Linear machine bottom die protection structure

Abstract

The utility model discloses a linear machine bottom die protection structure belongs to bottle blowing mould technical field, aims at solving the existing linear bottle blowing machine in the bottle blowing process, and the bottom die retreats because of the reaction force of high pressure gas and causes the poor bottle bottom forming, produces the technical problem of convex bottom. The structure includes the template and the protection block of detachable fixed in the lower end clamping groove of template. The protection block is equipped with the supporting surface for supporting the bottom die. When the bottle blowing machine closes the mould, and the supported surface of bottom die and the supporting surface of protection block abut. When blowing the bottle, the protection block provides rigid support for the bottom die, effectively prevents the bottom die from retreating, thereby guaranteeing the forming quality of bottle bottom, fundamentally puts an end to the occurrence of convex bottom phenomenon. The utility model has the advantages of simple structure, low reconstruction cost, remarkable supporting effect, can effectively improve the product qualified rate and prolong the service life of mould.

Description

Technical Field

[0001] This utility model relates to the field of blow molding technology, and more specifically, to a bottom mold protection structure for a linear blow molding machine. Background Technology

[0002] Linear blow molding machines are the mainstream equipment for producing plastic bottles such as polyethylene terephthalate (PET). Their mold system typically consists of left and right cavities and a separate bottom mold, with the bottom mold responsible for the final shaping of the bottle bottom. During the blow molding process, especially in the high-pressure setting stage, the preform is instantly filled with high-pressure gas. This enormous pressure acts not only on the bottle walls but also directly on the bottle bottom, generating a strong axial thrust on the bottom mold. In traditional support structures, if the axial restraint of the bottom mold is not sufficiently robust, this thrust may cause a slight axial retreat of the bottom mold in the mold-closed state. Although this retreat is small, it is enough to disrupt the proper shaping of the bottle bottom, causing the bottom of the finished bottle to bulge outwards, forming a so-called "convex bottom." Bottles with convex bottoms cannot stand stably on a flat surface and are considered defective products, severely impacting production efficiency and product quality. Therefore, developing a structure that can provide stable and reliable support for the bottom mold to prevent its retreat under high pressure is a pressing technical problem to be solved in this field. Utility Model Content

[0003] The present invention provides a bottom mold protection structure for a linear motion machine, which can alleviate the above-mentioned problems.

[0004] To alleviate the above problems, the technical solution adopted by this utility model is as follows: A bottom mold protection structure for a linear motion machine includes: Template, the template having a card slot; and A protective block, wherein the protective block is detachably fixed in the slot by its mounting portion; The protective block has a support surface for supporting the bottom mold; when the blow molding machine is in the mold-closed state, the supported surface of the bottom mold abuts against the support surface of the protective block to provide axial support for the bottom mold.

[0005] Preferably, the protective block is an integral structure.

[0006] Preferably, the protective block is provided with mounting holes, and the protective block is fixed to the template by fasteners passing through the mounting holes.

[0007] Preferably, the mounting hole is a countersunk hole and the fastener is a countersunk bolt, so that the head of the fastener does not protrude from the surface of the protective block after installation.

[0008] Preferably, the supporting surface is a plane, and the supported surface of the bottom mold is a contact surface that mates with the plane.

[0009] Compared with the prior art, the beneficial effects of this utility model are: By creating a slot at the lower end of a rigid template and securely installing a protective block, a rigid, immovable support surface is provided for the bottom mold. During bottle blowing, the axial thrust from the high-pressure gas inside the bottle is fully absorbed by the protective block and transferred to the template, thus completely eliminating the possibility of the bottom mold retraction. This ensures that the bottle bottom can be precisely formed according to the mold design, fundamentally solving the quality defect of a protruding bottle bottom and significantly improving the product qualification rate.

[0010] The core component of this structure is a single protective block, which is simple in structure and easy to manufacture. Modifying existing blow molding machine molds only requires machining the corresponding groove at the lower end of the template and installing it using bolts or other common fasteners. The entire solution is ingeniously designed, has low modification costs, and is convenient to install and maintain, making it highly economical and worthy of widespread application.

[0011] By providing a solid backing for the bottom mold, wear and loosening of its positioning mechanism or transmission components are prevented from occurring due to repeated impacts. The protective block, as a direct load-bearing component, can be made of high-strength wear-resistant materials and can be replaced as a wear part, thereby protecting the more valuable bottom mold and template body, and extending the stable operation time and service life of the entire mold set.

[0012] 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

[0013] 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.

[0014] Figure 1 This is a schematic diagram of the protective block structure; Figure 2 This is a schematic diagram of the assembly of the protective block and the template; Figure 3 This is an assembly diagram of the protective block, template, and bottom mold; In the diagram: 1-protective block, 11-supporting surface, 12-installation part, 2-bottom mold, 21-supported surface, 3-template, 31-slot. Detailed Implementation

[0015] 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.

[0016] Please refer to Figure 1 , Figure 2 and Figure 3 This utility model provides a bottom mold protection structure for a linear blow molding machine, which is applied to the mold system of a linear blow molding machine. It mainly includes a protective block, a bottom mold, and a template.

[0017] The template is the load-bearing component of the blow molding die, and typically possesses high strength and rigidity. In this embodiment, a slot is formed at the lower edge of the template. This slot is a groove machined along the lower end of the template, and its shape and size are designed to precisely accommodate and position the protective block.

[0018] The protective block is the core component of this invention, and its function is to provide a rigid, immovable support for the bottom mold. The protective block is typically made of a high-strength, high-hardness, wear-resistant metal material (such as hardened tool steel) to withstand long-term high-pressure impacts without deformation or wear. The protective block is a one-piece structure, with an upper mounting portion that fits into the slot, and a flat support surface at the bottom.

[0019] During assembly, the mounting portion of the protective block is embedded in the slot of the template. To achieve a secure fixation, the protective block is provided with several mounting holes; in this preferred embodiment, these mounting holes are countersunk holes. Fasteners (e.g., countersunk bolts) pass through these countersunk holes to firmly secure the protective block to the template, ensuring that it will not move or loosen relative to the template under any operating conditions. The countersunk hole design allows the head of the fastener to be recessed below the surface of the protective block, avoiding interference.

[0020] The bottom mold is a movable part used to form the bottom of the bottle. Its lower surface, i.e. the supported surface, is designed as a flat contact surface.

[0021] The working principle of this utility model is as follows: When the blow molding machine performs the mold closing action, the bottom mold moves to its working position. At this time, the supported surface of the bottom mold will be in close contact with or maintain zero-gap contact with the supporting surface of the protective block that has been firmly fixed on the template.

[0022] During the subsequent high-pressure blowing stage, the high-pressure gas inside the preform generates a huge, downward axial thrust on the bottom area of ​​the bottle, attempting to push the bottom mold away from its working position. Since the supported surface of the bottom mold is already in contact with the supported surface of the protective block, this thrust is completely transferred to the protective block through the bottom mold. The protective block is then firmly fixed to the extremely rigid template, so the thrust is ultimately borne by the template. This forms a stable support chain, effectively preventing any axial retreat of the bottom mold.

[0023] Ultimately, the bottle bottom can be completely blown into shape in a precise position, thus ensuring the flatness and design shape of the bottle bottom and fundamentally eliminating the production of defective products with "convex bottoms" caused by the bottom mold retreating.

[0024] In summary, this utility model cleverly provides reliable rigid support for the bottom mold by adding a simple protective block at the lower end of the template, thus solving the product quality problem caused by the bottom mold of the linear motion machine retreating under force. Its structure is simple, easy to modify and install on existing equipment, and its effects are significant, demonstrating high industrial practical value.

[0025] 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 bottom mold protection structure for a linear motion machine, characterized in that, include: Template (3), wherein the template (3) is provided with a slot (31); as well as The protective block (1) is detachably fixed in the slot (31) by its mounting part (12); The protective block (1) is provided with a support surface (11) for supporting the bottom mold (2); when the blow molding machine is in the mold-closed state, the supported surface (21) of the bottom mold (2) abuts against the support surface (11) of the protective block (1) to provide axial support for the bottom mold (2).

2. The linear motion machine bottom mold protection structure according to claim 1, characterized in that, The protective block (1) is an integral structure.

3. The linear motion machine bottom mold protection structure according to claim 1, characterized in that, The protective block (1) is provided with mounting holes, and the protective block (1) is fixed to the template (3) by fasteners passing through the mounting holes.

4. The linear motion machine bottom mold protection structure according to claim 3, characterized in that, The mounting hole is a countersunk hole, and the fastener is a countersunk bolt, so that the head of the fastener does not protrude from the surface of the protective block (1) after installation.

5. The linear motion machine bottom mold protection structure according to claim 1, characterized in that, The supporting surface (11) is a plane, and the supported surface (21) of the bottom mold (2) is a contact surface that mates with the plane.

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