Plastic mold for double-color forming and injection molding method thereof

Abstract

The invention relates to the technical field of injection molds, in particular to a plastic mold for double-color molding and an injection molding method thereof.The plastic mold comprises a plate B and a plate A. The plate B and the plate A are oppositely arranged, the plate B can move, a first rear mold core and a second rear mold core are arranged in the plate B, and a first front mold core and a second front mold core are arranged in the plate A; a first sliding block, a second sliding block and a third sliding block which are matched with the first rear mold core and the first front mold core are arranged in the first rear mold core and the first front mold core, and the first sliding block, the second sliding block and the third sliding block can move; a first mold cavity closed area of a first product can be formed among the first rear mold core, the first front mold core, the first sliding block, the second sliding block and the third sliding block, a rear mold core whole M which can be connected with the first rear mold core and can form an integral structure is arranged in the plate B, and a connecting rod which can be connected with the rear mold core whole M and can drive the rear mold core whole M to rotate is arranged in the plate B; and a connecting rod driving structure capable of driving the connecting rod to rotate is arranged in the plate B.

Description

Technical Field

[0001] The invention relates to the technical field of injection molds, in particular to a plastic mold for double-color molding and an injection molding method thereof. Background Art

[0002] This product is a car high-mounted brake light cover. The high-mounted brake light is usually located in the center of the rear of the vehicle. It is used in conjunction with other lighting equipment such as brake lights, width lights and reverse lights to provide drivers with more comprehensive driving safety protection. At night or in bad weather conditions, the brightness and high visibility of the high-mounted brake light can help other vehicles more easily detect changes in the vehicle in front, thereby reducing the occurrence of accidents.

[0003] After the high-mounted brake light is installed on the car, it needs to be sealed. If the sealing effect is not good, it is easy to cause the LED circuit inside to short-circuit, causing driving risks. The quality of the sealing effect depends on the product quality of the cover.

[0004] The size of the high-mounted brake light cover is 210*200*44mm (Note: 44 is the height in the direction of mold demoulding), the plastic material is ABS+TPE, the product is a two-color mold structure, two-color injection molding is used, and the soft glue of the product mainly plays a sealing role. The front and rear mold cores are used as inserts, the mold is one out of two (1+1), the needle valve hot runner system is used, the injection molding machine is HT530 tons, and the Green column size of the injection molding machine is: 1170*700*(400-910)mm (400-910 is the mold thickness of the injection molding machine).

[0005] If the injection molding machine is used to drive the rear half of the mold to rotate 180° for two-color molding, the product requirements cannot be met; if the product structure is changed, the above structural molding scheme can be used, but the product function will be deteriorated. Therefore, a plastic mold for two-color molding and its injection molding method are proposed. Summary of the invention

[0006] 1. Technical issues to be resolved

[0007] In view of the deficiencies of the prior art, the present invention provides a plastic mold for two-color molding and an injection molding method thereof, which solves the problems raised in the above background technology.

[0008] (II) Technical solution

[0009] To achieve the above objectives, the present invention is implemented through the following technical solutions: a plastic mold for two-color molding, comprising a B plate and an A plate, wherein the B plate and the A plate are arranged relative to each other and the B plate can move, wherein the B plate is provided with a first rear mold core and a second rear mold core, wherein the A plate is provided with a first front mold core and a second front mold core, wherein the first rear mold core and the first front mold core are provided with a first slider, a second slider and a third slider which cooperate with the first rear mold core and the first front mold core, wherein the first slider, the second slider and the third slider can all move, wherein the first rear mold core, the first front mold core, the first slider, the second slider and the third slider can form a first mold of a product. A mold cavity closed area, the B plate is provided with a rear mold core as a whole M that can be connected to the first rear mold core and can form an integral structure, the B plate is provided with a connecting rod that can be connected to the rear mold core as a whole M and can drive the rear mold core as a whole M to rotate, the B plate is provided with a connecting rod driving structure that can drive the connecting rod to rotate, the rear mold core as a whole M and the connecting rod can move synchronously, the second rear mold core in the B plate is in contact with the product one on the first rear mold core and can cooperate with the second front mold core in the A plate to form a second mold cavity closed area for product two, and the B plate is provided with an ejection structure that can eject products one and two in the second mold cavity closed area.

[0010] Furthermore, the A plate is provided with a first inclined guide column connected to the A plate and capable of driving the first slider to move, the B plate is provided with a second inclined guide column connected to the B plate and capable of driving the second slider to move, and the first front mold core is provided with a third inclined guide column connected to the first front mold core and capable of driving the third slider to move.

[0011] Furthermore, the A plate is provided with a first shovel connected to the A plate and capable of positioning and locking the first inclined guide column, the first front mold is provided with a second shovel connected to the first front mold and capable of positioning and locking the third inclined guide column, the outer side of the B plate is provided with a square iron connected to the B plate, the bottom end of the second inclined guide column is in contact with the square iron, and wear-resistant plates are provided between the first shovel and the first slider and between the second shovel and the second slider.

[0012] Furthermore, the rear mold core as a whole M includes a first ejector plate, a second ejector plate, a third ejector plate, a fourth ejector plate, an ejector A, a Tosi guide column and an ejector plate fixing block that can be assembled into the first rear mold core, the first ejector plate and the second ejector plate are sequentially installed at one side position between the B plate and the first rear mold core, the third ejector plate and the fourth ejector plate are sequentially installed at the other side position between the B plate and the first rear mold core, the second ejector plate and the fourth ejector plate are each provided with an ejector plate fixing block, the second ejector plate and the fourth ejector plate are both installed in the first rear mold core through the ejector plate fixing block, the Tosi guide column is respectively installed on the surface of the first ejector plate and the surface of the third ejector plate, the surface of the first ejector plate and the surface of the third ejector plate are each provided with an ejector block, and the surface of the first ejector plate and the surface of the third ejector plate are each provided with an ejector A.

[0013] Furthermore, the surfaces of the first ejector plate and the third ejector plate are both provided with springs which are hollowly sleeved with Toshi guide posts, the Toshi guide posts are symmetrically arranged at the two end positions of the surface of the first ejector plate, the Toshi guide posts are symmetrically arranged at the two end positions of the surface of the third ejector plate, a plurality of ejectors A are arranged at the middle position of the surface of the first ejector plate and the middle position of the surface of the third ejector plate, one of the ejector blocks is arranged at the outer position of the first ejector plate, and the other ejector block is arranged at the outer position of the third ejector plate.

[0014] Furthermore, a top plate capable of being displaced up and down and adjusted is provided at the bottom of the B plate, the connecting rod is installed in the top plate, the connecting rod driving structure includes a gear installed in the connecting rod, a cylinder fixing block connected to the B plate is provided in the B plate, a cylinder connected to the cylinder fixing block is provided in the cylinder fixing block, and an output end of the cylinder is connected to a rack capable of driving the gear to rotate.

[0015] Furthermore, a guide groove is circumferentially provided in the connecting rod, a guide strip matched with the guide groove is provided in the gear, a rotatable connecting block is provided in the top plate, the bottom end of the connecting rod is installed in the connecting block, the top end of the connecting rod is connected to the first rear mold core by a bolt, a wear-resistant ring matched with the gear is provided in the B plate, a rack connecting block capable of connecting to the rack is provided at the output end of the oil cylinder, a guide block capable of guiding the movement of the rack is provided in the B plate; a guide strip capable of guiding the synchronous movement of the rear mold core as a whole M and the connecting rod is provided in the B plate, and the guide strip extends upward to the A plate; a lower code template is provided below the top plate, a support column capable of being connected to the B plate is provided on the lower code template, and the support column can be used to guide the up and down displacement of the top plate, and a top plate driving oil cylinder capable of driving the top plate to move up and down is provided on the outside of the B plate.

[0016] Furthermore, the ejection structure includes a swing arm A, one end of which is equipped with a fixed block A, and the swing arm A is installed in the B plate through the fixed block A, and the other end of the swing arm A is equipped with a ejector block A, and the second ejector plate and the fourth ejector plate are both provided with an ejector block adjustment plate, and the ejector block A can conflict with the ejector block adjustment plate, and the lower code template is provided with an ejector rod A which is set in an empty sleeve with the ejector plate, and the top end of the ejector rod A extends upward into the B plate and the top end of the ejector rod A is equipped with a movable block A connected to the swing arm A.

[0017] Further, the B plate is provided with a fifth ejector plate, the fifth ejector plate is provided with an ejector B, the top of the ejector B extends into the second rear mold core, and the A plate is provided with

[0018] An upper code template connected to the A plate, the upper code template is provided with a first hot runner that can be connected to the first mold cavity closed area, the upper code template is provided with a second hot runner that can be connected to the second mold cavity closed area, the top of the ejector B can conflict with the output end of the second hot runner, the ejection structure also includes a swing arm B, one end of the swing arm B is installed with a fixed block B, the swing arm B is installed in the B plate through the fixed block B, the other end of the swing arm B is installed with an ejector block B, the ejector block B conflicts with the fifth ejector plate, the lower code template and the ejector plate are provided with an ejector rod B in an empty sleeve, the top of the ejector rod B is provided with a movable block B connected to the swing arm B, and the fifth ejector plate is provided with a reset spring that is connected to the fifth ejector plate and can be reset.

[0019] A method for injection molding a plastic mold for two-color molding, the method comprising:

[0020] Step 1: Mold front mold assembly:

[0021] a. The front mold and other structures need to be installed into the A plate and fixed with screws;

[0022] b. Install the third oblique guide column into the second shovel and fix it with screws. Install the second shovel and the third oblique guide column into the first front mold and fix them with screws. Then install them together into the A plate and fix them with screws.

[0023] c. Install the first oblique guide column into the first shovel, and install the first oblique guide column and the first shovel into the A plate together and fix them with screws;

[0024] d. Install the second inclined guide column into plate A and fix it with screws;

[0025] e. Install the first hot runner and the second hot runner into plate A, and fix the hot runner heating wires with a wire pressing plate;

[0026] f. Place the upper coding template on the A board and fix it with screws;

[0027] g. Install the locating ring into the upper code template and press the first hot runner and the second hot runner, and then fix it with screws;

[0028] h. Finally, connect and fix all the external parts of the mold, mold precision positioning, hot runner socket box, water joints, etc., so that the front mold part is assembled;

[0029] Step 2: Mold back mold assembly process:

[0030] a. Install the Tosi guide column, spring, first ejector plate and third ejector plate into the first rear mold core, then install ejector A into the first ejector plate and the third ejector plate, install the second ejector plate and the fourth ejector plate to the back of the first ejector plate and the third ejector plate, and then fix them with hexagon socket screws, and finally install the ejector plate fixing block into the back of the first rear mold core, and finally fix them with hexagon socket screws, so that they form a rear mold core as a whole M; then install the connecting rod into the rear mold core as a whole M and fix it with hexagon socket screws;

[0031] b. Install the gear, rack and guide block into plate B and fix them with screws;

[0032] c. Install the oil cylinder behind the oil cylinder fixing block and fix it with screws; install the rack connecting block to the output end of the oil cylinder, then connect them to the rack and fix them inside the B plate;

[0033] d. Install the guide strip into the front of plate B and fix it with screws. Install the second rear mold core into the mold frame of plate B and fix it with screws. Install the return spring and the fifth ejector plate into the back of plate B, then install ejector B and fix the pressure plate into the fifth ejector plate. Finally, install the ejector plate fixing plate into plate B and fix it with hexagon socket screws.

[0034] e. Fix the fixed block A, movable block A and top block A on the swing arm A with pins, and then install the whole into the B plate. Fix the top block A in the B plate with screws, and finally fix the top stick A on the fixed block A through threads; the other one is installed in the same way.

[0035] f. Fix the connection block to the top plate with screws and fix it with hexagon socket screws after assembly;

[0036] g. Place the top plate on the back of plate B and align them, then install the connecting rod and the rear mold core as a whole M from the front of plate B, and fix the connecting rod in the connecting block with the hexagon socket screws;

[0037] h. Align the square iron, support column and lower code template and fix them into a whole with screws and pins. Install them behind the B plate and fix them with pins and screws.

[0038] i. Fix the gasket and screws on the lower code template, then fix the ejector plate drive cylinder on the ejector plate with the hexagon socket screws, and finally fix the cylinder piston on the lower code template with the hexagon socket screws through the gasket;

[0039] j. Turn the mold over and fix the first slider, the second slider, the third slider, the wear-resistant plate and the pressure strip on the B plate with hexagon socket screws;

[0040] k. Finally, connect and fix all the external parts of the mold, mold precision positioning, water joints and oil pipes. At this time, you need to check whether the slider is in the mold opening state and whether there is a problem with the position of the oil cylinder. In this way, the rear mold part is assembled.

[0041] Step 3: Mold injection process:

[0042] 1). The movable side B plate part of the mold and the fixed side A plate part are closed;

[0043] 2). The plastic on the 1ST side is injected into the closed area of ​​the first mold cavity through the first hot runner, and the plastic injection on the 2ND side is stopped;

[0044] 3).1ST side mold pressure maintenance;

[0045] 4).1ST side mold cooling;

[0046] 5). Open the mold by the movable side B plate part and the fixed side A plate part of the mold;

[0047] 6). Then the top plate drives the oil cylinder to drive the first rear mold core to move forward;

[0048] 7). The cylinder moves backwards, driving the first rear mold core to rotate 180° counterclockwise;

[0049] 8). Then the top plate drives the oil cylinder to drive the first rear mold core to move backward;

[0050] 9). The movable side B plate part of the mold and the fixed side A plate part are closed;

[0051] 10). The 1ST side plastic injects the molten liquid into the first mold cavity closed area through the first hot runner; the 2ND side plastic injects the molten liquid into the second mold cavity closed area through the second hot runner;

[0052] 11). Then keep the pressure on the 1ST and 2ND molds;

[0053] 12). Wait for the molds in 1ST and 2ND to cool down;

[0054] 13). Open the mold of the movable side B plate part and the fixed side A plate part;

[0055] 14). The product on the 2ND side is ejected through the ejection structure;

[0056] 15). Finally, the ejector plate on the 2ND side is reset;

[0057] 16). The top plate drives the oil cylinder to drive the first rear mold core to move forward;

[0058] 17). The cylinder moves forward and drives the first rear mold core to rotate 180° clockwise.

[0059] 18). Then the top plate drives the oil cylinder to drive the first rear mold core to move backward;

[0060] 19). The movable side B plate part of the mold and the fixed side A plate part are closed;

[0061] 20). Then repeat the next step, starting from step 10.

[0062] The working principle of the injection mold:

[0063] The mold is a two-color mold for two moldings (the first molding is hard ABS plastic material, and the second molding is soft TPE plastic material). The structure and shape of the rear mold of the first molding and the rear mold of the second molding are completely different. The structure and shape of the front mold of the first molding and the front mold of the second molding are also different. This is the design feature of this mold. Such a structure is different from the ordinary two-color mold structure. The first shovel, the second shovel, the first oblique guide column and the second oblique guide column are fixed on the front mold side of the first molding. The first slider, the second slider and the third slider are fixed on the first molding side, and there is no such structure on the second molding side. (The side used for the first molding of hard ABS plastic material is divided into 1ST side plastic injection molding. The side used for the second molding of soft TPE plastic material is divided into 2ND plastic injection molding.)

[0064] Before the mold is closed, the three sliders in the first rear mold of the first molding are in the backward state, the ejector plate driving cylinder is in the original position, and there is no structure on the second molding side, all ejector plates are in the original state of the mold. When the mold is closed, the first inclined guide column on the first molding side drives the first slider to move forward, and the second inclined guide column on the other side drives the second slider to move forward. When they are closed to a certain position, the third inclined guide column will drive the third slider to move forward until the front and rear molds of the mold are all in contact. The second molding side has a simple structure without any slider structure.

[0065] On the first molding side, the plastic enters the first mold cavity closed area through the first hot runner system (the first mold cavity closed area consists of the first rear mold core, the first front mold core, the first slider, the second slider and the third slider), the mold is pressure-maintained, and the product is cooled; at the same time, on the second molding side, since there is no product 1 in the mold, the plastic injection is suspended on the second molding side;

[0066] When the mold is opened, the third inclined guide post on the first molding side will drive the third slider to move backwards. Under the action of the straight surface in the second inclined guide post, the second slider will not move backwards. When the mold opening stroke is equal to the straight surface length of the inclined guide post, the third inclined guide post will be separated from the third slider. At this time, the second inclined guide post will drive the second and third sliders to move backwards together until the second slider hits the limit screw at the back. On the other side, the first inclined guide post drives the first slider to move backwards until it hits the limit screw at the back. There is no product on the second molding side, and the front and rear mold cores of the mold are separated. Since there is no product in the 2ND mold cavity, the mold will not perform ejection.

[0067] After the mold is opened, the top drive cylinder drives the top plate to move forward, and at the same time, the connecting rod and the rear mold core M fixed on the top plate move forward along the guide strip until the second ejector plate stops moving after the limit block contacts the B plate. At the same time, the height of the rear mold core M must exceed the height of the guide strip. At this time, the cylinder drives the rack to move backward, and at the same time, the rack drives the gear to rotate 180° counterclockwise around the center of the mold. At this time, the rear mold core M and product one rotate 180° together. Then the top plate drive cylinder drives the top plate and the rear mold core M to move, so that product one moves backward. In order to ensure the accuracy of the mold, the rear mold core M and product one fixed on it need to move backward along the guide strip until the top plate contacts the lower code template, and the rear mold core M is completely in contact with the B plate, and product one contacts the second rear mold core. At this time, the mold rotation action is completed, and the mold is closed according to the above closing action;

[0068] On the first molding side, the plastic enters the first mold cavity closed area through the first hot runner system, the mold is pressurized, and the product is cooled; on the second molding side, the plastic enters the second mold cavity closed area through the second hot runner system (the second mold cavity closed area at this time consists of the second front mold core, the first rear mold core, the second rear mold core and product 1), then the mold is pressurized and the product is cooled.

[0069] When the mold is opened, the third inclined guide pin on the first molding side will drive the third slider to move backward. Under the action of the straight surface in the second inclined guide pin, the second slider will not move backward. When the mold opening stroke is equal to the straight surface length of the inclined guide pin, the third inclined guide pin will be separated from the third slider. At this time, the second inclined guide pin will drive the second and third sliders to move backward together until the second slider hits the limit screw at the back. The first inclined guide pin on the other side drives the first slider to move backward until it hits the limit screw at the back. On the second injection side, product 1 and product 2 remain on the two rear mold cores at the same time. The ejector rod of the injection molding machine contacts the two on the mold and drives them forward at the same time. Ejector rod A drives ejector block A forward through the lever principle. Ejector block A drives the first ejector plate, the second ejector plate and ejector A through the ejector adjustment plate to separate product 1 and product 2 from the mold core. Another ejector rod B drives ejector block B forward through the lever principle. Ejector block B drives the fifth ejector plate and ejector B to separate the runner from the mold core. Finally, product 1, product 2 and the runner are taken out together by the manipulator.

[0070] After the product is taken out, the ejector rod of the injection molding machine separates from the two ejector rods in the mold, and the ejector block A, the first ejector plate, the second ejector plate and the ejector pin A are reset under the action of the spring. The ejector block B, the ejector pin B and the fifth ejector pin plate of another set of ejection system are reset under the action of the reset spring.

[0071] At this time, the top plate drives the oil cylinder to drive the top plate to move forward, and at the same time, the connecting rod and the rear mold core M fixed on the top plate move forward along the guide strip until the second ejector plate stops moving after the limit block contacts the B plate; then the oil cylinder drives the rack to move forward, and the rack drives the gear to rotate 180° clockwise around the center of the mold. At this time, the first rear mold core rotates 180° clockwise, and the hollow area of ​​the first mold core returns to the position of the first injection molding, and the side with product 1 has been loaded into the position on the side of the second molding. Then the top plate drives the oil cylinder to drive the top plate 6, the rear mold core M and product 1 to move backward. In order to ensure the accuracy of the mold, the rear mold core M and the product 1 fixed on it need to move backward along the guide strip until the top plate contacts the lower code template 7, and the rear mold core M is completely in contact with the B plate, and the product 1 contacts the second rear mold core. At this time, the mold rotation action is completed. Then repeat the above mold action to proceed to the next molding cycle.

[0072] Compared with the prior art, the plastic mold and injection molding method for two-color molding can drive the rack to move through the oil cylinder to drive the gear to rotate, and then drive the connecting rod to rotate, so as to drive the rear mold core M to rotate 180°, thereby ensuring the accuracy of the production mold. The ejection structure of the injection mold uses the lever principle to eject the product, which can reduce the mold temperature and avoid oil cylinder failure, so that its effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0073] Figure 1 This is a schematic diagram of the product structure of the patent of this invention;

[0074] Figure 2 This is a schematic diagram of the fixed side three-dimensional structure of the patent of this invention;

[0075] Figure 3 It is a schematic diagram of the movable side three-dimensional structure of the patent of this invention;

[0076] Figure 4 This is a schematic diagram of the three-dimensional structure of the entire mold of the patent of this invention;

[0077] Figure 5 It is a cross-sectional view of the mold of the present invention in the mold closing state;

[0078] Figure 6 This is a schematic diagram of the mold structure after the product of the patent of this invention is ejected;

[0079] Figure 7 The position state of the partial structure of the patented invention;

[0080] Figure 8 It is a cross-sectional view of the first injection mold closing state of the patent of the present invention;

[0081] Fig. 9 It is a cross-sectional view of the second injection mold closing state of the patent of the present invention;

[0082] Fig.10 This is a schematic diagram of the positions of the parts of the first rear mold core and the oil cylinder of the patented invention in the original state;

[0083] Fig.11 It is a schematic diagram of the positions of the parts of the first rear mold core and the oil cylinder of the patented invention after ejection;

[0084] Fig.12 It is an exploded view of the entire rear mold core M of the patent of the present invention;

[0085] Fig.13 It is a schematic diagram of the lever structure of the ejection system of the present invention;

[0086] Fig.14 Patent for this invention Fig.13 The other side structural diagram in FIG.

[0087] Fig.15 It is the front and rear position state of the oil cylinder driving the rack gear of the patent of the present invention;

[0088] Fig.16 This is an exploded view of the oil cylinder driving the gear rack of the patented invention.

[0089] In the figure: 3, upper code template; 4, A plate; 5, B plate; 6, ejector plate; 7, lower code template; 10, first hot runner; 11, second hot runner; 12, first front mold core; 13, second front mold core; 14, first rear mold core; 15, first ejector plate; 16, second ejector plate; 17, third ejector plate; 18, fourth ejector plate; 20, guide strip; 22, ejector plate driving cylinder; 24, support column; 25, fixed block A; 26, swing arm A; 27, ejector block A; 28, movable block A; 29, ejector rod A; 30, ejector pin A; 31, ejector block adjustment plate; 32, Toss guide column; 33, spring; 35, connecting rod; 37, gear; 38, rack; 40, wear-resistant ring; 41, connecting block; 44, square iron; 45, second slider; 46, second inclined Guide pillar; 47, wear-resistant plate; 48, first slider; 49, first shovel; 50, first oblique guide pillar; 52, guide block; 54, rack connecting block; 55, cylinder fixing block; 56, cylinder; 58, ejector plate fixing block; 59, ejector block; 66, third slider; 67, third oblique guide pillar; 69, second rear mold core; 70, second shovel; 71, fifth ejector plate; 72, ejector block B; 73, swing arm B; 74, fixed block B; 75, movable block B; 76, ejector rod B; 77, ejector B; 78, reset spring; 79, first mold cavity closed area; 80, product one; 81, rear mold core overall M; 82, connecting rod driving structure; 83, product two; 84, ejector structure; 85, second mold cavity closed area; 92, guide groove; 93, guide strip. DETAILED DESCRIPTION

[0090] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0091] See also Figures 1 to 16The present invention provides a technical solution: a plastic mold for double-color molding, comprising a B plate 5 and an A plate 4, the B plate 5 and the A plate 4 are arranged relatively to each other and the B plate 5 can move, characterized in that: the B plate 5 is provided with a first rear mold core 14 and a second rear mold core 69, the A plate 4 is provided with a first front mold core 12 and a second front mold core 13, the first rear mold core 14 and the first front mold core 12 are provided with a first slider 48, a second slider 45 and a third slider 66 that match the first rear mold core 14 and the first front mold core 12, the A plate 4 is provided with a first inclined guide column 50 connected to the A plate 4 and capable of driving the first slider 48 to move, the B plate 5 is provided with a second inclined guide column 46 connected to the B plate 5 and capable of driving the second slider 45 to move, the first front mold core 1 2 is provided with a third inclined guide column 67 connected to the first front mold core 12 and capable of driving the third slider 66 to move, the A plate 4 is provided with a first shovel 49 connected to the A plate 4 and capable of positioning and locking the first inclined guide column 50, the first front mold core 12 is provided with a second shovel 70 connected to the first front mold core 12 and capable of positioning and locking the third inclined guide column 67, the outer side of the B plate 5 is provided with a square iron 44 connected to the B plate 5, the bottom end of the second inclined guide column 46 is in contact with the square iron 44, and wear-resistant plates 47 are provided between the first shovel 49 and the first slider 48, and between the second shovel 70 and the second slider 45. The first slider 48, the second slider 45 and the third slider 66 can all move, and the first rear mold core 14, the first front mold core 12, the first slider The first mold cavity closed area 79 of the product 80 can be formed between the block 48, the second slider 45 and the third slider 66, and the B plate 5 is provided with a rear mold core integral body M81 which can be connected to the first rear mold core 14 and can form an integral structure. The rear mold core integral body M81 includes a first ejector plate 15, a second ejector plate 16, a third ejector plate 17, a fourth ejector plate 18, an ejector A30, a Tosi guide column 32 and an ejector plate fixing block 58 which can be assembled into the first rear mold core 14. The first ejector plate 15 and the second ejector plate 16 are sequentially installed at one side position between the B plate 5 and the first rear mold core 14, the third ejector plate 17 and the fourth ejector plate 18 are sequentially installed at the other side position between the B plate 5 and the first rear mold core 14, and the second ejector plate 16 and the fourth ejector plate 18 are sequentially installed at the other side position between the B plate 5 and the first rear mold core 14. The plate 18 is provided with an ejector plate fixing block 58, the second ejector plate 16 and the fourth ejector plate 18 are both installed in the first rear mold core 14 through the ejector plate fixing block 58, the Tosi guide column 32 is respectively installed on the surface of the first ejector plate 15 and the surface of the third ejector plate 17, the surface of the first ejector plate 15 and the surface of the third ejector plate 17 are provided with an ejector block 59, the surface of the first ejector plate 15 and the surface of the third ejector plate 17 are provided with an ejector A30, the surface of the first ejector plate 15 and the surface of the third ejector plate 17 are provided with a spring 33 which is set in an empty sleeve with the Tosi guide column 32, the Tosi guide column 32 is symmetrically arranged at the two end positions of the surface of the first ejector plate 15, and the Tosi guide column 32 is symmetrically arranged at the two end positions of the surface of the third ejector plate 17,A plurality of ejectors A30 are provided at the middle position of the surface of the first ejector plate 15 and at the middle position of the surface of the third ejector plate 17, wherein one ejector block 59 is provided at the outer position of the first ejector plate 15, and another ejector block 59 is provided at the outer position of the third ejector plate 17, a connecting rod 35 which can be connected to the rear mold core as a whole M81 and can drive the rear mold core as a whole M81 to rotate is provided in the B plate 5, a connecting rod driving structure 82 which can drive the connecting rod 35 to rotate is provided in the B plate 5, an ejector plate 6 which can be displaced up and down and adjusted is provided at the bottom of the B plate 5, the connecting rod 35 is installed in the ejector plate 6, the connecting rod driving structure 82 includes a gear 37 installed in the connecting rod 35, and a cylinder fixing block 55 connected to the B plate 5 is provided in the B plate 5, and the cylinder fixing block 55 A cylinder 56 connected to the cylinder fixing block 55 is provided in the middle, and a rack 38 capable of driving the gear 37 to rotate is connected to the output end of the cylinder 56, a guide groove 92 is circumferentially arranged in the connecting rod 35, and a guide bar 93 adapted to the guide groove 92 is provided in the gear 37, a connecting block 41 capable of rotation is provided in the top plate 6, the bottom end of the connecting rod 35 is installed in the connecting block 41, and the top end of the connecting rod 35 is connected to the first rear mold core 14 by bolts, and a wear-resistant ring 40 matched with the gear 37 is provided in the B plate 5, and a rack connecting block 54 capable of connecting to the rack 38 is provided at the output end of the cylinder 56, and a guide block 52 capable of guiding the movement of the rack 38 is provided in the B plate 5; a guide block 52 capable of guiding the movement of the rack 38 is provided in the B plate 5; a guide block 52 capable of guiding the synchronous movement of the rear mold core M81 and the connecting rod 35 is provided in the B plate 5 A guide strip 20 is provided for guiding the movement of the top plate 6, and the guide strip 20 extends upward to the A plate 4; a lower code template 7 is provided below the top plate 6, and a support column 24 which can be connected to the B plate 5 is provided on the lower code template 7, and the support column 24 can be used to guide the up and down displacement of the top plate 6, and a top plate driving cylinder 22 which can be used to drive the top plate 6 to move up and down is provided on the outside of the B plate 5, and the rear mold core M81 and the connecting rod 35 can move synchronously, and the second rear mold core 69 in the B plate 5 contacts the product 1 80 on the first rear mold core 14 and can cooperate with the second front mold core 13 in the A plate 4 to form a second mold cavity closed area 85 for the product 2 83, and an ejection structure 84 which can eject the product 1 80 and the product 2 83 in the second mold cavity closed area 85 is provided in the B plate 5. The structure 84 includes a swing arm A26, one end of which is provided with a fixed block A25, and the swing arm A26 is installed in the B plate 5 through the fixed block A25, and the other end of the swing arm A26 is provided with a top block A27, and the second ejector plate 16 and the fourth ejector plate 18 are provided with an ejector block adjustment plate 31, and the ejector block A27 can conflict with the ejector block adjustment plate 31, and the lower code template 7 is provided with an ejector rod A29 which is set in an empty sleeve with the ejector plate 6, and the top end of the ejector rod A29 extends upward to the B plate 5 and the top end of the ejector rod A29 is provided with a movable block A28 connected to the swing arm A26, and the B plate 5 is provided with a fifth ejector plate 71, and the fifth ejector plate 71 is provided with an ejector B77, and the top end of the ejector B77 extends to the second rear mold core 69, and the A plate 4 is provided with an upper code template 3 connected to the A plate 4,The upper code template 3 is provided with a first hot runner 10 that can be connected to the first mold cavity closed area 79, and the upper code template 3 is provided with a second hot runner 11 that can be connected to the second mold cavity closed area 85. The top of the ejector B77 can conflict with the output end of the second hot runner 11. The ejection structure 84 also includes a swing arm B73, one end of which is installed with a fixed block B74, and the swing arm B73 is installed in the B plate 5 through the fixed block B74. The other end of the swing arm B73 is installed with an ejector block B72, and the ejector block B72 conflicts with the fifth ejector plate 71. The lower code template 7 and the ejector plate 6 are provided with an ejector rod B76 in an empty sleeve, and the top of the ejector rod B76 is provided with a movable block B75 connected to the swing arm B73. The fifth ejector plate 71 is provided with a reset spring 78 that is connected to the fifth ejector plate 71 and can be reset.

[0092] See also Figures 1 to 16 The present invention provides a technical solution: an injection molding method for a plastic mold for two-color molding, the method comprising:

[0093] Step 1: Mold front mold assembly:

[0094] a. The front mold and other structures need to be installed into the A plate 4 and fixed with screws;

[0095] b. Load the third oblique guide post 67 into the second shovel 70 and fix it with screws, load the second shovel 70 and the third oblique guide post 67 into the first front mold 12 and fix them with screws; then load them together into the A plate 4 and fix them by screws;

[0096] c. The first oblique guide column 50 is loaded into the first shovel machine 49, and the first oblique guide column 50 and the first shovel machine 49 are loaded into the A plate 4 together and fixed by screws;

[0097] d. Insert the second oblique guide post 46 into the A plate 4 and fix it with screws;

[0098] e. Install the first hot runner 10 and the second hot runner 11 into the A plate 4, and fix the hot runner heating wires with a wire pressing plate;

[0099] f. Place the upper code template 3 on the A plate 4 and fix it with screws;

[0100] g. Install the positioning ring into the upper code template 4 and press the first hot runner 10 and the second hot runner 11, and then fix it with screws;

[0101] h. Finally, connect and fix all the external parts of the mold, mold precision positioning, hot runner socket box, water joints, etc., so that the front mold part is assembled;

[0102] Step 2: Mold back mold assembly process:

[0103] a. Install the Tosi guide column 32, the spring 33, the first ejector plate 15 and the third ejector plate 17 into the first rear mold core 14, then install the ejector A30 into the first ejector plate 15 and the third ejector plate 17, install the second ejector plate 16 and the fourth ejector plate 18 to the back of the first ejector plate 15 and the third ejector plate 17, and then fix them with hexagon socket screws, and finally install the ejector plate fixing block 58 to the back of the first rear mold core 14, and finally fix them with hexagon socket screws, so that they form a rear mold core as a whole M81; then install the connecting rod 35 into the rear mold core as a whole M81 and fix it with hexagon socket screws;

[0104] b. Install the gear 37, rack 38 and guide block 52 into the B plate 5 and fix them with screws;

[0105] c. Install the oil cylinder 56 behind the oil cylinder fixing block 55 and fix it with screws; install the rack connecting block 54 to the output end of the oil cylinder 56, and then connect them to the rack 38 and fix them to the inside of the B plate 5;

[0106] d. Install the guide strip 20 into the front of the B plate 5 and fix it with screws, install the second rear mold core 69 into the mold frame of the B plate 5 and fix it with screws; install the return spring 78 and the fifth ejector plate 71 into the back of the B plate 5, then install the ejector B77 and fix the pressure plate into the fifth ejector plate 71, finally install the ejector plate fixing plate into the B plate 5, and then fix it with hexagon socket screws;

[0107] e. Fix the fixed block A25, movable block A28 and top block A27 on the swing arm A26 with pins, and then install the whole into the B plate 5. Fix the top block A27 inside the B plate 5 with screws, and finally fix the top rod A29 on the fixed block A25 through threads; the other one is installed in the same way.

[0108] f. Use screws to fix the connecting block 41 to the top plate 6, and fix it with hexagon socket screws after assembly;

[0109] g. Place the top plate 6 on the back of the B plate 5 and align them, then install the connecting rod 35 and the rear mold core M81 from the front of the B plate 5, and fix the connecting rod 35 in the connecting block 41 with the hexagon socket screw;

[0110] h. Make the square iron 44, support column 24 flush with the lower code template 7 and fix them into a whole with screws and pins, install them behind the B plate 5 and then fix them with pins and screws.

[0111] i. Fix the gasket and screws on the lower code template 7, then fix the top plate drive cylinder 22 on the ejector plate 6 with the hexagon socket screw, and finally fix the cylinder piston on the lower code template 7 with the hexagon socket screw through the gasket;

[0112] j. Turn the mold over and fix the first slider 48, the second slider 45, the third slider 66, the wear plate 47 and the pressure strip on the B plate 5 with hexagon socket screws;

[0113] k. Finally, connect and fix all the external parts of the mold, mold precision positioning, water joints and oil pipes. At this time, you need to check whether the slider is in the mold opening state and whether there is a problem with the position of the oil cylinder. In this way, the rear mold part is assembled.

[0114] Step 3: Mold injection process:

[0115] 1. The movable side B plate 5 of the mold and the fixed side A plate 4 are molded together;

[0116] 2. The plastic on the 1ST side is injected into the first cavity closed area 79 through the first hot runner 10, and the injection of plastic on the 2ND side is stopped;

[0117] 3.1ST side mold pressure maintenance;

[0118] 4.1ST side mold cooling;

[0119] 5. The mold movable side B plate 5 part and the fixed side A plate 4 part are opened;

[0120] 6. Then the top plate drives the oil cylinder 22 to drive the first rear mold core 14 to move forward;

[0121] 7. The oil cylinder 56 moves backwards, driving the first rear mold core 14 to rotate 180° counterclockwise;

[0122] 8. Then, the top plate drives the oil cylinder 22 to drive the first rear mold core 14 to move backward;

[0123] 9. The movable side B plate 5 part of the mold and the fixed side A plate 4 part of the mold are closed;

[0124] 10.1ST side plastic is injected into the first mold cavity closed area 79 through the first hot runner 10; 2ND side plastic is injected into the second mold cavity closed area 85 through the second hot runner 11;

[0125] 11. Then keep the pressure on the 1ST and 2ND molds;

[0126] 12. Wait for the molds in 1ST and 2ND to cool down;

[0127] 13. The movable side B plate 5 part and the fixed side A plate 4 part of the mold are opened;

[0128] 14. The product on the 2ND side is ejected through the ejection structure 84;

[0129] 15. Finally, the ejector plate on the 2ND side is reset;

[0130] 16. The top plate drives the oil cylinder 22 to drive the first rear mold core 14 to move forward;

[0131] 17. The oil cylinder 56 moves forward and drives the first rear mold core 14 to rotate 180° clockwise.

[0132] 18. Then the top plate drives the oil cylinder 22 to drive the first rear mold core 14 to move backward;

[0133] 19. The movable side B plate 5 part of the mold and the fixed side A plate 4 part of the mold are closed;

[0134] 20. Then repeat the next step, starting from step 10.

[0135] The electrical components mentioned in this article are all connected to an external main controller and 380V commercial power, and the main controller can be a conventional known device for control such as a computer.

[0136] In the description of this specification, the terms "connect", "install", "fix", "set", etc. are understood in a broad sense. For example, "connection" can be a fixed connection or an indirect connection through an intermediate component without affecting the relationship between components and the technical effect. It can also be an integral connection or a partial connection. As in this example, for ordinary technicians in this field, the specific meanings of the above terms in the present invention or invention can be understood according to the specific circumstances.

[0137] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A plastic mold for two-color molding, comprising a B plate (5) and an A plate (4), wherein the B plate (5) and the A plate (4) are arranged relative to each other and the B plate (5) can move, characterized in that: The B plate (5) is provided with a first rear mold core (14) and a second rear mold core (69), and the A plate (4) is provided with a first front mold core (12) and a second front mold core (13). The first rear mold core (14) and the first front mold core (12) are provided with a first slider (48), a second slider (45) and a third slider (66) which cooperate with the first rear mold core (14) and the first front mold core (12). The first slider (48), the second slider (45) and the third slider (66) are all movable. A first mold cavity closed area (79) of a product 1 (80) can be formed between the first rear mold core (14), the first front mold core (12), the first slider (48), the second slider (45) and the third slider (66). The B plate (5) is provided with a slider which can be connected to the first rear mold core (14) and can form a The rear mold core M (81) is an integral structure, the B plate (5) is provided with a connecting rod (35) that can be connected to the rear mold core M (81) and can drive the rear mold core M (81) to rotate, the B plate (5) is provided with a connecting rod driving structure (82) that can drive the connecting rod (35) to rotate, the rear mold core M (81) and the connecting rod (35) can move synchronously, the second rear mold core (69) in the B plate (5) contacts the product one (80) on the first rear mold core (14) and can cooperate with the second front mold core (13) in the A plate (4) to form a second mold cavity closed area (85) of the product two (83), and the B plate (5) is provided with an ejection structure (84) that can eject the product one (80) and the product two (83) in the second mold cavity closed area (85).

2. A plastic mold for two-color molding according to claim 1, characterized in that: The A plate (4) is provided with a first inclined guide column (50) connected to the A plate (4) and capable of driving the first slider (48) to move; the B plate (5) is provided with a second inclined guide column (46) connected to the B plate (5) and capable of driving the second slider (45) to move; and the first front mold core (12) is provided with a third inclined guide column (67) connected to the first front mold core (12) and capable of driving the third slider (66) to move.

3. A plastic mold for two-color molding according to claim 2, characterized in that: The A plate (4) is provided with a first shovel (49) connected to the A plate (4) and capable of positioning and locking the first inclined guide column (50); the first front mold core (12) is provided with a second shovel (70) connected to the first front mold core (12) and capable of positioning and locking the third inclined guide column (67); the outer side of the B plate (5) is provided with a square iron (44) connected to the B plate (5); the bottom end of the second inclined guide column (46) is in contact with the square iron (44); and wear-resistant plates (47) are provided between the first shovel (49) and the first slider (48) and between the second shovel (70) and the second slider (45).

4. A plastic mold for two-color molding according to claim 1, characterized in that: The rear mold core as a whole M (81) comprises a first ejector plate (15), a second ejector plate (16), a third ejector plate (17), a fourth ejector plate (18), an ejector A (30), a toe guide column (32) and an ejector plate fixing block (58) which can be assembled into the first rear mold core (14), wherein the first ejector plate (15) and the second ejector plate (16) are sequentially installed at one side position between the B plate (5) and the first rear mold core (14), and the third ejector plate (17) and the fourth ejector plate (18) are sequentially installed at the other side position between the B plate (5) and the first rear mold core (14). The second ejector plate (16) and the fourth ejector plate (18) are both provided with an ejector plate fixing block (58), the second ejector plate (16) and the fourth ejector plate (18) are both installed in the first rear mold core (14) through the ejector plate fixing block (58), the Tosi guide column (32) is respectively installed on the surface of the first ejector plate (15) and the surface of the third ejector plate (17), the surface of the first ejector plate (15) and the surface of the third ejector plate (17) are both provided with an ejector block (59), and the surface of the first ejector plate (15) and the surface of the third ejector plate (17) are both provided with an ejector A (30).

5. A plastic mold for two-color molding according to claim 4, characterized in that: The surfaces of the first ejector plate (15) and the third ejector plate (17) are both provided with springs (33) which are hollowly sleeved with the Toshi guide pillars (32); the Toshi guide pillars (32) are symmetrically arranged at the two end positions of the surface of the first ejector plate (15); the Toshi guide pillars (32) are symmetrically arranged at the two end positions of the surface of the third ejector plate (17); a plurality of ejectors A (30) are both arranged at the middle position of the surface of the first ejector plate (15) and the middle position of the surface of the third ejector plate (17); one of the ejector blocks (59) is arranged at the outer position of the first ejector plate (15), and the other ejector block (59) is arranged at the outer position of the third ejector plate (17).

6. A plastic mold for two-color molding according to claim 1, characterized in that: The bottom of the B plate (5) is provided with a top plate (6) that can be displaced up and down and adjusted, the connecting rod (35) is installed in the top plate (6), the connecting rod driving structure (82) includes a gear (37) installed in the connecting rod (35), the B plate (5) is provided with a cylinder fixing block (55) connected to the B plate (5), the cylinder fixing block (55) is provided with a cylinder (56) connected to the cylinder fixing block (55), and the output end of the cylinder (56) is connected to a rack (38) that can drive the gear (37) to rotate.

7. A plastic mold for two-color molding according to claim 6, characterized in that: A guide groove (92) is circumferentially arranged in the connecting rod (35); a guide strip (93) matched with the guide groove (92) is arranged in the gear (37); a rotatable connecting block (41) is arranged in the top plate (6); the bottom end of the connecting rod (35) is mounted in the connecting block (41); the top end of the connecting rod (35) is connected to the first rear mold core (14) by bolts; a wear-resistant ring (40) matched with the gear (37) is arranged in the B plate (5); a rack connecting block (54) that can be connected to the rack (38) is arranged at the output end of the oil cylinder (56); and a rotatable connecting block (41) is arranged in the B plate (5). A guide block (52) is provided for guiding the movement of the rack (38); a guide bar (20) is provided in the B plate (5) for guiding the synchronous movement of the rear mold core M (81) and the connecting rod (35), and the guide bar (20) extends upward to the A plate (4); a lower code template (7) is provided below the top plate (6), and a support column (24) is provided on the lower code template (7) that can be connected to the B plate (5), and the support column (24) can be used to guide the upward and downward displacement of the top plate (6); and a top plate driving cylinder (22) is provided outside the B plate (5) for driving the top plate (6) to move upward and downward.

8. A plastic mold for two-color molding according to claim 7, characterized in that: The ejection structure (84) comprises a swing arm A (26), one end of which is mounted with a fixed block A (25), the swing arm A (26) being mounted in the B plate (5) through the fixed block A (25), the other end of which is mounted with an ejection block A (27), the second ejector plate (16) and the fourth ejector plate (18) being both provided with an ejection block adjustment plate (31), the ejection block A (27) being able to abut against the ejection block adjustment plate (31), the lower code template (7) being provided with an ejection rod A (29) being hollowly sleeved with the ejection plate (6), the top end of which extends upward into the B plate (5) and the top end of which is mounted with a movable block A (28) connected to the swing arm A (26).

9. A plastic mold for two-color molding according to claim 8, characterized in that: The B plate (5) is provided with a fifth ejector plate (71), the fifth ejector plate (71) is provided with an ejector pin B (77), the top end of the ejector pin B (77) extends into the second rear mold core (69), the A plate (4) is provided with an upper code template (3) connected to the A plate (4), the upper code template (3) is provided with a first hot runner (10) that can be connected to the first mold cavity closed area (79), the upper code template (3) is provided with a second hot runner (11) that can be connected to the second mold cavity closed area (85), the top end of the ejector pin B (77) can collide with the output end of the second hot runner (11), and the ejection structure (84) The invention also comprises a swing arm B (73), one end of which is provided with a fixed block B (74), the swing arm B (73) being installed in the B plate (5) through the fixed block B (74), the other end of which is provided with a top block B (72), the top block B (72) being in contact with the fifth ejector plate (71), the lower code template (7) being provided with an ejector rod B (76) being hollowly sleeved with the ejector plate (6), the top of the ejector rod B (76) being provided with a movable block B (75) connected to the swing arm B (73), and the fifth ejector plate (71) being provided with a reset spring (78) connected to the fifth ejector plate (71) and capable of being reset.

10. The method for injection molding of a plastic mold for two-color molding according to claim 1, characterized in that: The method includes: Step 1: Mold front mold assembly: a. The front mold and other structures need to be installed into the A plate (4) and fixed with screws; b. The third oblique guide post (67) is loaded into the second shovel (70) and fixed with screws, and the second shovel (70) and the third oblique guide post (67) are loaded into the first front mold (12) and fixed with screws; and then they are loaded together into the A plate (4) and fixed by screws; c. The first oblique guide column (50) is loaded into the first shovel machine (49), and the first oblique guide column (50) and the first shovel machine (49) are loaded into the A plate (4) together and fixed by screws; d. Insert the second oblique guide post (46) into the A plate (4) and fix it with screws; e. Install the first hot runner (10) and the second hot runner (11) into the A plate (4), and fix the hot runner heating wire with a wire pressing plate; f. Place the upper coding template (3) on the A plate (4) and fix it with screws; g. Install the positioning ring into the upper code template 4 and press the first hot runner (10) and the second hot runner (11), and then fix it with screws; h. Finally, connect and fix all the external parts of the mold, mold precision positioning, hot runner socket box, water joints, etc., so that the front mold part is assembled; Step 2: Mold back mold assembly process: a. Install the Tosi guide column (32), the spring (33), the first ejector plate (15) and the third ejector plate (17) into the first rear mold core (14), then install the ejector A (30) into the first ejector plate (15) and the third ejector plate (17), install the second ejector plate (16) and the fourth ejector plate (18) to the back of the first ejector plate (15) and the third ejector plate (17), and then fix them with hexagon socket screws, and finally install the ejector plate fixing block (58) into the back of the first rear mold core (14), and finally fix them with hexagon socket screws, so that they form a rear mold core as a whole M (81); then install the connecting rod (35) into the rear mold core as a whole M (81) and fix it with hexagon socket screws; b. Install the gear (37), rack (38) and guide block (52) into plate B (5) and secure with screws; c. Install the oil cylinder (56) behind the oil cylinder fixing block (55) and fix it with screws; install the rack connecting block (54) into the output end position of the oil cylinder (56), and then connect them to the rack (38) and fix them to the inside of the B plate (5); d. Install the guide strip (20) into the front of the B plate (5) and fix it with screws. Install the second rear mold core (69) into the mold frame of the B plate (5) and fix it with screws. Install the return spring (78) and the fifth ejector plate (71) into the back of the B plate (5). Then install the ejector B (77) and fix the pressure plate into the fifth ejector plate (71). Finally, install the ejector plate fixing plate into the B plate (5) and fix it with hexagon socket screws. e. Fix the fixed block A (25), the movable block A (28) and the top block A (27) on the swing arm A (26) with pins, and then install the whole into the B plate (5). Fix the top block A27 inside the B plate (5) with screws, and finally fix the top rod A (29) on the fixed block A (25) through threads; the other one is installed in the same way. f. Fix the connection block (41) to the top plate (6) with screws and fix it with hexagon socket screws after assembly; g. Place the top plate (6) on the back of the B plate (5) and align them, then install the connecting rod (35) and the rear mold core M (81) from the front of the B plate (5), and fix the connecting rod (35) to the connecting block (41) with the hexagon socket screw; h. Make the square iron (44), support column (24) flush with the lower code template (7) and fix them into a whole with screws and pins, install them behind the B plate (5) and then fix them with pins and screws. i. Fix the gasket and screws on the lower code template (7), then fix the ejector plate drive cylinder (22) on the ejector plate (6) with a hexagon socket screw, and finally fix the cylinder piston on the lower code template (7) with a hexagon socket screw through the gasket; j. Turn the mold over and fix the first slider (48), the second slider (45), the third slider (66), the wear plate (47) and the pressure strip on the B plate (5) with hexagon socket screws; k. Finally, connect and fix all the external parts of the mold, mold precision positioning, water joints and oil pipes. At this time, you need to check whether the slider is in the mold opening state and whether there is a problem with the position of the oil cylinder. In this way, the rear mold part is assembled. Step 3: Mold injection process: 1). The movable side B plate (5) of the mold and the fixed side A plate (4) are closed; 2). The plastic on the 1ST side is injected into the first mold cavity closed area (79) through the first hot runner (10), and the injection of plastic on the 2ND side is suspended; 3).1ST side mold pressure maintenance; 4).1ST side mold cooling; 5). The movable side B plate (5) and the fixed side A plate (4) of the mold are opened; 6). Then the top plate driving cylinder (22) drives the first rear mold core (14) to move forward; 7). The oil cylinder (56) moves backwards, driving the first rear mold core (14) to rotate 180° counterclockwise; 8). Then, the top plate drives the oil cylinder (22) to drive the first rear mold core (14) to move backward; 9). The movable side B plate (5) of the mold and the fixed side A plate (4) of the mold are closed; 10). The 1ST side plastic is injected into the first mold cavity closed area (79) through the first hot runner (10); The 2ND side plastic is injected into the second mold cavity closed area (85) through the second hot runner (11); 11). Then keep the pressure on the 1ST and 2ND molds; 12). Wait for the molds in 1ST and 2ND to cool down; 13). The movable side B plate (5) and the fixed side A plate (4) of the mold are opened; 14). The product on the 2ND side is ejected through the ejection structure (84); 15). Finally, the ejector plate on the 2ND side is reset; 16). The top plate drives the oil cylinder (22) to drive the first rear mold core (14) to move forward; 17). The oil cylinder (56) moves forward, driving the first rear mold core (14) to rotate 180° clockwise. 18). Then the top plate drives the oil cylinder (22) to drive the first rear mold core (14) to move backward; 19). The movable side B plate (5) of the mold and the fixed side A plate (4) of the mold are closed; 20). Then repeat the next step, starting from step 10.

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