Injection mold for injection molding of shell with holes in side face

Abstract

The utility model relates to an injection mold for injection molding of a shell with holes in the side face. Comprising an upper mold, an upper mold core is arranged in the upper mold, and the left side and the right side of the upper mold core are each provided with two upper cavities; a lower mold core is arranged in the lower mold, and two lower cavities are formed in each of the left side and the right side of the lower mold core; side surface core-pulling mechanisms are respectively arranged on two sides of the lower die; the side face core pulling mechanism comprises a sliding block and a side mold core, a sliding groove matched with the sliding block is formed in the upper end face of the lower mold, the lower mold core is provided with a side inserting hole communicated with the cavity, and the side inserting hole is located at one end of the sliding groove. The outer end of the side mold core penetrates through the lower mold core and is connected with a connecting block, an L-shaped clamping groove is formed in the end, close to the connecting block, of the sliding block, an L-shaped clamping part is arranged at the outer end of the connecting block, and the L-shaped clamping part is clamped into the L-shaped clamping groove from the side face of the sliding block. The L-shaped clamping groove is formed in the sliding block, the L-shaped clamping part is arranged at the outer end of the connecting block, and the sliding block is connected with the connecting block in a clamping mode, so that mounting and dismounting are convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an injection mold for injection molding a shell with a side opening. Background Art

[0002] At present, injection molds are widely used to form various plastic products. When the side of the plastic product has an opening or a recessed hole, the injection mold is generally provided with a side core pulling mechanism. When the mold is opened, the side core pulling mechanism is activated at the same time to pull out the side mold core set on the side. For example, the patent number is: C2201920736397.9, and the name is: A utility model patent for an injection mold of a blood pressure monitor housing with a side opening. The technical solution of this patent is to set a side linkage sliding structure on the side of the front mold, that is, a side core pulling mechanism to perform side core pulling. During the core pulling process, there will be friction between the side mold core of the side core pulling mechanism and the rear mold core, which will cause some wear to the side mold core. When a certain number of products are injected, the amount of wear will affect the quality of the product, so it needs to be replaced. However, the current connection structure causes the side mold core and the slider to be disassembled and assembled when the side mold core is replaced, which is relatively inconvenient. Summary of the Invention

[0003] The purpose of the utility model is to provide an injection mold for injection molding a shell with a side opening, in view of the deficiencies in the prior art, wherein the side mold core of the injection mold is easy to replace.

[0004] The technical solution adopted by this utility model is:

[0005] An injection mold for injection molding a housing with a side opening, comprising:

[0006] The upper mold has an upper mold core inside, and two upper cavities are respectively provided on the left and right sides of the upper mold core;

[0007] The lower mold has a lower mold core inside, and two lower cavities are respectively provided on the left and right sides of the lower mold core;

[0008] The upper cavity and the lower cavity are arranged opposite to each other, and the upper cavity and the corresponding lower cavity are spliced into an injection cavity; the upper mold is connected to a main mold core, and the lower end of the main mold core is inserted into the injection cavity; side core pulling mechanisms are respectively provided on both sides of the lower mold;

[0009] The side core pulling mechanism includes a slider and a side mold core. The upper end surface of the lower mold is provided with a slide groove matching the slider. The lower mold core is provided with a side socket connected to the cavity, and the side socket is located at one end of the slide groove; the outer end of the side mold core passes through the lower mold core and is connected to a connecting block. An L-shaped slot is provided on the end of the slider close to the connecting block, and an L-shaped clamping portion is provided on the outer end of the connecting block. The L-shaped clamping portion is clamped into the L-shaped slot from the side of the slider.

[0010] Furthermore, a threaded hole is provided on the outer side of the slide groove and is connected with a limiting bolt.

[0011] Furthermore, extension blocks extend outward from the lower ends of both sides of the slider, and installation notches are respectively provided at the upper ends of the two side walls of the slide groove, and the installation notches are connected to the limiting blocks. One side of the limiting block extends into the slide groove, and a limiting space that cooperates with the extension block is formed between the limiting block and the bottom surface of the slide groove, and the limiting block is inserted into the limiting space.

[0012] Furthermore, the upper mold is provided with an inclined guide hole and an inclined guide column on both sides, and the upper end of the inclined guide hole is provided with a countersunk hole for accommodating the head of the inclined guide column; the upper mold is provided with a mounting hole on both sides, the mounting hole is located above the countersunk hole, and a pressure block is provided in the mounting hole, which is fixedly connected to the upper mold by bolts.

[0013] Furthermore, the upper end of the slider protrudes from the lower mold, the upper mold is provided with a receiving hole that matches the upper end of the slider, the outer side surface of the slider is inclined, and the side wall of the receiving hole is provided with an inclined surface that matches the outer side surface of the slider.

[0014] Furthermore, an upper mounting hole for accommodating the upper mold core is provided in the middle of the upper mold, and recessed holes are provided on all four sides of the upper end surface of the upper mold core. The upper mold is provided with a protrusion that matches the recessed hole, and the protrusion extends into the recessed hole and is fixedly connected to the upper mold core by bolts.

[0015] Preferably, the concave hole is located in the middle of the four sides of the upper end surface.

[0016] More preferably, the corner of the end of the recessed hole is an inwardly concave arc angle.

[0017] The beneficial effects of the utility model are as follows: the utility model provides an L-shaped slot on the slider, and an L-shaped clamping portion on the outer end of the connecting block, so that the slider is clamped with the connecting block, which is convenient for installation and disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of the injection mold of this embodiment.

[0019] Figure 2 for Figure 1 A structural diagram without the upper fixed plate, middle plate and nozzle plate.

[0020] Figure 3 for Figure 2 A schematic diagram of removing the upper mold.

[0021] Figure 4 for Figure 3 A schematic diagram of point A in the middle.

[0022] Figure 5 for Figure 2 A cross-sectional schematic diagram of .

[0023] Figure 6 for Figure 3 A schematic diagram of removing the upper and lower mold cores.

[0024] Figure 7 A schematic diagram of the cooperation between the slider and the side mold core.

[0025] Reference numerals:

[0026] 1—upper fixed plate; 2—middle plate; 3—sprue plate; 4—upper die; 5—lower die; 6—limit block; 7—limit bolt; 8—chute; 9—oblique guide column; 10—slider; 11—outer side; 12—limit space; 13—connecting block; 14—lower die core; 15—upper die core; 16—concave hole; 17—convex block; 18—side die core; 19—oblique guide hole; 20—shell; 21—main die core; 22—upper cavity; 23—lower cavity; 24—L-shaped slot; 25—extension block; 26—pressing block; 27—inclined surface. DETAILED DESCRIPTION

[0027] The following is a detailed description of the present invention with reference to the accompanying drawings. Figures 1 to 7 shown.

[0028] Embodiment: An injection mold for injection molding a shell with a side opening, comprising: an upper mold 4 and a lower mold 5; an upper mold core 15 is provided in the upper mold 4, and two upper cavities 22 are provided on the left and right sides of the upper mold core 15; a lower mold core 14 is provided in the lower mold 5, and two lower cavities 23 are provided on the left and right sides of the lower mold core 14; the upper cavities 22 and the lower cavities 23 are arranged one by one opposite to each other, and the upper cavities 22 and the corresponding lower cavities 23 are spliced into an injection cavity; the upper mold 4 is connected to a main mold core 21, and the lower end of the main mold core 21 is inserted into the injection cavity; side core pulling mechanisms are provided on both sides of the lower mold 5;

[0029] See also Figures 3 to 7 The side core-pulling mechanism includes a slider 10 and a side mold core 18. The upper end surface of the lower mold 5 is provided with a chute 8 that cooperates with the slider 10. The lower mold core 14 is provided with a side socket that communicates with the mold cavity. The side socket is located at one end of the chute 8. The outer end of the side mold core 18 passes through the lower mold core 14 and is connected to the connecting block 13. The end of the slider 10 near the connecting block 13 is provided with an L-shaped slot 24. The outer end of the connecting block 13 is provided with an L-shaped snap-fit portion, which snaps into the L-shaped slot 24 from the side of the slider 10. During injection molding, the side opening of the housing 20 is formed where the side mold core 18 is located.

[0030] The side core pulling mechanism in the embodiment of the present application uses a snap-fit mechanism to connect the side mold core 18 to the slider 10. During installation, the outer end of the connecting block 13 is first snap-fitted to one end of the slider 10. During the snap-fitting process, the connecting block 13 slides in from the side of the slider 10, and the L-shaped connecting portion at the outer end of the connecting block 13 snaps into the L-shaped slot 24 of the slider 10. The connecting block 13 can now move along the length of the L-shaped slot 24 of the slider 10. The position of the connecting block 13 is then adjusted so that the side mold core 18 is aligned with the side insertion hole on the mold core, and the slider 10 is moved into the chute 8 of the lower mold 5, while the side mold core 18 is inserted into the side insertion hole. When replacement is required, the slider 10 is withdrawn from the chute 8 of the lower mold 5, and the connecting block 13 and side mold core 18 are simultaneously withdrawn from the lower mold 5. After withdrawal, a new side mold core 18 is replaced; the side mold core 18 is then snap-fitted to the slider 10 from the side via the connecting block 13. The entire process is convenient and simple to implement.

[0031] Furthermore, a threaded hole is provided on the outer side of the slide groove 8 and is connected with a limiting bolt 7 .

[0032] The limiting bolt 7 is provided so that during the injection molding process, the slider 10 is restricted by the limiting bolt 7 when moving outward along the chute 8, thereby preventing it from falling out of the chute 8. Of course, a shovel base or a limiting block 6 can also be provided at the outer end of the chute 8; the limiting bolt 7 has a simple structure and is easy to operate.

[0033] See also Figure 4 , extension blocks 25 extend outward from the lower ends of both sides of the slider 10, and installation notches are respectively opened at the upper ends of the two side walls of the slide 8, and the installation notches are connected to the limit blocks 6. One side of the limit blocks 6 extends into the slide 8, and a limit space 12 that cooperates with the extension block 25 is formed between the limit blocks 6 and the bottom surface of the slide 8, and the limit blocks 6 are inserted into the limit space 12.

[0034] When the upper mold 4 and the lower mold 5 are opened, the slider 10 will move outward along the slide groove 8; during the entire mold opening and closing process, the slider 10 moves on the lower mold 5. In order to prevent the slider 10 from separating from the lower mold 5, limit blocks 6 are set on both sides of the slider 10, and the limit blocks 6 are installed on the two side walls of the slide groove 8. A limit space 12 is formed between the limit block 6 and the bottom surface of the slide groove 8 to restrict the limit block 6. The limit block 6 can only move along the slide groove 8 within the limit space 12 and cannot separate from the slide groove 8, thereby preventing the slider 10 from separating from the lower mold 5.

[0035] See also Figure 4 、 Figure 7, the upper die 4 is provided with an inclined guide hole 19 and an inclined guide column 9 on both sides, and a countersunk hole (not shown) for accommodating the head of the inclined guide column 9 is provided at the upper end of the inclined guide hole 19; the upper die 4 is provided with a mounting hole on both sides, the mounting hole is located above the countersunk hole, and a pressure block 26 is provided in the mounting hole, and the pressure block 26 is fixedly connected to the upper die 4 by bolts, see Figure 2 .

[0036] At present, in many injection molds, the inclined guide pin 9 is generally fixed by bolts. Referring to the patent technology in the background technology, this connection method makes the inclined guide pin 9 basically have no space for movement, which leads to the need for precise matching of the inclined guide pin 9 and the guide hole on the slider 10 during the injection molding process, resulting in the need for higher processing accuracy and higher matching degree, which leads to increased processing costs; in the implementation of this application, inclined guide holes 19 and countersunk holes are used to install the inclined guide pin 9, and the lower end of the inclined guide pin 9 passes through the inclined guide hole 19 and extends into the guide hole of the slider 10, and the head of the inclined guide pin 9 is stuck in the countersunk hole; due to the low manufacturing accuracy, the inclined guide pin 9 has a certain amount of movable space in the inclined guide hole 19, which can meet the needs of slight position adjustment of the inclined guide pin 9, so that the inclined guide pin 9 can have a certain degree of redundancy when matching with the guide hole of the slider 10, which can reduce processing accuracy and processing costs. Secondly, in order to prevent the inclined guide column 9 from escaping from the upper mold 4 , a mounting hole and a pressing block 26 are provided on the upper mold 4 , and the pressing block 26 restricts the inclined guide column 9 within the upper mold 4 .

[0037] Furthermore, the upper end of the slider 10 protrudes from the lower mold 5, the upper mold 4 is provided with a receiving hole that cooperates with the upper end of the slider 10, the outer side surface 11 of the slider 10 is inclined, and the side wall of the receiving hole is provided with a slope 27 that cooperates with the outer side surface 11 of the slider 10.

[0038] When the slider 10 is in the mold opening state, it moves outward under the traction of the inclined guide pin 9. When the mold is closed, the force of the mold closing is very large. If the inclined guide pin 9 is relied on alone, it is easy to break the inclined guide pin 9. To avoid this, the upper mold 4 is provided with a receiving hole and an inclined surface 27 that match the upper end of the slider 10. When the mold is closed, the upper end of the slider 10 enters the receiving hole, and the outer side surface 11 of the slider 10 abuts against the inclined surface 27 of the side wall of the receiving hole. At the same time, the inclined guide pin 9 is inserted into the guide hole of the slider 10. Under the pressure of the inclined surface 27 of the upper mold 4, the slider 10 moves inward and gradually enters the receiving hole. The inclined surface 27 of the upper mold 4 can bear and share the large pressure, preventing the inclined guide pin 9 from bearing it alone. This can not only reset the slider 10 but also prevent the inclined guide pin 9 from breaking.

[0039] Furthermore, an upper mounting hole for accommodating the upper mold core 15 is provided in the middle of the upper mold 4, and recessed holes 16 are provided on all four sides of the upper end surface of the upper mold core 15. The upper mold 4 is provided with a protrusion 17 that cooperates with the recessed hole 16. The protrusion 17 extends into the recessed hole 16 and is fixedly connected to the upper mold core 15 by bolts.

[0040] Preferably, the recessed hole 16 is located in the middle of the four sides of the upper end surface.

[0041] In the embodiment of the present application, in order to facilitate the fixed connection between the upper mold core 15 and the upper mold 4, recessed holes 16 are exemplarily provided on the four sides of the upper end surface of the upper mold core 15. Preferably, the recessed holes 16 are located in the middle of the four sides of the upper mold core 15. At the same time, a corresponding protrusion 17 is provided on the upper mold 4, and the protrusion 17 extends into the recessed hole 16. The protrusion 17 and the upper mold core 15 are respectively provided with corresponding connecting holes, and the protrusion 17 is fixedly connected to the upper mold core 15 by bolts, thereby fixing the upper mold core 15 to the upper mold 4.

[0042] More preferably, the corner of the end of the recessed hole 16 is an inwardly concave arc angle.

[0043] The corner of the end of the concave hole 16 is set to an arc angle to facilitate the matching and installation of the upper mold core 15 and the upper mold 4.

[0044] Secondly, it should be noted that the injection mold also includes an upper fixed plate 1, an intermediate plate 2, a sprue plate 3, square iron and a lower fixed plate, etc. These and the upper mold 4 and lower mold 5 can all be existing technologies and will not be repeated in this application.

[0045] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there may be changes in the specific implementation methods and application scope. The content of this specification should not be understood as limiting the present invention.

Claims

1. An injection mold for injection molding a housing with a side opening, comprising: The upper mold has an upper mold core inside, and two upper cavities are respectively provided on the left and right sides of the upper mold core; The lower mold has a lower mold core inside, and two lower cavities are respectively provided on the left and right sides of the lower mold core; The upper cavity and the lower cavity are arranged opposite to each other, and the upper cavity and the corresponding lower cavity are spliced into an injection cavity; the upper mold is connected to a main mold core, and the lower end of the main mold core is inserted into the injection cavity; side core pulling mechanisms are respectively provided on both sides of the lower mold; It is characterized in that: the side core pulling mechanism includes a slider and a side mold core, the upper end surface of the lower mold is provided with a slide groove matching the slider, the lower mold core is provided with a side socket connected to the cavity, and the side socket is located at one end of the slide groove; the outer end of the side mold core passes through the lower mold core and is connected to a connecting block, an L-shaped slot is provided on the end of the slider close to the connecting block, and an L-shaped clamping portion is provided on the outer end of the connecting block, and the L-shaped clamping portion is clamped into the L-shaped slot from the side of the slider.

2. The injection mold for injection molding a housing with a side opening according to claim 1, characterized in that: The outer side of the slide groove is provided with a threaded hole and is connected with a limiting bolt.

3. The injection mold for injection molding a housing with a side opening according to claim 2, characterized in that: Extension blocks extend outward from the lower ends of both sides of the slider, and installation notches are respectively provided at the upper ends of the two side walls of the slide groove, and the installation notches are connected to the limiting blocks. One side of the limiting block extends into the slide groove, and a limiting space that cooperates with the extension block is formed between the limiting block and the bottom surface of the slide groove, and the limiting block is inserted into the limiting space.

4. The injection mold for injection molding a housing with a side opening according to claim 3, characterized in that: The upper mold is respectively provided with an inclined guide hole and an inclined guide column at an angle, and the upper end of the inclined guide hole is provided with a countersunk hole for accommodating the head of the inclined guide column; the upper mold is respectively provided with a mounting hole, the mounting hole is located above the countersunk hole, and a pressure block is provided in the mounting hole, which is fixedly connected to the upper mold by bolts.

5. The injection mold for injection molding a housing with side openings according to claim 4, characterized in that: The upper end of the slider protrudes from the lower mold, the upper mold is provided with a receiving hole that matches the upper end of the slider, the outer side surface of the slider is inclined, and the side wall of the receiving hole is provided with an inclined surface that matches the outer side surface of the slider.

6. The injection mold for injection molding a housing with a side opening according to claim 5, characterized in that: The middle part of the upper mold is provided with an upper mounting hole for accommodating the upper mold core. The four sides of the upper end surface of the upper mold core are provided with concave holes. The upper mold is provided with a protrusion that matches the concave hole. The protrusion extends into the concave hole and is fixedly connected to the upper mold core by bolts.

7. The injection mold for injection molding a housing with side openings according to claim 6, characterized in that: The concave holes are located in the middle of the four sides of the upper end surface.

8. The injection mold for injection molding a housing with side openings according to claim 7, characterized in that: The corner of the end of the concave hole is an inward-concave arc angle.

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