Injection mold and injection molding machine

Abstract

The utility model discloses an injection mold and an injection molding machine, which achieve the purpose of improving the stability and the surface quality of a product with local thickness change manufactured by the injection mold at lower cost. The injection mold comprises a fixed mold plate, a movable mold plate and a bottom plate, and the movable mold plate is located between the fixed mold plate and the bottom plate. The injection mold further comprises an impact mechanism, the impact mechanism comprises a pulling plate assembly, the pulling plate assembly is located between the bottom plate and the movable mold plate and comprises an impact part, and the pulling plate assembly moves up and down between the bottom plate and the movable mold plate so that the impact part can get close to or leave a cavity located in the fixed mold plate; and the power part is connected with the pulling plate assembly and used for providing power to drive the pulling plate assembly to move up and down.

Description

Technical Field

[0001] The utility model belongs to the technical field of plastic molding, and in particular relates to an injection mold and an injection molding machine. Background Art

[0002] Plastic products such as air conditioner panels often require thinner wall thickness in certain locations to meet specific requirements. When plastic products with varying wall thickness are injection molded using an injection molding machine, appearance defects such as shrinkage marks and weld lines are easily generated at the intersection of thickness and thinness, affecting product stability. Related technologies typically use mold temperature variation technology, which sets the injection mold to a mold that can be quickly cooled and heated, and uses heating and cooling systems to control the mold temperature, thereby improving the stability and surface quality of the injection molded product. The implementation of temperature variation technology requires additional supporting heating and cooling systems, which not only increases equipment costs but also increases energy consumption during the injection molding process. Summary of the Invention

[0003] One purpose of the utility model is to provide an injection mold, which improves the stability and surface quality of products with local thickness variations manufactured by the injection mold at a lower cost by improving the injection mold structure.

[0004] In order to solve the above technical problems, the injection mold provided by the present invention adopts the following technical solutions:

[0005] An injection mold comprises a fixed platen, a movable platen and a bottom plate, wherein the movable platen is located between the fixed platen and the bottom plate;

[0006] The injection mold further includes an impact mechanism, which includes:

[0007] a pull plate assembly located between the bottom plate and the movable plate, comprising an impact member, wherein the pull plate assembly moves up and down between the bottom plate and the movable plate so that the impact member approaches or leaves the cavity located inside the fixed plate;

[0008] A power component is connected to the pull plate assembly and is used to provide power to drive the pull plate assembly to move up and down.

[0009] In some embodiments of the present application, the pull plate assembly includes:

[0010] a plate body, the impact member being formed on the plate body;

[0011] An adjusting member is formed on the plate body and is used to adjust the distance that the pulling plate assembly moves toward the movable platen, thereby adjusting the distance that the impact member extends into the cavity.

[0012] In some embodiments of the present application, the adjusting member is detachably formed on the plate body.

[0013] In some embodiments of the present application, the adjusting member includes:

[0014] a fixing portion detachably connected to the plate body;

[0015] A limiting portion is connected to the fixing portion and extends from the fixing portion toward the movable template in a length direction; when the limiting portion contacts the movable template, the pulling plate assembly stops moving toward the movable template.

[0016] In some embodiments of the present application, the power component is a hydraulic cylinder, an end cover of the hydraulic cylinder is connected to the plate body, and an extended end of the piston rod of the hydraulic cylinder is connected to the base plate.

[0017] In some embodiments of the present application, the power component includes two hydraulic cylinders, and the two hydraulic cylinders are symmetrically arranged at two opposite end positions of the plate body.

[0018] In some embodiments of the present application, the injection mold further comprises:

[0019] A pull plate guide, one end of which is connected to the bottom plate and the other end of which passes through the plate body, is used to guide the movement of the pull plate assembly.

[0020] In some embodiments of the present application, the injection mold further comprises:

[0021] A buffer pad is arranged on the side of the plate body facing the bottom plate and / or on the side of the bottom plate facing the plate body.

[0022] In some embodiments of the present application, the impact member includes:

[0023] An impact rod, one end of which is connected to the plate body and the other end of which extends toward the movable platen;

[0024] An impact head is formed on one end of the impact rod close to the movable platen.

[0025] Another object of the present utility model is to provide an injection molding machine that can improve the stability and surface quality of products with local thickness variations manufactured by injection molds at a lower cost; the injection molding machine includes an injection system, a cooling system and a clamping system, and the injection molding machine also includes the above-mentioned injection mold.

[0026] Compared with the prior art, the advantages and positive effects of the present invention are:

[0027] The injection molding machine and injection mold provided by the utility model are provided with an impact mechanism including a pull plate assembly and a power component in the mold. The pull plate assembly is provided between the bottom plate and the movable plate of the mold and moves between the two plates under the drive of the power component, so that the impact member in the pull plate assembly is close to the cavity inside the fixed plate, and can impact and thin the wall thickness of the injection molded product in the cavity, thereby obtaining an injection molded product with local thickness variation. By providing the impact mechanism, the product with thickness variation is obtained by impact and thinning with the impact member, which is less likely to have appearance defects and improves the stability and surface quality of the product. The impact mechanism has a simple structure and low cost and is easy to configure and use in the mold, so that the purpose of improving the stability and surface quality of the product with local thickness variation manufactured by the injection mold can be achieved with simple structural improvement and low cost. In addition, the power component is directly connected to the pull plate assembly, and no additional structure is required for driving connection, which makes the impact mechanism structure simpler and also reduces the occupation of the internal space of the mold.

[0028] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, a brief introduction will be given below to the drawings required for use in the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 A three-dimensional diagram of an embodiment of the injection mold provided by the utility model;

[0031] Figure 2 for Figure 1 a cross-sectional view of an embodiment;

[0032] Figure 3 for Figure 1 A schematic diagram of part of the internal structure of the embodiment;

[0033] Figure 4 for Figure 1 One of the partial structural perspective views of the embodiment;

[0034] Figure 5 for Figure 1 Partial structural perspective view of the embodiment 2;

[0035] Figure 6 for Figure 1 Exploded view of part of the structure of the embodiment.

[0036] In each figure, the reference numerals and their corresponding component names are as follows:

[0037] 1. Fixed template;

[0038] 2. Dynamic template;

[0039] 3. Bottom plate;

[0040] 4. Cavity;

[0041] 5. Core;

[0042] 6. Ejector plate; 61. Ejector plate guide;

[0043] 7. Injection molding products;

[0044] 8. Impact mechanism;

[0045] 81. Power component; 811. End cover; 812. Extended end of piston rod;

[0046] 82. Pull plate assembly;

[0047] 821, plate body; 8211, guide hole;

[0048] 822, adjusting member; 8221, fixing portion; 8222, limiting portion;

[0049] 823, screws;

[0050] 824, impact member; 8241, impact rod; 8242, impact head;

[0051] 825, pull plate guide;

[0052] 826. Cushion. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0054] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0055] In the description of the present invention, “a plurality of” means at least two, such as two, three, etc., unless otherwise clearly defined.

[0056] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can refer to fixed connection, detachable connection, or integration; "connection" can refer to mechanical connection or electrical connection; it can refer to direct connection or indirect connection through an intermediate medium; it can refer to internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0057] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0058] Figures 1 to 6 An embodiment of the injection mold provided by the utility model is shown.

[0059] Combine Figure 1-6 As shown, the injection mold includes a fixed mold plate 1, a movable mold plate 2 and a bottom plate 3, and the movable mold plate 2 is located between the fixed mold plate 1 and the bottom plate 3. Figure 1 In the three-dimensional diagram shown, from top to bottom are the fixed template 1, the movable template 2 and the base plate 3.

[0060] A cavity 4 is provided in the fixed mold plate 1, and a core 5 is provided in the movable mold plate 2. The cavity 4 and the core 5 cooperate to form a molding space for the product. Molten material is injected into the cavity 4 through a hot runner to obtain an injection molded product 7.

[0061] An ejector plate 6 is further provided between the movable plate 2 and the base plate 3 , and an ejector plate guide 61 is provided on the base plate 3 . The ejector plate guide 61 passes through the ejector plate 6 to guide the movement of the ejector plate 6 .

[0062] The functions and mutual coordination of each structure are prior art and will not be described in detail. In addition, the injection mold also includes some other conventional structures, which can be found in the prior art and will not be listed or described here.

[0063] The injection mold further comprises an impact mechanism 8 for applying an impact force to the injection molded product in the mold to obtain a product with varying thickness.

[0064] The impact mechanism 8 includes a power component 81 and a pulling plate assembly 82 .

[0065] The power component 81 is connected to the pulling plate assembly 82 and is used to provide power to drive the pulling plate assembly 82 to move up and down.

[0066] The plate assembly 82 is positioned between the movable platen 2 and the base plate 3 and includes an impact member 824. The plate assembly 82 is capable of moving up and down between the movable platen 2 and the base plate 3, thereby allowing the impact member 824 to approach or move away from the mold cavity 4. Specifically, as the plate assembly 82 moves upward, the impact member 824 gradually approaches the mold cavity 4; as the plate assembly 82 moves downward, the impact member 824 gradually moves away from the mold cavity 4.

[0067] The power component 81 drives the pulling plate assembly 82 to move toward the movable template 2, so that the impact member 824 in the pulling plate assembly 82 is close to the cavity 4 inside the fixed template 1. By appropriately controlling the moving position of the pulling plate assembly 82 according to the product thickness requirements, the impact member 824 can impact and thin the wall thickness of the injection molded product 7 in the cavity 4, thereby obtaining an injection molded product 7 with local thickness variation.

[0068] By providing an impact mechanism 8 with an impact member 824, the impact member 824 is used to thin the product to achieve a varying thickness, making it less susceptible to appearance defects and improving product stability and surface quality. Furthermore, the impact mechanism is simple in structure, low in cost, and easily configured and implemented within the mold. This improves the stability and surface quality of products with locally varying thicknesses in injection molds through simple structural improvements and at a low cost. Furthermore, the power component 81 is directly connected to the pull plate assembly 82, eliminating the need for additional drive connections. This further simplifies the impact mechanism 8 and reduces the space occupied within the mold.

[0069] exist Figure 1-6 In the illustrated embodiment, the pulling plate assembly 82 includes a plate body 821 and an adjusting member 822 .

[0070] The plate body 821 serves as the base of the pull plate assembly 82, and the impact member 824 is formed on the plate body 821, specifically on the side of the plate body 821 facing the movable plate 2. Figure 3 In the illustrated orientation, the impact member 824 is formed on the top surface of the plate 821 .

[0071] The regulating member 822 is also formed on the plate body 821, specifically on the side of the plate body 821 facing the movable plate 2. Figure 3 In the illustrated orientation, an adjustment member 822 is formed on the top surface of the plate body 821. The adjustment member 822 is used to adjust the distance that the pull plate assembly 82 moves toward the movable platen 2, thereby adjusting the distance that the impact member 824 extends into the mold cavity 5. Varying the distance that the impact member 824 extends into the mold cavity 5 can adjust the thickness of the molded product 7 located in the mold cavity 5 at the point where it contacts the impact member 824. In other words, the thickness of the resulting molded product 7 can be adjusted using the adjustment member 822.

[0072] The distance that the pulling plate assembly 82 moves toward the movable platen 2 is adjusted by the height of the adjusting member 822 .

[0073] The pull plate assembly 82 moves toward the moving plate 2 under the drive of the power component 81, that is, Figure 2 As the plate assembly 82 moves upward in the position shown, the top end of the adjusting member 822 gradually approaches the movable platen 2. When the top end of the adjusting member 822 contacts the bottom surface of the movable platen 2, the adjusting member 822 is stopped, and the plate assembly 82 no longer moves upward. By changing the height of the adjusting member 822, the upward movement distance of the plate assembly 82 can be adjusted.

[0074] In some embodiments, the adjusting member 822 is detachably formed on the plate 821 .

[0075] Since the adjusting member 822 is in rigid contact with the movable plate 2 at a high frequency and is easily damaged, the adjusting member 822 is detachably formed on the plate body 821 to facilitate replacement of the adjusting member 822 and improve the reliability of the adjusting member 822.

[0076] In an embodiment in which the moving distance of the pulling plate assembly 82 is adjusted by replacing the adjusting members 822 at different heights, the adjusting members 822 at different heights are replaced by the detachable structure of the adjusting members 822 to obtain injection molded products 7 of different thicknesses.

[0077] In some other embodiments, the adjusting member 822 itself is a height-adjustable structure, and the moving distance of the pull plate assembly 82 is adjusted by adjusting the height of the adjusting member, thereby achieving the purpose of obtaining injection molded products 7 of different thicknesses using one adjusting member.

[0078] exist Figure 1-6 In the illustrated embodiment, the adjusting member 822 includes a fixing portion 8221 and a limiting portion 8222 .

[0079] The fixing portion 8221 serves as the base portion of the adjusting member 822 and is detachably connected to the plate body 821. Specifically, an assembly hole is formed on the fixing portion 8221, and the fixing portion 8221 is detachably connected to the plate body 821 via screws 823.

[0080] The stopper 8222 is connected to the fixed portion 8221 and extends longitudinally from the fixed portion 8221 toward the movable platen 2. When the top surface of the stopper 8222 contacts the movable platen 2, the pull plate assembly 82 stops moving toward the movable platen 2. The length (i.e., height) of the stopper 8222 determines the distance the pull plate assembly 82 can move.

[0081] exist Figure 1-6 In the illustrated embodiment, the power component 81 is a hydraulic cylinder, an end cover 811 of the hydraulic cylinder is connected to the plate body 821 , and an extended end 812 of the piston rod of the hydraulic cylinder is connected to the base plate 3 .

[0082] Specifically, the end cover 811 and the cylinder body of the hydraulic cylinder are both located on the plate body 821 , the end cover 811 is connected to the plate body 821 via multiple connection fixing positions in the circumferential direction, and the protruding end 812 of the piston rod passes through the plate body 821 and is connected to the base plate 3 .

[0083] By arranging the end cover 811 and the cylinder body as a whole on the plate body 821, the connection firmness between the hydraulic oil cylinder and the plate body 821 and the stability of the hydraulic oil cylinder can be improved.

[0084] The extended end 812 of the piston rod is connected to the base plate 3. When the piston rod is extended, the extended end 812 of the piston rod and the base plate 3 remain relatively fixed, and the end cap 811 and the cylinder body of the hydraulic cylinder move upward, driving the pull plate assembly 82 upward. When the piston rod is retracted, the extended end 812 of the piston rod and the base plate 3 remain relatively fixed, and the end cap 811 and the cylinder body of the hydraulic cylinder move downward, driving the pull plate assembly 82 downward.

[0085] exist Figure 1-6 In the embodiment shown, the power component 81 includes two hydraulic cylinders, which are symmetrically arranged at two opposite ends of the plate 821. Figure 1 and Figure 2 In the orientation shown, the two hydraulic cylinders are located at the left and right ends of the plate 821 respectively.

[0086] By symmetrically arranging two hydraulic cylinders on the left and right sides of the plate body 821 , sufficient power is provided while ensuring the overall stability of the impact mechanism 8 .

[0087] In some other embodiments, the power component 81 may be one or more than two. The present invention does not limit the number of power components.

[0088] In some other embodiments, the power component 81 may be other devices capable of providing output power, and the present invention does not limit the specific type of the power component 81 .

[0089] exist Figure 1-6 In the illustrated embodiment, the injection mold further includes a plate guide 825. One end of the plate guide 825 is connected to the base plate 3, and the other end passes through a guide hole 8211 in the plate body 821, thereby guiding the vertical movement of the plate body 821. Four plate guides 825 are provided, dispersed across the base plate 3. In other embodiments, the number of plate guides 825 may be other, and this is not a limitation of the present invention.

[0090] exist Figure 1-6In the illustrated embodiment, the injection mold further includes a cushioning pad 826. The cushioning pad 826 is disposed on the side of the plate body 821 facing the base plate 3, i.e., the bottom of the plate body 821; alternatively, the cushioning pad 826 is disposed on the side of the base plate 3 facing the plate body 821, i.e., the top surface of the base plate 3, to reduce direct contact, collision, and wear between the plate body 821 and the base plate 3. Multiple cushioning pads 826 can be provided, dispersed across the bottom of the plate body 821 or dispersed across the top surface of the base plate 3.

[0091] exist Figure 1-6 In the illustrated embodiment, the impact member 824 is formed on the upper surface of the plate body 821 and extends upward from the upper surface of the plate body 821 toward the movable platen 2. The impact member 824 includes an impact rod 8241 and an impact head 8242. The lower end of the impact rod 8241 is connected to the plate body 821, and the impact head 8242 is formed at the upper end of the impact rod 8241, that is, the end near the movable platen 2. The upper surface of the impact head 8242 serves as the impact surface, which contacts the injection molded product 7 to be impacted and thinned.

[0092] The operation process of the injection mold having the above structure includes:

[0093] After the fixed plate 1 and the movable plate 2 are closed, before the power component 81 is activated, the pull plate assembly 82 falls on the bottom plate 3. The limit portion 8222 of the adjustment member 822 is spaced a certain distance from the movable plate 2, and the impact head 8242 of the impact member 824 is spaced a certain distance from the cavity 4.

[0094] Then, the power component 81 is activated, and the pull plate assembly 82 moves upward. After the stopper 8222 contacts the movable platen 2, the pull plate assembly 82 stops moving upward, and the impact head 8242 thins the injection molded product 7 in the cavity 4. During the thinning process, the power component 81 maintains the current power to prevent the thickness of the injection molded product 7 from changing and affecting product quality.

[0095] After the fixed platen 1 and the movable platen 2 are opened, the ejector plate 6 ejects the injection molded product 7, and the power component 81 is activated to move the pull plate assembly 82 to the initial position before mold closing for the next product injection molding process.

[0096] Some embodiments of the present invention further provide an injection molding machine comprising an injection system, a cooling system, and a mold clamping system, and also comprising the injection molds of the aforementioned embodiments. The injection molding machine of these embodiments can achieve the goal of improving the stability and surface quality of products with local thickness variations produced by injection molds at a low cost.

[0097] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the above embodiments, or to replace some of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present invention.

Claims

1. An injection mold, characterized in that: It includes a fixed plate, a movable plate and a bottom plate, wherein the movable plate is located between the fixed plate and the bottom plate; The injection mold further includes an impact mechanism, which includes: a pull plate assembly located between the bottom plate and the movable plate, comprising an impact member, wherein the pull plate assembly moves up and down between the bottom plate and the movable plate so that the impact member approaches or leaves the cavity located inside the fixed plate; A power component is connected to the pull plate assembly and is used to provide power to drive the pull plate assembly to move up and down.

2. The injection mold according to claim 1, characterized in that The pull plate assembly includes: a plate body, the impact member being formed on the plate body; An adjusting member is formed on the plate body and is used to adjust the distance that the pulling plate assembly moves toward the movable platen, thereby adjusting the distance that the impact member extends into the cavity.

3. The injection mold according to claim 2, characterized in that The adjusting member is detachably formed on the plate body.

4. The injection mold according to claim 3, characterized in that The adjusting member comprises: a fixing portion detachably connected to the plate body; A limiting portion is connected to the fixing portion and extends from the fixing portion toward the movable template in a length direction; when the limiting portion contacts the movable template, the pulling plate assembly stops moving toward the movable template.

5. The injection mold according to claim 2, characterized in that: The power component is a hydraulic oil cylinder, an end cover of the hydraulic oil cylinder is connected to the plate body, and an extended end of the piston rod of the hydraulic oil cylinder is connected to the base plate.

6. The injection mold according to claim 5, characterized in that The power component includes two hydraulic cylinders, and the two hydraulic cylinders are symmetrically arranged at two opposite end positions of the plate body.

7. The injection mold according to any one of claims 2 to 6, characterized in that The injection mold further comprises: A pull plate guide, one end of which is connected to the bottom plate and the other end of which passes through the plate body, is used to guide the movement of the pull plate assembly.

8. The injection mold according to any one of claims 2 to 6, characterized in that The injection mold further comprises: A buffer pad is arranged on the side of the plate body facing the bottom plate and / or on the side of the bottom plate facing the plate body.

9. The injection mold according to any one of claims 2 to 6, characterized in that The impact piece includes: An impact rod, one end of which is connected to the plate body and the other end of which extends toward the movable platen; An impact head is formed on one end of the impact rod close to the movable platen.

10. An injection molding machine, comprising an injection system, a cooling system and a mold clamping system, characterized in that: The injection molding machine further comprises the injection mold according to any one of claims 1 to 9 above.

Images