Core pulling mechanism with anti-retreating function

Abstract

The utility model discloses a core-pulling mechanism with an anti-retreating function, which relates to the technical field of injection molds and comprises a mold main body, mounting plates are fixedly mounted on two sides of the upper end of the mold main body, two groups of detachable working boxes are fixedly mounted above the mold main body, core-pulling components are arranged in the two groups of detachable working boxes, and the core-pulling components are fixedly mounted on the mold main body. A quick dismounting and mounting assembly is arranged on the side, close to the core pulling assembly, in the detachable working box, and the core pulling assembly comprises an oil cylinder fixedly mounted at one end of the mounting plate. When a mold works and is prevented from moving, a first toothed plate is in contact with a first gear and drives the first gear to rotate, so that a second gear at the other end of a transmission belt rotates, a second toothed plate descends, a clamping block is clamped to the upper end of a moving-out push block, the push block is prevented from moving backwards during demolding, and the service life of the mold is prolonged. And therefore, the production cost is reduced, and the service life is prolonged in a disguised manner.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to a core pulling mechanism with an anti-retraction function. Background Art

[0002] Plastic molds are tools used in the plastic processing industry to match plastic molding machines and give plastic products a complete configuration and precise size. Due to the wide variety of plastics and processing methods, the structures of plastic molding machines and plastic products vary in complexity, and the types and structures of plastic molds are also diverse.

[0003] The existing patent (CN210651722U3) is a core-pulling mechanism for an injection mold with a locking function. The locking block and the locking block hydraulic cylinder are set to solve the problem of the core-pulling block retreating in the existing equipment. The hydraulic core-pulling cylinder can achieve higher-power injection molding products, and the core is not easily affected by the injection pressure, which can avoid product deviation. The mold production is stabilized, the number of defective products in the mold production debugging is reduced, the loss of raw materials is reduced, and the qualified rate of injection molded products is greatly improved.

[0004] However, the above technical solution has certain defects. When the core pulling block moves to the processing distance between the specified products, the second hydraulic cylinder needs to be started to fix the core pulling block. The second hydraulic cylinder will be damaged during the production work cycle of the second hydraulic cylinder, which increases the production cost in disguise and is inconvenient to use. Therefore, a core pulling mechanism with an anti-retreat function is proposed. Utility Model Content

[0005] Based on this, the purpose of the utility model is to provide a core pulling mechanism with an anti-retraction function to solve the technical problems raised in the above background.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a core pulling mechanism with an anti-retraction function, comprising a mold body, mounting plates are fixedly installed on both sides of the upper end of the mold body, two groups of detachable working boxes are fixedly installed above the mold body, core pulling assemblies are arranged in the two groups of detachable working boxes, and a quick-detachable mounting assembly is arranged on one side of the detachable working box close to the core pulling assembly;

[0007] The core pulling assembly includes an oil cylinder fixedly mounted on one end of a mounting plate, the other end of the oil cylinder is fixedly mounted with a top block, the inner sliding portion of the top block is slidably mounted, one end of the mounting block is fixedly mounted with a push block, two groups of first tooth plates are fixedly mounted at both ends of the push block, one end of the mold main body cavity has a first gear at a position in contact with the surface of the first tooth plate, the inner wall of the first gear is mounted with a rotating roller fixed to a bearing at the inner end portion of the mold main body cavity, two groups of tension springs are fixedly mounted below the detachable working box, the bottom end of the tension spring is fixedly mounted with a second tooth plate located above the push block, the outer wall of the rotating roller is sleeved with a transmission belt, the other end of the transmission belt is rotatably mounted with a second gear at a position in contact with the surface of the second tooth plate, and the bottom end of the second tooth plate is fixedly mounted with a clamping block at a position in contact with the surface of the push block.

[0008] As a preferred technical solution of the utility model, the quick-disassembly installation assembly includes a pulling cover slidably installed on the upper end of the top block, and a clamping rod that penetrates the cavity of the top block and extends to the contact position of the surface of the top block is installed at the bottom end of the pulling cover, and a telescopic spring is sleeved on the outer wall of the clamping rod, and the two ends of the telescopic spring are respectively fixed to the clamping rod and the inner end of the top block cavity, and the outer wall of the mounting block is provided with a clamping groove at the contact position with the surface of the clamping rod.

[0009] As a preferred technical solution of the utility model, a limiting groove is provided at the upper end of the push block at a position in contact with the surface of the clamping block, and the shape of the clamping block is fitted with the shape of the limiting groove.

[0010] As a preferred technical solution of the utility model, a rear cover plate is fixedly installed on the rear end of the detachable working box by bolts, and the rear cover plate is made of acrylic plate.

[0011] As a preferred technical solution of the utility model, one end of the oil cylinder is fixedly installed between the mounting plate by bolts.

[0012] As a preferred technical solution of the utility model, a through groove is formed at one end of the top block at a position in contact with the surface of the clamping rod, and the diameter of the through groove matches the diameter of the clamping rod.

[0013] As a preferred technical solution of the utility model, sliding blocks are fixedly installed at both ends of the second tooth plate, and guide rods are sleeved on the inner wall of the sliding block.

[0014] In summary, the utility model mainly has the following beneficial effects:

[0015] The utility model works on the mold and prevents it from moving. When the oil cylinder pushes out the ejecting block, the first tooth plate contacts the first gear and drives the first gear to rotate, so that the second gear at the other end of the transmission belt rotates, causing the second tooth plate to move downward, so that the clamping block is clamped on the upper end of the moving push block, preventing the push block from moving backward during demoulding, resulting in burrs or poor processing on the product, reducing production costs and indirectly increasing service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional overall structural diagram of the utility model;

[0017] Figure 2 This is a three-dimensional structural diagram of the detachable working box of the utility model;

[0018] Figure 3 This is a three-dimensional structural diagram of the core pulling assembly of the utility model;

[0019] Figure 4 For the utility model Figure 3 The structure diagram at A is enlarged;

[0020] Figure 5 It is a three-dimensional structural diagram of the quick disassembly and installation assembly of the utility model.

[0021] In the figure: 100, mold body;

[0022] 110. Mounting plate; 120. Removable working box; 130. Core pulling assembly; 140. Quick-detachable mounting assembly; 131. Oil cylinder; 132. Top block; 133. Mounting block; 134. Push block; 135. First tooth plate; 136. Rotating roller; 137. First gear; 138. Transmission belt; 139. Second gear; 1391. Second tooth plate; 1392. Extension spring; 1393. Card block; 141. Pull cover; 142. Card rod; 143. Telescopic spring; 144. Card slot. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. The embodiments described below with reference to the drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model.

[0024] The following describes an embodiment of the utility model based on its overall structure.

[0025] A core pulling mechanism with an anti-retraction function, such as Figure 1-5As shown, a mold body 100, mounting plates 110 are fixedly installed on both sides of the upper end of the mold body 100, two sets of detachable working boxes 120 are fixedly installed above the mold body 100, and core pulling assemblies 130 are arranged in the two sets of detachable working boxes 120, and a quick disassembly installation assembly 140 is arranged on one side of the detachable working box 120 near the core pulling assembly 130;

[0026] The core pulling assembly 130 includes a cylinder 131 fixedly mounted on one end of the mounting plate 110, a top block 132 fixedly mounted on the other end of the cylinder 131, a mounting block 133 slidably mounted inside the top block 132, a push block 134 fixedly mounted on one end of the mounting block 133, two sets of first tooth plates 135 fixedly mounted on both ends of the push block 134, a first gear 137 at a position in contact with the surface of the first tooth plate 135 at one end of the cavity of the mold body 100, and a first gear 137 at a position in contact with the surface of the first tooth plate 135 at the inner wall of the first gear 137. The rotating roller 136 is fixed by a bearing, and two groups of tension springs 1392 are fixedly installed below the detachable working box 120. The bottom end of the tension spring 1392 is fixedly installed with a second tooth plate 1391 located above the push block 134. The outer wall of the rotating roller 136 is sleeved with a transmission belt 138. The other end of the transmission belt 138 has a second gear 139 rotatably installed on the inner wall at a position in contact with the surface of the second tooth plate 1391. The bottom end of the second tooth plate 1391 is fixedly installed with a clamping block 1393 at a position in contact with the surface of the push block 134.

[0027] When the mold is working and preventing it from moving, when the oil cylinder 131 pushes out the ejector block 132, the first tooth plates 135 installed on both sides of the push block 134 are prompted to contact the first gear 137, and drive the first gear 137 to rotate, and at the same time, the outer wall of the rotating roller 136 is sleeved with the transmission belt 138 for transmission, and the second gear 139 fixed with the bearing at the other end of the transmission belt 138 at the inner end of the detachable working box 120 is rotated, causing the second tooth plate 1391 meshing at one end of the second gear 139 to move downward, and at the same time, the clamping block 1393 installed at the bottom end of the second tooth plate 1391 is clamped on the upper end of the moved push block 134 to prevent the push block 134 from moving backward during demoulding, resulting in burrs or poor processing of the product, reducing production costs and indirectly increasing the service life.

[0028] Please refer to Figure 4 and Figure 5The quick-disassembly installation assembly 140 includes a pulling cover 141 slidably installed on the upper end of the top block 132, and a clamping rod 142 that penetrates the cavity of the top block 132 and extends to the contact position on the surface of the top block 132 is installed at the bottom end of the pulling cover 141. A telescopic spring 143 is sleeved on the outer wall of the clamping rod 142, and the two ends of the telescopic spring 143 are respectively fixed to the clamping rod 142 and the inner end of the cavity of the top block 132. A clamping groove 144 is formed on the outer wall of the installation block 133 at the contact position with the surface of the clamping rod 142, and a through groove is formed at one end of the top block 132 at the contact position with the surface of the clamping rod 142, and the diameter of the through groove matches the diameter of the clamping rod 142.

[0029] When the rear cover is disassembled from the detachable working box 120 by bolts, the pulling cover 141 is pulled upward, causing the telescopic spring 143 sleeved on the outer wall of the pulling cover 141 to be compressed, and causing the mounting clamping rod 142 at the bottom end of the pulling cover 141 to be pulled upward, driving the bottom end of the clamping rod 142 to lose the engagement with the clamping groove 144 on the upper surface of the mounting block 133, thereby achieving quick disassembly and replacement of the push block 134, and preventing the push block 134 from being worn out due to long-term use and affecting the production efficiency of the product.

[0030] Please refer to Figure 3 and Figure 4 A limiting groove is provided at the upper end of the push block 134 at a position in contact with the surface of the clamping block 1393, and the shape of the clamping block 1393 is fitted with the shape of the limiting groove.

[0031] When the push block 134 moves to below the clamping block 1393 , the second tooth plate 1391 simultaneously forces the clamping block 1393 to engage and fix the limiting groove on the upper end of the push block 134 to prevent it from moving backward.

[0032] Please refer to Figure 3 and Figure 4 The rear end of the detachable working box 120 is fixed with a rear cover plate by bolts, and the rear cover plate is made of acrylic plate.

[0033] After the rear cover is disassembled by turning the bolts, lubricating oil can be sprayed onto the first gear 137 , thereby increasing the transmission service life of the first gear 137 .

[0034] Please refer to Figure 3 and Figure 4 Sliding blocks are fixedly installed at both ends of the second tooth plate 1391, and guide rods are sleeved on the inner wall of the sliding block.

[0035] When the second tooth plate 1391 moves, a sliding block can be installed along one end to slide up and down smoothly.

[0036] When in use, when the mold is working and preventing it from moving, when the oil cylinder 131 pushes out the ejection block 132, the first tooth plates 135 installed on both sides of the push block 134 are prompted to contact the first gear 137 and drive the first gear 137 to rotate, and at the same time, the outer wall of the rotating roller 136 is sleeved with the transmission belt 138 for transmission, and the second gear 139 fixed with the bearing at the other end of the transmission belt 138 at the inner end of the detachable working box 120 is rotated, causing the second tooth plate 1391 meshing with one end of the second gear 139 to move downward, and at the same time, the clamping block 1393 installed at the bottom end of the second tooth plate 1391 is clamped on the upper end of the moved push block 134 to prevent the push block 134 from moving backward during demoulding. The movement causes burrs or poor processing on the product, reduces production costs, and increases service life in disguise. When the rear cover plate is disassembled from the detachable working box 120 by bolts, the pull cover 141 is pulled upward, causing the telescopic spring 143 sleeved on the outer wall of the pull cover 141 to be compressed, and the clamping rod 142 installed at the bottom end of the pull cover 141 is pulled upward, driving the bottom end of the clamping rod 142 to lose the clamping installation on the clamping groove 144 on the upper surface of the mounting block 133, so as to achieve quick disassembly and replacement of the push block 134, and prevent the push block 134 from affecting the production efficiency of the product after being worn out due to long-term use. The parts not involved in the device are the same as the prior art or can be implemented by the prior art.

[0037] Although an embodiment of the utility model has been shown and described, this specific embodiment is merely an explanation of the utility model and is not a limitation of the utility model. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contributions as needed without departing from the principles and purpose of the utility model. However, as long as they are within the scope of the claims of the utility model, they are protected by patent law.

Claims

1. A core pulling mechanism with an anti-retraction function, comprising a mold body (100), characterized in that: Mounting plates (110) are fixedly mounted on both sides of the upper end of the mold body (100); two groups of detachable working boxes (120) are fixedly mounted above the mold body (100); core pulling assemblies (130) are arranged in the two groups of detachable working boxes (120); and a quick-detachable mounting assembly (140) is arranged on one side of the detachable working box (120) close to the core pulling assembly (130); The core pulling assembly (130) comprises an oil cylinder (131) fixedly mounted on one end of the mounting plate (110); a top block (132) is fixedly mounted on the other end of the oil cylinder (131); a mounting block (133) is slidably mounted inside the top block (132); a push block (134) is fixedly mounted on one end of the mounting block (133); two sets of first tooth plates (135) are fixedly mounted on both ends of the push block (134); a first gear (137) is provided at one end of the cavity of the mold body (100) at a position in contact with the surface of the first tooth plate (135); a gear (137) is provided on the inner wall of the first gear (137) so as to contact the cavity of the mold body (100); A rotating roller (136) with an inner end bearing fixed thereon, two groups of tension springs (1392) are fixedly installed below the detachable working box (120), a second tooth plate (1391) located above the push block (134) is fixedly installed at the bottom end of the tension spring (1392), a transmission belt (138) is sleeved on the outer wall of the rotating roller (136), a second gear (139) is rotatably installed on the inner wall of the other end of the transmission belt (138) at a position in contact with the surface of the second tooth plate (1391), and a clamping block (1393) is fixedly installed at the bottom end of the second tooth plate (1391) at a position in contact with the surface of the push block (134).

2. A core-pulling mechanism with an anti-retraction function according to claim 1, characterized in that: The quick-detachable installation assembly (140) comprises a pulling cover (141) slidably installed on the upper end of the top block (132); a clamping rod (142) penetrating the cavity of the top block (132) and extending to a position where the top block (132) contacts the surface is installed at the bottom end of the pulling cover (141); a telescopic spring (143) is sleeved on the outer wall of the clamping rod (142); two ends of the telescopic spring (143) are respectively fixed to the clamping rod (142) and the inner end of the cavity of the top block (132); and a clamping groove (144) is provided on the outer wall of the installation block (133) at a position where the clamping rod (142) contacts the surface is opened.

3. The core-pulling mechanism with anti-retraction function according to claim 1, characterized in that: The upper end of the push block (134) is provided with a limiting groove at a position in contact with the surface of the clamping block (1393), and the shape of the clamping block (1393) is fitted into the shape of the limiting groove.

4. The core-pulling mechanism with anti-retraction function according to claim 1, characterized in that: A rear cover plate is fixedly mounted on the rear end of the detachable working box (120) by means of bolts, and the rear cover plate is made of an acrylic plate.

5. The core-pulling mechanism with anti-retraction function according to claim 1, characterized in that: One end of the oil cylinder (131) is fixedly mounted on the mounting plate (110) via bolts.

6. The core-pulling mechanism with anti-retraction function according to claim 1, characterized in that: One end of the top block (132) is provided with a through groove at a position in contact with the surface of the clamping rod (142), and the diameter of the through groove matches the diameter of the clamping rod (142).

7. The core-pulling mechanism with anti-retraction function according to claim 1, characterized in that: Sliding blocks are fixedly mounted on both ends of the second tooth plate (1391), and guide rods are sleeved on the inner walls of the sliding blocks.

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