An inner slide mechanism

Abstract

The present invention relates to the field of injection mold technology, in particular to an inner slider mechanism. The inner slider mechanism comprises: a slider block, which is fixed on an inclined guide column and fixed on a female template at one end; a slider, which is arranged in a male template, and comprises a slider body, a first slider insert and a second slider insert, wherein the slider body is provided with a sliding sleeve for the other end of the slider block, the first slider insert is locked on one end of the slider body, and a T-shaped guide groove is provided on one inclined surface of the slider body, and the second slider insert slides on the inclined surface of the first slider insert along the T-shaped guide groove through the T-shaped guide block on its inclined surface, and the other end of the second slider insert is a groove, one end of the groove is adapted to the product undercut setting, and the other end is engaged with a stopper fixed on the male template when the mold is closed; by adopting the cooperation of the first and second slider inserts to withdraw the undercut to the outside of the product, the inner slider mechanism is suitable for injection molding of large, medium and small products, and there is no requirement for the mold core size, so it is easy to ensure the mold core strength and save costs.

Description

[Technical field]

[0001] The invention relates to the technical field of injection molds, in particular to an inner slide mechanism. [Background technology]

[0002] Plastic products are used in all aspects of modern life. According to the requirements of use, some plastic products need to be injection molded into a shape with a hook on the inner side of the edge. When the existing injection mold is used to process such products with a hook, since the product is formed inside the mold core, the product is usually demoulded by sliding the inner slider into the mold core to remove the hook, and the distance from the slider to the inner edge of the product cannot be too small. If it is too small, the mold core strength cannot be guaranteed. If it is too large, the mold core and the machine size will increase, thereby increasing the machine and mold repair costs, and it is not suitable for injection molding small products.

[0003] In view of this, it is necessary to develop an inner slider mechanism to solve the above problems. [Summary of the invention]

[0004] Therefore, the purpose of the present invention is to provide an inner slider mechanism, which changes the exit method of the inner slider in the original mechanism by adopting two slider inserts, that is, the inner slider is changed from withdrawing the underhook toward the inside of the product to withdrawing the underhook toward the outside of the product by cooperating with two slider inserts. This inner slider structure is not only suitable for injection molding of large, medium and small products, but also can ensure the strength of the mold core itself when the finished product is underhooked, thereby saving production costs.

[0005] In order to achieve the above objectives, the present invention provides an inner slider mechanism to solve the above problems.

[0006] The solution of the present invention to solve the technical problem is: an inner slider mechanism is applied to a mold, the mold includes a female mold plate and a male mold plate, and the inner slider mechanism includes:

[0007] A slider block is sleeved and fixed on the inclined guide column, one end of the slider block is fixed on the mother template after being sleeved on the inclined guide column, and the slider block has a straight surface and an inclined surface at an inclined angle to the straight surface;

[0008] The slider is arranged in the male mold plate, and includes a slider body, a first slider insert and a second slider insert. One end of the slider body has a straight surface and an inclined surface corresponding to the slider bundle block. The straight surface is provided with an inclined guide post hole, which allows the inclined guide post to pass through one end of the slider bundle block and slide into the sleeve. The guide slider moves in the lateral direction. The inclined surface is the sliding contact surface between the slider bundle block and the slider body. Both ends of the contact surface between the slider body and the male mold plate extend to both sides to form two step-shaped extensions. The end of the slider body close to the mold core is a step surface:

[0009] A first slider insert is locked on the step surface, one end of the first slider insert is an inclined surface, a T-shaped guide groove is provided on the inclined surface, and a limiting column is provided in the T-shaped guide groove;

[0010] One end of the second slider insert is an inclined surface corresponding to the inclined surface of the first slider insert, and a T-shaped guide block is arranged on the inclined surface. The T-shaped guide block can slide in the T-shaped guide groove. The second slider insert is slidably arranged on the inclined surface of the first slider insert through the T-shaped guide block and the T-shaped guide groove. A limiting groove is penetrated through the T-shaped guide block of the second slider insert. The length of the limiting groove is less than the length of the T-shaped guide block. The limiting column is inserted in the limiting groove, thereby limiting the sliding displacement of the second slider insert and preventing the second slider insert from slipping off. The other end of the second slider insert is a first groove part. One end of the first groove part protrudes into the product and adapts to the product undercut shape setting, and the other end protrudes out of the slider body when the mold is closed. The shapes of the first slider insert and the second slider insert when the mold is closed adapt to the inner buckle shape of the product;

[0011] A slider pressing block, one end of which is fixed on the male mold plate, and a sliding space is left between the other end and the male mold plate. During the mold opening and closing process, the slider pressing block can press and guide the extension of the slider body to slide in the sliding space;

[0012] A stopper, one end of which is fixed on the male mold plate, and the other end of which is a second groove portion. The protrusions at both ends of the second groove portion have different heights. In the mold closing state, the second groove portion can just engage with the protrusion at one end of the first groove portion protruding from the slider body to prevent the slider insert from moving under the injection pressure, and can apply force to the second slider insert in the initial stage of mold opening, thereby controlling the movement direction of the second slider insert in the initial stage of mold opening;

[0013] The elastic element has one end arranged in the slider body and the other end arranged in the male template.

[0014] Preferably, a first wear-resistant plate is provided on the inclined surface where the slider body and the slider bundle are in sliding contact, so as to prevent wear between the slider bundle and the corresponding inclined surface of the slider body.

[0015] Preferably, a second wear-resistant plate is provided on the sliding contact surface between the male template and the slider body to prevent wear between the male template and the slider body.

[0016] Preferably, the second wear-resistant plate is provided with an oblique guide post hole at a position corresponding to the oblique guide post hole on the straight surface of the slider body.

[0017] Preferably, the elastic element is a spring.

[0018] Preferably, a slider limit block is also provided on the male template in the slider withdrawal direction to prevent the slider from withdrawing too far.

[0019] The beneficial effect of the present invention is that by adopting an inner slider mechanism with two slider inserts, the exit method of the inner slider in the original mechanism is changed, that is, the inner slider is changed from withdrawing the barb toward the inside of the product to withdrawing the barb toward the outside of the product by the cooperation of two slider inserts. The inner slider mechanism in this technical solution is suitable for injection molding of large, medium and small products, and has no requirements on the mold core size, so it is easy to ensure the mold core strength and save production costs.

Brief Description of the Drawings

[0020] Figure 1 It is a schematic diagram of a female mold plate and a male mold plate of a mold in which an inner slider mechanism is located in the present invention.

[0021] Figure 2 It is a combined schematic diagram of an inner slider mechanism of the present invention in a mold closing state.

[0022] Figure 3 It is an enlarged schematic diagram of the contact portion between the first slider insert and the second slider insert in a mold closing state of an inner slider mechanism of the present invention.

[0023] Figure 4 It is a side view of an inner slider mechanism of the present invention in a mold closing state.

[0024] Figure 5 It is an exploded schematic diagram of an inner slider mechanism of the present invention.

[0025] Figure 6 It is a schematic diagram of the initial stage of mold opening of an inner slider mechanism of the present invention.

[0026] Figure 7 It is a schematic diagram of a completely mold-opening state of an inner slider mechanism of the present invention.

[0027] Figure 8 It is a cross-sectional view of a product with undercuts processed by an inner slider mechanism of the present invention. [Specific implementation method]

[0028] To further illustrate the technical means and effects adopted by the present invention, the following is a detailed description in conjunction with the embodiments of the present invention and the accompanying drawings.

[0029] The present invention provides an inner slider mechanism, which is applied to a mold, wherein the mold comprises a female mold plate 1 and a male mold plate 2, and the inner slider structure comprises:

[0030] The slider block 10 is inserted and fixed on the inclined guide column 11. After the slider block 10 is inserted into the inclined guide column 11, one end of the slider block 10 is fixed on the mother template 1. The slider block 10 has a straight surface and a sloped surface with an inclined angle to the straight surface.

[0031] The slider 3 is arranged in the male mold plate 2. Correspondingly, the male mold plate 2 is provided with a receiving space for the slider 3 to slide therein, and includes a slider body 30, a first slider insert 31 and a second slider insert 32;

[0032] The slider body 30 has a straight surface and an inclined surface corresponding to the slider block 10, and an inclined guide post hole 301 is provided on the straight surface, so that the inclined guide post 11 can pass through one end of the slider block 10 and slide into the sleeve, wherein the guide slider 3 moves in the lateral direction, and the slider body 30 is provided with a first wear-resistant plate 303 on the inclined surface in sliding contact with the slider block 10 to prevent wear between the slider block 10 and the corresponding inclined surface of the slider body 30, and the contact surface between the male template 2 and the slider body 30 is provided with a second wear-resistant plate 23 to prevent wear between the slider body 30 and the male template 2, and the second wear-resistant plate 23 is provided with an inclined guide post hole 301 at a position corresponding to the inclined guide post hole 301 on the straight surface of the slider body 30, and the two ends of the contact surface between the slider body 30 and the male template 2 extend to both sides to form two step-shaped extensions 302, and the slider body 30 has a step surface at one end close to the mold core:

[0033] The step surface is locked with a first slider insert 31, one end of the first slider insert 31 is an inclined surface, a T-shaped guide groove 310 is arranged on the inclined surface, and a limiting column 311 is arranged in the T-shaped guide groove 310; one end of the second slider insert 32 is an inclined surface corresponding to the inclined surface of the first slider insert 31, and a T-shaped guide block 320 is arranged on the inclined surface, and the T-shaped guide block 320 can slide in the T-shaped guide groove 310;

[0034] The second slider insert 32 is slidably arranged on the inclined surface of the first slider insert 31 through a T-shaped guide block 320 and a T-shaped guide groove 310. A limiting groove 321 is penetrated through the T-shaped guide block 320 of the second slider insert 32. The length of the limiting groove 321 is less than the length of the T-shaped guide block 320. The limiting column 311 is inserted into the limiting groove 321 to limit the sliding displacement of the second slider insert 32 and prevent the second slider insert 32 from slipping off. The other end of the second slider insert 32 is a first groove portion 322. One end of the first groove portion 322 protrudes into the product 5 and adapts to the shape of the product underhook 50. The other end protrudes out of the slider body 30 when the mold is closed. The shapes of the first slider insert 31 and the second slider insert 32 when the mold is closed adapt to the inward buckle shape of the product.

[0035] The slider block 20 has one end fixed on the male mold plate 2 and a sliding space between the other end and the male mold plate 2. During the mold opening and closing process, the slider block 20 can press and guide the extension portion 302 of the slider body 30 to slide in the sliding space.

[0036] The stopper 21 has one end fixed on the male mold plate 2 and the other end being a second groove portion 210. The protrusions at both ends of the second groove portion 210 have different heights. In the mold closing state, the second groove portion 210 can just engage with the protrusion of one end of the first groove portion 322 protruding from the slider body 30, thereby fixing the slider insert to prevent the slider insert from moving under the injection pressure. During the mold opening process, the stopper 21 can apply force to the second slider insert 32 in the initial stage of mold opening, thereby controlling the movement direction of the second slider insert 32 in the initial stage of mold opening.

[0037] The elastic element 4 has one end disposed in the slider body 30 and the other end disposed in the male mold plate 2. The elastic element 4 can be a spring. When the mold is closed, the elastic element 4 is in a compressed state. When the mold is opened, the elastic element 4 is in an extended state. The elastic element 4 can help drive the slider 3 to slide during the process of opening and closing the mold.

[0038] The male template 2 is also provided with a slider limit stopper 22 in the direction in which the slider 3 withdraws, so as to prevent the slider 3 from withdrawing too far.

[0039] The working process of the present invention is as follows: when closing the mold, the male mold plate 2 and the female mold plate 1 are gradually closed, and under the action of the slider block 10 and the inclined guide column 11, the slider body 30 and the first slider insert 31 move toward the mold core. After moving for a certain distance, the second slider insert 32 slides along the inclined surface in contact with the first slider insert 31 under the action of the limit column 311 and the stopper 21 until the first slider insert 31 is flush with the second slider insert 32, and the slider insert enters the interior of the mold core. The stopper 21 fixes the slider insert, and injection molding begins;

[0040] When the mold is opened after the product is injection molded, the male mold plate 2 and the female mold plate 1 are gradually opened, and the slider 3 is withdrawn from the product under the action of the inclined guide column 11 and the spring 4. In the initial stage of mold opening, since the second groove portion 210 of the stopper 21 is engaged with the protrusion of one end of the slider body 30 protruding from the first groove portion 322, when the slider 3 begins to withdraw in the previous short stroke, the stopper 21 will give the second slider insert 32 a reaction force, so that the second slider insert 32 and the first slider insert 31 move relative to each other until there is no interference between the stopper 21 and the second slider insert 32. At this time, the reaction force disappears, and the second slider insert 32 continues to move on the inclined surface in contact with the first slider insert 31 under the action of the inclined surface and the T-shaped guide groove 310 on the first slider insert 31, until it is completely withdrawn from the product underhook 50, and the mold opening is completed.

[0041] In summary, the beneficial effects of the present invention are as follows: by adopting an inner slider mechanism with two slider inserts, the exit method of the inner slider in the original mechanism is changed, that is, the inner slider is changed from withdrawing the barb to the inside of the product to withdrawing the barb to the outside of the product by the cooperation of two slider inserts. The inner slider structure in this technical solution is suitable for injection molding of large, medium and small products, and has no requirements on the mold core size, so it is easy to ensure the mold core strength and save production costs.

[0042] It should be pointed out that the present invention is not limited to the above-mentioned implementation modes, and any simple modifications, equivalent changes and modifications made to the above-mentioned embodiments by any technician familiar with the profession based on the technical solution of the present invention fall within the protection scope of the present invention.

Claims

1. An inner slider structure, applied to a mold, the mold comprising a female mold plate and a male mold plate, characterized in that: The inner slider structure comprises: A slider block is sleeved and fixed on the inclined guide column, and one end of the slider block is fixed on the mother template after being sleeved on the inclined guide column. The slider block has a straight surface and an inclined surface at an inclined angle to the straight surface; A slider is arranged in the male template, and comprises a slider body, a first slider insert and a second slider insert, wherein one end of the slider body has a straight surface and an inclined surface corresponding to the slider bundle block, and the straight surface is provided with an inclined guide post hole, which allows the inclined guide post to pass through one end of the slider bundle block and slide and insert, wherein the inclined surface is a sliding contact surface between the slider bundle block and the slider body, and both ends of the contact surface between the slider body and the male template extend to both sides to form two step-shaped extensions; One end of the slider body close to the mold core is a step surface, and a first slider insert is locked on the step surface. One end of the first slider insert is an inclined surface, and a T-shaped guide groove is provided on the inclined surface. A limit column is provided in the guide groove. One end of the second slider insert is an inclined surface corresponding to the inclined surface of the first slider insert. A T-shaped guide block is provided on the inclined surface, and the T-shaped guide block can slide in the T-shaped guide groove. The second slider insert is slidably arranged on the inclined surface of the first slider insert through the T-shaped guide block and the T-shaped guide groove. A limiting groove is formed through the T-shaped guide block of the second slider insert, the length of which is less than that of the T-shaped guide block, the limiting column is inserted into the limiting groove, the other end of the second slider insert is a first groove portion, the two ends of the first groove portion have different protrusions at different heights, one end protrudes into the product and adapts to the product undercut shape setting, and the other end protrudes out of the slider body when the mold is closed, and the shapes of the first slider insert and the second slider insert when the mold is closed adapt to the inward buckle shape of the product; A slider pressing block, one end of which is fixed on the male mold plate, and a sliding space is left between the other end and the male mold plate. During the mold opening and closing process, the slider pressing block can press and guide the extension of the slider body to slide in the sliding space; A stopper, one end of which is fixed on the male mold plate, and the other end of which is a second groove portion, wherein the protrusions at both ends of the second groove portion have different heights, and in the mold closing state, the second groove portion can just engage with the protrusion at one end of the first groove portion protruding from the slider body; The elastic element has one end arranged in the slider body and the other end arranged in the male template.

2. An inner slider structure according to claim 1, characterized in that: A first wear-resistant plate is arranged on the inclined surface where the slider body and the slider bundle block are in sliding contact, so as to prevent wear between the slider bundle block and the corresponding inclined surface of the slider body.

3. An inner slider structure according to claim 1, characterized in that: A second wear-resistant plate is provided on the sliding contact surface between the male template and the slider body to prevent wear between the male template and the slider body.

4. An inner slider structure according to claim 3, characterized in that: The second wear-resistant plate is provided with an oblique guide post hole at a position corresponding to the oblique guide post hole on the straight surface of the slider body.

5. The inner slider structure according to claim 1, characterized in that: The elastic element is a spring.

6. An inner slider structure according to claim 1, characterized in that: A slider limit stopper is also arranged on the male template in the direction of the slider withdrawal to prevent the slider from withdrawing too far.

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