Arc-shaped core-pulling mold

Abstract

The utility model belongs to the technical field of molds, and particularly relates to an arc-shaped core-pulling mold which comprises a rear mold bottom plate and mold feet, the mold feet are fixedly installed on the upper surface of the rear mold bottom plate, a core-pulling mechanism and a mold fixing mechanism are arranged on the surfaces of the mold feet, and a jacking mechanism is arranged on the surface of the rear mold bottom plate. The core pulling mechanism comprises a rear mold frame, an oil cylinder, an oil cylinder baffle, a rear mold, a connecting rod, a wear-resisting block, a first sliding block, a second sliding block, a sliding block insert and a rear mold notch. According to the arc-shaped core-pulling mold, by arranging the core-pulling mechanism, when raw materials are injected into a mold cavity formed by the front mold and the rear mold from the sprue bush, the oil cylinder drives the connecting rod to drive the first sliding block and the second sliding block to slide, so that the sliding block insert installed on the second sliding block acts, and core pulling is completed on a formed arc-shaped part; the problem that in the background technology, parts with existing raw material forms do not have the core pulling technology is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, and particularly relates to an arc core-pulling mold. Background Technique

[0002] A mold is various dies and tools used in industrial production to obtain required products by means of injection molding, blow molding, extrusion, die casting, forging, smelting, stamping, stretching, etc. In short, a mold is a tool used to form objects. This tool is composed of various parts, and different molds are composed of different parts. It mainly realizes the processing of the external shape of objects by changing the physical state of the formed material. For products with hole features, it is necessary to design a core whose size and shape match the size and shape of the holes of the product. Core-pulling is a very important process for manufacturing products with holes, and the shapes of some holes are curved, requiring a curved core-pulling to be adapted.

[0003] At present, in the field of mold processing, the core-pulling method generally adopts the manual method. Although the manual method is convenient for taking parts, when demolding in the prior art, the products are easily damaged, the accuracy and appearance cannot be guaranteed, and the efficiency is low and the labor cost is high.

[0004] For example, as disclosed in a mold with an arc core-pulling mechanism in Chinese Patent CN207105390U, the device includes a cylinder, a mounting groove, a movable block, a workbench, a pull rod, a rocker, an arc-shaped bent pipe, and a fixed block. There is a mounting groove on the workbench, and the workbench and the mounting groove are of an integrated structure. The cylinder is arranged on the mounting groove, and the cylinder and the workbench are in clearance fit; the movable block is arranged on the right side of the cylinder, and the movable block and the workbench are in clearance fit. There is a pull rod on the movable block, and the movable block and the pull rod are in interference fit. There is an arc-shaped bent pipe on the workbench, and the workbench and the arc-shaped bent pipe cooperate with each other. There is a fixed block on the workbench, and the workbench and the fixed block are in clearance fit. There is a rocker on the fixed block. The utility model is provided with a cylinder that can use the piston rod to pull the movable block, so that the pull rod on the movable block can perform core-pulling on the arc-shaped bent pipe, ensuring that the products are not easily damaged, the accuracy and appearance are guaranteed, the efficiency is high, and the labor cost is reduced.

[0005] However, this device performs core-pulling on the formed parts and does not have a core-pulling process for parts in the raw material state.

[0006] Therefore, we propose an arc core-pulling mold to solve the above problems. Content of the Utility Model

[0007] The purpose of the utility model is to provide an arc core-pulling mold to solve the problems raised in the above background technique.

[0008] To achieve the above object, the utility model provides the following technical solution: an arc core-pulling mold, including a rear mold bottom plate and mold feet, the mold feet are fixedly installed on the upper surface of the rear mold bottom plate, a core-pulling mechanism and a fixed mold mechanism are arranged on the surface of the mold feet, and a jacking mechanism is arranged on the surface of the rear mold bottom plate.

[0009] The core-pulling mechanism includes a rear mold frame, an oil cylinder, an oil cylinder baffle, a rear mold, a connecting rod, a wear-resistant block, a first slider, a second slider, a slider insert, and a rear mold notch. The oil cylinder baffle is fixedly installed on both sides of the rear mold frame, the oil cylinder is fixedly installed on the surface of the oil cylinder baffle, a rear mold notch is opened on the surface of the rear mold frame, a rear mold is fixedly installed inside the rear mold notch, the output end of the oil cylinder is connected with a first slider, one end of the connecting rod is rotatably connected to the surface of the first slider, the other end of the connecting rod is rotatably connected to the surface of the second slider, a slider insert is fixedly installed on the surface of the second slider, the second slider is fixedly installed on the surface of the wear-resistant block, and the wear-resistant block is fixedly installed on the surface of the rear mold.

[0010] Preferably, a first pressing strip is fixedly installed inside the rear mold notch, the first pressing strips are symmetrically distributed on both sides of the first slider, a second pressing strip is fixedly installed on the surface of the rear mold, and one side of the second pressing strip is pressed against one side of the second slider. The pressing strips play a role in fixing the slider to prevent it from disengaging during the sliding process.

[0011] Preferably, the fixed mold mechanism includes a front mold panel, a front mold frame, a first front mold, a second front mold, a sprue bushing, a telescopic column, and a front mold notch. One end of the telescopic column is fixedly installed on the surface of the mold feet, the other end of the telescopic column penetrates through the front mold frame and is connected to the bottom surface of the front mold panel, the front mold frame is fixedly installed on the bottom surface of the front mold panel, a front mold notch is opened on the surface of the front mold frame, a first front mold and a second front mold are arranged inside the front mold notch, and a sprue bushing is fixedly installed on the upper surface of the front mold panel.

[0012] Preferably, the inside of the sprue bushing is hollow, the sprue bushing penetrates through to the surfaces of the first front mold and the second front mold, and the first front mold and the second front mold form a model cavity with the rear mold, which is convenient for injecting raw materials and finally forming.

[0013] Preferably, the jacking mechanism includes a thimble bottom plate, a thimble plate, and thimble columns. The thimble bottom plate is fixedly installed on the upper surface of the rear mold bottom plate, the thimble plate is fixedly installed on the upper surface of the thimble bottom plate, thimble columns penetrate through the surface of the thimble plate, one end of the thimble column is fixedly installed on the upper surface of the thimble bottom plate, and the other end of the thimble column is connected to the surface of the front mold frame, which can jack up the structure inside the front mold frame and the front mold panel and separate them from the rear mold, so as to facilitate taking away the parts.

[0014] Preferably, the second slider is arc-shaped, the opening of the second pressing strip is semi-circular, and the second slider is slidably press-connected to the second pressing strip, so that while the second slider slides, the second pressing strip can always fix it to prevent it from detaching.

[0015] Preferably, the wear-resistant block is composed of a low-carbon steel plate and an alloy wear-resistant layer, and the alloy wear-resistant layer is half of the total thickness, and has wear resistance, impact resistance, heat resistance, and corrosion resistance.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] 1. For this arc-shaped core-pulling mold, by setting a core-pulling mechanism, when the raw material is injected from the sprue bushing into the mold cavity formed by the front mold and the rear mold, the oil cylinder drives the connecting rod to drive the first slider and the second slider to slide, so that the slider insert installed on the second slider acts, thereby completing the core-pulling of the formed arc-shaped part, and solving the problem mentioned in the background technology that this device performs core-pulling on the formed parts, and does not have a core-pulling process for parts with the form of raw materials.

[0018] 2. For this arc-shaped core-pulling mold, by setting a jacking mechanism, when the core-pulling of the part is completed, the ejector pin column moves upward to separate the front mold and the rear mold, exposing the completed part, and the staff takes out the part, and the ejector pin column moves downward to close the mold, facilitating the next injection molding and core-pulling, and improving the safety of the staff when taking out the part. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the external structure of the present utility model;

[0020] Figure 2 is a schematic diagram of the structure of the core-pulling mechanism of the present utility model;

[0021] Figure 3 is a schematic diagram of the structure of the fixed mold mechanism of the present utility model;

[0022] Figure 4 is a schematic diagram of the internal structure of the present utility model.

[0023] In the figure: 101, rear mold bottom plate; 102, mold feet; 201, front mold panel; 202, front mold frame; 203, first front mold; 204, second front mold; 205, sprue bushing; 206, telescopic column; 207, rear mold frame; 208, first pressing strip; 209, second pressing strip; 210, oil cylinder; 211, oil cylinder baffle; 212, rear mold; 213, connecting rod; 214, wear-resistant block; 215, first slider; 216, second slider; 217, slider insert; 218, front mold notch; 219, rear mold notch; 301, ejector pin bottom plate; 302, ejector pin plate; 303, ejector pin column. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] Please refer to Figures 1-4 , the present invention provides a technical solution:

[0026] Embodiment 1: An arc core-pulling mold, including a rear mold bottom plate 101 and mold feet 102. The mold feet 102 are fixedly installed on the upper surface of the rear mold bottom plate 101. A core-pulling mechanism and a fixed mold mechanism are arranged on the surface of the mold feet 102, and a lifting mechanism is arranged on the surface of the rear mold bottom plate 101.

[0027] The core-pulling mechanism includes a rear mold frame 207, an oil cylinder 210, an oil cylinder baffle 211, a rear mold 212, a connecting rod 213, a wear-resistant block 214, a first slider 215, a second slider 216, a slider insert 217, and a rear mold notch 219. The oil cylinder baffle 211 is fixedly installed on both side surfaces of the rear mold frame 207. The oil cylinder 210 is fixedly installed on the surface of the oil cylinder baffle 211. A rear mold notch 219 is opened on the surface of the rear mold frame 207. The rear mold 212 is fixedly installed inside the rear mold notch 219. The output end of the oil cylinder 210 is connected to the first slider 215. One end of the connecting rod 213 is rotatably connected to the surface of the first slider 215, and the other end of the connecting rod 213 is rotatably connected to the surface of the second slider 216. The slider insert 217 is fixedly installed on the surface of the second slider 216. The second slider 216 is fixedly installed on the surface of the wear-resistant block 214. The wear-resistant block 214 is fixedly installed on the surface of the rear mold 212. The wear-resistant block 214 is composed of a low-carbon steel plate and an alloy wear-resistant layer. The alloy wear-resistant layer is half of the total thickness and has wear resistance, impact resistance, heat resistance, and corrosion resistance.

[0028] A first pressing strip 208 is fixedly installed inside the rear mold notch 219. The first pressing strips 208 are symmetrically distributed on both sides of the first slider 215. A second pressing strip 209 is fixedly installed on the surface of the rear mold 212. One side of the second pressing strip 209 is pressed against one side of the second slider 216. The second slider 216 is arc-shaped, and the opening of the second pressing strip 209 is semi-circular. The second slider 216 is slidably pressed against the second pressing strip 209, so that while the second slider 216 slides, the second pressing strip 209 can always fix it to prevent it from disengaging during the sliding process.

[0029] Embodiment 2: Based on Embodiment 1, the fixed mold mechanism includes a front mold panel 201, a front mold frame 202, a first front mold 203, a second front mold 204, a sprue bushing 205, a telescopic column 206, and a front mold notch 218. One end of the telescopic column 206 is fixedly installed on the surface of the mold foot 102, and the other end of the telescopic column 206 passes through the front mold frame 202 and is connected to the bottom surface of the front mold panel 201. The bottom surface of the front mold panel 201 is fixedly installed with a front mold frame 202. The front mold notch 218 is provided on the surface of the front mold frame 202. The first front mold 203 and the second front mold 204 are arranged inside the front mold notch 218. The sprue bushing 205 is fixedly installed on the upper surface of the front mold panel 201.

[0030] The inside of the sprue bushing 205 is hollow. The sprue bushing 205 penetrates to the surfaces of the first front mold 203 and the second front mold 204. The first front mold 203 and the second front mold 204 form a mold cavity with the rear mold 212, which is convenient for injecting raw materials and finally forming.

[0031] Embodiment 3: Based on Embodiment 1, the jacking mechanism includes a ejector pin bottom plate 301, an ejector pin plate 302, and ejector pin columns 303. The ejector pin bottom plate 301 is fixedly installed on the upper surface of the rear mold bottom plate 101. The ejector pin plate 302 is fixedly installed on the upper surface of the ejector pin bottom plate 301. The ejector pin columns 303 penetrate through the surface of the ejector pin plate 302. One end of the ejector pin column 303 is fixedly installed on the upper surface of the ejector pin bottom plate 301, and the other end of the ejector pin column 303 is connected to the surface of the front mold frame 202, which can jack up the structures inside the front mold frame 202 and the front mold panel and separate them from the rear mold 212, thus facilitating the removal of parts.

[0032] Working principle: When in use, the raw materials are injected into the mold cavity formed by the first front mold 203, the second front mold 204 and the rear mold 212 from the sprue bushing 205. The oil cylinder 210 drives the connecting rod 213 to drive the first slider 215 and the second slider 216 to slide, so that the slider insert 217 installed on the second slider 216 acts, thereby completing the core pulling of the formed arc-shaped part. When the core pulling of the part is completed, the ejector pin columns 303 move upward to separate the first front mold 203, the second front mold 204 and the rear mold 212, exposing the completed part. The staff takes out the part, and the ejector pin columns 303 move downward to close the mold, which is convenient for the next injection molding and core pulling.

[0033] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising said element.

Claims

1. An arc-shaped core-pulling mold, comprising a rear mold bottom plate (101) and mold feet (102), wherein the mold feet (102) are fixedly installed on the upper surface of the rear mold bottom plate (101), and are characterized in that: The surface of the mold feet (102) is provided with a core-pulling mechanism and a fixed mold mechanism, and the surface of the rear mold bottom plate (101) is provided with a jacking mechanism; The core-pulling mechanism includes a rear mold frame (207), an oil cylinder (210), an oil cylinder baffle (211), a rear mold (212), a connecting rod (213), a wear-resistant block (214), a first slider (215), a second slider (216), a slider insert (217), and a rear mold notch (219). The oil cylinder baffle (211) is fixedly installed on both side surfaces of the rear mold frame (207), the oil cylinder (210) is fixedly installed on the surface of the oil cylinder baffle (211), a rear mold notch (219) is formed on the surface of the rear mold frame (207), the rear mold (212) is fixedly installed inside the rear mold notch (219), the output end of the oil cylinder (210) is connected to the first slider (215), one end of the connecting rod (213) is rotatably connected to the surface of the first slider (215), the other end of the connecting rod (213) is rotatably connected to the surface of the second slider (216), the slider insert (217) is fixedly installed on the surface of the second slider (216), the second slider (216) is fixedly installed on the surface of the wear-resistant block (214), and the wear-resistant block (214) is fixedly installed on the surface of the rear mold (212).

2. The arc core-pulling mold according to claim 1, characterized in that: A first pressing strip (208) is fixedly installed inside the rear mold notch (219), the first pressing strip (208) is symmetrically distributed on both sides of the first slider (215), a second pressing strip (209) is fixedly installed on the surface of the rear mold (212), and one side of the second pressing strip (209) is press-connected to one side of the second slider (216).

3. An arc-shaped core-pulling mold according to claim 1, characterized in that: The fixed mold mechanism includes a front mold panel (201), a front mold frame (202), a first front mold (203), a second front mold (204), a sprue bushing (205), a telescopic column (206), and a front mold notch (218). One end of the telescopic column (206) is fixedly installed on the surface of the mold feet (102), the other end of the telescopic column (206) passes through the front mold frame (202) and is connected to the bottom surface of the front mold panel (201), the front mold frame (202) is fixedly installed on the bottom surface of the front mold panel (201), a front mold notch (218) is formed on the surface of the front mold frame (202), the first front mold (203) and the second front mold (204) are arranged inside the front mold notch (218), and the sprue bushing (205) is fixedly installed on the upper surface of the front mold panel (201).

4. The arc core-pulling mold according to claim 3, characterized in that: The inside of the sprue bushing (205) is hollow, the sprue bushing (205) penetrates through to the surfaces of the first front mold (203) and the second front mold (204), and the first front mold (203) and the second front mold (204) and the rear mold (212) form a model cavity.

5. An arc-shaped core-pulling mold according to claim 1, characterized in that: The jacking mechanism includes a thimble bottom plate (301), a thimble plate (302), and thimble columns (303). The thimble bottom plate (301) is fixedly installed on the upper surface of the rear mold bottom plate (101). The thimble plate (302) is fixedly installed on the upper surface of the thimble bottom plate (301). The thimble columns (303) penetrate through the surface of the thimble plate (302). One end of the thimble column (303) is fixedly installed on the upper surface of the thimble bottom plate (301), and the other end of the thimble column (303) is connected to the surface of the front mold frame (202).

6. The arc core-pulling mold according to claim 2, characterized in that: The second slider (216) is arc-shaped, the opening of the second pressure strip (209) is semi-circular, and the second slider (216) is slidably press-connected to the second pressure strip (209).

7. An arc core-pulling mold according to claim 1, wherein: The wear-resistant block (214) is composed of a low-carbon steel plate and an alloy wear-resistant layer, and the alloy wear-resistant layer is half of the total thickness.

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