Full-automatic round die bottom die protection positioning structure

Abstract

The utility model discloses a full -automatic round mould base mould protection positioning structure belongs to bottle blowing mould technical field, aims at solving the problem of the damage of mould and the poor appearance of bottle bottom caused by friction and collision when the bottom mould and bottle body cavity mould are closed in prior art, and the structure includes bottle body cavity mould, movable bottom mould and the bottom mould protection block and cavity pad block of innovative setting, the bottom mould protection block is fixed to bottom mould outer periphery, and the cavity pad block is fixed to bottle body cavity mould lower extreme, when closing, the bottom mould protection block made of non - metallic wear - resisting material is contacted with cavity pad block in advance than metal bottom mould, and the effect of early direction and center positioning is played through the preset direction surface. The structure effectively prevents the hard friction between bottom mould and cavity, protects the core mould, ensures the positioning accuracy, thereby prolongs the mould life, and significantly improves the bottom appearance quality of bottle.

Description

Technical Field

[0001] This utility model relates to the field of blow molding technology, and more specifically, to a fully automatic circular mold bottom mold protection and positioning structure. Background Technology

[0002] In the field of fully automatic blow molding machines, blow molding molds are the core components, which typically include a body mold for shaping the bottle body and a bottom mold for shaping the bottle bottom. During the blow molding process, the bottom mold needs to move upward at high speed and with high precision to close with the body mold, forming a complete mold cavity for blow molding the preform.

[0003] In existing blow molding structures, both the bottom mold and the bottle cavity mold are typically made of high-hardness metal. During high-speed, frequent mold closing processes, even slight positioning deviations can easily cause the edges of the metal bottom mold to scrape or collide with the inner wall of the bottle cavity mold. This can lead to mold damage, decreased product quality, and reduced production efficiency.

[0004] Therefore, how to effectively avoid frictional damage between the bottom mold and the bottle cavity mold during the mold closing process, while ensuring high-precision positioning, is a technical problem that urgently needs to be solved in this field. Utility Model Content

[0005] The present invention provides a fully automatic circular mold bottom mold protection and positioning structure, which can alleviate the above-mentioned problems.

[0006] To alleviate the above problems, the technical solution adopted by this utility model is as follows: A fully automatic circular mold bottom mold protection and positioning structure includes a bottle body cavity mold and a bottom mold that can move axially and cooperate with the bottle body cavity mold to form a sealed mold cavity; the structure further includes: At least one bottom mold protection block fixed to the outer periphery of the bottom mold; And a cavity pad block fixed to the lower end face of the bottle body cavity mold and corresponding to the bottom mold protective block; During the mold closing process, when the bottom mold moves towards the bottle body cavity mold, the contact end face of the bottom mold protection block is configured to contact the corresponding end face of the cavity pad block before the bottom mold contacts the corresponding end face of the cavity pad block, thereby guiding and centering the movement of the bottom mold into the bottle body cavity mold.

[0007] Preferably, the bottom mold protective block is made of a non-metallic wear-resistant material.

[0008] Preferably, the bottom mold protective block is made of nylon plastic.

[0009] Preferably, the contact end face of the bottom mold protection block and / or the corresponding end face of the cavity pad block are provided with mutually cooperating guide bevels or rounded corners to smoothly guide the bottom mold to align with the center upon contact.

[0010] Compared with the prior art, the beneficial effects of this utility model are: (1) An innovative bottom mold protection block made of engineering plastics such as nylon is set up. When the mold is closed, this softer protection block contacts the cavity pad first, which effectively avoids hard contact and friction between the metal bottom mold and the metal bottle cavity mold. It is equivalent to adding a replaceable "buffer pad", which greatly protects the expensive core mold components, significantly extends the service life of the mold, and reduces maintenance costs.

[0011] (2) The contact surfaces of the bottom mold protection block and the cavity pad block are designed with guide slopes. Before the bottom mold is fully inserted into the bottle cavity mold, the two parts have already started to contact and guide each other, which can actively correct the slight positional deviation of the bottom mold and ensure that the bottom mold always enters vertically along the central axis. This achieves "guide first, then enter". This precise positioning fundamentally eliminates scratches caused by eccentricity, ensures the smoothness and appearance quality of the bottle bottom, and improves the product qualification rate.

[0012] (3) The protective positioning structure is ingeniously designed, adding only two simple components: the bottom mold protection block and the cavity pad block. As a vulnerable part, the bottom mold protection block is inexpensive to replace and easy to operate. It does not require disassembling the entire complex mold, which greatly reduces maintenance difficulty and downtime, and improves the overall operating efficiency of the production line.

[0013] (4) Because the structure effectively prevents mold damage, the equipment can operate stably at higher speeds without worrying about collisions, thereby improving the production cycle of a single machine and the overall capacity.

[0014] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, embodiments of this utility model are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a structural diagram of the bottle body cavity mold and bottom mold before assembly; Figure 2 This is a cross-sectional structural diagram of the bottle body cavity mold and the bottom mold assembled together; Figure label: 100: Bottle cavity mold 200: Bottom mold 300: Bottom mold protection block 400: Cavity pad Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0018] Please see the appendix Figure 1 and Figure 2 The accompanying drawing illustrates a fully automatic circular mold bottom mold protection and positioning structure according to an embodiment of this application.

[0019] This structure is used in the blow molding die of a fully automatic blow molding machine, and mainly includes a bottle body cavity mold 100 and a bottom mold 200. The bottle body cavity mold 100 is a hollow structure used to shape the main body of the bottle. The bottom mold 200 is used to shape the bottom of the bottle, and it can move up and down along an axis perpendicular to its bottom surface under the drive of the blow molding machine to achieve mold closing and opening with the bottle body cavity mold 100.

[0020] The core of the technical solution of this application is that the structure also includes: one or more bottom mold protection blocks 300 and a cavity pad block 400.

[0021] In a preferred embodiment, the bottom mold protection block 300 is fixedly installed on the outer peripheral wall of the bottom mold 200. To achieve a stable and uniform support and guiding effect, multiple bottom mold protection blocks 300 can be evenly distributed along the circumference of the bottom mold 200, such as the two shown in the figure, or three, four or more.

[0022] Correspondingly, an annular cavity pad 400 is fixedly installed on the lower end face of the bottle cavity mold 100, i.e., on the side facing the bottom mold 200. The inner diameter of the cavity pad 400 is larger than the outer diameter of the bottom mold 200, and its position corresponds to the bottom mold protection block 300.

[0023] To achieve its protective function, the material selection of the bottom mold protection block 300 is crucial. In this embodiment, the bottom mold 200 and the bottle cavity mold 100 are typically made of high-hardness metal materials (such as mold steel), while the bottom mold protection block 300 is preferably made of a non-metallic wear-resistant material. Specifically, this material can be nylon plastic, which has good wear resistance, self-lubricating properties, a certain impact toughness, and a low coefficient of friction. Of course, it can also be other engineering plastics with similar properties, such as polytetrafluoroethylene (PTFE) and polyoxymethylene (POM). This "soft" contact with "hard" design can effectively absorb impact and prevent scratches.

[0024] To achieve smooth guiding and positioning, the top contact surface of the bottom mold protection block 300 and / or the corresponding contact surface of the cavity pad block 400 are designed with mutually cooperating guiding structures. As shown in the cross-sectional view of the attached figure, both the outer upper end of the bottom mold protection block 300 and the inner edge of the cavity pad block 400 are provided with guide bevels (or chamfers). When the two are about to contact, these mutually cooperating bevels can automatically correct any slight center deviation that the bottom mold 200 may have, smoothly guiding it to the correct central axis, achieving flexible alignment.

[0025] The mold closing process of this structure is described in detail below: Initiating mold closing: After the blow molding machine issues the mold closing command, the bottom mold 200, together with the bottom mold protection block 300 fixed on it, begins to rise at high speed towards the stationary bottle cavity mold 100.

[0026] Guided contact: Due to the preset structural dimensions, before the metal surface of the bottom mold 200 used to form the bottle bottom enters the mold cavity of the bottle body mold 100, the top of the bottom mold protection block 300 installed on the periphery of the bottom mold 200 will first contact the cavity pad block 400 at the lower end of the bottle body mold 100.

[0027] Positioning Correction: After contact occurs, the guide ramps of the bottom mold protection block 300 and the cavity pad block 400 interact to immediately guide and center the attitude of the bottom mold 200. Even if the bottom mold 200 has a slight positional deviation during the ascent, it will be forcibly corrected back to the center position by this guide structure.

[0028] Safe entry: Due to the precise guidance and positioning completed in advance, when the bottom mold 200 continues to rise and fully enters the cavity of the bottle body mold 100, a preset safe gap can always be maintained between its outer metal wall and the inner metal wall of the bottle body mold 100, thereby completely avoiding hard friction and collision between the two.

[0029] Mold closing: Finally, the bottom mold 200, under precise guidance, reaches the predetermined position and closes tightly with the bottle body cavity mold 100 to form a complete blow molding cavity, ready for subsequent blow molding processes.

[0030] When the bottom mold protection block 300 wears out due to long-term use, it can be easily and quickly replaced by maintenance personnel because it is an independent and replaceable component. This is cost-effective and does not affect the precision and lifespan of the core mold.

[0031] In summary, this application cleverly solves the common friction damage problem in high-speed mold closing of fully automatic blow molding dies by adding a bottom mold protection block 300 and a cavity pad block 400 and utilizing their "soft contact" and "guided" principles. Its structure is simple, low-cost, and effective, and has high industrial practical value.

[0032] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A fully automatic circular mold bottom mold protection and positioning structure, comprising a bottle body cavity mold (100) and a bottom mold (200) movable axially and cooperating with the bottle body cavity mold (100) to form a sealed mold cavity; characterized in that, The structure also includes: At least one bottom mold protection block (300) is fixed to the outer periphery of the bottom mold (200). And a cavity pad (400) fixed to the lower end face of the bottle body cavity mold (100) and corresponding to the bottom mold protection block (300); During the mold closing process, when the bottom mold (200) moves towards the bottle body cavity mold (100), the contact end face of the bottom mold protection block (300) is configured to contact the corresponding end face of the cavity pad block (400) before the bottom mold (200), thereby guiding and centering the movement of the bottom mold (200) into the bottle body cavity mold (100).

2. The fully automatic circular mold bottom mold protection and positioning structure according to claim 1, characterized in that, The bottom mold protection block (300) is made of non-metallic wear-resistant material.

3. The fully automatic circular mold bottom mold protection and positioning structure according to claim 2, characterized in that, The bottom mold protection block (300) is made of nylon plastic.

4. The fully automatic circular mold bottom mold protection and positioning structure according to claim 1, characterized in that, The contact end face of the bottom mold protection block (300) and / or the corresponding end face of the cavity pad block (400) are provided with mutually cooperating guide slopes or rounded corners to smoothly guide the bottom mold (200) to align with the center when in contact.

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