High-precision case frame mold

Abstract

The utility model discloses a high-precision case frame mold. The high-precision case frame mold comprises a front mold assembly, a rear mold assembly and a first side core-pulling mechanism, an elastic limiting piece is arranged on the rear mold plate; the first side core-pulling mechanism comprises an air cylinder, a connecting block, a first sliding block and a second sliding block; the air cylinder is arranged on the rear mold plate, and the driving end of the air cylinder is connected with the connecting block; the connecting block is connected with the first sliding block, and an extrusion rod is arranged on the connecting block; the first sliding block is arranged in the second sliding block in a sliding and penetrating mode, a first limiting groove is formed in the side wall of the first sliding block, the first limiting groove is in a long strip shape, and the first limiting groove extends in the sliding direction of the first sliding block; the second sliding block is arranged on the rear mold plate in a sliding mode, a first limiting column is arranged on the inner wall of the second sliding block, the first limiting column extends into the first limiting groove, a second limiting groove is formed in the bottom of the second sliding block, and the elastic limiting piece extends into the second limiting groove.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to a high-precision chassis frame mold. Background Art

[0002] Molds are various molds and tools used in industrial production to produce the desired products through methods such as injection molding, blow molding, extrusion, die casting or forging, smelting, and stamping. Injection molds usually consist of a front mold and a back mold. When the front and back molds are fastened together, molten material is injected into the mold cavity through the gate. When the mold is opened, the front and back molds separate to allow the plastic product to be removed.

[0003] A digital video converter box (Set Top Box), abbreviated as STB, commonly known as a set-top box or set-top box, is a device that connects a television set to an external signal source.

[0004] A chassis frame for a set-top box is used to install the motherboard of the set-top box. Since the chassis frame is rectangular and multiple side edges of the frame are provided with protrusions, grooves and hole-shaped structures, a side core-pulling mechanism is usually provided on the mold to facilitate product demolding. However, some side core-pulling mechanisms in the prior art have poor precision when moving. Since the contact area between the core and the molded product is large, if the entire mold is demolded at one time, it is easy to cause defects in the molded product, which is not conducive to improving product quality. Utility Model Content

[0005] In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a high-precision chassis frame mold to solve the technical problem of low precision of the side core pulling mechanism during demoulding in the prior art.

[0006] The utility model is realized by the following technical solutions: a high-precision chassis frame mold, comprising a front mold assembly, a rear mold assembly and a first-side core-pulling mechanism;

[0007] The front mold assembly includes a front mold plate, and the front mold core is provided on the front mold plate;

[0008] The rear mold assembly includes a rear mold plate, and the rear mold plate is provided with an elastic limiter and a rear mold core corresponding to the front mold core;

[0009] The first side core pulling mechanism includes a cylinder, a connecting block, a first slider and a second slider;

[0010] The cylinder is arranged on the rear template, and the driving end of the cylinder is connected to the connecting block;

[0011] The connecting block is connected to the first sliding block, and an extrusion rod is provided on the connecting block;

[0012] The first slider is slidably disposed in the second slider, and a first limiting groove is provided on the side wall of the first slider. The first limiting groove is in the shape of an elongated strip and extends along the sliding direction of the first slider.

[0013] The second slider is slidably disposed on the rear template, a first limiting post is provided on the inner wall of the second slider, the first limiting post extends into the first limiting groove, a second limiting groove is provided at the bottom of the second slider, and the elastic limiting member extends into the second limiting groove;

[0014] When the cylinder drives the connecting block to move a certain distance, the extrusion rod contacts the elastic limiting member and squeezes the elastic limiting member to move downward.

[0015] In a possible implementation, the elastic limiting member includes a fixed block, a first limiting block and a first spring;

[0016] The fixing block is arranged on the rear template, and a through hole is provided on the fixing block;

[0017] The first limiting block is arranged in the fixing block, the upper end of the first limiting block passes through the through hole and extends into the second limiting groove, and a blind hole is provided on the first limiting block;

[0018] The first spring is arranged in the blind hole of the first limiting block, one end of the first spring abuts against the first limiting block, and the other end of the first spring abuts against the rear template.

[0019] In a possible implementation manner, a lower surface of the end portion of the extrusion rod has an extrusion protrusion, and the extrusion protrusion is used to squeeze the first limiting block.

[0020] In a possible implementation, a first inclined surface is provided on the top of the first limiting block, and second inclined surfaces are provided on opposite sides of the extrusion protrusion, and the first inclined surface corresponds to and cooperates with the second inclined surface.

[0021] In a possible embodiment, a third limiting groove is provided on the side wall of the connecting block, a second limiting block is provided on the second sliding block, and a limiting protrusion is provided on the side of the second limiting block. When the connecting block slides outward a certain distance, the limiting protrusion extends into the third limiting groove to enable the second limiting block to be engaged with the connecting block.

[0022] In a possible embodiment, a third limiting block is provided on the front template, and a fourth limiting groove is provided on the top surface of the second limiting block. After the mold is closed, the lower end of the third limiting block extends into the fourth limiting groove.

[0023] In a possible implementation manner, a fixing seat is provided on the rear template, and the cylinder is arranged on the fixing seat.

[0024] In a possible implementation, a first sensor is provided on the fixing seat, a first connecting rod is provided on the first sliding block, a first blocking ring is sleeved on the first connecting rod, and the first blocking ring is used to trigger the first sensor.

[0025] In a possible implementation, a second sensor is provided on the fixing seat, a second connecting rod is provided on the second slider, a second blocking ring is sleeved on the second connecting rod, and the second blocking ring is used to trigger the second sensor.

[0026] In a possible embodiment, a positioning groove is provided on the front template, and a positioning block is provided on the rear template. After the mold is closed, the positioning block extends into the positioning groove.

[0027] Compared with the existing technology, the beneficial effect of the present invention is that: when the first side core pulling mechanism needs to be separated from the molded product, the cylinder can first drive the first slider to slide outward, so that the first slider is separated from the molded product first. When the first slider slides a certain distance, the second slider moves with the first slider. The elastic limiter can limit the second slider to ensure that the second slider can be driven by the first slider only when needed, and the first limit column can make the first slider and the second slider clamped, so that the first slider and the second slider can be separated from the molded product one after another, which improves the movement accuracy of the first side core pulling mechanism and is beneficial to improving the production quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a structural diagram of the high-precision chassis frame mold of the utility model;

[0029] Figure 2 This is a structural diagram of the front mold assembly in the high-precision chassis frame mold of the utility model;

[0030] Figure 3 This is a schematic diagram of the structure of the high-precision chassis frame mold of the utility model after the front mold component is hidden;

[0031] Figure 4 This is a structural diagram of the rear mold assembly in the high-precision chassis frame mold of the utility model;

[0032] Figure 5 This is a structural diagram of the core-pulling mechanism on the first side of the high-precision chassis frame mold of the utility model;

[0033] Figure 6 This is an exploded schematic diagram of the first side core pulling mechanism in the high-precision chassis frame mold of the utility model;

[0034] Figure 7 This is an exploded schematic diagram from another perspective of the first side core pulling mechanism in the high-precision chassis frame mold of the present invention;

[0035] Figure 8 This is an exploded schematic diagram of the elastic limiting member in the high-precision chassis frame mold of the utility model;

[0036] Figure 9 This is a structural schematic diagram of the third slider in the high-precision chassis frame mold of the utility model.

[0037] In the picture:

[0038] 100, front mold fixing plate; 101, front mold backing plate; 102, front mold plate; 103, front mold core; 104, third limit block; 105, positioning groove;

[0039] 200, rear mold fixing plate; 201, square iron; 202, rear mold plate; 203, rear mold core; 204, fixing seat; 205, first sensor; 206, second sensor; 207, lifting plate; 208, stopper; 209, third sensor; 210, positioning block; 211, limit clamp;

[0040] 300, cylinder; 301, connecting block; 302, first slider; 303, second slider; 304, extrusion rod; 305, first limiting groove; 306, first limiting column; 307, second limiting groove; 308, extrusion protrusion; 309, second inclined surface; 310, third limiting groove; 311, second limiting block; 312, limiting protrusion; 313, fourth limiting groove; 314, first connecting rod; 315, first blocking ring; 316, second connecting rod; 317, second blocking ring;

[0041] 400, elastic limiting member; 401, fixing block; 402, first limiting block; 403, first spring; 404, first inclined surface;

[0042] 500, third slider; 501, oblique guide hole; 502, oblique guide column; 503, second limiting column; 504, second spring. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0044] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0045] In addition, the descriptions of "first", "second", etc. in this application are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0046] like Figure 1-9The high-precision chassis frame mold shown in the figure includes a front mold assembly, a rear mold assembly and a first side core pulling mechanism; the front mold assembly includes a front mold plate 102, on which a front mold core 103 is provided; the rear mold assembly includes a rear mold plate 202, on which an elastic limiter 400 and a rear mold core 203 corresponding to the front mold core 103 are provided; the first side core pulling mechanism includes a cylinder 300, a connecting block 301, a first slider 302 and a second slider 303; the cylinder 300 is arranged on the rear mold plate 202, and the driving end of the cylinder 300 is connected to the connecting block 301; the connecting block 301 is connected to the first slider 302, and the connecting block 301 is provided with an extrusion rod 304; the first slider 302 can slide through In the second slider 303, a first limiting groove 305 is provided on the side wall of the first slider 302, and the first limiting groove 305 is long and extends along the sliding direction of the first slider 302; the second slider 303 can be slidably set on the rear template 202, and a first limiting column 306 is provided on the inner wall of the second slider 303, and the first limiting column 306 extends into the first limiting groove 305. A second limiting groove 307 is provided at the bottom of the second slider 303, and the elastic limiting member 400 extends into the second limiting groove 307; when the cylinder 300 drives the connecting block 301 to move a certain distance, the extrusion rod 304 contacts the elastic limiting member 400 and squeezes the elastic limiting member 400 to move downward. It should be noted that, during demoulding, the cylinder 300 is connected to the first slider 302 through the connecting block 301 to drive the first slider 302 to slide outward. At this time, the upper end of the elastic limiting member 400 extends into the second limiting groove 307, ensuring that the second slider 303 is fixed to the rear template 202, thereby preventing the second slider 303 from being driven by the first slider 302 under the action of friction. In addition, the length of the first limiting groove 305 is equal to the sliding distance of the first slider 302 relative to the second slider 303. When the first slider 302 slides outward for a certain distance, the extrusion rod 304 slides outward under the drive of the connecting block 301 until it contacts the elastic limiting member 400, and squeezes the elastic limiting member 400 downward, so that the elastic limiting member 400 disengages from the second limiting groove 307. At this time, the first limiting column 306 contacts the inner wall of the end of the first limiting groove 305, thereby enabling the first slider 302 to be engaged with the second slider 303, and then enabling the second slider 303 to slide along with the first slider 302.

[0047] The beneficial effect of the present invention is that: when the first side core pulling mechanism needs to be separated from the molded product, the cylinder 300 can first drive the first slider 302 to slide outward, so that the first slider 302 is separated from the molded product first. After the first slider 302 slides a certain distance, the second slider 303 moves with the first slider 302. The elastic limit member 400 can limit the second slider 303 to ensure that the second slider 303 can be driven by the first slider 302 only when needed, and the first limit column 306 can enable the first slider 302 to be clamped with the second slider 303, so that the first slider 302 and the second slider 303 can be separated from the molded product one after another, thereby improving the movement accuracy of the first side core pulling mechanism and helping to improve the production quality of the product.

[0048] Please refer to Figure 8 In a possible embodiment, the elastic limit member 400 includes a fixed block 401, a first limit block 402 and a first spring 403; the fixed block 401 is arranged on the rear template 202, and a through hole is provided on the fixed block 401; the first limit block 402 is arranged in the fixed block 401, and the upper end of the first limit block 402 passes through the through hole and extends into the second limit groove 307, and a blind hole is provided on the first limit block 402; the first spring 403 is arranged in the blind hole of the first limit block 402, one end of the first spring 403 abuts the first limit block 402, and the other end of the first spring 403 abuts the rear template 202. It should be noted that the fixed block 401 is fixed to the rear template 202 by bolts, and the first limit block 402 is limited to the rear template 202 by the fixed block 401. The blind hole on the first limit block 402 can provide an installation basis for the first spring 403 and limit the first spring 403. The upper end of the first limit block 402 passes through the fixed block 401 under the elastic force of the first spring 403 and extends into the second limit groove 307 to limit the second slider 303.

[0049] Please refer to Figure 7 In one possible embodiment, the lower surface of the end of the squeezing rod 304 has a squeezing protrusion 308, which is used to squeeze the first limit block 402. It is easy to understand that the squeezing protrusion 308 is provided at the end of the squeezing rod 304 so that the middle portion of the squeezing rod 304 does not affect the first limit block 402. Only after the squeezing rod 304 slides smoothly for a distance can the squeezing protrusion 308 contact the first limit block 402 and squeeze the first limit block 402 downward, so that the first limit block 402 does not hinder the movement of the second slider 303.

[0050] Please refer to Figure 8In one possible embodiment, a first inclined surface 404 is provided on the top of the first limiting block 402, and second inclined surfaces 309 are provided on opposite sides of the extrusion protrusion 308. The first inclined surface 404 corresponds to and cooperates with the second inclined surface 309. It should be noted that the upper end of the first limiting block 402 is L-shaped, and first inclined surfaces 404 are provided on opposite sides of one side of the first limiting block 402. When the extrusion rod 304 moves outward a certain distance, the extrusion protrusion 308 contacts the first limiting block 402. At this time, the first inclined surface 404 contacts the second inclined surface 309, which acts as a transition for the first limiting block 402, allowing the first limiting block 402 to slowly move downward, thereby allowing the first limiting block 402 to be smoothly pressed downward by the extrusion rod 304.

[0051] Please refer to Figure 5 and Figure 6 In one possible embodiment, a third limiting groove 310 is provided on the side wall of the connecting block 301, and a second limiting block 311 is provided on the second slider 303. The side of the second limiting block 311 has a limiting protrusion 312. When the connecting block 301 slides outward a certain distance, the limiting protrusion 312 extends into the third limiting groove 310, so that the second limiting block 311 is engaged with the connecting block 301. It is easy to understand that by engaging the second limiting block 311 with the connecting block 301, the second slider 303 is engaged with the first slider 302, so that the second slider 303 is moved together by the first slider 302. In addition, the second limiting block 311 and the first limiting post 306 are respectively located on different sides of the second slider 303, which helps to improve the connection strength between the second slider 303 and the first slider 302, so that the second slider 303 is more smoothly driven by the first slider 302.

[0052] Please refer to Figure 2 and Figure 5 In one possible embodiment, a third limiting block 104 is provided on the front template 102, and a fourth limiting groove 313 is provided on the top surface of the second limiting block 311. After the mold is closed, the lower end of the third limiting block 104 extends into the fourth limiting groove 313. It is easy to understand that when the mold is closed, the lower end of the third limiting block 104 extends into the fourth limiting groove 313, causing the third limiting block 104 to engage with the second limiting block 311, thereby preventing the third slider 500 from accidentally sliding. The second slider 303 can only move after the front template 102 is separated from the rear template 202, which helps to improve the movement accuracy of the second slider 303.

[0053] Please refer to Figure 3In one possible embodiment, a fixing base 204 is provided on the rear template 202, and the cylinder 300 is disposed on the fixing base 204. It is easy to understand that the setting of the fixing base 204 can provide a mounting base for the cylinder 300, the first sensor 205, and the second sensor 206, and play a supporting role for the first-side core-pulling mechanism, which is conducive to improving the stability of the first-side core-pulling mechanism.

[0054] Please refer to Figure 4 and Figure 7 In one possible embodiment, a first sensor 205 is provided on the fixing base 204, a first connecting rod 314 is provided on the first slider 302, and a first blocking ring 315 is sleeved on the first connecting rod 314. The first blocking ring 315 is used to trigger the first sensor 205. It is easy to understand that the first connecting rod 314 is provided to provide a mounting base for the first blocking ring 315, and the first blocking ring 315 can be set at any position of the first connecting rod 314 as needed. When the first slider 302 moves outward a certain distance, the first blocking ring 315 triggers the first sensor 205 to prompt the worker that the second slider 303 is engaged with the first slider 302, and the second slider 303 will move together with the first slider 302.

[0055] Please refer to Figure 4 and Figure 7 In one possible embodiment, the fixing base 204 is provided with a second sensor 206, the second slider 303 is provided with a second connecting rod 316, and the second connecting rod 316 is sleeved with a second blocking ring 317, and the second blocking ring 317 is used to trigger the second sensor 206. It is easy to understand that the second connecting rod 316 is provided to provide a mounting base for the second blocking ring 317, and the second blocking ring 317 can be set at any position of the second connecting rod 316 as needed. When the second slider 303 moves outward a certain distance, the second blocking ring 317 triggers the second sensor 206, so that the second sensor 206 transmits a stop signal to the cylinder 300.

[0056] Please refer to Figure 2 and Figure 4 In one possible embodiment, a positioning groove 105 is provided on the front template 102, and a positioning block 210 is provided on the rear template 202. After the mold is closed, the positioning block 210 extends into the positioning groove 105. It is easy to understand that after the mold is closed, the positioning block 210 extends into the positioning groove 105, which can make the front template 102 and the rear template 202 more tightly connected, which is conducive to improving the accuracy and stability of the mold closing.

[0057] Please refer to Figure 2 and Figure 9It should be added that the mold further includes a second side core pulling mechanism, which includes a third slider 500 and an inclined guide post 502. The third slider 500 can be slidably arranged on the rear template 202. The third slider 500 is provided with an inclined guide hole 501. The inclined guide post 502 is arranged on the front template 102. The inclined guide post 502 extends into the inclined guide hole 501. When the front mold assembly is separated from the rear mold assembly, the inclined guide post 502 can drive the third slider 500 to slide outward. In addition, the bottom of the third slider 500 A second limiting column 503 is provided on the part, and a limiting clamp 211 is provided on the rear template 202. When the third slider 500 slides outward a certain distance, the second limiting column 503 enters the limiting clamp 211, thereby stopping the third slider 500 from sliding. A blind hole is provided at the lower end of the third slider 500, and a second spring 504 is provided in the blind hole. The second spring 504 contacts the side wall of the rear mold core 203 to buffer the movement of the third slider 500 and improve the sliding stability of the third slider 500.

[0058] Please refer to Figure 1 The front mold assembly also includes a front mold fixing plate 100 and a front mold pad 101. The front mold pad 101 is arranged on the front mold fixing plate 100, and the front mold plate 102 is arranged on the front mold pad 101. The rear mold assembly also includes a rear mold fixing plate 200, a square iron 201 and a lifting plate 207. The square iron 201 is arranged on the rear mold fixing plate 200, and the rear mold plate 202 is arranged on the square iron 201. The lifting plate 207 is arranged on the rear mold fixing plate 200 and is located between the two square irons 201. A plurality of ejector pins are provided on the lifting plate 207, and the upper ends of the ejector pins are passed through the rear mold plate 202 and the rear mold core 203. When the molded product needs to be ejected, the lifting plate 207 rises under the drive of an external driving member, and drives the ejector pin to rise, and the molded product rises and separates from the rear mold core 203 under the action of the ejector pin; two third sensors 209 are also provided on the side wall of the square iron 201, and a stopper 208 for triggering the third sensor 209 is provided on the side wall of the lifting plate 207. When the lifting plate 207 is in the initial state, the stopper 208 triggers the third sensor 209 located below; when the lifting plate 207 is in the fully lifted state, the stopper 208 triggers the third sensor 209 located above. The setting of the third sensor 209 enables the mold to accurately control the moving distance of the lifting plate 207.

[0059] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. A high-precision chassis frame mold, characterized in that: It includes a front mold assembly, a rear mold assembly and a first side core pulling mechanism; The front mold assembly includes a front mold plate, and the front mold core is provided on the front mold plate; The rear mold assembly includes a rear mold plate, and the rear mold plate is provided with an elastic limiter and a rear mold core corresponding to the front mold core; The first side core pulling mechanism includes a cylinder, a connecting block, a first slider and a second slider; The cylinder is arranged on the rear template, and the driving end of the cylinder is connected to the connecting block; The connecting block is connected to the first sliding block, and an extrusion rod is provided on the connecting block; The first slider is slidably disposed in the second slider, and a first limiting groove is provided on the side wall of the first slider. The first limiting groove is in the shape of an elongated strip and extends along the sliding direction of the first slider. The second slider is slidably disposed on the rear template, a first limiting post is provided on the inner wall of the second slider, the first limiting post extends into the first limiting groove, a second limiting groove is provided at the bottom of the second slider, and the elastic limiting member extends into the second limiting groove; When the cylinder drives the connecting block to move a certain distance, the extrusion rod contacts the elastic limiting member and squeezes the elastic limiting member to move downward.

2. The high-precision chassis frame mold according to claim 1, characterized in that: The elastic limiting member includes a fixed block, a first limiting block and a first spring; The fixing block is arranged on the rear template, and a through hole is provided on the fixing block; The first limiting block is arranged in the fixing block, the upper end of the first limiting block passes through the through hole and extends into the second limiting groove, and a blind hole is provided on the first limiting block; The first spring is arranged in the blind hole of the first limiting block, one end of the first spring abuts against the first limiting block, and the other end of the first spring abuts against the rear template.

3. The high-precision chassis frame mold according to claim 2, characterized in that: The lower surface of the end of the extrusion rod is provided with an extrusion protrusion, and the extrusion protrusion is used to squeeze the first limiting block.

4. The high-precision chassis frame mold according to claim 3, characterized in that: The top of the first limiting block is provided with a first inclined surface, and the two opposite sides of the extrusion protrusion are provided with a second inclined surface, and the first inclined surface corresponds to the second inclined surface.

5. The high-precision chassis frame mold according to claim 1, characterized in that: A third limiting groove is provided on the side wall of the connecting block, a second limiting block is provided on the second sliding block, and a limiting protrusion is provided on the side of the second limiting block. When the connecting block slides outward a certain distance, the limiting protrusion extends into the third limiting groove to enable the second limiting block to be engaged with the connecting block.

6. The high-precision chassis frame mold according to claim 5, characterized in that: The front template is provided with a third limiting block, and the top surface of the second limiting block is provided with a fourth limiting groove. After the mold is closed, the lower end of the third limiting block extends into the fourth limiting groove.

7. The high-precision chassis frame mold according to claim 1, characterized in that: A fixing seat is provided on the rear template, and the cylinder is arranged on the fixing seat.

8. The high-precision chassis frame mold according to claim 7, characterized in that: The fixing seat is provided with a first sensor, the first sliding block is provided with a first connecting rod, the first connecting rod is sleeved with a first blocking ring, and the first blocking ring is used to trigger the first sensor.

9. The high-precision chassis frame mold according to claim 7, characterized in that: The fixing seat is provided with a second sensor, the second sliding block is provided with a second connecting rod, the second connecting rod is sleeved with a second blocking ring, and the second blocking ring is used to trigger the second sensor.

10. The high-precision chassis frame mold according to claim 1, characterized in that: The front template is provided with a positioning groove, and the rear template is provided with a positioning block. After the mold is closed, the positioning block extends into the positioning groove.

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