A quick ejection mechanism and ejection method for an injection molding vehicle lamp mold

Abstract

The present invention discloses a quick ejection mechanism and method for an injection molding headlight mold, and relates to the technical field of plastic injection molding. The ejection mechanism includes: an ejector pin, which is arranged inside a lower mold and can move up and down. A sleeve is arranged at one end of the ejector pin facing the cavity, and the sleeve is made of a heat-insulating flexible material; a gap is arranged between the upper mold core and the upper template, the upper template is arranged with a positioning tube, the upper mold core is arranged with a sleeve, the positioning tube extends to the inside of the sleeve, and the outer wall of the positioning tube extending to one end of the sleeve is spherical, and a support member is arranged inside the upper template, and the support end of the support member contacts the upper mold core and changes the offset angle of the upper mold core compared to the axis of the injection port. When ejecting the injection molded part, the present application avoids the problem of marks on the surface of the headlight due to the large ejection force of the ejector pin, and reduces the ejection force applied by the ejector pin to the surface of the headlight when demolding and ejecting, and combines the clamping and swinging of the top of the headlight.

Description

Technical Field

[0001] The invention relates to the technical field of plastic injection molding, in particular to a rapid ejection mechanism and an ejection method for an injection molding vehicle lamp mold. Background Art

[0002] The injection molding process of headlights mainly includes the following steps: material preparation, melting and injection, cooling and demoulding, finishing and inspection, and subsequent processing: subsequent processing, assembly, and quality inspection are carried out according to product requirements. The injection molding process can produce products with highly precise size and shape, ensuring the perfect match between the headlight housing and other components. With precision molds and optimized process control, the surface of the injection-molded headlight housing is smooth, without obvious flow marks or defects, meeting the aesthetic requirements.

[0003] Announcement No. CN110014557B discloses a mold ejection mechanism, including a shell, a top plate mechanism, a floating plate mechanism and a sliding structure. The sliding structure slides to a preset position in the process of resisting the floating plate mechanism. At the preset position, the resisting of the floating plate mechanism is released, so that the floating plate mechanism retracts under the action of a reset spring and drives the ejection device to retract together. The sliding structure set between the top plate mechanism and the floating plate mechanism in the shell of the application is used to be driven by the top plate mechanism to move toward the floating plate mechanism while being resisted in the opposite direction by the floating plate mechanism, so as to move horizontally toward the preset position. When the sliding structure moves horizontally to the preset position, the resisting of the floating plate mechanism can be released, so that the floating plate mechanism retracts under the action of the reset spring, thereby driving the ejection device to retract together, so that the ejection device is separated from the product.

[0004] The ejection methods of the existing ejection mechanism are basically divided into four types:

[0005] Ejector pin ejection: Use multiple ejectors to eject the molded lamp housing from the mold;

[0006] Push plate ejection: Especially suitable for lamp housings with larger areas, the push plate can evenly distribute the ejection force to avoid product deformation or damage;

[0007] Air ejection: Use compressed air to eject the lamp housing from the mold. This method is usually used for products that need to prevent scratches or have high surface requirements.

[0008] Cylinder ejection: The formed lamp housing is ejected through the hydraulic system, which is suitable for larger or complex products.

[0009] The ejection force of the ejector pin determines the demoulding effect of the mold. If the ejection force of the ejector pin is too large, it will cause surface marks on the product. If the ejector pins are unevenly arranged or the number of ejector pins is insufficient, it is easy to cause uneven ejection force, resulting in product deformation. The structure of the headlight is relatively complex. When the ejection force of the ejector pin is large, it will cause surface marks on the headlight. If the ejection force is small, the headlight cannot be ejected. Correspondingly, increasing the ejection force to reduce surface marks requires sufficient cooling of the headlight, resulting in reduced injection efficiency of the headlight. Summary of the invention

[0010] One of the purposes of the present invention is to provide a rapid ejection mechanism and method for an injection molding lamp mold, which can realize the ejection of the lamp injection molded part through a combined ejection method, reduce the ejection force while ensuring that the lamp can be demolded, avoid residual surface marks, and further improve the surface quality of the lamp.

[0011] To achieve the above objectives, the present invention is implemented through the following technical solutions: a quick ejection mechanism for an injection molding lamp mold, used for an injection molding lamp mold, the injection molding lamp mold comprises an upper mold and a lower mold, the upper mold and the lower mold respectively consist of an upper and lower fixing plate, an upper and lower template, and an upper and lower mold core, the middle of the upper and lower mold cores is a lamp cavity, the upper mold and the lower mold are connected and separable by a connecting piece, and the upper mold is provided with an injection port extending to the inside of the cavity;

[0012] The ejection mechanism includes:

[0013] An ejector pin is arranged inside the lower mold and can move up and down. One end of the ejector pin facing the cavity is provided with a sleeve head, which is made of a heat-insulating flexible material and contacts the surface of the lamp when ejecting the lamp injection molded part.

[0014] A gap is set between the upper mold core and the upper mold plate, the upper mold plate is equipped with a positioning tube, the upper mold core is equipped with a sleeve, the positioning tube extends to the inside of the sleeve, and the outer wall of the positioning tube extending to one end of the sleeve is spherical, the upper mold core can swing relative to the upper mold plate, the injection port passes through the positioning tube and the sleeve and is connected to the cavity, a support member is arranged inside the upper mold plate, and the support end of the support member contacts the upper mold core and changes the offset angle of the upper mold core compared to the injection port axis;

[0015] The clamping rod is arranged on the inner side of the positioning tube and can swing relative to the clamping rod. The inner side of the sleeve is arranged with an arc-shaped protrusion corresponding to the clamping rod. The arc-shaped protrusion changes the swinging angle of the clamping rod. The upper mold core can move up and down relative to the upper mold plate. When the upper mold core moves downward, the arc-shaped protrusion squeezes the clamping rod to clamp the water outlet in the sleeve.

[0016] In one or more embodiments of the present invention, the ejector pin extends from the lower fixed plate to the inside of the cavity, a fitting block is arranged inside the lower mold core, the fitting block contacts the lower mold core and forms the inner wall of the cavity, an extension frame is arranged inside the lower mold core, and the two ends of the extension frame are respectively connected to the fitting block and the lower mold core, when the extension frame is in an extended state, the fitting block contacts the lower mold core and the fitting block coincides with the inner wall of the cavity, and when the extension frame is in a contracted state, the fitting block is separated from the contact with the lower mold core, and the ejector pin can be extended.

[0017] In one or more embodiments of the present invention, the interior of the sleeve is arranged as a cavity, and the inner wall of the cavity is provided with reinforcing ribs, the reinforcing ribs change the extrusion state of the sleeve, the sleeve has a fitting portion arranged in a ring around the axis of the ejector pin, the fitting portion is a conical surface, the fitting portion is divided into an upper part and a lower part, the upper part and the lower part are arranged correspondingly, and the upper part and the lower part fit together when the sleeve is extruded.

[0018] In one or more embodiments of the present invention, the stretching frame comprises:

[0019] A first connecting frame is installed on the outside of the bonding block, and the bonding block is rotatably installed on the inside of the first connecting member;

[0020] The second connecting frame is installed inside the lower mold core and connected to the first connecting frame, and both the first connecting frame and the second connecting frame can swing relative to the lower mold core;

[0021] The positioning frame is slidably installed inside the lower mold core, and a guide groove is arranged inside the positioning frame. The first connecting frame extends into the inside of the guide groove. The guide groove is inclined. When the first connecting frame is at the upper end of the guide groove, the fitting block fits the lower mold core to form a cavity. When the first connecting frame is at the lower end of the guide groove, the ejector pin can be extended.

[0022] In one or more embodiments of the present invention, the first connecting frame and the second connecting frame are both provided with bayonet holes on their inner sides, the bayonet holes penetrate the first connecting frame and the second connecting frame, a clamping head is provided inside the lower mold core, when the first connecting frame and the second connecting frame are in a contracted state, the clamping head is inserted into the bayonet holes, an elastic body is provided at the end of the clamping head, the cross section of the elastic body is triangular, and the outer side of the bayonet holes at the first connecting frame is chamfered, and the chamfering size corresponds to the elastic body;

[0023] The top of the positioning frame contacts the upper die core and moves with the upper die core.

[0024] In one or more embodiments of the present invention, a top plate is arranged at the bottom of the ejector pin, the top plate is arranged on the inner side of the lower fixed plate, a plurality of return springs are arranged at the top, the two ends of the return springs contact the lower template and the ejector plate respectively, a pressure detection sensor is arranged between the ejector pin and the ejector plate, and the detection end of the pressure detection sensor is connected to the ejector pin and obtains the ejection force of the ejector pin;

[0025] The driving part is arranged between the top plate and the lower fixing plate and is used for changing the height position of the top plate.

[0026] In one or more embodiments of the present invention, the support member comprises:

[0027] The support rod is telescopically arranged inside the upper mold plate, the end of the support rod is spherical, and the upper mold core is provided with an annular groove at a position corresponding to the support rod, and the radius of the annular groove is greater than the spherical radius of the end of the support rod;

[0028] A positioning block is located inside the upper template and connected to the support rod. A slide groove is provided inside the upper template to limit the movement path of the positioning block.

[0029] The driving member is arranged at one end of the positioning block and is used for changing the telescopic position of the positioning block.

[0030] In one or more embodiments of the present invention, a positioning ring is arranged inside the upper template, the positioning ring can be rotatably arranged inside the upper template, and a limiting groove is arranged inside the positioning ring, the support rod extends into the limiting groove, and the limiting groove is arranged obliquely;

[0031] One end of the support rod in contact with the positioning block is configured in a spherical shape, and the support rod can swing relative to the positioning block;

[0032] The positioning ring rotates to change the tilt angle of the support rod.

[0033] In one or more embodiments of the present invention, a magnetic device is provided between the upper mold core and the upper mold plate, and an electromagnetic ring is arranged inside the upper mold plate. The electromagnetic ring magnetically attracts the upper mold core. When the electromagnetic ring magnetically attracts the upper mold core, the top of the upper mold core contacts the upper mold plate, and the upper mold core does not shake. After the electromagnetic ring is powered off, the top of the upper mold core detaches from the upper mold plate and can swing relative to the upper mold plate.

[0034] The embodiment of the present application also provides a mold rapid ejection method, which is used for the rapid ejection mechanism of the above-mentioned injection molding lamp mold, comprising the following steps:

[0035] The upper mold and the lower mold are combined through a connecting piece, and the injection material is injected into the cavity to form the injection molded part;

[0036] After cooling, the upper mold is separated from the lower mold, the ejector moves upward, the sleeve contacts the molded part and ejects the molded part outward;

[0037] The upper mold core moves downward, and the arc-shaped protrusion squeezes the clamp rod, which clamps the injection molding part's water outlet;

[0038] The support member supports the upper mold core to shift to different angles, assisting the injection molded part to escape from the cavity, and the ejector pin assists in ejecting the injection molded part.

[0039] Through the above technical solution, the present invention has the following beneficial effects:

[0040] 1. This application avoids the problem of marks on the surface of the headlight due to the strong ejection force of the ejector when ejecting the injection molded parts. When demolding and ejecting, the ejection force applied by the ejector to the surface of the headlight is reduced, and the clamping and swinging of the top of the headlight are combined to assist the ejector to eject the headlight, thereby avoiding residual marks on the surface of the headlight caused by ejection.

[0041] 2. By obtaining the ejection pressure of the ejector, determine whether the ejection of the ejector will leave traces on the surface of the headlight, and determine the position where the headlight is difficult to demold. By clamping the sprue, pull the headlight to change its tilt state and separate the headlight from the lower mold core to avoid the problem of residual traces on the headlight surface caused by using a larger ejection force when the ejection force is too small to eject the headlight.

[0042] 3. By setting the sleeve at the end of the ejector pin, it can be deformed during use, and has a larger contact area when contacting the injection molded part, so that the ejector can exert a greater ejection force. After the deformation, the strength of the sleeve can be stably guaranteed, further improving the stability of the ejection process.

[0043] 4. The residual traces on the surface of the headlights caused by the ejection force applied by the ejector pin are related to the ejection force and the cooling of the headlights. Therefore, reducing the ejection force can reduce the cooling time of the headlights inside the mold, thereby improving the efficiency of headlight injection molding.

[0044] Other features and advantages of the present invention will be described in the following description, and part of them will become obvious from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 A perspective view of the present invention;

[0046] Figure 2 This is a schematic diagram of removing the upper fixing plate of the present invention;

[0047] Figure 3 It is a schematic diagram of removing the upper template of the present invention;

[0048] Figure 4 It is a schematic diagram of removing the support member of the present invention;

[0049] Figure 5 It is a schematic diagram of removing the lower template of the present invention;

[0050] Figure 6 It is a schematic diagram of the position of the driving part and the top plate of the present invention;

[0051] Figure 7 It is a schematic diagram of the structure of the upper mold core and the lower mold core of the present invention;

[0052] Figure 8 This is a disassembled diagram of the lower mold core of the present invention;

[0053] Fig. 9 It is a cross-sectional plan view of the lower mold core of the present invention;

[0054] Fig.10 It is a schematic diagram of the stretching frame of the present invention;

[0055] Fig.11 It is a schematic diagram of the sleeve structure of the present invention;

[0056] Fig.12 It is a half-section view of the upper template of the present invention;

[0057] Fig.13 It is a bottom view of the support member and the upper mold core structure of the present invention;

[0058] Fig.14 It is a schematic diagram of the upper mold core of the present invention;

[0059] Fig.15 It is a cross-sectional plan view of the positioning tube and the sleeve of the present invention;

[0060] Fig.16 It is a cross-sectional view of the positioning tube and the sleeve of the present invention.

[0061] In the figure: 1 upper mold, 2 lower mold, 3 upper mold core, 4 lower mold core, 5 injection port;

[0062] 100 ejector pins, 200 sleeve heads, 300 gaps, 400 positioning tubes, 500 sleeves, 600 supports, 700 clamping rods, 800 arc protrusions, 900 electromagnetic rings;

[0063] 201 cavity, 202 reinforcing ribs, 203 fitting portion;

[0064] 31 fitting block, 32 stretching frame: 321 first connecting frame, 322 second connecting frame, 323 positioning frame, 324 guide groove, 325 bayonet, 326 clamp head, 327 elastic body;

[0065] 101 top plate, 102 return spring, 103 pressure detection sensor, 104 driving unit;

[0066] 601 support rod, 602 annular groove, 603 positioning block, 604 sliding groove, 605 driving member, 606 positioning ring, 607 limiting groove. DETAILED DESCRIPTION

[0067] The following will disclose multiple embodiments of the present invention with the accompanying drawings. For the purpose of clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present invention. In other words, in some embodiments of the present invention, these practical details are not necessary. And if it is possible to implement, the features of different embodiments can be applied interchangeably.

[0068] Unless otherwise defined, all words (including technical and scientific terms) used herein have their usual meanings, which can be understood by those familiar with this field. Furthermore, the definitions of the above words in commonly used dictionaries should be interpreted in the content of this specification as consistent with the meanings of the relevant fields of the present invention. Unless otherwise clearly defined, these words will not be interpreted as idealized or overly formal meanings.

[0069] The following is an explanation of the relationships and terms used in this application:

[0070] Parallel: The parallelism defined in this application is not limited to absolute parallelism. This definition of parallelism can be understood as basic parallelism, which allows for non-absolute parallelism due to factors such as assembly tolerance, design tolerance, and the influence of structural flatness. Small angular errors are allowed. For example, an assembly error range of less than 10 degrees can be understood as a parallel relationship.

[0071] Vertical: The verticality defined in this application is not limited to an absolute vertical intersection relationship (angle of 90 degrees). It allows for non-absolute vertical intersection relationships caused by factors such as assembly tolerance, design tolerance, and influence of structural flatness. It also allows for errors in a small angle range. For example, the assembly error range of 80 to 100 degrees can be understood as a vertical relationship.

[0072] The above explanation does not completely include the relationship definitions given in this application, but only represents part of it.

[0073] The invention provides a rapid ejection mechanism for an injection molding vehicle lamp mold, which is used in the vehicle lamp injection mold, and ejects the injection molded part after the vehicle lamp is injected, thereby shortening the cooling time of the vehicle lamp inside the mold and improving the ejection demoulding effect.

[0074] See also Figure 1-5 as well as Figure 15-16 As shown, in one embodiment, the ejection mechanism is used for a car lamp injection mold, which includes an upper mold 1 and a lower mold 2. The upper mold 1 and the lower mold 2 are respectively composed of upper and lower fixing plates, upper and lower mold plates, and upper and lower mold cores 4. The middle of the upper and lower mold cores 4 is a car lamp cavity. The upper mold 1 and the lower mold 2 are connected and separable by a connecting piece. The upper mold 1 is provided with an injection port 5 extending to the inside of the cavity.

[0075] The ejection mechanism includes:

[0076] The ejector pin 100 is disposed inside the lower mold 2 and can move up and down. The end of the ejector pin 100 disposed toward the cavity is provided with a sleeve 200. The sleeve 200 is made of a heat-insulating flexible material and contacts the surface of the lamp when ejecting the lamp injection molded part.

[0077] A gap 300 is set between the upper mold core 3 and the upper mold plate, the upper mold plate is equipped with a positioning tube 400, the upper mold core 3 is equipped with a sleeve 500, the positioning tube 400 extends to the inside of the sleeve 500, and the outer wall of the positioning tube 400 extending to one end of the sleeve 500 is spherical, the upper mold core 3 can swing relative to the upper mold plate, the injection port 5 passes through the positioning tube 400 and the sleeve 500 and is connected with the cavity, and a support member 600 is arranged inside the upper mold plate, and the support end of the support member 600 contacts the upper mold core 3 and changes the offset angle of the upper mold core 3 compared to the axis of the injection port 5;

[0078] The clamping rod 700 is arranged on the inner side of the positioning tube 400 and can swing relative to the clamping rod 700. The inner side of the sleeve 500 is arranged with an arc-shaped protrusion 800 corresponding to the clamping rod 700. The arc-shaped protrusion 800 changes the swing angle of the clamping rod 700. The upper mold core 3 can move up and down relative to the upper mold plate. When the upper mold core 3 moves downward, the arc-shaped protrusion 800 squeezes the clamping rod 700 to clamp the water outlet in the sleeve 500.

[0079] In one feasible method, after the injection molding of the headlight is completed, the upper mold 1 is detached by the swingable upper mold core 3, the sprue is clamped by the clamp rod 700, and the injection molded part is pulled by the swingable upper mold core 3, and the ejector pin 100 is assisted to exert an ejection force on the surface of the injection molded part, so that the injection molded part can be detached from the mold, the ejection force of the ejector pin 100 on the injection molded part is reduced, and the surface marks caused during the ejection process that affect the quality of the injection molded part are avoided.

[0080] Among them, a gap 300 is set between the upper mold core 3 and the upper mold plate, and the upper mold core 3 is supported by a support member 600 to change the inclination angle of the upper mold core 3. The gap 300 between the upper mold core 3 and the lower mold plate can facilitate the swing of the upper mold core 3, and the size of the gap 300 corresponds to the swingable angle range of the upper mold core 3. Changing the size of the gap 300 can adjust the swinging range of the upper mold core 3.

[0081] The setting of the clamping rod 700 can increase the clamping force for the injection molded part on the basis of fitting the sprue, and ensure the connection stability between the sprue and the upper mold core 3 when the inclination angle of the upper mold core 3 changes, thereby avoiding the sprue being separated from the upper mold core 3 during the swinging process, resulting in the problem that the injection molded part cannot be separated from the cavity.

[0082] See also Figure 6 as well as Figure 8-9As shown, in one embodiment, the ejector pin 100 extends from the lower fixed plate to the inside of the cavity, the lower mold core 4 is provided with a fitting block 31, the fitting block 31 contacts the lower mold core 4 and forms the inner wall of the cavity, the lower mold core 4 is provided with an extension frame 32, the two ends of the extension frame 32 are respectively connected to the fitting block 31 and the lower mold core 4, when the extension frame 32 is in an extended state, the fitting block 31 contacts the lower mold core 4 and the fitting block 31 coincides with the inner wall of the cavity, when the extension frame 32 is in a contracted state, the fitting block 31 is out of contact with the lower mold core 4, and the ejector pin 100 can be extended.

[0083] In one feasible manner, the sleeve 200 provided at the end of the ejector pin 100 can flexibly contact the injection molded part during ejection, thereby reducing the force on the injection molded part during the ejection process. The flexible setting of the sleeve 200 is used to increase the force-bearing area of ​​the injection molded part, thereby distributing the ejection force and further avoiding surface marks during the ejection process.

[0084] In order to ensure the surface integrity of the molded part during the injection molding process, the lower mold core 4 is tightly fitted by the fitting block 31 to form a complete cavity, thereby ensuring the injection molding integrity of the molded part.

[0085] See also Fig. 9 as well as Fig.11 As shown, in one embodiment, the interior of the sleeve 200 is provided with a cavity 201, and the inner wall of the cavity 201 is provided with reinforcing ribs 202, the reinforcing ribs 202 change the extrusion state of the sleeve 200, the sleeve 200 is provided with a fitting portion 203 in a ring shape with the axis of the ejector pin 100 as the center, the fitting portion 203 is a conical surface, and the fitting portion 203 is divided into an upper portion and a lower portion, the upper portion and the lower portion are provided correspondingly, and the upper portion and the lower portion fit together when the sleeve 200 is extruded.

[0086] In one feasible manner, reinforcing ribs 202 are arranged inside the cavity 201, and after extrusion, the strength of the sleeve 200 can be ensured. By utilizing the strength clamping of the reinforcing ribs 202, after the sleeve 200 is squeezed by the ejector pin 100 and the injection molded part, the contact area between the sleeve 200 and the injection molded part is increased, and the strength and stability of the sleeve 200 can also be ensured.

[0087] By utilizing the corresponding settings of the upper and lower parts of the fitting portion 203, the position of the sleeve 200 is ensured to be stable after being squeezed. Since the upper and lower parts are both inclined surfaces, the concentricity of the two inclined surfaces is utilized to ensure that the top and bottom surfaces of the sleeve 200 are parallel and coaxial.

[0088] See also Figure 8-10 As shown, in one embodiment, the stretching frame 32 includes:

[0089] The first connecting frame 321 is installed on the outside of the bonding block 31, and the bonding block 31 can be rotatably installed on the inside of the first connecting member;

[0090] The second connecting frame 322 is installed inside the lower mold core 4 and connected to the first connecting frame 321. Both the first connecting frame 321 and the second connecting frame 322 can swing relative to the lower mold core 4.

[0091] The positioning frame 323 is slidably installed inside the lower mold core 4. The inner side of the positioning frame 323 is provided with a guide groove 324. The first connecting frame 321 extends into the guide groove 324. The guide groove 324 is inclined. When the first connecting frame 321 is at the upper end of the guide groove 324, the bonding block 31 is bonded to the lower mold core 4 to form a cavity. When the first connecting frame 321 is at the lower end of the guide groove 324, the ejector pin 100 can be extended.

[0092] In one feasible method, the position of the first connecting frame 321 is controlled by using an inclined guide groove 324. Since the guide groove 324 is inclined, when the positioning frame 323 slides to different positions, the first connecting frame 321 is in different extension states, so that the positions of the first connecting frame 321 and the second connecting frame 322 are controlled according to the positioning frame 323, and the position of the bonding block 31 can be changed according to the states of the first connecting frame 321 and the second connecting frame 322.

[0093] See also Figure 9-10 As shown, in one embodiment, the inner sides of the first connecting frame 321 and the second connecting frame 322 are both provided with bayonet 325, the bayonet 325 penetrates the first connecting frame 321 and the second connecting frame 322, and the lower mold core 4 is provided with a clamp head 326. When the first connecting frame 321 and the second connecting frame 322 are in a contracted state, the clamp head 326 is inserted into the bayonet 325, and an elastic body 327 is provided at the end of the clamp head 326. The cross section of the elastic body 327 is triangular, and the outer side of the bayonet 325 at the first connecting frame 321 is chamfered, and the chamfer size corresponds to the elastic body 327;

[0094] The top of the positioning frame 323 contacts the upper mold core 3 and moves along with the upper mold core 3 .

[0095] Optionally, the top of the positioning frame 323 is magnetically set. When the upper mold core 3 moves upward, it drives the positioning frame 323 to move and change the height of the positioning frame 323. The height change of the positioning frame 323 utilizes the inclined guide groove 324 to change the state of the first connecting frame 321 and the second connecting frame 322, thereby controlling the bonding block 31.

[0096] Alternatively, a sealing ring is configured on the top of the positioning frame 323 and extends to the interior of the upper mold core 3. The demolding of the upper mold core 3 drives the positioning frame 323 to move. When the positioning frame 323 moves to the extreme position, the positioning frame 323 is separated from the upper mold core 3. Before the positioning frame 323 is separated from the upper mold core 3, the ejector pin 100 is extended, and the ejector pin 100 is used to limit the closing of the fitting block 31. Due to the connection between the clamp head 326 and the bayonet 325, the stability of the first connecting frame 321 and the second connecting frame 322 is further guaranteed, so as to avoid the first connecting frame 321 and the second connecting frame 322 being reset when the positioning frame 323 is separated from the upper mold core 3, and the sleeve 200 is squeezed when the ejector pin 100 retracts.

[0097] In one feasible method, the configuration of the clamp head 326 and the bayonet 325 can ensure the stability of the first connecting frame 321 and the second connecting frame 322 when the positioning frame 323 is out of contact with the upper mold core 3. When the injection molding work is performed again, since the upper mold core 3 will be in contact with the lower mold core 4, the positioning frame 323 will be squeezed, so that the swing force of the first connecting frame 321 and the second connecting frame 322 is greater than the force of the clamp head 326 elastomer 327 to limit the bayonet 325, thereby making the first connecting frame 321 and the second connecting frame 322 detach from the clamp head 326.

[0098] See also Figure 6-9 As shown, in one embodiment, a top plate 101 is arranged at the bottom of the ejector pin 100, and the top plate 101 is arranged on the inner side of the lower fixed plate. A plurality of return springs 102 are arranged on the top upper part, and the two ends of the return spring 102 contact the lower template and the ejector plate 101 respectively. A pressure detection sensor 103 is arranged between the ejector pin 100 and the ejector plate 101, and the detection end of the pressure detection sensor 103 is connected to the ejector pin 100 and obtains the ejection force of the ejector pin 100;

[0099] The driving unit 104 is disposed between the top plate 101 and the lower fixing plate, and is used to change the height position of the top plate 101 .

[0100] Optionally, the driving part 104 is a magnetic matrix, including an electromagnet and an ejection magnet. The electromagnet changes the magnetic force and cooperates with the ejection magnet to eject the top plate 101 outward.

[0101] Alternatively, the driving unit 104 is a servo motor that drives a cam to rotate, and the rotation of the cam supports the top plate 101 . The servo motor drives the cam to rotate to different positions to control the height of the top plate 101 .

[0102] In another embodiment, the driving unit 104 controls the height of the top plate 101 by hydraulic driving.

[0103] In one feasible method, a pressure detection sensor 103 is arranged between the ejector pin 100 and the ejector plate 101 to obtain the ejection force during the ejection process, and feedback is given on whether there will be marks on the surface of the injection molded part based on the ejection force. The fit between the injection molded part and the lower mold core 4 is determined based on the ejection force of different ejector pins 100, and the injection molded part is separated from the lower mold core 4 by swinging the upper mold core 3 based on the fit.

[0104] See also Figure 12-13 As shown, in one embodiment, the support member 600 includes:

[0105] The support rod 601 is telescopically arranged inside the upper mold plate, the end of the support rod 601 is spherical, and the upper mold core 3 is provided with an annular groove 602 at a position corresponding to the support rod 601, and the radius of the annular groove 602 is greater than the spherical radius of the end of the support rod 601;

[0106] The positioning block 603 is located inside the upper template and connected to the support rod 601. A slide groove 604 is provided inside the upper template, and the slide groove 604 is used to limit the movement path of the positioning block 603;

[0107] The driving member 605 is disposed at one end of the positioning block 603 and is used to change the telescopic position of the positioning block 603.

[0108] Optionally, the driving member 605 is a miniature telescopic rod, which is fixed on the inner side of the upper mold plate, and the telescopic end of the miniature telescopic rod is connected to the positioning block 603 and drives the positioning block 603 to move. The positioning block 603 pushes the support rod 601, and the positioning block 603 is used to change the swing angle of the upper mold core 3 at different positions of the annular groove, so that the injection molded part is out of contact with the inner wall of the cavity.

[0109] Alternatively, the driving member 605 is a hydraulic assembly, which changes the position of the positioning block 603 through hydraulic drive, so that the support rod 601 can push the upper mold core 3.

[0110] In one feasible method, the end of the support rod 601 is set to be spherical, and when in use, it can extend to the inside of the annular groove 602 to push the upper mold core 3 to swing. Since the upper mold core 3 needs to swing, the annular groove 602 and the end of the support rod 601 are both configured as arc surfaces, which can reduce the wear between the support rod 601 and the upper mold core 3.

[0111] See also Figure 12-14 As shown, in one embodiment, a positioning ring 606 is arranged inside the upper template, and the positioning ring 606 can be rotatably arranged inside the upper template, and a limiting groove 607 is arranged inside the positioning ring 606, and the support rod 601 extends into the limiting groove 607, and the limiting groove 607 is arranged obliquely;

[0112] One end of the support rod 601 that contacts the positioning block 603 is configured to be spherical, and the support rod 601 can swing relative to the positioning block 603;

[0113] The positioning ring 606 rotates to change the tilt angle of the support rod 601 .

[0114] In one feasible method, the positioning ring 606 is used to change the inclination angle of the support rod 601, which can change the contact position between the support rod 601 and the upper mold core 3. After changing the inclination angle, the support rod 601 can be tilted to support the upper mold core 3. By removing the upper fixed plate, the positioning ring 606 can be adjusted to rotate.

[0115] The positioning ring 606 is provided with a socket to facilitate adjustment of the rotation angle of the positioning ring 606 .

[0116] See also Fig.14 As shown, in one embodiment, a magnetic device is provided between the upper mold core 3 and the upper mold plate, and an electromagnetic ring 900 is arranged inside the upper mold plate. The electromagnetic ring 900 magnetically attracts the upper mold core 3. When the electromagnetic ring 900 magnetically attracts the upper mold core 3, the top of the upper mold core 3 contacts the upper mold plate, and the upper mold core 3 does not shake. After the electromagnetic ring 900 is powered off, the top of the upper mold core 3 is separated from the upper mold plate and can swing relative to the upper mold plate.

[0117] In another embodiment, a positioning rod is configured on the top of the upper mold core 3 and extends into the interior of the upper mold plate. The positioning rod includes a fixed portion and a flexible portion. The fixed portion extends into the interior of the upper mold plate. A hydraulic cavity is configured inside the upper mold plate. The fixed portion extends into the hydraulic cavity. The medium inside the hydraulic cavity changes the upper and lower positions of the fixed portion.

[0118] The hydraulic cavity is connected to the hydraulic unit to control the medium inside the hydraulic cavity. After the fixed part extends into the hydraulic cavity, the upper mold core 3 fits the upper mold plate to restrict the upper mold core 3, ensuring the stability of the upper mold core 3 and preventing the upper mold core 3 from shaking. The medium pushes the fixed part outward, causing the upper mold core 3 to move downward and break away from the contact with the upper mold plate, allowing the upper mold core 3 to swing.

[0119] In one feasible method, by controlling the upper mold core 3, the control of the arc-shaped protrusion 800 on the clamping rod 700 can be changed. When the upper mold core 3 is out of contact with the upper mold plate, the clamping rod 700 is out of the clamping of the water inlet, so that the injection molded part can be separated from the mold.

[0120] The embodiment of the present application also provides a mold rapid ejection method, which is used for the rapid ejection mechanism of the above-mentioned injection molding lamp mold, comprising the following steps:

[0121] The upper mold 1 and the lower mold 2 are combined through a connecting piece, and the injection material is injected into the cavity to form the injection molded part;

[0122] After cooling, the upper mold 1 is separated from the lower mold 2, the ejector pin 100 moves upward, and the sleeve 200 contacts the molded part and ejects the molded part outward;

[0123] The upper mold core 3 moves downward, and the arc-shaped protrusion 800 squeezes the clamping rod 700, and the clamping rod 700 clamps the injection molding nozzle;

[0124] The support member 600 supports the upper mold core 3 to be offset to different angles, and assists the injection molded part to be separated from the cavity, and the ejector pin 100 assists in ejecting the injection molded part.

[0125] Although the present invention is disclosed in conjunction with the above embodiments, it is not intended to limit the present invention. Anyone familiar with this technology can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the definition of the attached claims.

Claims

1. A quick ejection mechanism for an injection molding lamp mold, used for an injection molding lamp mold, the injection molding lamp mold comprises an upper mold and a lower mold, the upper mold and the lower mold respectively consist of an upper and lower fixing plate, an upper and lower mold plate, and an upper and lower mold core, the middle of the upper and lower mold cores is a lamp cavity, the upper mold and the lower mold are connected and separable by a connecting piece, and the upper mold is provided with an injection port extending to the inside of the cavity; the ejection mechanism comprises: An ejector pin is arranged inside the lower mold and can move up and down. One end of the ejector pin facing the cavity is provided with a sleeve head, which is made of a heat-insulating flexible material and contacts the surface of the lamp when ejecting the lamp injection molded part. The ejector extends from the lower fixed plate to the inside of the cavity. A fitting block is arranged inside the lower mold core. The fitting block contacts the lower mold core and forms the inner wall of the cavity. An extension frame is arranged inside the lower mold core. The two ends of the extension frame are respectively connected to the fitting block and the lower mold core. When the extension frame is in an extended state, the fitting block contacts the lower mold core and the fitting block overlaps with the inner wall of the cavity. When the extension frame is in a contracted state, the fitting block is separated from the contact with the lower mold core, and the ejector can be extended. The extension frame includes: A first connecting frame is installed on the outside of the bonding block, and the bonding block is rotatably installed on the inside of the first connecting member; The second connecting frame is installed inside the lower mold core and connected to the first connecting frame, and both the first connecting frame and the second connecting frame can swing relative to the lower mold core; The positioning frame is slidably installed inside the lower mold core, and a guide groove is arranged inside the positioning frame. The first connecting frame extends into the inside of the guide groove. The guide groove is inclined. When the first connecting frame is at the upper end of the guide groove, the fitting block fits the lower mold core to form a cavity. When the first connecting frame is at the lower end of the guide groove, the ejector pin can be extended. A gap is set between the upper mold core and the upper mold plate, the upper mold plate is equipped with a positioning tube, the upper mold core is equipped with a sleeve, the positioning tube extends to the inside of the sleeve, and the outer wall of the positioning tube extending to one end of the sleeve is spherical, the upper mold core can swing relative to the upper mold plate, the injection port passes through the positioning tube and the sleeve and is connected to the cavity, a support member is arranged inside the upper mold plate, and the support end of the support member contacts the upper mold core and changes the offset angle of the upper mold core compared to the injection port axis; The clamping rod is arranged on the inner side of the positioning tube and can swing relative to the clamping rod. The inner side of the sleeve is arranged with an arc-shaped protrusion corresponding to the clamping rod. The arc-shaped protrusion changes the swinging angle of the clamping rod. The upper mold core can move up and down relative to the upper mold plate. When the upper mold core moves downward, the arc-shaped protrusion squeezes the clamping rod to clamp the water outlet in the sleeve.

2. The rapid ejection mechanism for an injection molding vehicle lamp mold according to claim 1, characterized in that: The interior of the sleeve is a cavity, and the inner wall of the cavity is provided with reinforcing ribs, which change the extrusion state of the sleeve. The sleeve has a fitting portion arranged in a ring around the axis of the ejector pin, the fitting portion is a conical surface, and the fitting portion is divided into an upper part and a lower part, which are arranged correspondingly, and the upper part and the lower part fit together when the sleeve is extruded.

3. The rapid ejection mechanism for an injection molding vehicle lamp mold according to claim 2, characterized in that: The first connecting frame and the second connecting frame are both provided with bayonet holes on their inner sides, the bayonet holes penetrate through the first connecting frame and the second connecting frame, a clamping head is provided inside the lower die core, when the first connecting frame and the second connecting frame are in a contracted state, the clamping head is inserted into the bayonet holes, an elastic body is provided at the end of the clamping head, the cross section of the elastic body is triangular, and the outer side of the bayonet holes at the first connecting frame is chamfered, and the chamfering size corresponds to the elastic body; The top of the positioning frame contacts the upper die core and moves with the upper die core.

4. The rapid ejection mechanism for an injection molding vehicle lamp mold according to claim 3, characterized in that: An ejector plate is arranged at the bottom of the ejector pin, and the ejector plate is arranged on the inner side of the lower fixed plate. A plurality of return springs are arranged on the upper part of the top. The two ends of the return springs contact the lower template and the ejector plate respectively. A pressure detection sensor is arranged between the ejector pin and the ejector plate. The detection end of the pressure detection sensor is connected to the ejector pin and obtains the ejection force of the ejector pin. The driving part is arranged between the top plate and the lower fixing plate and is used for changing the height position of the top plate.

5. The rapid ejection mechanism for an injection molding vehicle lamp mold according to claim 4, characterized in that: The support components include: The support rod is telescopically arranged inside the upper mold plate, the end of the support rod is spherical, and the upper mold core is provided with an annular groove at a position corresponding to the support rod, and the radius of the annular groove is greater than the spherical radius of the end of the support rod; A positioning block is located inside the upper template and connected to the support rod. A slide groove is provided inside the upper template to limit the movement path of the positioning block. The driving member is arranged at one end of the positioning block and is used for changing the telescopic position of the positioning block.

6. The rapid ejection mechanism for an injection molding vehicle lamp mold according to claim 5, characterized in that: A positioning ring is arranged inside the upper template, and the positioning ring can be rotatably arranged inside the upper template, and a limiting groove is arranged inside the positioning ring, and the support rod extends into the limiting groove, and the limiting groove is arranged obliquely; One end of the support rod in contact with the positioning block is configured in a spherical shape, and the support rod can swing relative to the positioning block; The positioning ring rotates to change the tilt angle of the support rod.

7. The rapid ejection mechanism for an injection molding vehicle lamp mold according to claim 6, characterized in that: There is a magnetic setting between the upper die core and the upper mold plate. An electromagnetic ring is configured inside the upper mold plate. The electromagnetic ring magnetically attracts the upper die core. When the electromagnetic ring magnetically attracts the upper die core, the top of the upper die core contacts the upper mold plate and the upper die core does not shake. After the electromagnetic ring is powered off, the top of the upper die core is separated from the upper mold plate and can swing relative to the upper mold plate.

8. A method for ejecting a quick ejection mechanism, used for the quick ejection mechanism for an injection lamp mold as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: The upper mold and the lower mold are combined through a connecting piece, and the injection material is injected into the cavity to form the injection molded part; After cooling, the upper mold is separated from the lower mold, the ejector moves upward, the sleeve contacts the molded part and ejects the molded part outward; The upper mold core moves downward, and the arc-shaped protrusion squeezes the clamp rod, which clamps the injection molding part's water outlet; The support member supports the upper mold core to shift to different angles, assisting the injection molded part to escape from the cavity, and the ejector pin assists in ejecting the injection molded part.

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