Die structure of composite pitched roof

Abstract

The utility model relates to a mold structure of a composite pitched roof, which belongs to the technical field of molds, and comprises a bottom mold, a plurality of sliding cavities are arranged on the bottom mold, a partition plate is arranged in the middle of each sliding cavity to form a first slide way and a second slide way, and a straight ejector rod is connected in the first slide way in an up-and-down sliding mode and connected in the second slide way in an up-and-down sliding mode. The upper end of the straight ejector rod is used for directly ejecting a product, the inclined ejector rod is connected into the second sliding way in an up-and-down sliding mode, and the ejector pin is connected to the bottom die in an up-and-down sliding mode and located on one side of the sliding cavity. According to the mold structure of the composite angle ejector, through the cooperative action of the straight ejector rod, the angle ejector rod and the ejector rod, one-time demolding of a multi-direction inverted buckle of a product is achieved, the angle ejector rod moves along the second direction, lateral core pulling is synchronously completed in the ejection process, it is ensured that the inverted buckle part is completely separated, the problem that a traditional mold needs to be ejected step by step for multiple times is solved, meanwhile, the product can be prevented from being damaged, and the production efficiency is improved. And the demolding efficiency of the product is greatly improved, and the quality of the product is ensured.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, specifically to a composite inclined top mold structure. Background Technology

[0002] A mold is a tool used to manufacture parts with specific shapes, sizes, and surface textures. It is a tool that transforms raw materials into final products through various molding processes. Molds are crucial production equipment in many industrial fields, such as automobiles, electronics, home appliances, and medical devices. Mold ejection refers to the process in which, after the product is formed in the mold during molding processes such as injection molding and die casting, the product is pushed out of the mold cavity by an ejection device. This process is mainly used to ensure that the product can be demolded smoothly and to prevent the product from getting stuck or deformed.

[0003] In injection molds, for products with undercut structures, traditional molds typically use a single angled ejector or straight ejector structure to complete demolding. However, this is insufficient to meet the complex demolding requirements of multi-directional undercut products. In existing technologies, the linkage between angled ejectors and straight ejectors is insufficient, resulting in low demolding efficiency or product damage. Therefore, a composite angled ejector mold structure is proposed to solve the aforementioned technical problem of low demolding efficiency. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a composite inclined mold structure that offers high demolding efficiency and solves the problem of low demolding efficiency.

[0005] To achieve the above objectives, the present invention provides the following technical solution: including a bottom mold, wherein a plurality of sliding cavities are provided on the bottom mold, and a partition is provided in the middle of the sliding cavity to form a first slide and a second slide;

[0006] A straight push rod is slidably connected in the first slide rail, and the upper end of the straight push rod is used to directly support the product;

[0007] An inclined push rod, which is slidably connected to the second slide rail;

[0008] Ejector pin, which is slidably connected to the bottom mold and located on one side of the sliding cavity, is used for secondary ejection of the product.

[0009] Furthermore, the first slide is a vertically arranged cavity, and the bottom of the second slide extends at an angle towards the first slide, with the first slide and the second slide being arranged opposite each other.

[0010] Furthermore, a third slide is provided on the bottom mold, the third slide is vertically arranged on the bottom mold, and the ejector pin is installed in the third slide.

[0011] Furthermore, the third slide is a vertically arranged cavity, and the ejector pin is slidably connected to the third slide in the vertical direction.

[0012] Furthermore, the third slide is fitted with the ejector pin with a clearance, and the third slide is arranged parallel to the first slide.

[0013] Furthermore, the tops of the straight push rod, the angled push rod, and the ejector pin are all located on the same horizontal plane, and the tops of the straight push rod, the angled push rod, and the ejector pin all abut against the bottom of the product.

[0014] Furthermore, the side wall of the sliding cavity is provided with a snap-fit ​​groove, which is located on the movement path of the inclined push rod and is used to form the inverted snap structure of the product.

[0015] Furthermore, a driving mechanism is provided below the bottom mold. The driving mechanism is connected to the straight ejector rod, the inclined ejector rod, and the ejector pin, and is used to control the linkage action of the three.

[0016] Furthermore, the cross-sectional shape of both the straight push rod and the angled push rod is rectangular, while the cross-sectional shape of the push pin is circular.

[0017] Furthermore, the tops of the straight ejector and the angled ejector both contact the bottom surface of the product. During demolding, the angled ejector first moves upward along the second slide to complete the lateral core pulling, and the straight ejector then moves upward in the first slide to hold the product.

[0018] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0019] 1. The mold structure of this composite inclined ejector achieves one-time demolding of the product with multi-directional undercuts through the coordinated action of the straight ejector, the inclined ejector, and the ejector rod. The inclined ejector moves along the second movement and simultaneously completes the lateral core pulling during the ejection process, ensuring that the undercut parts are completely detached. This avoids the problem of multiple steps of ejection required by traditional molds, and also prevents product damage, greatly improving the demolding efficiency and ensuring product quality.

[0020] 2. The mold structure of this composite inclined top, by setting a sliding cavity and a snap-fit ​​groove, ensures that the undercut part of the product is formed completely in one step, avoiding the defects of insufficient filling or deformation of the undercut part that are common in traditional molds, thus improving the dimensional accuracy of the product. At the same time, the inclined slide layout makes the first slide and the second slide form a compact "V" shape structure, reducing the overall volume of the mold. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a top view of the structure of this utility model;

[0023] Figure 3This is a bottom view of the connection structure between the straight ejector rod, the inclined ejector rod, and the ejector pin and the bottom mold in this utility model;

[0024] Figure 4 This is a schematic diagram showing the disassembled structure of the straight ejector rod, the inclined ejector rod, the ejector pin, and the bottom mold in this utility model;

[0025] Figure 5 This utility model Figure 2 Enlarged schematic diagram of the structure at point A in the middle.

[0026] In the diagram: 100, bottom mold; 200, sliding cavity; 300, partition plate; 400, straight ejector rod; 500, angled ejector rod; 600, ejector pin; 201, first slide rail; 202, second slide rail; 203, third slide rail. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Example 1:

[0029] Please see Figure 1-3 The mold structure of the composite inclined top in this embodiment includes a bottom mold 100, a plurality of sliding cavities 200 are provided on the bottom mold 100, and a partition 300 is provided in the middle of the sliding cavity 200 to form a first slide 201 and a second slide 202.

[0030] It should be noted that the product is set on the bottom mold 100, and the surface of the bottom mold 100 has a positioning cavity that matches the outer contour of the product. During the mold closing and injection molding stage, the upper mold and the bottom mold 100 need to be closed to form a closed mold cavity in order to complete the mold closing and injection molding. This is a common technology in the prior art, and will not be elaborated on further in this article.

[0031] The straight push rod 400 is slidably connected in the first slide rail 201. The upper end of the straight push rod 400 is used to directly push the product. The straight push rod 400 is the main ejection unit and provides the main ejection force.

[0032] The inclined push rod 500 is slidably connected in the second slide rail 202. The inclined push rod 500 is a compound motion unit that provides both push-out force and lateral core-pulling force.

[0033] Ejector pin 600 is slidably connected to the bottom mold 100 and located on one side of the sliding cavity 200. It is used for secondary ejection of the product. Ejector pin 600 is an auxiliary ejection unit to ensure that the product is completely ejected.

[0034] During application, in the mold closing and injection stage, the upper mold and the bottom mold 100 close to form a sealed mold cavity. Molten plastic is injected into the mold cavity. The tops of the straight ejector rod 400, the angled ejector rod 500, and the ejector pin 600 remain in contact with the bottom surface of the product. The straight ejector rod 400 and the angled ejector rod 500 move upward. The angled ejector rod 500 moves along the inclined second slide 202, generating a vertical ejection force and a horizontal core-pulling force. Through this combined movement, the undercut part of the product is completely separated from the connection with the bottom mold 100. The straight ejector rod 400 rises synchronously along the vertical first slide 201 to maintain the bottom support of the product. When the angled ejector rod 500 completes the lateral core-pulling, it stops moving. The ejector pin 600 continues to rise from the third slide 203. The top of the ejector pin 600 contacts the product and completely pushes the product away from the straight ejector rod 400, completing the final separation of the product from the mold.

[0035] Example 2:

[0036] Please see Figure 2-5 In this embodiment, the first slide 201 is a vertically arranged cavity, and the bottom of the second slide 202 extends inclinedly towards the first slide 201. The first slide 201 and the second slide 202 are arranged opposite to each other.

[0037] The inclined slide layout creates a compact "V" shape between the first slide 201 and the second slide 202, reducing the overall volume of the mold.

[0038] The bottom mold 100 is also provided with a third slide 203, which is vertically set on the bottom mold 100, and the ejector pin 600 is installed in the third slide 203.

[0039] The third slide 203 is a vertically arranged cavity, and the ejector pin 600 is slidably connected in the third slide 203.

[0040] The third slide 203 is fitted with the ejector pin 600 with a clearance. The third slide 203 is set parallel to the first slide 201. The parallelism design of the third slide 203 ensures that the ejector pin 600 and the straight ejector rod 400 form a stable double-point support, effectively preventing the product from being ejected and deformed.

[0041] The tops of the straight push rod 400, the angled push rod 500, and the ejector pin 600 are all located on the same horizontal plane, and the tops of the straight push rod 400, the angled push rod 500, and the ejector pin 600 all abut against the bottom of the product.

[0042] The side wall of the sliding cavity 200 is provided with a snap-fit ​​groove, which is located on the movement path of the inclined push rod 500 and is used for the inverted snap-fit ​​structure of the product.

[0043] It should be noted that the side wall of the sliding cavity 200 is provided with a snap-fit ​​groove specifically for the undercut structure of the molded product. The snap-fit ​​groove is precisely matched with the movement trajectory of the inclined ejector rod 500 to ensure that the undercut part can be smoothly formed and demolded.

[0044] Specifically, during the injection molding process, the molten plastic completely fills the snap-fit ​​groove to form the undercut structure required for the product. During demolding, the inclined ejector rod 500 moves along a predetermined trajectory, and its front end gradually separates from the snap-fit ​​groove. For every 1mm vertical rise of the inclined ejector rod 500, a 0.2mm lateral displacement is generated. This composite motion achieves the non-destructive demolding of the undercut structure.

[0045] A drive mechanism is provided below the bottom mold 100. The drive mechanism is connected to the straight ejector rod 400, the inclined ejector rod 500 and the ejector pin 600, and is used to control the linkage action of the three.

[0046] It should be added that the driving mechanism in this application is a hydraulic drive system. The hydraulic drive system is a common device or structure in the field of mold technology. It can drive the straight ejector 400, the inclined ejector 500 and the ejector pin 600 to make up-down linear movements. At the same time, the working principle and usage of the hydraulic drive system are well known to those skilled in the art of mold technology, and will not be described in detail in this application.

[0047] The cross-sectional shape of the straight push rod 400 and the angled push rod 500 is rectangular, while the cross-sectional shape of the push pin 600 is circular.

[0048] Furthermore, the surface contact design of the straight ejector 400 and the angled ejector 500 ensures a contact area of ​​over 85%, keeping the pressure per unit area below 15MPa, while the line contact characteristics of the circular ejector pin 600 effectively reduce frictional resistance.

[0049] The tops of the straight ejector rod 400 and the angled ejector rod 500 contact the bottom surface of the product. During demolding, the angled ejector rod 500 first moves upward along the second slide 202 to complete the lateral core pulling, and then the straight ejector rod 400 moves upward in the first slide 201 to hold the product.

[0050] In application, after the molten plastic is injected into the mold cavity, the molten plastic fills the snap-fit ​​groove on the side wall of the sliding cavity 200, forming an undercut structure of the product. The tops of the straight ejector rod 400, the angled ejector rod 500, and the ejector pin 600 remain in contact with the bottom surface of the product. The drive mechanism simultaneously pushes the straight ejector rod 400 and the angled ejector rod 500 upward. The angled ejector rod 500 moves along the inclined second slide 202, causing the undercut part of the product to completely disengage from the snap-fit ​​groove. The straight ejector rod 400 rises synchronously along the vertical first slide 201, maintaining the bottom support of the product. When the angled ejector rod 500 completes the lateral core pulling, it stops moving. The ejector pin 600 continues to rise from the third slide 203. The top of the ejector pin 600 contacts the product and completely pushes the product away from the straight ejector rod 400. At this point, the final separation of the product from the mold is completed.

[0051] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0052] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A mold structure of a compound inclined top, characterized by: Includes a bottom mold (100), on which a plurality of sliding cavities (200) are provided, and a partition (300) is provided in the middle of each sliding cavity (200) to form a first slide (201) and a second slide (202); A straight push rod (400) is slidably connected in the first slide rail (201) and the upper end of the straight push rod (400) is used to directly support the product; An inclined push rod (500) is slidably connected to the second slide rail (202) in the upper and lower parts; Ejector pin (600) is slidably connected to the bottom mold (100) and located on one side of the sliding cavity (200) for secondary ejection of products.

2. A mold structure for a compound inclined stripping according to claim 1, wherein: The first slide (201) is a vertically arranged cavity, and the bottom of the second slide (202) extends inclined towards the first slide (201). The first slide (201) and the second slide (202) are arranged opposite to each other.

3. The mold structure of claim 1, wherein: The bottom mold (100) is also provided with a third slide (203), which is vertically arranged on the bottom mold (100), and the ejector pin (600) is installed in the third slide (203).

4. A mold structure for a compound inclined stripping according to claim 3, wherein: The third slide (203) is a vertically arranged cavity, and the ejector pin (600) is slidably connected in the third slide (203).

5. The mold structure of claim 3, wherein: The third slide (203) is fitted with the ejector pin (600) with a clearance, and the third slide (203) is arranged parallel to the first slide (201).

6. The mold structure of claim 1, wherein: The tops of the straight push rod (400), the angled push rod (500), and the ejector pin (600) are all located on the same horizontal plane, and the tops of the straight push rod (400), the angled push rod (500), and the ejector pin (600) all abut against the bottom of the product.

7. The mold structure of claim 1, wherein: The sliding cavity (200) has a snap-fit ​​groove on its side wall. The snap-fit ​​groove is located on the movement path of the inclined push rod (500) and is used to form the inverted structure of the product.

8. The mold structure of claim 1, wherein: A driving mechanism is provided below the bottom mold (100). The driving mechanism is connected to the straight ejector rod (400), the inclined ejector rod (500) and the ejector pin (600) and is used to control the linkage action of the three.

9. The composite inclined top mold structure according to claim 1, characterized in that: The cross-sectional shape of the straight push rod (400) and the inclined push rod (500) is rectangular, and the cross-sectional shape of the push pin (600) is circular.

10. The mold structure of claim 1, wherein: The tops of the straight push rod (400) and the angled push rod (500) contact the bottom surface of the product. During demolding, the angled push rod (500) first moves upward along the second slide (202) to complete the lateral core pulling, and then the straight push rod (400) moves upward in the first slide (201) to hold the product.

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