A deep cavity four-slide injection mold

Abstract

The utility model provides a deep cavity four-slide injection mold, characterized in that it comprises an upper mold and a lower mold capable of realizing mold closing, an upper mold core is provided at the bottom of the upper mold, and the outer extension of the upper mold core is inclined and slidably equipped with a plurality of slide blocks, a lower mold core is provided at the upper end of the lower mold, and a molding cavity for molding deep cavity products is formed between the lower surface of the upper mold core, the inner wall of the slide block and the outer wall of the lower mold core; the lower mold core comprises a lower mold core body, and a mounting opening is provided at the top of the lower mold core body, and an insert is fixed in the mounting opening, and a gap is provided between the outer wall of the insert block and the inner wall of the mounting opening to form an air outlet groove, and the air outlet groove is connected with an air channel arranged in the lower mold core and is used to assist in discharging. The utility model deep cavity four-slide injection mold has a compact structure, can realize rapid molding and stripping of deep cavity products, has high production efficiency and good product quality, and is suitable for batch manufacturing and use.

Description

Technical Field

[0001] The utility model relates to a mould, in particular to a deep cavity four-slide injection mould. Background Art

[0002] Plastic products are injection molded by injection molds. Injection molding by injection molds is a processing method used in mass production of certain parts with complex shapes. During processing, the heated and melted plastic is injected into the mold cavity by the injection molding machine under high pressure. After cooling and solidification, the molded product is obtained. The molded workpiece will remain inside the fixed mold and needs to be demolded by a demolding mechanism.

[0003] When manufacturing products with deep cavities, due to their great depth, a certain amount of friction and adsorption will be generated between the inner cavity of the product and the punch. Using traditional ejector pins will cause the demoulding to be too slow or even damage the product, affecting production efficiency and product quality. Utility Model Content

[0004] Technical issues to be solved

[0005] The technical problem to be solved by the utility model is to provide a deep cavity four-slide injection mold which can realize rapid molding of deep cavity products and rapid and effective demoulding.

[0006] Technical solutions to the problem

[0007] The utility model provides a deep cavity four-slide injection mold, which includes an upper mold 1 and a lower mold 2 that can achieve mold closing, an upper mold core 3 is provided at the bottom of the upper mold 1, and the outer extension of the upper mold core 3 is inclined and slidably equipped with a plurality of slide blocks 4, and a lower mold core is provided at the upper end of the lower mold 2, and a molding cavity for molding a deep cavity product 7 is formed between the lower surface of the upper mold core 3, the inner wall of the slide block 4 and the outer wall of the lower mold core; the lower mold core includes a lower mold core body 6, and a mounting opening is opened at the top of the lower mold core body 6, an insert 5 is fixed in the mounting opening, a gap is provided between the outer wall of the insert 5 and the inner wall of the mounting opening to form an air outlet groove 550, and the air outlet groove 560 is connected with the air channel arranged in the lower mold core and is used to assist in material discharge.

[0008] Furthermore, a width H of the air outlet groove 560 is greater than or equal to 0.008 mm and less than or equal to 0.02 mm.

[0009] Furthermore, the air outlet direction of the air outlet slot 560 is tilted upward and outward.

[0010] Furthermore, the air outlet groove 560 is located at the junction of the top surface and the side wall of the lower mold core.

[0011] Furthermore, there is a fillet or chamfer between the top surface of the insert 5 and the side wall of the lower mold body 6, and the air outlet groove 560 is arranged on the fillet or chamfer.

[0012] Furthermore, the upper end of the inner wall of the mounting opening is inclined outward to form a first plane 61a, and the upper end of the outer wall of the insert 5 is inclined outward to form a second plane 51a parallel to the first plane 61a. There is a gap between the first plane 61a and the second plane 51a to form an air outlet groove inclined upward.

[0013] Furthermore, the angle between the first plane 61a and the horizontal plane is greater than or equal to 30 degrees and less than or equal to 60 degrees.

[0014] Furthermore, a main air duct 60 is provided in the lower mold body 6, a secondary air duct 50 connected to the main air duct 60 is provided in the insert 5, an annular air cavity connected to the air outlet groove is provided between the outer wall of the insert 5 and the inner wall of the mounting port, and the annular air cavity is connected to the secondary air duct 50 through a connecting air duct.

[0015] Furthermore, the lower bottom surface of the upper mold 1 is concave inward and forms an installation cavity, the upper mold core 3 is fixed on the upper bottom surface of the installation cavity, the inner wall of the installation cavity is provided with an inclined guide block 8, and the inclined guide block 8 is obliquely provided with a guide rail 81, and the slider 4 is provided with a guide groove 400 for accommodating the guide rail 81 to pass through and realize oblique sliding; the slider is provided with a guide hole 40 parallel to the guide groove 400, and the upper mold 1 is provided with a guide rod 12 that can be inserted into the guide hole and is used to move the slider horizontally, and an elastic component 121 is provided between the upper mold and the slider, and the elastic component 121 makes the slider have a downward movement tendency.

[0016] Furthermore, the lower mold is provided with a first limit block 13, the first limit block 13 is provided with a limit groove opening outward, the bottom of the slider 4 is provided with a second limit block 14, the second limit block is provided with a limit protrusion 141, when the mold is closed, the slider moves to the inner limit position and the limit protrusion 141 is inserted into the limit groove to achieve radial limit and axial limit.

[0017] Beneficial Effects

[0018] The utility model discloses a deep cavity four-slide injection mold, which adopts a multi-slide structure, can realize the rapid formation and splitting of the side wall of the molding cavity, is convenient for the injection molding and demolding of deep cavity products, reduces the contact and friction between the side wall of the product and the die during demolding, and has a good demolding effect; at the same time, an air outlet groove structure is provided, which can convert the negative pressure of the inner cavity part of the product into a positive pressure, realize auxiliary discharging, avoid the damage of the product caused by simple top material, and have a good demolding effect; the air outlet groove is provided at the rounded corner, with a large air outlet area, and is close to the bottom surface and side wall of the deep cavity, further improving the auxiliary discharging effect; the lower mold adopts a split structure, which is convenient for processing and production, has low processing cost and high precision, and is convenient and labor-saving to assemble; the utility model discloses a deep cavity four-slide injection mold, which has a compact structure, can realize the rapid molding and demolding of deep cavity products, has high production efficiency and good product quality, and is suitable for batch manufacturing and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural schematic diagram of a deep cavity four-slide injection mold of the utility model;

[0020] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0021] Figure 3 for Figure 2 Enlarged view of middle part B;

[0022] Figure 4 It is a cross-sectional view of the deep cavity four-slide injection mold of the utility model;

[0023] Figure 5 This is a schematic diagram of the installation of the sliders of the deep cavity four-slide injection mold of the utility model;

[0024] Figure 6 It is a cross-sectional view of the slider of the deep cavity four-slider injection mold of the utility model;

[0025] Figure 7 It is a schematic diagram of the installation of the oblique guide block of the deep cavity four-slide injection mold of the utility model;

[0026] Figure 8 This is a schematic diagram of the structure of the limit block of the deep cavity four-slide injection mold of the utility model;

[0027] Fig. 9 It is a cross-sectional view of the oblique guide block of the deep cavity four-slide injection mold of the utility model. DETAILED DESCRIPTION

[0028] The following is a detailed description of the embodiments of the present utility model in conjunction with the accompanying drawings.

[0029] See also Figure 1-Figure 9The utility model provides a deep cavity four-slide injection mold, which is used for injection molding of deep cavity products. Deep cavity products are products with a certain depth, such as barrel-shaped structures, etc. It includes an upper mold 1 and a lower mold 2. The upper mold 1 and the lower mold 2 can realize mold closing and mold separation. An upper mold core 3 is provided at the bottom of the upper mold 1, and a plurality of sliders 4 are provided on the outer extension of the upper mold core 3. In this embodiment, there are four sliders 4, which are respectively arranged in the front, back, left and right directions of the upper mold core. A lower mold core is provided at the upper end of the lower mold 2. A molding cavity is formed between the lower surface of the upper mold core 3, the inner wall of the slider 4 and the outer wall of the lower mold core. The molding cavity is used for injection molding of deep cavity products 7.

[0030] In the present application, the lower mold core includes a lower mold core body 6, which is fixed on the lower mold 2 and is located directly below the upper mold core. At the same time, a mounting opening is opened on the top of the lower mold core body 6. The mounting opening has a larger size, and its diameter is 80%-95% of the diameter of the lower mold core body. An insert 5 is fixed in the mounting opening, and there is a gap between the outer wall of the insert 5 and the inner wall of the mounting opening to form an air outlet groove 550. In this embodiment, the lower bottom surface of the insert is in contact with the bottom surface of the mounting opening. , to achieve axial positioning, the lower end outer wall of the insert 5 is in contact with the lower end inner wall of the installation port to achieve radial positioning, and there is a gap between the upper end outer wall of the insert and the upper end outer wall of the installation port to form an air outlet groove; at the same time, an air duct is arranged in the lower mold core, the air inlet end of the air duct is connected with an air source, and the air outlet end of the air duct is connected with the air outlet groove, which is used to supply air to the air outlet groove, so that it can inflate the inner cavity of the product during demoulding, break the negative pressure, form positive pressure, realize auxiliary discharging, and have good discharging effect and high efficiency.

[0031] The top surface of the insert 5 in the present application serves as the entire top surface of the lower mold core, that is, the upper molding surface of the lower mold core, and the side wall of the lower mold core body 6 serves as the outer molding surface of the lower mold core.

[0032] In this embodiment, the gas outlet groove 560 is an annular structure and is arranged along the edge (contour) of the lower mold core, and the width H of the gas outlet groove 560 is greater than or equal to 0.008 mm and less than or equal to 0.02 mm, which prevents molten plastic from entering during injection molding and allows gas to be discharged at the same time; in order to further improve the effect of auxiliary discharge, the gas outlet direction of the gas outlet groove 560 in this embodiment is upward and tilted outward, see Figure 2 and Figure 3 ; and the air outlet groove 560 is located at the junction of the top surface and the side wall of the lower mold core. Specifically, there is a fillet or chamfer between the top surface of the insert 5 and the side wall of the lower mold core body 6, and the air outlet groove 560 is arranged on the fillet or chamfer.

[0033] See also Figure 2 and Figure 3The upper end of the inner wall of the mounting opening is inclined outward to form a first plane 61a. The angle between the first plane 61a and the horizontal plane is greater than or equal to 30 degrees and less than or equal to 60 degrees. The first plane is inclined upward toward the axial direction of the lower mold core. At the same time, the upper end of the outer wall of the insert 5 is inclined outward to form a second plane 51a. The second plane 51a is parallel to the first plane 61a. The second plane 51a is inclined downward, that is, toward the first plane. The first plane 61a and the second plane 51a are parallel to each other, and there is a gap between the two, thereby forming an upward-inclined air outlet groove.

[0034] A main air channel 60 is provided in the lower mold body 6. At the same time, a secondary air channel 50 coaxial with and connected to the main air channel 60 is provided in the insert 5. At the same time, a sealing ring is provided between the insert and the installation port. The sealing ring is located between the main air channel and the secondary air channel and is used for sealing. At the same time, an annular groove is provided on the outer wall of the insert. The annular groove is arranged at the lower end of the outer wall of the insert, that is, at the lower end of the second plane, and an annular air cavity is formed between the annular groove and the inner wall of the installation port. The upper end of the air cavity is connected to the air outlet groove. At the same time, the secondary air channel is connected to the annular air cavity for air supply. The above-mentioned main air channel and the secondary air channel form an air channel as a connecting channel between the air source and the air outlet groove.

[0035] The slider structure is described below;

[0036] See also Figure 4-Figure 9 The lower bottom surface of the upper mold 1 is concave inward to form a mounting cavity, and the upper mold core 3 is fixed on the upper bottom surface (end surface) of the mounting cavity. At the same time, an inclined guide block 8 is provided on the inner wall of the mounting cavity. In this embodiment, the inclined guide blocks 8 are multiple groups, and are respectively arranged on the inner wall of the mounting cavity. Each group includes 2-3 inclined guide blocks. A guide rail 81 is obliquely arranged on the inclined guide block 8. The cross section of the guide rail is T-shaped or trapezoidal. At the same time, a guide groove 400 with the same cross section as the guide rail is opened on the slider 4. The guide groove 400 can accommodate the guide rail 81 to pass through, so that the slider is obliquely slid on the inclined guide block; at the same time, a guide hole 40 is opened on the slider, and the guide hole is parallel to the length direction of the guide groove 400. A guide rod 12 is provided on the upper mold 1. The axis of the guide rod 12 is parallel to the axis of the guide hole. The guide rod 12 can be inserted into the guide hole to drive the slider to move horizontally, that is, the guide rod is driven to move up and down by the upper mold. Since the guide rod is tilted, it can drive the slider to slide in the direction close to or away from the molding cavity to achieve mold closing and mold separation. At the same time, an elastic component 121 is provided between the upper mold and the slider. In this embodiment, the elastic component 121 is a spring and is sleeved on the guide rod. The elastic component makes the slider have a downward movement trend. When the mold is separated, the slider is pushed to slide tilted downward and outward under the action of the elastic force. When the mold is closed, it moves upward and inward under the action of the lower mold.

[0037] In the present application, the outer wall of the slider is a slope. When it is located at the inner (upper) limit position, it contacts the inclined side wall of the mounting cavity, thereby forming a supporting force for the slider, ensuring the internal pressure during injection molding, and improving the molding effect and reliability of use.

[0038] In order to improve the overall accuracy and operational reliability, a first limit block 13 is provided on the lower mold, and the top of the first limit block 13 is bent radially outward to form a clamping portion 131. A limit groove is formed between the clamping portion 131 and the upper end surface of the upper mold, and the opening of the limit groove is set outward. At the same time, a second limit block 14 corresponding to the first limit block is provided at the bottom of the slider 4, and a limit protrusion 141 is provided on the second limit block. When the mold is closed, the slider moves to the inner limit position. At this time, the limit protrusion 141 is snapped into the limit groove, thereby realizing radial and axial limitation of the slider, which ensures the movement accuracy of the slider and can provide a certain supporting force to ensure the accuracy of the slider during injection molding.

[0039] The utility model discloses a deep cavity four-slide injection mold, which adopts a multi-slide structure, can realize the rapid formation and splitting of the side wall of the molding cavity, is convenient for the injection molding and demolding of deep cavity products, reduces the contact and friction between the side wall of the product and the die during demolding, and has a good demolding effect; at the same time, an air outlet groove structure is provided, which can convert the negative pressure of the inner cavity part of the product into a positive pressure, realize auxiliary discharging, avoid the damage of the product caused by simple top material, and have a good demolding effect; the air outlet groove is provided at the rounded corner, with a large air outlet area, and is close to the bottom surface and side wall of the deep cavity, further improving the auxiliary discharging effect; the lower mold adopts a split structure, which is convenient for processing and production, has low processing cost and high precision, and is convenient and labor-saving to assemble; the utility model discloses a deep cavity four-slide injection mold, which has a compact structure, can realize the rapid molding and demolding of deep cavity products, has high production efficiency and good product quality, and is suitable for batch manufacturing and use.

[0040] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A deep cavity four-slide injection mold, characterized in that: It comprises an upper die and a lower die capable of achieving mold closing, an upper die core is arranged at the bottom of the upper die, a plurality of sliders are arranged on the outer extension inclined sliding part of the upper die core, a lower die core is arranged at the upper end of the lower die, a molding cavity for molding deep-cavity products is formed between the lower surface of the upper die core, the inner wall of the slider and the outer wall of the lower die core; the lower die core comprises a lower die core body, a mounting opening is arranged at the top of the lower die core body, an insert is fixed in the mounting opening, a gap is provided between the outer wall of the insert and the inner wall of the mounting opening to form an air outlet groove, the air outlet groove is connected with an air channel arranged in the lower die core and is used to assist in material discharge.

2. The deep cavity four-slide injection mold according to claim 1, characterized in that: The width H of the air outlet groove is greater than or equal to 0.008 mm and less than or equal to 0.02 mm.

3. The deep cavity four-slide injection mold according to claim 1, characterized in that: The air outlet direction of the air outlet groove is upward and inclined outward.

4. The deep cavity four-slide injection mold according to claim 1, characterized in that: The air outlet groove is located at the junction of the top surface and the side wall of the lower mold core.

5. The deep cavity four-slide injection mold according to claim 4, characterized in that: A fillet or chamfer is provided between the top surface of the insert and the side wall of the lower mold core body, and the air outlet groove is arranged on the fillet or chamfer.

6. The deep cavity four-slide injection mold according to claim 1, characterized in that: The upper end of the inner wall of the installation opening is inclined outward to form a first plane, and the upper end of the outer wall of the insert is inclined outward to form a second plane parallel to the first plane. There is a gap between the first plane and the second plane to form an upwardly inclined air outlet groove.

7. The deep cavity four-slide injection mold according to claim 6, characterized in that: The angle between the first plane and the horizontal plane is greater than or equal to 30 degrees and less than or equal to 60 degrees.

8. The deep cavity four-slide injection mold according to claim 1, characterized in that: A main air channel is provided in the lower mold body, a secondary air channel connected to the main air channel is provided in the insert block, an annular air cavity connected to the air outlet groove is provided between the outer wall of the insert block and the inner wall of the mounting port, and the annular air cavity is connected to the secondary air channel through a connecting air channel.

9. The deep cavity four-slide injection mold according to claim 1, characterized in that: The lower bottom surface of the upper mold is concave inward to form an installation cavity, the upper mold core is fixed on the upper bottom surface of the installation cavity, the inner wall of the installation cavity is provided with an inclined guide block, the inclined guide block is provided with a guide rail inclinedly, the slider is provided with a guide groove for accommodating the guide rail to pass through and realize inclined sliding; the slider is provided with a guide hole parallel to the guide groove, the upper mold is provided with a guide rod that can be inserted into the guide hole and is used to move the slider horizontally, and an elastic component is provided between the upper mold and the slider, and the elastic component makes the slider have a downward movement tendency.

10. The deep cavity four-slide injection mold according to claim 9, characterized in that: The lower mold is provided with a first limit block, the first limit block is provided with a limit groove opening outward, the bottom of the slider is provided with a second limit block, the second limit block is provided with a limit protrusion, when the mold is closed, the slider moves to the inner limit position and the limit protrusion is inserted into the limit groove to achieve radial limit and axial limit.

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