperation between the guide protrusion and the straight guide hole is greater than the length of the movement of the second side core pull along the demolding direction when it is demolded.
9. A sequentially controlled demolding device according to any one of claims 1-8, characterized in that: The first sequence control mechanism includes a hydraulic cylinder and a slidably fitted inclined ejector rod and an inclined guide hole. The hydraulic cylinder is connected between the moving mold and the main core puller, the inclined ejector rod is fixedly connected to the fixed mold, and the inclined guide hole is opened on the first side core puller.
10. A sequentially controlled demolding device according to any one of claims 1-8, characterized in that: The third sequence control mechanism includes a positioning groove and a positioning protrusion that cooperate with each other. The positioning protrusion is fixedly connected to the first side core puller, and the positioning groove is set on the second side core puller. One end of the positioning protrusion is inserted into the positioning groove. When the second side core puller closes the mold, the positioning protrusion contacts one end of the positioning groove. When the second side core puller completes demolding, the positioning protrusion contacts the other end of the positioning groove.