Injection mold and injection device

Abstract

The application relates to the technical field of mold multi-color molding, and provides an injection mold and an injection device. The injection mold comprises a mold frame, a mold core and a plurality of water gap inserts. The mold frame is formed with a mold core cavity and an injection flow channel; the mold core is arranged in the mold core cavity; the mold core is formed with an injection cavity; the water gap insert is formed with a water gap flow channel; the water gap insert is used for mounting a to-be-sleeved part; the to-be-sleeved part and the injection cavity enclose a sleeving space; the sleeving space comprises a plurality of sleeving cavities which are isolated from each other; and the water gap flow channel of each water gap insert is communicated with the injection flow channel and at least one sleeving cavity. The injection mold provided by the application can realize the multi-color effect of a product surface by only setting a plurality of water gap inserts corresponding to different colors for secondary injection according to the multi-color requirements of the product, the multi-color yield of the product is high, the cost is lower, the injection process is simpler, the number of colors of the product subjected to multiple injection is not limited, and the injection process effect of more colors on the product surface can be realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mold multi-color molding, in particular to an injection mold and an injection device. BACKGROUND

[0002] The injection mold is a tool for producing plastic products and a tool for giving plastic products complete structure and accurate size. Injection molding is a processing method used when mass producing some complex-shaped parts. Specifically, it refers to injecting molten plastic into a mold cavity under high pressure by an injection molding machine, and obtaining a shaped product after cooling and solidification.

[0003] With the demand for displaying color diversification of the appearance of plastic products, in order to realize that the surface of the plastic product has multiple different colors, there are two ways in the traditional method. The first scheme is that the base material is the base color, and the color pigment is attached to the surface of the plastic base material by spraying process. The second scheme is to use a multi-color mold injection molding in a rotating manner.

[0004] However, in the first scheme, when the product surface multi-color is sprayed by spraying process, the area other than the color needs to be covered, so the difficulty of production is doubled for each additional color, and the yield of spraying is reduced by about 90% on the original basis for each additional color, so most products will constrain the number of color types for the same part. Moreover, the spraying process is more serious in environmental pollution and does not meet the environmental protection requirements.

[0005] If the second scheme is used, the mold rotation injection method is used to achieve this. This process can only achieve three color arrangements of a single structure due to the constraints of the injection molding machine, and the mold core of the rotating mold must be exactly the same, which limits the product features to be consistent on one side. SUMMARY

[0006] Therefore, the embodiments of the present application provide an injection mold and an injection device for realizing product multi-color, which is better than the traditional spraying method and the rotating injection method.

[0007] To achieve the above-mentioned purpose, the technical scheme of the embodiments of the present application is as follows:

[0008] In one aspect, the present application provides an injection mold, comprising:

[0009] a mold frame, which is formed with a mold core cavity and an injection flow channel;

[0010] a mold core, which is arranged in the mold core cavity; the mold core is formed with an injection cavity;

[0011] a plurality of water gap inserts, which are formed with water gap flow channels;

[0012] The sprue insert is used to install the part to be molded. The part to be molded and the injection cavity enclose a molding space. The molding space includes multiple mutually isolated molding cavities. The sprue channel of each sprue insert is connected to the injection channel and at least one molding cavity.

[0013] In some embodiments, the outer surface of the sprue insert is used to fit the die to be molded, and the outer surface of the die to be molded and the inner surface of the injection cavity enclose the molding space.

[0014] In some implementations, multiple sprue inserts may be selectively mounted on the die to be fitted, and the sprue channels of each sprue insert are connected to different die cavities.

[0015] In some embodiments, the mold frame includes:

[0016] The front mold has a front mold core groove and the injection runner;

[0017] The rear mold has a rear mold core groove, and the rear mold is located behind the front mold;

[0018] The injection mold has an injection position and an installation position. In the injection position, the front mold and the rear mold are closed, and the front mold core groove and the rear mold core groove surround to form the mold core cavity. In the installation position, the front mold is separated from the rear mold in the front-to-back direction.

[0019] In some embodiments, the mold core includes a front core block and a rear core block; the front core block is embedded in the front mold core groove and located on the front side of the part to be molded, and the rear core block is embedded in the rear mold core groove and located on the rear side of the part to be molded.

[0020] In some implementations, the front core block is detachably connected to the front mold, and the rear core block is detachably connected to the rear mold.

[0021] In some embodiments, the mold core includes a peripheral core block assembly, and the sprue insert includes a mounting portion and a feed portion located at one end of the mounting portion; the outer surface of the mounting portion is used to fit the die to be molded, the peripheral core block assembly and the feed portion are both embedded in the rear mold core groove and both surround the outer periphery of the die to be molded; the feed portion forms the inlet of the sprue channel, and the mounting portion forms the outlet of the sprue channel; in the injection position, the inlet communicates with the injection channel; the die to be molded, the front core block, the rear core block and the peripheral core block assembly together enclose the molding space.

[0022] In some embodiments, the injection mold comprises a pushing mechanism, which is capable of abutting against the peripheral core block assembly and the feeding portion to move the to-be-encased member out of the back mold core groove in the installation position.

[0023] In some embodiments, the pushing mechanism comprises a back seat and a pushing rod set; the back end of the pushing rod set is connected to the back seat, and the front end of the pushing rod set is slidably arranged in the back mold in the front-rear direction;

[0024] In the installation position, the back seat is capable of moving forward to drive the pushing rod set to extend forward and abut against the peripheral core block assembly and the feeding portion, and the to-be-encased member moves forward out of the back mold core groove;

[0025] In the injection position, the back seat is capable of moving backward to drive the pushing rod set to slide backward, so that the nozzle insert and the peripheral core block assembly encased with the to-be-encased member can be embedded in the back mold core groove.

[0026] In some embodiments, the peripheral core block assembly comprises a first side core located on the upper side of the to-be-encased member, a second side core located on the left side, and a third side core located on the right side; the feeding portion is located on the lower side of the to-be-encased member; in the installation position, the pushing rod set is capable of abutting against the first side core, the second side core, the third side core, and the feeding portion in the front-rear direction.

[0027] In some embodiments, the pushing mechanism comprises a guide rod set; the back end of the guide rod set is connected to the back seat, and the front end of the guide rod set is slidably arranged in the back mold in the front-rear direction, and the guide rod set is parallel to the pushing rod set and located outside the pushing rod set.

[0028] In some embodiments, the pushing mechanism comprises a resilient member, which abuts against the back mold and the back seat at both ends in the front-rear direction to provide a resilient force for the pushing rod set to retreat backward to the injection position.

[0029] In some embodiments, the injection mold comprises an adjusting screw arranged on the back seat, the screw end of the adjusting screw is threadedly connected to the back mold, and the stop end of the adjusting screw abuts against the back end face of the back seat.

[0030] In some embodiments, the nozzle insert comprises a nozzle bottom plate and a nozzle cover plate covering the nozzle bottom plate, and the nozzle bottom plate and the nozzle cover plate enclose to form the nozzle flow channel.

[0031] In some embodiments, the nozzle bottom plate and the nozzle cover plate are rotationally connected.

[0032] Another aspect of the present application provides an injection molding device, comprising the injection molding mold of any one of the above and a to-be-sleeved part; the to-be-sleeved part is mounted on the water gap insert.

[0033] The injection molding mold provided by the present application can realize the multi-color effect on the product surface by only setting multiple water gap inserts corresponding to different colors for secondary injection molding according to the multi-color requirement of the product. Compared with the color spraying process, the injection molding mold of the present application has clear edges between the multi-colors of the product after injection molding, and the multi-color product yield is high. Compared with the rotary injection molding method which requires higher mold precision and cost, the injection molding mold of the present application is not constrained by the injection molding machine and the structure features of the injection molded product are not constrained by the single-sided consistency. In addition, the injection molding mold does not need to set a rotary mold core, has lower cost, and the injection molding process is simpler. Moreover, the number of colors for multiple injection molding of the product is not limited, and the injection molding process effect of more colors on the product surface can be realized. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 FIG. 1 is a structural schematic diagram of an injection molding mold according to an embodiment of the present application;

[0035] Figure 2 FIG. 2 is another view of the structure shown in FIG. 1; Figure 1

[0036] Figure 3 FIG. 4 is an exploded view of the structure shown in FIG. 1; Figure 1

[0037] Figure 4 FIG. 5 is a structural schematic diagram of the structure shown in FIG. 1 in an installed position, which schematically shows the state when the push mechanism does not push the peripheral side core block assembly and the feeding part; Figure 1

[0038] Figure 5 FIG. 6 is a structural schematic diagram of the structure shown in FIG. 1 in an installed position, which schematically shows the state when the push mechanism pushes out the peripheral side core block assembly and the feeding part; Figure 1

[0039] Figure 6 FIG. 7 is another view of the structure shown in FIG. 1; Figure 1

[0040] Figure 7 FIG. 8 is an A-A sectional view of the structure shown in FIG. 1; Figure 6

[0041] Figure 8 FIG. 9 is an enlarged view of B of the structure shown in FIG. 1; Figure 7

[0042] Figure 9 ​​​​​​​Structure schematic view of the to-be-sleeved part of an embodiment of the present application; wherein the state of not being subjected to secondary injection molding is schematically shown;

[0043] Figure 10 Structure schematic view of the to-be-sleeved part of an embodiment of the present application; wherein the state of not being subjected to secondary injection molding is schematically shown;

[0044] Figure 11 Structure schematic view of the to-be-sleeved part of an embodiment of the present application; wherein the state of not being subjected to secondary injection molding is schematically shown; Figure 1 Structure schematic view of one of the water gap inserts of the structure shown;

[0045] Figure 12 Structure schematic view of the to-be-sleeved part of an embodiment of the present application; wherein the state of not being subjected to secondary injection molding is schematically shown; Figure 11 Structure schematic view of the to-be-sleeved part of an embodiment of the present application; wherein the state of not being subjected to secondary injection molding is schematically shown;

[0046] Figure 13 Structure schematic view of the to-be-sleeved part of an embodiment of the present application; wherein the state of not being subjected to secondary injection molding is schematically shown; Figure 11 Structure schematic view of the to-be-sleeved part of an embodiment of the present application; wherein the state of not being subjected to secondary injection molding is schematically shown.

[0047] Legend of reference signs:

[0048] Injection molding mold 100; mold frame 1; injection molding flow channel 1a; mold core cavity 1b; front mold 11; front mold core groove 11a; rear mold 12; rear mold core groove 12a; ejecting hole 12b; guide hole 12c; nozzle 111; mold core 2; injection molding cavity 2a; sleeving space 2b; sleeving cavity 2ba; ejecting blind hole 2c; front side core block 21; rear side core block 22; circumferential side core block assembly 23; first side core 231; second side core 232; third side core 233; water gap insert 3; water gap flow channel 3a; mounting part 31; discharge port 31a; feeding part 32; feeding port 32a; water gap bottom plate 33; rear water gap groove 33a; first adapter part 33b; water gap cover plate 34; front water gap groove 34a; second adapter part 34b; water gap 35; ejecting mechanism 4; rear seat 41; first seat plate 411; second seat plate 412; ejecting rod group 42; guide rod group 43; elastic member 44; adjusting bolt 5; alignment structure 6; to-be-sleeved part 900; mounting port 900a; communication port 900b; mounting cavity 900c. DETAILED DESCRIPTION

[0049] It should be noted that each embodiment / implementation provided by the present application can be combined with each other without contradiction. The detailed description in the specific implementation should be understood as an explanation of the purpose of the present application, and should not be regarded as an improper limitation of the present application.

[0050] In the description of the present application, the terms "upper", "lower", "left", "right", "front", "rear" orientation are based on the attached drawings. Figure 1 to the attached Figure 3The orientation of the presented figures. It should be understood that these orientation terms are used only to facilitate the description of the application and simplify the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application. The terms "first / second / third" are only to distinguish different objects, and do not indicate that there is the same or a relationship between the two.

[0051] The present application provides an injection mold 100, please refer to Figures 1 to 8 , including a mold frame 1, a mold core 2 and a plurality of water inlet inserts 3.

[0052] The mold frame 1 is formed with a mold core cavity 1b and an injection flow channel 1a. Specifically, the mold frame 1 corresponds to the skeleton of the injection mold 100, which is used to install other structural parts of the injection mold 100. The mold core 2 is arranged in the mold core cavity 1b, and the mold core 2 is formed with an injection cavity 2a. Specifically, the mold core cavity 1b of the mold frame 1 is used to carry the mold core 2, and the injection cavity 2a is used to pour the injection material, so that the product is injection molded.

[0053] The water inlet insert 3 is formed with a water inlet flow channel 3a. The water inlet insert 3 is used to install the to-be-coated part 900, and the to-be-coated part 900 and the injection cavity 2a enclose a coating space 2b. Specifically, the to-be-coated part 900 is a product that needs to be injection molded twice, and the second injection is performed on the surface of the to-be-coated part 900, which can improve the appearance level and texture of the product. The injection material can flow into the coating space 2b and solidify on the outer surface of the to-be-coated part 900.

[0054] The coating space 2b includes a plurality of mutually isolated coating cavities 2ba, and the water inlet flow channel 3a of each water inlet insert 3 communicates the injection flow channel 1a and at least one coating cavity 2ba. The plurality of coating cavities 2ba are not communicated with each other. The injection material in each coating cavity 2ba cannot flow into each other. Specifically, according to the different colors of the to-be-coated part 900 that need to be injection molded twice, the coating space 2b can be divided into a plurality of mutually isolated coating cavities 2ba, and each coating cavity 2ba can be injection molded with the same color or different colors as needed. The water inlet flow channel 3a of each water inlet insert 3 is used to guide the injection material of the same color in the injection flow channel 1a into one or more coating cavities 2ba that need to be injection molded with the same color.

[0055] That is, the present application sets multiple water inlet inserts 3, each of which corresponds to a different color of injection molding raw material. After the multiple water inlet inserts 3 are installed on the to-be-coated part 900, the injection molding raw material first flows into the water inlet flow channel 3a of the water inlet insert 3 through the injection flow channel 1a, and then is guided into one or more coating cavities 2ba of the corresponding color from the water inlet flow channel 3a, so as to realize the secondary injection molding of multiple colors of the to-be-coated part 900. The number of water inlet inserts 3 is set according to the number of colors required by the product, thereby meeting the demand of the product for multi-color appearance effect.

[0056] The injection mold 100 provided by the present application can realize the multi-color effect on the surface of the product by setting multiple water inlet inserts 3 corresponding to different colors for secondary injection molding according to the multi-color demand of the product. Compared with the color spraying process, the injection mold 100 of the present application has clear edges between the multiple colors of the product after injection molding, and the yield of the multi-color product is high. Compared with the rotary injection molding method which requires higher mold precision and cost, the injection mold 100 of the present application is not constrained by the injection molding machine and the structure of the injection molded product, and does not need to set a rotary mold core 2, thereby having lower cost and simpler injection molding process. Moreover, the number of colors for multiple injection molding of the product is not limited, and the injection molding process effect of more colors on the surface of the product can be realized.

[0057] In an embodiment, referring to Figure 3 , the mold frame 1 includes a front mold 11 and a rear mold 12. The front mold 11 is formed with a front mold core groove 11a and an injection flow channel 1a. The rear mold 12 is formed with a rear mold core groove 12a, and the rear mold 12 is located behind the front mold 11.

[0058] The injection mold 100 has an injection position and an installation position. In the injection position, the front mold 11 is combined with the rear mold 12, and the front mold core groove 11a and the rear mold core groove 12a form a mold core cavity 1b. In the installation position, the front mold 11 is separated from the rear mold 12 along the front-rear direction. That is, in the installation position, the front mold 11 moves forward relative to the rear mold 12 and is separated from the rear mold 12 along the front-rear direction, so as to install the to-be-coated part 900 which has not been subjected to secondary injection molding, or to take out the product which has been subjected to secondary injection molding. In the injection position, the front mold 11 moves backward relative to the rear mold 12 until it abuts against the front end face of the rear mold 12, and the front mold 11 is combined with the rear mold 12, so as to perform secondary injection molding on the to-be-coated part 900. The mold core cavity 1b is formed by the combination of the front mold core groove 11a and the rear mold core groove 12a. In the state that the front mold 11 is separated from the rear mold 12, the mold core 2 can be first partially installed in the front mold core groove 11a or the rear mold core groove 12a, and then completely embedded in the mold core cavity 1b after the front mold 11 is combined with the rear mold 12.

[0059] To ensure that the structural size precision of the product after injection molding meets the requirements, the machining precision of the injection cavity 2a is generally required to be high, and the mold core 2 is arranged in the mold frame 1 in the application, which can avoid direct injection molding on the front mold 11 and the rear mold 12, can reduce the manufacturing difficulty of the front mold 11 and the rear mold 12, and the structural size of the mold core 2 is relatively smaller than that of the mold frame 1. By machining the injection cavity 2a on the mold core 2, the manufacturing process difficulty is reduced, and when each structural part of the mold core 2 is damaged or other precision is reduced during use, only the mold core 2 needs to be replaced, which greatly reduces the mold manufacturing cost.

[0060] Because in the rotary injection molding process, the product realized by the conventional double-color or triple-color process still has the problem of residual gate defects on the appearance surface. To solve the above problem, in an embodiment, please refer to Figures 3 to 5 、 Figures 7 to 13 The outer surface of the water gap insert 3 is used to sleeve the sleeve part 900, and the outer surface of the sleeve part 900 and the inner surface of the injection cavity 2a enclose the sleeve space 2b. Specifically, the sleeve part 900 has a shell structure with an installation cavity 900c inside, and the sleeve part 900 is formed with an installation port 900a and a communication port 900b which communicate with the installation cavity 900c. The water gap insert 3 is removably arranged in the installation cavity 900c through the installation port 900a, and the communication port 900b communicates the water gap 3a and the sleeve cavity 2ba at the injection position.

[0061] That is, the sleeve part 900 is provided with the installation port 900a for sleeving the water gap insert 3, and when the water gap insert 3 is sleeved in the installation cavity 900c through the installation port 900a, the water gap 3a is located inside the sleeve part 900, so that the injection material can be communicated from the inside of the sleeve part 900 through the communication port 900b with the sleeve space 2b located on the outer surface of the sleeve part 900, and the inside of the sleeve part 900 is realized. By feeding injection. Therefore, after the product is injection molded and solidified, the gate of the product after injection molding is located at the communication port 900b, that is, on the inner surface of the product, and there is no gate residual defect on the outer surface of the product, which greatly improves the appearance quality of the product and the competitiveness of the product.

[0062] In the implementation, the product can be injection molded in multiple colors at the same time or separately.

[0063] In the case of simultaneous injection molding, a plurality of water gap inserts 3 are simultaneously installed on the sleeve part 900 through the installation port 900a, each water gap insert 3 corresponds to a different color, and the water gap 3a of each water gap insert 3 simultaneously injects into the respective sleeve cavity 2ba through the communication port 900b.

[0064] In the case of separate injection molding, in an embodiment, please refer to Figures 3 to 5, multiple water gate inserts 3 can be selectively installed in the to-be-encased part 900, and the water gate flow channels 3a of each water gate insert 3 are communicated with different water gate cavities 2ba. That is, the water gate flow channels 3a of each water gate insert 3 are communicated with different water gate cavities 2ba. That is, each time of injection molding, a water gate insert 3 corresponding to a color is arranged in the to-be-encased part 900, and each water gate insert 3 corresponds to a different color of injection material. For example, after the water gate insert 3 for the first color is installed in the to-be-encased part 900, the injection material first flows into the water gate flow channel 3a of the water gate insert 3 through the injection flow channel 1a, and then is guided into one or more water gate cavities 2ba corresponding to the first color through the water gate flow channel 3a, so as to realize the secondary injection molding of the to-be-encased part 900 in the first color. Subsequently, the front mold 11 and the rear mold 12 are separated and opened, the water gate insert 3 for the second color is replaced and installed in the to-be-encased part 900, and the water gate flow channel 3a of the water gate insert 3 is guided into one or more water gate cavities 2ba corresponding to the second color according to the same process, so as to realize the secondary injection molding of the to-be-encased part 900 in the second color. In this way, as many water gate inserts 3 as the number of colors required by the product are arranged, so as to meet the demand of the product for multi-color appearance effect.

[0065] In an embodiment, referring to Figures 3 to 8 , the mold core 2 includes a front side core block 21 and a rear side core block 22. The front side core block 21 is embedded in the front mold core groove 11a and located at the front side of the to-be-encased part 900, and the rear side core block 22 is embedded in the rear mold core groove 12a and located at the rear side of the to-be-encased part 900. That is, in order to facilitate the installation and disassembly of the to-be-encased part 900 in the injection cavity 2a, the mold core 2 is composed of multiple core blocks, including the front side core block 21 and the rear side core block 22. The front side core block 21 is used to surround the front side of the to-be-encased part 900 and jointly form the water gate cavity 2ba located at the front side of the to-be-encased part 900 with the front side surface of the to-be-encased part 900. The rear side core block 22 is used to surround the rear side of the to-be-encased part 900 and jointly form the water gate cavity 2ba located at the rear side of the to-be-encased part 900 with the rear side surface of the to-be-encased part 900.

[0066] In an embodiment, referring to Figure 5 and Figure 7 , the front side core block 21 is detachably connected with the front mold 11, and the rear side core block 22 is detachably connected with the rear mold 12. The detachable connection mode of the front side core block 21 and the front mold 11 is not limited, including but not limited to clamping and / or threaded connection and the like. Similarly, the detachable connection mode of the rear side core block 22 and the rear mold 12 is not limited, including but not limited to clamping and / or threaded connection and the like. For example, the front side core block 21 and the rear side core block 22 are respectively detachably fixed and embedded in the front mold core groove 11a of the front mold 11 and the rear mold core groove 12a of the rear mold 12 through screws.

[0067] In this way, on the one hand, the front mold core groove 11a and the rear mold core groove 12a can follow the front mold 11 and the rear mold 12, respectively, to move synchronously after installation, facilitating mold opening and closing. On the other hand, the detachable connection mode also facilitates the replacement of the front side core block 21 and the rear side core block 22 that are damaged.

[0068] In an embodiment, referring to Figures 3 to 12 , the mold core 2 comprises a peripheral side core block assembly 23. The nozzle insert 3 comprises a mounting portion 31 and a feeding portion 32 located at one end of the mounting portion 31. The outer surface of the mounting portion 31 is used to sleeve the sleeve part 900, and the peripheral side core block assembly 23 and the feeding portion 32 are both embedded in the rear mold core groove 12a and both surround the outer peripheral side of the sleeve part 900. Specifically, in order to facilitate the installation and removal of the sleeve part 900 in the injection cavity 2a, the mold core 2 further comprises a peripheral side core block assembly 23 surrounding the outer periphery of the sleeve part 900; and together with the peripheral side surface of the sleeve part 900, forms a sleeve cavity 2ba located at the peripheral side of the sleeve part 900. At the same time, the nozzle insert 3 is divided into two parts. Among them, the mounting portion 31 of the nozzle insert 3 extends into the mounting cavity 900c of the sleeve part 900 through the mounting port 900a, and the feeding portion 32 of the nozzle insert 3 is located at one end of the mounting portion 31 and outside the mounting cavity 900c.

[0069] The feeding portion 32 forms a feeding port 32a of the nozzle runner 3a, and the mounting portion 31 forms a discharging port 31a of the nozzle runner 3a. At the injection position, the feeding port 32a communicates with the injection runner 1a. That is, the nozzle runner 3a is always contained in the nozzle insert 3, wherein the feeding port 32a of the nozzle runner 3a is located on the feeding portion 32 outside the mounting cavity 900c, so that the feeding port 32a can directly dock the injection runner 1a, and the discharging port 31a of the nozzle runner 3a is located on the mounting portion 31 inside the mounting cavity 900c, so that the discharging port 31a can directly dock the communication port 900b, realizing the communication of the sleeve cavity 2ba from the inside of the sleeve part 900. The sleeve part 900, the front side core block 21, the rear side core block 22 and the peripheral side core block assembly 23 jointly surround to form a sleeve space 2b.

[0070] In an embodiment, referring to Figures 3 to 8 , the front mold 11 is configured with a nozzle 111, and the nozzle 111 forms an injection runner 1a. The nozzle 111 is replaceably arranged on the main body of the front mold 11. At the injection position, the injection raw material first enters the injection runner 1a through the barrel of the nozzle 111, and then flows from the injection runner 1a into the feeding port 32a of the nozzle insert 3.

[0071] In an embodiment, referring to Figures 1 to 7The injection mold 100 includes an ejector mechanism 4. In the installed position, the ejector mechanism 4 can abut against the peripheral core assembly 23 and the feed section 32 to move the die-cast part 900 out of the rear mold core groove 12a. The ejector mechanism 4 facilitates the installation of the die-cast part 900 and the disassembly of the product after injection molding.

[0072] For example, in one embodiment, see Figures 1 to 7 The push mechanism 4 includes a rear seat 41 and a push rod assembly 42. The rear end of the push rod assembly 42 is connected to the rear seat 41, and the front end of the push rod assembly 42 is slidably inserted into the rear mold 12 in the front-rear direction. Specifically, the push rod assembly 42 has multiple push rods extending in the front-rear direction. The rear seat 41 includes a first seat plate 411 and a second seat plate 412 fixedly connected to the rear end face of the first seat plate 411. The rear mold 12 has a push hole 12b communicating with the rear mold core groove 12a. The front end of the push rod is inserted into the push hole 12b, and the rear end of the push rod is clamped in the first seat plate 411 and the second seat plate 412 and can slide synchronously with the rear seat 41 in the front-rear direction.

[0073] In the installation position, the rear seat 41 can move forward to drive the push rod assembly 42 to extend forward and abut against the peripheral core block assembly 23 and the feeding part 32, so that the part to be molded 900 moves forward out of the rear mold core groove 12a. Specifically, after the product injection molding is completed, the injection molded product will form an integral whole with the front core block 21, the rear core block 22, the peripheral core block assembly 23 and the feeding part 32; after the injection molding material solidifies, the front mold 11 and the rear mold 12 open to the installation position, the front core block 21 moves synchronously with the front mold 11 in a direction away from the rear mold 12, the front core block 21 separates from the injection molded product, and then the push mechanism 4 abuts against the peripheral core block assembly 23 and the feeding part 32 located on the periphery of the part to be molded 900 in the front-back direction. At this time, the rear core block 22 separates from the injection molded product, and the injection molded product moves out of the rear mold core groove 12a together with the pushed peripheral core block assembly 23 and the feeding part 32.

[0074] In the injection position, the rear seat 41 can move backward to drive the push rod assembly 42 to slide backward, so that the sprue insert 3 and the peripheral core block assembly 23, which are fitted with the part to be molded 900, can be embedded in the core groove 12a of the rear mold. Specifically, when it is necessary to inject the part to be molded 900, the rear seat 41 can move backward to drive the push rod assembly 42 to slide backward, and then the sprue insert 3 and the peripheral core block assembly 23, which are fitted with the molded part, are embedded in the core groove 12a of the rear mold. Then the front mold 11 and the rear mold 12 are closed to the injection position, and the injection material is introduced from the nozzle 111 for injection.

[0075] The fixing connection method of the first plate 411 and the second plate 412 is not limited, including but not limited to snap-fit, screw connection, bolt connection, welding, etc.

[0076] In an embodiment, please refer to Figure 3 , the peripheral side core block assembly 23 includes a first side core 231 located on the upper side of the sleeve part 900, a second side core 232 located on the left side, and a third side core 233 located on the right side; the feeding part 32 is located on the lower side of the sleeve part 900; in the installation position, the ejector rod set 42 can simultaneously abut against the first side core 231, the second side core 232, the third side core 233, and the feeding part 32 in the front-rear direction. That is, in order to facilitate the installation and removal of the sleeve part 900 in the injection cavity 2a, the peripheral side core block assembly 23 includes the first side core 231, the second side core 232, and the third side core 233. The first side core 231, the second side core 232, and the third side core 233, together with the upper side surface, the left side surface, and the right side surface of the sleeve part 900, form a sleeve cavity 2ba located on the peripheral side of the sleeve part 900. Among them, the lower side of the sleeve part 900 is the installation port 900a, and the installation part 31 of the water gap insert 3 extends into the installation cavity 900c from the lower side through the installation port 900a, and the feeding part 32 is located below the installation part 31.

[0077] For example, in an embodiment, please refer to Figure 3 , Figure 7 and Figure 8 , the first side core 231, the second side core 232, the third side core 233, and the installation part 31 are all provided with an ejector blind hole 2c, and the ejector rod can be inserted into the ejector blind hole 2c. The ejector blind hole 2c can play a guiding role, ensuring that the ejector rod set 42 moves in the front-rear direction when ejecting, avoiding jamming when moving.

[0078] In order to ensure the accurate splicing and alignment of each core block of the mold core 2, the front side core block 21, the rear side core block 22, the first side core 231, the second side core 232, the third side core 233, and the feeding part 32 are all provided with an alignment structure 6. In order to ensure the accurate splicing when the front mold 11 and the rear mold 12 are closed, the alignment structure 6 is also provided on the closing surface of the front mold 11 and the rear mold 12.

[0079] The form of the alignment structure 6 includes but is not limited to the boss structure or the recess structure that are mutually embedded at the splicing of each component.

[0080] In an embodiment, please refer to Figures 1 to 7 , the ejecting mechanism 4 includes a guide rod set 43. The rear end of the guide rod set 43 is connected to the rear seat 41, the front end of the guide rod set 43 is slidably arranged in the rear mold 12 in the front-rear direction, and the guide rod set 43 is parallel to the ejector rod set 42 and located on the outer side of the ejector rod set 42. On the one hand, the guide rod set 43 can play a guiding role in the process of sliding the ejector rod set 42 with the rear seat 41. On the other hand, the guide rod set 43 is located on the outer side of the ejector rod set 42, and the overturning moment offset in the sliding direction when sliding is smaller, thereby ensuring the smoothness of the guidance.

[0081] Specifically, the guide rod set 43 comprises a plurality of guide rods extending in the front-rear direction. The rear mold 12 is formed with guide holes 12c extending in the front-rear direction, the front ends of the guide rods slidingly passing through the guide holes 12c, and the rear ends of the guide rods being clamped in the first seat plate 411 and the second seat plate 412 and being able to slide synchronously with the rear seat 41 in the front-rear direction. For example, the rear seat 41 is a cuboid structure, the number of guide rods is four, and the guide rods are arranged at the four corners of the rear seat 41, respectively.

[0082] In an embodiment, referring to Figures 1 to 7 , the pushing mechanism 4 comprises elastic members 44, the two ends of the elastic members 44 in the front-rear direction abutting against the rear mold 12 and the rear seat 41, respectively, to provide elastic force for the pushing rod set 42 to retreat to the injection position. The arrangement of the elastic members 44 can facilitate the pushing mechanism 4 to automatically return to the injection position without other external force, thereby simplifying the difficulty of manual operation. For example, the elastic members 44 are compression springs, a plurality of compression springs are arranged on the guide rods of the guide rod set 43, the upper ends of the compression springs abutting against the rear end face of the rear mold 12, and the lower ends of the compression springs abutting against the front end face of the first seat plate 411 to provide elastic force for the pushing rod set 42 to retreat to the injection position.

[0083] In an embodiment, referring to Figures 2 to 6 , the injection mold 100 comprises an adjusting screw 5 passing through the rear seat 41, the threaded end of the adjusting screw 5 being threadedly connected with the rear mold 12, and the stop end of the adjusting screw 5 abutting against the rear end face of the rear seat 41.

[0084] On the one hand, the adjusting screw 5 can define the distance between the rear mold 12 and the rear seat 41, and constrain the maximum pushing stroke of the pushing rod set 42 in the front-rear direction. Specifically, the rear end face of the rear mold 12 is formed with an adjusting threaded hole, the threaded end of the adjusting screw 5 sequentially passing through the second seat plate 412 and the first seat plate 411 and being threadedly connected with the adjusting threaded hole of the rear end face of the rear mold 12, and the stop end in the adjusting screw 5 abutting against the rear end face of the second seat plate 412 to limit the maximum distance of the rear seat 41 sliding backward relative to the rear mold 12, thereby avoiding the rear seat 41 driving the pushing rod set 42 and the guide rod set 43 to slide backward out of the pushing hole 12b and the guide hole 12c of the rear mold 12, respectively.

[0085] On the other hand, the threaded end of the adjusting screw 5 being threadedly connected with the rear mold 12 can adaptively adjust the distance between the rear mold 12 and the rear seat 41, thereby indirectly adjusting the elastic force of the elastic members 44 located between the rear mold 12 and the rear seat 41.

[0086] In an embodiment, referring to Figures 7 to 8 , Figures 11 to 13The nozzle insert 3 comprises a nozzle base plate 33 and a nozzle cover plate 34 which is combined with the nozzle base plate 33, and the nozzle base plate 33 and the nozzle cover plate 34 enclose to form a nozzle flow channel 3a. Specifically, during normal use of the nozzle insert 3, i.e. in the injection position, the nozzle cover plate 34 is located at the front side of the nozzle base plate 33, and the lower end of the nozzle cover plate 34 and the nozzle base plate 33 jointly constitute the feeding portion 32 of the nozzle insert 3, and the upper end of the nozzle cover plate 34 and the nozzle base plate 33 jointly constitute the mounting portion 31 of the nozzle insert 3.

[0087] The end face of the nozzle cover plate 34 towards the nozzle base plate 33 is formed with a front nozzle groove 34a, and the end face of the nozzle base plate 33 towards the nozzle cover plate 34 is formed with a rear nozzle groove 33a. After the nozzle base plate 33 and the nozzle cover plate 34 are combined, the front nozzle groove 34a and the rear nozzle groove 33a are in abutting fit to form the nozzle flow channel 3a. The feeding port 32a of the nozzle flow channel 3a is located at the front side of the nozzle insert 3, and a part of the feeding port 32a is located on the front nozzle groove 34a, and another part of the feeding port 32a is located on the rear nozzle groove 33a. The discharge port 31a of the nozzle flow channel 3a is in communication with the sleeve cavity 2ba through the communication port 900b, and the discharge port 31a of the nozzle flow channel 3a can be provided with one or more according to actual needs to communicate with multiple different positions of the sleeve cavity 2ba. That is, multiple discharge ports 31a can be simultaneously located on the nozzle cover plate 34 and the nozzle base plate 33. Among them, the discharge port 31a located on the nozzle cover plate 34 is in communication with the front nozzle groove 34a, and the discharge port 31a located on the nozzle base plate 33 is in communication with the rear nozzle groove 33a.

[0088] In order to facilitate the removal of the nozzle 35 solidified in the nozzle flow channel 3a after injection, in an embodiment, please refer to Figures 11 to 13 , the nozzle base plate 33 and the nozzle cover plate 34 are rotationally connected. After injection, the nozzle insert 3 is separated from the product after injection, the nozzle insert 3 is first taken out from the mounting cavity 900c, then the nozzle cover plate 34 combined with the nozzle base plate 33 is opened by turning over the nozzle cover plate 34, and then the nozzle 35 solidified in the nozzle flow channel 3a can be taken out. The operation is simple and convenient, the nozzle cover plate 34 and the nozzle base plate 33 are always connected, the matching is good, and the two are not easy to lose when used together.

[0089] The rotationally connected mode of the nozzle base plate 33 and the nozzle cover plate 34 is not limited, including but not limited to hinged or pivoted, etc. For example, in an embodiment, please refer to Figures 11 to 13 , the end face of the nozzle base plate 33 towards the nozzle cover plate 34 is formed with a first adapter 33b, and the end face of the nozzle cover plate 34 towards the nozzle cover plate 34 is formed with a second adapter 34b. One of the first adapter 33b and the second adapter 34b is formed with a boss for penetrating a rotating shaft, and the other is formed with a groove for penetrating a rotating shaft.

[0090] In order to facilitate the working reliability between the nozzle bottom plate 33 and the nozzle cover plate 34, the first adapter 33b and the second adapter 34b are located on the mounting portion 31. When the to-be-sleeved part 900 is sleeved on the mounting portion 31 of the nozzle insert 3, the nozzle bottom plate 33 and the nozzle cover plate 34 are completely fixed in the mounting cavity 900c and cannot be relatively rotated, thereby avoiding the risk of misrotation of the to-be-sleeved part 900 during injection molding. Specifically, the first adapter 33b and the second adapter 34b are arranged at the end of the mounting portion 31 away from the feeding portion 32. If the nozzle insert 3 is normally used, that is, in the injection molding position, the first adapter 33b and the second adapter 34b are located at the upper end of the mounting portion 31, and the rotation axis of the first adapter 33b and the second adapter 34b extends in the left-right direction.

[0091] The structural material of the mold frame 1 includes, but is not limited to, aluminum material with good heat conduction performance and low density, or steel material with relatively high structural strength.

[0092] In an embodiment, the structural material of the nozzle insert 3 is aluminum material with good heat conduction performance and low density. In this way, the installation and disassembly of the nozzle insert 3 with lighter structure and the to-be-sleeved part 900 are more convenient, and the heat dissipation performance is better, which is beneficial to the rapid solidification of the nozzle 35.

[0093] In an embodiment, the structural material of the injection mold 100 is aluminum material with good heat conduction performance and low density. By using aluminum material, the mass of each component of the injection mold 100 is lighter, and each component moves more flexibly. At the same time, the heat conduction performance of aluminum material itself replaces the conventional mold high-frequency complex cooling mechanism to meet the cooling needs of the plastic from sol to solidification.

[0094] Another aspect of the present application provides an injection molding device, which includes the injection mold 100 and the to-be-sleeved part 900 according to any one of the embodiments described above. The to-be-sleeved part 900 is installed on the nozzle insert 3.

[0095] Please refer to Figures 1 to 13 To realize the injection molding of five colors of the to-be-sleeved part 900, the injection molding process of the injection mold 100 of the present application is described as follows. The injection molding device includes five nozzle inserts 3. In the injection molding position, the nozzle flow channel 3a of each nozzle insert 3 respectively corresponds to the five different color sleeve cavities 2ba in the to-be-sleeved part 900.

[0096] The injection mold 100 is operated to the mounting position of the open mold of the front mold 11 and the rear mold 12, the nozzle insert 3 for the first color is first sleeved into the sleeve part 900 through the mounting port 900a, then the first side core 231, the second side core 232 and the third side core 233 are circumferentially surrounded around the sleeve part 900, and the above-mentioned assembly is embedded into the rear mold core groove 12a, the injection mold 100 is operated to the injection position of the closed mold of the front mold 11 and the rear mold 12, and the injection of the first color is performed.

[0097] After the injection and cooling of the first color are completed, the injection mold 100 is operated to the mounting position of the open mold of the front mold 11 and the rear mold 12, the feeding part 32 of the first side core 231, the second side core 232, the third side core 233 and the nozzle insert 3 is pushed forward out of the rear mold core groove 12a by the ejector mechanism 4, the nozzle insert 3 for the first color is withdrawn from the mounting port 900a at the lower side of the sleeve part 900 and taken out and replaced by the nozzle insert 3 for the second color, then the ejector mechanism 4 is withdrawn backward, and then the assembly composed of the first side core 231, the second side core 232, the third side core 233, the nozzle insert 3 and the sleeve part 900 is embedded into the rear mold core groove 12a again, the injection mold 100 is operated to the injection position of the closed mold of the front mold 11 and the rear mold 12, and the injection of the second color is performed.

[0098] After the injection and cooling of the second color are completed, the injection mold 100 takes out the nozzle insert 3 for the second color and replaces the nozzle insert 3 for the third color, and other injection processes are the same as those for the injection of the second color, and details are not repeated here.

[0099] After the injection and cooling of the third color are completed, the injection mold 100 takes out the nozzle insert 3 for the third color and replaces the nozzle insert 3 for the fourth color, and other injection processes are the same as those for the injection of the second color, and details are not repeated here.

[0100] After the injection and cooling of the fourth color are completed, the injection mold 100 takes out the nozzle insert 3 for the fourth color and replaces the nozzle insert 3 for the fifth color, and other injection processes are the same as those for the injection of the second color, and details are not repeated here.

[0101] After the injection and cooling of the fifth color are completed, the injection mold 100 is operated to the mounting position of the open mold of the front mold 11 and the rear mold 12, the feeding part 32 of the first side core 231, the second side core 232, the third side core 233 and the nozzle insert 3 is pushed forward out of the rear mold core groove 12a by the ejector mechanism 4, then the first side core 231 is withdrawn upward, the second side core 232 is withdrawn leftward, the third side core 233 is withdrawn rightward, the nozzle insert 3 for the fifth color is withdrawn from the mounting port 900a at the lower side of the sleeve part 900, and finally the product after the injection of the five colors is taken out.

[0102] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An injection mold, characterized in that, include: The mold base forms a mold core cavity and injection runner; A mold core is disposed within the mold core cavity; an injection cavity is formed within the mold core. Multiple sprue inserts, wherein sprue inserts have sprue channels formed within them; The sprue insert is used to install the part to be molded. The part to be molded and the injection cavity enclose a molding space. The molding space includes multiple mutually isolated molding cavities. The sprue channel of each sprue insert is connected to the injection channel and at least one molding cavity. The mold frame includes: The front mold has a front mold core groove and the injection runner; The rear mold has a rear mold core groove, and the rear mold is located behind the front mold; The injection mold has an injection position and an installation position. In the injection position, the front mold and the rear mold are closed, and the front mold core groove and the rear mold core groove surround to form the mold core cavity. In the installation position, the front mold is separated from the rear mold in the front-to-back direction. The sprue insert includes an mounting part and a feeding part located at one end of the mounting part. The outer surface of the mounting part is used to fit the die to be fitted. The feeding part forms an inlet of the sprue channel, and the mounting part forms an outlet of the sprue channel. In the injection position, the feeding outlet is connected to the injection channel. Each of the sprue inserts has a sprue channel for introducing injection molding material of the same color from the injection channel into one or more of the molding cavities of the same color.

2. The injection mold according to claim 1, characterized in that, The outer surface of the part to be molded and the inner surface of the injection cavity enclose the molding space to form the molding space.

3. The injection mold according to claim 1, characterized in that, Multiple sprue inserts may be selectively installed on the die to be fitted, and the sprue flow channels of each sprue insert are connected to different die-fitting cavities.

4. The injection mold according to claim 1, characterized in that, The mold core includes a front core block and a rear core block; the front core block is embedded in the front mold core groove and located on the front side of the part to be molded, and the rear core block is embedded in the rear mold core groove and located on the rear side of the part to be molded.

5. The injection mold according to claim 4, characterized in that, The front core block is detachably connected to the front mold, and the rear core block is detachably connected to the rear mold.

6. The injection mold according to claim 4, characterized in that, The mold core includes a peripheral core block assembly. The peripheral core block assembly and the feeding part are both embedded in the rear mold core groove and surround the outer periphery of the part to be molded. The part to be molded, the front core block, the rear core block and the peripheral core block assembly together form the molding space.

7. The injection mold according to claim 6, characterized in that, The injection mold includes a push mechanism. In the installation position, the push mechanism can abut against the peripheral core block assembly and the feed section to move the die to be molded out of the rear mold core groove.

8. The injection mold according to claim 7, characterized in that, The pushing mechanism includes a rear seat and a pushing rod assembly; the rear end of the pushing rod assembly is connected to the rear seat, and the front end of the pushing rod assembly is slidably inserted into the rear mold along the front-rear direction; In the installation position, the rear seat can move forward to drive the push rod assembly to extend forward and abut against the peripheral core block assembly and the feeding part, and the die to be molded moves forward out of the rear mold core groove; In the injection position, the rear seat can move backward to drive the push rod assembly to slide backward, so that the sprue insert and the peripheral core block assembly, on which the die to be molded are fitted, can be embedded in the rear mold core groove.

9. The injection mold according to claim 8, characterized in that, The peripheral core assembly includes a first side core located on the upper side of the die to be fitted, a second side core located on the left side, and a third side core located on the right side; the feeding part is located on the lower side of the die to be fitted; in the installation position, the push rod assembly can simultaneously abut against the first side core, the second side core, the third side core, and the feeding part in the front-back direction.

10. The injection mold according to claim 8, characterized in that, The push mechanism includes a guide rod assembly; the rear end of the guide rod assembly is connected to the rear seat, and the front end of the guide rod assembly is slidably inserted into the rear mold in the front-back direction. The guide rod assembly is parallel to the push rod assembly and is located outside the push rod assembly.

11. The injection mold according to claim 8, characterized in that, The push mechanism includes an elastic element, the two ends of which abut against the rear mold and the rear seat respectively in the front-rear direction, so as to provide an elastic force for the push rod assembly to retract to the injection position.

12. The injection mold according to claim 8, characterized in that, The injection mold includes an adjusting bolt that passes through the rear seat. The screw end of the adjusting bolt is threaded into the rear mold, and the stop end of the adjusting bolt abuts against the rear end face of the rear seat.

13. The injection mold according to claim 1, characterized in that, The sprue insert includes a sprue base plate and a sprue cover plate that covers the sprue base plate, the sprue base plate and the sprue cover plate being enclosed to form the sprue flow channel.

14. The injection mold according to claim 13, characterized in that, The sprue bottom plate is rotatably connected to the sprue cover plate.

15. An injection molding apparatus, characterized in that, It includes the injection mold as described in any one of claims 1 to 14 and the die to be molded; the die to be molded is installed on the sprue insert.

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