Novel combined mold

Abstract

The utility model belongs to the technical field of plant fiber mould pressing plane industrial pallets, and particularly discloses a novel combined mould which comprises an upper mould and a lower mould, the lower mould comprises a base, a bottom mould base and a middle mould base, a middle section groove is arranged on the middle mould base, the middle mould base is arranged on the upper side of the bottom mould base, and the middle section groove is arranged on the lower side of the middle mould base. A first guide piece is fixedly connected to the base, a limiting block is fixedly connected to the upper end of the first guide piece, the first guide piece is sleeved with a guide cylinder, the guide cylinder is fixedly connected to the middle die base, an elastic piece is connected between the guide cylinder and the base, and a receding hole for part of the bottom die base to pass through is formed in the middle groove. The upper die can be operated to stretch into the middle groove, the middle die base is driven to move downwards after raw materials are pressed, and then extrusion is conducted through the bottom die base. And the density and the strength of the lower part are enhanced, and the probability of cavity cracks is greatly reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of plant fiber molded flat industrial trays, in particular to a novel combined mold. Background Art

[0002] Wooden pallets are an environmentally friendly and economical means of transportation, widely used in manufacturing, warehousing, and other fields. In the molded wood and rice husk pallet industries, the quality, efficiency, and cost of the finished product are closely linked to the molds used. Sawdust is mixed with glue and then placed into the mold, where it is pressurized and heated to form the product. The product's curved surface and leg strength determine its load-bearing capacity. Typically, the mold consists of an upper and lower mold, each secured to a press with flowing hot oil. The press opens and closes the mold to produce the product.

[0003] Due to the large height of the legs and the slow flow of sawdust, existing molds often have defects such as leg cavitation, cracks and holes. At the same time, the bearing strength will decrease and the strength requirements will not be met. Utility Model Content

[0004] In order to solve the problem that wooden pallets in the prior art are prone to defects such as cavitation, cracks and holes in the legs, a new type of combined mold is proposed. This utility model provides the following technical solutions:

[0005] A new type of combined mold includes an upper mold and a lower mold, the lower mold includes a base, a bottom mold base and a middle mold base, the middle mold base is provided with a middle mold groove, the middle mold base is arranged on the upper side of the bottom mold base, the base is fixedly connected to a first guide member, the upper end of the first guide member is fixedly connected to a limiting block, the first guide member is sleeved with a guide cylinder, the guide cylinder is fixedly connected to the middle mold base, an elastic member is connected between the guide cylinder and the base, the middle mold groove is provided with a makeshift hole for the bottom mold base to pass through, the upper mold can be operated to extend into the middle mold groove, and after pressing the raw material, it drives the middle mold base to move downward, and then extrude it through the bottom mold base.

[0006] Preferably, the elastic member is a spring.

[0007] Preferably, the spring is sleeved outside the first guide member, with the upper end abutting against the guide cylinder and the lower end abutting against the base.

[0008] Preferably, a convex block for producing a concave shape is fixedly connected to the bottom mold base.

[0009] Preferably, three or more protrusions are arranged at equal intervals.

[0010] Preferably, a support leg is fixedly connected to the lower side of the upper mold.

[0011] Preferably, the supporting legs are wedge-shaped and narrow at the bottom and wide at the top.

[0012] Preferably, there are three or more legs arranged at equal intervals.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. This structure increases the amount of material in the lower part. Under the same pressure and temperature, the density of the lower part of the outrigger is increased. The strength is enhanced, and the probability of voids and cracks is greatly reduced.

[0015] 2. By enlarging the far end of the mold cavity, the density of the product at the far end is greatly increased, thereby improving the product qualification rate;

[0016] 3. The original lower mold is divided into two layers, and the tool shank for processing the mold is shortened, which increases the rigidity and improves the processing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0018] Figure 2 It is a structural schematic diagram of the pressed state;

[0019] Figure 3 It is a schematic diagram of the structure before pressing;

[0020] In the accompanying drawings, 1. upper mold; 11. support leg; 2. lower mold; 21. base; 22. bottom mold base; 221. protrusion; 23. middle mold base; 231. middle groove; 232. support leg groove; 3. first guide member; 4. limit block; 5. spring. DETAILED DESCRIPTION

[0021] The directional terms mentioned in the following embodiments, such as "up", "down", "left", "right", etc., are only used with reference to the directions of the drawings. Therefore, the directional terms used are used to illustrate rather than limit the invention of the utility model.

[0022] like Figure 1-3As shown, a new type of combined mold includes an upper mold 1 and a lower mold 2, the lower mold 2 includes a base 21, a bottom mold base 22 and a middle mold base 23, the middle mold base 23 is provided with a middle groove 231 and a leg groove 232, the middle mold base 23 is arranged on the upper side of the bottom mold base 22, the base 21 is fixedly connected with a first guide member 3, the upper end of the first guide member 3 is fixedly connected to a limiting block 4, the first guide member 3 is sleeved with a guide cylinder, the guide cylinder is fixedly connected to the middle mold base 23, an elastic member is connected between the guide cylinder and the base 21, the middle groove 231 is provided with a makeshift hole for a part of the bottom mold base 22 to pass through, the upper mold 1 can be driven by a hydraulic cylinder to extend into the middle groove 231, and after pressing the raw material, it drives the middle mold base 23 to move downward, and then extrude it through the bottom mold base 22. The gap between the middle die holder 23 and the bottom die holder 22 increases the amount of raw material in the leg groove 232, allowing the leg 11 to be filled with more material after the leg 11 is pressed downward. When the upper die 1 begins to press downward, the material in the middle die holder 23 is first compacted. As the middle die holder 23 continues to descend, the bottom die holder 22 also begins to squeeze upward (similar to the material in the cavity below the leg 11 being squeezed from below). The leg 11 is pressed into the leg groove 232 until the press compacts it in the mold. This structure significantly increases the material in the lower portion, increasing the density of the lower portion of the leg 11 at the same pressure and temperature. This enhances strength and significantly reduces the likelihood of voids and cracks. By enlarging the distal end of the mold cavity, the density of the product at this distal end is significantly increased, improving the product yield rate. Furthermore, the original lower die 2 is divided into two layers, shortening the tool shank used to process the mold, increasing rigidity and enhancing processability.

[0023] Specifically, the elastic member is a spring 5, which is low in cost. The spring 5 is sleeved outside the first guide member 3, with the upper end abutting against the guide cylinder and the lower end abutting against the base 21. The limit block 4 is detachable, specifically, it can be connected by a thread, making the spring 5 easier and more convenient to replace.

[0024] Furthermore, a protrusion 221 is fixedly connected to the bottom mold base 22, and the middle mold base 23 is slidably connected to the protrusion 221; the protrusions 221 are arranged at equal intervals, and three are arranged in the same direction to improve the stability of the movement of the middle mold base 23.

[0025] Specifically, the first guide member 3 and the protrusion 221 are both columnar, preferably cylindrical.

[0026] Furthermore, a support leg 11 is fixedly connected to the lower side of the upper mold 1. The support leg 11 is wedge-shaped with a narrow bottom and a wide top, which can form an inner cavity of the support leg and transmit pressure, converting the downward force into a circumferential force to improve the compaction effect.

Claims

1. A novel combined mold, comprising an upper mold (1) and a lower mold (2), characterized in that: The lower mold (2) comprises a base (21), a bottom mold base (22) and a middle mold base (23), the middle mold base (23) is provided with a middle groove (231), the middle mold base (23) is provided on the upper side of the bottom mold base (22), the base (21) is fixedly connected with a first guide member (3), the upper end of the first guide member (3) is fixedly connected with a limiting block (4), the first guide member (3) is sleeved with a guide cylinder, the guide cylinder is fixedly connected to the middle mold base (23), an elastic member is connected between the guide cylinder and the base (21), the middle groove (231) is provided with a clearance hole for a part of the bottom mold base (22) to pass through, the upper mold (1) can be operated to extend into the middle groove (231), and after pressing the raw material, it drives the middle mold base (23) to move downward, and then extrude through the bottom mold base (22).

2. The novel combined mold according to claim 1, characterized in that: The elastic member is a spring (5).

3. The novel combined mold according to claim 2, characterized in that: The spring (5) is sleeved outside the first guide member (3), with the upper end abutting against the guide cylinder and the lower end abutting against the base (21).

4. The novel combined mold according to claim 1, characterized in that: A convex block (221) for generating a concave shape is fixedly connected to the bottom mold base (22).

5. The novel combined mold according to claim 4, characterized in that: More than three of the protrusions (221) are arranged at equal intervals.

6. The novel combined mold according to claim 1, characterized in that: A support leg (11) is fixedly connected to the lower side of the upper mold (1).

7. The novel combined mold according to claim 6, characterized in that: The supporting leg (11) is wedge-shaped and narrow at the bottom and wide at the top.

8. The novel combined mold according to claim 7, characterized in that: More than three supporting legs (11) are arranged at equal intervals.

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