Two-color rotary mold and molding method

Abstract

The present application provides a two-color rotary mold and molding method, which are applied to the technical field of two-color rotary molds, wherein the two-color rotary mold includes a front mold and a rotatable rear mold, wherein the front mold is provided with a first front mold cavity and a second front mold cavity, wherein the first front mold cavity is provided with a plurality of first shovels, and the second front mold cavity is provided with a plurality of second shovels; the rear mold is provided with a plurality of insert sliders; the side end of the first shovel is a plane, the side end of the second shovel is provided with a guide bevel, and a connecting lock block is slidably provided on the insert slider; when the mold is opened, the guide bevel of the second shovel guides the connecting lock block, driving the insert slider to slide outward and open, at which time the first shovel does not drive the corresponding insert slider to move. The present application uses the guide bevel of the second shovel to guide the connecting lock block and the insert slider to move and open, thereby achieving the goal that the corresponding insert slider does not move after the first mold opening, and slides open after the second mold opening.

Description

Technical Field

[0001] The present application relates to the technical field of two-color rotary molds, and in particular to a two-color rotary mold and a molding method. Background Art

[0002] As a household cleaning tool, the floor brush has an air outlet at an angle, and an irregular sealing rubber ring is provided at the air outlet. Therefore, a two-color mold can be used for injection molding.

[0003] A two-color mold can combine two different resins and colors into a single, two-color product, replacing secondary processing with a single molding process. The corresponding two-color injection molding machine consists of two sets of plasticizing and injection units with identical structures and specifications.

[0004] Two-shot rotary molds require the rear mold to rotate 180 degrees about the mold center. Therefore, the rear mold must be aligned with the front mold before and after rotation. During rear mold rotation, the air duct connector, after the primary molding process, must remain positioned on the rear mold core and cannot be demolded until after the secondary injection molding process. Therefore, a linked demolding mechanism can be designed and applied to two-shot molds, allowing the finished product to be released from the rear mold core only after the secondary molding process. Summary of the Invention

[0005] (1) Technical issues to be resolved

[0006] In view of this, the present application provides a two-color rotary mold and molding method, which guides the connecting lock block of the insert slider to slide open through the guide groove of the second shovel machine, so that it is not demolded during the first injection molding, and is demolded and opened by the second shovel machine during the second injection molding.

[0007] (2) Technical solution

[0008] The embodiments of this specification provide the following technical solutions:

[0009] The embodiment of this specification provides a two-color rotational mold, specifically comprising:

[0010] The front mold is provided with a plurality of first front mold cavities for primary injection molding of the air duct connector, and a second front mold cavity symmetrically arranged with respect to the first front mold cavity, wherein the second front mold cavity is configured to secondary injection mold a sealing soft rubber ring on the air duct connector to form a finished workpiece; the first front mold cavity is provided with a plurality of first shovels, and the second front mold cavity is provided with a plurality of second shovels symmetrically arranged with respect to the first shovels;

[0011] The rear mold can rotate along the center of the mold. The rear mold is provided with multiple insert sliders corresponding to the first shovel and the second shovel. Each rear mold cavity can be clamped with the front mold cavity corresponding to the front mold before or after the rotation of the rear mold; the air duct joint is injection molded after the rear mold cavity is clamped with the first front mold cavity, and the sealing soft rubber ring is injection molded on the air duct joint after the rear mold cavity is clamped with the second front mold cavity.

[0012] Among them, the side end of the first shovel is a plane, the side end of the second shovel is provided with a guiding inclined groove, and the insert slider is slidably provided with a connecting locking block that can contact and cooperate with the guiding inclined groove; when the mold is opened, the guiding inclined groove guides the connecting locking block, driving the insert slider to slide and open outward. At this time, the first shovel is not provided with a guiding inclined groove, so it will not drive the connecting locking block when the front mold is opened. Therefore, after the air duct joint is initially molded on the rear mold cavity of the rear mold, the first shovel will not drive the corresponding air duct joint to be demolded when the front mold is opened upward (that is, the insert slider corresponding to the first shovel does not move, so the air duct joint after the initial molding can be transferred to the position below the second front mold cavity after the rear mold is rotated, waiting for the secondary injection molding of the sealing soft rubber ring).

[0013] In some embodiments, the first shovel and the second shovel are respectively provided with a shovel inclined surface, and the insert slider is provided with a mold closing bevel corresponding to the shovel inclined surface. The shovel inclined surfaces of the two shovels guide the corresponding mold closing bevels to close the mold during mold closing, thereby forming the rear mold cavity; the insert slider is provided with a locking block slide groove for installing the connecting locking block; a locking block spring and the connecting locking block are installed in the locking block slide groove, and one end of the connecting locking block is placed in the mold closing bevel.

[0014] In some embodiments, a first front mold slide block for forming an inclined air outlet of the air duct joint is slidingly provided on one side of the first front mold cavity, and a second front mold slide block symmetrical to the first front mold slide block is slidingly provided on one side of the second front mold cavity, and the second front mold slide block is configured to form the sealing soft rubber ring, and the front mold slide blocks are all obliquely set on the front mold; the first front mold slide block and the second front mold slide block are respectively obliquely slidably installed on the front mold; a guide seat for accommodating the first front mold slide block and the second front mold slide block is obliquely provided on the rear mold, and the upper end face of the guide seat is perpendicular to the sliding direction of the first front mold slide block and the second front mold slide block relative to the front mold; when the front mold and the rear mold start to close the mold, the front mold slide block on the front mold enters the guide seat until the mold is fully closed.

[0015] In some embodiments, a front mold slide rail is obliquely arranged on the front mold, and the first front mold sliding spring block and the second front mold sliding spring block are correspondingly provided with insert slide grooves that slide with the front mold slide rail. The first front mold sliding spring block and the second front mold sliding spring block are respectively installed with sliding springs between the front mold, and the axis of the sliding spring is parallel to the sliding direction of the front mold slide rail.

[0016] In some embodiments, the front mold is provided with a first front mold core installed at the first front mold cavity and a second front mold core installed at the second front mold cavity, and the first front mold sliding block and the second front mold core are correspondingly provided with a molding cavity for forming the sealing soft rubber ring, and the molding cavity is provided on the front mold.

[0017] In some embodiments, the bottom of the first front mold sliding spring block and the second front mold sliding spring block are respectively installed with sliding buckles, and the guide seat is provided with a limiting buckle for cooperating with the sliding buckle when the mold is closed. The limiting buckle is configured to prevent the first front mold sliding spring block from directly opening the mold upward and exiting to damage the air duct joint when the mold is opened; the limiting buckle and the sliding buckle can be used in conjunction with the sliding spring, and the sliding buckle of the front mold sliding spring block is correspondingly inserted into the limiting buckle when the mold is closed, forming interference in the mold opening direction, so that the front mold sliding spring block cannot move directly along the mold opening direction when the mold is opened, thereby avoiding damage to the injection molded product when the mold is opened.

[0018] In some embodiments, the rear mold is provided with rear mold cavities corresponding to the first front mold cavity and the second front mold cavity for mold closing, and the number of the rear mold cavities is the sum of the first front mold cavity and the second front mold cavity; the rear mold is installed with a rear mold core at the rear mold cavity, and the first front mold sliding spring block and the second front mold sliding spring block are installed with elastic pins with springs, and the elastic pins rest on the side ends of the rear mold core when the mold is closed, and the elastic pins are configured to provide a thrust for the first front mold sliding spring block and the second front mold sliding spring block when the mold is closed, thereby eliminating the sliding gap between the first front mold sliding spring block and the second front mold sliding spring block on the front mold slide rail, and assisting the first front mold sliding spring block and the second front mold sliding spring block to pop out, demold and exit.

[0019] In some embodiments, the rear mold is mounted on a rotating workbench; there are two first front mold cavities and two second front mold cavities respectively, and there are four rear mold cavities correspondingly; the front mold is provided with a first pouring gate corresponding to the first front mold cavity and a second pouring gate corresponding to the second front mold cavity.

[0020] The embodiments of this specification also provide a two-color rotary mold molding method, which is basically implemented by the two-color rotary mold described in any embodiment of this specification and specifically includes the following steps:

[0021] Step S01, one-time mold closing and injection molding: the first pouring gate of the front mold is opened to inject glue, the second pouring gate of the front mold is closed, and the air duct joint is injection-molded in the first front mold cavity;

[0022] Step S02, opening the mold once; the first front mold slide spring block and the second front mold slide spring block on the front mold are tilted outward to open and exit the mold cavity, and the first shovel and the second shovel of the front mold move upward. The side end surface of the first shovel is flat. When the front mold is opened upward, the first shovel does not drive the insert slider on one side of the rear mold to slide outward and open;

[0023] Step S03, rotating the rear mold; the rear mold is rotated 180 degrees on the rotary table to transfer the air duct joint formed by the initial injection molding to the second front mold cavity and the second front mold slide block of the front mold;

[0024] Step S04, secondary mold closing and injection molding; the first pouring gate and the second pouring gate of the front mold are opened respectively to inject glue, and a sealing soft rubber ring is secondary injection-molded on the air duct joint through the second pouring gate and the molding cavity of the second front mold cavity to form a finished workpiece;

[0025] Step S05, secondary mold opening; the second shovel of the front mold moves upward with the front mold, and the guide chute of the second shovel guides the connecting lock block of the insert slider to slide outward and open;

[0026] Step S06, ejecting the material; ejecting the finished workpiece by an ejector pin to complete the workpiece unloading;

[0027] Step S07, repeating steps S03 to S06.

[0028] In some embodiments, in step S04, the molding cavity is directly arranged on the first front mold sliding block and the second front mold core at the second front mold cavity; in step S02 and step S05, the sliding exit direction of the first front mold sliding block and the second front mold sliding block is along the inclined direction of the guide seat, and when the mold is opened, the sliding buckle rods at the bottom of the first front mold sliding block and the second front mold sliding block slide out along the inclined direction of the guide seat until they are disengaged from the limiting buckle rod on the guide seat; when the front mold and the rear mold are closed, the elastic pins of the first front mold sliding block and the second front mold sliding block correspondingly abut against the side end of the rear mold core on the rear mold, eliminating the gap between the first front mold sliding block and the second front mold sliding block on the front mold slide rail of the front mold.

[0029] (3) Beneficial effects

[0030] Compared with the prior art, the at least one technical solution adopted in the embodiments of this specification can achieve the following beneficial effects:

[0031] The present application achieves the goal of not moving after the first injection molding by providing a first shovel and a second shovel with slightly different structures, and then driving the insert slider to move after the second injection molding by the second shovel; the side end surface of the first shovel is flat, and the side end surface of the second shovel is provided with a guide bevel. When the mold is closed, the connecting lock block of the insert slider rests against the side end surfaces of the first and second shovels respectively. During the mold opening process, the first shovel will not drive the connecting lock block and the insert slider to move, and only the guide bevel of the second shovel can drive the connecting lock block and the insert slider to move outward and open;

[0032] The present application symmetrically arranges a first front mold slide spring block and a second front mold slide spring block on the front mold. The first front mold slide spring block is mainly used to close the mold with the rear mold cavity of the rear mold to form an air duct joint by injection molding. The second front mold slide spring block is closed with the second front mold core on the front mold to form a sealing soft rubber ring by injection molding.

[0033] The first front mold slide block and the second front mold slide block of the present application are tilted and symmetrically arranged, and are equipped with a slide spring-assisted pop-up design. When the mold is closed, the two front mold slide blocks enter the guide seat tilted by the rear mold accordingly. An undercut design is provided between the two front mold slide blocks and the guide seat. When the mold is opened, the slide buckle rods of the first front mold slide block and the second front mold slide block need to be separated from the limit buckle rod along the tilt direction of the guide seat to prevent the first front mold slide block and the second front mold slide block from moving directly along the mold opening direction and damaging the air duct joint;

[0034] The present application provides elastic pins at the first front mold slide block and the second front mold slide block respectively. After the mold is closed, the elastic pins abut against the side end face of the rear mold core of the corresponding rear mold. The spring reaction force of the elastic pins pushes the first front mold slide block and the second front mold slide block to abut against the front mold slide rail respectively, so as to eliminate the sliding gap and assist the first front mold slide block and the second front mold slide block to reset smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0036] Figure 1 It is a three-dimensional diagram after mold closing in this application;

[0037] Figure 2 is a three-dimensional image of the finished workpiece in this application;

[0038] Figure 3 This is an exploded view of the air duct joint and the sealing rubber ring in this application;

[0039] Figure 4 is a perspective view of the front mold in this application;

[0040] Figure 5 This application Figure 4 A magnified view of part I in FIG;

[0041] Figure 6 This application Figure 4 The enlarged view of Part II in FIG.

[0042] Figure 7 This is a three-dimensional diagram of the first front mold slide block in this application;

[0043] Figure 8 This is a three-dimensional diagram of the first front mold slide block and the first front mold core after the mold is closed;

[0044] Figure 9 This is a three-dimensional diagram of the second front mold slide block in this application;

[0045] Figure 10 is a perspective view of the second front mold core in this application;

[0046] Figure 11 This is a three-dimensional diagram of the second front mold slide block and the second front mold core after the mold is closed;

[0047] Figure 12 is a perspective view of the first shovel and the second shovel in this application;

[0048] Figure 13 It is a three-dimensional diagram of the connecting lock block in this application;

[0049] Figure 14 is a perspective view of the second front mold core portion of the front mold in the present application;

[0050] Figure 15 This is a cross-sectional diagram of the first front mold slide block after mold closing in the present application;

[0051] Figure 16 This is a cross-sectional schematic diagram of the first front mold slide block in the present application, which embodies the elastic pin;

[0052] Figure 17 This is a schematic diagram of the structure after the first shovel machine and the rear mold are molded together in this application;

[0053] Figure 18 is a perspective view of the rear mold in this application;

[0054] Figure 19is a schematic cross-sectional view of the rear mold in this application;

[0055] Figure 20 This application Figure 19 The enlarged view of Part III in FIG.

[0056] Figure 21 is a perspective view of the rear mold cavity portion in this application;

[0057] Figure 22 It is an exploded view of the insert slider and the connecting lock block in this application;

[0058] Figure 23 It is a cross-sectional schematic diagram of the insert slider in this application.

[0059] Among them: 1 is the front mold, 2 is the back mold, 3 is the finished workpiece, 4 is the rotary workbench, 101 is the first front mold cavity, 102 is the second front mold cavity, 103 is the first shovel, 104 is the second shovel, 105 is the guide chute, 106 is the first front mold slide block, 107 is the second front mold slide block, 108 is the shovel inclined surface, 109 is the front mold slide rail, 110 is the insert slide groove, 111 is the slide spring, 112 is the first front mold core, 113 is the second front mold core, 114 is the molding cavity, 115 is the sliding buckle rod, 116 is the elastic pin, 117 is the first pouring gate, 118 is the second pouring gate, 201 is the rear mold cavity, 202 is the locking block inclined surface, 203 is the insert slider, 204 is the connecting locking block, 205 is the guide seat, 206 is the mold closing inclined groove, 207 is the locking block slide, 208 is the locking block spring, 209 is the limiting buckle rod, 210 is the rear mold core, 211 is the fixing block, 301 is the air duct joint, and 302 is the sealing soft rubber ring. DETAILED DESCRIPTION

[0060] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0061] The following describes the embodiments of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the features in the following embodiments and embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of this application.

[0062] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on this application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement an apparatus and / or practice a method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this apparatus and / or practice this method.

[0063] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The illustrations only show components related to the present application and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0064] Additionally, in the following description, specific details are provided to provide a thorough understanding of the examples, however, one skilled in the art will appreciate that the examples can be practiced without these specific details.

[0065] Combine Figure 1 、 Figure 4 and Figure 18 As shown, the present application provides a two-color rotary mold, specifically comprising: a front mold 1 and a rear mold 2, the rear mold 2 can rotate along the center of the mold, and the front mold 1 can only perform mold opening and closing movements in the mold opening and closing directions; the front mold 1 is provided with a plurality of first front mold cavities 101 for one-time injection molding of an air duct joint 301, and a second front mold cavity 102 symmetrically arranged with the first front mold cavity 101, the second front mold cavity 102 is configured to secondary injection mold a sealing soft rubber ring 302 on the air duct joint 301 to form a finished workpiece 3, combined with Figure 2 and Figure 3As shown, the air outlet of the air duct joint 301 of the finished workpiece 3 is arranged obliquely upward and is arranged in an outward-flaring conical trumpet shape. Therefore, the present application uses the first front mold cavity 101 to form the inclined air outlet of the air duct joint 301, and uses the second front mold cavity 102 to form the sealing soft rubber ring 302 on the air duct joint 301. The structural principles of the first front mold cavity 101 and the second front mold cavity 102 are the same, and the difference is that the second front mold cavity 102 has an additional mold cavity structure for forming the sealing soft rubber ring 302; a plurality of first shovels 103 are provided at the first front mold cavity 101, and a plurality of second shovels 103 are provided at the second front mold cavity 102, which are symmetrically arranged with the first shovels 103. 4; the rear mold 2 is provided with a rear mold cavity 201 for respectively closing the mold with the first front mold cavity 101 and the second front mold cavity 102, and the number of the rear mold cavity 201 is the sum of the first front mold cavity 101 and the second front mold cavity 102; the rear mold cavity 201 is provided with a plurality of insert sliders 203 corresponding to the first shovel machine 103 and the second shovel machine 104, and each rear mold cavity 201 can be closed with the front mold cavity corresponding to the front mold 1 before or after the rotation of the rear mold 2; after the rear mold cavity 201 and the first front mold cavity 101 are closed, the air duct joint 301 is injection molded, and after the rear mold cavity 201 and the second front mold cavity 102 are closed, a sealing soft rubber ring 302 is injection molded on the air duct joint 301.

[0066] The two-shot rotary mold of this application has two stations: a primary injection molding station and a secondary injection molding station. The primary injection molding station is used to injection-mold the air duct connector 301, and the secondary injection molding station is used to secondary-inject the sealing soft rubber ring 302 at the inclined air outlet of the air duct connector 301. After the front mold 1 is closed and opened once, the air duct connector 301 at the primary injection molding station is transferred to the secondary injection molding station via the rotating worktable 4 at the bottom of the rear mold 2 for secondary closing and opening. During the secondary mold opening, the second shovel 104 drives the insert slider 203 on the rear mold 2 outward, facilitating the demolding of the finished workpiece 3. After the front mold 1 is opened, the air duct connector 301 is always located on the rear mold 2.

[0067] Among them, the side end of the first shovel 103 is a plane, and the side end of the second shovel 104 is provided with a guide inclined groove 105. The insert slider 203 is slidably provided with a connecting lock block 204 that can contact and cooperate with the guide inclined groove 105; when the mold is opened, the guide inclined groove 105 guides the connecting lock block 204 to drive the insert slider 203 to slide outward and open. Therefore, after the secondary injection molding of the sealing soft rubber ring 302, the second shovel 104 can be used to drive the several insert sliders 203 in the rear mold 2 to open and demould outward, which is convenient for the subsequent ejector to eject the finished product. Part 3; so that after the air duct connector 301 is injection molded once, when the front mold 1 is opened relative to the rear mold 2, several insert sliders 203 at the rear mold cavity 201 corresponding to the first front mold cavity 101 do not move and are still in contact with the air duct connector 301 after the one-time molding. At this time, the rear mold 2 can be rotated to transfer the air duct connector 301 after the one-time molding to a position directly below the second front mold cavity 102, and then the mold is closed for a second time to injection mold the sealing soft rubber ring 302 on the inclined air outlet of the air duct connector 301, thereby realizing the two-color injection molding principle of the rotating two-color mold.

[0068] like Figure 5 、 Figure 6 As shown, the front mold 1 is provided with a first front mold core 112 at the first front mold cavity 101 and a second front mold core 113 at the second front mold cavity 102; Figure 21 As shown, the rear mold 2 is provided with a rear mold core 210 at the rear mold cavity 201 .

[0069] It should be noted that the number of the first front mold cavity 101 and the second front mold cavity 102 is not limited. In some preferred embodiments, for example, Figure 4 and Figure 18 As shown, there are two first front mold cavities 101 and two second front mold cavities 102 respectively, and four rear mold cavities 201 are correspondingly provided.

[0070] In some embodiments, the first shovel 103 and the second shovel 104 are respectively provided with a shovel inclined surface 108, and the insert slider 203 is provided with a mold closing inclined groove 206 corresponding to the shovel inclined surface 108. The shovel inclined surface 108 is used to guide the mold closing inclined groove 206 of the insert slider 203 for mold closing, so that the insert slider 203 and the rear mold core 210 form a rear mold cavity 201; the insert slider 203 is provided with a locking block slide 207 for installing the connecting locking block 204; the locking block slide 207 is installed with a locking block spring 208 and the connecting locking block 204; Figure 23 As shown, one end of the connecting locking block 204 is placed in the mold clamping inclined groove 206.

[0071] In one example, Figure 12 and Figure 22As shown, the locking block spring 208 is installed at one end away from the mold clamping chute 206 and is limited by the fixed block 211 and installed in the locking block slot 207. The locking block spring 208 is used to push the connecting locking block 204 into the mold clamping chute 206; Figure 12 As shown, the ends of the first shovel 103 and the second shovel 104 are tapered. When the shovel is inserted into the mold closing bevel 206, the connecting locking block 204 can be guided to enter the side end surface of the shovel. Because the two side end surfaces of the first shovel 103 are flat, the corresponding connecting locking block 204 does not produce displacement in other directions during the mold opening or closing process of the first shovel 103; and the two side end surfaces of the second shovel 104 are provided with guide bevel grooves 105, and the insert slider 203 cooperates with the locking block inclined surface 202 of the connecting locking block 204. During the upward mold opening process of the second shovel 104, the corresponding insert slider 203 can be driven by the second shovel 104 to slide outward and open.

[0072] In some embodiments, as Figure 4 As shown, a first front mold slide block 106 for forming an inclined air outlet of the air duct joint 301 is slidably provided on one side of the first front mold cavity 101, and a second front mold slide block 107 symmetrical to the first front mold slide block 106 is slidably provided on one side of the second front mold cavity 102. The second front mold slide block 107 is configured to be used for forming a sealing soft rubber ring 302. The first front mold core 112 and the first front mold slide block 106 form the first front mold cavity 101, and the second front mold core 113 and the second front mold core 113 form the second front mold cavity 102. The ends of the first front mold slide block 106 and the second front mold slide block 107 are both provided with slide blocks corresponding to the inclined air outlet of the air duct joint 301. Conical inserts, the main difference between the two is that the partial structure of the conical insert is different (used for forming the sealing soft rubber ring 302); the first front mold slide block 106 and the second front mold slide block 107 are respectively installed on the front mold 1 in an inclined sliding manner; the rear mold 2 is inclinedly provided with a guide seat 205 for accommodating the first front mold slide block 106 and the second front mold slide block 107, and the upper end face of the guide seat 205 is perpendicular to the sliding direction of the first front mold slide block 106 and the second front mold slide block 107 relative to the front mold 1; in the process of closing the front mold 1 and the rear mold 2, the first front mold slide block 106 and the second front mold slide block 107 slide into the guide seat 205 respectively until the closing is completed.

[0073] In some embodiments, a front mold slide rail 109 is provided on the front mold 1, and the front mold slide rail 109 is provided at an angle; the first front mold slide block 106 and the second front mold slide block 107 are provided with an insert slide groove 110 that slides with the front mold slide rail 109, and the upper end surface of the guide seat 205 is perpendicular to the front mold slide rail 109 of the front mold 1; Figure 16As shown, a sliding spring 111 is installed between the first front mold sliding block 106 and the second front mold sliding block 107 and the front mold 1 respectively, and a bolt for limiting the extreme displacement of the first front mold sliding block 106 and the second front mold sliding block 107 is installed on the front mold 1. The axial direction of the bolt is parallel to the front mold slide rail 109, and the sliding spring 111 is mounted on the bolt; the axis of the sliding spring 111 is parallel to the sliding direction of the front mold slide rail 109, and the sliding spring 111 always provides a thrust along the sliding direction of the front mold slide rail 109 for the first front mold sliding block 106 and the second front mold sliding block 107.

[0074] In some embodiments, as Figures 9-11 As shown, the first front mold slide block 106 and the second front mold core 113 are correspondingly provided with a molding cavity 114 for forming a sealing soft rubber ring 302. It should be pointed out that the sealing soft rubber ring 302 of the present application is mainly injection molded in the second front mold cavity 102. As long as the first front mold slide block 106 and the second front mold slide block 107 exit the first front mold cavity 101 and the second front mold cavity 102, the air duct joint 301 after injection molding can be left on the rear mold 2 without affecting the secondary injection molding or final demolding of the air duct joint 301.

[0075] In some preferred embodiments, Figure 15 As shown, the bottom of the first front mold slide block 106 and the second front mold slide block 107 are respectively installed with a slide buckle rod 115, and a limit buckle rod 209 is provided on the guide seat 205 for cooperating with the slide buckle rod 115 when the mold is closed. The slide buckle rod 115 and the limit buckle rod 209 form an inverted design; the limit buckle rod 209 is configured to prevent the first front mold slide block 106 from directly opening the mold upward and exiting to damage the air duct joint 301 when the mold is opened; when the mold is closed, the first front mold slide block 106 and the second front mold slide block 107 first enter the guide seat 205 of the rear mold 2, and their slides are The latch rod 115 is inserted into the limit latch rod 209 of the guide seat 205, so that the sliding latch rod 115 and the limit latch rod 209 interfere with each other in the mold opening and closing direction. When the mold is opened, only the sliding latch rod 115 of the first front mold sliding spring block 106 and the second front mold sliding spring block 107 slide outward along the upper end surface of the guide seat 205 (that is, at this time, the sliding exit direction of the first front mold sliding spring block 106 and the second front mold sliding spring block 107 is parallel to the guide seat 205), and the sliding latch rod 115 is completely disengaged from the limit latch rod 209, so as not to damage the air duct joint 301 of the finished workpiece 3.

[0076] In some preferred embodiments, Figure 16As shown, elastic pins 116 with springs are installed on the first front mold slide block 106 and the second front mold slide block 107, and two elastic pins 116 are symmetrically arranged on each front mold slide block; when the mold is closed, the elastic pins 116 abut against the side end of the rear mold core 210, and the elastic pins 116 are configured to eliminate the sliding gap between the first front mold slide block 106 and the second front mold slide block 107 on the front mold slide rail 109, and assist the first front mold slide block 106 and the second front mold slide block 107 to smoothly reset when the mold is opened; Figure 16 In the mold, the elastic pin 116 abuts against the side end face of the rear mold core 210 during mold closing, and the spring on the elastic pin 116 reacts to the first front mold slide block 106 and the second front mold slide block 107, so that it can eliminate the gap of the front mold slide rail 109 sliding in the insert slide groove 110, and provide a thrust to push the first front mold slide block 106 and the second front mold slide block 107 during mold closing, which can be used to assist the first front mold slide block 106 and the second front mold slide block 107 to be smoothly reset.

[0077] In some embodiments, the rear mold 2 is mounted on the rotary workbench 4 ; the front mold 1 is provided with a first pouring port 117 corresponding to the first front mold cavity 101 and a second pouring port 118 corresponding to the second front mold cavity 102 .

[0078] Based on the same inventive concept, an embodiment of this specification further provides a two-color rotary mold molding method, which is implemented based on the two-color rotary mold of any of the aforementioned embodiments and specifically includes the following steps:

[0079] Step S01, one-time mold closing and injection molding; the first pouring gate 117 of the front mold 1 is opened to inject glue, the second pouring gate 118 of the front mold 1 is closed, and the air duct joint 301 is formed by injection molding at the first front mold cavity 101;

[0080] Step S02, one-time mold opening; the first front mold slide spring block 106 and the second front mold slide spring block 107 on the front mold 1 tilt outward to open and exit the mold cavity, and the first shovel 103 and the second shovel 104 of the front mold 1 move upward. The side end surface of the first shovel 103 is flat. When the front mold 1 is opened upward, the first shovel 103 does not drive the insert slider 203 on one side of the rear mold 2 to slide outward and open;

[0081] Step S03, rear mold rotation; rear mold 2 is rotated 180 degrees via the rotary table 4, and the air duct connector 301 of the primary injection molding is transferred to the second front mold cavity 102 and the second front mold slide block 107 of the front mold 1;

[0082] Step S04, secondary mold closing and injection molding; the first pouring gate 117 and the second pouring gate 118 of the front mold 1 are opened respectively to inject glue, and the sealing soft rubber ring 302 is secondary injection-molded on the air duct joint 301 through the second pouring gate 118 and the molding cavity 114 of the second front mold cavity 102 to form the finished workpiece 3;

[0083] Step S05, secondary mold opening; the second shovel 104 of the front mold 1 moves upward with the front mold 1, and the guide chute 105 of the second shovel 104 guides the connecting lock block 204 of the insert slider 203 to slide outward and open;

[0084] Step S06, ejecting the material; ejecting the finished workpiece 3 by the ejector pin to complete the workpiece unloading;

[0085] Step S07, repeat steps S03 to S06.

[0086] In step S03 , the rotary table 4 drives the rear mold 2 to rotate, and transfers the air duct connector 301 after one injection molding to a position directly below the second front mold cavity 102 , and then performs mold closing and injection molding, thereby realizing two-color mold injection molding.

[0087] In step S04, the molding cavity 114 is directly arranged on the first front mold slide block 106 and the second front mold core 113 at the second front mold cavity 102; in steps S02 and S05, the slide exit direction of the first front mold slide block 106 and the second front mold slide block 107 is along the tilted direction of the guide seat 205. When the mold is opened, the slide buckle 115 at the bottom of the first front mold slide block 106 and the second front mold slide block 107 slide out along the tilted direction of the guide seat 205 until they are disengaged from the limit buckle 209 on the guide seat 205; when the front mold 1 and the rear mold 2 are closed, the elastic pins 116 of the first front mold slide block 106 and the second front mold slide block 107 correspondingly abut against the side ends of the rear mold core 210 on the rear mold 1, eliminating the gap between the first front mold slide block 106 and the second front mold slide block 107 when sliding on the front mold slide rail 109 of the front mold 1.

[0088] In this specification, the same or similar parts between the various embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the embodiments described later, the description is relatively simple, and the relevant parts can be referred to the partial description of the previous embodiments.

[0089] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A two-color rotary mold, characterized in that: include: A front mold (1) is provided with a plurality of first front mold cavities (101) for one-time injection molding of air duct joints (301), and a second front mold cavity (102) symmetrically arranged with respect to the first front mold cavity (101), wherein the second front mold cavity (102) is configured to perform secondary injection molding of a sealing soft rubber ring (302) on the air duct joint (301) to form a finished workpiece (3); a plurality of first shovels (103) are provided at the first front mold cavity (101), and a plurality of second shovels (104) symmetrically arranged with respect to the first shovels (103) are provided at the second front mold cavity (102); A rear mold (2) is rotatable along the center of the mold and is provided with a plurality of insert sliders (203) corresponding to the first shovel (103) and the second shovel (104); The side end of the first shovel (103) is a plane, the side end of the second shovel (104) is provided with a guide inclined groove (105), and the insert slider (203) is slidably provided with a connecting lock block (204) that can contact and cooperate with the guide inclined groove (105); when the mold is opened, the guide inclined groove (105) guides the connecting lock block (204) to drive the insert slider (203) to slide outward and open; The first shovel (103) and the second shovel (104) are respectively provided with a shovel inclined surface (108), and the insert slider (203) is provided with a mold closing inclined groove (206) corresponding to the shovel inclined surface (108); the insert slider (203) is provided with a locking block sliding groove (207) for installing the connecting locking block (204); a locking block spring (208) and the connecting locking block (204) are installed in the locking block sliding groove (207), and one end of the connecting locking block (204) is placed in the mold closing inclined groove (206); A first front mold slide block (106) for forming an inclined air outlet of the air duct joint (301) is slidably provided on one side of the first front mold cavity (101), and a second front mold slide block (107) symmetrical to the first front mold slide block (106) is slidably provided on one side of the second front mold cavity (102), and the second front mold slide block (107) is configured to form the sealing soft rubber ring (302); the first front mold slide block (106) and the second front mold slide block (107) are respectively installed on the front mold (1) in an inclined and slidable manner; a guide seat (205) for accommodating the first front mold slide block (106) and the second front mold slide block (107) is obliquely provided on the rear mold (2), and the upper end surface of the guide seat (205) is perpendicular to the sliding direction of the first front mold slide block (106) and the second front mold slide block (107) relative to the front mold (1); A front mold slide rail (109) is obliquely arranged on the front mold (1), and an insert slide groove (110) that slides with the front mold slide rail (109) is correspondingly arranged on the first front mold slide block (106) and the second front mold slide block (107). A slide spring (111) is installed between the first front mold slide block (106) and the second front mold slide block (107) and the front mold (1), respectively, and the axis of the slide spring (111) is parallel to the sliding direction of the front mold slide rail (109).

2. The two-color rotary mold according to claim 1, characterized in that: The front mold (1) is provided with a first front mold core (112) at the first front mold cavity (101) and a second front mold core (113) at the second front mold cavity (102); the first front mold positioning spring block (106) and the second front mold core (113) are correspondingly provided with a molding cavity (114) for forming the sealing soft rubber ring (302).

3. The two-color rotary mold according to claim 2, characterized in that: A sliding latch rod (115) is installed at the bottom of each of the first front mold sliding latch block (106) and the second front mold sliding latch block (107). A limiting latch rod (209) is provided on the guide seat (205) for cooperating with the sliding latch rod (115) when the mold is closed. The limiting latch rod (209) is configured to prevent the first front mold sliding latch block (106) from directly withdrawing from the mold upwards when the mold is opened, thereby damaging the air duct joint (301).

4. The two-color rotary mold according to claim 3, characterized in that: The rear mold (2) is provided with rear mold cavities (201) for closing the mold corresponding to the first front mold cavity (101) and the second front mold cavity (102), respectively. The rear mold (2) is provided with a rear mold core (210) at the rear mold cavity (201). The first front mold sliding spring block (106) and the second front mold sliding spring block (107) are provided with elastic pins (116) with springs. When closing the mold, the elastic pins (116) abut against the side ends of the rear mold core (210).

5. The two-color rotary mold according to claim 4, characterized in that: The rear mold (2) is mounted on a rotating workbench (4); the first front mold cavity (101) and the second front mold cavity (102) are respectively provided with two, and the rear mold cavity (201) is correspondingly provided with four; the front mold (1) is provided with a first pouring port (117) correspondingly connected to the first front mold cavity (101) and a second pouring port (118) correspondingly connected to the second front mold cavity (102).

6. A two-color rotary mold forming method, implemented based on the two-color rotary mold according to claim 5, characterized in that: The steps include: Step S01, one-time mold closing and injection molding; the first pouring gate (117) of the front mold (1) is opened to inject glue, the second pouring gate (118) of the front mold (1) is closed, and the air duct joint (301) is formed by injection molding at the first front mold cavity (101); Step S02, one-time mold opening; the first front mold slide block (106) and the second front mold slide block (107) on the front mold (1) tilt outward to open and exit the mold cavity, the first shovel (103) and the second shovel (104) of the front mold (1) move upward, the side end surface of the first shovel (103) is a plane, and when the front mold (1) is opened upward, the first shovel (103) does not drive the insert slider (203) on one side of the rear mold (2) to slide outward and open; Step S03, rear mold rotation; the rear mold (2) is rotated 180 degrees via the rotary workbench (4), and the air duct joint (301) that is initially injection molded is transferred to the second front mold cavity (102) and the second front mold slide block (107) of the front mold (1); Step S04, secondary mold closing and injection molding; the first pouring gate (117) and the second pouring gate (118) of the front mold (1) are opened respectively to inject glue, and the sealing soft rubber ring (302) is secondary injection-molded on the air duct joint (301) through the second pouring gate (118) and the molding cavity (114) of the second front mold cavity (102) to form a finished workpiece (3); Step S05, secondary mold opening; the second shovel (104) of the front mold (1) moves upward along with the front mold (1), and the guide inclined groove (105) of the second shovel (104) guides the connecting lock block (204) of the insert slider (203) to slide outward and open; Step S06, ejecting the material; ejecting the finished workpiece (3) through an ejector pin to complete the workpiece unloading; Step S07, repeating steps S03 to S06.

7. The two-color rotational mold forming method according to claim 6, characterized in that: In the step S04, the molding cavity (114) is directly arranged on the first front mold slide block (106) and the second front mold core (113) at the second front mold cavity (102); in the step S02 and the step S05, the slide exit direction of the first front mold slide block (106) and the second front mold slide block (107) is along the inclined direction of the guide seat (205); when the mold is opened, the slide buckle (115) at the bottom of the first front mold slide block (106) and the second front mold slide block (107) is along the inclined direction of the guide seat (205) slides out in the inclined direction until it is disengaged from the limiting latch rod (209) on the guide seat (205); when the front mold (1) and the rear mold (2) are closed, the elastic pins (116) of the first front mold sliding block (106) and the second front mold sliding block (107) correspondingly abut against the side ends of the rear mold core (210) on the rear mold (2), eliminating the gap between the first front mold sliding block (106) and the second front mold sliding block (107) when sliding on the front mold slide rail (109) of the front mold (1).

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