Multi-cavity automatic sprue cutting forming mold

Abstract

The utility model discloses a multi-cavity automatic sprue cutting forming mold which comprises a front mold assembly and a rear mold assembly, a glue injection opening is formed in the front mold assembly, and the rear mold assembly and the front mold assembly movably abut against each other to form a plurality of injection molding cavities. The original mode that an independent shearing device is arranged below each pouring gate is changed into the mode that the cutting-off assembly is fixed to the rear mold assembly, and the blade is arranged in the length direction of the rear mold assembly to cover the outlet ends of all the branch channels, so that multiple products and the pouring gates can be cut at the same time, and the production efficiency is improved; and compared with an independent shearing device, the design saves more space, more injection molding cavities can be arranged in a limited space, more products can be produced in the same time, the production cost is reduced, and compared with the independent shearing device, the cut-off assembly is simpler in structure, not prone to damage and convenient to use. Even if damage occurs, parts are easy to replace, and the maintenance cost is low.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection mold technical field, concretely is a kind of multi-cavity automatic sprue cutting forming die. BACKGROUND

[0002] Injection mold is a tool for producing plastic products, and is also 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 refers to the high-pressure injection of heated and melted plastic into mold cavity by injection molding machine, and after cooling and solidification, the shaped product is obtained.

[0003] In injection production, product injection molding demolding, there is still sprue on the product, at this time, the sprue needs to be cut off to ensure the appearance of the product. However, the current sprue cutting generally adopts secondary processing removal, either manual cutting, which is slow, or mechanical hand batch cutting, but the mechanical hand needs to replace the jig according to the product model, which is high in cost. No matter which way secondary processing is used, the product needs to be transferred out of the injection mold first and then processed, which still consumes time and effort and is low in working efficiency. Although an automatic sprue cutting forming die has been developed at present, the existing automatic sprue cutting forming die needs to set a separate cutting device under each sprue, and the cutting device performs synchronous but independent cutting action on each sprue after product forming. Therefore, multiple cutting devices are needed to realize batch cutting, which not only significantly increases the design and manufacturing difficulty of the mold, but also means more components and potential failure points, thereby leading to an increase in maintenance cost. In addition, it is also necessary to ensure that all independent cutting devices work at the same speed and force at the same time, otherwise it is easy to cause product quality problems such as sprue residue. And long-term use will also cause different degrees of wear of each cutting device, ultimately affecting product quality. Finally, multiple independent cutting devices need to occupy a large amount of internal space of the mold, affecting the layout of other components such as cooling pipes. CONTENT OF THE UTILITY MODEL

[0004] In order to solve the above-mentioned problems, the utility model provides a kind of multi-cavity automatic sprue cutting forming die, comprising:

[0005] Front mold assembly is provided with glue injection port;

[0006] Rear mold assembly is movably abutted with front mold assembly, and when front mold assembly and rear mold assembly are abutted with each other, multiple injection molding cavities are formed between front mold assembly and rear mold assembly;

[0007] The glue inlet channel is arranged on the rear mold assembly, and comprises a main flow channel and a plurality of branch channels distributed on both sides of the main flow channel. The branch channels are communicated with the main flow channel, and the inlet end of the main flow channel is communicated with the glue injection opening. The outlet end of each branch channel is communicated with one injection mold cavity.

[0008] The cutting assembly is arranged on the rear mold assembly and below the outlet end of the branch channel. The cutting assembly comprises a fixing seat, a driving member and a blade. The fixing seat is fixed on the rear mold assembly, the driving member is fixed on the fixing seat, the driving end of the driving member is connected with the blade, and the blade is provided with a plurality of notches along the length direction of the blade. Each notch corresponds to the outlet end of the branch channel, and each notch is arranged between the injection mold cavity and the outlet end of the branch channel.

[0009] Preferably, the cross section of the blade perpendicular to the length direction of the blade is trapezoidal, and the notch is processed into a blade structure by thinning. The trapezoidal cross section of the blade can increase the thickness of the whole blade, improve the rigidity and durability of the blade, disperse the stress generated in the cutting process, prolong the overall service life of the blade, protect the non-cutting part, and ensure that the blade has higher cutting efficiency and precision in the key area.

[0010] Preferably, the fixing seat and the driving member are provided with at least two, respectively. The two fixing seats are fixed on both ends of the rear mold assembly, and the two driving members are fixed on the two fixing seats. The driving ends of the two driving members are connected with the same blade. The two driving members synchronously drive the blade to reciprocate along the length direction of the rear mold assembly. The blade is used to cut off the sprue formed in the glue inlet channel and the product formed in the injection mold cavity. The double driving member configuration synchronously applies force to the blade to make the force on the blade more uniform, effectively prevents the blade from deviating or shaking due to uneven force in the cutting process, improves the cutting quality, and improves the flatness of the product cut.

[0011] Preferably, the front mold assembly comprises a front mold seat and at least two sliding seats. The two sliding seats are arranged on both sides of the bottom of the front mold seat. The sliding seat is connected with the front mold seat through an inclined guide column. A plurality of first cores are arranged in the middle of the bottom of the front mold seat. A plurality of second cores are arranged on the sliding seat. The end of the first core away from the front mold seat is an inclined surface. The end of the second core away from the sliding seat is also an inclined surface. The first core and the second core cooperatively form a corner structure. When the front mold assembly and the rear mold assembly abut against each other, the first core and the second core are placed in the injection mold cavity along with the movement of the front mold assembly.

[0012] Preferably, the first core is provided with a protrusion on the inclined surface thereof, and the second core is provided with a groove matched with the protrusion on the inclined surface thereof.

[0013] Preferably, a plurality of connecting rods are arranged in the front mold seat along the length direction of the front mold seat, and the connecting rods are connected with the first cores.

[0014] Preferably, the first core is perpendicular to the bottom surface of the front mold base, and the second core is parallel to the bottom surface of the front mold base, and the first core and the second core cooperate to form a 90° corner structure.

[0015] Preferably, the rear mold assembly includes a rear mold base and a support base, the support base is arranged above the rear mold base, the support base is connected with the rear mold base through a support column, one end of the support column is fixed to the rear mold base, the other end of the support column is inserted into the positioning hole of the front mold base, and the cutting assembly is fixed to the support base.

[0016] Preferably, a cavity is formed between the support base and the rear mold base, a ejector assembly is arranged in the cavity, the ejector assembly is used to eject the product from the injection molding cavity, the ejector assembly includes an ejector mounting plate, an ejector pin and a guide column, the ejector mounting plate is connected with the support base through the guide column, a return spring is sleeved on the guide column, one end of the ejector pin is fixed to the ejector mounting plate, the other end of the ejector pin abuts against the product, the ejector pin is used to eject the molded product from the injection molding cavity, and the ejector mounting plate is driven by a driving shaft of a molding machine to reciprocate along the PC direction.

[0017] Preferably, a cooling assembly is arranged in the cavity, the cooling assembly includes a cooling pipeline and a cooling liquid, the cooling liquid is filled in the cooling pipeline, and the cooling pipeline is connected with an external cooling circulation system. These cooling liquids can absorb and carry away heat, effectively shorten the product molding time, and accelerate the production cycle.

[0018] The beneficial effects are as follows: when the front mold assembly and the rear mold assembly are movably abutted and tightly abutted with each other during operation of the mold, a plurality of injection molding cavities are formed in the injection mold, the molten plastic enters the main flow channel from the glue inlet under high pressure, and then enters the injection molding cavities through the branch channels, and the cooling liquid is introduced to cool and solidify the product after pressure maintaining for a period of time. At this time, the cutting assembly moves upward along the PC shaft to simultaneously cut and separate all products and gates, and the products and gates are ejected from the injection molding cavities by the ejector assembly under the driving of the driving shaft of the molding machine after the mold is opened. The biggest difference from the existing mold is that the cutting assembly is improved in the application. The original separate shearing device is arranged below each gate, and the cutting assembly is fixed to the rear mold assembly. The blades are arranged along the length direction of the rear mold assembly to cover the outlet ends of all branch channels, so that simultaneous cutting of multiple products and gates can be realized, the production efficiency is improved, and the design saves more space compared with the separate shearing device. More injection molding cavities can be arranged in the limited space, more products can be produced in the same time, the production cost is reduced, and compared with the separate shearing device, the cutting assembly structure is simpler, is not easy to be damaged, and even if the cutting assembly structure is damaged, the parts can be easily replaced, and the maintenance cost is low. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings described herein are intended to provide further understanding of the present application, form a part of the present application, and the illustrative embodiments of the present application and the description thereof are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0020] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0021] Figure 2 It is a schematic diagram of the structure of the front mold assembly and the rear mold assembly of the present application when separated;

[0022] Figure 3 It is a sectional view of the front mold assembly of the present application;

[0023] Figure 4 It is a sectional view of the rear mold assembly of the present application;

[0024] Figure 5 It is a schematic diagram of the partial structure of the present application;

[0025] Figure 6 It is a schematic diagram of the cutting assembly structure of the present application;

[0026] Figure 7 It is a schematic diagram of the position relationship of the first core, the second core, the glue inlet channel and the ejector pin of the present application;

[0027] Figure 8 It is a schematic diagram of the structure of the first core and the second core of the present application;

[0028] In the drawings:

[0029] 0, product;

[0030] 1, front mold assembly; 11, glue inlet; 12, front mold base; 121, positioning hole; 122, connecting rod; 123, first core; 1231, protrusion; 13, sliding base; 131, second core; 1311, groove; 14, inclined guide column;

[0031] 2, rear mold assembly; 21, rear mold base; 22, support base; 23, support column;

[0032] 3, injection molding cavity;

[0033] 4, glue inlet channel; 41, main flow channel; 42, branch channel;

[0034] 5, cutting assembly; 51, fixed base; 52, driving member; 53, blade; 531, notch;

[0035] 6, ejector pin assembly; 61, ejector pin mounting plate; 62, ejector pin; 63, guide column; 631, return spring;

[0036] 7, cooling assembly; 71, cooling pipeline. DETAILED DESCRIPTION

[0037] The present application will be described with respect to the drawings in which the various embodiments of the application are shown for the purpose of illustrating the general principles of the application. The application should be understood to include all novel equivalents as defined by statute.

[0038] It should be noted that the terms "upper", "lower", "right", "left", "front", "rear", and the like as can be used herein are intended to be used for convenience and are not intended to limit the application. The use of these terms is specifically not intended to confer, in any way, a relative importance on one part versus another. In addition, the use of "first", "second", and the like in the description is intended to be used for convenience and is not intended to limit the application. The use of these terms is specifically not intended to confer, in any way, a relative importance on one part versus another.

[0039] In addition, the terms "first", "second", and the like, used in the description and in the claims are intended to be used for clarity in distinguishing between two or more different elements or steps in the figures and / or the claims. These terms are not necessarily intended to convey a sequential order of importance, unless explicitly stated. Further, the use of the terms "first", "second", and the like, are not necessarily used herein to denote a quantity or amount, or to denote different elements or steps in a process, unless explicitly stated. Thus, these terms are used merely as a label to distinguish between two separately related elements or steps in the presentation of a detailed description of various embodiments of the application.

[0040] Embodiment

[0041] Referring to Figure 1 , Figure 1 is a schematic diagram of the overall structure of the present application. The embodiment provides a multi-cavity automatic gate cutting molding die including a front mold assembly 1 and a rear mold assembly 2, wherein the front mold assembly 1 is provided with a glue injection port 11, the rear mold assembly 2 is movably abutted against the front mold assembly 1, and a plurality of injection molding cavities 3 are formed between the front mold assembly 1 and the rear mold assembly 2 when the front mold assembly 1 and the rear mold assembly 2 are abutted against each other.

[0042] Referring to Figure 1 , in order to facilitate the understanding of the embodiment, a coordinate system is established, taking P as the origin, PA as the first direction, PB as the second direction, and PC as the third direction. The first direction and the second direction are parallel to the same plane and perpendicular to each other, and the third direction is perpendicular to the first direction and the second direction. The present application defines the plane composed of the PA direction and the PB direction as the horizontal plane.

[0043] Referring to Figure 7 ,Figure 7 Figure 1 is a schematic diagram of the first core, the second core, the glue inlet channel and the position relationship of the ejector pin of the present application. The glue inlet channel 4 is arranged on the rear mold assembly 2, the glue inlet channel 4 includes a main flow channel 41 and a plurality of branch channels 42 distributed on both sides of the main flow channel 41, the branch channels 42 are in communication with the main flow channel 41, the inlet end of the main flow channel 41 is in communication with the glue injection port 11, and the outlet end of each branch channel 42 is in communication with one injection mold cavity 3.

[0044] Referring back to Figure 1 Further combined with Figure 2 And Figure 6 , Figure 2 Figure 2 is a schematic diagram of the structure of the front mold assembly and the rear mold assembly of the present application when they are separated, Figure 6 Figure 3 is a schematic diagram of the structure of the cutting assembly of the present application. The cutting assembly 5 is arranged on the rear mold assembly 2 and located below the outlet end of the branch channel 42, the cutting assembly 5 includes a fixed seat 51, a driving member 52 and a blade 53, the fixed seat 51 is fixed on the rear mold assembly 2, the driving member 52 is fixed on the fixed seat 51, the driving end of the driving member 52 is connected with the blade 53, the driving member 52 in the present application selects an oil cylinder or a synchronous motor, the blade 53 is provided with a plurality of notches 531 along its length direction, i.e. PB axis direction, each notch 531 corresponds to the outlet end of one branch channel 42, and each notch 531 is arranged between the injection mold cavity 3 and the outlet end of the branch channel 42. Referring back to Figure 6 The cross section of the blade 53 perpendicular to its length direction, i.e. PB axis direction, is trapezoidal, and the notch 531 is processed into a blade structure by thinning. Designing the cross section of the blade 53 into a trapezoidal shape can increase the thickness of the whole blade 53, improve the rigidity and durability of the blade 53, disperse the stress generated in the cutting process, prolong the overall service life of the blade 53, protect the non-cutting parts, and ensure that the blade 53 has higher cutting efficiency and precision in the key area.

[0045] Referring back to Figure 2 Both the fixed seat 51 and the driving member 52 are provided with at least two, the two fixed seats 51 are respectively fixed on both ends of the rear mold assembly 2, the two driving members 52 are respectively fixed on the two fixed seats 51, the driving ends of the two driving members 52 are connected with the same blade 53, and the two driving members 52 synchronously drive the blade 53 to reciprocate along the length direction of the rear mold assembly 2, i.e. PB axis direction. The blade 53 is used to cut off the sprue formed in the glue inlet channel 4 and the product 0 formed in the injection mold cavity 3. The configuration of the double driving members 52 synchronously applies force to the blade 53, so that the blade 53 is more evenly stressed, effectively prevents the blade 53 from deviating or shaking due to uneven stress in the cutting process, improves the cutting quality, and improves the flatness of the product 0.

[0046] Referring back to Figure 2 Further combined with Figure 3 ,Figure 3 The figure is a sectional view of the front mold assembly. The front mold assembly 1 comprises a front mold base 12 and at least two sliding seats 13, two sliding seats 13 are arranged on both sides of the bottom of the front mold base 12, and in this application, the sliding seats 13 are four, four sliding seats 13 are arranged on both sides of the bottom of the front mold base 12, two sliding seats 13 are arranged on each side on average, the sliding seat 13 is connected with the front mold base 12 through the inclined guide column 14, the sliding seat 13 and the front mold base 12 are both provided with an insertion hole matched with the inclined guide column 14, both ends of the inclined guide column 14 are embedded into the corresponding insertion hole, and the inclined angle between the inclined guide column 14 and the PC shaft is 38-108°. If the inclined angle is too small, not only will the inclined guide column 14 need to travel a long distance to complete the required lateral movement during mold opening, increasing the overall size of the mold, but also the inclined guide column 14 will bear a larger lateral component force, increasing the wear of the inclined guide column 14; if the inclined angle is too large, it will also increase the vertical component force borne by the inclined guide column 14, affecting the stability and speed of product demolding; therefore, a suitable inclined angle is more conducive to improving the working efficiency and service life of the mold.

[0047] Please refer to Figure 5 , Figure 5 The figure is a schematic diagram of the local structure. Along the length direction of the front mold base 12, that is, the PB axis direction, a plurality of connecting rods 122 are arranged in the front mold base 12, a plurality of first cores 123 are connected to the connecting rods 122, the plurality of first cores 123 are located in the middle of the bottom of the front mold base 12, a plurality of second cores 131 are arranged on the sliding seat 13, the end of the first core 123 away from the front mold base 12 is an inclined surface, and the end of the second core 131 away from the sliding seat 13 is also an inclined surface. The first core 123 and the second core 131 form a corner structure by mutual cooperation, when the front mold assembly 1 and the rear mold assembly 2 are tightly abutted, the first core 123 and the second core 131 are placed in the injection molding cavity 3 by moving the front mold assembly 1. This design can be used to make elbows, and the angle between the first core 123 and the PC shaft and the angle between the second core 131 and the PA shaft can be adjusted according to actual needs to make different models of elbow products. Please refer to Figure 8 , Figure 8Fig. 1 is a schematic view of the first core and the second core structure of the present application. The first core 123 is provided with a protrusion 1231 on its inclined surface, and the second core 131 is provided with a groove 1311 matching the protrusion 1231 on its inclined surface. When the front mold assembly 1 and the rear mold assembly 2 are tightly closed, the protrusion 1231 is inserted into the groove 1311. The precise matching of the protrusion 1231 and the groove 1311 not only provides better sealing effect when the mold is closed, reducing the occurrence of burrs and other phenomena in the molded product, but also plays an auxiliary positioning role, ensuring that the same position is reached every time the mold is closed, thereby improving product consistency. In the present application, the first core 123 is perpendicular to the bottom surface of the front mold seat 12, i.e., the included angle between the first core 123 and the PC axis is 0°, and the second core 131 is parallel to the bottom surface of the front mold seat 12, i.e., the included angle between the second core 131 and the PA axis is 0°. The first core 123 and the second core 131 cooperate to form a 90° corner structure. At this time, the product produced is a 90° elbow.

[0048] Referring back to Figure 2 and Figure 5 , the rear mold assembly 2 includes a rear mold seat 21 and a support seat 22. The support seat 22 is arranged above the rear mold seat 21 and is connected to the rear mold seat 21 through a support column 23. One end of the support column 23 is fixed to the rear mold seat 21, and the other end is inserted into the positioning hole 121 of the front mold seat 12 through the support seat 22. The cutting assembly 5 is fixed to the support seat 22. Referring back to Figure 7 Referring back to Figure 4 , Figure 4 Fig. 4 is a sectional view of the rear mold assembly of the present application. A cavity is formed between the support seat 22 and the rear mold seat 21. A ejector pin assembly 6 is arranged in the cavity. The ejector pin assembly 6 is used to eject the product 0 from the injection molding cavity 3. The ejector pin assembly 6 includes an ejector pin mounting plate 61, an ejector pin 62, and a guide column 63. The ejector pin mounting plate 61 is connected to the support seat 22 through the guide column 63. A return spring 631 is sleeved on the guide column 63. One end of the ejector pin 62 is fixed to the ejector pin mounting plate 61, and the other end of the ejector pin 62 abuts against the product 0. The ejector pin 62 is used to eject the molded product 0 from the injection molding cavity 3. The ejector pin mounting plate 61 is driven by the driving shaft of the molding machine to reciprocate along the PC direction. In the present application, a high-temperature-resistant silicone sleeve can be arranged at the end of the ejector pin 62 abutting against the product 0 to avoid direct contact between the ejector pin and the product, which can cause mechanical damage to the product. The high-temperature-resistant silicone sleeve can also protect the ejector pin from wear and tear. If the high-temperature-resistant silicone sleeve is worn or damaged, it can be easily replaced.

[0049] Referring back to Figure 5 A cooling assembly 7 is arranged in the cavity. The cooling assembly 7 includes a cooling pipeline 71 and a cooling liquid. The cooling liquid is filled in the cooling pipeline 71. The cooling pipeline 71 is connected to an external cooling circulation system. These cooling liquids can absorb and carry away heat, effectively shortening the molding time of the product 0 and accelerating the production cycle.

[0050] In summary, when the front mold assembly 1 and the rear mold assembly 2 are movably abutted and tightly abutted with each other during operation of the mold, a plurality of injection cavities 3 are formed in the injection mold, the molten plastic enters the main flow channel 41 from the glue inlet 11 under high pressure, and then enters each injection cavity 41 through each branch channel 42, respectively, and is cooled and solidified by cooling liquid after pressure maintaining for a period of time. At this time, the cutting assembly 5 is moved upward along the PC shaft to simultaneously cut and separate all products and gates, and after the mold is opened, the products and gates are ejected from the injection cavity 41 by the ejector pin assembly 6 driven by the driving shaft of the molding machine. The biggest difference from the existing mold is that the cutting assembly 5 is improved in the present application. The original separate shearing device is set below each gate, and the cutting assembly 5 is fixed on the rear mold assembly 2. The blade 53 is arranged along the length direction of the rear mold assembly 2 to cover the outlet ends of all branch channels 42, so that the plurality of products and gates can be simultaneously cut, the production efficiency is improved, and the space is saved compared with the separate shearing device. More injection cavities 3 can be arranged in the limited space, more products can be produced in the same time, the production cost is reduced, and compared with the separate shearing device, the cutting assembly structure is simpler, is not easy to be damaged, even if the cutting assembly structure is damaged, the parts can be easily replaced, and the maintenance cost is low.

[0051] The above is only an embodiment of the present application and is not used to limit the present application. The present application can be variously changed and modified for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made in the spirit and principle of the present application shall be included in the scope of the claims of the present application.

Claims

1. A multi-cavity automatic cut gate forming mold characterized by, The utility model relates to a multi-cavity injection mould, comprising: a front mould assembly (1) provided with a glue injection port (11); a rear mould assembly (2) movably abutting against the front mould assembly (1), and a plurality of injection cavities (3) being formed between the front mould assembly (1) and the rear mould assembly (2) when the front mould assembly (1) and the rear mould assembly (2) abut against each other; a glue inlet channel (4) provided on the rear mould assembly (2), the glue inlet channel (4) comprising a main flow channel (41) and a plurality of branch channels (42) distributed on both sides of the main flow channel (41), the branch channels (42) being in communication with the main flow channel (41), the inlet end of the main flow channel (41) being in communication with the glue injection port (11), and the outlet end of each branch channel (42) being in communication with one injection cavity (3); a cutting assembly (5) provided on the rear mould assembly (2) and located below the outlet end of the branch channel (42), the cutting assembly (5) comprising a fixing seat (51), a driving member (52) and a blade (53), the fixing seat (51) being fixed on the rear mould assembly (2), the driving member (52) being fixed on the fixing seat (51), the driving end of the driving member (52) being connected with the blade (53), and the blade (53) being provided with a plurality of notches (531) along the length direction thereof, each notch (531) corresponding to the outlet end of one branch channel (42), and each notch (531) being arranged between the injection cavity (3) and the outlet end of the branch channel (42).

2. The multi-cavity automatic-gating mold of claim 1, wherein, The cross section of the blade (53) perpendicular to the length direction thereof is trapezoidal, and the notch (531) is processed into a blade structure by thinning.

3. The multi-cavity automatic-gating mold of claim 1, wherein, The fixing seat (51) and the driving member (52) are each provided with at least two, the two fixing seats (51) being respectively fixed on both ends of the rear mould assembly (2), the two driving members (52) being respectively fixed on the two fixing seats (51), the driving ends of the two driving members (52) being connected with the same blade (53), and the two driving members (52) synchronously driving the blade (53) to reciprocate along the length direction of the rear mould assembly (2).

4. The multi-cavity automatic-gating mold of claim 1, wherein, The front mould assembly (1) comprises a front mould seat (12) and at least two sliding seats (13), the two sliding seats (13) being arranged on both sides of the bottom of the front mould seat (12), the sliding seat (13) being connected with the front mould seat (12) through an inclined guide column (14), a plurality of first cores (123) being arranged in the middle of the bottom of the front mould seat (12), a plurality of second cores (131) being arranged on the sliding seat (13), the end of the first core (123) away from the front mould seat (12) being an inclined surface, the end of the second core (131) away from the sliding seat (13) also being an inclined surface, the first core (123) and the second core (131) cooperating to form a corner structure, and the first core (123) and the second core (131) being arranged in the injection cavity (3) when the front mould assembly (1) and the rear mould assembly (2) abut against each other.

5. The multi-cavity automatic-gating mold of claim 4, wherein, The first core (123) is provided with a protrusion (1231) on its inclined surface, and the second core (131) is provided with a groove (1311) matched with the protrusion (1231) on its inclined surface.

6. The multi-cavity automatic-gating mold of claim 4, wherein, A plurality of connecting rods (122) parallel to each other are arranged in the front mold base (12) along the length direction of the front mold base (12), and a plurality of first cores (123) are connected to the connecting rods (122).

7. The multi-cavity automatic-gating mold of claim 5, wherein, The first core (123) is perpendicular to the bottom surface of the front mold base (12), and the second core (131) is parallel to the bottom surface of the front mold base (12), and the first core (123) and the second core (131) cooperatively form a 90° corner structure.

8. The multi-cavity automatic-gating mold of claim 4, wherein, The rear mold assembly (2) comprises a rear mold base (21) and a support base (22), the support base (22) is arranged above the rear mold base (21), the support base (22) is connected to the rear mold base (21) through a support column (23), one end of the support column (23) is fixed to the rear mold base (21), and the other end of the support column (23) penetrates through the support base (22) and is inserted into the positioning hole (121) of the front mold base (12), and the cutting assembly (5) is fixed to the support base (22).

9. The multi-cavity automatic-gating mold of claim 8, wherein, A cavity is formed between the support base (22) and the rear mold base (21), a ejector pin assembly (6) is arranged in the cavity, the ejector pin assembly (6) comprises an ejector pin mounting plate (61), an ejector pin (62) and a guide column (63), the ejector pin mounting plate (61) is connected to the support base (22) through the guide column (63), a return spring (631) is sleeved on the guide column (63), one end of the ejector pin (62) is fixed to the ejector pin mounting plate (61), the other end of the ejector pin (62) abuts against the product (0), and the ejector pin mounting plate (61) is driven to reciprocate along the PC direction by a driving shaft of a molding machine.

10. The multi-cavity automatic-gating mold of claim 9, wherein, A cooling assembly (7) is arranged in the cavity, the cooling assembly (7) comprises a cooling pipeline (71) and a cooling liquid, the cooling liquid is filled in the cooling pipeline (71), and the cooling pipeline (71) is connected to an external cooling circulation system.

Images