Injection mold for upper cover of camera main body

Abstract

The utility model discloses a camera main body upper cover injection mold which comprises a mold body, the mold body comprises an upper mold and a lower mold, the upper mold comprises an upper mold plate, a fixing plate and a top plate, the lower mold comprises a lower mold plate, two supporting plates, a bottom plate and an ejection assembly, an upper mold core is bolted in the bottom end of the upper mold plate, and a lower mold core is bolted in the top end of the lower mold plate; the double-station first mold cavity and the double-station male mold are arranged on the upper mold core and the lower mold core, the two side pulling assemblies are matched to form a product cavity, production efficiency is improved, three times of demolding are adopted during demolding, the upper mold and the lower mold are separated for the first time, and stepped hole demolding is conducted through the hole demolding assembly in the process of separating the upper mold core and the lower mold core for the second time; and in the third demolding process, the electric push rod resets to drive the mounting block, the first forming block and the second forming block to be separated from the male mold, and finally the ejector pin assembly ejects the product out, so that the product is rapidly demolded, and the demolding efficiency and quality are guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology, specifically relating to an injection mold for the upper cover of a camera body. Background Technology

[0002] An injection mold consists of two parts: an upper mold assembly and a lower mold assembly. The lower mold assembly is mounted on the moving platen of the injection molding machine, while the upper mold assembly is mounted on the fixed platen. During injection molding, the upper and lower mold assemblies close to form the gating system and the cavity. When the mold opens, the upper and lower mold assemblies separate to allow the plastic product to be removed.

[0003] As an indispensable product in various fields of modern society, cameras also rely heavily on plastic components, especially those designed for... Figure 1 The camera body cover structure includes a cylindrical body 9 with protrusions 901 on both sides and a cylinder 902 at the top. An extension shell 903 communicating with the front end of the body 9 is provided. Grooves 904 are provided in the middle of the inner walls on both sides of the extension shell 903, and stepped holes 905 are provided in the middle of the grooves. However, after the camera body cover is injection molded, a demolding process is required. Due to the presence of the extension shell 903 and the stepped holes 905 on the body 9, demolding is inconvenient and can easily lead to defective products. Therefore, a camera body cover injection mold is designed to overcome the above-mentioned technical defects. Utility Model Content

[0004] (1) Technical problems to be solved

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an injection mold for the upper cover of a camera body to solve the above-mentioned technical problems.

[0006] (2) Technical solution

[0007] To solve the above-mentioned technical problems, this utility model provides an injection mold for a camera body cover, including a mold body, which includes an upper mold and a lower mold. The upper mold includes an upper template, a fixing plate, and a top plate. The lower mold includes a lower template, two support plates, a bottom plate, and an ejector assembly. An upper mold core is bolted to the bottom end of the upper template, and a lower mold core is bolted to the top end of the lower template. The upper mold core has first mold cavities on both the left and right sides of its bottom. The upper mold core has mounting grooves on the bottom of the upper mold core and on the side of the two first mold cavities that are far apart from each other. The mounting grooves are connected to the first mold cavities. The inner top wall of the mounting groove has an arc-shaped second mold cavity in the middle. The mounting groove has inclined grooves in the middle of the front and rear sides. The upper surface of the lower mold core has punches integrally formed at the middle of both ends and the positions corresponding to the first mold cavities. The upper ends of the two punches that are far apart from each other have mating grooves in the middle. The upper ends of the front and rear sides of the punches have protrusions integrally formed. The lower template has side-pulling assemblies that mate with the punches and the upper template on both the left and right sides.

[0008] Preferably, a circular hole is provided in the middle of the inner top wall of the first mold cavity, and side grooves are provided on both sides of the inner wall of the first mold cavity and at the end near the mounting groove. An annular forming part is bolted to the top of the upper mold core and inside the circular hole. A gate is provided in the middle of the top of the top plate, and a double-headed runner assembly communicating with the gate is installed in the middle of the top of the fixed plate. The bottom ends of the double-headed runner assembly extend into the interior of the corresponding annular forming part.

[0009] Preferably, the upper surface of the lower template is provided with a first receiving groove in the middle that is adapted to the lower mold core, and the middle of both the left and right ends of the lower template is provided with a sliding groove that is connected to the first receiving groove. The upper ends of the inner walls on both the front and rear sides of the sliding groove are provided with clearances, and guide blocks are bolted inside the clearances. The end of the guide block away from the clearance extends into the interior of the sliding groove. The middle of both the left and right ends of the lower mold core and the edge of the punch are provided with guide grooves, and the height of the guide grooves is higher than the height of the sliding grooves.

[0010] Furthermore, both side-drawing components include electric push rods. The electric push rods are bolted to the middle of the lower template via U-shaped brackets. The output end of the electric push rod extends into the interior of the slide groove and is fixedly mounted with an installation block via a connecting block. Two symmetrically distributed first forming blocks are bolted to the middle of the end of the installation block away from the electric push rod. A second forming block is bolted to the upper end of the middle of the installation block, which is located between the two first forming blocks. Both of the ends of the two first forming blocks away from the installation block and the side that is close to each other are provided with arc-shaped grooves. The end of the second forming block away from the installation block is located between the two arc-shaped grooves.

[0011] Furthermore, both ends of the mounting block are integrally formed with guide portions, and the mounting block is slidably connected to the inside of the slide groove. The upper surface of the guide portion is slidably connected to the lower surface of the guide block. The bottom ends of the two first forming blocks are slidably connected to the inside of the guide groove. The end of the second forming block away from the mounting block is located inside the mating groove. The middle of both sides of the second forming block and the end away from the mounting block are provided with forming grooves. The bottom middle of the upper template is provided with a second receiving groove that matches the upper mold core and the mounting block. The middle of the end of the two first forming blocks near the arc groove is provided with oppositely arranged hole-removing components.

[0012] Furthermore, both perforation components include inserts, which are bolted to the inside of the first molding block, with the outer side of the insert flush with the outer side of the first molding block. Hollow cylinders are fixedly connected to the sides of the two inserts that are close to each other. A round rod is slidably connected to the middle of the cylinder, with both ends of the round rod extending to the outside of the cylinder and the outside of the insert, respectively. A round plate is fitted on the outer end of the round rod that is inside the cylinder, and the round plate is slidably connected to the inside of the cylinder. A spring is fitted on the outer end of the round rod that is between the round plate and the inner wall of the cylinder. The end of the round rod away from the insert slides through the first molding block and contacts the inner wall of the molding groove. The outer end of the round rod is slidably connected to the inclined groove.

[0013] Furthermore, an ejector assembly is provided between the two support plates. The ejector assembly includes two push plates, an ejector pin assembly, and a reset assembly. The ejector pin assembly includes two first ejector pins and multiple second ejector pins. The two first ejector pins and multiple second ejector pins are all installed between the two push plates. The tops of the two first ejector pins and the tops of the multiple second ejector pins pass through the push plate, the lower mold plate, the lower mold core, and the punch in sequence. The top of the first ejector pin is flush with the inner bottom wall of the mating groove, and the top of the second ejector pin is flush with the upper surface of the punch.

[0014] (3) Beneficial effects

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] This invention improves production efficiency by setting a first mold cavity and a punch with two stations on the upper and lower mold cores, and forming a product cavity with two side-pulling components. The demolding process adopts three demolding steps: the first is the separation of the upper and lower molds; the second is the demolding of the upper mold core and the lower mold core through the step hole demolding through the hole demolding component; the third is the demolding of the mounting block, the first forming block and the second forming block through the reset of the electric push rod and the separation of the punch; finally, the product is ejected by the ejector pin assembly, so as to achieve rapid demolding and ensure demolding efficiency and quality. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the finished structure of the camera body cover in this utility model;

[0018] Figure 2 This is a schematic diagram of the mold body structure in this utility model;

[0019] Figure 3 This is a schematic diagram of the main sectional view of the mold body in this utility model;

[0020] Figure 4 This is an exploded structural diagram of the mold body in this utility model;

[0021] Figure 5 This is a schematic diagram of the three-dimensional structure of the upper mold core in this utility model;

[0022] Figure 6 This is a three-dimensional structural diagram showing the connection between the lower template, lower mold core, and side pull assembly in this utility model;

[0023] Figure 7 This is a three-dimensional structural diagram of the connection between the lower template and the lower mold core in this utility model;

[0024] Figure 8 This is a three-dimensional structural diagram of the side-drawing component in this utility model;

[0025] Figure 9This is a cross-sectional view of the hole-removing component in this utility model.

[0026] The markings in the attached diagram are as follows: 1. Upper mold plate; 101. Fixing plate; 102. Top plate; 2. Lower mold plate; 201. Support plate; 202. Bottom plate; 203. Ejection assembly; 204. Slide groove; 205. Guide block; 3. Upper mold core; 301. First mold cavity; 302. Mounting groove; 303. Second mold cavity; 304. Annular forming part; 305. Inclined groove; 306. Side groove; 4. Lower mold core; 401. Punch; 402. Protrusion; 403. Mating groove; 404. Guide groove; 5. Side extraction assembly. Components; 501, Electric push rod; 502, Mounting block; 503, First forming block; 504, Arc groove; 505, Second forming block; 506, Forming groove; 6, Insert; 601, Cylinder; 602, Round rod; 603, Round plate; 604, Spring; 7, Ejector pin assembly; 701, First ejector pin; 702, Second ejector pin; 8, Gate; 801, Double-headed runner assembly; 9, Main body; 901, Protrusion; 902, Cylindrical; 903, Extension shell; 904, Groove; 905, Stepped hole. Detailed Implementation

[0027] This specific embodiment is an injection mold for the upper cover of a camera body, and its structural schematic diagram is shown below. Figures 1-9 As shown, the mold includes a mold body, which comprises an upper mold and a lower mold. The upper mold includes an upper template 1, a fixing plate 101, and a top plate 102. The lower mold includes a lower template 2, two support plates 201, a bottom plate 202, and an ejection assembly 203. An upper mold core 3 is bolted to the bottom of the upper template 1, and a lower mold core 4 is bolted to the top of the lower template 2. First mold cavities 301 are provided on both the left and right sides of the bottom of the upper mold core 3. Mounting grooves 302 are provided on the bottom of the upper mold core 3 and on the side of the two first mold cavities 301 that are far apart from each other. The mounting grooves 302 are connected to the first mold cavities 301. A second mold cavity 3 in an arc shape is provided in the middle of the inner top wall of the mounting groove 302. 03. The mounting groove 302 has inclined grooves 305 in the middle of both the front and rear sides. The upper surface of the lower mold core 4 has punches 401 integrally formed at the middle of both ends and the position corresponding to the first mold cavity 301. The upper middle of the two punches 401 on the side away from each other has a mating groove 403. The upper ends of the front and rear sides of the punches 401 have protrusions 402 integrally formed. The left and right sides of the lower template 2 are provided with side-pulling components 5 that mate with the punches 401 and the upper template 1. The upper mold core 3, lower mold core 4, punches 401, first mold cavity 301, second mold cavity 303, mating groove 403 and side-pulling components 5 form a cavity for producing products.

[0028] When the injection molding machine demolds after injection molding, the injection molding machine drives the lower mold to detach from the upper mold, thereby separating the upper mold core 3 from the lower mold core 4. At this time, the side of the two main bodies 9 that are close to each other, the top of the main body 9, the protrusion 901 and the cylinder 902 are exposed first. At the same time, during the separation of the upper mold core 3, the side pull assembly 5 can demold the stepped hole 905. Finally, the side pull assemblies 5 on both sides retract outward, thereby demolding the extension shell 903 of the main body 9.

[0029] In addition, a circular hole is provided in the middle of the inner top wall of the first mold cavity 301, and side grooves 306 are provided on both sides of the inner wall of the first mold cavity 301 and at one end near the mounting groove 302. An annular forming part 304 is bolted to the top of the upper mold core 3 and located inside the circular hole. A gate 8 is provided in the middle of the top of the top plate 102. A double-headed runner assembly 801 communicating with the gate 8 is installed in the middle of the top of the fixing plate 101. The bottom ends of the double-headed runner assembly 801 extend into the interior of the corresponding annular forming part 304. The use of the double-headed runner assembly 801 can simultaneously perform injection molding on two molding stations, improving production efficiency. At the same time, a cylindrical part 902 of the product can be formed between the annular forming part 304 and the circular hole.

[0030] In addition, the upper surface of the lower template 2 is provided with a first receiving groove in the middle that is adapted to the lower mold core 4. The middle of both the left and right ends of the lower template 2 is provided with a sliding groove 204 that is connected to the first receiving groove. The upper ends of the inner walls on both the front and rear sides of the sliding groove 204 are provided with clearances. A guide block 205 is bolted inside the clearance. The end of the guide block 205 away from the clearance extends into the interior of the sliding groove 204. The middle of both the left and right ends of the lower mold core 4 and the edge of the punch 401 are provided with guide grooves 404. The height of the guide grooves 404 is higher than the height of the sliding grooves 204.

[0031] In addition, both side-drawing components 5 include an electric push rod 501. The electric push rod 501 is bolted to the middle of the lower template 2 via a U-shaped bracket. The output end of the electric push rod 501 extends into the interior of the slide groove 204 and is fixedly mounted with an installation block 502 via a connecting block. Two symmetrically distributed first forming blocks 503 are bolted to the middle of the end of the installation block 502 away from the electric push rod 501. A second forming block 505 is bolted to the upper end of the middle of the installation block 502, located between the two first forming blocks 503. Both ends of the two first forming blocks 503 away from the installation block 502 and close to each other are provided with arc-shaped grooves 504. The end of the second forming block 505 away from the mounting block 502 is located between two arc-shaped grooves 504; a position sensor is installed on the edge of the lower template 2 to detect whether the upper template 1 and the lower template 2 are separated. When the upper template 1 and the lower template 2 are separated, the position sensor sends a signal to the external controller. The external controller controls the electric push rod 501 to retract and reset. The electric push rod 501 drives the mounting block 502 to move outward through the connecting block. The mounting block 502 drives the two first forming blocks 503 and the second forming block 505 on it to disengage from the punch 401 and the mating groove 403, thereby forming the main body 9 and the extension shell 903.

[0032] Furthermore, both ends of the mounting block 502 are integrally formed with guide portions. The mounting block 502 is slidably connected to the inside of the slide groove 204. The upper surface of the guide portion is slidably connected to the lower surface of the guide block 205. The bottom ends of the two first forming blocks 503 are slidably connected to the inside of the guide groove 404. The end of the second forming block 505 away from the mounting block 502 is located inside the mating groove 403. The middle of both sides of the second forming block 505 and the end away from the mounting block 502 are provided with forming grooves 506. The bottom middle of the upper template 1 is provided with a second receiving groove that matches the upper mold core 3 and the mounting block 502. Two first forming blocks 503 are provided with oppositely arranged hole-removing components at the middle of one end near the arc groove 504; the second forming block 505 is provided with a stepped groove forming the opening end of the extension shell 903 at the end away from the mounting block 502. The electric push rod 501 drives the mounting block 502 to slide between the slide groove 204 and the guide block 205 through the connecting block. The guide block 205 and the slide groove 204 can limit and guide the mounting block 502. The bottom of the second forming block 505 can slide in the guide groove 404. When the first forming block 503 separates from the punch 401, the other side of the main body 9 is exposed.

[0033] In addition, both punching components include inserts 6, which are bolted to the inside of the first molding block 503, with the outer side of insert 6 flush with the outer side of the first molding block 503. Hollow cylinders 601 are fixedly connected to the adjacent sides of the two inserts 6. A round rod 602 is slidably connected to the middle of the cylinder 601, with both ends of the rod 602 extending to the outside of the cylinder 601 and the outside of the insert 6, respectively. A round plate 603 is fitted onto the outer end of the rod 602, which is located inside the cylinder 601. The round plate 603 is slidably connected to the inside of the cylinder 601. A spring 604 is fitted onto the outer end of the rod 602, located between the round plate 603 and the inner wall of the cylinder 601. The end of the rod 602 away from the insert 6 slides through the first molding block 503 and contacts the inner wall of the molding groove 506. The outer end of the round rod 602 is slidably connected to the inclined groove 305. Under the action of the spring 604, the round plate 603 is always in contact with the inner wall of the cylinder 601, so that the outer end of the round rod 602 is always in contact with the inner wall of the inclined groove 305. When the mold is closed, the lower mold core 4 gradually contacts the upper mold core 3, so that the inclined groove 305 gradually squeezes the outer end of the round rod 602, so that the round rod 602 moves inward and drives the round plate 603 to squeeze the spring 604. Finally, the forming end of the round rod 602 contacts the inner wall of the forming groove 506. After injection molding, a stepped hole 905 is formed in this part. When the mold is opened, the upper mold core 3 and the lower mold core 4 separate. Under the action of the spring 604, the forming end of the round rod 602 is disengaged from the forming groove 506, so that the second forming block 505 can disengage from the mating groove 403.

[0034] In addition, an ejector assembly 203 is provided between the two support plates 201. The ejector assembly 203 includes two push plates, an ejector pin assembly 7, and a reset assembly. The ejector pin assembly 7 includes two first ejector pins 701 and multiple second ejector pins 702. The two first ejector pins 701 and multiple second ejector pins 702 are all installed between the two push plates. The top ends of the two first ejector pins 701 and the top ends of the multiple second ejector pins 702 pass through the push plates, the lower mold plate 2, the lower mold core 4, and the punch 401 in sequence. The top of the first ejector pin 701 is flush with the inner bottom wall of the mating groove 403, and the top of the second ejector pin 702 is flush with the upper surface of the punch 401. After the second molding block 505 separates from the mating groove 403, the injection molding machine controls the lower mold to continue moving, causing the ejector pin to push the push plate, which in turn drives the first ejector pin 701 and the second ejector pin 702 to move upward. The first ejector pin 701 can push the extension shell 903, and the second ejector pin 702 pushes the inner top wall of the main body 9 for demolding.

[0035] All technical features in this embodiment can be freely combined according to actual needs.

[0036] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A camera body upper cover injection mold, comprising a mold body, the mold body including an upper mold and a lower mold, the upper mold including an upper template (1), a fixing plate (101) and a top plate (102), the lower mold including a lower template (2), two support plates (201), a bottom plate (202) and an ejection assembly (203), characterized in that, An upper mold core (3) is bolted to the bottom of the upper template (1), and a lower mold core (4) is bolted to the top of the lower template (2). The upper mold core (3) has first mold cavities (301) on both the left and right sides of its bottom. The upper mold core (3) also has mounting grooves (302) on its bottom and on the side of the two first mold cavities (301) that are far apart from each other. The mounting grooves (302) are connected to the first mold cavities (301). A second mold cavity (303) in an arc shape is provided in the middle of the inner top wall of the mounting groove (302). The groove (302) has inclined grooves (305) in the middle of both the front and rear sides. The upper surface of the lower mold core (4) has punches (401) integrally formed at the middle of both ends and the position corresponding to the first mold cavity (301). The upper middle of the two punches (401) on the side away from each other has a mating groove (403). The upper ends of the front and rear sides of the punches (401) are integrally formed with protrusions (402). The lower template (2) has side-pulling components (5) that cooperate with the punches (401) and the upper template (1) on both the left and right sides.

2. The camera body upper cover injection mold of claim 1, wherein: The first mold cavity (301) has a round hole in the middle of the inner top wall. The inner walls of the first mold cavity (301) are provided with side grooves (306) on both sides and near the mounting groove (302). The top of the upper mold core (3) is bolted with an annular forming part (304) inside the round hole. The top of the top plate (102) is provided with a gate (8). The top of the fixing plate (101) is provided with a double-headed runner assembly (801) communicating with the gate (8). The bottom ends of the double-headed runner assembly (801) extend to the interior of the corresponding annular forming part (304).

3. The camera body upper cover injection mold of claim 2, wherein: The upper surface of the lower template (2) is provided with a first receiving groove that is adapted to the lower mold core (4). The middle of the left and right ends of the lower template (2) is provided with a sliding groove (204) that is connected to the first receiving groove. The upper end of the inner wall of the front and rear sides of the sliding groove (204) is provided with a clearance. A guide block (205) is bolted inside the clearance. The end of the guide block (205) away from the clearance extends into the interior of the sliding groove (204). The middle of the left and right ends of the lower mold core (4) and the edge of the punch (401) are provided with guide grooves (404). The height of the guide groove (404) is higher than the height of the sliding groove (204).

4. The camera body upper cover injection mold of claim 3, wherein: Both of the side-drawing components (5) include an electric push rod (501). The electric push rod (501) is bolted to the middle of the lower template (2) by a U-shaped frame. The output end of the electric push rod (501) extends into the interior of the slide groove (204) and is fixedly installed with an installation block (502) by a connecting block. Two symmetrically distributed first forming blocks (503) are bolted to the middle of the end of the installation block (502) away from the electric push rod (501). A second forming block (505) is bolted to the upper end of the middle of the installation block (502) between the two first forming blocks (503). An arc groove (504) is provided on the side of the two first forming blocks (503) away from the installation block (502) and close to each other. The end of the second forming block (505) away from the installation block (502) is located between the two arc grooves (504).

5. The camera body upper cover injection mold of claim 4, wherein: Both ends of the mounting block (502) are integrally formed with guide portions. The mounting block (502) is slidably connected to the inside of the slide groove (204). The upper surface of the guide portion is slidably connected to the lower surface of the guide block (205). The bottom ends of the two first molding blocks (503) are slidably connected to the inside of the guide groove (404). The end of the second molding block (505) away from the mounting block (502) is located inside the mating groove (403). The middle of both sides of the second molding block (505) and the end away from the mounting block (502) are provided with molding grooves (506). The middle of the bottom end of the upper template (1) is provided with a second receiving groove that is compatible with the upper mold core (3) and the mounting block (502). The middle of the end of the two first molding blocks (503) near the arc groove (504) is provided with oppositely arranged hole-removing components.

6. The camera body upper cover injection mold of claim 5, wherein: Both of the aforementioned hole-removing components include inserts (6), which are bolted to the inside of the first molding block (503), with the outer side of the insert (6) flush with the outer side of the first molding block (503). A hollow cylinder (601) is fixedly connected to the adjacent side of each of the two inserts (6). A round rod (602) is slidably connected to the middle of the cylinder (601), with both ends of the round rod (602) extending to the outside of the cylinder (601) and the outside of the insert (6), respectively. A circular plate (603) is fitted on the outer side of the cylinder (601) and located inside the cylinder (601). The circular plate (603) is slidably connected to the inside of the cylinder (601). A spring (604) is fitted on the outer side of the circular rod (602) and located between the circular plate (603) and the inner wall of the cylinder (601). The end of the circular rod (602) away from the insert (6) slides through the first forming block (503) and contacts the inner wall of the forming groove (506). The outer end of the circular rod (602) is slidably connected to the inclined groove (305).

7. The camera body upper cover injection mold of claim 6, wherein: An ejector assembly (203) is provided between the two support plates (201). The ejector assembly (203) includes two push plates, an ejector pin assembly (7), and a reset assembly. The ejector pin assembly (7) includes two first ejector pins (701) and a plurality of second ejector pins (702). The two first ejector pins (701) and the plurality of second ejector pins (702) are installed between the two push plates. The top ends of the two first ejector pins (701) and the top ends of the plurality of second ejector pins (702) pass through the push plate, the lower template (2), the lower mold core (4), and the punch (401) in sequence. The top end of the first ejector pin (701) is flush with the inner bottom wall of the mating groove (403), and the top end of the second ejector pin (702) is flush with the upper surface of the punch (401).

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