A telescopic columnar product pressing mechanism for a two-color mold and a method of using the same

Abstract

The present invention relates to the technical field of plastic processing and molding, and specifically discloses a telescopic columnar product pressing mechanism for a two-color mold and a method of using the same, including: an adjusting rod fixed on a fixed mold for second-color molding, the lower end side wall of the adjusting rod having at least one inclined adjustment surface; a base fixed on a movable mold; a first fixed plate fixed in the movable mold; a pressing mechanism for realizing the pressing of the first-color product; the pressing mechanism includes a sliding block, a second spring, a rotating mechanism, a first pressure head, and a second pressure head; the bottom of the sliding block is slidingly arranged on the base, and the two side walls of the sliding block in its sliding direction are both inclined surfaces; the rotating mechanism corresponds to the inclined surfaces one by one; when the movable mold moves upward to close the mold with the fixed mold, the lower end of the adjusting rod is inserted between the connecting column and the side wall of the base, pushing the sliding block to move, and the movement of the sliding block drives the two rotating mechanisms to close. The present invention can realize the pressing of the first-color product formed by the two-color columnar product when the second-color molding is carried out.

Description

Technical Field

[0001] The invention relates to the technical field of plastic processing and molding, and in particular to a telescopic columnar product pressing mechanism for a two-color mold and a use method thereof. Background Art

[0002] A two-color mold is a two-color injection molding mold, which uses a set of molds to complete the two-color injection molding of the same product. The structure of the two-color mold refers to a two-color mold for making mobile phone cases disclosed in CN202310026188.6. The two-color mold mainly includes two fixed molds (front molds) and two movable molds (rear molds). The first cavity formed between one of the fixed molds and one of the movable molds is used to complete the first color molding of the two-color product. After the first color is molded, the movable mold is rotated 180° so that the second cavity formed between the movable mold and the other fixed mold is used to complete the second color molding of the two-color product.

[0003] When performing the second color molding of a two-color product, it is necessary to compact the product after molding the first color to improve the stability of injection molding during the second color molding process. For example, CN202010909854.7 discloses a telescopic clamping mechanism for a two-color mold. The telescopic clamping mechanism compacts the two-color product by pressing the tongue. The tongue pressing part of this structure can only be used for flat-plate injection molding and cannot be used for the compaction of columnar products. For example, when a columnar cup with two colors on the top and bottom needs to be injection molded, the tongue pressing part cannot compact the columnar cup, and the telescopic mechanism structure for realizing the displacement of the tongue pressing part in the telescopic clamping mechanism is complex. Summary of the invention

[0004] The purpose of the present invention is to provide a telescopic columnar product pressing mechanism for a two-color mold and a method of using the same, so as to achieve the pressing of the first color product when the two-color columnar product is being molded in the second color.

[0005] The present invention is achieved through the following technical solutions:

[0006] A telescopic columnar product pressing mechanism for a two-color mold, comprising:

[0007] An adjusting rod is fixed on the fixed mold for the second color molding, and the lower end side wall of the adjusting rod has at least one inclined adjusting surface;

[0008] A base, fixed on the movable mold;

[0009] A first fixed plate, fixed in the movable mold;

[0010] A pressing mechanism, used to realize pressing of the first color product; the pressing mechanism comprises a sliding block, a second spring, a rotating mechanism, a first pressing head and a second pressing head;

[0011] The bottom of the sliding block is slidably arranged on the base, and the two side walls of the sliding block in the sliding direction are both inclined surfaces; the rotating mechanisms correspond to the inclined surfaces one by one, and one end of the two rotating mechanisms is connected by a second spring, and is always in contact with the inclined surface through the restoring force of the second spring; the other ends of the two rotating mechanisms are each provided with a first pressing head; the second pressing head is arranged at the small end of the sliding block, and the two first pressing heads and the second pressing head press the first color product at different circumferential positions;

[0012] A connecting column, one end of which is connected to the large end of the sliding block, and the other end of which is spaced apart from the side wall of the base, and the connecting column and the side wall of the base are connected via a first spring;

[0013] When the movable mold moves upward to close the fixed mold, the lower end of the adjusting rod is inserted into the gap between the connecting column and the side wall of the base, pushing the sliding block to move, and the movement of the sliding block drives the two rotating mechanisms to close.

[0014] The original intention of the present invention is to realize the compression of the first color product formed when the columnar product is being formed in the second color. However, in the prior art, there is no compression device for columnar products designed for two-color molds.

[0015] According to the characteristics of the movable mold and the fixed mold being closed, the present invention designs a sliding mechanism that can realize the opening and closing of the first pressure head and the second pressure head in the clamping mechanism, wherein the sliding mechanism includes a sliding block, a connecting column, a first spring, a base and an adjusting rod. In the process of the movable mold moving upward to close the movable mold and the fixed mold, a relative displacement occurs between the adjusting rod and the base. The inclined adjustment surface provided at the lower part of the adjusting rod and the change in the inclination of the inclined adjustment surface are used to push the sliding block to slide close to the first color product until the first pressure head and the second pressure head press different circumferential positions of the first color product, thereby realizing multi-point clamping and improving the stability of the clamping mechanism in pressing the columnar first color product.

[0016] At the same time, the present invention realizes that the sliding block drives the two rotating mechanisms to open and close while sliding on the base through reasonable design of the structure of the sliding block and the structure of the rotating mechanism: when the sliding block slides close to the first color product, the two rotating mechanisms rotate to make the two second pressure heads approach each other until the first pressure head and the second pressure head press the first color product at different circumferential positions; when the sliding block slides away from the first color product, the two rotating mechanisms rotate to make the two second pressure heads move away from each other, and finally under the action of the restoring force of the first spring, the sliding block returns to its initial position, at this time, there is a distance between the first pressure head and the second pressure head and the first color product, and the clamping mechanism does not produce a clamping effect on the first color product.

[0017] In summary, the present invention can realize the compression of the first color product when the second color of the two-color columnar product is being molded.

[0018] In a preferred embodiment, the rotating mechanism includes a guide slider, a first support arm, a turntable and a second support arm; the turntable is rotatably connected to the first fixed plate; one end of the first support arm is connected to the turntable, and the other end is provided with a guide slider that always abuts against the inclined surface; one end of the second support arm is connected to the turntable, and the other end is provided with a first pressure head for clamping the first color product, and the two first support arms are connected by a second spring.

[0019] The rotating mechanism of the above structure can use the restoring force of the second spring to ensure that the guide slider is always in contact with the inclined surface of the sliding block, and the rotating mechanism can rotate around the first fixed plate by sliding the guide slider to different positions of the inclined surface, thereby realizing the opening and closing of the two rotating mechanisms.

[0020] In a preferred embodiment, an angle greater than 90° is formed between the first support arm and the second support arm; a slide groove is provided on the inclined surface, and the guide slider is slidably disposed in the slide groove.

[0021] The arrangement of the above-mentioned slide groove can improve the stability of the guide slider sliding on the inclined surface. Setting the angle between the first support arm and the second support arm as an obtuse angle is conducive to improving the stability of the second pressure head pressing the first color product, because when the second pressure head presses the first color product, the angle between the first support arm and the second support arm is an obtuse angle. Compared with an acute angle, the entire second support arm and the first color product have a smaller angle, which improves the clamping effect of the second support arm on the first color product.

[0022] In a preferred embodiment, a first U-shaped groove is provided at the other end of the first support arm, and the guide slider is provided between two side walls of the first U-shaped groove.

[0023] In a preferred embodiment, a protrusion is provided at the other end of the first support arm, and two ends of the second spring are respectively connected to the two protrusions.

[0024] In a preferred embodiment, a second U-shaped groove is provided at the other end of the second support arm, a fixed shaft is provided between the two side walls of the second U-shaped groove, and the first pressure head is fixed on the fixed shaft; the first pressure head is a columnar structure, and the first pressure head has the same axial direction as the first color product.

[0025] Setting the first pressing head as a columnar structure can not only realize the compression of the first color product, but also avoid the first pressing head and the first color product having excessive contact area. At the same time, the first pressing head of the present invention and the first color product can be equivalent to line contact, which has better stability than point contact, and can reduce the contact surface compared with surface contact. Since the present invention adopts three points (one first pressing head and two second pressing heads) for compression in the circumferential direction of the first color product, and utilizes the radial force of the first pressing head and the second pressing head to realize compression of the columnar product, the stability of line contact is sufficient.

[0026] In a preferred embodiment, an adjustment cavity is provided in the small end of the sliding block;

[0027] The second pressure head includes two pressing blocks, a pressure sensor is arranged in the pressing block, one end of the pressing block is connected to the adjusting slider through a fourth spring, the two adjusting sliders are connected through an electric telescopic rod, and the fourth spring is always in a compressed state;

[0028] The second pressure head also includes a second fixed plate, one end of which is fixed in the adjustment cavity, and the adjustment slider is slidably connected to the second fixed plate.

[0029] In a preferred embodiment, the two pressing blocks are connected via a third spring; the pressing block is a columnar structure, and the pressing block and the first color product have the same axial direction.

[0030] The pressure sensor of the present invention can collect the pressure exerted on the pressing block when it presses the first color product in real time. When the collected pressure is greater than the set upper limit threshold, the controller controls the electric telescopic rod to extend so that the two pressing blocks move away from each other. Since the pressing object of the present invention is a columnar product, when the two pressing blocks move away from each other or approach each other, the restoring force generated by the fourth spring is different: when the two pressing blocks move away from each other, the distance between the pressing point of the pressing block on the first color product and the adjusting slider gradually increases. At this time, the restoring force of the fourth spring gradually decreases, and the pressing block is also lowered accordingly; when the two pressing blocks approach each other, the distance between the pressing point of the pressing block on the first color product and the adjusting slider gradually decreases. At this time, the restoring force of the fourth spring gradually increases, and the pressing block is also increased accordingly.

[0031] In a preferred embodiment, the first fixed plate is connected to the base via a connecting rod; the adjusting rod is fixed in the fixed mold via a positioning plate.

[0032] A method for using a telescopic columnar product pressing mechanism for a two-color mold comprises the following steps:

[0033] S1, closing the movable mold with the fixed mold without the adjusting rod to complete the first color molding of the columnar product to form a first color product;

[0034] S2. Open the mold and rotate 180° to form a movable mold with the first color product, so that it is molded with the fixed mold provided with an adjusting rod. During the mold closing process, the lower end of the adjusting rod is embedded between the connecting column and the side wall of the base, pushing the sliding block to move close to the first color product. The movement of the sliding block drives the two rotating mechanisms to close, so that the clamping mechanism clamps the first color product, completing the second color molding of the columnar product to form a two-color columnar product.

[0035] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0036] 1. Based on the characteristics of the movable mold and the fixed mold, the present invention designs a sliding mechanism that can realize the opening and closing of the first pressure head and the second pressure head in the clamping mechanism. During the clamping process, the inclination change of the inclined adjustment surface at the lower part of the adjustment rod is used to push the sliding block to slide close to the first color product; and through the reasonable design of the structure of the sliding block and the rotating mechanism, when the sliding block slides close to the first color product, the two rotating mechanisms rotate to make the two second pressure heads approach each other; until the first pressure head and the second pressure head press different positions of the first color product in the circumferential direction, multi-point clamping is achieved, thereby improving the stability of the clamping mechanism in pressing the columnar first color product.

[0037] 2. According to the present invention, the first color product to be compressed is a columnar product, and the outer contour of the columnar product is circular. Based on this feature, the structure of the second pressure head is reasonably designed. The radial distance between the two compression blocks can be adjusted by controlling the extension and retraction of the electric telescopic rod, thereby adjusting the pressure exerted by the second pressure head on the first color product, thereby achieving the compression effect on the first color product and avoiding damage to the first color product caused by excessive pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0039] Figure 1 It is a schematic diagram of the telescopic columnar product pressing mechanism of the present invention used for pressing the first color product;

[0040] Figure 2 It is a schematic diagram of the telescopic columnar product pressing mechanism of the present invention when it is not used to press the first color product;

[0041] Figure 3 It is a schematic diagram of the pressing mechanism of the present invention used for pressing the first color product;

[0042] Figure 4 for Figure 3 A partial enlarged view of the middle A;

[0043] Figure 5 It is a schematic diagram of the clamping mechanism of the present invention not clamping the first color product.

[0044] Marks and corresponding parts names in the attached drawings:

[0045] 1-positioning plate; 2-adjusting rod; 3-first spring; 4-base; 5-connecting column; 6-clamping mechanism; 7-first fixed plate; 8-connecting rod; 9-first color product; 21-tilt adjustment surface; 61-sliding block; 62-second spring; 63-guide slider; 64-first support arm; 65-turntable; 66-second support arm; 67-first pressure head; 68-second pressure head; 71-positioning shaft; 611-inclined surface; 612-adjusting cavity; 613-slide groove; 641-bump; 661-fixed shaft; 681-clamping block; 682-third spring; 683-fourth spring; 684-adjusting slider; 685-second fixed plate; 686-electric telescopic rod. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with the embodiments. The schematic implementation mode of the present invention and its description are only used to explain the present invention and are not intended to limit the present invention. The embodiments described below are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0047] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present invention. However, it is apparent to those of ordinary skill in the art that these specific details do not have to be employed to practice the present invention. In other embodiments, in order to avoid confusing the present invention, known structures, materials or methods are not specifically described. The materials, instruments and reagents used in the following examples, unless otherwise specified, can be obtained from commercial sources. The technical means used in the examples, unless otherwise specified, are conventional means well known to those skilled in the art.

[0048] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0049] Embodiment 1:

[0050] like Figure 1-Figure 5 As shown, in order to realize the pressing of the first color product 9 formed when the columnar product is formed in the second color, this embodiment provides a telescopic columnar product pressing mechanism for a two-color mold, including:

[0051] The adjusting rod 2 is fixed on the fixed mold for the second color molding, and the lower end side wall of the adjusting rod 2 has at least one inclined adjustment surface 21; the inclined adjustment surface 21 specifically refers to a surface with an inclination, and the inclined adjustment surface 21 makes the width of the lower end side wall of the adjusting rod 2 gradually decrease from top to bottom. Therefore, the width change of the lower end side wall of the adjusting rod 2 can be used to promote the movement of the sliding structure in contact with it. In the specific implementation, in order to facilitate the installation of the adjusting rod 2 on the fixed mold for the second color molding, a positioning plate 1 is set on the top of the adjusting rod 2. The positioning plate 1 can be a square plate. The positioning plate 1 is fixed to the fixed mold for the second color molding by the positioning plate 1 and bolts. The adjusting rod 2 can be a square plate or a column. When the adjusting rod 2 is a square plate, the lower part of the adjusting rod 2 is an isosceles trapezoid or a right-angled trapezoid with a gradually decreasing width. When it is a right-angled trapezoid, the lower end side wall of the adjusting rod 2 has an inclined adjustment surface 21. When it is an isosceles trapezoid, such as Figure 1 As shown, the lower end side wall of the adjusting rod 2 has two symmetrically arranged inclined adjusting surfaces 21. When the adjusting rod 2 is a column, the lower part of the adjusting rod 2 is a directly gradually reduced truncated cone structure.

[0052] The base 4 is fixed on the movable mold; the main functions of the base 4 include cooperating with the adjusting rod 2, so that the tilt adjustment surface 21 has the corresponding function of pushing the movement of the slidable structure in contact with it, and as a sliding base, realizing the sliding of the slidable structure. A specific structure of the base 4 is:

[0053] A flange is provided at the bottom of the base 4, and the base 4 is fixedly connected to the movable mold by cooperation with the flange and the bolts. The top of the base 4 is recessed downward to form a U-shaped groove, and one of the side walls of the U-shaped groove is higher than the other side wall. Specifically, the top of the base 4 can form a first plane and a second plane on both sides of the U-shaped groove, respectively, wherein the height of the first plane is lower than the height of the second plane, and a slide rail or a radial slide groove is provided on the first plane, wherein the radial slide groove is relative to the radial direction of the first color product 9, wherein when the U-shaped groove is in mold closing, the adjusting rod 2 provides an accommodating space for the adjusting rod 2 when it moves downward relative to the base 4.

[0054] The first fixing plate 7 is fixed in the movable mold; the first fixing plate 7 can be directly fixed on the movable mold by bolts, such as Figure 1 As shown, it can also be connected to the base 4 through a connecting rod 8. In this embodiment, preferably, a first fixing plate 7 is connected to the base 4 through two connecting rods 8 respectively.

[0055] The pressing mechanism 6 is used to press the first color product 9; the pressing mechanism 6 of this embodiment adopts three-point pressing, that is, pressing is performed at three different positions on the circumference of the first color product 9. In a specific implementation structure, the pressing mechanism 6 includes a sliding block 61, a second spring 62, a rotating mechanism, a first pressing head 67 and a second pressing head 68;

[0056] The bottom of the sliding block 61 is slidably set on the first plane on the base 4, and the two side walls of the sliding block 61 in its sliding direction are both inclined surfaces 611. The sliding block 61 specifically includes a sliding plate in an isosceles trapezoidal shape, and a sliding block is set at the bottom of the sliding plate to cooperate with the sliding rail or radial sliding groove on the first plane. The end of the sliding block 61 close to the first color product 9 is a small end, and the end away from the first color product 9 is a large end.

[0057] The rotating mechanism corresponds to the inclined surface 611 one by one, and one end of the two rotating mechanisms is connected by the second spring 62, and is always in contact with the inclined surface 611 by the restoring force of the second spring 62; the other end of the two rotating mechanisms is provided with a first pressing head 67; the second pressing head 68 is provided at the small end of the sliding block 61, and the two first pressing heads 67 and the second pressing heads 68 press the first color product 9 at three different positions in the circumferential direction; one of the rotating mechanisms is specifically:

[0058] The rotating mechanism includes a guide slider 63, a first support arm 64, a turntable 65 and a second support arm 66; the turntable 65 is rotatably connected to the first fixed plate 7; one end of the first support arm 64 is connected to the turntable 65, and the other end is provided with a guide slider 63 that is always in contact with the inclined surface 611; one end of the second support arm 66 is connected to the turntable 65, and the other end is provided with a first pressure head 67 for clamping the first color product 9, and the two first support arms 64 are connected by a second spring 62.

[0059] Preferably, the first support arm 64 and the second support arm 66 form an angle greater than 90°.

[0060] Preferably, a slide groove 613 is provided on the inclined surface 611 , and the guide slider 63 is slidably disposed in the slide groove 613 .

[0061] Preferably, a first U-shaped groove is provided at the other end of the first supporting arm 64 , and the guide slider 63 is provided between two side walls of the first U-shaped groove.

[0062] Preferably, a protrusion 641 is provided at the other end of the first support arm 64 , and two ends of the second spring 62 are respectively connected to the two protrusions 641 .

[0063] Preferably, a second U-shaped groove is provided at the other end of the second support arm 66, a fixed shaft 661 is provided between the two side walls of the second U-shaped groove, and the first pressing head 67 is fixed on the fixed shaft 661; the first pressing head 67 is a columnar structure, and the first pressing head 67 has the same axial direction as the first color product 9.

[0064] In this embodiment, the second pressing head 68 is disposed at the small end of the sliding block 61 and has the same structure as the first pressing head 67 . Preferably, the first pressing head 67 and the second pressing head 68 are made of plastic with a certain elasticity.

[0065] The connecting column 5 has one end connected to the large end of the sliding block 61, and the other end has a gap with the side wall of the base 4, and the connecting column 5 and the side wall of the base 4 are connected by the first spring 3; when the adjusting rod 2 moves downward relative to the base 4, since the width of the lower part of the adjusting rod 2 gradually decreases from top to bottom, when the movable mold moves upward to close the mold with the fixed mold, the lower end of the adjusting rod 2 is inserted into the gap between the connecting column 5 and the side wall of the base 4, and as the adjusting rod 2 moves downward relatively, the width of the adjusting rod 2 increases, and the sliding block 61 is pushed to move close to the first color product 9 by the change in width, and the movement of the sliding block 61 drives the two rotating mechanisms to close, that is, the two first pressing heads 67 are close to each other At this time, the first pressing head 67 and the second pressing head 68 realize three-point pressing on the first color product 9. In a specific embodiment, the angle between the pressing point between the second pressing head 68 and the first color product 9 and the pressing point between the first pressing head 67 and the first color product 9 is 120° or slightly greater than 120°, and can be 130° or 140°, etc. The angle here specifically refers to the angle between the pressing point and the line connecting the axial center point of the first color product 9. For example, when the angle between the pressing point between the second pressing head 68 and the first color product 9 and the pressing point between the first pressing head 67 and the first color product 9 is 120°, the three pressing points equally divide the circumference of the first color product 9. When demolding, when the adjusting rod 2 moves upward relative to the base 4, that is, the adjusting rod 2 and the base 4 are gradually separated, under the action of the restoring force of the first spring 3, the sliding block 61 returns to the initial position, and the two first pressing heads 67 move away from each other. At this time, the first pressing head 67 and the second pressing head 68 lose the pressing on the first color product 9.

[0066] The method of this embodiment comprises the following steps:

[0067] S1, closing the movable mold with the fixed mold without the adjusting rod 2, completing the first color molding of the columnar product to form a first color product 9;

[0068] S2. Open the mold and rotate 180° to form a movable mold with the first color product 9, so that it can be molded with the fixed mold provided with an adjusting rod 2. During the mold closing process, the lower end of the adjusting rod 2 is embedded between the connecting column 5 and the side wall of the base 4, pushing the sliding block 61 to move close to the first color product 9. The movement of the sliding block 61 drives the two rotating mechanisms to close, thereby realizing the clamping mechanism 6 to clamp the first color product 9, completing the second color molding of the columnar product to form a two-color columnar product.

[0069] The working principle of this embodiment is as follows:

[0070] The two-color mold of this embodiment includes a mold A for first-color molding to form a first-color product 9 and a mold B for second-color molding to form a two-color product; mold A includes a movable mold and a fixed mold, a first molding cavity is formed between the movable mold and the fixed mold of mold A, and a base 4 and a clamping mechanism 6 are installed in the movable mold of mold A; mold B includes a movable mold and a fixed mold, a base 4 and a clamping mechanism 6 are installed in the movable mold of mold B, and an adjusting rod 2 is installed in the fixed mold of mold B.

[0071] When the first color molding is performed, after the mold is closed, there is no adjusting rod 2 set in the fixed mold of mold A, so the clamping mechanism 6 on the movable mold of mold A will not penetrate into the first molding cavity and will not affect the injection molding of the first color molding. After the first color product 9 is molded, that is, the lower half of the two-color columnar product is molded, the movable mold and the fixed mold of mold A are separated, and the movable mold of mold A is rotated 180°. At this time, the first color product 9 is molded on the movable mold of mold A, that is, the movable mold with the first color product 9 is rotated to the bottom of the fixed mold of mold B to close the mold. Since the fixed mold of mold B is provided with an adjusting rod 2, during the mold closing During the process, the adjusting rod 2 and the base 4 cooperate with each other to make the sliding block 61 move close to the first color product 9, so that the two first pressing heads 67 are close to each other; at this time, the first pressing head 67 and the second pressing head 68 realize three-point pressing on the first color product 9, and the second color is injected to form a two-color columnar product; when demolding, the adjusting rod 2 moves upward relative to the base 4, that is, the adjusting rod 2 and the base 4 are gradually separated. Under the action of the restoring force of the first spring 3, the sliding block 61 returns to the initial position, and the two first pressing heads 67 move away from each other. At this time, the first pressing head 67 and the second pressing head 68 lose the pressing force on the first color product 9.

[0072] Embodiment 2:

[0073] This embodiment is based on the embodiment 1, and the difference from the embodiment 1 is that the specific structure of the second pressure head 68 is different:

[0074] An adjustment cavity 612 is disposed in the small end of the sliding block 61 , and an end of the adjustment cavity 612 close to the first color product 9 has an opening.

[0075] The second pressure head 68 includes two clamping blocks 681, and a pressure sensor is arranged in the clamping block 681. The pressure sensor is used to collect the pressure exerted on the clamping block 681 in real time. The side of the clamping block 681 away from the second pressure head 68 is connected to the adjusting slider 684 through the fourth spring 683. The fourth spring 683 can be extended and retracted in the radial direction of the first color product 9, and the fourth spring 683 is always in a compressed state during the process of clamping the first color product 9. The two adjusting sliders 684 are connected by an electric telescopic rod 686. The electric telescopic rod 686 preferably adopts a pen-type telescopic rod, and its extension and retraction can be controlled by a controller. The extension direction of the electric telescopic rod 686 is perpendicular to the moving direction of the sliding block 61. The distance between the two clamping blocks 681 is adjusted by controlling the extension and retraction of the electric telescopic rod 686. The compression length of the fourth spring 683 is adjusted by changing the distance between the two clamping blocks 681, and the pressure exerted on the clamping block 681 can be adjusted.

[0076] The second pressing head 68 further includes a second fixing plate 685 , one end of which is fixed in the adjusting cavity 612 , and the adjusting slider 684 is slidably connected to the second fixing plate 685 to accommodate the adjustment of the distance between the two pressing blocks 681 .

[0077] Preferably, the two clamping blocks 681 are connected by a third spring 682, and the third spring 682 is arranged between the first color product 9 and the electric telescopic rod 686. The elastic effect of the third spring 682 can be used to improve the stability of the relative movement of the two clamping blocks 681.

[0078] Preferably, the pressing block 681 is a columnar structure, and the pressing block 681 and the first color product 9 have the same axial direction; the pressing block 681 is preferably made of plastic.

[0079] This embodiment also includes a controller during implementation. The electric telescopic rod 686 is a prior art and its extension and retraction can be controlled by the controller.

[0080] The second pressure head 68 of the structure described in this embodiment can adjust the pressure on the first color product 9:

[0081] The pressure sensor can collect the pressure exerted on the pressing block 681 when it presses the first color product 9 in real time. When the collected pressure is greater than the set upper limit threshold, the controller controls the electric telescopic rod 686 to extend, so that the two pressing blocks 681 move away from each other. Since the pressing object of this embodiment is a columnar product, when the two pressing blocks 681 move away from each other or approach each other, the restoring force generated by the fourth spring 683 is different: when the two pressing blocks 681 move away from each other, the distance between the pressing point of the pressing block 681 on the first color product 9 and the adjusting slider 684 gradually increases. At this time, the restoring force of the fourth spring 683 gradually decreases, and the pressing block 681 also decreases accordingly; when the two pressing blocks 681 approach each other, the distance between the pressing point of the pressing block 681 on the first color product 9 and the adjusting slider 684 gradually decreases. At this time, the restoring force of the fourth spring 683 gradually increases, and the pressing block 681 also increases accordingly.

[0082] The above specific implementation methods further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific implementation methods of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0083] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and the like cited in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of the relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

Claims

1. A telescopic columnar product pressing mechanism for a two-color mold, characterized in that: include: An adjusting rod (2) is fixed on the fixed mold for second color molding, and the lower end side wall of the adjusting rod (2) has at least one inclined adjusting surface (21); A base (4) fixed on the movable mold; A first fixed plate (7) fixed in the movable mold; A pressing mechanism (6) for pressing the first color product (9); the pressing mechanism (6) comprises a sliding block (61), a second spring (62), a rotating mechanism, a first pressing head (67), and a second pressing head (68); The bottom of the sliding block (61) is slidably arranged on the base (4), and the two side walls of the sliding block (61) in the sliding direction are both inclined surfaces (611); the rotating mechanism corresponds to the inclined surfaces (611) one by one, and one end of the two rotating mechanisms is connected by the second spring (62), and is always in contact with the inclined surface (611) due to the restoring force of the second spring (62); the other end of the two rotating mechanisms is provided with the first pressing head (67); the second pressing head (68) is arranged at the small end of the sliding block (61), and the two first pressing heads (67) and the second pressing heads (68) press the first color product (9) at different circumferential positions; A connecting column (5), one end of which is connected to the large end of the sliding block (61), and the other end of which is spaced apart from the side wall of the base (4), and the connecting column (5) and the side wall of the base (4) are connected via a first spring (3); When the movable mold moves upward to close the fixed mold, the lower end of the adjusting rod (2) is inserted into the gap between the connecting column (5) and the side wall of the base (4), pushing the sliding block (61) to move, and the movement of the sliding block (61) drives the two rotating mechanisms to close.

2. The telescopic columnar product pressing mechanism for a two-color mold according to claim 1, characterized in that: The rotating mechanism comprises a guide slider (63), a first support arm (64), a rotating disk (65) and a second support arm (66); the rotating disk (65) is rotatably connected to the first fixed plate (7); one end of the first support arm (64) is connected to the rotating disk (65), and the other end is provided with the guide slider (63) which is always in contact with the inclined surface (611); one end of the second support arm (66) is connected to the rotating disk (65), and the other end is provided with the first pressure head (67) for clamping the first color product (9); the two first support arms (64) are connected via the second spring (62).

3. The telescopic columnar product pressing mechanism for a two-color mold according to claim 2, characterized in that: An angle greater than 90° is formed between the first support arm (64) and the second support arm (66); a slide groove (613) is provided on the inclined surface (611), and the guide sliding block (63) is slidably disposed in the slide groove (613).

4. The telescopic columnar product pressing mechanism for a two-color mold according to claim 2, characterized in that: The other end of the first support arm (64) is provided with a first U-shaped groove, and the guide sliding block (63) is arranged between two side walls of the first U-shaped groove.

5. The telescopic columnar product pressing mechanism for a two-color mold according to claim 2, characterized in that: The other end of the first support arm (64) is provided with a protrusion (641), and the two ends of the second spring (62) are respectively connected to the two protrusions (641).

6. The telescopic columnar product pressing mechanism for a two-color mold according to claim 2, characterized in that: A second U-shaped groove is provided at the other end of the second support arm (66), a fixed shaft (661) is provided between two side walls of the second U-shaped groove, and the first pressing head (67) is fixed on the fixed shaft (661); the first pressing head (67) is a columnar structure, and the first pressing head (67) and the first color product (9) have the same axial direction.

7. The telescopic columnar product pressing mechanism for a two-color mold according to claim 1, characterized in that: An adjustment cavity (612) is provided in the small end of the sliding block (61); The second pressure head (68) comprises two pressing blocks (681), a pressure sensor is arranged inside the pressing block (681), one end of the pressing block (681) is connected to the adjustment slider (684) via a fourth spring (683), the two adjustment sliders (684) are connected via an electric telescopic rod (686), and the fourth spring (683) is always in a compressed state; The second pressure head (68) further comprises a second fixing plate (685), one end of the second fixing plate (685) being fixed in the adjustment cavity (612), and the adjustment slider (684) being slidably connected to the second fixing plate (685).

8. The telescopic columnar product pressing mechanism for a two-color mold according to claim 7, characterized in that: The two pressing blocks (681) are connected via a third spring (682); the pressing block (681) is a columnar structure, and the pressing block (681) and the first color product (9) have the same axial direction.

9. A telescopic columnar product pressing mechanism for a two-color mold according to any one of claims 1 to 8, characterized in that: The first fixed plate (7) is connected to the base (4) via a connecting rod (8); the adjusting rod (2) is fixed in the fixed mold via a positioning plate (1).

10. The method for using the telescopic columnar product pressing mechanism for a two-color mold according to any one of claims 1 to 9, characterized in that: The steps include: S1, closing the movable mold with the fixed mold which is not provided with the adjusting rod (2), completing the first color molding of the columnar product to form the first color product (9); S2, opening the mold and rotating it 180 degrees to form a movable mold with the first color product (9), so that it is molded with the fixed mold provided with the adjusting rod (2). During the mold closing process, the lower end of the adjusting rod (2) is embedded between the connecting column (5) and the side wall of the base (4), pushing the sliding block (61) to move closer to the first color product (9). The movement of the sliding block (61) drives the two rotating mechanisms to close, so that the clamping mechanism (6) can clamp the first color product (9), and complete the second color molding of the columnar product to form a two-color columnar product.

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