An injection mold

Abstract

The present invention discloses an injection mold, comprising: a mold core, the mold core comprises an upper mold core, a lower mold core, a sliding assembly movably arranged between the upper mold core and the lower mold core, and a supporting ejection assembly, the lower mold core is sleeved on the upper end of the supporting ejection assembly, the sliding assembly is provided with a first mounting groove for placing the part to be injected, the lower mold core is provided with a second mounting groove for placing the part to be injected, and when the mold is closed, a cavity is formed between the upper mold core, the lower mold core, the sliding assembly and the supporting assembly, as well as an upper mold base and a lower mold base. The present invention adopts an injection mold, wherein an elastic member with a buffer is provided between the upper mold core, the lower mold core and the sliding assembly, so that no rigid impact is generated when the mold is opened and closed, thereby reducing damage to the mold; during the injection molding process, the upper mold core, the lower mold core and the sliding assembly are tightly matched, and no gap is generated to cause the problem of flash of the injection molded part.

Description

Technical Field

[0001] The invention relates to the field of molds, in particular to an injection mold. Background Art

[0002] Gear transmission is the most widely used transmission method in mechanical transmission, and plastic gears, as one of the gear products, are increasingly widely used in various fields. In the existing market, insert injection-molded gears have greatly met the requirements of industrial development. During injection molding, the insert needs to be positioned before injection molding. Gear injection molding is prone to flash and other problems, which reduces production efficiency and increases the time workers spend selecting workpieces.

[0003] For example, China Patent Publication No., publication date June 9, 2020, named "A Plastic Gear Injection Mold with an Embedded Part", includes a front mold body and a rear mold body, the rear mold body includes a rear mold part and a bottom plate, the bottom plate is arranged on the side of the rear mold part away from the front mold body; the rear mold part is provided with a longitudinally arranged assembly hole for assembling a columnar embedded part and a transverse positioning structure for transversely positioning the columnar embedded part; the bottom plate is provided with a longitudinal positioning structure; when assembling the columnar embedded part, the longitudinal positioning structure can pre-position the columnar embedded part longitudinally to avoid displacement of the columnar embedded part during the mold closing process, affecting the installation accuracy and installation speed of the columnar embedded part. When closing the mold, the longitudinal positioning structure and the transverse positioning structure respectively perform longitudinal final positioning and transverse positioning on the columnar embedded part, so that the columnar embedded part can be accurately and quickly positioned.

[0004] The disadvantages of the existing patents are: (1) when the mold is closed, the rigid impact between the upper mold core and the lower mold core easily generates flash when the gear is injected, which reduces the product qualification rate and aesthetics and increases the cost of subsequent processing; (2) when the mold is opened, the injection molded part is directly ejected, and the ejection process easily causes damage to the injection molded part. Summary of the invention

[0005] The purpose of the present invention is to overcome the problem that gears generate flash during injection molding and reduce production efficiency, and to provide an injection mold that reduces flash generated during gear injection molding, improves gear product quality and improves production efficiency.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] An injection mold, comprising:

[0008] The mold core includes an upper mold core, a lower mold core, a sliding assembly movably arranged between the upper mold core and the lower mold core, and a supporting ejection assembly. The lower mold core is sleeved on the upper end of the supporting ejection assembly. The sliding assembly is provided with a first mounting groove for placing the part to be injected. The lower mold core is provided with a second mounting groove for placing the part to be injected. When the mold is closed, a cavity is formed between the upper mold core, the lower mold core, the sliding assembly and the supporting assembly.

[0009] An upper die base, wherein the upper die base is provided with a top plate, an upper die support plate and an upper die plate in sequence from top to bottom, and the upper die core is located on a side of the upper die plate facing the die core;

[0010] The lower mold base is provided with a lower mold plate, a mold foot, a lower mold supporting plate and a lower mold plate from bottom to top. The lower mold plate is provided with a movable cavity on the side facing the mold core, and the lower mold core is arranged in the movable cavity. The sliding assembly is movably arranged on both sides of the lower mold core. A baffle is provided on the lower mold plate, and a push plate is provided on the baffle.

[0011] A feed port is arranged on the top plate, a main flow channel connected to the feed port is arranged in the top plate and the upper mold support plate, and a branch flow channel connected to the main flow channel and the cavity is arranged in the upper mold support plate and the upper mold plate.

[0012] When the mold is closed, the upper mold base and the lower mold base are closed, and the upper mold core, the lower mold core, the sliding assembly and the supporting ejection assembly form a cavity in the moving cavity. The sliding assembly is located between the upper mold core and the lower mold core, and the supporting ejection assembly is located below the lower mold core. The upper end of the supporting ejection assembly extends into the cavity, and the supporting ejection assembly cooperates with the inner wall of the injection molded part. When the injection molded part is placed on the first installation groove and the second installation groove, the injection material enters the cavity through the feed port, the main flow channel and the secondary flow channel in turn. After the injection molding is completed, the upper mold base and the lower mold base are separated, and the sliding assembly is moved to eject the injection molded part through the supporting ejection assembly.

[0013] The first installation groove and the second installation groove facilitate installation of the molded part, facilitate installation of the molded part in the insert-type injection mold, and the sliding component improves the accuracy of the position of the insert in the molded part, thereby improving the qualified rate of the molded parts.

[0014] Preferably, the sliding assembly includes a movable plate movably arranged on both sides of the lower mold core and a sliding insert arranged on the movable plate, one end of the sliding insert is arranged on the movable plate, the other end of the sliding insert is located above the lower mold core and a first mounting groove is provided on the upper end surface, the sliding inserts located on both sides of the lower mold core are symmetrically distributed one by one, and when the mold is closed, the two symmetrically distributed sliding inserts are tightly fitted; a translation cylinder is provided on the lower mold plate, the translation cylinder is located on both sides of the lower mold core, the output shaft of the translation cylinder is connected to the movable plate, and the translation cylinder drives the movable plate to move relative to each other on both sides of the lower mold core.

[0015] The movable plate is provided with a plurality of sliding inserts. The movable plates on both sides of the lower mold core are symmetrically distributed according to the lower mold core. The movable plate moves in the movable groove driven by the translation cylinder. The movable plate drives the sliding insert to move along both sides of the lower mold core in the movable cavity. When the mold is closed, the two symmetrically distributed sliding inserts are tightly matched, and the first mounting grooves on the two sliding inserts are matched. The injection molded parts are prevented from being placed on the first mounting grooves of the two sliding inserts. The mold cavity and the runner are matched one by one. Each mold cavity is correspondingly provided with a plurality of gates distributed in a circumferential manner. The gates penetrate the mold cavity and the runner. The gates distributed in a circumferential manner make the injection more precise during injection molding, make the injection molding material in the mold cavity evenly distributed, and improve the qualified rate of injection molded parts.

[0016] Preferably, an elastic member is provided between the sliding insert and the moving plate, the elastic member is perpendicular to the moving plate, and a limit plate is provided on the outer side of the sliding insert in a one-to-one correspondence, and the limit plate is inclined toward the first mounting groove at one end of the upper mold seat. The moving plate is connected to one end of the sliding insert, and elastic members are provided in the moving plate and the sliding insert, so that the sliding insert floats in a direction perpendicular to the upper end surface of the moving plate; before closing the mold, the insert is placed in the second mounting groove, and then the sliding inserts that are symmetrically matched one by one are driven to fit tightly by the translation cylinder, and the insert is placed in the first mounting groove, and then the mold is closed, the upper mold seat and the lower mold seat are closed, and the inclined surface of the limit plate presses the sliding insert against the lower mold core, so that it is not easy to produce flash during injection molding, which causes a decrease in the qualified rate of products.

[0017] Preferably, the limit plate is arranged in the upper die core by countersunk screws, and the limit plate is matched with the outer side wall of one end of the sliding insert arranged on the moving block in a one-to-one correspondence. The side of the sliding insert facing the outside of the mold is inclined, and the inclined surface cooperates with the limit plate. When the mold is closed, the limit plate presses the sliding insert against the upper end surface of the lower die core through the inclined surface, so that the sliding insert and the lower die core are tightly matched. During injection molding, no gap is generated between the upper die core, the lower die core and the sliding insert, which solves the problem of easy flash of parts during injection molding.

[0018] Preferably, the lower mold core includes a mold core plate corresponding one-to-one to the first mounting groove when the mold is closed and a mold core seat for placing the mold core plate, a plurality of mold core plates are arranged on the mold core seat, and the mold core plates are provided with second mounting grooves corresponding one-to-one to the first mounting grooves.

[0019] The mold base is provided with mounting grooves corresponding to the mold plates one by one. The mold plates correspond to the sliding components one by one, and multiple injection molded parts can be injected at the same time. When the mold plates, sliding inserts, etc. are damaged, they can be replaced, reducing the cost of maintenance; several sliding inserts are arranged on a sliding plate, and several mold plates are arranged on the mold base, so that when the sliding component moves, it only needs to be driven by a relative translation cylinder at the same time, reducing the cost of work.

[0020] Preferably, the supporting ejection assembly includes a supporting member for supporting the injection molded part and an ejector pin inserted in the supporting member, wherein the supporting member is inserted in the lower mold core, the upper end of the supporting member cooperates with the inner side wall of the injection molded part, the upper end surface of the ejector pin is flush with the lower end surface of the injection molded part, and the ejector pin is arranged on the push plate, and the ejector pin passes through the lower mold supporting plate, the lower mold plate and the supporting member in sequence.

[0021] The upper end of the support part cooperates with the inner side wall of the injection molded part to be produced. During injection molding, the support part extends into the mold cavity. The support part is fixedly arranged in the lower mold core. The support part is provided with ejectors distributed in a circle. The lower end of the ejector is provided with a limiting protrusion which is limited on the push plate. The baffle plate fixes the ejector on the push plate. The push plate and the baffle plate are fixed by countersunk screws. The ejector is used to eject the injection molded part.

[0022] Preferably, the supporting ejection assembly further comprises a first floating needle inserted into the supporting member and a second floating needle evenly distributed on the outside of the supporting member, the upper end surface of the first floating needle is flush with the lower end surface of the injection molded part, the upper end of the second ejector pin is fixedly arranged on the mold core plate, a plurality of grooves are arranged on the side of the lower mold supporting plate facing the mold core, the first floating plate and the second floating plate fixed by countersunk screws are arranged in the grooves, a spring sheet is arranged at the lower end of the second floating plate, the first floating needle is arranged on the first floating plate, the second floating needle is arranged on the first floating plate, the first floating needle passes through the lower mold supporting plate, the lower mold plate and the supporting member, and the second floating needle passes through the lower mold supporting plate and the lower mold plate.

[0023] The first floating needle is located between the injection molded part and the lower mold support plate, and the second floating needle is located between the mold core plate and the lower mold support plate. The first floating needle and the second floating needle float along the mold pressure direction through the spring sheet, so that no rigid impact is generated between the upper mold core, the lower mold core and the sliding insert when the mold is closed and opened, and when the mold is opened after the injection molded part is cooled, the mold core plate floats, so that the injection molded part is buffered when demolding, thereby reducing damage to the injection molded part during the demolding process.

[0024] Preferably, an elastic member is provided between the lower die support plate and the lower mold plate, and the lower mold plate is floatingly arranged on the lower die support plate. The elastic member adopts a linear spring, and a guide rod is arranged inside the linear spring. The guide rod is arranged vertically with the lower mold plate, so that the lower mold plate can float on the lower die support plate along the pressure direction. When the mold is opened and closed, the lower die support plate and the lower mold plate are buffered, and rigid impact is not easy to occur.

[0025] Preferably, an elastic member is provided between the push plate and the lower mold plate, and the elastic member penetrates the lower mold support plate. The elastic member adopts a linear spring, and a guide rod is inserted into the linear spring. The guide rod is arranged perpendicular to the push plate, so that the push plate and the baffle are buffered and limited when they move up and down along the mold pressure direction under the action of the driving force.

[0026] Preferably, the top plate and the upper mold support plate are fixed by countersunk screws, and guide columns and guide sleeves cooperating with the guide columns are provided between the upper mold support plate and the upper mold plate.

[0027] Therefore, the present invention has the following beneficial effects: (1) an elastic member with a buffer function is provided between the upper mold core, the lower mold core and the sliding assembly, so that no rigid impact is generated when the mold is opened and closed, thereby reducing damage to the mold; (2) during the injection molding process, the upper mold core, the lower mold core and the sliding assembly are tightly fitted, and no gap is generated to cause the problem of flash on the injection molded part. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the present invention.

[0029] Figure 2 It is a structural schematic diagram of the lower die base of the present invention.

[0030] Figure 3 It is a top view of the lower die base of the present invention.

[0031] Figure 4 yes Figure 3 Sectional view of AA.

[0032] Figure 5 yes Figure 3 Cross-sectional view of BB.

[0033] Figure 6 It is a structural schematic diagram of the supporting and ejecting assembly, the moving assembly and the bottom plate of the present invention.

[0034] Figure 7 It is a structural schematic diagram of a supporting ejection assembly of the present invention provided with an injection molded part.

[0035] Figure 8 It is a cross-sectional view of the support and ejection assembly of the present invention provided with an injection molded part.

[0036] Fig. 9 It is a structural schematic diagram of a supporting and ejecting assembly and a moving assembly provided with an injection molded part in the present invention.

[0037] Fig.10 It is a structural schematic diagram of the injection molded part in the present invention.

[0038] Fig.11 yes Fig.10 A cross-sectional view of .

[0039] As shown in the figure: upper mold core 1, lower mold core 2, mold core plate 2.1, mold core seat 2.2,

[0040] Sliding assembly 3, moving plate 3.1, sliding insert 3.2,

[0041] Supporting ejector assembly 4, supporting member 4.1, ejector pin 4.2, first floating pin 4.3, second floating pin 4.4, first floating plate 4.5, second floating plate 4.6, spring sheet 4.7

[0042] First mounting groove 5, second mounting groove 6,

[0043] Upper die base 7, top plate 7.1, upper die support plate 7.2, upper die plate 7.3,

[0044] Lower die base 8, bottom plate 8.1, die foot 8.2, lower die support plate 8.3, lower die plate 8.4, baffle plate 8.5, push plate 8.6,

[0045] Moving cavity 9, translation cylinder 10, limiting plate 11, guide column 12, guide sleeve 13, injection molded part 14, insert 15. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical scheme and advantages of the technical solution embodiments of the present invention clearer, the present invention is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0047] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 In the embodiment shown, an injection mold comprises:

[0048] The mold core includes an upper mold core 1, a lower mold core 2, a sliding assembly 3 and a supporting ejection assembly 4 movably arranged between the upper mold core 1 and the lower mold core 2, the lower mold core 2 is sleeved on the upper end of the supporting ejection assembly 4, the sliding assembly 3 is provided with a first mounting groove 5 for placing the to-be-injected part 14, and the lower mold core 2 is provided with a second mounting groove 6 for placing the to-be-injected part 14. When the mold is closed, a cavity is formed between the upper mold core 1, the lower mold core 2, the sliding assembly 3 and the supporting assembly;

[0049] The upper die base 7 is provided with a top plate 7.1, an upper die support plate 7.2 and an upper die plate 7.3 from top to bottom in sequence, and the upper die core 1 is located on the side of the upper die plate 7.3 facing the die core; a feed port is provided on the top plate 7.1, a main flow channel connected to the feed port is provided in the top plate 7.1 and the upper die support plate 7.2, and a branch flow channel connected to the main flow channel and the cavity is provided in the upper die support plate 7.2 and the upper die plate 7.3.

[0050] The lower die base 8 is provided with a bottom plate 8.1, a die foot 8.2, a lower die support plate 8.3 and a lower die plate 8.4 from bottom to top in sequence. The lower die plate 8.4 is provided with a movable cavity 9 on the side facing the die core. The lower die core 2 is arranged in the movable cavity 9. The sliding assembly 3 is movably arranged on both sides of the lower die core 2. A baffle plate 8.5 is provided on the lower die plate 8.4, and a push plate 8.6 is provided on the baffle plate 8.5.

[0051] The mold is provided with cooling water channels, support rods, guide pillars 12 and other indispensable parts in the prior art.

[0052] When the mold is closed, the upper mold base 7 and the lower mold base 8 are closed, and the upper mold core 1, the lower mold core 2, the sliding assembly 3 and the supporting ejection assembly 4 form a cavity in the moving cavity 9. The sliding assembly 3 is located between the upper mold core 1 and the lower mold core 2, and the supporting ejection assembly 4 is located below the lower mold core 2. The upper end of the supporting ejection assembly 4 extends into the cavity, and the supporting ejection assembly 4 cooperates with the inner wall of the injection molded part 14. The injection molded part 14 is placed on the first mounting groove 5 and the second mounting groove 6, and the injection material enters the cavity through the feed port, the main flow channel and the secondary flow channel in sequence. After the injection molding is completed, the upper mold base 7 and the lower mold base 8 are separated, and the sliding assembly 3 is moved to eject the injection molded part 14 through the supporting ejection assembly 4.

[0053] The first installation groove 5 and the second installation groove 6 facilitate installation of the molded part 14 and the insert 15 type injection mold to install the molded part 14 , and the sliding component 3 improves the accuracy of the position of the insert 15 in the molded part 14 and improves the qualified rate of the molded part 14 .

[0054] An injection mold described in the above embodiment positions the insert 15 by means of a sliding component 3 and a lower mold core 2, so that the insert 15 is accurately positioned in the cavity, so that the insert 15 will not be offset during the injection molding process, and the moving component can float, so that the injection molded part 14 is not prone to flash and other problems during the injection molding process.

[0055] like Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8 , Fig. 9As shown, the sliding assembly 3 includes a moving plate 3.1 movably arranged on both sides of the lower mold core 2 and a sliding insert 3.2 arranged on the moving plate 3.1, one end of the sliding insert is arranged on the moving plate 3.1, the other end of the sliding insert 3.2 is located above the lower mold core 2 and a first mounting groove 5 is provided on the upper end surface, the sliding inserts 3.2 located on both sides of the lower mold core 2 are symmetrically distributed one by one, and when the mold is closed, the two symmetrically distributed sliding inserts are tightly fitted; a translation cylinder 10 is provided on the lower mold plate 8.4, the translation cylinder 10 is located on both sides of the lower mold core 2, the output shaft of the translation cylinder 10 is connected to the moving plate 3.1, and the translation cylinder 10 drives the moving plate 3.1 to move relatively on both sides of the lower mold core 2.

[0056] The moving plate 3.1 is provided with a plurality of sliding inserts. The moving plates 3.1 located on both sides of the lower mold core 2 are symmetrically distributed according to the lower mold core 2. The moving plate 3.1 moves in the moving groove driven by the translation cylinder 10. The moving plate 3.1 drives the sliding insert 3.2 to move along both sides of the lower mold core 2 in the moving cavity 9. When the mold is closed, the two symmetrically distributed sliding inserts 3.2 are tightly matched, and the first mounting grooves 5 on the two sliding inserts 3.2 are matched. The injection molded parts 14 are prevented from being placed on the first mounting grooves 5 of the two sliding inserts 3.2. The mold cavity and the runner are matched one by one. Each mold cavity is provided with a plurality of gates distributed in a circumferential manner, and the gates pass through the mold cavity and the runner. The gates distributed in a circumferential manner make the injection more precise during injection molding, make the injection molding material in the mold cavity evenly distributed, and improve the qualified rate of the injection molded parts 14.

[0057] The insert 15 is positioned by the sliding assembly 3 and the lower mold core 2, so that the insert 15 is accurately positioned in the cavity, so that the insert 15 will not be offset during the injection molding process.

[0058] like Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, an elastic member is provided between the sliding insert and the moving plate 3.1, and the elastic member is perpendicular to the moving plate 3.1. A limit plate 11 is provided on the outer side of the sliding insert in a one-to-one correspondence, and the limit plate 11 is inclined toward the first mounting groove 5 at one end of the upper mold base 7. The moving plate 3.1 is connected to one end of the sliding insert 3.2, and elastic members are provided in the moving plate 3.1 and the sliding insert 3.2, so that the sliding insert 3.2 floats in the direction perpendicular to the upper end surface of the moving plate 3.1; before closing the mold, the insert 15 is placed in the second mounting groove 6, and then the sliding inserts 3.2 that are symmetrically matched one by one are driven to fit tightly by the translation cylinder 10, and the insert 15 is placed in the first mounting groove 5, and then the mold is closed, the upper mold base 7 and the lower mold base 8 are closed, and the inclined surface of the limit plate 11 presses the sliding insert 3.2 on the lower mold core 2, so that it is not easy to produce flash during injection molding, which causes a decrease in the qualified rate of products.

[0059] like Figure 4, Figure 5 , Figure 6 As shown, the limit plate 11 is set in the upper mold core 1 by countersunk screws, and the limit plate 11 is matched with the outer side wall of one end of the sliding insert 3.2 set on the moving block. The side of the sliding insert facing the outside of the mold is inclined, and the inclined surface cooperates with the limit plate 11. When the mold is closed, the limit plate 11 presses the sliding insert 3.2 on the upper end surface of the lower mold core 2 through the inclined surface, so that the sliding insert 3.2 and the lower mold core 2 are tightly matched. During injection molding, no gap will be generated between the upper mold core 1, the lower mold core 2 and the sliding insert 3.2, which solves the problem of easy flash of parts during injection molding.

[0060] like Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, the lower mold core 2 includes a mold core plate 2.1 corresponding one-to-one to the first mounting groove 5 when the mold is closed and a mold core seat 2.2 for placing the mold core plate 2.1, a plurality of mold core plates 2.1 are arranged on the mold core seat 2.2, and a second mounting groove 6 corresponding one-to-one to the first mounting groove 5 is arranged on the mold core plate 2.1.

[0061] The mold base 2.2 is provided with mounting grooves corresponding to the mold plate 2.1 one by one. The mold plate 2.1 corresponds to the sliding assembly 3 one by one, and multiple injection molded parts 14 can be injected at the same time. When the mold plate 2.1, the sliding insert 3.2, etc. are damaged, they can be replaced, reducing the cost of maintenance; several sliding inserts 3.2 are arranged on a sliding plate, and several mold plates 2.1 are arranged on the mold base 2.2, so that when the sliding assembly 3 moves, it only needs to be driven by a relative translation cylinder 10 at the same time, reducing the cost of work.

[0062] The mold base 2.2 is provided with a groove for mounting the mold plate 2.1, and the mold plate 2.1 is provided with a plurality of limiting partitions, and the sliding insert 3.2 moves in the limiting partitions for guiding the sliding insert 3.2. A guide groove is provided at the lower end of the moving block, and a guide plate is provided at the lower end of the moving plate 3.1, and a guide block is provided on the guide plate, so that the moving plate 3.1 moves in the moving cavity 9 without deviation.

[0063] like Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 As shown, the supporting ejection assembly 4 includes a supporting member 4.1 for supporting the injection molded part 14, and an ejector pin 4.2 inserted into the supporting member 4.1. The supporting member 4.1 is inserted into the lower mold core 2. The upper end of the supporting member 4.1 cooperates with the inner side wall of the injection molded part 14. The upper end surface of the ejector pin 4.2 is flush with the lower end surface of the injection molded part 14. The ejector pin 4.2 is arranged on the push plate 8.6. The ejector pin 4.2 sequentially passes through the lower mold supporting plate 8.3, the lower mold plate 8.4 and the supporting member 4.1.

[0064] The upper end of the support member 4.1 cooperates with the inner side wall of the injection molded part 14 to be produced. During injection molding, the support member 4.1 extends into the mold cavity. The support member 4.1 is fixedly arranged in the lower mold core 2. The support member 4.1 is provided with ejector pins 4.2 distributed circumferentially. The lower end of the ejector pins 4.2 is provided with a limiting protrusion limited on the push plate 8.6. The baffle plate 8.5 fixes the ejector pins 4.2 on the push plate 8.6. The push plate 8.6 and the baffle plate 8.5 are fixed by countersunk screws. The ejector pins 4.2 are used to eject the injection molded part 14.

[0065] like Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 As shown, the supporting ejection assembly 4 also includes a first floating needle 4.3 inserted into the supporting member 4.1 and a second floating needle evenly distributed on the outside of the supporting member 4.1. The upper end surface of the first floating needle 4.3 is flush with the lower end surface of the injection molded part 14. The upper end of the second ejector pin 4.2 is fixed to the mold core plate 2.1. The lower mold supporting plate 8.3 is provided with a plurality of grooves on the side facing the mold core. The first floating plate 4.5 and the second floating plate 4.6 fixed by countersunk screws are provided in the grooves. The lower end of the second floating plate 4.6 is provided with a spring sheet 4.7. The first floating needle 4.3 is arranged on the first floating plate 4.5, and the second floating needle is arranged on the first floating plate 4.5. The first floating needle 4.3 penetrates the lower mold supporting plate 8.3, the lower mold plate 8.4 and the supporting member 4.1, and the second floating needle penetrates the lower mold supporting plate 8.3 and the lower mold plate 8.4.

[0066] The first floating needle 4.3 is located between the injection molded part 14 and the lower mold support plate 8.3, and the second floating needle is located between the mold core plate 2.1 and the lower mold support plate 8.3. The first floating needle 4.3 and the second floating needle float along the mold pressure direction through the spring sheet 4.7, so that no rigid impact is generated between the upper mold core 1, the lower mold core 2 and the sliding insert 3.2 when the mold is closed and opened, and when the mold is opened after the injection molded part 14 is cooled, the mold core plate 2.1 floats, so that the injection molded part 14 is buffered when demolding, thereby reducing damage to the injection molded part 14 during the demolding process.

[0067] like Figure 5 As shown, an elastic member is provided between the lower die support plate 8.3 and the lower die plate 8.4, and the lower die plate 8.4 is floatingly provided on the lower die support plate 8.3. The elastic member adopts a linear spring, and a guide rod is provided inside the linear spring. The guide rod is vertically provided with the lower die plate 8.4, so that the lower die plate 8.4 can float on the lower die support plate 8.3 along the pressure direction. When the mold is opened and closed, the lower die support plate 8.3 and the lower die plate 8.4 are buffered, and rigid impact is not easy to occur.

[0068] like Figure 8As shown, an elastic member is provided between the push plate 8.6 and the lower mold plate 8.4, and the elastic member penetrates the lower mold support plate 8.3. The elastic member adopts a linear spring, and a guide rod is provided inside the linear spring. The guide rod is vertically arranged with the push plate 8.6, so that the push plate 8.6 and the baffle plate 8.5 are buffered and limited when they move up and down along the mold pressure direction under the action of the driving force.

[0069] like Figure 5 As shown, the top plate 7.1 is fixed to the upper mold support plate 7.2 by countersunk screws, and a guide column 12 and a guide sleeve 13 matched with the guide column 12 are provided between the upper mold support plate 7.2 and the upper mold plate 7.3.

[0070] The specific embodiments described above are only preferred implementations of the present invention, and are not intended to limit the specific implementation scope of the present invention. All equivalent changes made according to the shape and structure of the present invention should be included in the protection scope of the present invention.

Claims

1. An injection mold, characterized in that: include: The mold core includes an upper mold core, a lower mold core, a sliding assembly and a supporting ejection assembly movably arranged between the upper mold core and the lower mold core, the lower mold core is sleeved on the upper end of the supporting ejection assembly, the sliding assembly is provided with a first mounting groove for placing the part to be injected, and the lower mold core is provided with a second mounting groove for placing the part to be injected. When the mold is closed, a cavity is formed between the upper mold core, the lower mold core, the sliding assembly and the supporting assembly; an upper mold base, the upper mold base is provided with a top plate, an upper mold supporting plate and an upper mold plate from top to bottom, and the upper mold core is located on the side of the upper mold plate facing the mold core; a lower mold base, the lower mold base is provided with a bottom plate from bottom to top , mold feet, lower mold supporting plate and lower mold plate, a movable cavity is provided on the side of the lower mold plate facing the mold core, the lower mold core is arranged in the movable cavity, the sliding assembly is movably arranged on both sides of the lower mold core, a baffle is provided on the lower mold plate, and a push plate is provided on the baffle; the supporting ejection assembly includes a supporting member for supporting the injection molded part and a first floating needle penetrated in the supporting member and a second floating needle evenly distributed on the outside of the supporting member, the first floating needle is located between the injection molded part and the lower mold supporting plate, the second floating needle is located between the mold core plate and the lower mold supporting plate, and the first floating needle and the second floating needle float along the mold pressure direction through a spring sheet.

2. An injection mold according to claim 1, characterized in that: The sliding assembly includes a movable plate movably arranged on both sides of the lower mold core and a sliding insert arranged on the movable plate, one end of the sliding insert is arranged on the movable plate, the other end of the sliding insert is located above the lower mold core and a first mounting groove is provided on the upper end surface, the sliding inserts located on both sides of the lower mold core are symmetrically distributed one by one, and when the mold is closed, the two symmetrically distributed sliding inserts are tightly fitted; a translation cylinder is provided on the lower mold plate, the translation cylinder is located on both sides of the lower mold core, the output shaft of the translation cylinder is connected to the movable plate, and the translation cylinder drives the movable plate to move relative to each other on both sides of the lower mold core.

3. An injection mold according to claim 2, characterized in that: An elastic member is provided between the sliding insert and the movable plate, the elastic member is perpendicular to the movable plate, and a limiting plate is provided one by one on the outer side of the sliding insert, and one end of the limiting plate is inclined toward the first mounting groove toward the upper mold base.

4. An injection mold according to claim 3, characterized in that: The limit plate is arranged in the upper template by means of a countersunk screw, and the limit plate is matched with the outer side wall of one end of the sliding insert arranged on the moving block in a one-to-one correspondence.

5. The injection mold according to claim 1, characterized in that: The lower mold core includes a mold core plate corresponding to the first mounting groove in one-to-one correspondence when the mold is closed and a mold core seat for placing the mold core plate, a plurality of mold core plates are arranged on the mold core seat, and the mold core plates are provided with second mounting grooves corresponding to the first mounting grooves in one-to-one correspondence.

6. The injection mold according to claim 1, characterized in that: The supporting ejection assembly includes an ejector pin which is inserted into the supporting member, the supporting member is inserted into the lower mold core, the upper end of the supporting member cooperates with the inner side wall of the injection molded part, the upper end surface of the ejector pin is flush with the lower end surface of the injection molded part, the ejector pin is arranged on the push plate, and the ejector pin passes through the lower mold supporting plate, the lower mold plate and the supporting member in sequence.

7. An injection mold according to claim 1 or 6, characterized in that: The upper end surface of the first floating needle is flush with the lower end surface of the injection molded part, the upper end of the second floating needle is fixed to the mold core plate, the lower mold support plate is provided with a plurality of grooves on the side facing the mold core, the first floating plate and the second floating plate fixed by countersunk screws are provided in the grooves, the lower end of the second floating plate is provided with a spring sheet, the first floating needle is arranged on the first floating plate, the second floating needle is arranged on the first floating plate, the first floating needle passes through the lower mold support plate, the lower mold plate and the supporting member, and the second floating needle passes through the lower mold support plate and the lower mold plate.

8. The injection mold according to claim 1, characterized in that: An elastic member is arranged between the lower die support plate and the lower die plate, and the lower die plate is floatingly arranged on the lower die support plate.

9. The injection mold according to claim 1, characterized in that: An elastic member is arranged between the push plate and the lower mold plate, and the elastic member penetrates through the lower mold supporting plate.

10. The injection mold according to claim 1, characterized in that: The top plate is fixed to the upper mold support plate by countersunk screws, and a guide column and a guide sleeve matched with the guide column are arranged between the upper mold support plate and the upper mold plate.

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