Encapsulated core mold structure

Abstract

The utility model relates to die technical field discloses a kind of encapsulation core-pulling die structure, including die, and several slot positions are shaped in die inside;And slot position is symmetrically equipped with left core-pulling block, right core-pulling block in it;And the inside surface of left core-pulling block and right core-pulling block is equipped with extension part;And extension part between still is equipped with upper core-pulling block;And the outside surface of left core-pulling block and right core-pulling block is equipped with the driving block of driving its up-down movement;And driving block is driven by ejector pin module being set in the lower of die;By being set left core-pulling block, right core-pulling block symmetrically in die interior, and extension part is equipped with in its inside, middle cooperation upper core-pulling block, form three-way limit and core-pulling structure to encapsulation forming area;Left and right core-pulling block outside is equipped with the driving block that can be driven by ejector pin module, by the up-top action of ejector pin module driving core-pulling block to move up and down, realize the sequential stripping of encapsulation part after forming to workpiece;And it is small to occupy die space.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and specifically to a core-pulling mold structure for overmolding. Background Technology

[0002] A mold is a specialized piece of equipment used to shape materials. By applying pressure, temperature, or other conditions within a cavity of a specific shape, it molds the raw material into the desired shape and size of a part. Molds are widely used in injection molding, stamping, die casting, forging, extrusion, and other processing fields. The current market has the following problems: The current core-pulling mold structure occupies a large space in the mold. We need to develop a mold structure that occupies less space for core pulling and demolding after the product is formed. The technical problem to be solved by this utility model is to provide a core-pulling mold structure that occupies a small space. Utility Model Content

[0003] The technical problem solved by this utility model is to provide a core-pulling mold structure with a small footprint. By setting symmetrical left and right core-pulling blocks inside the mold core, and providing extensions on their inner sides, and cooperating with the middle core-pulling block, a three-way limiting and core-pulling structure for the overmolding area is formed. The outer sides of the left and right core-pulling blocks are provided with driving blocks that can be driven by the ejector pin module. The upward action of the ejector pin module drives the core-pulling blocks to move up and down, realizing the sequential demolding of the overmolded part of the part after molding. This not only ensures the molding quality of the overmolded area, but also avoids the overmolding damage caused by direct hard pulling demolding, improves the reliability of the core-pulling action and product consistency, and occupies little space inside the mold.

[0004] A core-pulling mold structure for overmolding includes a mold core with several slots formed therein; a left core-pulling block and a right core-pulling block are symmetrically arranged in each slot; an extension is provided on the inner side of each of the left and right core-pulling blocks; an upper core-pulling block is provided between the extensions; a drive block is provided on the outer side of each of the left and right core-pulling blocks to drive their up and down movement; and the drive block is driven by an ejector pin assembly located below the mold core.

[0005] Preferably, it also includes a middle plate; and the middle plate is provided with a rear mold; and the mold core is disposed inside the rear mold.

[0006] Preferably, the bottom of the middle plate is provided with two guard plates spaced apart; and a bottom plate is provided below the middle plate; and an ejector plate is provided between the middle plate and the bottom plate.

[0007] Preferably, both the left and right core-pulling blocks are formed with elongated grooves; and a limiting rod passing through the elongated grooves is fixedly provided on the middle plate.

[0008] Preferably, the ejector module includes a horizontally arranged ejector plate; and the ejector plate is provided with a plurality of ejector pins; and the ejector pins pass through the middle plate and are connected to the bottom of the left core-pulling block, the bottom of the right core-pulling block, and the bottom of the upper core-pulling block.

[0009] Preferably, guide blocks are fixedly provided on both sides of the middle plate; and the guide blocks are formed with grooves; and sliders are fixedly provided on both sides of the ejector plate; and the sliders and the grooves are in sliding engagement.

[0010] Preferably, the cross-sections of both the left and right core-pulling blocks are crescent-shaped.

[0011] Preferably, both the left and right core-pulling blocks have several micro-vent holes formed on their surfaces.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: The core-pulling mold structure of this utility model, by setting symmetrical left and right core-pulling blocks inside the mold core, and providing extensions on their inner sides, and cooperating with the core-pulling block in the middle, forms a three-way limiting and core-pulling structure for the overmolding area; the outer sides of the left and right core-pulling blocks are provided with driving blocks that can be driven by the ejector pin module. The upward action of the ejector pin module drives the core-pulling blocks to move up and down, realizing the sequential demolding of the overmolded part of the part after molding. This not only ensures the molding quality of the overmolded area, but also avoids the overmolding damage caused by direct hard pulling demolding, improves the reliability of the core-pulling action and product consistency, and occupies little space inside the mold.

[0013] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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 these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the rear mold structure of this utility model.

[0016] Figure 2 This is a utility model Figure 1 A schematic diagram of the internal structure.

[0017] Figure 3 This is a schematic diagram of the core-pulling block and product structure of this utility model.

[0018] Figure 4 This is a schematic diagram of the drive block structure of this utility model.

[0019] In the diagram: 1. Mold core; 2. Slot; 3. Left core-pulling block; 4. Right core-pulling block; 5. Extension; 6. Upper core-pulling block; 7. Drive block; 8. Middle plate; 10. Rear mold; 11. Protective plate; 12. Base plate; 13. Ejector plate; 14. Long slot; 15. Limiting rod; 16. Ejector pin; 17. Guide block; 18. Slide groove; 19. Slider; 20. Product. Detailed Implementation

[0020] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] It should be noted that the terms "first," "second," etc., used in this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this disclosure described herein can be implemented in orders other than those illustrated or described herein. The implementation methods described in the following exemplary embodiments do not represent all implementation methods consistent with this disclosure.

[0022] Please see Figures 1-4 In this embodiment of the utility model, a core-pulling mold structure for overmolding includes a mold core 1; the mold core 1 has a plurality of slots 2 formed therein; and a left core-pulling block 3 and a right core-pulling block 4 are symmetrically arranged in each slot 2; and the inner sides of the left core-pulling block 3 and the right core-pulling block 4 are provided with extensions 5; and an upper core-pulling block 6 is provided between the extensions 5; and the outer sides of the left core-pulling block 3 and the right core-pulling block 4 are provided with driving blocks 7 for driving their up and down movement; and the driving blocks 7 are driven by an ejector pin 16 module arranged below the mold core 1, and occupy a small space inside the mold.

[0023] Specifically, by setting symmetrical left and right core-pulling blocks 3 and 4 inside the mold core 1, and providing extensions 5 on their inner sides, and cooperating with a core-pulling block 6 in the middle, a three-way limiting and core-pulling structure for the overmolding area is formed; the outer sides of the left and right core-pulling blocks 4 are provided with driving blocks 7 that can be driven by the ejector pin 16 module. The upward action of the ejector pin 16 module drives the core-pulling blocks to move up and down, realizing the sequential demolding of the overmolding part of the part after molding. This not only ensures the molding quality of the overmolding area, but also avoids overmolding damage caused by direct hard pulling demolding, and improves the reliability of the core-pulling action and product consistency.

[0024] Furthermore, it also includes a middle plate 8; and a rear mold 10 is provided on the middle plate 8; and the mold core 1 is provided inside the rear mold 10.

[0025] Specifically, by installing the rear mold 10 on the middle plate 8 and embedding the mold core 1 inside the rear mold 10, the mold forms a complete rear mold 10 bearing and positioning system. The middle plate 8 serves to support and fix the rear mold 10, while the rear mold 10 provides external coverage and precise positioning for the mold core 1, so that the mold core 1 remains stable during molding and core pulling, and is not prone to displacement, thereby improving the overall structural strength and molding accuracy of the mold, ensuring the consistency of part dimensions and the reliability of mold operation. Of course, a front mold is also required in practice, which is common knowledge in this field and will not be elaborated here.

[0026] Furthermore, the bottom of the middle plate 8 is provided with two guard plates 11 spaced apart; and a bottom plate 12 is provided below the middle plate 8; and a pin plate 13 is provided between the middle plate 8 and the bottom plate 12.

[0027] Specifically, by setting guard plates 11 at intervals at the bottom of the middle plate 8 and arranging a base plate 12 below the middle plate 8, and placing an ejector plate 13 between the middle plate 8 and the base plate 12, a stable multi-layer support and guiding system is formed. The guard plates 11 protect the internal ejector pin 16 mechanism and prevent foreign objects from entering. The middle plate 8 and the base plate 12 together provide an overall rigid frame, while the ejector plate 13 can achieve reliable up and down ejection under fixed guidance, thereby ensuring that the ejector pin 16 module drives the core pulling and ejection of parts smoothly and with uniform force, further improving the mold service life and demolding efficiency.

[0028] Furthermore, both the left core-pulling block 3 and the right core-pulling block 4 are formed with elongated grooves 14; and the middle plate 8 is fixedly provided with a limiting rod 15 that passes through the elongated grooves 14.

[0029] Specifically, by forming elongated grooves 14 on the left and right core-pulling blocks 4, and setting limiting rods 15 passing through the grooves 2 on the middle plate 8, the core-pulling blocks can only move within the limited distance of the elongated grooves 14 under the drive of the drive block 7. They can move up and down with the drive block 7, and even move slightly at an angle along the limiting rods 15 with the up and down movement, thus achieving better core pulling and demolding. The specific length of the elongated grooves 14 can be adjusted according to actual needs. The attached figure is only an example.

[0030] Furthermore, the ejector pin 16 module includes a horizontally arranged ejector pin plate 13; and the ejector pin plate 13 is provided with a plurality of ejector pins 16; and the ejector pins 16 pass through the middle plate 8 and are connected to the bottom of the left core-pulling block 3, the bottom of the right core-pulling block 4, and the bottom of the upper core-pulling block 6.

[0031] Specifically, by setting a horizontally arranged ejector plate 13 in the ejector plate 16 module, and installing multiple ejector pins 16 on the ejector plate 13, the ejector pins 16 can pass through the middle plate 8 and directly connect to the bottom of the left core-pulling block 3, the right core-pulling block 4, and the upper core-pulling block 6, thereby realizing that the ejector plate 13 uniformly drives multiple core-pulling blocks to perform core-pulling actions synchronously or sequentially; by the overall rise of the ejector plate 13, the core-pulling blocks are moved upward, realizing the smooth demolding of the overmolded parts, avoiding the asynchronous and jamming problems caused by individual driving, improving the coordination and stability of the core-pulling action, and further ensuring the appearance quality of the parts and the reliability of mold operation; preferably, the extension 5 can be made of a material with a certain degree of flexibility, thereby enabling better core-pulling demolding.

[0032] Furthermore, guide blocks 17 are fixedly provided on both sides of the middle plate 8; and guide blocks 17 are formed with grooves 18; and sliders 19 are fixedly provided on both sides of the ejector plate 13; and sliders 19 and grooves 18 slide in a sliding fit.

[0033] Specifically, by fixing guide blocks 17 on both sides of the middle plate 8 and forming grooves 18 on them, and simultaneously setting sliders 19 on both sides of the ejector plate 13 to cooperate with them, the ejector plate 13 is precisely guided by the grooves 18 during its up and down movement, avoiding skewing or jamming due to uneven force during ejection or core pulling; the sliding cooperation between the sliders 19 and the grooves 18 not only ensures the smoothness and positioning accuracy of the ejector plate 13 movement, but also improves the reliability of core pulling and ejection actions, thereby ensuring smooth overall mold operation, longer service life, and more stable part forming quality; preferably, springs can also be added to the ejector pin 16 module to play a buffering and reset role.

[0034] Furthermore, the cross-sections of both the left core-pulling block 3 and the right core-pulling block 4 are crescent-shaped.

[0035] Specifically, the cross-sections of the left core-pulling block 3 and the right core-pulling block 4 are formed into crescent shapes, so that when they mate with the slot 2 of the mold core 1 and the upper core-pulling block 6, they can form an arc-shaped covering structure of the overmolding area, thereby better conforming to the shape of the part and ensuring uniform molding of the overmolding layer; the crescent-shaped cross-section can also reduce the contact area between the core and the part during core pulling, reduce demolding resistance, avoid the overmolding layer being torn or damaged, improve the smoothness of core pulling and the appearance quality of the product, and at the same time improve the molding accuracy and stability of the mold.

[0036] Furthermore, the surfaces of both the left core-pulling block 3 and the right core-pulling block 4 are formed with several micro ventilation holes.

[0037] Specifically, several micro-vent holes are formed on the surfaces of the left and right core-pulling blocks 4. These holes allow air to be expelled from the cavity during the overmolding and injection molding process, preventing defects such as air bubbles, scorching, or incomplete overmolding caused by gas retention. At the same time, the small size of the vent holes does not affect the strength of the core-pulling blocks or the quality of the molding surface. They also help reduce vacuum suction during demolding, making the core-pulling action smoother, thereby further improving the appearance quality of the parts and the stability of the mold forming.

[0038] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. A core-pulling mold structure for overmolding, comprising a mold core (1); characterized in that, The mold core (1) has several slots (2) formed inside; and each slot (2) is symmetrically provided with a left core-pulling block (3) and a right core-pulling block (4); and the inner sides of the left core-pulling block (3) and the right core-pulling block (4) are provided with extensions (5); and an upper core-pulling block (6) is provided between the extensions (5); and the outer sides of the left core-pulling block (3) and the right core-pulling block (4) are provided with driving blocks (7) to drive them to move up and down; and the driving blocks (7) are driven by the ejector pin (16) module located below the mold core (1).

2. The overmolded core-pulling mold structure according to claim 1, characterized in that, It also includes a middle plate (8); and a rear mold (10) is provided on the middle plate (8); and the mold core (1) is provided inside the rear mold (10).

3. The overmolded core-pulling mold structure according to claim 2, characterized in that, Both the left core-pulling block (3) and the right core-pulling block (4) are formed with elongated grooves (14); and a limiting rod (15) passing through the elongated grooves (14) is fixed on the middle plate (8).

4. The core-pulling mold structure for overmolding according to claim 2, characterized in that, The ejector pin (16) module includes a horizontally arranged ejector pin plate (13); and the ejector pin plate (13) is provided with several ejector pins (16); and the ejector pins (16) pass through the middle plate (8) and are connected to the bottom of the left core-pulling block (3), the bottom of the right core-pulling block (4), and the bottom of the upper core-pulling block (6).

5. The overmolded core-pulling mold structure according to claim 4, characterized in that, Two guard plates (11) are provided at a distance from the bottom of the middle plate (8); and a bottom plate (12) is provided below the middle plate (8); and a pin plate (13) is provided between the middle plate (8) and the bottom plate (12).

6. The overmolded core-pulling mold structure according to claim 4, characterized in that, Guide blocks (17) are fixedly provided on both sides of the middle plate (8); and guide blocks (17) are formed with grooves (18); and sliders (19) are fixedly provided on both sides of the ejector plate (13); and sliders (19) and grooves (18) slide together.

7. The overmolded core-pulling mold structure according to claim 1, characterized in that, The cross-sections of both the left core-pulling block (3) and the right core-pulling block (4) are crescent-shaped.

8. The overmolded core-pulling mold structure according to claim 1, characterized in that, The surfaces of the left core-pulling block (3) and the right core-pulling block (4) are each formed with several micro ventilation holes.

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