A mold for injection molding product with USB port and no draft angle and its manufacturing process

Abstract

The invention relates to the field of mold technology, and specifically to a mold for an injection molding product with a USB port and no draft angle, and a manufacturing process thereof. The mold comprises an upper mold component, a lower mold component, a glue feed component, a push rod component and a mold core, wherein the upper mold component and the lower mold component cooperate with each other; the glue feed component is arranged on the upper mold component, the push rod component is arranged on the lower mold component, the mold core is arranged between the upper mold component and the lower mold component, and the glue feed component and the push rod component are respectively docked with the mold core, and the mold core comprises an upper mold core and a lower mold core, the upper mold core is provided with a cavity chamber penetrating the upper and lower ends, the upper end of the lower mold core is provided with a cavity body sleeved in the cavity chamber, and a USB imitation block is provided at the upper end of the cavity body; through the above-mentioned structural arrangement, not only can the demoulding operation without a draft angle be completed, but also the water inlet position can be automatically pulled off, and the defects after pulling off remain inside the upper cover, which does not affect the appearance of the upper cover, and can improve the production efficiency and quality of the upper cover.

Description

Technical Field

[0001] The invention relates to the technical field of molds, in particular to a mold for an injection molding product with a USB port and no draft angle and a manufacturing process thereof. Background Art

[0002] With the continuous advancement of science and technology, intelligent equipment covers all walks of life. At present, when using intelligent equipment, it is necessary to power or charge the intelligent equipment. Taking a mobile phone as an example, when charging a mobile phone, a charger is needed. The shell used by the charger is made by mold injection molding, which includes a base with a fixed circuit and an upper cover arranged on the base. A USB port is arranged on the upper cover for connecting a USB cable. When the prior art makes the upper cover by a mold, in order to make the upper cover demold smoothly, a telescopic slide structure is made on the side of the cavity or a draft angle treatment is made on the mold, so that the upper cover can be removed smoothly after the mold is opened; however, the use of a slide will lead to problems such as complex structure of the mold, too high precision requirements, complex mold-saving process, and high cost. The use of an inclination treatment will lead to a large product size and a small volume. In addition, in the production and processing process, it is difficult to stack and sort the upper cover with an inclination, which is not conducive to batch packaging;

[0003] In the prior art, when making the upper cover by a mold, a gate, i.e., a water gate, needs to be set on the outside of the product. After the mold is opened, the water gate needs to be cut. After the water gate is cut, the product will have defects at the water gate position, affecting the appearance. If the defects need to be removed, a grinding and polishing process is required, which is not only troublesome, but also greatly increases the cost of the product.

[0004] In order to solve the above problems, the prior art proposes a mold with no draft angle for product appearance as described in announcement number: CN206953443, but the mold can only solve the problem of external surface defects but cannot solve the trouble caused by the slide position; therefore, it is necessary to propose a technical solution to solve the above problems. Summary of the invention

[0005] In order to overcome the above-mentioned shortcomings, the present invention aims to provide a technical solution that can solve the above-mentioned problems.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a mold for an injection molding product with a USB port and no draft angle, comprising an upper mold assembly, a lower mold assembly, a glue-injection assembly, a push rod assembly and a mold core, wherein the upper mold assembly and the lower mold assembly cooperate with each other; the glue-injection assembly is arranged on the upper mold assembly, the push rod assembly is arranged on the lower mold assembly, the mold core is arranged between the upper mold assembly and the lower mold assembly, and the glue-injection assembly and the push rod assembly are respectively connected to the mold core, the mold core comprises an upper mold core and a lower mold core, the upper mold core is provided with a cavity chamber penetrating the upper and lower ends, and the upper end of the lower mold core is provided with a sleeve A cavity body in the cavity chamber is provided with a USB profiling block at the upper end of the cavity body, and a sprue profiling groove is provided on the cavity body at a side position of the USB profiling block; a glue inlet assembly is provided with a glue inlet channel docking with the sprue profiling groove, and the lower end surface of the glue inlet assembly is sealed with the upper end of the upper mold core; the upper mold assembly is provided with a first mold core chamber for installing the upper mold core and a glue inlet chamber located at the upper end of the first mold core chamber, the glue inlet assembly is provided on the glue inlet chamber, and the glue inlet assembly is docked with the upper mold core; the upper mold assembly is also provided with an air blowing pipe, which is connected to the glue inlet chamber.

[0007] Preferably, both the upper mold assembly and the lower mold assembly are provided with sliding limit holes, and sliding limit rods are provided in the sliding limit holes, and the upper mold assembly and the lower mold assembly cooperate with each other through the sliding limit rods.

[0008] Preferably, the upper mold assembly includes a panel, a first sprue plate, a second sprue plate and an upper mold mounting plate, the glue inlet assembly includes a pouring gate profiling block, a pouring channel profiling block, a waste slag unloading block and a sprue cut-off block, the panel, the first sprue plate, the second sprue plate and the upper mold mounting plate are assembled from top to bottom by sliding a limit rod, and the glue inlet channel is through-set on the pouring gate profiling block, the pouring channel profiling block, the waste slag unloading block and the sprue cut-off block; wherein the first mold core chamber is set at the lower end of the upper mold mounting plate, the glue inlet chamber is set at the upper end of the upper mold mounting plate, and the glue inlet chamber is upwardly connected to the second sprue plate, the first sprue plate and the panel; the pouring gate profiling block and the pouring channel profiling block are both set In the glue inlet chamber on the panel, the lower end of the pouring gate prototyping block is docked with the upper end of the pouring channel prototyping block, and the lower part of the pouring channel prototyping block is slidably matched with the glue inlet chamber on the first nozzle plate; the waste slag unloading block is arranged in the glue inlet chamber on the first nozzle plate, the upper end of the waste slag unloading block is docked with the lower end of the pouring channel prototyping block, and the lower part of the waste slag unloading block is slidably matched with the glue inlet chamber on the second nozzle plate, the nozzle cut-off block is arranged in the glue inlet chamber on the second nozzle plate, the upper end of the nozzle cut-off block is docked with the lower end of the waste slag unloading block, the lower part of the nozzle cut-off block is slidably matched with the glue inlet chamber on the upper mold mounting plate, and the lower end of the nozzle cut-off block is docked with the upper end of the upper mold core.

[0009] Preferably, the lower mold assembly includes a base plate, a supporting square iron and a lower mold mounting plate, the supporting square iron is fixedly mounted on the base plate, the sliding limit rod is arranged on the supporting square iron, and the lower mold mounting plate is limited on the supporting square iron by the sliding limit rod; the lower mold mounting plate is provided with a second mold core chamber for mounting the lower mold core and a telescopic through hole for connecting the push rod assembly; the push rod assembly includes an ejector pin fixing plate, an ejector pin, a push block and a driving mechanism, the driving mechanism is fixedly mounted on the lower mold mounting plate, the ejector pin fixing plate is dynamically connected to the driving mechanism, the ejector pin is mounted on the ejector pin fixing plate, and the ejector pin is slidably connected to the telescopic through hole, the push block is arranged at the upper end of the ejector pin and corresponds to the lower end of the cavity body.

[0010] Preferably, the lower mold assembly also includes a push plate, which is limited between the lower mold mounting plate and the upper mold mounting plate by a sliding limit rod. A third mold core chamber that slides with the lower mold core is provided on the push plate, and the upper end of the third mold core chamber corresponds to the lower end of the cavity body.

[0011] A manufacturing process of an injection molded product with a USB port and no draft angle, comprising the mold of the injection molded product with a USB port and no draft angle as described above, comprising the following steps:

[0012] Step 1: Install the mold, connect the blowing device to the blowing pipe of the mold, and connect the injection molding machine to the glue inlet component of the mold;

[0013] Step 2: Prepare the injection molding material, put the injection molding material into the injection molding mixer for high-temperature stirring to make liquid injection molding material;

[0014] Step 3: Injecting the injection molding material, injecting the liquid injection molding material prepared in step 2 into the mold cavity through the injection molding machine along the glue inlet component, and cooling and molding after the injection is completed;

[0015] Step 4: Open the mold in sequence. The mold opening is carried out in the following order:

[0016] 1) Open the second nozzle plate, which drives the nozzle cut-off block upward to break the nozzle at the nozzle profiling groove;

[0017] 2) Open the first sprue plate, the waste slag discharge block rises, and the waste slag is extracted from the glue inlet channel of the sprue cut-off block;

[0018] 3) Drive the blowing device, which blows air along the blowing pipe, so that the gas enters the glue feeding chamber along the blowing pipe to quickly cool the upper end of the injection molded workpiece;

[0019] 4) Open the panel, the pouring channel profiling block rises and separates from the waste slag in the pouring channel, and the waste slag is discharged downward along the glue inlet channel of the waste slag discharge block, completing the automatic waste slag discharge operation;

[0020] 5) Open the push plate, which drives the upper mold mounting plate upward, pushes the upper mold mounting plate upward, and at the same time pushes the lower end of the injection molded workpiece through the third mold core chamber to push the injection molded workpiece upward to complete the retraction operation;

[0021] 6) Open the upper mold mounting plate, and separate the upper mold mounting plate from the injection molded workpiece;

[0022] 7) The driving mechanism drives the ejector fixing plate upward, thereby driving the ejector rod upward, causing the push block to rise and eject the injection molded workpiece.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The present application adopts an upper mold component, a lower mold component, a glue-injection component, a push rod component and a mold core, wherein a glue-injection chamber is arranged on the upper mold component, and a through-blowing pipe is arranged on the side of the glue-injection chamber; the mold core is provided with an upper mold core with a mold cavity and a lower mold core with a mold cavity body, a USB profiling block is arranged at the upper end of the mold cavity body, and a sprue profiling groove is arranged at the side position of the USB profiling block on the mold cavity body, and after injection molding, a connecting sprue is formed inwardly at the USB port position of the upper cover The raised part of the mold, when opening the mold, the glue inlet component rises first, the nozzle position is pulled off, and the defect remains at the position of the raised part, which does not affect the appearance of the upper cover; after the nozzle is pulled off, the air is blown into the air pipe to prevent the mold from sticking between the formed upper cover and the upper mold core; through the above-mentioned structural setting, it is possible to complete the demoulding operation without a draft angle, and the nozzle position can be automatically pulled off, and after pulling off, the defect remains inside the upper cover, which does not affect the appearance of the upper cover, and can improve the production efficiency and quality of the upper cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional cross-sectional structural schematic diagram of the present invention;

[0026] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention in a mold closing state;

[0027] Figure 3 The present invention Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0028] Figure 4 It is a schematic diagram of the cross-sectional state when the second nozzle plate is opened in step 4 of the present invention;

[0029] Figure 5 is a schematic diagram of a cross-sectional state when the first nozzle plate is opened in step 4 of the present invention;

[0030] Figure 6 is a schematic diagram of a cross-sectional state when the panel is opened in step 4 of the present invention;

[0031] Figure 7 It is a schematic diagram of the cross-sectional state when the push plate is opened in step 4 of the present invention;

[0032] Figure 8 It is a schematic diagram of the cross-sectional state when the upper mold mounting plate is opened in step 4 of the present invention;

[0033] Fig. 9 It is a schematic diagram of the cross-sectional state of the driving mechanism during driving in step 4 of the present invention.

[0034] The reference numerals and names in the figures are as follows:

[0035] 10-upper mold assembly, 20-lower mold assembly, 30-glue inlet assembly, 40-push rod assembly, 50-mold core, 11-panel, 12-first sprue plate, 13-second sprue plate, 14-upper mold mounting plate, 15-first mold core chamber, 16-glue inlet chamber, 17-blowing pipe, 21-bottom plate, 22-support square iron, 23-lower mold mounting plate, 24-push plate, 25-second mold core chamber, 26-sliding limit Position rod, 27-telescopic through hole, 28-third mold core chamber, 31-pouring gate imitation block, 32-pouring channel imitation block, 33-waste slag unloading block, 34-sprue cut-off block, 35-glue inlet channel, 41-driving mechanism, 42-thrower fixing plate, 43-thrower, 44-push block, 51-upper mold core, 52-lower mold core, 53-mold chamber, 54-mold cavity, 55-USB imitation block, 56-sprue imitation groove. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] See also Figures 1 to 9In an embodiment of the present invention, a mold for an injection molding product with a USB port and no draft angle includes an upper mold assembly 10, a lower mold assembly 20, a glue feed assembly 30, a push rod assembly 40 and a mold core 50. The upper mold assembly 10 and the lower mold assembly 20 cooperate with each other; the glue feed assembly 30 is arranged on the upper mold assembly 10, the push rod assembly 40 is arranged on the lower mold assembly 20, the mold core 50 is arranged between the upper mold assembly 10 and the lower mold assembly 20, and the glue feed assembly 30 and the push rod assembly 40 are respectively connected to the mold core 50, and the mold core 50 includes an upper mold core 51 and a lower mold core 52, and the upper mold core 51 is provided with a cavity chamber 53 that passes through the upper and lower ends, and the upper end of the lower mold core 52 is provided with a mold sleeved in the cavity chamber 53. The cavity 54 is provided with a USB profiling block 55 at the upper end of the cavity 54, and a sprue profiling groove 56 is provided on the cavity 54 at a side position of the USB profiling block 55; the glue inlet assembly 30 is provided with a glue inlet channel 35 docking with the sprue profiling groove 56, and the lower end surface of the glue inlet assembly 30 is sealed with the upper end of the upper mold core 51; the upper mold assembly 10 is provided with a first mold core chamber 15 for installing the upper mold core 51 and a glue inlet chamber 16 located at the upper end of the first mold core chamber 15, the glue inlet assembly 30 is arranged on the glue inlet chamber 16, and the glue inlet assembly 30 is docked with the upper mold core 51; the upper mold assembly 10 is also provided with an air blowing pipe 17, and the air blowing pipe 17 is connected to the glue inlet chamber 16.

[0038] In the above embodiment, the present application adopts an upper mold assembly 10, a lower mold assembly 20, a glue feed assembly 30, a push rod assembly 40 and a mold core 50, wherein a glue feed chamber 16 is provided on the upper mold assembly 10, and a through blow pipe 17 is provided on the side of the glue feed chamber 16; the mold core 50 is provided with an upper mold core 51 with a mold cavity 53 and a lower mold core 52 with a mold cavity 54, a USB profiling block 55 is provided at the upper end of the mold cavity 54, and a sprue profiling groove 56 is provided on the mold cavity 54 at the side position of the USB profiling block 55, and after injection molding, the USB port position of the upper cover is A raised portion connected to the sprue is formed inwardly (the structure of the sprue imitating groove 56 after injection molding). When opening the mold, the glue inlet component 30 rises first, the sprue position is broken, and the defect remains at the position of the raised portion, which does not affect the appearance of the upper cover; after the sprue is broken, the air blowing pipe 17 blows gas to prevent the mold from sticking between the molded upper cover and the upper mold core; through the above-mentioned structural setting, it is possible to complete the demoulding operation without a draft angle, and the sprue position can be automatically broken, and the defect remains inside the upper cover after breaking, which does not affect the appearance of the upper cover, and can improve the production efficiency and quality of the upper cover.

[0039] Further Figure 2As shown, both the upper mold assembly 10 and the lower mold assembly 20 are provided with sliding limit holes, and sliding limit rods 26 are provided in the sliding limit holes. The upper mold assembly 10 and the lower mold assembly 20 cooperate with each other through the sliding limit rods 26; in this embodiment, the positions of the upper mold assembly 10 and the lower mold assembly 20 are limited by providing sliding limit holes and cooperating with the sliding limit rods 26, so that the upper mold assembly 10 and the lower mold assembly 20 can be accurately docked.

[0040] Further Figure 1-2As shown, the upper mold assembly 10 includes a panel 11, a first sprue plate 12, a second sprue plate 13 and an upper mold mounting plate 14, and the glue inlet assembly 30 includes a pouring gate profiling block 31, a pouring channel profiling block 32, a waste slag unloading block 33 and a sprue cut-off block 34. The panel 11, the first sprue plate 12, the second sprue plate 13 and the upper mold mounting plate 14 are assembled from top to bottom by sliding a limit rod 26, and the glue inlet channel 35 is arranged on the pouring gate profiling block 31, the pouring channel profiling block 32, the waste slag unloading block 33 and the sprue cut-off block 34; wherein, the first mold core chamber 15 is arranged at the lower end of the upper mold mounting plate 14, the glue inlet chamber 16 is arranged at the upper end of the upper mold mounting plate 14, and the glue inlet chamber The chamber 16 is upwardly connected to the second nozzle plate 13, the first nozzle plate 12 and the panel 11; the pouring gate profiling block 31 and the pouring channel profiling block 32 are both arranged in the glue inlet chamber 16 on the panel 11, the lower end of the pouring gate profiling block 31 is docked with the upper end of the pouring channel profiling block 32, and the lower part of the pouring channel profiling block 32 is slidably matched with the glue inlet chamber 16 on the first nozzle plate 12; the waste residue discharge block 33 is arranged in the glue inlet chamber 16 on the first nozzle plate 12, the upper end of the waste residue discharge block 33 is docked with the lower end of the pouring channel profiling block 32, and the lower part of the waste residue discharge block 33 is slidably matched with the glue inlet chamber 16 on the second nozzle plate 13, and the nozzle cut-off block 34 is arranged at the second nozzle In the glue inlet chamber 16 on the plate 13, the upper end of the nozzle cut-off block 34 is docked with the lower end of the waste slag discharge block 33, the lower part of the nozzle cut-off block 34 is slidably matched with the glue inlet chamber 16 on the upper mold mounting plate 14, and the lower end of the nozzle cut-off block 34 is docked with the upper end of the upper mold core 51; in this embodiment, the nozzle cut-off block 34 is arranged in the glue inlet chamber 16 on the second nozzle plate 13, after the mold is opened, the second nozzle plate 13 is opened first, and the second nozzle plate 13 drives the nozzle cut-off block 34 upward, so that the nozzle position of the molded product can be pulled off; the waste slag discharge block 33 is arranged in the glue inlet chamber 16 on the first nozzle plate 12, and the pouring gate profiling block 31 and the pouring channel profiling block 32 are both arranged In the glue inlet chamber 16 on the panel 11, after the water outlet position is pulled off, the panel 11 is opened again, so that the panel 11 drives the pouring channel imitation block 32 upward, and the slag remains in the slag discharge block 33. In order to ensure that the slag remains in the slag discharge block 33, an expansion part can be provided at the position of the glue inlet 35 at the lower end of the slag discharge block 33, so that the formed slag is restricted by the expansion part and will not be driven by the downward rise of the pouring channel imitation block 32. The slag remaining in the slag discharge block 33 will slide down along the pouring channel of the slag discharge block 33 and out of the slag discharge block 33 due to the small resistance. Therefore, through this design, the slag can be controlled to automatically detach after the mold is opened, thereby accelerating the production rate of the product.

[0041] Further Figure 1-2As shown, the lower mold assembly 20 includes a bottom plate 21, a supporting square iron 22 and a lower mold mounting plate 23. The supporting square iron 22 is fixedly mounted on the bottom plate 21, and a sliding limit rod 26 is arranged on the supporting square iron 22. The lower mold mounting plate 23 is limited on the supporting square iron 22 by the sliding limit rod 26; the lower mold mounting plate 23 is provided with a second mold core chamber 25 for mounting the lower mold core 52 and a telescopic through hole 27 for connecting the push rod assembly 40; the push rod assembly 40 includes an ejector fixing plate 42, an ejector 43, a push block 44 and a driving mechanism 41 The driving mechanism 41 is fixedly mounted on the lower mold mounting plate 23, the ejector fixing plate 42 is dynamically connected to the driving mechanism 41, the ejector rod 43 is mounted on the ejector fixing plate 42, and the ejector rod 43 is slidably connected to the telescopic through hole 27, and the push block 44 is arranged at the upper end of the ejector rod 43 and corresponds to the lower end of the cavity 54; in this embodiment, after the mold is opened, the push block 44 is driven to rise by the driving mechanism 41, and the formed upper cover is pushed upward out of the cavity 54 of the lower mold core 52, thereby completing the unloading operation of the upper cover.

[0042] Further Figure 1-2 As shown, the lower mold assembly 20 also includes a push plate 24, which is limited between the lower mold mounting plate 23 and the upper mold mounting plate 14 by a sliding limit rod 26, and a third mold core chamber 28 is provided on the push plate 24 to slide and fit with the lower mold core 52, and the upper end of the third mold core chamber 28 corresponds to the lower end of the cavity 54; in the above embodiment, by providing the push plate 24, during the mold opening process, the upper mold core 51 is first opened by the push of the push plate 24, and at the same time, the push plate 24 will drive the push block 44 to move together The upper cover rises along with the upper mold core 51 for a certain distance. At this time, the upper cover is still located in a closed space, so that the air blowing pipe generates a certain air pressure in the space, so that the upper cover can be cooled and shrunk first, and then the upper mold mounting plate 14 is opened, so that the upper mold mounting plate 14 drives the upper mold core 51 upward. At this time, a part of the molded upper cover has been separated from the cavity 54. At this time, the molded upper cover is pushed out of the cavity 54 by the push block 44. This operation can make the demolding of the upper cover stable.

[0043] A manufacturing process of an injection molded product with a USB port and no draft angle, comprising the mold of the injection molded product with a USB port and no draft angle as described above, comprising the following steps:

[0044] Step 1: Install the mold, connect the blowing device to the blowing pipe 17 of the mold, and connect the injection molding machine to the glue inlet component 30 of the mold;

[0045] Step 2: Prepare the injection molding material, put the injection molding material into the injection molding mixer for high-temperature stirring to make liquid injection molding material;

[0046] Step 3: Injecting the injection molding material, injecting the liquid injection molding material prepared in step 2 into the mold cavity 53 of the mold along the injection assembly 30 through the injection molding machine, and cooling and molding after the injection is completed;

[0047] Step 4: Open the mold in sequence. The mold opening is carried out in the following order:

[0048] 1) If Figure 4 As shown, the second nozzle plate 13 is opened, and the second nozzle plate 13 drives the nozzle cut-off block 34 upward, so that the nozzle at the nozzle profiling groove 56 is pulled off;

[0049] 2) If Figure 5 As shown, the first sprue plate 12 is opened, the waste slag discharge block 33 rises, and the waste slag is drawn out from the glue inlet channel 35 of the sprue cut-off block 34;

[0050] 3) driving the air blowing device to blow air along the air blowing pipe 17 so that the gas enters the glue feeding chamber 16 along the air blowing pipe 17 to quickly cool the upper end of the injection molded workpiece;

[0051] 4) If Figure 6 As shown, the panel 11 is opened, the pouring channel imitation block 32 rises and separates from the waste slag in the pouring channel, and the waste slag is discharged downward along the glue inlet channel 35 of the waste slag discharge block 33, completing the automatic waste slag discharge operation;

[0052] 5) If Figure 7 As shown, the push plate 24 is opened, and the push plate 24 drives the upper mold mounting plate 14 upward, pushing the upper mold mounting plate 14 upward, and at the same time, the lower end of the injection molded workpiece is pushed upward through the third mold core chamber 28 to complete the retraction operation;

[0053] 6) If Figure 8 As shown, the upper mold mounting plate 14 is opened, and the upper mold mounting plate 14 is separated from the injection molded workpiece;

[0054] 7) If Fig. 9 As shown, the driving mechanism 41 drives the ejector fixing plate 42 upward, thereby driving the ejector rod 43 upward, causing the push block 44 to rise, and ejecting the injection molded workpiece.

[0055] The present application adopts the above-mentioned mold for injection molding products with USB ports and no draft angle, and performs mold opening operations in a certain order, so that the molded upper cover can also achieve stable demolding operations without slope-assisted demolding, and can also achieve the breaking of the water outlet and the shedding of waste residues during the mold opening process, which is conducive to batch production and greatly improves the production efficiency of the product.

[0056] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and range of equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A mold for an injection molding product with a USB port and no draft angle, comprising an upper mold assembly, a lower mold assembly, a glue inlet assembly, a push rod assembly and a mold core, wherein the upper mold assembly and the lower mold assembly cooperate with each other; the glue inlet assembly is arranged on the upper mold assembly, the push rod assembly is arranged on the lower mold assembly, the mold core is arranged between the upper mold assembly and the lower mold assembly, and the glue inlet assembly and the push rod assembly are respectively connected to the mold core, characterized in that: The mold core comprises an upper mold core and a lower mold core, the upper mold core is provided with a mold cavity penetrating the upper and lower ends, the upper end of the lower mold core is provided with a mold body sleeved in the mold cavity, a USB profiling block is provided at the upper end of the mold cavity body, and a sprue profiling groove is provided on the mold cavity body at a side position of the USB profiling block; the glue inlet assembly is provided with a glue inlet channel docking the sprue profiling groove, and the lower end face of the glue inlet assembly is sealed with the upper end of the upper mold core; the upper mold assembly is provided with a first mold core cavity for installing the upper mold core and a glue inlet cavity located at the upper end of the first mold core cavity, the glue inlet assembly is arranged on the glue inlet cavity, and the glue inlet assembly is docked with the upper mold core; the upper mold assembly is also provided with an air blowing pipe, which is connected to the glue inlet cavity; The upper mold assembly includes a panel, a first sprue plate, a second sprue plate and an upper mold mounting plate, and the glue inlet assembly includes a pouring gate profiling block, a pouring channel profiling block, a waste slag unloading block and a sprue cut-off block. The panel, the first sprue plate, the second sprue plate and the upper mold mounting plate are assembled from top to bottom by sliding a limit rod, and the glue inlet channel is through-set on the pouring gate profiling block, the pouring channel profiling block, the waste slag unloading block and the sprue cut-off block; wherein the first mold core chamber is set at the lower end of the upper mold mounting plate, the glue inlet chamber is set at the upper end of the upper mold mounting plate, and the glue inlet chamber is upwardly connected to the second sprue plate, the first sprue plate and the panel; the pouring gate profiling block and the pouring channel profiling block are both set on the panel In the glue inlet chamber on the upper part, the lower end of the pouring gate profiling block is butted with the upper end of the pouring channel profiling block, and the lower part of the pouring channel profiling block is slidably matched with the glue inlet chamber on the first nozzle plate; the waste residue discharge block is arranged in the glue inlet chamber on the first nozzle plate, the upper end of the waste residue discharge block is butted with the lower end of the pouring channel profiling block, and the lower part of the waste residue discharge block is slidably matched with the glue inlet chamber on the second nozzle plate, the nozzle cut-off block is arranged in the glue inlet chamber on the second nozzle plate, the upper end of the nozzle cut-off block is butted with the lower end of the waste residue discharge block, the lower part of the nozzle cut-off block is slidably matched with the glue inlet chamber on the upper mold mounting plate, and the lower end of the nozzle cut-off block is butted with the upper end of the upper mold core; The lower mold assembly includes a bottom plate, a supporting square iron and a lower mold mounting plate, the supporting square iron is fixedly mounted on the bottom plate, the sliding limit rod is arranged on the supporting square iron, and the lower mold mounting plate is limited on the supporting square iron by the sliding limit rod; the lower mold mounting plate is provided with a second mold core chamber for mounting the lower mold core and a telescopic through hole for connecting the push rod assembly; the push rod assembly includes an ejector fixing plate, an ejector rod, a push block and a driving mechanism, the driving mechanism is fixedly mounted on the lower mold mounting plate, the ejector fixing plate is connected to the driving mechanism in a power connection, the ejector rod is mounted on the ejector fixing plate, and the ejector rod is slidably connected to the telescopic through hole, and the push block is arranged at the upper end of the ejector rod and corresponds to the lower end of the cavity body; The production process of the injection molding product with USB port and no draft angle is as follows: Step 1: Install the mold, connect the blowing device to the blowing pipe of the mold, and connect the injection molding machine to the glue inlet component of the mold; Step 2: Prepare the injection molding material, put the injection molding material into the injection molding mixer for high-temperature stirring to make liquid injection molding material; Step 3: Injecting the injection molding material, injecting the liquid injection molding material prepared in step 2 into the mold cavity through the injection molding machine along the glue inlet component, and cooling and molding after the injection is completed; Step 4: Open the mold in sequence. The mold opening is carried out in the following order: 1) Open the second sprue plate, which drives the sprue cut-off block upwards to break the sprue at the sprue profiling groove. After the sprue is broken, gas is blown into the air pipe to prevent the mold from sticking between the formed upper cover and the upper mold core. 2) Open the first sprue plate, the waste slag discharge block rises, and the waste slag is extracted from the glue inlet channel of the sprue cut-off block; 3) Drive the blowing device, which blows air along the blowing pipe, so that the gas enters the glue feeding chamber along the blowing pipe to quickly cool the upper end of the injection molded workpiece; 4) Open the panel, the pouring channel profiling block rises and separates from the waste slag in the pouring channel, and the waste slag is discharged downward along the glue inlet channel of the waste slag discharge block, completing the automatic waste slag discharge operation; 5) Open the push plate, which drives the upper mold mounting plate upward, pushes the upper mold mounting plate upward, and at the same time pushes the lower end of the injection molded workpiece through the third mold core chamber to push the injection molded workpiece upward to complete the retraction operation; 6) Open the upper mold mounting plate, and separate the upper mold mounting plate from the injection molded workpiece; 7) The driving mechanism drives the ejector fixing plate upward, thereby driving the ejector rod upward, causing the push block to rise and eject the injection molded workpiece.

2. The mold for an injection molded product with a USB port and no draft angle according to claim 1, characterized in that: Both the upper die assembly and the lower die assembly are provided with sliding limit holes, and sliding limit rods are provided in the sliding limit holes. The upper die assembly and the lower die assembly cooperate with each other through the sliding limit rods.

3. The mold for an injection molded product with a USB port and no draft angle according to claim 1, characterized in that: The lower mold assembly also includes a push plate, which is limited between the lower mold mounting plate and the upper mold mounting plate by a sliding limit rod. The push plate is provided with a third mold core cavity that slides with the lower mold core, and the upper end of the third mold core cavity corresponds to the lower end of the cavity body.

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