Die convenient for side ejection

Abstract

The utility model discloses a mould convenient for lateral ejection, which comprises a lower mould, an upper mould, a core-pulling component and a core-pulling ejection mechanism, the core-pulling component and the core-pulling ejection mechanism are arranged on the upper mould, the core-pulling component comprises a support, a sliding core block and an oil cylinder, the support is arranged on one side of the upper mould, the oil cylinder is arranged on the support, and the sliding core block is arranged on the support. The oil cylinder drives the sliding core block to be close to or far away from the upper die, the core-pulling ejection mechanism is arranged on the support and comprises a positioning block, an ejector pin and a bolt, the ejector pin is arranged on the positioning block, the positioning block is fixed on the support through the bolt, and the sliding core block is fixed on the support through the bolt. The sliding core block is provided with an ejector pin hole allowing the ejector pin to penetrate through, and the ejector pin is used for abutting against a long and thin part corresponding to a sand core. According to the utility model, the slender part of the sand core can be prevented from being snapped, and the yield of the sand core is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to a mold that is convenient for side ejection. Background Art

[0002] The horizontal parting sand core shooting machine is a kind of equipment used in the foundry industry. It is mainly used to make cores in castings of various complex shapes.

[0003] The ejection method of the mold used to make sand cores is generally upper and lower mold ejection. The four-side sliding core blocks cannot be arranged with an ejection mechanism. As a result, some slender parts with complex shapes and formed by sliding core blocks are easily broken when the sliding core blocks are opened, resulting in high sand core defect rate and low production efficiency. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a mold that is convenient for side ejection, which can prevent the slender part of the sand core from being pulled off and improve the yield rate of the sand core.

[0005] According to the first aspect of the utility model, a mold convenient for side ejection comprises a lower mold, an upper mold, a core pulling assembly and a core pulling ejection mechanism arranged on the upper mold, the core pulling assembly comprises a bracket, a sliding core block and a cylinder, the bracket is arranged on one side of the upper mold, the cylinder is installed on the bracket, the cylinder drives the sliding core block to approach or move away from the upper mold, the core pulling ejection mechanism is arranged on the bracket, the core pulling ejection mechanism comprises a positioning block, an ejector pin and a bolt, the ejector pin is arranged on the positioning block, the positioning block is fixed to the bracket by the bolt, the sliding core block is provided with an ejector pin hole for accommodating the ejector pin to pass through, and the ejector pin is used to tighten the slender part corresponding to the sand core.

[0006] A mold that facilitates side ejection according to an embodiment of the utility model has at least the following beneficial effects:

[0007] The utility model is provided with a core-pulling and ejecting mechanism. After the sand core is formed, the oil cylinder drives the sliding core block to be pulled out, the ejector pin is fixed, the forming surface of the sliding core block is separated from the sand core, and one end of the ejector pin abuts against the slender part corresponding to the sand core, thereby preventing the slender part of the sand core from being pulled off and improving the yield rate of the sand core.

[0008] According to some embodiments of the present utility model, the ejection mechanism further includes a limit spring, the limit spring is sleeved on the outer circumference of the bolt, and two ends of the limit spring are respectively in contact with the bracket and the positioning block.

[0009] Advantageously, a limit spring is provided, which is sleeved around the outer periphery of the bolt. After the bolt is tightened, the bracket and the positioning block are respectively subjected to elastic forces at both ends of the limit spring, thereby preventing the bolt from loosening and keeping the ejector pin at a set position.

[0010] According to some embodiments of the utility model, two of the bolts and the limit springs are provided, and the two bolts and the two limit springs are symmetrically arranged along the center of the positioning block.

[0011] Advantageously, by providing two screws and two limit springs, the positioning block can be evenly stressed, making it easy to adjust the parallelism of the positioning block, thereby ensuring that the extension angle of the ejector pin is stable.

[0012] According to some embodiments of the present invention, a groove is provided on one side of the positioning block, and the groove accommodates one end of the limit spring.

[0013] Advantageously, by providing the groove, the groove can accommodate one end of the limit spring, thereby enabling the limit spring to be limited.

[0014] According to some embodiments of the utility model, a needle is provided at one end of the ejector pin, and a countersunk hole is provided at the positioning block. After the ejector pin passes through the positioning block, the needle is placed in the countersunk hole, and one end of the needle is connected to the positioning block via a fastener.

[0015] Advantageously, by providing the needle and the countersunk hole, after the ejector pin passes through the positioning block, the needle is placed in the countersunk hole, and then the needle is locked to the positioning block by a fastener, thereby facilitating the disassembly and assembly of the ejector pin.

[0016] According to some embodiments of the present invention, the cross section of the needle is D-shaped, and the countersunk hole cooperates with the needle.

[0017] Advantageously, by making the cross section of the needle into a D-shape, the countersunk hole can clamp the D-shaped needle, thereby preventing the ejector pin from rotating during production.

[0018] According to some embodiments of the present utility model, the ejector pin and the ejector pin hole are clearance-matched.

[0019] Advantageously, by making the ejector pin and the ejector pin hole have clearance fit, the relative movement between the ejector pin and the ejector pin hole can be ensured to be smooth, thereby preventing the ejector pin from being stuck in the sliding core block.

[0020] According to some embodiments of the present utility model, a plurality of ejector pins are provided.

[0021] Advantageously, a plurality of ejectors are provided to respectively push down the corresponding elongated parts of the sand core, thereby meeting the production of sand cores of different specifications and shapes.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0024] Figure 1 This is a schematic structural diagram of a mold that is convenient for side ejection according to an embodiment of the utility model;

[0025] Figure 2 for Figure 1 Exploded diagram of

[0026] Figure 3 for Figure 1 A cross-sectional view of the core pulling assembly and the core pulling ejection mechanism;

[0027] Figure 4 for Figure 3 An enlarged view of the core-pulling ejection mechanism;

[0028] Figure 5 for Figure 4 Schematic diagram of the structure of the positioning block and ejector from another angle.

[0029] Figure numerals: 100 - lower mold, 110 - upper mold, 120 - core pulling assembly, 130 - core pulling ejection mechanism, 140 - bracket, 150 - sliding core block, 160 - cylinder, 170 - positioning block, 180 - ejector pin, 190 - bolt, 200 - ejector pin hole, 210 - limit spring, 220 - groove, 230 - needle head, 240 - countersunk hole, 250 - fastener. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0031] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] A mold that facilitates side ejection according to an embodiment of the utility model is described below in conjunction with the accompanying drawings.

[0035] Reference Figures 1 to 5 A mold for side ejection according to an embodiment of the utility model comprises a lower mold 100, an upper mold 110, a core pulling assembly 120 and a core pulling ejection mechanism 130 arranged on the upper mold 110, the core pulling assembly 120 comprises a bracket 140, a sliding core block 150 and a cylinder 160, the bracket 140 is arranged on one side of the upper mold 110, the cylinder 160 is installed on the bracket 140, the cylinder 160 drives the sliding core block 150 to approach or move away from the upper mold 110, the core pulling ejection mechanism 130 is arranged on the bracket 140, the core pulling ejection mechanism 130 comprises a positioning block 170, an ejector pin 180 and a bolt 190, the ejector pin 180 is arranged on the positioning block 170, the positioning block 170 is fixed to the bracket 140 by the bolt 190, the sliding core block 150 is provided with an ejector pin hole 200 for accommodating the ejector pin 180 to pass through, and the ejector pin 180 is used to tighten the slender part corresponding to the sand core.

[0036] Specifically, after the sand core is formed, the oil cylinder 160 drives the sliding core block 150 to be pulled out, the ejector pin 180 is fixed, the molding surface of the sliding core block 150 is separated from the sand core, and one end of the ejector pin 180 abuts against the slender part corresponding to the sand core, thereby preventing the slender part of the sand core from being pulled apart and improving the yield rate of the sand core.

[0037] In some preferred embodiments, the ejection mechanism further includes a limit spring 210 , which is sleeved on the outer circumference of the bolt 190 , and two ends of the limit spring 210 are respectively in contact with the bracket 140 and the positioning block 170 .

[0038] It is understandable that by providing a limit spring 210, the limit spring 210 is sleeved on the outer periphery of the bolt 190. After the bolt 190 is tightened, the bracket 140 and the positioning block 170 are respectively subjected to the elastic force at both ends of the limit spring 210, thereby preventing the bolt 190 from loosening and allowing the ejector pin 180 to always maintain the set position.

[0039] In some preferred embodiments, two bolts 190 and two limit springs 210 are provided, and the two bolts 190 and the two limit springs 210 are symmetrically arranged along the center of the positioning block 170 .

[0040] It is understandable that by providing two screws and two limit springs 210 , the positioning block 170 can be evenly stressed, which facilitates adjustment of the parallelism of the positioning block 170 , thereby ensuring that the extension angle of the ejector pin 180 is stable.

[0041] In some preferred embodiments, a groove 220 is provided on one side of the positioning block 170 , and the groove 220 accommodates one end of the limit spring 210 .

[0042] It is understandable that, by providing the groove 220 , the groove 220 can accommodate one end of the limit spring 210 , thereby enabling the limit spring 210 to be limited.

[0043] In some preferred embodiments, a needle 230 is provided at one end of the ejector pin 180, and a countersunk hole 240 is provided at the positioning block 170. After the ejector pin 180 passes through the positioning block 170, the needle 230 is placed in the countersunk hole 240, and one end of the needle 230 is connected to the positioning block 170 via a fastener 250.

[0044] It is understandable that by providing the needle 230 and the countersunk hole 240 , after the ejector pin 180 passes through the positioning block 170 , the needle 230 is placed in the countersunk hole 240 , and then the needle 230 is locked to the positioning block 170 by the fastener 250 , thereby facilitating the disassembly and assembly of the ejector pin 180 .

[0045] It should be noted that the fastener 250 is a screw plug.

[0046] In some preferred embodiments, the cross section of the needle 230 is D-shaped, and the counterbore 240 cooperates with the needle 230 .

[0047] It can be understood that by making the cross section of the needle 230 D-shaped, the counterbore 240 can clamp the D-shaped needle 230, thereby preventing the ejector pin 180 from rotating during production.

[0048] In some preferred embodiments, the ejector pin 180 and the ejector pin hole 200 are clearance-matched.

[0049] It is understandable that by making the ejector pin 180 and the ejector pin hole 200 have clearance fit, it is possible to ensure smooth relative movement between the ejector pin 180 and the ejector pin hole 200 , thereby preventing the ejector pin 180 from being stuck in the sliding core block 150 .

[0050] In some preferred embodiments, a plurality of ejector pins 180 are provided.

[0051] It can be understood that by providing a plurality of ejector pins 180 , the plurality of ejector pins 180 respectively push the corresponding elongated parts of the sand core, thereby meeting the production of sand cores of different specifications and shapes.

[0052] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0053] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A mold that facilitates side ejection, characterized in that: The invention comprises a lower mold (100), an upper mold (110), a core pulling assembly (120) arranged on the upper mold (110), and a core pulling ejection mechanism (130); the core pulling assembly (120) comprises a bracket (140), a sliding core block (150) and an oil cylinder (160); the bracket (140) is arranged on one side of the upper mold (110); the oil cylinder (160) is installed on the bracket (140); the oil cylinder (160) drives the sliding core block (150) to move closer to or away from the upper mold (110); The core ejection mechanism (130) is arranged on the bracket (140), and the core ejection mechanism (130) comprises a positioning block (170), an ejector pin (180) and a bolt (190). The ejector pin (180) is arranged on the positioning block (170), and the positioning block (170) is fixed to the bracket (140) by the bolt (190). The sliding core block (150) is provided with an ejector pin hole (200) for accommodating the ejector pin (180) to pass through, and the ejector pin (180) is used to tighten the slender part corresponding to the sand core.

2. A mold for facilitating side ejection according to claim 1, characterized in that: The ejection mechanism further comprises a limit spring (210), wherein the limit spring (210) is sleeved on the outer circumference of the bolt (190), and two ends of the limit spring (210) are respectively in contact with the bracket (140) and the positioning block (170).

3. A mold for facilitating side ejection according to claim 2, characterized in that: Two of the bolts (190) and the limit springs (210) are provided, and the two bolts (190) and the two limit springs (210) are symmetrically arranged along the center of the positioning block (170).

4. A mold for facilitating side ejection according to claim 2, characterized in that: A groove (220) is provided on one side of the positioning block (170), and the groove (220) accommodates one end of the limit spring (210).

5. A mold for facilitating side ejection according to claim 1, characterized in that: A needle head (230) is provided at one end of the ejector pin (180), and a countersunk hole (240) is provided on the positioning block (170). After the ejector pin (180) passes through the positioning block (170), the needle head (230) is placed in the countersunk hole (240), and one end of the needle head (230) is connected to the positioning block (170) via a fastener (250).

6. A mold for facilitating side ejection according to claim 5, characterized in that: The cross section of the needle (230) is D-shaped, and the countersunk hole (240) cooperates with the needle (230).

7. A mold for facilitating side ejection according to claim 1, characterized in that: The ejector pin (180) is clearance-matched with the ejector pin hole (200).

8. A mold for facilitating side ejection according to claim 1, characterized in that: A plurality of ejector pins (180) are provided.

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