Injection mold for producing mobile phone protective sleeve

Abstract

The utility model discloses an injection mold for producing a mobile phone protective sleeve, which relates to the technical field of injection molds and comprises a lower mold base and an upper mold base, a lower mold plate is arranged on the lower mold base, a lower mold core is arranged on the lower mold plate, a lower mold groove is formed on the lower mold core, an upper mold plate is arranged at the lower end of the upper mold base, and an upper mold core is arranged at the lower end of the upper mold plate. An upper mold groove is formed in the lower end of the upper mold core; an injection molding channel communicated with the upper mold groove is formed in the upper mold base; a first movable groove is formed in the inner side face of a lower die groove of the lower die core and extends into a lower die plate, an L-shaped rod is arranged in the first movable groove, one end of the L-shaped rod faces the inner bottom face of the lower die groove and is connected with an outer ejector block, the other end of the L-shaped rod extends downwards and is connected with a telescopic rod, and first air cylinders are installed on the two sides of the outer end of the lower die plate correspondingly. The telescopic rod penetrates through the lower template and is connected with the first cylinder; and demolding is smoother, excessive pulling and friction are avoided in the demolding process, the risks of deformation and scratching are reduced, and the quality of finished products is improved.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and in particular to an injection mold for producing mobile phone protective cases. Background Technology

[0002] Molds, as an important industrial production equipment, are widely used in many industries, from simple metal stampings to complex plastic products. They are an indispensable part of manufacturing products by providing materials with specific shapes, dimensions, and surface properties. Injection molds, as one of the important methods of molding plastic products, work by injecting heated plastic into a closed mold cavity. After the plastic cools and hardens, the mold is opened to remove the molded product.

[0003] Mobile phone case injection molds are a type of injection mold specifically used for producing mobile phone cases. With the development of mobile communication technology, mobile phones have become an indispensable communication tool in people's daily lives. In order to protect mobile phones from damage caused by drops or collisions, the demand for mobile phone cases has also increased. Therefore, designing an efficient mobile phone case injection mold that can guarantee product quality is particularly important.

[0004] Although existing injection molds for mobile phone cases can meet the needs of mass production to a certain extent, there are still some shortcomings in practical applications. In particular, during the production process of mobile phone cases, the edges of the cases are often designed with curved edges to provide a better feel and protection. This makes it difficult to apply the traditional direct demolding method, which can easily lead to a decline in product quality. For example, when using traditional ejector pins for direct demolding, the edges of the mobile phone case are easily scratched during the ejection process, affecting the appearance quality and user experience of the final product. Another example is that forcibly ejecting the mobile phone case may cause deformation due to residual stress, resulting in dimensional instability.

[0005] Therefore, it is necessary to propose a new technical solution to address the above problems. Utility Model Content

[0006] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the aforementioned problems.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an injection mold for producing mobile phone protective cases, comprising a lower mold base and an upper mold base, wherein a lower template is provided on the lower mold base, a lower mold core is provided on the lower template, a lower mold groove is formed on the lower mold core, an upper template is provided at the lower end of the upper mold base, an upper mold core is provided at the lower end of the upper template, an upper mold groove is formed at the lower end of the upper mold core, and an injection channel communicating with the upper mold groove is provided on the upper mold base;

[0008] The lower mold core has a first movable groove on the inner side of the lower mold groove. The first movable groove extends into the lower template. An L-shaped rod is provided in the first movable groove. One end of the L-shaped rod faces the bottom surface of the lower mold groove and is connected to an outer top block. The other end of the L-shaped rod extends downward and is connected to a telescopic rod. A first cylinder is installed on both sides of the outer end of the lower template. The telescopic rod passes through the lower template and is connected to the first cylinder.

[0009] The first movable groove has space for the L-shaped rod to move, and the outer top block corresponds to the end position of the arc corner of the lower mold groove.

[0010] As a further embodiment of this utility model: a second cylinder is installed at the lower end of the lower mold base, and a lower plate is driven and connected to the upper end of the second cylinder. Multiple ejector rods are connected to the lower plate, and the ejector rods pass through the lower mold base, the lower mold plate, and the lower mold core and are flush with the bottom surface of the lower mold groove.

[0011] As a further embodiment of this utility model: the lower mold core is provided with a second movable groove at the corresponding position of the arc-shaped edge on the outer side of the lower mold groove. A slider is provided in the second movable groove. One side of the slider faces an arc surface corresponding to the arc-shaped edge of the lower mold groove. The second movable groove extends into the lower mold plate. A support rod is connected to the lower end of the slider. The support rod is connected to the telescopic rod through the second movable groove.

[0012] The second movable groove has space for the slider to move.

[0013] As a further embodiment of this utility model: a cooling channel is provided inside the lower mold plate and arranged around the lower mold core. Two water injection heads are installed on one side of the lower mold plate, and the two water injection heads are respectively connected to the water inlet and water outlet of the cooling channel.

[0014] As a further embodiment of this utility model: slots are provided on both sides of the lower end of the upper template, and buffer springs are connected in the slots. Base plates are provided on both sides of the lower end of the upper template at positions corresponding to the slots, and the buffer springs are connected to the base plates.

[0015] As a further embodiment of this utility model: a buffer block is provided in the slot, the buffer block is connected to the base plate, and the buffer spring is sleeved on the outside of the buffer block.

[0016] As a further embodiment of this utility model: support legs are provided at the four corners of the lower end of the lower mold base.

[0017] Compared with existing technologies, the beneficial effects of this technical solution are as follows:

[0018] 1. During demolding, the first cylinder is activated to move the telescopic rod, L-shaped rod, and support rod outward. As the L-shaped rod moves, it pushes the outer ejector to push the inward-curving end of the phone case product in the lower mold groove due to the curved edge design. At the same time, the support rod moves to drive the slider, so that the outer ejector can push the curved edge of the finished phone case outward, that is, the inward-curving end is no longer interlocked with the lower mold groove. Then, the second cylinder uses the lower plate and multiple ejector pins to push the finished phone case upward to demold. During the demolding process, the curved edge of the finished phone case is pushed outward by the outer ejector, making the demolding smoother and avoiding excessive pulling and friction of the finished phone case during the demolding process, thereby reducing the risk of deformation and scratches and improving the quality of the finished product.

[0019] 2. After the plastic fluid is injected into the mold cavity consisting of the upper mold groove and the lower mold groove through the injection channel, water is introduced into the cooling channel from one end of the water injection head by connecting one water injection head to the water injection pipe and the other water injection head to the water outlet pipe. The cooling channel is set around the lower mold core, so that the water can carry the heat of the lower mold core and be discharged outward from the other water injection head, thereby cooling the product in the mold cavity to facilitate demolding.

[0020] 3. When the upper and lower mold plates are closed, the bottom plate first contacts the lower mold plate, causing the bottom plate to move into the groove and squeeze the buffer spring and buffer block. During the squeezing process of the buffer spring and buffer block, the buffer spring and buffer block absorb and weaken the impact force, thereby reducing the vibration force when the upper and lower mold plates are closed, so as to improve the service life of the upper and lower mold plates.

[0021] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a cross-sectional structural diagram of the present invention;

[0024] Figure 2 This is a top view cross-sectional structural diagram of the lower template of this utility model;

[0025] Figure 3 yes Figure 1 Enlarged schematic diagram of a local structure at point A;

[0026] Figure 4 yes Figure 1 Enlarged schematic diagram of the local structure at point B;

[0027] The corresponding labels in the attached diagram are explained as follows:

[0028] 1. Lower mold base; 11. Support leg; 2. Upper mold base; 21. Injection runner; 3. Lower mold plate; 31. Lower mold core; 32. Lower mold groove; 33. First movable groove; 34. Second movable groove; 35. Cooling channel; 36. Water injection head; 4. Upper mold plate; 41. Upper mold core; 42. Upper mold groove; 43. Groove opening; 5. L-shaped rod; 51. Outer ejector block; 52. Telescopic rod; 6. First cylinder; 7. Second cylinder; 71. Lower plate; 72. Ejector rod; 8. Slider; 81. Support rod; 9. Buffer spring; 91. Base plate; 92. Buffer block. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figure 1-4 An injection mold for producing mobile phone protective cases includes a lower mold base 1 and an upper mold base 2. The lower mold base 1 is provided with a lower template 3, and the lower template 3 is provided with a lower mold core 31. The lower mold core 31 is formed with a lower mold groove 32. The lower end of the upper mold base 2 is provided with an upper template 4, and the lower end of the upper template 4 is provided with an upper mold core 41. The lower end of the upper mold core 41 is formed with an upper mold groove 42. The upper mold base 2 has an injection channel 21 that communicates with the upper mold groove 42. When the mold is closed, the upper mold groove 42 and the lower mold groove 32 merge to form a product mold cavity. Plastic fluid is injected into the mold cavity through the injection channel 21. After the plastic fluid cools and solidifies, demolding can be performed.

[0031] The lower mold core 31 has a first movable groove 33 on the inner side of the lower mold groove 32. The first movable groove 33 extends into the lower mold plate 3. An L-shaped rod 5 is provided in the first movable groove 33. One end of the L-shaped rod 5 faces the inner bottom surface of the lower mold groove 32 and is connected to an outer top block 51. The other end of the L-shaped rod 5 extends downward and is connected to a telescopic rod 52. A first cylinder 6 is installed on both sides of the outer end of the lower mold plate 3. The telescopic rod 52 passes through the lower mold plate 3 and is connected to the first cylinder 6. The first movable groove 33 has space for the L-shaped rod 5 to move, and the outer top block 51 corresponds to the end position of the arc corner of the lower mold groove 32.

[0032] A second cylinder 7 is installed at the lower end of the lower mold base 1. A lower plate 71 is driven and connected to the upper end of the second cylinder 7. Multiple ejector rods 72 are connected to the lower plate 71. The ejector rods 72 pass through the lower mold base 1, the lower mold plate 3 and the lower mold core 31 and are flush with the bottom surface of the lower mold groove 32.

[0033] The lower mold core 31 is provided with a second movable groove 34 at the corresponding arc-shaped edge on the outer side of the lower mold groove 32. A slider 8 is provided in the second movable groove 34. One side of the slider 8 faces the arc surface corresponding to the arc-shaped edge of the lower mold groove 32. The second movable groove 34 extends into the lower mold plate 3. A support rod 81 is connected to the lower end of the slider 8. The support rod 81 is connected to the telescopic rod 52 through the second movable groove 34. The second movable groove 34 has space for the slider 8 to move.

[0034] During demolding, the first cylinders 6 on both sides are activated, causing the telescopic rod 52 to extend and retract. The telescopic rod 52 then moves the L-shaped rod 5 and the support rod 81 outwards. As the L-shaped rod 5 moves within the first movable groove 33, it pushes the outer ejector block 51 at its other end. This causes the outer ejector block 51 to push the inward-curving end of the phone case product in the lower mold groove 32, formed by the curved edge design. Simultaneously, as the support rod 81 moves within the second movable groove 34, it drives the slider 8, releasing the outer space of the outer edge of the phone case product in the lower mold groove 32, thereby allowing... At this point, the curved edge of the finished phone case is pushed outward by the outer push block 51, meaning the inner end no longer interlocks with the lower mold groove 32. Then, the second cylinder 7 is activated, causing the lower plate 71 to move upward, which in turn causes multiple ejector pins to push the finished phone case upward, thus completing the demolding process. During the demolding process, the curved edge of the finished phone case is pushed outward by the outer push block, making the demolding smoother and avoiding excessive pulling and friction on the finished phone case during demolding, thereby reducing the risk of deformation and scratches and improving the quality of the finished product.

[0035] Preferably, the lower mold plate 3 has a cooling channel 35 arranged around the lower mold core 31, and two water injection heads 36 are installed on one side of the lower mold plate 3. The two water injection heads 36 are respectively connected to the water inlet and water outlet of the cooling channel 35.

[0036] After the plastic fluid is injected into the mold cavity consisting of the upper mold groove 42 and the lower mold groove 32 through the injection channel 21, water is introduced into the cooling channel 35 by connecting one water injection head 36 to the water injection pipe and the other water injection head 36 to the water outlet pipe. The cooling channel 35 is arranged around the lower mold core 31, so that the water can carry the heat of the lower mold core 31 and be discharged outward from the other water injection head 36, thereby cooling the product in the mold cavity to facilitate demolding.

[0037] Preferably, slots 43 are provided on both sides of the lower end of the upper template 4, and buffer springs 9 are connected in the slots 43. Base plates 91 are provided on both sides of the lower end of the upper template 4 at positions corresponding to the slots 43. Buffer springs 9 are connected to base plates 91. Buffer blocks 92 are provided in the slots 43, and buffer blocks 92 are connected to base plates 91. Buffer springs 9 are sleeved on the outside of buffer blocks 92.

[0038] Specifically, when the upper template 4 and the lower template 3 are closed, the bottom plate 91 first contacts the lower template 3, causing the bottom plate 91 to move into the groove 43 and squeeze the buffer spring 9 and the buffer block 92. During the process of squeezing the buffer spring 9 and the buffer block 92, the buffer spring 9 and the buffer block 92 absorb and weaken the impact force, thereby reducing the vibration force when the upper template 4 and the lower template 3 are closed, so as to improve the service life of the upper template 4 and the lower template 3.

[0039] Preferably, support legs 11 are provided at the four corners of the lower end of the lower mold base 1, and the support legs 11 are used to provide stable support for the present invention.

[0040] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. An injection mold for producing mobile phone protective cases, characterized in that, The mold includes a lower mold base (1) and an upper mold base (2). The lower mold base (1) is provided with a lower template (3). The lower template (3) is provided with a lower mold core (31). The lower mold core (31) is formed with a lower mold groove (32). The lower end of the upper mold base (2) is provided with an upper template (4). The lower end of the upper template (4) is provided with an upper mold core (41). The lower end of the upper mold core (41) is formed with an upper mold groove (42). The upper mold base (2) is provided with an injection channel (21) that communicates with the upper mold groove (42). The lower mold core (31) has a first movable groove (33) on the inner side of the lower mold groove (32). The first movable groove (33) extends into the lower template (3). An L-shaped rod (5) is provided in the first movable groove (33). One end of the L-shaped rod (5) faces the inner bottom surface of the lower mold groove (32) and is connected to an outer top block (51). The other end of the L-shaped rod (5) extends downward and is connected to a telescopic rod (52). A first cylinder (6) is installed on both sides of the outer end of the lower template (3). The telescopic rod (52) passes through the lower template (3) and is connected to the first cylinder (6). The first movable groove (33) has space for the L-shaped rod (5) to move, and the outer top block (51) corresponds to the end position of the arc corner of the lower mold groove (32).

2. The injection mold for producing mobile phone protective cases according to claim 1, characterized in that, The lower mold base (1) is equipped with a second cylinder (7) at its lower end. The upper end of the second cylinder (7) is connected to a lower plate (71). The lower plate (71) is connected to multiple ejector rods (72). The ejector rods (72) pass through the lower mold base (1), the lower mold plate (3), and the lower mold core (31) and are flush with the bottom surface of the lower mold groove (32).

3. The injection mold for producing mobile phone protective cases according to claim 2, characterized in that, The lower mold core (31) is provided with a second movable groove (34) at the corresponding arc-shaped edge outside the lower mold groove (32). A slider (8) is provided in the second movable groove (34). One side of the slider (8) faces an arc surface corresponding to the arc-shaped edge of the lower mold groove (32). The second movable groove (34) extends into the lower mold plate (3). A support rod (81) is connected to the lower end of the slider (8). The support rod (81) is connected to the telescopic rod (52) through the second movable groove (34). The second movable groove (34) has space for the slider (8) to move.

4. The injection mold for producing mobile phone protective cases according to claim 1, characterized in that, The lower template (3) has a cooling channel (35) arranged around the lower mold core (31). Two water injection heads (36) are installed on one side of the lower template (3). The two water injection heads (36) are respectively connected to the water inlet and water outlet of the cooling channel (35).

5. The injection mold for producing mobile phone protective cases according to claim 1, characterized in that, The upper template (4) has slots (43) on both sides of its lower end. A buffer spring (9) is connected inside the slot (43). A base plate (91) is provided on both sides of the lower end of the upper template (4) at the position corresponding to the slot (43). The buffer spring (9) is connected to the base plate (91).

6. The injection mold for producing mobile phone protective cases according to claim 5, characterized in that, A buffer block (92) is provided inside the slot (43). The buffer block (92) is connected to the base plate (91), and the buffer spring (9) is sleeved on the outside of the buffer block (92).

7. The injection mold for producing mobile phone protective cases according to claim 1, characterized in that, Support legs (11) are provided at the four corners of the lower end of the lower mold base (1).

Images