High-precision set top box case frame mold

Abstract

The utility model discloses a high-precision set top box case frame mold. The high-precision set top box case frame mold comprises a front mold assembly, a rear mold assembly and a first side core-pulling mechanism, a first limiting groove is further formed in the rear mold plate; the first side core-pulling mechanism comprises an air cylinder, 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 first sliding block; the first sliding block is arranged in the second sliding block in a sliding and penetrating mode, and a second limiting groove is formed in the bottom wall of the first sliding block. The second sliding block is of a hollow structure, an elastic limiting piece is arranged on the bottom wall of the second sliding block and penetrates through the bottom wall of the second sliding block, in the mold closing state, the lower end of the elastic limiting piece stretches into the first limiting groove, the upper end of the elastic limiting piece abuts against the bottom wall of the first sliding block, and the lower end of the elastic limiting piece abuts against the bottom wall of the second sliding block. After the first sliding block slides outwards by a certain distance, the upper end of the elastic limiting piece extends into the second limiting groove, and the lower end of the elastic limiting piece is separated from the first limiting groove.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to a high-precision set-top box 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 set-top box 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 set-top box 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, the rear mold plate is provided with a rear mold core corresponding to the front mold core, and the rear mold plate is also provided with a first limiting groove;

[0009] The first side core pulling mechanism includes a cylinder, 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 first slider;

[0011] The first slider is slidably arranged in the second slider, and a second limiting groove is provided on the bottom wall of the first slider;

[0012] The second slider is a hollow structure, and an elastic limiter is provided on the bottom wall of the second slider, and the elastic limiter passes through the bottom wall of the second slider. In the mold closing state, the lower end of the elastic limiter extends into the first limiter groove, and the upper end of the elastic limiter contacts the bottom wall of the first slider. When the first slider slides outward a certain distance, the upper end of the elastic limiter extends into the second limiter groove, and the lower end of the elastic limiter disengages from the first limiter groove.

[0013] In a possible implementation, the elastic limiting member includes a fixing block, a limiting block and a first spring;

[0014] The fixing block is arranged on the bottom wall of the second sliding block, and a through hole is provided on the fixing block;

[0015] The limiting block is arranged in the fixing block, the lower end of the limiting block passes through the through hole and extends into the first limiting groove, and a blind hole is provided on the limiting block;

[0016] The first spring is arranged in the blind hole of the limiting block, one end of the first spring abuts against the limiting block, and the other end of the first spring abuts against the fixing block.

[0017] In a possible implementation, the top surface of the limiting block is a curved surface.

[0018] In a possible implementation manner, a fixing seat is provided on the rear template, and the cylinder is arranged on the fixing seat.

[0019] 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.

[0020] 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.

[0021] 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.

[0022] In a possible embodiment, the rear mold assembly further includes a rear mold fixing plate, square irons, and a lifting plate;

[0023] There are two square irons, which are respectively arranged on both sides of the rear mold fixing plate;

[0024] The lifting plate can be movably arranged on the rear mold fixing plate and is located between the two square irons.

[0025] In a possible implementation, a stopper is provided on the side wall of the lifting plate, and a third sensor is provided on the side wall of the square iron, and the stopper is used to trigger the third sensor.

[0026] In a possible embodiment, a receiving groove is provided on the front template, and the front mold core is located in the middle of the bottom of the receiving groove. After the mold is closed, the first side core pulling mechanism extends into the receiving 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 play a two-way limiting role, ensuring that the second slider can be driven by the first slider only when needed, so that the first slider and the second slider 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. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0030] Figure 3 This is a structural diagram of the high-precision set-top box 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 set-top box chassis frame mold of the utility model;

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

[0034] Figure 7 This is a structural diagram of the cylinder and the first slider in the high-precision set-top box chassis frame mold of the utility model;

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

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

[0037] In the picture:

[0038] 100, front mold fixing plate; 101, front mold pad; 102, front mold plate; 103, receiving groove; 104, front mold core; 105, positioning groove;

[0039] 200, rear mold fixing plate; 201, square iron; 202, rear mold plate; 203, rear mold core; 204, first limiting groove; 205, fixing seat; 206, first sensor; 207, second sensor; 208, lifting plate; 209, stopper; 210, third sensor; 211, positioning block; 212, limiting clamp;

[0040] 300, cylinder; 301, first slider; 302, second slider; 303, second limiting groove; 304, first connecting rod; 305, first blocking ring; 306, second connecting rod; 307, second blocking ring;

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

[0042] 500, third slider; 501, oblique guide hole; 502, oblique guide column; 503, limit 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 technical features indicated. 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 1-9 The high-precision set-top box 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 104 is provided; the rear mold assembly includes a rear mold plate 202, on which a rear mold core 203 corresponding to the front mold core 104 is provided, and the rear mold plate 202 is also provided with a first limiting groove 204; the first side core pulling mechanism includes a cylinder 300, a first slider 301 and a second slider 302; the cylinder 300 is arranged on the rear mold plate 202, and the driving end of the cylinder 300 is connected to the first slider 301; the first slider 301 can be slidably inserted into Inside the second slider 302, a second limiting groove 303 is provided on the bottom wall of the first slider 301; the second slider 302 is a hollow structure, and an elastic limiting member 400 is provided on the bottom wall of the second slider 302, and the elastic limiting member 400 passes through the bottom wall of the second slider 302. When the mold is closed, the lower end of the elastic limiting member 400 extends into the first limiting groove 204, and the upper end of the elastic limiting member 400 contacts the bottom wall of the first slider 301. When the first slider 301 slides outward a certain distance, the upper end of the elastic limiting member 400 extends into the second limiting groove 303, and the lower end of the elastic limiting member 400 disengages from the first limiting groove 204. When the first slider 301 is moved outwards, the second limiting groove 303 is moved to the upper position of the first limiting groove 303 and the lower position of the first limiting groove 303 is disengaged from the first limiting groove 204, so that the second slider 302 is engaged with the first slider 301 under the action of the elastic limiting member 400, thereby enabling the second slider 302 to slide along with the first slider 301.

[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 301 to slide outward, so that the first slider 301 is separated from the molded product first. After the first slider 301 slides a certain distance, the second slider 302 moves with the first slider 301. The elastic limit member 400 can play a two-way limiting role, ensuring that the second slider 302 can be driven by the first slider 301 only when needed, so that the first slider 301 and the second slider 302 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 limit block 402 and a first spring 403; the fixed block 401 is arranged on the bottom wall of the second slider 302, and a through hole is provided on the fixed block 401; the limit block 402 is arranged in the fixed block 401, and the lower end of the limit block 402 passes through the through hole and extends into the first limit groove 204, and a blind hole is provided on the limit block 402; the first spring 403 is arranged in the blind hole of the limit block 402, one end of the first spring 403 abuts the limit block 402, and the other end of the first spring 403 abuts the fixed block 401. It should be noted that the fixing block 401 is installed on the second slider 302 by bolts, and there are two first springs 403, which are respectively arranged on both sides of the limit block 402. The blind hole on the limit block 402 can limit the first spring 403 and provide an installation basis for the first spring 403. The limit block 402 contacts the bottom wall of the first slider 301 under the elastic force of the first spring 403.

[0049] Please refer to Figure 8 In one possible embodiment, the top surface of the limit block 402 is an arc surface. It is easy to understand that the arc surface of the top surface of the limit block 402 can make the top of the limit block 402 rounded, which is beneficial to reducing the friction between the limit block 402 and the first slider 301 and reducing wear.

[0050] Please refer to Figure 3 In one possible embodiment, a fixing base 205 is provided on the rear template 202, and the cylinder 300 is disposed on the fixing base 205. It is easy to understand that the setting of the fixing base 205 can provide a mounting base for the cylinder 300, the first sensor 206, and the second sensor 207, 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.

[0051] Please refer to Figure 4 and Figure 5In one possible embodiment, a first sensor 206 is provided on the fixing base 205, a first connecting rod 304 is provided on the first slider 301, and a first blocking ring 305 is sleeved on the first connecting rod 304. The first blocking ring 305 is used to trigger the first sensor 206. It is easy to understand that the first connecting rod 304 is provided to provide a mounting base for the first blocking ring 305, and the first blocking ring 305 can be set at any position of the first connecting rod 304 as needed. When the first slider 301 moves outward a certain distance, the first blocking ring 305 triggers the first sensor 206 to prompt the worker that the second slider 302 is engaged with the first slider 301, and the second slider 302 will move together with the first slider 301.

[0052] Please refer to Figure 4 and Figure 5 In one possible embodiment, a second sensor 207 is provided on the fixing base 205, a second connecting rod 306 is provided on the second slider 302, and a second blocking ring 307 is sleeved on the second connecting rod 306. The second blocking ring 307 is used to trigger the second sensor 207. It is easy to understand that the second connecting rod 306 is provided to provide a mounting base for the second blocking ring 307, and the second blocking ring 307 can be set at any position of the second connecting rod 306 as needed. When the second slider 302 moves outward a certain distance, the second blocking ring 307 triggers the second sensor 207, so that the second sensor 207 transmits a stop signal to the cylinder 300.

[0053] 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 211 is provided on the rear template 202. After the mold is closed, the positioning block 211 extends into the positioning groove 105. It is easy to understand that after the mold is closed, the positioning block 211 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.

[0054] Please refer to Figure 1 In one possible embodiment, the rear mold assembly further includes a rear mold fixing plate 200, a square iron 201, and a lifting plate 208. Two square irons 201 are provided, one on each side of the rear mold fixing plate 200. The lifting plate 208 is movably mounted on the rear mold fixing plate 200 and positioned between the two square irons 201. It should be noted that the lifting plate 208 is provided with a plurality of ejector pins that are slidably disposed within the rear mold plate 202 and the rear mold core 203. During demolding, the lifting plate 208 is driven by an external drive member to perform a lifting motion, and the molded product is ejected by the ejector pins, thereby separating the molded product from the rear mold core 203.

[0055] Please refer to Figure 5In one possible embodiment, a stopper 209 is provided on the side wall of the lifting plate 208, and a third sensor 210 is provided on the side wall of the square iron 201. The stopper 209 is used to trigger the third sensor 210. It should be noted that two third sensors 210 are provided side by side on the side wall of the square iron 201. When the lifting plate 208 is in the initial state, the stopper 209 triggers the third sensor 210 located below. When the lifting plate 208 is in the fully lifted state, the stopper 209 triggers the third sensor 210 located above. The provision of the third sensors 210 enables the mold to accurately control the distance the lifting plate 208 moves.

[0056] Please refer to Figure 2 In one possible embodiment, a receiving groove 103 is provided on the front mold plate 102, and a front mold core 104 is located in the middle of the bottom of the receiving groove 103. After the mold is closed, the first-side core-pulling mechanism extends into the receiving groove 103. It should be noted that the receiving groove 103 is cross-shaped, and the front mold core 104 is located in the middle of the bottom of the receiving groove 103. After the mold is closed, the receiving groove 103 is used to accommodate the first-side core-pulling mechanism, which helps to improve the overall structural stability of the mold.

[0057] Please refer to Figure 3 and Figure 9 , It should be added that, the mold also includes a second side core pulling mechanism, the second side core pulling mechanism includes a third slider 500 and an inclined guide column 502, the third slider 500 can be slidably set on the rear template 202, the third slider 500 is provided with an inclined guide hole 501, the inclined guide column 502 is provided on the front template 102, and is located at the bottom of the accommodating groove 103, the inclined guide column 502 extends into the inclined guide hole 501, when the front mold assembly is separated from the rear mold assembly, the inclined guide column 502 can drive the third slider 500 to slide outward, in addition, a limiting column 503 is provided at the bottom of the third slider 500, and a limiting clip 212 is provided on the rear template 202. When the third slider 50 0 After sliding outward a certain distance, the limiting column 503 enters the limiting clamp 212, 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. After the mold is closed, the third slider 500 extends into the accommodating groove 103 to improve the stability of the third slider 500; 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.

[0058] 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 set-top box 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, the rear mold plate is provided with a rear mold core corresponding to the front mold core, and the rear mold plate is also provided with a first limiting groove; The first side core pulling mechanism includes a cylinder, 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 first slider; The first slider is slidably arranged in the second slider, and a second limiting groove is provided on the bottom wall of the first slider; The second slider is a hollow structure, and an elastic limiter is provided on the bottom wall of the second slider, and the elastic limiter passes through the bottom wall of the second slider. In the mold closing state, the lower end of the elastic limiter extends into the first limiter groove, and the upper end of the elastic limiter contacts the bottom wall of the first slider. When the first slider slides outward a certain distance, the upper end of the elastic limiter extends into the second limiter groove, and the lower end of the elastic limiter disengages from the first limiter groove.

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

3. The high-precision set-top box chassis frame mold according to claim 2, characterized in that: The top surface of the limiting block is a curved surface.

4. The high-precision set-top box 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.

5. The high-precision set-top box chassis frame mold according to claim 4, 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.

6. The high-precision set-top box chassis frame mold according to claim 4, 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.

7. The high-precision set-top box 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.

8. The high-precision set-top box chassis frame mold according to claim 1, characterized in that: The rear mold assembly also includes a rear mold fixing plate, square iron and a lifting plate; There are two square irons, which are respectively arranged on both sides of the rear mold fixing plate; The lifting plate can be movably arranged on the rear mold fixing plate and is located between the two square irons.

9. The high-precision set-top box chassis frame mold according to claim 8, characterized in that: A stopper is provided on the side wall of the lifting plate, and a third sensor is provided on the side wall of the square iron. The stopper is used to trigger the third sensor.

10. The high-precision set-top box chassis frame mold according to claim 1, characterized in that: The front template is provided with a receiving groove, the front mold core is located in the middle of the bottom of the receiving groove, and after the mold is closed, the first side core pulling mechanism extends into the receiving groove.

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