Plastic insert internal thread secondary encapsulation anti-sloughing mold structure

Abstract

The utility model provides a plastic insert internal thread secondary encapsulation anti-collapse mold structure, which relates to the technical field of injection molds, and comprises a tooth advancing and retreating mechanism adaptively connected with a mold main body, and the tooth advancing and retreating mechanism comprises an anti-collapse tooth sleeve and a driving assembly, one end of the anti-collapse tooth sleeve is provided with an external thread which is spirally matched with an internal thread of a plastic insert, the other end of the anti-collapse tooth sleeve is matched with the advancing and retreating tooth sleeve to form an advancing and retreating thread pair, and the anti-collapse tooth sleeve is configured to be driven by the driving assembly to rotate; and the external thread is screwed into the internal thread of the plastic insert under the action of the advancing and retreating thread pair, so that the internal thread of the plastic insert is supported during secondary rubber coating, and the problem that the internal thread of the plastic insert is easy to deform and collapse during secondary rubber coating is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to a secondary rubber-encapsulated anti-collapse mold structure for internal threads of plastic inserts. Background Art

[0002] At present, when plastic inserts with internal threads in molds are encapsulated for the second time, the inserts will be heated for the second time, causing the insert material to soften, and then the internal threads of the inserts will deform and collapse, resulting in the failure of the internal threads and overflow in the finished product after encapsulation. This phenomenon has become a technical difficulty in the secondary encapsulation of plastic inserts with internal threads. Utility Model Content

[0003] The utility model discloses a secondary rubber-coating anti-collapse mold structure for internal threads of plastic inserts, aiming to improve the problem that the internal threads of plastic inserts are easily deformed and collapsed during secondary rubber-coating.

[0004] The utility model adopts the following scheme:

[0005] A plastic insert internal thread secondary encapsulation anti-collapse mold structure, including an advance and retreat mechanism adaptably connected to a mold body, the advance and retreat mechanism including an anti-collapse tooth brace and a drive assembly, the anti-collapse tooth brace having one end provided with an external thread for spirally cooperating with the plastic insert internal thread, and the other end for cooperating with the advance and retreat tooth brace to form an advance and retreat thread pair, the anti-collapse tooth brace being configured to be driven to rotate by the drive assembly so that the external thread is screwed into the plastic insert internal thread under the action of the advance and retreat thread pair, thereby supporting the plastic insert internal thread during secondary encapsulation.

[0006] As a further improvement, the driving assembly includes a driving member and a first gear set adapted to be connected to the driving member, the first gear set is driven to rotate by the driving member and meshes with the brace gear on the anti-collapse brace.

[0007] As a further improvement, the first gear set includes a driving gear and a transmission gear, the driving gear is coupled to the driving member for rotation, and the transmission gear is meshed with the driving gear.

[0008] As a further improvement, the driving member can drive the active gear to rotate in the first direction or the second direction, so that the transmission gear can synchronously drive the socket gear to rotate, and the corresponding external thread on the anti-collapse socket is screwed into or out of the internal thread of the plastic insert to realize the opening and closing of the mold.

[0009] As a further improvement, it also includes a limit assembly, which has a limit block, a rack and a second gear set, the limit block is fixedly connected to the mold body, the rack is meshed with the second gear set, the second gear set is meshed with the driving gear, and the rack is constructed to move back and forth under the action of the second gear set and the driving gear; when the starting block on the rack collides with the starting travel switch on the limit block to limit the position or the ending block on the rack collides with the ending travel switch on the limit block to limit the position, the driving gear is forced to stop rotating.

[0010] As a further improvement, the second gear set includes a pinion and a gear that are coaxially arranged, wherein the pinion is meshed with the rack, and the gear is meshed with the driving gear.

[0011] As a further improvement, the starting travel switch and the ending travel switch are both electrically connected to a control member, and the control member controls the driving member to stop by receiving signals transmitted by the travel switches.

[0012] As a further improvement, the driving member is a hydraulic motor or an electric motor.

[0013] By adopting the above technical solution, the utility model can achieve the following technical effects:

[0014] The present application sets up a tooth advancing and retreating mechanism, and when the plastic insert is encapsulated for the second time, the outer screw on the anti-collapse tooth cap is inserted into the inner thread of the plastic insert, so that the inner thread of the plastic insert can be effectively supported, avoiding deformation and collapse due to softening of the material and lack of support, and ensuring the injection molding quality of the secondary encapsulated product. Compared with the existing technology, the advantages of the present application are obvious. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a cross-sectional view of one embodiment of the utility model;

[0017] Figure 2 yes Figure 1 Schematic diagram after hiding part of the main structure of the mold;

[0018] Figure 3 It is a structural schematic diagram of a limit assembly in one embodiment of the utility model;

[0019] Figure 4 yes Figure 3 Sectional view of AA in the middle;

[0020] Figure 5 It is a structural schematic diagram of one embodiment of the utility model;

[0021] Figure 6 yes Figure 5 Schematic diagram of the structure from another perspective;

[0022] Figure 7 This is a schematic structural diagram of a secondary encapsulation product according to one embodiment of the present utility model;

[0023] Figure 8 yes Figure 7 A cross-sectional view along one of the sections.

[0024] icon:

[0025] 1-Mold body;

[0026] 2-anti-collapse brace; 21-external thread; 22-brace gear;

[0027] 31-driving member; 32-driving gear; 33-transmission gear;

[0028] 4-Advance and retract braces;

[0029] 5-Plastic insert internal thread;

[0030] 61-limit block; 611-starting travel switch; 612-ending travel switch; 62-rack; 621-starting block; 622-ending block; 63-small gear; 64-large gear. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0032] Example

[0033] Combination Figures 1 to 8 , this embodiment provides a secondary encapsulation anti-collapse mold structure for internal threads of plastic inserts, including an advance and retreat mechanism that is adaptively connected to the mold body 1. The advance and retreat mechanism can be configured on the movable mold of the mold body 1 and set along the opening and closing direction, or set on the peripheral side of the mold body 1 perpendicular to or at an angle to the opening and closing direction. One or more advance and retreat mechanisms can be set on the same mold body 1, and are selected according to the position of the insert thread and the number of mold cavities, without specific limitation. The advance and retreat mechanism includes an anti-collapse tooth brace 2 and a drive assembly. Among them, one end of the anti-collapse tooth brace 2 is provided with an external thread 21 (first external thread) for spirally matching with the internal thread 5 of the plastic insert, and the other end is used to match with the advance and retreat tooth brace 4 to form an advance and retreat thread pair. The anti-collapse tooth brace 2 is configured to be driven to rotate by the drive assembly so that the external thread 21 is screwed into the internal thread 5 (first internal thread) of the plastic insert under the action of the advance and retreat thread pair, thereby supporting the internal thread 5 of the plastic insert during the secondary encapsulation. Exemplarily, the advancement and retraction braces 4 are arranged on the mold body 1 and are limitedly connected to the mold body 1. The advancement and retraction braces 4 are provided with a second internal thread, which is matched with the second external thread on the anti-collapse braces 2 to form an advancement and retraction thread pair. When opening the mold, the external thread 21 on the anti-collapse braces 2 is first screwed out from the internal thread 5 of the plastic insert. When closing the mold, after the mold body 1 is closed, the external thread 21 on the anti-collapse braces 2 is screwed into the internal thread 5 of the plastic insert.

[0034] It should be noted that, in this embodiment, by providing an advancement and retraction mechanism, when the plastic insert is encapsulated for the second time, the external thread 21 on the anti-collapse brace 2 is screwed into the internal thread 5 of the plastic insert, so that the internal thread 5 of the plastic insert can be effectively supported to avoid deformation and collapse due to softening of the material and lack of support, thereby ensuring the injection molding quality of the secondary encapsulated product.

[0035] In a preferred embodiment, the driving assembly includes a driving member 31 and a first gear set adapted to be connected to the driving member 31. The driving member 31 is preferably a hydraulic motor or an electric motor. The first gear set is driven to rotate by the driving member 31 and meshes with the toothed brace gear 22 on the anti-collapse toothed brace 2. Further, the first gear set includes a driving gear 32 and a transmission gear 33, the driving gear 32 is coupled to the driving member 31 for rotation, and the transmission gear 33 is meshed with the driving gear 32. In other embodiments, multiple transmission gears 33 may also be provided without specific limitation.

[0036] Preferably, the driving member 31 can drive the active gear 32 to rotate in the first direction or the second direction, and the transmission gear 33 synchronously drives the toothed brace gear 22 to rotate, corresponding to the external thread 21 on the anti-collapse toothed brace 2 being screwed into or out of the internal thread 5 of the plastic insert, thereby realizing the mold opening and closing action. It should be mentioned that the second direction is the opposite direction of the first direction, for example, the first direction is the clockwise direction, and the second direction is the counterclockwise direction. When closing the mold, the driving member 31 drives the active gear 32 to rotate in the clockwise direction, so that the external thread 21 on the anti-collapse toothed brace 2 is screwed into the internal thread 5 of the plastic insert; when opening the mold, the driving member 31 drives the active gear 32 to rotate in the counterclockwise direction, so that the external thread 21 on the anti-collapse toothed brace 2 is screwed out of the internal thread 5 of the plastic insert.

[0037] On the basis of the above-mentioned embodiment, an optional embodiment of the utility model further includes a limit assembly, which includes a limit block 61, a rack 62 and a second gear set, wherein the limit block 61 is fixedly connected to the mold body 1, the rack 62 is meshed with the second gear set, the second gear set is meshed with the driving gear 32, and the rack 62 is configured to reciprocate under the action of the second gear set and the driving gear 32; when the starting block 621 on the rack 62 collides with the starting travel switch 611 on the limit block 61 to limit the position or the ending block 622 on the rack 62 collides with the ending travel switch 612 on the limit block 61 to limit the position, the driving gear 32 is forced to stop rotating. For example, the two ends of the rack 62 are respectively provided with a starting travel switch 611 and an ending travel switch 612, and the limit block 61 is correspondingly provided with a starting block 621 and an ending block 622. When closing the mold, the driving member 31 drives the driving gear 32 to rotate in the first direction, and the rack 62 moves under the action of the second gear set. When the starting stroke switch 611 on the rack 62 collides with the starting stroke switch 611 on the limit block 61, the second gear set stops rotating, thereby forcing the driving gear 32 to stop rotating. When opening the mold, the driving member 31 drives the driving gear 32 to rotate in the second direction, and the rack 62 moves under the action of the second gear set. When the ending stroke switch 612 on the rack 62 collides with the ending stroke switch 612 on the limit block 61, the second gear set stops rotating, thereby forcing the driving gear 32 to stop rotating. During the process of opening and closing the mold, the screw-in length of the external thread 21 on the anti-collapse tooth cap 2 is guaranteed to ensure a smooth demoulding process.

[0038] Preferably, in one embodiment, the second gear set includes a coaxially arranged pinion 63 and a large gear 64, wherein the pinion 63 meshes with the rack 62, and the large gear 64 meshes with the driving gear 32. The diameter of the pinion 63 is smaller than the diameter of the large gear 64, which facilitates the installation of each gear and makes the structure more compact.

[0039] Furthermore, the start travel switch 611 and the end travel switch 612 are both electrically connected to the control member, and the control member controls the driving member 31 to stop by receiving the signal transmitted by the travel switch. It should be mentioned that in this embodiment, the block collides with the travel switch to form a mechanical limit, and the travel switch transmits the corresponding signal to the control member to realize the electric control limit, which can avoid mold problems caused by circuit control failure. Among them, the circuit principle of the control member is the existing technology and will not be repeated here.

[0040] The above are only preferred implementations of the present utility model. The protection scope of the present utility model is not limited to the above embodiments. All technical solutions under the concept of the present utility model belong to the protection scope of the present utility model.

Claims

1. A plastic insert internal thread secondary encapsulation anti-collapse mold structure, characterized in that: It includes an advancement and retraction mechanism adaptably connected to the mold body, the advancement and retraction mechanism includes an anti-collapse brace and a drive assembly, one end of the anti-collapse brace is provided with an external thread for spirally cooperating with the internal thread of the plastic insert, and the other end is used to cooperate with the advancement and retraction brace to form an advancement and retraction thread pair, the anti-collapse brace is configured to be driven to rotate by the drive assembly so that the external thread is screwed into the internal thread of the plastic insert under the action of the advancement and retraction thread pair, thereby supporting the internal thread of the plastic insert during secondary encapsulation.

2. The plastic insert internal thread secondary encapsulation anti-collapse mold structure according to claim 1, characterized in that: The driving assembly includes a driving member and a first gear set adapted to be connected to the driving member. The first gear set is driven to rotate by the driving member and meshes with the toothed brace gear on the anti-collapse toothed brace.

3. The plastic insert internal thread secondary encapsulation anti-collapse mold structure according to claim 2, characterized in that: The first gear set includes a driving gear and a transmission gear. The driving gear is coupled to the driving member for rotation, and the transmission gear is meshed with the driving gear.

4. The plastic insert internal thread secondary encapsulation anti-collapse mold structure according to claim 3, characterized in that: The driving member can drive the active gear to rotate along the first direction or the second direction, so that the transmission gear can synchronously drive the socket gear to rotate, and the external thread on the corresponding anti-collapse socket can be screwed into or out of the internal thread of the plastic insert to realize the opening and closing of the mold.

5. The plastic insert internal thread secondary encapsulation anti-collapse mold structure according to claim 3, characterized in that: It also includes a limit assembly, which has a limit block, a rack and a second gear set, the limit block is fixedly connected to the mold body, the rack is meshed with the second gear set, the second gear set is meshed with the driving gear, and the rack is configured to move back and forth under the action of the second gear set and the driving gear; when the starting block on the rack collides with the starting travel switch on the limit block to limit the position or the ending block on the rack collides with the ending travel switch on the limit block to limit the position, the driving gear is forced to stop rotating.

6. The plastic insert internal thread secondary encapsulation anti-collapse mold structure according to claim 5, characterized in that: The second gear set includes a pinion gear and a gearwheel that are coaxially arranged, wherein the pinion gear is meshed with the rack gear, and the gearwheel is meshed with the driving gear.

7. The plastic insert internal thread secondary encapsulation anti-collapse mold structure according to claim 5, characterized in that: The starting travel switch and the ending travel switch are both electrically connected to the control member, and the control member controls the driving member to stop by receiving signals transmitted by the travel switches.

8. The plastic insert internal thread secondary encapsulation anti-collapse mold structure according to any one of claims 2 to 7, characterized in that: The driving member is a hydraulic motor or an electric motor.

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